08ae38b6ce 2010-06-25 1: #!/usr/bin/env python3.1
08ae38b6ce 2010-06-25 2:
e7b837a681 2010-08-25 3: import datetime, http.cookiejar, os, sys, shelve, spacemap, re, urllib.request
e7b837a681 2010-08-25 4:
e7b837a681 2010-08-25 5: class Config:
e7b837a681 2010-08-25 6: __slots__ = frozenset(['_config', '_default', '_section', 'options', 'root'])
e7b837a681 2010-08-25 7: _default = {
e7b837a681 2010-08-25 8: 'general': {
e7b837a681 2010-08-25 9: 'port': '8008',
e7b837a681 2010-08-25 10: },
e7b837a681 2010-08-25 11: '_other': {
e7b837a681 2010-08-25 12: 'verbose': 'no',
e7b837a681 2010-08-25 13: 'noetag': 'no',
e7b837a681 2010-08-25 14: 'noparts': 'no',
cab908195f 2010-09-06 15: 'strip': '',
cab908195f 2010-09-06 16: 'sub': '',
e7b837a681 2010-08-25 17: },}
e7b837a681 2010-08-25 18:
e7b837a681 2010-08-25 19: # function to read in config file
e7b837a681 2010-08-25 20: def __init__(self):
e7b837a681 2010-08-25 21: import configparser, optparse
e7b837a681 2010-08-25 22:
e7b837a681 2010-08-25 23: parser = optparse.OptionParser()
e7b837a681 2010-08-25 24: parser.add_option('-c', '--config', dest = 'config', help = 'config file location', metavar = 'FILE', default = 'samesite.conf')
e7b837a681 2010-08-25 25: (self.options, args) = parser.parse_args()
e7b837a681 2010-08-25 26:
e7b837a681 2010-08-25 27: assert os.access(self.options.config, os.R_OK), "Fatal error: can't read {}".format(self.options.config)
e7b837a681 2010-08-25 28:
e7b837a681 2010-08-25 29: configDir = re.compile('^(.*)/[^/]+$').match(self.options.config)
e7b837a681 2010-08-25 30: if configDir:
e7b837a681 2010-08-25 31: self.root = configDir.group(1)
e7b837a681 2010-08-25 32: else:
e7b837a681 2010-08-25 33: self.root = os.getcwd()
e7b837a681 2010-08-25 34:
e7b837a681 2010-08-25 35: self._config = configparser.ConfigParser()
e7b837a681 2010-08-25 36: self._config.readfp(open(self.options.config))
e7b837a681 2010-08-25 37:
e7b837a681 2010-08-25 38: for section in self._config.sections():
e7b837a681 2010-08-25 39: if section != 'general':
e7b837a681 2010-08-25 40: if self._config.has_option(section, 'dir'):
e7b837a681 2010-08-25 41: if re.compile('^/$').match(self._config.get(section, 'dir')):
e7b837a681 2010-08-25 42: self._config.set(section, 'dir', self.root + os.sep + section)
e7b837a681 2010-08-25 43: thisDir = re.compile('^(.*)/$').match(self._config.get(section, 'dir'))
e7b837a681 2010-08-25 44: if thisDir:
e7b837a681 2010-08-25 45: self._config.set(section, 'dir', thisDir.group(1))
e7b837a681 2010-08-25 46: if not re.compile('^/(.*)$').match(self._config.get(section, 'dir')):
e7b837a681 2010-08-25 47: self._config.set(section, 'dir', self.root + os.sep + self._config.get(section, 'dir'))
e7b837a681 2010-08-25 48: else:
e7b837a681 2010-08-25 49: self._config.set(section, 'dir', self.root + os.sep + section)
e7b837a681 2010-08-25 50:
e7b837a681 2010-08-25 51: if not self._config.has_option(section, 'root'):
e7b837a681 2010-08-25 52: self._config.set(section, 'root', section)
e7b837a681 2010-08-25 53:
e7b837a681 2010-08-25 54: # function to select config file section or create one
e7b837a681 2010-08-25 55: def section(self, section):
e7b837a681 2010-08-25 56: if not self._config.has_section(section):
e7b837a681 2010-08-25 57: self._config.add_section(section)
e7b837a681 2010-08-25 58: self._section = section
e7b837a681 2010-08-25 59:
e7b837a681 2010-08-25 60: # function to get config parameter, if parameter doesn't exists the default
e7b837a681 2010-08-25 61: # value or None is substituted
e7b837a681 2010-08-25 62: def __getitem__(self, name):
e7b837a681 2010-08-25 63: if not self._config.has_option(self._section, name):
e7b837a681 2010-08-25 64: if self._section in self._default:
e7b837a681 2010-08-25 65: if name in self._default[self._section]:
e7b837a681 2010-08-25 66: self._config.set(self._section, name, self._default[self._section][name])
e7b837a681 2010-08-25 67: else:
e7b837a681 2010-08-25 68: self._config.set(self._section, name, None)
e7b837a681 2010-08-25 69: elif name in self._default['_other']:
e7b837a681 2010-08-25 70: self._config.set(self._section, name, self._default['_other'][name])
e7b837a681 2010-08-25 71: else:
e7b837a681 2010-08-25 72: self._config.set(self._section, name, None)
e7b837a681 2010-08-25 73: return(self._config.get(self._section, name))
e7b837a681 2010-08-25 74:
e7b837a681 2010-08-25 75: config = Config()
e7b837a681 2010-08-25 76:
e7b837a681 2010-08-25 77: #assert options.port or os.access(options.log, os.R_OK), 'Log file unreadable'
e7b837a681 2010-08-25 78:
cab908195f 2010-09-06 79: const_desc_fields = set(['Content-Length', 'Last-Modified', 'Pragma'])
cab908195f 2010-09-06 80: const_ignore_fields = set([
cab908195f 2010-09-06 81: 'Accept-Ranges', 'Age',
cab908195f 2010-09-06 82: 'Cache-Control', 'Connection', 'Content-Type',
cab908195f 2010-09-06 83: 'Date',
cab908195f 2010-09-06 84: 'Expires',
