1 ;;; url-http.el --- HTTP retrieval routines
3 ;; Copyright (C) 1999, 2001, 2004, 2005, 2006, 2007, 2008,
4 ;; 2009, 2010 Free Software Foundation, Inc.
6 ;; Author: Bill Perry <wmperry@gnu.org>
7 ;; Keywords: comm, data, processes
9 ;; This file is part of GNU Emacs.
11 ;; GNU Emacs is free software: you can redistribute it and/or modify
12 ;; it under the terms of the GNU General Public License as published by
13 ;; the Free Software Foundation, either version 3 of the License, or
14 ;; (at your option) any later version.
16 ;; GNU Emacs is distributed in the hope that it will be useful,
17 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
18 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 ;; GNU General Public License for more details.
21 ;; You should have received a copy of the GNU General Public License
22 ;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
28 (eval-when-compile (require 'cl
))
29 (defvar url-http-extra-headers
)
30 (defvar url-http-target-url
)
31 (defvar url-http-proxy
)
32 (defvar url-http-connection-opened
)
40 (autoload 'url-cache-create-filename
"url-cache")
42 (defconst url-http-default-port
80 "Default HTTP port.")
43 (defconst url-http-asynchronous-p t
"HTTP retrievals are asynchronous.")
44 (defalias 'url-http-expand-file-name
'url-default-expander
)
46 (defvar url-http-real-basic-auth-storage nil
)
47 (defvar url-http-proxy-basic-auth-storage nil
)
49 (defvar url-http-open-connections
(make-hash-table :test
'equal
51 "A hash table of all open network connections.")
53 (defvar url-http-version
"1.1"
54 "What version of HTTP we advertise, as a string.
55 Valid values are 1.1 and 1.0.
56 This is only useful when debugging the HTTP subsystem.
58 Setting this to 1.0 will tell servers not to send chunked encoding,
59 and other HTTP/1.1 specific features.")
61 (defvar url-http-attempt-keepalives t
62 "Whether to use a single TCP connection multiple times in HTTP.
63 This is only useful when debugging the HTTP subsystem. Setting to
64 nil will explicitly close the connection to the server after every
67 (defconst url-http-codes
68 '((100 continue
"Continue with request")
69 (101 switching-protocols
"Switching protocols")
70 (102 processing
"Processing (Added by DAV)")
72 (201 created
"Created")
73 (202 accepted
"Accepted")
74 (203 non-authoritative
"Non-authoritative information")
75 (204 no-content
"No content")
76 (205 reset-content
"Reset content")
77 (206 partial-content
"Partial content")
78 (207 multi-status
"Multi-status (Added by DAV)")
79 (300 multiple-choices
"Multiple choices")
80 (301 moved-permanently
"Moved permanently")
82 (303 see-other
"See other")
83 (304 not-modified
"Not modified")
84 (305 use-proxy
"Use proxy")
85 (307 temporary-redirect
"Temporary redirect")
86 (400 bad-request
"Bad Request")
87 (401 unauthorized
"Unauthorized")
88 (402 payment-required
"Payment required")
89 (403 forbidden
"Forbidden")
90 (404 not-found
"Not found")
91 (405 method-not-allowed
"Method not allowed")
92 (406 not-acceptable
"Not acceptable")
93 (407 proxy-authentication-required
"Proxy authentication required")
94 (408 request-timeout
"Request time-out")
95 (409 conflict
"Conflict")
97 (411 length-required
"Length required")
98 (412 precondition-failed
"Precondition failed")
99 (413 request-entity-too-large
"Request entity too large")
100 (414 request-uri-too-large
"Request-URI too large")
101 (415 unsupported-media-type
"Unsupported media type")
102 (416 requested-range-not-satisfiable
"Requested range not satisfiable")
103 (417 expectation-failed
"Expectation failed")
104 (422 unprocessable-entity
"Unprocessable Entity (Added by DAV)")
105 (423 locked
"Locked")
106 (424 failed-Dependency
"Failed Dependency")
107 (500 internal-server-error
"Internal server error")
108 (501 not-implemented
"Not implemented")
109 (502 bad-gateway
"Bad gateway")
110 (503 service-unavailable
"Service unavailable")
111 (504 gateway-timeout
"Gateway time-out")
112 (505 http-version-not-supported
"HTTP version not supported")
113 (507 insufficient-storage
"Insufficient storage")
114 "The HTTP return codes and their text."))
117 ;; These are all macros so that they are hidden from external sight
118 ;; when the file is byte-compiled.
120 ;; This allows us to expose just the entry points we want.
122 ;; These routines will allow us to implement persistent HTTP
124 (defsubst url-http-debug
(&rest args
)
126 (let ((proc (get-buffer-process (current-buffer))))
127 ;; The user hit C-g, honor it! Some things can get in an
128 ;; incredibly tight loop (chunked encoding)
131 (set-process-sentinel proc nil
)
132 (set-process-filter proc nil
)))
133 (error "Transfer interrupted!")))
134 (apply 'url-debug
'http args
))
136 (defun url-http-mark-connection-as-busy (host port proc
)
137 (url-http-debug "Marking connection as busy: %s:%d %S" host port proc
)
138 (set-process-query-on-exit-flag proc t
)
139 (puthash (cons host port
)
140 (delq proc
(gethash (cons host port
) url-http-open-connections
))
141 url-http-open-connections
)
144 (defun url-http-mark-connection-as-free (host port proc
)
145 (url-http-debug "Marking connection as free: %s:%d %S" host port proc
)
146 (when (memq (process-status proc
) '(open run connect
))
147 (set-process-buffer proc nil
)
148 (set-process-sentinel proc
'url-http-idle-sentinel
)
149 (set-process-query-on-exit-flag proc nil
)
150 (puthash (cons host port
)
151 (cons proc
(gethash (cons host port
) url-http-open-connections
))
152 url-http-open-connections
))
155 (defun url-http-find-free-connection (host port
)
156 (let ((conns (gethash (cons host port
) url-http-open-connections
))
158 (while (and conns
(not found
))
159 (if (not (memq (process-status (car conns
)) '(run open connect
)))
161 (url-http-debug "Cleaning up dead process: %s:%d %S"
162 host port
(car conns
))
163 (url-http-idle-sentinel (car conns
) nil
))
164 (setq found
(car conns
))
165 (url-http-debug "Found existing connection: %s:%d %S" host port found
))
168 (url-http-debug "Reusing existing connection: %s:%d" host port
)
169 (url-http-debug "Contacting host: %s:%d" host port
))
170 (url-lazy-message "Contacting host: %s:%d" host port
)
171 (url-http-mark-connection-as-busy
174 (let ((buf (generate-new-buffer " *url-http-temp*")))
175 ;; `url-open-stream' needs a buffer in which to do things
176 ;; like authentication. But we use another buffer afterwards.
