annotate tincan.py @ 38:336bc2f622e4 draft header-includes

Preliminary revisions to some draft documentation.
author David Barts <n5jrn@me.com>
date Tue, 28 May 2019 20:17:10 -0700
parents ce67eac10fc7
children df27cf08c093
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rev   line source
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1 #!/usr/bin/env python3
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2 # -*- coding: utf-8 -*-
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3 # As with Bottle, it's all in one big, ugly file. For now.
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4
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5 # I m p o r t s
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6
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7 import os, sys
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8 import ast
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9 import binascii
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10 from base64 import b16encode, b16decode
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11 import functools
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12 import importlib
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13 from inspect import isclass
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14 import io
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15 import py_compile
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16 from stat import S_ISDIR, S_ISREG
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17 from string import whitespace
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18 import traceback
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19 import urllib
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20
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21 import bottle
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22
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23 # E x c e p t i o n s
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24
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25 class TinCanException(Exception):
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26 """
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27 The parent class of all exceptions we raise.
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28 """
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29 pass
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30
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31 class TemplateHeaderError(TinCanException):
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32 """
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33 Raised upon encountering a syntax error in the template headers.
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34 """
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35 def __init__(self, message, line):
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36 super().__init__(message, line)
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37 self.message = message
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38 self.line = line
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39
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40 def __str__(self):
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41 return "line {0}: {1}".format(self.line, self.message)
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42
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43 class LoadError(TinCanException):
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44 """
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45 Raised when we run into problems #load'ing something, usually
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46 because it doesn't exist.
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47 """
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48 def __init__(self, message, source):
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49 super().__init__(message, source)
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50 self.message = message
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51 self.source = source
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52
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53 def __str__(self):
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54 return "{0}: #load error: {1}".format(self.source, self.message)
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55
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56 class ForwardException(TinCanException):
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57 """
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58 Raised to effect the flow control needed to do a forward (server-side
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59 redirect). It is ugly to do this, but other Python frameworks do and
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60 there seems to be no good alternative.
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61 """
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62 def __init__(self, target):
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63 self.target = target
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64
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65 class TinCanError(TinCanException):
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66 """
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67 General-purpose exception thrown by TinCan when things go wrong, often
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68 when attempting to launch webapps.
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69 """
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70 pass
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71
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72 # T e m p l a t e s
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73 #
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74 # Template (.pspx) files. These are standard templates for a supported
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75 # template engine, but with an optional set of header lines that begin
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76 # with '#'.
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77
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78 class TemplateFile(object):
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79 """
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80 Parse a template file into a header part and the body part. The header
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81 is always a leading set of lines, each starting with '#', that is of the
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82 same format regardless of the template body. The template body varies
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83 depending on the selected templating engine. The body part has
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84 each header line replaced by a blank line. This preserves the overall
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85 line numbering when processing the body. The added newlines are normally
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86 stripped out before the rendered page is sent back to the client.
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87 """
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88 _END = "#end"
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89 _LEND = len(_END)
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90 _WS = set(whitespace)
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91
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92 def __init__(self, raw, encoding='utf-8'):
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93 if isinstance(raw, io.TextIOBase):
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94 self._do_init(raw)
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95 elif isinstance(raw, str):
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96 with open(raw, "r", encoding=encoding) as fp:
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97 self._do_init(fp)
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98 else:
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99 raise TypeError("Expecting a string or Text I/O object.")
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100
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101 def _do_init(self, fp):
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102 self._hbuf = []
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103 self._bbuf = []
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104 self._state = self._header
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105 while True:
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106 line = fp.readline()
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107 if line == '':
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108 break
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109 self._state(line)
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110 self.header = ''.join(self._hbuf)
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111 self.body = ''.join(self._bbuf)
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112
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113 def _header(self, line):
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114 if not line.startswith('#'):
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115 self._state = self._body
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116 self._state(line)
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117 return
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118 if line.startswith(self._END) and (len(line) == self._LEND or line[self._LEND] in self._WS):
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119 self._state = self._body
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120 self._hbuf.append(line)
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121 self._bbuf.append("\n")
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122
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123 def _body(self, line):
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124 self._bbuf.append(line)
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125
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126 class TemplateHeader(object):
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127 """
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128 Parses and represents a set of header lines.
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129 """
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130 _NAMES = [ "errors", "forward", "methods", "python", "template" ]
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131 _FNAMES = [ "hidden" ]
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132 _ANAMES = [ "load" ]
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133
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134 def __init__(self, string):
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135 # Initialize our state
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136 for i in self._NAMES:
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137 setattr(self, i, None)
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138 for i in self._FNAMES:
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139 setattr(self, i, False)
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140 for i in self._ANAMES:
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141 setattr(self, i, [])
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142 # Parse the string
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143 count = 0
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144 nameset = set(self._NAMES + self._FNAMES + self._ANAMES)
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145 seen = set()
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146 lines = string.split("\n")
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147 if lines and lines[-1] == "":
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148 del lines[-1]
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149 for line in lines:
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150 # Get line
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151 count += 1
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152 if not line.startswith("#"):
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153 raise TemplateHeaderError("Does not start with '#'.", count)
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154 try:
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155 rna, rpa = line.split(maxsplit=1)
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156 except ValueError:
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diff changeset
157 rna = line.rstrip()
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diff changeset
158 rpa = None
0
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159 # Get name, ignoring remarks.
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160 name = rna[1:]
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161 if name == "rem":
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162 continue
5
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diff changeset
163 if name == "end":
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164 break
0
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165 if name not in nameset:
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166 raise TemplateHeaderError("Invalid directive: {0!r}".format(rna), count)
0
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167 if name in seen:
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168 raise TemplateHeaderError("Duplicate {0!r} directive.".format(rna), count)
24
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diff changeset
169 if name not in self._ANAMES:
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diff changeset
170 seen.add(name)
0
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171 # Flags
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172 if name in self._FNAMES:
0
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173 setattr(self, name, True)
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174 continue
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175 # Get parameter
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176 if rpa is None:
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177 raise TemplateHeaderError("Missing parameter.", count)
0
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178 param = rpa.strip()
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179 for i in [ "'", '"']:
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180 if param.startswith(i) and param.endswith(i):
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181 param = ast.literal_eval(param)
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182 break
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183 # Update this object
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diff changeset
184 if name in self._ANAMES:
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diff changeset
185 getattr(self, name).append(param)
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diff changeset
186 else:
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187 setattr(self, name, param)
0
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188
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189 # C h a m e l e o n
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diff changeset
190 #
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41da0b3d2156 Rename #include to #load (more descriptive).
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191 # Support for Chameleon templates (the kind TinCan uses).
0
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192
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193 class ChameleonTemplate(bottle.BaseTemplate):
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194 def prepare(self, **options):
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195 from chameleon import PageTemplate, PageTemplateFile
0
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196 if self.source:
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197 self.tpl = PageTemplate(self.source, **options)
0
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198 else:
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199 self.tpl = PageTemplateFile(self.filename, encoding=self.encoding,
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diff changeset
200 search_path=self.lookup, **options)
37
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diff changeset
201 # XXX - work around broken Chameleon decoding
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202 self.tpl.default_encoding = self.encoding
0
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203
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204 def render(self, *args, **kwargs):
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205 for dictarg in args:
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206 kwargs.update(dictarg)
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207 _defaults = self.defaults.copy()
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208 _defaults.update(kwargs)
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209 return self.tpl.render(**_defaults)
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210
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diff changeset
211 chameleon_template = functools.partial(bottle.template, template_adapter=ChameleonTemplate)
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diff changeset
212 chameleon_view = functools.partial(bottle.view, template_adapter=ChameleonTemplate)
0
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213
2
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diff changeset
214 # U t i l i t i e s
0
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215
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216 def _normpath(base, unsplit):
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217 """
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218 Split, normalize and ensure a possibly relative path is absolute. First
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219 argument is a list of directory names, defining a base. Second
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220 argument is a string, which may either be relative to that base, or
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221 absolute. Only '/' is supported as a separator.
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222 """
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223 scratch = unsplit.strip('/').split('/')
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224 if not unsplit.startswith('/'):
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225 scratch = base + scratch
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226 ret = []
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227 for i in scratch:
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228 if i == '.':
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229 continue
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230 if i == '..':
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231 ret.pop() # may raise IndexError
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232 continue
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233 ret.append(i)
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234 return ret
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235
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236 def _mangle(string):
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237 """
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238 Turn a possibly troublesome identifier into a mangled one.
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239 """
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240 first = True
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241 ret = []
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242 for ch in string:
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243 if ch == '_' or not (ch if first else "x" + ch).isidentifier():
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244 ret.append('_')
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245 ret.append(b16encode(ch.encode("utf-8")).decode("us-ascii"))
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246 else:
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247 ret.append(ch)
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248 first = False
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249 return ''.join(ret)
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250
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251 # The TinCan class. Simply a Bottle webapp that contains a forward method, so
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252 # the code-behind can call request.app.forward().
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253
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254 class TinCan(bottle.Bottle):
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255 def forward(self, target):
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256 """
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257 Forward this request to the specified target route.
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258 """
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diff changeset
259 source = bottle.request.environ['PATH_INFO']
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260 base = source.strip('/').split('/')[:-1]
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diff changeset
261 if bottle.request.environ.get(_FTYPE, False):
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diff changeset
262 raise TinCanError("{0}: forward from error page".format(source))
0
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diff changeset
263 try:
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264 exc = ForwardException('/' + '/'.join(_normpath(base, target)))
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diff changeset
265 except IndexError as e:
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266 raise TinCanError("{0}: invalid forward to {1!r}".format(source, target)) from e
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267 raise exc
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268
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diff changeset
269 # C o d e B e h i n d
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270 #
0
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271 # Represents the code-behind of one of our pages. This gets subclassed, of
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diff changeset
272 # course.
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273
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diff changeset
274 class BasePage(object):
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diff changeset
275 """
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diff changeset
276 The parent class of both error and normal pages' code-behind.
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diff changeset
277 """
0
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278 def handle(self):
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279 """
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280 This is the entry point for the code-behind logic. It is intended
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281 to be overridden.
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282 """
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283 pass
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284
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285 def export(self):
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286 """
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287 Export template variables. The default behavior is to export all
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diff changeset
288 non-hidden non-callables that don't start with an underscore.
0
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289 This method can be overridden if a different behavior is
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290 desired. It should always return a dict or dict-like object.
