2 Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004,
3 2005, 2006, 2007, 2008, 2009, 2010, 2011 Free Software Foundation,
6 This file is part of GNU Wget.
8 GNU Wget is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
13 GNU Wget is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with Wget. If not, see <http://www.gnu.org/licenses/>.
21 Additional permission under GNU GPL version 3 section 7
23 If you modify this program, or any covered work, by linking or
24 combining it with the OpenSSL project's OpenSSL library (or a
25 modified version of that library), containing parts covered by the
26 terms of the OpenSSL or SSLeay licenses, the Free Software Foundation
27 grants you additional permission to convey the resulting work.
28 Corresponding Source for a non-source form of such a combination
29 shall include the source code for the parts of OpenSSL used as well
30 as that of the covered work. */
55 # include "http-ntlm.h"
68 #endif /* def __VMS */
70 extern char *version_string;
74 static char *create_authorization_line (const char *, const char *,
75 const char *, const char *,
76 const char *, bool *);
77 static char *basic_authentication_encode (const char *, const char *);
78 static bool known_authentication_scheme_p (const char *, const char *);
79 static void ensure_extension (struct http_stat *, const char *, int *);
80 static void load_cookies (void);
83 # define MIN(x, y) ((x) > (y) ? (y) : (x))
87 static bool cookies_loaded_p;
88 static struct cookie_jar *wget_cookie_jar;
90 #define TEXTHTML_S "text/html"
91 #define TEXTXHTML_S "application/xhtml+xml"
92 #define TEXTCSS_S "text/css"
94 /* Some status code validation macros: */
95 #define H_10X(x) (((x) >= 100) && ((x) < 200))
96 #define H_20X(x) (((x) >= 200) && ((x) < 300))
97 #define H_PARTIAL(x) ((x) == HTTP_STATUS_PARTIAL_CONTENTS)
98 #define H_REDIRECTED(x) ((x) == HTTP_STATUS_MOVED_PERMANENTLY \
99 || (x) == HTTP_STATUS_MOVED_TEMPORARILY \
100 || (x) == HTTP_STATUS_SEE_OTHER \
101 || (x) == HTTP_STATUS_TEMPORARY_REDIRECT)
103 /* HTTP/1.0 status codes from RFC1945, provided for reference. */
104 /* Successful 2xx. */
105 #define HTTP_STATUS_OK 200
106 #define HTTP_STATUS_CREATED 201
107 #define HTTP_STATUS_ACCEPTED 202
108 #define HTTP_STATUS_NO_CONTENT 204
109 #define HTTP_STATUS_PARTIAL_CONTENTS 206
111 /* Redirection 3xx. */
112 #define HTTP_STATUS_MULTIPLE_CHOICES 300
113 #define HTTP_STATUS_MOVED_PERMANENTLY 301
114 #define HTTP_STATUS_MOVED_TEMPORARILY 302
115 #define HTTP_STATUS_SEE_OTHER 303 /* from HTTP/1.1 */
116 #define HTTP_STATUS_NOT_MODIFIED 304
117 #define HTTP_STATUS_TEMPORARY_REDIRECT 307 /* from HTTP/1.1 */
119 /* Client error 4xx. */
120 #define HTTP_STATUS_BAD_REQUEST 400
121 #define HTTP_STATUS_UNAUTHORIZED 401
122 #define HTTP_STATUS_FORBIDDEN 403
123 #define HTTP_STATUS_NOT_FOUND 404
124 #define HTTP_STATUS_RANGE_NOT_SATISFIABLE 416
126 /* Server errors 5xx. */
127 #define HTTP_STATUS_INTERNAL 500
128 #define HTTP_STATUS_NOT_IMPLEMENTED 501
129 #define HTTP_STATUS_BAD_GATEWAY 502
130 #define HTTP_STATUS_UNAVAILABLE 503
133 rel_none, rel_name, rel_value, rel_both
140 struct request_header {
142 enum rp release_policy;
144 int hcount, hcapacity;
149 /* Create a new, empty request. At least request_set_method must be
150 called before the request can be used. */
152 static struct request *
155 struct request *req = xnew0 (struct request);
157 req->headers = xnew_array (struct request_header, req->hcapacity);
161 /* Set the request's method and its arguments. METH should be a
162 literal string (or it should outlive the request) because it will
163 not be freed. ARG will be freed by request_free. */
166 request_set_method (struct request *req, const char *meth, char *arg)
172 /* Return the method string passed with the last call to
173 request_set_method. */
176 request_method (const struct request *req)
181 /* Free one header according to the release policy specified with
182 request_set_header. */
185 release_header (struct request_header *hdr)
187 switch (hdr->release_policy)
204 /* Set the request named NAME to VALUE. Specifically, this means that
205 a "NAME: VALUE\r\n" header line will be used in the request. If a
206 header with the same name previously existed in the request, its
207 value will be replaced by this one. A NULL value means do nothing.
209 RELEASE_POLICY determines whether NAME and VALUE should be released
210 (freed) with request_free. Allowed values are:
212 - rel_none - don't free NAME or VALUE
213 - rel_name - free NAME when done
214 - rel_value - free VALUE when done
215 - rel_both - free both NAME and VALUE when done
217 Setting release policy is useful when arguments come from different
218 sources. For example:
220 // Don't free literal strings!
221 request_set_header (req, "Pragma", "no-cache", rel_none);
223 // Don't free a global variable, we'll need it later.
224 request_set_header (req, "Referer", opt.referer, rel_none);
226 // Value freshly allocated, free it when done.
227 request_set_header (req, "Range",
228 aprintf ("bytes=%s-", number_to_static_string (hs->restval)),
233 request_set_header (struct request *req, char *name, char *value,
234 enum rp release_policy)
236 struct request_header *hdr;
241 /* A NULL value is a no-op; if freeing the name is requested,
242 free it now to avoid leaks. */
243 if (release_policy == rel_name || release_policy == rel_both)
248 for (i = 0; i < req->hcount; i++)
250 hdr = &req->headers[i];
251 if (0 == strcasecmp (name, hdr->name))
253 /* Replace existing header. */
254 release_header (hdr);
257 hdr->release_policy = release_policy;
262 /* Install new header. */
264 if (req->hcount >= req->hcapacity)
266 req->hcapacity <<= 1;
267 req->headers = xrealloc (req->headers, req->hcapacity * sizeof (*hdr));
269 hdr = &req->headers[req->hcount++];
272 hdr->release_policy = release_policy;
275 /* Like request_set_header, but sets the whole header line, as
276 provided by the user using the `--header' option. For example,
277 request_set_user_header (req, "Foo: bar") works just like
278 request_set_header (req, "Foo", "bar"). */
281 request_set_user_header (struct request *req, const char *header)
284 const char *p = strchr (header, ':');
287 BOUNDED_TO_ALLOCA (header, p, name);
289 while (c_isspace (*p))
291 request_set_header (req, xstrdup (name), (char *) p, rel_name);
294 /* Remove the header with specified name from REQ. Returns true if
295 the header was actually removed, false otherwise. */
298 request_remove_header (struct request *req, char *name)
301 for (i = 0; i < req->hcount; i++)
303 struct request_header *hdr = &req->headers[i];
304 if (0 == strcasecmp (name, hdr->name))
306 release_header (hdr);
307 /* Move the remaining headers by one. */
308 if (i < req->hcount - 1)
309 memmove (hdr, hdr + 1, (req->hcount - i - 1) * sizeof (*hdr));
317 #define APPEND(p, str) do { \
318 int A_len = strlen (str); \
319 memcpy (p, str, A_len); \
323 /* Construct the request and write it to FD using fd_write. */
326 request_send (const struct request *req, int fd)
328 char *request_string, *p;
329 int i, size, write_error;
331 /* Count the request size. */
334 /* METHOD " " ARG " " "HTTP/1.0" "\r\n" */
335 size += strlen (req->method) + 1 + strlen (req->arg) + 1 + 8 + 2;
337 for (i = 0; i < req->hcount; i++)
339 struct request_header *hdr = &req->headers[i];
340 /* NAME ": " VALUE "\r\n" */
341 size += strlen (hdr->name) + 2 + strlen (hdr->value) + 2;
347 p = request_string = alloca_array (char, size);
349 /* Generate the request. */
351 APPEND (p, req->method); *p++ = ' ';
352 APPEND (p, req->arg); *p++ = ' ';
353 memcpy (p, "HTTP/1.1\r\n", 10); p += 10;
355 for (i = 0; i < req->hcount; i++)
357 struct request_header *hdr = &req->headers[i];
358 APPEND (p, hdr->name);
359 *p++ = ':', *p++ = ' ';
360 APPEND (p, hdr->value);
361 *p++ = '\r', *p++ = '\n';
364 *p++ = '\r', *p++ = '\n', *p++ = '\0';
365 assert (p - request_string == size);
369 DEBUGP (("\n---request begin---\n%s---request end---\n", request_string));
371 /* Send the request to the server. */
373 write_error = fd_write (fd, request_string, size - 1, -1);
375 logprintf (LOG_VERBOSE, _("Failed writing HTTP request: %s.\n"),
380 /* Release the resources used by REQ. */
383 request_free (struct request *req)
386 xfree_null (req->arg);
387 for (i = 0; i < req->hcount; i++)
388 release_header (&req->headers[i]);
389 xfree_null (req->headers);
393 static struct hash_table *basic_authed_hosts;
395 /* Find out if this host has issued a Basic challenge yet; if so, give
396 * it the username, password. A temporary measure until we can get
397 * proper authentication in place. */
400 maybe_send_basic_creds (const char *hostname, const char *user,
401 const char *passwd, struct request *req)
403 bool do_challenge = false;
405 if (opt.auth_without_challenge)
407 DEBUGP (("Auth-without-challenge set, sending Basic credentials.\n"));
410 else if (basic_authed_hosts
411 && hash_table_contains(basic_authed_hosts, hostname))
413 DEBUGP (("Found %s in basic_authed_hosts.\n", quote (hostname)));
418 DEBUGP (("Host %s has not issued a general basic challenge.\n",
423 request_set_header (req, "Authorization",
424 basic_authentication_encode (user, passwd),
431 register_basic_auth_host (const char *hostname)
433 if (!basic_authed_hosts)
435 basic_authed_hosts = make_nocase_string_hash_table (1);
437 if (!hash_table_contains(basic_authed_hosts, hostname))
439 hash_table_put (basic_authed_hosts, xstrdup(hostname), NULL);
440 DEBUGP (("Inserted %s into basic_authed_hosts\n", quote (hostname)));
445 /* Send the contents of FILE_NAME to SOCK. Make sure that exactly
446 PROMISED_SIZE bytes are sent over the wire -- if the file is
447 longer, read only that much; if the file is shorter, report an error. */
450 post_file (int sock, const char *file_name, wgint promised_size)
452 static char chunk[8192];
457 DEBUGP (("[writing POST file %s ... ", file_name));
459 fp = fopen (file_name, "rb");
462 while (!feof (fp) && written < promised_size)
465 int length = fread (chunk, 1, sizeof (chunk), fp);
468 towrite = MIN (promised_size - written, length);
469 write_error = fd_write (sock, chunk, towrite, -1);
479 /* If we've written less than was promised, report a (probably
480 nonsensical) error rather than break the promise. */
481 if (written < promised_size)
487 assert (written == promised_size);
488 DEBUGP (("done]\n"));
492 /* Determine whether [START, PEEKED + PEEKLEN) contains an empty line.
493 If so, return the pointer to the position after the line, otherwise
494 return NULL. This is used as callback to fd_read_hunk. The data
495 between START and PEEKED has been read and cannot be "unread"; the
496 data after PEEKED has only been peeked. */
499 response_head_terminator (const char *start, const char *peeked, int peeklen)
503 /* If at first peek, verify whether HUNK starts with "HTTP". If
504 not, this is a HTTP/0.9 request and we must bail out without
506 if (start == peeked && 0 != memcmp (start, "HTTP", MIN (peeklen, 4)))
509 /* Look for "\n[\r]\n", and return the following position if found.