178 (let ((proc (url-open-stream host buf host port
)))
179 ;; url-open-stream might return nil.
180 (when (processp proc
)
181 ;; Drop the temp buffer link before killing the buffer.
182 (set-process-buffer proc nil
))
184 (kill-buffer buf
)))))))
186 ;; Building an HTTP request
187 (defun url-http-user-agent-string ()
188 (if (or (eq url-privacy-level
'paranoid
)
189 (and (listp url-privacy-level
)
190 (memq 'agent url-privacy-level
)))
192 (format "User-Agent: %sURL/%s%s\r\n"
194 (concat url-package-name
"/" url-package-version
" ")
198 ((and url-os-type url-system-type
)
199 (concat " (" url-os-type
"; " url-system-type
")"))
200 ((or url-os-type url-system-type
)
201 (concat " (" (or url-system-type url-os-type
) ")"))
204 (defun url-http-create-request (&optional ref-url
)
205 "Create an HTTP request for `url-http-target-url', referred to by REF-URL."
206 (declare (special proxy-info
207 url-http-method url-http-data
208 url-http-extra-headers
))
209 (let* ((extra-headers)
211 (no-cache (cdr-safe (assoc "Pragma" url-http-extra-headers
)))
212 (using-proxy url-http-proxy
)
213 (proxy-auth (if (or (cdr-safe (assoc "Proxy-Authorization"
214 url-http-extra-headers
))
217 (let ((url-basic-auth-storage
218 'url-http-proxy-basic-auth-storage
))
219 (url-get-authentication url-http-target-url nil
'any nil
))))
220 (real-fname (concat (url-filename url-http-target-url
)
221 (url-recreate-url-attributes url-http-target-url
)))
222 (host (url-host url-http-target-url
))
223 (auth (if (cdr-safe (assoc "Authorization" url-http-extra-headers
))
225 (url-get-authentication (or
226 (and (boundp 'proxy-info
)
228 url-http-target-url
) nil
'any nil
))))
229 (if (equal "" real-fname
)
230 (setq real-fname
"/"))
231 (setq no-cache
(and no-cache
(string-match "no-cache" no-cache
)))
233 (setq auth
(concat "Authorization: " auth
"\r\n")))
235 (setq proxy-auth
(concat "Proxy-Authorization: " proxy-auth
"\r\n")))
237 ;; Protection against stupid values in the referer
238 (if (and ref-url
(stringp ref-url
) (or (string= ref-url
"file:nil")
239 (string= ref-url
"")))
242 ;; We do not want to expose the referer if the user is paranoid.
243 (if (or (memq url-privacy-level
'(low high paranoid
))
244 (and (listp url-privacy-level
)
245 (memq 'lastloc url-privacy-level
)))
248 ;; url-http-extra-headers contains an assoc-list of
249 ;; header/value pairs that we need to put into the request.
250 (setq extra-headers
(mapconcat
252 (concat (car x
) ": " (cdr x
)))
253 url-http-extra-headers
"\r\n"))
254 (if (not (equal extra-headers
""))
255 (setq extra-headers
(concat extra-headers
"\r\n")))
257 ;; This was done with a call to `format'. Concatting parts has
258 ;; the advantage of keeping the parts of each header together and
259 ;; allows us to elide null lines directly, at the cost of making
260 ;; the layout less clear.
262 ;; We used to concat directly, but if one of the strings happens
263 ;; to being multibyte (even if it only contains pure ASCII) then
264 ;; every string gets converted with `string-MAKE-multibyte' which
265 ;; turns the 127-255 codes into things like latin-1 accented chars
266 ;; (it would work right if it used `string-TO-multibyte' instead).
267 ;; So to avoid the problem we force every string to be unibyte.
269 ;; FIXME: Instead of `string-AS-unibyte' we'd want
270 ;; `string-to-unibyte', so as to properly signal an error if one
271 ;; of the strings contains a multibyte char.
276 (or url-http-method
"GET") " "
277 (if using-proxy
(url-recreate-url url-http-target-url
) real-fname
)
278 " HTTP/" url-http-version
"\r\n"
279 ;; Version of MIME we speak
280 "MIME-Version: 1.0\r\n"
281 ;; (maybe) Try to keep the connection open
282 "Connection: " (if (or using-proxy
283 (not url-http-attempt-keepalives
))
284 "close" "keep-alive") "\r\n"
285 ;; HTTP extensions we support
286 (if url-extensions-header
288 "Extension: %s\r\n" url-extensions-header
))
289 ;; Who we want to talk to
290 (if (/= (url-port url-http-target-url
)
291 (url-scheme-get-property
292 (url-type url-http-target-url
) 'default-port
))
294 "Host: %s:%d\r\n" host
(url-port url-http-target-url
))
295 (format "Host: %s\r\n" host
))
297 (if url-personal-mail-address
299 "From: " url-personal-mail-address
"\r\n"))
300 ;; Encodings we understand
301 (if url-mime-encoding-string
303 "Accept-encoding: " url-mime-encoding-string
"\r\n"))
304 (if url-mime-charset-string
306 "Accept-charset: " url-mime-charset-string
"\r\n"))
307 ;; Languages we understand
308 (if url-mime-language-string
310 "Accept-language: " url-mime-language-string
"\r\n"))
311 ;; Types we understand
312 "Accept: " (or url-mime-accept-string
"*/*") "\r\n"
314 (url-http-user-agent-string)
315 ;; Proxy Authorization
320 (url-cookie-generate-header-lines host real-fname
321 (equal "https" (url-type url-http-target-url
)))
323 (if (and (not no-cache
)
324 (member url-http-method
'("GET" nil
)))
325 (let ((tm (url-is-cached url-http-target-url
)))
327 (concat "If-modified-since: "
328 (url-get-normalized-date tm
) "\r\n"))))
331 "Referer: " ref-url
"\r\n"))
336 "Content-length: " (number-to-string
337 (length url-http-data
))
342 url-http-data
"\r\n"))
344 (url-http-debug "Request is: \n%s" request
)
348 (defun url-http-clean-headers ()
349 "Remove trailing \r from header lines.
