601ec56da6 2011-12-19 1: #!/usr/bin/env python
601ec56da6 2011-12-19 2:
601ec56da6 2011-12-19 3: from __future__ import unicode_literals, print_function
e7b837a681 2010-08-25 4:
601ec56da6 2011-12-19 5: import bsddb.dbshelve, copy, datetime, os, BaseHTTPServer, sys, spacemap, re, urllib2
e7b837a681 2010-08-25 6:
e7b837a681 2010-08-25 7: class Config:
e7b837a681 2010-08-25 8: __slots__ = frozenset(['_config', '_default', '_section', 'options', 'root'])
e7b837a681 2010-08-25 9: _default = {
e7b837a681 2010-08-25 10: 'general': {
e7b837a681 2010-08-25 11: 'port': '8008',
e7b837a681 2010-08-25 12: },
e7b837a681 2010-08-25 13: '_other': {
e7b837a681 2010-08-25 14: 'verbose': 'no',
e7b837a681 2010-08-25 15: 'noetag': 'no',
e7b837a681 2010-08-25 16: 'noparts': 'no',
cab908195f 2010-09-06 17: 'strip': '',
cab908195f 2010-09-06 18: 'sub': '',
e7b837a681 2010-08-25 19: },}
e7b837a681 2010-08-25 20:
e7b837a681 2010-08-25 21: # function to read in config file
e7b837a681 2010-08-25 22: def __init__(self):
601ec56da6 2011-12-19 23: import ConfigParser, optparse
e7b837a681 2010-08-25 24:
e7b837a681 2010-08-25 25: parser = optparse.OptionParser()
e7b837a681 2010-08-25 26: parser.add_option('-c', '--config', dest = 'config', help = 'config file location', metavar = 'FILE', default = 'samesite.conf')
e7b837a681 2010-08-25 27: (self.options, args) = parser.parse_args()
e7b837a681 2010-08-25 28:
e7b837a681 2010-08-25 29: assert os.access(self.options.config, os.R_OK), "Fatal error: can't read {}".format(self.options.config)
e7b837a681 2010-08-25 30:
e7b837a681 2010-08-25 31: configDir = re.compile('^(.*)/[^/]+$').match(self.options.config)
e7b837a681 2010-08-25 32: if configDir:
e7b837a681 2010-08-25 33: self.root = configDir.group(1)
e7b837a681 2010-08-25 34: else:
e7b837a681 2010-08-25 35: self.root = os.getcwd()
e7b837a681 2010-08-25 36:
601ec56da6 2011-12-19 37: self._config = ConfigParser.ConfigParser()
e7b837a681 2010-08-25 38: self._config.readfp(open(self.options.config))
e7b837a681 2010-08-25 39:
e7b837a681 2010-08-25 40: for section in self._config.sections():
e7b837a681 2010-08-25 41: if section != 'general':
e7b837a681 2010-08-25 42: if self._config.has_option(section, 'dir'):
e7b837a681 2010-08-25 43: if re.compile('^/$').match(self._config.get(section, 'dir')):
e7b837a681 2010-08-25 44: self._config.set(section, 'dir', self.root + os.sep + section)
e7b837a681 2010-08-25 45: thisDir = re.compile('^(.*)/$').match(self._config.get(section, 'dir'))
e7b837a681 2010-08-25 46: if thisDir:
e7b837a681 2010-08-25 47: self._config.set(section, 'dir', thisDir.group(1))
e7b837a681 2010-08-25 48: if not re.compile('^/(.*)$').match(self._config.get(section, 'dir')):
e7b837a681 2010-08-25 49: self._config.set(section, 'dir', self.root + os.sep + self._config.get(section, 'dir'))
e7b837a681 2010-08-25 50: else:
e7b837a681 2010-08-25 51: self._config.set(section, 'dir', self.root + os.sep + section)
e7b837a681 2010-08-25 52:
e7b837a681 2010-08-25 53: if not self._config.has_option(section, 'root'):
e7b837a681 2010-08-25 54: self._config.set(section, 'root', section)
e7b837a681 2010-08-25 55:
e7b837a681 2010-08-25 56: # function to select config file section or create one
e7b837a681 2010-08-25 57: def section(self, section):
e7b837a681 2010-08-25 58: if not self._config.has_section(section):
e7b837a681 2010-08-25 59: self._config.add_section(section)
e7b837a681 2010-08-25 60: self._section = section