510 Start two chars before the current to cover the possibility that
511 part of the terminator (e.g. "\n\r") arrived in the previous
513 p = peeked - start < 2 ? start : peeked - 2;
514 end = peeked + peeklen;
516 /* Check for \n\r\n or \n\n anywhere in [p, end-2). */
517 for (; p < end - 2; p++)
520 if (p[1] == '\r' && p[2] == '\n')
522 else if (p[1] == '\n')
525 /* p==end-2: check for \n\n directly preceding END. */
526 if (p[0] == '\n' && p[1] == '\n')
532 /* The maximum size of a single HTTP response we care to read. Rather
533 than being a limit of the reader implementation, this limit
534 prevents Wget from slurping all available memory upon encountering
535 malicious or buggy server output, thus protecting the user. Define
536 it to 0 to remove the limit. */
538 #define HTTP_RESPONSE_MAX_SIZE 65536
540 /* Read the HTTP request head from FD and return it. The error
541 conditions are the same as with fd_read_hunk.
543 To support HTTP/0.9 responses, this function tries to make sure
544 that the data begins with "HTTP". If this is not the case, no data
545 is read and an empty request is returned, so that the remaining
546 data can be treated as body. */
549 read_http_response_head (int fd)
551 return fd_read_hunk (fd, response_head_terminator, 512,
552 HTTP_RESPONSE_MAX_SIZE);
556 /* The response data. */
559 /* The array of pointers that indicate where each header starts.
560 For example, given this HTTP response:
567 The headers are located like this:
569 "HTTP/1.0 200 Ok\r\nDescription: some\r\n text\r\nEtag: x\r\n\r\n"
571 headers[0] headers[1] headers[2] headers[3]
573 I.e. headers[0] points to the beginning of the request,
574 headers[1] points to the end of the first header and the
575 beginning of the second one, etc. */
577 const char **headers;
580 /* Create a new response object from the text of the HTTP response,
581 available in HEAD. That text is automatically split into
582 constituent header lines for fast retrieval using
585 static struct response *
586 resp_new (const char *head)
591 struct response *resp = xnew0 (struct response);
596 /* Empty head means that we're dealing with a headerless
597 (HTTP/0.9) response. In that case, don't set HEADERS at
602 /* Split HEAD into header lines, so that resp_header_* functions
603 don't need to do this over and over again. */
609 DO_REALLOC (resp->headers, size, count + 1, const char *);
610 resp->headers[count++] = hdr;
612 /* Break upon encountering an empty line. */
613 if (!hdr[0] || (hdr[0] == '\r' && hdr[1] == '\n') || hdr[0] == '\n')
616 /* Find the end of HDR, including continuations. */
619 const char *end = strchr (hdr, '\n');
625 while (*hdr == ' ' || *hdr == '\t');
627 DO_REALLOC (resp->headers, size, count + 1, const char *);
628 resp->headers[count] = NULL;
633 /* Locate the header named NAME in the request data, starting with
634 position START. This allows the code to loop through the request
635 data, filtering for all requests of a given name. Returns the
636 found position, or -1 for failure. The code that uses this
637 function typically looks like this:
639 for (pos = 0; (pos = resp_header_locate (...)) != -1; pos++)
640 ... do something with header ...
642 If you only care about one header, use resp_header_get instead of
646 resp_header_locate (const struct response *resp, const char *name, int start,
647 const char **begptr, const char **endptr)
650 const char **headers = resp->headers;
653 if (!headers || !headers[1])
656 name_len = strlen (name);
662 for (; headers[i + 1]; i++)
664 const char *b = headers[i];
665 const char *e = headers[i + 1];
667 && b[name_len] == ':'
668 && 0 == strncasecmp (b, name, name_len))
671 while (b < e && c_isspace (*b))
673 while (b < e && c_isspace (e[-1]))
683 /* Find and retrieve the header named NAME in the request data. If
684 found, set *BEGPTR to its starting, and *ENDPTR to its ending
685 position, and return true. Otherwise return false.
687 This function is used as a building block for resp_header_copy
688 and resp_header_strdup. */
691 resp_header_get (const struct response *resp, const char *name,
692 const char **begptr, const char **endptr)
694 int pos = resp_header_locate (resp, name, 0, begptr, endptr);
698 /* Copy the response header named NAME to buffer BUF, no longer than
699 BUFSIZE (BUFSIZE includes the terminating 0). If the header
700 exists, true is returned, false otherwise. If there should be no
701 limit on the size of the header, use resp_header_strdup instead.
703 If BUFSIZE is 0, no data is copied, but the boolean indication of
704 whether the header is present is still returned. */
707 resp_header_copy (const struct response *resp, const char *name,
708 char *buf, int bufsize)
711 if (!resp_header_get (resp, name, &b, &e))
715 int len = MIN (e - b, bufsize - 1);
716 memcpy (buf, b, len);
722 /* Return the value of header named NAME in RESP, allocated with
723 malloc. If such a header does not exist in RESP, return NULL. */
726 resp_header_strdup (const struct response *resp, const char *name)
729 if (!resp_header_get (resp, name, &b, &e))
731 return strdupdelim (b, e);
734 /* Parse the HTTP status line, which is of format:
736 HTTP-Version SP Status-Code SP Reason-Phrase
738 The function returns the status-code, or -1 if the status line
739 appears malformed. The pointer to "reason-phrase" message is
740 returned in *MESSAGE. */
743 resp_status (const struct response *resp, char **message)
750 /* For a HTTP/0.9 response, assume status 200. */
752 *message = xstrdup (_("No headers, assuming HTTP/0.9"));
756 p = resp->headers[0];
757 end = resp->headers[1];
763 if (end - p < 4 || 0 != strncmp (p, "HTTP", 4))
767 /* Match the HTTP version. This is optional because Gnutella
768 servers have been reported to not specify HTTP version. */
769 if (p < end && *p == '/')
772 while (p < end && c_isdigit (*p))
774 if (p < end && *p == '.')
776 while (p < end && c_isdigit (*p))
780 while (p < end && c_isspace (*p))
782 if (end - p < 3 || !c_isdigit (p[0]) || !c_isdigit (p[1]) || !c_isdigit (p[2]))
785 status = 100 * (p[0] - '0') + 10 * (p[1] - '0') + (p[2] - '0');
790 while (p < end && c_isspace (*p))
792 while (p < end && c_isspace (end[-1]))
794 *message = strdupdelim (p, end);
800 /* Release the resources used by RESP. */
803 resp_free (struct response *resp)
805 xfree_null (resp->headers);
809 /* Print a single line of response, the characters [b, e). We tried
811 logprintf (LOG_VERBOSE, "%s%.*s\n", prefix, (int) (e - b), b);
812 but that failed to escape the non-printable characters and, in fact,
813 caused crashes in UTF-8 locales. */
816 print_response_line(const char *prefix, const char *b, const char *e)
819 BOUNDED_TO_ALLOCA(b, e, copy);
820 logprintf (LOG_ALWAYS, "%s%s\n", prefix,
821 quotearg_style (escape_quoting_style, copy));
824 /* Print the server response, line by line, omitting the trailing CRLF
825 from individual header lines, and prefixed with PREFIX. */
828 print_server_response (const struct response *resp, const char *prefix)
833 for (i = 0; resp->headers[i + 1]; i++)
835 const char *b = resp->headers[i];
836 const char *e = resp->headers[i + 1];
838 if (b < e && e[-1] == '\n')
840 if (b < e && e[-1] == '\r')
842 print_response_line(prefix, b, e);
846 /* Parse the `Content-Range' header and extract the information it
847 contains. Returns true if successful, false otherwise. */
849 parse_content_range (const char *hdr, wgint *first_byte_ptr,
850 wgint *last_byte_ptr, wgint *entity_length_ptr)
854 /* Ancient versions of Netscape proxy server, presumably predating
855 rfc2068, sent out `Content-Range' without the "bytes"
857 if (0 == strncasecmp (hdr, "bytes", 5))
860 /* "JavaWebServer/1.1.1" sends "bytes: x-y/z", contrary to the
864 while (c_isspace (*hdr))
869 if (!c_isdigit (*hdr))
871 for (num = 0; c_isdigit (*hdr); hdr++)
872 num = 10 * num + (*hdr - '0');
873 if (*hdr != '-' || !c_isdigit (*(hdr + 1)))
875 *first_byte_ptr = num;
877 for (num = 0; c_isdigit (*hdr); hdr++)
878 num = 10 * num + (*hdr - '0');
879 if (*hdr != '/' || !c_isdigit (*(hdr + 1)))
881 *last_byte_ptr = num;
886 for (num = 0; c_isdigit (*hdr); hdr++)
887 num = 10 * num + (*hdr - '0');
888 *entity_length_ptr = num;
892 /* Read the body of the request, but don't store it anywhere and don't
893 display a progress gauge. This is useful for reading the bodies of
894 administrative responses to which we will soon issue another
895 request. The response is not useful to the user, but reading it
896 allows us to continue using the same connection to the server.
898 If reading fails, false is returned, true otherwise. In debug
899 mode, the body is displayed for debugging purposes. */
902 skip_short_body (int fd, wgint contlen, bool chunked)
905 SKIP_SIZE = 512, /* size of the download buffer */
906 SKIP_THRESHOLD = 4096 /* the largest size we read */
908 wgint remaining_chunk_size = 0;
909 char dlbuf[SKIP_SIZE + 1];
910 dlbuf[SKIP_SIZE] = '\0'; /* so DEBUGP can safely print it */
912 assert (contlen != -1 || contlen);
914 /* If the body is too large, it makes more sense to simply close the
915 connection than to try to read the body. */
916 if (contlen > SKIP_THRESHOLD)
919 while (contlen > 0 || chunked)
924 if (remaining_chunk_size == 0)
926 char *line = fd_read_line (fd);
931 remaining_chunk_size = strtol (line, &endl, 16);
932 if (remaining_chunk_size == 0)
939 contlen = MIN (remaining_chunk_size, SKIP_SIZE);
942 DEBUGP (("Skipping %s bytes of body: [", number_to_static_string (contlen)));
944 ret = fd_read (fd, dlbuf, MIN (contlen, SKIP_SIZE), -1);
947 /* Don't normally report the error since this is an
948 optimization that should be invisible to the user. */
949 DEBUGP (("] aborting (%s).\n",
950 ret < 0 ? fd_errstr (fd) : "EOF received"));
957 remaining_chunk_size -= ret;
958 if (remaining_chunk_size == 0)
959 if (fd_read_line (fd) == NULL)
963 /* Safe even if %.*s bogusly expects terminating \0 because
964 we've zero-terminated dlbuf above. */
965 DEBUGP (("%.*s", ret, dlbuf));
968 DEBUGP (("] done.\n"));
972 #define NOT_RFC2231 0
973 #define RFC2231_NOENCODING 1
974 #define RFC2231_ENCODING 2
976 /* extract_param extracts the parameter name into NAME.
977 However, if the parameter name is in RFC2231 format then
978 this function adjusts NAME by stripping of the trailing
979 characters that are not part of the name but are present to
980 indicate the presence of encoding information in the value
981 or a fragment of a long parameter value
984 modify_param_name(param_token *name)
986 const char *delim1 = memchr (name->b, '*', name->e - name->b);
987 const char *delim2 = memrchr (name->b, '*', name->e - name->b);
993 result = NOT_RFC2231;
995 else if(delim1 == delim2)
997 if ((name->e - 1) == delim1)
999 result = RFC2231_ENCODING;
1003 result = RFC2231_NOENCODING;
1010 result = RFC2231_ENCODING;
1015 /* extract_param extract the paramater value into VALUE.
1016 Like modify_param_name this function modifies VALUE by
1017 stripping off the encoding information from the actual value
1020 modify_param_value (param_token *value, int encoding_type )
1022 if (RFC2231_ENCODING == encoding_type)
1024 const char *delim = memrchr (value->b, '\'', value->e - value->b);
1025 if ( delim != NULL )
1027 value->b = (delim+1);
1032 /* Extract a parameter from the string (typically an HTTP header) at
1033 **SOURCE and advance SOURCE to the next parameter. Return false
1034 when there are no more parameters to extract. The name of the
1035 parameter is returned in NAME, and the value in VALUE. If the
1036 parameter has no value, the token's value is zeroed out.
