1 ;;; url-http.el --- HTTP retrieval routines
3 ;; Copyright (C) 1999, 2001, 2004-2014 Free Software Foundation, Inc.
5 ;; Author: Bill Perry <wmperry@gnu.org>
6 ;; Maintainer: emacs-devel@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-lib
))
30 (defvar url-callback-arguments
)
31 (defvar url-callback-function
)
32 (defvar url-current-object
)
33 (defvar url-http-after-change-function
)
34 (defvar url-http-chunked-counter
)
35 (defvar url-http-chunked-length
)
36 (defvar url-http-chunked-start
)
37 (defvar url-http-connection-opened
)
38 (defvar url-http-content-length
)
39 (defvar url-http-content-type
)
40 (defvar url-http-data
)
41 (defvar url-http-end-of-headers
)
42 (defvar url-http-extra-headers
)
43 (defvar url-http-method
)
44 (defvar url-http-no-retry
)
45 (defvar url-http-process
)
46 (defvar url-http-proxy
)
47 (defvar url-http-response-status
)
48 (defvar url-http-response-version
)
49 (defvar url-http-target-url
)
50 (defvar url-http-transfer-encoding
)
51 (defvar url-show-status
)
59 (autoload 'url-cache-create-filename
"url-cache")
61 (defconst url-http-default-port
80 "Default HTTP port.")
62 (defconst url-http-asynchronous-p t
"HTTP retrievals are asynchronous.")
63 (defalias 'url-http-expand-file-name
'url-default-expander
)
65 (defvar url-http-real-basic-auth-storage nil
)
66 (defvar url-http-proxy-basic-auth-storage nil
)
68 (defvar url-http-open-connections
(make-hash-table :test
'equal
70 "A hash table of all open network connections.")
72 (defvar url-http-version
"1.1"
73 "What version of HTTP we advertise, as a string.
74 Valid values are 1.1 and 1.0.
75 This is only useful when debugging the HTTP subsystem.
77 Setting this to 1.0 will tell servers not to send chunked encoding,
78 and other HTTP/1.1 specific features.")
80 (defvar url-http-attempt-keepalives t
81 "Whether to use a single TCP connection multiple times in HTTP.
82 This is only useful when debugging the HTTP subsystem. Setting to
83 nil will explicitly close the connection to the server after every
86 (defconst url-http-codes
87 '((100 continue
"Continue with request")
88 (101 switching-protocols
"Switching protocols")
89 (102 processing
"Processing (Added by DAV)")
91 (201 created
"Created")
92 (202 accepted
"Accepted")
93 (203 non-authoritative
"Non-authoritative information")
94 (204 no-content
"No content")
95 (205 reset-content
"Reset content")
96 (206 partial-content
"Partial content")
97 (207 multi-status
"Multi-status (Added by DAV)")
98 (300 multiple-choices
"Multiple choices")
99 (301 moved-permanently
"Moved permanently")
101 (303 see-other
"See other")
102 (304 not-modified
"Not modified")
103 (305 use-proxy
"Use proxy")
104 (307 temporary-redirect
"Temporary redirect")
105 (400 bad-request
"Bad Request")
106 (401 unauthorized
"Unauthorized")
107 (402 payment-required
"Payment required")
108 (403 forbidden
"Forbidden")
109 (404 not-found
"Not found")
110 (405 method-not-allowed
"Method not allowed")
111 (406 not-acceptable
"Not acceptable")
112 (407 proxy-authentication-required
"Proxy authentication required")
113 (408 request-timeout
"Request time-out")
114 (409 conflict
"Conflict")
116 (411 length-required
"Length required")
117 (412 precondition-failed
"Precondition failed")
118 (413 request-entity-too-large
"Request entity too large")
119 (414 request-uri-too-large
"Request-URI too large")
120 (415 unsupported-media-type
"Unsupported media type")
121 (416 requested-range-not-satisfiable
"Requested range not satisfiable")
122 (417 expectation-failed
"Expectation failed")
123 (422 unprocessable-entity
"Unprocessable Entity (Added by DAV)")
124 (423 locked
"Locked")
125 (424 failed-Dependency
"Failed Dependency")
126 (500 internal-server-error
"Internal server error")
127 (501 not-implemented
"Not implemented")
128 (502 bad-gateway
"Bad gateway")
129 (503 service-unavailable
"Service unavailable")
130 (504 gateway-timeout
"Gateway time-out")
131 (505 http-version-not-supported
"HTTP version not supported")
132 (507 insufficient-storage
"Insufficient storage"))
133 "The HTTP return codes and their text.")
136 ;; These are all macros so that they are hidden from external sight
137 ;; when the file is byte-compiled.
139 ;; This allows us to expose just the entry points we want.
141 ;; These routines will allow us to implement persistent HTTP
143 (defsubst url-http-debug
(&rest args
)
145 (let ((proc (get-buffer-process (current-buffer))))
146 ;; The user hit C-g, honor it! Some things can get in an
147 ;; incredibly tight loop (chunked encoding)
150 (set-process-sentinel proc nil
)
151 (set-process-filter proc nil
)))
152 (error "Transfer interrupted!")))
153 (apply 'url-debug
'http args
))
155 (defun url-http-mark-connection-as-busy (host port proc
)
156 (url-http-debug "Marking connection as busy: %s:%d %S" host port proc
)
157 (set-process-query-on-exit-flag proc t
)
158 (puthash (cons host port
)
159 (delq proc
(gethash (cons host port
) url-http-open-connections
))
160 url-http-open-connections
)
163 (defun url-http-mark-connection-as-free (host port proc
)
164 (url-http-debug "Marking connection as free: %s:%d %S" host port proc
)
165 (when (memq (process-status proc
) '(open run connect
))
166 (set-process-buffer proc nil
)
167 (set-process-sentinel proc
'url-http-idle-sentinel
)
168 (set-process-query-on-exit-flag proc nil
)
169 (puthash (cons host port
)
170 (cons proc
(gethash (cons host port
) url-http-open-connections
))
171 url-http-open-connections
))
174 (defun url-http-find-free-connection (host port
)
175 (let ((conns (gethash (cons host port
) url-http-open-connections
))
177 (while (and conns
(not connection
))
178 (if (not (memq (process-status (car conns
)) '(run open connect
)))
180 (url-http-debug "Cleaning up dead process: %s:%d %S"
181 host port
(car conns
))
182 (url-http-idle-sentinel (car conns
) nil
))
183 (setq connection
(car conns
))
184 (url-http-debug "Found existing connection: %s:%d %S" host port connection
))
187 (url-http-debug "Reusing existing connection: %s:%d" host port
)
188 (url-http-debug "Contacting host: %s:%d" host port
))
189 (url-lazy-message "Contacting host: %s:%d" host port
)
192 (let ((buf (generate-new-buffer " *url-http-temp*")))
193 ;; `url-open-stream' needs a buffer in which to do things
194 ;; like authentication. But we use another buffer afterwards.
