2 Copyright (C) 1996-2005 Free Software Foundation, Inc.
4 This file is part of GNU Wget.
6 GNU Wget is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 GNU Wget is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with Wget; if not, write to the Free Software Foundation, Inc.,
18 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 In addition, as a special exception, the Free Software Foundation
21 gives permission to link the code of its release of Wget with the
22 OpenSSL project's "OpenSSL" library (or with modified versions of it
23 that use the same license as the "OpenSSL" library), and distribute
24 the linked executables. You must obey the GNU General Public License
25 in all respects for all of the code used other than "OpenSSL". If you
26 modify this file, you may extend this exception to your version of the
27 file, but you are not obligated to do so. If you do not wish to do
28 so, delete this exception statement from your version. */
55 # include "http-ntlm.h"
63 extern char *version_string;
66 # define MIN(x, y) ((x) > (y) ? (y) : (x))
70 static bool cookies_loaded_p;
71 static struct cookie_jar *wget_cookie_jar;
73 #define TEXTHTML_S "text/html"
74 #define TEXTXHTML_S "application/xhtml+xml"
76 /* Some status code validation macros: */
77 #define H_20X(x) (((x) >= 200) && ((x) < 300))
78 #define H_PARTIAL(x) ((x) == HTTP_STATUS_PARTIAL_CONTENTS)
79 #define H_REDIRECTED(x) ((x) == HTTP_STATUS_MOVED_PERMANENTLY \
80 || (x) == HTTP_STATUS_MOVED_TEMPORARILY \
81 || (x) == HTTP_STATUS_SEE_OTHER \
82 || (x) == HTTP_STATUS_TEMPORARY_REDIRECT)
84 /* HTTP/1.0 status codes from RFC1945, provided for reference. */
86 #define HTTP_STATUS_OK 200
87 #define HTTP_STATUS_CREATED 201
88 #define HTTP_STATUS_ACCEPTED 202
89 #define HTTP_STATUS_NO_CONTENT 204
90 #define HTTP_STATUS_PARTIAL_CONTENTS 206
92 /* Redirection 3xx. */
93 #define HTTP_STATUS_MULTIPLE_CHOICES 300
94 #define HTTP_STATUS_MOVED_PERMANENTLY 301
95 #define HTTP_STATUS_MOVED_TEMPORARILY 302
96 #define HTTP_STATUS_SEE_OTHER 303 /* from HTTP/1.1 */
97 #define HTTP_STATUS_NOT_MODIFIED 304
98 #define HTTP_STATUS_TEMPORARY_REDIRECT 307 /* from HTTP/1.1 */
100 /* Client error 4xx. */
101 #define HTTP_STATUS_BAD_REQUEST 400
102 #define HTTP_STATUS_UNAUTHORIZED 401
103 #define HTTP_STATUS_FORBIDDEN 403
104 #define HTTP_STATUS_NOT_FOUND 404
105 #define HTTP_STATUS_RANGE_NOT_SATISFIABLE 416
107 /* Server errors 5xx. */
108 #define HTTP_STATUS_INTERNAL 500
109 #define HTTP_STATUS_NOT_IMPLEMENTED 501
110 #define HTTP_STATUS_BAD_GATEWAY 502
111 #define HTTP_STATUS_UNAVAILABLE 503
114 rel_none, rel_name, rel_value, rel_both
121 struct request_header {
123 enum rp release_policy;
125 int hcount, hcapacity;
128 /* Create a new, empty request. At least request_set_method must be
129 called before the request can be used. */
131 static struct request *
134 struct request *req = xnew0 (struct request);
136 req->headers = xnew_array (struct request_header, req->hcapacity);
140 /* Set the request's method and its arguments. METH should be a
141 literal string (or it should outlive the request) because it will
142 not be freed. ARG will be freed by request_free. */
145 request_set_method (struct request *req, const char *meth, char *arg)
151 /* Return the method string passed with the last call to
152 request_set_method. */
155 request_method (const struct request *req)
160 /* Free one header according to the release policy specified with
161 request_set_header. */
164 release_header (struct request_header *hdr)
166 switch (hdr->release_policy)
183 /* Set the request named NAME to VALUE. Specifically, this means that
184 a "NAME: VALUE\r\n" header line will be used in the request. If a
185 header with the same name previously existed in the request, its
186 value will be replaced by this one. A NULL value means do nothing.
188 RELEASE_POLICY determines whether NAME and VALUE should be released
189 (freed) with request_free. Allowed values are:
191 - rel_none - don't free NAME or VALUE
192 - rel_name - free NAME when done
193 - rel_value - free VALUE when done
194 - rel_both - free both NAME and VALUE when done
196 Setting release policy is useful when arguments come from different
197 sources. For example:
199 // Don't free literal strings!
200 request_set_header (req, "Pragma", "no-cache", rel_none);
202 // Don't free a global variable, we'll need it later.
203 request_set_header (req, "Referer", opt.referer, rel_none);
205 // Value freshly allocated, free it when done.
206 request_set_header (req, "Range",
207 aprintf ("bytes=%s-", number_to_static_string (hs->restval)),
212 request_set_header (struct request *req, char *name, char *value,
213 enum rp release_policy)
215 struct request_header *hdr;
220 /* A NULL value is a no-op; if freeing the name is requested,
221 free it now to avoid leaks. */
222 if (release_policy == rel_name || release_policy == rel_both)
227 for (i = 0; i < req->hcount; i++)
229 hdr = &req->headers[i];
230 if (0 == strcasecmp (name, hdr->name))
232 /* Replace existing header. */
233 release_header (hdr);
236 hdr->release_policy = release_policy;
241 /* Install new header. */
243 if (req->hcount >= req->hcapacity)
245 req->hcapacity <<= 1;
246 req->headers = xrealloc (req->headers, req->hcapacity * sizeof (*hdr));
248 hdr = &req->headers[req->hcount++];
251 hdr->release_policy = release_policy;
254 /* Like request_set_header, but sets the whole header line, as
255 provided by the user using the `--header' option. For example,
256 request_set_user_header (req, "Foo: bar") works just like
257 request_set_header (req, "Foo", "bar"). */
260 request_set_user_header (struct request *req, const char *header)
263 const char *p = strchr (header, ':');
266 BOUNDED_TO_ALLOCA (header, p, name);
270 request_set_header (req, xstrdup (name), (char *) p, rel_name);
273 /* Remove the header with specified name from REQ. Returns true if
274 the header was actually removed, false otherwise. */
277 request_remove_header (struct request *req, char *name)
280 for (i = 0; i < req->hcount; i++)
282 struct request_header *hdr = &req->headers[i];
283 if (0 == strcasecmp (name, hdr->name))
285 release_header (hdr);
286 /* Move the remaining headers by one. */
287 if (i < req->hcount - 1)
288 memmove (hdr, hdr + 1, (req->hcount - i - 1) * sizeof (*hdr));
296 #define APPEND(p, str) do { \
297 int A_len = strlen (str); \
298 memcpy (p, str, A_len); \
302 /* Construct the request and write it to FD using fd_write. */
305 request_send (const struct request *req, int fd)
307 char *request_string, *p;
308 int i, size, write_error;
310 /* Count the request size. */
313 /* METHOD " " ARG " " "HTTP/1.0" "\r\n" */
314 size += strlen (req->method) + 1 + strlen (req->arg) + 1 + 8 + 2;
316 for (i = 0; i < req->hcount; i++)
318 struct request_header *hdr = &req->headers[i];
319 /* NAME ": " VALUE "\r\n" */
320 size += strlen (hdr->name) + 2 + strlen (hdr->value) + 2;
326 p = request_string = alloca_array (char, size);
328 /* Generate the request. */
330 APPEND (p, req->method); *p++ = ' ';
331 APPEND (p, req->arg); *p++ = ' ';
332 memcpy (p, "HTTP/1.0\r\n", 10); p += 10;
334 for (i = 0; i < req->hcount; i++)
336 struct request_header *hdr = &req->headers[i];
337 APPEND (p, hdr->name);
338 *p++ = ':', *p++ = ' ';
339 APPEND (p, hdr->value);
340 *p++ = '\r', *p++ = '\n';
343 *p++ = '\r', *p++ = '\n', *p++ = '\0';
344 assert (p - request_string == size);
348 DEBUGP (("\n---request begin---\n%s---request end---\n", request_string));
350 /* Send the request to the server. */
352 write_error = fd_write (fd, request_string, size - 1, -1);
354 logprintf (LOG_VERBOSE, _("Failed writing HTTP request: %s.\n"),
359 /* Release the resources used by REQ. */
362 request_free (struct request *req)
365 xfree_null (req->arg);
366 for (i = 0; i < req->hcount; i++)
367 release_header (&req->headers[i]);
368 xfree_null (req->headers);
372 /* Send the contents of FILE_NAME to SOCK. Make sure that exactly
373 PROMISED_SIZE bytes are sent over the wire -- if the file is
374 longer, read only that much; if the file is shorter, report an error. */
377 post_file (int sock, const char *file_name, wgint promised_size)
379 static char chunk[8192];
384 DEBUGP (("[writing POST file %s ... ", file_name));
386 fp = fopen (file_name, "rb");
389 while (!feof (fp) && written < promised_size)
392 int length = fread (chunk, 1, sizeof (chunk), fp);
395 towrite = MIN (promised_size - written, length);
396 write_error = fd_write (sock, chunk, towrite, -1);
406 /* If we've written less than was promised, report a (probably
407 nonsensical) error rather than break the promise. */
408 if (written < promised_size)
414 assert (written == promised_size);
415 DEBUGP (("done]\n"));
419 /* Determine whether [START, PEEKED + PEEKLEN) contains an empty line.