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291 """
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diff changeset
292 ret = { 'page': self }
0
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293 for name in dir(self):
9
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diff changeset
294 if name in self._HIDDEN or name.startswith('_'):
0
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diff changeset
295 continue
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296 value = getattr(self, name)
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diff changeset
297 if callable(value):
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diff changeset
298 continue
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diff changeset
299 ret[name] = value
4
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diff changeset
300 return ret
0
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301
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diff changeset
302 class Page(BasePage):
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8037bad7d5a8 Update documentation, fix some #forward bugs.
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diff changeset
303 """
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diff changeset
304 The code-behind for a normal page.
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parents: 9
diff changeset
305 """
9
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diff changeset
306 # Non-private things we refuse to export anyhow.
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diff changeset
307 _HIDDEN = set([ "request", "response" ])
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diff changeset
308
75e375b1976a Error pages now can have code-behind.
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diff changeset
309 def __init__(self, req, resp):
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diff changeset
310 """
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diff changeset
311 Constructor. This is a lightweight operation.
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parents: 8
diff changeset
312 """
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diff changeset
313 self.request = req # app context is request.app in Bottle
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diff changeset
314 self.response = resp
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parents: 8
diff changeset
315
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diff changeset
316 class ErrorPage(BasePage):
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diff changeset
317 """
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diff changeset
318 The code-behind for an error page.
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diff changeset
319 """
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diff changeset
320 _HIDDEN = set()
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parents: 8
diff changeset
321
75e375b1976a Error pages now can have code-behind.
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parents: 8
diff changeset
322 def __init__(self, req, err):
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diff changeset
323 """
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parents: 8
diff changeset
324 Constructor. This is a lightweight operation.
75e375b1976a Error pages now can have code-behind.
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parents: 8
diff changeset
325 """
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diff changeset
326 self.request = req
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diff changeset
327 self.error = err
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parents: 8
diff changeset
328
24
34d3cfcd37ef First batch of work on getting a #include header. Unfinished.
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diff changeset
329 # I n c l u s i o n
34d3cfcd37ef First batch of work on getting a #include header. Unfinished.
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diff changeset
330 #
29
2e3ac3d7b0a4 A possible workaround for the drainbamage (needs testing)?
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diff changeset
331 # Most processing is in the TinCanRoute class; this just interprets and
35
41da0b3d2156 Rename #include to #load (more descriptive).
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parents: 34
diff changeset
332 # represents arguments to the #load header directive.
24
34d3cfcd37ef First batch of work on getting a #include header. Unfinished.
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parents: 23
diff changeset
333
35
41da0b3d2156 Rename #include to #load (more descriptive).
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diff changeset
334 class _LoadedFile(object):
29
2e3ac3d7b0a4 A possible workaround for the drainbamage (needs testing)?
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parents: 26
diff changeset
335 def __init__(self, raw):
2e3ac3d7b0a4 A possible workaround for the drainbamage (needs testing)?
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parents: 26
diff changeset
336 if raw.startswith('<') and raw.endswith('>'):
2e3ac3d7b0a4 A possible workaround for the drainbamage (needs testing)?
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parents: 26
diff changeset
337 raw = raw[1:-1]
2e3ac3d7b0a4 A possible workaround for the drainbamage (needs testing)?
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diff changeset
338 self.in_lib = True
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diff changeset
339 else:
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diff changeset
340 self.in_lib = False
31
443a0001d841 Improve the #include syntax a bit.
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diff changeset
341 equals = raw.find('=')
443a0001d841 Improve the #include syntax a bit.
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diff changeset
342 if equals < 0:
33
cc975bf7a3fa Fix bug in auto-generated include variables.
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diff changeset
343 self.vname = os.path.splitext(os.path.basename(raw))[0]
31
443a0001d841 Improve the #include syntax a bit.
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diff changeset
344 self.fname = raw
443a0001d841 Improve the #include syntax a bit.
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diff changeset
345 else:
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diff changeset
346 self.vname = raw[:equals]
443a0001d841 Improve the #include syntax a bit.
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diff changeset
347 self.fname = raw[equals+1:]
29
2e3ac3d7b0a4 A possible workaround for the drainbamage (needs testing)?
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parents: 26
diff changeset
348 if self.vname == "":
2e3ac3d7b0a4 A possible workaround for the drainbamage (needs testing)?
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diff changeset
349 raise ValueError("empty variable name")
2e3ac3d7b0a4 A possible workaround for the drainbamage (needs testing)?
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parents: 26
diff changeset
350 if self.fname == "":
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diff changeset
351 raise ValueError("empty file name")
2e3ac3d7b0a4 A possible workaround for the drainbamage (needs testing)?
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diff changeset
352 if not self.fname.endswith(_IEXTEN):
2e3ac3d7b0a4 A possible workaround for the drainbamage (needs testing)?
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diff changeset
353 raise ValueError("file does not end in {0}".format(_IEXTEN))
24
34d3cfcd37ef First batch of work on getting a #include header. Unfinished.
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parents: 23
diff changeset
354
34
0fb455b46e5f Add cache.
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diff changeset
355 # Using a cache is likely to help efficiency a lot, since many pages
35
41da0b3d2156 Rename #include to #load (more descriptive).
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parents: 34
diff changeset
356 # will typically #load the same standard stuff.
34
0fb455b46e5f Add cache.
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diff changeset
357 _tcache = {}
37
ce67eac10fc7 Allow global character encoding specification.
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diff changeset
358 def _get_template(name, direct, coding):
34
0fb455b46e5f Add cache.
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diff changeset
359 aname = os.path.abspath(os.path.join(direct, name))
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diff changeset
360 if aname not in _tcache:
37
ce67eac10fc7 Allow global character encoding specification.
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diff changeset
361 tmpl = ChameleonTemplate(name=name, lookup=[direct], encoding=coding)
34
0fb455b46e5f Add cache.
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diff changeset
362 tmpl.prepare()
0fb455b46e5f Add cache.
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parents: 33
diff changeset
363 assert aname == tmpl.filename
0fb455b46e5f Add cache.
David Barts <n5jrn@me.com>
parents: 33
diff changeset
364 _tcache[aname] = tmpl
0fb455b46e5f Add cache.
David Barts <n5jrn@me.com>
parents: 33
diff changeset
365 return _tcache[aname]
0fb455b46e5f Add cache.
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parents: 33
diff changeset
366
2
ca6f8ca38cf2 Another backup commit.
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parents: 1
diff changeset
367 # R o u t e s
ca6f8ca38cf2 Another backup commit.
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diff changeset
368 #
0
e726fafcffac For backup purposes, UNFINISHED!!
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parents:
diff changeset
369 # Represents a route in TinCan. Our launcher creates these on-the-fly based
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parents:
diff changeset
370 # on the files it finds.
e726fafcffac For backup purposes, UNFINISHED!!
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parents:
diff changeset
371
2
ca6f8ca38cf2 Another backup commit.
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parents: 1
diff changeset
372 _ERRMIN = 400
ca6f8ca38cf2 Another backup commit.
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diff changeset
373 _ERRMAX = 599
29
2e3ac3d7b0a4 A possible workaround for the drainbamage (needs testing)?
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parents: 26
diff changeset
374 _IEXTEN = ".pt"
2
ca6f8ca38cf2 Another backup commit.
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diff changeset
375 _PEXTEN = ".py"
ca6f8ca38cf2 Another backup commit.
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parents: 1
diff changeset
376 _TEXTEN = ".pspx"
1
94b36e721500 Another check in to back stuff up.
David Barts <n5jrn@me.com>
parents: 0
diff changeset
377 _FLOOP = "tincan.forwards"
94b36e721500 Another check in to back stuff up.
David Barts <n5jrn@me.com>
parents: 0
diff changeset
378 _FORIG = "tincan.origin"
9
75e375b1976a Error pages now can have code-behind.
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diff changeset
379 _FTYPE = "tincan.iserror"
1
94b36e721500 Another check in to back stuff up.
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parents: 0
diff changeset
380
4
0d47859f792a Finally got "hello, world" working. Still likely many bugs.
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parents: 3
diff changeset
381 class _TinCanErrorRoute(object):
1
94b36e721500 Another check in to back stuff up.
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parents: 0
diff changeset
382 """
9
75e375b1976a Error pages now can have code-behind.
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parents: 8
diff changeset
383 A route to an error page. These don't get routes created for them,
75e375b1976a Error pages now can have code-behind.
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parents: 8
diff changeset
384 and are only reached if an error routes them there. Unless you create
75e375b1976a Error pages now can have code-behind.
David Barts <n5jrn@me.com>
parents: 8
diff changeset
385 custom code-behind, only two variables are available to your template:
75e375b1976a Error pages now can have code-behind.
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parents: 8
diff changeset
386 request (bottle.Request) and error (bottle.HTTPError).
1
94b36e721500 Another check in to back stuff up.
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parents: 0
diff changeset
387 """
35
41da0b3d2156 Rename #include to #load (more descriptive).
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parents: 34
diff changeset
388 def __init__(self, template, loads, klass):
1
94b36e721500 Another check in to back stuff up.
David Barts <n5jrn@me.com>
parents: 0
diff changeset
389 self._template = template
23
e8b6ee7e5b6b Well, *that* attempt at includes didn't work. Revert.
David Barts <n5jrn@me.com>
parents: 22
diff changeset
390 self._template.prepare()
35
41da0b3d2156 Rename #include to #load (more descriptive).
David Barts <n5jrn@me.com>
parents: 34
diff changeset
391 self._loads = loads
9
75e375b1976a Error pages now can have code-behind.
David Barts <n5jrn@me.com>
parents: 8
diff changeset
392 self._class = klass
1
94b36e721500 Another check in to back stuff up.
David Barts <n5jrn@me.com>
parents: 0
diff changeset
393
94b36e721500 Another check in to back stuff up.
David Barts <n5jrn@me.com>
parents: 0
diff changeset
394 def __call__(self, e):
11
8037bad7d5a8 Update documentation, fix some #forward bugs.
David Barts <n5jrn@me.com>
parents: 9
diff changeset
395 bottle.request.environ[_FTYPE] = True
17
8186de188daf Improve the run-time error handling in code-behinds.
David Barts <n5jrn@me.com>
parents: 16
diff changeset
396 try:
8186de188daf Improve the run-time error handling in code-behinds.
David Barts <n5jrn@me.com>
parents: 16
diff changeset
397 obj = self._class(bottle.request, e)
8186de188daf Improve the run-time error handling in code-behinds.
David Barts <n5jrn@me.com>
parents: 16
diff changeset
398 obj.handle()
35
41da0b3d2156 Rename #include to #load (more descriptive).
