1 /*
2 * nanohttp.c: minimalist HTTP GET implementation to fetch external subsets.
3 * focuses on size, streamability, reentrancy and portability
4 *
5 * This is clearly not a general purpose HTTP implementation
6 * If you look for one, check:
7 * http://www.w3.org/Library/
8 *
9 * See Copyright for the status of this software.
10 *
11 * daniel@veillard.com
12 */
13
14 #define NEED_SOCKETS
15 #define IN_LIBXML
16 #include "libxml.h"
17
18 #ifdef LIBXML_HTTP_ENABLED
19 #include <string.h>
20
21 #ifdef HAVE_STDLIB_H
22 #include <stdlib.h>
23 #endif
24 #ifdef HAVE_UNISTD_H
25 #include <unistd.h>
26 #endif
27 #ifdef HAVE_SYS_TYPES_H
28 #include <sys/types.h>
29 #endif
30 #ifdef HAVE_SYS_SOCKET_H
31 #include <sys/socket.h>
32 #endif
33 #ifdef HAVE_NETINET_IN_H
34 #include <netinet/in.h>
35 #endif
36 #ifdef HAVE_ARPA_INET_H
37 #include <arpa/inet.h>
38 #endif
39 #ifdef HAVE_NETDB_H
40 #include <netdb.h>
41 #endif
42 #ifdef HAVE_RESOLV_H
43 #ifdef HAVE_ARPA_NAMESER_H
44 #include <arpa/nameser.h>
45 #endif
46 #include <resolv.h>
47 #endif
48 #ifdef HAVE_FCNTL_H
49 #include <fcntl.h>
50 #endif
51 #ifdef HAVE_ERRNO_H
52 #include <errno.h>
53 #endif
54 #ifdef HAVE_SYS_TIME_H
55 #include <sys/time.h>
56 #endif
57 #ifdef HAVE_SYS_SELECT_H
58 #include <sys/select.h>
59 #endif
60 #ifdef HAVE_STRINGS_H
61 #include <strings.h>
62 #endif
63 #ifdef SUPPORT_IP6
64 #include <resolv.h>
65 #endif
66 #ifdef HAVE_ZLIB_H
67 #include <zlib.h>
68 #endif
69
70
71 #ifdef VMS
72 #include <stropts>
73 #define XML_SOCKLEN_T unsigned int
74 #define SOCKET int
75 #endif
76
77 #if defined(__MINGW32__) || defined(_WIN32_WCE)
78 #define _WINSOCKAPI_
79 #include <wsockcompat.h>
80 #include <winsock2.h>
81 #undef XML_SOCKLEN_T
82 #define XML_SOCKLEN_T unsigned int
83 #endif
84
85
86 #include <libxml/globals.h>
87 #include <libxml/xmlerror.h>
88 #include <libxml/xmlmemory.h>
89 #include <libxml/parser.h> /* for xmlStr(n)casecmp() */
90 #include <libxml/nanohttp.h>
91 #include <libxml/globals.h>
92 #include <libxml/uri.h>
93
94 /**
95 * A couple portability macros
96 */
97 #ifndef _WINSOCKAPI_
98 #ifndef __BEOS__
99 #define closesocket(s) close(s)
100 #endif
101 #define SOCKET int
102 #endif
103
104 #ifdef __BEOS__
105 #ifndef PF_INET
106 #define PF_INET AF_INET
107 #endif
108 #endif
109
110 #ifndef XML_SOCKLEN_T
111 #define XML_SOCKLEN_T unsigned int
112 #endif
113 #ifndef SOCKET
114 #define SOCKET int
115 #endif
116
117 #ifdef STANDALONE
118 #define DEBUG_HTTP
119 #define xmlStrncasecmp(a, b, n) strncasecmp((char *)a, (char *)b, n)
120 #define xmlStrcasecmpi(a, b) strcasecmp((char *)a, (char *)b)
121 #endif
122
123 #define XML_NANO_HTTP_MAX_REDIR 10
124
125 #define XML_NANO_HTTP_CHUNK 4096
126
127 #define XML_NANO_HTTP_CLOSED 0
128 #define XML_NANO_HTTP_WRITE 1
129 #define XML_NANO_HTTP_READ 2
130 #define XML_NANO_HTTP_NONE 4
131
132 typedef struct xmlNanoHTTPCtxt {
133 char *protocol; /* the protocol name */
134 char *hostname; /* the host name */
135 int port; /* the port */
136 char *path; /* the path within the URL */
137 char *query; /* the query string */
138 SOCKET fd; /* the file descriptor for the socket */
139 int state; /* WRITE / READ / CLOSED */
140 char *out; /* buffer sent (zero terminated) */
141 char *outptr; /* index within the buffer sent */
142 char *in; /* the receiving buffer */
143 char *content; /* the start of the content */
144 char *inptr; /* the next byte to read from network */
145 char *inrptr; /* the next byte to give back to the client */
146 int inlen; /* len of the input buffer */
147 int last; /* return code for last operation */
148 int returnValue; /* the protocol return value */
149 int ContentLength; /* specified content length from HTTP header */
150 char *contentType; /* the MIME type for the input */
151 char *location; /* the new URL in case of redirect */
152 char *authHeader; /* contents of {WWW,Proxy}-Authenticate header */
153 char *encoding; /* encoding extracted from the contentType */
154 char *mimeType; /* Mime-Type extracted from the contentType */
155 #ifdef HAVE_ZLIB_H
156 z_stream *strm; /* Zlib stream object */
157 int usesGzip; /* "Content-Encoding: gzip" was detected */
158 #endif
159 } xmlNanoHTTPCtxt, *xmlNanoHTTPCtxtPtr;
160
161 static int initialized = 0;
162 static char *proxy = NULL; /* the proxy name if any */
163 static int proxyPort; /* the proxy port if any */
164 static unsigned int timeout = 60;/* the select() timeout in seconds */
165
166 static int xmlNanoHTTPFetchContent( void * ctx, char ** ptr, int * len );
167
168 /**
169 * xmlHTTPErrMemory:
170 * @extra: extra informations
171 *
172 * Handle an out of memory condition
173 */
174 static void
xmlHTTPErrMemory(const char * extra)175 xmlHTTPErrMemory(const char *extra)
176 {
177 __xmlSimpleError(XML_FROM_HTTP, XML_ERR_NO_MEMORY, NULL, NULL, extra);
178 }
179
180 /**
181 * A portability function
182 */
socket_errno(void)183 static int socket_errno(void) {
184 #ifdef _WINSOCKAPI_
185 return(WSAGetLastError());
186 #else
187 return(errno);
188 #endif
189 }
190
191 #ifdef SUPPORT_IP6
192 static
have_ipv6(void)193 int have_ipv6(void) {
194 int s;
195
196 s = socket (AF_INET6, SOCK_STREAM, 0);
197 if (s != -1) {
198 close (s);
199 return (1);
200 }
201 return (0);
202 }
203 #endif
204
205 /**
206 * xmlNanoHTTPInit:
207 *
208 * Initialize the HTTP protocol layer.
209 * Currently it just checks for proxy informations
210 */
211
212 void
xmlNanoHTTPInit(void)213 xmlNanoHTTPInit(void) {
214 const char *env;
215 #ifdef _WINSOCKAPI_
216 WSADATA wsaData;
217 #endif
218
219 if (initialized)
220 return;
221
222 #ifdef _WINSOCKAPI_
223 if (WSAStartup(MAKEWORD(1, 1), &wsaData) != 0)
224 return;
225 #endif
226
227 if (proxy == NULL) {
228 proxyPort = 80;
229 env = getenv("no_proxy");
230 if (env && ((env[0] == '*') && (env[1] == 0)))
231 goto done;
232 env = getenv("http_proxy");
233 if (env != NULL) {
234 xmlNanoHTTPScanProxy(env);
235 goto done;
236 }
237 env = getenv("HTTP_PROXY");
238 if (env != NULL) {
239 xmlNanoHTTPScanProxy(env);
240 goto done;
241 }
242 }
243 done:
244 initialized = 1;
245 }
246
247 /**
248 * xmlNanoHTTPCleanup:
249 *
250 * Cleanup the HTTP protocol layer.
251 */
252
253 void
xmlNanoHTTPCleanup(void)254 xmlNanoHTTPCleanup(void) {
255 if (proxy != NULL) {
256 xmlFree(proxy);
257 proxy = NULL;
258 }
259 #ifdef _WINSOCKAPI_
260 if (initialized)
261 WSACleanup();
262 #endif
263 initialized = 0;
264 return;
265 }
266
267 /**
268 * xmlNanoHTTPScanURL:
269 * @ctxt: an HTTP context
270 * @URL: The URL used to initialize the context
271 *
272 * (Re)Initialize an HTTP context by parsing the URL and finding
273 * the protocol host port and path it indicates.