420 If so, return the pointer to the position after the line, otherwise
421 return NULL. This is used as callback to fd_read_hunk. The data
422 between START and PEEKED has been read and cannot be "unread"; the
423 data after PEEKED has only been peeked. */
426 response_head_terminator (const char *start, const char *peeked, int peeklen)
430 /* If at first peek, verify whether HUNK starts with "HTTP". If
431 not, this is a HTTP/0.9 request and we must bail out without
433 if (start == peeked && 0 != memcmp (start, "HTTP", MIN (peeklen, 4)))
436 /* Look for "\n[\r]\n", and return the following position if found.
437 Start two chars before the current to cover the possibility that
438 part of the terminator (e.g. "\n\r") arrived in the previous
440 p = peeked - start < 2 ? start : peeked - 2;
441 end = peeked + peeklen;
443 /* Check for \n\r\n or \n\n anywhere in [p, end-2). */
444 for (; p < end - 2; p++)
447 if (p[1] == '\r' && p[2] == '\n')
449 else if (p[1] == '\n')
452 /* p==end-2: check for \n\n directly preceding END. */
453 if (p[0] == '\n' && p[1] == '\n')
459 /* The maximum size of a single HTTP response we care to read. Rather
460 than being a limit of the reader implementation, this limit
461 prevents Wget from slurping all available memory upon encountering
462 malicious or buggy server output, thus protecting the user. Define
463 it to 0 to remove the limit. */
465 #define HTTP_RESPONSE_MAX_SIZE 65536
467 /* Read the HTTP request head from FD and return it. The error
468 conditions are the same as with fd_read_hunk.
470 To support HTTP/0.9 responses, this function tries to make sure
471 that the data begins with "HTTP". If this is not the case, no data
472 is read and an empty request is returned, so that the remaining
473 data can be treated as body. */
476 read_http_response_head (int fd)
478 return fd_read_hunk (fd, response_head_terminator, 512,
479 HTTP_RESPONSE_MAX_SIZE);
483 /* The response data. */
486 /* The array of pointers that indicate where each header starts.
487 For example, given this HTTP response:
494 The headers are located like this:
496 "HTTP/1.0 200 Ok\r\nDescription: some\r\n text\r\nEtag: x\r\n\r\n"
498 headers[0] headers[1] headers[2] headers[3]
500 I.e. headers[0] points to the beginning of the request,
501 headers[1] points to the end of the first header and the
502 beginning of the second one, etc. */
504 const char **headers;
507 /* Create a new response object from the text of the HTTP response,
508 available in HEAD. That text is automatically split into
509 constituent header lines for fast retrieval using
512 static struct response *
513 resp_new (const char *head)
518 struct response *resp = xnew0 (struct response);
523 /* Empty head means that we're dealing with a headerless
524 (HTTP/0.9) response. In that case, don't set HEADERS at
529 /* Split HEAD into header lines, so that resp_header_* functions
530 don't need to do this over and over again. */
536 DO_REALLOC (resp->headers, size, count + 1, const char *);
537 resp->headers[count++] = hdr;
539 /* Break upon encountering an empty line. */
540 if (!hdr[0] || (hdr[0] == '\r' && hdr[1] == '\n') || hdr[0] == '\n')
543 /* Find the end of HDR, including continuations. */
546 const char *end = strchr (hdr, '\n');
552 while (*hdr == ' ' || *hdr == '\t');
554 DO_REALLOC (resp->headers, size, count + 1, const char *);
555 resp->headers[count] = NULL;
560 /* Locate the header named NAME in the request data, starting with
561 position START. This allows the code to loop through the request
562 data, filtering for all requests of a given name. Returns the
563 found position, or -1 for failure. The code that uses this
564 function typically looks like this:
566 for (pos = 0; (pos = resp_header_locate (...)) != -1; pos++)
567 ... do something with header ...
569 If you only care about one header, use resp_header_get instead of
573 resp_header_locate (const struct response *resp, const char *name, int start,
574 const char **begptr, const char **endptr)
577 const char **headers = resp->headers;
580 if (!headers || !headers[1])
583 name_len = strlen (name);
589 for (; headers[i + 1]; i++)
591 const char *b = headers[i];
592 const char *e = headers[i + 1];
594 && b[name_len] == ':'
595 && 0 == strncasecmp (b, name, name_len))
598 while (b < e && ISSPACE (*b))
600 while (b < e && ISSPACE (e[-1]))
610 /* Find and retrieve the header named NAME in the request data. If
611 found, set *BEGPTR to its starting, and *ENDPTR to its ending
612 position, and return true. Otherwise return false.
614 This function is used as a building block for resp_header_copy
615 and resp_header_strdup. */
618 resp_header_get (const struct response *resp, const char *name,
619 const char **begptr, const char **endptr)
621 int pos = resp_header_locate (resp, name, 0, begptr, endptr);
625 /* Copy the response header named NAME to buffer BUF, no longer than
626 BUFSIZE (BUFSIZE includes the terminating 0). If the header
627 exists, true is returned, false otherwise. If there should be no
628 limit on the size of the header, use resp_header_strdup instead.
630 If BUFSIZE is 0, no data is copied, but the boolean indication of
631 whether the header is present is still returned. */
634 resp_header_copy (const struct response *resp, const char *name,
635 char *buf, int bufsize)
638 if (!resp_header_get (resp, name, &b, &e))
642 int len = MIN (e - b, bufsize - 1);
643 memcpy (buf, b, len);
649 /* Return the value of header named NAME in RESP, allocated with
650 malloc. If such a header does not exist in RESP, return NULL. */
653 resp_header_strdup (const struct response *resp, const char *name)
656 if (!resp_header_get (resp, name, &b, &e))
658 return strdupdelim (b, e);
661 /* Parse the HTTP status line, which is of format:
663 HTTP-Version SP Status-Code SP Reason-Phrase
665 The function returns the status-code, or -1 if the status line
666 appears malformed. The pointer to "reason-phrase" message is
667 returned in *MESSAGE. */
670 resp_status (const struct response *resp, char **message)
677 /* For a HTTP/0.9 response, assume status 200. */
679 *message = xstrdup (_("No headers, assuming HTTP/0.9"));
683 p = resp->headers[0];
684 end = resp->headers[1];
690 if (end - p < 4 || 0 != strncmp (p, "HTTP", 4))
694 /* Match the HTTP version. This is optional because Gnutella
695 servers have been reported to not specify HTTP version. */
696 if (p < end && *p == '/')
699 while (p < end && ISDIGIT (*p))
701 if (p < end && *p == '.')
703 while (p < end && ISDIGIT (*p))
707 while (p < end && ISSPACE (*p))
709 if (end - p < 3 || !ISDIGIT (p[0]) || !ISDIGIT (p[1]) || !ISDIGIT (p[2]))
712 status = 100 * (p[0] - '0') + 10 * (p[1] - '0') + (p[2] - '0');
717 while (p < end && ISSPACE (*p))
719 while (p < end && ISSPACE (end[-1]))
721 *message = strdupdelim (p, end);
727 /* Release the resources used by RESP. */
730 resp_free (struct response *resp)
732 xfree_null (resp->headers);
736 /* Print the server response, line by line, omitting the trailing CRLF
737 from individual header lines, and prefixed with PREFIX. */
740 print_server_response (const struct response *resp, const char *prefix)
745 for (i = 0; resp->headers[i + 1]; i++)
747 const char *b = resp->headers[i];
748 const char *e = resp->headers[i + 1];
750 if (b < e && e[-1] == '\n')
752 if (b < e && e[-1] == '\r')
754 /* This is safe even on printfs with broken handling of "%.<n>s"
755 because resp->headers ends with \0. */
756 logprintf (LOG_VERBOSE, "%s%.*s\n", prefix, e - b, b);
760 /* Parse the `Content-Range' header and extract the information it
761 contains. Returns true if successful, false otherwise. */
763 parse_content_range (const char *hdr, wgint *first_byte_ptr,
764 wgint *last_byte_ptr, wgint *entity_length_ptr)
768 /* Ancient versions of Netscape proxy server, presumably predating
769 rfc2068, sent out `Content-Range' without the "bytes"
771 if (0 == strncasecmp (hdr, "bytes", 5))
774 /* "JavaWebServer/1.1.1" sends "bytes: x-y/z", contrary to the
778 while (ISSPACE (*hdr))
785 for (num = 0; ISDIGIT (*hdr); hdr++)
786 num = 10 * num + (*hdr - '0');
787 if (*hdr != '-' || !ISDIGIT (*(hdr + 1)))
789 *first_byte_ptr = num;
791 for (num = 0; ISDIGIT (*hdr); hdr++)
792 num = 10 * num + (*hdr - '0');
793 if (*hdr != '/' || !ISDIGIT (*(hdr + 1)))
795 *last_byte_ptr = num;
797 for (num = 0; ISDIGIT (*hdr); hdr++)
798 num = 10 * num + (*hdr - '0');
799 *entity_length_ptr = num;
803 /* Read the body of the request, but don't store it anywhere and don't
804 display a progress gauge. This is useful for reading the bodies of
805 administrative responses to which we will soon issue another
806 request. The response is not useful to the user, but reading it
807 allows us to continue using the same connection to the server.
