2 Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004,
3 2005, 2006, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
5 This file is part of GNU Wget.
7 GNU Wget is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 GNU Wget is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with Wget. If not, see <http://www.gnu.org/licenses/>.
20 Additional permission under GNU GPL version 3 section 7
22 If you modify this program, or any covered work, by linking or
23 combining it with the OpenSSL project's OpenSSL library (or a
24 modified version of that library), containing parts covered by the
25 terms of the OpenSSL or SSLeay licenses, the Free Software Foundation
26 grants you additional permission to convey the resulting work.
27 Corresponding Source for a non-source form of such a combination
28 shall include the source code for the parts of OpenSSL used as well
29 as that of the covered work. */
56 # include "http-ntlm.h"
69 #endif /* def __VMS */
71 extern char *version_string;
75 static char *create_authorization_line (const char *, const char *,
76 const char *, const char *,
77 const char *, bool *);
78 static char *basic_authentication_encode (const char *, const char *);
79 static bool known_authentication_scheme_p (const char *, const char *);
80 static void ensure_extension (struct http_stat *, const char *, int *);
81 static void load_cookies (void);
84 # define MIN(x, y) ((x) > (y) ? (y) : (x))
88 static bool cookies_loaded_p;
89 static struct cookie_jar *wget_cookie_jar;
91 #define TEXTHTML_S "text/html"
92 #define TEXTXHTML_S "application/xhtml+xml"
93 #define TEXTCSS_S "text/css"
95 /* Some status code validation macros: */
96 #define H_10X(x) (((x) >= 100) && ((x) < 200))
97 #define H_20X(x) (((x) >= 200) && ((x) < 300))
98 #define H_PARTIAL(x) ((x) == HTTP_STATUS_PARTIAL_CONTENTS)
99 #define H_REDIRECTED(x) ((x) == HTTP_STATUS_MOVED_PERMANENTLY \
100 || (x) == HTTP_STATUS_MOVED_TEMPORARILY \
101 || (x) == HTTP_STATUS_SEE_OTHER \
102 || (x) == HTTP_STATUS_TEMPORARY_REDIRECT)
104 /* HTTP/1.0 status codes from RFC1945, provided for reference. */
105 /* Successful 2xx. */
106 #define HTTP_STATUS_OK 200
107 #define HTTP_STATUS_CREATED 201
108 #define HTTP_STATUS_ACCEPTED 202
109 #define HTTP_STATUS_NO_CONTENT 204
110 #define HTTP_STATUS_PARTIAL_CONTENTS 206
112 /* Redirection 3xx. */
113 #define HTTP_STATUS_MULTIPLE_CHOICES 300
114 #define HTTP_STATUS_MOVED_PERMANENTLY 301
115 #define HTTP_STATUS_MOVED_TEMPORARILY 302
116 #define HTTP_STATUS_SEE_OTHER 303 /* from HTTP/1.1 */
117 #define HTTP_STATUS_NOT_MODIFIED 304
118 #define HTTP_STATUS_TEMPORARY_REDIRECT 307 /* from HTTP/1.1 */
120 /* Client error 4xx. */
121 #define HTTP_STATUS_BAD_REQUEST 400
122 #define HTTP_STATUS_UNAUTHORIZED 401
123 #define HTTP_STATUS_FORBIDDEN 403
124 #define HTTP_STATUS_NOT_FOUND 404
125 #define HTTP_STATUS_RANGE_NOT_SATISFIABLE 416
127 /* Server errors 5xx. */
128 #define HTTP_STATUS_INTERNAL 500
129 #define HTTP_STATUS_NOT_IMPLEMENTED 501
130 #define HTTP_STATUS_BAD_GATEWAY 502
131 #define HTTP_STATUS_UNAVAILABLE 503
134 rel_none, rel_name, rel_value, rel_both
141 struct request_header {
143 enum rp release_policy;
145 int hcount, hcapacity;
150 /* Create a new, empty request. At least request_set_method must be
151 called before the request can be used. */
153 static struct request *
156 struct request *req = xnew0 (struct request);
158 req->headers = xnew_array (struct request_header, req->hcapacity);
162 /* Set the request's method and its arguments. METH should be a
163 literal string (or it should outlive the request) because it will
164 not be freed. ARG will be freed by request_free. */
167 request_set_method (struct request *req, const char *meth, char *arg)
173 /* Return the method string passed with the last call to
174 request_set_method. */
177 request_method (const struct request *req)
182 /* Free one header according to the release policy specified with
183 request_set_header. */
186 release_header (struct request_header *hdr)
188 switch (hdr->release_policy)
205 /* Set the request named NAME to VALUE. Specifically, this means that
206 a "NAME: VALUE\r\n" header line will be used in the request. If a
207 header with the same name previously existed in the request, its
208 value will be replaced by this one. A NULL value means do nothing.
210 RELEASE_POLICY determines whether NAME and VALUE should be released
211 (freed) with request_free. Allowed values are:
213 - rel_none - don't free NAME or VALUE
214 - rel_name - free NAME when done
215 - rel_value - free VALUE when done
216 - rel_both - free both NAME and VALUE when done
218 Setting release policy is useful when arguments come from different
219 sources. For example:
221 // Don't free literal strings!
222 request_set_header (req, "Pragma", "no-cache", rel_none);
224 // Don't free a global variable, we'll need it later.
225 request_set_header (req, "Referer", opt.referer, rel_none);
227 // Value freshly allocated, free it when done.
228 request_set_header (req, "Range",
229 aprintf ("bytes=%s-", number_to_static_string (hs->restval)),
234 request_set_header (struct request *req, char *name, char *value,
235 enum rp release_policy)
237 struct request_header *hdr;
242 /* A NULL value is a no-op; if freeing the name is requested,
243 free it now to avoid leaks. */
244 if (release_policy == rel_name || release_policy == rel_both)
249 for (i = 0; i < req->hcount; i++)
251 hdr = &req->headers[i];
252 if (0 == strcasecmp (name, hdr->name))
254 /* Replace existing header. */
255 release_header (hdr);
258 hdr->release_policy = release_policy;
263 /* Install new header. */
265 if (req->hcount >= req->hcapacity)
267 req->hcapacity <<= 1;
268 req->headers = xrealloc (req->headers, req->hcapacity * sizeof (*hdr));
270 hdr = &req->headers[req->hcount++];
273 hdr->release_policy = release_policy;
276 /* Like request_set_header, but sets the whole header line, as
277 provided by the user using the `--header' option. For example,
278 request_set_user_header (req, "Foo: bar") works just like
279 request_set_header (req, "Foo", "bar"). */
282 request_set_user_header (struct request *req, const char *header)
285 const char *p = strchr (header, ':');
288 BOUNDED_TO_ALLOCA (header, p, name);
290 while (c_isspace (*p))
292 request_set_header (req, xstrdup (name), (char *) p, rel_name);
295 /* Remove the header with specified name from REQ. Returns true if
296 the header was actually removed, false otherwise. */
299 request_remove_header (struct request *req, char *name)
302 for (i = 0; i < req->hcount; i++)
304 struct request_header *hdr = &req->headers[i];
305 if (0 == strcasecmp (name, hdr->name))
307 release_header (hdr);
308 /* Move the remaining headers by one. */
309 if (i < req->hcount - 1)
310 memmove (hdr, hdr + 1, (req->hcount - i - 1) * sizeof (*hdr));
318 #define APPEND(p, str) do { \
319 int A_len = strlen (str); \
320 memcpy (p, str, A_len); \
324 /* Construct the request and write it to FD using fd_write. */
327 request_send (const struct request *req, int fd)
329 char *request_string, *p;
330 int i, size, write_error;
332 /* Count the request size. */
335 /* METHOD " " ARG " " "HTTP/1.0" "\r\n" */
336 size += strlen (req->method) + 1 + strlen (req->arg) + 1 + 8 + 2;
338 for (i = 0; i < req->hcount; i++)
340 struct request_header *hdr = &req->headers[i];
341 /* NAME ": " VALUE "\r\n" */
342 size += strlen (hdr->name) + 2 + strlen (hdr->value) + 2;
348 p = request_string = alloca_array (char, size);
350 /* Generate the request. */
352 APPEND (p, req->method); *p++ = ' ';
353 APPEND (p, req->arg); *p++ = ' ';
354 memcpy (p, "HTTP/1.1\r\n", 10); p += 10;
356 for (i = 0; i < req->hcount; i++)
358 struct request_header *hdr = &req->headers[i];
359 APPEND (p, hdr->name);
360 *p++ = ':', *p++ = ' ';
361 APPEND (p, hdr->value);
362 *p++ = '\r', *p++ = '\n';
365 *p++ = '\r', *p++ = '\n', *p++ = '\0';
366 assert (p - request_string == size);
370 DEBUGP (("\n---request begin---\n%s---request end---\n", request_string));
372 /* Send the request to the server. */
374 write_error = fd_write (fd, request_string, size - 1, -1);
376 logprintf (LOG_VERBOSE, _("Failed writing HTTP request: %s.\n"),
381 /* Release the resources used by REQ. */
384 request_free (struct request *req)
387 xfree_null (req->arg);
388 for (i = 0; i < req->hcount; i++)
389 release_header (&req->headers[i]);
390 xfree_null (req->headers);
394 static struct hash_table *basic_authed_hosts;
396 /* Find out if this host has issued a Basic challenge yet; if so, give
397 * it the username, password. A temporary measure until we can get
398 * proper authentication in place. */
401 maybe_send_basic_creds (const char *hostname, const char *user,
402 const char *passwd, struct request *req)
404 bool do_challenge = false;
406 if (opt.auth_without_challenge)
408 DEBUGP (("Auth-without-challenge set, sending Basic credentials.\n"));
411 else if (basic_authed_hosts
412 && hash_table_contains(basic_authed_hosts, hostname))
414 DEBUGP (("Found %s in basic_authed_hosts.\n", quote (hostname)));
419 DEBUGP (("Host %s has not issued a general basic challenge.\n",
424 request_set_header (req, "Authorization",
425 basic_authentication_encode (user, passwd),
432 register_basic_auth_host (const char *hostname)
434 if (!basic_authed_hosts)
436 basic_authed_hosts = make_nocase_string_hash_table (1);
438 if (!hash_table_contains(basic_authed_hosts, hostname))
440 hash_table_put (basic_authed_hosts, xstrdup(hostname), NULL);
441 DEBUGP (("Inserted %s into basic_authed_hosts\n", quote (hostname)));
446 /* Send the contents of FILE_NAME to SOCK. Make sure that exactly
447 PROMISED_SIZE bytes are sent over the wire -- if the file is
448 longer, read only that much; if the file is shorter, report an error. */
451 post_file (int sock, const char *file_name, wgint promised_size)
453 static char chunk[8192];
458 DEBUGP (("[writing POST file %s ... ", file_name));
460 fp = fopen (file_name, "rb");
463 while (!feof (fp) && written < promised_size)
466 int length = fread (chunk, 1, sizeof (chunk), fp);
469 towrite = MIN (promised_size - written, length);
470 write_error = fd_write (sock, chunk, towrite, -1);
480 /* If we've written less than was promised, report a (probably
481 nonsensical) error rather than break the promise. */
482 if (written < promised_size)
488 assert (written == promised_size);
489 DEBUGP (("done]\n"));
493 /* Determine whether [START, PEEKED + PEEKLEN) contains an empty line.
494 If so, return the pointer to the position after the line, otherwise
495 return NULL. This is used as callback to fd_read_hunk. The data
496 between START and PEEKED has been read and cannot be "unread"; the
497 data after PEEKED has only been peeked. */
500 response_head_terminator (const char *start, const char *peeked, int peeklen)
504 /* If at first peek, verify whether HUNK starts with "HTTP". If
505 not, this is a HTTP/0.9 request and we must bail out without
507 if (start == peeked && 0 != memcmp (start, "HTTP", MIN (peeklen, 4)))
510 /* Look for "\n[\r]\n", and return the following position if found.
