Mercurial > hg > FileServer
annotate fileserver/web.py @ 31:f00fcf6d9f1d
test not modified response
| author | Jeff Hammel <jhammel@mozilla.com> |
|---|---|
| date | Mon, 05 Mar 2012 13:49:07 -0800 |
| parents | 395c6744bcd9 |
| children | 0edb831061f5 |
| rev | line source |
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| 0 | 1 #!/usr/bin/env python |
| 2 | |
| 3 """ | |
| 4 WSGI app for FileServer | |
| 5 | |
| 6 Reference: | |
| 7 - http://docs.webob.org/en/latest/file-example.html | |
| 8 """ | |
| 9 | |
| 10 import mimetypes | |
| 1 | 11 import optparse |
| 0 | 12 import os |
| 1 | 13 import sys |
| 0 | 14 from webob import Request, Response, exc |
| 1 | 15 from wsgiref.simple_server import make_server |
| 16 | |
| 20 | 17 __all__ = ['get_mimetype', 'file_response', 'FileApp', 'DirectoryServer', 'main'] |
| 0 | 18 |
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19 ### classes for iterating over files |
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20 |
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21 class FileIterable(object): |
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22 def __init__(self, filename): |
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23 self.filename = filename |
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24 def __iter__(self): |
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25 return FileIterator(self.filename) |
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26 class FileIterator(object): |
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27 def __init__(self, filename, chunk_size=4096): |
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28 self.filename = filename |
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29 self.chunk_size = chunk_size |
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30 self.fileobj = open(self.filename, 'rb') |
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31 def __iter__(self): |
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32 return self |
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33 def next(self): |
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34 chunk = self.fileobj.read(self.chunk_size) |
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35 if not chunk: |
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36 raise StopIteration |
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37 return chunk |
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38 __next__ = next # py3 compat |
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39 |
| 0 | 40 def get_mimetype(filename): |
| 41 type, encoding = mimetypes.guess_type(filename) | |
| 42 # We'll ignore encoding, even though we shouldn't really | |
| 43 return type or 'application/octet-stream' | |
| 44 | |
| 45 def file_response(filename): | |
| 20 | 46 """return a webob response object appropriate to a file name""" |
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47 res = Response(content_type=get_mimetype(filename), |
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48 conditional_response=True) |
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49 res.app_iter = FileIterable(filename) |
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50 res.content_length = os.path.getsize(filename) |
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51 res.last_modified = os.path.getmtime(filename) |
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52 res.etag = '%s-%s-%s' % (os.path.getmtime(filename), |
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53 os.path.getsize(filename), hash(filename)) |
| 0 | 54 return res |
| 55 | |
| 56 class FileApp(object): | |
| 57 """ | |
| 58 serve static files | |
| 59 """ | |
| 60 | |
| 61 def __init__(self, filename): | |
| 62 self.filename = filename | |
| 63 | |
| 64 def __call__(self, environ, start_response): | |
| 65 res = file_response(self.filename) | |
| 66 return res(environ, start_response) | |
| 67 | |
| 68 class DirectoryServer(object): | |
| 69 | |
| 24 | 70 def __init__(self, directory, sort=True): |
| 0 | 71 assert os.path.exists(directory), "'%s' does not exist" % directory |
| 72 assert os.path.isdir(directory), "'%s' is not a directory" % directory | |
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73 self.directory = self.normpath(directory) |
| 24 | 74 self.sort = sort |
| 0 | 75 |
| 76 @staticmethod | |
| 77 def normpath(path): | |
| 78 return os.path.normcase(os.path.abspath(path)) | |
| 79 | |
| 17 | 80 def check_path(self, path): |
| 81 """ | |