809 If reading fails, false is returned, true otherwise. In debug
810 mode, the body is displayed for debugging purposes. */
813 skip_short_body (int fd, wgint contlen)
816 SKIP_SIZE = 512, /* size of the download buffer */
817 SKIP_THRESHOLD = 4096 /* the largest size we read */
819 char dlbuf[SKIP_SIZE + 1];
820 dlbuf[SKIP_SIZE] = '\0'; /* so DEBUGP can safely print it */
822 /* We shouldn't get here with unknown contlen. (This will change
823 with HTTP/1.1, which supports "chunked" transfer.) */
824 assert (contlen != -1);
826 /* If the body is too large, it makes more sense to simply close the
827 connection than to try to read the body. */
828 if (contlen > SKIP_THRESHOLD)
831 DEBUGP (("Skipping %s bytes of body: [", number_to_static_string (contlen)));
835 int ret = fd_read (fd, dlbuf, MIN (contlen, SKIP_SIZE), -1);
838 /* Don't normally report the error since this is an
839 optimization that should be invisible to the user. */
840 DEBUGP (("] aborting (%s).\n",
841 ret < 0 ? fd_errstr (fd) : "EOF received"));
845 /* Safe even if %.*s bogusly expects terminating \0 because
846 we've zero-terminated dlbuf above. */
847 DEBUGP (("%.*s", ret, dlbuf));
850 DEBUGP (("] done.\n"));
854 /* Persistent connections. Currently, we cache the most recently used
855 connection as persistent, provided that the HTTP server agrees to
856 make it such. The persistence data is stored in the variables
857 below. Ideally, it should be possible to cache an arbitrary fixed
858 number of these connections. */
860 /* Whether a persistent connection is active. */
861 static bool pconn_active;
864 /* The socket of the connection. */
867 /* Host and port of the currently active persistent connection. */
871 /* Whether a ssl handshake has occoured on this connection. */
874 /* Whether the connection was authorized. This is only done by
875 NTLM, which authorizes *connections* rather than individual
876 requests. (That practice is peculiar for HTTP, but it is a
877 useful optimization.) */
881 /* NTLM data of the current connection. */
882 struct ntlmdata ntlm;
886 /* Mark the persistent connection as invalid and free the resources it
887 uses. This is used by the CLOSE_* macros after they forcefully
888 close a registered persistent connection. */
891 invalidate_persistent (void)
893 DEBUGP (("Disabling further reuse of socket %d.\n", pconn.socket));
894 pconn_active = false;
895 fd_close (pconn.socket);
900 /* Register FD, which should be a TCP/IP connection to HOST:PORT, as
901 persistent. This will enable someone to use the same connection
902 later. In the context of HTTP, this must be called only AFTER the
903 response has been received and the server has promised that the
904 connection will remain alive.
906 If a previous connection was persistent, it is closed. */
909 register_persistent (const char *host, int port, int fd, bool ssl)
913 if (pconn.socket == fd)
915 /* The connection FD is already registered. */
920 /* The old persistent connection is still active; close it
921 first. This situation arises whenever a persistent
922 connection exists, but we then connect to a different
923 host, and try to register a persistent connection to that
925 invalidate_persistent ();
931 pconn.host = xstrdup (host);
934 pconn.authorized = false;
936 DEBUGP (("Registered socket %d for persistent reuse.\n", fd));
939 /* Return true if a persistent connection is available for connecting
943 persistent_available_p (const char *host, int port, bool ssl,
944 bool *host_lookup_failed)
946 /* First, check whether a persistent connection is active at all. */
950 /* If we want SSL and the last connection wasn't or vice versa,
951 don't use it. Checking for host and port is not enough because
952 HTTP and HTTPS can apparently coexist on the same port. */
953 if (ssl != pconn.ssl)
956 /* If we're not connecting to the same port, we're not interested. */
957 if (port != pconn.port)
960 /* If the host is the same, we're in business. If not, there is
961 still hope -- read below. */
962 if (0 != strcasecmp (host, pconn.host))
964 /* Check if pconn.socket is talking to HOST under another name.
965 This happens often when both sites are virtual hosts
966 distinguished only by name and served by the same network
967 interface, and hence the same web server (possibly set up by
968 the ISP and serving many different web sites). This
969 admittedly unconventional optimization does not contradict
970 HTTP and works well with popular server software. */
974 struct address_list *al;
977 /* Don't try to talk to two different SSL sites over the same
978 secure connection! (Besides, it's not clear that
979 name-based virtual hosting is even possible with SSL.) */
982 /* If pconn.socket's peer is one of the IP addresses HOST
983 resolves to, pconn.socket is for all intents and purposes
984 already talking to HOST. */
986 if (!socket_ip_address (pconn.socket, &ip, ENDPOINT_PEER))
988 /* Can't get the peer's address -- something must be very
989 wrong with the connection. */
990 invalidate_persistent ();
993 al = lookup_host (host, 0);
996 *host_lookup_failed = true;
1000 found = address_list_contains (al, &ip);
1001 address_list_release (al);
1006 /* The persistent connection's peer address was found among the
1007 addresses HOST resolved to; therefore, pconn.sock is in fact
1008 already talking to HOST -- no need to reconnect. */
1011 /* Finally, check whether the connection is still open. This is
1012 important because most servers implement liberal (short) timeout
1013 on persistent connections. Wget can of course always reconnect
1014 if the connection doesn't work out, but it's nicer to know in
1015 advance. This test is a logical followup of the first test, but
1016 is "expensive" and therefore placed at the end of the list.
1018 (Current implementation of test_socket_open has a nice side
1019 effect that it treats sockets with pending data as "closed".
1020 This is exactly what we want: if a broken server sends message
1021 body in response to HEAD, or if it sends more than conent-length
1022 data, we won't reuse the corrupted connection.) */
1024 if (!test_socket_open (pconn.socket))
1026 /* Oops, the socket is no longer open. Now that we know that,
1027 let's invalidate the persistent connection before returning
1029 invalidate_persistent ();
1036 /* The idea behind these two CLOSE macros is to distinguish between
1037 two cases: one when the job we've been doing is finished, and we
1038 want to close the connection and leave, and two when something is
1039 seriously wrong and we're closing the connection as part of
1042 In case of keep_alive, CLOSE_FINISH should leave the connection
1043 open, while CLOSE_INVALIDATE should still close it.
1045 Note that the semantics of the flag `keep_alive' is "this
1046 connection *will* be reused (the server has promised not to close
1047 the connection once we're done)", while the semantics of
1048 `pc_active_p && (fd) == pc_last_fd' is "we're *now* using an
1049 active, registered connection". */
1051 #define CLOSE_FINISH(fd) do { \
1054 if (pconn_active && (fd) == pconn.socket) \
1055 invalidate_persistent (); \
1064 #define CLOSE_INVALIDATE(fd) do { \
1065 if (pconn_active && (fd) == pconn.socket) \
1066 invalidate_persistent (); \
1074 wgint len; /* received length */
1075 wgint contlen; /* expected length */
1076 wgint restval; /* the restart value */
1077 int res; /* the result of last read */
1078 char *rderrmsg; /* error message from read error */
1079 char *newloc; /* new location (redirection) */
1080 char *remote_time; /* remote time-stamp string */
1081 char *error; /* textual HTTP error */
1082 int statcode; /* status code */
1083 wgint rd_size; /* amount of data read from socket */
1084 double dltime; /* time it took to download the data */
1085 const char *referer; /* value of the referer header. */
1086 char *local_file; /* local file name. */
1087 bool timestamp_checked; /* true if pre-download time-stamping checks
1088 * have already been performed */
1089 char *orig_file_name; /* name of file to compare for time-stamping
1090 * (might be != local_file if -K is set) */
1091 wgint orig_file_size; /* size of file to compare for time-stamping */
1092 time_t orig_file_tstamp; /* time-stamp of file to compare for
1097 free_hstat (struct http_stat *hs)
1099 xfree_null (hs->newloc);
1100 xfree_null (hs->remote_time);
1101 xfree_null (hs->error);
1102 xfree_null (hs->rderrmsg);
1103 xfree_null (hs->local_file);
1104 xfree_null (hs->orig_file_name);
1106 /* Guard against being called twice. */
1108 hs->remote_time = NULL;
1112 static char *create_authorization_line (const char *, const char *,
1113 const char *, const char *,
1114 const char *, bool *);
1115 static char *basic_authentication_encode (const char *, const char *);
1116 static bool known_authentication_scheme_p (const char *, const char *);
1117 static void load_cookies (void);
1119 #define BEGINS_WITH(line, string_constant) \
1120 (!strncasecmp (line, string_constant, sizeof (string_constant) - 1) \
1121 && (ISSPACE (line[sizeof (string_constant) - 1]) \
1122 || !line[sizeof (string_constant) - 1]))
1124 #define SET_USER_AGENT(req) do { \
1125 if (!opt.useragent) \
1126 request_set_header (req, "User-Agent", \
1127 aprintf ("Wget/%s", version_string), rel_value); \
1128 else if (*opt.useragent) \
1129 request_set_header (req, "User-Agent", opt.useragent, rel_none); \
1132 /* The flags that allow clobbering the file (opening with "wb").
1133 Defined here to avoid repetition later. #### This will require
1135 #define ALLOW_CLOBBER (opt.noclobber || opt.always_rest || opt.timestamping \
1136 || opt.dirstruct || opt.output_document)
1138 /* Retrieve a document through HTTP protocol. It recognizes status
1139 code, and correctly handles redirections. It closes the network
1140 socket. If it receives an error from the functions below it, it
1141 will print it if there is enough information to do so (almost
1142 always), returning the error to the caller (i.e. http_loop).
1144 Various HTTP parameters are stored to hs.
1146 If PROXY is non-NULL, the connection will be made to the proxy
1147 server, and u->url will be requested. */
1149 gethttp (struct url *u, struct http_stat *hs, int *dt, struct url *proxy)
1151 struct request *req;
1154 char *user, *passwd;
1158 wgint contlen, contrange;
1165 /* Set to 1 when the authorization has failed permanently and should
1166 not be tried again. */
1167 bool auth_finished = false;
1169 /* Whether NTLM authentication is used for this request. */
1170 bool ntlm_seen = false;
1172 /* Whether our connection to the remote host is through SSL. */
1173 bool using_ssl = false;
1175 /* Whether a HEAD request will be issued (as opposed to GET or
1177 bool head_only = !!(*dt & HEAD_ONLY);
1180 struct response *resp;
1184 /* Whether this connection will be kept alive after the HTTP request
1188 /* Whether keep-alive should be inhibited.
