2 Copyright (C) 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
18 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, 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. */
34 #include <sys/types.h>
45 #if TIME_WITH_SYS_TIME
46 # include <sys/time.h>
50 # include <sys/time.h>
67 # include "gen_sslfunc.h"
75 extern char *version_string;
76 extern LARGE_INT total_downloaded_bytes;
78 extern FILE *output_stream;
79 extern int output_stream_regular;
82 # define MIN(x, y) ((x) > (y) ? (y) : (x))
86 static int cookies_loaded_p;
87 struct cookie_jar *wget_cookie_jar;
89 #define TEXTHTML_S "text/html"
90 #define TEXTXHTML_S "application/xhtml+xml"
92 /* Some status code validation macros: */
93 #define H_20X(x) (((x) >= 200) && ((x) < 300))
94 #define H_PARTIAL(x) ((x) == HTTP_STATUS_PARTIAL_CONTENTS)
95 #define H_REDIRECTED(x) ((x) == HTTP_STATUS_MOVED_PERMANENTLY \
96 || (x) == HTTP_STATUS_MOVED_TEMPORARILY \
97 || (x) == HTTP_STATUS_SEE_OTHER \
98 || (x) == HTTP_STATUS_TEMPORARY_REDIRECT)
100 /* HTTP/1.0 status codes from RFC1945, provided for reference. */
101 /* Successful 2xx. */
102 #define HTTP_STATUS_OK 200
103 #define HTTP_STATUS_CREATED 201
104 #define HTTP_STATUS_ACCEPTED 202
105 #define HTTP_STATUS_NO_CONTENT 204
106 #define HTTP_STATUS_PARTIAL_CONTENTS 206
108 /* Redirection 3xx. */
109 #define HTTP_STATUS_MULTIPLE_CHOICES 300
110 #define HTTP_STATUS_MOVED_PERMANENTLY 301
111 #define HTTP_STATUS_MOVED_TEMPORARILY 302
112 #define HTTP_STATUS_SEE_OTHER 303 /* from HTTP/1.1 */
113 #define HTTP_STATUS_NOT_MODIFIED 304
114 #define HTTP_STATUS_TEMPORARY_REDIRECT 307 /* from HTTP/1.1 */
116 /* Client error 4xx. */
117 #define HTTP_STATUS_BAD_REQUEST 400
118 #define HTTP_STATUS_UNAUTHORIZED 401
119 #define HTTP_STATUS_FORBIDDEN 403
120 #define HTTP_STATUS_NOT_FOUND 404
121 #define HTTP_STATUS_RANGE_NOT_SATISFIABLE 416
123 /* Server errors 5xx. */
124 #define HTTP_STATUS_INTERNAL 500
125 #define HTTP_STATUS_NOT_IMPLEMENTED 501
126 #define HTTP_STATUS_BAD_GATEWAY 502
127 #define HTTP_STATUS_UNAVAILABLE 503
130 rel_none, rel_name, rel_value, rel_both
137 struct request_header {
139 enum rp release_policy;
141 int hcount, hcapacity;
144 /* Create a new, empty request. At least request_set_method must be
145 called before the request can be used. */
147 static struct request *
150 struct request *req = xnew0 (struct request);
152 req->headers = xnew_array (struct request_header, req->hcapacity);
156 /* Set the request's method and its arguments. METH should be a
157 literal string (or it should outlive the request) because it will
158 not be freed. ARG will be freed by request_free. */
161 request_set_method (struct request *req, const char *meth, char *arg)
167 /* Return the method string passed with the last call to
168 request_set_method. */
171 request_method (const struct request *req)
176 /* Free one header according to the release policy specified with
177 request_set_header. */
180 release_header (struct request_header *hdr)
182 switch (hdr->release_policy)
199 /* Set the request named NAME to VALUE. Specifically, this means that
200 a "NAME: VALUE\r\n" header line will be used in the request. If a
201 header with the same name previously existed in the request, its
202 value will be replaced by this one.
204 RELEASE_POLICY determines whether NAME and VALUE should be released
205 (freed) with request_free. Allowed values are:
207 - rel_none - don't free NAME or VALUE
208 - rel_name - free NAME when done
209 - rel_value - free VALUE when done
210 - rel_both - free both NAME and VALUE when done
212 Setting release policy is useful when arguments come from different
213 sources. For example:
215 // Don't free literal strings!
216 request_set_header (req, "Pragma", "no-cache", rel_none);
218 // Don't free a global variable, we'll need it later.
219 request_set_header (req, "Referer", opt.referer, rel_none);
221 // Value freshly allocated, free it when done.
222 request_set_header (req, "Range",
223 aprintf ("bytes=%s-", number_to_static_string (hs->restval)),
228 request_set_header (struct request *req, char *name, char *value,
229 enum rp release_policy)
231 struct request_header *hdr;
235 for (i = 0; i < req->hcount; i++)
237 hdr = &req->headers[i];
238 if (0 == strcasecmp (name, hdr->name))
240 /* Replace existing header. */
241 release_header (hdr);
244 hdr->release_policy = release_policy;
249 /* Install new header. */
251 if (req->hcount >= req->hcount)
253 req->hcapacity <<= 1;
254 req->headers = xrealloc (req->headers,
255 req->hcapacity * sizeof (struct request_header));
257 hdr = &req->headers[req->hcount++];
260 hdr->release_policy = release_policy;
263 /* Like request_set_header, but sets the whole header line, as
264 provided by the user using the `--header' option. For example,
265 request_set_user_header (req, "Foo: bar") works just like
266 request_set_header (req, "Foo", "bar"). */
269 request_set_user_header (struct request *req, const char *header)
272 const char *p = strchr (header, ':');
275 BOUNDED_TO_ALLOCA (header, p, name);
279 request_set_header (req, xstrdup (name), (char *) p, rel_name);
282 #define APPEND(p, str) do { \
283 int A_len = strlen (str); \
284 memcpy (p, str, A_len); \
288 /* Construct the request and write it to FD using fd_write. */
291 request_send (const struct request *req, int fd)
293 char *request_string, *p;
294 int i, size, write_error;
296 /* Count the request size. */
299 /* METHOD " " ARG " " "HTTP/1.0" "\r\n" */
300 size += strlen (req->method) + 1 + strlen (req->arg) + 1 + 8 + 2;
302 for (i = 0; i < req->hcount; i++)
304 struct request_header *hdr = &req->headers[i];
305 /* NAME ": " VALUE "\r\n" */
306 size += strlen (hdr->name) + 2 + strlen (hdr->value) + 2;
312 p = request_string = alloca_array (char, size);
314 /* Generate the request. */
316 APPEND (p, req->method); *p++ = ' ';
317 APPEND (p, req->arg); *p++ = ' ';
318 memcpy (p, "HTTP/1.0\r\n", 10); p += 10;
320 for (i = 0; i < req->hcount; i++)
322 struct request_header *hdr = &req->headers[i];
323 APPEND (p, hdr->name);
324 *p++ = ':', *p++ = ' ';
325 APPEND (p, hdr->value);
326 *p++ = '\r', *p++ = '\n';
329 *p++ = '\r', *p++ = '\n', *p++ = '\0';
330 assert (p - request_string == size);
334 DEBUGP (("\n---request begin---\n%s---request end---\n", request_string));
336 /* Send the request to the server. */
338 write_error = fd_write (fd, request_string, size - 1, -1);
340 logprintf (LOG_VERBOSE, _("Failed writing HTTP request: %s.\n"),
345 /* Release the resources used by REQ. */
348 request_free (struct request *req)
351 xfree_null (req->arg);
352 for (i = 0; i < req->hcount; i++)
353 release_header (&req->headers[i]);
354 xfree_null (req->headers);
358 /* Send the contents of FILE_NAME to SOCK/SSL. Make sure that exactly
359 PROMISED_SIZE bytes are sent over the wire -- if the file is
360 longer, read only that much; if the file is shorter, report an error. */
363 post_file (int sock, const char *file_name, wgint promised_size)
365 static char chunk[8192];
370 DEBUGP (("[writing POST file %s ... ", file_name));
372 fp = fopen (file_name, "rb");
375 while (!feof (fp) && written < promised_size)
378 int length = fread (chunk, 1, sizeof (chunk), fp);
381 towrite = MIN (promised_size - written, length);
382 write_error = fd_write (sock, chunk, towrite, -1);
392 /* If we've written less than was promised, report a (probably
393 nonsensical) error rather than break the promise. */
394 if (written < promised_size)
400 assert (written == promised_size);
401 DEBUGP (("done]\n"));
406 response_head_terminator (const char *hunk, int oldlen, int peeklen)
408 const char *start, *end;
410 /* If at first peek, verify whether HUNK starts with "HTTP". If
411 not, this is a HTTP/0.9 request and we must bail out without
413 if (oldlen == 0 && 0 != memcmp (hunk, "HTTP", MIN (peeklen, 4)))
419 start = hunk + oldlen - 4;
420 end = hunk + oldlen + peeklen;
422 for (; start < end - 1; start++)
429 if (start[1] == '\n')
435 /* Read the HTTP request head from FD and return it. The error
436 conditions are the same as with fd_read_hunk.
438 To support HTTP/0.9 responses, this function tries to make sure
439 that the data begins with "HTTP". If this is not the case, no data
440 is read and an empty request is returned, so that the remaining
441 data can be treated as body. */
444 read_http_response_head (int fd)
446 return fd_read_hunk (fd, response_head_terminator, 512);
450 /* The response data. */
453 /* The array of pointers that indicate where each header starts.