David Barts <n5jrn@me.com>
parents: 34
diff changeset
399 tvars = self._loads.copy()
29
2e3ac3d7b0a4 A possible workaround for the drainbamage (needs testing)?
David Barts <n5jrn@me.com>
parents: 26
diff changeset
400 tvars.update(obj.export())
36
4ed261056057 Put old newline logic back.
David Barts <n5jrn@me.com>
parents: 35
diff changeset
401 return self._template.render(tvars).lstrip('\n')
17
8186de188daf Improve the run-time error handling in code-behinds.
David Barts <n5jrn@me.com>
parents: 16
diff changeset
402 except bottle.HTTPResponse as e:
8186de188daf Improve the run-time error handling in code-behinds.
David Barts <n5jrn@me.com>
parents: 16
diff changeset
403 return e
8186de188daf Improve the run-time error handling in code-behinds.
David Barts <n5jrn@me.com>
parents: 16
diff changeset
404 except Exception as e:
8186de188daf Improve the run-time error handling in code-behinds.
David Barts <n5jrn@me.com>
parents: 16
diff changeset
405 traceback.print_exc()
18
e88ab99914cf More improvements to the error reportage.
David Barts <n5jrn@me.com>
parents: 17
diff changeset
406 # Bottle doesn't allow error handlers to themselves cause
e88ab99914cf More improvements to the error reportage.
David Barts <n5jrn@me.com>
parents: 17
diff changeset
407 # errors, most likely as a measure to prevent looping. So
e88ab99914cf More improvements to the error reportage.
David Barts <n5jrn@me.com>
parents: 17
diff changeset
408 # this will cause a "Critical error while processing request"
e88ab99914cf More improvements to the error reportage.
David Barts <n5jrn@me.com>
parents: 17
diff changeset
409 # page to be displayed, and any installed error pages to be
e88ab99914cf More improvements to the error reportage.
David Barts <n5jrn@me.com>
parents: 17
diff changeset
410 # ignored.
17
8186de188daf Improve the run-time error handling in code-behinds.
David Barts <n5jrn@me.com>
parents: 16
diff changeset
411 raise bottle.HTTPError(status=500, exception=e)
1
94b36e721500 Another check in to back stuff up.
David Barts <n5jrn@me.com>
parents: 0
diff changeset
412
4
0d47859f792a Finally got "hello, world" working. Still likely many bugs.
David Barts <n5jrn@me.com>
parents: 3
diff changeset
413 class _TinCanRoute(object):
0
e726fafcffac For backup purposes, UNFINISHED!!
David Barts <n5jrn@me.com>
parents:
diff changeset
414 """
e726fafcffac For backup purposes, UNFINISHED!!
David Barts <n5jrn@me.com>
parents:
diff changeset
415 A route created by the TinCan launcher.
e726fafcffac For backup purposes, UNFINISHED!!
David Barts <n5jrn@me.com>
parents:
diff changeset
416 """
e726fafcffac For backup purposes, UNFINISHED!!
David Barts <n5jrn@me.com>
parents:
diff changeset
417 def __init__(self, launcher, name, subdir):
e726fafcffac For backup purposes, UNFINISHED!!
David Barts <n5jrn@me.com>
parents:
diff changeset
418 self._fsroot = launcher.fsroot
e726fafcffac For backup purposes, UNFINISHED!!
David Barts <n5jrn@me.com>
parents:
diff changeset
419 self._urlroot = launcher.urlroot
e726fafcffac For backup purposes, UNFINISHED!!
David Barts <n5jrn@me.com>
parents:
diff changeset
420 self._name = name
2
ca6f8ca38cf2 Another backup commit.
David Barts <n5jrn@me.com>
parents: 1
diff changeset
421 self._python = name + _PEXTEN
ca6f8ca38cf2 Another backup commit.
David Barts <n5jrn@me.com>
parents: 1
diff changeset
422 self._fspath = os.path.join(launcher.fsroot, *subdir, name + _TEXTEN)
ca6f8ca38cf2 Another backup commit.
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parents: 1
diff changeset
423 self._urlpath = self._urljoin(launcher.urlroot, *subdir, name + _TEXTEN)
0
e726fafcffac For backup purposes, UNFINISHED!!
David Barts <n5jrn@me.com>
parents:
diff changeset
424 self._origin = self._urlpath
e726fafcffac For backup purposes, UNFINISHED!!
David Barts <n5jrn@me.com>
parents:
diff changeset
425 self._subdir = subdir
e726fafcffac For backup purposes, UNFINISHED!!
David Barts <n5jrn@me.com>
parents:
diff changeset
426 self._seen = set()
e726fafcffac For backup purposes, UNFINISHED!!
David Barts <n5jrn@me.com>
parents:
diff changeset
427 self._app = launcher.app
35
41da0b3d2156 Rename #include to #load (more descriptive).
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parents: 34
diff changeset
428 self._save_loads = launcher.debug
37
ce67eac10fc7 Allow global character encoding specification.
David Barts <n5jrn@me.com>
parents: 36
diff changeset
429 self._encoding = launcher.encoding
0
e726fafcffac For backup purposes, UNFINISHED!!
David Barts <n5jrn@me.com>
parents:
diff changeset
430
2
ca6f8ca38cf2 Another backup commit.
David Barts <n5jrn@me.com>
parents: 1
diff changeset
431 def launch(self):
0
e726fafcffac For backup purposes, UNFINISHED!!
David Barts <n5jrn@me.com>
parents:
diff changeset
432 """
e726fafcffac For backup purposes, UNFINISHED!!
David Barts <n5jrn@me.com>
parents:
diff changeset
433 Launch a single page.
e726fafcffac For backup purposes, UNFINISHED!!
David Barts <n5jrn@me.com>
parents:
diff changeset
434 """
e726fafcffac For backup purposes, UNFINISHED!!
David Barts <n5jrn@me.com>
parents:
diff changeset
435 # Build master and header objects, process #forward directives
11
8037bad7d5a8 Update documentation, fix some #forward bugs.
David Barts <n5jrn@me.com>
parents: 9
diff changeset
436 oheader = None
0
e726fafcffac For backup purposes, UNFINISHED!!
David Barts <n5jrn@me.com>
parents:
diff changeset
437 while True:
11
8037bad7d5a8 Update documentation, fix some #forward bugs.
David Barts <n5jrn@me.com>
parents: 9
diff changeset
438 try:
8037bad7d5a8 Update documentation, fix some #forward bugs.
David Barts <n5jrn@me.com>
parents: 9
diff changeset
439 self._template = TemplateFile(self._fspath)
8037bad7d5a8 Update documentation, fix some #forward bugs.
David Barts <n5jrn@me.com>
parents: 9
diff changeset
440 except IOError as e:
12
496d43d551d2 More redirecting fixes and improved error reportage.
David Barts <n5jrn@me.com>
parents: 11
diff changeset
441 if oheader is not None:
496d43d551d2 More redirecting fixes and improved error reportage.
David Barts <n5jrn@me.com>
parents: 11
diff changeset
442 note = "{0}: invalid #forward: ".format(self._origin)
496d43d551d2 More redirecting fixes and improved error reportage.
David Barts <n5jrn@me.com>
parents: 11
diff changeset
443 else:
496d43d551d2 More redirecting fixes and improved error reportage.
David Barts <n5jrn@me.com>
parents: 11
diff changeset
444 note = ""
496d43d551d2 More redirecting fixes and improved error reportage.
David Barts <n5jrn@me.com>
parents: 11
diff changeset
445 raise TinCanError("{0}{1!s}".format(note, e)) from e
4
0d47859f792a Finally got "hello, world" working. Still likely many bugs.
David Barts <n5jrn@me.com>
parents: 3
diff changeset
446 try:
0d47859f792a Finally got "hello, world" working. Still likely many bugs.
David Barts <n5jrn@me.com>
parents: 3
diff changeset
447 self._header = TemplateHeader(self._template.header)
9
75e375b1976a Error pages now can have code-behind.
David Barts <n5jrn@me.com>
parents: 8
diff changeset
448 except TemplateHeaderError as e:
4
0d47859f792a Finally got "hello, world" working. Still likely many bugs.
David Barts <n5jrn@me.com>
parents: 3
diff changeset
449 raise TinCanError("{0}: {1!s}".format(self._fspath, e)) from e
11
8037bad7d5a8 Update documentation, fix some #forward bugs.
David Barts <n5jrn@me.com>
parents: 9
diff changeset
450 if oheader is None:
8037bad7d5a8 Update documentation, fix some #forward bugs.
David Barts <n5jrn@me.com>
parents: 9
diff changeset
451 oheader = self._header # save original header
8037bad7d5a8 Update documentation, fix some #forward bugs.
David Barts <n5jrn@me.com>
parents: 9
diff changeset
452 elif (oheader.errors is None) != (self._header.errors is None):
8037bad7d5a8 Update documentation, fix some #forward bugs.
David Barts <n5jrn@me.com>
parents: 9
diff changeset
453 raise TinCanError("{0}: invalid #forward".format(self._origin))
0
e726fafcffac For backup purposes, UNFINISHED!!
David Barts <n5jrn@me.com>
parents:
diff changeset
454 if self._header.forward is None:
e726fafcffac For backup purposes, UNFINISHED!!
David Barts <n5jrn@me.com>
parents:
diff changeset
455 break
12
496d43d551d2 More redirecting fixes and improved error reportage.
David Barts <n5jrn@me.com>
parents: 11
diff changeset
456 # print("forwarding from:", self._urlpath) # debug
0
e726fafcffac For backup purposes, UNFINISHED!!
David Barts <n5jrn@me.com>
parents:
diff changeset
457 self._redirect()
12
496d43d551d2 More redirecting fixes and improved error reportage.
David Barts <n5jrn@me.com>
parents: 11
diff changeset
458 # print("forwarded to:", self._urlpath) # debug
4
0d47859f792a Finally got "hello, world" working. Still likely many bugs.
David Barts <n5jrn@me.com>
parents: 3
diff changeset
459 # If this is a #hidden page, we ignore it for now, since hidden pages
0
e726fafcffac For backup purposes, UNFINISHED!!
David Barts <n5jrn@me.com>
parents:
diff changeset
460 # don't get routes made for them.
11
8037bad7d5a8 Update documentation, fix some #forward bugs.
David Barts <n5jrn@me.com>
parents: 9
diff changeset
461 if oheader.hidden and not oheader.errors:
0
e726fafcffac For backup purposes, UNFINISHED!!
David Barts <n5jrn@me.com>
parents:
diff changeset
462 return
4
0d47859f792a Finally got "hello, world" working. Still likely many bugs.
