Guido van Rossum | 7c6ebb5 | 1994-03-22 12:05:32 +0000 | [diff] [blame] | 1 | # Open an arbitrary URL |
| 2 | # |
| 3 | # See the following document for a tentative description of URLs: |
| 4 | # Uniform Resource Locators Tim Berners-Lee |
| 5 | # INTERNET DRAFT CERN |
| 6 | # IETF URL Working Group 14 July 1993 |
| 7 | # draft-ietf-uri-url-01.txt |
| 8 | # |
| 9 | # The object returned by URLopener().open(file) will differ per |
| 10 | # protocol. All you know is that is has methods read(), readline(), |
| 11 | # readlines(), fileno(), close() and info(). The read*(), fileno() |
| 12 | # and close() methods work like those of open files. |
| 13 | # The info() method returns an rfc822.Message object which can be |
| 14 | # used to query various info about the object, if available. |
| 15 | # (rfc822.Message objects are queried with the getheader() method.) |
| 16 | |
Guido van Rossum | 7c395db | 1994-07-04 22:14:49 +0000 | [diff] [blame] | 17 | import string |
Guido van Rossum | 7c6ebb5 | 1994-03-22 12:05:32 +0000 | [diff] [blame] | 18 | import socket |
| 19 | import regex |
| 20 | |
| 21 | |
Guido van Rossum | 6cb15a0 | 1995-06-22 19:00:13 +0000 | [diff] [blame] | 22 | __version__ = '1.0' |
| 23 | |
| 24 | |
Guido van Rossum | 7c6ebb5 | 1994-03-22 12:05:32 +0000 | [diff] [blame] | 25 | # This really consists of two pieces: |
| 26 | # (1) a class which handles opening of all sorts of URLs |
| 27 | # (plus assorted utilities etc.) |
| 28 | # (2) a set of functions for parsing URLs |
| 29 | # XXX Should these be separated out into different modules? |
| 30 | |
| 31 | |
| 32 | # Shortcut for basic usage |
| 33 | _urlopener = None |
| 34 | def urlopen(url): |
| 35 | global _urlopener |
| 36 | if not _urlopener: |
| 37 | _urlopener = URLopener() |
| 38 | return _urlopener.open(url) |
| 39 | def urlretrieve(url): |
| 40 | global _urlopener |
| 41 | if not _urlopener: |
| 42 | _urlopener = URLopener() |
| 43 | return _urlopener.retrieve(url) |
| 44 | def urlcleanup(): |
| 45 | if _urlopener: |
| 46 | _urlopener.cleanup() |
| 47 | |
| 48 | |
| 49 | # Class to open URLs. |
| 50 | # This is a class rather than just a subroutine because we may need |
| 51 | # more than one set of global protocol-specific options. |
| 52 | ftpcache = {} |
| 53 | class URLopener: |
| 54 | |
| 55 | # Constructor |
| 56 | def __init__(self): |
Guido van Rossum | 6cb15a0 | 1995-06-22 19:00:13 +0000 | [diff] [blame] | 57 | server_version = "Python-urllib/%s" % __version__ |
| 58 | self.addheaders = [('User-agent', server_version)] |
Guido van Rossum | 7aeb4b9 | 1994-08-23 13:32:20 +0000 | [diff] [blame] | 59 | self.tempcache = None |
| 60 | # Undocumented feature: if you assign {} to tempcache, |
| 61 | # it is used to cache files retrieved with |
| 62 | # self.retrieve(). This is not enabled by default |
| 63 | # since it does not work for changing documents (and I |
| 64 | # haven't got the logic to check expiration headers |
| 65 | # yet). |
Guido van Rossum | 7c6ebb5 | 1994-03-22 12:05:32 +0000 | [diff] [blame] | 66 | self.ftpcache = ftpcache |