454 For example, given this HTTP response:
461 The headers are located like this:
463 "HTTP/1.0 200 Ok\r\nDescription: some\r\n text\r\nEtag: x\r\n\r\n"
465 headers[0] headers[1] headers[2] headers[3]
467 I.e. headers[0] points to the beginning of the request,
468 headers[1] points to the end of the first header and the
469 beginning of the second one, etc. */
471 const char **headers;
474 /* Create a new response object from the text of the HTTP response,
475 available in HEAD. That text is automatically split into
476 constituent header lines for fast retrieval using
479 static struct response *
480 resp_new (const char *head)
485 struct response *resp = xnew0 (struct response);
490 /* Empty head means that we're dealing with a headerless
491 (HTTP/0.9) response. In that case, don't set HEADERS at
496 /* Split HEAD into header lines, so that resp_header_* functions
497 don't need to do this over and over again. */
503 DO_REALLOC (resp->headers, size, count + 1, const char *);
504 resp->headers[count++] = hdr;
506 /* Break upon encountering an empty line. */
507 if (!hdr[0] || (hdr[0] == '\r' && hdr[1] == '\n') || hdr[0] == '\n')
510 /* Find the end of HDR, including continuations. */
513 const char *end = strchr (hdr, '\n');
519 while (*hdr == ' ' || *hdr == '\t');
521 DO_REALLOC (resp->headers, size, count + 1, const char *);
522 resp->headers[count] = NULL;
527 /* Locate the header named NAME in the request data, starting with
528 position START. This allows the code to loop through the request
529 data, filtering for all requests of a given name. Returns the
530 found position, or -1 for failure. The code that uses this
531 function typically looks like this:
533 for (pos = 0; (pos = resp_header_locate (...)) != -1; pos++)
534 ... do something with header ...
536 If you only care about one header, use resp_header_get instead of
540 resp_header_locate (const struct response *resp, const char *name, int start,
541 const char **begptr, const char **endptr)
544 const char **headers = resp->headers;
547 if (!headers || !headers[1])
550 name_len = strlen (name);
556 for (; headers[i + 1]; i++)
558 const char *b = headers[i];
559 const char *e = headers[i + 1];
561 && b[name_len] == ':'
562 && 0 == strncasecmp (b, name, name_len))
565 while (b < e && ISSPACE (*b))
567 while (b < e && ISSPACE (e[-1]))
577 /* Find and retrieve the header named NAME in the request data. If
578 found, set *BEGPTR to its starting, and *ENDPTR to its ending
579 position, and return 1. Otherwise return 0.
581 This function is used as a building block for resp_header_copy
582 and resp_header_strdup. */
585 resp_header_get (const struct response *resp, const char *name,
586 const char **begptr, const char **endptr)
588 int pos = resp_header_locate (resp, name, 0, begptr, endptr);
592 /* Copy the response header named NAME to buffer BUF, no longer than
593 BUFSIZE (BUFSIZE includes the terminating 0). If the header
594 exists, 1 is returned, otherwise 0. If there should be no limit on
595 the size of the header, use resp_header_strdup instead.
597 If BUFSIZE is 0, no data is copied, but the boolean indication of
598 whether the header is present is still returned. */
601 resp_header_copy (const struct response *resp, const char *name,
602 char *buf, int bufsize)
605 if (!resp_header_get (resp, name, &b, &e))
609 int len = MIN (e - b, bufsize - 1);
610 memcpy (buf, b, len);
616 /* Return the value of header named NAME in RESP, allocated with
617 malloc. If such a header does not exist in RESP, return NULL. */
620 resp_header_strdup (const struct response *resp, const char *name)
623 if (!resp_header_get (resp, name, &b, &e))
625 return strdupdelim (b, e);
628 /* Parse the HTTP status line, which is of format:
630 HTTP-Version SP Status-Code SP Reason-Phrase
632 The function returns the status-code, or -1 if the status line
633 appears malformed. The pointer to "reason-phrase" message is
634 returned in *MESSAGE. */
637 resp_status (const struct response *resp, char **message)
644 /* For a HTTP/0.9 response, assume status 200. */
646 *message = xstrdup (_("No headers, assuming HTTP/0.9"));
650 p = resp->headers[0];
651 end = resp->headers[1];
657 if (end - p < 4 || 0 != strncmp (p, "HTTP", 4))
661 /* Match the HTTP version. This is optional because Gnutella
662 servers have been reported to not specify HTTP version. */
663 if (p < end && *p == '/')
666 while (p < end && ISDIGIT (*p))
668 if (p < end && *p == '.')
670 while (p < end && ISDIGIT (*p))
674 while (p < end && ISSPACE (*p))
676 if (end - p < 3 || !ISDIGIT (p[0]) || !ISDIGIT (p[1]) || !ISDIGIT (p[2]))
679 status = 100 * (p[0] - '0') + 10 * (p[1] - '0') + (p[2] - '0');
684 while (p < end && ISSPACE (*p))
686 while (p < end && ISSPACE (end[-1]))
688 *message = strdupdelim (p, end);
694 /* Release the resources used by RESP. */
697 resp_free (struct response *resp)
699 xfree_null (resp->headers);
703 /* Print [b, e) to the log, omitting the trailing CRLF. */
706 print_server_response_1 (const char *prefix, const char *b, const char *e)
709 if (b < e && e[-1] == '\n')
711 if (b < e && e[-1] == '\r')
713 BOUNDED_TO_ALLOCA (b, e, ln);
714 logprintf (LOG_VERBOSE, "%s%s\n", prefix, escnonprint (ln));
717 /* Print the server response, line by line, omitting the trailing CR
718 characters, prefixed with PREFIX. */
721 print_server_response (const struct response *resp, const char *prefix)
726 for (i = 0; resp->headers[i + 1]; i++)
727 print_server_response_1 (prefix, resp->headers[i], resp->headers[i + 1]);
730 /* Parse the `Content-Range' header and extract the information it
731 contains. Returns 1 if successful, -1 otherwise. */
733 parse_content_range (const char *hdr, wgint *first_byte_ptr,
734 wgint *last_byte_ptr, wgint *entity_length_ptr)
738 /* Ancient versions of Netscape proxy server, presumably predating
739 rfc2068, sent out `Content-Range' without the "bytes"
741 if (!strncasecmp (hdr, "bytes", 5))
744 /* "JavaWebServer/1.1.1" sends "bytes: x-y/z", contrary to the
748 while (ISSPACE (*hdr))
755 for (num = 0; ISDIGIT (*hdr); hdr++)
756 num = 10 * num + (*hdr - '0');
757 if (*hdr != '-' || !ISDIGIT (*(hdr + 1)))
759 *first_byte_ptr = num;
761 for (num = 0; ISDIGIT (*hdr); hdr++)
762 num = 10 * num + (*hdr - '0');
763 if (*hdr != '/' || !ISDIGIT (*(hdr + 1)))
765 *last_byte_ptr = num;
767 for (num = 0; ISDIGIT (*hdr); hdr++)
768 num = 10 * num + (*hdr - '0');
769 *entity_length_ptr = num;
773 /* Read the body of the request, but don't store it anywhere and don't
774 display a progress gauge. This is useful for reading the error
775 responses whose bodies don't need to be displayed or logged, but
776 which need to be read anyway. */
779 skip_short_body (int fd, wgint contlen)
781 /* Skipping the body doesn't make sense if the content length is
782 unknown because, in that case, persistent connections cannot be
783 used. (#### This is not the case with HTTP/1.1 where they can
784 still be used with the magic of the "chunked" transfer!) */
787 DEBUGP (("Skipping %s bytes of body data... ", number_to_static_string (contlen)));
792 int ret = fd_read (fd, dlbuf, MIN (contlen, sizeof (dlbuf)), -1);
797 DEBUGP (("done.\n"));
800 /* Persistent connections. Currently, we cache the most recently used
801 connection as persistent, provided that the HTTP server agrees to
802 make it such. The persistence data is stored in the variables
803 below. Ideally, it should be possible to cache an arbitrary fixed
804 number of these connections. */
806 /* Whether a persistent connection is active. */
807 static int pconn_active;
810 /* The socket of the connection. */
813 /* Host and port of the currently active persistent connection. */
817 /* Whether a ssl handshake has occoured on this connection. */
821 /* Mark the persistent connection as invalid and free the resources it
822 uses. This is used by the CLOSE_* macros after they forcefully
823 close a registered persistent connection. */
826 invalidate_persistent (void)
828 DEBUGP (("Disabling further reuse of socket %d.\n", pconn.socket));
830 fd_close (pconn.socket);
835 /* Register FD, which should be a TCP/IP connection to HOST:PORT, as
836 persistent. This will enable someone to use the same connection
837 later. In the context of HTTP, this must be called only AFTER the
838 response has been received and the server has promised that the
839 connection will remain alive.