e7b837a681 2010-08-25 61:
e7b837a681 2010-08-25 62: # function to get config parameter, if parameter doesn't exists the default
e7b837a681 2010-08-25 63: # value or None is substituted
e7b837a681 2010-08-25 64: def __getitem__(self, name):
e7b837a681 2010-08-25 65: if not self._config.has_option(self._section, name):
e7b837a681 2010-08-25 66: if self._section in self._default:
e7b837a681 2010-08-25 67: if name in self._default[self._section]:
e7b837a681 2010-08-25 68: self._config.set(self._section, name, self._default[self._section][name])
e7b837a681 2010-08-25 69: else:
e7b837a681 2010-08-25 70: self._config.set(self._section, name, None)
e7b837a681 2010-08-25 71: elif name in self._default['_other']:
e7b837a681 2010-08-25 72: self._config.set(self._section, name, self._default['_other'][name])
e7b837a681 2010-08-25 73: else:
e7b837a681 2010-08-25 74: self._config.set(self._section, name, None)
e7b837a681 2010-08-25 75: return(self._config.get(self._section, name))
e7b837a681 2010-08-25 76:
e7b837a681 2010-08-25 77: config = Config()
e7b837a681 2010-08-25 78:
e7b837a681 2010-08-25 79: #assert options.port or os.access(options.log, os.R_OK), 'Log file unreadable'
e7b837a681 2010-08-25 80:
601ec56da6 2011-12-19 81: const_desc_fields = set(['content-length', 'last-modified', 'pragma'])
cab908195f 2010-09-06 82: const_ignore_fields = set([
601ec56da6 2011-12-19 83: 'accept-ranges', 'age',
601ec56da6 2011-12-19 84: 'cache-control', 'connection', 'content-type',
601ec56da6 2011-12-19 85: 'date',
601ec56da6 2011-12-19 86: 'expires',
601ec56da6 2011-12-19 87: 'referer',
601ec56da6 2011-12-19 88: 'server',
601ec56da6 2011-12-19 89: 'via',
601ec56da6 2011-12-19 90: 'x-cache', 'x-cache-lookup', 'x-livetool', 'x-powered-by',
cab908195f 2010-09-06 91: ])
cab908195f 2010-09-06 92:
cab908195f 2010-09-06 93: block_size = 4096
cab908195f 2010-09-06 94:
601ec56da6 2011-12-19 95: class MyRequestHandler(BaseHTTPServer.BaseHTTPRequestHandler):
90160dbf50 2011-03-06 96: def __process(self):
90160dbf50 2011-03-06 97: # reload means file needs to be reloaded to serve request
90160dbf50 2011-03-06 98: reload = False
90160dbf50 2011-03-06 99: # recheck means file needs to be checked, this also means that if file hav been modified we can serve older copy
90160dbf50 2011-03-06 100: recheck = False
90160dbf50 2011-03-06 101: # file_stat means file definitely exists
90160dbf50 2011-03-06 102: file_stat = None
90160dbf50 2011-03-06 103: # requested_ranges holds data about any range requested
90160dbf50 2011-03-06 104: requested_ranges = None
90160dbf50 2011-03-06 105: # records holds data from index locally, should be written back upon successfull completion
90160dbf50 2011-03-06 106: record = None
90160dbf50 2011-03-06 107:
90160dbf50 2011-03-06 108: myPath = re.compile('^(.*?)(\?.*)$').match(self.path)
90160dbf50 2011-03-06 109: if myPath:
90160dbf50 2011-03-06 110: my_path = myPath.group(1)
90160dbf50 2011-03-06 111: else:
90160dbf50 2011-03-06 112: my_path = self.path
90160dbf50 2011-03-06 113:
601ec56da6 2011-12-19 114: config.section(self.headers['host'])
90160dbf50 2011-03-06 115:
90160dbf50 2011-03-06 116: if config['sub'] != None and config['strip'] != None and len(config['strip']) > 0:
90160dbf50 2011-03-06 117: string = re.compile(config['strip']).sub(config['sub'], my_path)
90160dbf50 2011-03-06 118: my_path = string
90160dbf50 2011-03-06 119:
90160dbf50 2011-03-06 120: info = 'Checking file: ' + my_path
