/
url.c
1196 lines (1051 loc) · 31.9 KB
/
url.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
/*****************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* The contents of this file are subject to the Mozilla Public License
* Version 1.0 (the "License"); you may not use this file except in
* compliance with the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS"
* basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
* License for the specific language governing rights and limitations
* under the License.
*
* The Original Code is Curl.
*
* The Initial Developer of the Original Code is Daniel Stenberg.
*
* Portions created by the Initial Developer are Copyright (C) 1998.
* All Rights Reserved.
*
* ------------------------------------------------------------
* Main author:
* - Daniel Stenberg <Daniel.Stenberg@haxx.nu>
*
* http://curl.haxx.nu
*
* $Source$
* $Revision$
* $Date$
* $Author$
* $State$
* $Locker$
*
* ------------------------------------------------------------
****************************************************************************/
/*
* SSL code intially written by
* Linas Vepstas <linas@linas.org> and Sampo Kellomaki <sampo@iki.fi>
*/
/* -- WIN32 approved -- */
#include <stdio.h>
#include <string.h>
#include <stdarg.h>
#include <stdlib.h>
#include <ctype.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <errno.h>
#include "setup.h"
#if defined(WIN32) && !defined(__GNUC__) || defined(__MINGW32__)
#include <winsock.h>
#include <time.h>
#include <io.h>
#else
#ifdef HAVE_SYS_SOCKET_H
#include <sys/socket.h>
#endif
#include <netinet/in.h>
#include <sys/time.h>
#include <sys/resource.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#include <netdb.h>
#ifdef HAVE_ARPA_INET_H
#include <arpa/inet.h>
#endif
#ifdef HAVE_NET_IF_H
#include <net/if.h>
#endif
#include <sys/ioctl.h>
#include <signal.h>
#ifdef HAVE_SYS_PARAM_H
#include <sys/param.h>
#endif
#ifdef HAVE_SYS_SELECT_H
#include <sys/select.h>
#endif
#ifndef HAVE_VPRINTF
#error "We can't compile without vprintf() support!"
#endif
#ifndef HAVE_SELECT
#error "We can't compile without select() support!"
#endif
#ifndef HAVE_SOCKET
#error "We can't compile without socket() support!"
#endif
#endif
#include "urldata.h"
#include <curl/curl.h>
#include "netrc.h"
#include "formdata.h"
#include "getenv.h"
#include "base64.h"
#include "ssluse.h"
#include "hostip.h"
#include "if2ip.h"
#include "download.h"
#include "sendf.h"
#include "speedcheck.h"
#include "getpass.h"
#include "progress.h"
#include "cookie.h"
/* And now for the protocols */
#include "ftp.h"
#include "dict.h"
#include "telnet.h"
#include "http.h"
#include "file.h"
#include "ldap.h"
#define _MPRINTF_REPLACE /* use our functions only */
#include <curl/mprintf.h>
/* -- -- */
/***********************************************************************
* Start with some silly functions to make win32-systems survive
***********************************************************************/
#if defined(WIN32) && !defined(__GNUC__) || defined(__MINGW32__)
static void cleanup(void)
{
WSACleanup();
}
static int init(void)
{
WORD wVersionRequested;
WSADATA wsaData;
int err;
wVersionRequested = MAKEWORD(1, 1);
err = WSAStartup(wVersionRequested, &wsaData);
if (err != 0)
/* Tell the user that we couldn't find a useable */
/* winsock.dll. */
