2 Copyright (C) 1996-2006 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 3 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, see <http://www.gnu.org/licenses/>.
19 In addition, as a special exception, the Free Software Foundation
20 gives permission to link the code of its release of Wget with the
21 OpenSSL project's "OpenSSL" library (or with modified versions of it
22 that use the same license as the "OpenSSL" library), and distribute
23 the linked executables. You must obey the GNU General Public License
24 in all respects for all of the code used other than "OpenSSL". If you
25 modify this file, you may extend this exception to your version of the
26 file, but you are not obligated to do so. If you do not wish to do
27 so, delete this exception statement from your version. */
54 # include "http-ntlm.h"
67 extern char *version_string;
70 # define MIN(x, y) ((x) > (y) ? (y) : (x))
74 static bool cookies_loaded_p;
75 static struct cookie_jar *wget_cookie_jar;
77 #define TEXTHTML_S "text/html"
78 #define TEXTXHTML_S "application/xhtml+xml"
80 /* Some status code validation macros: */
81 #define H_20X(x) (((x) >= 200) && ((x) < 300))
82 #define H_PARTIAL(x) ((x) == HTTP_STATUS_PARTIAL_CONTENTS)
83 #define H_REDIRECTED(x) ((x) == HTTP_STATUS_MOVED_PERMANENTLY \
84 || (x) == HTTP_STATUS_MOVED_TEMPORARILY \
85 || (x) == HTTP_STATUS_SEE_OTHER \
86 || (x) == HTTP_STATUS_TEMPORARY_REDIRECT)
88 /* HTTP/1.0 status codes from RFC1945, provided for reference. */
90 #define HTTP_STATUS_OK 200
91 #define HTTP_STATUS_CREATED 201
92 #define HTTP_STATUS_ACCEPTED 202
93 #define HTTP_STATUS_NO_CONTENT 204
94 #define HTTP_STATUS_PARTIAL_CONTENTS 206
96 /* Redirection 3xx. */
97 #define HTTP_STATUS_MULTIPLE_CHOICES 300
98 #define HTTP_STATUS_MOVED_PERMANENTLY 301
99 #define HTTP_STATUS_MOVED_TEMPORARILY 302
100 #define HTTP_STATUS_SEE_OTHER 303 /* from HTTP/1.1 */
101 #define HTTP_STATUS_NOT_MODIFIED 304
102 #define HTTP_STATUS_TEMPORARY_REDIRECT 307 /* from HTTP/1.1 */
104 /* Client error 4xx. */
105 #define HTTP_STATUS_BAD_REQUEST 400
106 #define HTTP_STATUS_UNAUTHORIZED 401
107 #define HTTP_STATUS_FORBIDDEN 403
108 #define HTTP_STATUS_NOT_FOUND 404
109 #define HTTP_STATUS_RANGE_NOT_SATISFIABLE 416
111 /* Server errors 5xx. */
112 #define HTTP_STATUS_INTERNAL 500
113 #define HTTP_STATUS_NOT_IMPLEMENTED 501
114 #define HTTP_STATUS_BAD_GATEWAY 502
115 #define HTTP_STATUS_UNAVAILABLE 503
118 rel_none, rel_name, rel_value, rel_both
125 struct request_header {
127 enum rp release_policy;
129 int hcount, hcapacity;
132 /* Create a new, empty request. At least request_set_method must be
133 called before the request can be used. */
135 static struct request *
138 struct request *req = xnew0 (struct request);
140 req->headers = xnew_array (struct request_header, req->hcapacity);
144 /* Set the request's method and its arguments. METH should be a
145 literal string (or it should outlive the request) because it will
146 not be freed. ARG will be freed by request_free. */
149 request_set_method (struct request *req, const char *meth, char *arg)
155 /* Return the method string passed with the last call to
156 request_set_method. */
159 request_method (const struct request *req)
164 /* Free one header according to the release policy specified with
165 request_set_header. */
168 release_header (struct request_header *hdr)
170 switch (hdr->release_policy)
187 /* Set the request named NAME to VALUE. Specifically, this means that
188 a "NAME: VALUE\r\n" header line will be used in the request. If a
189 header with the same name previously existed in the request, its
190 value will be replaced by this one. A NULL value means do nothing.
192 RELEASE_POLICY determines whether NAME and VALUE should be released
193 (freed) with request_free. Allowed values are:
195 - rel_none - don't free NAME or VALUE
196 - rel_name - free NAME when done
197 - rel_value - free VALUE when done
198 - rel_both - free both NAME and VALUE when done
200 Setting release policy is useful when arguments come from different
201 sources. For example:
203 // Don't free literal strings!
204 request_set_header (req, "Pragma", "no-cache", rel_none);
206 // Don't free a global variable, we'll need it later.
207 request_set_header (req, "Referer", opt.referer, rel_none);
209 // Value freshly allocated, free it when done.
210 request_set_header (req, "Range",
211 aprintf ("bytes=%s-", number_to_static_string (hs->restval)),
216 request_set_header (struct request *req, char *name, char *value,
217 enum rp release_policy)
219 struct request_header *hdr;
224 /* A NULL value is a no-op; if freeing the name is requested,
225 free it now to avoid leaks. */
226 if (release_policy == rel_name || release_policy == rel_both)
231 for (i = 0; i < req->hcount; i++)
233 hdr = &req->headers[i];
234 if (0 == strcasecmp (name, hdr->name))
236 /* Replace existing header. */
237 release_header (hdr);
240 hdr->release_policy = release_policy;
245 /* Install new header. */
247 if (req->hcount >= req->hcapacity)
249 req->hcapacity <<= 1;
250 req->headers = xrealloc (req->headers, req->hcapacity * sizeof (*hdr));
252 hdr = &req->headers[req->hcount++];
255 hdr->release_policy = release_policy;
258 /* Like request_set_header, but sets the whole header line, as
259 provided by the user using the `--header' option. For example,
260 request_set_user_header (req, "Foo: bar") works just like
261 request_set_header (req, "Foo", "bar"). */
264 request_set_user_header (struct request *req, const char *header)
267 const char *p = strchr (header, ':');
270 BOUNDED_TO_ALLOCA (header, p, name);
274 request_set_header (req, xstrdup (name), (char *) p, rel_name);
277 /* Remove the header with specified name from REQ. Returns true if
278 the header was actually removed, false otherwise. */
281 request_remove_header (struct request *req, char *name)
284 for (i = 0; i < req->hcount; i++)
286 struct request_header *hdr = &req->headers[i];
287 if (0 == strcasecmp (name, hdr->name))
289 release_header (hdr);
290 /* Move the remaining headers by one. */
291 if (i < req->hcount - 1)
292 memmove (hdr, hdr + 1, (req->hcount - i - 1) * sizeof (*hdr));
300 #define APPEND(p, str) do { \
301 int A_len = strlen (str); \
302 memcpy (p, str, A_len); \
306 /* Construct the request and write it to FD using fd_write. */
309 request_send (const struct request *req, int fd)
311 char *request_string, *p;
312 int i, size, write_error;
314 /* Count the request size. */
317 /* METHOD " " ARG " " "HTTP/1.0" "\r\n" */
318 size += strlen (req->method) + 1 + strlen (req->arg) + 1 + 8 + 2;
320 for (i = 0; i < req->hcount; i++)
322 struct request_header *hdr = &req->headers[i];
323 /* NAME ": " VALUE "\r\n" */
324 size += strlen (hdr->name) + 2 + strlen (hdr->value) + 2;
330 p = request_string = alloca_array (char, size);
332 /* Generate the request. */
334 APPEND (p, req->method); *p++ = ' ';
335 APPEND (p, req->arg); *p++ = ' ';
336 memcpy (p, "HTTP/1.0\r\n", 10); p += 10;
338 for (i = 0; i < req->hcount; i++)
340 struct request_header *hdr = &req->headers[i];
341 APPEND (p, hdr->name);
342 *p++ = ':', *p++ = ' ';
343 APPEND (p, hdr->value);
344 *p++ = '\r', *p++ = '\n';
347 *p++ = '\r', *p++ = '\n', *p++ = '\0';
348 assert (p - request_string == size);
352 DEBUGP (("\n---request begin---\n%s---request end---\n", request_string));
354 /* Send the request to the server. */
356 write_error = fd_write (fd, request_string, size - 1, -1);
358 logprintf (LOG_VERBOSE, _("Failed writing HTTP request: %s.\n"),
363 /* Release the resources used by REQ. */
366 request_free (struct request *req)
369 xfree_null (req->arg);
370 for (i = 0; i < req->hcount; i++)
371 release_header (&req->headers[i]);
372 xfree_null (req->headers);
376 /* Send the contents of FILE_NAME to SOCK. Make sure that exactly
377 PROMISED_SIZE bytes are sent over the wire -- if the file is
378 longer, read only that much; if the file is shorter, report an error. */
381 post_file (int sock, const char *file_name, wgint promised_size)
383 static char chunk[8192];
388 DEBUGP (("[writing POST file %s ... ", file_name));
390 fp = fopen (file_name, "rb");
393 while (!feof (fp) && written < promised_size)
396 int length = fread (chunk, 1, sizeof (chunk), fp);
399 towrite = MIN (promised_size - written, length);
400 write_error = fd_write (sock, chunk, towrite, -1);
410 /* If we've written less than was promised, report a (probably
411 nonsensical) error rather than break the promise. */
412 if (written < promised_size)
418 assert (written == promised_size);
419 DEBUGP (("done]\n"));
423 /* Determine whether [START, PEEKED + PEEKLEN) contains an empty line.
424 If so, return the pointer to the position after the line, otherwise
425 return NULL. This is used as callback to fd_read_hunk. The data
426 between START and PEEKED has been read and cannot be "unread"; the
427 data after PEEKED has only been peeked. */
430 response_head_terminator (const char *start, const char *peeked, int peeklen)
434 /* If at first peek, verify whether HUNK starts with "HTTP". If
435 not, this is a HTTP/0.9 request and we must bail out without
437 if (start == peeked && 0 != memcmp (start, "HTTP", MIN (peeklen, 4)))
440 /* Look for "\n[\r]\n", and return the following position if found.