196 (let ((proc (url-open-stream host buf host port
)))
197 ;; url-open-stream might return nil.
198 (when (processp proc
)
199 ;; Drop the temp buffer link before killing the buffer.
200 (set-process-buffer proc nil
)
201 (setq connection proc
)))
202 ;; If there was an error on connect, make sure we don't
204 (when (get-buffer-process buf
)
205 (set-process-query-on-exit-flag (get-buffer-process buf
) nil
))
209 (url-http-mark-connection-as-busy host port connection
))))
211 ;; Building an HTTP request
212 (defun url-http-user-agent-string ()
213 (if (or (eq url-privacy-level
'paranoid
)
214 (and (listp url-privacy-level
)
215 (memq 'agent url-privacy-level
)))
217 (format "User-Agent: %sURL/%s\r\n"
219 (concat url-package-name
"/" url-package-version
" ")
223 (defun url-http-create-request (&optional ref-url
)
224 "Create an HTTP request for `url-http-target-url', referred to by REF-URL."
225 (let* ((extra-headers)
227 (no-cache (cdr-safe (assoc "Pragma" url-http-extra-headers
)))
228 (using-proxy url-http-proxy
)
229 (proxy-auth (if (or (cdr-safe (assoc "Proxy-Authorization"
230 url-http-extra-headers
))
233 (let ((url-basic-auth-storage
234 'url-http-proxy-basic-auth-storage
))
235 (url-get-authentication url-http-proxy nil
'any nil
))))
236 (real-fname (url-filename url-http-target-url
))
237 (host (url-host url-http-target-url
))
238 (auth (if (cdr-safe (assoc "Authorization" url-http-extra-headers
))
240 (url-get-authentication (or
241 (and (boundp 'proxy-info
)
243 url-http-target-url
) nil
'any nil
))))
244 (if (equal "" real-fname
)
245 (setq real-fname
"/"))
246 (setq no-cache
(and no-cache
(string-match "no-cache" no-cache
)))
248 (setq auth
(concat "Authorization: " auth
"\r\n")))
250 (setq proxy-auth
(concat "Proxy-Authorization: " proxy-auth
"\r\n")))
252 ;; Protection against stupid values in the referrer
253 (if (and ref-url
(stringp ref-url
) (or (string= ref-url
"file:nil")
254 (string= ref-url
"")))
257 ;; We do not want to expose the referrer if the user is paranoid.
258 (if (or (memq url-privacy-level
'(low high paranoid
))
259 (and (listp url-privacy-level
)
260 (memq 'lastloc url-privacy-level
)))
263 ;; url-http-extra-headers contains an assoc-list of
264 ;; header/value pairs that we need to put into the request.
265 (setq extra-headers
(mapconcat
267 (concat (car x
) ": " (cdr x
)))
268 url-http-extra-headers
"\r\n"))
269 (if (not (equal extra-headers
""))
270 (setq extra-headers
(concat extra-headers
"\r\n")))
272 ;; This was done with a call to `format'. Concatenating parts has
273 ;; the advantage of keeping the parts of each header together and
274 ;; allows us to elide null lines directly, at the cost of making
275 ;; the layout less clear.
277 ;; We used to concat directly, but if one of the strings happens
278 ;; to being multibyte (even if it only contains pure ASCII) then
279 ;; every string gets converted with `string-MAKE-multibyte' which
280 ;; turns the 127-255 codes into things like latin-1 accented chars
281 ;; (it would work right if it used `string-TO-multibyte' instead).
282 ;; So to avoid the problem we force every string to be unibyte.
284 ;; FIXME: Instead of `string-AS-unibyte' we'd want
285 ;; `string-to-unibyte', so as to properly signal an error if one
286 ;; of the strings contains a multibyte char.
291 (or url-http-method
"GET") " "
292 (if using-proxy
(url-recreate-url url-http-target-url
) real-fname
)
293 " HTTP/" url-http-version
"\r\n"
294 ;; Version of MIME we speak
295 "MIME-Version: 1.0\r\n"
296 ;; (maybe) Try to keep the connection open
297 "Connection: " (if (or using-proxy
298 (not url-http-attempt-keepalives
))
299 "close" "keep-alive") "\r\n"
300 ;; HTTP extensions we support
301 (if url-extensions-header
303 "Extension: %s\r\n" url-extensions-header
))
304 ;; Who we want to talk to
305 (if (/= (url-port url-http-target-url
)
306 (url-scheme-get-property
307 (url-type url-http-target-url
) 'default-port
))
309 "Host: %s:%d\r\n" host
(url-port url-http-target-url
))
310 (format "Host: %s\r\n" host
))
312 (if url-personal-mail-address
314 "From: " url-personal-mail-address
"\r\n"))
315 ;; Encodings we understand
316 (if url-mime-encoding-string
318 "Accept-encoding: " url-mime-encoding-string
"\r\n"))
319 (if url-mime-charset-string
321 "Accept-charset: " url-mime-charset-string
"\r\n"))
322 ;; Languages we understand
323 (if url-mime-language-string
325 "Accept-language: " url-mime-language-string
"\r\n"))
326 ;; Types we understand
327 "Accept: " (or url-mime-accept-string
"*/*") "\r\n"
329 (url-http-user-agent-string)
330 ;; Proxy Authorization
335 (when (url-use-cookies url-http-target-url
)
336 (url-cookie-generate-header-lines
338 (equal "https" (url-type url-http-target-url
))))
340 (if (and (not no-cache
)
341 (member url-http-method
'("GET" nil
)))
342 (let ((tm (url-is-cached url-http-target-url
)))
344 (concat "If-modified-since: "
345 (url-get-normalized-date tm
) "\r\n"))))
348 "Referer: " ref-url
"\r\n"))
353 "Content-length: " (number-to-string
354 (length url-http-data
))
361 (url-http-debug "Request is: \n%s" request
)
365 (defun url-http-clean-headers ()
366 "Remove trailing \r from header lines.