841 If a previous connection was persistent, it is closed. */
844 register_persistent (const char *host, int port, int fd, int ssl)
848 if (pconn.socket == fd)
850 /* The connection FD is already registered. */
855 /* The old persistent connection is still active; close it
856 first. This situation arises whenever a persistent
857 connection exists, but we then connect to a different
858 host, and try to register a persistent connection to that
860 invalidate_persistent ();
866 pconn.host = xstrdup (host);
870 DEBUGP (("Registered socket %d for persistent reuse.\n", fd));
873 /* Return non-zero if a persistent connection is available for
874 connecting to HOST:PORT. */
877 persistent_available_p (const char *host, int port, int ssl,
878 int *host_lookup_failed)
880 /* First, check whether a persistent connection is active at all. */
884 /* If we want SSL and the last connection wasn't or vice versa,
885 don't use it. Checking for host and port is not enough because
886 HTTP and HTTPS can apparently coexist on the same port. */
887 if (ssl != pconn.ssl)
890 /* If we're not connecting to the same port, we're not interested. */
891 if (port != pconn.port)
894 /* If the host is the same, we're in business. If not, there is
895 still hope -- read below. */
896 if (0 != strcasecmp (host, pconn.host))
898 /* If pconn.socket is already talking to HOST, we needn't
899 reconnect. This happens often when both sites are virtual
900 hosts distinguished only by name and served by the same
901 network interface, and hence the same web server (possibly
902 set up by the ISP and serving many different web sites).
903 This admittedly non-standard optimization does not contradict
904 HTTP and works well with popular server software. */
908 struct address_list *al;
911 /* Don't try to talk to two different SSL sites over the same
912 secure connection! (Besides, it's not clear if name-based
913 virtual hosting is even possible with SSL.) */
916 /* If pconn.socket's peer is one of the IP addresses HOST
917 resolves to, pconn.socket is for all intents and purposes
918 already talking to HOST. */
920 if (!socket_ip_address (pconn.socket, &ip, ENDPOINT_PEER))
922 /* Can't get the peer's address -- something must be very
923 wrong with the connection. */
924 invalidate_persistent ();
927 al = lookup_host (host, 0);
930 *host_lookup_failed = 1;
934 found = address_list_contains (al, &ip);
935 address_list_release (al);
940 /* The persistent connection's peer address was found among the
941 addresses HOST resolved to; therefore, pconn.sock is in fact
942 already talking to HOST -- no need to reconnect. */
945 /* Finally, check whether the connection is still open. This is
946 important because most server implement a liberal (short) timeout
947 on persistent connections. Wget can of course always reconnect
948 if the connection doesn't work out, but it's nicer to know in
949 advance. This test is a logical followup of the first test, but
950 is "expensive" and therefore placed at the end of the list. */
952 if (!test_socket_open (pconn.socket))
954 /* Oops, the socket is no longer open. Now that we know that,
955 let's invalidate the persistent connection before returning
957 invalidate_persistent ();
964 /* The idea behind these two CLOSE macros is to distinguish between
965 two cases: one when the job we've been doing is finished, and we
966 want to close the connection and leave, and two when something is
967 seriously wrong and we're closing the connection as part of
970 In case of keep_alive, CLOSE_FINISH should leave the connection
971 open, while CLOSE_INVALIDATE should still close it.
973 Note that the semantics of the flag `keep_alive' is "this
974 connection *will* be reused (the server has promised not to close
975 the connection once we're done)", while the semantics of
976 `pc_active_p && (fd) == pc_last_fd' is "we're *now* using an
977 active, registered connection". */
979 #define CLOSE_FINISH(fd) do { \
982 if (pconn_active && (fd) == pconn.socket) \
983 invalidate_persistent (); \
992 #define CLOSE_INVALIDATE(fd) do { \
993 if (pconn_active && (fd) == pconn.socket) \
994 invalidate_persistent (); \
1002 wgint len; /* received length */
1003 wgint contlen; /* expected length */
1004 wgint restval; /* the restart value */
1005 int res; /* the result of last read */
1006 char *newloc; /* new location (redirection) */
1007 char *remote_time; /* remote time-stamp string */
1008 char *error; /* textual HTTP error */
1009 int statcode; /* status code */
1010 wgint rd_size; /* amount of data read from socket */
1011 double dltime; /* time it took to download the data */
1012 const char *referer; /* value of the referer header. */
1013 char **local_file; /* local file. */
1017 free_hstat (struct http_stat *hs)
1019 xfree_null (hs->newloc);
1020 xfree_null (hs->remote_time);
1021 xfree_null (hs->error);
1023 /* Guard against being called twice. */
1025 hs->remote_time = NULL;
1029 static char *create_authorization_line PARAMS ((const char *, const char *,
1030 const char *, const char *,
1032 static char *basic_authentication_encode PARAMS ((const char *, const char *));
1033 static int known_authentication_scheme_p PARAMS ((const char *));
1035 time_t http_atotm PARAMS ((const char *));
1037 #define BEGINS_WITH(line, string_constant) \
1038 (!strncasecmp (line, string_constant, sizeof (string_constant) - 1) \
1039 && (ISSPACE (line[sizeof (string_constant) - 1]) \
1040 || !line[sizeof (string_constant) - 1]))
1042 /* Retrieve a document through HTTP protocol. It recognizes status
1043 code, and correctly handles redirections. It closes the network
1044 socket. If it receives an error from the functions below it, it
1045 will print it if there is enough information to do so (almost
1046 always), returning the error to the caller (i.e. http_loop).
1048 Various HTTP parameters are stored to hs.
1050 If PROXY is non-NULL, the connection will be made to the proxy
1051 server, and u->url will be requested. */
1053 gethttp (struct url *u, struct http_stat *hs, int *dt, struct url *proxy)
1055 struct request *req;
1058 char *user, *passwd;
1062 wgint contlen, contrange;
1069 /* Whether authorization has been already tried. */
1070 int auth_tried_already;
1072 /* Whether our connection to the remote host is through SSL. */
1076 struct response *resp;
1080 /* Whether this connection will be kept alive after the HTTP request
1084 /* Whether keep-alive should be inhibited. */
1085 int inhibit_keep_alive = !opt.http_keep_alive || opt.ignore_length;
1087 /* Headers sent when using POST. */
1088 wgint post_data_size = 0;
1090 int host_lookup_failed = 0;
1093 if (u->scheme == SCHEME_HTTPS)
1095 /* Initialize the SSL context. After this has once been done,
1096 it becomes a no-op. */
1097 switch (ssl_init ())
1099 case SSLERRCTXCREATE:
1101 logprintf (LOG_NOTQUIET, _("Failed to set up an SSL context\n"));
1102 return SSLERRCTXCREATE;
1103 case SSLERRCERTFILE:
1104 /* try without certfile */
1105 logprintf (LOG_NOTQUIET,
1106 _("Failed to load certificates from %s\n"),
1108 logprintf (LOG_NOTQUIET,
1109 _("Trying without the specified certificate\n"));
1112 logprintf (LOG_NOTQUIET,
1113 _("Failed to get certificate key from %s\n"),
1115 logprintf (LOG_NOTQUIET,
1116 _("Trying without the specified certificate\n"));
1122 #endif /* HAVE_SSL */
1124 if (!(*dt & HEAD_ONLY))
1125 /* If we're doing a GET on the URL, as opposed to just a HEAD, we need to
1126 know the local filename so we can save to it. */
1127 assert (*hs->local_file != NULL);
1129 auth_tried_already = 0;
1131 /* Initialize certain elements of struct http_stat. */
1136 hs->remote_time = NULL;
1141 /* Prepare the request to send. */
1143 req = request_new ();
1145 const char *meth = "GET";
1146 if (*dt & HEAD_ONLY)
1148 else if (opt.post_file_name || opt.post_data)
1150 /* Use the full path, i.e. one that includes the leading slash and
1151 the query string. E.g. if u->path is "foo/bar" and u->query is
1152 "param=value", full_path will be "/foo/bar?param=value". */
1153 request_set_method (req, meth,
1154 proxy ? xstrdup (u->url) : url_full_path (u));
1157 request_set_header (req, "Referer", (char *) hs->referer, rel_none);
1158 if (*dt & SEND_NOCACHE)
1159 request_set_header (req, "Pragma", "no-cache", rel_none);
1161 request_set_header (req, "Range",
1162 aprintf ("bytes=%s-",
1163 number_to_static_string (hs->restval)),
1166 request_set_header (req, "User-Agent", opt.useragent, rel_none);
1168 request_set_header (req, "User-Agent",
1169 aprintf ("Wget/%s", version_string), rel_value);
1170 request_set_header (req, "Accept", "*/*", rel_none);
1172 /* Find the username and password for authentication. */
1175 search_netrc (u->host, (const char **)&user, (const char **)&passwd, 0);
1176 user = user ? user : opt.http_user;
1177 passwd = passwd ? passwd : opt.http_passwd;
1181 /* We have the username and the password, but haven't tried
1182 any authorization yet. Let's see if the "Basic" method
1183 works. If not, we'll come back here and construct a
1184 proper authorization method with the right challenges.
1186 If we didn't employ this kind of logic, every URL that
1187 requires authorization would have to be processed twice,
1188 which is very suboptimal and generates a bunch of false
1189 "unauthorized" errors in the server log.
1191 #### But this logic also has a serious problem when used
1192 with stronger authentications: we *first* transmit the
1193 username and the password in clear text, and *then* attempt a
1194 stronger authentication scheme. That cannot be right! We
1195 are only fortunate that almost everyone still uses the
1196 `Basic' scheme anyway.