441 Start two chars before the current to cover the possibility that
442 part of the terminator (e.g. "\n\r") arrived in the previous
444 p = peeked - start < 2 ? start : peeked - 2;
445 end = peeked + peeklen;
447 /* Check for \n\r\n or \n\n anywhere in [p, end-2). */
448 for (; p < end - 2; p++)
451 if (p[1] == '\r' && p[2] == '\n')
453 else if (p[1] == '\n')
456 /* p==end-2: check for \n\n directly preceding END. */
457 if (p[0] == '\n' && p[1] == '\n')
463 /* The maximum size of a single HTTP response we care to read. Rather
464 than being a limit of the reader implementation, this limit
465 prevents Wget from slurping all available memory upon encountering
466 malicious or buggy server output, thus protecting the user. Define
467 it to 0 to remove the limit. */
469 #define HTTP_RESPONSE_MAX_SIZE 65536
471 /* Read the HTTP request head from FD and return it. The error
472 conditions are the same as with fd_read_hunk.
474 To support HTTP/0.9 responses, this function tries to make sure
475 that the data begins with "HTTP". If this is not the case, no data
476 is read and an empty request is returned, so that the remaining
477 data can be treated as body. */
480 read_http_response_head (int fd)
482 return fd_read_hunk (fd, response_head_terminator, 512,
483 HTTP_RESPONSE_MAX_SIZE);
487 /* The response data. */
490 /* The array of pointers that indicate where each header starts.
491 For example, given this HTTP response:
498 The headers are located like this:
500 "HTTP/1.0 200 Ok\r\nDescription: some\r\n text\r\nEtag: x\r\n\r\n"
502 headers[0] headers[1] headers[2] headers[3]
504 I.e. headers[0] points to the beginning of the request,
505 headers[1] points to the end of the first header and the
506 beginning of the second one, etc. */
508 const char **headers;
511 /* Create a new response object from the text of the HTTP response,
512 available in HEAD. That text is automatically split into
513 constituent header lines for fast retrieval using
516 static struct response *
517 resp_new (const char *head)
522 struct response *resp = xnew0 (struct response);
527 /* Empty head means that we're dealing with a headerless
528 (HTTP/0.9) response. In that case, don't set HEADERS at
533 /* Split HEAD into header lines, so that resp_header_* functions
534 don't need to do this over and over again. */
540 DO_REALLOC (resp->headers, size, count + 1, const char *);
541 resp->headers[count++] = hdr;
543 /* Break upon encountering an empty line. */
544 if (!hdr[0] || (hdr[0] == '\r' && hdr[1] == '\n') || hdr[0] == '\n')
547 /* Find the end of HDR, including continuations. */
550 const char *end = strchr (hdr, '\n');
556 while (*hdr == ' ' || *hdr == '\t');
558 DO_REALLOC (resp->headers, size, count + 1, const char *);
559 resp->headers[count] = NULL;
564 /* Locate the header named NAME in the request data, starting with
565 position START. This allows the code to loop through the request
566 data, filtering for all requests of a given name. Returns the
567 found position, or -1 for failure. The code that uses this
568 function typically looks like this:
570 for (pos = 0; (pos = resp_header_locate (...)) != -1; pos++)
571 ... do something with header ...
573 If you only care about one header, use resp_header_get instead of
577 resp_header_locate (const struct response *resp, const char *name, int start,
578 const char **begptr, const char **endptr)
581 const char **headers = resp->headers;
584 if (!headers || !headers[1])
587 name_len = strlen (name);
593 for (; headers[i + 1]; i++)
595 const char *b = headers[i];
596 const char *e = headers[i + 1];
598 && b[name_len] == ':'
599 && 0 == strncasecmp (b, name, name_len))
602 while (b < e && ISSPACE (*b))
604 while (b < e && ISSPACE (e[-1]))
614 /* Find and retrieve the header named NAME in the request data. If
615 found, set *BEGPTR to its starting, and *ENDPTR to its ending
616 position, and return true. Otherwise return false.
618 This function is used as a building block for resp_header_copy
619 and resp_header_strdup. */
622 resp_header_get (const struct response *resp, const char *name,
623 const char **begptr, const char **endptr)
625 int pos = resp_header_locate (resp, name, 0, begptr, endptr);
629 /* Copy the response header named NAME to buffer BUF, no longer than
630 BUFSIZE (BUFSIZE includes the terminating 0). If the header
631 exists, true is returned, false otherwise. If there should be no
632 limit on the size of the header, use resp_header_strdup instead.
634 If BUFSIZE is 0, no data is copied, but the boolean indication of
635 whether the header is present is still returned. */
638 resp_header_copy (const struct response *resp, const char *name,
639 char *buf, int bufsize)
642 if (!resp_header_get (resp, name, &b, &e))
646 int len = MIN (e - b, bufsize - 1);
647 memcpy (buf, b, len);
653 /* Return the value of header named NAME in RESP, allocated with
654 malloc. If such a header does not exist in RESP, return NULL. */
657 resp_header_strdup (const struct response *resp, const char *name)
660 if (!resp_header_get (resp, name, &b, &e))
662 return strdupdelim (b, e);
665 /* Parse the HTTP status line, which is of format:
667 HTTP-Version SP Status-Code SP Reason-Phrase
669 The function returns the status-code, or -1 if the status line
670 appears malformed. The pointer to "reason-phrase" message is
671 returned in *MESSAGE. */
674 resp_status (const struct response *resp, char **message)
681 /* For a HTTP/0.9 response, assume status 200. */
683 *message = xstrdup (_("No headers, assuming HTTP/0.9"));
687 p = resp->headers[0];
688 end = resp->headers[1];
694 if (end - p < 4 || 0 != strncmp (p, "HTTP", 4))
698 /* Match the HTTP version. This is optional because Gnutella
699 servers have been reported to not specify HTTP version. */
700 if (p < end && *p == '/')
703 while (p < end && ISDIGIT (*p))
705 if (p < end && *p == '.')
707 while (p < end && ISDIGIT (*p))
711 while (p < end && ISSPACE (*p))
713 if (end - p < 3 || !ISDIGIT (p[0]) || !ISDIGIT (p[1]) || !ISDIGIT (p[2]))
716 status = 100 * (p[0] - '0') + 10 * (p[1] - '0') + (p[2] - '0');
721 while (p < end && ISSPACE (*p))
723 while (p < end && ISSPACE (end[-1]))
725 *message = strdupdelim (p, end);
731 /* Release the resources used by RESP. */
734 resp_free (struct response *resp)
736 xfree_null (resp->headers);
740 /* Print a single line of response, the characters [b, e). We tried
742 logprintf (LOG_VERBOSE, "%s%.*s\n", prefix, (int) (e - b), b);
743 but that failed to escape the non-printable characters and, in fact,
744 caused crashes in UTF-8 locales. */
747 print_response_line(const char *prefix, const char *b, const char *e)
750 BOUNDED_TO_ALLOCA(b, e, copy);
751 logprintf (LOG_VERBOSE, "%s%s\n", prefix, escnonprint(copy));
754 /* Print the server response, line by line, omitting the trailing CRLF
755 from individual header lines, and prefixed with PREFIX. */
758 print_server_response (const struct response *resp, const char *prefix)
763 for (i = 0; resp->headers[i + 1]; i++)
765 const char *b = resp->headers[i];
766 const char *e = resp->headers[i + 1];
768 if (b < e && e[-1] == '\n')
770 if (b < e && e[-1] == '\r')
772 print_response_line(prefix, b, e);
776 /* Parse the `Content-Range' header and extract the information it
777 contains. Returns true if successful, false otherwise. */
779 parse_content_range (const char *hdr, wgint *first_byte_ptr,
780 wgint *last_byte_ptr, wgint *entity_length_ptr)
784 /* Ancient versions of Netscape proxy server, presumably predating
785 rfc2068, sent out `Content-Range' without the "bytes"
787 if (0 == strncasecmp (hdr, "bytes", 5))
790 /* "JavaWebServer/1.1.1" sends "bytes: x-y/z", contrary to the
794 while (ISSPACE (*hdr))
801 for (num = 0; ISDIGIT (*hdr); hdr++)
802 num = 10 * num + (*hdr - '0');
803 if (*hdr != '-' || !ISDIGIT (*(hdr + 1)))
805 *first_byte_ptr = num;
807 for (num = 0; ISDIGIT (*hdr); hdr++)
808 num = 10 * num + (*hdr - '0');
809 if (*hdr != '/' || !ISDIGIT (*(hdr + 1)))
811 *last_byte_ptr = num;
813 for (num = 0; ISDIGIT (*hdr); hdr++)
814 num = 10 * num + (*hdr - '0');
815 *entity_length_ptr = num;
819 /* Read the body of the request, but don't store it anywhere and don't
820 display a progress gauge. This is useful for reading the bodies of
821 administrative responses to which we will soon issue another
822 request. The response is not useful to the user, but reading it
823 allows us to continue using the same connection to the server.
825 If reading fails, false is returned, true otherwise. In debug
826 mode, the body is displayed for debugging purposes. */
829 skip_short_body (int fd, wgint contlen)
832 SKIP_SIZE = 512, /* size of the download buffer */
833 SKIP_THRESHOLD = 4096 /* the largest size we read */
835 char dlbuf[SKIP_SIZE + 1];
836 dlbuf[SKIP_SIZE] = '\0'; /* so DEBUGP can safely print it */
838 /* We shouldn't get here with unknown contlen. (This will change
839 with HTTP/1.1, which supports "chunked" transfer.) */
840 assert (contlen != -1);
842 /* If the body is too large, it makes more sense to simply close the
843 connection than to try to read the body. */
844 if (contlen > SKIP_THRESHOLD)
847 DEBUGP (("Skipping %s bytes of body: [", number_to_static_string (contlen)));
851 int ret = fd_read (fd, dlbuf, MIN (contlen, SKIP_SIZE), -1);
854 /* Don't normally report the error since this is an
855 optimization that should be invisible to the user. */
856 DEBUGP (("] aborting (%s).\n",
857 ret < 0 ? fd_errstr (fd) : "EOF received"));
861 /* Safe even if %.*s bogusly expects terminating \0 because
862 we've zero-terminated dlbuf above. */
863 DEBUGP (("%.*s", ret, dlbuf));
866 DEBUGP (("] done.\n"));
870 /* Extract a parameter from the string (typically an HTTP header) at
871 **SOURCE and advance SOURCE to the next parameter. Return false
872 when there are no more parameters to extract. The name of the
873 parameter is returned in NAME, and the value in VALUE. If the
874 parameter has no value, the token's value is zeroed out.