367 This allows us to use `mail-fetch-field', etc.
368 Return the number of characters removed."
369 (let ((end (marker-position url-http-end-of-headers
)))
370 (goto-char (point-min))
371 (while (re-search-forward "\r$" url-http-end-of-headers t
)
373 (- end url-http-end-of-headers
)))
375 (defun url-http-handle-authentication (proxy)
376 (url-http-debug "Handling %s authentication" (if proxy
"proxy" "normal"))
377 (let ((auths (or (nreverse
379 (if proxy
"proxy-authenticate" "www-authenticate")
383 (url (url-recreate-url url-current-object
))
384 (auth-url (url-recreate-url
385 (if (and proxy
(boundp 'url-http-proxy
))
387 url-current-object
)))
388 (url-basic-auth-storage (if proxy
389 ;; Cheating, but who cares? :)
390 'url-http-proxy-basic-auth-storage
391 'url-http-real-basic-auth-storage
))
395 ;; find strongest supported auth
396 (dolist (this-auth auths
)
397 (setq this-auth
(url-eat-trailing-space
398 (url-strip-leading-spaces
401 (downcase (if (string-match "[ \t]" this-auth
)
402 (substring this-auth
0 (match-beginning 0))
404 (registered (url-auth-registered this-type
))
405 (this-strength (cddr registered
)))
406 (when (and registered
(> this-strength strength
))
409 strength this-strength
))))
411 (if (not (url-auth-registered type
))
414 (goto-char (point-max))
415 (insert "<hr>Sorry, but I do not know how to handle " type
416 " authentication. If you'd like to write it,"
417 " please use M-x report-emacs-bug RET.<hr>")
418 ;; We used to set a `status' var (declared "special") but I can't
419 ;; find the corresponding let-binding, so it's probably an error.
420 ;; FIXME: Maybe it was supposed to set `success', i.e. to return t?
422 nil
) ;; Not success yet.
424 (let* ((args (url-parse-args (subst-char-in-string ?
, ?\
; auth)))
425 (auth (url-get-authentication auth-url
426 (cdr-safe (assoc "realm" args
))
430 (push (cons (if proxy
"Proxy-Authorization" "Authorization") auth
)
431 url-http-extra-headers
)
432 (let ((url-request-method url-http-method
)
433 (url-request-data url-http-data
)
434 (url-request-extra-headers url-http-extra-headers
))
435 (url-retrieve-internal url url-callback-function
436 url-callback-arguments
))
437 nil
))))) ;; Not success yet.
439 (defun url-http-parse-response ()
440 "Parse just the response code."
441 (if (not url-http-end-of-headers
)
442 (error "Trying to parse HTTP response code in odd buffer: %s" (buffer-name)))
443 (url-http-debug "url-http-parse-response called in (%s)" (buffer-name))
444 (goto-char (point-min))
445 (skip-chars-forward " \t\n") ; Skip any blank crap
446 (skip-chars-forward "HTTP/") ; Skip HTTP Version
447 (setq url-http-response-version
448 (buffer-substring (point)
450 (skip-chars-forward "[0-9].")
452 (setq url-http-response-status
(read (current-buffer))))
454 (defun url-http-handle-cookies ()
455 "Handle all set-cookie / set-cookie2 headers in an HTTP response.
456 The buffer must already be narrowed to the headers, so `mail-fetch-field' will
458 (let ((cookies (nreverse (mail-fetch-field "Set-Cookie" nil nil t
)))
459 (cookies2 (nreverse (mail-fetch-field "Set-Cookie2" nil nil t
))))
460 (and cookies
(url-http-debug "Found %d Set-Cookie headers" (length cookies
)))
461 (and cookies2
(url-http-debug "Found %d Set-Cookie2 headers" (length cookies2
)))
463 (url-cookie-handle-set-cookie (pop cookies
)))
465 ;;; (url-cookie-handle-set-cookie2 (pop cookies)))
469 (defun url-http-parse-headers ()
470 "Parse and handle HTTP specific headers.
471 Return t if and only if the current buffer is still active and
472 should be shown to the user."
473 ;; The comments after each status code handled are taken from RFC
475 (url-http-mark-connection-as-free (url-host url-current-object
)
476 (url-port url-current-object
)
479 (if (or (not (boundp 'url-http-end-of-headers
))
480 (not url-http-end-of-headers
))
481 (error "Trying to parse headers in odd buffer: %s" (buffer-name)))
482 (goto-char (point-min))
483 (url-http-debug "url-http-parse-headers called in (%s)" (buffer-name))
484 (url-http-parse-response)
485 (mail-narrow-to-head)
486 ;;(narrow-to-region (point-min) url-http-end-of-headers)
487 (let ((connection (mail-fetch-field "Connection")))
488 ;; In HTTP 1.0, keep the connection only if there is a
489 ;; "Connection: keep-alive" header.
490 ;; In HTTP 1.1 (and greater), keep the connection unless there is a
491 ;; "Connection: close" header
493 ((string= url-http-response-version
"1.0")
494 (unless (and connection
495 (string= (downcase connection
) "keep-alive"))
496 (delete-process url-http-process
)))
498 (when (and connection
499 (string= (downcase connection
) "close"))
500 (delete-process url-http-process
)))))
501 (let* ((buffer (current-buffer))
502 (class (/ url-http-response-status
100))
504 ;; other status symbols: jewelry and luxury cars
505 (status-symbol (cadr (assq url-http-response-status url-http-codes
))))
506 (url-http-debug "Parsed HTTP headers: class=%d status=%d"
507 class url-http-response-status
)
508 (when (url-use-cookies url-http-target-url
)
509 (url-http-handle-cookies))
512 ;; Classes of response codes
514 ;; 5xx = Server Error
515 ;; 4xx = Client Error
518 ;; 1xx = Informational
519 (1 ; Information messages
520 ;; 100 = Continue with request
521 ;; 101 = Switching protocols
522 ;; 102 = Processing (Added by DAV)
523 (url-mark-buffer-as-dead buffer
)
524 (error "HTTP responses in class 1xx not supported (%d)"
525 url-http-response-status
))
530 ;; 203 Non-authoritative information
533 ;; 206 Partial content
534 ;; 207 Multi-status (Added by DAV)
536 ((or `no-content
`reset-content
)
537 ;; No new data, just stay at the same document
538 (url-mark-buffer-as-dead buffer
))
540 ;; Generic success for all others. Store in the cache, and
541 ;; mark it as successful.
543 (if (and url-automatic-caching
(equal url-http-method
"GET"))
544 (url-store-in-cache buffer
))))
547 ;; 300 Multiple choices
548 ;; 301 Moved permanently
553 ;; 307 Temporary redirect
554 (let ((redirect-uri (or (mail-fetch-field "Location")
555 (mail-fetch-field "URI"))))
557 (`multiple-choices
; 300
558 ;; Quoth the spec (section 10.3.1)
559 ;; -------------------------------
560 ;; The requested resource corresponds to any one of a set of
561 ;; representations, each with its own specific location and
562 ;; agent-driven negotiation information is being provided so
563 ;; that the user can select a preferred representation and
564 ;; redirect its request to that location.
566 ;; If the server has a preferred choice of representation, it
567 ;; SHOULD include the specific URI for that representation in
568 ;; the Location field; user agents MAY use the Location field
569 ;; value for automatic redirection.