cab908195f 2010-09-06 85: 'Server',
cab908195f 2010-09-06 86: 'Via',
cab908195f 2010-09-06 87: 'X-Cache', 'X-Cache-Lookup', 'X-Powered-By'
cab908195f 2010-09-06 88: ])
e7b837a681 2010-08-25 89:
e7b837a681 2010-08-25 90: block_size = 4096
80f8e3804a 2010-08-20 91:
80f8e3804a 2010-08-20 92: '''
80f8e3804a 2010-08-20 93: # later, kqueue would be good but later
80f8e3804a 2010-08-20 94: class Connection:
80f8e3804a 2010-08-20 95: __slots__ = frozenset(('__address', '__input', '__socket', '__status', 'error', 'method', 'url', 'http_version'))
80f8e3804a 2010-08-20 96:
80f8e3804a 2010-08-20 97: def __init__(self, socket, address):
80f8e3804a 2010-08-20 98: self.__address = address
80f8e3804a 2010-08-20 99: self.__input = b''
80f8e3804a 2010-08-20 100: self.__socket = socket
80f8e3804a 2010-08-20 101: self.__status = 0
80f8e3804a 2010-08-20 102:
80f8e3804a 2010-08-20 103: def read(self, kev):
80f8e3804a 2010-08-20 104: buffer = self.__socket.recv(kev.data)
80f8e3804a 2010-08-20 105: exhausted = False
80f8e3804a 2010-08-20 106: if len(buffer) == 0:
80f8e3804a 2010-08-20 107: eof = True
80f8e3804a 2010-08-20 108: else:
80f8e3804a 2010-08-20 109: self.__input += buffer
80f8e3804a 2010-08-20 110: while not exhausted:
80f8e3804a 2010-08-20 111: if self.__status == -1:
80f8e3804a 2010-08-20 112: exhausted = True
80f8e3804a 2010-08-20 113: elif self.__status == 0:
80f8e3804a 2010-08-20 114: endstring = self.__input.find(b'\n')
80f8e3804a 2010-08-20 115: if endstring > 0:
80f8e3804a 2010-08-20 116: print('Processing request line.')
80f8e3804a 2010-08-20 117: line = self.__input[:endstring].decode('ascii')
80f8e3804a 2010-08-20 118: self.__input = self.__input[endstring + 1:]
80f8e3804a 2010-08-20 119: isRequest = re.compile('(GET) ([^ ]+) HTTP/(1\.0)').match(line)
80f8e3804a 2010-08-20 120: if not isRequest:
80f8e3804a 2010-08-20 121: self.error = 'Not a HTTP connection.'
80f8e3804a 2010-08-20 122: self.__status = -1
80f8e3804a 2010-08-20 123: else:
80f8e3804a 2010-08-20 124: self.method = isRequest.group(1)
80f8e3804a 2010-08-20 125: self.url = isRequest.group(2)
80f8e3804a 2010-08-20 126: self.http_version = isRequest.group(3)
80f8e3804a 2010-08-20 127: self.__status = 1
80f8e3804a 2010-08-20 128: else:
80f8e3804a 2010-08-20 129: exhausted = True
80f8e3804a 2010-08-20 130: elif self.__status == 1:
80f8e3804a 2010-08-20 131: endstring = self.__input.find(b'\n')
80f8e3804a 2010-08-20 132: if endstring > 0:
80f8e3804a 2010-08-20 133: print('Processing header line.' + repr(self.__input))
80f8e3804a 2010-08-20 134: line = self.__input[:endstring].decode('ascii')
80f8e3804a 2010-08-20 135: self.__input = self.__input[endstring + 1:]
80f8e3804a 2010-08-20 136: isHeader = re.compile('([^:]*): +(.*)').match(line)
80f8e3804a 2010-08-20 137: if not isHeader:
80f8e3804a 2010-08-20 138: self.error = 'Bad header.'
80f8e3804a 2010-08-20 139: return(False)
80f8e3804a 2010-08-20 140: # process header here
80f8e3804a 2010-08-20 141: elif endstring == 0:
80f8e3804a 2010-08-20 142: self.__status = 2
80f8e3804a 2010-08-20 143: else:
80f8e3804a 2010-08-20 144: exhausted = True
80f8e3804a 2010-08-20 145:
80f8e3804a 2010-08-20 146: def write(self, kev):
80f8e3804a 2010-08-20 147: pass
80f8e3804a 2010-08-20 148:
80f8e3804a 2010-08-20 149: if options.port:
80f8e3804a 2010-08-20 150: import select, socket
80f8e3804a 2010-08-20 151:
80f8e3804a 2010-08-20 152: sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
80f8e3804a 2010-08-20 153: try:
80f8e3804a 2010-08-20 154: sock.bind(('127.0.0.1', int(options.port)))
80f8e3804a 2010-08-20 155: sock.listen(-1)
80f8e3804a 2010-08-20 156:
80f8e3804a 2010-08-20 157: kq = select.kqueue()
80f8e3804a 2010-08-20 158: assert kq.fileno() != -1, "Fatal error: can't initialise kqueue."
80f8e3804a 2010-08-20 159:
80f8e3804a 2010-08-20 160: kq.control([select.kevent(sock, select.KQ_FILTER_READ, select.KQ_EV_ADD)], 0)
80f8e3804a 2010-08-20 161: timeout = None
80f8e3804a 2010-08-20 162:
80f8e3804a 2010-08-20 163: connections = {sock.fileno(): None}
80f8e3804a 2010-08-20 164:
80f8e3804a 2010-08-20 165: while True:
80f8e3804a 2010-08-20 166: kevs = kq.control(None, 1, timeout)
80f8e3804a 2010-08-20 167:
80f8e3804a 2010-08-20 168: for kev in kevs:
80f8e3804a 2010-08-20 169: if type(connections[kev.ident]) == Connection:
80f8e3804a 2010-08-20 170: print(kev.ident, kev.data, kev.filter, kev.flags)
80f8e3804a 2010-08-20 171: assert kev.data != 0, 'No data available.'
80f8e3804a 2010-08-20 172: if kev.filter == select.KQ_FILTER_READ:
80f8e3804a 2010-08-20 173: connections[kev.ident].read(kev)
80f8e3804a 2010-08-20 174: elif kev.filter == select.KQ_FILTER_WRITE:
80f8e3804a 2010-08-20 175: connections[kev.ident].write(kev)
80f8e3804a 2010-08-20 176: else:
80f8e3804a 2010-08-20 177: assert kev.filter in (select.KQ_FILTER_READ, select.KQ_FILTER_WRITE), 'Do we support other filters?'