511 Start two chars before the current to cover the possibility that
512 part of the terminator (e.g. "\n\r") arrived in the previous
514 p = peeked - start < 2 ? start : peeked - 2;
515 end = peeked + peeklen;
517 /* Check for \n\r\n or \n\n anywhere in [p, end-2). */
518 for (; p < end - 2; p++)
521 if (p[1] == '\r' && p[2] == '\n')
523 else if (p[1] == '\n')
526 /* p==end-2: check for \n\n directly preceding END. */
527 if (p[0] == '\n' && p[1] == '\n')
533 /* The maximum size of a single HTTP response we care to read. Rather
534 than being a limit of the reader implementation, this limit
535 prevents Wget from slurping all available memory upon encountering
536 malicious or buggy server output, thus protecting the user. Define
537 it to 0 to remove the limit. */
539 #define HTTP_RESPONSE_MAX_SIZE 65536
541 /* Read the HTTP request head from FD and return it. The error
542 conditions are the same as with fd_read_hunk.
544 To support HTTP/0.9 responses, this function tries to make sure
545 that the data begins with "HTTP". If this is not the case, no data
546 is read and an empty request is returned, so that the remaining
547 data can be treated as body. */
550 read_http_response_head (int fd)
552 return fd_read_hunk (fd, response_head_terminator, 512,
553 HTTP_RESPONSE_MAX_SIZE);
557 /* The response data. */
560 /* The array of pointers that indicate where each header starts.
561 For example, given this HTTP response:
568 The headers are located like this:
570 "HTTP/1.0 200 Ok\r\nDescription: some\r\n text\r\nEtag: x\r\n\r\n"
572 headers[0] headers[1] headers[2] headers[3]
574 I.e. headers[0] points to the beginning of the request,
575 headers[1] points to the end of the first header and the
576 beginning of the second one, etc. */
578 const char **headers;
581 /* Create a new response object from the text of the HTTP response,
582 available in HEAD. That text is automatically split into
583 constituent header lines for fast retrieval using
586 static struct response *
587 resp_new (const char *head)
592 struct response *resp = xnew0 (struct response);
597 /* Empty head means that we're dealing with a headerless
598 (HTTP/0.9) response. In that case, don't set HEADERS at
603 /* Split HEAD into header lines, so that resp_header_* functions
604 don't need to do this over and over again. */
610 DO_REALLOC (resp->headers, size, count + 1, const char *);
611 resp->headers[count++] = hdr;
613 /* Break upon encountering an empty line. */
614 if (!hdr[0] || (hdr[0] == '\r' && hdr[1] == '\n') || hdr[0] == '\n')
617 /* Find the end of HDR, including continuations. */
620 const char *end = strchr (hdr, '\n');
626 while (*hdr == ' ' || *hdr == '\t');
628 DO_REALLOC (resp->headers, size, count + 1, const char *);
629 resp->headers[count] = NULL;
634 /* Locate the header named NAME in the request data, starting with
635 position START. This allows the code to loop through the request
636 data, filtering for all requests of a given name. Returns the
637 found position, or -1 for failure. The code that uses this
638 function typically looks like this:
640 for (pos = 0; (pos = resp_header_locate (...)) != -1; pos++)
641 ... do something with header ...
643 If you only care about one header, use resp_header_get instead of
647 resp_header_locate (const struct response *resp, const char *name, int start,
648 const char **begptr, const char **endptr)
651 const char **headers = resp->headers;
654 if (!headers || !headers[1])
657 name_len = strlen (name);
663 for (; headers[i + 1]; i++)
665 const char *b = headers[i];
666 const char *e = headers[i + 1];
668 && b[name_len] == ':'
669 && 0 == strncasecmp (b, name, name_len))
672 while (b < e && c_isspace (*b))
674 while (b < e && c_isspace (e[-1]))
684 /* Find and retrieve the header named NAME in the request data. If
685 found, set *BEGPTR to its starting, and *ENDPTR to its ending
686 position, and return true. Otherwise return false.
688 This function is used as a building block for resp_header_copy
689 and resp_header_strdup. */
692 resp_header_get (const struct response *resp, const char *name,
693 const char **begptr, const char **endptr)
695 int pos = resp_header_locate (resp, name, 0, begptr, endptr);
699 /* Copy the response header named NAME to buffer BUF, no longer than
700 BUFSIZE (BUFSIZE includes the terminating 0). If the header
701 exists, true is returned, false otherwise. If there should be no
702 limit on the size of the header, use resp_header_strdup instead.
704 If BUFSIZE is 0, no data is copied, but the boolean indication of
705 whether the header is present is still returned. */
708 resp_header_copy (const struct response *resp, const char *name,
709 char *buf, int bufsize)
712 if (!resp_header_get (resp, name, &b, &e))
716 int len = MIN (e - b, bufsize - 1);
717 memcpy (buf, b, len);
723 /* Return the value of header named NAME in RESP, allocated with
724 malloc. If such a header does not exist in RESP, return NULL. */
727 resp_header_strdup (const struct response *resp, const char *name)
730 if (!resp_header_get (resp, name, &b, &e))
732 return strdupdelim (b, e);
735 /* Parse the HTTP status line, which is of format:
737 HTTP-Version SP Status-Code SP Reason-Phrase
739 The function returns the status-code, or -1 if the status line
740 appears malformed. The pointer to "reason-phrase" message is
741 returned in *MESSAGE. */
744 resp_status (const struct response *resp, char **message)
751 /* For a HTTP/0.9 response, assume status 200. */
753 *message = xstrdup (_("No headers, assuming HTTP/0.9"));
757 p = resp->headers[0];
758 end = resp->headers[1];
764 if (end - p < 4 || 0 != strncmp (p, "HTTP", 4))
768 /* Match the HTTP version. This is optional because Gnutella
769 servers have been reported to not specify HTTP version. */
770 if (p < end && *p == '/')
773 while (p < end && c_isdigit (*p))
775 if (p < end && *p == '.')
777 while (p < end && c_isdigit (*p))
781 while (p < end && c_isspace (*p))
783 if (end - p < 3 || !c_isdigit (p[0]) || !c_isdigit (p[1]) || !c_isdigit (p[2]))
786 status = 100 * (p[0] - '0') + 10 * (p[1] - '0') + (p[2] - '0');
791 while (p < end && c_isspace (*p))
793 while (p < end && c_isspace (end[-1]))
795 *message = strdupdelim (p, end);
801 /* Release the resources used by RESP. */
804 resp_free (struct response *resp)
806 xfree_null (resp->headers);
810 /* Print a single line of response, the characters [b, e). We tried
812 logprintf (LOG_VERBOSE, "%s%.*s\n", prefix, (int) (e - b), b);
813 but that failed to escape the non-printable characters and, in fact,
814 caused crashes in UTF-8 locales. */
817 print_response_line(const char *prefix, const char *b, const char *e)
820 BOUNDED_TO_ALLOCA(b, e, copy);
821 logprintf (LOG_ALWAYS, "%s%s\n", prefix,
822 quotearg_style (escape_quoting_style, copy));
825 /* Print the server response, line by line, omitting the trailing CRLF
826 from individual header lines, and prefixed with PREFIX. */
829 print_server_response (const struct response *resp, const char *prefix)
834 for (i = 0; resp->headers[i + 1]; i++)
836 const char *b = resp->headers[i];
837 const char *e = resp->headers[i + 1];
839 if (b < e && e[-1] == '\n')
841 if (b < e && e[-1] == '\r')
843 print_response_line(prefix, b, e);
847 /* Parse the `Content-Range' header and extract the information it
848 contains. Returns true if successful, false otherwise. */
850 parse_content_range (const char *hdr, wgint *first_byte_ptr,
851 wgint *last_byte_ptr, wgint *entity_length_ptr)
855 /* Ancient versions of Netscape proxy server, presumably predating
856 rfc2068, sent out `Content-Range' without the "bytes"
858 if (0 == strncasecmp (hdr, "bytes", 5))
861 /* "JavaWebServer/1.1.1" sends "bytes: x-y/z", contrary to the
865 while (c_isspace (*hdr))
870 if (!c_isdigit (*hdr))
872 for (num = 0; c_isdigit (*hdr); hdr++)
873 num = 10 * num + (*hdr - '0');
874 if (*hdr != '-' || !c_isdigit (*(hdr + 1)))
876 *first_byte_ptr = num;
878 for (num = 0; c_isdigit (*hdr); hdr++)
879 num = 10 * num + (*hdr - '0');
880 if (*hdr != '/' || !c_isdigit (*(hdr + 1)))
882 *last_byte_ptr = num;
887 for (num = 0; c_isdigit (*hdr); hdr++)
888 num = 10 * num + (*hdr - '0');
889 *entity_length_ptr = num;
893 /* Read the body of the request, but don't store it anywhere and don't
894 display a progress gauge. This is useful for reading the bodies of
895 administrative responses to which we will soon issue another
896 request. The response is not useful to the user, but reading it
897 allows us to continue using the same connection to the server.
899 If reading fails, false is returned, true otherwise. In debug
900 mode, the body is displayed for debugging purposes. */
903 skip_short_body (int fd, wgint contlen, bool chunked)
906 SKIP_SIZE = 512, /* size of the download buffer */
907 SKIP_THRESHOLD = 4096 /* the largest size we read */
909 wgint remaining_chunk_size = 0;
910 char dlbuf[SKIP_SIZE + 1];
911 dlbuf[SKIP_SIZE] = '\0'; /* so DEBUGP can safely print it */
913 assert (contlen != -1 || contlen);
915 /* If the body is too large, it makes more sense to simply close the
916 connection than to try to read the body. */
917 if (contlen > SKIP_THRESHOLD)
920 while (contlen > 0 || chunked)
925 if (remaining_chunk_size == 0)
927 char *line = fd_read_line (fd);
935 remaining_chunk_size = strtol (line, &endl, 16);
936 if (remaining_chunk_size == 0)
939 if (fd_read_line (fd) == NULL)
945 contlen = MIN (remaining_chunk_size, SKIP_SIZE);
948 DEBUGP (("Skipping %s bytes of body: [", number_to_static_string (contlen)));
950 ret = fd_read (fd, dlbuf, MIN (contlen, SKIP_SIZE), -1);
953 /* Don't normally report the error since this is an
954 optimization that should be invisible to the user. */
955 DEBUGP (("] aborting (%s).\n",
956 ret < 0 ? fd_errstr (fd) : "EOF received"));
963 remaining_chunk_size -= ret;
964 if (remaining_chunk_size == 0)
965 if (fd_read_line (fd) == NULL)
969 /* Safe even if %.*s bogusly expects terminating \0 because
970 we've zero-terminated dlbuf above. */
971 DEBUGP (("%.*s", ret, dlbuf));
974 DEBUGP (("] done.\n"));
978 #define NOT_RFC2231 0
979 #define RFC2231_NOENCODING 1
980 #define RFC2231_ENCODING 2
982 /* extract_param extracts the parameter name into NAME.
983 However, if the parameter name is in RFC2231 format then
984 this function adjusts NAME by stripping of the trailing
985 characters that are not part of the name but are present to
986 indicate the presence of encoding information in the value
987 or a fragment of a long parameter value
990 modify_param_name(param_token *name)
992 const char *delim1 = memchr (name->b, '*', name->e - name->b);
993 const char *delim2 = memrchr (name->b, '*', name->e - name->b);
999 result = NOT_RFC2231;
1001 else if(delim1 == delim2)
1003 if ((name->e - 1) == delim1)
1005 result = RFC2231_ENCODING;
1009 result = RFC2231_NOENCODING;
1016 result = RFC2231_ENCODING;
1021 /* extract_param extract the paramater value into VALUE.
1022 Like modify_param_name this function modifies VALUE by
1023 stripping off the encoding information from the actual value
1026 modify_param_value (param_token *value, int encoding_type )
1028 if (RFC2231_ENCODING == encoding_type)
1030 const char *delim = memrchr (value->b, '\'', value->e - value->b);
1031 if ( delim != NULL )
1033 value->b = (delim+1);
1038 /* Extract a parameter from the string (typically an HTTP header) at
1039 **SOURCE and advance SOURCE to the next parameter. Return false
1040 when there are no more parameters to extract. The name of the
1041 parameter is returned in NAME, and the value in VALUE. If the
1042 parameter has no value, the token's value is zeroed out.