1190 RFC 2068 requests that 1.0 clients not send keep-alive requests
1191 to proxies. This is because many 1.0 proxies do not interpret
1192 the Connection header and transfer it to the remote server,
1193 causing it to not close the connection and leave both the proxy
1194 and the client hanging. */
1195 bool inhibit_keep_alive =
1196 !opt.http_keep_alive || opt.ignore_length || proxy != NULL;
1198 /* Headers sent when using POST. */
1199 wgint post_data_size = 0;
1201 bool host_lookup_failed = false;
1204 if (u->scheme == SCHEME_HTTPS)
1206 /* Initialize the SSL context. After this has once been done,
1207 it becomes a no-op. */
1210 scheme_disable (SCHEME_HTTPS);
1211 logprintf (LOG_NOTQUIET,
1212 _("Disabling SSL due to encountered errors.\n"));
1213 return SSLINITFAILED;
1216 #endif /* HAVE_SSL */
1218 /* Initialize certain elements of struct http_stat. */
1222 hs->rderrmsg = NULL;
1224 hs->remote_time = NULL;
1229 /* Prepare the request to send. */
1231 req = request_new ();
1234 const char *meth = "GET";
1237 else if (opt.post_file_name || opt.post_data)
1239 /* Use the full path, i.e. one that includes the leading slash and
1240 the query string. E.g. if u->path is "foo/bar" and u->query is
1241 "param=value", full_path will be "/foo/bar?param=value". */
1244 /* When using SSL over proxy, CONNECT establishes a direct
1245 connection to the HTTPS server. Therefore use the same
1246 argument as when talking to the server directly. */
1247 && u->scheme != SCHEME_HTTPS
1250 meth_arg = xstrdup (u->url);
1252 meth_arg = url_full_path (u);
1253 request_set_method (req, meth, meth_arg);
1256 request_set_header (req, "Referer", (char *) hs->referer, rel_none);
1257 if (*dt & SEND_NOCACHE)
1258 request_set_header (req, "Pragma", "no-cache", rel_none);
1260 request_set_header (req, "Range",
1261 aprintf ("bytes=%s-",
1262 number_to_static_string (hs->restval)),
1264 SET_USER_AGENT (req);
1265 request_set_header (req, "Accept", "*/*", rel_none);
1267 /* Find the username and password for authentication. */
1270 search_netrc (u->host, (const char **)&user, (const char **)&passwd, 0);
1271 user = user ? user : (opt.http_user ? opt.http_user : opt.user);
1272 passwd = passwd ? passwd : (opt.http_passwd ? opt.http_passwd : opt.passwd);
1276 /* We have the username and the password, but haven't tried
1277 any authorization yet. Let's see if the "Basic" method
1278 works. If not, we'll come back here and construct a
1279 proper authorization method with the right challenges.
1281 If we didn't employ this kind of logic, every URL that
1282 requires authorization would have to be processed twice,
1283 which is very suboptimal and generates a bunch of false
1284 "unauthorized" errors in the server log.
1286 #### But this logic also has a serious problem when used
1287 with stronger authentications: we *first* transmit the
1288 username and the password in clear text, and *then* attempt a
1289 stronger authentication scheme. That cannot be right! We
1290 are only fortunate that almost everyone still uses the
1291 `Basic' scheme anyway.
1293 There should be an option to prevent this from happening, for
1294 those who use strong authentication schemes and value their
1296 request_set_header (req, "Authorization",
1297 basic_authentication_encode (user, passwd),
1304 char *proxy_user, *proxy_passwd;
1305 /* For normal username and password, URL components override
1306 command-line/wgetrc parameters. With proxy
1307 authentication, it's the reverse, because proxy URLs are
1308 normally the "permanent" ones, so command-line args
1309 should take precedence. */
1310 if (opt.proxy_user && opt.proxy_passwd)
1312 proxy_user = opt.proxy_user;
1313 proxy_passwd = opt.proxy_passwd;
1317 proxy_user = proxy->user;
1318 proxy_passwd = proxy->passwd;
1320 /* #### This does not appear right. Can't the proxy request,
1321 say, `Digest' authentication? */
1322 if (proxy_user && proxy_passwd)
1323 proxyauth = basic_authentication_encode (proxy_user, proxy_passwd);
1325 /* If we're using a proxy, we will be connecting to the proxy
1329 /* Proxy authorization over SSL is handled below. */
1331 if (u->scheme != SCHEME_HTTPS)
1333 request_set_header (req, "Proxy-Authorization", proxyauth, rel_value);
1336 /* Generate the Host header, HOST:PORT. Take into account that:
1338 - Broken server-side software often doesn't recognize the PORT
1339 argument, so we must generate "Host: www.server.com" instead of
1340 "Host: www.server.com:80" (and likewise for https port).
1342 - IPv6 addresses contain ":", so "Host: 3ffe:8100:200:2::2:1234"
1343 becomes ambiguous and needs to be rewritten as "Host:
1344 [3ffe:8100:200:2::2]:1234". */
1346 /* Formats arranged for hfmt[add_port][add_squares]. */
1347 static const char *hfmt[][2] = {
1348 { "%s", "[%s]" }, { "%s:%d", "[%s]:%d" }
1350 int add_port = u->port != scheme_default_port (u->scheme);
1351 int add_squares = strchr (u->host, ':') != NULL;
1352 request_set_header (req, "Host",
1353 aprintf (hfmt[add_port][add_squares], u->host, u->port),
1357 if (!inhibit_keep_alive)
1358 request_set_header (req, "Connection", "Keep-Alive", rel_none);
1361 request_set_header (req, "Cookie",
1362 cookie_header (wget_cookie_jar,
1363 u->host, u->port, u->path,
1365 u->scheme == SCHEME_HTTPS
1372 if (opt.post_data || opt.post_file_name)
1374 request_set_header (req, "Content-Type",
1375 "application/x-www-form-urlencoded", rel_none);
1377 post_data_size = strlen (opt.post_data);
1380 post_data_size = file_size (opt.post_file_name);
1381 if (post_data_size == -1)
1383 logprintf (LOG_NOTQUIET, _("POST data file `%s' missing: %s\n"),
1384 opt.post_file_name, strerror (errno));
1388 request_set_header (req, "Content-Length",
1389 xstrdup (number_to_static_string (post_data_size)),
1393 /* Add the user headers. */
1394 if (opt.user_headers)
1397 for (i = 0; opt.user_headers[i]; i++)
1398 request_set_user_header (req, opt.user_headers[i]);
1402 /* We need to come back here when the initial attempt to retrieve
1403 without authorization header fails. (Expected to happen at least
1404 for the Digest authorization scheme.) */
1408 /* Establish the connection. */
1410 if (!inhibit_keep_alive)
1412 /* Look for a persistent connection to target host, unless a
1413 proxy is used. The exception is when SSL is in use, in which
1414 case the proxy is nothing but a passthrough to the target
1415 host, registered as a connection to the latter. */
1416 struct url *relevant = conn;
1418 if (u->scheme == SCHEME_HTTPS)
1422 if (persistent_available_p (relevant->host, relevant->port,
1424 relevant->scheme == SCHEME_HTTPS,
1428 &host_lookup_failed))
1430 sock = pconn.socket;
1431 using_ssl = pconn.ssl;
1432 logprintf (LOG_VERBOSE, _("Reusing existing connection to %s:%d.\n"),
1433 escnonprint (pconn.host), pconn.port);
1434 DEBUGP (("Reusing fd %d.\n", sock));
1435 if (pconn.authorized)
1436 /* If the connection is already authorized, the "Basic"
1437 authorization added by code above is unnecessary and
1439 request_remove_header (req, "Authorization");
1445 /* In its current implementation, persistent_available_p will
1446 look up conn->host in some cases. If that lookup failed, we
1447 don't need to bother with connect_to_host. */
1448 if (host_lookup_failed)
1454 sock = connect_to_host (conn->host, conn->port);
1463 return (retryable_socket_connect_error (errno)
1464 ? CONERROR : CONIMPOSSIBLE);
1468 if (proxy && u->scheme == SCHEME_HTTPS)
1470 /* When requesting SSL URLs through proxies, use the
1471 CONNECT method to request passthrough. */
1472 struct request *connreq = request_new ();
1473 request_set_method (connreq, "CONNECT",
1474 aprintf ("%s:%d", u->host, u->port));
1475 SET_USER_AGENT (connreq);
1478 request_set_header (connreq, "Proxy-Authorization",
1479 proxyauth, rel_value);
1480 /* Now that PROXYAUTH is part of the CONNECT request,
1481 zero it out so we don't send proxy authorization with
1482 the regular request below. */
1485 /* Examples in rfc2817 use the Host header in CONNECT
1486 requests. I don't see how that gains anything, given
1487 that the contents of Host would be exactly the same as
1488 the contents of CONNECT. */
1490 write_error = request_send (connreq, sock);
1491 request_free (connreq);
1492 if (write_error < 0)
1494 CLOSE_INVALIDATE (sock);
1498 head = read_http_response_head (sock);
1501 logprintf (LOG_VERBOSE, _("Failed reading proxy response: %s\n"),
1503 CLOSE_INVALIDATE (sock);
1512 DEBUGP (("proxy responded with: [%s]\n", head));
1514 resp = resp_new (head);
1515 statcode = resp_status (resp, &message);
1518 if (statcode != 200)
1521 logprintf (LOG_NOTQUIET, _("Proxy tunneling failed: %s"),
1522 message ? escnonprint (message) : "?");
1523 xfree_null (message);
1526 xfree_null (message);
1528 /* SOCK is now *really* connected to u->host, so update CONN
1529 to reflect this. That way register_persistent will
1530 register SOCK as being connected to u->host:u->port. */
1534 if (conn->scheme == SCHEME_HTTPS)
1536 if (!ssl_connect (sock) || !ssl_check_certificate (sock, u->host))
1543 #endif /* HAVE_SSL */
1546 /* Send the request to server. */
1547 write_error = request_send (req, sock);
1549 if (write_error >= 0)
1553 DEBUGP (("[POST data: %s]\n", opt.post_data));
1554 write_error = fd_write (sock, opt.post_data, post_data_size, -1);
1556 else if (opt.post_file_name && post_data_size != 0)
1557 write_error = post_file (sock, opt.post_file_name, post_data_size);
1560 if (write_error < 0)
1562 CLOSE_INVALIDATE (sock);
1566 logprintf (LOG_VERBOSE, _("%s request sent, awaiting response... "),
1567 proxy ? "Proxy" : "HTTP");
1572 head = read_http_response_head (sock);
1577 logputs (LOG_NOTQUIET, _("No data received.\n"));
1578 CLOSE_INVALIDATE (sock);
1584 logprintf (LOG_NOTQUIET, _("Read error (%s) in headers.\n"),
1586 CLOSE_INVALIDATE (sock);
1591 DEBUGP (("\n---response begin---\n%s---response end---\n", head));
1593 resp = resp_new (head);
1595 /* Check for status line. */
1597 statcode = resp_status (resp, &message);