80f8e3804a 2010-08-20 178: else:
80f8e3804a 2010-08-20 179: (conn, addr) = sock.accept()
80f8e3804a 2010-08-20 180: print('Connection from ' + repr(addr))
80f8e3804a 2010-08-20 181: kq.control([select.kevent(conn, select.KQ_FILTER_READ, select.KQ_EV_ADD)], 0)
80f8e3804a 2010-08-20 182: connections[conn.fileno()] = Connection(conn, addr)
80f8e3804a 2010-08-20 183:
80f8e3804a 2010-08-20 184: if kev.flags >> 15 == 1:
80f8e3804a 2010-08-20 185: kq.control([select.kevent(kev.ident, select.KQ_FILTER_READ, select.KQ_EV_DELETE)], 0)
80f8e3804a 2010-08-20 186: kq.control([select.kevent(kev.ident, select.KQ_FILTER_WRITE, select.KQ_EV_DELETE)], 0)
80f8e3804a 2010-08-20 187: del(connections[kev.ident])
80f8e3804a 2010-08-20 188: finally:
80f8e3804a 2010-08-20 189: sock.close()
80f8e3804a 2010-08-20 190: '''
80f8e3804a 2010-08-20 191:
e7b837a681 2010-08-25 192: # XXX how about rechecking files?
e7b837a681 2010-08-25 193: if True:
80f8e3804a 2010-08-20 194: import http.server
80f8e3804a 2010-08-20 195:
80f8e3804a 2010-08-20 196: class MyRequestHandler(http.server.BaseHTTPRequestHandler):
80f8e3804a 2010-08-20 197: def __process(self):
80f8e3804a 2010-08-20 198: # reload means file needs to be reloaded to serve request
80f8e3804a 2010-08-20 199: reload = False
80f8e3804a 2010-08-20 200: # recheck means file needs to be checked, this also means that if file hav been modified we can serve older copy
80f8e3804a 2010-08-20 201: recheck = False
80f8e3804a 2010-08-20 202: # file_stat means file definitely exists
80f8e3804a 2010-08-20 203: file_stat = None
80f8e3804a 2010-08-20 204: # requested_ranges holds data about any range requested
80f8e3804a 2010-08-20 205: requested_ranges = None
80f8e3804a 2010-08-20 206: # records holds data from index locally, should be written back upon successfull completion
80f8e3804a 2010-08-20 207: record = None
d0071bdbc7 2010-08-20 208:
d0071bdbc7 2010-08-20 209: myPath = re.compile('^(.*?)(\?.*)$').match(self.path)
d0071bdbc7 2010-08-20 210: if myPath:
d0071bdbc7 2010-08-20 211: my_path = myPath.group(1)
d0071bdbc7 2010-08-20 212: else:
d0071bdbc7 2010-08-20 213: my_path = self.path
d0071bdbc7 2010-08-20 214:
e7b837a681 2010-08-25 215: config.section(self.headers['Host'])
cab908195f 2010-09-06 216:
cab908195f 2010-09-06 217: if config['sub'] != None and config['strip'] != None and len(config['strip']) > 0:
cab908195f 2010-09-06 218: string = re.compile(config['strip']).sub(config['sub'], my_path)
cab908195f 2010-09-06 219: my_path = string
cab908195f 2010-09-06 220:
cab908195f 2010-09-06 221: info = 'Checking file: ' + my_path
e7b837a681 2010-08-25 222:
e7b837a681 2010-08-25 223: if not os.access(config['dir'], os.X_OK):
e7b837a681 2010-08-25 224: os.mkdir(config['dir'])
e7b837a681 2010-08-25 225: # this is file index - everything is stored in this file
e7b837a681 2010-08-25 226: # _parts - list of stored parts of file
e7b837a681 2010-08-25 227: # _time - last time the file was checked
e7b837a681 2010-08-25 228: # everything else is just the headers
e7b837a681 2010-08-25 229: index = shelve.open(config['dir'] + os.sep + '.index')
e7b837a681 2010-08-25 230:
e7b837a681 2010-08-25 231: desc_fields = const_desc_fields.copy()
e7b837a681 2010-08-25 232: ignore_fields = const_ignore_fields.copy()
e7b837a681 2010-08-25 233: if not config['noetag']:
e7b837a681 2010-08-25 234: desc_fields.add('ETag')
e7b837a681 2010-08-25 235: else:
e7b837a681 2010-08-25 236: ignore_fields.add('ETag')
e7b837a681 2010-08-25 237:
cab908195f 2010-09-06 238: proxy_ignored = set([
cab908195f 2010-09-06 239: 'Accept', 'Accept-Charset', 'Accept-Encoding', 'Accept-Language',
cab908195f 2010-09-06 240: 'Cache-Control', 'Connection', 'Content-Length', 'Cookie',
80f8e3804a 2010-08-20 241: 'Host',
fb10031536 2010-08-21 242: 'If-Modified-Since', 'If-Unmodified-Since',
cab908195f 2010-09-06 243: 'Referer',
80f8e3804a 2010-08-20 244: 'User-Agent',
80f8e3804a 2010-08-20 245: 'Via',
cab908195f 2010-09-06 246: 'X-Forwarded-For', 'X-REMOVED',
cab908195f 2010-09-06 247: ])
80f8e3804a 2010-08-20 248:
fb10031536 2010-08-21 249: print('===============[ {} request ]==='.format(self.command))
80f8e3804a 2010-08-20 250:
80f8e3804a 2010-08-20 251: for header in self.headers:
80f8e3804a 2010-08-20 252: if header in proxy_ignored:
80f8e3804a 2010-08-20 253: pass
80f8e3804a 2010-08-20 254: elif header in ('Range'):
80f8e3804a 2010-08-20 255: isRange = re.compile('bytes=(\d+)-(\d+)').match(self.headers[header])
80f8e3804a 2010-08-20 256: if isRange:
e7b837a681 2010-08-25 257: requested_ranges = spacemap.SpaceMap({int(isRange.group(1)): int(isRange.group(2)) + 1})
80f8e3804a 2010-08-20 258: else:
80f8e3804a 2010-08-20 259: return()
e7b837a681 2010-08-25 260: elif header in ('Pragma'):
e7b837a681 2010-08-25 261: if my_path in index:
e7b837a681 2010-08-25 262: index[my_path][header] = self.headers[header]
80f8e3804a 2010-08-20 263: else:
80f8e3804a 2010-08-20 264: print('Unknown header - ', header, ': ', self.headers[header], sep='')
80f8e3804a 2010-08-20 265: return()
80f8e3804a 2010-08-20 266: print(header, self.headers[header])
e7b837a681 2010-08-25 267:
b0975a28fb 2010-08-26 268: # creating file name from my_path
b0975a28fb 2010-08-26 269: file_name = config['dir'] + os.sep + re.compile('%20').sub(' ', my_path)
b0975a28fb 2010-08-26 270: # partial file or unfinished download
b0975a28fb 2010-08-26 271: temp_name = config['dir'] + os.sep + '.parts' + re.compile('%20').sub(' ', my_path)
b0975a28fb 2010-08-26 272:
80f8e3804a 2010-08-20 273: # creating empty placeholder in index
80f8e3804a 2010-08-20 274: # if there's no space map and there's no file in real directory - we have no file
80f8e3804a 2010-08-20 275: # if there's an empty space map - file is full
80f8e3804a 2010-08-20 276: # space map generally covers every bit of file we don't posess currently
d0071bdbc7 2010-08-20 277: if not my_path in index:
80f8e3804a 2010-08-20 278: info += '\nThis one is new.'