1044 For example, if *SOURCE points to the string "attachment;
1045 filename=\"foo bar\"", the first call to this function will return
1046 the token named "attachment" and no value, and the second call will
1047 return the token named "filename" and value "foo bar". The third
1048 call will return false, indicating no more valid tokens. */
1051 extract_param (const char **source, param_token *name, param_token *value,
1054 const char *p = *source;
1056 while (c_isspace (*p)) ++p;
1060 return false; /* no error; nothing more to extract */
1065 while (*p && !c_isspace (*p) && *p != '=' && *p != separator) ++p;
1067 if (name->b == name->e)
1068 return false; /* empty name: error */
1069 while (c_isspace (*p)) ++p;
1070 if (*p == separator || !*p) /* no value */
1073 if (*p == separator) ++p;
1078 return false; /* error */
1080 /* *p is '=', extract value */
1082 while (c_isspace (*p)) ++p;
1083 if (*p == '"') /* quoted */
1086 while (*p && *p != '"') ++p;
1090 /* Currently at closing quote; find the end of param. */
1091 while (c_isspace (*p)) ++p;
1092 while (*p && *p != separator) ++p;
1093 if (*p == separator)
1096 /* garbage after closed quote, e.g. foo="bar"baz */
1102 while (*p && *p != separator) ++p;
1104 while (value->e != value->b && c_isspace (value->e[-1]))
1106 if (*p == separator) ++p;
1110 int param_type = modify_param_name(name);
1111 if (NOT_RFC2231 != param_type)
1113 modify_param_value(value, param_type);
1119 #undef RFC2231_NOENCODING
1120 #undef RFC2231_ENCODING
1122 /* Appends the string represented by VALUE to FILENAME */
1125 append_value_to_filename (char **filename, param_token const * const value)
1127 int original_length = strlen(*filename);
1128 int new_length = strlen(*filename) + (value->e - value->b);
1129 *filename = xrealloc (*filename, new_length+1);
1130 memcpy (*filename + original_length, value->b, (value->e - value->b));
1131 (*filename)[new_length] = '\0';
1135 #define MAX(p, q) ((p) > (q) ? (p) : (q))
1137 /* Parse the contents of the `Content-Disposition' header, extracting
1138 the information useful to Wget. Content-Disposition is a header
1139 borrowed from MIME; when used in HTTP, it typically serves for
1140 specifying the desired file name of the resource. For example:
1142 Content-Disposition: attachment; filename="flora.jpg"
1144 Wget will skip the tokens it doesn't care about, such as
1145 "attachment" in the previous example; it will also skip other
1146 unrecognized params. If the header is syntactically correct and
1147 contains a file name, a copy of the file name is stored in
1148 *filename and true is returned. Otherwise, the function returns
1151 The file name is stripped of directory components and must not be
1154 Historically, this function returned filename prefixed with opt.dir_prefix,
1155 now that logic is handled by the caller, new code should pay attention,
1156 changed by crq, Sep 2010.
1160 parse_content_disposition (const char *hdr, char **filename)
1162 param_token name, value;
1164 while (extract_param (&hdr, &name, &value, ';'))
1166 int isFilename = BOUNDED_EQUAL_NO_CASE ( name.b, name.e, "filename" );
1167 if ( isFilename && value.b != NULL)
1169 /* Make the file name begin at the last slash or backslash. */
1170 const char *last_slash = memrchr (value.b, '/', value.e - value.b);
1171 const char *last_bs = memrchr (value.b, '\\', value.e - value.b);
1172 if (last_slash && last_bs)
1173 value.b = 1 + MAX (last_slash, last_bs);
1174 else if (last_slash || last_bs)
1175 value.b = 1 + (last_slash ? last_slash : last_bs);
1176 if (value.b == value.e)
1180 append_value_to_filename (filename, &value);
1182 *filename = strdupdelim (value.b, value.e);
1193 /* Persistent connections. Currently, we cache the most recently used
1194 connection as persistent, provided that the HTTP server agrees to
1195 make it such. The persistence data is stored in the variables
1196 below. Ideally, it should be possible to cache an arbitrary fixed
1197 number of these connections. */
1199 /* Whether a persistent connection is active. */
1200 static bool pconn_active;
1203 /* The socket of the connection. */
1206 /* Host and port of the currently active persistent connection. */
1210 /* Whether a ssl handshake has occoured on this connection. */
1213 /* Whether the connection was authorized. This is only done by
1214 NTLM, which authorizes *connections* rather than individual
1215 requests. (That practice is peculiar for HTTP, but it is a
1216 useful optimization.) */
1220 /* NTLM data of the current connection. */
1221 struct ntlmdata ntlm;
1225 /* Mark the persistent connection as invalid and free the resources it
1226 uses. This is used by the CLOSE_* macros after they forcefully
1227 close a registered persistent connection. */
1230 invalidate_persistent (void)
1232 DEBUGP (("Disabling further reuse of socket %d.\n", pconn.socket));
1233 pconn_active = false;
1234 fd_close (pconn.socket);
1239 /* Register FD, which should be a TCP/IP connection to HOST:PORT, as
1240 persistent. This will enable someone to use the same connection
1241 later. In the context of HTTP, this must be called only AFTER the
1242 response has been received and the server has promised that the
1243 connection will remain alive.
1245 If a previous connection was persistent, it is closed. */
1248 register_persistent (const char *host, int port, int fd, bool ssl)
1252 if (pconn.socket == fd)
1254 /* The connection FD is already registered. */
1259 /* The old persistent connection is still active; close it
1260 first. This situation arises whenever a persistent
1261 connection exists, but we then connect to a different
1262 host, and try to register a persistent connection to that
1264 invalidate_persistent ();
1268 pconn_active = true;
1270 pconn.host = xstrdup (host);
1273 pconn.authorized = false;
1275 DEBUGP (("Registered socket %d for persistent reuse.\n", fd));
1278 /* Return true if a persistent connection is available for connecting
1282 persistent_available_p (const char *host, int port, bool ssl,
1283 bool *host_lookup_failed)
1285 /* First, check whether a persistent connection is active at all. */
1289 /* If we want SSL and the last connection wasn't or vice versa,
1290 don't use it. Checking for host and port is not enough because
1291 HTTP and HTTPS can apparently coexist on the same port. */
1292 if (ssl != pconn.ssl)
1295 /* If we're not connecting to the same port, we're not interested. */
1296 if (port != pconn.port)
1299 /* If the host is the same, we're in business. If not, there is
1300 still hope -- read below. */
1301 if (0 != strcasecmp (host, pconn.host))
1303 /* Check if pconn.socket is talking to HOST under another name.
1304 This happens often when both sites are virtual hosts
1305 distinguished only by name and served by the same network
1306 interface, and hence the same web server (possibly set up by
1307 the ISP and serving many different web sites). This
1308 admittedly unconventional optimization does not contradict
1309 HTTP and works well with popular server software. */
1313 struct address_list *al;
1316 /* Don't try to talk to two different SSL sites over the same
1317 secure connection! (Besides, it's not clear that
1318 name-based virtual hosting is even possible with SSL.) */
1321 /* If pconn.socket's peer is one of the IP addresses HOST
1322 resolves to, pconn.socket is for all intents and purposes
1323 already talking to HOST. */
1325 if (!socket_ip_address (pconn.socket, &ip, ENDPOINT_PEER))
1327 /* Can't get the peer's address -- something must be very
1328 wrong with the connection. */
1329 invalidate_persistent ();
1332 al = lookup_host (host, 0);
1335 *host_lookup_failed = true;
1339 found = address_list_contains (al, &ip);
1340 address_list_release (al);
1345 /* The persistent connection's peer address was found among the
1346 addresses HOST resolved to; therefore, pconn.sock is in fact
1347 already talking to HOST -- no need to reconnect. */
1350 /* Finally, check whether the connection is still open. This is
1351 important because most servers implement liberal (short) timeout
1352 on persistent connections. Wget can of course always reconnect
1353 if the connection doesn't work out, but it's nicer to know in
1354 advance. This test is a logical followup of the first test, but
1355 is "expensive" and therefore placed at the end of the list.
1357 (Current implementation of test_socket_open has a nice side
1358 effect that it treats sockets with pending data as "closed".
1359 This is exactly what we want: if a broken server sends message
1360 body in response to HEAD, or if it sends more than conent-length
1361 data, we won't reuse the corrupted connection.) */
1363 if (!test_socket_open (pconn.socket))
1365 /* Oops, the socket is no longer open. Now that we know that,
1366 let's invalidate the persistent connection before returning
1368 invalidate_persistent ();
1375 /* The idea behind these two CLOSE macros is to distinguish between
1376 two cases: one when the job we've been doing is finished, and we
1377 want to close the connection and leave, and two when something is
1378 seriously wrong and we're closing the connection as part of
1381 In case of keep_alive, CLOSE_FINISH should leave the connection
1382 open, while CLOSE_INVALIDATE should still close it.
1384 Note that the semantics of the flag `keep_alive' is "this
1385 connection *will* be reused (the server has promised not to close
1386 the connection once we're done)", while the semantics of
1387 `pc_active_p && (fd) == pc_last_fd' is "we're *now* using an
1388 active, registered connection". */
1390 #define CLOSE_FINISH(fd) do { \
1393 if (pconn_active && (fd) == pconn.socket) \
1394 invalidate_persistent (); \
1403 #define CLOSE_INVALIDATE(fd) do { \
1404 if (pconn_active && (fd) == pconn.socket) \
1405 invalidate_persistent (); \
1413 wgint len; /* received length */
1414 wgint contlen; /* expected length */
1415 wgint restval; /* the restart value */
1416 int res; /* the result of last read */
1417 char *rderrmsg; /* error message from read error */
1418 char *newloc; /* new location (redirection) */
1419 char *remote_time; /* remote time-stamp string */
1420 char *error; /* textual HTTP error */
1421 int statcode; /* status code */
1422 char *message; /* status message */
1423 wgint rd_size; /* amount of data read from socket */
1424 double dltime; /* time it took to download the data */
1425 const char *referer; /* value of the referer header. */
1426 char *local_file; /* local file name. */
1427 bool existence_checked; /* true if we already checked for a file's
1428 existence after having begun to download
1429 (needed in gethttp for when connection is
1430 interrupted/restarted. */
1431 bool timestamp_checked; /* true if pre-download time-stamping checks
1432 * have already been performed */
1433 char *orig_file_name; /* name of file to compare for time-stamping
1434 * (might be != local_file if -K is set) */
1435 wgint orig_file_size; /* size of file to compare for time-stamping */
1436 time_t orig_file_tstamp; /* time-stamp of file to compare for
1441 free_hstat (struct http_stat *hs)
1443 xfree_null (hs->newloc);
1444 xfree_null (hs->remote_time);
1445 xfree_null (hs->error);
1446 xfree_null (hs->rderrmsg);
1447 xfree_null (hs->local_file);
1448 xfree_null (hs->orig_file_name);
1449 xfree_null (hs->message);
1451 /* Guard against being called twice. */
1453 hs->remote_time = NULL;
1457 #define BEGINS_WITH(line, string_constant) \
1458 (!strncasecmp (line, string_constant, sizeof (string_constant) - 1) \
1459 && (c_isspace (line[sizeof (string_constant) - 1]) \
1460 || !line[sizeof (string_constant) - 1]))
1463 #define SET_USER_AGENT(req) do { \
1464 if (!opt.useragent) \
1465 request_set_header (req, "User-Agent", \
1466 aprintf ("Wget/%s (VMS %s %s)", \
1467 version_string, vms_arch(), vms_vers()), \
1469 else if (*opt.useragent) \
1470 request_set_header (req, "User-Agent", opt.useragent, rel_none); \
1472 #else /* def __VMS */
1473 #define SET_USER_AGENT(req) do { \
1474 if (!opt.useragent) \
1475 request_set_header (req, "User-Agent", \
1476 aprintf ("Wget/%s (%s)", \
1477 version_string, OS_TYPE), \
1479 else if (*opt.useragent) \
1480 request_set_header (req, "User-Agent", opt.useragent, rel_none); \
1482 #endif /* def __VMS [else] */
1484 /* The flags that allow clobbering the file (opening with "wb").