David Barts <n5jrn@me.com>
parents: 3
diff changeset
463 # Get the code-behind #python
15
560c8fb55e4a Fix bugs in #python directive, make code-behind class loading simpler.
David Barts <n5jrn@me.com>
parents: 14
diff changeset
464 if self._header.python is None:
560c8fb55e4a Fix bugs in #python directive, make code-behind class loading simpler.
David Barts <n5jrn@me.com>
parents: 14
diff changeset
465 self._python_specified = False
560c8fb55e4a Fix bugs in #python directive, make code-behind class loading simpler.
David Barts <n5jrn@me.com>
parents: 14
diff changeset
466 else:
2
ca6f8ca38cf2 Another backup commit.
David Barts <n5jrn@me.com>
parents: 1
diff changeset
467 if not self._header.python.endswith(_PEXTEN):
4
0d47859f792a Finally got "hello, world" working. Still likely many bugs.
David Barts <n5jrn@me.com>
parents: 3
diff changeset
468 raise TinCanError("{0}: #python files must end in {1}".format(self._urlpath, _PEXTEN))
0
e726fafcffac For backup purposes, UNFINISHED!!
David Barts <n5jrn@me.com>
parents:
diff changeset
469 self._python = self._header.python
15
560c8fb55e4a Fix bugs in #python directive, make code-behind class loading simpler.
David Barts <n5jrn@me.com>
parents: 14
diff changeset
470 self._python_specified = True
0
e726fafcffac For backup purposes, UNFINISHED!!
David Barts <n5jrn@me.com>
parents:
diff changeset
471 # Obtain a class object by importing and introspecting a module.
3
c6902cded64d Corrections and reorg.
David Barts <n5jrn@me.com>
parents: 2
diff changeset
472 self._getclass()
35
41da0b3d2156 Rename #include to #load (more descriptive).
David Barts <n5jrn@me.com>
parents: 34
diff changeset
473 # Build body object (#template) and obtain #loads.
3
c6902cded64d Corrections and reorg.
David Barts <n5jrn@me.com>
parents: 2
diff changeset
474 if self._header.template is not None:
c6902cded64d Corrections and reorg.
David Barts <n5jrn@me.com>
parents: 2
diff changeset
475 if not self._header.template.endswith(_TEXTEN):
4
0d47859f792a Finally got "hello, world" working. Still likely many bugs.
David Barts <n5jrn@me.com>
parents: 3
diff changeset
476 raise TinCanError("{0}: #template files must end in {1}".format(self._urlpath, _TEXTEN))
16
448fc3d534f8 Improve error reportage.
David Barts <n5jrn@me.com>
parents: 15
diff changeset
477 try:
29
2e3ac3d7b0a4 A possible workaround for the drainbamage (needs testing)?
David Barts <n5jrn@me.com>
parents: 26
diff changeset
478 rtpath = self._splitpath(self._header.template)
2e3ac3d7b0a4 A possible workaround for the drainbamage (needs testing)?
David Barts <n5jrn@me.com>
parents: 26
diff changeset
479 tpath = os.path.normpath(os.path.join(self._fsroot, *rtpath))
16
448fc3d534f8 Improve error reportage.
David Barts <n5jrn@me.com>
parents: 15
diff changeset
480 tfile = TemplateFile(tpath)
29
2e3ac3d7b0a4 A possible workaround for the drainbamage (needs testing)?
David Barts <n5jrn@me.com>
parents: 26
diff changeset
481 except OSError as e:
16
448fc3d534f8 Improve error reportage.
David Barts <n5jrn@me.com>
parents: 15
diff changeset
482 raise TinCanError("{0}: invalid #template: {1!s}".format(self._urlpath, e)) from e
448fc3d534f8 Improve error reportage.
David Barts <n5jrn@me.com>
parents: 15
diff changeset
483 except IndexError as e:
448fc3d534f8 Improve error reportage.
David Barts <n5jrn@me.com>
parents: 15
diff changeset
484 raise TinCanError("{0}: invalid #template".format(self._urlpath)) from e
37
ce67eac10fc7 Allow global character encoding specification.
David Barts <n5jrn@me.com>
parents: 36
diff changeset
485 self._body = ChameleonTemplate(source=tfile.body, encoding=self._encoding)
3
c6902cded64d Corrections and reorg.
David Barts <n5jrn@me.com>
parents: 2
diff changeset
486 else:
37
ce67eac10fc7 Allow global character encoding specification.
David Barts <n5jrn@me.com>
parents: 36
diff changeset
487 self._body = ChameleonTemplate(source=self._template.body, encoding=self._encoding)
29
2e3ac3d7b0a4 A possible workaround for the drainbamage (needs testing)?
David Barts <n5jrn@me.com>
parents: 26
diff changeset
488 self._body.prepare()
35
41da0b3d2156 Rename #include to #load (more descriptive).
David Barts <n5jrn@me.com>
parents: 34
diff changeset
489 # Process loads
41da0b3d2156 Rename #include to #load (more descriptive).
David Barts <n5jrn@me.com>
parents: 34
diff changeset
490 self._loads = {}
41da0b3d2156 Rename #include to #load (more descriptive).
David Barts <n5jrn@me.com>
parents: 34
diff changeset
491 for load in self._header.load:
29
2e3ac3d7b0a4 A possible workaround for the drainbamage (needs testing)?
David Barts <n5jrn@me.com>
parents: 26
diff changeset
492 try:
35
41da0b3d2156 Rename #include to #load (more descriptive).
David Barts <n5jrn@me.com>
parents: 34
diff changeset
493 load = _LoadedFile(load)
29
2e3ac3d7b0a4 A possible workaround for the drainbamage (needs testing)?
David Barts <n5jrn@me.com>
parents: 26
diff changeset
494 except ValueError as e:
35
41da0b3d2156 Rename #include to #load (more descriptive).
David Barts <n5jrn@me.com>
parents: 34
diff changeset
495 raise TinCanError("{0}: bad #load: {1!s}".format(self._urlpath, e)) from e
41da0b3d2156 Rename #include to #load (more descriptive).
David Barts <n5jrn@me.com>
parents: 34
diff changeset
496 if load.in_lib:
29
2e3ac3d7b0a4 A possible workaround for the drainbamage (needs testing)?
David Barts <n5jrn@me.com>
parents: 26
diff changeset
497 fdir = os.path.join(self._fsroot, _WINF, "tlib")
2e3ac3d7b0a4 A possible workaround for the drainbamage (needs testing)?
David Barts <n5jrn@me.com>
parents: 26
diff changeset
498 else:
32
3382799f3905 Refinements.
David Barts <n5jrn@me.com>
parents: 31
diff changeset
499 fdir = os.path.join(self._fsroot, *self._subdir)
29
2e3ac3d7b0a4 A possible workaround for the drainbamage (needs testing)?
David Barts <n5jrn@me.com>
parents: 26
diff changeset
500 try:
37
ce67eac10fc7 Allow global character encoding specification.
David Barts <n5jrn@me.com>
parents: 36
diff changeset
501 tmpl = _get_template(load.fname, fdir, self._encoding)
29
2e3ac3d7b0a4 A possible workaround for the drainbamage (needs testing)?
David Barts <n5jrn@me.com>
parents: 26
diff changeset
502 except Exception as e:
35
41da0b3d2156 Rename #include to #load (more descriptive).
David Barts <n5jrn@me.com>
parents: 34
diff changeset
503 raise TinCanError("{0}: bad #load: {1!s}".format(self._urlpath, e)) from e
41da0b3d2156 Rename #include to #load (more descriptive).
David Barts <n5jrn@me.com>
parents: 34
diff changeset
504 self._loads[load.vname] = tmpl.tpl
9
75e375b1976a Error pages now can have code-behind.
David Barts <n5jrn@me.com>
parents: 8
diff changeset
505 # If this is an #errors page, register it as such.
11
8037bad7d5a8 Update documentation, fix some #forward bugs.
David Barts <n5jrn@me.com>
parents: 9
diff changeset
506 if oheader.errors is not None:
8037bad7d5a8 Update documentation, fix some #forward bugs.
David Barts <n5jrn@me.com>
parents: 9
diff changeset
507 self._mkerror(oheader.errors)
9
75e375b1976a Error pages now can have code-behind.
David Barts <n5jrn@me.com>
parents: 8
diff changeset
508 return # this implies #hidden
75e375b1976a Error pages now can have code-behind.
David Barts <n5jrn@me.com>
parents: 8
diff changeset
509 # Get #methods for this route
75e375b1976a Error pages now can have code-behind.
David Barts <n5jrn@me.com>
parents: 8
diff changeset
510 if self._header.methods is None:
75e375b1976a Error pages now can have code-behind.
David Barts <n5jrn@me.com>
parents: 8
diff changeset
511 methods = [ 'GET' ]
75e375b1976a Error pages now can have code-behind.
David Barts <n5jrn@me.com>
parents: 8
diff changeset
512 else:
75e375b1976a Error pages now can have code-behind.
David Barts <n5jrn@me.com>
parents: 8
diff changeset
513 methods = [ i.upper() for i in self._header.methods.split() ]
75e375b1976a Error pages now can have code-behind.
David Barts <n5jrn@me.com>
parents: 8
diff changeset
514 if not methods:
75e375b1976a Error pages now can have code-behind.
David Barts <n5jrn@me.com>
parents: 8
diff changeset
515 raise TinCanError("{0}: no #methods specified".format(self._urlpath))
3
c6902cded64d Corrections and reorg.
David Barts <n5jrn@me.com>
parents: 2
diff changeset
516 # Register this thing with Bottle
6
a3823da7bb45 Minor tweaks.
David Barts <n5jrn@me.com>
parents: 5
diff changeset
517 print("adding route:", self._origin, '('+','.join(methods)+')') # debug
3
c6902cded64d Corrections and reorg.
David Barts <n5jrn@me.com>
parents: 2
diff changeset
518 self._app.route(self._origin, methods, self)
c6902cded64d Corrections and reorg.
David Barts <n5jrn@me.com>
parents: 2
diff changeset
519
c6902cded64d Corrections and reorg.
David Barts <n5jrn@me.com>
parents: 2
diff changeset
520 def _splitpath(self, unsplit):
c6902cded64d Corrections and reorg.
David Barts <n5jrn@me.com>
parents: 2
diff changeset
521 return _normpath(self._subdir, unsplit)
c6902cded64d Corrections and reorg.
David Barts <n5jrn@me.com>
parents: 2
diff changeset
522
11
8037bad7d5a8 Update documentation, fix some #forward bugs.