return 1;
/* Confirm that the Windows Sockets DLL supports 1.1.*/
/* Note that if the DLL supports versions greater */
/* than 1.1 in addition to 1.1, it will still return */
/* 1.1 in wVersion since that is the version we */
/* requested. */
if ( LOBYTE( wsaData.wVersion ) != 1 ||
HIBYTE( wsaData.wVersion ) != 1 ) {
/* Tell the user that we couldn't find a useable */
/* winsock.dll. */
WSACleanup();
return 1;
}
return 0;
}
/* The Windows Sockets DLL is acceptable. Proceed. */
#else
static int init(void) { return 0; }
static void cleanup(void) {}
#endif
static UrgError _urlget(struct UrlData *data);
void urlfree(struct UrlData *data, bool totally)
{
#ifdef USE_SSLEAY
if (data->use_ssl) {
if(data->ssl) {
SSL_shutdown(data->ssl);
SSL_set_connect_state(data->ssl);
SSL_free (data->ssl);
data->ssl = NULL;
}
if(data->ctx) {
SSL_CTX_free (data->ctx);
data->ctx = NULL;
}
data->use_ssl = FALSE; /* get back to ordinary socket usage */
}
#endif /* USE_SSLEAY */
/* close possibly still open sockets */
if(-1 != data->secondarysocket) {
sclose(data->secondarysocket);
data->secondarysocket = -1;
}
if(-1 != data->firstsocket) {
sclose(data->firstsocket);
data->firstsocket=-1;
}
if(data->ptr_proxyuserpwd) {
free(data->ptr_proxyuserpwd);
data->ptr_proxyuserpwd=NULL;
}
if(data->ptr_uagent) {
free(data->ptr_uagent);
data->ptr_uagent=NULL;
}
if(data->ptr_userpwd) {
free(data->ptr_userpwd);
data->ptr_userpwd=NULL;
}
if(data->ptr_rangeline) {
free(data->ptr_rangeline);
data->ptr_rangeline=NULL;
}
if(data->ptr_ref) {
free(data->ptr_ref);
data->ptr_ref=NULL;
}
if(data->ptr_cookie) {
free(data->ptr_cookie);
data->ptr_cookie=NULL;
}
if(data->ptr_host) {
free(data->ptr_host);
data->ptr_host=NULL;
}
if(totally) {
/* we let the switch decide whether we're doing a part or total
cleanup */
/* check for allocated [URL] memory to free: */
if(data->freethis)
free(data->freethis);
if(data->headerbuff)
free(data->headerbuff);
cookie_cleanup(data->cookies);
free(data);
/* winsock crap cleanup */
cleanup();
}
}
typedef int (*func_T)(void);
UrgError curl_urlget(UrgTag tag, ...)
{
va_list arg;
func_T param_func = (func_T)0;
long param_long = 0;
void *param_obj = NULL;
UrgError res;
char *cookiefile;
struct UrlData *data;
/* this is for the lame win32 socket crap */
if(init())
return URG_FAILED_INIT;
data = (struct UrlData *)malloc(sizeof(struct UrlData));
if(data) {
memset(data, 0, sizeof(struct UrlData));
/* Let's set some default values: */
data->out = stdout; /* default output to stdout */
data->in = stdin; /* default input from stdin */
data->err = stderr; /* default stderr to stderr */
data->firstsocket = -1; /* no file descriptor */
data->secondarysocket = -1; /* no file descriptor */
/* use fwrite as default function to store output */
data->fwrite = (size_t (*)(char *, size_t, size_t, FILE *))fwrite;
/* use fread as default function to read input */
data->fread = (size_t (*)(char *, size_t, size_t, FILE *))fread;
data->infilesize = -1; /* we don't know any size */
data->current_speed = -1; /* init to negative == impossible */
va_start(arg, tag);
while(tag != URGTAG_DONE) {
/* PORTING NOTE:
Ojbect pointers can't necessarily be casted to function pointers and
therefore we need to know what type it is and read the correct type
at once. This should also correct problems with different sizes of
the types.