1485 Defined here to avoid repetition later. #### This will require
1487 #define ALLOW_CLOBBER (opt.noclobber || opt.always_rest || opt.timestamping \
1488 || opt.dirstruct || opt.output_document)
1490 /* Retrieve a document through HTTP protocol. It recognizes status
1491 code, and correctly handles redirections. It closes the network
1492 socket. If it receives an error from the functions below it, it
1493 will print it if there is enough information to do so (almost
1494 always), returning the error to the caller (i.e. http_loop).
1496 Various HTTP parameters are stored to hs.
1498 If PROXY is non-NULL, the connection will be made to the proxy
1499 server, and u->url will be requested. */
1501 gethttp (struct url *u, struct http_stat *hs, int *dt, struct url *proxy,
1504 struct request *req;
1507 char *user, *passwd;
1511 wgint contlen, contrange;
1518 /* Set to 1 when the authorization has already been sent and should
1519 not be tried again. */
1520 bool auth_finished = false;
1522 /* Set to 1 when just globally-set Basic authorization has been sent;
1523 * should prevent further Basic negotiations, but not other
1525 bool basic_auth_finished = false;
1527 /* Whether NTLM authentication is used for this request. */
1528 bool ntlm_seen = false;
1530 /* Whether our connection to the remote host is through SSL. */
1531 bool using_ssl = false;
1533 /* Whether a HEAD request will be issued (as opposed to GET or
1535 bool head_only = !!(*dt & HEAD_ONLY);
1538 struct response *resp;
1542 /* Whether this connection will be kept alive after the HTTP request
1546 /* Is the server using the chunked transfer encoding? */
1547 bool chunked_transfer_encoding = false;
1549 /* Whether keep-alive should be inhibited. */
1550 bool inhibit_keep_alive =
1551 !opt.http_keep_alive || opt.ignore_length;
1553 /* Headers sent when using POST. */
1554 wgint post_data_size = 0;
1556 bool host_lookup_failed = false;
1559 if (u->scheme == SCHEME_HTTPS)
1561 /* Initialize the SSL context. After this has once been done,
1562 it becomes a no-op. */
1565 scheme_disable (SCHEME_HTTPS);
1566 logprintf (LOG_NOTQUIET,
1567 _("Disabling SSL due to encountered errors.\n"));
1568 return SSLINITFAILED;
1571 #endif /* HAVE_SSL */
1573 /* Initialize certain elements of struct http_stat. */
1577 hs->rderrmsg = NULL;
1579 hs->remote_time = NULL;
1585 /* Prepare the request to send. */
1587 req = request_new ();
1590 const char *meth = "GET";
1593 else if (opt.post_file_name || opt.post_data)
1595 /* Use the full path, i.e. one that includes the leading slash and
1596 the query string. E.g. if u->path is "foo/bar" and u->query is
1597 "param=value", full_path will be "/foo/bar?param=value". */
1600 /* When using SSL over proxy, CONNECT establishes a direct
1601 connection to the HTTPS server. Therefore use the same
1602 argument as when talking to the server directly. */
1603 && u->scheme != SCHEME_HTTPS
1606 meth_arg = xstrdup (u->url);
1608 meth_arg = url_full_path (u);
1609 request_set_method (req, meth, meth_arg);
1612 request_set_header (req, "Referer", (char *) hs->referer, rel_none);
1613 if (*dt & SEND_NOCACHE)
1614 request_set_header (req, "Pragma", "no-cache", rel_none);
1615 if (hs->restval && !opt.timestamping)
1616 request_set_header (req, "Range",
1617 aprintf ("bytes=%s-",
1618 number_to_static_string (hs->restval)),
1620 SET_USER_AGENT (req);
1621 request_set_header (req, "Accept", "*/*", rel_none);
1623 /* Find the username and password for authentication. */
1626 search_netrc (u->host, (const char **)&user, (const char **)&passwd, 0);
1627 user = user ? user : (opt.http_user ? opt.http_user : opt.user);
1628 passwd = passwd ? passwd : (opt.http_passwd ? opt.http_passwd : opt.passwd);
1630 /* We only do "site-wide" authentication with "global" user/password
1631 * values unless --auth-no-challange has been requested; URL user/password
1632 * info overrides. */
1633 if (user && passwd && (!u->user || opt.auth_without_challenge))
1635 /* If this is a host for which we've already received a Basic
1636 * challenge, we'll go ahead and send Basic authentication creds. */
1637 basic_auth_finished = maybe_send_basic_creds(u->host, user, passwd, req);
1640 /* Generate the Host header, HOST:PORT. Take into account that:
1642 - Broken server-side software often doesn't recognize the PORT
1643 argument, so we must generate "Host: www.server.com" instead of
1644 "Host: www.server.com:80" (and likewise for https port).
1646 - IPv6 addresses contain ":", so "Host: 3ffe:8100:200:2::2:1234"
1647 becomes ambiguous and needs to be rewritten as "Host:
1648 [3ffe:8100:200:2::2]:1234". */
1650 /* Formats arranged for hfmt[add_port][add_squares]. */
1651 static const char *hfmt[][2] = {
1652 { "%s", "[%s]" }, { "%s:%d", "[%s]:%d" }
1654 int add_port = u->port != scheme_default_port (u->scheme);
1655 int add_squares = strchr (u->host, ':') != NULL;
1656 request_set_header (req, "Host",
1657 aprintf (hfmt[add_port][add_squares], u->host, u->port),
1661 if (inhibit_keep_alive)
1662 request_set_header (req, "Connection", "Close", rel_none);
1666 request_set_header (req, "Connection", "Keep-Alive", rel_none);
1669 request_set_header (req, "Connection", "Close", rel_none);
1670 request_set_header (req, "Proxy-Connection", "Keep-Alive", rel_none);
1674 if (opt.post_data || opt.post_file_name)
1676 request_set_header (req, "Content-Type",
1677 "application/x-www-form-urlencoded", rel_none);
1679 post_data_size = strlen (opt.post_data);
1682 post_data_size = file_size (opt.post_file_name);
1683 if (post_data_size == -1)
1685 logprintf (LOG_NOTQUIET, _("POST data file %s missing: %s\n"),
1686 quote (opt.post_file_name), strerror (errno));
1690 request_set_header (req, "Content-Length",
1691 xstrdup (number_to_static_string (post_data_size)),
1696 /* We need to come back here when the initial attempt to retrieve
1697 without authorization header fails. (Expected to happen at least
1698 for the Digest authorization scheme.) */
1701 request_set_header (req, "Cookie",
1702 cookie_header (wget_cookie_jar,
1703 u->host, u->port, u->path,
1705 u->scheme == SCHEME_HTTPS
1712 /* Add the user headers. */
1713 if (opt.user_headers)
1716 for (i = 0; opt.user_headers[i]; i++)
1717 request_set_user_header (req, opt.user_headers[i]);
1723 char *proxy_user, *proxy_passwd;
1724 /* For normal username and password, URL components override
1725 command-line/wgetrc parameters. With proxy
1726 authentication, it's the reverse, because proxy URLs are
1727 normally the "permanent" ones, so command-line args
1728 should take precedence. */
1729 if (opt.proxy_user && opt.proxy_passwd)
1731 proxy_user = opt.proxy_user;
1732 proxy_passwd = opt.proxy_passwd;
1736 proxy_user = proxy->user;
1737 proxy_passwd = proxy->passwd;
1739 /* #### This does not appear right. Can't the proxy request,
1740 say, `Digest' authentication? */
1741 if (proxy_user && proxy_passwd)
1742 proxyauth = basic_authentication_encode (proxy_user, proxy_passwd);
1744 /* If we're using a proxy, we will be connecting to the proxy
1748 /* Proxy authorization over SSL is handled below. */
1750 if (u->scheme != SCHEME_HTTPS)
1752 request_set_header (req, "Proxy-Authorization", proxyauth, rel_value);
1757 /* Establish the connection. */
1759 if (inhibit_keep_alive)
1763 /* Look for a persistent connection to target host, unless a
1764 proxy is used. The exception is when SSL is in use, in which
1765 case the proxy is nothing but a passthrough to the target
1766 host, registered as a connection to the latter. */
1767 struct url *relevant = conn;
1769 if (u->scheme == SCHEME_HTTPS)
1773 if (persistent_available_p (relevant->host, relevant->port,
1775 relevant->scheme == SCHEME_HTTPS,
1779 &host_lookup_failed))
1781 sock = pconn.socket;
1782 using_ssl = pconn.ssl;
1783 logprintf (LOG_VERBOSE, _("Reusing existing connection to %s:%d.\n"),
1784 quotearg_style (escape_quoting_style, pconn.host),
1786 DEBUGP (("Reusing fd %d.\n", sock));
1787 if (pconn.authorized)
1788 /* If the connection is already authorized, the "Basic"
1789 authorization added by code above is unnecessary and
1791 request_remove_header (req, "Authorization");
1793 else if (host_lookup_failed)
1796 logprintf(LOG_NOTQUIET,
1797 _("%s: unable to resolve host address %s\n"),
1798 exec_name, quote (relevant->host));
1805 sock = connect_to_host (conn->host, conn->port);
1814 return (retryable_socket_connect_error (errno)
1815 ? CONERROR : CONIMPOSSIBLE);
1819 if (proxy && u->scheme == SCHEME_HTTPS)
1821 /* When requesting SSL URLs through proxies, use the
1822 CONNECT method to request passthrough. */
1823 struct request *connreq = request_new ();
1824 request_set_method (connreq, "CONNECT",
1825 aprintf ("%s:%d", u->host, u->port));
1826 SET_USER_AGENT (connreq);
1829 request_set_header (connreq, "Proxy-Authorization",
1830 proxyauth, rel_value);
1831 /* Now that PROXYAUTH is part of the CONNECT request,
1832 zero it out so we don't send proxy authorization with
1833 the regular request below. */
1836 /* Examples in rfc2817 use the Host header in CONNECT
1837 requests. I don't see how that gains anything, given
1838 that the contents of Host would be exactly the same as
1839 the contents of CONNECT. */
1841 write_error = request_send (connreq, sock);
1842 request_free (connreq);
1843 if (write_error < 0)
1845 CLOSE_INVALIDATE (sock);
1849 head = read_http_response_head (sock);
1852 logprintf (LOG_VERBOSE, _("Failed reading proxy response: %s\n"),
1854 CLOSE_INVALIDATE (sock);
1863 DEBUGP (("proxy responded with: [%s]\n", head));
1865 resp = resp_new (head);
1866 statcode = resp_status (resp, &message);
1869 char *tms = datetime_str (time (NULL));
1870 logprintf (LOG_VERBOSE, "%d\n", statcode);
1871 logprintf (LOG_NOTQUIET, _("%s ERROR %d: %s.\n"), tms, statcode,
1872 quotearg_style (escape_quoting_style,
1873 _("Malformed status line")));
1877 hs->message = xstrdup (message);
1880 if (statcode != 200)
1883 logprintf (LOG_NOTQUIET, _("Proxy tunneling failed: %s"),
1884 message ? quotearg_style (escape_quoting_style, message) : "?");
1885 xfree_null (message);
1888 xfree_null (message);
1890 /* SOCK is now *really* connected to u->host, so update CONN
1891 to reflect this. That way register_persistent will
1892 register SOCK as being connected to u->host:u->port. */
1896 if (conn->scheme == SCHEME_HTTPS)
1898 if (!ssl_connect_wget (sock))
1903 else if (!ssl_check_certificate (sock, u->host))
1906 return VERIFCERTERR;
1910 #endif /* HAVE_SSL */
1913 /* Send the request to server. */
1914 write_error = request_send (req, sock);
1916 if (write_error >= 0)
1920 DEBUGP (("[POST data: %s]\n", opt.post_data));
1921 write_error = fd_write (sock, opt.post_data, post_data_size, -1);
1923 else if (opt.post_file_name && post_data_size != 0)
1924 write_error = post_file (sock, opt.post_file_name, post_data_size);
1927 if (write_error < 0)
1929 CLOSE_INVALIDATE (sock);
1933 logprintf (LOG_VERBOSE, _("%s request sent, awaiting response... "),
1934 proxy ? "Proxy" : "HTTP");
1940 head = read_http_response_head (sock);
1945 logputs (LOG_NOTQUIET, _("No data received.\n"));
1946 CLOSE_INVALIDATE (sock);
1952 logprintf (LOG_NOTQUIET, _("Read error (%s) in headers.\n"),
1954 CLOSE_INVALIDATE (sock);
1959 DEBUGP (("\n---response begin---\n%s---response end---\n", head));
1961 resp = resp_new (head);
1963 /* Check for status line. */
1965 statcode = resp_status (resp, &message);
1968 char *tms = datetime_str (time (NULL));