David Barts <n5jrn@me.com>
parents: 9
diff changeset
523 def _mkerror(self, rerrors):
3
c6902cded64d Corrections and reorg.
David Barts <n5jrn@me.com>
parents: 2
diff changeset
524 try:
11
8037bad7d5a8 Update documentation, fix some #forward bugs.
David Barts <n5jrn@me.com>
parents: 9
diff changeset
525 errors = [ int(i) for i in rerrors.split() ]
3
c6902cded64d Corrections and reorg.
David Barts <n5jrn@me.com>
parents: 2
diff changeset
526 except ValueError as e:
c6902cded64d Corrections and reorg.
David Barts <n5jrn@me.com>
parents: 2
diff changeset
527 raise TinCanError("{0}: bad #errors line".format(self._urlpath)) from e
c6902cded64d Corrections and reorg.
David Barts <n5jrn@me.com>
parents: 2
diff changeset
528 if not errors:
c6902cded64d Corrections and reorg.
David Barts <n5jrn@me.com>
parents: 2
diff changeset
529 errors = range(_ERRMIN, _ERRMAX+1)
37
ce67eac10fc7 Allow global character encoding specification.
David Barts <n5jrn@me.com>
parents: 36
diff changeset
530 route = _TinCanErrorRoute(
ce67eac10fc7 Allow global character encoding specification.
David Barts <n5jrn@me.com>
parents: 36
diff changeset
531 ChameleonTemplate(source=self._template.body, encoding=self._encoding),
35
41da0b3d2156 Rename #include to #load (more descriptive).
David Barts <n5jrn@me.com>
parents: 34
diff changeset
532 self._loads, self._class)
3
c6902cded64d Corrections and reorg.
David Barts <n5jrn@me.com>
parents: 2
diff changeset
533 for error in errors:
c6902cded64d Corrections and reorg.
David Barts <n5jrn@me.com>
parents: 2
diff changeset
534 if error < _ERRMIN or error > _ERRMAX:
c6902cded64d Corrections and reorg.
David Barts <n5jrn@me.com>
parents: 2
diff changeset
535 raise TinCanError("{0}: bad #errors code".format(self._urlpath))
5
31bb8400e6e3 Add #end header, fix #errors.
David Barts <n5jrn@me.com>
parents: 4
diff changeset
536 self._app.error_handler[error] = route # XXX
3
c6902cded64d Corrections and reorg.
David Barts <n5jrn@me.com>
parents: 2
diff changeset
537
7
57ec65f527e9 Eliminate a stat() call, allow no code-behind on pages.
David Barts <n5jrn@me.com>
parents: 6
diff changeset
538 def _gettime(self, path):
57ec65f527e9 Eliminate a stat() call, allow no code-behind on pages.
David Barts <n5jrn@me.com>
parents: 6
diff changeset
539 try:
57ec65f527e9 Eliminate a stat() call, allow no code-behind on pages.
David Barts <n5jrn@me.com>
parents: 6
diff changeset
540 return os.stat(path).st_mtime
57ec65f527e9 Eliminate a stat() call, allow no code-behind on pages.
David Barts <n5jrn@me.com>
parents: 6
diff changeset
541 except FileNotFoundError:
57ec65f527e9 Eliminate a stat() call, allow no code-behind on pages.
David Barts <n5jrn@me.com>
parents: 6
diff changeset
542 return 0
8
9aaa91247b14 Fix minor buglet.
David Barts <n5jrn@me.com>
parents: 7
diff changeset
543 except OSError as e:
9
75e375b1976a Error pages now can have code-behind.
David Barts <n5jrn@me.com>
parents: 8
diff changeset
544 raise TinCanError(str(e)) from e
7
57ec65f527e9 Eliminate a stat() call, allow no code-behind on pages.
David Barts <n5jrn@me.com>
parents: 6
diff changeset
545
3
c6902cded64d Corrections and reorg.
David Barts <n5jrn@me.com>
parents: 2
diff changeset
546 def _getclass(self):
15
560c8fb55e4a Fix bugs in #python directive, make code-behind class loading simpler.
David Barts <n5jrn@me.com>
parents: 14
diff changeset
547 try:
560c8fb55e4a Fix bugs in #python directive, make code-behind class loading simpler.
David Barts <n5jrn@me.com>
parents: 14
diff changeset
548 pypath = os.path.normpath(os.path.join(self._fsroot, *self._splitpath(self._python)))
560c8fb55e4a Fix bugs in #python directive, make code-behind class loading simpler.
David Barts <n5jrn@me.com>
parents: 14
diff changeset
549 except IndexError as e:
560c8fb55e4a Fix bugs in #python directive, make code-behind class loading simpler.
David Barts <n5jrn@me.com>
parents: 14
diff changeset
550 raise TinCanError("{0}: invalid #python".format(self._urlpath)) from e
9
75e375b1976a Error pages now can have code-behind.
David Barts <n5jrn@me.com>
parents: 8
diff changeset
551 klass = ErrorPage if self._header.errors else Page
7
57ec65f527e9 Eliminate a stat() call, allow no code-behind on pages.
David Barts <n5jrn@me.com>
parents: 6
diff changeset
552 # Give 'em a default code-behind if they don't furnish one
57ec65f527e9 Eliminate a stat() call, allow no code-behind on pages.
David Barts <n5jrn@me.com>
parents: 6
diff changeset
553 pytime = self._gettime(pypath)
57ec65f527e9 Eliminate a stat() call, allow no code-behind on pages.
David Barts <n5jrn@me.com>
parents: 6
diff changeset
554 if not pytime:
15
560c8fb55e4a Fix bugs in #python directive, make code-behind class loading simpler.
David Barts <n5jrn@me.com>
parents: 14
diff changeset
555 if self._python_specified:
560c8fb55e4a Fix bugs in #python directive, make code-behind class loading simpler.
David Barts <n5jrn@me.com>
parents: 14
diff changeset
556 raise TinCanError("{0}: #python file not found".format(self._urlpath))
9
75e375b1976a Error pages now can have code-behind.
David Barts <n5jrn@me.com>
parents: 8
diff changeset
557 self._class = klass
7
57ec65f527e9 Eliminate a stat() call, allow no code-behind on pages.
David Barts <n5jrn@me.com>
parents: 6
diff changeset
558 return
57ec65f527e9 Eliminate a stat() call, allow no code-behind on pages.
David Barts <n5jrn@me.com>
parents: 6
diff changeset
559 # Else load the code-behind from a .py file
0
e726fafcffac For backup purposes, UNFINISHED!!
David Barts <n5jrn@me.com>
parents:
diff changeset
560 pycpath = pypath + 'c'
7
57ec65f527e9 Eliminate a stat() call, allow no code-behind on pages.
David Barts <n5jrn@me.com>
parents: 6
diff changeset
561 pyctime = self._gettime(pycpath)
0
e726fafcffac For backup purposes, UNFINISHED!!
David Barts <n5jrn@me.com>
parents:
diff changeset
562 try:
7
57ec65f527e9 Eliminate a stat() call, allow no code-behind on pages.
David Barts <n5jrn@me.com>
parents: 6
diff changeset
563 if pyctime < pytime:
4
0d47859f792a Finally got "hello, world" working. Still likely many bugs.
David Barts <n5jrn@me.com>
parents: 3
diff changeset
564 py_compile.compile(pypath, cfile=pycpath, doraise=True)
0d47859f792a Finally got "hello, world" working. Still likely many bugs.
David Barts <n5jrn@me.com>
parents: 3
diff changeset
565 except py_compile.PyCompileError as e:
0d47859f792a Finally got "hello, world" working. Still likely many bugs.
David Barts <n5jrn@me.com>
parents: 3
diff changeset
566 raise TinCanError(str(e)) from e
0d47859f792a Finally got "hello, world" working. Still likely many bugs.
David Barts <n5jrn@me.com>
parents: 3
diff changeset
567 except Exception as e:
0d47859f792a Finally got "hello, world" working. Still likely many bugs.
David Barts <n5jrn@me.com>
parents: 3
diff changeset
568 raise TinCanError("{0}: {1!s}".format(pypath, e)) from e
0d47859f792a Finally got "hello, world" working. Still likely many bugs.
David Barts <n5jrn@me.com>
parents: 3
diff changeset
569 try:
0d47859f792a Finally got "hello, world" working. Still likely many bugs.
David Barts <n5jrn@me.com>
parents: 3
diff changeset
570 spec = importlib.util.spec_from_file_location(_mangle(self._name), pycpath)
0
e726fafcffac For backup purposes, UNFINISHED!!
David Barts <n5jrn@me.com>
parents:
diff changeset
571 mod = importlib.util.module_from_spec(spec)
e726fafcffac For backup purposes, UNFINISHED!!
David Barts <n5jrn@me.com>
parents:
diff changeset
572 spec.loader.exec_module(mod)
e726fafcffac For backup purposes, UNFINISHED!!
David Barts <n5jrn@me.com>
parents:
diff changeset
573 except Exception as e:
16
448fc3d534f8 Improve error reportage.
David Barts <n5jrn@me.com>
parents: 15
diff changeset
574 raise TinCanError("{0}: error importing: {1!s}".format(pycpath, e)) from e
19
5d9a1b82251a Return the "deepest" subclass; this allows subclassing tincan.Page and
David Barts <n5jrn@me.com>
parents: 18
diff changeset
575 # Locate a suitable class. We look for the "deepest" class object
5d9a1b82251a Return the "deepest" subclass; this allows subclassing tincan.Page and
David Barts <n5jrn@me.com>
parents: 18
diff changeset
576 # we can find in the inheritance tree.
0
e726fafcffac For backup purposes, UNFINISHED!!
David Barts <n5jrn@me.com>
parents:
diff changeset
577 self._class = None
19
5d9a1b82251a Return the "deepest" subclass; this allows subclassing tincan.Page and
David Barts <n5jrn@me.com>
parents: 18
diff changeset
578 score = -1
5d9a1b82251a Return the "deepest" subclass; this allows subclassing tincan.Page and
David Barts <n5jrn@me.com>
parents: 18
diff changeset
579 ambig = False
0
e726fafcffac For backup purposes, UNFINISHED!!
David Barts <n5jrn@me.com>
parents:
diff changeset
580 for i in dir(mod):
e726fafcffac For backup purposes, UNFINISHED!!