570 ;; -------------------------------
571 ;; We do not support agent-driven negotiation, so we just
572 ;; redirect to the preferred URI if one is provided.
574 ((or `moved-permanently
`found
`temporary-redirect
) ; 301 302 307
575 ;; If the 301|302 status code is received in response to a
576 ;; request other than GET or HEAD, the user agent MUST NOT
577 ;; automatically redirect the request unless it can be
578 ;; confirmed by the user, since this might change the
579 ;; conditions under which the request was issued.
580 (unless (member url-http-method
'("HEAD" "GET"))
581 (setq redirect-uri nil
)))
583 ;; The response to the request can be found under a different
584 ;; URI and SHOULD be retrieved using a GET method on that
586 (setq url-http-method
"GET"
589 ;; The 304 response MUST NOT contain a message-body.
590 (url-http-debug "Extracting document from cache... (%s)"
591 (url-cache-create-filename (url-view-url t
)))
592 (url-cache-extract (url-cache-create-filename (url-view-url t
)))
593 (setq redirect-uri nil
596 ;; The requested resource MUST be accessed through the
597 ;; proxy given by the Location field. The Location field
598 ;; gives the URI of the proxy. The recipient is expected
599 ;; to repeat this single request via the proxy. 305
600 ;; responses MUST only be generated by origin servers.
601 (error "Redirection thru a proxy server not supported: %s"
604 ;; Treat everything like '300'
607 ;; Clean off any whitespace and/or <...> cruft.
608 (if (string-match "\\([^ \t]+\\)[ \t]" redirect-uri
)
609 (setq redirect-uri
(match-string 1 redirect-uri
)))
610 (if (string-match "^<\\(.*\\)>$" redirect-uri
)
611 (setq redirect-uri
(match-string 1 redirect-uri
)))
613 ;; Some stupid sites (like sourceforge) send a
614 ;; non-fully-qualified URL (ie: /), which royally confuses
616 (if (not (string-match url-nonrelative-link redirect-uri
))
617 ;; Be careful to use the real target URL, otherwise we may
618 ;; compute the redirection relative to the URL of the proxy.
620 (url-expand-file-name redirect-uri url-http-target-url
)))
621 (let ((url-request-method url-http-method
)
622 (url-request-data url-http-data
)
623 (url-request-extra-headers url-http-extra-headers
))
624 ;; Check existing number of redirects
625 (if (or (< url-max-redirections
0)
626 (and (> url-max-redirections
0)
627 (let ((events (car url-callback-arguments
))
630 (if (eq (car events
) :redirect
)
631 (setq old-redirects
(1+ old-redirects
)))
632 (and (setq events
(cdr events
))
633 (setq events
(cdr events
))))
634 (< old-redirects url-max-redirections
))))
635 ;; url-max-redirections hasn't been reached, so go
636 ;; ahead and redirect.
638 ;; Remember that the request was redirected.
639 (setf (car url-callback-arguments
)
640 (nconc (list :redirect redirect-uri
)
641 (car url-callback-arguments
)))
642 ;; Put in the current buffer a forwarding pointer to the new
643 ;; destination buffer.
644 ;; FIXME: This is a hack to fix url-retrieve-synchronously
645 ;; without changing the API. Instead url-retrieve should
646 ;; either simply not return the "destination" buffer, or it
647 ;; should take an optional `dest-buf' argument.
648 (set (make-local-variable 'url-redirect-buffer
)
649 (url-retrieve-internal
650 redirect-uri url-callback-function
651 url-callback-arguments
652 (url-silent url-current-object
)
653 (not (url-use-cookies url-current-object
))))
654 (url-mark-buffer-as-dead buffer
))
655 ;; We hit url-max-redirections, so issue an error and
657 (url-http-debug "Maximum redirections reached")
658 (setf (car url-callback-arguments
)
659 (nconc (list :error
(list 'error
'http-redirect-limit
661 (car url-callback-arguments
)))
662 (setq success t
))))))
666 ;; 402 Payment required
669 ;; 405 Method not allowed
670 ;; 406 Not acceptable
671 ;; 407 Proxy authentication required
672 ;; 408 Request time-out
675 ;; 411 Length required
676 ;; 412 Precondition failed
677 ;; 413 Request entity too large
678 ;; 414 Request-URI too large
679 ;; 415 Unsupported media type
680 ;; 416 Requested range not satisfiable
681 ;; 417 Expectation failed
682 ;; 422 Unprocessable Entity (Added by DAV)
684 ;; 424 Failed Dependency
688 ;; The request requires user authentication. The response
689 ;; MUST include a WWW-Authenticate header field containing a
690 ;; challenge applicable to the requested resource. The
691 ;; client MAY repeat the request with a suitable
692 ;; Authorization header field.
693 (url-http-handle-authentication nil
))
694 (`payment-required
; 402
695 ;; This code is reserved for future use
696 (url-mark-buffer-as-dead buffer
)
697 (error "Somebody wants you to give them money"))
699 ;; The server understood the request, but is refusing to
700 ;; fulfill it. Authorization will not help and the request
701 ;; SHOULD NOT be repeated.
706 (`method-not-allowed
; 405
707 ;; The method specified in the Request-Line is not allowed
708 ;; for the resource identified by the Request-URI. The
709 ;; response MUST include an Allow header containing a list of
710 ;; valid methods for the requested resource.
712 (`not-acceptable
; 406
713 ;; The resource identified by the request is only capable of
714 ;; generating response entities which have content
715 ;; characteristics not acceptable according to the accept
716 ;; headers sent in the request.
718 (`proxy-authentication-required
; 407
719 ;; This code is similar to 401 (Unauthorized), but indicates
720 ;; that the client must first authenticate itself with the
721 ;; proxy. The proxy MUST return a Proxy-Authenticate header
722 ;; field containing a challenge applicable to the proxy for
723 ;; the requested resource.
724 (url-http-handle-authentication t
))
725 (`request-timeout
; 408
726 ;; The client did not produce a request within the time that
727 ;; the server was prepared to wait. The client MAY repeat
728 ;; the request without modifications at any later time.
731 ;; The request could not be completed due to a conflict with
732 ;; the current state of the resource. This code is only
733 ;; allowed in situations where it is expected that the user
734 ;; might be able to resolve the conflict and resubmit the
735 ;; request. The response body SHOULD include enough
736 ;; information for the user to recognize the source of the
740 ;; The requested resource is no longer available at the
741 ;; server and no forwarding address is known.
743 (`length-required
; 411
744 ;; The server refuses to accept the request without a defined
745 ;; Content-Length. The client MAY repeat the request if it
746 ;; adds a valid Content-Length header field containing the
747 ;; length of the message-body in the request message.
749 ;; NOTE - this will never happen because
750 ;; `url-http-create-request' automatically calculates the
753 (`precondition-failed
; 412
754 ;; The precondition given in one or more of the
755 ;; request-header fields evaluated to false when it was
756 ;; tested on the server.