350 This allows us to use `mail-fetch-field', etc."
351 (declare (special url-http-end-of-headers
))
352 (goto-char (point-min))
353 (while (re-search-forward "\r$" url-http-end-of-headers t
)
356 (defun url-http-handle-authentication (proxy)
357 (declare (special status success url-http-method url-http-data
358 url-callback-function url-callback-arguments
))
359 (url-http-debug "Handling %s authentication" (if proxy
"proxy" "normal"))
360 (let ((auths (or (nreverse
362 (if proxy
"proxy-authenticate" "www-authenticate")
366 (url (url-recreate-url url-current-object
))
367 (auth-url (url-recreate-url
368 (if (and proxy
(boundp 'url-http-proxy
))
370 url-current-object
)))
371 (url-basic-auth-storage (if proxy
372 ;; Cheating, but who cares? :)
373 'url-http-proxy-basic-auth-storage
374 'url-http-real-basic-auth-storage
))
378 ;; find strongest supported auth
379 (dolist (this-auth auths
)
380 (setq this-auth
(url-eat-trailing-space
381 (url-strip-leading-spaces
384 (if (string-match "[ \t]" this-auth
)
385 (downcase (substring this-auth
0 (match-beginning 0)))
386 (downcase this-auth
)))
387 (registered (url-auth-registered this-type
))
388 (this-strength (cddr registered
)))
389 (when (and registered
(> this-strength strength
))
392 strength this-strength
))))
394 (if (not (url-auth-registered type
))
397 (goto-char (point-max))
398 (insert "<hr>Sorry, but I do not know how to handle " type
399 " authentication. If you'd like to write it,"
400 " send it to " url-bug-address
".<hr>")
402 (let* ((args (url-parse-args (subst-char-in-string ?
, ?\
; auth)))
403 (auth (url-get-authentication auth-url
404 (cdr-safe (assoc "realm" args
))
408 (push (cons (if proxy
"Proxy-Authorization" "Authorization") auth
)
409 url-http-extra-headers
)
410 (let ((url-request-method url-http-method
)
411 (url-request-data url-http-data
)
412 (url-request-extra-headers url-http-extra-headers
))
413 (url-retrieve-internal url url-callback-function
414 url-callback-arguments
)))))))
416 (defun url-http-parse-response ()
417 "Parse just the response code."
418 (declare (special url-http-end-of-headers url-http-response-status
419 url-http-response-version
))
420 (if (not url-http-end-of-headers
)
421 (error "Trying to parse HTTP response code in odd buffer: %s" (buffer-name)))
422 (url-http-debug "url-http-parse-response called in (%s)" (buffer-name))
423 (goto-char (point-min))
424 (skip-chars-forward " \t\n") ; Skip any blank crap
425 (skip-chars-forward "HTTP/") ; Skip HTTP Version
426 (setq url-http-response-version
427 (buffer-substring (point)
429 (skip-chars-forward "[0-9].")
431 (setq url-http-response-status
(read (current-buffer))))
433 (defun url-http-handle-cookies ()
434 "Handle all set-cookie / set-cookie2 headers in an HTTP response.
435 The buffer must already be narrowed to the headers, so `mail-fetch-field' will
437 (let ((cookies (nreverse (mail-fetch-field "Set-Cookie" nil nil t
)))
438 (cookies2 (nreverse (mail-fetch-field "Set-Cookie2" nil nil t
))))
439 (and cookies
(url-http-debug "Found %d Set-Cookie headers" (length cookies
)))
440 (and cookies2
(url-http-debug "Found %d Set-Cookie2 headers" (length cookies2
)))
442 (url-cookie-handle-set-cookie (pop cookies
)))
444 ;;; (url-cookie-handle-set-cookie2 (pop cookies)))
448 (defun url-http-parse-headers ()
449 "Parse and handle HTTP specific headers.
450 Return t if and only if the current buffer is still active and
451 should be shown to the user."
452 ;; The comments after each status code handled are taken from RFC
454 (declare (special url-http-end-of-headers url-http-response-status
455 url-http-response-version
456 url-http-method url-http-data url-http-process
457 url-callback-function url-callback-arguments
))
459 (url-http-mark-connection-as-free (url-host url-current-object
)
460 (url-port url-current-object
)
463 (if (or (not (boundp 'url-http-end-of-headers
))
464 (not url-http-end-of-headers
))
465 (error "Trying to parse headers in odd buffer: %s" (buffer-name)))
466 (goto-char (point-min))
467 (url-http-debug "url-http-parse-headers called in (%s)" (buffer-name))
468 (url-http-parse-response)
469 (mail-narrow-to-head)
470 ;;(narrow-to-region (point-min) url-http-end-of-headers)
471 (let ((connection (mail-fetch-field "Connection")))
472 ;; In HTTP 1.0, keep the connection only if there is a
473 ;; "Connection: keep-alive" header.
474 ;; In HTTP 1.1 (and greater), keep the connection unless there is a
475 ;; "Connection: close" header
477 ((string= url-http-response-version
"1.0")
478 (unless (and connection
479 (string= (downcase connection
) "keep-alive"))
480 (delete-process url-http-process
)))
482 (when (and connection
483 (string= (downcase connection
) "close"))
484 (delete-process url-http-process
)))))
485 (let ((buffer (current-buffer))
488 ;; other status symbols: jewelry and luxury cars
489 (status-symbol (cadr (assq url-http-response-status url-http-codes
)))
490 ;; The filename part of a URL could be in remote file syntax,
491 ;; see Bug#6717 for an example. We disable file name
492 ;; handlers, therefore.
493 (file-name-handler-alist nil
))
494 (setq class
(/ url-http-response-status
100))
495 (url-http-debug "Parsed HTTP headers: class=%d status=%d" class url-http-response-status
)
496 (url-http-handle-cookies)
499 ;; Classes of response codes
501 ;; 5xx = Server Error
502 ;; 4xx = Client Error
505 ;; 1xx = Informational
506 (1 ; Information messages
507 ;; 100 = Continue with request
508 ;; 101 = Switching protocols
509 ;; 102 = Processing (Added by DAV)
510 (url-mark-buffer-as-dead buffer
)
511 (error "HTTP responses in class 1xx not supported (%d)" url-http-response-status
))
516 ;; 203 Non-authoritative information
519 ;; 206 Partial content
520 ;; 207 Multi-status (Added by DAV)
522 ((no-content reset-content
)
523 ;; No new data, just stay at the same document
524 (url-mark-buffer-as-dead buffer
)
527 ;; Generic success for all others. Store in the cache, and
528 ;; mark it as successful.
530 (if (and url-automatic-caching
(equal url-http-method
"GET"))
531 (url-store-in-cache buffer
))
534 ;; 300 Multiple choices
535 ;; 301 Moved permanently
540 ;; 307 Temporary redirect
541 (let ((redirect-uri (or (mail-fetch-field "Location")
542 (mail-fetch-field "URI"))))
544 (multiple-choices ; 300
545 ;; Quoth the spec (section 10.3.1)
546 ;; -------------------------------
547 ;; The requested resource corresponds to any one of a set of
548 ;; representations, each with its own specific location and
549 ;; agent-driven negotiation information is being provided so
550 ;; that the user can select a preferred representation and
551 ;; redirect its request to that location.