David Barts <n5jrn@me.com>
parents:
diff changeset
581 v = getattr(mod, i)
19
5d9a1b82251a Return the "deepest" subclass; this allows subclassing tincan.Page and
David Barts <n5jrn@me.com>
parents: 18
diff changeset
582 if not isclass(v):
5d9a1b82251a Return the "deepest" subclass; this allows subclassing tincan.Page and
David Barts <n5jrn@me.com>
parents: 18
diff changeset
583 continue
5d9a1b82251a Return the "deepest" subclass; this allows subclassing tincan.Page and
David Barts <n5jrn@me.com>
parents: 18
diff changeset
584 d = self._cldepth(klass, v)
5d9a1b82251a Return the "deepest" subclass; this allows subclassing tincan.Page and
David Barts <n5jrn@me.com>
parents: 18
diff changeset
585 if d > score:
15
560c8fb55e4a Fix bugs in #python directive, make code-behind class loading simpler.
David Barts <n5jrn@me.com>
parents: 14
diff changeset
586 self._class = v
19
5d9a1b82251a Return the "deepest" subclass; this allows subclassing tincan.Page and
David Barts <n5jrn@me.com>
parents: 18
diff changeset
587 score = d
5d9a1b82251a Return the "deepest" subclass; this allows subclassing tincan.Page and
David Barts <n5jrn@me.com>
parents: 18
diff changeset
588 ambig = False
5d9a1b82251a Return the "deepest" subclass; this allows subclassing tincan.Page and
David Barts <n5jrn@me.com>
parents: 18
diff changeset
589 elif d == score:
5d9a1b82251a Return the "deepest" subclass; this allows subclassing tincan.Page and
David Barts <n5jrn@me.com>
parents: 18
diff changeset
590 ambig = True
3
c6902cded64d Corrections and reorg.
David Barts <n5jrn@me.com>
parents: 2
diff changeset
591 if self._class is None:
9
75e375b1976a Error pages now can have code-behind.
David Barts <n5jrn@me.com>
parents: 8
diff changeset
592 raise TinCanError("{0}: contains no {1} classes".format(pypath, klass.__name__))
19
5d9a1b82251a Return the "deepest" subclass; this allows subclassing tincan.Page and
David Barts <n5jrn@me.com>
parents: 18
diff changeset
593 if ambig:
5d9a1b82251a Return the "deepest" subclass; this allows subclassing tincan.Page and
David Barts <n5jrn@me.com>
parents: 18
diff changeset
594 raise TinCanError("{0}: contains ambiguous {1} classes".format(pypath, klass.__name__))
5d9a1b82251a Return the "deepest" subclass; this allows subclassing tincan.Page and
David Barts <n5jrn@me.com>
parents: 18
diff changeset
595
5d9a1b82251a Return the "deepest" subclass; this allows subclassing tincan.Page and
David Barts <n5jrn@me.com>
parents: 18
diff changeset
596 # This might fail for complex inheritance schemes from the classes of
5d9a1b82251a Return the "deepest" subclass; this allows subclassing tincan.Page and
David Barts <n5jrn@me.com>
parents: 18
diff changeset
597 # interest (so don't use them!).
5d9a1b82251a Return the "deepest" subclass; this allows subclassing tincan.Page and
David Barts <n5jrn@me.com>
parents: 18
diff changeset
598 def _cldepth(self, base, klass, count=0):
5d9a1b82251a Return the "deepest" subclass; this allows subclassing tincan.Page and
David Barts <n5jrn@me.com>
parents: 18
diff changeset
599 if klass is object:
5d9a1b82251a Return the "deepest" subclass; this allows subclassing tincan.Page and
David Barts <n5jrn@me.com>
parents: 18
diff changeset
600 # not found
5d9a1b82251a Return the "deepest" subclass; this allows subclassing tincan.Page and
David Barts <n5jrn@me.com>
parents: 18
diff changeset
601 return -1
5d9a1b82251a Return the "deepest" subclass; this allows subclassing tincan.Page and
David Barts <n5jrn@me.com>
parents: 18
diff changeset
602 elif klass is base:
5d9a1b82251a Return the "deepest" subclass; this allows subclassing tincan.Page and
David Barts <n5jrn@me.com>
parents: 18
diff changeset
603 # just found
5d9a1b82251a Return the "deepest" subclass; this allows subclassing tincan.Page and
David Barts <n5jrn@me.com>
parents: 18
diff changeset
604 return count
5d9a1b82251a Return the "deepest" subclass; this allows subclassing tincan.Page and
David Barts <n5jrn@me.com>
parents: 18
diff changeset
605 else:
5d9a1b82251a Return the "deepest" subclass; this allows subclassing tincan.Page and
David Barts <n5jrn@me.com>
parents: 18
diff changeset
606 # must recurse
5d9a1b82251a Return the "deepest" subclass; this allows subclassing tincan.Page and
David Barts <n5jrn@me.com>
parents: 18
diff changeset
607 for c in klass.__bases__:
5d9a1b82251a Return the "deepest" subclass; this allows subclassing tincan.Page and
David Barts <n5jrn@me.com>
parents: 18
diff changeset
608 result = self._cldepth(base, c, count=count+1)
5d9a1b82251a Return the "deepest" subclass; this allows subclassing tincan.Page and
David Barts <n5jrn@me.com>
parents: 18
diff changeset
609 if result > 0:
5d9a1b82251a Return the "deepest" subclass; this allows subclassing tincan.Page and
David Barts <n5jrn@me.com>
parents: 18
diff changeset
610 return result
5d9a1b82251a Return the "deepest" subclass; this allows subclassing tincan.Page and
David Barts <n5jrn@me.com>
parents: 18
diff changeset
611 return -1
0
e726fafcffac For backup purposes, UNFINISHED!!
David Barts <n5jrn@me.com>
parents:
diff changeset
612
e726fafcffac For backup purposes, UNFINISHED!!
David Barts <n5jrn@me.com>
parents:
diff changeset
613 def _redirect(self):
e726fafcffac For backup purposes, UNFINISHED!!
David Barts <n5jrn@me.com>
parents:
diff changeset
614 try:
e726fafcffac For backup purposes, UNFINISHED!!
David Barts <n5jrn@me.com>
parents:
diff changeset
615 rlist = self._splitpath(self._header.forward)
4
0d47859f792a Finally got "hello, world" working. Still likely many bugs.
David Barts <n5jrn@me.com>
parents: 3
diff changeset
616 forw = '/' + '/'.join(rlist)
11
8037bad7d5a8 Update documentation, fix some #forward bugs.
David Barts <n5jrn@me.com>
parents: 9
diff changeset
617 if forw in self._seen:
4
0d47859f792a Finally got "hello, world" working. Still likely many bugs.
David Barts <n5jrn@me.com>
parents: 3
diff changeset
618 raise TinCanError("{0}: #forward loop".format(self._origin))
0d47859f792a Finally got "hello, world" working. Still likely many bugs.
David Barts <n5jrn@me.com>
parents: 3
diff changeset
619 self._seen.add(forw)
0
e726fafcffac For backup purposes, UNFINISHED!!
David Barts <n5jrn@me.com>
parents:
diff changeset
620 rname = rlist.pop()
e726fafcffac For backup purposes, UNFINISHED!!
David Barts <n5jrn@me.com>
parents:
diff changeset
621 except IndexError as e:
e726fafcffac For backup purposes, UNFINISHED!!
David Barts <n5jrn@me.com>
parents:
diff changeset
622 raise TinCanError("{0}: invalid #forward".format(self._urlpath)) from e
11
8037bad7d5a8 Update documentation, fix some #forward bugs.
David Barts <n5jrn@me.com>
parents: 9
diff changeset
623 name, ext = os.path.splitext(rname)
2
ca6f8ca38cf2 Another backup commit.
David Barts <n5jrn@me.com>
parents: 1
diff changeset
624 if ext != _TEXTEN:
0
e726fafcffac For backup purposes, UNFINISHED!!
David Barts <n5jrn@me.com>
parents:
diff changeset
625 raise TinCanError("{0}: invalid #forward".format(self._urlpath))
e726fafcffac For backup purposes, UNFINISHED!!
David Barts <n5jrn@me.com>
parents:
diff changeset
626 self._subdir = rlist
2
ca6f8ca38cf2 Another backup commit.
David Barts <n5jrn@me.com>
parents: 1
diff changeset
627 self._python = name + _PEXTEN
0
e726fafcffac For backup purposes, UNFINISHED!!
David Barts <n5jrn@me.com>
parents:
diff changeset
628 self._fspath = os.path.join(self._fsroot, *self._subdir, rname)
12
496d43d551d2 More redirecting fixes and improved error reportage.
David Barts <n5jrn@me.com>
parents: 11
diff changeset
629 self._urlpath = '/' + self._urljoin(*self._subdir, rname)
0
e726fafcffac For backup purposes, UNFINISHED!!
David Barts <n5jrn@me.com>
parents:
diff changeset
630
e726fafcffac For backup purposes, UNFINISHED!!
David Barts <n5jrn@me.com>
parents:
diff changeset
631 def _urljoin(self, *args):
e726fafcffac For backup purposes, UNFINISHED!!
David Barts <n5jrn@me.com>
parents:
diff changeset
632 args = list(args)
e726fafcffac For backup purposes, UNFINISHED!!
David Barts <n5jrn@me.com>
parents:
diff changeset
633 if args[0] == '/':
e726fafcffac For backup purposes, UNFINISHED!!
David Barts <n5jrn@me.com>
parents:
diff changeset
634 args[0] = ''
e726fafcffac For backup purposes, UNFINISHED!!
David Barts <n5jrn@me.com>
parents:
diff changeset
635 return '/'.join(args)
e726fafcffac For backup purposes, UNFINISHED!!
David Barts <n5jrn@me.com>
parents:
diff changeset
636
1
94b36e721500 Another check in to back stuff up.
David Barts <n5jrn@me.com>
parents: 0
diff changeset
637 def __call__(self):
0
e726fafcffac For backup purposes, UNFINISHED!!
David Barts <n5jrn@me.com>
parents:
diff changeset
638 """
e726fafcffac For backup purposes, UNFINISHED!!
David Barts <n5jrn@me.com>
parents:
diff changeset
639 This gets called by the framework AFTER the page is launched.
e726fafcffac For backup purposes, UNFINISHED!!
David Barts <n5jrn@me.com>
parents:
diff changeset
640 """
1
94b36e721500 Another check in to back stuff up.
David Barts <n5jrn@me.com>
parents: 0
diff changeset
641 target = None
94b36e721500 Another check in to back stuff up.
David Barts <n5jrn@me.com>
parents: 0
diff changeset
642 try:
17
8186de188daf Improve the run-time error handling in code-behinds.