| 67 | # Undocumented feature: you can use a different |
| 68 | # ftp cache by assigning to the .ftpcache member; |
| 69 | # in case you want logically independent URL openers |
| 70 | |
| 71 | def __del__(self): |
| 72 | self.close() |
| 73 | |
| 74 | def close(self): |
| 75 | self.cleanup() |
| 76 | |
| 77 | def cleanup(self): |
| 78 | import os |
Guido van Rossum | 7aeb4b9 | 1994-08-23 13:32:20 +0000 | [diff] [blame] | 79 | if self.tempcache: |
| 80 | for url in self.tempcache.keys(): |
| 81 | try: |
| 82 | os.unlink(self.tempcache[url][0]) |
| 83 | except os.error: |
| 84 | pass |
| 85 | del self.tempcache[url] |
Guido van Rossum | 7c6ebb5 | 1994-03-22 12:05:32 +0000 | [diff] [blame] | 86 | |
| 87 | # Add a header to be used by the HTTP interface only |
| 88 | # e.g. u.addheader('Accept', 'sound/basic') |
| 89 | def addheader(self, *args): |
| 90 | self.addheaders.append(args) |
| 91 | |
| 92 | # External interface |
| 93 | # Use URLopener().open(file) instead of open(file, 'r') |
| 94 | def open(self, url): |
| 95 | type, url = splittype(unwrap(url)) |
| 96 | if not type: type = 'file' |
| 97 | name = 'open_' + type |
| 98 | if '-' in name: |
| 99 | import regsub |
| 100 | name = regsub.gsub('-', '_', name) |
| 101 | if not hasattr(self, name): |
| 102 | raise IOError, ('url error', 'unknown url type', type) |
| 103 | try: |
| 104 | return getattr(self, name)(url) |
| 105 | except socket.error, msg: |
| 106 | raise IOError, ('socket error', msg) |
| 107 | |
| 108 | # External interface |
| 109 | # retrieve(url) returns (filename, None) for a local object |
| 110 | # or (tempfilename, headers) for a remote object |
| 111 | def retrieve(self, url): |
Guido van Rossum | 7aeb4b9 | 1994-08-23 13:32:20 +0000 | [diff] [blame] | 112 | if self.tempcache and self.tempcache.has_key(url): |
Guido van Rossum | 7c6ebb5 | 1994-03-22 12:05:32 +0000 | [diff] [blame] | 113 | return self.tempcache[url] |
| 114 | url1 = unwrap(url) |
Guido van Rossum | 7aeb4b9 | 1994-08-23 13:32:20 +0000 | [diff] [blame] | 115 | if self.tempcache and self.tempcache.has_key(url1): |
Guido van Rossum | 7c6ebb5 | 1994-03-22 12:05:32 +0000 | [diff] [blame] | 116 | self.tempcache[url] = self.tempcache[url1] |
| 117 | return self.tempcache[url1] |
| 118 | type, url1 = splittype(url1) |
| 119 | if not type or type == 'file': |
| 120 | try: |
| 121 | fp = self.open_local_file(url1) |
| 122 | del fp |
| 123 | return splithost(url1)[1], None |
| 124 | except IOError, msg: |
| 125 | pass |
| 126 | fp = self.open(url) |
| 127 | headers = fp.info() |
| 128 | import tempfile |
| 129 | tfn = tempfile.mktemp() |
Guido van Rossum | fa59e83 | 1994-09-21 11:36:19 +0000 | [diff] [blame] | 130 | result = tfn, headers |
Guido van Rossum | 7aeb4b9 | 1994-08-23 13:32:20 +0000 | [diff] [blame] | 131 | if self.tempcache is not None: |
Guido van Rossum | fa59e83 | 1994-09-21 11:36:19 +0000 | [diff] [blame] | 132 | self.tempcache[url] = result |
Guido van Rossum | 7c6ebb5 | 1994-03-22 12:05:32 +0000 | [diff] [blame] | 133 | tfp = open(tfn, 'w') |