*/
if(tag < URGTYPE_OBJECTPOINT) {
/* This is a LONG type */
param_long = va_arg(arg, long);
}
else if(tag < URGTYPE_FUNCTIONPOINT) {
/* This is a object pointer type */
param_obj = va_arg(arg, void *);
}
else
param_func = va_arg(arg, func_T );
/* printf("tag: %d\n", tag); */
switch(tag) {
#ifdef MULTIDOC
case URGTAG_MOREDOCS:
data->moredoc = (struct MoreDoc *)param_obj;
break;
#endif
case URGTAG_TIMECONDITION:
data->timecondition = (long)param_long;
break;
case URGTAG_TIMEVALUE:
data->timevalue = (long)param_long;
break;
case URGTAG_SSLVERSION:
data->ssl_version = (int)param_long;
break;
case URGTAG_COOKIEFILE:
cookiefile = (char *)param_obj;
if(cookiefile) {
data->cookies = cookie_init(cookiefile);
}
break;
case URGTAG_WRITEHEADER:
data->writeheader = (FILE *)param_obj;
break;
case URGTAG_COOKIE:
data->cookie = (char *)param_obj;
break;
case URGTAG_ERRORBUFFER:
data->errorbuffer = (char *)param_obj;
break;
case URGTAG_FILE:
data->out = (FILE *)param_obj;
break;
case URGTAG_FTPPORT:
data->ftpport = (char *)param_obj;
break;
case URGTAG_HTTPHEADER:
data->headers = (struct HttpHeader *)param_obj;
break;
case URGTAG_CUSTOMREQUEST:
data->customrequest = (char *)param_obj;
break;
case URGTAG_HTTPPOST:
data->httppost = (struct HttpPost *)param_obj;
break;
case URGTAG_INFILE:
data->in = (FILE *)param_obj;
break;
case URGTAG_INFILESIZE:
data->infilesize = (long)param_long;
break;
case URGTAG_LOW_SPEED_LIMIT:
data->low_speed_limit=(long)param_long;
break;
case URGTAG_LOW_SPEED_TIME:
data->low_speed_time=(long)param_long;
break;
case URGTAG_URL:
data->url = (char *)param_obj;
break;
case URGTAG_PORT:
/* this typecast is used to fool the compiler to NOT warn for a
"cast from pointer to integer of different size" */
data->port = (unsigned short)((long)param_long);
break;
case URGTAG_POSTFIELDS:
data->postfields = (char *)param_obj;
break;
case URGTAG_PROGRESSMODE:
data->progress.mode = (long)param_long;
break;
case URGTAG_REFERER:
data->referer = (char *)param_obj;
break;
case URGTAG_PROXY:
data->proxy = (char *)param_obj;
break;
case URGTAG_FLAGS:
data->conf = (long)param_long;
break;
case URGTAG_TIMEOUT:
data->timeout = (long)param_long;
break;
case URGTAG_USERAGENT:
data->useragent = (char *)param_obj;
break;
case URGTAG_USERPWD:
data->userpwd = (char *)param_obj;
break;
case URGTAG_POSTQUOTE:
data->postquote = (struct curl_slist *)param_obj;
break;
case URGTAG_PROXYUSERPWD:
data->proxyuserpwd = (char *)param_obj;
break;
case URGTAG_RANGE:
data->range = (char *)param_obj;
break;
case URGTAG_RESUME_FROM:
data->resume_from = (long)param_long;
break;
case URGTAG_STDERR:
data->err = (FILE *)param_obj;
break;
case URGTAG_WRITEFUNCTION:
data->fwrite = (size_t (*)(char *, size_t, size_t, FILE *))param_func;
break;
case URGTAG_WRITEINFO:
data->writeinfo = (char *)param_obj;
break;
case URGTAG_READFUNCTION:
data->fread = (size_t (*)(char *, size_t, size_t, FILE *))param_func;
break;
case URGTAG_SSLCERT:
data->cert = (char *)param_obj;
break;
case URGTAG_SSLCERTPASSWD:
data->cert_passwd = (char *)param_obj;
break;
case URGTAG_CRLF:
data->crlf = (long)param_long;
break;
case URGTAG_QUOTE:
data->quote = (struct curl_slist *)param_obj;
break;
case URGTAG_DONE: /* done with the parsing, fall through */
continue;
default:
/* unknown tag and its companion, just ignore: */
break;
}
tag = va_arg(arg, UrgTag);
}
va_end(arg);
pgrsMode(data, data->progress.mode);
pgrsStartNow(data);
data-> headerbuff=(char*)malloc(HEADERSIZE);
if(!data->headerbuff)
return URG_FAILED_INIT;
data-> headersize=HEADERSIZE;
res = _urlget(data); /* fetch the URL please */
while((res == URG_OK) && data->newurl) {
/* Location: redirect */
char prot[16];
char path[URL_MAX_LENGTH];
if(2 != sscanf(data->newurl, "%15[^:]://%" URL_MAX_LENGTH_TXT
"s", prot, path)) {
/***
*DANG* this is an RFC 2068 violation. The URL is supposed
to be absolute and this doesn't seem to be that!