553 ;; If the server has a preferred choice of representation, it
554 ;; SHOULD include the specific URI for that representation in
555 ;; the Location field; user agents MAY use the Location field
556 ;; value for automatic redirection.
557 ;; -------------------------------
558 ;; We do not support agent-driven negotiation, so we just
559 ;; redirect to the preferred URI if one is provided.
561 ((moved-permanently found temporary-redirect
) ; 301 302 307
562 ;; If the 301|302 status code is received in response to a
563 ;; request other than GET or HEAD, the user agent MUST NOT
564 ;; automatically redirect the request unless it can be
565 ;; confirmed by the user, since this might change the
566 ;; conditions under which the request was issued.
567 (if (member url-http-method
'("HEAD" "GET"))
568 ;; Automatic redirection is ok
570 ;; It is just too big of a pain in the ass to get this
571 ;; prompt all the time. We will just silently lose our
572 ;; data and convert to a GET method.
573 (url-http-debug "Converting `%s' request to `GET' because of REDIRECT(%d)"
574 url-http-method url-http-response-status
)
575 (setq url-http-method
"GET"
578 ;; The response to the request can be found under a different
579 ;; URI and SHOULD be retrieved using a GET method on that
581 (setq url-http-method
"GET"
584 ;; The 304 response MUST NOT contain a message-body.
585 (url-http-debug "Extracting document from cache... (%s)"
586 (url-cache-create-filename (url-view-url t
)))
587 (url-cache-extract (url-cache-create-filename (url-view-url t
)))
588 (setq redirect-uri nil
591 ;; The requested resource MUST be accessed through the
592 ;; proxy given by the Location field. The Location field
593 ;; gives the URI of the proxy. The recipient is expected
594 ;; to repeat this single request via the proxy. 305
595 ;; responses MUST only be generated by origin servers.
596 (error "Redirection thru a proxy server not supported: %s"
599 ;; Treat everything like '300'
602 ;; Clean off any whitespace and/or <...> cruft.
603 (if (string-match "\\([^ \t]+\\)[ \t]" redirect-uri
)
604 (setq redirect-uri
(match-string 1 redirect-uri
)))
605 (if (string-match "^<\\(.*\\)>$" redirect-uri
)
606 (setq redirect-uri
(match-string 1 redirect-uri
)))
608 ;; Some stupid sites (like sourceforge) send a
609 ;; non-fully-qualified URL (ie: /), which royally confuses
611 (if (not (string-match url-nonrelative-link redirect-uri
))
612 ;; Be careful to use the real target URL, otherwise we may
613 ;; compute the redirection relative to the URL of the proxy.
615 (url-expand-file-name redirect-uri url-http-target-url
)))
616 (let ((url-request-method url-http-method
)
617 (url-request-data url-http-data
)
618 (url-request-extra-headers url-http-extra-headers
))
619 ;; Check existing number of redirects
620 (if (or (< url-max-redirections
0)
621 (and (> url-max-redirections
0)
622 (let ((events (car url-callback-arguments
))
625 (if (eq (car events
) :redirect
)
626 (setq old-redirects
(1+ old-redirects
)))
627 (and (setq events
(cdr events
))
628 (setq events
(cdr events
))))
629 (< old-redirects url-max-redirections
))))
630 ;; url-max-redirections hasn't been reached, so go
631 ;; ahead and redirect.
633 ;; Remember that the request was redirected.
634 (setf (car url-callback-arguments
)
635 (nconc (list :redirect redirect-uri
)
636 (car url-callback-arguments
)))
637 ;; Put in the current buffer a forwarding pointer to the new
638 ;; destination buffer.
639 ;; FIXME: This is a hack to fix url-retrieve-synchronously
640 ;; without changing the API. Instead url-retrieve should
641 ;; either simply not return the "destination" buffer, or it
642 ;; should take an optional `dest-buf' argument.
643 (set (make-local-variable 'url-redirect-buffer
)
644 (url-retrieve-internal
645 redirect-uri url-callback-function
646 url-callback-arguments
))
647 (url-mark-buffer-as-dead buffer
))
648 ;; We hit url-max-redirections, so issue an error and
650 (url-http-debug "Maximum redirections reached")
651 (setf (car url-callback-arguments
)
652 (nconc (list :error
(list 'error
'http-redirect-limit
654 (car url-callback-arguments
)))
655 (setq success t
))))))
659 ;; 402 Payment required
662 ;; 405 Method not allowed
663 ;; 406 Not acceptable
664 ;; 407 Proxy authentication required
665 ;; 408 Request time-out
668 ;; 411 Length required
669 ;; 412 Precondition failed
670 ;; 413 Request entity too large
671 ;; 414 Request-URI too large
672 ;; 415 Unsupported media type
673 ;; 416 Requested range not satisfiable
674 ;; 417 Expectation failed
675 ;; 422 Unprocessable Entity (Added by DAV)
677 ;; 424 Failed Dependency
680 ;; The request requires user authentication. The response
681 ;; MUST include a WWW-Authenticate header field containing a
682 ;; challenge applicable to the requested resource. The
683 ;; client MAY repeat the request with a suitable
684 ;; Authorization header field.
685 (url-http-handle-authentication nil
))
686 (payment-required ; 402
687 ;; This code is reserved for future use
688 (url-mark-buffer-as-dead buffer
)
689 (error "Somebody wants you to give them money"))
691 ;; The server understood the request, but is refusing to
692 ;; fulfill it. Authorization will not help and the request
693 ;; SHOULD NOT be repeated.
698 (method-not-allowed ; 405
699 ;; The method specified in the Request-Line is not allowed
700 ;; for the resource identified by the Request-URI. The
701 ;; response MUST include an Allow header containing a list of
702 ;; valid methods for the requested resource.
704 (not-acceptable ; 406
705 ;; The resource identified by the request is only capable of
706 ;; generating response entities which have content
707 ;; characteristics nota cceptable according to the accept
708 ;; headers sent in the request.
710 (proxy-authentication-required ; 407
711 ;; This code is similar to 401 (Unauthorized), but indicates
712 ;; that the client must first authenticate itself with the
713 ;; proxy. The proxy MUST return a Proxy-Authenticate header
714 ;; field containing a challenge applicable to the proxy for
715 ;; the requested resource.
716 (url-http-handle-authentication t
))
717 (request-timeout ; 408
718 ;; The client did not produce a request within the time that
719 ;; the server was prepared to wait. The client MAY repeat
720 ;; the request without modifications at any later time.
723 ;; The request could not be completed due to a conflict with
724 ;; the current state of the resource. This code is only
725 ;; allowed in situations where it is expected that the user
726 ;; mioght be able to resolve the conflict and resubmit the
727 ;; request. The response body SHOULD include enough
728 ;; information for the user to recognize the source of the
732 ;; The requested resource is no longer available at the
733 ;; server and no forwarding address is known.