1198 There should be an option to prevent this from happening, for
1199 those who use strong authentication schemes and value their
1201 request_set_header (req, "Authorization",
1202 basic_authentication_encode (user, passwd),
1209 char *proxy_user, *proxy_passwd;
1210 /* For normal username and password, URL components override
1211 command-line/wgetrc parameters. With proxy
1212 authentication, it's the reverse, because proxy URLs are
1213 normally the "permanent" ones, so command-line args
1214 should take precedence. */
1215 if (opt.proxy_user && opt.proxy_passwd)
1217 proxy_user = opt.proxy_user;
1218 proxy_passwd = opt.proxy_passwd;
1222 proxy_user = proxy->user;
1223 proxy_passwd = proxy->passwd;
1225 /* #### This does not appear right. Can't the proxy request,
1226 say, `Digest' authentication? */
1227 if (proxy_user && proxy_passwd)
1228 proxyauth = basic_authentication_encode (proxy_user, proxy_passwd);
1230 /* If we're using a proxy, we will be connecting to the proxy
1234 /* Proxy authorization over SSL is handled below. */
1236 if (u->scheme != SCHEME_HTTPS)
1238 request_set_header (req, "Proxy-Authorization", proxyauth, rel_value);
1242 /* Whether we need to print the host header with braces around
1243 host, e.g. "Host: [3ffe:8100:200:2::2]:1234" instead of the
1244 usual "Host: symbolic-name:1234". */
1245 int squares = strchr (u->host, ':') != NULL;
1246 if (u->port == scheme_default_port (u->scheme))
1247 request_set_header (req, "Host",
1248 aprintf (squares ? "[%s]" : "%s", u->host),
1251 request_set_header (req, "Host",
1252 aprintf (squares ? "[%s]:%d" : "%s:%d",
1257 if (!inhibit_keep_alive)
1258 request_set_header (req, "Connection", "Keep-Alive", rel_none);
1261 request_set_header (req, "Cookie",
1262 cookie_header (wget_cookie_jar,
1263 u->host, u->port, u->path,
1265 u->scheme == SCHEME_HTTPS
1272 if (opt.post_data || opt.post_file_name)
1274 request_set_header (req, "Content-Type",
1275 "application/x-www-form-urlencoded", rel_none);
1277 post_data_size = strlen (opt.post_data);
1280 post_data_size = file_size (opt.post_file_name);
1281 if (post_data_size == -1)
1283 logprintf (LOG_NOTQUIET, "POST data file missing: %s\n",
1284 opt.post_file_name);
1288 request_set_header (req, "Content-Length",
1289 xstrdup (number_to_static_string (post_data_size)),
1293 /* Add the user headers. */
1294 if (opt.user_headers)
1297 for (i = 0; opt.user_headers[i]; i++)
1298 request_set_user_header (req, opt.user_headers[i]);
1302 /* We need to come back here when the initial attempt to retrieve
1303 without authorization header fails. (Expected to happen at least
1304 for the Digest authorization scheme.) */
1308 /* Establish the connection. */
1310 if (!inhibit_keep_alive)
1312 /* Look for a persistent connection to target host, unless a
1313 proxy is used. The exception is when SSL is in use, in which
1314 case the proxy is nothing but a passthrough to the target
1315 host, registered as a connection to the latter. */
1316 struct url *relevant = conn;
1318 if (u->scheme == SCHEME_HTTPS)
1322 if (persistent_available_p (relevant->host, relevant->port,
1324 relevant->scheme == SCHEME_HTTPS,
1328 &host_lookup_failed))
1330 sock = pconn.socket;
1331 using_ssl = pconn.ssl;
1332 logprintf (LOG_VERBOSE, _("Reusing existing connection to %s:%d.\n"),
1333 escnonprint (pconn.host), pconn.port);
1334 DEBUGP (("Reusing fd %d.\n", sock));
1340 /* In its current implementation, persistent_available_p will
1341 look up conn->host in some cases. If that lookup failed, we
1342 don't need to bother with connect_to_host. */
1343 if (host_lookup_failed)
1346 sock = connect_to_host (conn->host, conn->port);
1350 return (retryable_socket_connect_error (errno)
1351 ? CONERROR : CONIMPOSSIBLE);
1354 if (proxy && u->scheme == SCHEME_HTTPS)
1356 /* When requesting SSL URLs through proxies, use the
1357 CONNECT method to request passthrough. */
1358 struct request *connreq = request_new ();
1359 request_set_method (connreq, "CONNECT",
1360 aprintf ("%s:%d", u->host, u->port));
1363 request_set_header (connreq, "Proxy-Authorization",
1364 proxyauth, rel_value);
1365 /* Now that PROXYAUTH is part of the CONNECT request,
1366 zero it out so we don't send proxy authorization with
1367 the regular request below. */
1371 write_error = request_send (connreq, sock);
1372 request_free (connreq);
1373 if (write_error < 0)
1375 logprintf (LOG_VERBOSE, _("Failed writing to proxy: %s.\n"),
1377 CLOSE_INVALIDATE (sock);
1381 head = read_http_response_head (sock);
1384 logprintf (LOG_VERBOSE, _("Failed reading proxy response: %s\n"),
1386 CLOSE_INVALIDATE (sock);
1395 DEBUGP (("proxy responded with: [%s]\n", head));
1397 resp = resp_new (head);
1398 statcode = resp_status (resp, &message);
1400 if (statcode != 200)
1403 logprintf (LOG_NOTQUIET, _("Proxy tunneling failed: %s"),
1404 message ? escnonprint (message) : "?");
1405 xfree_null (message);
1408 xfree_null (message);
1410 /* SOCK is now *really* connected to u->host, so update CONN
1411 to reflect this. That way register_persistent will
1412 register SOCK as being connected to u->host:u->port. */
1416 if (conn->scheme == SCHEME_HTTPS)
1418 if (!ssl_connect (sock))
1425 #endif /* HAVE_SSL */
1428 /* Send the request to server. */
1429 write_error = request_send (req, sock);
1431 if (write_error >= 0)
1435 DEBUGP (("[POST data: %s]\n", opt.post_data));
1436 write_error = fd_write (sock, opt.post_data, post_data_size, -1);
1438 else if (opt.post_file_name && post_data_size != 0)
1439 write_error = post_file (sock, opt.post_file_name, post_data_size);
1442 if (write_error < 0)
1444 logprintf (LOG_VERBOSE, _("Failed writing HTTP request: %s.\n"),
1446 CLOSE_INVALIDATE (sock);
1450 logprintf (LOG_VERBOSE, _("%s request sent, awaiting response... "),
1451 proxy ? "Proxy" : "HTTP");
1456 head = read_http_response_head (sock);
1461 logputs (LOG_NOTQUIET, _("No data received.\n"));
1462 CLOSE_INVALIDATE (sock);
1468 logprintf (LOG_NOTQUIET, _("Read error (%s) in headers.\n"),
1470 CLOSE_INVALIDATE (sock);
1475 DEBUGP (("\n---response begin---\n%s---response end---\n", head));
1477 resp = resp_new (head);
1479 /* Check for status line. */
1481 statcode = resp_status (resp, &message);
1482 if (!opt.server_response)
1483 logprintf (LOG_VERBOSE, "%2d %s\n", statcode,
1484 message ? escnonprint (message) : "");
1487 logprintf (LOG_VERBOSE, "\n");
1488 print_server_response (resp, " ");
1491 if (!opt.ignore_length
1492 && resp_header_copy (resp, "Content-Length", hdrval, sizeof (hdrval)))
1496 parsed = str_to_wgint (hdrval, NULL, 10);
1497 if (parsed == WGINT_MAX && errno == ERANGE)
1499 #### If Content-Length is out of range, it most likely
1500 means that the file is larger than 2G and that we're
1501 compiled without LFS. In that case we should probably
1502 refuse to even attempt to download the file. */
1508 /* Check for keep-alive related responses. */
1509 if (!inhibit_keep_alive && contlen != -1)
1511 if (resp_header_copy (resp, "Keep-Alive", NULL, 0))
1513 else if (resp_header_copy (resp, "Connection", hdrval, sizeof (hdrval)))
1515 if (0 == strcasecmp (hdrval, "Keep-Alive"))
1520 /* The server has promised that it will not close the connection
1521 when we're done. This means that we can register it. */
1522 register_persistent (conn->host, conn->port, sock, using_ssl);
1524 if (statcode == HTTP_STATUS_UNAUTHORIZED)
1526 /* Authorization is required. */
1527 skip_short_body (sock, contlen);
1528 CLOSE_FINISH (sock);
1529 if (auth_tried_already || !(user && passwd))
1531 /* If we have tried it already, then there is not point
1533 logputs (LOG_NOTQUIET, _("Authorization failed.\n"));
1537 char *www_authenticate = resp_header_strdup (resp,
1538 "WWW-Authenticate");
1539 /* If the authentication scheme is unknown or if it's the
1540 "Basic" authentication (which we try by default), there's
1541 no sense in retrying. */
1542 if (!www_authenticate
1543 || !known_authentication_scheme_p (www_authenticate)
1544 || BEGINS_WITH (www_authenticate, "Basic"))
1546 xfree_null (www_authenticate);
1547 logputs (LOG_NOTQUIET, _("Unknown authentication scheme.\n"));
1552 auth_tried_already = 1;
1553 pth = url_full_path (u);
1554 request_set_header (req, "Authorization",
1555 create_authorization_line (www_authenticate,
1557 request_method (req),
1561 xfree (www_authenticate);
1562 goto retry_with_auth;
1570 hs->statcode = statcode;
1572 hs->error = xstrdup (_("Malformed status line"));
1574 hs->error = xstrdup (_("(no description)"));
1576 hs->error = xstrdup (message);
1578 type = resp_header_strdup (resp, "Content-Type");
1581 char *tmp = strchr (type, ';');
1584 while (tmp > type && ISSPACE (tmp[-1]))
1589 hs->newloc = resp_header_strdup (resp, "Location");
1590 hs->remote_time = resp_header_strdup (resp, "Last-Modified");
1592 /* Handle (possibly multiple instances of) the Set-Cookie header. */
1595 const char *scbeg, *scend;
1596 /* The jar should have been created by now. */
1597 assert (wget_cookie_jar != NULL);
1599 (scpos = resp_header_locate (resp, "Set-Cookie", scpos,
1600 &scbeg, &scend)) != -1;
1603 char *set_cookie = strdupdelim (scbeg, scend);