1598 if (!opt.server_response)
1599 logprintf (LOG_VERBOSE, "%2d %s\n", statcode,
1600 message ? escnonprint (message) : "");
1603 logprintf (LOG_VERBOSE, "\n");
1604 print_server_response (resp, " ");
1607 /* Determine the local filename if needed. Notice that if -O is used
1608 * hstat.local_file is set by http_loop to the argument of -O. */
1609 if (!hs->local_file)
1611 if (resp_header_copy (resp, "Content-Disposition", hdrval, sizeof (hdrval)))
1612 /* Honor Content-Disposition. */
1614 hs->local_file = xstrdup (hdrval);
1617 /* Choose filename according to URL name. */
1619 hs->local_file = url_file_name (u);
1623 /* TODO: perform this check only once. */
1624 if (opt.noclobber && file_exists_p (hs->local_file))
1626 /* If opt.noclobber is turned on and file already exists, do not
1627 retrieve the file */
1628 logprintf (LOG_VERBOSE, _("\
1629 File `%s' already there; not retrieving.\n\n"), hs->local_file);
1630 /* If the file is there, we suppose it's retrieved OK. */
1633 /* #### Bogusness alert. */
1634 /* If its suffix is "html" or "htm" or similar, assume text/html. */
1635 if (has_html_suffix_p (hs->local_file))
1641 /* Support timestamping */
1642 /* TODO: move this code out of gethttp. */
1643 if (opt.timestamping && !hs->timestamp_checked)
1645 size_t filename_len = strlen (hs->local_file);
1646 char *filename_plus_orig_suffix = alloca (filename_len + sizeof (".orig"));
1647 bool local_dot_orig_file_exists = false;
1648 char *local_filename = NULL;
1651 if (opt.backup_converted)
1652 /* If -K is specified, we'll act on the assumption that it was specified
1653 last time these files were downloaded as well, and instead of just
1654 comparing local file X against server file X, we'll compare local
1655 file X.orig (if extant, else X) against server file X. If -K
1656 _wasn't_ specified last time, or the server contains files called
1657 *.orig, -N will be back to not operating correctly with -k. */
1659 /* Would a single s[n]printf() call be faster? --dan
1661 Definitely not. sprintf() is horribly slow. It's a
1662 different question whether the difference between the two
1663 affects a program. Usually I'd say "no", but at one
1664 point I profiled Wget, and found that a measurable and
1665 non-negligible amount of time was lost calling sprintf()
1666 in url.c. Replacing sprintf with inline calls to
1667 strcpy() and number_to_string() made a difference.
1669 memcpy (filename_plus_orig_suffix, hs->local_file, filename_len);
1670 memcpy (filename_plus_orig_suffix + filename_len,
1671 ".orig", sizeof (".orig"));
1673 /* Try to stat() the .orig file. */
1674 if (stat (filename_plus_orig_suffix, &st) == 0)
1676 local_dot_orig_file_exists = 1;
1677 local_filename = filename_plus_orig_suffix;
1681 if (!local_dot_orig_file_exists)
1682 /* Couldn't stat() <file>.orig, so try to stat() <file>. */
1683 if (stat (hs->local_file, &st) == 0)
1684 local_filename = hs->local_file;
1686 if (local_filename != NULL)
1687 /* There was a local file, so we'll check later to see if the version
1688 the server has is the same version we already have, allowing us to
1691 hs->orig_file_name = xstrdup (local_filename);
1692 hs->orig_file_size = st.st_size;
1693 hs->orig_file_tstamp = st.st_mtime;
1695 /* Modification time granularity is 2 seconds for Windows, so
1696 increase local time by 1 second for later comparison. */
1697 ++hs->orig_file_tstamp;
1702 if (!opt.ignore_length
1703 && resp_header_copy (resp, "Content-Length", hdrval, sizeof (hdrval)))
1707 parsed = str_to_wgint (hdrval, NULL, 10);
1708 if (parsed == WGINT_MAX && errno == ERANGE)
1710 #### If Content-Length is out of range, it most likely
1711 means that the file is larger than 2G and that we're
1712 compiled without LFS. In that case we should probably
1713 refuse to even attempt to download the file. */
1719 /* Check for keep-alive related responses. */
1720 if (!inhibit_keep_alive && contlen != -1)
1722 if (resp_header_copy (resp, "Keep-Alive", NULL, 0))
1724 else if (resp_header_copy (resp, "Connection", hdrval, sizeof (hdrval)))
1726 if (0 == strcasecmp (hdrval, "Keep-Alive"))
1731 /* The server has promised that it will not close the connection
1732 when we're done. This means that we can register it. */
1733 register_persistent (conn->host, conn->port, sock, using_ssl);
1735 if (statcode == HTTP_STATUS_UNAUTHORIZED)
1737 /* Authorization is required. */
1738 if (keep_alive && !head_only && skip_short_body (sock, contlen))
1739 CLOSE_FINISH (sock);
1741 CLOSE_INVALIDATE (sock);
1742 pconn.authorized = false;
1743 if (!auth_finished && (user && passwd))
1745 /* IIS sends multiple copies of WWW-Authenticate, one with
1746 the value "negotiate", and other(s) with data. Loop over
1747 all the occurrences and pick the one we recognize. */
1749 const char *wabeg, *waend;
1750 char *www_authenticate = NULL;
1752 (wapos = resp_header_locate (resp, "WWW-Authenticate", wapos,
1753 &wabeg, &waend)) != -1;
1755 if (known_authentication_scheme_p (wabeg, waend))
1757 BOUNDED_TO_ALLOCA (wabeg, waend, www_authenticate);
1761 if (!www_authenticate)
1762 /* If the authentication header is missing or
1763 unrecognized, there's no sense in retrying. */
1764 logputs (LOG_NOTQUIET, _("Unknown authentication scheme.\n"));
1765 else if (BEGINS_WITH (www_authenticate, "Basic"))
1766 /* If the authentication scheme is "Basic", which we send
1767 by default, there's no sense in retrying either. (This
1768 should be changed when we stop sending "Basic" data by
1774 pth = url_full_path (u);
1775 request_set_header (req, "Authorization",
1776 create_authorization_line (www_authenticate,
1778 request_method (req),
1782 if (BEGINS_WITH (www_authenticate, "NTLM"))
1785 goto retry_with_auth;
1788 logputs (LOG_NOTQUIET, _("Authorization failed.\n"));
1792 else /* statcode != HTTP_STATUS_UNAUTHORIZED */
1794 /* Kludge: if NTLM is used, mark the TCP connection as authorized. */
1796 pconn.authorized = true;
1800 hs->statcode = statcode;
1802 hs->error = xstrdup (_("Malformed status line"));
1804 hs->error = xstrdup (_("(no description)"));
1806 hs->error = xstrdup (message);
1807 xfree_null (message);
1809 type = resp_header_strdup (resp, "Content-Type");
1812 char *tmp = strchr (type, ';');
1815 while (tmp > type && ISSPACE (tmp[-1]))
1820 hs->newloc = resp_header_strdup (resp, "Location");
1821 hs->remote_time = resp_header_strdup (resp, "Last-Modified");
1823 /* Handle (possibly multiple instances of) the Set-Cookie header. */
1827 const char *scbeg, *scend;
1828 /* The jar should have been created by now. */
1829 assert (wget_cookie_jar != NULL);
1831 (scpos = resp_header_locate (resp, "Set-Cookie", scpos,
1832 &scbeg, &scend)) != -1;
1835 char *set_cookie; BOUNDED_TO_ALLOCA (scbeg, scend, set_cookie);
1836 cookie_handle_set_cookie (wget_cookie_jar, u->host, u->port,
1837 u->path, set_cookie);
1841 if (resp_header_copy (resp, "Content-Range", hdrval, sizeof (hdrval)))
1843 wgint first_byte_pos, last_byte_pos, entity_length;
1844 if (parse_content_range (hdrval, &first_byte_pos, &last_byte_pos,
1846 contrange = first_byte_pos;
1850 /* 20x responses are counted among successful by default. */
1851 if (H_20X (statcode))
1854 /* Return if redirected. */
1855 if (H_REDIRECTED (statcode) || statcode == HTTP_STATUS_MULTIPLE_CHOICES)
1857 /* RFC2068 says that in case of the 300 (multiple choices)
1858 response, the server can output a preferred URL through
1859 `Location' header; otherwise, the request should be treated
1860 like GET. So, if the location is set, it will be a
1861 redirection; otherwise, just proceed normally. */
1862 if (statcode == HTTP_STATUS_MULTIPLE_CHOICES && !hs->newloc)
1866 logprintf (LOG_VERBOSE,
1867 _("Location: %s%s\n"),
1868 hs->newloc ? escnonprint_uri (hs->newloc) : _("unspecified"),
1869 hs->newloc ? _(" [following]") : "");
1870 if (keep_alive && !head_only && skip_short_body (sock, contlen))
1871 CLOSE_FINISH (sock);
1873 CLOSE_INVALIDATE (sock);
1879 /* If content-type is not given, assume text/html. This is because
1880 of the multitude of broken CGI's that "forget" to generate the
1883 0 == strncasecmp (type, TEXTHTML_S, strlen (TEXTHTML_S)) ||
1884 0 == strncasecmp (type, TEXTXHTML_S, strlen (TEXTXHTML_S)))
1889 if (opt.html_extension && (*dt & TEXTHTML))
1890 /* -E / --html-extension / html_extension = on was specified, and this is a
1891 text/html file. If some case-insensitive variation on ".htm[l]" isn't
1892 already the file's suffix, tack on ".html". */
1894 char *last_period_in_local_filename = strrchr (hs->local_file, '.');
1896 if (last_period_in_local_filename == NULL
1897 || !(0 == strcasecmp (last_period_in_local_filename, ".htm")
1898 || 0 == strcasecmp (last_period_in_local_filename, ".html")))
1900 int local_filename_len = strlen (hs->local_file);
1901 /* Resize the local file, allowing for ".html" preceded by
1902 optional ".NUMBER". */
1903 hs->local_file = xrealloc (hs->local_file,
1904 local_filename_len + 24 + sizeof (".html"));
1905 strcpy(hs->local_file + local_filename_len, ".html");
1906 /* If clobbering is not allowed and the file, as named,
1907 exists, tack on ".NUMBER.html" instead. */
1912 sprintf (hs->local_file + local_filename_len,
1913 ".%d.html", ext_num++);
1914 while (file_exists_p (hs->local_file));
1916 *dt |= ADDED_HTML_EXTENSION;
1920 if (statcode == HTTP_STATUS_RANGE_NOT_SATISFIABLE)
1922 /* If `-c' is in use and the file has been fully downloaded (or
1923 the remote file has shrunk), Wget effectively requests bytes
1924 after the end of file and the server response with 416. */
1925 logputs (LOG_VERBOSE, _("\
1926 \n The file is already fully retrieved; nothing to do.\n\n"));
1927 /* In case the caller inspects. */
1930 /* Mark as successfully retrieved. */
1933 CLOSE_INVALIDATE (sock); /* would be CLOSE_FINISH, but there
1934 might be more bytes in the body. */
1935 return RETRUNNEEDED;
1937 if ((contrange != 0 && contrange != hs->restval)
1938 || (H_PARTIAL (statcode) && !contrange))
1940 /* The Range request was somehow misunderstood by the server.