1969 logprintf (LOG_VERBOSE, "%d\n", statcode);
1970 logprintf (LOG_NOTQUIET, _("%s ERROR %d: %s.\n"), tms, statcode,
1971 quotearg_style (escape_quoting_style,
1972 _("Malformed status line")));
1973 CLOSE_INVALIDATE (sock);
1978 if (H_10X (statcode))
1980 DEBUGP (("Ignoring response\n"));
1984 hs->message = xstrdup (message);
1985 if (!opt.server_response)
1986 logprintf (LOG_VERBOSE, "%2d %s\n", statcode,
1987 message ? quotearg_style (escape_quoting_style, message) : "");
1990 logprintf (LOG_VERBOSE, "\n");
1991 print_server_response (resp, " ");
1994 if (!opt.ignore_length
1995 && resp_header_copy (resp, "Content-Length", hdrval, sizeof (hdrval)))
1999 parsed = str_to_wgint (hdrval, NULL, 10);
2000 if (parsed == WGINT_MAX && errno == ERANGE)
2003 #### If Content-Length is out of range, it most likely
2004 means that the file is larger than 2G and that we're
2005 compiled without LFS. In that case we should probably
2006 refuse to even attempt to download the file. */
2009 else if (parsed < 0)
2011 /* Negative Content-Length; nonsensical, so we can't
2012 assume any information about the content to receive. */
2019 /* Check for keep-alive related responses. */
2020 if (!inhibit_keep_alive && contlen != -1)
2022 if (resp_header_copy (resp, "Connection", hdrval, sizeof (hdrval)))
2024 if (0 == strcasecmp (hdrval, "Close"))
2029 resp_header_copy (resp, "Transfer-Encoding", hdrval, sizeof (hdrval));
2030 if (0 == strcasecmp (hdrval, "chunked"))
2031 chunked_transfer_encoding = true;
2033 /* Handle (possibly multiple instances of) the Set-Cookie header. */
2037 const char *scbeg, *scend;
2038 /* The jar should have been created by now. */
2039 assert (wget_cookie_jar != NULL);
2041 (scpos = resp_header_locate (resp, "Set-Cookie", scpos,
2042 &scbeg, &scend)) != -1;
2045 char *set_cookie; BOUNDED_TO_ALLOCA (scbeg, scend, set_cookie);
2046 cookie_handle_set_cookie (wget_cookie_jar, u->host, u->port,
2047 u->path, set_cookie);
2052 /* The server has promised that it will not close the connection
2053 when we're done. This means that we can register it. */
2054 register_persistent (conn->host, conn->port, sock, using_ssl);
2056 if (statcode == HTTP_STATUS_UNAUTHORIZED)
2058 /* Authorization is required. */
2059 if (keep_alive && !head_only
2060 && skip_short_body (sock, contlen, chunked_transfer_encoding))
2061 CLOSE_FINISH (sock);
2063 CLOSE_INVALIDATE (sock);
2064 pconn.authorized = false;
2065 if (!auth_finished && (user && passwd))
2067 /* IIS sends multiple copies of WWW-Authenticate, one with
2068 the value "negotiate", and other(s) with data. Loop over
2069 all the occurrences and pick the one we recognize. */
2071 const char *wabeg, *waend;
2072 char *www_authenticate = NULL;
2074 (wapos = resp_header_locate (resp, "WWW-Authenticate", wapos,
2075 &wabeg, &waend)) != -1;
2077 if (known_authentication_scheme_p (wabeg, waend))
2079 BOUNDED_TO_ALLOCA (wabeg, waend, www_authenticate);
2083 if (!www_authenticate)
2085 /* If the authentication header is missing or
2086 unrecognized, there's no sense in retrying. */
2087 logputs (LOG_NOTQUIET, _("Unknown authentication scheme.\n"));
2089 else if (!basic_auth_finished
2090 || !BEGINS_WITH (www_authenticate, "Basic"))
2093 pth = url_full_path (u);
2094 request_set_header (req, "Authorization",
2095 create_authorization_line (www_authenticate,
2097 request_method (req),
2101 if (BEGINS_WITH (www_authenticate, "NTLM"))
2103 else if (!u->user && BEGINS_WITH (www_authenticate, "Basic"))
2105 /* Need to register this host as using basic auth,
2106 * so we automatically send creds next time. */
2107 register_basic_auth_host (u->host);
2110 xfree_null (message);
2113 goto retry_with_auth;
2117 /* We already did Basic auth, and it failed. Gotta
2121 logputs (LOG_NOTQUIET, _("Authorization failed.\n"));
2123 xfree_null (message);
2128 else /* statcode != HTTP_STATUS_UNAUTHORIZED */
2130 /* Kludge: if NTLM is used, mark the TCP connection as authorized. */
2132 pconn.authorized = true;
2135 /* Determine the local filename if needed. Notice that if -O is used
2136 * hstat.local_file is set by http_loop to the argument of -O. */
2137 if (!hs->local_file)
2139 char *local_file = NULL;
2141 /* Honor Content-Disposition whether possible. */
2142 if (!opt.content_disposition
2143 || !resp_header_copy (resp, "Content-Disposition",
2144 hdrval, sizeof (hdrval))
2145 || !parse_content_disposition (hdrval, &local_file))
2147 /* The Content-Disposition header is missing or broken.
2148 * Choose unique file name according to given URL. */
2149 hs->local_file = url_file_name (u, NULL);
2153 DEBUGP (("Parsed filename from Content-Disposition: %s\n",
2155 hs->local_file = url_file_name (u, local_file);
2159 /* TODO: perform this check only once. */
2160 if (!hs->existence_checked && file_exists_p (hs->local_file))
2162 if (opt.noclobber && !opt.output_document)
2164 /* If opt.noclobber is turned on and file already exists, do not
2165 retrieve the file. But if the output_document was given, then this
2166 test was already done and the file didn't exist. Hence the !opt.output_document */
2167 logprintf (LOG_VERBOSE, _("\
2168 File %s already there; not retrieving.\n\n"), quote (hs->local_file));
2169 /* If the file is there, we suppose it's retrieved OK. */
2172 /* #### Bogusness alert. */
2173 /* If its suffix is "html" or "htm" or similar, assume text/html. */
2174 if (has_html_suffix_p (hs->local_file))
2178 xfree_null (message);
2179 return RETRUNNEEDED;
2181 else if (!ALLOW_CLOBBER)
2183 char *unique = unique_name (hs->local_file, true);
2184 if (unique != hs->local_file)
2185 xfree (hs->local_file);
2186 hs->local_file = unique;
2189 hs->existence_checked = true;
2191 /* Support timestamping */
2192 /* TODO: move this code out of gethttp. */
2193 if (opt.timestamping && !hs->timestamp_checked)
2195 size_t filename_len = strlen (hs->local_file);
2196 char *filename_plus_orig_suffix = alloca (filename_len + sizeof (ORIG_SFX));
2197 bool local_dot_orig_file_exists = false;
2198 char *local_filename = NULL;
2201 if (opt.backup_converted)
2202 /* If -K is specified, we'll act on the assumption that it was specified
2203 last time these files were downloaded as well, and instead of just
2204 comparing local file X against server file X, we'll compare local
2205 file X.orig (if extant, else X) against server file X. If -K
2206 _wasn't_ specified last time, or the server contains files called
2207 *.orig, -N will be back to not operating correctly with -k. */
2209 /* Would a single s[n]printf() call be faster? --dan
2211 Definitely not. sprintf() is horribly slow. It's a
2212 different question whether the difference between the two
2213 affects a program. Usually I'd say "no", but at one
2214 point I profiled Wget, and found that a measurable and
2215 non-negligible amount of time was lost calling sprintf()
2216 in url.c. Replacing sprintf with inline calls to
2217 strcpy() and number_to_string() made a difference.
2219 memcpy (filename_plus_orig_suffix, hs->local_file, filename_len);
2220 memcpy (filename_plus_orig_suffix + filename_len,
2221 ORIG_SFX, sizeof (ORIG_SFX));
2223 /* Try to stat() the .orig file. */
2224 if (stat (filename_plus_orig_suffix, &st) == 0)
2226 local_dot_orig_file_exists = true;
2227 local_filename = filename_plus_orig_suffix;
2231 if (!local_dot_orig_file_exists)
2232 /* Couldn't stat() <file>.orig, so try to stat() <file>. */
2233 if (stat (hs->local_file, &st) == 0)
2234 local_filename = hs->local_file;
2236 if (local_filename != NULL)
2237 /* There was a local file, so we'll check later to see if the version
2238 the server has is the same version we already have, allowing us to
2241 hs->orig_file_name = xstrdup (local_filename);
2242 hs->orig_file_size = st.st_size;
2243 hs->orig_file_tstamp = st.st_mtime;
2245 /* Modification time granularity is 2 seconds for Windows, so
2246 increase local time by 1 second for later comparison. */
2247 ++hs->orig_file_tstamp;
2254 hs->statcode = statcode;
2256 hs->error = xstrdup (_("Malformed status line"));
2258 hs->error = xstrdup (_("(no description)"));
2260 hs->error = xstrdup (message);
2261 xfree_null (message);
2263 type = resp_header_strdup (resp, "Content-Type");
2266 char *tmp = strchr (type, ';');
2269 /* sXXXav: only needed if IRI support is enabled */
2270 char *tmp2 = tmp + 1;
2272 while (tmp > type && c_isspace (tmp[-1]))
2276 /* Try to get remote encoding if needed */
2277 if (opt.enable_iri && !opt.encoding_remote)
2279 tmp = parse_charset (tmp2);
2281 set_content_encoding (iri, tmp);
2285 hs->newloc = resp_header_strdup (resp, "Location");
2286 hs->remote_time = resp_header_strdup (resp, "Last-Modified");
2288 if (resp_header_copy (resp, "Content-Range", hdrval, sizeof (hdrval)))
2290 wgint first_byte_pos, last_byte_pos, entity_length;
2291 if (parse_content_range (hdrval, &first_byte_pos, &last_byte_pos,
2294 contrange = first_byte_pos;
2295 contlen = last_byte_pos - first_byte_pos + 1;
2300 /* 20x responses are counted among successful by default. */
2301 if (H_20X (statcode))
2304 /* Return if redirected. */
2305 if (H_REDIRECTED (statcode) || statcode == HTTP_STATUS_MULTIPLE_CHOICES)
2307 /* RFC2068 says that in case of the 300 (multiple choices)
2308 response, the server can output a preferred URL through
2309 `Location' header; otherwise, the request should be treated
2310 like GET. So, if the location is set, it will be a
2311 redirection; otherwise, just proceed normally. */
2312 if (statcode == HTTP_STATUS_MULTIPLE_CHOICES && !hs->newloc)
2316 logprintf (LOG_VERBOSE,
2317 _("Location: %s%s\n"),
2318 hs->newloc ? escnonprint_uri (hs->newloc) : _("unspecified"),
2319 hs->newloc ? _(" [following]") : "");
2320 if (keep_alive && !head_only
2321 && skip_short_body (sock, contlen, chunked_transfer_encoding))
2322 CLOSE_FINISH (sock);
2324 CLOSE_INVALIDATE (sock);
2331 /* If content-type is not given, assume text/html. This is because
2332 of the multitude of broken CGI's that "forget" to generate the
2335 0 == strncasecmp (type, TEXTHTML_S, strlen (TEXTHTML_S)) ||
2336 0 == strncasecmp (type, TEXTXHTML_S, strlen (TEXTXHTML_S)))
2342 0 == strncasecmp (type, TEXTCSS_S, strlen (TEXTCSS_S)))
2347 if (opt.adjust_extension)
2350 /* -E / --adjust-extension / adjust_extension = on was specified,
2351 and this is a text/html file. If some case-insensitive
2352 variation on ".htm[l]" isn't already the file's suffix,
2355 ensure_extension (hs, ".html", dt);
2357 else if (*dt & TEXTCSS)
2359 ensure_extension (hs, ".css", dt);
2363 if (statcode == HTTP_STATUS_RANGE_NOT_SATISFIABLE
2364 || (!opt.timestamping && hs->restval > 0 && statcode == HTTP_STATUS_OK
2365 && contrange == 0 && contlen >= 0 && hs->restval >= contlen))
2367 /* If `-c' is in use and the file has been fully downloaded (or
2368 the remote file has shrunk), Wget effectively requests bytes
2369 after the end of file and the server response with 416
2370 (or 200 with a <= Content-Length. */
2371 logputs (LOG_VERBOSE, _("\
2372 \n The file is already fully retrieved; nothing to do.\n\n"));
2373 /* In case the caller inspects. */
2376 /* Mark as successfully retrieved. */
2379 CLOSE_INVALIDATE (sock); /* would be CLOSE_FINISH, but there
2380 might be more bytes in the body. */
2382 return RETRUNNEEDED;
2384 if ((contrange != 0 && contrange != hs->restval)
2385 || (H_PARTIAL (statcode) && !contrange))
2387 /* The Range request was somehow misunderstood by the server.