***
Instead, we have to TRY to append this new path to the old URL
to the right of the host part. Oh crap, this is doomed to cause
problems in the future...
*/
char *protsep;
char *pathsep;
char *newest;
/* protsep points to the start of the host name */
protsep=strstr(data->url, "//");
if(!protsep)
protsep=data->url;
else {
data->port=0; /* we got a full URL and then we should reset the
port number here to re-initiate it later */
protsep+=2; /* pass the // */
}
if('/' != data->newurl[0]) {
/* First we need to find out if there's a ?-letter in the URL, and
cut it and the right-side of that off */
pathsep = strrchr(protsep, '?');
if(pathsep)
*pathsep=0;
/* we have a relative path to append to the last slash if
there's one available */
pathsep = strrchr(protsep, '/');
if(pathsep)
*pathsep=0;
}
else {
/* We got a new absolute path for this server, cut off from the
first slash */
pathsep = strchr(protsep, '/');
if(pathsep)
*pathsep=0;
}
newest=(char *)malloc( strlen(data->url) +
1 + /* possible slash */
strlen(data->newurl) + 1/* zero byte */);
if(!newest)
return URG_OUT_OF_MEMORY;
sprintf(newest, "%s%s%s", data->url, ('/' == data->newurl[0])?"":"/",
data->newurl);
free(data->newurl);
data->newurl = newest;
}
data->url = data->newurl;
data->newurl = NULL; /* don't show! */
infof(data, "Follows Location: to new URL: '%s'\n", data->url);
/* clean up the sockets and SSL stuff from the previous "round" */
urlfree(data, FALSE);
res = _urlget(data);
}
if(data->newurl)
free(data->newurl);
}
else
res = URG_FAILED_INIT; /* failed */
if((URG_OK == res) && data->writeinfo) {
/* Time to output some info to stdout */
WriteOut(data);
}
/* total cleanup */
urlfree(data, TRUE);
return res;
}
/*
* Read everything until a newline.
*/
static int GetLine(int sockfd, char *buf,
struct UrlData *data)
{
int nread;
int read_rc=1;
char *ptr;
ptr=buf;
/* get us a full line, terminated with a newline */
for(nread=0;
(nread<BUFSIZE) && read_rc;
nread++, ptr++) {
#ifdef USE_SSLEAY
if (data->use_ssl) {
read_rc = SSL_read(data->ssl, ptr, 1);
}
else {
#endif
read_rc = sread(sockfd, ptr, 1);
#ifdef USE_SSLEAY
}
#endif /* USE_SSLEAY */
if (*ptr == '\n')
break;
}
*ptr=0; /* zero terminate */
if(data->conf & CONF_VERBOSE) {
fputs("< ", data->err);
fwrite(buf, 1, nread, data->err);
fputs("\n", data->err);
}
return nread;
}
#ifndef WIN32
#ifndef RETSIGTYPE
#define RETSIGTYPE void
#endif
RETSIGTYPE alarmfunc(int signal)
{
/* this is for "-ansi -Wall -pedantic" to stop complaining! (rabe) */
(void)signal;
return;
}
#endif
/* ====================================================== */
/*
* urlget <url>
* (result put on stdout)
*
* <url> ::= <proto> "://" <host> [ ":" <port> ] "/" <path>
*
* <proto> = "HTTP" | "HTTPS" | "GOPHER" | "FTP"
*
* When FTP:
*
* <host> ::= [ <user> ":" <password> "@" ] <host>
*/
static UrgError _urlget(struct UrlData *data)
{
struct hostent *hp=NULL;
struct sockaddr_in serv_addr;
char *buf;
char proto[64];
char gname[256]="default.com";
char *name;
char path[URL_MAX_LENGTH]="/";
char *ppath, *tmp;
long bytecount;
struct timeval now;
UrgError result;
char resumerange[12]="";
buf = data->buffer; /* this is our buffer */
#if 0
signal(SIGALRM, alarmfunc);
#endif
/* Parse <url> */
/* We need to parse the url, even when using the proxy, because
* we will need the hostname and port in case we are trying
* to SSL connect through the proxy -- and we don't know if we
* will need to use SSL until we parse the url ...