80f8e3804a 2010-08-20 279: reload = True
e7b837a681 2010-08-25 280: record = {}
80f8e3804a 2010-08-20 281: else:
b0975a28fb 2010-08-26 282: # forcibly checking file if no file present
b0975a28fb 2010-08-26 283: if os.access(file_name, os.R_OK):
b0975a28fb 2010-08-26 284: file_stat = os.stat(file_name)
b0975a28fb 2010-08-26 285: elif '_parts' in index[my_path] and os.access(temp_name, os.R_OK):
b0975a28fb 2010-08-26 286: file_stat = os.stat(temp_name)
b0975a28fb 2010-08-26 287: else:
b0975a28fb 2010-08-26 288: info += '\nFile not found or inaccessible.'
b0975a28fb 2010-08-26 289: index[my_path]['_parts'] = None
b0975a28fb 2010-08-26 290: reload = True
d0071bdbc7 2010-08-20 291: record = index[my_path]
e7b837a681 2010-08-25 292:
e7b837a681 2010-08-25 293: if not '_parts' in record:
e7b837a681 2010-08-25 294: record['_parts'] = None
e7b837a681 2010-08-25 295:
b0975a28fb 2010-08-26 296: if record['_parts'] == None:
b0975a28fb 2010-08-26 297: recheck = True
80f8e3804a 2010-08-20 298:
80f8e3804a 2010-08-20 299: # forcibly checking file if file size doesn't match with index data
80f8e3804a 2010-08-20 300: if not reload:
e7b837a681 2010-08-25 301: if '_parts' in record and record['_parts'] == spacemap.SpaceMap():
80f8e3804a 2010-08-20 302: if 'Content-Length' in record and file_stat and file_stat.st_size != int(record['Content-Length']):
80f8e3804a 2010-08-20 303: info += '\nFile size is {} and stored file size is {}.'.format(file_stat.st_size, record['Content-Length'])
b0975a28fb 2010-08-26 304: record['_parts'] = None
80f8e3804a 2010-08-20 305: reload = True
80f8e3804a 2010-08-20 306:
80f8e3804a 2010-08-20 307: # forcibly checking file if index holds Pragma header
80f8e3804a 2010-08-20 308: if not reload and 'Pragma' in record and record['Pragma'] == 'no-cache':
80f8e3804a 2010-08-20 309: info +='\nPragma on: recheck imminent.'
80f8e3804a 2010-08-20 310: recheck = True
80f8e3804a 2010-08-20 311:
80f8e3804a 2010-08-20 312: # skipping file processing if there's no need to recheck it and we have checked it at least 4 hours ago
80f8e3804a 2010-08-20 313: if not recheck and not reload and '_time' in record and (datetime.datetime.now() - datetime.timedelta(hours = 4) - record['_time']).days < 0:
80f8e3804a 2010-08-20 314: recheck = True
80f8e3804a 2010-08-20 315:
80f8e3804a 2010-08-20 316: print(info)
80f8e3804a 2010-08-20 317: if reload or recheck:
80f8e3804a 2010-08-20 318:
80f8e3804a 2010-08-20 319: try:
cab908195f 2010-09-06 320: request = 'http://' + config['root'] + self.path
cab908195f 2010-09-06 321: my_headers = {}
cab908195f 2010-09-06 322: for header in ('Cache-Control', 'Cookie', 'Referer', 'User-Agent'):
cab908195f 2010-09-06 323: if header in self.headers:
cab908195f 2010-09-06 324: my_headers[header] = self.headers[header]
cab908195f 2010-09-06 325:
fb10031536 2010-08-21 326: needed = None
e7b837a681 2010-08-25 327: # XXX and if we specify full file we don't go partial?