274 */
275
276 static void
xmlNanoHTTPScanURL(xmlNanoHTTPCtxtPtr ctxt,const char * URL)277 xmlNanoHTTPScanURL(xmlNanoHTTPCtxtPtr ctxt, const char *URL) {
278 xmlURIPtr uri;
279 /*
280 * Clear any existing data from the context
281 */
282 if (ctxt->protocol != NULL) {
283 xmlFree(ctxt->protocol);
284 ctxt->protocol = NULL;
285 }
286 if (ctxt->hostname != NULL) {
287 xmlFree(ctxt->hostname);
288 ctxt->hostname = NULL;
289 }
290 if (ctxt->path != NULL) {
291 xmlFree(ctxt->path);
292 ctxt->path = NULL;
293 }
294 if (ctxt->query != NULL) {
295 xmlFree(ctxt->query);
296 ctxt->query = NULL;
297 }
298 if (URL == NULL) return;
299
300 uri = xmlParseURIRaw(URL, 1);
301 if (uri == NULL)
302 return;
303
304 if ((uri->scheme == NULL) || (uri->server == NULL)) {
305 xmlFreeURI(uri);
306 return;
307 }
308
309 ctxt->protocol = xmlMemStrdup(uri->scheme);
310 ctxt->hostname = xmlMemStrdup(uri->server);
311 if (uri->path != NULL)
312 ctxt->path = xmlMemStrdup(uri->path);
313 else
314 ctxt->path = xmlMemStrdup("/");
315 if (uri->query != NULL)
316 ctxt->query = xmlMemStrdup(uri->query);
317 if (uri->port != 0)
318 ctxt->port = uri->port;
319
320 xmlFreeURI(uri);
321 }
322
323 /**
324 * xmlNanoHTTPScanProxy:
325 * @URL: The proxy URL used to initialize the proxy context
326 *
327 * (Re)Initialize the HTTP Proxy context by parsing the URL and finding
328 * the protocol host port it indicates.
329 * Should be like http://myproxy/ or http://myproxy:3128/
330 * A NULL URL cleans up proxy informations.
331 */
332
333 void
xmlNanoHTTPScanProxy(const char * URL)334 xmlNanoHTTPScanProxy(const char *URL) {
335 xmlURIPtr uri;
336
337 if (proxy != NULL) {
338 xmlFree(proxy);
339 proxy = NULL;
340 }
341 proxyPort = 0;
342
343 #ifdef DEBUG_HTTP
344 if (URL == NULL)
345 xmlGenericError(xmlGenericErrorContext,
346 "Removing HTTP proxy info\n");
347 else
348 xmlGenericError(xmlGenericErrorContext,
349 "Using HTTP proxy %s\n", URL);
350 #endif
351 if (URL == NULL) return;
352
353 uri = xmlParseURIRaw(URL, 1);
354 if ((uri == NULL) || (uri->scheme == NULL) ||
355 (strcmp(uri->scheme, "http")) || (uri->server == NULL)) {
356 __xmlIOErr(XML_FROM_HTTP, XML_HTTP_URL_SYNTAX, "Syntax Error\n");
357 if (uri != NULL)
358 xmlFreeURI(uri);
359 return;
360 }
361
362 proxy = xmlMemStrdup(uri->server);
363 if (uri->port != 0)
364 proxyPort = uri->port;
365
366 xmlFreeURI(uri);
367 }
368
369 /**
370 * xmlNanoHTTPNewCtxt:
371 * @URL: The URL used to initialize the context
372 *
373 * Allocate and initialize a new HTTP context.
374 *
375 * Returns an HTTP context or NULL in case of error.
376 */
377
378 static xmlNanoHTTPCtxtPtr
xmlNanoHTTPNewCtxt(const char * URL)379 xmlNanoHTTPNewCtxt(const char *URL) {
380 xmlNanoHTTPCtxtPtr ret;
381
382 ret = (xmlNanoHTTPCtxtPtr) xmlMalloc(sizeof(xmlNanoHTTPCtxt));
383 if (ret == NULL) {
384 xmlHTTPErrMemory("allocating context");
385 return(NULL);
386 }
387
388 memset(ret, 0, sizeof(xmlNanoHTTPCtxt));
389 ret->port = 80;
390 ret->returnValue = 0;
391 ret->fd = -1;
392 ret->ContentLength = -1;
393
394 xmlNanoHTTPScanURL(ret, URL);
395
396 return(ret);
397 }
398
399 /**
400 * xmlNanoHTTPFreeCtxt:
401 * @ctxt: an HTTP context
402 *
403 * Frees the context after closing the connection.
404 */
405
406 static void
xmlNanoHTTPFreeCtxt(xmlNanoHTTPCtxtPtr ctxt)407 xmlNanoHTTPFreeCtxt(xmlNanoHTTPCtxtPtr ctxt) {
408 if (ctxt == NULL) return;
409 if (ctxt->hostname != NULL) xmlFree(ctxt->hostname);
410 if (ctxt->protocol != NULL) xmlFree(ctxt->protocol);
411 if (ctxt->path != NULL) xmlFree(ctxt->path);
412 if (ctxt->query != NULL) xmlFree(ctxt->query);
413 if (ctxt->out != NULL) xmlFree(ctxt->out);
414 if (ctxt->in != NULL) xmlFree(ctxt->in);
415 if (ctxt->contentType != NULL) xmlFree(ctxt->contentType);
416 if (ctxt->encoding != NULL) xmlFree(ctxt->encoding);
417 if (ctxt->mimeType != NULL) xmlFree(ctxt->mimeType);
418 if (ctxt->location != NULL) xmlFree(ctxt->location);
419 if (ctxt->authHeader != NULL) xmlFree(ctxt->authHeader);
420 #ifdef HAVE_ZLIB_H
421 if (ctxt->strm != NULL) {
422 inflateEnd(ctxt->strm);
423 xmlFree(ctxt->strm);
424 }
425 #endif
426
427 ctxt->state = XML_NANO_HTTP_NONE;
428 if (ctxt->fd >= 0) closesocket(ctxt->fd);
429 ctxt->fd = -1;
430 xmlFree(ctxt);
431 }
432
433 /**
434 * xmlNanoHTTPSend:
435 * @ctxt: an HTTP context
436 *
437 * Send the input needed to initiate the processing on the server side
438 * Returns number of bytes sent or -1 on error.
439 */
440
441 static int
xmlNanoHTTPSend(xmlNanoHTTPCtxtPtr ctxt,const char * xmt_ptr,int outlen)442 xmlNanoHTTPSend(xmlNanoHTTPCtxtPtr ctxt, const char * xmt_ptr, int outlen) {
443
444 int total_sent = 0;
445
446 if ( (ctxt->state & XML_NANO_HTTP_WRITE) && (xmt_ptr != NULL ) ) {
447 while (total_sent < outlen) {
448 int nsent = send(ctxt->fd, xmt_ptr + total_sent,
449 outlen - total_sent, 0);
450 if (nsent>0)
451 total_sent += nsent;
452 else if ( ( nsent == -1 ) &&
453 #if defined(EAGAIN) && EAGAIN != EWOULDBLOCK
454 ( socket_errno( ) != EAGAIN ) &&
455 #endif
456 ( socket_errno( ) != EWOULDBLOCK ) ) {
457 __xmlIOErr(XML_FROM_HTTP, 0, "send failed\n");
458 if ( total_sent == 0 )
459 total_sent = -1;
460 break;
461 }
462 else {
463 /*
464 ** No data sent
465 ** Since non-blocking sockets are used, wait for
466 ** socket to be writable or default timeout prior
467 ** to retrying.
468 */
469
470 struct timeval tv;
471 fd_set wfd;
472
473 tv.tv_sec = timeout;
474 tv.tv_usec = 0;
475 FD_ZERO( &wfd );
476 #ifdef _MSC_VER
477 #pragma warning(push)
478 #pragma warning(disable: 4018)
479 #endif
480 FD_SET( ctxt->fd, &wfd );
481 #ifdef _MSC_VER
482 #pragma warning(pop)
483 #endif
484 (void)select( ctxt->fd + 1, NULL, &wfd, NULL, &tv );
485 }
486 }
487 }
488
489 return total_sent;
490 }
491
492 /**
493 * xmlNanoHTTPRecv:
494 * @ctxt: an HTTP context
495 *
496 * Read information coming from the HTTP connection.