*/
if((1 == sscanf(data->url, "file://%" URL_MAX_LENGTH_TXT "[^\n]",
path))) {
/* we deal with file://<host>/<path> differently since it
supports no hostname other than "localhost" and "127.0.0.1",
which ist unique among the protocols specified in RFC 1738 */
if (strstr(path, "localhost/") || strstr(path, "127.0.0.1/"))
strcpy(path, &path[10]); /* ... since coincidentally
both host strings are of
equal length */
/* otherwise, <host>/ is quietly ommitted */
/* that's it, no more fiddling with proxies, redirections,
or SSL for files, go directly to the file reading function */
result = file(data, path, &bytecount);
if(result)
return result;
return URG_OK;
}
else if (2 > sscanf(data->url, "%64[^\n:]://%256[^\n/]%" URL_MAX_LENGTH_TXT "[^\n]",
proto, gname, path)) {
/* badly formatted, let's try the browser-style _without_ 'http://' */
if((1 > sscanf(data->url, "%256[^\n/]%" URL_MAX_LENGTH_TXT "[^\n]", gname,
path)) ) {
failf(data, "<url> malformed");
return URG_URL_MALFORMAT;
}
if(strnequal(gname, "FTP", 3)) {
strcpy(proto, "ftp");
}
else if(strnequal(gname, "GOPHER", 6))
strcpy(proto, "gopher");
#ifdef USE_SSLEAY
else if(strnequal(gname, "HTTPS", 5))
strcpy(proto, "https");
#endif /* USE_SSLEAY */
else if(strnequal(gname, "TELNET", 6))
strcpy(proto, "telnet");
else if (strnequal(gname, "DICT", sizeof("DICT")-1))
strcpy(proto, "DICT");
else if (strnequal(gname, "LDAP", sizeof("LDAP")-1))
strcpy(proto, "LDAP");
else
strcpy(proto, "http");
data->conf |= CONF_NOPROT;
}
if((data->conf & CONF_USERPWD) && ! (data->conf & CONF_NETRC)) {
if(':' != *data->userpwd) {
if((1 <= sscanf(data->userpwd, "%127[^:]:%127s",
data->user, data->passwd))) {
/* check for password, if no ask for one */
if( !data->passwd[0] )
{
strncpy(data->passwd, getpass("password: "), sizeof(data->passwd));
}
}
}
if(!data->user[0]) {
failf(data, "USER malformat: user name can't be zero length");
return URG_MALFORMAT_USER;
}
}
if(data->conf & CONF_PROXYUSERPWD) {
if(':' != *data->proxyuserpwd) {
if((1 <= sscanf(data->proxyuserpwd, "%127[^:]:%127s",
data->proxyuser, data->proxypasswd))) {
/* check for password, if no ask for one */
if( !data->proxypasswd[0] )
{
strncpy(data->proxypasswd, getpass("proxy password: "), sizeof(data->proxypasswd));
}
}
}
if(!data->proxyuser[0]) {
failf(data, " Proxy USER malformat: user name can't be zero length");
return URG_MALFORMAT_USER;
}
}
name = gname;
ppath = path;
data->hostname = name;
if(!(data->conf & CONF_PROXY)) {
/* If proxy was not specified, we check for default proxy environment
variables, to enable i.e Lynx compliance:
HTTP_PROXY http://some.server.dom:port/
HTTPS_PROXY http://some.server.dom:port/
FTP_PROXY http://some.server.dom:port/
GOPHER_PROXY http://some.server.dom:port/
NO_PROXY host.domain.dom (a comma-separated list of hosts which should
not be proxied, or an asterisk to override all proxy variables)
ALL_PROXY seems to exist for the CERN www lib. Probably the first to
check for.