758 ((or `request-entity-too-large
`request-uri-too-large
) ; 413 414
759 ;; The server is refusing to process a request because the
760 ;; request entity|URI is larger than the server is willing or
763 (`unsupported-media-type
; 415
764 ;; The server is refusing to service the request because the
765 ;; entity of the request is in a format not supported by the
766 ;; requested resource for the requested method.
768 (`requested-range-not-satisfiable
; 416
769 ;; A server SHOULD return a response with this status code if
770 ;; a request included a Range request-header field, and none
771 ;; of the range-specifier values in this field overlap the
772 ;; current extent of the selected resource, and the request
773 ;; did not include an If-Range request-header field.
775 (`expectation-failed
; 417
776 ;; The expectation given in an Expect request-header field
777 ;; could not be met by this server, or, if the server is a
778 ;; proxy, the server has unambiguous evidence that the
779 ;; request could not be met by the next-hop server.
782 ;; The request could not be understood by the server due to
783 ;; malformed syntax. The client SHOULD NOT repeat the
784 ;; request without modifications.
786 ;; Tell the callback that an error occurred, and what the
789 (setf (car url-callback-arguments
)
790 (nconc (list :error
(list 'error
'http url-http-response-status
))
791 (car url-callback-arguments
)))))
793 ;; 500 Internal server error
794 ;; 501 Not implemented
796 ;; 503 Service unavailable
797 ;; 504 Gateway time-out
798 ;; 505 HTTP version not supported
799 ;; 507 Insufficient storage
801 (pcase url-http-response-status
802 (`not-implemented
; 501
803 ;; The server does not support the functionality required to
804 ;; fulfill the request.
807 ;; The server, while acting as a gateway or proxy, received
808 ;; an invalid response from the upstream server it accessed
809 ;; in attempting to fulfill the request.
811 (`service-unavailable
; 503
812 ;; The server is currently unable to handle the request due
813 ;; to a temporary overloading or maintenance of the server.
814 ;; The implication is that this is a temporary condition
815 ;; which will be alleviated after some delay. If known, the
816 ;; length of the delay MAY be indicated in a Retry-After
817 ;; header. If no Retry-After is given, the client SHOULD
818 ;; handle the response as it would for a 500 response.
820 (`gateway-timeout
; 504
821 ;; The server, while acting as a gateway or proxy, did not
822 ;; receive a timely response from the upstream server
823 ;; specified by the URI (e.g. HTTP, FTP, LDAP) or some other
824 ;; auxiliary server (e.g. DNS) it needed to access in
825 ;; attempting to complete the request.
827 (`http-version-not-supported
; 505
828 ;; The server does not support, or refuses to support, the
829 ;; HTTP protocol version that was used in the request
832 (`insufficient-storage
; 507 (DAV)
833 ;; The method could not be performed on the resource
834 ;; because the server is unable to store the representation
835 ;; needed to successfully complete the request. This
836 ;; condition is considered to be temporary. If the request
837 ;; which received this status code was the result of a user
838 ;; action, the request MUST NOT be repeated until it is
839 ;; requested by a separate user action.
841 ;; Tell the callback that an error occurred, and what the
844 (setf (car url-callback-arguments
)
845 (nconc (list :error
(list 'error
'http url-http-response-status
))
846 (car url-callback-arguments
)))))
848 (error "Unknown class of HTTP response code: %d (%d)"
849 class url-http-response-status
)))
851 (url-mark-buffer-as-dead buffer
)
852 (url-handle-content-transfer-encoding))
853 (url-http-debug "Finished parsing HTTP headers: %S" success
)
855 (goto-char (point-min))
858 (declare-function zlib-decompress-region
"decompress.c" (start end
))
860 (defun url-handle-content-transfer-encoding ()
861 (let ((encoding (mail-fetch-field "content-encoding")))
863 (fboundp 'zlib-available-p
)
865 (equal (downcase encoding
) "gzip"))
868 (goto-char (point-min))
869 (when (search-forward "\n\n")
870 (zlib-decompress-region (point) (point-max)))))))
873 (defun url-http-activate-callback ()
874 "Activate callback specified when this buffer was created."
875 (url-http-mark-connection-as-free (url-host url-current-object
)
876 (url-port url-current-object
)
878 (url-http-debug "Activating callback in buffer (%s)" (buffer-name))
879 (apply url-callback-function url-callback-arguments
))
883 ;; These unfortunately cannot be macros... please ignore them!
884 (defun url-http-idle-sentinel (proc why
)
885 "Remove (now defunct) process PROC from the list of open connections."
886 (maphash (lambda (key val
)
888 (puthash key
(delq proc val
) url-http-open-connections
)))
889 url-http-open-connections
))
891 (defun url-http-end-of-document-sentinel (proc why
)
892 ;; Sentinel used to handle (i) terminated old HTTP/0.9 connections,
893 ;; and (ii) closed connection due to reusing a HTTP connection which
894 ;; we believed was still alive, but which the server closed on us.
895 ;; We handle case (ii) by calling `url-http' again.
896 (url-http-debug "url-http-end-of-document-sentinel in buffer (%s)"
897 (process-buffer proc
))
898 (url-http-idle-sentinel proc why
)
899 (when (buffer-name (process-buffer proc
))
900 (with-current-buffer (process-buffer proc
)
901 (goto-char (point-min))
902 (cond ((not (looking-at "HTTP/"))
903 (if url-http-no-retry
904 ;; HTTP/0.9 just gets passed back no matter what
905 (url-http-activate-callback)
906 ;; Call `url-http' again if our connection expired.
908 (let ((url-request-method url-http-method
)
909 (url-request-extra-headers url-http-extra-headers
)
910 (url-request-data url-http-data
))
911 (url-http url-current-object url-callback-function
912 url-callback-arguments
(current-buffer)))))
913 ((url-http-parse-headers)
914 (url-http-activate-callback))))))
916 (defun url-http-simple-after-change-function (st nd length
)
917 ;; Function used when we do NOT know how long the document is going to be
918 ;; Just _very_ simple 'downloaded %d' type of info.
919 (url-lazy-message "Reading %s..." (file-size-human-readable nd
)))
921 (defun url-http-content-length-after-change-function (st nd length
)
922 "Function used when we DO know how long the document is going to be.
923 More sophisticated percentage downloaded, etc.
924 Also does minimal parsing of HTTP headers and will actually cause
925 the callback to be triggered."