876 For example, if *SOURCE points to the string "attachment;
877 filename=\"foo bar\"", the first call to this function will return
878 the token named "attachment" and no value, and the second call will
879 return the token named "filename" and value "foo bar". The third
880 call will return false, indicating no more valid tokens. */
883 extract_param (const char **source, param_token *name, param_token *value,
886 const char *p = *source;
888 while (ISSPACE (*p)) ++p;
892 return false; /* no error; nothing more to extract */
897 while (*p && !ISSPACE (*p) && *p != '=' && *p != separator) ++p;
899 if (name->b == name->e)
900 return false; /* empty name: error */
901 while (ISSPACE (*p)) ++p;
902 if (*p == separator || !*p) /* no value */
905 if (*p == separator) ++p;
910 return false; /* error */
912 /* *p is '=', extract value */
914 while (ISSPACE (*p)) ++p;
915 if (*p == '"') /* quoted */
918 while (*p && *p != '"') ++p;
922 /* Currently at closing quote; find the end of param. */
923 while (ISSPACE (*p)) ++p;
924 while (*p && *p != separator) ++p;
928 /* garbage after closed quote, e.g. foo="bar"baz */
934 while (*p && *p != separator) ++p;
936 while (value->e != value->b && ISSPACE (value->e[-1]))
938 if (*p == separator) ++p;
945 #define MAX(p, q) ((p) > (q) ? (p) : (q))
947 /* Parse the contents of the `Content-Disposition' header, extracting
948 the information useful to Wget. Content-Disposition is a header
949 borrowed from MIME; when used in HTTP, it typically serves for
950 specifying the desired file name of the resource. For example:
952 Content-Disposition: attachment; filename="flora.jpg"
954 Wget will skip the tokens it doesn't care about, such as
955 "attachment" in the previous example; it will also skip other
956 unrecognized params. If the header is syntactically correct and
957 contains a file name, a copy of the file name is stored in
958 *filename and true is returned. Otherwise, the function returns
961 The file name is stripped of directory components and must not be
965 parse_content_disposition (const char *hdr, char **filename)
967 param_token name, value;
968 while (extract_param (&hdr, &name, &value, ';'))
969 if (BOUNDED_EQUAL_NO_CASE (name.b, name.e, "filename") && value.b != NULL)
971 /* Make the file name begin at the last slash or backslash. */
972 const char *last_slash = memrchr (value.b, '/', value.e - value.b);
973 const char *last_bs = memrchr (value.b, '\\', value.e - value.b);
974 if (last_slash && last_bs)
975 value.b = 1 + MAX (last_slash, last_bs);
976 else if (last_slash || last_bs)
977 value.b = 1 + (last_slash ? last_slash : last_bs);
978 if (value.b == value.e)
980 /* Start with the directory prefix, if specified. */
983 int prefix_length = strlen (opt.dir_prefix);
984 bool add_slash = (opt.dir_prefix[prefix_length - 1] != '/');
989 total_length = prefix_length + (value.e - value.b);
990 *filename = xmalloc (total_length + 1);
991 strcpy (*filename, opt.dir_prefix);
993 (*filename)[prefix_length - 1] = '/';
994 memcpy (*filename + prefix_length, value.b, (value.e - value.b));
995 (*filename)[total_length] = '\0';
998 *filename = strdupdelim (value.b, value.e);
1004 /* Persistent connections. Currently, we cache the most recently used
1005 connection as persistent, provided that the HTTP server agrees to
1006 make it such. The persistence data is stored in the variables
1007 below. Ideally, it should be possible to cache an arbitrary fixed
1008 number of these connections. */
1010 /* Whether a persistent connection is active. */
1011 static bool pconn_active;
1014 /* The socket of the connection. */
1017 /* Host and port of the currently active persistent connection. */
1021 /* Whether a ssl handshake has occoured on this connection. */
1024 /* Whether the connection was authorized. This is only done by
1025 NTLM, which authorizes *connections* rather than individual
1026 requests. (That practice is peculiar for HTTP, but it is a
1027 useful optimization.) */
1031 /* NTLM data of the current connection. */
1032 struct ntlmdata ntlm;
1036 /* Mark the persistent connection as invalid and free the resources it
1037 uses. This is used by the CLOSE_* macros after they forcefully
1038 close a registered persistent connection. */
1041 invalidate_persistent (void)
1043 DEBUGP (("Disabling further reuse of socket %d.\n", pconn.socket));
1044 pconn_active = false;
1045 fd_close (pconn.socket);
1050 /* Register FD, which should be a TCP/IP connection to HOST:PORT, as
1051 persistent. This will enable someone to use the same connection
1052 later. In the context of HTTP, this must be called only AFTER the
1053 response has been received and the server has promised that the
1054 connection will remain alive.
1056 If a previous connection was persistent, it is closed. */
1059 register_persistent (const char *host, int port, int fd, bool ssl)
1063 if (pconn.socket == fd)
1065 /* The connection FD is already registered. */
1070 /* The old persistent connection is still active; close it
1071 first. This situation arises whenever a persistent
1072 connection exists, but we then connect to a different
1073 host, and try to register a persistent connection to that
1075 invalidate_persistent ();
1079 pconn_active = true;
1081 pconn.host = xstrdup (host);
1084 pconn.authorized = false;
1086 DEBUGP (("Registered socket %d for persistent reuse.\n", fd));
1089 /* Return true if a persistent connection is available for connecting
1093 persistent_available_p (const char *host, int port, bool ssl,
1094 bool *host_lookup_failed)
1096 /* First, check whether a persistent connection is active at all. */
1100 /* If we want SSL and the last connection wasn't or vice versa,
1101 don't use it. Checking for host and port is not enough because
1102 HTTP and HTTPS can apparently coexist on the same port. */
1103 if (ssl != pconn.ssl)
1106 /* If we're not connecting to the same port, we're not interested. */
1107 if (port != pconn.port)
1110 /* If the host is the same, we're in business. If not, there is
1111 still hope -- read below. */
1112 if (0 != strcasecmp (host, pconn.host))
1114 /* Check if pconn.socket is talking to HOST under another name.
1115 This happens often when both sites are virtual hosts
1116 distinguished only by name and served by the same network
1117 interface, and hence the same web server (possibly set up by
1118 the ISP and serving many different web sites). This
1119 admittedly unconventional optimization does not contradict
1120 HTTP and works well with popular server software. */
1124 struct address_list *al;
1127 /* Don't try to talk to two different SSL sites over the same
1128 secure connection! (Besides, it's not clear that
1129 name-based virtual hosting is even possible with SSL.) */
1132 /* If pconn.socket's peer is one of the IP addresses HOST
1133 resolves to, pconn.socket is for all intents and purposes
1134 already talking to HOST. */
1136 if (!socket_ip_address (pconn.socket, &ip, ENDPOINT_PEER))
1138 /* Can't get the peer's address -- something must be very
1139 wrong with the connection. */
1140 invalidate_persistent ();
1143 al = lookup_host (host, 0);
1146 *host_lookup_failed = true;
1150 found = address_list_contains (al, &ip);
1151 address_list_release (al);
1156 /* The persistent connection's peer address was found among the
1157 addresses HOST resolved to; therefore, pconn.sock is in fact
1158 already talking to HOST -- no need to reconnect. */
1161 /* Finally, check whether the connection is still open. This is
1162 important because most servers implement liberal (short) timeout
1163 on persistent connections. Wget can of course always reconnect
1164 if the connection doesn't work out, but it's nicer to know in
1165 advance. This test is a logical followup of the first test, but
1166 is "expensive" and therefore placed at the end of the list.
1168 (Current implementation of test_socket_open has a nice side
1169 effect that it treats sockets with pending data as "closed".
1170 This is exactly what we want: if a broken server sends message
1171 body in response to HEAD, or if it sends more than conent-length
1172 data, we won't reuse the corrupted connection.) */
1174 if (!test_socket_open (pconn.socket))
1176 /* Oops, the socket is no longer open. Now that we know that,
1177 let's invalidate the persistent connection before returning
1179 invalidate_persistent ();
1186 /* The idea behind these two CLOSE macros is to distinguish between
1187 two cases: one when the job we've been doing is finished, and we
1188 want to close the connection and leave, and two when something is
1189 seriously wrong and we're closing the connection as part of
1192 In case of keep_alive, CLOSE_FINISH should leave the connection
1193 open, while CLOSE_INVALIDATE should still close it.
1195 Note that the semantics of the flag `keep_alive' is "this
1196 connection *will* be reused (the server has promised not to close
1197 the connection once we're done)", while the semantics of
1198 `pc_active_p && (fd) == pc_last_fd' is "we're *now* using an
1199 active, registered connection". */
1201 #define CLOSE_FINISH(fd) do { \
1204 if (pconn_active && (fd) == pconn.socket) \
1205 invalidate_persistent (); \
1214 #define CLOSE_INVALIDATE(fd) do { \
1215 if (pconn_active && (fd) == pconn.socket) \
1216 invalidate_persistent (); \
1224 wgint len; /* received length */
1225 wgint contlen; /* expected length */
1226 wgint restval; /* the restart value */
1227 int res; /* the result of last read */
1228 char *rderrmsg; /* error message from read error */
1229 char *newloc; /* new location (redirection) */
1230 char *remote_time; /* remote time-stamp string */
1231 char *error; /* textual HTTP error */
1232 int statcode; /* status code */
1233 wgint rd_size; /* amount of data read from socket */
1234 double dltime; /* time it took to download the data */
1235 const char *referer; /* value of the referer header. */
1236 char *local_file; /* local file name. */
1237 bool timestamp_checked; /* true if pre-download time-stamping checks
1238 * have already been performed */
1239 char *orig_file_name; /* name of file to compare for time-stamping
1240 * (might be != local_file if -K is set) */
1241 wgint orig_file_size; /* size of file to compare for time-stamping */
1242 time_t orig_file_tstamp; /* time-stamp of file to compare for
1247 free_hstat (struct http_stat *hs)
1249 xfree_null (hs->newloc);
1250 xfree_null (hs->remote_time);
1251 xfree_null (hs->error);
1252 xfree_null (hs->rderrmsg);
1253 xfree_null (hs->local_file);
1254 xfree_null (hs->orig_file_name);
1256 /* Guard against being called twice. */
1258 hs->remote_time = NULL;
1262 static char *create_authorization_line (const char *, const char *,
1263 const char *, const char *,
1264 const char *, bool *);
1265 static char *basic_authentication_encode (const char *, const char *);
1266 static bool known_authentication_scheme_p (const char *, const char *);
1267 static void load_cookies (void);
1269 #define BEGINS_WITH(line, string_constant) \
1270 (!strncasecmp (line, string_constant, sizeof (string_constant) - 1) \
1271 && (ISSPACE (line[sizeof (string_constant) - 1]) \
1272 || !line[sizeof (string_constant) - 1]))
1274 #define SET_USER_AGENT(req) do { \
1275 if (!opt.useragent) \
1276 request_set_header (req, "User-Agent", \
1277 aprintf ("Wget/%s", version_string), rel_value); \
1278 else if (*opt.useragent) \
1279 request_set_header (req, "User-Agent", opt.useragent, rel_none); \
1282 /* The flags that allow clobbering the file (opening with "wb").