497 * This is a blocking call (but it blocks in select(), not read()).
498 *
499 * Returns the number of byte read or -1 in case of error.
500 */
501
502 static int
xmlNanoHTTPRecv(xmlNanoHTTPCtxtPtr ctxt)503 xmlNanoHTTPRecv(xmlNanoHTTPCtxtPtr ctxt) {
504 fd_set rfd;
505 struct timeval tv;
506
507
508 while (ctxt->state & XML_NANO_HTTP_READ) {
509 if (ctxt->in == NULL) {
510 ctxt->in = (char *) xmlMallocAtomic(65000 * sizeof(char));
511 if (ctxt->in == NULL) {
512 xmlHTTPErrMemory("allocating input");
513 ctxt->last = -1;
514 return(-1);
515 }
516 ctxt->inlen = 65000;
517 ctxt->inptr = ctxt->content = ctxt->inrptr = ctxt->in;
518 }
519 if (ctxt->inrptr > ctxt->in + XML_NANO_HTTP_CHUNK) {
520 int delta = ctxt->inrptr - ctxt->in;
521 int len = ctxt->inptr - ctxt->inrptr;
522
523 memmove(ctxt->in, ctxt->inrptr, len);
524 ctxt->inrptr -= delta;
525 ctxt->content -= delta;
526 ctxt->inptr -= delta;
527 }
528 if ((ctxt->in + ctxt->inlen) < (ctxt->inptr + XML_NANO_HTTP_CHUNK)) {
529 int d_inptr = ctxt->inptr - ctxt->in;
530 int d_content = ctxt->content - ctxt->in;
531 int d_inrptr = ctxt->inrptr - ctxt->in;
532 char * tmp_ptr = ctxt->in;
533
534 ctxt->inlen *= 2;
535 ctxt->in = (char *) xmlRealloc(tmp_ptr, ctxt->inlen);
536 if (ctxt->in == NULL) {
537 xmlHTTPErrMemory("allocating input buffer");
538 xmlFree( tmp_ptr );
539 ctxt->last = -1;
540 return(-1);
541 }
542 ctxt->inptr = ctxt->in + d_inptr;
543 ctxt->content = ctxt->in + d_content;
544 ctxt->inrptr = ctxt->in + d_inrptr;
545 }
546 ctxt->last = recv(ctxt->fd, ctxt->inptr, XML_NANO_HTTP_CHUNK, 0);
547 if (ctxt->last > 0) {
548 ctxt->inptr += ctxt->last;
549 return(ctxt->last);
550 }
551 if (ctxt->last == 0) {
552 return(0);
553 }
554 if (ctxt->last == -1) {
555 switch (socket_errno()) {
556 case EINPROGRESS:
557 case EWOULDBLOCK:
558 #if defined(EAGAIN) && EAGAIN != EWOULDBLOCK
559 case EAGAIN:
560 #endif
561 break;
562
563 case ECONNRESET:
564 case ESHUTDOWN:
565 return ( 0 );
566
567 default:
568 __xmlIOErr(XML_FROM_HTTP, 0, "recv failed\n");
569 return(-1);
570 }
571 }
572
573 tv.tv_sec = timeout;
574 tv.tv_usec = 0;
575 FD_ZERO(&rfd);
576 #ifdef _MSC_VER
577 #pragma warning(push)
578 #pragma warning(disable: 4018)
579 #endif
580 FD_SET(ctxt->fd, &rfd);
581 #ifdef _MSC_VER
582 #pragma warning(pop)
583 #endif
584
585 if ( (select(ctxt->fd+1, &rfd, NULL, NULL, &tv)<1)
586 #if defined(EINTR)
587 && (errno != EINTR)
588 #endif
589 )
590 return(0);
591 }
592 return(0);
593 }
594
595 /**
596 * xmlNanoHTTPReadLine:
597 * @ctxt: an HTTP context
598 *
599 * Read one line in the HTTP server output, usually for extracting
600 * the HTTP protocol informations from the answer header.
601 *
602 * Returns a newly allocated string with a copy of the line, or NULL
603 * which indicate the end of the input.
604 */
605
606 static char *
xmlNanoHTTPReadLine(xmlNanoHTTPCtxtPtr ctxt)607 xmlNanoHTTPReadLine(xmlNanoHTTPCtxtPtr ctxt) {
608 char buf[4096];
609 char *bp = buf;
610 int rc;
611
612 while (bp - buf < 4095) {
613 if (ctxt->inrptr == ctxt->inptr) {
614 if ( (rc = xmlNanoHTTPRecv(ctxt)) == 0) {
615 if (bp == buf)
616 return(NULL);
617 else
618 *bp = 0;
619 return(xmlMemStrdup(buf));
620 }
621 else if ( rc == -1 ) {
622 return ( NULL );
623 }
624 }
625 *bp = *ctxt->inrptr++;
626 if (*bp == '\n') {
627 *bp = 0;
628 return(xmlMemStrdup(buf));
629 }
630 if (*bp != '\r')
631 bp++;
632 }
633 buf[4095] = 0;
634 return(xmlMemStrdup(buf));
635 }
636
637
638 /**
639 * xmlNanoHTTPScanAnswer:
640 * @ctxt: an HTTP context
641 * @line: an HTTP header line
642 *
643 * Try to extract useful informations from the server answer.
644 * We currently parse and process:
645 * - The HTTP revision/ return code
646 * - The Content-Type, Mime-Type and charset used
647 * - The Location for redirect processing.
648 *
649 * Returns -1 in case of failure, the file descriptor number otherwise
650 */
651
652 static void
xmlNanoHTTPScanAnswer(xmlNanoHTTPCtxtPtr ctxt,const char * line)653 xmlNanoHTTPScanAnswer(xmlNanoHTTPCtxtPtr ctxt, const char *line) {
654 const char *cur = line;
655
656 if (line == NULL) return;
657
658 if (!strncmp(line, "HTTP/", 5)) {
659 int version = 0;
660 int ret = 0;
661
662 cur += 5;
663 while ((*cur >= '0') && (*cur <= '9')) {
664 version *= 10;
665 version += *cur - '0';
666 cur++;
667 }
668 if (*cur == '.') {
669 cur++;
670 if ((*cur >= '0') && (*cur <= '9')) {
671 version *= 10;
672 version += *cur - '0';
673 cur++;
674 }
675 while ((*cur >= '0') && (*cur <= '9'))
676 cur++;
677 } else
678 version *= 10;
679 if ((*cur != ' ') && (*cur != '\t')) return;
680 while ((*cur == ' ') || (*cur == '\t')) cur++;
681 if ((*cur < '0') || (*cur > '9')) return;
682 while ((*cur >= '0') && (*cur <= '9')) {
683 ret *= 10;
684 ret += *cur - '0';
685 cur++;
686 }
687 if ((*cur != 0) && (*cur != ' ') && (*cur != '\t')) return;
688 ctxt->returnValue = ret;
689 } else if (!xmlStrncasecmp(BAD_CAST line, BAD_CAST"Content-Type:", 13)) {
690 const xmlChar *charset, *last, *mime;
691 cur += 13;
692 while ((*cur == ' ') || (*cur == '\t')) cur++;
693 if (ctxt->contentType != NULL)
694 xmlFree(ctxt->contentType);
695 ctxt->contentType = xmlMemStrdup(cur);
696 mime = (const xmlChar *) cur;
697 last = mime;
698 while ((*last != 0) && (*last != ' ') && (*last != '\t') &&
699 (*last != ';') && (*last != ','))
700 last++;
701 if (ctxt->mimeType != NULL)
702 xmlFree(ctxt->mimeType);
703 ctxt->mimeType = (char *) xmlStrndup(mime, last - mime);
704 charset = xmlStrstr(BAD_CAST ctxt->contentType, BAD_CAST "charset=");
705 if (charset != NULL) {
706 charset += 8;
707 last = charset;
708 while ((*last != 0) && (*last != ' ') && (*last != '\t') &&
709 (*last != ';') && (*last != ','))
710 last++;
711 if (ctxt->encoding != NULL)
712 xmlFree(ctxt->encoding);
713 ctxt->encoding = (char *) xmlStrndup(charset, last - charset);
714 }
715 } else if (!xmlStrncasecmp(BAD_CAST line, BAD_CAST"ContentType:", 12)) {
716 const xmlChar *charset, *last, *mime;
717 cur += 12;
718 if (ctxt->contentType != NULL) return;
719 while ((*cur == ' ') || (*cur == '\t')) cur++;
720 ctxt->contentType = xmlMemStrdup(cur);
721 mime = (const xmlChar *) cur;
722 last = mime;
723 while ((*last != 0) && (*last != ' ') && (*last != '\t') &&