926 (if url-http-content-type
927 (url-display-percentage
928 "Reading [%s]... %s of %s (%d%%)"
929 (url-percentage (- nd url-http-end-of-headers
)
930 url-http-content-length
)
931 url-http-content-type
932 (file-size-human-readable (- nd url-http-end-of-headers
))
933 (file-size-human-readable url-http-content-length
)
934 (url-percentage (- nd url-http-end-of-headers
)
935 url-http-content-length
))
936 (url-display-percentage
937 "Reading... %s of %s (%d%%)"
938 (url-percentage (- nd url-http-end-of-headers
)
939 url-http-content-length
)
940 (file-size-human-readable (- nd url-http-end-of-headers
))
941 (file-size-human-readable url-http-content-length
)
942 (url-percentage (- nd url-http-end-of-headers
)
943 url-http-content-length
)))
945 (if (> (- nd url-http-end-of-headers
) url-http-content-length
)
947 ;; Found the end of the document! Wheee!
948 (url-display-percentage nil nil
)
949 (url-lazy-message "Reading... done.")
950 (if (url-http-parse-headers)
951 (url-http-activate-callback)))))
953 (defun url-http-chunked-encoding-after-change-function (st nd length
)
954 "Function used when dealing with 'chunked' encoding.
955 Cannot give a sophisticated percentage, but we need a different
956 function to look for the special 0-length chunk that signifies
957 the end of the document."
960 (let ((read-next-chunk t
)
963 (no-initial-crlf nil
))
964 ;; We need to loop thru looking for more chunks even within
965 ;; one after-change-function call.
966 (while read-next-chunk
967 (setq no-initial-crlf
(= 0 url-http-chunked-counter
))
968 (if url-http-content-type
969 (url-display-percentage nil
970 "Reading [%s]... chunk #%d"
971 url-http-content-type url-http-chunked-counter
)
972 (url-display-percentage nil
973 "Reading... chunk #%d"
974 url-http-chunked-counter
))
975 (url-http-debug "Reading chunk %d (%d %d %d)"
976 url-http-chunked-counter st nd length
)
977 (setq regexp
(if no-initial-crlf
978 "\\([0-9a-z]+\\).*\r?\n"
979 "\r?\n\\([0-9a-z]+\\).*\r?\n"))
981 (if url-http-chunked-start
982 ;; We know how long the chunk is supposed to be, skip over
983 ;; leading crap if possible.
984 (if (> nd
(+ url-http-chunked-start url-http-chunked-length
))
986 (url-http-debug "Got to the end of chunk #%d!"
987 url-http-chunked-counter
)
988 (goto-char (+ url-http-chunked-start
989 url-http-chunked-length
)))
990 (url-http-debug "Still need %d bytes to hit end of chunk"
991 (- (+ url-http-chunked-start
992 url-http-chunked-length
)
994 (setq read-next-chunk nil
)))
995 (if (not read-next-chunk
)
996 (url-http-debug "Still spinning for next chunk...")
997 (if no-initial-crlf
(skip-chars-forward "\r\n"))
998 (if (not (looking-at regexp
))
1000 ;; Must not have received the entirety of the chunk header,
1001 ;; need to spin some more.
1002 (url-http-debug "Did not see start of chunk @ %d!" (point))
1003 (setq read-next-chunk nil
))
1004 (add-text-properties (match-beginning 0) (match-end 0)
1010 (setq url-http-chunked-length
(string-to-number (buffer-substring
1014 url-http-chunked-counter
(1+ url-http-chunked-counter
)
1015 url-http-chunked-start
(set-marker
1016 (or url-http-chunked-start
1019 ; (if (not url-http-debug)
1020 (delete-region (match-beginning 0) (match-end 0));)
1021 (url-http-debug "Saw start of chunk %d (length=%d, start=%d"
1022 url-http-chunked-counter url-http-chunked-length
1023 (marker-position url-http-chunked-start
))
1024 (if (= 0 url-http-chunked-length
)
1026 ;; Found the end of the document! Wheee!
1027 (url-http-debug "Saw end of stream chunk!")
1028 (setq read-next-chunk nil
)
1029 (url-display-percentage nil nil
)
1030 ;; Every chunk, even the last 0-length one, is
1031 ;; terminated by CRLF. Skip it.
1032 (when (looking-at "\r?\n")
1033 (url-http-debug "Removing terminator of last chunk")
1034 (delete-region (match-beginning 0) (match-end 0)))
1035 (if (re-search-forward "^\r*$" nil t
)
1036 (url-http-debug "Saw end of trailers..."))
1037 (if (url-http-parse-headers)
1038 (url-http-activate-callback))))))))))
1040 (defun url-http-wait-for-headers-change-function (st nd length
)
1041 ;; This will wait for the headers to arrive and then splice in the
1042 ;; next appropriate after-change-function, etc.
1043 (url-http-debug "url-http-wait-for-headers-change-function (%s)"
1045 (let ((end-of-headers nil
)
1047 (process-buffer (current-buffer))
1048 (content-length nil
))
1050 (goto-char (point-min))
1051 (if (and (looking-at ".*\n") ; have one line at least
1052 (not (looking-at "^HTTP/[1-9]\\.[0-9]")))
1053 ;; Not HTTP/x.y data, must be 0.9
1054 ;; God, I wish this could die.
1055 (setq end-of-headers t
1056 url-http-end-of-headers
0
1058 ;; Blank line at end of headers.
1059 (when (re-search-forward "^\r?\n" nil t
)
1061 ;; Saw the end of the headers
1062 (url-http-debug "Saw end of headers... (%s)" (buffer-name))
1063 (setq url-http-end-of-headers
(set-marker (make-marker)
1066 (setq nd
(- nd
(url-http-clean-headers)))))
1068 (if (not end-of-headers
)
1069 ;; Haven't seen the end of the headers yet, need to wait
1070 ;; for more data to arrive.
1073 (url-http-parse-response)
1074 (mail-narrow-to-head)
1075 (setq url-http-transfer-encoding
(mail-fetch-field
1076 "transfer-encoding")
1077 url-http-content-type
(mail-fetch-field "content-type"))
1078 (if (mail-fetch-field "content-length")
1079 (setq url-http-content-length
1080 (string-to-number (mail-fetch-field "content-length"))))
1082 (when url-http-transfer-encoding
1083 (setq url-http-transfer-encoding
1084 (downcase url-http-transfer-encoding
)))
1087 ((null url-http-response-status
)
1088 ;; We got back a headerless malformed response from the
1090 (url-http-activate-callback))
1091 ((or (= url-http-response-status
204)
1092 (= url-http-response-status
205))
1093 (url-http-debug "%d response must have headers only (%s)."
1094 url-http-response-status
(buffer-name))
1095 (when (url-http-parse-headers)
1096 (url-http-activate-callback)))
1097 ((string= "HEAD" url-http-method
)
1098 ;; A HEAD request is _ALWAYS_ terminated by the header
1099 ;; information, regardless of any entity headers,
1100 ;; according to section 4.4 of the HTTP/1.1 draft.