735 (length-required ; 411
736 ;; The server refuses to accept the request without a defined
737 ;; Content-Length. The client MAY repeat the request if it
738 ;; adds a valid Content-Length header field containing the
739 ;; length of the message-body in the request message.
741 ;; NOTE - this will never happen because
742 ;; `url-http-create-request' automatically calculates the
745 (precondition-failed ; 412
746 ;; The precondition given in one or more of the
747 ;; request-header fields evaluated to false when it was
748 ;; tested on the server.
750 ((request-entity-too-large request-uri-too-large
) ; 413 414
751 ;; The server is refusing to process a request because the
752 ;; request entity|URI is larger than the server is willing or
755 (unsupported-media-type ; 415
756 ;; The server is refusing to service the request because the
757 ;; entity of the request is in a format not supported by the
758 ;; requested resource for the requested method.
760 (requested-range-not-satisfiable ; 416
761 ;; A server SHOULD return a response with this status code if
762 ;; a request included a Range request-header field, and none
763 ;; of the range-specifier values in this field overlap the
764 ;; current extent of the selected resource, and the request
765 ;; did not include an If-Range request-header field.
767 (expectation-failed ; 417
768 ;; The expectation given in an Expect request-header field
769 ;; could not be met by this server, or, if the server is a
770 ;; proxy, the server has unambiguous evidence that the
771 ;; request could not be met by the next-hop server.
774 ;; The request could not be understood by the server due to
775 ;; malformed syntax. The client SHOULD NOT repeat the
776 ;; request without modifications.
778 ;; Tell the callback that an error occurred, and what the
781 (setf (car url-callback-arguments
)
782 (nconc (list :error
(list 'error
'http url-http-response-status
))
783 (car url-callback-arguments
)))))
785 ;; 500 Internal server error
786 ;; 501 Not implemented
788 ;; 503 Service unavailable
789 ;; 504 Gateway time-out
790 ;; 505 HTTP version not supported
791 ;; 507 Insufficient storage
793 (case url-http-response-status
794 (not-implemented ; 501
795 ;; The server does not support the functionality required to
796 ;; fulfill the request.
799 ;; The server, while acting as a gateway or proxy, received
800 ;; an invalid response from the upstream server it accessed
801 ;; in attempting to fulfill the request.
803 (service-unavailable ; 503
804 ;; The server is currently unable to handle the request due
805 ;; to a temporary overloading or maintenance of the server.
806 ;; The implication is that this is a temporary condition
807 ;; which will be alleviated after some delay. If known, the
808 ;; length of the delay MAY be indicated in a Retry-After
809 ;; header. If no Retry-After is given, the client SHOULD
810 ;; handle the response as it would for a 500 response.
812 (gateway-timeout ; 504
813 ;; The server, while acting as a gateway or proxy, did not
814 ;; receive a timely response from the upstream server
815 ;; specified by the URI (e.g. HTTP, FTP, LDAP) or some other
816 ;; auxiliary server (e.g. DNS) it needed to access in
817 ;; attempting to complete the request.
819 (http-version-not-supported ; 505
820 ;; The server does not support, or refuses to support, the
821 ;; HTTP protocol version that was used in the request
824 (insufficient-storage ; 507 (DAV)
825 ;; The method could not be performed on the resource
826 ;; because the server is unable to store the representation
827 ;; needed to successfully complete the request. This
828 ;; condition is considered to be temporary. If the request
829 ;; which received this status code was the result of a user
830 ;; action, the request MUST NOT be repeated until it is
831 ;; requested by a separate user action.
833 ;; Tell the callback that an error occurred, and what the
836 (setf (car url-callback-arguments
)
837 (nconc (list :error
(list 'error
'http url-http-response-status
))
838 (car url-callback-arguments
)))))
840 (error "Unknown class of HTTP response code: %d (%d)"
841 class url-http-response-status
)))
843 (url-mark-buffer-as-dead buffer
))
844 (url-http-debug "Finished parsing HTTP headers: %S" success
)
849 (defun url-http-activate-callback ()
850 "Activate callback specified when this buffer was created."
851 (declare (special url-http-process
852 url-callback-function
853 url-callback-arguments
))
854 (url-http-mark-connection-as-free (url-host url-current-object
)
855 (url-port url-current-object
)
857 (url-http-debug "Activating callback in buffer (%s)" (buffer-name))
858 (apply url-callback-function url-callback-arguments
))
862 ;; These unfortunately cannot be macros... please ignore them!
863 (defun url-http-idle-sentinel (proc why
)
864 "Remove (now defunct) process PROC from the list of open connections."
865 (maphash (lambda (key val
)
867 (puthash key
(delq proc val
) url-http-open-connections
)))
868 url-http-open-connections
))
870 (defun url-http-end-of-document-sentinel (proc why
)
871 ;; Sentinel used for old HTTP/0.9 or connections we know are going
872 ;; to die as the 'end of document' notifier.
873 (url-http-debug "url-http-end-of-document-sentinel in buffer (%s)"
874 (process-buffer proc
))
875 (url-http-idle-sentinel proc why
)
876 (with-current-buffer (process-buffer proc
)
877 (goto-char (point-min))
878 (if (not (looking-at "HTTP/"))
879 ;; HTTP/0.9 just gets passed back no matter what
880 (url-http-activate-callback)
881 (if (url-http-parse-headers)
882 (url-http-activate-callback)))))
884 (defun url-http-simple-after-change-function (st nd length
)
885 ;; Function used when we do NOT know how long the document is going to be
886 ;; Just _very_ simple 'downloaded %d' type of info.
887 (declare (special url-http-end-of-headers
))
888 (url-lazy-message "Reading %s..." (url-pretty-length nd
)))
890 (defun url-http-content-length-after-change-function (st nd length
)
891 "Function used when we DO know how long the document is going to be.
892 More sophisticated percentage downloaded, etc.
893 Also does minimal parsing of HTTP headers and will actually cause
894 the callback to be triggered."
895 (declare (special url-current-object
896 url-http-end-of-headers
897 url-http-content-length
898 url-http-content-type
900 (if url-http-content-type
901 (url-display-percentage
902 "Reading [%s]... %s of %s (%d%%)"
903 (url-percentage (- nd url-http-end-of-headers
)
904 url-http-content-length
)
905 url-http-content-type
906 (url-pretty-length (- nd url-http-end-of-headers
))
907 (url-pretty-length url-http-content-length
)
908 (url-percentage (- nd url-http-end-of-headers
)
909 url-http-content-length
))
910 (url-display-percentage
911 "Reading... %s of %s (%d%%)"
912 (url-percentage (- nd url-http-end-of-headers
)
913 url-http-content-length
)
914 (url-pretty-length (- nd url-http-end-of-headers
))
915 (url-pretty-length url-http-content-length
)
916 (url-percentage (- nd url-http-end-of-headers
)
917 url-http-content-length
)))
919 (if (> (- nd url-http-end-of-headers
) url-http-content-length
)
921 ;; Found the end of the document! Wheee!