1038 For example, if *SOURCE points to the string "attachment;
1039 filename=\"foo bar\"", the first call to this function will return
1040 the token named "attachment" and no value, and the second call will
1041 return the token named "filename" and value "foo bar". The third
1042 call will return false, indicating no more valid tokens. */
1045 extract_param (const char **source, param_token *name, param_token *value,
1048 const char *p = *source;
1050 while (c_isspace (*p)) ++p;
1054 return false; /* no error; nothing more to extract */
1059 while (*p && !c_isspace (*p) && *p != '=' && *p != separator) ++p;
1061 if (name->b == name->e)
1062 return false; /* empty name: error */
1063 while (c_isspace (*p)) ++p;
1064 if (*p == separator || !*p) /* no value */
1067 if (*p == separator) ++p;
1072 return false; /* error */
1074 /* *p is '=', extract value */
1076 while (c_isspace (*p)) ++p;
1077 if (*p == '"') /* quoted */
1080 while (*p && *p != '"') ++p;
1084 /* Currently at closing quote; find the end of param. */
1085 while (c_isspace (*p)) ++p;
1086 while (*p && *p != separator) ++p;
1087 if (*p == separator)
1090 /* garbage after closed quote, e.g. foo="bar"baz */
1096 while (*p && *p != separator) ++p;
1098 while (value->e != value->b && c_isspace (value->e[-1]))
1100 if (*p == separator) ++p;
1104 int param_type = modify_param_name(name);
1105 if (NOT_RFC2231 != param_type)
1107 modify_param_value(value, param_type);
1113 #undef RFC2231_NOENCODING
1114 #undef RFC2231_ENCODING
1116 /* Appends the string represented by VALUE to FILENAME */
1119 append_value_to_filename (char **filename, param_token const * const value)
1121 int original_length = strlen(*filename);
1122 int new_length = strlen(*filename) + (value->e - value->b);
1123 *filename = xrealloc (*filename, new_length+1);
1124 memcpy (*filename + original_length, value->b, (value->e - value->b));
1125 (*filename)[new_length] = '\0';
1129 #define MAX(p, q) ((p) > (q) ? (p) : (q))
1131 /* Parse the contents of the `Content-Disposition' header, extracting
1132 the information useful to Wget. Content-Disposition is a header
1133 borrowed from MIME; when used in HTTP, it typically serves for
1134 specifying the desired file name of the resource. For example:
1136 Content-Disposition: attachment; filename="flora.jpg"
1138 Wget will skip the tokens it doesn't care about, such as
1139 "attachment" in the previous example; it will also skip other
1140 unrecognized params. If the header is syntactically correct and
1141 contains a file name, a copy of the file name is stored in
1142 *filename and true is returned. Otherwise, the function returns
1145 The file name is stripped of directory components and must not be
1148 Historically, this function returned filename prefixed with opt.dir_prefix,
1149 now that logic is handled by the caller, new code should pay attention,
1150 changed by crq, Sep 2010.
1154 parse_content_disposition (const char *hdr, char **filename)
1156 param_token name, value;
1158 while (extract_param (&hdr, &name, &value, ';'))
1160 int isFilename = BOUNDED_EQUAL_NO_CASE ( name.b, name.e, "filename" );
1161 if ( isFilename && value.b != NULL)
1163 /* Make the file name begin at the last slash or backslash. */
1164 const char *last_slash = memrchr (value.b, '/', value.e - value.b);
1165 const char *last_bs = memrchr (value.b, '\\', value.e - value.b);
1166 if (last_slash && last_bs)
1167 value.b = 1 + MAX (last_slash, last_bs);
1168 else if (last_slash || last_bs)
1169 value.b = 1 + (last_slash ? last_slash : last_bs);
1170 if (value.b == value.e)
1174 append_value_to_filename (filename, &value);
1176 *filename = strdupdelim (value.b, value.e);
1187 /* Persistent connections. Currently, we cache the most recently used
1188 connection as persistent, provided that the HTTP server agrees to
1189 make it such. The persistence data is stored in the variables
1190 below. Ideally, it should be possible to cache an arbitrary fixed
1191 number of these connections. */
1193 /* Whether a persistent connection is active. */
1194 static bool pconn_active;
1197 /* The socket of the connection. */
1200 /* Host and port of the currently active persistent connection. */
1204 /* Whether a ssl handshake has occoured on this connection. */
1207 /* Whether the connection was authorized. This is only done by
1208 NTLM, which authorizes *connections* rather than individual
1209 requests. (That practice is peculiar for HTTP, but it is a
1210 useful optimization.) */
1214 /* NTLM data of the current connection. */
1215 struct ntlmdata ntlm;
1219 /* Mark the persistent connection as invalid and free the resources it
1220 uses. This is used by the CLOSE_* macros after they forcefully
1221 close a registered persistent connection. */
1224 invalidate_persistent (void)
1226 DEBUGP (("Disabling further reuse of socket %d.\n", pconn.socket));
1227 pconn_active = false;
1228 fd_close (pconn.socket);
1233 /* Register FD, which should be a TCP/IP connection to HOST:PORT, as
1234 persistent. This will enable someone to use the same connection
1235 later. In the context of HTTP, this must be called only AFTER the
1236 response has been received and the server has promised that the
1237 connection will remain alive.
1239 If a previous connection was persistent, it is closed. */
1242 register_persistent (const char *host, int port, int fd, bool ssl)
1246 if (pconn.socket == fd)
1248 /* The connection FD is already registered. */
1253 /* The old persistent connection is still active; close it
1254 first. This situation arises whenever a persistent
1255 connection exists, but we then connect to a different
1256 host, and try to register a persistent connection to that
1258 invalidate_persistent ();
1262 pconn_active = true;
1264 pconn.host = xstrdup (host);
1267 pconn.authorized = false;
1269 DEBUGP (("Registered socket %d for persistent reuse.\n", fd));
1272 /* Return true if a persistent connection is available for connecting
1276 persistent_available_p (const char *host, int port, bool ssl,
1277 bool *host_lookup_failed)
1279 /* First, check whether a persistent connection is active at all. */
1283 /* If we want SSL and the last connection wasn't or vice versa,
1284 don't use it. Checking for host and port is not enough because
1285 HTTP and HTTPS can apparently coexist on the same port. */
1286 if (ssl != pconn.ssl)
1289 /* If we're not connecting to the same port, we're not interested. */
1290 if (port != pconn.port)
1293 /* If the host is the same, we're in business. If not, there is
1294 still hope -- read below. */
1295 if (0 != strcasecmp (host, pconn.host))
1297 /* Check if pconn.socket is talking to HOST under another name.
1298 This happens often when both sites are virtual hosts
1299 distinguished only by name and served by the same network
1300 interface, and hence the same web server (possibly set up by
1301 the ISP and serving many different web sites). This
1302 admittedly unconventional optimization does not contradict
1303 HTTP and works well with popular server software. */
1307 struct address_list *al;
1310 /* Don't try to talk to two different SSL sites over the same
1311 secure connection! (Besides, it's not clear that
1312 name-based virtual hosting is even possible with SSL.) */
1315 /* If pconn.socket's peer is one of the IP addresses HOST
1316 resolves to, pconn.socket is for all intents and purposes
1317 already talking to HOST. */
1319 if (!socket_ip_address (pconn.socket, &ip, ENDPOINT_PEER))
1321 /* Can't get the peer's address -- something must be very
1322 wrong with the connection. */
1323 invalidate_persistent ();
1326 al = lookup_host (host, 0);
1329 *host_lookup_failed = true;
1333 found = address_list_contains (al, &ip);
1334 address_list_release (al);
1339 /* The persistent connection's peer address was found among the
1340 addresses HOST resolved to; therefore, pconn.sock is in fact
1341 already talking to HOST -- no need to reconnect. */
1344 /* Finally, check whether the connection is still open. This is
1345 important because most servers implement liberal (short) timeout
1346 on persistent connections. Wget can of course always reconnect
1347 if the connection doesn't work out, but it's nicer to know in
1348 advance. This test is a logical followup of the first test, but
1349 is "expensive" and therefore placed at the end of the list.
1351 (Current implementation of test_socket_open has a nice side
1352 effect that it treats sockets with pending data as "closed".
1353 This is exactly what we want: if a broken server sends message
1354 body in response to HEAD, or if it sends more than conent-length
1355 data, we won't reuse the corrupted connection.) */
1357 if (!test_socket_open (pconn.socket))
1359 /* Oops, the socket is no longer open. Now that we know that,
1360 let's invalidate the persistent connection before returning
1362 invalidate_persistent ();
1369 /* The idea behind these two CLOSE macros is to distinguish between
1370 two cases: one when the job we've been doing is finished, and we
1371 want to close the connection and leave, and two when something is
1372 seriously wrong and we're closing the connection as part of
1375 In case of keep_alive, CLOSE_FINISH should leave the connection
1376 open, while CLOSE_INVALIDATE should still close it.
1378 Note that the semantics of the flag `keep_alive' is "this
1379 connection *will* be reused (the server has promised not to close
1380 the connection once we're done)", while the semantics of
1381 `pc_active_p && (fd) == pc_last_fd' is "we're *now* using an
1382 active, registered connection". */
1384 #define CLOSE_FINISH(fd) do { \
1387 if (pconn_active && (fd) == pconn.socket) \
1388 invalidate_persistent (); \
1397 #define CLOSE_INVALIDATE(fd) do { \
1398 if (pconn_active && (fd) == pconn.socket) \
1399 invalidate_persistent (); \
1407 wgint len; /* received length */
1408 wgint contlen; /* expected length */
1409 wgint restval; /* the restart value */
1410 int res; /* the result of last read */
1411 char *rderrmsg; /* error message from read error */
1412 char *newloc; /* new location (redirection) */
1413 char *remote_time; /* remote time-stamp string */
1414 char *error; /* textual HTTP error */
1415 int statcode; /* status code */
1416 char *message; /* status message */
1417 wgint rd_size; /* amount of data read from socket */
1418 double dltime; /* time it took to download the data */
1419 const char *referer; /* value of the referer header. */
1420 char *local_file; /* local file name. */
1421 bool existence_checked; /* true if we already checked for a file's
1422 existence after having begun to download
1423 (needed in gethttp for when connection is
1424 interrupted/restarted. */
1425 bool timestamp_checked; /* true if pre-download time-stamping checks
1426 * have already been performed */
1427 char *orig_file_name; /* name of file to compare for time-stamping
1428 * (might be != local_file if -K is set) */
1429 wgint orig_file_size; /* size of file to compare for time-stamping */
1430 time_t orig_file_tstamp; /* time-stamp of file to compare for
1435 free_hstat (struct http_stat *hs)
1437 xfree_null (hs->newloc);
1438 xfree_null (hs->remote_time);
1439 xfree_null (hs->error);
1440 xfree_null (hs->rderrmsg);
1441 xfree_null (hs->local_file);
1442 xfree_null (hs->orig_file_name);
1443 xfree_null (hs->message);
1445 /* Guard against being called twice. */
1447 hs->remote_time = NULL;
1452 get_file_flags (const char *filename, int *dt)
1454 logprintf (LOG_VERBOSE, _("\
1455 File %s already there; not retrieving.\n\n"), quote (filename));
1456 /* If the file is there, we suppose it's retrieved OK. */
1459 /* #### Bogusness alert. */
1460 /* If its suffix is "html" or "htm" or similar, assume text/html. */
1461 if (has_html_suffix_p (filename))
1465 #define BEGINS_WITH(line, string_constant) \
1466 (!strncasecmp (line, string_constant, sizeof (string_constant) - 1) \
1467 && (c_isspace (line[sizeof (string_constant) - 1]) \
1468 || !line[sizeof (string_constant) - 1]))
1471 #define SET_USER_AGENT(req) do { \
1472 if (!opt.useragent) \
1473 request_set_header (req, "User-Agent", \
1474 aprintf ("Wget/%s (VMS %s %s)", \
1475 version_string, vms_arch(), vms_vers()), \
1477 else if (*opt.useragent) \
1478 request_set_header (req, "User-Agent", opt.useragent, rel_none); \
1480 #else /* def __VMS */
1481 #define SET_USER_AGENT(req) do { \
1482 if (!opt.useragent) \
1483 request_set_header (req, "User-Agent", \
1484 aprintf ("Wget/%s (%s)", \
1485 version_string, OS_TYPE), \
1487 else if (*opt.useragent) \
1488 request_set_header (req, "User-Agent", opt.useragent, rel_none); \
1490 #endif /* def __VMS [else] */
1492 /* The flags that allow clobbering the file (opening with "wb").