1604 cookie_handle_set_cookie (wget_cookie_jar, u->host, u->port, u->path,
1610 if (resp_header_copy (resp, "Content-Range", hdrval, sizeof (hdrval)))
1612 wgint first_byte_pos, last_byte_pos, entity_length;
1613 if (parse_content_range (hdrval, &first_byte_pos, &last_byte_pos,
1615 contrange = first_byte_pos;
1619 /* 20x responses are counted among successful by default. */
1620 if (H_20X (statcode))
1623 /* Return if redirected. */
1624 if (H_REDIRECTED (statcode) || statcode == HTTP_STATUS_MULTIPLE_CHOICES)
1626 /* RFC2068 says that in case of the 300 (multiple choices)
1627 response, the server can output a preferred URL through
1628 `Location' header; otherwise, the request should be treated
1629 like GET. So, if the location is set, it will be a
1630 redirection; otherwise, just proceed normally. */
1631 if (statcode == HTTP_STATUS_MULTIPLE_CHOICES && !hs->newloc)
1635 logprintf (LOG_VERBOSE,
1636 _("Location: %s%s\n"),
1637 hs->newloc ? escnonprint_uri (hs->newloc) : _("unspecified"),
1638 hs->newloc ? _(" [following]") : "");
1640 skip_short_body (sock, contlen);
1641 CLOSE_FINISH (sock);
1647 /* If content-type is not given, assume text/html. This is because
1648 of the multitude of broken CGI's that "forget" to generate the
1651 0 == strncasecmp (type, TEXTHTML_S, strlen (TEXTHTML_S)) ||
1652 0 == strncasecmp (type, TEXTXHTML_S, strlen (TEXTXHTML_S)))
1657 if (opt.html_extension && (*dt & TEXTHTML))
1658 /* -E / --html-extension / html_extension = on was specified, and this is a
1659 text/html file. If some case-insensitive variation on ".htm[l]" isn't
1660 already the file's suffix, tack on ".html". */
1662 char* last_period_in_local_filename = strrchr(*hs->local_file, '.');
1664 if (last_period_in_local_filename == NULL
1665 || !(0 == strcasecmp (last_period_in_local_filename, ".htm")
1666 || 0 == strcasecmp (last_period_in_local_filename, ".html")))
1668 size_t local_filename_len = strlen(*hs->local_file);
1670 *hs->local_file = xrealloc(*hs->local_file,
1671 local_filename_len + sizeof(".html"));
1672 strcpy(*hs->local_file + local_filename_len, ".html");
1674 *dt |= ADDED_HTML_EXTENSION;
1678 if (statcode == HTTP_STATUS_RANGE_NOT_SATISFIABLE)
1680 /* If `-c' is in use and the file has been fully downloaded (or
1681 the remote file has shrunk), Wget effectively requests bytes
1682 after the end of file and the server response with 416. */
1683 logputs (LOG_VERBOSE, _("\
1684 \n The file is already fully retrieved; nothing to do.\n\n"));
1685 /* In case the caller inspects. */
1688 /* Mark as successfully retrieved. */
1691 CLOSE_INVALIDATE (sock); /* would be CLOSE_FINISH, but there
1692 might be more bytes in the body. */
1693 return RETRUNNEEDED;
1695 if ((contrange != 0 && contrange != hs->restval)
1696 || (H_PARTIAL (statcode) && !contrange))
1698 /* The Range request was somehow misunderstood by the server.
1701 CLOSE_INVALIDATE (sock);
1704 hs->contlen = contlen + contrange;
1710 /* No need to print this output if the body won't be
1711 downloaded at all, or if the original server response is
1713 logputs (LOG_VERBOSE, _("Length: "));
1716 logputs (LOG_VERBOSE, legible (contlen + contrange));
1718 logprintf (LOG_VERBOSE, _(" (%s to go)"), legible (contlen));
1721 logputs (LOG_VERBOSE,
1722 opt.ignore_length ? _("ignored") : _("unspecified"));
1724 logprintf (LOG_VERBOSE, " [%s]\n", escnonprint (type));
1726 logputs (LOG_VERBOSE, "\n");
1730 type = NULL; /* We don't need it any more. */
1732 /* Return if we have no intention of further downloading. */
1733 if (!(*dt & RETROKF) || (*dt & HEAD_ONLY))
1735 /* In case the caller cares to look... */
1739 /* Pre-1.10 Wget used CLOSE_INVALIDATE here. Now we trust the
1740 servers not to send body in response to a HEAD request. If
1741 you encounter such a server (more likely a broken CGI), use
1742 `--no-http-keep-alive'. */
1743 CLOSE_FINISH (sock);
1744 return RETRFINISHED;
1747 /* Open the local file. */
1750 mkalldirs (*hs->local_file);
1752 rotate_backups (*hs->local_file);
1754 fp = fopen (*hs->local_file, "ab");
1755 else if (opt.noclobber || opt.always_rest || opt.timestamping || opt.dirstruct
1756 || opt.output_document)
1757 fp = fopen (*hs->local_file, "wb");
1760 fp = fopen_excl (*hs->local_file, 0);
1761 if (!fp && errno == EEXIST)
1763 /* We cannot just invent a new name and use it (which is
1764 what functions like unique_create typically do)
1765 because we told the user we'd use this name.
1766 Instead, return and retry the download. */
1767 logprintf (LOG_NOTQUIET,
1768 _("%s has sprung into existence.\n"),
1770 CLOSE_INVALIDATE (sock);
1771 return FOPEN_EXCL_ERR;
1776 logprintf (LOG_NOTQUIET, "%s: %s\n", *hs->local_file, strerror (errno));
1777 CLOSE_INVALIDATE (sock);
1784 /* #### This confuses the timestamping code that checks for file
1785 size. Maybe we should save some additional information? */
1786 if (opt.save_headers)
1787 fwrite (head, 1, strlen (head), fp);
1789 /* Download the request body. */
1792 flags |= rb_read_exactly;
1793 if (hs->restval > 0 && contrange == 0)
1794 /* If the server ignored our range request, instruct fd_read_body
1795 to skip the first RESTVAL bytes of body. */
1796 flags |= rb_skip_startpos;
1797 hs->len = hs->restval;
1799 hs->res = fd_read_body (sock, fp, contlen != -1 ? contlen : 0,
1800 hs->restval, &hs->rd_size, &hs->len, &hs->dltime,
1804 CLOSE_FINISH (sock);
1806 CLOSE_INVALIDATE (sock);
1809 /* Close or flush the file. We have to be careful to check for
1810 error here. Checking the result of fwrite() is not enough --
1811 errors could go unnoticed! */
1814 flush_res = fclose (fp);
1816 flush_res = fflush (fp);
1817 if (flush_res == EOF)
1822 return RETRFINISHED;
1825 /* The genuine HTTP loop! This is the part where the retrieval is
1826 retried, and retried, and retried, and... */
1828 http_loop (struct url *u, char **newloc, char **local_file, const char *referer,
1829 int *dt, struct url *proxy)
1832 int use_ts, got_head = 0; /* time-stamping info */
1833 char *filename_plus_orig_suffix;
1834 char *local_filename = NULL;
1835 char *tms, *locf, *tmrate;
1837 time_t tml = -1, tmr = -1; /* local and remote time-stamps */
1838 wgint local_size = 0; /* the size of the local file */
1839 size_t filename_len;
1840 struct http_stat hstat; /* HTTP status */
1844 /* This used to be done in main(), but it's a better idea to do it
1845 here so that we don't go through the hoops if we're just using
1849 if (!wget_cookie_jar)
1850 wget_cookie_jar = cookie_jar_new ();
1851 if (opt.cookies_input && !cookies_loaded_p)
1853 cookie_jar_load (wget_cookie_jar, opt.cookies_input);
1854 cookies_loaded_p = 1;
1860 /* Warn on (likely bogus) wildcard usage in HTTP. Don't use
1861 has_wildcards_p because it would also warn on `?', and we know that
1862 shows up in CGI paths a *lot*. */
1863 if (strchr (u->url, '*'))
1864 logputs (LOG_VERBOSE, _("Warning: wildcards not supported in HTTP.\n"));
1868 /* Determine the local filename. */
1869 if (local_file && *local_file)
1870 hstat.local_file = local_file;
1871 else if (local_file && !opt.output_document)
1873 *local_file = url_file_name (u);
1874 hstat.local_file = local_file;
1878 dummy = url_file_name (u);
1879 hstat.local_file = &dummy;
1880 /* be honest about where we will save the file */
1881 if (local_file && opt.output_document)
1882 *local_file = HYPHENP (opt.output_document) ? NULL : xstrdup (opt.output_document);
1885 if (!opt.output_document)
1886 locf = *hstat.local_file;
1888 locf = opt.output_document;
1890 hstat.referer = referer;
1892 filename_len = strlen (*hstat.local_file);
1893 filename_plus_orig_suffix = alloca (filename_len + sizeof (".orig"));
1895 if (opt.noclobber && file_exists_p (*hstat.local_file))
1897 /* If opt.noclobber is turned on and file already exists, do not
1898 retrieve the file */
1899 logprintf (LOG_VERBOSE, _("\
1900 File `%s' already there, will not retrieve.\n"), *hstat.local_file);
1901 /* If the file is there, we suppose it's retrieved OK. */
1904 /* #### Bogusness alert. */
1905 /* If its suffix is "html" or "htm" or similar, assume text/html. */
1906 if (has_html_suffix_p (*hstat.local_file))
1914 if (opt.timestamping)
1916 int local_dot_orig_file_exists = 0;
1918 if (opt.backup_converted)
1919 /* If -K is specified, we'll act on the assumption that it was specified
1920 last time these files were downloaded as well, and instead of just
1921 comparing local file X against server file X, we'll compare local
1922 file X.orig (if extant, else X) against server file X. If -K
1923 _wasn't_ specified last time, or the server contains files called
1924 *.orig, -N will be back to not operating correctly with -k. */
1926 /* Would a single s[n]printf() call be faster? --dan
1928 Definitely not. sprintf() is horribly slow. It's a
1929 different question whether the difference between the two
1930 affects a program. Usually I'd say "no", but at one
1931 point I profiled Wget, and found that a measurable and
1932 non-negligible amount of time was lost calling sprintf()
1933 in url.c. Replacing sprintf with inline calls to
1934 strcpy() and number_to_string() made a difference.