1101 (url-http-debug "HEAD request must have headers only (%s)."
1103 (when (url-http-parse-headers)
1104 (url-http-activate-callback)))
1105 ((string= "CONNECT" url-http-method
)
1106 ;; A CONNECT request is finished, but we cannot stick this
1107 ;; back on the free connection list
1108 (url-http-debug "CONNECT request must have headers only.")
1109 (when (url-http-parse-headers)
1110 (url-http-activate-callback)))
1111 ((equal url-http-response-status
304)
1112 ;; Only allowed to have a header section. We have to handle
1113 ;; this here instead of in url-http-parse-headers because if
1114 ;; you have a cached copy of something without a known
1115 ;; content-length, and try to retrieve it from the cache, we'd
1116 ;; fall into the 'being dumb' section and wait for the
1117 ;; connection to terminate, which means we'd wait for 10
1118 ;; seconds for the keep-alives to time out on some servers.
1119 (when (url-http-parse-headers)
1120 (url-http-activate-callback)))
1122 ;; HTTP/0.9 always signaled end-of-connection by closing the
1125 "Saw HTTP/0.9 response, connection closed means end of document.")
1126 (setq url-http-after-change-function
1127 'url-http-simple-after-change-function
))
1128 ((equal url-http-transfer-encoding
"chunked")
1129 (url-http-debug "Saw chunked encoding.")
1130 (setq url-http-after-change-function
1131 'url-http-chunked-encoding-after-change-function
)
1132 (when (> nd url-http-end-of-headers
)
1134 "Calling initial chunked-encoding for extra data at end of headers")
1135 (url-http-chunked-encoding-after-change-function
1136 (marker-position url-http-end-of-headers
) nd
1137 (- nd url-http-end-of-headers
))))
1138 ((integerp url-http-content-length
)
1140 "Got a content-length, being smart about document end.")
1141 (setq url-http-after-change-function
1142 'url-http-content-length-after-change-function
)
1144 ((= 0 url-http-content-length
)
1145 ;; We got a NULL body! Activate the callback
1148 "Got 0-length content-length, activating callback immediately.")
1149 (when (url-http-parse-headers)
1150 (url-http-activate-callback)))
1151 ((> nd url-http-end-of-headers
)
1152 ;; Have some leftover data
1153 (url-http-debug "Calling initial content-length for extra data at end of headers")
1154 (url-http-content-length-after-change-function
1155 (marker-position url-http-end-of-headers
)
1157 (- nd url-http-end-of-headers
)))
1161 (url-http-debug "No content-length, being dumb.")
1162 (setq url-http-after-change-function
1163 'url-http-simple-after-change-function
)))))
1164 ;; We are still at the beginning of the buffer... must just be
1165 ;; waiting for a response.
1166 (url-http-debug "Spinning waiting for headers...")
1167 (when (eq process-buffer
(current-buffer))
1168 (goto-char (point-max)))))
1170 (defun url-http (url callback cbargs
&optional retry-buffer
)
1171 "Retrieve URL via HTTP asynchronously.
1172 URL must be a parsed URL. See `url-generic-parse-url' for details.
1174 When retrieval is completed, execute the function CALLBACK, using
1175 the arguments listed in CBARGS. The first element in CBARGS
1176 should be a plist describing what has happened so far during the
1177 request, as described in the docstring of `url-retrieve' (if in
1178 doubt, specify nil).
1180 Optional arg RETRY-BUFFER, if non-nil, specifies the buffer of a
1181 previous `url-http' call, which is being re-attempted."
1182 (cl-check-type url vector
"Need a pre-parsed URL.")
1183 (let* ((host (url-host (or url-using-proxy url
)))
1184 (port (url-port (or url-using-proxy url
)))
1185 (connection (url-http-find-free-connection host port
))
1186 (buffer (or retry-buffer
1187 (generate-new-buffer
1188 (format " *http %s:%d*" host port
)))))
1189 (if (not connection
)
1190 ;; Failed to open the connection for some reason
1192 (kill-buffer buffer
)
1194 (error "Could not create connection to %s:%d" host port
))
1195 (with-current-buffer buffer
1196 (mm-disable-multibyte)
1197 (setq url-current-object url
1198 mode-line-format
"%b [%s]")
1200 (dolist (var '(url-http-end-of-headers
1201 url-http-content-type
1202 url-http-content-length
1203 url-http-transfer-encoding
1204 url-http-after-change-function
1205 url-http-response-version
1206 url-http-response-status
1207 url-http-chunked-length
1208 url-http-chunked-counter
1209 url-http-chunked-start
1210 url-callback-function
1211 url-callback-arguments
1215 url-http-extra-headers
1219 url-http-connection-opened
1221 (set (make-local-variable var
) nil
))
1223 (setq url-http-method
(or url-request-method
"GET")
1224 url-http-extra-headers url-request-extra-headers
1225 url-http-data url-request-data
1226 url-http-process connection
1227 url-http-chunked-length nil
1228 url-http-chunked-start nil
1229 url-http-chunked-counter
0
1230 url-callback-function callback
1231 url-callback-arguments cbargs
1232 url-http-after-change-function
'url-http-wait-for-headers-change-function
1233 url-http-target-url url-current-object
1234 url-http-no-retry retry-buffer
1235 url-http-connection-opened nil
1236 url-http-proxy url-using-proxy
)
1238 (set-process-buffer connection buffer
)
1239 (set-process-filter connection
'url-http-generic-filter
)
1240 (pcase (process-status connection
)
1242 ;; Asynchronous connection
1243 (set-process-sentinel connection
'url-http-async-sentinel
))
1245 ;; Asynchronous connection failed
1246 (error "Could not create connection to %s:%d" host port
))
1248 (set-process-sentinel connection
1249 'url-http-end-of-document-sentinel
)
1250 (process-send-string connection
(url-http-create-request))))))
1253 (defun url-http-async-sentinel (proc why
)
1254 ;; We are performing an asynchronous connection, and a status change
1256 (when (buffer-name (process-buffer proc
))
1257 (with-current-buffer (process-buffer proc
)
1259 (url-http-connection-opened
1260 (setq url-http-no-retry t
)
1261 (url-http-end-of-document-sentinel proc why
))
1262 ((string= (substring why
0 4) "open")
1263 (setq url-http-connection-opened t
)
1264 (condition-case error
1265 (process-send-string proc
(url-http-create-request))
1267 (setq url-http-connection-opened nil
)
1268 (message "HTTP error: %s" error
))))
1270 (setf (car url-callback-arguments
)
1271 (nconc (list :error
(list 'error
'connection-failed why
1272 :host
(url-host (or url-http-proxy url-current-object
))
1273 :service
(url-port (or url-http-proxy url-current-object
))))
1274 (car url-callback-arguments
)))
1275 (url-http-activate-callback))))))
1277 ;; Since Emacs 19/20 does not allow you to change the
1278 ;; `after-change-functions' hook in the midst of running them, we fake
1279 ;; an after change by hooking into the process filter and inserting
1280 ;; the data ourselves. This is slightly less efficient, but there
1281 ;; were tons of weird ways the after-change code was biting us in the
1283 ;; FIXME this can probably be simplified since the above is no longer true.