1493 Defined here to avoid repetition later. #### This will require
1495 #define ALLOW_CLOBBER (opt.noclobber || opt.always_rest || opt.timestamping \
1496 || opt.dirstruct || opt.output_document)
1498 /* Retrieve a document through HTTP protocol. It recognizes status
1499 code, and correctly handles redirections. It closes the network
1500 socket. If it receives an error from the functions below it, it
1501 will print it if there is enough information to do so (almost
1502 always), returning the error to the caller (i.e. http_loop).
1504 Various HTTP parameters are stored to hs.
1506 If PROXY is non-NULL, the connection will be made to the proxy
1507 server, and u->url will be requested. */
1509 gethttp (struct url *u, struct http_stat *hs, int *dt, struct url *proxy,
1510 struct iri *iri, int count)
1512 struct request *req;
1515 char *user, *passwd;
1519 wgint contlen, contrange;
1526 /* Set to 1 when the authorization has already been sent and should
1527 not be tried again. */
1528 bool auth_finished = false;
1530 /* Set to 1 when just globally-set Basic authorization has been sent;
1531 * should prevent further Basic negotiations, but not other
1533 bool basic_auth_finished = false;
1535 /* Whether NTLM authentication is used for this request. */
1536 bool ntlm_seen = false;
1538 /* Whether our connection to the remote host is through SSL. */
1539 bool using_ssl = false;
1541 /* Whether a HEAD request will be issued (as opposed to GET or
1543 bool head_only = !!(*dt & HEAD_ONLY);
1546 struct response *resp;
1550 /* Whether this connection will be kept alive after the HTTP request
1554 /* Is the server using the chunked transfer encoding? */
1555 bool chunked_transfer_encoding = false;
1557 /* Whether keep-alive should be inhibited. */
1558 bool inhibit_keep_alive =
1559 !opt.http_keep_alive || opt.ignore_length;
1561 /* Headers sent when using POST. */
1562 wgint post_data_size = 0;
1564 bool host_lookup_failed = false;
1567 if (u->scheme == SCHEME_HTTPS)
1569 /* Initialize the SSL context. After this has once been done,
1570 it becomes a no-op. */
1573 scheme_disable (SCHEME_HTTPS);
1574 logprintf (LOG_NOTQUIET,
1575 _("Disabling SSL due to encountered errors.\n"));
1576 return SSLINITFAILED;
1579 #endif /* HAVE_SSL */
1581 /* Initialize certain elements of struct http_stat. */
1585 hs->rderrmsg = NULL;
1587 hs->remote_time = NULL;
1593 /* Prepare the request to send. */
1595 req = request_new ();
1598 const char *meth = "GET";
1601 else if (opt.post_file_name || opt.post_data)
1603 /* Use the full path, i.e. one that includes the leading slash and
1604 the query string. E.g. if u->path is "foo/bar" and u->query is
1605 "param=value", full_path will be "/foo/bar?param=value". */
1608 /* When using SSL over proxy, CONNECT establishes a direct
1609 connection to the HTTPS server. Therefore use the same
1610 argument as when talking to the server directly. */
1611 && u->scheme != SCHEME_HTTPS
1614 meth_arg = xstrdup (u->url);
1616 meth_arg = url_full_path (u);
1617 request_set_method (req, meth, meth_arg);
1620 request_set_header (req, "Referer", (char *) hs->referer, rel_none);
1621 if (*dt & SEND_NOCACHE)
1622 request_set_header (req, "Pragma", "no-cache", rel_none);
1623 if (hs->restval && !opt.timestamping)
1624 request_set_header (req, "Range",
1625 aprintf ("bytes=%s-",
1626 number_to_static_string (hs->restval)),
1628 SET_USER_AGENT (req);
1629 request_set_header (req, "Accept", "*/*", rel_none);
1631 /* Find the username and password for authentication. */
1634 search_netrc (u->host, (const char **)&user, (const char **)&passwd, 0);
1635 user = user ? user : (opt.http_user ? opt.http_user : opt.user);
1636 passwd = passwd ? passwd : (opt.http_passwd ? opt.http_passwd : opt.passwd);
1638 /* We only do "site-wide" authentication with "global" user/password
1639 * values unless --auth-no-challange has been requested; URL user/password
1640 * info overrides. */
1641 if (user && passwd && (!u->user || opt.auth_without_challenge))
1643 /* If this is a host for which we've already received a Basic
1644 * challenge, we'll go ahead and send Basic authentication creds. */
1645 basic_auth_finished = maybe_send_basic_creds(u->host, user, passwd, req);
1648 /* Generate the Host header, HOST:PORT. Take into account that:
1650 - Broken server-side software often doesn't recognize the PORT
1651 argument, so we must generate "Host: www.server.com" instead of
1652 "Host: www.server.com:80" (and likewise for https port).
1654 - IPv6 addresses contain ":", so "Host: 3ffe:8100:200:2::2:1234"
1655 becomes ambiguous and needs to be rewritten as "Host:
1656 [3ffe:8100:200:2::2]:1234". */
1658 /* Formats arranged for hfmt[add_port][add_squares]. */
1659 static const char *hfmt[][2] = {
1660 { "%s", "[%s]" }, { "%s:%d", "[%s]:%d" }
1662 int add_port = u->port != scheme_default_port (u->scheme);
1663 int add_squares = strchr (u->host, ':') != NULL;
1664 request_set_header (req, "Host",
1665 aprintf (hfmt[add_port][add_squares], u->host, u->port),
1669 if (inhibit_keep_alive)
1670 request_set_header (req, "Connection", "Close", rel_none);
1674 request_set_header (req, "Connection", "Keep-Alive", rel_none);
1677 request_set_header (req, "Connection", "Close", rel_none);
1678 request_set_header (req, "Proxy-Connection", "Keep-Alive", rel_none);
1682 if (opt.post_data || opt.post_file_name)
1684 request_set_header (req, "Content-Type",
1685 "application/x-www-form-urlencoded", rel_none);
1687 post_data_size = strlen (opt.post_data);
1690 post_data_size = file_size (opt.post_file_name);
1691 if (post_data_size == -1)
1693 logprintf (LOG_NOTQUIET, _("POST data file %s missing: %s\n"),
1694 quote (opt.post_file_name), strerror (errno));
1698 request_set_header (req, "Content-Length",
1699 xstrdup (number_to_static_string (post_data_size)),
1704 /* We need to come back here when the initial attempt to retrieve
1705 without authorization header fails. (Expected to happen at least
1706 for the Digest authorization scheme.) */
1709 request_set_header (req, "Cookie",
1710 cookie_header (wget_cookie_jar,
1711 u->host, u->port, u->path,
1713 u->scheme == SCHEME_HTTPS
1720 /* Add the user headers. */
1721 if (opt.user_headers)
1724 for (i = 0; opt.user_headers[i]; i++)
1725 request_set_user_header (req, opt.user_headers[i]);
1731 char *proxy_user, *proxy_passwd;
1732 /* For normal username and password, URL components override
1733 command-line/wgetrc parameters. With proxy
1734 authentication, it's the reverse, because proxy URLs are
1735 normally the "permanent" ones, so command-line args
1736 should take precedence. */
1737 if (opt.proxy_user && opt.proxy_passwd)
1739 proxy_user = opt.proxy_user;
1740 proxy_passwd = opt.proxy_passwd;
1744 proxy_user = proxy->user;
1745 proxy_passwd = proxy->passwd;
1747 /* #### This does not appear right. Can't the proxy request,
1748 say, `Digest' authentication? */
1749 if (proxy_user && proxy_passwd)
1750 proxyauth = basic_authentication_encode (proxy_user, proxy_passwd);
1752 /* If we're using a proxy, we will be connecting to the proxy
1756 /* Proxy authorization over SSL is handled below. */
1758 if (u->scheme != SCHEME_HTTPS)
1760 request_set_header (req, "Proxy-Authorization", proxyauth, rel_value);
1765 /* Establish the connection. */
1767 if (inhibit_keep_alive)
1771 /* Look for a persistent connection to target host, unless a
1772 proxy is used. The exception is when SSL is in use, in which
1773 case the proxy is nothing but a passthrough to the target
1774 host, registered as a connection to the latter. */
1775 struct url *relevant = conn;
1777 if (u->scheme == SCHEME_HTTPS)
1781 if (persistent_available_p (relevant->host, relevant->port,
1783 relevant->scheme == SCHEME_HTTPS,
1787 &host_lookup_failed))
1789 sock = pconn.socket;
1790 using_ssl = pconn.ssl;
1791 logprintf (LOG_VERBOSE, _("Reusing existing connection to %s:%d.\n"),
1792 quotearg_style (escape_quoting_style, pconn.host),
1794 DEBUGP (("Reusing fd %d.\n", sock));
1795 if (pconn.authorized)
1796 /* If the connection is already authorized, the "Basic"
1797 authorization added by code above is unnecessary and
1799 request_remove_header (req, "Authorization");
1801 else if (host_lookup_failed)
1804 logprintf(LOG_NOTQUIET,
1805 _("%s: unable to resolve host address %s\n"),
1806 exec_name, quote (relevant->host));
1813 sock = connect_to_host (conn->host, conn->port);
1822 return (retryable_socket_connect_error (errno)
1823 ? CONERROR : CONIMPOSSIBLE);
1827 if (proxy && u->scheme == SCHEME_HTTPS)
1829 /* When requesting SSL URLs through proxies, use the
1830 CONNECT method to request passthrough. */
1831 struct request *connreq = request_new ();
1832 request_set_method (connreq, "CONNECT",
1833 aprintf ("%s:%d", u->host, u->port));
1834 SET_USER_AGENT (connreq);
1837 request_set_header (connreq, "Proxy-Authorization",
1838 proxyauth, rel_value);
1839 /* Now that PROXYAUTH is part of the CONNECT request,
1840 zero it out so we don't send proxy authorization with
1841 the regular request below. */
1844 /* Examples in rfc2817 use the Host header in CONNECT
1845 requests. I don't see how that gains anything, given
1846 that the contents of Host would be exactly the same as
1847 the contents of CONNECT. */
1849 write_error = request_send (connreq, sock);
1850 request_free (connreq);
1851 if (write_error < 0)
1853 CLOSE_INVALIDATE (sock);
1857 head = read_http_response_head (sock);
1860 logprintf (LOG_VERBOSE, _("Failed reading proxy response: %s\n"),
1862 CLOSE_INVALIDATE (sock);
1871 DEBUGP (("proxy responded with: [%s]\n", head));
1873 resp = resp_new (head);
1874 statcode = resp_status (resp, &message);
1877 char *tms = datetime_str (time (NULL));
1878 logprintf (LOG_VERBOSE, "%d\n", statcode);
1879 logprintf (LOG_NOTQUIET, _("%s ERROR %d: %s.\n"), tms, statcode,
1880 quotearg_style (escape_quoting_style,
1881 _("Malformed status line")));
1885 hs->message = xstrdup (message);
1888 if (statcode != 200)
1891 logprintf (LOG_NOTQUIET, _("Proxy tunneling failed: %s"),
1892 message ? quotearg_style (escape_quoting_style, message) : "?");
1893 xfree_null (message);
1896 xfree_null (message);
1898 /* SOCK is now *really* connected to u->host, so update CONN
1899 to reflect this. That way register_persistent will
1900 register SOCK as being connected to u->host:u->port. */
1904 if (conn->scheme == SCHEME_HTTPS)
1906 if (!ssl_connect_wget (sock))
1911 else if (!ssl_check_certificate (sock, u->host))
1914 return VERIFCERTERR;
1918 #endif /* HAVE_SSL */
1921 /* Send the request to server. */
1922 write_error = request_send (req, sock);
1924 if (write_error >= 0)