1943 CLOSE_INVALIDATE (sock);
1946 hs->contlen = contlen + contrange;
1952 /* No need to print this output if the body won't be
1953 downloaded at all, or if the original server response is
1955 logputs (LOG_VERBOSE, _("Length: "));
1958 logputs (LOG_VERBOSE, number_to_static_string (contlen + contrange));
1959 if (contlen + contrange >= 1024)
1960 logprintf (LOG_VERBOSE, " (%s)",
1961 human_readable (contlen + contrange));
1964 if (contlen >= 1024)
1965 logprintf (LOG_VERBOSE, _(", %s (%s) remaining"),
1966 number_to_static_string (contlen),
1967 human_readable (contlen));
1969 logprintf (LOG_VERBOSE, _(", %s remaining"),
1970 number_to_static_string (contlen));
1974 logputs (LOG_VERBOSE,
1975 opt.ignore_length ? _("ignored") : _("unspecified"));
1977 logprintf (LOG_VERBOSE, " [%s]\n", escnonprint (type));
1979 logputs (LOG_VERBOSE, "\n");
1983 type = NULL; /* We don't need it any more. */
1985 /* Return if we have no intention of further downloading. */
1986 if (!(*dt & RETROKF) || head_only)
1988 /* In case the caller cares to look... */
1993 /* Pre-1.10 Wget used CLOSE_INVALIDATE here. Now we trust the
1994 servers not to send body in response to a HEAD request, and
1995 those that do will likely be caught by test_socket_open.
1996 If not, they can be worked around using
1997 `--no-http-keep-alive'. */
1998 CLOSE_FINISH (sock);
1999 else if (keep_alive && skip_short_body (sock, contlen))
2000 /* Successfully skipped the body; also keep using the socket. */
2001 CLOSE_FINISH (sock);
2003 CLOSE_INVALIDATE (sock);
2004 return RETRFINISHED;
2007 /* Print fetch message, if opt.verbose. */
2010 logprintf (LOG_NOTQUIET, _("Saving to: `%s'\n"),
2011 HYPHENP (hs->local_file) ? "STDOUT" : hs->local_file);
2014 /* Open the local file. */
2017 mkalldirs (hs->local_file);
2019 rotate_backups (hs->local_file);
2021 fp = fopen (hs->local_file, "ab");
2022 else if (ALLOW_CLOBBER)
2023 fp = fopen (hs->local_file, "wb");
2026 fp = fopen_excl (hs->local_file, true);
2027 if (!fp && errno == EEXIST)
2029 /* We cannot just invent a new name and use it (which is
2030 what functions like unique_create typically do)
2031 because we told the user we'd use this name.
2032 Instead, return and retry the download. */
2033 logprintf (LOG_NOTQUIET,
2034 _("%s has sprung into existence.\n"),
2036 CLOSE_INVALIDATE (sock);
2037 return FOPEN_EXCL_ERR;
2042 logprintf (LOG_NOTQUIET, "%s: %s\n", hs->local_file, strerror (errno));
2043 CLOSE_INVALIDATE (sock);
2050 /* This confuses the timestamping code that checks for file size.
2051 #### The timestamping code should be smarter about file size. */
2052 if (opt.save_headers && hs->restval == 0)
2053 fwrite (head, 1, strlen (head), fp);
2055 /* Now we no longer need to store the response header. */
2058 /* Download the request body. */
2061 /* If content-length is present, read that much; otherwise, read
2062 until EOF. The HTTP spec doesn't require the server to
2063 actually close the connection when it's done sending data. */
2064 flags |= rb_read_exactly;
2065 if (hs->restval > 0 && contrange == 0)
2066 /* If the server ignored our range request, instruct fd_read_body
2067 to skip the first RESTVAL bytes of body. */
2068 flags |= rb_skip_startpos;
2069 hs->len = hs->restval;
2071 hs->res = fd_read_body (sock, fp, contlen != -1 ? contlen : 0,
2072 hs->restval, &hs->rd_size, &hs->len, &hs->dltime,
2076 CLOSE_FINISH (sock);
2080 hs->rderrmsg = xstrdup (fd_errstr (sock));
2081 CLOSE_INVALIDATE (sock);
2088 return RETRFINISHED;
2091 /* The genuine HTTP loop! This is the part where the retrieval is
2092 retried, and retried, and retried, and... */
2094 http_loop (struct url *u, char **newloc, char **local_file, const char *referer,
2095 int *dt, struct url *proxy)
2098 bool got_head = false; /* used for time-stamping */
2102 time_t tmr = -1; /* remote time-stamp */
2103 wgint local_size = 0; /* the size of the local file */
2104 struct http_stat hstat; /* HTTP status */
2107 /* Assert that no value for *LOCAL_FILE was passed. */
2108 assert (local_file == NULL || *local_file == NULL);
2110 /* Set LOCAL_FILE parameter. */
2111 if (local_file && opt.output_document)
2112 *local_file = HYPHENP (opt.output_document) ? NULL : xstrdup (opt.output_document);
2114 /* Reset NEWLOC parameter. */
2117 /* This used to be done in main(), but it's a better idea to do it
2118 here so that we don't go through the hoops if we're just using
2123 /* Warn on (likely bogus) wildcard usage in HTTP. */
2124 if (opt.ftp_glob && has_wildcards_p (u->path))
2125 logputs (LOG_VERBOSE, _("Warning: wildcards not supported in HTTP.\n"));
2127 /* Setup hstat struct. */
2129 hstat.referer = referer;
2131 if (opt.output_document)
2132 hstat.local_file = xstrdup (opt.output_document);
2134 /* Reset the counter. */
2137 /* Reset the document type. */
2143 /* Increment the pass counter. */
2145 sleep_between_retrievals (count);
2147 /* Get the current time string. */
2148 tms = time_str (NULL);
2150 /* Print fetch message, if opt.verbose. */
2153 char *hurl = url_string (u, true);
2158 sprintf (tmp, _("(try:%2d)"), count);
2159 logprintf (LOG_NOTQUIET, "--%s-- %s %s\n",
2164 logprintf (LOG_NOTQUIET, "--%s-- %s\n",
2169 ws_changetitle (hurl);
2174 /* Default document type is empty. However, if spider mode is
2175 on or time-stamping is employed, HEAD_ONLY commands is
2176 encoded within *dt. */
2177 if (opt.spider || (opt.timestamping && !got_head))
2182 /* Decide whether or not to restart. */
2184 && stat (hstat.local_file, &st) == 0
2185 && S_ISREG (st.st_mode))
2186 /* When -c is used, continue from on-disk size. (Can't use
2187 hstat.len even if count>1 because we don't want a failed
2188 first attempt to clobber existing data.) */
2189 hstat.restval = st.st_size;
2191 /* otherwise, continue where the previous try left off */
2192 hstat.restval = hstat.len;
2196 /* Decide whether to send the no-cache directive. We send it in
2198 a) we're using a proxy, and we're past our first retrieval.
2199 Some proxies are notorious for caching incomplete data, so
2200 we require a fresh get.