724 (*last != ';') && (*last != ','))
725 last++;
726 if (ctxt->mimeType != NULL)
727 xmlFree(ctxt->mimeType);
728 ctxt->mimeType = (char *) xmlStrndup(mime, last - mime);
729 charset = xmlStrstr(BAD_CAST ctxt->contentType, BAD_CAST "charset=");
730 if (charset != NULL) {
731 charset += 8;
732 last = charset;
733 while ((*last != 0) && (*last != ' ') && (*last != '\t') &&
734 (*last != ';') && (*last != ','))
735 last++;
736 if (ctxt->encoding != NULL)
737 xmlFree(ctxt->encoding);
738 ctxt->encoding = (char *) xmlStrndup(charset, last - charset);
739 }
740 } else if (!xmlStrncasecmp(BAD_CAST line, BAD_CAST"Location:", 9)) {
741 cur += 9;
742 while ((*cur == ' ') || (*cur == '\t')) cur++;
743 if (ctxt->location != NULL)
744 xmlFree(ctxt->location);
745 if (*cur == '/') {
746 xmlChar *tmp_http = xmlStrdup(BAD_CAST "http://");
747 xmlChar *tmp_loc =
748 xmlStrcat(tmp_http, (const xmlChar *) ctxt->hostname);
749 ctxt->location =
750 (char *) xmlStrcat (tmp_loc, (const xmlChar *) cur);
751 } else {
752 ctxt->location = xmlMemStrdup(cur);
753 }
754 } else if (!xmlStrncasecmp(BAD_CAST line, BAD_CAST"WWW-Authenticate:", 17)) {
755 cur += 17;
756 while ((*cur == ' ') || (*cur == '\t')) cur++;
757 if (ctxt->authHeader != NULL)
758 xmlFree(ctxt->authHeader);
759 ctxt->authHeader = xmlMemStrdup(cur);
760 } else if (!xmlStrncasecmp(BAD_CAST line, BAD_CAST"Proxy-Authenticate:", 19)) {
761 cur += 19;
762 while ((*cur == ' ') || (*cur == '\t')) cur++;
763 if (ctxt->authHeader != NULL)
764 xmlFree(ctxt->authHeader);
765 ctxt->authHeader = xmlMemStrdup(cur);
766 #ifdef HAVE_ZLIB_H
767 } else if ( !xmlStrncasecmp( BAD_CAST line, BAD_CAST"Content-Encoding:", 17) ) {
768 cur += 17;
769 while ((*cur == ' ') || (*cur == '\t')) cur++;
770 if ( !xmlStrncasecmp( BAD_CAST cur, BAD_CAST"gzip", 4) ) {
771 ctxt->usesGzip = 1;
772
773 ctxt->strm = xmlMalloc(sizeof(z_stream));
774
775 if (ctxt->strm != NULL) {
776 ctxt->strm->zalloc = Z_NULL;
777 ctxt->strm->zfree = Z_NULL;
778 ctxt->strm->opaque = Z_NULL;
779 ctxt->strm->avail_in = 0;
780 ctxt->strm->next_in = Z_NULL;
781
782 inflateInit2( ctxt->strm, 31 );
783 }
784 }
785 #endif
786 } else if ( !xmlStrncasecmp( BAD_CAST line, BAD_CAST"Content-Length:", 15) ) {
787 cur += 15;
788 ctxt->ContentLength = strtol( cur, NULL, 10 );
789 }
790 }
791
792 /**
793 * xmlNanoHTTPConnectAttempt:
794 * @addr: a socket address structure
795 *
796 * Attempt a connection to the given IP:port endpoint. It forces
797 * non-blocking semantic on the socket, and allow 60 seconds for
798 * the host to answer.
799 *
800 * Returns -1 in case of failure, the file descriptor number otherwise
801 */
802
803 static int
xmlNanoHTTPConnectAttempt(struct sockaddr * addr)804 xmlNanoHTTPConnectAttempt(struct sockaddr *addr)
805 {
806 fd_set wfd;
807 #ifdef _WINSOCKAPI_
808 fd_set xfd;
809 #endif
810 struct timeval tv;
811 int status;
812 int addrlen;
813 SOCKET s;
814
815 #ifdef SUPPORT_IP6
816 if (addr->sa_family == AF_INET6) {
817 s = socket (PF_INET6, SOCK_STREAM, IPPROTO_TCP);
818 addrlen = sizeof (struct sockaddr_in6);
819 }
820 else
821 #endif
822 {
823 s = socket (PF_INET, SOCK_STREAM, IPPROTO_TCP);
824 addrlen = sizeof (struct sockaddr_in);
825 }
826 if (s==-1) {
827 #ifdef DEBUG_HTTP
828 perror("socket");
829 #endif
830 __xmlIOErr(XML_FROM_HTTP, 0, "socket failed\n");
831 return(-1);
832 }
833
834 #ifdef _WINSOCKAPI_
835 {
836 u_long one = 1;
837
838 status = ioctlsocket(s, FIONBIO, &one) == SOCKET_ERROR ? -1 : 0;
839 }
840 #else /* _WINSOCKAPI_ */
841 #if defined(VMS)
842 {
843 int enable = 1;
844 status = ioctl(s, FIONBIO, &enable);
845 }
846 #else /* VMS */
847 #if defined(__BEOS__)
848 {
849 bool noblock = true;
850 status = setsockopt(s, SOL_SOCKET, SO_NONBLOCK, &noblock, sizeof(noblock));
851 }
852 #else /* __BEOS__ */
853 if ((status = fcntl(s, F_GETFL, 0)) != -1) {
854 #ifdef O_NONBLOCK
855 status |= O_NONBLOCK;
856 #else /* O_NONBLOCK */
857 #ifdef F_NDELAY
858 status |= F_NDELAY;
859 #endif /* F_NDELAY */
860 #endif /* !O_NONBLOCK */
861 status = fcntl(s, F_SETFL, status);
862 }
863 if (status < 0) {
864 #ifdef DEBUG_HTTP
865 perror("nonblocking");
866 #endif
867 __xmlIOErr(XML_FROM_HTTP, 0, "error setting non-blocking IO\n");
868 closesocket(s);
869 return(-1);
870 }
871 #endif /* !__BEOS__ */
872 #endif /* !VMS */
873 #endif /* !_WINSOCKAPI_ */
874
875 if (connect (s, addr, addrlen) == -1) {
876 switch (socket_errno()) {
877 case EINPROGRESS:
878 case EWOULDBLOCK:
879 break;
880 default:
881 __xmlIOErr(XML_FROM_HTTP, 0, "error connecting to HTTP server");
882 closesocket(s);
883 return(-1);
884 }
885 }
886
887 tv.tv_sec = timeout;
888 tv.tv_usec = 0;
889
890 #ifdef _MSC_VER
891 #pragma warning(push)
892 #pragma warning(disable: 4018)
893 #endif
894 FD_ZERO(&wfd);
895 FD_SET(s, &wfd);
896
897 #ifdef _WINSOCKAPI_
898 FD_ZERO(&xfd);
899 FD_SET(s, &xfd);
900
901 switch(select(s+1, NULL, &wfd, &xfd, &tv))
902 #else
903 switch(select(s+1, NULL, &wfd, NULL, &tv))
904 #endif
905 #ifdef _MSC_VER
906 #pragma warning(pop)
907 #endif
908 {
909 case 0:
910 /* Time out */
911 __xmlIOErr(XML_FROM_HTTP, 0, "Connect attempt timed out");
912 closesocket(s);
913 return(-1);
914 case -1:
915 /* Ermm.. ?? */
916 __xmlIOErr(XML_FROM_HTTP, 0, "Connect failed");
917 closesocket(s);
918 return(-1);
919 }
920
921 if ( FD_ISSET(s, &wfd)
922 #ifdef _WINSOCKAPI_
923 || FD_ISSET(s, &xfd)
924 #endif
925 ) {
926 XML_SOCKLEN_T len;
927 len = sizeof(status);
928 #ifdef SO_ERROR
929 if (getsockopt(s, SOL_SOCKET, SO_ERROR, (char*)&status, &len) < 0 ) {
930 /* Solaris error code */
931 __xmlIOErr(XML_FROM_HTTP, 0, "getsockopt failed\n");
932 return (-1);
933 }
934 #endif
935 if ( status ) {
936 __xmlIOErr(XML_FROM_HTTP, 0, "Error connecting to remote host");
937 closesocket(s);
938 errno = status;
939 return (-1);
940 }
941 } else {
942 /* pbm */
943 __xmlIOErr(XML_FROM_HTTP, 0, "select failed\n");
944 closesocket(s);
945 return (-1);
946 }
947
948 return(s);
949 }
950
951 /**
952 * xmlNanoHTTPConnectHost:
953 * @host: the host name
954 * @port: the port number
955 *
956 * Attempt a connection to the given host:port endpoint. It tries
957 * the multiple IP provided by the DNS if available.