90160dbf50 2011-03-06 121:
90160dbf50 2011-03-06 122: if not os.access(config['dir'], os.X_OK):
90160dbf50 2011-03-06 123: os.mkdir(config['dir'])
90160dbf50 2011-03-06 124: # this is file index - everything is stored in this file
90160dbf50 2011-03-06 125: # _parts - list of stored parts of file
90160dbf50 2011-03-06 126: # _time - last time the file was checked
90160dbf50 2011-03-06 127: # everything else is just the headers
601ec56da6 2011-12-19 128: index = bsddb.dbshelve.open(config['dir'] + os.sep + '.index')
90160dbf50 2011-03-06 129:
90160dbf50 2011-03-06 130: desc_fields = const_desc_fields.copy()
90160dbf50 2011-03-06 131: ignore_fields = const_ignore_fields.copy()
90160dbf50 2011-03-06 132: if config['noetag'] == 'no':
601ec56da6 2011-12-19 133: desc_fields.add('etag')
90160dbf50 2011-03-06 134: else:
601ec56da6 2011-12-19 135: ignore_fields.add('etag')
90160dbf50 2011-03-06 136:
90160dbf50 2011-03-06 137: proxy_ignored = set([
601ec56da6 2011-12-19 138: 'accept', 'accept-charset', 'accept-encoding', 'accept-language',
601ec56da6 2011-12-19 139: 'cache-control', 'connection', 'content-length', 'cookie',
601ec56da6 2011-12-19 140: 'host',
601ec56da6 2011-12-19 141: 'if-modified-since', 'if-unmodified-since',
601ec56da6 2011-12-19 142: 'referer',
601ec56da6 2011-12-19 143: 'user-agent',
601ec56da6 2011-12-19 144: 'via',
601ec56da6 2011-12-19 145: 'x-forwarded-for', 'x-last-hr', 'x-last-http-status-code', 'x-removed', 'x-real-ip', 'x-retry-count',
90160dbf50 2011-03-06 146: ])
90160dbf50 2011-03-06 147:
90160dbf50 2011-03-06 148: print('===============[ {} request ]==='.format(self.command))
90160dbf50 2011-03-06 149:
90160dbf50 2011-03-06 150: for header in self.headers:
90160dbf50 2011-03-06 151: if header in proxy_ignored:
90160dbf50 2011-03-06 152: pass
601ec56da6 2011-12-19 153: elif header in ('range'):
90160dbf50 2011-03-06 154: isRange = re.compile('bytes=(\d+)-(\d+)').match(self.headers[header])
90160dbf50 2011-03-06 155: if isRange:
90160dbf50 2011-03-06 156: requested_ranges = spacemap.SpaceMap({int(isRange.group(1)): int(isRange.group(2)) + 1})
90160dbf50 2011-03-06 157: else:
90160dbf50 2011-03-06 158: return()
601ec56da6 2011-12-19 159: elif header in ('pragma'):
90160dbf50 2011-03-06 160: if my_path in index:
90160dbf50 2011-03-06 161: index[my_path][header] = self.headers[header]
90160dbf50 2011-03-06 162: else:
90160dbf50 2011-03-06 163: print('Unknown header - ', header, ': ', self.headers[header], sep='')
90160dbf50 2011-03-06 164: return()
90160dbf50 2011-03-06 165: print(header, self.headers[header])
90160dbf50 2011-03-06 166:
90160dbf50 2011-03-06 167: # creating file name from my_path
90160dbf50 2011-03-06 168: file_name = config['dir'] + os.sep + re.compile('%20').sub(' ', my_path)
90160dbf50 2011-03-06 169: # partial file or unfinished download
90160dbf50 2011-03-06 170: temp_name = config['dir'] + os.sep + '.parts' + re.compile('%20').sub(' ', my_path)
90160dbf50 2011-03-06 171:
90160dbf50 2011-03-06 172: # creating empty placeholder in index
90160dbf50 2011-03-06 173: # if there's no space map and there's no file in real directory - we have no file
90160dbf50 2011-03-06 174: # if there's an empty space map - file is full
90160dbf50 2011-03-06 175: # space map generally covers every bit of file we don't posess currently
90160dbf50 2011-03-06 176: if not my_path in index:
90160dbf50 2011-03-06 177: info += '\nThis one is new.'