1283 Defined here to avoid repetition later. #### This will require
1285 #define ALLOW_CLOBBER (opt.noclobber || opt.always_rest || opt.timestamping \
1286 || opt.dirstruct || opt.output_document)
1288 /* Retrieve a document through HTTP protocol. It recognizes status
1289 code, and correctly handles redirections. It closes the network
1290 socket. If it receives an error from the functions below it, it
1291 will print it if there is enough information to do so (almost
1292 always), returning the error to the caller (i.e. http_loop).
1294 Various HTTP parameters are stored to hs.
1296 If PROXY is non-NULL, the connection will be made to the proxy
1297 server, and u->url will be requested. */
1299 gethttp (struct url *u, struct http_stat *hs, int *dt, struct url *proxy)
1301 struct request *req;
1304 char *user, *passwd;
1308 wgint contlen, contrange;
1315 /* Set to 1 when the authorization has failed permanently and should
1316 not be tried again. */
1317 bool auth_finished = false;
1319 /* Whether NTLM authentication is used for this request. */
1320 bool ntlm_seen = false;
1322 /* Whether our connection to the remote host is through SSL. */
1323 bool using_ssl = false;
1325 /* Whether a HEAD request will be issued (as opposed to GET or
1327 bool head_only = !!(*dt & HEAD_ONLY);
1330 struct response *resp;
1334 /* Whether this connection will be kept alive after the HTTP request
1338 /* Whether keep-alive should be inhibited.
1340 RFC 2068 requests that 1.0 clients not send keep-alive requests
1341 to proxies. This is because many 1.0 proxies do not interpret
1342 the Connection header and transfer it to the remote server,
1343 causing it to not close the connection and leave both the proxy
1344 and the client hanging. */
1345 bool inhibit_keep_alive =
1346 !opt.http_keep_alive || opt.ignore_length || proxy != NULL;
1348 /* Headers sent when using POST. */
1349 wgint post_data_size = 0;
1351 bool host_lookup_failed = false;
1354 if (u->scheme == SCHEME_HTTPS)
1356 /* Initialize the SSL context. After this has once been done,
1357 it becomes a no-op. */
1360 scheme_disable (SCHEME_HTTPS);
1361 logprintf (LOG_NOTQUIET,
1362 _("Disabling SSL due to encountered errors.\n"));
1363 return SSLINITFAILED;
1366 #endif /* HAVE_SSL */
1368 /* Initialize certain elements of struct http_stat. */
1372 hs->rderrmsg = NULL;
1374 hs->remote_time = NULL;
1379 /* Prepare the request to send. */
1381 req = request_new ();
1384 const char *meth = "GET";
1387 else if (opt.post_file_name || opt.post_data)
1389 /* Use the full path, i.e. one that includes the leading slash and
1390 the query string. E.g. if u->path is "foo/bar" and u->query is
1391 "param=value", full_path will be "/foo/bar?param=value". */
1394 /* When using SSL over proxy, CONNECT establishes a direct
1395 connection to the HTTPS server. Therefore use the same
1396 argument as when talking to the server directly. */
1397 && u->scheme != SCHEME_HTTPS
1400 meth_arg = xstrdup (u->url);
1402 meth_arg = url_full_path (u);
1403 request_set_method (req, meth, meth_arg);
1406 request_set_header (req, "Referer", (char *) hs->referer, rel_none);
1407 if (*dt & SEND_NOCACHE)
1408 request_set_header (req, "Pragma", "no-cache", rel_none);
1410 request_set_header (req, "Range",
1411 aprintf ("bytes=%s-",
1412 number_to_static_string (hs->restval)),
1414 SET_USER_AGENT (req);
1415 request_set_header (req, "Accept", "*/*", rel_none);
1417 /* Find the username and password for authentication. */
1420 search_netrc (u->host, (const char **)&user, (const char **)&passwd, 0);
1421 user = user ? user : (opt.http_user ? opt.http_user : opt.user);
1422 passwd = passwd ? passwd : (opt.http_passwd ? opt.http_passwd : opt.passwd);
1426 /* We have the username and the password, but haven't tried
1427 any authorization yet. Let's see if the "Basic" method
1428 works. If not, we'll come back here and construct a
1429 proper authorization method with the right challenges.
1431 If we didn't employ this kind of logic, every URL that
1432 requires authorization would have to be processed twice,
1433 which is very suboptimal and generates a bunch of false
1434 "unauthorized" errors in the server log.
1436 #### But this logic also has a serious problem when used
1437 with stronger authentications: we *first* transmit the
1438 username and the password in clear text, and *then* attempt a
1439 stronger authentication scheme. That cannot be right! We
1440 are only fortunate that almost everyone still uses the
1441 `Basic' scheme anyway.
1443 There should be an option to prevent this from happening, for
1444 those who use strong authentication schemes and value their
1446 request_set_header (req, "Authorization",
1447 basic_authentication_encode (user, passwd),
1454 char *proxy_user, *proxy_passwd;
1455 /* For normal username and password, URL components override
1456 command-line/wgetrc parameters. With proxy
1457 authentication, it's the reverse, because proxy URLs are
1458 normally the "permanent" ones, so command-line args
1459 should take precedence. */
1460 if (opt.proxy_user && opt.proxy_passwd)
1462 proxy_user = opt.proxy_user;
1463 proxy_passwd = opt.proxy_passwd;
1467 proxy_user = proxy->user;
1468 proxy_passwd = proxy->passwd;
1470 /* #### This does not appear right. Can't the proxy request,
1471 say, `Digest' authentication? */
1472 if (proxy_user && proxy_passwd)
1473 proxyauth = basic_authentication_encode (proxy_user, proxy_passwd);
1475 /* If we're using a proxy, we will be connecting to the proxy
1479 /* Proxy authorization over SSL is handled below. */
1481 if (u->scheme != SCHEME_HTTPS)
1483 request_set_header (req, "Proxy-Authorization", proxyauth, rel_value);
1486 /* Generate the Host header, HOST:PORT. Take into account that:
1488 - Broken server-side software often doesn't recognize the PORT
1489 argument, so we must generate "Host: www.server.com" instead of
1490 "Host: www.server.com:80" (and likewise for https port).
1492 - IPv6 addresses contain ":", so "Host: 3ffe:8100:200:2::2:1234"
1493 becomes ambiguous and needs to be rewritten as "Host:
1494 [3ffe:8100:200:2::2]:1234". */
1496 /* Formats arranged for hfmt[add_port][add_squares]. */
1497 static const char *hfmt[][2] = {
1498 { "%s", "[%s]" }, { "%s:%d", "[%s]:%d" }
1500 int add_port = u->port != scheme_default_port (u->scheme);
1501 int add_squares = strchr (u->host, ':') != NULL;
1502 request_set_header (req, "Host",
1503 aprintf (hfmt[add_port][add_squares], u->host, u->port),
1507 if (!inhibit_keep_alive)
1508 request_set_header (req, "Connection", "Keep-Alive", rel_none);
1511 request_set_header (req, "Cookie",
1512 cookie_header (wget_cookie_jar,
1513 u->host, u->port, u->path,
1515 u->scheme == SCHEME_HTTPS
1522 if (opt.post_data || opt.post_file_name)
1524 request_set_header (req, "Content-Type",
1525 "application/x-www-form-urlencoded", rel_none);
1527 post_data_size = strlen (opt.post_data);
1530 post_data_size = file_size (opt.post_file_name);
1531 if (post_data_size == -1)
1533 logprintf (LOG_NOTQUIET, _("POST data file `%s' missing: %s\n"),
1534 opt.post_file_name, strerror (errno));
1538 request_set_header (req, "Content-Length",
1539 xstrdup (number_to_static_string (post_data_size)),
1543 /* Add the user headers. */
1544 if (opt.user_headers)
1547 for (i = 0; opt.user_headers[i]; i++)
1548 request_set_user_header (req, opt.user_headers[i]);
1552 /* We need to come back here when the initial attempt to retrieve
1553 without authorization header fails. (Expected to happen at least
1554 for the Digest authorization scheme.) */
1558 /* Establish the connection. */
1560 if (!inhibit_keep_alive)
1562 /* Look for a persistent connection to target host, unless a
1563 proxy is used. The exception is when SSL is in use, in which
1564 case the proxy is nothing but a passthrough to the target
1565 host, registered as a connection to the latter. */
1566 struct url *relevant = conn;
1568 if (u->scheme == SCHEME_HTTPS)
1572 if (persistent_available_p (relevant->host, relevant->port,
1574 relevant->scheme == SCHEME_HTTPS,
1578 &host_lookup_failed))
1580 sock = pconn.socket;
1581 using_ssl = pconn.ssl;
1582 logprintf (LOG_VERBOSE, _("Reusing existing connection to %s:%d.\n"),
1583 escnonprint (pconn.host), pconn.port);
1584 DEBUGP (("Reusing fd %d.\n", sock));
1585 if (pconn.authorized)
1586 /* If the connection is already authorized, the "Basic"
1587 authorization added by code above is unnecessary and
1589 request_remove_header (req, "Authorization");
1595 /* In its current implementation, persistent_available_p will
1596 look up conn->host in some cases. If that lookup failed, we
1597 don't need to bother with connect_to_host. */
1598 if (host_lookup_failed)
1604 sock = connect_to_host (conn->host, conn->port);
1613 return (retryable_socket_connect_error (errno)
1614 ? CONERROR : CONIMPOSSIBLE);
1618 if (proxy && u->scheme == SCHEME_HTTPS)
1620 /* When requesting SSL URLs through proxies, use the
1621 CONNECT method to request passthrough. */
1622 struct request *connreq = request_new ();
1623 request_set_method (connreq, "CONNECT",
1624 aprintf ("%s:%d", u->host, u->port));
1625 SET_USER_AGENT (connreq);
1628 request_set_header (connreq, "Proxy-Authorization",
1629 proxyauth, rel_value);
1630 /* Now that PROXYAUTH is part of the CONNECT request,
1631 zero it out so we don't send proxy authorization with
1632 the regular request below. */
1635 /* Examples in rfc2817 use the Host header in CONNECT
1636 requests. I don't see how that gains anything, given
1637 that the contents of Host would be exactly the same as
1638 the contents of CONNECT. */
1640 write_error = request_send (connreq, sock);
1641 request_free (connreq);
1642 if (write_error < 0)
1644 CLOSE_INVALIDATE (sock);
1648 head = read_http_response_head (sock);
1651 logprintf (LOG_VERBOSE, _("Failed reading proxy response: %s\n"),
1653 CLOSE_INVALIDATE (sock);
1662 DEBUGP (("proxy responded with: [%s]\n", head));
1664 resp = resp_new (head);
1665 statcode = resp_status (resp, &message);
1668 if (statcode != 200)
1671 logprintf (LOG_NOTQUIET, _("Proxy tunneling failed: %s"),
1672 message ? escnonprint (message) : "?");
1673 xfree_null (message);
1676 xfree_null (message);
1678 /* SOCK is now *really* connected to u->host, so update CONN
1679 to reflect this. That way register_persistent will
1680 register SOCK as being connected to u->host:u->port. */
1684 if (conn->scheme == SCHEME_HTTPS)
1686 if (!ssl_connect (sock) || !ssl_check_certificate (sock, u->host))
1693 #endif /* HAVE_SSL */
1696 /* Send the request to server. */
1697 write_error = request_send (req, sock);
1699 if (write_error >= 0)
1703 DEBUGP (("[POST data: %s]\n", opt.post_data));
1704 write_error = fd_write (sock, opt.post_data, post_data_size, -1);
1706 else if (opt.post_file_name && post_data_size != 0)
1707 write_error = post_file (sock, opt.post_file_name, post_data_size);
1710 if (write_error < 0)
1712 CLOSE_INVALIDATE (sock);
1716 logprintf (LOG_VERBOSE, _("%s request sent, awaiting response... "),
1717 proxy ? "Proxy" : "HTTP");
1722 head = read_http_response_head (sock);
1727 logputs (LOG_NOTQUIET, _("No data received.\n"));
1728 CLOSE_INVALIDATE (sock);
1734 logprintf (LOG_NOTQUIET, _("Read error (%s) in headers.\n"),
1736 CLOSE_INVALIDATE (sock);
1741 DEBUGP (("\n---response begin---\n%s---response end---\n", head));
1743 resp = resp_new (head);
1745 /* Check for status line. */
1747 statcode = resp_status (resp, &message);
1748 if (!opt.server_response)
1749 logprintf (LOG_VERBOSE, "%2d %s\n", statcode,
1750 message ? escnonprint (message) : "");
1753 logprintf (LOG_VERBOSE, "\n");
1754 print_server_response (resp, " ");
1757 /* Determine the local filename if needed. Notice that if -O is used
1758 * hstat.local_file is set by http_loop to the argument of -O. */
1759 if (!hs->local_file)
1761 /* Honor Content-Disposition whether possible. */
1762 if (!opt.content_disposition
1763 || !resp_header_copy (resp, "Content-Disposition",
1764 hdrval, sizeof (hdrval))
1765 || !parse_content_disposition (hdrval, &hs->local_file))
1767 /* The Content-Disposition header is missing or broken.