| 134 | bs = 1024*8 |
| 135 | block = fp.read(bs) |
| 136 | while block: |
| 137 | tfp.write(block) |
| 138 | block = fp.read(bs) |
| 139 | del fp |
| 140 | del tfp |
| 141 | return result |
| 142 | |
| 143 | # Each method named open_<type> knows how to open that type of URL |
| 144 | |
| 145 | # Use HTTP protocol |
| 146 | def open_http(self, url): |
| 147 | import httplib |
| 148 | host, selector = splithost(url) |
Guido van Rossum | 590b289 | 1994-04-18 09:39:56 +0000 | [diff] [blame] | 149 | if not host: raise IOError, ('http error', 'no host given') |
Guido van Rossum | 7c6ebb5 | 1994-03-22 12:05:32 +0000 | [diff] [blame] | 150 | h = httplib.HTTP(host) |
| 151 | h.putrequest('GET', selector) |
| 152 | for args in self.addheaders: apply(h.putheader, args) |
Guido van Rossum | 6cb15a0 | 1995-06-22 19:00:13 +0000 | [diff] [blame] | 153 | h.endheaders() |
Guido van Rossum | 7c6ebb5 | 1994-03-22 12:05:32 +0000 | [diff] [blame] | 154 | errcode, errmsg, headers = h.getreply() |
Guido van Rossum | 6cb15a0 | 1995-06-22 19:00:13 +0000 | [diff] [blame] | 155 | fp = h.getfile() |
| 156 | if errcode == 200: |
| 157 | return addinfo(fp, headers) |
| 158 | else: |
| 159 | n = len(fp.read()) |
| 160 | fp.close() |
| 161 | raise IOError, ('http error', errcode, errmsg, headers) |
Guido van Rossum | 7c6ebb5 | 1994-03-22 12:05:32 +0000 | [diff] [blame] | 162 | |
| 163 | # Use Gopher protocol |
| 164 | def open_gopher(self, url): |
| 165 | import gopherlib |
| 166 | host, selector = splithost(url) |
Guido van Rossum | 590b289 | 1994-04-18 09:39:56 +0000 | [diff] [blame] | 167 | if not host: raise IOError, ('gopher error', 'no host given') |
Guido van Rossum | 7c6ebb5 | 1994-03-22 12:05:32 +0000 | [diff] [blame] | 168 | type, selector = splitgophertype(selector) |
| 169 | selector, query = splitquery(selector) |
Guido van Rossum | 7c395db | 1994-07-04 22:14:49 +0000 | [diff] [blame] | 170 | selector = unquote(selector) |
| 171 | if query: |
| 172 | query = unquote(query) |
| 173 | fp = gopherlib.send_query(selector, query, host) |
| 174 | else: |
| 175 | fp = gopherlib.send_selector(selector, host) |
Guido van Rossum | 7c6ebb5 | 1994-03-22 12:05:32 +0000 | [diff] [blame] | 176 | return addinfo(fp, noheaders()) |
| 177 | |
| 178 | # Use local file or FTP depending on form of URL |
| 179 | def open_file(self, url): |
| 180 | try: |
| 181 | return self.open_local_file(url) |
| 182 | except IOError: |
| 183 | return self.open_ftp(url) |
| 184 | |
| 185 | # Use local file |
| 186 | def open_local_file(self, url): |
| 187 | host, file = splithost(url) |
| 188 | if not host: return addinfo(open(file, 'r'), noheaders()) |
| 189 | host, port = splitport(host) |
| 190 | if not port and socket.gethostbyname(host) in ( |
| 191 | localhost(), thishost()): |
Guido van Rossum | 7c395db | 1994-07-04 22:14:49 +0000 | [diff] [blame] | 192 | file = unquote(file) |
Guido van Rossum | 7c6ebb5 | 1994-03-22 12:05:32 +0000 | [diff] [blame] | 193 | return addinfo(open(file, 'r'), noheaders()) |
| 194 | raise IOError, ('local file error', 'not on local host') |