922 (url-display-percentage nil nil
)
923 (url-lazy-message "Reading... done.")
924 (if (url-http-parse-headers)
925 (url-http-activate-callback)))))
927 (defun url-http-chunked-encoding-after-change-function (st nd length
)
928 "Function used when dealing with 'chunked' encoding.
929 Cannot give a sophisticated percentage, but we need a different
930 function to look for the special 0-length chunk that signifies
931 the end of the document."
932 (declare (special url-current-object
933 url-http-end-of-headers
934 url-http-content-type
935 url-http-chunked-length
936 url-http-chunked-counter
937 url-http-process url-http-chunked-start
))
940 (let ((read-next-chunk t
)
943 (no-initial-crlf nil
))
944 ;; We need to loop thru looking for more chunks even within
945 ;; one after-change-function call.
946 (while read-next-chunk
947 (setq no-initial-crlf
(= 0 url-http-chunked-counter
))
948 (if url-http-content-type
949 (url-display-percentage nil
950 "Reading [%s]... chunk #%d"
951 url-http-content-type url-http-chunked-counter
)
952 (url-display-percentage nil
953 "Reading... chunk #%d"
954 url-http-chunked-counter
))
955 (url-http-debug "Reading chunk %d (%d %d %d)"
956 url-http-chunked-counter st nd length
)
957 (setq regexp
(if no-initial-crlf
958 "\\([0-9a-z]+\\).*\r?\n"
959 "\r?\n\\([0-9a-z]+\\).*\r?\n"))
961 (if url-http-chunked-start
962 ;; We know how long the chunk is supposed to be, skip over
963 ;; leading crap if possible.
964 (if (> nd
(+ url-http-chunked-start url-http-chunked-length
))
966 (url-http-debug "Got to the end of chunk #%d!"
967 url-http-chunked-counter
)
968 (goto-char (+ url-http-chunked-start
969 url-http-chunked-length
)))
970 (url-http-debug "Still need %d bytes to hit end of chunk"
971 (- (+ url-http-chunked-start
972 url-http-chunked-length
)
974 (setq read-next-chunk nil
)))
975 (if (not read-next-chunk
)
976 (url-http-debug "Still spinning for next chunk...")
977 (if no-initial-crlf
(skip-chars-forward "\r\n"))
978 (if (not (looking-at regexp
))
980 ;; Must not have received the entirety of the chunk header,
981 ;; need to spin some more.
982 (url-http-debug "Did not see start of chunk @ %d!" (point))
983 (setq read-next-chunk nil
))
984 (add-text-properties (match-beginning 0) (match-end 0)
990 (setq url-http-chunked-length
(string-to-number (buffer-substring
994 url-http-chunked-counter
(1+ url-http-chunked-counter
)
995 url-http-chunked-start
(set-marker
996 (or url-http-chunked-start
999 ; (if (not url-http-debug)
1000 (delete-region (match-beginning 0) (match-end 0));)
1001 (url-http-debug "Saw start of chunk %d (length=%d, start=%d"
1002 url-http-chunked-counter url-http-chunked-length
1003 (marker-position url-http-chunked-start
))
1004 (if (= 0 url-http-chunked-length
)
1006 ;; Found the end of the document! Wheee!
1007 (url-http-debug "Saw end of stream chunk!")
1008 (setq read-next-chunk nil
)
1009 (url-display-percentage nil nil
)
1010 ;; Every chunk, even the last 0-length one, is
1011 ;; terminated by CRLF. Skip it.
1012 (when (looking-at "\r?\n")
1013 (url-http-debug "Removing terminator of last chunk")
1014 (delete-region (match-beginning 0) (match-end 0)))
1015 (if (re-search-forward "^\r*$" nil t
)
1016 (url-http-debug "Saw end of trailers..."))
1017 (if (url-http-parse-headers)
1018 (url-http-activate-callback))))))))))
1020 (defun url-http-wait-for-headers-change-function (st nd length
)
1021 ;; This will wait for the headers to arrive and then splice in the
1022 ;; next appropriate after-change-function, etc.
1023 (declare (special url-current-object
1024 url-http-end-of-headers
1025 url-http-content-type
1026 url-http-content-length
1027 url-http-transfer-encoding
1028 url-callback-function
1029 url-callback-arguments
1032 url-http-after-change-function
1033 url-http-response-status
))
1034 (url-http-debug "url-http-wait-for-headers-change-function (%s)"
1037 (let ((end-of-headers nil
)
1039 (content-length nil
))
1040 (goto-char (point-min))
1041 (if (and (looking-at ".*\n") ; have one line at least
1042 (not (looking-at "^HTTP/[1-9]\\.[0-9]")))
1043 ;; Not HTTP/x.y data, must be 0.9
1044 ;; God, I wish this could die.
1045 (setq end-of-headers t
1046 url-http-end-of-headers
0
1048 (when (re-search-forward "^\r*$" nil t
)
1049 ;; Saw the end of the headers
1050 (url-http-debug "Saw end of headers... (%s)" (buffer-name))
1051 (setq url-http-end-of-headers
(set-marker (make-marker)
1054 (url-http-clean-headers)))
1056 (if (not end-of-headers
)
1057 ;; Haven't seen the end of the headers yet, need to wait
1058 ;; for more data to arrive.
1061 (message "HTTP/0.9 How I hate thee!")
1063 (url-http-parse-response)
1064 (mail-narrow-to-head)
1065 ;;(narrow-to-region (point-min) url-http-end-of-headers)
1066 (setq url-http-transfer-encoding
(mail-fetch-field
1067 "transfer-encoding")
1068 url-http-content-type
(mail-fetch-field "content-type"))
1069 (if (mail-fetch-field "content-length")
1070 (setq url-http-content-length
1071 (string-to-number (mail-fetch-field "content-length"))))
1073 (when url-http-transfer-encoding
1074 (setq url-http-transfer-encoding
1075 (downcase url-http-transfer-encoding
)))
1078 ((or (= url-http-response-status
204)
1079 (= url-http-response-status
205))
1080 (url-http-debug "%d response must have headers only (%s)."
1081 url-http-response-status
(buffer-name))
1082 (when (url-http-parse-headers)
1083 (url-http-activate-callback)))
1084 ((string= "HEAD" url-http-method
)
1085 ;; A HEAD request is _ALWAYS_ terminated by the header
1086 ;; information, regardless of any entity headers,
1087 ;; according to section 4.4 of the HTTP/1.1 draft.