80f8e3804a 2010-08-20 328: if requested_ranges != None:
80f8e3804a 2010-08-20 329: if '_parts' in record and record['_parts'] != None:
b0975a28fb 2010-08-26 330: if config['noparts']:
b0975a28fb 2010-08-26 331: needed = record['_parts']
b0975a28fb 2010-08-26 332: else:
b0975a28fb 2010-08-26 333: needed = record['_parts'] | requested_ranges
b0975a28fb 2010-08-26 334: elif not config['noparts']:
80f8e3804a 2010-08-20 335: needed = requested_ranges
80f8e3804a 2010-08-20 336: ranges = ()
fb10031536 2010-08-21 337: print('Missing ranges: {}, requested ranges: {}, needed ranges: {}.'.format(record['_parts'], requested_ranges, needed))
b0975a28fb 2010-08-26 338: if needed != None and len(needed) > 0:
fb10031536 2010-08-21 339: needed.rewind()
fb10031536 2010-08-21 340: while True:
fb10031536 2010-08-21 341: range = needed.pop()
fb10031536 2010-08-21 342: if range[0] == None:
fb10031536 2010-08-21 343: break
fb10031536 2010-08-21 344: ranges += '{}-{}'.format(range[0], range[1] - 1),
cab908195f 2010-09-06 345: my_headers['Range'] = 'bytes=' + ','.join(ranges)
cab908195f 2010-09-06 346:
cab908195f 2010-09-06 347: request = urllib.request.Request(request, headers = my_headers)
80f8e3804a 2010-08-20 348:
80f8e3804a 2010-08-20 349: with urllib.request.urlopen(request) as source:
80f8e3804a 2010-08-20 350: new_record = {}
80f8e3804a 2010-08-20 351: new_record['_parts'] = record['_parts']
80f8e3804a 2010-08-20 352: headers = source.info()
80f8e3804a 2010-08-20 353:
80f8e3804a 2010-08-20 354: # stripping unneeded headers (XXX make this inplace?)
80f8e3804a 2010-08-20 355: for header in headers:
80f8e3804a 2010-08-20 356: if header in desc_fields:
80f8e3804a 2010-08-20 357: #if header == 'Pragma' and headers[header] != 'no-cache':
80f8e3804a 2010-08-20 358: if header == 'Content-Length':
80f8e3804a 2010-08-20 359: if 'Content-Range' not in headers:
fb10031536 2010-08-21 360: new_record[header] = int(headers[header])
80f8e3804a 2010-08-20 361: else:
80f8e3804a 2010-08-20 362: new_record[header] = headers[header]
80f8e3804a 2010-08-20 363: elif header == 'Content-Range':
80f8e3804a 2010-08-20 364: range = re.compile('^bytes (\d+)-(\d+)/(\d+)$').match(headers[header])
80f8e3804a 2010-08-20 365: if range:
fb10031536 2010-08-21 366: new_record['Content-Length'] = int(range.group(3))
80f8e3804a 2010-08-20 367: else:
80f8e3804a 2010-08-20 368: assert False, 'Content-Range unrecognized.'
80f8e3804a 2010-08-20 369: elif not header in ignore_fields:
80f8e3804a 2010-08-20 370: print('Undefined header "', header, '": ', headers[header], sep='')
80f8e3804a 2010-08-20 371:
80f8e3804a 2010-08-20 372: # comparing headers with data found in index
80f8e3804a 2010-08-20 373: # if any header has changed (except Pragma) file is fully downloaded
80f8e3804a 2010-08-20 374: # same if we get more or less headers
80f8e3804a 2010-08-20 375: old_keys = set(record.keys())
80f8e3804a 2010-08-20 376: old_keys.discard('_time')
80f8e3804a 2010-08-20 377: old_keys.discard('Pragma')
80f8e3804a 2010-08-20 378: more_keys = set(new_record.keys()) - old_keys
80f8e3804a 2010-08-20 379: more_keys.discard('Pragma')
80f8e3804a 2010-08-20 380: less_keys = old_keys - set(new_record.keys())
80f8e3804a 2010-08-20 381: if len(more_keys) > 0:
80f8e3804a 2010-08-20 382: if not len(old_keys) == 0:
80f8e3804a 2010-08-20 383: print('More headers appear:', more_keys)
80f8e3804a 2010-08-20 384: reload = True
80f8e3804a 2010-08-20 385: elif len(less_keys) > 0:
80f8e3804a 2010-08-20 386: print('Less headers appear:', less_keys)
80f8e3804a 2010-08-20 387: else:
80f8e3804a 2010-08-20 388: for key in record.keys():
80f8e3804a 2010-08-20 389: if key[0] != '_' and key != 'Pragma' and not record[key] == new_record[key]:
80f8e3804a 2010-08-20 390: print('Header "', key, '" changed from [', record[key], '] to [', new_record[key], ']', sep='')
fb10031536 2010-08-21 391: print(type(record[key]), type(new_record[key]))
80f8e3804a 2010-08-20 392: reload = True
80f8e3804a 2010-08-20 393:
80f8e3804a 2010-08-20 394: if reload:
80f8e3804a 2010-08-20 395: print('Reloading.')
80f8e3804a 2010-08-20 396: if os.access(temp_name, os.R_OK):
80f8e3804a 2010-08-20 397: os.unlink(temp_name)
80f8e3804a 2010-08-20 398: if os.access(file_name, os.R_OK):
80f8e3804a 2010-08-20 399: os.unlink(file_name)
e7b837a681 2010-08-25 400: new_record['_parts'] = spacemap.SpaceMap({0: int(new_record['Content-Length'])})
fb10031536 2010-08-21 401: print(new_record)
80f8e3804a 2010-08-20 402:
80f8e3804a 2010-08-20 403: # downloading file or segment
80f8e3804a 2010-08-20 404: if 'Content-Length' in new_record:
fb10031536 2010-08-21 405: if needed == None:
fb10031536 2010-08-21 406: needed = new_record['_parts']
80f8e3804a 2010-08-20 407: else:
fb10031536 2010-08-21 408: if len(needed) > 1:
80f8e3804a 2010-08-20 409: print("Multipart requests currently not supported.")
80f8e3804a 2010-08-20 410: assert False, 'Skip this one for now.'
80f8e3804a 2010-08-20 411: else:
80f8e3804a 2010-08-20 412: assert False, 'No Content-Length or Content-Range header.'