| 195 | |
| 196 | # Use FTP protocol |
| 197 | def open_ftp(self, url): |
Guido van Rossum | 7c395db | 1994-07-04 22:14:49 +0000 | [diff] [blame] | 198 | host, path = splithost(url) |
Guido van Rossum | 7c6ebb5 | 1994-03-22 12:05:32 +0000 | [diff] [blame] | 199 | if not host: raise IOError, ('ftp error', 'no host given') |
| 200 | host, port = splitport(host) |
Guido van Rossum | 7c395db | 1994-07-04 22:14:49 +0000 | [diff] [blame] | 201 | user, host = splituser(host) |
| 202 | if user: user, passwd = splitpasswd(user) |
| 203 | else: passwd = None |
Guido van Rossum | 7c6ebb5 | 1994-03-22 12:05:32 +0000 | [diff] [blame] | 204 | host = socket.gethostbyname(host) |
| 205 | if not port: |
| 206 | import ftplib |
| 207 | port = ftplib.FTP_PORT |
Guido van Rossum | 7c395db | 1994-07-04 22:14:49 +0000 | [diff] [blame] | 208 | path, attrs = splitattr(path) |
| 209 | dirs = string.splitfields(path, '/') |
| 210 | dirs, file = dirs[:-1], dirs[-1] |
| 211 | if dirs and not dirs[0]: dirs = dirs[1:] |
| 212 | key = (user, host, port, string.joinfields(dirs, '/')) |
Guido van Rossum | 3f9a6ec | 1994-08-12 13:16:50 +0000 | [diff] [blame] | 213 | ## print 'key =', key |
Guido van Rossum | 7c6ebb5 | 1994-03-22 12:05:32 +0000 | [diff] [blame] | 214 | try: |
| 215 | if not self.ftpcache.has_key(key): |
Guido van Rossum | 7c395db | 1994-07-04 22:14:49 +0000 | [diff] [blame] | 216 | self.ftpcache[key] = \ |
| 217 | ftpwrapper(user, passwd, |
| 218 | host, port, dirs) |
| 219 | if not file: type = 'D' |
| 220 | else: type = 'I' |
| 221 | for attr in attrs: |
| 222 | attr, value = splitvalue(attr) |
| 223 | if string.lower(attr) == 'type' and \ |
| 224 | value in ('a', 'A', 'i', 'I', 'd', 'D'): |
| 225 | type = string.upper(value) |
| 226 | return addinfo(self.ftpcache[key].retrfile(file, type), |
Guido van Rossum | 7c6ebb5 | 1994-03-22 12:05:32 +0000 | [diff] [blame] | 227 | noheaders()) |
| 228 | except ftperrors(), msg: |
| 229 | raise IOError, ('ftp error', msg) |
| 230 | |
| 231 | |
| 232 | # Utility functions |
| 233 | |
| 234 | # Return the IP address of the magic hostname 'localhost' |
| 235 | _localhost = None |
| 236 | def localhost(): |
| 237 | global _localhost |
| 238 | if not _localhost: |
| 239 | _localhost = socket.gethostbyname('localhost') |
| 240 | return _localhost |
| 241 | |
| 242 | # Return the IP address of the current host |
| 243 | _thishost = None |
| 244 | def thishost(): |
| 245 | global _thishost |
| 246 | if not _thishost: |
| 247 | _thishost = socket.gethostbyname(socket.gethostname()) |
| 248 | return _thishost |
| 249 | |
| 250 | # Return the set of errors raised by the FTP class |
| 251 | _ftperrors = None |
| 252 | def ftperrors(): |
| 253 | global _ftperrors |
| 254 | if not _ftperrors: |
| 255 | import ftplib |
| 256 | _ftperrors = (ftplib.error_reply, |
| 257 | ftplib.error_temp, |
| 258 | ftplib.error_perm, |
| 259 | ftplib.error_proto) |
| 260 | return _ftperrors |
| 261 | |
| 262 | # Return an empty rfc822.Message object |
| 263 | _noheaders = None |