David Barts <n5jrn@me.com>
parents: 16
diff changeset
643 obj = self._class(bottle.request, bottle.response)
1
94b36e721500 Another check in to back stuff up.
David Barts <n5jrn@me.com>
parents: 0
diff changeset
644 obj.handle()
35
41da0b3d2156 Rename #include to #load (more descriptive).
David Barts <n5jrn@me.com>
parents: 34
diff changeset
645 tvars = self._loads.copy()
29
2e3ac3d7b0a4 A possible workaround for the drainbamage (needs testing)?
David Barts <n5jrn@me.com>
parents: 26
diff changeset
646 tvars.update(obj.export())
36
4ed261056057 Put old newline logic back.
David Barts <n5jrn@me.com>
parents: 35
diff changeset
647 return self._body.render(tvars).lstrip('\n')
1
94b36e721500 Another check in to back stuff up.
David Barts <n5jrn@me.com>
parents: 0
diff changeset
648 except ForwardException as fwd:
94b36e721500 Another check in to back stuff up.
David Barts <n5jrn@me.com>
parents: 0
diff changeset
649 target = fwd.target
17
8186de188daf Improve the run-time error handling in code-behinds.
David Barts <n5jrn@me.com>
parents: 16
diff changeset
650 except bottle.HTTPResponse as e:
8186de188daf Improve the run-time error handling in code-behinds.
David Barts <n5jrn@me.com>
parents: 16
diff changeset
651 return e
8186de188daf Improve the run-time error handling in code-behinds.
David Barts <n5jrn@me.com>
parents: 16
diff changeset
652 except Exception as e:
8186de188daf Improve the run-time error handling in code-behinds.
David Barts <n5jrn@me.com>
parents: 16
diff changeset
653 traceback.print_exc()
8186de188daf Improve the run-time error handling in code-behinds.
David Barts <n5jrn@me.com>
parents: 16
diff changeset
654 raise bottle.HTTPError(status=500, exception=e)
1
94b36e721500 Another check in to back stuff up.
David Barts <n5jrn@me.com>
parents: 0
diff changeset
655 if target is None:
17
8186de188daf Improve the run-time error handling in code-behinds.
David Barts <n5jrn@me.com>
parents: 16
diff changeset
656 message = "{0}: unexpected null target".format(self._urlpath)
8186de188daf Improve the run-time error handling in code-behinds.
David Barts <n5jrn@me.com>
parents: 16
diff changeset
657 sys.stderr.write(message + '\n')
8186de188daf Improve the run-time error handling in code-behinds.
David Barts <n5jrn@me.com>
parents: 16
diff changeset
658 raise bottle.HTTPError(status=500, exception=TinCanError(message))
1
94b36e721500 Another check in to back stuff up.
David Barts <n5jrn@me.com>
parents: 0
diff changeset
659 # We get here if we are doing a server-side programmatic
94b36e721500 Another check in to back stuff up.
David Barts <n5jrn@me.com>
parents: 0
diff changeset
660 # forward.
94b36e721500 Another check in to back stuff up.
David Barts <n5jrn@me.com>
parents: 0
diff changeset
661 environ = bottle.request.environ
94b36e721500 Another check in to back stuff up.
David Barts <n5jrn@me.com>
parents: 0
diff changeset
662 if _FORIG not in environ:
94b36e721500 Another check in to back stuff up.
David Barts <n5jrn@me.com>
parents: 0
diff changeset
663 environ[_FORIG] = self._urlpath
2
ca6f8ca38cf2 Another backup commit.
David Barts <n5jrn@me.com>
parents: 1
diff changeset
664 if _FLOOP not in environ:
ca6f8ca38cf2 Another backup commit.
David Barts <n5jrn@me.com>
parents: 1
diff changeset
665 environ[_FLOOP] = set([self._urlpath])
1
94b36e721500 Another check in to back stuff up.
David Barts <n5jrn@me.com>
parents: 0
diff changeset
666 elif target in environ[_FLOOP]:
17
8186de188daf Improve the run-time error handling in code-behinds.
David Barts <n5jrn@me.com>
parents: 16
diff changeset
667 message = "{0}: forward loop detected".format(environ[_FORIG])
8186de188daf Improve the run-time error handling in code-behinds.
David Barts <n5jrn@me.com>
parents: 16
diff changeset
668 sys.stderr.write(message + '\n')
8186de188daf Improve the run-time error handling in code-behinds.
David Barts <n5jrn@me.com>
parents: 16
diff changeset
669 raise bottle.HTTPError(status=500, exception=TinCanError(message))
1
94b36e721500 Another check in to back stuff up.
David Barts <n5jrn@me.com>
parents: 0
diff changeset
670 environ[_FLOOP].add(target)
94b36e721500 Another check in to back stuff up.
David Barts <n5jrn@me.com>
parents: 0
diff changeset
671 environ['bottle.raw_path'] = target
94b36e721500 Another check in to back stuff up.
David Barts <n5jrn@me.com>
parents: 0
diff changeset
672 environ['PATH_INFO'] = urllib.parse.quote(target)
94b36e721500 Another check in to back stuff up.
David Barts <n5jrn@me.com>
parents: 0
diff changeset
673 route, args = self._app.router.match(environ)
94b36e721500 Another check in to back stuff up.
David Barts <n5jrn@me.com>
parents: 0
diff changeset
674 environ['route.handle'] = environ['bottle.route'] = route
94b36e721500 Another check in to back stuff up.
David Barts <n5jrn@me.com>
parents: 0
diff changeset
675 environ['route.url_args'] = args
94b36e721500 Another check in to back stuff up.
David Barts <n5jrn@me.com>
parents: 0
diff changeset
676 return route.call(**args)
0
e726fafcffac For backup purposes, UNFINISHED!!
David Barts <n5jrn@me.com>
parents:
diff changeset
677
2
ca6f8ca38cf2 Another backup commit.
David Barts <n5jrn@me.com>
parents: 1
diff changeset
678 # L a u n c h e r
ca6f8ca38cf2 Another backup commit.
David Barts <n5jrn@me.com>
parents: 1
diff changeset
679
ca6f8ca38cf2 Another backup commit.
David Barts <n5jrn@me.com>
parents: 1
diff changeset
680 _WINF = "WEB-INF"
ca6f8ca38cf2 Another backup commit.
David Barts <n5jrn@me.com>
parents: 1
diff changeset
681 _BANNED = set([_WINF])
37
ce67eac10fc7 Allow global character encoding specification.
David Barts <n5jrn@me.com>
parents: 36
diff changeset
682 ENCODING = "utf-8"
2
ca6f8ca38cf2 Another backup commit.
David Barts <n5jrn@me.com>
parents: 1
diff changeset
683
ca6f8ca38cf2 Another backup commit.
David Barts <n5jrn@me.com>
parents: 1
diff changeset
684 class _Launcher(object):
ca6f8ca38cf2 Another backup commit.
David Barts <n5jrn@me.com>
parents: 1
diff changeset
685 """
ca6f8ca38cf2 Another backup commit.
David Barts <n5jrn@me.com>
parents: 1
diff changeset
686 Helper class for launching webapps.
ca6f8ca38cf2 Another backup commit.
David Barts <n5jrn@me.com>
parents: 1
diff changeset
687 """
32
3382799f3905 Refinements.
David Barts <n5jrn@me.com>
parents: 31
diff changeset
688 def __init__(self, fsroot, urlroot, logger):
2
ca6f8ca38cf2 Another backup commit.
David Barts <n5jrn@me.com>
parents: 1
diff changeset
689 """
ca6f8ca38cf2 Another backup commit.
David Barts <n5jrn@me.com>
parents: 1
diff changeset
690 Lightweight constructor. The real action happens in .launch() below.
ca6f8ca38cf2 Another backup commit.
David Barts <n5jrn@me.com>
parents: 1
diff changeset
691 """
ca6f8ca38cf2 Another backup commit.
David Barts <n5jrn@me.com>
parents: 1
diff changeset
692 self.fsroot = fsroot
ca6f8ca38cf2 Another backup commit.
David Barts <n5jrn@me.com>
parents: 1
diff changeset
693 self.urlroot = urlroot
4
0d47859f792a Finally got "hello, world" working. Still likely many bugs.
David Barts <n5jrn@me.com>
parents: 3
diff changeset
694 self.logger = logger
2
ca6f8ca38cf2 Another backup commit.
David Barts <n5jrn@me.com>
parents: 1
diff changeset
695 self.app = None
4
0d47859f792a Finally got "hello, world" working. Still likely many bugs.
David Barts <n5jrn@me.com>
parents: 3
diff changeset
696 self.errors = 0
0d47859f792a Finally got "hello, world" working. Still likely many bugs.
David Barts <n5jrn@me.com>
parents: 3
diff changeset
697 self.debug = False
37
ce67eac10fc7 Allow global character encoding specification.
David Barts <n5jrn@me.com>
parents: 36
diff changeset
698 self.encoding = ENCODING
2
ca6f8ca38cf2 Another backup commit.
David Barts <n5jrn@me.com>
parents: 1
diff changeset
699
ca6f8ca38cf2 Another backup commit.
David Barts <n5jrn@me.com>
parents: 1
diff changeset
700 def launch(self):
ca6f8ca38cf2 Another backup commit.
David Barts <n5jrn@me.com>
parents: 1
diff changeset
701 """
ca6f8ca38cf2 Another backup commit.
David Barts <n5jrn@me.com>
parents: 1
diff changeset
702 Does the actual work of launching something. XXX - modifies sys.path
ca6f8ca38cf2 Another backup commit.
David Barts <n5jrn@me.com>
parents: 1
diff changeset
703 and never un-modifies it.
ca6f8ca38cf2 Another backup commit.
David Barts <n5jrn@me.com>
parents: 1
diff changeset
704 """
ca6f8ca38cf2 Another backup commit.
David Barts <n5jrn@me.com>
parents: 1
diff changeset
705 # Sanity checks
ca6f8ca38cf2 Another backup commit.
David Barts <n5jrn@me.com>
parents: 1
diff changeset
706 if not self.urlroot.startswith("/"):
18
e88ab99914cf More improvements to the error reportage.
David Barts <n5jrn@me.com>
parents: 17
diff changeset
707 self.errors = 1
e88ab99914cf More improvements to the error reportage.
David Barts <n5jrn@me.com>
parents: 17
diff changeset
708 self.logger("urlroot not absolute: {0!r}".format(self.urlroot))
e88ab99914cf More improvements to the error reportage.
David Barts <n5jrn@me.com>
parents: 17
diff changeset
709 return self
2
ca6f8ca38cf2 Another backup commit.