2390 CLOSE_INVALIDATE (sock);
2397 hs->contlen = contlen + contrange;
2403 /* No need to print this output if the body won't be
2404 downloaded at all, or if the original server response is
2406 logputs (LOG_VERBOSE, _("Length: "));
2409 logputs (LOG_VERBOSE, number_to_static_string (contlen + contrange));
2410 if (contlen + contrange >= 1024)
2411 logprintf (LOG_VERBOSE, " (%s)",
2412 human_readable (contlen + contrange));
2415 if (contlen >= 1024)
2416 logprintf (LOG_VERBOSE, _(", %s (%s) remaining"),
2417 number_to_static_string (contlen),
2418 human_readable (contlen));
2420 logprintf (LOG_VERBOSE, _(", %s remaining"),
2421 number_to_static_string (contlen));
2425 logputs (LOG_VERBOSE,
2426 opt.ignore_length ? _("ignored") : _("unspecified"));
2428 logprintf (LOG_VERBOSE, " [%s]\n", quotearg_style (escape_quoting_style, type));
2430 logputs (LOG_VERBOSE, "\n");
2434 type = NULL; /* We don't need it any more. */
2436 /* Return if we have no intention of further downloading. */
2437 if (!(*dt & RETROKF) || head_only)
2439 /* In case the caller cares to look... */
2444 /* Pre-1.10 Wget used CLOSE_INVALIDATE here. Now we trust the
2445 servers not to send body in response to a HEAD request, and
2446 those that do will likely be caught by test_socket_open.
2447 If not, they can be worked around using
2448 `--no-http-keep-alive'. */
2449 CLOSE_FINISH (sock);
2451 && skip_short_body (sock, contlen, chunked_transfer_encoding))
2452 /* Successfully skipped the body; also keep using the socket. */
2453 CLOSE_FINISH (sock);
2455 CLOSE_INVALIDATE (sock);
2457 return RETRFINISHED;
2461 For VMS, define common fopen() optional arguments.
2464 # define FOPEN_OPT_ARGS "fop=sqo", "acc", acc_cb, &open_id
2465 # define FOPEN_BIN_FLAG 3
2466 #else /* def __VMS */
2467 # define FOPEN_BIN_FLAG true
2468 #endif /* def __VMS [else] */
2470 /* Open the local file. */
2473 mkalldirs (hs->local_file);
2475 rotate_backups (hs->local_file);
2482 fp = fopen (hs->local_file, "ab", FOPEN_OPT_ARGS);
2483 #else /* def __VMS */
2484 fp = fopen (hs->local_file, "ab");
2485 #endif /* def __VMS [else] */
2487 else if (ALLOW_CLOBBER)
2493 fp = fopen (hs->local_file, "wb", FOPEN_OPT_ARGS);
2494 #else /* def __VMS */
2495 fp = fopen (hs->local_file, "wb");
2496 #endif /* def __VMS [else] */
2500 fp = fopen_excl (hs->local_file, FOPEN_BIN_FLAG);
2501 if (!fp && errno == EEXIST)
2503 /* We cannot just invent a new name and use it (which is
2504 what functions like unique_create typically do)
2505 because we told the user we'd use this name.
2506 Instead, return and retry the download. */
2507 logprintf (LOG_NOTQUIET,
2508 _("%s has sprung into existence.\n"),
2510 CLOSE_INVALIDATE (sock);
2512 return FOPEN_EXCL_ERR;
2517 logprintf (LOG_NOTQUIET, "%s: %s\n", hs->local_file, strerror (errno));
2518 CLOSE_INVALIDATE (sock);
2526 /* Print fetch message, if opt.verbose. */
2529 logprintf (LOG_NOTQUIET, _("Saving to: %s\n"),
2530 HYPHENP (hs->local_file) ? quote ("STDOUT") : quote (hs->local_file));
2533 /* This confuses the timestamping code that checks for file size.
2534 #### The timestamping code should be smarter about file size. */
2535 if (opt.save_headers && hs->restval == 0)
2536 fwrite (head, 1, strlen (head), fp);
2538 /* Now we no longer need to store the response header. */
2541 /* Download the request body. */
2544 /* If content-length is present, read that much; otherwise, read
2545 until EOF. The HTTP spec doesn't require the server to
2546 actually close the connection when it's done sending data. */
2547 flags |= rb_read_exactly;
2548 if (hs->restval > 0 && contrange == 0)
2549 /* If the server ignored our range request, instruct fd_read_body
2550 to skip the first RESTVAL bytes of body. */
2551 flags |= rb_skip_startpos;
2553 if (chunked_transfer_encoding)
2554 flags |= rb_chunked_transfer_encoding;
2556 hs->len = hs->restval;
2558 hs->res = fd_read_body (sock, fp, contlen != -1 ? contlen : 0,
2559 hs->restval, &hs->rd_size, &hs->len, &hs->dltime,
2563 CLOSE_FINISH (sock);
2567 hs->rderrmsg = xstrdup (fd_errstr (sock));
2568 CLOSE_INVALIDATE (sock);
2575 return RETRFINISHED;
2578 /* The genuine HTTP loop! This is the part where the retrieval is
2579 retried, and retried, and retried, and... */
2581 http_loop (struct url *u, struct url *original_url, char **newloc,
2582 char **local_file, const char *referer, int *dt, struct url *proxy,
2586 bool got_head = false; /* used for time-stamping and filename detection */
2587 bool time_came_from_head = false;
2588 bool got_name = false;
2591 uerr_t err, ret = TRYLIMEXC;
2592 time_t tmr = -1; /* remote time-stamp */
2593 struct http_stat hstat; /* HTTP status */
2595 bool send_head_first = true;
2597 bool force_full_retrieve = false;
2599 /* Assert that no value for *LOCAL_FILE was passed. */
2600 assert (local_file == NULL || *local_file == NULL);
2602 /* Set LOCAL_FILE parameter. */
2603 if (local_file && opt.output_document)
2604 *local_file = HYPHENP (opt.output_document) ? NULL : xstrdup (opt.output_document);
2606 /* Reset NEWLOC parameter. */
2609 /* This used to be done in main(), but it's a better idea to do it
2610 here so that we don't go through the hoops if we're just using
2615 /* Warn on (likely bogus) wildcard usage in HTTP. */
2616 if (opt.ftp_glob && has_wildcards_p (u->path))
2617 logputs (LOG_VERBOSE, _("Warning: wildcards not supported in HTTP.\n"));
2619 /* Setup hstat struct. */
2621 hstat.referer = referer;
2623 if (opt.output_document)
2625 hstat.local_file = xstrdup (opt.output_document);
2628 else if (!opt.content_disposition)
2631 url_file_name (opt.trustservernames ? u : original_url, NULL);
2635 /* TODO: Ick! This code is now in both gethttp and http_loop, and is
2636 * screaming for some refactoring. */
2637 if (got_name && file_exists_p (hstat.local_file) && opt.noclobber && !opt.output_document)
2639 /* If opt.noclobber is turned on and file already exists, do not
2640 retrieve the file. But if the output_document was given, then this
2641 test was already done and the file didn't exist. Hence the !opt.output_document */
2642 logprintf (LOG_VERBOSE, _("\
2643 File %s already there; not retrieving.\n\n"),
2644 quote (hstat.local_file));
2645 /* If the file is there, we suppose it's retrieved OK. */
2648 /* #### Bogusness alert. */
2649 /* If its suffix is "html" or "htm" or similar, assume text/html. */
2650 if (has_html_suffix_p (hstat.local_file))
2657 /* Reset the counter. */
2660 /* Reset the document type. */
2663 /* Skip preliminary HEAD request if we're not in spider mode. */
2665 send_head_first = false;
2667 /* Send preliminary HEAD request if -N is given and we have an existing
2668 * destination file. */
2669 file_name = url_file_name (opt.trustservernames ? u : original_url, NULL);
2670 if (opt.timestamping && (file_exists_p (file_name)
2671 || opt.content_disposition))
2672 send_head_first = true;
2678 /* Increment the pass counter. */
2680 sleep_between_retrievals (count);
2682 /* Get the current time string. */
2683 tms = datetime_str (time (NULL));
2685 if (opt.spider && !got_head)
2686 logprintf (LOG_VERBOSE, _("\
2687 Spider mode enabled. Check if remote file exists.\n"));
2689 /* Print fetch message, if opt.verbose. */
2692 char *hurl = url_string (u, URL_AUTH_HIDE_PASSWD);
2697 sprintf (tmp, _("(try:%2d)"), count);
2698 logprintf (LOG_NOTQUIET, "--%s-- %s %s\n",
2703 logprintf (LOG_NOTQUIET, "--%s-- %s\n",
2708 ws_changetitle (hurl);
2713 /* Default document type is empty. However, if spider mode is
2714 on or time-stamping is employed, HEAD_ONLY commands is
2715 encoded within *dt. */
2716 if (send_head_first && !got_head)
2721 /* Decide whether or not to restart. */
2722 if (force_full_retrieve)
2723 hstat.restval = hstat.len;
2724 else if (opt.always_rest
2726 && stat (hstat.local_file, &st) == 0
2727 && S_ISREG (st.st_mode))
2728 /* When -c is used, continue from on-disk size. (Can't use
2729 hstat.len even if count>1 because we don't want a failed
2730 first attempt to clobber existing data.) */
2731 hstat.restval = st.st_size;
2733 /* otherwise, continue where the previous try left off */
2734 hstat.restval = hstat.len;
2738 /* Decide whether to send the no-cache directive. We send it in
2740 a) we're using a proxy, and we're past our first retrieval.
2741 Some proxies are notorious for caching incomplete data, so
2742 we require a fresh get.