958 *
959 * Returns -1 in case of failure, the file descriptor number otherwise
960 */
961
962 static int
xmlNanoHTTPConnectHost(const char * host,int port)963 xmlNanoHTTPConnectHost(const char *host, int port)
964 {
965 struct hostent *h;
966 struct sockaddr *addr = NULL;
967 struct in_addr ia;
968 struct sockaddr_in sockin;
969
970 #ifdef SUPPORT_IP6
971 struct in6_addr ia6;
972 struct sockaddr_in6 sockin6;
973 #endif
974 int i;
975 int s;
976
977 memset (&sockin, 0, sizeof(sockin));
978 #ifdef SUPPORT_IP6
979 memset (&sockin6, 0, sizeof(sockin6));
980 #endif
981
982 #if !defined(HAVE_GETADDRINFO) && defined(SUPPORT_IP6) && defined(RES_USE_INET6)
983 if (have_ipv6 ())
984 {
985 if (!(_res.options & RES_INIT))
986 res_init();
987 _res.options |= RES_USE_INET6;
988 }
989 #endif
990
991 #if defined(HAVE_GETADDRINFO) && defined(SUPPORT_IP6) && !defined(_WIN32)
992 if (have_ipv6 ())
993 #endif
994 #if defined(HAVE_GETADDRINFO) && (defined(SUPPORT_IP6) || defined(_WIN32))
995 {
996 int status;
997 struct addrinfo hints, *res, *result;
998
999 result = NULL;
1000 memset (&hints, 0,sizeof(hints));
1001 hints.ai_socktype = SOCK_STREAM;
1002
1003 status = getaddrinfo (host, NULL, &hints, &result);
1004 if (status) {
1005 __xmlIOErr(XML_FROM_HTTP, 0, "getaddrinfo failed\n");
1006 return (-1);
1007 }
1008
1009 for (res = result; res; res = res->ai_next) {
1010 if (res->ai_family == AF_INET) {
1011 if (res->ai_addrlen > sizeof(sockin)) {
1012 __xmlIOErr(XML_FROM_HTTP, 0, "address size mismatch\n");
1013 freeaddrinfo (result);
1014 return (-1);
1015 }
1016 memcpy (&sockin, res->ai_addr, res->ai_addrlen);
1017 sockin.sin_port = htons (port);
1018 addr = (struct sockaddr *)&sockin;
1019 #ifdef SUPPORT_IP6
1020 } else if (have_ipv6 () && (res->ai_family == AF_INET6)) {
1021 if (res->ai_addrlen > sizeof(sockin6)) {
1022 __xmlIOErr(XML_FROM_HTTP, 0, "address size mismatch\n");
1023 freeaddrinfo (result);
1024 return (-1);
1025 }
1026 memcpy (&sockin6, res->ai_addr, res->ai_addrlen);
1027 sockin6.sin6_port = htons (port);
1028 addr = (struct sockaddr *)&sockin6;
1029 #endif
1030 } else
1031 continue; /* for */
1032
1033 s = xmlNanoHTTPConnectAttempt (addr);
1034 if (s != -1) {
1035 freeaddrinfo (result);
1036 return (s);
1037 }
1038 }
1039
1040 if (result)
1041 freeaddrinfo (result);
1042 }
1043 #endif
1044 #if defined(HAVE_GETADDRINFO) && defined(SUPPORT_IP6) && !defined(_WIN32)
1045 else
1046 #endif
1047 #if !defined(HAVE_GETADDRINFO) || !defined(_WIN32)
1048 {
1049 h = gethostbyname (host);
1050 if (h == NULL) {
1051
1052 /*
1053 * Okay, I got fed up by the non-portability of this error message
1054 * extraction code. it work on Linux, if it work on your platform
1055 * and one want to enable it, send me the defined(foobar) needed
1056 */
1057 #if defined(HAVE_NETDB_H) && defined(HOST_NOT_FOUND) && defined(linux)
1058 const char *h_err_txt = "";
1059
1060 switch (h_errno) {
1061 case HOST_NOT_FOUND:
1062 h_err_txt = "Authoritive host not found";
1063 break;
1064
1065 case TRY_AGAIN:
1066 h_err_txt =
1067 "Non-authoritive host not found or server failure.";
1068 break;
1069
1070 case NO_RECOVERY:
1071 h_err_txt =
1072 "Non-recoverable errors: FORMERR, REFUSED, or NOTIMP.";
1073 break;
1074
1075 case NO_ADDRESS:
1076 h_err_txt =
1077 "Valid name, no data record of requested type.";
1078 break;
1079
1080 default:
1081 h_err_txt = "No error text defined.";
1082 break;
1083 }
1084 __xmlIOErr(XML_FROM_HTTP, 0, h_err_txt);
1085 #else
1086 __xmlIOErr(XML_FROM_HTTP, 0, "Failed to resolve host");
1087 #endif
1088 return (-1);
1089 }
1090
1091 for (i = 0; h->h_addr_list[i]; i++) {
1092 if (h->h_addrtype == AF_INET) {
1093 /* A records (IPv4) */
1094 if ((unsigned int) h->h_length > sizeof(ia)) {
1095 __xmlIOErr(XML_FROM_HTTP, 0, "address size mismatch\n");
1096 return (-1);
1097 }
1098 memcpy (&ia, h->h_addr_list[i], h->h_length);
1099 sockin.sin_family = h->h_addrtype;
1100 sockin.sin_addr = ia;
1101 sockin.sin_port = (u_short)htons ((unsigned short)port);
1102 addr = (struct sockaddr *) &sockin;
1103 #ifdef SUPPORT_IP6
1104 } else if (have_ipv6 () && (h->h_addrtype == AF_INET6)) {
1105 /* AAAA records (IPv6) */
1106 if ((unsigned int) h->h_length > sizeof(ia6)) {
1107 __xmlIOErr(XML_FROM_HTTP, 0, "address size mismatch\n");
1108 return (-1);
1109 }
1110 memcpy (&ia6, h->h_addr_list[i], h->h_length);
1111 sockin6.sin6_family = h->h_addrtype;
1112 sockin6.sin6_addr = ia6;
1113 sockin6.sin6_port = htons (port);
1114 addr = (struct sockaddr *) &sockin6;
1115 #endif
1116 } else
1117 break; /* for */
1118
1119 s = xmlNanoHTTPConnectAttempt (addr);
1120 if (s != -1)
1121 return (s);
1122 }
1123 }
1124 #endif
1125
1126 #ifdef DEBUG_HTTP
1127 xmlGenericError(xmlGenericErrorContext,
1128 "xmlNanoHTTPConnectHost: unable to connect to '%s'.\n",
1129 host);
1130 #endif
1131 return (-1);
1132 }
1133
1134
1135 /**
1136 * xmlNanoHTTPOpen:
1137 * @URL: The URL to load
1138 * @contentType: if available the Content-Type information will be
1139 * returned at that location
1140 *
1141 * This function try to open a connection to the indicated resource
1142 * via HTTP GET.
1143 *
1144 * Returns NULL in case of failure, otherwise a request handler.
1145 * The contentType, if provided must be freed by the caller
1146 */
1147
1148 void*
xmlNanoHTTPOpen(const char * URL,char ** contentType)1149 xmlNanoHTTPOpen(const char *URL, char **contentType) {
1150 if (contentType != NULL) *contentType = NULL;
1151 return(xmlNanoHTTPMethod(URL, NULL, NULL, contentType, NULL, 0));
1152 }
1153
1154 /**
1155 * xmlNanoHTTPOpenRedir:
1156 * @URL: The URL to load
1157 * @contentType: if available the Content-Type information will be
1158 * returned at that location
1159 * @redir: if available the redirected URL will be returned
1160 *
1161 * This function try to open a connection to the indicated resource
1162 * via HTTP GET.
1163 *
1164 * Returns NULL in case of failure, otherwise a request handler.