David Barts <n5jrn@me.com>
parents: 1
diff changeset
710 if not os.path.isdir(self.fsroot):
18
e88ab99914cf More improvements to the error reportage.
David Barts <n5jrn@me.com>
parents: 17
diff changeset
711 self.errors = 1
e88ab99914cf More improvements to the error reportage.
David Barts <n5jrn@me.com>
parents: 17
diff changeset
712 self.logger("no such directory: {0!r}".format(self.fsroot))
e88ab99914cf More improvements to the error reportage.
David Barts <n5jrn@me.com>
parents: 17
diff changeset
713 return self
e88ab99914cf More improvements to the error reportage.
David Barts <n5jrn@me.com>
parents: 17
diff changeset
714 # Make any needed directories. Refuse to launch things that don't
e88ab99914cf More improvements to the error reportage.
David Barts <n5jrn@me.com>
parents: 17
diff changeset
715 # contain WEB-INF, to prevent accidental launches of undesired
e88ab99914cf More improvements to the error reportage.
David Barts <n5jrn@me.com>
parents: 17
diff changeset
716 # directory trees containing sensitive files.
2
ca6f8ca38cf2 Another backup commit.
David Barts <n5jrn@me.com>
parents: 1
diff changeset
717 winf = os.path.join(self.fsroot, _WINF)
18
e88ab99914cf More improvements to the error reportage.
David Barts <n5jrn@me.com>
parents: 17
diff changeset
718 if not os.path.isdir(winf):
e88ab99914cf More improvements to the error reportage.
David Barts <n5jrn@me.com>
parents: 17
diff changeset
719 self.errors = 1
e88ab99914cf More improvements to the error reportage.
David Barts <n5jrn@me.com>
parents: 17
diff changeset
720 self.logger("no WEB-INF directory in {0!r}".format(self.fsroot))
e88ab99914cf More improvements to the error reportage.
David Barts <n5jrn@me.com>
parents: 17
diff changeset
721 return self
2
ca6f8ca38cf2 Another backup commit.
David Barts <n5jrn@me.com>
parents: 1
diff changeset
722 lib = os.path.join(winf, "lib")
18
e88ab99914cf More improvements to the error reportage.
David Barts <n5jrn@me.com>
parents: 17
diff changeset
723 for i in [ lib ]:
2
ca6f8ca38cf2 Another backup commit.
David Barts <n5jrn@me.com>
parents: 1
diff changeset
724 if not os.path.isdir(i):
ca6f8ca38cf2 Another backup commit.
David Barts <n5jrn@me.com>
parents: 1
diff changeset
725 os.mkdir(i)
ca6f8ca38cf2 Another backup commit.
David Barts <n5jrn@me.com>
parents: 1
diff changeset
726 # Add our private lib directory to sys.path
ca6f8ca38cf2 Another backup commit.
David Barts <n5jrn@me.com>
parents: 1
diff changeset
727 sys.path.insert(1, os.path.abspath(lib))
ca6f8ca38cf2 Another backup commit.
David Barts <n5jrn@me.com>
parents: 1
diff changeset
728 # Do what we gotta do
ca6f8ca38cf2 Another backup commit.
David Barts <n5jrn@me.com>
parents: 1
diff changeset
729 self.app = TinCan()
ca6f8ca38cf2 Another backup commit.
David Barts <n5jrn@me.com>
parents: 1
diff changeset
730 self._launch([])
4
0d47859f792a Finally got "hello, world" working. Still likely many bugs.
David Barts <n5jrn@me.com>
parents: 3
diff changeset
731 return self
2
ca6f8ca38cf2 Another backup commit.
David Barts <n5jrn@me.com>
parents: 1
diff changeset
732
ca6f8ca38cf2 Another backup commit.
David Barts <n5jrn@me.com>
parents: 1
diff changeset
733 def _launch(self, subdir):
ca6f8ca38cf2 Another backup commit.
David Barts <n5jrn@me.com>
parents: 1
diff changeset
734 for entry in os.listdir(os.path.join(self.fsroot, *subdir)):
ca6f8ca38cf2 Another backup commit.
David Barts <n5jrn@me.com>
parents: 1
diff changeset
735 if not subdir and entry in _BANNED:
ca6f8ca38cf2 Another backup commit.
David Barts <n5jrn@me.com>
parents: 1
diff changeset
736 continue
ca6f8ca38cf2 Another backup commit.
David Barts <n5jrn@me.com>
parents: 1
diff changeset
737 etype = os.stat(os.path.join(self.fsroot, *subdir, entry)).st_mode
ca6f8ca38cf2 Another backup commit.
David Barts <n5jrn@me.com>
parents: 1
diff changeset
738 if S_ISREG(etype):
ca6f8ca38cf2 Another backup commit.
David Barts <n5jrn@me.com>
parents: 1
diff changeset
739 ename, eext = os.path.splitext(entry)
ca6f8ca38cf2 Another backup commit.
David Barts <n5jrn@me.com>
parents: 1
diff changeset
740 if eext != _TEXTEN:
ca6f8ca38cf2 Another backup commit.
David Barts <n5jrn@me.com>
parents: 1
diff changeset
741 continue # only look at interesting files
4
0d47859f792a Finally got "hello, world" working. Still likely many bugs.
David Barts <n5jrn@me.com>
parents: 3
diff changeset
742 route = _TinCanRoute(self, ename, subdir)
0d47859f792a Finally got "hello, world" working. Still likely many bugs.
David Barts <n5jrn@me.com>
parents: 3
diff changeset
743 try:
0d47859f792a Finally got "hello, world" working. Still likely many bugs.
David Barts <n5jrn@me.com>
parents: 3
diff changeset
744 route.launch()
0d47859f792a Finally got "hello, world" working. Still likely many bugs.
David Barts <n5jrn@me.com>
parents: 3
diff changeset
745 except TinCanError as e:
0d47859f792a Finally got "hello, world" working. Still likely many bugs.
David Barts <n5jrn@me.com>
parents: 3
diff changeset
746 self.logger(str(e))
0d47859f792a Finally got "hello, world" working. Still likely many bugs.
David Barts <n5jrn@me.com>
parents: 3
diff changeset
747 if self.debug:
0d47859f792a Finally got "hello, world" working. Still likely many bugs.
David Barts <n5jrn@me.com>
parents: 3
diff changeset
748 while e.__cause__ != None:
0d47859f792a Finally got "hello, world" working. Still likely many bugs.
David Barts <n5jrn@me.com>
parents: 3
diff changeset
749 e = e.__cause__
0d47859f792a Finally got "hello, world" working. Still likely many bugs.
David Barts <n5jrn@me.com>
parents: 3
diff changeset
750 self.logger("\t{0}: {1!s}".format(e.__class__.__name__, e))
0d47859f792a Finally got "hello, world" working. Still likely many bugs.
David Barts <n5jrn@me.com>
parents: 3
diff changeset
751 self.errors += 1
2
ca6f8ca38cf2 Another backup commit.
David Barts <n5jrn@me.com>
parents: 1
diff changeset
752 elif S_ISDIR(etype):
ca6f8ca38cf2 Another backup commit.
David Barts <n5jrn@me.com>
parents: 1
diff changeset
753 self._launch(subdir + [entry])
ca6f8ca38cf2 Another backup commit.
David Barts <n5jrn@me.com>
parents: 1
diff changeset
754
4
0d47859f792a Finally got "hello, world" working. Still likely many bugs.
David Barts <n5jrn@me.com>
parents: 3
diff changeset
755 def _logger(message):
0d47859f792a Finally got "hello, world" working. Still likely many bugs.
David Barts <n5jrn@me.com>
parents: 3
diff changeset
756 sys.stderr.write(message)
0d47859f792a Finally got "hello, world" working. Still likely many bugs.
David Barts <n5jrn@me.com>
parents: 3
diff changeset
757 sys.stderr.write('\n')
0d47859f792a Finally got "hello, world" working. Still likely many bugs.
David Barts <n5jrn@me.com>
parents: 3
diff changeset
758
37
ce67eac10fc7 Allow global character encoding specification.
David Barts <n5jrn@me.com>
parents: 36
diff changeset
759 def launch(fsroot=None, urlroot='/', logger=_logger, debug=False, encoding=ENCODING):
2
ca6f8ca38cf2 Another backup commit.
David Barts <n5jrn@me.com>
parents: 1
diff changeset
760 """
ca6f8ca38cf2 Another backup commit.
David Barts <n5jrn@me.com>
parents: 1
diff changeset
761 Launch and return a TinCan webapp. Does not run the app; it is the
ca6f8ca38cf2 Another backup commit.
David Barts <n5jrn@me.com>
parents: 1
diff changeset
762 caller's responsibility to call app.run()
ca6f8ca38cf2 Another backup commit.
David Barts <n5jrn@me.com>
parents: 1
diff changeset
763 """
ca6f8ca38cf2 Another backup commit.
David Barts <n5jrn@me.com>
parents: 1
diff changeset
764 if fsroot is None:
ca6f8ca38cf2 Another backup commit.
David Barts <n5jrn@me.com>
parents: 1
diff changeset
765 fsroot = os.getcwd()
32
3382799f3905 Refinements.
David Barts <n5jrn@me.com>
parents: 31
diff changeset
766 launcher = _Launcher(fsroot, urlroot, logger)
25
e93e5e746cc5 Preliminary debugging, still not fully tested.
David Barts <n5jrn@me.com>
parents: 24
diff changeset
767 launcher.debug = debug
37
ce67eac10fc7 Allow global character encoding specification.
David Barts <n5jrn@me.com>
parents: 36
diff changeset
768 launcher.encoding = encoding
4
0d47859f792a Finally got "hello, world" working. Still likely many bugs.
David Barts <n5jrn@me.com>
parents: 3
diff changeset
769 launcher.launch()
0d47859f792a Finally got "hello, world" working. Still likely many bugs.
David Barts <n5jrn@me.com>
parents: 3
diff changeset
770 return launcher.app, launcher.errors
0d47859f792a Finally got "hello, world" working. Still likely many bugs.
David Barts <n5jrn@me.com>
parents: 3
diff changeset
771
0d47859f792a Finally got "hello, world" working. Still likely many bugs.
David Barts <n5jrn@me.com>
parents: 3
diff changeset
772 # XXX - We cannot implement a command-line launcher here; see the
0d47859f792a Finally got "hello, world" working. Still likely many bugs.
David Barts <n5jrn@me.com>
parents: 3
diff changeset
773 # launcher script for why.