90160dbf50 2011-03-06 178: reload = True
90160dbf50 2011-03-06 179: record = {}
90160dbf50 2011-03-06 180: else:
90160dbf50 2011-03-06 181: # forcibly checking file if no file present
90160dbf50 2011-03-06 182: record = index[my_path]
90160dbf50 2011-03-06 183: if os.access(file_name, os.R_OK):
90160dbf50 2011-03-06 184: info += '\nFull file found.'
90160dbf50 2011-03-06 185: file_stat = os.stat(file_name)
90160dbf50 2011-03-06 186: elif '_parts' in index[my_path] and os.access(temp_name, os.R_OK):
90160dbf50 2011-03-06 187: info += '\nPartial file found.'
90160dbf50 2011-03-06 188: file_stat = os.stat(temp_name)
d1fa9d0737 2012-01-16 189: recheck = True
90160dbf50 2011-03-06 190: else:
90160dbf50 2011-03-06 191: info += '\nFile not found or inaccessible.'
90160dbf50 2011-03-06 192: record['_parts'] = None
90160dbf50 2011-03-06 193: reload = True
90160dbf50 2011-03-06 194:
90160dbf50 2011-03-06 195: if not '_parts' in record:
90160dbf50 2011-03-06 196: record['_parts'] = None
90160dbf50 2011-03-06 197:
90160dbf50 2011-03-06 198: if record['_parts'] == None:
90160dbf50 2011-03-06 199: recheck = True
90160dbf50 2011-03-06 200:
90160dbf50 2011-03-06 201: # forcibly checking file if file size doesn't match with index data
90160dbf50 2011-03-06 202: if not reload:
90160dbf50 2011-03-06 203: if '_parts' in record and record['_parts'] == spacemap.SpaceMap():
601ec56da6 2011-12-19 204: if 'content-length' in record and file_stat and file_stat.st_size != int(record['content-length']):
601ec56da6 2011-12-19 205: info += '\nFile size is {} and stored file size is {}.'.format(file_stat.st_size, record['content-length'])
90160dbf50 2011-03-06 206: record['_parts'] = None
90160dbf50 2011-03-06 207: reload = True
90160dbf50 2011-03-06 208:
90160dbf50 2011-03-06 209: # forcibly checking file if index holds Pragma header
601ec56da6 2011-12-19 210: if not reload and 'pragma' in record and record['pragma'] == 'no-cache':
90160dbf50 2011-03-06 211: info +='\nPragma on: recheck imminent.'
90160dbf50 2011-03-06 212: recheck = True
90160dbf50 2011-03-06 213:
90160dbf50 2011-03-06 214: # skipping file processing if there's no need to recheck it and we have checked it at least 4 hours ago
8425e2e393 2011-12-14 215: if not recheck and not reload and '_time' in record and (record['_time'] - datetime.datetime.now() + datetime.timedelta(hours = 4)).days < 0:
8425e2e393 2011-12-14 216: info += '\nFile is old - rechecking.'