1768 * Choose unique file name according to given URL. */
1769 hs->local_file = url_file_name (u);
1773 /* TODO: perform this check only once. */
1774 if (file_exists_p (hs->local_file))
1778 /* If opt.noclobber is turned on and file already exists, do not
1779 retrieve the file */
1780 logprintf (LOG_VERBOSE, _("\
1781 File `%s' already there; not retrieving.\n\n"), hs->local_file);
1782 /* If the file is there, we suppose it's retrieved OK. */
1785 /* #### Bogusness alert. */
1786 /* If its suffix is "html" or "htm" or similar, assume text/html. */
1787 if (has_html_suffix_p (hs->local_file))
1792 else if (!ALLOW_CLOBBER)
1794 char *unique = unique_name (hs->local_file, true);
1795 if (unique != hs->local_file)
1796 xfree (hs->local_file);
1797 hs->local_file = unique;
1801 /* Support timestamping */
1802 /* TODO: move this code out of gethttp. */
1803 if (opt.timestamping && !hs->timestamp_checked)
1805 size_t filename_len = strlen (hs->local_file);
1806 char *filename_plus_orig_suffix = alloca (filename_len + sizeof (".orig"));
1807 bool local_dot_orig_file_exists = false;
1808 char *local_filename = NULL;
1811 if (opt.backup_converted)
1812 /* If -K is specified, we'll act on the assumption that it was specified
1813 last time these files were downloaded as well, and instead of just
1814 comparing local file X against server file X, we'll compare local
1815 file X.orig (if extant, else X) against server file X. If -K
1816 _wasn't_ specified last time, or the server contains files called
1817 *.orig, -N will be back to not operating correctly with -k. */
1819 /* Would a single s[n]printf() call be faster? --dan
1821 Definitely not. sprintf() is horribly slow. It's a
1822 different question whether the difference between the two
1823 affects a program. Usually I'd say "no", but at one
1824 point I profiled Wget, and found that a measurable and
1825 non-negligible amount of time was lost calling sprintf()
1826 in url.c. Replacing sprintf with inline calls to
1827 strcpy() and number_to_string() made a difference.
1829 memcpy (filename_plus_orig_suffix, hs->local_file, filename_len);
1830 memcpy (filename_plus_orig_suffix + filename_len,
1831 ".orig", sizeof (".orig"));
1833 /* Try to stat() the .orig file. */
1834 if (stat (filename_plus_orig_suffix, &st) == 0)
1836 local_dot_orig_file_exists = true;
1837 local_filename = filename_plus_orig_suffix;
1841 if (!local_dot_orig_file_exists)
1842 /* Couldn't stat() <file>.orig, so try to stat() <file>. */
1843 if (stat (hs->local_file, &st) == 0)
1844 local_filename = hs->local_file;
1846 if (local_filename != NULL)
1847 /* There was a local file, so we'll check later to see if the version
1848 the server has is the same version we already have, allowing us to
1851 hs->orig_file_name = xstrdup (local_filename);
1852 hs->orig_file_size = st.st_size;
1853 hs->orig_file_tstamp = st.st_mtime;
1855 /* Modification time granularity is 2 seconds for Windows, so
1856 increase local time by 1 second for later comparison. */
1857 ++hs->orig_file_tstamp;
1862 if (!opt.ignore_length
1863 && resp_header_copy (resp, "Content-Length", hdrval, sizeof (hdrval)))
1867 parsed = str_to_wgint (hdrval, NULL, 10);
1868 if (parsed == WGINT_MAX && errno == ERANGE)
1870 #### If Content-Length is out of range, it most likely
1871 means that the file is larger than 2G and that we're
1872 compiled without LFS. In that case we should probably
1873 refuse to even attempt to download the file. */
1879 /* Check for keep-alive related responses. */
1880 if (!inhibit_keep_alive && contlen != -1)
1882 if (resp_header_copy (resp, "Keep-Alive", NULL, 0))
1884 else if (resp_header_copy (resp, "Connection", hdrval, sizeof (hdrval)))
1886 if (0 == strcasecmp (hdrval, "Keep-Alive"))
1891 /* The server has promised that it will not close the connection
1892 when we're done. This means that we can register it. */
1893 register_persistent (conn->host, conn->port, sock, using_ssl);
1895 if (statcode == HTTP_STATUS_UNAUTHORIZED)
1897 /* Authorization is required. */
1898 if (keep_alive && !head_only && skip_short_body (sock, contlen))
1899 CLOSE_FINISH (sock);
1901 CLOSE_INVALIDATE (sock);
1902 pconn.authorized = false;
1903 if (!auth_finished && (user && passwd))
1905 /* IIS sends multiple copies of WWW-Authenticate, one with
1906 the value "negotiate", and other(s) with data. Loop over
1907 all the occurrences and pick the one we recognize. */
1909 const char *wabeg, *waend;
1910 char *www_authenticate = NULL;
1912 (wapos = resp_header_locate (resp, "WWW-Authenticate", wapos,
1913 &wabeg, &waend)) != -1;
1915 if (known_authentication_scheme_p (wabeg, waend))
1917 BOUNDED_TO_ALLOCA (wabeg, waend, www_authenticate);
1921 if (!www_authenticate)
1922 /* If the authentication header is missing or
1923 unrecognized, there's no sense in retrying. */
1924 logputs (LOG_NOTQUIET, _("Unknown authentication scheme.\n"));
1925 else if (BEGINS_WITH (www_authenticate, "Basic"))
1926 /* If the authentication scheme is "Basic", which we send
1927 by default, there's no sense in retrying either. (This
1928 should be changed when we stop sending "Basic" data by
1934 pth = url_full_path (u);
1935 request_set_header (req, "Authorization",
1936 create_authorization_line (www_authenticate,
1938 request_method (req),
1942 if (BEGINS_WITH (www_authenticate, "NTLM"))
1945 goto retry_with_auth;
1948 logputs (LOG_NOTQUIET, _("Authorization failed.\n"));
1952 else /* statcode != HTTP_STATUS_UNAUTHORIZED */
1954 /* Kludge: if NTLM is used, mark the TCP connection as authorized. */
1956 pconn.authorized = true;
1960 hs->statcode = statcode;
1962 hs->error = xstrdup (_("Malformed status line"));
1964 hs->error = xstrdup (_("(no description)"));
1966 hs->error = xstrdup (message);
1967 xfree_null (message);
1969 type = resp_header_strdup (resp, "Content-Type");
1972 char *tmp = strchr (type, ';');
1975 while (tmp > type && ISSPACE (tmp[-1]))
1980 hs->newloc = resp_header_strdup (resp, "Location");
1981 hs->remote_time = resp_header_strdup (resp, "Last-Modified");
1983 /* Handle (possibly multiple instances of) the Set-Cookie header. */
1987 const char *scbeg, *scend;
1988 /* The jar should have been created by now. */
1989 assert (wget_cookie_jar != NULL);
1991 (scpos = resp_header_locate (resp, "Set-Cookie", scpos,
1992 &scbeg, &scend)) != -1;
1995 char *set_cookie; BOUNDED_TO_ALLOCA (scbeg, scend, set_cookie);
1996 cookie_handle_set_cookie (wget_cookie_jar, u->host, u->port,
1997 u->path, set_cookie);
2001 if (resp_header_copy (resp, "Content-Range", hdrval, sizeof (hdrval)))
2003 wgint first_byte_pos, last_byte_pos, entity_length;
2004 if (parse_content_range (hdrval, &first_byte_pos, &last_byte_pos,
2006 contrange = first_byte_pos;
2010 /* 20x responses are counted among successful by default. */
2011 if (H_20X (statcode))
2014 /* Return if redirected. */
2015 if (H_REDIRECTED (statcode) || statcode == HTTP_STATUS_MULTIPLE_CHOICES)
2017 /* RFC2068 says that in case of the 300 (multiple choices)
2018 response, the server can output a preferred URL through
2019 `Location' header; otherwise, the request should be treated
2020 like GET. So, if the location is set, it will be a
2021 redirection; otherwise, just proceed normally. */
2022 if (statcode == HTTP_STATUS_MULTIPLE_CHOICES && !hs->newloc)
2026 logprintf (LOG_VERBOSE,
2027 _("Location: %s%s\n"),
2028 hs->newloc ? escnonprint_uri (hs->newloc) : _("unspecified"),
2029 hs->newloc ? _(" [following]") : "");
2030 if (keep_alive && !head_only && skip_short_body (sock, contlen))
2031 CLOSE_FINISH (sock);
2033 CLOSE_INVALIDATE (sock);
2039 /* If content-type is not given, assume text/html. This is because
2040 of the multitude of broken CGI's that "forget" to generate the
2043 0 == strncasecmp (type, TEXTHTML_S, strlen (TEXTHTML_S)) ||
2044 0 == strncasecmp (type, TEXTXHTML_S, strlen (TEXTXHTML_S)))
2049 if (opt.html_extension && (*dt & TEXTHTML))
2050 /* -E / --html-extension / html_extension = on was specified, and this is a
2051 text/html file. If some case-insensitive variation on ".htm[l]" isn't
2052 already the file's suffix, tack on ".html". */
2054 char *last_period_in_local_filename = strrchr (hs->local_file, '.');
2056 if (last_period_in_local_filename == NULL
2057 || !(0 == strcasecmp (last_period_in_local_filename, ".htm")
2058 || 0 == strcasecmp (last_period_in_local_filename, ".html")))
2060 int local_filename_len = strlen (hs->local_file);
2061 /* Resize the local file, allowing for ".html" preceded by
2062 optional ".NUMBER". */
2063 hs->local_file = xrealloc (hs->local_file,
2064 local_filename_len + 24 + sizeof (".html"));
2065 strcpy(hs->local_file + local_filename_len, ".html");
2066 /* If clobbering is not allowed and the file, as named,
2067 exists, tack on ".NUMBER.html" instead. */
2068 if (!ALLOW_CLOBBER && file_exists_p (hs->local_file))
2072 sprintf (hs->local_file + local_filename_len,
2073 ".%d.html", ext_num++);
2074 while (file_exists_p (hs->local_file));
2076 *dt |= ADDED_HTML_EXTENSION;
2080 if (statcode == HTTP_STATUS_RANGE_NOT_SATISFIABLE)
2082 /* If `-c' is in use and the file has been fully downloaded (or
2083 the remote file has shrunk), Wget effectively requests bytes
2084 after the end of file and the server response with 416. */
2085 logputs (LOG_VERBOSE, _("\
2086 \n The file is already fully retrieved; nothing to do.\n\n"));
2087 /* In case the caller inspects. */
2090 /* Mark as successfully retrieved. */
2093 CLOSE_INVALIDATE (sock); /* would be CLOSE_FINISH, but there
2094 might be more bytes in the body. */
2095 return RETRUNNEEDED;
2097 if ((contrange != 0 && contrange != hs->restval)
2098 || (H_PARTIAL (statcode) && !contrange))
2100 /* The Range request was somehow misunderstood by the server.