2743 b) caching is explicitly inhibited. */
2744 if ((proxy && count > 1) /* a */
2745 || !opt.allow_cache) /* b */
2746 *dt |= SEND_NOCACHE;
2748 *dt &= ~SEND_NOCACHE;
2750 /* Try fetching the document, or at least its head. */
2751 err = gethttp (u, &hstat, dt, proxy, iri);
2754 tms = datetime_str (time (NULL));
2756 /* Get the new location (with or without the redirection). */
2758 *newloc = xstrdup (hstat.newloc);
2762 case HERR: case HEOF: case CONSOCKERR: case CONCLOSED:
2763 case CONERROR: case READERR: case WRITEFAILED:
2764 case RANGEERR: case FOPEN_EXCL_ERR:
2765 /* Non-fatal errors continue executing the loop, which will
2766 bring them to "while" statement at the end, to judge
2767 whether the number of tries was exceeded. */
2768 printwhat (count, opt.ntry);
2770 case FWRITEERR: case FOPENERR:
2771 /* Another fatal error. */
2772 logputs (LOG_VERBOSE, "\n");
2773 logprintf (LOG_NOTQUIET, _("Cannot write to %s (%s).\n"),
2774 quote (hstat.local_file), strerror (errno));
2775 case HOSTERR: case CONIMPOSSIBLE: case PROXERR: case AUTHFAILED:
2776 case SSLINITFAILED: case CONTNOTSUPPORTED: case VERIFCERTERR:
2777 /* Fatal errors just return from the function. */
2781 /* Another fatal error. */
2782 logprintf (LOG_NOTQUIET, _("Unable to establish SSL connection.\n"));
2786 /* Return the new location to the caller. */
2789 logprintf (LOG_NOTQUIET,
2790 _("ERROR: Redirection (%d) without location.\n"),
2800 /* The file was already fully retrieved. */
2804 /* Deal with you later. */
2807 /* All possibilities should have been exhausted. */
2811 if (!(*dt & RETROKF))
2816 /* #### Ugly ugly ugly! */
2817 hurl = url_string (u, URL_AUTH_HIDE_PASSWD);
2818 logprintf (LOG_NONVERBOSE, "%s:\n", hurl);
2821 /* Fall back to GET if HEAD fails with a 500 or 501 error code. */
2823 && (hstat.statcode == 500 || hstat.statcode == 501))
2828 /* Maybe we should always keep track of broken links, not just in
2830 * Don't log error if it was UTF-8 encoded because we will try
2831 * once unencoded. */
2832 else if (opt.spider && !iri->utf8_encode)
2834 /* #### Again: ugly ugly ugly! */
2836 hurl = url_string (u, URL_AUTH_HIDE_PASSWD);
2837 nonexisting_url (hurl);
2838 logprintf (LOG_NOTQUIET, _("\
2839 Remote file does not exist -- broken link!!!\n"));
2843 logprintf (LOG_NOTQUIET, _("%s ERROR %d: %s.\n"),
2844 tms, hstat.statcode,
2845 quotearg_style (escape_quoting_style, hstat.error));
2847 logputs (LOG_VERBOSE, "\n");
2853 /* Did we get the time-stamp? */
2856 got_head = true; /* no more time-stamping */
2858 if (opt.timestamping && !hstat.remote_time)
2860 logputs (LOG_NOTQUIET, _("\
2861 Last-modified header missing -- time-stamps turned off.\n"));
2863 else if (hstat.remote_time)
2865 /* Convert the date-string into struct tm. */
2866 tmr = http_atotm (hstat.remote_time);
2867 if (tmr == (time_t) (-1))
2868 logputs (LOG_VERBOSE, _("\
2869 Last-modified header invalid -- time-stamp ignored.\n"));
2870 if (*dt & HEAD_ONLY)
2871 time_came_from_head = true;
2874 if (send_head_first)
2876 /* The time-stamping section. */
2877 if (opt.timestamping)
2879 if (hstat.orig_file_name) /* Perform the following
2880 checks only if the file
2882 download already exists. */
2884 if (hstat.remote_time &&
2885 tmr != (time_t) (-1))
2887 /* Now time-stamping can be used validly.
2888 Time-stamping means that if the sizes of
2889 the local and remote file match, and local
2890 file is newer than the remote file, it will
2891 not be retrieved. Otherwise, the normal
2892 download procedure is resumed. */
2893 if (hstat.orig_file_tstamp >= tmr)
2895 if (hstat.contlen == -1
2896 || hstat.orig_file_size == hstat.contlen)
2898 logprintf (LOG_VERBOSE, _("\
2899 Server file no newer than local file %s -- not retrieving.\n\n"),
2900 quote (hstat.orig_file_name));
2906 logprintf (LOG_VERBOSE, _("\
2907 The sizes do not match (local %s) -- retrieving.\n"),
2908 number_to_static_string (hstat.orig_file_size));
2913 force_full_retrieve = true;
2914 logputs (LOG_VERBOSE,
2915 _("Remote file is newer, retrieving.\n"));
2918 logputs (LOG_VERBOSE, "\n");
2922 /* free_hstat (&hstat); */
2923 hstat.timestamp_checked = true;
2928 bool finished = true;
2933 logputs (LOG_VERBOSE, _("\
2934 Remote file exists and could contain links to other resources -- retrieving.\n\n"));
2939 logprintf (LOG_VERBOSE, _("\
2940 Remote file exists but does not contain any link -- not retrieving.\n\n"));
2941 ret = RETROK; /* RETRUNNEEDED is not for caller. */
2948 logprintf (LOG_VERBOSE, _("\
2949 Remote file exists and could contain further links,\n\
2950 but recursion is disabled -- not retrieving.\n\n"));
2954 logprintf (LOG_VERBOSE, _("\
2955 Remote file exists.\n\n"));
2957 ret = RETROK; /* RETRUNNEEDED is not for caller. */
2962 logprintf (LOG_NONVERBOSE,
2963 _("%s URL: %s %2d %s\n"),
2964 tms, u->url, hstat.statcode,
2965 hstat.message ? quotearg_style (escape_quoting_style, hstat.message) : "");
2972 count = 0; /* the retrieve count for HEAD is reset */
2974 } /* send_head_first */
2977 if (opt.useservertimestamps
2978 && (tmr != (time_t) (-1))
2979 && ((hstat.len == hstat.contlen) ||
2980 ((hstat.res == 0) && (hstat.contlen == -1))))
2982 const char *fl = NULL;
2983 set_local_file (&fl, hstat.local_file);
2987 /* Reparse time header, in case it's changed. */
2988 if (time_came_from_head
2989 && hstat.remote_time && hstat.remote_time[0])
2991 newtmr = http_atotm (hstat.remote_time);
2992 if (newtmr != (time_t)-1)
2998 /* End of time-stamping section. */
3000 tmrate = retr_rate (hstat.rd_size, hstat.dltime);
3001 total_download_time += hstat.dltime;
3003 if (hstat.len == hstat.contlen)
3007 bool write_to_stdout = (opt.output_document && HYPHENP (opt.output_document));
3009 logprintf (LOG_VERBOSE,
3011 ? _("%s (%s) - written to stdout %s[%s/%s]\n\n")
3012 : _("%s (%s) - %s saved [%s/%s]\n\n"),
3014 write_to_stdout ? "" : quote (hstat.local_file),
3015 number_to_static_string (hstat.len),
3016 number_to_static_string (hstat.contlen));
3017 logprintf (LOG_NONVERBOSE,
3018 "%s URL:%s [%s/%s] -> \"%s\" [%d]\n",
3020 number_to_static_string (hstat.len),
3021 number_to_static_string (hstat.contlen),
3022 hstat.local_file, count);
3025 total_downloaded_bytes += hstat.rd_size;
3027 /* Remember that we downloaded the file for later ".orig" code. */
3028 if (*dt & ADDED_HTML_EXTENSION)
3029 downloaded_file (FILE_DOWNLOADED_AND_HTML_EXTENSION_ADDED, hstat.local_file);
3031 downloaded_file (FILE_DOWNLOADED_NORMALLY, hstat.local_file);
3036 else if (hstat.res == 0) /* No read error */
3038 if (hstat.contlen == -1) /* We don't know how much we were supposed
3039 to get, so assume we succeeded. */
3043 bool write_to_stdout = (opt.output_document && HYPHENP (opt.output_document));
3045 logprintf (LOG_VERBOSE,
3047 ? _("%s (%s) - written to stdout %s[%s]\n\n")
3048 : _("%s (%s) - %s saved [%s]\n\n"),
3050 write_to_stdout ? "" : quote (hstat.local_file),
3051 number_to_static_string (hstat.len));
3052 logprintf (LOG_NONVERBOSE,
3053 "%s URL:%s [%s] -> \"%s\" [%d]\n",
3054 tms, u->url, number_to_static_string (hstat.len),
3055 hstat.local_file, count);
3058 total_downloaded_bytes += hstat.rd_size;
3060 /* Remember that we downloaded the file for later ".orig" code. */
3061 if (*dt & ADDED_HTML_EXTENSION)
3062 downloaded_file (FILE_DOWNLOADED_AND_HTML_EXTENSION_ADDED, hstat.local_file);
3064 downloaded_file (FILE_DOWNLOADED_NORMALLY, hstat.local_file);
3069 else if (hstat.len < hstat.contlen) /* meaning we lost the
3070 connection too soon */
3072 logprintf (LOG_VERBOSE,
3073 _("%s (%s) - Connection closed at byte %s. "),
3074 tms, tmrate, number_to_static_string (hstat.len));
3075 printwhat (count, opt.ntry);
3078 else if (hstat.len != hstat.restval)
3079 /* Getting here would mean reading more data than
3080 requested with content-length, which we never do. */
3084 /* Getting here probably means that the content-length was
3085 * _less_ than the original, local size. We should probably
3086 * truncate or re-read, or something. FIXME */
3091 else /* from now on hstat.res can only be -1 */
3093 if (hstat.contlen == -1)
3095 logprintf (LOG_VERBOSE,
3096 _("%s (%s) - Read error at byte %s (%s)."),
3097 tms, tmrate, number_to_static_string (hstat.len),
3099 printwhat (count, opt.ntry);
3102 else /* hstat.res == -1 and contlen is given */
3104 logprintf (LOG_VERBOSE,
3105 _("%s (%s) - Read error at byte %s/%s (%s). "),
3107 number_to_static_string (hstat.len),
3108 number_to_static_string (hstat.contlen),
3110 printwhat (count, opt.ntry);
3116 while (!opt.ntry || (count < opt.ntry));
3120 *local_file = xstrdup (hstat.local_file);
3121 free_hstat (&hstat);
3126 /* Check whether the result of strptime() indicates success.
3127 strptime() returns the pointer to how far it got to in the string.
3128 The processing has been successful if the string is at `GMT' or
3129 `+X', or at the end of the string.
3131 In extended regexp parlance, the function returns 1 if P matches
3132 "^ *(GMT|[+-][0-9]|$)", 0 otherwise. P being NULL (which strptime
3133 can return) is considered a failure and 0 is returned. */
3135 check_end (const char *p)
3139 while (c_isspace (*p))
3142 || (p[0] == 'G' && p[1] == 'M' && p[2] == 'T')
3143 || ((p[0] == '+' || p[0] == '-') && c_isdigit (p[1])))
3149 /* Convert the textual specification of time in TIME_STRING to the
3150 number of seconds since the Epoch.
3152 TIME_STRING can be in any of the three formats RFC2616 allows the
3153 HTTP servers to emit -- RFC1123-date, RFC850-date or asctime-date,
3154 as well as the time format used in the Set-Cookie header.
3155 Timezones are ignored, and should be GMT.
3157 Return the computed time_t representation, or -1 if the conversion
3160 This function uses strptime with various string formats for parsing
3161 TIME_STRING. This results in a parser that is not as lenient in
3162 interpreting TIME_STRING as I would like it to be. Being based on
3163 strptime, it always allows shortened months, one-digit days, etc.,
3164 but due to the multitude of formats in which time can be
3165 represented, an ideal HTTP time parser would be even more
3166 forgiving. It should completely ignore things like week days and
3167 concentrate only on the various forms of representing years,
3168 months, days, hours, minutes, and seconds. For example, it would
3169 be nice if it accepted ISO 8601 out of the box.