1165 * The contentType, if provided must be freed by the caller
1166 */
1167
1168 void*
xmlNanoHTTPOpenRedir(const char * URL,char ** contentType,char ** redir)1169 xmlNanoHTTPOpenRedir(const char *URL, char **contentType, char **redir) {
1170 if (contentType != NULL) *contentType = NULL;
1171 if (redir != NULL) *redir = NULL;
1172 return(xmlNanoHTTPMethodRedir(URL, NULL, NULL, contentType, redir, NULL,0));
1173 }
1174
1175 /**
1176 * xmlNanoHTTPRead:
1177 * @ctx: the HTTP context
1178 * @dest: a buffer
1179 * @len: the buffer length
1180 *
1181 * This function tries to read @len bytes from the existing HTTP connection
1182 * and saves them in @dest. This is a blocking call.
1183 *
1184 * Returns the number of byte read. 0 is an indication of an end of connection.
1185 * -1 indicates a parameter error.
1186 */
1187 int
xmlNanoHTTPRead(void * ctx,void * dest,int len)1188 xmlNanoHTTPRead(void *ctx, void *dest, int len) {
1189 xmlNanoHTTPCtxtPtr ctxt = (xmlNanoHTTPCtxtPtr) ctx;
1190 #ifdef HAVE_ZLIB_H
1191 int bytes_read = 0;
1192 int orig_avail_in;
1193 int z_ret;
1194 #endif
1195
1196 if (ctx == NULL) return(-1);
1197 if (dest == NULL) return(-1);
1198 if (len <= 0) return(0);
1199
1200 #ifdef HAVE_ZLIB_H
1201 if (ctxt->usesGzip == 1) {
1202 if (ctxt->strm == NULL) return(0);
1203
1204 ctxt->strm->next_out = dest;
1205 ctxt->strm->avail_out = len;
1206 ctxt->strm->avail_in = ctxt->inptr - ctxt->inrptr;
1207
1208 while (ctxt->strm->avail_out > 0 &&
1209 (ctxt->strm->avail_in > 0 || xmlNanoHTTPRecv(ctxt) > 0)) {
1210 orig_avail_in = ctxt->strm->avail_in =
1211 ctxt->inptr - ctxt->inrptr - bytes_read;
1212 ctxt->strm->next_in = BAD_CAST (ctxt->inrptr + bytes_read);
1213
1214 z_ret = inflate(ctxt->strm, Z_NO_FLUSH);
1215 bytes_read += orig_avail_in - ctxt->strm->avail_in;
1216
1217 if (z_ret != Z_OK) break;
1218 }
1219
1220 ctxt->inrptr += bytes_read;
1221 return(len - ctxt->strm->avail_out);
1222 }
1223 #endif
1224
1225 while (ctxt->inptr - ctxt->inrptr < len) {
1226 if (xmlNanoHTTPRecv(ctxt) <= 0) break;
1227 }
1228 if (ctxt->inptr - ctxt->inrptr < len)
1229 len = ctxt->inptr - ctxt->inrptr;
1230 memcpy(dest, ctxt->inrptr, len);
1231 ctxt->inrptr += len;
1232 return(len);
1233 }
1234
1235 /**
1236 * xmlNanoHTTPClose:
1237 * @ctx: the HTTP context
1238 *
1239 * This function closes an HTTP context, it ends up the connection and
1240 * free all data related to it.
1241 */
1242 void
xmlNanoHTTPClose(void * ctx)1243 xmlNanoHTTPClose(void *ctx) {
1244 xmlNanoHTTPCtxtPtr ctxt = (xmlNanoHTTPCtxtPtr) ctx;
1245
1246 if (ctx == NULL) return;
1247
1248 xmlNanoHTTPFreeCtxt(ctxt);
1249 }
1250
1251 /**
1252 * xmlNanoHTTPMethodRedir:
1253 * @URL: The URL to load
1254 * @method: the HTTP method to use
1255 * @input: the input string if any
1256 * @contentType: the Content-Type information IN and OUT
1257 * @redir: the redirected URL OUT
1258 * @headers: the extra headers
1259 * @ilen: input length
1260 *
1261 * This function try to open a connection to the indicated resource
1262 * via HTTP using the given @method, adding the given extra headers
1263 * and the input buffer for the request content.
1264 *
1265 * Returns NULL in case of failure, otherwise a request handler.
1266 * The contentType, or redir, if provided must be freed by the caller
1267 */
1268
1269 void*
xmlNanoHTTPMethodRedir(const char * URL,const char * method,const char * input,char ** contentType,char ** redir,const char * headers,int ilen)1270 xmlNanoHTTPMethodRedir(const char *URL, const char *method, const char *input,
1271 char **contentType, char **redir,
1272 const char *headers, int ilen ) {
1273 xmlNanoHTTPCtxtPtr ctxt;
1274 char *bp, *p;
1275 int blen, ret;
1276 int head;
1277 int nbRedirects = 0;
1278 char *redirURL = NULL;
1279 #ifdef DEBUG_HTTP
1280 int xmt_bytes;
1281 #endif
1282
1283 if (URL == NULL) return(NULL);
1284 if (method == NULL) method = "GET";
1285 xmlNanoHTTPInit();
1286
1287 retry:
1288 if (redirURL == NULL)
1289 ctxt = xmlNanoHTTPNewCtxt(URL);
1290 else {
1291 ctxt = xmlNanoHTTPNewCtxt(redirURL);
1292 ctxt->location = xmlMemStrdup(redirURL);
1293 }
1294
1295 if ( ctxt == NULL ) {
1296 return ( NULL );
1297 }
1298
1299 if ((ctxt->protocol == NULL) || (strcmp(ctxt->protocol, "http"))) {
1300 __xmlIOErr(XML_FROM_HTTP, XML_HTTP_URL_SYNTAX, "Not a valid HTTP URI");
1301 xmlNanoHTTPFreeCtxt(ctxt);
1302 if (redirURL != NULL) xmlFree(redirURL);
1303 return(NULL);
1304 }
1305 if (ctxt->hostname == NULL) {
1306 __xmlIOErr(XML_FROM_HTTP, XML_HTTP_UNKNOWN_HOST,
1307 "Failed to identify host in URI");
1308 xmlNanoHTTPFreeCtxt(ctxt);
1309 if (redirURL != NULL) xmlFree(redirURL);
1310 return(NULL);
1311 }
1312 if (proxy) {
1313 blen = strlen(ctxt->hostname) * 2 + 16;
1314 ret = xmlNanoHTTPConnectHost(proxy, proxyPort);
1315 }
1316 else {
1317 blen = strlen(ctxt->hostname);
1318 ret = xmlNanoHTTPConnectHost(ctxt->hostname, ctxt->port);
1319 }
1320 if (ret < 0) {
1321 xmlNanoHTTPFreeCtxt(ctxt);
1322 if (redirURL != NULL) xmlFree(redirURL);
1323 return(NULL);
1324 }
1325 ctxt->fd = ret;
1326
1327 if (input == NULL)
1328 ilen = 0;
1329 else
1330 blen += 36;
1331
1332 if (headers != NULL)
1333 blen += strlen(headers) + 2;
1334 if (contentType && *contentType)
1335 /* reserve for string plus 'Content-Type: \r\n" */
1336 blen += strlen(*contentType) + 16;
1337 if (ctxt->query != NULL)
1338 /* 1 for '?' */
1339 blen += strlen(ctxt->query) + 1;
1340 blen += strlen(method) + strlen(ctxt->path) + 24;
1341 #ifdef HAVE_ZLIB_H
1342 /* reserve for possible 'Accept-Encoding: gzip' string */
1343 blen += 23;
1344 #endif
1345 if (ctxt->port != 80) {
1346 /* reserve space for ':xxxxx', incl. potential proxy */
1347 if (proxy)
1348 blen += 12;
1349 else
1350 blen += 6;
1351 }
1352 bp = (char*)xmlMallocAtomic(blen);
1353 if ( bp == NULL ) {
1354 xmlNanoHTTPFreeCtxt( ctxt );
1355 xmlHTTPErrMemory("allocating header buffer");
1356 return ( NULL );
1357 }
1358
1359 p = bp;
1360
1361 if (proxy) {
1362 if (ctxt->port != 80) {
1363 p += snprintf( p, blen - (p - bp), "%s http://%s:%d%s",
1364 method, ctxt->hostname,
1365 ctxt->port, ctxt->path );
1366 }
1367 else
1368 p += snprintf( p, blen - (p - bp), "%s http://%s%s", method,
1369 ctxt->hostname, ctxt->path);
1370 }
1371 else
1372 p += snprintf( p, blen - (p - bp), "%s %s", method, ctxt->path);
1373
1374 if (ctxt->query != NULL)
1375 p += snprintf( p, blen - (p - bp), "?%s", ctxt->query);
1376
1377 if (ctxt->port == 80) {