2103 CLOSE_INVALIDATE (sock);
2106 hs->contlen = contlen + contrange;
2112 /* No need to print this output if the body won't be
2113 downloaded at all, or if the original server response is
2115 logputs (LOG_VERBOSE, _("Length: "));
2118 logputs (LOG_VERBOSE, number_to_static_string (contlen + contrange));
2119 if (contlen + contrange >= 1024)
2120 logprintf (LOG_VERBOSE, " (%s)",
2121 human_readable (contlen + contrange));
2124 if (contlen >= 1024)
2125 logprintf (LOG_VERBOSE, _(", %s (%s) remaining"),
2126 number_to_static_string (contlen),
2127 human_readable (contlen));
2129 logprintf (LOG_VERBOSE, _(", %s remaining"),
2130 number_to_static_string (contlen));
2134 logputs (LOG_VERBOSE,
2135 opt.ignore_length ? _("ignored") : _("unspecified"));
2137 logprintf (LOG_VERBOSE, " [%s]\n", escnonprint (type));
2139 logputs (LOG_VERBOSE, "\n");
2143 type = NULL; /* We don't need it any more. */
2145 /* Return if we have no intention of further downloading. */
2146 if (!(*dt & RETROKF) || head_only)
2148 /* In case the caller cares to look... */
2153 /* Pre-1.10 Wget used CLOSE_INVALIDATE here. Now we trust the
2154 servers not to send body in response to a HEAD request, and
2155 those that do will likely be caught by test_socket_open.
2156 If not, they can be worked around using
2157 `--no-http-keep-alive'. */
2158 CLOSE_FINISH (sock);
2159 else if (keep_alive && skip_short_body (sock, contlen))
2160 /* Successfully skipped the body; also keep using the socket. */
2161 CLOSE_FINISH (sock);
2163 CLOSE_INVALIDATE (sock);
2164 return RETRFINISHED;
2167 /* Open the local file. */
2170 mkalldirs (hs->local_file);
2172 rotate_backups (hs->local_file);
2174 fp = fopen (hs->local_file, "ab");
2175 else if (ALLOW_CLOBBER)
2176 fp = fopen (hs->local_file, "wb");
2179 fp = fopen_excl (hs->local_file, true);
2180 if (!fp && errno == EEXIST)
2182 /* We cannot just invent a new name and use it (which is
2183 what functions like unique_create typically do)
2184 because we told the user we'd use this name.
2185 Instead, return and retry the download. */
2186 logprintf (LOG_NOTQUIET,
2187 _("%s has sprung into existence.\n"),
2189 CLOSE_INVALIDATE (sock);
2190 return FOPEN_EXCL_ERR;
2195 logprintf (LOG_NOTQUIET, "%s: %s\n", hs->local_file, strerror (errno));
2196 CLOSE_INVALIDATE (sock);
2203 /* Print fetch message, if opt.verbose. */
2206 logprintf (LOG_NOTQUIET, _("Saving to: `%s'\n"),
2207 HYPHENP (hs->local_file) ? "STDOUT" : hs->local_file);
2210 /* This confuses the timestamping code that checks for file size.
2211 #### The timestamping code should be smarter about file size. */
2212 if (opt.save_headers && hs->restval == 0)
2213 fwrite (head, 1, strlen (head), fp);
2215 /* Now we no longer need to store the response header. */
2218 /* Download the request body. */
2221 /* If content-length is present, read that much; otherwise, read
2222 until EOF. The HTTP spec doesn't require the server to
2223 actually close the connection when it's done sending data. */
2224 flags |= rb_read_exactly;
2225 if (hs->restval > 0 && contrange == 0)
2226 /* If the server ignored our range request, instruct fd_read_body
2227 to skip the first RESTVAL bytes of body. */
2228 flags |= rb_skip_startpos;
2229 hs->len = hs->restval;
2231 hs->res = fd_read_body (sock, fp, contlen != -1 ? contlen : 0,
2232 hs->restval, &hs->rd_size, &hs->len, &hs->dltime,
2236 CLOSE_FINISH (sock);
2240 hs->rderrmsg = xstrdup (fd_errstr (sock));
2241 CLOSE_INVALIDATE (sock);
2248 return RETRFINISHED;
2251 /* The genuine HTTP loop! This is the part where the retrieval is
2252 retried, and retried, and retried, and... */
2254 http_loop (struct url *u, char **newloc, char **local_file, const char *referer,
2255 int *dt, struct url *proxy)
2258 bool got_head = false; /* used for time-stamping and filename detection */
2259 bool got_name = false;
2262 uerr_t err, ret = TRYLIMEXC;
2263 time_t tmr = -1; /* remote time-stamp */
2264 wgint local_size = 0; /* the size of the local file */
2265 struct http_stat hstat; /* HTTP status */
2268 /* Assert that no value for *LOCAL_FILE was passed. */
2269 assert (local_file == NULL || *local_file == NULL);
2271 /* Set LOCAL_FILE parameter. */
2272 if (local_file && opt.output_document)
2273 *local_file = HYPHENP (opt.output_document) ? NULL : xstrdup (opt.output_document);
2275 /* Reset NEWLOC parameter. */
2278 /* This used to be done in main(), but it's a better idea to do it
2279 here so that we don't go through the hoops if we're just using
2284 /* Warn on (likely bogus) wildcard usage in HTTP. */
2285 if (opt.ftp_glob && has_wildcards_p (u->path))
2286 logputs (LOG_VERBOSE, _("Warning: wildcards not supported in HTTP.\n"));
2288 /* Setup hstat struct. */
2290 hstat.referer = referer;
2292 if (opt.output_document)
2294 hstat.local_file = xstrdup (opt.output_document);
2298 /* Reset the counter. */
2301 /* Reset the document type. */
2307 /* Increment the pass counter. */
2309 sleep_between_retrievals (count);
2311 /* Get the current time string. */
2312 tms = time_str (time (NULL));
2314 if (opt.spider && !got_head)
2315 logprintf (LOG_VERBOSE, _("\
2316 Spider mode enabled. Check if remote file exists.\n"));
2318 /* Print fetch message, if opt.verbose. */
2321 char *hurl = url_string (u, true);
2326 sprintf (tmp, _("(try:%2d)"), count);
2327 logprintf (LOG_NOTQUIET, "--%s-- %s %s\n",
2332 logprintf (LOG_NOTQUIET, "--%s-- %s\n",
2337 ws_changetitle (hurl);
2342 /* Default document type is empty. However, if spider mode is
2343 on or time-stamping is employed, HEAD_ONLY commands is
2344 encoded within *dt. */
2345 if (((opt.spider || opt.timestamping) && !got_head)
2346 || (opt.always_rest && !got_name))
2351 /* Decide whether or not to restart. */
2354 && stat (hstat.local_file, &st) == 0
2355 && S_ISREG (st.st_mode))
2356 /* When -c is used, continue from on-disk size. (Can't use
2357 hstat.len even if count>1 because we don't want a failed
2358 first attempt to clobber existing data.) */
2359 hstat.restval = st.st_size;
2361 /* otherwise, continue where the previous try left off */
2362 hstat.restval = hstat.len;
2366 /* Decide whether to send the no-cache directive. We send it in
2368 a) we're using a proxy, and we're past our first retrieval.
2369 Some proxies are notorious for caching incomplete data, so
2370 we require a fresh get.