2201 b) caching is explicitly inhibited. */
2202 if ((proxy && count > 1) /* a */
2203 || !opt.allow_cache /* b */
2205 *dt |= SEND_NOCACHE;
2207 *dt &= ~SEND_NOCACHE;
2209 /* Try fetching the document, or at least its head. */
2210 err = gethttp (u, &hstat, dt, proxy);
2213 tms = time_str (NULL);
2215 /* Get the new location (with or without the redirection). */
2217 *newloc = xstrdup (hstat.newloc);
2221 case HERR: case HEOF: case CONSOCKERR: case CONCLOSED:
2222 case CONERROR: case READERR: case WRITEFAILED:
2223 case RANGEERR: case FOPEN_EXCL_ERR:
2224 /* Non-fatal errors continue executing the loop, which will
2225 bring them to "while" statement at the end, to judge
2226 whether the number of tries was exceeded. */
2227 /* free_hstat (&hstat); */
2228 printwhat (count, opt.ntry);
2230 case HOSTERR: case CONIMPOSSIBLE: case PROXERR: case AUTHFAILED:
2231 case SSLINITFAILED: case CONTNOTSUPPORTED:
2232 /* Fatal errors just return from the function. */
2233 free_hstat (&hstat);
2235 case FWRITEERR: case FOPENERR:
2236 /* Another fatal error. */
2237 logputs (LOG_VERBOSE, "\n");
2238 logprintf (LOG_NOTQUIET, _("Cannot write to `%s' (%s).\n"),
2239 hstat.local_file, strerror (errno));
2240 free_hstat (&hstat);
2243 /* Another fatal error. */
2244 logprintf (LOG_NOTQUIET, _("Unable to establish SSL connection.\n"));
2245 free_hstat (&hstat);
2248 /* Return the new location to the caller. */
2251 logprintf (LOG_NOTQUIET,
2252 _("ERROR: Redirection (%d) without location.\n"),
2254 free_hstat (&hstat);
2257 free_hstat (&hstat);
2260 /* The file was already fully retrieved. */
2261 free_hstat (&hstat);
2264 /* Deal with you later. */
2267 /* All possibilities should have been exhausted. */
2271 if (!(*dt & RETROKF))
2275 /* #### Ugly ugly ugly! */
2276 char *hurl = url_string (u, true);
2277 logprintf (LOG_NONVERBOSE, "%s:\n", hurl);
2280 logprintf (LOG_NOTQUIET, _("%s ERROR %d: %s.\n"),
2281 tms, hstat.statcode, escnonprint (hstat.error));
2282 logputs (LOG_VERBOSE, "\n");
2283 free_hstat (&hstat);
2287 /* Did we get the time-stamp? */
2290 if (opt.timestamping && !hstat.remote_time)
2292 logputs (LOG_NOTQUIET, _("\
2293 Last-modified header missing -- time-stamps turned off.\n"));
2295 else if (hstat.remote_time)
2297 /* Convert the date-string into struct tm. */
2298 tmr = http_atotm (hstat.remote_time);
2299 if (tmr == (time_t) (-1))
2300 logputs (LOG_VERBOSE, _("\
2301 Last-modified header invalid -- time-stamp ignored.\n"));
2305 /* The time-stamping section. */
2306 if (opt.timestamping && !got_head)
2308 got_head = true; /* no more time-stamping */
2310 count = 0; /* the retrieve count for HEAD is reset */
2312 if (hstat.remote_time && tmr != (time_t) (-1))
2314 /* Now time-stamping can be used validly. Time-stamping
2315 means that if the sizes of the local and remote file
2316 match, and local file is newer than the remote file,
2317 it will not be retrieved. Otherwise, the normal
2318 download procedure is resumed. */
2319 if (hstat.orig_file_tstamp >= tmr)
2321 if (hstat.contlen == -1 || hstat.orig_file_size == hstat.contlen)
2323 logprintf (LOG_VERBOSE, _("\
2324 Server file no newer than local file `%s' -- not retrieving.\n\n"),
2325 hstat.orig_file_name);
2326 free_hstat (&hstat);
2331 logprintf (LOG_VERBOSE, _("\
2332 The sizes do not match (local %s) -- retrieving.\n"),
2333 number_to_static_string (local_size));
2337 logputs (LOG_VERBOSE,
2338 _("Remote file is newer, retrieving.\n"));
2340 logputs (LOG_VERBOSE, "\n");
2343 /* free_hstat (&hstat); */
2344 hstat.timestamp_checked = true;
2348 if ((tmr != (time_t) (-1))
2350 && ((hstat.len == hstat.contlen) ||
2351 ((hstat.res == 0) && (hstat.contlen == -1))))
2353 /* #### This code repeats in http.c and ftp.c. Move it to a
2355 const char *fl = NULL;
2356 if (opt.output_document)
2358 if (output_stream_regular)
2359 fl = opt.output_document;
2362 fl = hstat.local_file;
2366 /* End of time-stamping section. */
2370 logprintf (LOG_NOTQUIET, "%d %s\n\n", hstat.statcode,
2371 escnonprint (hstat.error));
2375 tmrate = retr_rate (hstat.rd_size, hstat.dltime);
2376 total_download_time += hstat.dltime;
2378 if (hstat.len == hstat.contlen)
2382 logprintf (LOG_VERBOSE,
2383 _("%s (%s) - `%s' saved [%s/%s]\n\n"),
2384 tms, tmrate, hstat.local_file,
2385 number_to_static_string (hstat.len),
2386 number_to_static_string (hstat.contlen));
2387 logprintf (LOG_NONVERBOSE,
2388 "%s URL:%s [%s/%s] -> \"%s\" [%d]\n",
2390 number_to_static_string (hstat.len),
2391 number_to_static_string (hstat.contlen),
2392 hstat.local_file, count);
2395 total_downloaded_bytes += hstat.len;
2397 /* Remember that we downloaded the file for later ".orig" code. */
2398 if (*dt & ADDED_HTML_EXTENSION)
2399 downloaded_file(FILE_DOWNLOADED_AND_HTML_EXTENSION_ADDED, hstat.local_file);
2401 downloaded_file(FILE_DOWNLOADED_NORMALLY, hstat.local_file);
2403 free_hstat (&hstat);
2406 else if (hstat.res == 0) /* No read error */
2408 if (hstat.contlen == -1) /* We don't know how much we were supposed
2409 to get, so assume we succeeded. */
2413 logprintf (LOG_VERBOSE,
2414 _("%s (%s) - `%s' saved [%s]\n\n"),
2415 tms, tmrate, hstat.local_file,
2416 number_to_static_string (hstat.len));
2417 logprintf (LOG_NONVERBOSE,
2418 "%s URL:%s [%s] -> \"%s\" [%d]\n",
2419 tms, u->url, number_to_static_string (hstat.len),
2420 hstat.local_file, count);
2423 total_downloaded_bytes += hstat.len;
2425 /* Remember that we downloaded the file for later ".orig" code. */
2426 if (*dt & ADDED_HTML_EXTENSION)
2427 downloaded_file(FILE_DOWNLOADED_AND_HTML_EXTENSION_ADDED, hstat.local_file);
2429 downloaded_file(FILE_DOWNLOADED_NORMALLY, hstat.local_file);
2431 free_hstat (&hstat);
2434 else if (hstat.len < hstat.contlen) /* meaning we lost the
2435 connection too soon */
2437 logprintf (LOG_VERBOSE,
2438 _("%s (%s) - Connection closed at byte %s. "),
2439 tms, tmrate, number_to_static_string (hstat.len));
2440 printwhat (count, opt.ntry);
2441 /* free_hstat (&hstat); */
2445 /* Getting here would mean reading more data than
2446 requested with content-length, which we never do. */
2449 else /* from now on hstat.res can only be -1 */
2451 if (hstat.contlen == -1)
2453 logprintf (LOG_VERBOSE,
2454 _("%s (%s) - Read error at byte %s (%s)."),
2455 tms, tmrate, number_to_static_string (hstat.len),
2457 printwhat (count, opt.ntry);
2458 /* free_hstat (&hstat); */
2461 else /* hstat.res == -1 and contlen is given */
2463 logprintf (LOG_VERBOSE,
2464 _("%s (%s) - Read error at byte %s/%s (%s). "),
2466 number_to_static_string (hstat.len),
2467 number_to_static_string (hstat.contlen),
2469 printwhat (count, opt.ntry);
2470 /* free_hstat (&hstat); */
2476 while (!opt.ntry || (count < opt.ntry));
2481 /* Check whether the result of strptime() indicates success.
2482 strptime() returns the pointer to how far it got to in the string.
2483 The processing has been successful if the string is at `GMT' or
2484 `+X', or at the end of the string.
2486 In extended regexp parlance, the function returns 1 if P matches
2487 "^ *(GMT|[+-][0-9]|$)", 0 otherwise. P being NULL (which strptime
2488 can return) is considered a failure and 0 is returned. */
2490 check_end (const char *p)
2494 while (ISSPACE (*p))
2497 || (p[0] == 'G' && p[1] == 'M' && p[2] == 'T')
2498 || ((p[0] == '+' || p[0] == '-') && ISDIGIT (p[1])))
2504 /* Convert the textual specification of time in TIME_STRING to the
2505 number of seconds since the Epoch.
2507 TIME_STRING can be in any of the three formats RFC2616 allows the
2508 HTTP servers to emit -- RFC1123-date, RFC850-date or asctime-date,
2509 as well as the time format used in the Set-Cookie header.
2510 Timezones are ignored, and should be GMT.
2512 Return the computed time_t representation, or -1 if the conversion
2515 This function uses strptime with various string formats for parsing
2516 TIME_STRING. This results in a parser that is not as lenient in
2517 interpreting TIME_STRING as I would like it to be. Being based on
2518 strptime, it always allows shortened months, one-digit days, etc.,
2519 but due to the multitude of formats in which time can be
2520 represented, an ideal HTTP time parser would be even more
2521 forgiving. It should completely ignore things like week days and
2522 concentrate only on the various forms of representing years,
2523 months, days, hours, minutes, and seconds. For example, it would
2524 be nice if it accepted ISO 8601 out of the box.