90160dbf50 2011-03-06 217: recheck = True
90160dbf50 2011-03-06 218:
90160dbf50 2011-03-06 219: print(info)
90160dbf50 2011-03-06 220: if reload or recheck:
90160dbf50 2011-03-06 221:
90160dbf50 2011-03-06 222: try:
90160dbf50 2011-03-06 223: request = 'http://' + config['root'] + self.path
90160dbf50 2011-03-06 224: my_headers = {}
601ec56da6 2011-12-19 225: for header in ('cache-control', 'cookie', 'referer', 'user-agent'):
90160dbf50 2011-03-06 226: if header in self.headers:
90160dbf50 2011-03-06 227: my_headers[header] = self.headers[header]
90160dbf50 2011-03-06 228:
90160dbf50 2011-03-06 229: needed = None
b5c328f916 2012-01-04 230: if self.command not in ('HEAD'):
b5c328f916 2012-01-04 231: if '_parts' in record and record['_parts'] != None:
b5c328f916 2012-01-04 232: if config['noparts'] != 'no' or requested_ranges == None or requested_ranges == spacemap.SpaceMap():
b5c328f916 2012-01-04 233: needed = record['_parts']
b5c328f916 2012-01-04 234: else:
b5c328f916 2012-01-04 235: needed = record['_parts'] & requested_ranges
b5c328f916 2012-01-04 236: elif config['noparts'] =='no' and requested_ranges != None and requested_ranges != spacemap.SpaceMap():
b5c328f916 2012-01-04 237: needed = requested_ranges
b5c328f916 2012-01-04 238: ranges = ()
b5c328f916 2012-01-04 239: print('Missing ranges: {}, requested ranges: {}, needed ranges: {}.'.format(record['_parts'], requested_ranges, needed))
b5c328f916 2012-01-04 240: if needed != None and len(needed) > 0:
b5c328f916 2012-01-04 241: needed.rewind()
b5c328f916 2012-01-04 242: while True:
b5c328f916 2012-01-04 243: range = needed.pop()
b5c328f916 2012-01-04 244: if range[0] == None:
b5c328f916 2012-01-04 245: break
b5c328f916 2012-01-04 246: ranges += '{}-{}'.format(range[0], range[1] - 1),
b5c328f916 2012-01-04 247: my_headers['range'] = 'bytes=' + ','.join(ranges)
b5c328f916 2012-01-04 248:
31a8af9ff1 2012-01-16 249: my_headers['Accept-Encoding'] = 'gzip'
601ec56da6 2011-12-19 250: request = urllib2.Request(request, headers = my_headers)
601ec56da6 2011-12-19 251:
a81f1a70fb 2012-01-16 252: source = urllib2.urlopen(request, timeout = 60)
601ec56da6 2011-12-19 253: new_record = {}
601ec56da6 2011-12-19 254: new_record['_parts'] = record['_parts']
601ec56da6 2011-12-19 255: headers = source.info()
62e6d8a7ab 2012-01-16 256:
62e6d8a7ab 2012-01-16 257: if 'content-encoding' in headers and headers['content-encoding'] == 'gzip':
a81f1a70fb 2012-01-16 258: import gzip
a81f1a70fb 2012-01-16 259: source = gzip.GzipFile(fileobj=source)
601ec56da6 2011-12-19 260:
601ec56da6 2011-12-19 261: # stripping unneeded headers (XXX make this inplace?)
601ec56da6 2011-12-19 262: for header in headers:
601ec56da6 2011-12-19 263: if header in desc_fields:
601ec56da6 2011-12-19 264: #if header == 'Pragma' and headers[header] != 'no-cache':
601ec56da6 2011-12-19 265: if header == 'content-length':
601ec56da6 2011-12-19 266: if 'content-range' not in headers:
601ec56da6 2011-12-19 267: new_record[header] = int(headers[header])
601ec56da6 2011-12-19 268: else:
601ec56da6 2011-12-19 269: new_record[header] = headers[header]
601ec56da6 2011-12-19 270: elif header == 'content-range':
601ec56da6 2011-12-19 271: range = re.compile('^bytes (\d+)-(\d+)/(\d+)$').match(headers[header])
601ec56da6 2011-12-19 272: if range:
601ec56da6 2011-12-19 273: new_record['content-length'] = int(range.group(3))
601ec56da6 2011-12-19 274: else:
601ec56da6 2011-12-19 275: assert False, 'Content-Range unrecognized.'