1928 DEBUGP (("[POST data: %s]\n", opt.post_data));
1929 write_error = fd_write (sock, opt.post_data, post_data_size, -1);
1931 else if (opt.post_file_name && post_data_size != 0)
1932 write_error = post_file (sock, opt.post_file_name, post_data_size);
1935 if (write_error < 0)
1937 CLOSE_INVALIDATE (sock);
1941 logprintf (LOG_VERBOSE, _("%s request sent, awaiting response... "),
1942 proxy ? "Proxy" : "HTTP");
1948 head = read_http_response_head (sock);
1953 logputs (LOG_NOTQUIET, _("No data received.\n"));
1954 CLOSE_INVALIDATE (sock);
1960 logprintf (LOG_NOTQUIET, _("Read error (%s) in headers.\n"),
1962 CLOSE_INVALIDATE (sock);
1967 DEBUGP (("\n---response begin---\n%s---response end---\n", head));
1969 resp = resp_new (head);
1971 /* Check for status line. */
1973 statcode = resp_status (resp, &message);
1976 char *tms = datetime_str (time (NULL));
1977 logprintf (LOG_VERBOSE, "%d\n", statcode);
1978 logprintf (LOG_NOTQUIET, _("%s ERROR %d: %s.\n"), tms, statcode,
1979 quotearg_style (escape_quoting_style,
1980 _("Malformed status line")));
1981 CLOSE_INVALIDATE (sock);
1986 if (H_10X (statcode))
1988 DEBUGP (("Ignoring response\n"));
1992 hs->message = xstrdup (message);
1993 if (!opt.server_response)
1994 logprintf (LOG_VERBOSE, "%2d %s\n", statcode,
1995 message ? quotearg_style (escape_quoting_style, message) : "");
1998 logprintf (LOG_VERBOSE, "\n");
1999 print_server_response (resp, " ");
2002 if (!opt.ignore_length
2003 && resp_header_copy (resp, "Content-Length", hdrval, sizeof (hdrval)))
2007 parsed = str_to_wgint (hdrval, NULL, 10);
2008 if (parsed == WGINT_MAX && errno == ERANGE)
2011 #### If Content-Length is out of range, it most likely
2012 means that the file is larger than 2G and that we're
2013 compiled without LFS. In that case we should probably
2014 refuse to even attempt to download the file. */
2017 else if (parsed < 0)
2019 /* Negative Content-Length; nonsensical, so we can't
2020 assume any information about the content to receive. */
2027 /* Check for keep-alive related responses. */
2028 if (!inhibit_keep_alive && contlen != -1)
2030 if (resp_header_copy (resp, "Connection", hdrval, sizeof (hdrval)))
2032 if (0 == strcasecmp (hdrval, "Close"))
2037 resp_header_copy (resp, "Transfer-Encoding", hdrval, sizeof (hdrval));
2038 if (0 == strcasecmp (hdrval, "chunked"))
2039 chunked_transfer_encoding = true;
2041 /* Handle (possibly multiple instances of) the Set-Cookie header. */
2045 const char *scbeg, *scend;
2046 /* The jar should have been created by now. */
2047 assert (wget_cookie_jar != NULL);
2049 (scpos = resp_header_locate (resp, "Set-Cookie", scpos,
2050 &scbeg, &scend)) != -1;
2053 char *set_cookie; BOUNDED_TO_ALLOCA (scbeg, scend, set_cookie);
2054 cookie_handle_set_cookie (wget_cookie_jar, u->host, u->port,
2055 u->path, set_cookie);
2060 /* The server has promised that it will not close the connection
2061 when we're done. This means that we can register it. */
2062 register_persistent (conn->host, conn->port, sock, using_ssl);
2064 if (statcode == HTTP_STATUS_UNAUTHORIZED)
2066 /* Authorization is required. */
2067 if (keep_alive && !head_only
2068 && skip_short_body (sock, contlen, chunked_transfer_encoding))
2069 CLOSE_FINISH (sock);
2071 CLOSE_INVALIDATE (sock);
2072 pconn.authorized = false;
2073 if (!auth_finished && (user && passwd))
2075 /* IIS sends multiple copies of WWW-Authenticate, one with
2076 the value "negotiate", and other(s) with data. Loop over
2077 all the occurrences and pick the one we recognize. */
2079 const char *wabeg, *waend;
2080 char *www_authenticate = NULL;
2082 (wapos = resp_header_locate (resp, "WWW-Authenticate", wapos,
2083 &wabeg, &waend)) != -1;
2085 if (known_authentication_scheme_p (wabeg, waend))
2087 BOUNDED_TO_ALLOCA (wabeg, waend, www_authenticate);
2091 if (!www_authenticate)
2093 /* If the authentication header is missing or
2094 unrecognized, there's no sense in retrying. */
2095 logputs (LOG_NOTQUIET, _("Unknown authentication scheme.\n"));
2097 else if (!basic_auth_finished
2098 || !BEGINS_WITH (www_authenticate, "Basic"))
2101 pth = url_full_path (u);
2102 request_set_header (req, "Authorization",
2103 create_authorization_line (www_authenticate,
2105 request_method (req),
2109 if (BEGINS_WITH (www_authenticate, "NTLM"))
2111 else if (!u->user && BEGINS_WITH (www_authenticate, "Basic"))
2113 /* Need to register this host as using basic auth,
2114 * so we automatically send creds next time. */
2115 register_basic_auth_host (u->host);
2118 xfree_null (message);
2121 goto retry_with_auth;
2125 /* We already did Basic auth, and it failed. Gotta
2129 logputs (LOG_NOTQUIET, _("Authorization failed.\n"));
2131 xfree_null (message);
2136 else /* statcode != HTTP_STATUS_UNAUTHORIZED */
2138 /* Kludge: if NTLM is used, mark the TCP connection as authorized. */
2140 pconn.authorized = true;
2143 /* Determine the local filename if needed. Notice that if -O is used
2144 * hstat.local_file is set by http_loop to the argument of -O. */
2145 if (!hs->local_file)
2147 char *local_file = NULL;
2149 /* Honor Content-Disposition whether possible. */
2150 if (!opt.content_disposition
2151 || !resp_header_copy (resp, "Content-Disposition",
2152 hdrval, sizeof (hdrval))
2153 || !parse_content_disposition (hdrval, &local_file))
2155 /* The Content-Disposition header is missing or broken.
2156 * Choose unique file name according to given URL. */
2157 hs->local_file = url_file_name (u, NULL);
2161 DEBUGP (("Parsed filename from Content-Disposition: %s\n",
2163 hs->local_file = url_file_name (u, local_file);
2167 /* TODO: perform this check only once. */
2168 if (!hs->existence_checked && file_exists_p (hs->local_file))
2170 if (opt.noclobber && !opt.output_document)
2172 /* If opt.noclobber is turned on and file already exists, do not
2173 retrieve the file. But if the output_document was given, then this
2174 test was already done and the file didn't exist. Hence the !opt.output_document */
2175 get_file_flags (hs->local_file, dt);
2177 xfree_null (message);
2178 return RETRUNNEEDED;
2180 else if (!ALLOW_CLOBBER)
2182 char *unique = unique_name (hs->local_file, true);
2183 if (unique != hs->local_file)
2184 xfree (hs->local_file);
2185 hs->local_file = unique;
2188 hs->existence_checked = true;
2190 /* Support timestamping */
2191 /* TODO: move this code out of gethttp. */
2192 if (opt.timestamping && !hs->timestamp_checked)
2194 size_t filename_len = strlen (hs->local_file);
2195 char *filename_plus_orig_suffix = alloca (filename_len + sizeof (ORIG_SFX));
2196 bool local_dot_orig_file_exists = false;
2197 char *local_filename = NULL;
2200 if (opt.backup_converted)
2201 /* If -K is specified, we'll act on the assumption that it was specified
2202 last time these files were downloaded as well, and instead of just
2203 comparing local file X against server file X, we'll compare local
2204 file X.orig (if extant, else X) against server file X. If -K
2205 _wasn't_ specified last time, or the server contains files called
2206 *.orig, -N will be back to not operating correctly with -k. */
2208 /* Would a single s[n]printf() call be faster? --dan
2210 Definitely not. sprintf() is horribly slow. It's a
2211 different question whether the difference between the two
2212 affects a program. Usually I'd say "no", but at one
2213 point I profiled Wget, and found that a measurable and
2214 non-negligible amount of time was lost calling sprintf()
2215 in url.c. Replacing sprintf with inline calls to
2216 strcpy() and number_to_string() made a difference.
2218 memcpy (filename_plus_orig_suffix, hs->local_file, filename_len);
2219 memcpy (filename_plus_orig_suffix + filename_len,
2220 ORIG_SFX, sizeof (ORIG_SFX));
2222 /* Try to stat() the .orig file. */
2223 if (stat (filename_plus_orig_suffix, &st) == 0)
2225 local_dot_orig_file_exists = true;
2226 local_filename = filename_plus_orig_suffix;
2230 if (!local_dot_orig_file_exists)
2231 /* Couldn't stat() <file>.orig, so try to stat() <file>. */
2232 if (stat (hs->local_file, &st) == 0)
2233 local_filename = hs->local_file;
2235 if (local_filename != NULL)
2236 /* There was a local file, so we'll check later to see if the version
2237 the server has is the same version we already have, allowing us to
2240 hs->orig_file_name = xstrdup (local_filename);
2241 hs->orig_file_size = st.st_size;
2242 hs->orig_file_tstamp = st.st_mtime;
2244 /* Modification time granularity is 2 seconds for Windows, so
2245 increase local time by 1 second for later comparison. */
2246 ++hs->orig_file_tstamp;
2253 hs->statcode = statcode;
2255 hs->error = xstrdup (_("Malformed status line"));
2257 hs->error = xstrdup (_("(no description)"));
2259 hs->error = xstrdup (message);
2260 xfree_null (message);
2262 type = resp_header_strdup (resp, "Content-Type");
2265 char *tmp = strchr (type, ';');
2268 /* sXXXav: only needed if IRI support is enabled */
2269 char *tmp2 = tmp + 1;
2271 while (tmp > type && c_isspace (tmp[-1]))
2275 /* Try to get remote encoding if needed */
2276 if (opt.enable_iri && !opt.encoding_remote)
2278 tmp = parse_charset (tmp2);
2280 set_content_encoding (iri, tmp);
2284 hs->newloc = resp_header_strdup (resp, "Location");
2285 hs->remote_time = resp_header_strdup (resp, "Last-Modified");
2287 if (resp_header_copy (resp, "Content-Range", hdrval, sizeof (hdrval)))
2289 wgint first_byte_pos, last_byte_pos, entity_length;
2290 if (parse_content_range (hdrval, &first_byte_pos, &last_byte_pos,
2293 contrange = first_byte_pos;
2294 contlen = last_byte_pos - first_byte_pos + 1;
2299 /* 20x responses are counted among successful by default. */
2300 if (H_20X (statcode))
2303 /* Return if redirected. */
2304 if (H_REDIRECTED (statcode) || statcode == HTTP_STATUS_MULTIPLE_CHOICES)
2306 /* RFC2068 says that in case of the 300 (multiple choices)
2307 response, the server can output a preferred URL through
2308 `Location' header; otherwise, the request should be treated
2309 like GET. So, if the location is set, it will be a
2310 redirection; otherwise, just proceed normally. */
2311 if (statcode == HTTP_STATUS_MULTIPLE_CHOICES && !hs->newloc)
2315 logprintf (LOG_VERBOSE,
2316 _("Location: %s%s\n"),
2317 hs->newloc ? escnonprint_uri (hs->newloc) : _("unspecified"),
2318 hs->newloc ? _(" [following]") : "");
2319 if (keep_alive && !head_only
2320 && skip_short_body (sock, contlen, chunked_transfer_encoding))
2321 CLOSE_FINISH (sock);
2323 CLOSE_INVALIDATE (sock);
2326 /* From RFC2616: The status codes 303 and 307 have
2327 been added for servers that wish to make unambiguously
2328 clear which kind of reaction is expected of the client.