| 264 | def noheaders(): |
| 265 | global _noheaders |
| 266 | if not _noheaders: |
| 267 | import rfc822 |
| 268 | _noheaders = rfc822.Message(open('/dev/null', 'r')) |
| 269 | _noheaders.fp.close() # Recycle file descriptor |
| 270 | return _noheaders |
| 271 | |
| 272 | |
| 273 | # Utility classes |
| 274 | |
| 275 | # Class used by open_ftp() for cache of open FTP connections |
| 276 | class ftpwrapper: |
Guido van Rossum | 7c395db | 1994-07-04 22:14:49 +0000 | [diff] [blame] | 277 | def __init__(self, user, passwd, host, port, dirs): |
| 278 | self.user = unquote(user or '') |
| 279 | self.passwd = unquote(passwd or '') |
Guido van Rossum | 7c6ebb5 | 1994-03-22 12:05:32 +0000 | [diff] [blame] | 280 | self.host = host |
| 281 | self.port = port |
Guido van Rossum | 7c395db | 1994-07-04 22:14:49 +0000 | [diff] [blame] | 282 | self.dirs = [] |
| 283 | for dir in dirs: |
| 284 | self.dirs.append(unquote(dir)) |
Guido van Rossum | 7c6ebb5 | 1994-03-22 12:05:32 +0000 | [diff] [blame] | 285 | self.init() |
| 286 | def init(self): |
| 287 | import ftplib |
| 288 | self.ftp = ftplib.FTP() |
| 289 | self.ftp.connect(self.host, self.port) |
Guido van Rossum | 7c395db | 1994-07-04 22:14:49 +0000 | [diff] [blame] | 290 | self.ftp.login(self.user, self.passwd) |
| 291 | for dir in self.dirs: |
| 292 | self.ftp.cwd(dir) |
| 293 | def retrfile(self, file, type): |
Guido van Rossum | 7c6ebb5 | 1994-03-22 12:05:32 +0000 | [diff] [blame] | 294 | import ftplib |
Guido van Rossum | 7c395db | 1994-07-04 22:14:49 +0000 | [diff] [blame] | 295 | if type in ('d', 'D'): cmd = 'TYPE A'; isdir = 1 |
| 296 | else: cmd = 'TYPE ' + type; isdir = 0 |
Guido van Rossum | 7c6ebb5 | 1994-03-22 12:05:32 +0000 | [diff] [blame] | 297 | try: |
Guido van Rossum | 7c395db | 1994-07-04 22:14:49 +0000 | [diff] [blame] | 298 | self.ftp.voidcmd(cmd) |
Guido van Rossum | 7c6ebb5 | 1994-03-22 12:05:32 +0000 | [diff] [blame] | 299 | except ftplib.all_errors: |
| 300 | self.init() |
Guido van Rossum | 7c395db | 1994-07-04 22:14:49 +0000 | [diff] [blame] | 301 | self.ftp.voidcmd(cmd) |
Guido van Rossum | 7c6ebb5 | 1994-03-22 12:05:32 +0000 | [diff] [blame] | 302 | conn = None |
Guido van Rossum | 7c395db | 1994-07-04 22:14:49 +0000 | [diff] [blame] | 303 | if file and not isdir: |
Guido van Rossum | 7c6ebb5 | 1994-03-22 12:05:32 +0000 | [diff] [blame] | 304 | try: |
| 305 | cmd = 'RETR ' + file |
| 306 | conn = self.ftp.transfercmd(cmd) |
| 307 | except ftplib.error_perm, reason: |
| 308 | if reason[:3] != '550': |
| 309 | raise IOError, ('ftp error', reason) |
| 310 | if not conn: |
| 311 | # Try a directory listing |
| 312 | if file: cmd = 'LIST ' + file |
| 313 | else: cmd = 'LIST' |
| 314 | conn = self.ftp.transfercmd(cmd) |
| 315 | return addclosehook(conn.makefile('r'), self.ftp.voidresp) |
| 316 | |
| 317 | # Base class for addinfo and addclosehook |
| 318 | class addbase: |
| 319 | def __init__(self, fp): |
| 320 | self.fp = fp |
| 321 | self.read = self.fp.read |
| 322 | self.readline = self.fp.readline |
| 323 | self.readlines = self.fp.readlines |