1088 (url-http-debug "HEAD request must have headers only (%s)."
1090 (when (url-http-parse-headers)
1091 (url-http-activate-callback)))
1092 ((string= "CONNECT" url-http-method
)
1093 ;; A CONNECT request is finished, but we cannot stick this
1094 ;; back on the free connectin list
1095 (url-http-debug "CONNECT request must have headers only.")
1096 (when (url-http-parse-headers)
1097 (url-http-activate-callback)))
1098 ((equal url-http-response-status
304)
1099 ;; Only allowed to have a header section. We have to handle
1100 ;; this here instead of in url-http-parse-headers because if
1101 ;; you have a cached copy of something without a known
1102 ;; content-length, and try to retrieve it from the cache, we'd
1103 ;; fall into the 'being dumb' section and wait for the
1104 ;; connection to terminate, which means we'd wait for 10
1105 ;; seconds for the keep-alives to time out on some servers.
1106 (when (url-http-parse-headers)
1107 (url-http-activate-callback)))
1109 ;; HTTP/0.9 always signaled end-of-connection by closing the
1112 "Saw HTTP/0.9 response, connection closed means end of document.")
1113 (setq url-http-after-change-function
1114 'url-http-simple-after-change-function
))
1115 ((equal url-http-transfer-encoding
"chunked")
1116 (url-http-debug "Saw chunked encoding.")
1117 (setq url-http-after-change-function
1118 'url-http-chunked-encoding-after-change-function
)
1119 (when (> nd url-http-end-of-headers
)
1121 "Calling initial chunked-encoding for extra data at end of headers")
1122 (url-http-chunked-encoding-after-change-function
1123 (marker-position url-http-end-of-headers
) nd
1124 (- nd url-http-end-of-headers
))))
1125 ((integerp url-http-content-length
)
1127 "Got a content-length, being smart about document end.")
1128 (setq url-http-after-change-function
1129 'url-http-content-length-after-change-function
)
1131 ((= 0 url-http-content-length
)
1132 ;; We got a NULL body! Activate the callback
1135 "Got 0-length content-length, activating callback immediately.")
1136 (when (url-http-parse-headers)
1137 (url-http-activate-callback)))
1138 ((> nd url-http-end-of-headers
)
1139 ;; Have some leftover data
1140 (url-http-debug "Calling initial content-length for extra data at end of headers")
1141 (url-http-content-length-after-change-function
1142 (marker-position url-http-end-of-headers
)
1144 (- nd url-http-end-of-headers
)))
1148 (url-http-debug "No content-length, being dumb.")
1149 (setq url-http-after-change-function
1150 'url-http-simple-after-change-function
)))))
1151 ;; We are still at the beginning of the buffer... must just be
1152 ;; waiting for a response.
1153 (url-http-debug "Spinning waiting for headers..."))
1154 (goto-char (point-max)))
1157 (defun url-http (url callback cbargs
)
1158 "Retrieve URL via HTTP asynchronously.
1159 URL must be a parsed URL. See `url-generic-parse-url' for details.
1160 When retrieval is completed, the function CALLBACK is executed with
1161 CBARGS as the arguments."
1162 (check-type url vector
"Need a pre-parsed URL.")
1163 (declare (special url-current-object
1164 url-http-end-of-headers
1165 url-http-content-type
1166 url-http-content-length
1167 url-http-transfer-encoding
1168 url-http-after-change-function
1169 url-callback-function
1170 url-callback-arguments
1172 url-http-extra-headers
1174 url-http-chunked-length
1175 url-http-chunked-start
1176 url-http-chunked-counter
1178 (let* ((host (url-host (or url-using-proxy url
)))
1179 (port (url-port (or url-using-proxy url
)))
1180 (connection (url-http-find-free-connection host port
))
1181 (buffer (generate-new-buffer (format " *http %s:%d*" host port
))))
1182 (if (not connection
)
1183 ;; Failed to open the connection for some reason
1185 (kill-buffer buffer
)
1187 (error "Could not create connection to %s:%d" host port
))
1188 (with-current-buffer buffer
1189 (mm-disable-multibyte)
1190 (setq url-current-object url
1191 mode-line-format
"%b [%s]")
1193 (dolist (var '(url-http-end-of-headers
1194 url-http-content-type
1195 url-http-content-length
1196 url-http-transfer-encoding
1197 url-http-after-change-function
1198 url-http-response-version
1199 url-http-response-status
1200 url-http-chunked-length
1201 url-http-chunked-counter
1202 url-http-chunked-start
1203 url-callback-function
1204 url-callback-arguments
1207 url-http-extra-headers
1210 url-http-connection-opened
1212 (set (make-local-variable var
) nil
))
1214 (setq url-http-method
(or url-request-method
"GET")
1215 url-http-extra-headers url-request-extra-headers
1216 url-http-data url-request-data
1217 url-http-process connection
1218 url-http-chunked-length nil
1219 url-http-chunked-start nil
1220 url-http-chunked-counter
0
1221 url-callback-function callback
1222 url-callback-arguments cbargs
1223 url-http-after-change-function
'url-http-wait-for-headers-change-function
1224 url-http-target-url url-current-object
1225 url-http-connection-opened nil
1226 url-http-proxy url-using-proxy
)
1228 (set-process-buffer connection buffer
)
1229 (set-process-filter connection
'url-http-generic-filter
)
1230 (let ((status (process-status connection
)))
1232 ((eq status
'connect
)
1233 ;; Asynchronous connection
1234 (set-process-sentinel connection
'url-http-async-sentinel
))
1235 ((eq status
'failed
)
1236 ;; Asynchronous connection failed
1237 (error "Could not create connection to %s:%d" host port
))
1239 (set-process-sentinel connection
'url-http-end-of-document-sentinel
)
1240 (process-send-string connection
(url-http-create-request)))))))
1243 (defun url-http-async-sentinel (proc why
)
1244 (declare (special url-callback-arguments
))
1245 ;; We are performing an asynchronous connection, and a status change
1247 (with-current-buffer (process-buffer proc
)
1249 (url-http-connection-opened
1250 (url-http-end-of-document-sentinel proc why
))
1251 ((string= (substring why
0 4) "open")
1252 (setq url-http-connection-opened t
)
1253 (process-send-string proc
(url-http-create-request)))
1255 (setf (car url-callback-arguments
)
1256 (nconc (list :error
(list 'error
'connection-failed why
1257 :host
(url-host (or url-http-proxy url-current-object
))
1258 :service
(url-port (or url-http-proxy url-current-object
))))
1259 (car url-callback-arguments
)))
1260 (url-http-activate-callback)))))
1262 ;; Since Emacs 19/20 does not allow you to change the
1263 ;; `after-change-functions' hook in the midst of running them, we fake
1264 ;; an after change by hooking into the process filter and inserting
1265 ;; the data ourselves. This is slightly less efficient, but there
1266 ;; were tons of weird ways the after-change code was biting us in the
1268 (defun url-http-generic-filter (proc data
)
1269 ;; Sometimes we get a zero-length data chunk after the process has
1270 ;; been changed to 'free', which means it has no buffer associated
1271 ;; with it. Do nothing if there is no buffer, or 0 length data.