1284 (defun url-http-generic-filter (proc data
)
1285 ;; Sometimes we get a zero-length data chunk after the process has
1286 ;; been changed to 'free', which means it has no buffer associated
1287 ;; with it. Do nothing if there is no buffer, or 0 length data.
1288 (and (process-buffer proc
)
1289 (/= (length data
) 0)
1290 (with-current-buffer (process-buffer proc
)
1291 (url-http-debug "Calling after change function `%s' for `%S'" url-http-after-change-function proc
)
1292 (funcall url-http-after-change-function
1295 (goto-char (point-max))
1300 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
1301 ;;; file-name-handler stuff from here on out
1302 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
1303 (defalias 'url-http-symbol-value-in-buffer
1304 (if (fboundp 'symbol-value-in-buffer
)
1305 'symbol-value-in-buffer
1306 (lambda (symbol buffer
&optional unbound-value
)
1307 "Return the value of SYMBOL in BUFFER, or UNBOUND-VALUE if it is unbound."
1308 (with-current-buffer buffer
1309 (if (not (boundp symbol
))
1311 (symbol-value symbol
))))))
1313 (defun url-http-head (url)
1314 (let ((url-request-method "HEAD")
1315 (url-request-data nil
))
1316 (url-retrieve-synchronously url
)))
1318 (defun url-http-file-exists-p (url)
1319 (let ((buffer (url-http-head url
)))
1321 (let ((status (url-http-symbol-value-in-buffer 'url-http-response-status
1324 (and (integerp status
)
1325 (>= status
200) (< status
300))
1326 (kill-buffer buffer
))))))
1328 (defalias 'url-http-file-readable-p
'url-http-file-exists-p
)
1330 (defun url-http-head-file-attributes (url &optional id-format
)
1331 (let ((buffer (url-http-head url
)))
1335 nil
;dir / link / normal file
1336 1 ;number of links to file.
1338 nil nil nil
;atime ; mtime ; ctime
1339 (url-http-symbol-value-in-buffer 'url-http-content-length
1341 (eval-when-compile (make-string 10 ?-
))
1342 nil nil nil
) ;whether gid would change ; inode ; device.
1343 (kill-buffer buffer
)))))
1345 (declare-function url-dav-file-attributes
"url-dav" (url &optional id-format
))
1347 (defun url-http-file-attributes (url &optional id-format
)
1348 (if (url-dav-supported-p url
)
1349 (url-dav-file-attributes url id-format
)
1350 (url-http-head-file-attributes url id-format
)))
1352 (defun url-http-options (url)
1353 "Return a property list describing options available for URL.
1354 This list is retrieved using the `OPTIONS' HTTP method.
1356 Property list members:
1359 A list of symbols specifying what HTTP methods the resource
1363 A list of numbers specifying what DAV protocol/schema versions are
1367 A list of supported DASL search types supported (string form)
1370 A list of the units available for use in partial document fetches.
1373 The `Platform For Privacy Protection' description for the resource.
1374 Currently this is just the raw header contents. This is likely to
1375 change once P3P is formally supported by the URL package or
1377 (let* ((url-request-method "OPTIONS")
1378 (url-request-data nil
)
1379 (buffer (url-retrieve-synchronously url
))
1382 (when (and buffer
(= 2 (/ (url-http-symbol-value-in-buffer
1383 'url-http-response-status buffer
0) 100)))
1384 ;; Only parse the options if we got a 2xx response code!
1385 (with-current-buffer buffer
1388 (mail-narrow-to-head)
1390 ;; Figure out what methods are supported.
1391 (when (setq header
(mail-fetch-field "allow"))
1392 (setq options
(plist-put
1394 (mapcar 'intern
(split-string header
"[ ,]+")))))
1397 (when (setq header
(mail-fetch-field "dav"))
1398 (setq options
(plist-put
1401 (mapcar 'string-to-number
1402 (split-string header
"[, ]+"))))))
1405 (when (setq header
(mail-fetch-field "dasl"))
1406 (setq options
(plist-put
1408 (split-string header
"[, ]+"))))
1410 ;; P3P - should get more detailed here. FIXME
1411 (when (setq header
(mail-fetch-field "p3p"))
1412 (setq options
(plist-put options
'p3p header
)))
1414 ;; Check for whether they accept byte-range requests.
1415 (when (setq header
(mail-fetch-field "accept-ranges"))
1416 (setq options
(plist-put
1420 (split-string header
"[, ]+"))))))
1422 (if buffer
(kill-buffer buffer
))
1425 ;; HTTPS. This used to be in url-https.el, but that file collides
1426 ;; with url-http.el on systems with 8-character file names.
1429 (defconst url-https-default-port
443 "Default HTTPS port.")
1430 (defconst url-https-asynchronous-p t
"HTTPS retrievals are asynchronous.")
1432 ;; FIXME what is the point of this alias being an autoload?
1433 ;; Trying to use it will not cause url-http to be loaded,
1434 ;; since the full alias just gets dumped into loaddefs.el.
1436 ;;;###autoload (autoload 'url-default-expander "url-expand")
1438 (defalias 'url-https-expand-file-name
'url-default-expander
)
1440 (defmacro url-https-create-secure-wrapper
(method args
)
1441 `(defun ,(intern (format (if method
"url-https-%s" "url-https") method
)) ,args
1442 ,(format "HTTPS wrapper around `%s' call." (or method
"url-http"))
1443 (let ((url-gateway-method 'tls
))
1444 (,(intern (format (if method
"url-http-%s" "url-http") method
))
1445 ,@(remove '&rest
(remove '&optional args
))))))
1447 ;;;###autoload (autoload 'url-https "url-http")
1448 (url-https-create-secure-wrapper nil
(url callback cbargs
))
1449 ;;;###autoload (autoload 'url-https-file-exists-p "url-http")
1450 (url-https-create-secure-wrapper file-exists-p
(url))
1451 ;;;###autoload (autoload 'url-https-file-readable-p "url-http")
1452 (url-https-create-secure-wrapper file-readable-p
(url))
1453 ;;;###autoload (autoload 'url-https-file-attributes "url-http")
1454 (url-https-create-secure-wrapper file-attributes
(url &optional id-format
))
1458 ;;; url-http.el ends here
HCoop / bpt / emacs.git / blob