1378 p += snprintf( p, blen - (p - bp), " HTTP/1.0\r\nHost: %s\r\n",
1379 ctxt->hostname);
1380 } else {
1381 p += snprintf( p, blen - (p - bp), " HTTP/1.0\r\nHost: %s:%d\r\n",
1382 ctxt->hostname, ctxt->port);
1383 }
1384
1385 #ifdef HAVE_ZLIB_H
1386 p += snprintf(p, blen - (p - bp), "Accept-Encoding: gzip\r\n");
1387 #endif
1388
1389 if (contentType != NULL && *contentType)
1390 p += snprintf(p, blen - (p - bp), "Content-Type: %s\r\n", *contentType);
1391
1392 if (headers != NULL)
1393 p += snprintf( p, blen - (p - bp), "%s", headers );
1394
1395 if (input != NULL)
1396 snprintf(p, blen - (p - bp), "Content-Length: %d\r\n\r\n", ilen );
1397 else
1398 snprintf(p, blen - (p - bp), "\r\n");
1399
1400 #ifdef DEBUG_HTTP
1401 xmlGenericError(xmlGenericErrorContext,
1402 "-> %s%s", proxy? "(Proxy) " : "", bp);
1403 if ((blen -= strlen(bp)+1) < 0)
1404 xmlGenericError(xmlGenericErrorContext,
1405 "ERROR: overflowed buffer by %d bytes\n", -blen);
1406 #endif
1407 ctxt->outptr = ctxt->out = bp;
1408 ctxt->state = XML_NANO_HTTP_WRITE;
1409 blen = strlen( ctxt->out );
1410 #ifdef DEBUG_HTTP
1411 xmt_bytes = xmlNanoHTTPSend(ctxt, ctxt->out, blen );
1412 if ( xmt_bytes != blen )
1413 xmlGenericError( xmlGenericErrorContext,
1414 "xmlNanoHTTPMethodRedir: Only %d of %d %s %s\n",
1415 xmt_bytes, blen,
1416 "bytes of HTTP headers sent to host",
1417 ctxt->hostname );
1418 #else
1419 xmlNanoHTTPSend(ctxt, ctxt->out, blen );
1420 #endif
1421
1422 if ( input != NULL ) {
1423 #ifdef DEBUG_HTTP
1424 xmt_bytes = xmlNanoHTTPSend( ctxt, input, ilen );
1425
1426 if ( xmt_bytes != ilen )
1427 xmlGenericError( xmlGenericErrorContext,
1428 "xmlNanoHTTPMethodRedir: Only %d of %d %s %s\n",
1429 xmt_bytes, ilen,
1430 "bytes of HTTP content sent to host",
1431 ctxt->hostname );
1432 #else
1433 xmlNanoHTTPSend( ctxt, input, ilen );
1434 #endif
1435 }
1436
1437 ctxt->state = XML_NANO_HTTP_READ;
1438 head = 1;
1439
1440 while ((p = xmlNanoHTTPReadLine(ctxt)) != NULL) {
1441 if (head && (*p == 0)) {
1442 head = 0;
1443 ctxt->content = ctxt->inrptr;
1444 xmlFree(p);
1445 break;
1446 }
1447 xmlNanoHTTPScanAnswer(ctxt, p);
1448
1449 #ifdef DEBUG_HTTP
1450 xmlGenericError(xmlGenericErrorContext, "<- %s\n", p);
1451 #endif
1452 xmlFree(p);
1453 }
1454
1455 if ((ctxt->location != NULL) && (ctxt->returnValue >= 300) &&
1456 (ctxt->returnValue < 400)) {
1457 #ifdef DEBUG_HTTP
1458 xmlGenericError(xmlGenericErrorContext,
1459 "\nRedirect to: %s\n", ctxt->location);
1460 #endif
1461 while ( xmlNanoHTTPRecv(ctxt) > 0 ) ;
1462 if (nbRedirects < XML_NANO_HTTP_MAX_REDIR) {
1463 nbRedirects++;
1464 if (redirURL != NULL)
1465 xmlFree(redirURL);
1466 redirURL = xmlMemStrdup(ctxt->location);
1467 xmlNanoHTTPFreeCtxt(ctxt);
1468 goto retry;
1469 }
1470 xmlNanoHTTPFreeCtxt(ctxt);
1471 if (redirURL != NULL) xmlFree(redirURL);
1472 #ifdef DEBUG_HTTP
1473 xmlGenericError(xmlGenericErrorContext,
1474 "xmlNanoHTTPMethodRedir: Too many redirects, aborting ...\n");
1475 #endif
1476 return(NULL);
1477 }
1478
1479 if (contentType != NULL) {
1480 if (ctxt->contentType != NULL)
1481 *contentType = xmlMemStrdup(ctxt->contentType);
1482 else
1483 *contentType = NULL;
1484 }
1485
1486 if ((redir != NULL) && (redirURL != NULL)) {
1487 *redir = redirURL;
1488 } else {
1489 if (redirURL != NULL)
1490 xmlFree(redirURL);
1491 if (redir != NULL)
1492 *redir = NULL;
1493 }
1494
1495 #ifdef DEBUG_HTTP
1496 if (ctxt->contentType != NULL)
1497 xmlGenericError(xmlGenericErrorContext,
1498 "\nCode %d, content-type '%s'\n\n",
1499 ctxt->returnValue, ctxt->contentType);
1500 else
1501 xmlGenericError(xmlGenericErrorContext,
1502 "\nCode %d, no content-type\n\n",
1503 ctxt->returnValue);
1504 #endif
1505
1506 return((void *) ctxt);
1507 }
1508
1509 /**
1510 * xmlNanoHTTPMethod:
1511 * @URL: The URL to load
1512 * @method: the HTTP method to use
1513 * @input: the input string if any
1514 * @contentType: the Content-Type information IN and OUT
1515 * @headers: the extra headers
1516 * @ilen: input length
1517 *
1518 * This function try to open a connection to the indicated resource
1519 * via HTTP using the given @method, adding the given extra headers
1520 * and the input buffer for the request content.
1521 *
1522 * Returns NULL in case of failure, otherwise a request handler.
1523 * The contentType, if provided must be freed by the caller
1524 */
1525
1526 void*
xmlNanoHTTPMethod(const char * URL,const char * method,const char * input,char ** contentType,const char * headers,int ilen)1527 xmlNanoHTTPMethod(const char *URL, const char *method, const char *input,
1528 char **contentType, const char *headers, int ilen) {
1529 return(xmlNanoHTTPMethodRedir(URL, method, input, contentType,
1530 NULL, headers, ilen));
1531 }
1532
1533 /**
1534 * xmlNanoHTTPFetch:
1535 * @URL: The URL to load
1536 * @filename: the filename where the content should be saved
1537 * @contentType: if available the Content-Type information will be
1538 * returned at that location
1539 *
1540 * This function try to fetch the indicated resource via HTTP GET
1541 * and save it's content in the file.
1542 *
1543 * Returns -1 in case of failure, 0 incase of success. The contentType,
1544 * if provided must be freed by the caller
1545 */
1546 int
xmlNanoHTTPFetch(const char * URL,const char * filename,char ** contentType)1547 xmlNanoHTTPFetch(const char *URL, const char *filename, char **contentType) {
1548 void *ctxt = NULL;
1549 char *buf = NULL;
1550 int fd;
1551 int len;
1552
1553 if (filename == NULL) return(-1);
1554 ctxt = xmlNanoHTTPOpen(URL, contentType);
1555 if (ctxt == NULL) return(-1);
1556
1557 if (!strcmp(filename, "-"))
1558 fd = 0;
1559 else {
1560 fd = open(filename, O_CREAT | O_WRONLY, 00644);
1561 if (fd < 0) {
1562 xmlNanoHTTPClose(ctxt);
1563 if ((contentType != NULL) && (*contentType != NULL)) {
1564 xmlFree(*contentType);
1565 *contentType = NULL;
1566 }
1567 return(-1);
1568 }
1569 }
1570
1571 xmlNanoHTTPFetchContent( ctxt, &buf, &len );
1572 if ( len > 0 ) {
1573 write(fd, buf, len);
1574 }
1575
1576 xmlNanoHTTPClose(ctxt);
1577 close(fd);
1578 return(0);
1579 }
1580
1581 #ifdef LIBXML_OUTPUT_ENABLED
1582 /**
1583 * xmlNanoHTTPSave:
1584 * @ctxt: the HTTP context
1585 * @filename: the filename where the content should be saved
1586 *
1587 * This function saves the output of the HTTP transaction to a file
1588 * It closes and free the context at the end
1589 *
1590 * Returns -1 in case of failure, 0 incase of success.