1272 (declare (special url-http-after-change-function
))
1273 (and (process-buffer proc
)
1274 (/= (length data
) 0)
1275 (with-current-buffer (process-buffer proc
)
1276 (url-http-debug "Calling after change function `%s' for `%S'" url-http-after-change-function proc
)
1277 (funcall url-http-after-change-function
1280 (goto-char (point-max))
1285 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
1286 ;;; file-name-handler stuff from here on out
1287 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
1288 (defalias 'url-http-symbol-value-in-buffer
1289 (if (fboundp 'symbol-value-in-buffer
)
1290 'symbol-value-in-buffer
1291 (lambda (symbol buffer
&optional unbound-value
)
1292 "Return the value of SYMBOL in BUFFER, or UNBOUND-VALUE if it is unbound."
1293 (with-current-buffer buffer
1294 (if (not (boundp symbol
))
1296 (symbol-value symbol
))))))
1298 (defun url-http-head (url)
1299 (let ((url-request-method "HEAD")
1300 (url-request-data nil
))
1301 (url-retrieve-synchronously url
)))
1304 (defun url-http-file-exists-p (url)
1307 (buffer (url-http-head url
)))
1310 (setq status
(url-http-symbol-value-in-buffer 'url-http-response-status
1312 exists
(and (integerp status
)
1313 (>= status
200) (< status
300)))
1314 (kill-buffer buffer
))
1318 (defalias 'url-http-file-readable-p
'url-http-file-exists-p
)
1320 (defun url-http-head-file-attributes (url &optional id-format
)
1321 (let ((buffer (url-http-head url
)))
1325 nil
;dir / link / normal file
1326 1 ;number of links to file.
1328 nil nil nil
;atime ; mtime ; ctime
1329 (url-http-symbol-value-in-buffer 'url-http-content-length
1331 (eval-when-compile (make-string 10 ?-
))
1332 nil nil nil
) ;whether gid would change ; inode ; device.
1333 (kill-buffer buffer
)))))
1335 (declare-function url-dav-file-attributes
"url-dav" (url &optional id-format
))
1338 (defun url-http-file-attributes (url &optional id-format
)
1339 (if (url-dav-supported-p url
)
1340 (url-dav-file-attributes url id-format
)
1341 (url-http-head-file-attributes url id-format
)))
1344 (defun url-http-options (url)
1345 "Return a property list describing options available for URL.
1346 This list is retrieved using the `OPTIONS' HTTP method.
1348 Property list members:
1351 A list of symbols specifying what HTTP methods the resource
1355 A list of numbers specifying what DAV protocol/schema versions are
1359 A list of supported DASL search types supported (string form)
1362 A list of the units available for use in partial document fetches.
1365 The `Platform For Privacy Protection' description for the resource.
1366 Currently this is just the raw header contents. This is likely to
1367 change once P3P is formally supported by the URL package or
1369 (let* ((url-request-method "OPTIONS")
1370 (url-request-data nil
)
1371 (buffer (url-retrieve-synchronously url
))
1374 (when (and buffer
(= 2 (/ (url-http-symbol-value-in-buffer
1375 'url-http-response-status buffer
0) 100)))
1376 ;; Only parse the options if we got a 2xx response code!
1377 (with-current-buffer buffer
1380 (mail-narrow-to-head)
1382 ;; Figure out what methods are supported.
1383 (when (setq header
(mail-fetch-field "allow"))
1384 (setq options
(plist-put
1386 (mapcar 'intern
(split-string header
"[ ,]+")))))
1389 (when (setq header
(mail-fetch-field "dav"))
1390 (setq options
(plist-put
1393 (mapcar 'string-to-number
1394 (split-string header
"[, ]+"))))))
1397 (when (setq header
(mail-fetch-field "dasl"))
1398 (setq options
(plist-put
1400 (split-string header
"[, ]+"))))
1402 ;; P3P - should get more detailed here. FIXME
1403 (when (setq header
(mail-fetch-field "p3p"))
1404 (setq options
(plist-put options
'p3p header
)))
1406 ;; Check for whether they accept byte-range requests.
1407 (when (setq header
(mail-fetch-field "accept-ranges"))
1408 (setq options
(plist-put
1412 (split-string header
"[, ]+"))))))
1414 (if buffer
(kill-buffer buffer
))
1417 ;; HTTPS. This used to be in url-https.el, but that file collides
1418 ;; with url-http.el on systems with 8-character file names.
1422 (defconst url-https-default-port
443 "Default HTTPS port.")
1424 (defconst url-https-asynchronous-p t
"HTTPS retrievals are asynchronous.")
1426 ;; FIXME what is the point of this alias being an autoload?
1427 ;; Trying to use it will not cause url-http to be loaded,
1428 ;; since the full alias just gets dumped into loaddefs.el.
1430 ;;;###autoload (autoload 'url-default-expander "url-expand")
1432 (defalias 'url-https-expand-file-name
'url-default-expander
)
1434 (defmacro url-https-create-secure-wrapper
(method args
)
1435 `(defun ,(intern (format (if method
"url-https-%s" "url-https") method
)) ,args
1436 ,(format "HTTPS wrapper around `%s' call." (or method
"url-http"))
1437 (let ((url-gateway-method 'tls
))
1438 (,(intern (format (if method
"url-http-%s" "url-http") method
))
1439 ,@(remove '&rest
(remove '&optional args
))))))
1441 ;;;###autoload (autoload 'url-https "url-http")
1442 (url-https-create-secure-wrapper nil
(url callback cbargs
))
1443 ;;;###autoload (autoload 'url-https-file-exists-p "url-http")
1444 (url-https-create-secure-wrapper file-exists-p
(url))
1445 ;;;###autoload (autoload 'url-https-file-readable-p "url-http")
1446 (url-https-create-secure-wrapper file-readable-p
(url))
1447 ;;;###autoload (autoload 'url-https-file-attributes "url-http")
1448 (url-https-create-secure-wrapper file-attributes
(url &optional id-format
))
1452 ;; arch-tag: ba7c59ae-c0f4-4a31-9617-d85f221732ee
1453 ;;; url-http.el ends here