80f8e3804a 2010-08-20 413:
fb10031536 2010-08-21 414: new_record['_time'] = datetime.datetime.now()
fb10031536 2010-08-21 415: if self.command not in ('HEAD'):
fb10031536 2010-08-21 416: # file is created at temporary location and moved in place only when download completes
fb10031536 2010-08-21 417: if not os.access(temp_name, os.R_OK):
e7b837a681 2010-08-25 418: empty_name = config['dir'] + os.sep + '.tmp'
fb10031536 2010-08-21 419: with open(empty_name, 'w+b') as some_file:
fb10031536 2010-08-21 420: pass
fb10031536 2010-08-21 421: os.renames(empty_name, temp_name)
fb10031536 2010-08-21 422: temp_file = open(temp_name, 'r+b')
fb10031536 2010-08-21 423: needed.rewind()
fb10031536 2010-08-21 424: while True:
fb10031536 2010-08-21 425: (start, end) = needed.pop()
fb10031536 2010-08-21 426: if start == None:
fb10031536 2010-08-21 427: break
fb10031536 2010-08-21 428: stream_last = start
fb10031536 2010-08-21 429: old_record = new_record
fb10031536 2010-08-21 430: if end - start < block_size:
fb10031536 2010-08-21 431: req_block_size = end - start
fb10031536 2010-08-21 432: else:
fb10031536 2010-08-21 433: req_block_size = block_size
fb10031536 2010-08-21 434: buffer = source.read(req_block_size)
fb10031536 2010-08-21 435: length = len(buffer)
fb10031536 2010-08-21 436: while length > 0 and stream_last < end:
fb10031536 2010-08-21 437: stream_pos = stream_last + length
fb10031536 2010-08-21 438: assert not stream_pos > end, 'Received more data then requested: pos:{} start:{} end:{}.'.format(stream_pos, start, end)
fb10031536 2010-08-21 439: temp_file.seek(stream_last)
fb10031536 2010-08-21 440: temp_file.write(buffer)
e7b837a681 2010-08-25 441: new_record['_parts'] = new_record['_parts'] - spacemap.SpaceMap({stream_last: stream_pos})
fb10031536 2010-08-21 442: index[my_path] = old_record
fb10031536 2010-08-21 443: index.sync()
fb10031536 2010-08-21 444: old_record = new_record
fb10031536 2010-08-21 445: stream_last = stream_pos
fb10031536 2010-08-21 446: if end - stream_last < block_size:
fb10031536 2010-08-21 447: req_block_size = end - stream_last
fb10031536 2010-08-21 448: buffer = source.read(req_block_size)
fb10031536 2010-08-21 449: length = len(buffer)
fb10031536 2010-08-21 450: # moving downloaded data to real file
fb10031536 2010-08-21 451: temp_file.close()
fb10031536 2010-08-21 452:
fb10031536 2010-08-21 453: print(new_record)
fb10031536 2010-08-21 454: index[my_path] = new_record
fb10031536 2010-08-21 455: index.sync()
80f8e3804a 2010-08-20 456:
80f8e3804a 2010-08-20 457: except urllib.error.HTTPError as error:
80f8e3804a 2010-08-20 458: # in case of error we don't need to do anything actually,
80f8e3804a 2010-08-20 459: # if file download stalls or fails the file would not be moved to it's location
80f8e3804a 2010-08-20 460: print(error)
e7b837a681 2010-08-25 461:
cab908195f 2010-09-06 462: if not os.access(file_name, os.R_OK) and os.access(temp_name, os.R_OK) and '_parts' in index[my_path] and index[my_path]['_parts'] == spacemap.SpaceMap():
e7b837a681 2010-08-25 463: # just moving
e7b837a681 2010-08-25 464: # drop old dirs XXX
e7b837a681 2010-08-25 465: print('Moving temporary file to new destination.')
e7b837a681 2010-08-25 466: os.renames(temp_name, file_name)
cab908195f 2010-09-06 467:
cab908195f 2010-09-06 468: if not my_path in index:
cab908195f 2010-09-06 469: self.send_response(502)
cab908195f 2010-09-06 470: self.end_headers()
cab908195f 2010-09-06 471: return
fb10031536 2010-08-21 472:
80f8e3804a 2010-08-20 473: if self.command == 'HEAD':
80f8e3804a 2010-08-20 474: self.send_response(200)
d0071bdbc7 2010-08-20 475: if 'Content-Length' in index[my_path]:
d0071bdbc7 2010-08-20 476: self.send_header('Content-Length', index[my_path]['Content-Length'])
80f8e3804a 2010-08-20 477: self.send_header('Accept-Ranges', 'bytes')
80f8e3804a 2010-08-20 478: self.send_header('Content-Type', 'application/octet-stream')
d0071bdbc7 2010-08-20 479: if 'Last-Modified' in index[my_path]:
d0071bdbc7 2010-08-20 480: self.send_header('Last-Modified', index[my_path]['Last-Modified'])
80f8e3804a 2010-08-20 481: self.end_headers()
80f8e3804a 2010-08-20 482: else:
e7b837a681 2010-08-25 483: if ('_parts' in index[my_path] and index[my_path]['_parts'] != spacemap.SpaceMap()) or not os.access(file_name, os.R_OK):
80f8e3804a 2010-08-20 484: file_name = temp_name
80f8e3804a 2010-08-20 485:
80f8e3804a 2010-08-20 486: with open(file_name, 'rb') as real_file:
80f8e3804a 2010-08-20 487: file_stat = os.stat(file_name)
fb10031536 2010-08-21 488: if 'Range' in self.headers:
fb10031536 2010-08-21 489: self.send_response(206)
80f8e3804a 2010-08-20 490: ranges = ()
80f8e3804a 2010-08-20 491: requested_ranges.rewind()
80f8e3804a 2010-08-20 492: while True:
80f8e3804a 2010-08-20 493: pair = requested_ranges.pop()
80f8e3804a 2010-08-20 494: if pair[0] == None:
80f8e3804a 2010-08-20 495: break
80f8e3804a 2010-08-20 496: ranges += '{}-{}'.format(pair[0], str(pair[1] - 1)),
fb10031536 2010-08-21 497: self.send_header('Content-Range', 'bytes {}/{}'.format(','.join(ranges), index[my_path]['Content-Length']))
80f8e3804a 2010-08-20 498: else:
fb10031536 2010-08-21 499: self.send_response(200)
80f8e3804a 2010-08-20 500: self.send_header('Content-Length', str(file_stat.st_size))
e7b837a681 2010-08-25 501: requested_ranges = spacemap.SpaceMap({0: file_stat.st_size})