| 82 if under the root directory, returns the full path | |
| 83 otherwise, returns None | |
| 84 """ | |
| 85 path = self.normpath(path) | |
| 86 if path == self.directory or path.startswith(self.directory + os.path.sep): | |
| 87 return path | |
| 88 | |
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89 def index(self, directory): |
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90 """ |
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91 generate a directory listing for a given directory |
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92 """ |
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93 parts = ['<html><head><title>Simple Index</title></head><body>'] |
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94 listings = os.listdir(directory) |
| 24 | 95 if self.sort: |
| 96 listings.sort() | |
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97 listings = [(os.path.isdir(os.path.join(directory, entry)) and entry + '/' or entry, entry) |
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98 for entry in listings] |
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99 for link, entry in listings: |
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100 parts.append('<a href="%s">%s</a><br/>' % (link, entry)) |
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101 parts.append('</body></html>') |
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102 return '\n'.join(parts) |
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103 |
| 0 | 104 def __call__(self, environ, start_response): |
| 105 request = Request(environ) | |
| 106 # TODO method_not_allowed: Allow: GET, HEAD | |
| 107 path_info = request.path_info | |
| 108 if not path_info: | |
| 13 | 109 response = exc.HTTPMovedPermanently(add_slash=True) |
| 110 return response(environ, start_response) | |
| 17 | 111 full = self.check_path(os.path.join(self.directory, path_info.strip('/'))) |
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112 |
| 17 | 113 if full is None: |
| 0 | 114 # Out of bounds |
| 115 return exc.HTTPNotFound()(environ, start_response) | |
| 116 if not os.path.exists(full): | |
| 117 return exc.HTTPNotFound()(environ, start_response) | |
| 118 | |
| 119 if os.path.isdir(full): | |
| 120 # serve directory index | |
| 121 if not path_info.endswith('/'): | |
| 12 | 122 response = exc.HTTPMovedPermanently(add_slash=True) |
| 123 return response(environ, start_response) | |
| 0 | 124 index = self.index(full) |
| 125 response = Response(index, content_type='text/html') | |
| 126 return response(environ, start_response) | |
| 127 | |
| 128 # serve file | |
| 129 if path_info.endswith('/'): | |
| 130 # we create the `full` filename above by stripping off | |
| 131 # '/' from both sides; so we correct here | |
| 132 return exc.HTTPNotFound()(environ, start_response) | |
| 133 response = file_response(full) | |
| 134 return response(environ, start_response) | |
| 135 | |
| 1 | 136 def main(args=sys.argv[1:]): |
| 137 | |
| 138 # parse command line arguments | |
| 139 usage = '%prog [options] directory' | |
| 140 class PlainDescriptionFormatter(optparse.IndentedHelpFormatter): | |
| 141 """description formatter""" | |
| 142 def format_description(self, description): | |
| 143 if description: | |
| 144 return description + '\n' | |
| 145 else: | |
| 146 return '' | |
| 147 parser = optparse.OptionParser(usage=usage, description=__doc__, formatter=PlainDescriptionFormatter()) | |
| 148 parser.add_option('-p', '--port', dest='port', | |
| 149 type='int', default=9999, | |
| 150 help='port [DEFAULT: %default]') | |
| 151 parser.add_option('-H', '--host', dest='host', default='0.0.0.0', | |
| 152 help='host [DEFAULT: %default]') | |
| 153 options, args = parser.parse_args(args) | |
| 154 | |
| 155 # get the directory | |
| 156 if not len(args) == 1: | |
| 157 parser.print_help() | |
| 158 sys.exit(1) | |
| 159 directory = args[0] | |
| 160 if not os.path.exists(directory): | |
| 161 parser.error("'%s' not found" % directory) | |
| 162 if not os.path.isdir(directory): | |
| 163 parser.error("'%s' not a directory" % directory) | |
| 164 | |
| 165 # serve | |
| 166 app = DirectoryServer(directory) | |
| 167 try: | |
| 168 print 'http://%s:%s/' % (options.host, options.port) | |
| 169 make_server(options.host, options.port, app).serve_forever() | |
| 170 except KeyboardInterrupt, ki: | |
| 171 print "Cio, baby!" | |
| 172 except BaseException, e: | |
| 173 sys.exit("Problem initializing server: %s" % e) | |
| 174 | |
| 0 | 175 if __name__ == '__main__': |
| 1 | 176 main() |