| 324 | self.fileno = self.fp.fileno |
| 325 | def __repr__(self): |
| 326 | return '<%s at %s whose fp = %s>' % ( |
| 327 | self.__class__.__name__, `id(self)`, `self.fp`) |
| 328 | def __del__(self): |
| 329 | self.close() |
| 330 | def close(self): |
| 331 | self.read = None |
| 332 | self.readline = None |
| 333 | self.readlines = None |
| 334 | self.fileno = None |
Guido van Rossum | 6cb15a0 | 1995-06-22 19:00:13 +0000 | [diff] [blame] | 335 | if self.fp: self.fp.close() |
Guido van Rossum | 7c6ebb5 | 1994-03-22 12:05:32 +0000 | [diff] [blame] | 336 | self.fp = None |
| 337 | |
| 338 | # Class to add a close hook to an open file |
| 339 | class addclosehook(addbase): |
| 340 | def __init__(self, fp, closehook, *hookargs): |
| 341 | addbase.__init__(self, fp) |
| 342 | self.closehook = closehook |
| 343 | self.hookargs = hookargs |
| 344 | def close(self): |
| 345 | if self.closehook: |
| 346 | apply(self.closehook, self.hookargs) |
| 347 | self.closehook = None |
| 348 | self.hookargs = None |
| 349 | addbase.close(self) |
| 350 | |
| 351 | # class to add an info() method to an open file |
| 352 | class addinfo(addbase): |
| 353 | def __init__(self, fp, headers): |
| 354 | addbase.__init__(self, fp) |
| 355 | self.headers = headers |
| 356 | def info(self): |
| 357 | return self.headers |
| 358 | |
| 359 | |
| 360 | # Utility to combine a URL with a base URL to form a new URL |
| 361 | |
| 362 | def basejoin(base, url): |
| 363 | type, path = splittype(url) |
Guido van Rossum | 7c6ebb5 | 1994-03-22 12:05:32 +0000 | [diff] [blame] | 364 | host, path = splithost(path) |
Guido van Rossum | a112470 | 1994-12-30 17:18:59 +0000 | [diff] [blame] | 365 | if type and host: return url |
Guido van Rossum | 7c6ebb5 | 1994-03-22 12:05:32 +0000 | [diff] [blame] | 366 | basetype, basepath = splittype(base) |
| 367 | basehost, basepath = splithost(basepath) |
| 368 | basepath, basetag = splittag(basepath) |
| 369 | basepath, basequery = splitquery(basepath) |
Guido van Rossum | a112470 | 1994-12-30 17:18:59 +0000 | [diff] [blame] | 370 | if not type: type = basetype or 'file' |
Guido van Rossum | 7c6ebb5 | 1994-03-22 12:05:32 +0000 | [diff] [blame] | 371 | if path[:1] != '/': |
Guido van Rossum | 7c6ebb5 | 1994-03-22 12:05:32 +0000 | [diff] [blame] | 372 | i = string.rfind(basepath, '/') |
| 373 | if i < 0: basepath = '/' |
| 374 | else: basepath = basepath[:i+1] |
| 375 | path = basepath + path |
| 376 | if not host: host = basehost |
| 377 | if host: return type + '://' + host + path |
| 378 | else: return type + ':' + path |
| 379 | |
| 380 | |
Guido van Rossum | 7c395db | 1994-07-04 22:14:49 +0000 | [diff] [blame] | 381 | # Utilities to parse URLs (most of these return None for missing parts): |
Guido van Rossum | 7c6ebb5 | 1994-03-22 12:05:32 +0000 | [diff] [blame] | 382 | # unwrap('<URL:type//host/path>') --> 'type//host/path' |
| 383 | # splittype('type:opaquestring') --> 'type', 'opaquestring' |
| 384 | # splithost('//host[:port]/path') --> 'host[:port]', '/path' |