2330 A 307 should be redirected using the same method,
2331 in other words, a POST should be preserved and not
2332 converted to a GET in that case. */
2333 if (statcode == HTTP_STATUS_TEMPORARY_REDIRECT)
2334 return NEWLOCATION_KEEP_POST;
2339 /* If content-type is not given, assume text/html. This is because
2340 of the multitude of broken CGI's that "forget" to generate the
2343 0 == strncasecmp (type, TEXTHTML_S, strlen (TEXTHTML_S)) ||
2344 0 == strncasecmp (type, TEXTXHTML_S, strlen (TEXTXHTML_S)))
2350 0 == strncasecmp (type, TEXTCSS_S, strlen (TEXTCSS_S)))
2355 if (opt.adjust_extension)
2358 /* -E / --adjust-extension / adjust_extension = on was specified,
2359 and this is a text/html file. If some case-insensitive
2360 variation on ".htm[l]" isn't already the file's suffix,
2363 ensure_extension (hs, ".html", dt);
2365 else if (*dt & TEXTCSS)
2367 ensure_extension (hs, ".css", dt);
2371 if (statcode == HTTP_STATUS_RANGE_NOT_SATISFIABLE
2372 || (!opt.timestamping && hs->restval > 0 && statcode == HTTP_STATUS_OK
2373 && contrange == 0 && contlen >= 0 && hs->restval >= contlen))
2375 /* If `-c' is in use and the file has been fully downloaded (or
2376 the remote file has shrunk), Wget effectively requests bytes
2377 after the end of file and the server response with 416
2378 (or 200 with a <= Content-Length. */
2379 logputs (LOG_VERBOSE, _("\
2380 \n The file is already fully retrieved; nothing to do.\n\n"));
2381 /* In case the caller inspects. */
2384 /* Mark as successfully retrieved. */
2387 CLOSE_INVALIDATE (sock); /* would be CLOSE_FINISH, but there
2388 might be more bytes in the body. */
2390 return RETRUNNEEDED;
2392 if ((contrange != 0 && contrange != hs->restval)
2393 || (H_PARTIAL (statcode) && !contrange))
2395 /* The Range request was somehow misunderstood by the server.
2398 CLOSE_INVALIDATE (sock);
2405 hs->contlen = contlen + contrange;
2411 /* No need to print this output if the body won't be
2412 downloaded at all, or if the original server response is
2414 logputs (LOG_VERBOSE, _("Length: "));
2417 logputs (LOG_VERBOSE, number_to_static_string (contlen + contrange));
2418 if (contlen + contrange >= 1024)
2419 logprintf (LOG_VERBOSE, " (%s)",
2420 human_readable (contlen + contrange));
2423 if (contlen >= 1024)
2424 logprintf (LOG_VERBOSE, _(", %s (%s) remaining"),
2425 number_to_static_string (contlen),
2426 human_readable (contlen));
2428 logprintf (LOG_VERBOSE, _(", %s remaining"),
2429 number_to_static_string (contlen));
2433 logputs (LOG_VERBOSE,
2434 opt.ignore_length ? _("ignored") : _("unspecified"));
2436 logprintf (LOG_VERBOSE, " [%s]\n", quotearg_style (escape_quoting_style, type));
2438 logputs (LOG_VERBOSE, "\n");
2442 type = NULL; /* We don't need it any more. */
2444 /* Return if we have no intention of further downloading. */
2445 if (!(*dt & RETROKF) || head_only)
2447 /* In case the caller cares to look... */
2452 /* Pre-1.10 Wget used CLOSE_INVALIDATE here. Now we trust the
2453 servers not to send body in response to a HEAD request, and
2454 those that do will likely be caught by test_socket_open.
2455 If not, they can be worked around using
2456 `--no-http-keep-alive'. */
2457 CLOSE_FINISH (sock);
2459 && skip_short_body (sock, contlen, chunked_transfer_encoding))
2460 /* Successfully skipped the body; also keep using the socket. */
2461 CLOSE_FINISH (sock);
2463 CLOSE_INVALIDATE (sock);
2465 return RETRFINISHED;
2469 For VMS, define common fopen() optional arguments.
2472 # define FOPEN_OPT_ARGS "fop=sqo", "acc", acc_cb, &open_id
2473 # define FOPEN_BIN_FLAG 3
2474 #else /* def __VMS */
2475 # define FOPEN_BIN_FLAG true
2476 #endif /* def __VMS [else] */
2478 /* Open the local file. */
2481 mkalldirs (hs->local_file);
2483 rotate_backups (hs->local_file);
2490 fp = fopen (hs->local_file, "ab", FOPEN_OPT_ARGS);
2491 #else /* def __VMS */
2492 fp = fopen (hs->local_file, "ab");
2493 #endif /* def __VMS [else] */
2495 else if (ALLOW_CLOBBER || count > 0)
2497 if (opt.unlink && file_exists_p (hs->local_file))
2499 int res = unlink (hs->local_file);
2502 logprintf (LOG_NOTQUIET, "%s: %s\n", hs->local_file,
2504 CLOSE_INVALIDATE (sock);
2514 fp = fopen (hs->local_file, "wb", FOPEN_OPT_ARGS);
2515 #else /* def __VMS */
2516 fp = fopen (hs->local_file, "wb");
2517 #endif /* def __VMS [else] */
2521 fp = fopen_excl (hs->local_file, FOPEN_BIN_FLAG);
2522 if (!fp && errno == EEXIST)
2524 /* We cannot just invent a new name and use it (which is
2525 what functions like unique_create typically do)
2526 because we told the user we'd use this name.
2527 Instead, return and retry the download. */
2528 logprintf (LOG_NOTQUIET,
2529 _("%s has sprung into existence.\n"),
2531 CLOSE_INVALIDATE (sock);
2533 return FOPEN_EXCL_ERR;
2538 logprintf (LOG_NOTQUIET, "%s: %s\n", hs->local_file, strerror (errno));
2539 CLOSE_INVALIDATE (sock);
2547 /* Print fetch message, if opt.verbose. */
2550 logprintf (LOG_NOTQUIET, _("Saving to: %s\n"),
2551 HYPHENP (hs->local_file) ? quote ("STDOUT") : quote (hs->local_file));
2554 /* This confuses the timestamping code that checks for file size.
2555 #### The timestamping code should be smarter about file size. */
2556 if (opt.save_headers && hs->restval == 0)
2557 fwrite (head, 1, strlen (head), fp);
2559 /* Now we no longer need to store the response header. */
2562 /* Download the request body. */
2565 /* If content-length is present, read that much; otherwise, read
2566 until EOF. The HTTP spec doesn't require the server to
2567 actually close the connection when it's done sending data. */
2568 flags |= rb_read_exactly;
2569 if (hs->restval > 0 && contrange == 0)
2570 /* If the server ignored our range request, instruct fd_read_body
2571 to skip the first RESTVAL bytes of body. */
2572 flags |= rb_skip_startpos;
2574 if (chunked_transfer_encoding)
2575 flags |= rb_chunked_transfer_encoding;
2577 hs->len = hs->restval;
2579 hs->res = fd_read_body (sock, fp, contlen != -1 ? contlen : 0,
2580 hs->restval, &hs->rd_size, &hs->len, &hs->dltime,
2584 CLOSE_FINISH (sock);
2588 hs->rderrmsg = xstrdup (fd_errstr (sock));
2589 CLOSE_INVALIDATE (sock);
2596 return RETRFINISHED;
2599 /* The genuine HTTP loop! This is the part where the retrieval is
2600 retried, and retried, and retried, and... */
2602 http_loop (struct url *u, struct url *original_url, char **newloc,
2603 char **local_file, const char *referer, int *dt, struct url *proxy,
2607 bool got_head = false; /* used for time-stamping and filename detection */
2608 bool time_came_from_head = false;
2609 bool got_name = false;
2612 uerr_t err, ret = TRYLIMEXC;
2613 time_t tmr = -1; /* remote time-stamp */
2614 struct http_stat hstat; /* HTTP status */
2616 bool send_head_first = true;
2618 bool force_full_retrieve = false;
2620 /* Assert that no value for *LOCAL_FILE was passed. */
2621 assert (local_file == NULL || *local_file == NULL);
2623 /* Set LOCAL_FILE parameter. */
2624 if (local_file && opt.output_document)
2625 *local_file = HYPHENP (opt.output_document) ? NULL : xstrdup (opt.output_document);
2627 /* Reset NEWLOC parameter. */
2630 /* This used to be done in main(), but it's a better idea to do it
2631 here so that we don't go through the hoops if we're just using
2636 /* Warn on (likely bogus) wildcard usage in HTTP. */
2637 if (opt.ftp_glob && has_wildcards_p (u->path))
2638 logputs (LOG_VERBOSE, _("Warning: wildcards not supported in HTTP.\n"));
2640 /* Setup hstat struct. */
2642 hstat.referer = referer;
2644 if (opt.output_document)
2646 hstat.local_file = xstrdup (opt.output_document);
2649 else if (!opt.content_disposition)
2652 url_file_name (opt.trustservernames ? u : original_url, NULL);
2656 if (got_name && file_exists_p (hstat.local_file) && opt.noclobber && !opt.output_document)
2658 /* If opt.noclobber is turned on and file already exists, do not
2659 retrieve the file. But if the output_document was given, then this
2660 test was already done and the file didn't exist. Hence the !opt.output_document */
2661 get_file_flags (hstat.local_file, dt);
2666 /* Reset the counter. */
2669 /* Reset the document type. */
2672 /* Skip preliminary HEAD request if we're not in spider mode. */
2674 send_head_first = false;
2676 /* Send preliminary HEAD request if -N is given and we have an existing
2677 * destination file. */
2678 file_name = url_file_name (opt.trustservernames ? u : original_url, NULL);
2679 if (opt.timestamping && (file_exists_p (file_name)
2680 || opt.content_disposition))
2681 send_head_first = true;
2687 /* Increment the pass counter. */
2689 sleep_between_retrievals (count);
2691 /* Get the current time string. */
2692 tms = datetime_str (time (NULL));
2694 if (opt.spider && !got_head)
2695 logprintf (LOG_VERBOSE, _("\
2696 Spider mode enabled. Check if remote file exists.\n"));
2698 /* Print fetch message, if opt.verbose. */
2701 char *hurl = url_string (u, URL_AUTH_HIDE_PASSWD);
2706 sprintf (tmp, _("(try:%2d)"), count);
2707 logprintf (LOG_NOTQUIET, "--%s-- %s %s\n",
2712 logprintf (LOG_NOTQUIET, "--%s-- %s\n",
2717 ws_changetitle (hurl);
2722 /* Default document type is empty. However, if spider mode is
2723 on or time-stamping is employed, HEAD_ONLY commands is
2724 encoded within *dt. */
2725 if (send_head_first && !got_head)
2730 /* Decide whether or not to restart. */
2731 if (force_full_retrieve)
2732 hstat.restval = hstat.len;
2733 else if (opt.always_rest
2735 && stat (hstat.local_file, &st) == 0
2736 && S_ISREG (st.st_mode))
2737 /* When -c is used, continue from on-disk size. (Can't use
2738 hstat.len even if count>1 because we don't want a failed
2739 first attempt to clobber existing data.) */
2740 hstat.restval = st.st_size;
2742 /* otherwise, continue where the previous try left off */
2743 hstat.restval = hstat.len;
2747 /* Decide whether to send the no-cache directive. We send it in
2749 a) we're using a proxy, and we're past our first retrieval.
2750 Some proxies are notorious for caching incomplete data, so
2751 we require a fresh get.