3171 I've investigated free and PD code for this purpose, but none was
3172 usable. getdate was big and unwieldy, and had potential copyright
3173 issues, or so I was informed. Dr. Marcus Hennecke's atotm(),
3174 distributed with phttpd, is excellent, but we cannot use it because
3175 it is not assigned to the FSF. So I stuck it with strptime. */
3178 http_atotm (const char *time_string)
3180 /* NOTE: Solaris strptime man page claims that %n and %t match white
3181 space, but that's not universally available. Instead, we simply
3182 use ` ' to mean "skip all WS", which works under all strptime
3183 implementations I've tested. */
3185 static const char *time_formats[] = {
3186 "%a, %d %b %Y %T", /* rfc1123: Thu, 29 Jan 1998 22:12:57 */
3187 "%A, %d-%b-%y %T", /* rfc850: Thursday, 29-Jan-98 22:12:57 */
3188 "%a %b %d %T %Y", /* asctime: Thu Jan 29 22:12:57 1998 */
3189 "%a, %d-%b-%Y %T" /* cookies: Thu, 29-Jan-1998 22:12:57
3190 (used in Set-Cookie, defined in the
3191 Netscape cookie specification.) */
3193 const char *oldlocale;
3194 char savedlocale[256];
3196 time_t ret = (time_t) -1;
3198 /* Solaris strptime fails to recognize English month names in
3199 non-English locales, which we work around by temporarily setting
3200 locale to C before invoking strptime. */
3201 oldlocale = setlocale (LC_TIME, NULL);
3204 size_t l = strlen (oldlocale) + 1;
3205 if (l >= sizeof savedlocale)
3206 savedlocale[0] = '\0';
3208 memcpy (savedlocale, oldlocale, l);
3210 else savedlocale[0] = '\0';
3212 setlocale (LC_TIME, "C");
3214 for (i = 0; i < countof (time_formats); i++)
3218 /* Some versions of strptime use the existing contents of struct
3219 tm to recalculate the date according to format. Zero it out
3220 to prevent stack garbage from influencing strptime. */
3223 if (check_end (strptime (time_string, time_formats[i], &t)))
3230 /* Restore the previous locale. */
3232 setlocale (LC_TIME, savedlocale);
3237 /* Authorization support: We support three authorization schemes:
3239 * `Basic' scheme, consisting of base64-ing USER:PASSWORD string;
3241 * `Digest' scheme, added by Junio Hamano <junio@twinsun.com>,
3242 consisting of answering to the server's challenge with the proper
3245 * `NTLM' ("NT Lan Manager") scheme, based on code written by Daniel
3246 Stenberg for libcurl. Like digest, NTLM is based on a
3247 challenge-response mechanism, but unlike digest, it is non-standard
3248 (authenticates TCP connections rather than requests), undocumented
3249 and Microsoft-specific. */
3251 /* Create the authentication header contents for the `Basic' scheme.
3252 This is done by encoding the string "USER:PASS" to base64 and
3253 prepending the string "Basic " in front of it. */
3256 basic_authentication_encode (const char *user, const char *passwd)
3259 int len1 = strlen (user) + 1 + strlen (passwd);
3261 t1 = (char *)alloca (len1 + 1);
3262 sprintf (t1, "%s:%s", user, passwd);
3264 t2 = (char *)alloca (BASE64_LENGTH (len1) + 1);
3265 base64_encode (t1, len1, t2);
3267 return concat_strings ("Basic ", t2, (char *) 0);
3270 #define SKIP_WS(x) do { \
3271 while (c_isspace (*(x))) \
3275 #ifdef ENABLE_DIGEST
3276 /* Dump the hexadecimal representation of HASH to BUF. HASH should be
3277 an array of 16 bytes containing the hash keys, and BUF should be a
3278 buffer of 33 writable characters (32 for hex digits plus one for
3279 zero termination). */
3281 dump_hash (char *buf, const unsigned char *hash)
3285 for (i = 0; i < MD5_DIGEST_SIZE; i++, hash++)
3287 *buf++ = XNUM_TO_digit (*hash >> 4);
3288 *buf++ = XNUM_TO_digit (*hash & 0xf);
3293 /* Take the line apart to find the challenge, and compose a digest
3294 authorization header. See RFC2069 section 2.1.2. */
3296 digest_authentication_encode (const char *au, const char *user,
3297 const char *passwd, const char *method,
3300 static char *realm, *opaque, *nonce;
3305 { "realm", &realm },
3306 { "opaque", &opaque },
3310 param_token name, value;
3312 realm = opaque = nonce = NULL;
3314 au += 6; /* skip over `Digest' */
3315 while (extract_param (&au, &name, &value, ','))
3318 size_t namelen = name.e - name.b;
3319 for (i = 0; i < countof (options); i++)
3320 if (namelen == strlen (options[i].name)
3321 && 0 == strncmp (name.b, options[i].name,
3324 *options[i].variable = strdupdelim (value.b, value.e);
3328 if (!realm || !nonce || !user || !passwd || !path || !method)
3331 xfree_null (opaque);
3336 /* Calculate the digest value. */
3339 unsigned char hash[MD5_DIGEST_SIZE];
3340 char a1buf[MD5_DIGEST_SIZE * 2 + 1], a2buf[MD5_DIGEST_SIZE * 2 + 1];
3341 char response_digest[MD5_DIGEST_SIZE * 2 + 1];
3343 /* A1BUF = H(user ":" realm ":" password) */
3344 md5_init_ctx (&ctx);
3345 md5_process_bytes ((unsigned char *)user, strlen (user), &ctx);
3346 md5_process_bytes ((unsigned char *)":", 1, &ctx);
3347 md5_process_bytes ((unsigned char *)realm, strlen (realm), &ctx);
3348 md5_process_bytes ((unsigned char *)":", 1, &ctx);
3349 md5_process_bytes ((unsigned char *)passwd, strlen (passwd), &ctx);
3350 md5_finish_ctx (&ctx, hash);
3351 dump_hash (a1buf, hash);
3353 /* A2BUF = H(method ":" path) */
3354 md5_init_ctx (&ctx);
3355 md5_process_bytes ((unsigned char *)method, strlen (method), &ctx);
3356 md5_process_bytes ((unsigned char *)":", 1, &ctx);
3357 md5_process_bytes ((unsigned char *)path, strlen (path), &ctx);
3358 md5_finish_ctx (&ctx, hash);
3359 dump_hash (a2buf, hash);
3361 /* RESPONSE_DIGEST = H(A1BUF ":" nonce ":" A2BUF) */
3362 md5_init_ctx (&ctx);
3363 md5_process_bytes ((unsigned char *)a1buf, MD5_DIGEST_SIZE * 2, &ctx);
3364 md5_process_bytes ((unsigned char *)":", 1, &ctx);
3365 md5_process_bytes ((unsigned char *)nonce, strlen (nonce), &ctx);
3366 md5_process_bytes ((unsigned char *)":", 1, &ctx);
3367 md5_process_bytes ((unsigned char *)a2buf, MD5_DIGEST_SIZE * 2, &ctx);
3368 md5_finish_ctx (&ctx, hash);
3369 dump_hash (response_digest, hash);
3371 res = xmalloc (strlen (user)
3376 + 2 * MD5_DIGEST_SIZE /*strlen (response_digest)*/
3377 + (opaque ? strlen (opaque) : 0)
3379 sprintf (res, "Digest \
3380 username=\"%s\", realm=\"%s\", nonce=\"%s\", uri=\"%s\", response=\"%s\"",
3381 user, realm, nonce, path, response_digest);
3384 char *p = res + strlen (res);
3385 strcat (p, ", opaque=\"");
3392 #endif /* ENABLE_DIGEST */
3394 /* Computing the size of a string literal must take into account that
3395 value returned by sizeof includes the terminating \0. */
3396 #define STRSIZE(literal) (sizeof (literal) - 1)
3398 /* Whether chars in [b, e) begin with the literal string provided as
3399 first argument and are followed by whitespace or terminating \0.
3400 The comparison is case-insensitive. */
3401 #define STARTS(literal, b, e) \
3403 && ((size_t) ((e) - (b))) >= STRSIZE (literal) \
3404 && 0 == strncasecmp (b, literal, STRSIZE (literal)) \
3405 && ((size_t) ((e) - (b)) == STRSIZE (literal) \
3406 || c_isspace (b[STRSIZE (literal)])))
3409 known_authentication_scheme_p (const char *hdrbeg, const char *hdrend)
3411 return STARTS ("Basic", hdrbeg, hdrend)
3412 #ifdef ENABLE_DIGEST
3413 || STARTS ("Digest", hdrbeg, hdrend)
3416 || STARTS ("NTLM", hdrbeg, hdrend)
3423 /* Create the HTTP authorization request header. When the
3424 `WWW-Authenticate' response header is seen, according to the
3425 authorization scheme specified in that header (`Basic' and `Digest'
3426 are supported by the current implementation), produce an
3427 appropriate HTTP authorization request header. */
3429 create_authorization_line (const char *au, const char *user,
3430 const char *passwd, const char *method,
3431 const char *path, bool *finished)
3433 /* We are called only with known schemes, so we can dispatch on the
3435 switch (c_toupper (*au))
3437 case 'B': /* Basic */
3439 return basic_authentication_encode (user, passwd);
3440 #ifdef ENABLE_DIGEST
3441 case 'D': /* Digest */
3443 return digest_authentication_encode (au, user, passwd, method, path);
3446 case 'N': /* NTLM */
3447 if (!ntlm_input (&pconn.ntlm, au))
3452 return ntlm_output (&pconn.ntlm, user, passwd, finished);
3455 /* We shouldn't get here -- this function should be only called
3456 with values approved by known_authentication_scheme_p. */
3464 if (!wget_cookie_jar)
3465 wget_cookie_jar = cookie_jar_new ();
3466 if (opt.cookies_input && !cookies_loaded_p)
3468 cookie_jar_load (wget_cookie_jar, opt.cookies_input);
3469 cookies_loaded_p = true;
3476 if (wget_cookie_jar)
3477 cookie_jar_save (wget_cookie_jar, opt.cookies_output);
3483 xfree_null (pconn.host);
3484 if (wget_cookie_jar)
3485 cookie_jar_delete (wget_cookie_jar);
3489 ensure_extension (struct http_stat *hs, const char *ext, int *dt)
3491 char *last_period_in_local_filename = strrchr (hs->local_file, '.');
3493 int len = strlen (ext);
3496 strncpy (shortext, ext, len - 1);
3497 shortext[len - 2] = '\0';
3500 if (last_period_in_local_filename == NULL
3501 || !(0 == strcasecmp (last_period_in_local_filename, shortext)
3502 || 0 == strcasecmp (last_period_in_local_filename, ext)))
3504 int local_filename_len = strlen (hs->local_file);
3505 /* Resize the local file, allowing for ".html" preceded by
3506 optional ".NUMBER". */
3507 hs->local_file = xrealloc (hs->local_file,
3508 local_filename_len + 24 + len);
3509 strcpy (hs->local_file + local_filename_len, ext);
3510 /* If clobbering is not allowed and the file, as named,
3511 exists, tack on ".NUMBER.html" instead. */
3512 if (!ALLOW_CLOBBER && file_exists_p (hs->local_file))
3516 sprintf (hs->local_file + local_filename_len,
3517 ".%d%s", ext_num++, ext);
3518 while (file_exists_p (hs->local_file));
3520 *dt |= ADDED_HTML_EXTENSION;
3528 test_parse_content_disposition()
3536 { "filename=\"file.ext\"", "file.ext", true },
3537 { "attachment; filename=\"file.ext\"", "file.ext", true },
3538 { "attachment; filename=\"file.ext\"; dummy", "file.ext", true },
3539 { "attachment", NULL, false },
3540 { "attachement; filename*=UTF-8'en-US'hello.txt", "hello.txt", true },
3541 { "attachement; filename*0=\"hello\"; filename*1=\"world.txt\"", "helloworld.txt", true },
3544 for (i = 0; i < sizeof(test_array)/sizeof(test_array[0]); ++i)
3549 res = parse_content_disposition (test_array[i].hdrval, &filename);
3551 mu_assert ("test_parse_content_disposition: wrong result",
3552 res == test_array[i].result
3554 || 0 == strcmp (test_array[i].filename, filename)));
3560 #endif /* TESTING */
3563 * vim: et sts=2 sw=2 cino+={s