1936 memcpy (filename_plus_orig_suffix, *hstat.local_file, filename_len);
1937 memcpy (filename_plus_orig_suffix + filename_len,
1938 ".orig", sizeof (".orig"));
1940 /* Try to stat() the .orig file. */
1941 if (stat (filename_plus_orig_suffix, &st) == 0)
1943 local_dot_orig_file_exists = 1;
1944 local_filename = filename_plus_orig_suffix;
1948 if (!local_dot_orig_file_exists)
1949 /* Couldn't stat() <file>.orig, so try to stat() <file>. */
1950 if (stat (*hstat.local_file, &st) == 0)
1951 local_filename = *hstat.local_file;
1953 if (local_filename != NULL)
1954 /* There was a local file, so we'll check later to see if the version
1955 the server has is the same version we already have, allowing us to
1961 /* Modification time granularity is 2 seconds for Windows, so
1962 increase local time by 1 second for later comparison. */
1965 local_size = st.st_size;
1969 /* Reset the counter. */
1975 /* Increment the pass counter. */
1977 sleep_between_retrievals (count);
1978 /* Get the current time string. */
1979 tms = time_str (NULL);
1980 /* Print fetch message, if opt.verbose. */
1983 char *hurl = url_string (u, 1);
1987 sprintf (tmp, _("(try:%2d)"), count);
1988 logprintf (LOG_VERBOSE, "--%s-- %s\n %s => `%s'\n",
1989 tms, hurl, tmp, locf);
1991 ws_changetitle (hurl);
1996 /* Default document type is empty. However, if spider mode is
1997 on or time-stamping is employed, HEAD_ONLY commands is
1998 encoded within *dt. */
1999 if (opt.spider || (use_ts && !got_head))
2004 /* Decide whether or not to restart. */
2007 hstat.restval = hstat.len; /* continue where we left off */
2008 else if (opt.always_rest
2009 && stat (locf, &st) == 0
2010 && S_ISREG (st.st_mode))
2011 hstat.restval = st.st_size;
2013 /* Decide whether to send the no-cache directive. We send it in
2015 a) we're using a proxy, and we're past our first retrieval.
2016 Some proxies are notorious for caching incomplete data, so
2017 we require a fresh get.
2018 b) caching is explicitly inhibited. */
2019 if ((proxy && count > 1) /* a */
2020 || !opt.allow_cache /* b */
2022 *dt |= SEND_NOCACHE;
2024 *dt &= ~SEND_NOCACHE;
2026 /* Try fetching the document, or at least its head. */
2027 err = gethttp (u, &hstat, dt, proxy);
2029 /* It's unfortunate that wget determines the local filename before finding
2030 out the Content-Type of the file. Barring a major restructuring of the
2031 code, we need to re-set locf here, since gethttp() may have xrealloc()d
2032 *hstat.local_file to tack on ".html". */
2033 if (!opt.output_document)
2034 locf = *hstat.local_file;
2037 tms = time_str (NULL);
2038 /* Get the new location (with or without the redirection). */
2040 *newloc = xstrdup (hstat.newloc);
2043 case HERR: case HEOF: case CONSOCKERR: case CONCLOSED:
2044 case CONERROR: case READERR: case WRITEFAILED:
2045 case RANGEERR: case FOPEN_EXCL_ERR:
2046 /* Non-fatal errors continue executing the loop, which will
2047 bring them to "while" statement at the end, to judge
2048 whether the number of tries was exceeded. */
2049 free_hstat (&hstat);
2050 printwhat (count, opt.ntry);
2051 if (err == FOPEN_EXCL_ERR)
2053 /* Re-determine the file name. */
2054 if (local_file && *local_file)
2056 xfree (*local_file);
2057 *local_file = url_file_name (u);
2058 hstat.local_file = local_file;
2063 dummy = url_file_name (u);
2064 hstat.local_file = &dummy;
2066 /* be honest about where we will save the file */
2067 if (local_file && opt.output_document)
2068 *local_file = HYPHENP (opt.output_document) ? NULL : xstrdup (opt.output_document);
2069 if (!opt.output_document)
2070 locf = *hstat.local_file;
2072 locf = opt.output_document;
2076 case HOSTERR: case CONIMPOSSIBLE: case PROXERR: case AUTHFAILED:
2077 case SSLERRCTXCREATE: case CONTNOTSUPPORTED:
2078 /* Fatal errors just return from the function. */
2079 free_hstat (&hstat);
2083 case FWRITEERR: case FOPENERR:
2084 /* Another fatal error. */
2085 logputs (LOG_VERBOSE, "\n");
2086 logprintf (LOG_NOTQUIET, _("Cannot write to `%s' (%s).\n"),
2087 *hstat.local_file, strerror (errno));
2088 free_hstat (&hstat);
2093 /* Another fatal error. */
2094 logputs (LOG_VERBOSE, "\n");
2095 logprintf (LOG_NOTQUIET, _("Unable to establish SSL connection.\n"));
2096 free_hstat (&hstat);
2101 /* Return the new location to the caller. */
2104 logprintf (LOG_NOTQUIET,
2105 _("ERROR: Redirection (%d) without location.\n"),
2107 free_hstat (&hstat);
2111 free_hstat (&hstat);
2116 /* The file was already fully retrieved. */
2117 free_hstat (&hstat);
2122 /* Deal with you later. */
2125 /* All possibilities should have been exhausted. */
2128 if (!(*dt & RETROKF))
2132 /* #### Ugly ugly ugly! */
2133 char *hurl = url_string (u, 1);
2134 logprintf (LOG_NONVERBOSE, "%s:\n", hurl);
2137 logprintf (LOG_NOTQUIET, _("%s ERROR %d: %s.\n"),
2138 tms, hstat.statcode, escnonprint (hstat.error));
2139 logputs (LOG_VERBOSE, "\n");
2140 free_hstat (&hstat);
2145 /* Did we get the time-stamp? */
2148 if (opt.timestamping && !hstat.remote_time)
2150 logputs (LOG_NOTQUIET, _("\
2151 Last-modified header missing -- time-stamps turned off.\n"));
2153 else if (hstat.remote_time)
2155 /* Convert the date-string into struct tm. */
2156 tmr = http_atotm (hstat.remote_time);
2157 if (tmr == (time_t) (-1))
2158 logputs (LOG_VERBOSE, _("\
2159 Last-modified header invalid -- time-stamp ignored.\n"));
2163 /* The time-stamping section. */
2168 use_ts = 0; /* no more time-stamping */
2169 count = 0; /* the retrieve count for HEAD is
2171 if (hstat.remote_time && tmr != (time_t) (-1))
2173 /* Now time-stamping can be used validly. Time-stamping
2174 means that if the sizes of the local and remote file
2175 match, and local file is newer than the remote file,
2176 it will not be retrieved. Otherwise, the normal
2177 download procedure is resumed. */
2179 (hstat.contlen == -1 || local_size == hstat.contlen))
2181 logprintf (LOG_VERBOSE, _("\
2182 Server file no newer than local file `%s' -- not retrieving.\n\n"),
2184 free_hstat (&hstat);
2188 else if (tml >= tmr)
2189 logprintf (LOG_VERBOSE, _("\
2190 The sizes do not match (local %s) -- retrieving.\n"),
2191 number_to_static_string (local_size));
2193 logputs (LOG_VERBOSE,
2194 _("Remote file is newer, retrieving.\n"));
2196 free_hstat (&hstat);
2199 if ((tmr != (time_t) (-1))
2201 && ((hstat.len == hstat.contlen) ||
2202 ((hstat.res == 0) &&
2203 ((hstat.contlen == -1) ||
2204 (hstat.len >= hstat.contlen && !opt.kill_longer)))))
2206 /* #### This code repeats in http.c and ftp.c. Move it to a
2208 const char *fl = NULL;
2209 if (opt.output_document)
2211 if (output_stream_regular)
2212 fl = opt.output_document;
2215 fl = *hstat.local_file;
2219 /* End of time-stamping section. */
2223 logprintf (LOG_NOTQUIET, "%d %s\n\n", hstat.statcode,
2224 escnonprint (hstat.error));
2229 tmrate = retr_rate (hstat.rd_size, hstat.dltime, 0);
2231 if (hstat.len == hstat.contlen)
2235 logprintf (LOG_VERBOSE,
2236 _("%s (%s) - `%s' saved [%s/%s]\n\n"),
2238 number_to_static_string (hstat.len),
2239 number_to_static_string (hstat.contlen));
2240 logprintf (LOG_NONVERBOSE,
2241 "%s URL:%s [%s/%s] -> \"%s\" [%d]\n",
2243 number_to_static_string (hstat.len),
2244 number_to_static_string (hstat.contlen),
2248 total_downloaded_bytes += hstat.len;
2250 /* Remember that we downloaded the file for later ".orig" code. */
2251 if (*dt & ADDED_HTML_EXTENSION)
2252 downloaded_file(FILE_DOWNLOADED_AND_HTML_EXTENSION_ADDED, locf);
2254 downloaded_file(FILE_DOWNLOADED_NORMALLY, locf);