cab908195f 2010-09-06 502: if 'Last-Modified' in index[my_path]:
cab908195f 2010-09-06 503: self.send_header('Last-Modified', index[my_path]['Last-Modified'])
80f8e3804a 2010-08-20 504: self.send_header('Content-Type', 'application/octet-stream')
80f8e3804a 2010-08-20 505: self.end_headers()
80f8e3804a 2010-08-20 506: if self.command in ('GET'):
fb10031536 2010-08-21 507: if len(requested_ranges) > 0:
fb10031536 2010-08-21 508: requested_ranges.rewind()
fb10031536 2010-08-21 509: (start, end) = requested_ranges.pop()
fb10031536 2010-08-21 510: else:
fb10031536 2010-08-21 511: start = 0
fb10031536 2010-08-21 512: end = index[my_path]['Content-Length']
80f8e3804a 2010-08-20 513: real_file.seek(start)
80f8e3804a 2010-08-20 514: if block_size > end - start:
80f8e3804a 2010-08-20 515: req_block_size = end - start
80f8e3804a 2010-08-20 516: else:
80f8e3804a 2010-08-20 517: req_block_size = block_size
80f8e3804a 2010-08-20 518: buffer = real_file.read(req_block_size)
80f8e3804a 2010-08-20 519: length = len(buffer)
80f8e3804a 2010-08-20 520: while length > 0:
80f8e3804a 2010-08-20 521: self.wfile.write(buffer)
80f8e3804a 2010-08-20 522: start += len(buffer)
80f8e3804a 2010-08-20 523: if req_block_size > end - start:
80f8e3804a 2010-08-20 524: req_block_size = end - start
80f8e3804a 2010-08-20 525: if req_block_size == 0:
80f8e3804a 2010-08-20 526: break
80f8e3804a 2010-08-20 527: buffer = real_file.read(req_block_size)
80f8e3804a 2010-08-20 528: length = len(buffer)
80f8e3804a 2010-08-20 529:
80f8e3804a 2010-08-20 530: def do_HEAD(self):
80f8e3804a 2010-08-20 531: return self.__process()
80f8e3804a 2010-08-20 532: def do_GET(self):
80f8e3804a 2010-08-20 533: return self.__process()
80f8e3804a 2010-08-20 534:
e7b837a681 2010-08-25 535: config.section('general')
e7b837a681 2010-08-25 536: server = http.server.HTTPServer(('127.0.0.1', int(config['port'])), MyRequestHandler)
80f8e3804a 2010-08-20 537: server.serve_forever()
80f8e3804a 2010-08-20 538:
80f8e3804a 2010-08-20 539: else:
80f8e3804a 2010-08-20 540: while True:
80f8e3804a 2010-08-20 541: unchecked_files = set()
80f8e3804a 2010-08-20 542: checked_files = 0
80f8e3804a 2010-08-20 543:
80f8e3804a 2010-08-20 544: # reading log and storing found urls for processing
80f8e3804a 2010-08-20 545: # check file mtime XXX
80f8e3804a 2010-08-20 546: with open(options.log, 'r') as log_file:
80f8e3804a 2010-08-20 547: log_line = re.compile('^[^ ]+ - - \[.*] "(GET|HEAD) (.*?)(\?.*)? HTTP/1.1" (\d+) \d+ "(.*)" "(.*)"$')
80f8e3804a 2010-08-20 548: for line in log_file:
80f8e3804a 2010-08-20 549: this_line = log_line.match(line.strip())
80f8e3804a 2010-08-20 550: if this_line:
80f8e3804a 2010-08-20 551: unchecked_files.add(this_line.group(2))
80f8e3804a 2010-08-20 552:
80f8e3804a 2010-08-20 553: for url in unchecked_files:
80f8e3804a 2010-08-20 554: reload = False
80f8e3804a 2010-08-20 555: recheck = False
80f8e3804a 2010-08-20 556: info = 'Checking file: ' + url
80f8e3804a 2010-08-20 557:
80f8e3804a 2010-08-20 558: # creating empty placeholder in index
80f8e3804a 2010-08-20 559: if not url in index:
80f8e3804a 2010-08-20 560: info += '\nThis one is new.'
80f8e3804a 2010-08-20 561: index[url] = {}
80f8e3804a 2010-08-20 562: reload = True
80f8e3804a 2010-08-20 563:
80f8e3804a 2010-08-20 564: # creating file name from url
80f8e3804a 2010-08-20 565: file_name = options.dir + re.compile('%20').sub(' ', url)
80f8e3804a 2010-08-20 566:
80f8e3804a 2010-08-20 567: # forcibly checking file if no file present
80f8e3804a 2010-08-20 568: if not reload and not os.access(file_name, os.R_OK):
80f8e3804a 2010-08-20 569: info += '\nFile not found or inaccessible.'
80f8e3804a 2010-08-20 570: reload = True
80f8e3804a 2010-08-20 571:
80f8e3804a 2010-08-20 572: # forcibly checking file if file size doesn't match with index data
80f8e3804a 2010-08-20 573: elif not reload and 'Content-Length' in index[url] and os.stat(file_name).st_size != int(index[url]['Content-Length']):
80f8e3804a 2010-08-20 574: info += '\nFile size is ' + os.stat(file_name).st_size + ' and stored file size is ' + index[url]['Content-Length'] + '.'
80f8e3804a 2010-08-20 575: reload = True
80f8e3804a 2010-08-20 576:
80f8e3804a 2010-08-20 577: # forcibly checking file if index hods Pragma header
80f8e3804a 2010-08-20 578: if not reload and 'Pragma' in index[url] and index[url]['Pragma'] == 'no-cache':
80f8e3804a 2010-08-20 579: info +='\nPragma on: recheck imminent.'
80f8e3804a 2010-08-20 580: recheck = True
80f8e3804a 2010-08-20 581:
80f8e3804a 2010-08-20 582: # skipping file processing if there's no need to recheck it and we have checked it at least 4 hours ago
80f8e3804a 2010-08-20 583: if not recheck and not reload and (options.noupdate or ('_time' in index[url] and (datetime.datetime.now() - datetime.timedelta(hours = 4) - index[url]['_time']).days < 0)):
80f8e3804a 2010-08-20 584: if options.verbose:
80f8e3804a 2010-08-20 585: print(info)
80f8e3804a 2010-08-20 586: continue
80f8e3804a 2010-08-20 587: else:
80f8e3804a 2010-08-20 588: print(info)
80f8e3804a 2010-08-20 589:
80f8e3804a 2010-08-20 590: try:
80f8e3804a 2010-08-20 591: with urllib.request.urlopen(options.root + url) as source:
80f8e3804a 2010-08-20 592: new_headers = {}
80f8e3804a 2010-08-20 593: headers = source.info()
80f8e3804a 2010-08-20 594:
80f8e3804a 2010-08-20 595: # stripping unneeded headers (XXX make this inplace?)