*/
char *no_proxy=GetEnv("NO_PROXY");
char *proxy=NULL;
char proxy_env[128];
if(!no_proxy || !strequal("*", no_proxy)) {
/* NO_PROXY wasn't specified or it wasn't just an asterisk */
char *nope;
nope=no_proxy?strtok(no_proxy, ", "):NULL;
while(nope) {
if(strlen(nope) <= strlen(name)) {
char *checkn=
name + strlen(name) - strlen(nope);
if(strnequal(nope, checkn, strlen(nope))) {
/* no proxy for this host! */
break;
}
}
nope=strtok(NULL, ", ");
}
if(!nope) {
/* It was not listed as without proxy */
char *protop = proto;
char *envp = proxy_env;
char *prox;
/* Now, build <PROTOCOL>_PROXY and check for such a one to use */
while(*protop) {
*envp++ = toupper(*protop++);
}
/* append _PROXY */
strcpy(envp, "_PROXY");
#if 0
infof(data, "DEBUG: checks the environment variable %s\n", proxy_env);
#endif
/* read the protocol proxy: */
prox=GetEnv(proxy_env);
if(prox && *prox) { /* don't count "" strings */
proxy = prox; /* use this */
}
else
proxy = GetEnv("ALL_PROXY"); /* default proxy to use */
if(proxy && *proxy) {
/* we have a proxy here to set */
data->proxy = proxy;
data->conf |= CONF_PROXY;
}
} /* if (!nope) - it wasn't specfied non-proxy */
} /* NO_PROXY wasn't specified or '*' */
} /* if not using proxy */
if((data->conf & (CONF_PROXY|CONF_NOPROT)) == (CONF_PROXY|CONF_NOPROT) ) {
/* We're guessing prefixes here and since we're told to use a proxy, we
need to add the protocol prefix to the URL string before we continue!
*/
char *reurl;
reurl = maprintf("%s://%s", proto, data->url);
if(!reurl)
return URG_OUT_OF_MEMORY;
data->url = reurl;
if(data->freethis)
free(data->freethis);
data->freethis = reurl;
data->conf &= ~CONF_NOPROT; /* switch that one off again */
}
/* RESUME on a HTTP page is a tricky business. First, let's just check that
'range' isn't used, then set the range parameter and leave the resume as
it is to inform about this situation for later use. We will then
"attempt" to resume, and if we're talking to a HTTP/1.1 (or later)
server, we will get the document resumed. If we talk to a HTTP/1.0
server, we just fail since we can't rewind the file writing from within
this function. */
if(data->resume_from) {
if(!(data->conf & CONF_RANGE)) {
/* if it already was in use, we just skip this */
sprintf(resumerange, "%d-", data->resume_from);
data->range=resumerange; /* tell ourselves to fetch this range */
data->conf |= CONF_RANGE; /* switch on range usage */
}
}
if(data->timeout) {
/* We set the timeout on the connection/resolving phase first, separately
from the download/upload part to allow a maximum time on everything */
myalarm(data->timeout); /* this sends a signal when the timeout fires
off, and that will abort system calls */
}
/*
* Hmm, if we are using a proxy, then we can skip the GOPHER and the
* FTP steps, although we cannot skip the HTTPS step (since the proxy
* works differently, depending on whether its SSL or not).