2256 free_hstat (&hstat);
2260 else if (hstat.res == 0) /* No read error */
2262 if (hstat.contlen == -1) /* We don't know how much we were supposed
2263 to get, so assume we succeeded. */
2267 logprintf (LOG_VERBOSE,
2268 _("%s (%s) - `%s' saved [%s]\n\n"),
2270 number_to_static_string (hstat.len));
2271 logprintf (LOG_NONVERBOSE,
2272 "%s URL:%s [%s] -> \"%s\" [%d]\n",
2273 tms, u->url, number_to_static_string (hstat.len),
2277 total_downloaded_bytes += hstat.len;
2279 /* Remember that we downloaded the file for later ".orig" code. */
2280 if (*dt & ADDED_HTML_EXTENSION)
2281 downloaded_file(FILE_DOWNLOADED_AND_HTML_EXTENSION_ADDED, locf);
2283 downloaded_file(FILE_DOWNLOADED_NORMALLY, locf);
2285 free_hstat (&hstat);
2289 else if (hstat.len < hstat.contlen) /* meaning we lost the
2290 connection too soon */
2292 logprintf (LOG_VERBOSE,
2293 _("%s (%s) - Connection closed at byte %s. "),
2294 tms, tmrate, number_to_static_string (hstat.len));
2295 printwhat (count, opt.ntry);
2296 free_hstat (&hstat);
2299 else if (!opt.kill_longer) /* meaning we got more than expected */
2301 logprintf (LOG_VERBOSE,
2302 _("%s (%s) - `%s' saved [%s/%s])\n\n"),
2304 number_to_static_string (hstat.len),
2305 number_to_static_string (hstat.contlen));
2306 logprintf (LOG_NONVERBOSE,
2307 "%s URL:%s [%s/%s] -> \"%s\" [%d]\n",
2309 number_to_static_string (hstat.len),
2310 number_to_static_string (hstat.contlen),
2313 total_downloaded_bytes += hstat.len;
2315 /* Remember that we downloaded the file for later ".orig" code. */
2316 if (*dt & ADDED_HTML_EXTENSION)
2317 downloaded_file(FILE_DOWNLOADED_AND_HTML_EXTENSION_ADDED, locf);
2319 downloaded_file(FILE_DOWNLOADED_NORMALLY, locf);
2321 free_hstat (&hstat);
2325 else /* the same, but not accepted */
2327 logprintf (LOG_VERBOSE,
2328 _("%s (%s) - Connection closed at byte %s/%s. "),
2330 number_to_static_string (hstat.len),
2331 number_to_static_string (hstat.contlen));
2332 printwhat (count, opt.ntry);
2333 free_hstat (&hstat);
2337 else /* now hstat.res can only be -1 */
2339 if (hstat.contlen == -1)
2341 logprintf (LOG_VERBOSE,
2342 _("%s (%s) - Read error at byte %s (%s)."),
2343 tms, tmrate, number_to_static_string (hstat.len),
2345 printwhat (count, opt.ntry);
2346 free_hstat (&hstat);
2349 else /* hstat.res == -1 and contlen is given */
2351 logprintf (LOG_VERBOSE,
2352 _("%s (%s) - Read error at byte %s/%s (%s). "),
2354 number_to_static_string (hstat.len),
2355 number_to_static_string (hstat.contlen),
2357 printwhat (count, opt.ntry);
2358 free_hstat (&hstat);
2365 while (!opt.ntry || (count < opt.ntry));
2369 /* Converts struct tm to time_t, assuming the data in tm is UTC rather
2370 than local timezone.
2372 mktime is similar but assumes struct tm, also known as the
2373 "broken-down" form of time, is in local time zone. mktime_from_utc
2374 uses mktime to make the conversion understanding that an offset
2375 will be introduced by the local time assumption.
2377 mktime_from_utc then measures the introduced offset by applying
2378 gmtime to the initial result and applying mktime to the resulting
2379 "broken-down" form. The difference between the two mktime results
2380 is the measured offset which is then subtracted from the initial
2381 mktime result to yield a calendar time which is the value returned.
2383 tm_isdst in struct tm is set to 0 to force mktime to introduce a
2384 consistent offset (the non DST offset) since tm and tm+o might be
2385 on opposite sides of a DST change.
2387 Some implementations of mktime return -1 for the nonexistent
2388 localtime hour at the beginning of DST. In this event, use
2389 mktime(tm - 1hr) + 3600.
2393 gmtime(t+o) --> tm+o
2394 mktime(tm+o) --> t+2o
2395 t+o - (t+2o - t+o) = t
2397 Note that glibc contains a function of the same purpose named
2398 `timegm' (reverse of gmtime). But obviously, it is not universally
2399 available, and unfortunately it is not straightforwardly
2400 extractable for use here. Perhaps configure should detect timegm
2401 and use it where available.
2403 Contributed by Roger Beeman <beeman@cisco.com>, with the help of
2404 Mark Baushke <mdb@cisco.com> and the rest of the Gurus at CISCO.
2405 Further improved by Roger with assistance from Edward J. Sabol
2406 based on input by Jamie Zawinski. */
2409 mktime_from_utc (struct tm *t)
2420 return -1; /* can't deal with output from strptime */
2431 return -1; /* can't deal with output from gmtime */
2434 return (tl - (tb - tl));
2437 /* Check whether the result of strptime() indicates success.
2438 strptime() returns the pointer to how far it got to in the string.
2439 The processing has been successful if the string is at `GMT' or
2440 `+X', or at the end of the string.
2442 In extended regexp parlance, the function returns 1 if P matches
2443 "^ *(GMT|[+-][0-9]|$)", 0 otherwise. P being NULL (which strptime
2444 can return) is considered a failure and 0 is returned. */
2446 check_end (const char *p)
2450 while (ISSPACE (*p))
2453 || (p[0] == 'G' && p[1] == 'M' && p[2] == 'T')
2454 || ((p[0] == '+' || p[0] == '-') && ISDIGIT (p[1])))
2460 /* Convert the textual specification of time in TIME_STRING to the
2461 number of seconds since the Epoch.
2463 TIME_STRING can be in any of the three formats RFC2068 allows the
2464 HTTP servers to emit -- RFC1123-date, RFC850-date or asctime-date.
2465 Timezones are ignored, and should be GMT.
2467 Return the computed time_t representation, or -1 if the conversion
2470 This function uses strptime with various string formats for parsing
2471 TIME_STRING. This results in a parser that is not as lenient in
2472 interpreting TIME_STRING as I would like it to be. Being based on
2473 strptime, it always allows shortened months, one-digit days, etc.,
2474 but due to the multitude of formats in which time can be
2475 represented, an ideal HTTP time parser would be even more
2476 forgiving. It should completely ignore things like week days and
2477 concentrate only on the various forms of representing years,
2478 months, days, hours, minutes, and seconds. For example, it would
2479 be nice if it accepted ISO 8601 out of the box.
2481 I've investigated free and PD code for this purpose, but none was
2482 usable. getdate was big and unwieldy, and had potential copyright
2483 issues, or so I was informed. Dr. Marcus Hennecke's atotm(),
2484 distributed with phttpd, is excellent, but we cannot use it because
2485 it is not assigned to the FSF. So I stuck it with strptime. */
2488 http_atotm (const char *time_string)
2490 /* NOTE: Solaris strptime man page claims that %n and %t match white
2491 space, but that's not universally available. Instead, we simply
2492 use ` ' to mean "skip all WS", which works under all strptime
2493 implementations I've tested. */
2495 static const char *time_formats[] = {
2496 "%a, %d %b %Y %T", /* RFC1123: Thu, 29 Jan 1998 22:12:57 */
2497 "%A, %d-%b-%y %T", /* RFC850: Thursday, 29-Jan-98 22:12:57 */
2498 "%a, %d-%b-%Y %T", /* pseudo-RFC850: Thu, 29-Jan-1998 22:12:57
2499 (google.com uses this for their cookies.) */
2500 "%a %b %d %T %Y" /* asctime: Thu Jan 29 22:12:57 1998 */
2506 /* According to Roger Beeman, we need to initialize tm_isdst, since
2507 strptime won't do it. */
2510 /* Note that under foreign locales Solaris strptime() fails to
2511 recognize English dates, which renders this function useless. We
2512 solve this by being careful not to affect LC_TIME when
2513 initializing locale.