1591 */
1592 int
xmlNanoHTTPSave(void * ctxt,const char * filename)1593 xmlNanoHTTPSave(void *ctxt, const char *filename) {
1594 char *buf = NULL;
1595 int fd;
1596 int len;
1597
1598 if ((ctxt == NULL) || (filename == NULL)) return(-1);
1599
1600 if (!strcmp(filename, "-"))
1601 fd = 0;
1602 else {
1603 fd = open(filename, O_CREAT | O_WRONLY, 0666);
1604 if (fd < 0) {
1605 xmlNanoHTTPClose(ctxt);
1606 return(-1);
1607 }
1608 }
1609
1610 xmlNanoHTTPFetchContent( ctxt, &buf, &len );
1611 if ( len > 0 ) {
1612 write(fd, buf, len);
1613 }
1614
1615 xmlNanoHTTPClose(ctxt);
1616 close(fd);
1617 return(0);
1618 }
1619 #endif /* LIBXML_OUTPUT_ENABLED */
1620
1621 /**
1622 * xmlNanoHTTPReturnCode:
1623 * @ctx: the HTTP context
1624 *
1625 * Get the latest HTTP return code received
1626 *
1627 * Returns the HTTP return code for the request.
1628 */
1629 int
xmlNanoHTTPReturnCode(void * ctx)1630 xmlNanoHTTPReturnCode(void *ctx) {
1631 xmlNanoHTTPCtxtPtr ctxt = (xmlNanoHTTPCtxtPtr) ctx;
1632
1633 if (ctxt == NULL) return(-1);
1634
1635 return(ctxt->returnValue);
1636 }
1637
1638 /**
1639 * xmlNanoHTTPAuthHeader:
1640 * @ctx: the HTTP context
1641 *
1642 * Get the authentication header of an HTTP context
1643 *
1644 * Returns the stashed value of the WWW-Authenticate or Proxy-Authenticate
1645 * header.
1646 */
1647 const char *
xmlNanoHTTPAuthHeader(void * ctx)1648 xmlNanoHTTPAuthHeader(void *ctx) {
1649 xmlNanoHTTPCtxtPtr ctxt = (xmlNanoHTTPCtxtPtr) ctx;
1650
1651 if (ctxt == NULL) return(NULL);
1652
1653 return(ctxt->authHeader);
1654 }
1655
1656 /**
1657 * xmlNanoHTTPContentLength:
1658 * @ctx: the HTTP context
1659 *
1660 * Provides the specified content length from the HTTP header.
1661 *
1662 * Return the specified content length from the HTTP header. Note that
1663 * a value of -1 indicates that the content length element was not included in
1664 * the response header.
1665 */
1666 int
xmlNanoHTTPContentLength(void * ctx)1667 xmlNanoHTTPContentLength( void * ctx ) {
1668 xmlNanoHTTPCtxtPtr ctxt = (xmlNanoHTTPCtxtPtr)ctx;
1669
1670 return ( ( ctxt == NULL ) ? -1 : ctxt->ContentLength );
1671 }
1672
1673 /**
1674 * xmlNanoHTTPRedir:
1675 * @ctx: the HTTP context
1676 *
1677 * Provides the specified redirection URL if available from the HTTP header.
1678 *
1679 * Return the specified redirection URL or NULL if not redirected.
1680 */
1681 const char *
xmlNanoHTTPRedir(void * ctx)1682 xmlNanoHTTPRedir( void * ctx ) {
1683 xmlNanoHTTPCtxtPtr ctxt = (xmlNanoHTTPCtxtPtr)ctx;
1684
1685 return ( ( ctxt == NULL ) ? NULL : ctxt->location );
1686 }
1687
1688 /**
1689 * xmlNanoHTTPEncoding:
1690 * @ctx: the HTTP context
1691 *
1692 * Provides the specified encoding if specified in the HTTP headers.
1693 *
1694 * Return the specified encoding or NULL if not available
1695 */
1696 const char *
xmlNanoHTTPEncoding(void * ctx)1697 xmlNanoHTTPEncoding( void * ctx ) {
1698 xmlNanoHTTPCtxtPtr ctxt = (xmlNanoHTTPCtxtPtr)ctx;
1699
1700 return ( ( ctxt == NULL ) ? NULL : ctxt->encoding );
1701 }
1702
1703 /**
1704 * xmlNanoHTTPMimeType:
1705 * @ctx: the HTTP context
1706 *
1707 * Provides the specified Mime-Type if specified in the HTTP headers.
1708 *
1709 * Return the specified Mime-Type or NULL if not available
1710 */
1711 const char *
xmlNanoHTTPMimeType(void * ctx)1712 xmlNanoHTTPMimeType( void * ctx ) {
1713 xmlNanoHTTPCtxtPtr ctxt = (xmlNanoHTTPCtxtPtr)ctx;
1714
1715 return ( ( ctxt == NULL ) ? NULL : ctxt->mimeType );
1716 }
1717
1718 /**
1719 * xmlNanoHTTPFetchContent:
1720 * @ctx: the HTTP context
1721 * @ptr: pointer to set to the content buffer.
1722 * @len: integer pointer to hold the length of the content
1723 *
1724 * Check if all the content was read
1725 *
1726 * Returns 0 if all the content was read and available, returns
1727 * -1 if received content length was less than specified or an error
1728 * occurred.
1729 */
1730 static int
xmlNanoHTTPFetchContent(void * ctx,char ** ptr,int * len)1731 xmlNanoHTTPFetchContent( void * ctx, char ** ptr, int * len ) {
1732 xmlNanoHTTPCtxtPtr ctxt = (xmlNanoHTTPCtxtPtr)ctx;
1733
1734 int rc = 0;
1735 int cur_lgth;
1736 int rcvd_lgth;
1737 int dummy_int;
1738 char * dummy_ptr = NULL;
1739
1740 /* Dummy up return input parameters if not provided */
1741
1742 if ( len == NULL )
1743 len = &dummy_int;
1744
1745 if ( ptr == NULL )
1746 ptr = &dummy_ptr;
1747
1748 /* But can't work without the context pointer */
1749
1750 if ( ( ctxt == NULL ) || ( ctxt->content == NULL ) ) {
1751 *len = 0;
1752 *ptr = NULL;
1753 return ( -1 );
1754 }
1755
1756 rcvd_lgth = ctxt->inptr - ctxt->content;
1757
1758 while ( (cur_lgth = xmlNanoHTTPRecv( ctxt )) > 0 ) {
1759
1760 rcvd_lgth += cur_lgth;
1761 if ( (ctxt->ContentLength > 0) && (rcvd_lgth >= ctxt->ContentLength) )
1762 break;
1763 }
1764
1765 *ptr = ctxt->content;
1766 *len = rcvd_lgth;
1767
1768 if ( ( ctxt->ContentLength > 0 ) && ( rcvd_lgth < ctxt->ContentLength ) )
1769 rc = -1;
1770 else if ( rcvd_lgth == 0 )
1771 rc = -1;
1772
1773 return ( rc );
1774 }
1775
1776 #ifdef STANDALONE
main(int argc,char ** argv)1777 int main(int argc, char **argv) {
1778 char *contentType = NULL;
1779
1780 if (argv[1] != NULL) {
1781 if (argv[2] != NULL)
1782 xmlNanoHTTPFetch(argv[1], argv[2], &contentType);
1783 else
1784 xmlNanoHTTPFetch(argv[1], "-", &contentType);
1785 if (contentType != NULL) xmlFree(contentType);
1786 } else {
1787 xmlGenericError(xmlGenericErrorContext,
1788 "%s: minimal HTTP GET implementation\n", argv[0]);
1789 xmlGenericError(xmlGenericErrorContext,
1790 "\tusage %s [ URL [ filename ] ]\n", argv[0]);
1791 }
1792 xmlNanoHTTPCleanup();
1793 xmlMemoryDump();
1794 return(0);
1795 }
1796 #endif /* STANDALONE */
1797 #else /* !LIBXML_HTTP_ENABLED */
1798 #ifdef STANDALONE
1799 #include <stdio.h>
main(int argc,char ** argv)1800 int main(int argc, char **argv) {
1801 xmlGenericError(xmlGenericErrorContext,
1802 "%s : HTTP support not compiled in\n", argv[0]);
1803 return(0);
1804 }
1805 #endif /* STANDALONE */
1806 #endif /* LIBXML_HTTP_ENABLED */
1807 #define bottom_nanohttp
1808 #include "elfgcchack.h"
1809