*/
if (strequal(proto, "HTTP")) {
if(!data->port)
data->port = PORT_HTTP;
data->remote_port = PORT_HTTP;
data->conf |= CONF_HTTP;
}
else if (strequal(proto, "HTTPS")) {
#ifdef USE_SSLEAY
if(!data->port)
data->port = PORT_HTTPS;
data->remote_port = PORT_HTTPS;
data->conf |= CONF_HTTP;
data->conf |= CONF_HTTPS;
#else /* USE_SSLEAY */
failf(data, "SSL is disabled, https: not supported!");
return URG_UNSUPPORTED_PROTOCOL;
#endif /* !USE_SSLEAY */
}
else if (strequal(proto, "GOPHER")) {
if(!data->port)
data->port = PORT_GOPHER;
data->remote_port = PORT_GOPHER;
/* Skip /<item-type>/ in path if present */
if (isdigit((int)path[1])) {
ppath = strchr(&path[1], '/');
if (ppath == NULL)
ppath = path;
}
data->conf |= CONF_GOPHER;
}
else if(strequal(proto, "FTP")) {
char *type;
if(!data->port)
data->port = PORT_FTP;
data->remote_port = PORT_FTP;
data->conf |= CONF_FTP;
ppath++; /* don't include the initial slash */
/* FTP URLs support an extension like ";type=<typecode>" that
we'll try to get now! */
type=strstr(ppath, ";type=");
if(!type) {
type=strstr(gname, ";type=");
}
if(type) {
char command;
*type=0;
command = toupper(type[6]);
switch(command) {
case 'A': /* ASCII mode */
data->conf |= CONF_FTPASCII;
break;
case 'D': /* directory mode */
data->conf |= CONF_FTPLISTONLY;
break;
case 'I': /* binary mode */
default:
/* switch off ASCII */
data->conf &= ~CONF_FTPASCII;
break;
}
}
}
else if(strequal(proto, "TELNET")) {
/* telnet testing factory */
data->conf |= CONF_TELNET;
if(!data->port)
data->port = PORT_TELNET;
data->remote_port = PORT_TELNET;
}
else if (strequal(proto, "DICT")) {
data->conf |= CONF_DICT;
if(!data->port)
data->port = PORT_DICT;
data->remote_port = PORT_DICT;
}
else if (strequal(proto, "LDAP")) {
data->conf |= CONF_LDAP;
if(!data->port)
data->port = PORT_LDAP;
data->remote_port = PORT_LDAP;
}
/* file:// is handled above */
/* else if (strequal(proto, "FILE")) {
data->conf |= CONF_FILE;
result = file(data, path, &bytecount);
if(result)
return result;
return URG_OK;
}*/
else {
failf(data, "Unsupported protocol: %s", proto);
return URG_UNSUPPORTED_PROTOCOL;
}
if(data->conf & CONF_NETRC) {
if(ParseNetrc(data->hostname, data->user, data->passwd)) {
infof(data, "Couldn't find host %s in the .netrc file, using defaults",
data->hostname);
}
/* weather we failed or not, we don't know which fields that were filled
in anyway */
if(!data->user[0])
strcpy(data->user, CURL_DEFAULT_USER);
if(!data->passwd[0])
strcpy(data->passwd, CURL_DEFAULT_PASSWORD);
if(data->conf & CONF_HTTP) {
data->conf |= CONF_USERPWD;
}
}
else if(!(data->conf & CONF_USERPWD) &&
(data->conf & (CONF_FTP|CONF_HTTP)) ) {
/* This is a FTP or HTTP URL, and we haven't got the user+password in
the extra parameter, we will now try to extract the possible
user+password pair in a string like:
ftp://user:password@ftp.my.site:8021/README */
char *ptr=NULL; /* assign to remove possible warnings */
if(':' == *name) {
failf(data, "URL malformat: user can't be zero length");
return URG_URL_MALFORMAT_USER;
}
if((1 <= sscanf(name, "%127[^:]:%127[^@]",
data->user, data->passwd)) && (ptr=strchr(name, '@'))) {
name = ++ptr;
data->conf |= CONF_USERPWD;
}
else {
strcpy(data->user, CURL_DEFAULT_USER);
strcpy(data->passwd, CURL_DEFAULT_PASSWORD);
}
}