2515 Another solution would be to temporarily set locale to C, invoke
2516 strptime(), and restore it back. This is slow and dirty,
2517 however, and locale support other than LC_MESSAGES can mess other
2518 things, so I rather chose to stick with just setting LC_MESSAGES.
2520 GNU strptime does not have this problem because it recognizes
2521 both international and local dates. */
2523 for (i = 0; i < countof (time_formats); i++)
2524 if (check_end (strptime (time_string, time_formats[i], &t)))
2525 return mktime_from_utc (&t);
2527 /* All formats have failed. */
2531 /* Authorization support: We support two authorization schemes:
2533 * `Basic' scheme, consisting of base64-ing USER:PASSWORD string;
2535 * `Digest' scheme, added by Junio Hamano <junio@twinsun.com>,
2536 consisting of answering to the server's challenge with the proper
2539 /* How many bytes it will take to store LEN bytes in base64. */
2540 #define BASE64_LENGTH(len) (4 * (((len) + 2) / 3))
2542 /* Encode the string S of length LENGTH to base64 format and place it
2543 to STORE. STORE will be 0-terminated, and must point to a writable
2544 buffer of at least 1+BASE64_LENGTH(length) bytes. */
2546 base64_encode (const char *s, char *store, int length)
2548 /* Conversion table. */
2549 static char tbl[64] = {
2550 'A','B','C','D','E','F','G','H',
2551 'I','J','K','L','M','N','O','P',
2552 'Q','R','S','T','U','V','W','X',
2553 'Y','Z','a','b','c','d','e','f',
2554 'g','h','i','j','k','l','m','n',
2555 'o','p','q','r','s','t','u','v',
2556 'w','x','y','z','0','1','2','3',
2557 '4','5','6','7','8','9','+','/'
2560 unsigned char *p = (unsigned char *)store;
2562 /* Transform the 3x8 bits to 4x6 bits, as required by base64. */
2563 for (i = 0; i < length; i += 3)
2565 *p++ = tbl[s[0] >> 2];
2566 *p++ = tbl[((s[0] & 3) << 4) + (s[1] >> 4)];
2567 *p++ = tbl[((s[1] & 0xf) << 2) + (s[2] >> 6)];
2568 *p++ = tbl[s[2] & 0x3f];
2571 /* Pad the result if necessary... */
2572 if (i == length + 1)
2574 else if (i == length + 2)
2575 *(p - 1) = *(p - 2) = '=';
2576 /* ...and zero-terminate it. */
2580 /* Create the authentication header contents for the `Basic' scheme.
2581 This is done by encoding the string `USER:PASS' in base64 and
2582 prepending `HEADER: Basic ' to it. */
2584 basic_authentication_encode (const char *user, const char *passwd)
2587 int len1 = strlen (user) + 1 + strlen (passwd);
2588 int len2 = BASE64_LENGTH (len1);
2590 t1 = (char *)alloca (len1 + 1);
2591 sprintf (t1, "%s:%s", user, passwd);
2593 t2 = (char *)alloca (len2 + 1);
2594 base64_encode (t1, t2, len1);
2596 return concat_strings ("Basic ", t2, (char *) 0);
2599 #define SKIP_WS(x) do { \
2600 while (ISSPACE (*(x))) \
2605 /* Parse HTTP `WWW-Authenticate:' header. AU points to the beginning
2606 of a field in such a header. If the field is the one specified by
2607 ATTR_NAME ("realm", "opaque", and "nonce" are used by the current
2608 digest authorization code), extract its value in the (char*)
2609 variable pointed by RET. Returns negative on a malformed header,
2610 or number of bytes that have been parsed by this call. */
2612 extract_header_attr (const char *au, const char *attr_name, char **ret)
2615 const char *cp = au;
2617 if (strncmp (cp, attr_name, strlen (attr_name)) == 0)
2619 cp += strlen (attr_name);
2632 for (ep = cp; *ep && *ep != '\"'; ep++)
2637 *ret = strdupdelim (cp, ep);
2644 /* Dump the hexadecimal representation of HASH to BUF. HASH should be
2645 an array of 16 bytes containing the hash keys, and BUF should be a
2646 buffer of 33 writable characters (32 for hex digits plus one for
2647 zero termination). */
2649 dump_hash (unsigned char *buf, const unsigned char *hash)
2653 for (i = 0; i < MD5_HASHLEN; i++, hash++)
2655 *buf++ = XNUM_TO_digit (*hash >> 4);
2656 *buf++ = XNUM_TO_digit (*hash & 0xf);
2661 /* Take the line apart to find the challenge, and compose a digest
2662 authorization header. See RFC2069 section 2.1.2. */
2664 digest_authentication_encode (const char *au, const char *user,
2665 const char *passwd, const char *method,
2668 static char *realm, *opaque, *nonce;
2673 { "realm", &realm },
2674 { "opaque", &opaque },
2679 realm = opaque = nonce = NULL;
2681 au += 6; /* skip over `Digest' */
2687 for (i = 0; i < countof (options); i++)
2689 int skip = extract_header_attr (au, options[i].name,
2690 options[i].variable);
2694 xfree_null (opaque);
2704 if (i == countof (options))
2706 while (*au && *au != '=')
2714 while (*au && *au != '\"')
2721 while (*au && *au != ',')
2726 if (!realm || !nonce || !user || !passwd || !path || !method)
2729 xfree_null (opaque);
2734 /* Calculate the digest value. */
2736 ALLOCA_MD5_CONTEXT (ctx);
2737 unsigned char hash[MD5_HASHLEN];
2738 unsigned char a1buf[MD5_HASHLEN * 2 + 1], a2buf[MD5_HASHLEN * 2 + 1];
2739 unsigned char response_digest[MD5_HASHLEN * 2 + 1];
2741 /* A1BUF = H(user ":" realm ":" password) */
2743 gen_md5_update ((unsigned char *)user, strlen (user), ctx);
2744 gen_md5_update ((unsigned char *)":", 1, ctx);
2745 gen_md5_update ((unsigned char *)realm, strlen (realm), ctx);
2746 gen_md5_update ((unsigned char *)":", 1, ctx);
2747 gen_md5_update ((unsigned char *)passwd, strlen (passwd), ctx);
2748 gen_md5_finish (ctx, hash);
2749 dump_hash (a1buf, hash);
2751 /* A2BUF = H(method ":" path) */
2753 gen_md5_update ((unsigned char *)method, strlen (method), ctx);
2754 gen_md5_update ((unsigned char *)":", 1, ctx);
2755 gen_md5_update ((unsigned char *)path, strlen (path), ctx);
2756 gen_md5_finish (ctx, hash);
2757 dump_hash (a2buf, hash);
2759 /* RESPONSE_DIGEST = H(A1BUF ":" nonce ":" A2BUF) */
2761 gen_md5_update (a1buf, MD5_HASHLEN * 2, ctx);
2762 gen_md5_update ((unsigned char *)":", 1, ctx);
2763 gen_md5_update ((unsigned char *)nonce, strlen (nonce), ctx);
2764 gen_md5_update ((unsigned char *)":", 1, ctx);
2765 gen_md5_update (a2buf, MD5_HASHLEN * 2, ctx);
2766 gen_md5_finish (ctx, hash);
2767 dump_hash (response_digest, hash);
2769 res = (char*) xmalloc (strlen (user)
2774 + 2 * MD5_HASHLEN /*strlen (response_digest)*/
2775 + (opaque ? strlen (opaque) : 0)
2777 sprintf (res, "Digest \
2778 username=\"%s\", realm=\"%s\", nonce=\"%s\", uri=\"%s\", response=\"%s\"",
2779 user, realm, nonce, path, response_digest);
2782 char *p = res + strlen (res);
2783 strcat (p, ", opaque=\"");
2790 #endif /* USE_DIGEST */
2793 #define BEGINS_WITH(line, string_constant) \
2794 (!strncasecmp (line, string_constant, sizeof (string_constant) - 1) \
2795 && (ISSPACE (line[sizeof (string_constant) - 1]) \
2796 || !line[sizeof (string_constant) - 1]))
2799 known_authentication_scheme_p (const char *au)
2801 return BEGINS_WITH (au, "Basic")
2802 || BEGINS_WITH (au, "Digest")
2803 || BEGINS_WITH (au, "NTLM");
2808 /* Create the HTTP authorization request header. When the
2809 `WWW-Authenticate' response header is seen, according to the
2810 authorization scheme specified in that header (`Basic' and `Digest'
2811 are supported by the current implementation), produce an
2812 appropriate HTTP authorization request header. */
2814 create_authorization_line (const char *au, const char *user,
2815 const char *passwd, const char *method,
2818 if (0 == strncasecmp (au, "Basic", 5))
2819 return basic_authentication_encode (user, passwd);
2821 if (0 == strncasecmp (au, "Digest", 6))
2822 return digest_authentication_encode (au, user, passwd, method, path);
2823 #endif /* USE_DIGEST */