2371 b) caching is explicitly inhibited. */
2372 if ((proxy && count > 1) /* a */
2373 || !opt.allow_cache) /* b */
2374 *dt |= SEND_NOCACHE;
2376 *dt &= ~SEND_NOCACHE;
2378 /* Try fetching the document, or at least its head. */
2379 err = gethttp (u, &hstat, dt, proxy);
2382 tms = time_str (time (NULL));
2384 /* Get the new location (with or without the redirection). */
2386 *newloc = xstrdup (hstat.newloc);
2390 case HERR: case HEOF: case CONSOCKERR: case CONCLOSED:
2391 case CONERROR: case READERR: case WRITEFAILED:
2392 case RANGEERR: case FOPEN_EXCL_ERR:
2393 /* Non-fatal errors continue executing the loop, which will
2394 bring them to "while" statement at the end, to judge
2395 whether the number of tries was exceeded. */
2396 printwhat (count, opt.ntry);
2398 case FWRITEERR: case FOPENERR:
2399 /* Another fatal error. */
2400 logputs (LOG_VERBOSE, "\n");
2401 logprintf (LOG_NOTQUIET, _("Cannot write to `%s' (%s).\n"),
2402 hstat.local_file, strerror (errno));
2403 case HOSTERR: case CONIMPOSSIBLE: case PROXERR: case AUTHFAILED:
2404 case SSLINITFAILED: case CONTNOTSUPPORTED:
2405 /* Fatal errors just return from the function. */
2409 /* Another fatal error. */
2410 logprintf (LOG_NOTQUIET, _("Unable to establish SSL connection.\n"));
2414 /* Return the new location to the caller. */
2417 logprintf (LOG_NOTQUIET,
2418 _("ERROR: Redirection (%d) without location.\n"),
2428 /* The file was already fully retrieved. */
2432 /* Deal with you later. */
2435 /* All possibilities should have been exhausted. */
2439 if (!(*dt & RETROKF))
2444 /* #### Ugly ugly ugly! */
2445 hurl = url_string (u, true);
2446 logprintf (LOG_NONVERBOSE, "%s:\n", hurl);
2448 /* Maybe we should always keep track of broken links, not just in
2452 /* #### Again: ugly ugly ugly! */
2454 hurl = url_string (u, true);
2455 nonexisting_url (hurl);
2456 logprintf (LOG_NOTQUIET, _("\
2457 Remote file does not exist -- broken link!!!\n"));
2461 logprintf (LOG_NOTQUIET, _("%s ERROR %d: %s.\n"),
2462 tms, hstat.statcode, escnonprint (hstat.error));
2464 logputs (LOG_VERBOSE, "\n");
2470 /* Did we get the time-stamp? */
2473 bool restart_loop = false;
2475 if (opt.timestamping && !hstat.remote_time)
2477 logputs (LOG_NOTQUIET, _("\
2478 Last-modified header missing -- time-stamps turned off.\n"));
2480 else if (hstat.remote_time)
2482 /* Convert the date-string into struct tm. */
2483 tmr = http_atotm (hstat.remote_time);
2484 if (tmr == (time_t) (-1))
2485 logputs (LOG_VERBOSE, _("\
2486 Last-modified header invalid -- time-stamp ignored.\n"));
2489 /* The time-stamping section. */
2490 if (opt.timestamping)
2492 if (hstat.orig_file_name) /* Perform the following checks only
2493 if the file we're supposed to
2494 download already exists. */
2496 if (hstat.remote_time &&
2497 tmr != (time_t) (-1))
2499 /* Now time-stamping can be used validly. Time-stamping
2500 means that if the sizes of the local and remote file
2501 match, and local file is newer than the remote file,
2502 it will not be retrieved. Otherwise, the normal
2503 download procedure is resumed. */
2504 if (hstat.orig_file_tstamp >= tmr)
2506 if (hstat.contlen == -1
2507 || hstat.orig_file_size == hstat.contlen)
2509 logprintf (LOG_VERBOSE, _("\
2510 Server file no newer than local file `%s' -- not retrieving.\n\n"),
2511 hstat.orig_file_name);
2517 logprintf (LOG_VERBOSE, _("\
2518 The sizes do not match (local %s) -- retrieving.\n"),
2519 number_to_static_string (local_size));
2523 logputs (LOG_VERBOSE,
2524 _("Remote file is newer, retrieving.\n"));
2526 logputs (LOG_VERBOSE, "\n");
2530 /* free_hstat (&hstat); */
2531 hstat.timestamp_checked = true;
2532 restart_loop = true;
2535 if (opt.always_rest)
2538 restart_loop = true;
2547 logputs (LOG_VERBOSE, _("\
2548 Remote file exists and could contain links to other resources -- retrieving.\n\n"));
2549 restart_loop = true;
2553 logprintf (LOG_VERBOSE, _("\
2554 Remote file exists but does not contain any link -- not retrieving.\n\n"));
2561 logprintf (LOG_VERBOSE, _("\
2562 Remote file exists but recursion is disabled -- not retrieving.\n\n"));
2568 got_head = true; /* no more time-stamping */
2570 count = 0; /* the retrieve count for HEAD is reset */
2576 if ((tmr != (time_t) (-1))
2577 && ((hstat.len == hstat.contlen) ||
2578 ((hstat.res == 0) && (hstat.contlen == -1))))
2580 /* #### This code repeats in http.c and ftp.c. Move it to a
2582 const char *fl = NULL;
2583 if (opt.output_document)
2585 if (output_stream_regular)
2586 fl = opt.output_document;
2589 fl = hstat.local_file;
2593 /* End of time-stamping section. */
2595 tmrate = retr_rate (hstat.rd_size, hstat.dltime);
2596 total_download_time += hstat.dltime;
2598 if (hstat.len == hstat.contlen)
2602 logprintf (LOG_VERBOSE,
2603 _("%s (%s) - `%s' saved [%s/%s]\n\n"),
2604 tms, tmrate, hstat.local_file,
2605 number_to_static_string (hstat.len),
2606 number_to_static_string (hstat.contlen));
2607 logprintf (LOG_NONVERBOSE,
2608 "%s URL:%s [%s/%s] -> \"%s\" [%d]\n",
2610 number_to_static_string (hstat.len),
2611 number_to_static_string (hstat.contlen),
2612 hstat.local_file, count);
2615 total_downloaded_bytes += hstat.len;
2617 /* Remember that we downloaded the file for later ".orig" code. */
2618 if (*dt & ADDED_HTML_EXTENSION)
2619 downloaded_file(FILE_DOWNLOADED_AND_HTML_EXTENSION_ADDED, hstat.local_file);
2621 downloaded_file(FILE_DOWNLOADED_NORMALLY, hstat.local_file);
2626 else if (hstat.res == 0) /* No read error */
2628 if (hstat.contlen == -1) /* We don't know how much we were supposed
2629 to get, so assume we succeeded. */
2633 logprintf (LOG_VERBOSE,
2634 _("%s (%s) - `%s' saved [%s]\n\n"),
2635 tms, tmrate, hstat.local_file,
2636 number_to_static_string (hstat.len));
2637 logprintf (LOG_NONVERBOSE,
2638 "%s URL:%s [%s] -> \"%s\" [%d]\n",
2639 tms, u->url, number_to_static_string (hstat.len),
2640 hstat.local_file, count);
2643 total_downloaded_bytes += hstat.len;
2645 /* Remember that we downloaded the file for later ".orig" code. */
2646 if (*dt & ADDED_HTML_EXTENSION)
2647 downloaded_file(FILE_DOWNLOADED_AND_HTML_EXTENSION_ADDED, hstat.local_file);
2649 downloaded_file(FILE_DOWNLOADED_NORMALLY, hstat.local_file);
2654 else if (hstat.len < hstat.contlen) /* meaning we lost the
2655 connection too soon */
2657 logprintf (LOG_VERBOSE,
2658 _("%s (%s) - Connection closed at byte %s. "),
2659 tms, tmrate, number_to_static_string (hstat.len));
2660 printwhat (count, opt.ntry);
2664 /* Getting here would mean reading more data than
2665 requested with content-length, which we never do. */
2668 else /* from now on hstat.res can only be -1 */
2670 if (hstat.contlen == -1)
2672 logprintf (LOG_VERBOSE,
2673 _("%s (%s) - Read error at byte %s (%s)."),
2674 tms, tmrate, number_to_static_string (hstat.len),
2676 printwhat (count, opt.ntry);
2679 else /* hstat.res == -1 and contlen is given */
2681 logprintf (LOG_VERBOSE,
2682 _("%s (%s) - Read error at byte %s/%s (%s). "),
2684 number_to_static_string (hstat.len),
2685 number_to_static_string (hstat.contlen),
2687 printwhat (count, opt.ntry);
2693 while (!opt.ntry || (count < opt.ntry));
2697 *local_file = xstrdup (hstat.local_file);
2698 free_hstat (&hstat);
2703 /* Check whether the result of strptime() indicates success.
2704 strptime() returns the pointer to how far it got to in the string.
2705 The processing has been successful if the string is at `GMT' or
2706 `+X', or at the end of the string.
2708 In extended regexp parlance, the function returns 1 if P matches
2709 "^ *(GMT|[+-][0-9]|$)", 0 otherwise. P being NULL (which strptime
2710 can return) is considered a failure and 0 is returned. */
2712 check_end (const char *p)
2716 while (ISSPACE (*p))
2719 || (p[0] == 'G' && p[1] == 'M' && p[2] == 'T')
2720 || ((p[0] == '+' || p[0] == '-') && ISDIGIT (p[1])))
2726 /* Convert the textual specification of time in TIME_STRING to the
2727 number of seconds since the Epoch.
2729 TIME_STRING can be in any of the three formats RFC2616 allows the
2730 HTTP servers to emit -- RFC1123-date, RFC850-date or asctime-date,
2731 as well as the time format used in the Set-Cookie header.
2732 Timezones are ignored, and should be GMT.
2734 Return the computed time_t representation, or -1 if the conversion
2737 This function uses strptime with various string formats for parsing
2738 TIME_STRING. This results in a parser that is not as lenient in
2739 interpreting TIME_STRING as I would like it to be. Being based on
2740 strptime, it always allows shortened months, one-digit days, etc.,
2741 but due to the multitude of formats in which time can be
2742 represented, an ideal HTTP time parser would be even more
2743 forgiving. It should completely ignore things like week days and
2744 concentrate only on the various forms of representing years,
2745 months, days, hours, minutes, and seconds. For example, it would
2746 be nice if it accepted ISO 8601 out of the box.