80f8e3804a 2010-08-20 596: for header in headers:
80f8e3804a 2010-08-20 597: if header in desc_fields:
80f8e3804a 2010-08-20 598: if header == 'Pragma' and headers[header] != 'no-cache':
80f8e3804a 2010-08-20 599: print('Pragma:', headers[header])
80f8e3804a 2010-08-20 600: new_headers[header] = headers[header]
80f8e3804a 2010-08-20 601: elif not header in ignore_fields:
80f8e3804a 2010-08-20 602: print('Undefined header "', header, '": ', headers[header], sep='')
80f8e3804a 2010-08-20 603:
80f8e3804a 2010-08-20 604: # comparing headers with data found in index
80f8e3804a 2010-08-20 605: # if any header has changed (except Pragma) file is fully downloaded
80f8e3804a 2010-08-20 606: # same if we get more or less headers
80f8e3804a 2010-08-20 607: old_keys = set(index[url].keys())
80f8e3804a 2010-08-20 608: old_keys.discard('_time')
80f8e3804a 2010-08-20 609: old_keys.discard('Pragma')
80f8e3804a 2010-08-20 610: more_keys = set(new_headers.keys()) - old_keys
80f8e3804a 2010-08-20 611: more_keys.discard('Pragma')
80f8e3804a 2010-08-20 612: less_keys = old_keys - set(new_headers.keys())
80f8e3804a 2010-08-20 613: if len(more_keys) > 0:
80f8e3804a 2010-08-20 614: if not len(old_keys) == 0:
80f8e3804a 2010-08-20 615: print('More headers appear:', more_keys)
80f8e3804a 2010-08-20 616: reload = True
80f8e3804a 2010-08-20 617: elif len(less_keys) > 0:
80f8e3804a 2010-08-20 618: print('Less headers appear:', less_keys)
80f8e3804a 2010-08-20 619: else:
80f8e3804a 2010-08-20 620: for key in index[url].keys():
80f8e3804a 2010-08-20 621: if key[0] != '_' and key != 'Pragma' and not index[url][key] == new_headers[key]:
80f8e3804a 2010-08-20 622: print('Header "', key, '" changed from [', index[url][key], '] to [', new_headers[key], ']', sep='')
80f8e3804a 2010-08-20 623: reload = True
80f8e3804a 2010-08-20 624:
80f8e3804a 2010-08-20 625: # downloading file
80f8e3804a 2010-08-20 626: if reload:
80f8e3804a 2010-08-20 627: if 'Content-Length' in headers:
80f8e3804a 2010-08-20 628: print('Downloading', headers['Content-Length'], 'bytes [', end='')
80f8e3804a 2010-08-20 629: else:
80f8e3804a 2010-08-20 630: print('Downloading [', end='')
80f8e3804a 2010-08-20 631: sys.stdout.flush()
80f8e3804a 2010-08-20 632:
80f8e3804a 2010-08-20 633: # file is created at temporary location and moved in place only when download completes
80f8e3804a 2010-08-20 634: temp_file = open(options.dir + os.sep + '.tmp', 'wb')
80f8e3804a 2010-08-20 635: buffer = source.read(block_size)
80f8e3804a 2010-08-20 636: megablocks = 0
80f8e3804a 2010-08-20 637: blocks = 0
80f8e3804a 2010-08-20 638: megs = 0
80f8e3804a 2010-08-20 639: while len(buffer) > 0:
80f8e3804a 2010-08-20 640: temp_file.write(buffer)
80f8e3804a 2010-08-20 641: buffer = source.read(block_size)
80f8e3804a 2010-08-20 642: blocks += 1
80f8e3804a 2010-08-20 643: if blocks > 102400/block_size:
80f8e3804a 2010-08-20 644: megablocks += 1
80f8e3804a 2010-08-20 645: if megablocks > 10:
80f8e3804a 2010-08-20 646: megablocks = megablocks - 10
80f8e3804a 2010-08-20 647: megs += 1
80f8e3804a 2010-08-20 648: print('{}Mb'.format(megs), end='')
80f8e3804a 2010-08-20 649: else:
80f8e3804a 2010-08-20 650: print('.', end='')
80f8e3804a 2010-08-20 651: blocks = blocks - 102400/block_size
80f8e3804a 2010-08-20 652: sys.stdout.flush()
80f8e3804a 2010-08-20 653: temp_file.close()
80f8e3804a 2010-08-20 654: print(']')
80f8e3804a 2010-08-20 655: os.renames(options.dir + os.sep + '.tmp', file_name)
80f8e3804a 2010-08-20 656:
80f8e3804a 2010-08-20 657: checked_files += 1
80f8e3804a 2010-08-20 658:
80f8e3804a 2010-08-20 659: # storing new time mark and storing new headers
80f8e3804a 2010-08-20 660: new_headers['_time'] = datetime.datetime.now()
80f8e3804a 2010-08-20 661: index[url] = new_headers
80f8e3804a 2010-08-20 662: index.sync()
80f8e3804a 2010-08-20 663:
80f8e3804a 2010-08-20 664: except urllib.error.HTTPError as error:
80f8e3804a 2010-08-20 665: # in case of error we don't need to do anything actually,
80f8e3804a 2010-08-20 666: # if file download stalls or fails the file would not be moved to it's location
80f8e3804a 2010-08-20 667: print(error)
80f8e3804a 2010-08-20 668:
80f8e3804a 2010-08-20 669: if options.verbose:
80f8e3804a 2010-08-20 670: print('[', len(unchecked_files), '/', checked_files, ']')
80f8e3804a 2010-08-20 671:
80f8e3804a 2010-08-20 672: # checking if there were any files downloaded, if yes - restarting sequence
80f8e3804a 2010-08-20 673: if checked_files == 0:
80f8e3804a 2010-08-20 674: break