Guido van Rossum | 7c395db | 1994-07-04 22:14:49 +0000 | [diff] [blame] | 385 | # splituser('user[:passwd]@host[:port]') --> 'user[:passwd]', 'host[:port]' |
| 386 | # splitpasswd('user:passwd') -> 'user', 'passwd' |
Guido van Rossum | 7c6ebb5 | 1994-03-22 12:05:32 +0000 | [diff] [blame] | 387 | # splitport('host:port') --> 'host', 'port' |
| 388 | # splitquery('/path?query') --> '/path', 'query' |
| 389 | # splittag('/path#tag') --> '/path', 'tag' |
Guido van Rossum | 7c395db | 1994-07-04 22:14:49 +0000 | [diff] [blame] | 390 | # splitattr('/path;attr1=value1;attr2=value2;...') -> |
| 391 | # '/path', ['attr1=value1', 'attr2=value2', ...] |
| 392 | # splitvalue('attr=value') --> 'attr', 'value' |
Guido van Rossum | 7c6ebb5 | 1994-03-22 12:05:32 +0000 | [diff] [blame] | 393 | # splitgophertype('/Xselector') --> 'X', 'selector' |
| 394 | # unquote('abc%20def') -> 'abc def' |
| 395 | # quote('abc def') -> 'abc%20def') |
| 396 | |
| 397 | def unwrap(url): |
Guido van Rossum | 7c6ebb5 | 1994-03-22 12:05:32 +0000 | [diff] [blame] | 398 | url = string.strip(url) |
| 399 | if url[:1] == '<' and url[-1:] == '>': |
| 400 | url = string.strip(url[1:-1]) |
| 401 | if url[:4] == 'URL:': url = string.strip(url[4:]) |
| 402 | return url |
| 403 | |
| 404 | _typeprog = regex.compile('^\([^/:]+\):\(.*\)$') |
| 405 | def splittype(url): |
| 406 | if _typeprog.match(url) >= 0: return _typeprog.group(1, 2) |
| 407 | return None, url |
| 408 | |
| 409 | _hostprog = regex.compile('^//\([^/]+\)\(.*\)$') |
| 410 | def splithost(url): |
| 411 | if _hostprog.match(url) >= 0: return _hostprog.group(1, 2) |
| 412 | return None, url |
| 413 | |
Guido van Rossum | 7c395db | 1994-07-04 22:14:49 +0000 | [diff] [blame] | 414 | _userprog = regex.compile('^\([^@]*\)@\(.*\)$') |
| 415 | def splituser(host): |
| 416 | if _userprog.match(host) >= 0: return _userprog.group(1, 2) |
| 417 | return None, host |
| 418 | |
| 419 | _passwdprog = regex.compile('^\([^:]*\):\(.*\)$') |
| 420 | def splitpasswd(user): |
| 421 | if _passwdprog.match(user) >= 0: return _passwdprog.group(1, 2) |
| 422 | return user, None |
| 423 | |
Guido van Rossum | 7c6ebb5 | 1994-03-22 12:05:32 +0000 | [diff] [blame] | 424 | _portprog = regex.compile('^\(.*\):\([0-9]+\)$') |
| 425 | def splitport(host): |
| 426 | if _portprog.match(host) >= 0: return _portprog.group(1, 2) |
| 427 | return host, None |
| 428 | |
| 429 | _queryprog = regex.compile('^\(.*\)\?\([^?]*\)$') |
| 430 | def splitquery(url): |
| 431 | if _queryprog.match(url) >= 0: return _queryprog.group(1, 2) |
| 432 | return url, None |
| 433 | |
| 434 | _tagprog = regex.compile('^\(.*\)#\([^#]*\)$') |
| 435 | def splittag(url): |
| 436 | if _tagprog.match(url) >= 0: return _tagprog.group(1, 2) |
| 437 | return url, None |
| 438 | |
Guido van Rossum | 7c395db | 1994-07-04 22:14:49 +0000 | [diff] [blame] | 439 | def splitattr(url): |
| 440 | words = string.splitfields(url, ';') |
| 441 | return words[0], words[1:] |
| 442 | |
| 443 | _valueprog = regex.compile('^\([^=]*\)=\(.*\)$') |
| 444 | def splitvalue(attr): |