2748 I've investigated free and PD code for this purpose, but none was
2749 usable. getdate was big and unwieldy, and had potential copyright
2750 issues, or so I was informed. Dr. Marcus Hennecke's atotm(),
2751 distributed with phttpd, is excellent, but we cannot use it because
2752 it is not assigned to the FSF. So I stuck it with strptime. */
2755 http_atotm (const char *time_string)
2757 /* NOTE: Solaris strptime man page claims that %n and %t match white
2758 space, but that's not universally available. Instead, we simply
2759 use ` ' to mean "skip all WS", which works under all strptime
2760 implementations I've tested. */
2762 static const char *time_formats[] = {
2763 "%a, %d %b %Y %T", /* rfc1123: Thu, 29 Jan 1998 22:12:57 */
2764 "%A, %d-%b-%y %T", /* rfc850: Thursday, 29-Jan-98 22:12:57 */
2765 "%a %b %d %T %Y", /* asctime: Thu Jan 29 22:12:57 1998 */
2766 "%a, %d-%b-%Y %T" /* cookies: Thu, 29-Jan-1998 22:12:57
2767 (used in Set-Cookie, defined in the
2768 Netscape cookie specification.) */
2770 const char *oldlocale;
2772 time_t ret = (time_t) -1;
2774 /* Solaris strptime fails to recognize English month names in
2775 non-English locales, which we work around by temporarily setting
2776 locale to C before invoking strptime. */
2777 oldlocale = setlocale (LC_TIME, NULL);
2778 setlocale (LC_TIME, "C");
2780 for (i = 0; i < countof (time_formats); i++)
2784 /* Some versions of strptime use the existing contents of struct
2785 tm to recalculate the date according to format. Zero it out
2786 to prevent stack garbage from influencing strptime. */
2789 if (check_end (strptime (time_string, time_formats[i], &t)))
2796 /* Restore the previous locale. */
2797 setlocale (LC_TIME, oldlocale);
2802 /* Authorization support: We support three authorization schemes:
2804 * `Basic' scheme, consisting of base64-ing USER:PASSWORD string;
2806 * `Digest' scheme, added by Junio Hamano <junio@twinsun.com>,
2807 consisting of answering to the server's challenge with the proper
2810 * `NTLM' ("NT Lan Manager") scheme, based on code written by Daniel
2811 Stenberg for libcurl. Like digest, NTLM is based on a
2812 challenge-response mechanism, but unlike digest, it is non-standard
2813 (authenticates TCP connections rather than requests), undocumented
2814 and Microsoft-specific. */
2816 /* Create the authentication header contents for the `Basic' scheme.
2817 This is done by encoding the string "USER:PASS" to base64 and
2818 prepending the string "Basic " in front of it. */
2821 basic_authentication_encode (const char *user, const char *passwd)
2824 int len1 = strlen (user) + 1 + strlen (passwd);
2826 t1 = (char *)alloca (len1 + 1);
2827 sprintf (t1, "%s:%s", user, passwd);
2829 t2 = (char *)alloca (BASE64_LENGTH (len1) + 1);
2830 base64_encode (t1, len1, t2);
2832 return concat_strings ("Basic ", t2, (char *) 0);
2835 #define SKIP_WS(x) do { \
2836 while (ISSPACE (*(x))) \
2840 #ifdef ENABLE_DIGEST
2841 /* Dump the hexadecimal representation of HASH to BUF. HASH should be
2842 an array of 16 bytes containing the hash keys, and BUF should be a
2843 buffer of 33 writable characters (32 for hex digits plus one for
2844 zero termination). */
2846 dump_hash (char *buf, const unsigned char *hash)
2850 for (i = 0; i < MD5_HASHLEN; i++, hash++)
2852 *buf++ = XNUM_TO_digit (*hash >> 4);
2853 *buf++ = XNUM_TO_digit (*hash & 0xf);
2858 /* Take the line apart to find the challenge, and compose a digest
2859 authorization header. See RFC2069 section 2.1.2. */
2861 digest_authentication_encode (const char *au, const char *user,
2862 const char *passwd, const char *method,
2865 static char *realm, *opaque, *nonce;
2870 { "realm", &realm },
2871 { "opaque", &opaque },
2875 param_token name, value;
2877 realm = opaque = nonce = NULL;
2879 au += 6; /* skip over `Digest' */
2880 while (extract_param (&au, &name, &value, ','))
2883 for (i = 0; i < countof (options); i++)
2884 if (name.e - name.b == strlen (options[i].name)
2885 && 0 == strncmp (name.b, options[i].name, name.e - name.b))
2887 *options[i].variable = strdupdelim (value.b, value.e);
2891 if (!realm || !nonce || !user || !passwd || !path || !method)
2894 xfree_null (opaque);
2899 /* Calculate the digest value. */
2901 ALLOCA_MD5_CONTEXT (ctx);
2902 unsigned char hash[MD5_HASHLEN];
2903 char a1buf[MD5_HASHLEN * 2 + 1], a2buf[MD5_HASHLEN * 2 + 1];
2904 char response_digest[MD5_HASHLEN * 2 + 1];
2906 /* A1BUF = H(user ":" realm ":" password) */
2908 gen_md5_update ((unsigned char *)user, strlen (user), ctx);
2909 gen_md5_update ((unsigned char *)":", 1, ctx);
2910 gen_md5_update ((unsigned char *)realm, strlen (realm), ctx);
2911 gen_md5_update ((unsigned char *)":", 1, ctx);
2912 gen_md5_update ((unsigned char *)passwd, strlen (passwd), ctx);
2913 gen_md5_finish (ctx, hash);
2914 dump_hash (a1buf, hash);
2916 /* A2BUF = H(method ":" path) */
2918 gen_md5_update ((unsigned char *)method, strlen (method), ctx);
2919 gen_md5_update ((unsigned char *)":", 1, ctx);
2920 gen_md5_update ((unsigned char *)path, strlen (path), ctx);
2921 gen_md5_finish (ctx, hash);
2922 dump_hash (a2buf, hash);
2924 /* RESPONSE_DIGEST = H(A1BUF ":" nonce ":" A2BUF) */
2926 gen_md5_update ((unsigned char *)a1buf, MD5_HASHLEN * 2, ctx);
2927 gen_md5_update ((unsigned char *)":", 1, ctx);
2928 gen_md5_update ((unsigned char *)nonce, strlen (nonce), ctx);
2929 gen_md5_update ((unsigned char *)":", 1, ctx);
2930 gen_md5_update ((unsigned char *)a2buf, MD5_HASHLEN * 2, ctx);
2931 gen_md5_finish (ctx, hash);
2932 dump_hash (response_digest, hash);
2934 res = xmalloc (strlen (user)
2939 + 2 * MD5_HASHLEN /*strlen (response_digest)*/
2940 + (opaque ? strlen (opaque) : 0)
2942 sprintf (res, "Digest \
2943 username=\"%s\", realm=\"%s\", nonce=\"%s\", uri=\"%s\", response=\"%s\"",
2944 user, realm, nonce, path, response_digest);
2947 char *p = res + strlen (res);
2948 strcat (p, ", opaque=\"");
2955 #endif /* ENABLE_DIGEST */
2957 /* Computing the size of a string literal must take into account that
2958 value returned by sizeof includes the terminating \0. */
2959 #define STRSIZE(literal) (sizeof (literal) - 1)
2961 /* Whether chars in [b, e) begin with the literal string provided as
2962 first argument and are followed by whitespace or terminating \0.
2963 The comparison is case-insensitive. */
2964 #define STARTS(literal, b, e) \
2965 ((e) - (b) >= STRSIZE (literal) \
2966 && 0 == strncasecmp (b, literal, STRSIZE (literal)) \
2967 && ((e) - (b) == STRSIZE (literal) \
2968 || ISSPACE (b[STRSIZE (literal)])))
2971 known_authentication_scheme_p (const char *hdrbeg, const char *hdrend)
2973 return STARTS ("Basic", hdrbeg, hdrend)
2974 #ifdef ENABLE_DIGEST
2975 || STARTS ("Digest", hdrbeg, hdrend)
2978 || STARTS ("NTLM", hdrbeg, hdrend)
2985 /* Create the HTTP authorization request header. When the
2986 `WWW-Authenticate' response header is seen, according to the
2987 authorization scheme specified in that header (`Basic' and `Digest'
2988 are supported by the current implementation), produce an
2989 appropriate HTTP authorization request header. */
2991 create_authorization_line (const char *au, const char *user,
2992 const char *passwd, const char *method,
2993 const char *path, bool *finished)
2995 /* We are called only with known schemes, so we can dispatch on the
2997 switch (TOUPPER (*au))
2999 case 'B': /* Basic */
3001 return basic_authentication_encode (user, passwd);
3002 #ifdef ENABLE_DIGEST
3003 case 'D': /* Digest */
3005 return digest_authentication_encode (au, user, passwd, method, path);
3008 case 'N': /* NTLM */
3009 if (!ntlm_input (&pconn.ntlm, au))
3014 return ntlm_output (&pconn.ntlm, user, passwd, finished);
3017 /* We shouldn't get here -- this function should be only called
3018 with values approved by known_authentication_scheme_p. */
3026 if (!wget_cookie_jar)
3027 wget_cookie_jar = cookie_jar_new ();
3028 if (opt.cookies_input && !cookies_loaded_p)
3030 cookie_jar_load (wget_cookie_jar, opt.cookies_input);
3031 cookies_loaded_p = true;
3038 if (wget_cookie_jar)
3039 cookie_jar_save (wget_cookie_jar, opt.cookies_output);
3045 xfree_null (pconn.host);
3046 if (wget_cookie_jar)
3047 cookie_jar_delete (wget_cookie_jar);
3054 test_parse_content_disposition()
3059 char *opt_dir_prefix;
3063 { "filename=\"file.ext\"", NULL, "file.ext", true },
3064 { "filename=\"file.ext\"", "somedir", "somedir/file.ext", true },
3065 { "attachment; filename=\"file.ext\"", NULL, "file.ext", true },
3066 { "attachment; filename=\"file.ext\"", "somedir", "somedir/file.ext", true },
3067 { "attachment; filename=\"file.ext\"; dummy", NULL, "file.ext", true },
3068 { "attachment; filename=\"file.ext\"; dummy", "somedir", "somedir/file.ext", true },
3069 { "attachment", NULL, NULL, false },
3070 { "attachment", "somedir", NULL, false },
3073 for (i = 0; i < sizeof(test_array)/sizeof(test_array[0]); ++i)
3078 opt.dir_prefix = test_array[i].opt_dir_prefix;
3079 res = parse_content_disposition (test_array[i].hdrval, &filename);
3081 mu_assert ("test_parse_content_disposition: wrong result",
3082 res == test_array[i].result
3084 || 0 == strcmp (test_array[i].filename, filename)));
3090 #endif /* TESTING */