2752 b) caching is explicitly inhibited. */
2753 if ((proxy && count > 1) /* a */
2754 || !opt.allow_cache) /* b */
2755 *dt |= SEND_NOCACHE;
2757 *dt &= ~SEND_NOCACHE;
2759 /* Try fetching the document, or at least its head. */
2760 err = gethttp (u, &hstat, dt, proxy, iri, count);
2763 tms = datetime_str (time (NULL));
2765 /* Get the new location (with or without the redirection). */
2767 *newloc = xstrdup (hstat.newloc);
2771 case HERR: case HEOF: case CONSOCKERR: case CONCLOSED:
2772 case CONERROR: case READERR: case WRITEFAILED:
2773 case RANGEERR: case FOPEN_EXCL_ERR:
2774 /* Non-fatal errors continue executing the loop, which will
2775 bring them to "while" statement at the end, to judge
2776 whether the number of tries was exceeded. */
2777 printwhat (count, opt.ntry);
2779 case FWRITEERR: case FOPENERR:
2780 /* Another fatal error. */
2781 logputs (LOG_VERBOSE, "\n");
2782 logprintf (LOG_NOTQUIET, _("Cannot write to %s (%s).\n"),
2783 quote (hstat.local_file), strerror (errno));
2784 case HOSTERR: case CONIMPOSSIBLE: case PROXERR: case AUTHFAILED:
2785 case SSLINITFAILED: case CONTNOTSUPPORTED: case VERIFCERTERR:
2786 /* Fatal errors just return from the function. */
2790 /* Another fatal error. */
2791 logprintf (LOG_NOTQUIET, _("Unable to establish SSL connection.\n"));
2795 /* Another fatal error. */
2796 logputs (LOG_VERBOSE, "\n");
2797 logprintf (LOG_NOTQUIET, _("Cannot unlink %s (%s).\n"),
2798 quote (hstat.local_file), strerror (errno));
2802 case NEWLOCATION_KEEP_POST:
2803 /* Return the new location to the caller. */
2806 logprintf (LOG_NOTQUIET,
2807 _("ERROR: Redirection (%d) without location.\n"),
2817 /* The file was already fully retrieved. */
2821 /* Deal with you later. */
2824 /* All possibilities should have been exhausted. */
2828 if (!(*dt & RETROKF))
2833 /* #### Ugly ugly ugly! */
2834 hurl = url_string (u, URL_AUTH_HIDE_PASSWD);
2835 logprintf (LOG_NONVERBOSE, "%s:\n", hurl);
2838 /* Fall back to GET if HEAD fails with a 500 or 501 error code. */
2840 && (hstat.statcode == 500 || hstat.statcode == 501))
2845 /* Maybe we should always keep track of broken links, not just in
2847 * Don't log error if it was UTF-8 encoded because we will try
2848 * once unencoded. */
2849 else if (opt.spider && !iri->utf8_encode)
2851 /* #### Again: ugly ugly ugly! */
2853 hurl = url_string (u, URL_AUTH_HIDE_PASSWD);
2854 nonexisting_url (hurl);
2855 logprintf (LOG_NOTQUIET, _("\
2856 Remote file does not exist -- broken link!!!\n"));
2860 logprintf (LOG_NOTQUIET, _("%s ERROR %d: %s.\n"),
2861 tms, hstat.statcode,
2862 quotearg_style (escape_quoting_style, hstat.error));
2864 logputs (LOG_VERBOSE, "\n");
2870 /* Did we get the time-stamp? */
2873 got_head = true; /* no more time-stamping */
2875 if (opt.timestamping && !hstat.remote_time)
2877 logputs (LOG_NOTQUIET, _("\
2878 Last-modified header missing -- time-stamps turned off.\n"));
2880 else if (hstat.remote_time)
2882 /* Convert the date-string into struct tm. */
2883 tmr = http_atotm (hstat.remote_time);
2884 if (tmr == (time_t) (-1))
2885 logputs (LOG_VERBOSE, _("\
2886 Last-modified header invalid -- time-stamp ignored.\n"));
2887 if (*dt & HEAD_ONLY)
2888 time_came_from_head = true;
2891 if (send_head_first)
2893 /* The time-stamping section. */
2894 if (opt.timestamping)
2896 if (hstat.orig_file_name) /* Perform the following
2897 checks only if the file
2899 download already exists. */
2901 if (hstat.remote_time &&
2902 tmr != (time_t) (-1))
2904 /* Now time-stamping can be used validly.
2905 Time-stamping means that if the sizes of
2906 the local and remote file match, and local
2907 file is newer than the remote file, it will
2908 not be retrieved. Otherwise, the normal
2909 download procedure is resumed. */
2910 if (hstat.orig_file_tstamp >= tmr)
2912 if (hstat.contlen == -1
2913 || hstat.orig_file_size == hstat.contlen)
2915 logprintf (LOG_VERBOSE, _("\
2916 Server file no newer than local file %s -- not retrieving.\n\n"),
2917 quote (hstat.orig_file_name));
2923 logprintf (LOG_VERBOSE, _("\
2924 The sizes do not match (local %s) -- retrieving.\n"),
2925 number_to_static_string (hstat.orig_file_size));
2930 force_full_retrieve = true;
2931 logputs (LOG_VERBOSE,
2932 _("Remote file is newer, retrieving.\n"));
2935 logputs (LOG_VERBOSE, "\n");
2939 /* free_hstat (&hstat); */
2940 hstat.timestamp_checked = true;
2945 bool finished = true;
2950 logputs (LOG_VERBOSE, _("\
2951 Remote file exists and could contain links to other resources -- retrieving.\n\n"));
2956 logprintf (LOG_VERBOSE, _("\
2957 Remote file exists but does not contain any link -- not retrieving.\n\n"));
2958 ret = RETROK; /* RETRUNNEEDED is not for caller. */
2965 logprintf (LOG_VERBOSE, _("\
2966 Remote file exists and could contain further links,\n\
2967 but recursion is disabled -- not retrieving.\n\n"));
2971 logprintf (LOG_VERBOSE, _("\
2972 Remote file exists.\n\n"));
2974 ret = RETROK; /* RETRUNNEEDED is not for caller. */
2979 logprintf (LOG_NONVERBOSE,
2980 _("%s URL: %s %2d %s\n"),
2981 tms, u->url, hstat.statcode,
2982 hstat.message ? quotearg_style (escape_quoting_style, hstat.message) : "");
2989 count = 0; /* the retrieve count for HEAD is reset */
2991 } /* send_head_first */
2994 if (opt.useservertimestamps
2995 && (tmr != (time_t) (-1))
2996 && ((hstat.len == hstat.contlen) ||
2997 ((hstat.res == 0) && (hstat.contlen == -1))))
2999 const char *fl = NULL;
3000 set_local_file (&fl, hstat.local_file);
3004 /* Reparse time header, in case it's changed. */
3005 if (time_came_from_head
3006 && hstat.remote_time && hstat.remote_time[0])
3008 newtmr = http_atotm (hstat.remote_time);
3009 if (newtmr != (time_t)-1)
3015 /* End of time-stamping section. */
3017 tmrate = retr_rate (hstat.rd_size, hstat.dltime);
3018 total_download_time += hstat.dltime;
3020 if (hstat.len == hstat.contlen)
3024 bool write_to_stdout = (opt.output_document && HYPHENP (opt.output_document));
3026 logprintf (LOG_VERBOSE,
3028 ? _("%s (%s) - written to stdout %s[%s/%s]\n\n")
3029 : _("%s (%s) - %s saved [%s/%s]\n\n"),
3031 write_to_stdout ? "" : quote (hstat.local_file),
3032 number_to_static_string (hstat.len),
3033 number_to_static_string (hstat.contlen));
3034 logprintf (LOG_NONVERBOSE,
3035 "%s URL:%s [%s/%s] -> \"%s\" [%d]\n",
3037 number_to_static_string (hstat.len),
3038 number_to_static_string (hstat.contlen),
3039 hstat.local_file, count);
3042 total_downloaded_bytes += hstat.rd_size;
3044 /* Remember that we downloaded the file for later ".orig" code. */
3045 if (*dt & ADDED_HTML_EXTENSION)
3046 downloaded_file (FILE_DOWNLOADED_AND_HTML_EXTENSION_ADDED, hstat.local_file);
3048 downloaded_file (FILE_DOWNLOADED_NORMALLY, hstat.local_file);
3053 else if (hstat.res == 0) /* No read error */
3055 if (hstat.contlen == -1) /* We don't know how much we were supposed
3056 to get, so assume we succeeded. */
3060 bool write_to_stdout = (opt.output_document && HYPHENP (opt.output_document));
3062 logprintf (LOG_VERBOSE,
3064 ? _("%s (%s) - written to stdout %s[%s]\n\n")
3065 : _("%s (%s) - %s saved [%s]\n\n"),
3067 write_to_stdout ? "" : quote (hstat.local_file),
3068 number_to_static_string (hstat.len));
3069 logprintf (LOG_NONVERBOSE,
3070 "%s URL:%s [%s] -> \"%s\" [%d]\n",
3071 tms, u->url, number_to_static_string (hstat.len),
3072 hstat.local_file, count);
3075 total_downloaded_bytes += hstat.rd_size;
3077 /* Remember that we downloaded the file for later ".orig" code. */
3078 if (*dt & ADDED_HTML_EXTENSION)
3079 downloaded_file (FILE_DOWNLOADED_AND_HTML_EXTENSION_ADDED, hstat.local_file);
3081 downloaded_file (FILE_DOWNLOADED_NORMALLY, hstat.local_file);
3086 else if (hstat.len < hstat.contlen) /* meaning we lost the
3087 connection too soon */
3089 logprintf (LOG_VERBOSE,
3090 _("%s (%s) - Connection closed at byte %s. "),
3091 tms, tmrate, number_to_static_string (hstat.len));
3092 printwhat (count, opt.ntry);
3095 else if (hstat.len != hstat.restval)
3096 /* Getting here would mean reading more data than
3097 requested with content-length, which we never do. */
3101 /* Getting here probably means that the content-length was
3102 * _less_ than the original, local size. We should probably
3103 * truncate or re-read, or something. FIXME */
3108 else /* from now on hstat.res can only be -1 */
3110 if (hstat.contlen == -1)
3112 logprintf (LOG_VERBOSE,
3113 _("%s (%s) - Read error at byte %s (%s)."),
3114 tms, tmrate, number_to_static_string (hstat.len),
3116 printwhat (count, opt.ntry);
3119 else /* hstat.res == -1 and contlen is given */
3121 logprintf (LOG_VERBOSE,
3122 _("%s (%s) - Read error at byte %s/%s (%s). "),
3124 number_to_static_string (hstat.len),
3125 number_to_static_string (hstat.contlen),
3127 printwhat (count, opt.ntry);
3133 while (!opt.ntry || (count < opt.ntry));
3136 if (ret == RETROK && local_file)
3137 *local_file = xstrdup (hstat.local_file);
3138 free_hstat (&hstat);
3143 /* Check whether the result of strptime() indicates success.
3144 strptime() returns the pointer to how far it got to in the string.
3145 The processing has been successful if the string is at `GMT' or
3146 `+X', or at the end of the string.
3148 In extended regexp parlance, the function returns 1 if P matches
3149 "^ *(GMT|[+-][0-9]|$)", 0 otherwise. P being NULL (which strptime
3150 can return) is considered a failure and 0 is returned. */
3152 check_end (const char *p)
3156 while (c_isspace (*p))
3159 || (p[0] == 'G' && p[1] == 'M' && p[2] == 'T')
3160 || ((p[0] == '+' || p[0] == '-') && c_isdigit (p[1])))
3166 /* Convert the textual specification of time in TIME_STRING to the
3167 number of seconds since the Epoch.
3169 TIME_STRING can be in any of the three formats RFC2616 allows the
3170 HTTP servers to emit -- RFC1123-date, RFC850-date or asctime-date,
3171 as well as the time format used in the Set-Cookie header.
3172 Timezones are ignored, and should be GMT.
3174 Return the computed time_t representation, or -1 if the conversion
3177 This function uses strptime with various string formats for parsing
3178 TIME_STRING. This results in a parser that is not as lenient in
3179 interpreting TIME_STRING as I would like it to be. Being based on
3180 strptime, it always allows shortened months, one-digit days, etc.,
3181 but due to the multitude of formats in which time can be
3182 represented, an ideal HTTP time parser would be even more
3183 forgiving. It should completely ignore things like week days and
3184 concentrate only on the various forms of representing years,
3185 months, days, hours, minutes, and seconds. For example, it would
3186 be nice if it accepted ISO 8601 out of the box.