| 445 | if _valueprog.match(attr) >= 0: return _valueprog.group(1, 2) |
| 446 | return attr, None |
| 447 | |
Guido van Rossum | 7c6ebb5 | 1994-03-22 12:05:32 +0000 | [diff] [blame] | 448 | def splitgophertype(selector): |
| 449 | if selector[:1] == '/' and selector[1:2]: |
| 450 | return selector[1], selector[2:] |
| 451 | return None, selector |
| 452 | |
| 453 | _quoteprog = regex.compile('%[0-9a-fA-F][0-9a-fA-F]') |
| 454 | def unquote(s): |
Guido van Rossum | 7c6ebb5 | 1994-03-22 12:05:32 +0000 | [diff] [blame] | 455 | i = 0 |
| 456 | n = len(s) |
| 457 | res = '' |
| 458 | while 0 <= i < n: |
| 459 | j = _quoteprog.search(s, i) |
| 460 | if j < 0: |
| 461 | res = res + s[i:] |
| 462 | break |
| 463 | res = res + (s[i:j] + chr(eval('0x' + s[j+1:j+3]))) |
| 464 | i = j+3 |
| 465 | return res |
| 466 | |
Guido van Rossum | 3bb5448 | 1994-08-29 10:52:58 +0000 | [diff] [blame] | 467 | always_safe = string.letters + string.digits + '_,.-' |
Guido van Rossum | 7c395db | 1994-07-04 22:14:49 +0000 | [diff] [blame] | 468 | def quote(s, safe = '/'): |
| 469 | safe = always_safe + safe |
Guido van Rossum | 7c6ebb5 | 1994-03-22 12:05:32 +0000 | [diff] [blame] | 470 | res = '' |
| 471 | for c in s: |
Guido van Rossum | 7c395db | 1994-07-04 22:14:49 +0000 | [diff] [blame] | 472 | if c in safe: |
| 473 | res = res + c |
| 474 | else: |
| 475 | res = res + '%%%02x' % ord(c) |
Guido van Rossum | 7c6ebb5 | 1994-03-22 12:05:32 +0000 | [diff] [blame] | 476 | return res |
| 477 | |
| 478 | # Test and time quote() and unquote() |
| 479 | def test1(): |
| 480 | import time |
| 481 | s = '' |
| 482 | for i in range(256): s = s + chr(i) |
| 483 | s = s*4 |
| 484 | t0 = time.time() |
| 485 | qs = quote(s) |
| 486 | uqs = unquote(qs) |
| 487 | t1 = time.time() |
| 488 | if uqs != s: |
| 489 | print 'Wrong!' |
| 490 | print `s` |
| 491 | print `qs` |
| 492 | print `uqs` |
| 493 | print round(t1 - t0, 3), 'sec' |
| 494 | |
| 495 | |
| 496 | # Test program |
| 497 | def test(): |
| 498 | import sys |
| 499 | import regsub |
| 500 | args = sys.argv[1:] |
| 501 | if not args: |
| 502 | args = [ |
| 503 | '/etc/passwd', |
| 504 | 'file:/etc/passwd', |
| 505 | 'file://localhost/etc/passwd', |
| 506 | 'ftp://ftp.cwi.nl/etc/passwd', |
| 507 | 'gopher://gopher.cwi.nl/11/', |
| 508 | 'http://www.cwi.nl/index.html', |
| 509 | ] |
| 510 | try: |
| 511 | for url in args: |
| 512 | print '-'*10, url, '-'*10 |
| 513 | fn, h = urlretrieve(url) |
| 514 | print fn, h |
| 515 | if h: |
| 516 | print '======' |
| 517 | for k in h.keys(): print k + ':', h[k] |
| 518 | print '======' |
| 519 | fp = open(fn, 'r') |
| 520 | data = fp.read() |
| 521 | del fp |
| 522 | print regsub.gsub('\r', '', data) |
| 523 | fn, h = None, None |
| 524 | print '-'*40 |
| 525 | finally: |
| 526 | urlcleanup() |
| 527 | |
| 528 | # Run test program when run as a script |
| 529 | if __name__ == '__main__': |
Guido van Rossum | 7c395db | 1994-07-04 22:14:49 +0000 | [diff] [blame] | 530 | ## test1() |
Guido van Rossum | 7c6ebb5 | 1994-03-22 12:05:32 +0000 | [diff] [blame] | 531 | test() |