601ec56da6 2011-12-19 276: elif not header in ignore_fields:
601ec56da6 2011-12-19 277: print('Undefined header "', header, '": ', headers[header], sep='')
601ec56da6 2011-12-19 278:
601ec56da6 2011-12-19 279: # comparing headers with data found in index
601ec56da6 2011-12-19 280: # if any header has changed (except Pragma) file is fully downloaded
601ec56da6 2011-12-19 281: # same if we get more or less headers
601ec56da6 2011-12-19 282: old_keys = set(record.keys())
601ec56da6 2011-12-19 283: old_keys.discard('_time')
601ec56da6 2011-12-19 284: old_keys.discard('pragma')
601ec56da6 2011-12-19 285: more_keys = set(new_record.keys()) - old_keys
601ec56da6 2011-12-19 286: more_keys.discard('pragma')
601ec56da6 2011-12-19 287: less_keys = old_keys - set(new_record.keys())
601ec56da6 2011-12-19 288: if len(more_keys) > 0:
601ec56da6 2011-12-19 289: if len(old_keys) != 0:
601ec56da6 2011-12-19 290: print('More headers appear:', more_keys)
601ec56da6 2011-12-19 291: reload = True
601ec56da6 2011-12-19 292: elif len(less_keys) > 0:
601ec56da6 2011-12-19 293: print('Less headers appear:', less_keys)
601ec56da6 2011-12-19 294: else:
601ec56da6 2011-12-19 295: for key in record.keys():
601ec56da6 2011-12-19 296: if key[0] != '_' and key != 'pragma' and record[key] != new_record[key]:
601ec56da6 2011-12-19 297: print('Header "', key, '" changed from [', record[key], '] to [', new_record[key], ']', sep='')
601ec56da6 2011-12-19 298: print(type(record[key]), type(new_record[key]))
601ec56da6 2011-12-19 299: reload = True
601ec56da6 2011-12-19 300:
601ec56da6 2011-12-19 301: if reload:
601ec56da6 2011-12-19 302: print('Reloading.')
601ec56da6 2011-12-19 303: if os.access(temp_name, os.R_OK):
601ec56da6 2011-12-19 304: os.unlink(temp_name)
601ec56da6 2011-12-19 305: if os.access(file_name, os.R_OK):
601ec56da6 2011-12-19 306: os.unlink(file_name)
601ec56da6 2011-12-19 307: if 'content-length' in new_record:
601ec56da6 2011-12-19 308: new_record['_parts'] = spacemap.SpaceMap({0: int(new_record['content-length'])})
601ec56da6 2011-12-19 309: if not new_record['_parts']:
601ec56da6 2011-12-19 310: new_record['_parts'] = spacemap.SpaceMap()
601ec56da6 2011-12-19 311: print(new_record)
601ec56da6 2011-12-19 312:
601ec56da6 2011-12-19 313: # downloading file or segment
601ec56da6 2011-12-19 314: if 'content-length' in new_record:
601ec56da6 2011-12-19 315: if needed == None:
601ec56da6 2011-12-19 316: needed = new_record['_parts']
601ec56da6 2011-12-19 317: else:
601ec56da6 2011-12-19 318: if len(needed) > 1:
601ec56da6 2011-12-19 319: print("Multipart requests currently not supported.")
601ec56da6 2011-12-19 320: assert False, 'Skip this one for now.'
601ec56da6 2011-12-19 321: #else:
601ec56da6 2011-12-19 322: #assert False, 'No content-length or Content-Range header.'
601ec56da6 2011-12-19 323:
601ec56da6 2011-12-19 324: new_record['_time'] = datetime.datetime.now()
601ec56da6 2011-12-19 325: if self.command not in ('HEAD'):
601ec56da6 2011-12-19 326: # file is created at temporary location and moved in place only when download completes
601ec56da6 2011-12-19 327: if not os.access(temp_name, os.R_OK):
601ec56da6 2011-12-19 328: empty_name = config['dir'] + os.sep + '.tmp'
601ec56da6 2011-12-19 329: with open(empty_name, 'w+b') as some_file:
601ec56da6 2011-12-19 330: pass
601ec56da6 2011-12-19 331: os.renames(empty_name, temp_name)
601ec56da6 2011-12-19 332: temp_file = open(temp_name, 'r+b')
601ec56da6 2011-12-19 333: if requested_ranges == None and needed == None:
601ec56da6 2011-12-19 334: needed = new_record['_parts']
601ec56da6 2011-12-19 335: needed.rewind()
601ec56da6 2011-12-19 336: while True:
62e6d8a7ab 2012-01-16 337: # XXX can make this implicit - one request per range
601ec56da6 2011-12-19 338: (start, end) = needed.pop()
601ec56da6 2011-12-19 339: if start == None:
601ec56da6 2011-12-19 340: break
601ec56da6 2011-12-19 341: stream_last = start
601ec56da6 2011-12-19 342: old_record = copy.copy(new_record)
601ec56da6 2011-12-19 343: if end - start < block_size:
601ec56da6 2011-12-19 344: req_block_size = end - start
601ec56da6 2011-12-19 345: else:
601ec56da6 2011-12-19 346: req_block_size = block_size
601ec56da6 2011-12-19 347: buffer = source.read(req_block_size)
601ec56da6 2011-12-19 348: length = len(buffer)
601ec56da6 2011-12-19 349: while length > 0 and stream_last < end:
601ec56da6 2011-12-19 350: stream_pos = stream_last + length
601ec56da6 2011-12-19 351: assert stream_pos <= end, 'Received more data then requested: pos:{} start:{} end:{}.'.format(stream_pos, start, end)
601ec56da6 2011-12-19 352: temp_file.seek(stream_last)
601ec56da6 2011-12-19 353: temp_file.write(buffer)
601ec56da6 2011-12-19 354: x = new_record['_parts'] - spacemap.SpaceMap({stream_last: stream_pos})
601ec56da6 2011-12-19 355: new_record['_parts'] = new_record['_parts'] - spacemap.SpaceMap({stream_last: stream_pos})
601ec56da6 2011-12-19 356: index[my_path] = old_record
601ec56da6 2011-12-19 357: index.sync()
601ec56da6 2011-12-19 358: old_record = copy.copy(new_record)
601ec56da6 2011-12-19 359: stream_last = stream_pos
601ec56da6 2011-12-19 360: if end - stream_last < block_size:
601ec56da6 2011-12-19 361: req_block_size = end - stream_last
601ec56da6 2011-12-19 362: buffer = source.read(req_block_size)
601ec56da6 2011-12-19 363: length = len(buffer)
601ec56da6 2011-12-19 364: # moving downloaded data to real file
601ec56da6 2011-12-19 365: temp_file.close()
601ec56da6 2011-12-19 366:
601ec56da6 2011-12-19 367: index[my_path] = new_record
601ec56da6 2011-12-19 368: index.sync()
601ec56da6 2011-12-19 369:
601ec56da6 2011-12-19 370: except urllib2.HTTPError as error:
90160dbf50 2011-03-06 371: # in case of error we don't need to do anything actually,
90160dbf50 2011-03-06 372: # if file download stalls or fails the file would not be moved to it's location
90160dbf50 2011-03-06 373: print(error)
90160dbf50 2011-03-06 374:
90160dbf50 2011-03-06 375: print(index[my_path])
90160dbf50 2011-03-06 376:
90160dbf50 2011-03-06 377: 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():
90160dbf50 2011-03-06 378: # just moving
90160dbf50 2011-03-06 379: # drop old dirs XXX
90160dbf50 2011-03-06 380: print('Moving temporary file to new destination.')
90160dbf50 2011-03-06 381: os.renames(temp_name, file_name)
90160dbf50 2011-03-06 382:
90160dbf50 2011-03-06 383: if not my_path in index:
90160dbf50 2011-03-06 384: self.send_response(502)
90160dbf50 2011-03-06 385: self.end_headers()
90160dbf50 2011-03-06 386: return
90160dbf50 2011-03-06 387:
90160dbf50 2011-03-06 388: if self.command == 'HEAD':
90160dbf50 2011-03-06 389: self.send_response(200)
601ec56da6 2011-12-19 390: if 'content-length' in index[my_path]:
601ec56da6 2011-12-19 391: self.send_header('content-length', index[my_path]['content-length'])
601ec56da6 2011-12-19 392: self.send_header('accept-ranges', 'bytes')
601ec56da6 2011-12-19 393: self.send_header('content-type', 'application/octet-stream')
601ec56da6 2011-12-19 394: if 'last-modified' in index[my_path]:
601ec56da6 2011-12-19 395: self.send_header('last-modified', index[my_path]['last-modified'])
90160dbf50 2011-03-06 396: self.end_headers()
90160dbf50 2011-03-06 397: else:
90160dbf50 2011-03-06 398: if ('_parts' in index[my_path] and index[my_path]['_parts'] != spacemap.SpaceMap()) or not os.access(file_name, os.R_OK):
90160dbf50 2011-03-06 399: file_name = temp_name
90160dbf50 2011-03-06 400:
90160dbf50 2011-03-06 401: with open(file_name, 'rb') as real_file:
90160dbf50 2011-03-06 402: file_stat = os.stat(file_name)
601ec56da6 2011-12-19 403: if 'range' in self.headers:
90160dbf50 2011-03-06 404: self.send_response(206)
90160dbf50 2011-03-06 405: ranges = ()
90160dbf50 2011-03-06 406: requested_ranges.rewind()
90160dbf50 2011-03-06 407: while True:
90160dbf50 2011-03-06 408: pair = requested_ranges.pop()
90160dbf50 2011-03-06 409: if pair[0] == None:
90160dbf50 2011-03-06 410: break
90160dbf50 2011-03-06 411: ranges += '{}-{}'.format(pair[0], str(pair[1] - 1)),
601ec56da6 2011-12-19 412: self.send_header('content-range', 'bytes {}/{}'.format(','.join(ranges), index[my_path]['content-length']))
90160dbf50 2011-03-06 413: else:
90160dbf50 2011-03-06 414: self.send_response(200)
601ec56da6 2011-12-19 415: self.send_header('content-length', str(file_stat.st_size))
90160dbf50 2011-03-06 416: requested_ranges = spacemap.SpaceMap({0: file_stat.st_size})
601ec56da6 2011-12-19 417: if 'last-modified' in index[my_path]:
601ec56da6 2011-12-19 418: self.send_header('last-modified', index[my_path]['last-modified'])
601ec56da6 2011-12-19 419: self.send_header('content-type', 'application/octet-stream')
90160dbf50 2011-03-06 420: self.end_headers()
90160dbf50 2011-03-06 421: if self.command in ('GET'):
90160dbf50 2011-03-06 422: if len(requested_ranges) > 0:
90160dbf50 2011-03-06 423: requested_ranges.rewind()
90160dbf50 2011-03-06 424: (start, end) = requested_ranges.pop()
90160dbf50 2011-03-06 425: else:
90160dbf50 2011-03-06 426: start = 0
9a8a46bcf0 2011-09-06 427: # XXX ugly hack
601ec56da6 2011-12-19 428: if 'content-length' in index[my_path]:
601ec56da6 2011-12-19 429: end = index[my_path]['content-length']
9a8a46bcf0 2011-09-06 430: else:
9a8a46bcf0 2011-09-06 431: end = 0
90160dbf50 2011-03-06 432: real_file.seek(start)
90160dbf50 2011-03-06 433: if block_size > end - start:
90160dbf50 2011-03-06 434: req_block_size = end - start
90160dbf50 2011-03-06 435: else:
90160dbf50 2011-03-06 436: req_block_size = block_size
90160dbf50 2011-03-06 437: buffer = real_file.read(req_block_size)
90160dbf50 2011-03-06 438: length = len(buffer)
90160dbf50 2011-03-06 439: while length > 0:
90160dbf50 2011-03-06 440: self.wfile.write(buffer)
90160dbf50 2011-03-06 441: start += len(buffer)
90160dbf50 2011-03-06 442: if req_block_size > end - start:
90160dbf50 2011-03-06 443: req_block_size = end - start
90160dbf50 2011-03-06 444: if req_block_size == 0:
90160dbf50 2011-03-06 445: break
90160dbf50 2011-03-06 446: buffer = real_file.read(req_block_size)
90160dbf50 2011-03-06 447: length = len(buffer)
90160dbf50 2011-03-06 448:
90160dbf50 2011-03-06 449: def do_HEAD(self):
90160dbf50 2011-03-06 450: return self.__process()
90160dbf50 2011-03-06 451: def do_GET(self):
90160dbf50 2011-03-06 452: return self.__process()
90160dbf50 2011-03-06 453:
90160dbf50 2011-03-06 454: config.section('general')
601ec56da6 2011-12-19 455: server = BaseHTTPServer.HTTPServer(('127.0.0.1', int(config['port'])), MyRequestHandler)
90160dbf50 2011-03-06 456: server.serve_forever()