3188 I've investigated free and PD code for this purpose, but none was
3189 usable. getdate was big and unwieldy, and had potential copyright
3190 issues, or so I was informed. Dr. Marcus Hennecke's atotm(),
3191 distributed with phttpd, is excellent, but we cannot use it because
3192 it is not assigned to the FSF. So I stuck it with strptime. */
3195 http_atotm (const char *time_string)
3197 /* NOTE: Solaris strptime man page claims that %n and %t match white
3198 space, but that's not universally available. Instead, we simply
3199 use ` ' to mean "skip all WS", which works under all strptime
3200 implementations I've tested. */
3202 static const char *time_formats[] = {
3203 "%a, %d %b %Y %T", /* rfc1123: Thu, 29 Jan 1998 22:12:57 */
3204 "%A, %d-%b-%y %T", /* rfc850: Thursday, 29-Jan-98 22:12:57 */
3205 "%a %b %d %T %Y", /* asctime: Thu Jan 29 22:12:57 1998 */
3206 "%a, %d-%b-%Y %T" /* cookies: Thu, 29-Jan-1998 22:12:57
3207 (used in Set-Cookie, defined in the
3208 Netscape cookie specification.) */
3210 const char *oldlocale;
3211 char savedlocale[256];
3213 time_t ret = (time_t) -1;
3215 /* Solaris strptime fails to recognize English month names in
3216 non-English locales, which we work around by temporarily setting
3217 locale to C before invoking strptime. */
3218 oldlocale = setlocale (LC_TIME, NULL);
3221 size_t l = strlen (oldlocale) + 1;
3222 if (l >= sizeof savedlocale)
3223 savedlocale[0] = '\0';
3225 memcpy (savedlocale, oldlocale, l);
3227 else savedlocale[0] = '\0';
3229 setlocale (LC_TIME, "C");
3231 for (i = 0; i < countof (time_formats); i++)
3235 /* Some versions of strptime use the existing contents of struct
3236 tm to recalculate the date according to format. Zero it out
3237 to prevent stack garbage from influencing strptime. */
3240 if (check_end (strptime (time_string, time_formats[i], &t)))
3247 /* Restore the previous locale. */
3249 setlocale (LC_TIME, savedlocale);
3254 /* Authorization support: We support three authorization schemes:
3256 * `Basic' scheme, consisting of base64-ing USER:PASSWORD string;
3258 * `Digest' scheme, added by Junio Hamano <junio@twinsun.com>,
3259 consisting of answering to the server's challenge with the proper
3262 * `NTLM' ("NT Lan Manager") scheme, based on code written by Daniel
3263 Stenberg for libcurl. Like digest, NTLM is based on a
3264 challenge-response mechanism, but unlike digest, it is non-standard
3265 (authenticates TCP connections rather than requests), undocumented
3266 and Microsoft-specific. */
3268 /* Create the authentication header contents for the `Basic' scheme.
3269 This is done by encoding the string "USER:PASS" to base64 and
3270 prepending the string "Basic " in front of it. */
3273 basic_authentication_encode (const char *user, const char *passwd)
3276 int len1 = strlen (user) + 1 + strlen (passwd);
3278 t1 = (char *)alloca (len1 + 1);
3279 sprintf (t1, "%s:%s", user, passwd);
3281 t2 = (char *)alloca (BASE64_LENGTH (len1) + 1);
3282 base64_encode (t1, len1, t2);
3284 return concat_strings ("Basic ", t2, (char *) 0);
3287 #define SKIP_WS(x) do { \
3288 while (c_isspace (*(x))) \
3292 #ifdef ENABLE_DIGEST
3293 /* Dump the hexadecimal representation of HASH to BUF. HASH should be
3294 an array of 16 bytes containing the hash keys, and BUF should be a
3295 buffer of 33 writable characters (32 for hex digits plus one for
3296 zero termination). */
3298 dump_hash (char *buf, const unsigned char *hash)
3302 for (i = 0; i < MD5_DIGEST_SIZE; i++, hash++)
3304 *buf++ = XNUM_TO_digit (*hash >> 4);
3305 *buf++ = XNUM_TO_digit (*hash & 0xf);
3310 /* Take the line apart to find the challenge, and compose a digest
3311 authorization header. See RFC2069 section 2.1.2. */
3313 digest_authentication_encode (const char *au, const char *user,
3314 const char *passwd, const char *method,
3317 static char *realm, *opaque, *nonce;
3322 { "realm", &realm },
3323 { "opaque", &opaque },
3327 param_token name, value;
3329 realm = opaque = nonce = NULL;
3331 au += 6; /* skip over `Digest' */
3332 while (extract_param (&au, &name, &value, ','))
3335 size_t namelen = name.e - name.b;
3336 for (i = 0; i < countof (options); i++)
3337 if (namelen == strlen (options[i].name)
3338 && 0 == strncmp (name.b, options[i].name,
3341 *options[i].variable = strdupdelim (value.b, value.e);
3345 if (!realm || !nonce || !user || !passwd || !path || !method)
3348 xfree_null (opaque);
3353 /* Calculate the digest value. */
3356 unsigned char hash[MD5_DIGEST_SIZE];
3357 char a1buf[MD5_DIGEST_SIZE * 2 + 1], a2buf[MD5_DIGEST_SIZE * 2 + 1];
3358 char response_digest[MD5_DIGEST_SIZE * 2 + 1];
3360 /* A1BUF = H(user ":" realm ":" password) */
3361 md5_init_ctx (&ctx);
3362 md5_process_bytes ((unsigned char *)user, strlen (user), &ctx);
3363 md5_process_bytes ((unsigned char *)":", 1, &ctx);
3364 md5_process_bytes ((unsigned char *)realm, strlen (realm), &ctx);
3365 md5_process_bytes ((unsigned char *)":", 1, &ctx);
3366 md5_process_bytes ((unsigned char *)passwd, strlen (passwd), &ctx);
3367 md5_finish_ctx (&ctx, hash);
3368 dump_hash (a1buf, hash);
3370 /* A2BUF = H(method ":" path) */
3371 md5_init_ctx (&ctx);
3372 md5_process_bytes ((unsigned char *)method, strlen (method), &ctx);
3373 md5_process_bytes ((unsigned char *)":", 1, &ctx);
3374 md5_process_bytes ((unsigned char *)path, strlen (path), &ctx);
3375 md5_finish_ctx (&ctx, hash);
3376 dump_hash (a2buf, hash);
3378 /* RESPONSE_DIGEST = H(A1BUF ":" nonce ":" A2BUF) */
3379 md5_init_ctx (&ctx);
3380 md5_process_bytes ((unsigned char *)a1buf, MD5_DIGEST_SIZE * 2, &ctx);
3381 md5_process_bytes ((unsigned char *)":", 1, &ctx);
3382 md5_process_bytes ((unsigned char *)nonce, strlen (nonce), &ctx);
3383 md5_process_bytes ((unsigned char *)":", 1, &ctx);
3384 md5_process_bytes ((unsigned char *)a2buf, MD5_DIGEST_SIZE * 2, &ctx);
3385 md5_finish_ctx (&ctx, hash);
3386 dump_hash (response_digest, hash);
3388 res = xmalloc (strlen (user)
3393 + 2 * MD5_DIGEST_SIZE /*strlen (response_digest)*/
3394 + (opaque ? strlen (opaque) : 0)
3396 sprintf (res, "Digest \
3397 username=\"%s\", realm=\"%s\", nonce=\"%s\", uri=\"%s\", response=\"%s\"",
3398 user, realm, nonce, path, response_digest);
3401 char *p = res + strlen (res);
3402 strcat (p, ", opaque=\"");
3409 #endif /* ENABLE_DIGEST */
3411 /* Computing the size of a string literal must take into account that
3412 value returned by sizeof includes the terminating \0. */
3413 #define STRSIZE(literal) (sizeof (literal) - 1)
3415 /* Whether chars in [b, e) begin with the literal string provided as
3416 first argument and are followed by whitespace or terminating \0.
3417 The comparison is case-insensitive. */
3418 #define STARTS(literal, b, e) \
3420 && ((size_t) ((e) - (b))) >= STRSIZE (literal) \
3421 && 0 == strncasecmp (b, literal, STRSIZE (literal)) \
3422 && ((size_t) ((e) - (b)) == STRSIZE (literal) \
3423 || c_isspace (b[STRSIZE (literal)])))
3426 known_authentication_scheme_p (const char *hdrbeg, const char *hdrend)
3428 return STARTS ("Basic", hdrbeg, hdrend)
3429 #ifdef ENABLE_DIGEST
3430 || STARTS ("Digest", hdrbeg, hdrend)
3433 || STARTS ("NTLM", hdrbeg, hdrend)
3440 /* Create the HTTP authorization request header. When the
3441 `WWW-Authenticate' response header is seen, according to the
3442 authorization scheme specified in that header (`Basic' and `Digest'
3443 are supported by the current implementation), produce an
3444 appropriate HTTP authorization request header. */
3446 create_authorization_line (const char *au, const char *user,
3447 const char *passwd, const char *method,
3448 const char *path, bool *finished)
3450 /* We are called only with known schemes, so we can dispatch on the
3452 switch (c_toupper (*au))
3454 case 'B': /* Basic */
3456 return basic_authentication_encode (user, passwd);
3457 #ifdef ENABLE_DIGEST
3458 case 'D': /* Digest */
3460 return digest_authentication_encode (au, user, passwd, method, path);
3463 case 'N': /* NTLM */
3464 if (!ntlm_input (&pconn.ntlm, au))
3469 return ntlm_output (&pconn.ntlm, user, passwd, finished);
3472 /* We shouldn't get here -- this function should be only called
3473 with values approved by known_authentication_scheme_p. */
3481 if (!wget_cookie_jar)
3482 wget_cookie_jar = cookie_jar_new ();
3483 if (opt.cookies_input && !cookies_loaded_p)
3485 cookie_jar_load (wget_cookie_jar, opt.cookies_input);
3486 cookies_loaded_p = true;
3493 if (wget_cookie_jar)
3494 cookie_jar_save (wget_cookie_jar, opt.cookies_output);
3500 xfree_null (pconn.host);
3501 if (wget_cookie_jar)
3502 cookie_jar_delete (wget_cookie_jar);
3506 ensure_extension (struct http_stat *hs, const char *ext, int *dt)
3508 char *last_period_in_local_filename = strrchr (hs->local_file, '.');
3510 int len = strlen (ext);
3513 strncpy (shortext, ext, len - 1);
3514 shortext[len - 1] = '\0';
3517 if (last_period_in_local_filename == NULL
3518 || !(0 == strcasecmp (last_period_in_local_filename, shortext)
3519 || 0 == strcasecmp (last_period_in_local_filename, ext)))
3521 int local_filename_len = strlen (hs->local_file);
3522 /* Resize the local file, allowing for ".html" preceded by
3523 optional ".NUMBER". */
3524 hs->local_file = xrealloc (hs->local_file,
3525 local_filename_len + 24 + len);
3526 strcpy (hs->local_file + local_filename_len, ext);
3527 /* If clobbering is not allowed and the file, as named,
3528 exists, tack on ".NUMBER.html" instead. */
3529 if (!ALLOW_CLOBBER && file_exists_p (hs->local_file))
3533 sprintf (hs->local_file + local_filename_len,
3534 ".%d%s", ext_num++, ext);
3535 while (file_exists_p (hs->local_file));
3537 *dt |= ADDED_HTML_EXTENSION;
3545 test_parse_content_disposition()
3553 { "filename=\"file.ext\"", "file.ext", true },
3554 { "attachment; filename=\"file.ext\"", "file.ext", true },
3555 { "attachment; filename=\"file.ext\"; dummy", "file.ext", true },
3556 { "attachment", NULL, false },
3557 { "attachement; filename*=UTF-8'en-US'hello.txt", "hello.txt", true },
3558 { "attachement; filename*0=\"hello\"; filename*1=\"world.txt\"", "helloworld.txt", true },
3561 for (i = 0; i < sizeof(test_array)/sizeof(test_array[0]); ++i)
3566 res = parse_content_disposition (test_array[i].hdrval, &filename);
3568 mu_assert ("test_parse_content_disposition: wrong result",
3569 res == test_array[i].result
3571 || 0 == strcmp (test_array[i].filename, filename)));
3577 #endif /* TESTING */
3580 * vim: et sts=2 sw=2 cino+={s