2526 I've investigated free and PD code for this purpose, but none was
2527 usable. getdate was big and unwieldy, and had potential copyright
2528 issues, or so I was informed. Dr. Marcus Hennecke's atotm(),
2529 distributed with phttpd, is excellent, but we cannot use it because
2530 it is not assigned to the FSF. So I stuck it with strptime. */
2533 http_atotm (const char *time_string)
2535 /* NOTE: Solaris strptime man page claims that %n and %t match white
2536 space, but that's not universally available. Instead, we simply
2537 use ` ' to mean "skip all WS", which works under all strptime
2538 implementations I've tested. */
2540 static const char *time_formats[] = {
2541 "%a, %d %b %Y %T", /* rfc1123: Thu, 29 Jan 1998 22:12:57 */
2542 "%A, %d-%b-%y %T", /* rfc850: Thursday, 29-Jan-98 22:12:57 */
2543 "%a %b %d %T %Y", /* asctime: Thu Jan 29 22:12:57 1998 */
2544 "%a, %d-%b-%Y %T" /* cookies: Thu, 29-Jan-1998 22:12:57
2545 (used in Set-Cookie, defined in the
2546 Netscape cookie specification.) */
2548 const char *oldlocale;
2550 time_t ret = (time_t) -1;
2552 /* Solaris strptime fails to recognize English month names in
2553 non-English locales, which we work around by temporarily setting
2554 locale to C before invoking strptime. */
2555 oldlocale = setlocale (LC_TIME, NULL);
2556 setlocale (LC_TIME, "C");
2558 for (i = 0; i < countof (time_formats); i++)
2562 /* Some versions of strptime use the existing contents of struct
2563 tm to recalculate the date according to format. Zero it out
2564 to prevent stack garbage from influencing strptime. */
2567 if (check_end (strptime (time_string, time_formats[i], &t)))
2574 /* Restore the previous locale. */
2575 setlocale (LC_TIME, oldlocale);
2580 /* Authorization support: We support three authorization schemes:
2582 * `Basic' scheme, consisting of base64-ing USER:PASSWORD string;
2584 * `Digest' scheme, added by Junio Hamano <junio@twinsun.com>,
2585 consisting of answering to the server's challenge with the proper
2588 * `NTLM' ("NT Lan Manager") scheme, based on code written by Daniel
2589 Stenberg for libcurl. Like digest, NTLM is based on a
2590 challenge-response mechanism, but unlike digest, it is non-standard
2591 (authenticates TCP connections rather than requests), undocumented
2592 and Microsoft-specific. */
2594 /* Create the authentication header contents for the `Basic' scheme.
2595 This is done by encoding the string "USER:PASS" to base64 and
2596 prepending the string "Basic " in front of it. */
2599 basic_authentication_encode (const char *user, const char *passwd)
2602 int len1 = strlen (user) + 1 + strlen (passwd);
2604 t1 = (char *)alloca (len1 + 1);
2605 sprintf (t1, "%s:%s", user, passwd);
2607 t2 = (char *)alloca (BASE64_LENGTH (len1) + 1);
2608 base64_encode (t1, len1, t2);
2610 return concat_strings ("Basic ", t2, (char *) 0);
2613 #define SKIP_WS(x) do { \
2614 while (ISSPACE (*(x))) \
2618 #ifdef ENABLE_DIGEST
2619 /* Parse HTTP `WWW-Authenticate:' header. AU points to the beginning
2620 of a field in such a header. If the field is the one specified by
2621 ATTR_NAME ("realm", "opaque", and "nonce" are used by the current
2622 digest authorization code), extract its value in the (char*)
2623 variable pointed by RET. Returns negative on a malformed header,
2624 or number of bytes that have been parsed by this call. */
2626 extract_header_attr (const char *au, const char *attr_name, char **ret)
2629 const char *cp = au;
2631 if (strncmp (cp, attr_name, strlen (attr_name)) == 0)
2633 cp += strlen (attr_name);
2646 for (ep = cp; *ep && *ep != '\"'; ep++)
2651 *ret = strdupdelim (cp, ep);
2658 /* Dump the hexadecimal representation of HASH to BUF. HASH should be
2659 an array of 16 bytes containing the hash keys, and BUF should be a
2660 buffer of 33 writable characters (32 for hex digits plus one for
2661 zero termination). */
2663 dump_hash (char *buf, const unsigned char *hash)
2667 for (i = 0; i < MD5_HASHLEN; i++, hash++)
2669 *buf++ = XNUM_TO_digit (*hash >> 4);
2670 *buf++ = XNUM_TO_digit (*hash & 0xf);
2675 /* Take the line apart to find the challenge, and compose a digest
2676 authorization header. See RFC2069 section 2.1.2. */
2678 digest_authentication_encode (const char *au, const char *user,
2679 const char *passwd, const char *method,
2682 static char *realm, *opaque, *nonce;
2687 { "realm", &realm },
2688 { "opaque", &opaque },
2693 realm = opaque = nonce = NULL;
2695 au += 6; /* skip over `Digest' */
2701 for (i = 0; i < countof (options); i++)
2703 int skip = extract_header_attr (au, options[i].name,
2704 options[i].variable);
2708 xfree_null (opaque);
2718 if (i == countof (options))
2720 while (*au && *au != '=')
2728 while (*au && *au != '\"')
2735 while (*au && *au != ',')
2740 if (!realm || !nonce || !user || !passwd || !path || !method)
2743 xfree_null (opaque);
2748 /* Calculate the digest value. */
2750 ALLOCA_MD5_CONTEXT (ctx);
2751 unsigned char hash[MD5_HASHLEN];
2752 char a1buf[MD5_HASHLEN * 2 + 1], a2buf[MD5_HASHLEN * 2 + 1];
2753 char response_digest[MD5_HASHLEN * 2 + 1];
2755 /* A1BUF = H(user ":" realm ":" password) */
2757 gen_md5_update ((unsigned char *)user, strlen (user), ctx);
2758 gen_md5_update ((unsigned char *)":", 1, ctx);
2759 gen_md5_update ((unsigned char *)realm, strlen (realm), ctx);
2760 gen_md5_update ((unsigned char *)":", 1, ctx);
2761 gen_md5_update ((unsigned char *)passwd, strlen (passwd), ctx);
2762 gen_md5_finish (ctx, hash);
2763 dump_hash (a1buf, hash);
2765 /* A2BUF = H(method ":" path) */
2767 gen_md5_update ((unsigned char *)method, strlen (method), ctx);
2768 gen_md5_update ((unsigned char *)":", 1, ctx);
2769 gen_md5_update ((unsigned char *)path, strlen (path), ctx);
2770 gen_md5_finish (ctx, hash);
2771 dump_hash (a2buf, hash);
2773 /* RESPONSE_DIGEST = H(A1BUF ":" nonce ":" A2BUF) */
2775 gen_md5_update ((unsigned char *)a1buf, MD5_HASHLEN * 2, ctx);
2776 gen_md5_update ((unsigned char *)":", 1, ctx);
2777 gen_md5_update ((unsigned char *)nonce, strlen (nonce), ctx);
2778 gen_md5_update ((unsigned char *)":", 1, ctx);
2779 gen_md5_update ((unsigned char *)a2buf, MD5_HASHLEN * 2, ctx);
2780 gen_md5_finish (ctx, hash);
2781 dump_hash (response_digest, hash);
2783 res = xmalloc (strlen (user)
2788 + 2 * MD5_HASHLEN /*strlen (response_digest)*/
2789 + (opaque ? strlen (opaque) : 0)
2791 sprintf (res, "Digest \
2792 username=\"%s\", realm=\"%s\", nonce=\"%s\", uri=\"%s\", response=\"%s\"",
2793 user, realm, nonce, path, response_digest);
2796 char *p = res + strlen (res);
2797 strcat (p, ", opaque=\"");
2804 #endif /* ENABLE_DIGEST */
2806 /* Computing the size of a string literal must take into account that
2807 value returned by sizeof includes the terminating \0. */
2808 #define STRSIZE(literal) (sizeof (literal) - 1)
2810 /* Whether chars in [b, e) begin with the literal string provided as
2811 first argument and are followed by whitespace or terminating \0.
2812 The comparison is case-insensitive. */
2813 #define STARTS(literal, b, e) \
2814 ((e) - (b) >= STRSIZE (literal) \
2815 && 0 == strncasecmp (b, literal, STRSIZE (literal)) \
2816 && ((e) - (b) == STRSIZE (literal) \
2817 || ISSPACE (b[STRSIZE (literal)])))
2820 known_authentication_scheme_p (const char *hdrbeg, const char *hdrend)
2822 return STARTS ("Basic", hdrbeg, hdrend)
2823 #ifdef ENABLE_DIGEST
2824 || STARTS ("Digest", hdrbeg, hdrend)
2827 || STARTS ("NTLM", hdrbeg, hdrend)
2834 /* Create the HTTP authorization request header. When the
2835 `WWW-Authenticate' response header is seen, according to the
2836 authorization scheme specified in that header (`Basic' and `Digest'
2837 are supported by the current implementation), produce an
2838 appropriate HTTP authorization request header. */
2840 create_authorization_line (const char *au, const char *user,
2841 const char *passwd, const char *method,
2842 const char *path, bool *finished)
2844 /* We are called only with known schemes, so we can dispatch on the
2846 switch (TOUPPER (*au))
2848 case 'B': /* Basic */
2850 return basic_authentication_encode (user, passwd);
2851 #ifdef ENABLE_DIGEST
2852 case 'D': /* Digest */
2854 return digest_authentication_encode (au, user, passwd, method, path);
2857 case 'N': /* NTLM */
2858 if (!ntlm_input (&pconn.ntlm, au))
2863 return ntlm_output (&pconn.ntlm, user, passwd, finished);
2866 /* We shouldn't get here -- this function should be only called
2867 with values approved by known_authentication_scheme_p. */
2875 if (!wget_cookie_jar)
2876 wget_cookie_jar = cookie_jar_new ();
2877 if (opt.cookies_input && !cookies_loaded_p)
2879 cookie_jar_load (wget_cookie_jar, opt.cookies_input);
2880 cookies_loaded_p = true;
2887 if (wget_cookie_jar)
2888 cookie_jar_save (wget_cookie_jar, opt.cookies_output);
2894 xfree_null (pconn.host);
2895 if (wget_cookie_jar)
2896 cookie_jar_delete (wget_cookie_jar);