1 /*
2 +----------------------------------------------------------------------+
3 | PHP Version 7 |
4 +----------------------------------------------------------------------+
5 | Copyright (c) The PHP Group |
6 +----------------------------------------------------------------------+
7 | This source file is subject to version 3.01 of the PHP license, |
8 | that is bundled with this package in the file LICENSE, and is |
9 | available through the world-wide-web at the following url: |
10 | http://www.php.net/license/3_01.txt |
11 | If you did not receive a copy of the PHP license and are unable to |
12 | obtain it through the world-wide-web, please send a note to |
13 | license@php.net so we can mail you a copy immediately. |
14 +----------------------------------------------------------------------+
15 | Authors: Rasmus Lerdorf <rasmus@php.net> |
16 | Jim Winstead <jimw@php.net> |
17 | Hartmut Holzgraefe <hholzgra@php.net> |
18 | Wez Furlong <wez@thebrainroom.com> |
19 | Sara Golemon <pollita@php.net> |
20 +----------------------------------------------------------------------+
21 */
22
23 #include "php.h"
24 #include "php_globals.h"
25 #include "php_streams.h"
26 #include "php_network.h"
27 #include "php_ini.h"
28 #include "ext/standard/basic_functions.h"
29 #include "zend_smart_str.h"
30
31 #include <stdio.h>
32 #include <stdlib.h>
33 #include <errno.h>
34 #include <sys/types.h>
35 #include <sys/stat.h>
36 #include <fcntl.h>
37
38 #ifdef PHP_WIN32
39 #define O_RDONLY _O_RDONLY
40 #include "win32/param.h"
41 #else
42 #include <sys/param.h>
43 #endif
44
45 #include "php_standard.h"
46
47 #include <sys/types.h>
48 #if HAVE_SYS_SOCKET_H
49 #include <sys/socket.h>
50 #endif
51
52 #ifdef PHP_WIN32
53 #include <winsock2.h>
54 #else
55 #include <netinet/in.h>
56 #include <netdb.h>
57 #if HAVE_ARPA_INET_H
58 #include <arpa/inet.h>
59 #endif
60 #endif
61
62 #if defined(PHP_WIN32) || defined(__riscos__)
63 #undef AF_UNIX
64 #endif
65
66 #if defined(AF_UNIX)
67 #include <sys/un.h>
68 #endif
69
70 #include "php_fopen_wrappers.h"
71
72 #define HTTP_HEADER_BLOCK_SIZE 1024
73 #define PHP_URL_REDIRECT_MAX 20
74 #define HTTP_HEADER_USER_AGENT 1
75 #define HTTP_HEADER_HOST 2
76 #define HTTP_HEADER_AUTH 4
77 #define HTTP_HEADER_FROM 8
78 #define HTTP_HEADER_CONTENT_LENGTH 16
79 #define HTTP_HEADER_TYPE 32
80 #define HTTP_HEADER_CONNECTION 64
81
82 #define HTTP_WRAPPER_HEADER_INIT 1
83 #define HTTP_WRAPPER_REDIRECTED 2
84
strip_header(char * header_bag,char * lc_header_bag,const char * lc_header_name)85 static inline void strip_header(char *header_bag, char *lc_header_bag,
86 const char *lc_header_name)
87 {
88 char *lc_header_start = strstr(lc_header_bag, lc_header_name);
89 if (lc_header_start
90 && (lc_header_start == lc_header_bag || *(lc_header_start-1) == '\n')
91 ) {
92 char *header_start = header_bag + (lc_header_start - lc_header_bag);
93 char *lc_eol = strchr(lc_header_start, '\n');
94
95 if (lc_eol) {
96 char *eol = header_start + (lc_eol - lc_header_start);
97 size_t eollen = strlen(lc_eol);
98
99 memmove(lc_header_start, lc_eol+1, eollen);
100 memmove(header_start, eol+1, eollen);
101 } else {
102 *lc_header_start = '\0';
103 *header_start = '\0';
104 }
105 }
106 }
107
check_has_header(const char * headers,const char * header)108 static zend_bool check_has_header(const char *headers, const char *header) {
109 const char *s = headers;
110 while ((s = strstr(s, header))) {
111 if (s == headers || *(s-1) == '\n') {
112 return 1;
113 }
114 s++;
115 }
116 return 0;
117 }
118
php_stream_url_wrap_http_ex(php_stream_wrapper * wrapper,const char * path,const char * mode,int options,zend_string ** opened_path,php_stream_context * context,int redirect_max,int flags,zval * response_header STREAMS_DC)119 static php_stream *php_stream_url_wrap_http_ex(php_stream_wrapper *wrapper,
120 const char *path, const char *mode, int options, zend_string **opened_path,
121 php_stream_context *context, int redirect_max, int flags,
122 zval *response_header STREAMS_DC) /* {{{ */
123 {
124 php_stream *stream = NULL;
125 php_url *resource = NULL;
126 int use_ssl;
127 int use_proxy = 0;
128 zend_string *tmp = NULL;
129 char *ua_str = NULL;
130 zval *ua_zval = NULL, *tmpzval = NULL, ssl_proxy_peer_name;
131 char location[HTTP_HEADER_BLOCK_SIZE];
132 int reqok = 0;
133 char *http_header_line = NULL;
134 char tmp_line[128];
135 size_t chunk_size = 0, file_size = 0;
136 int eol_detect = 0;
137 char *transport_string;
138 zend_string *errstr = NULL;
139 size_t transport_len;
140 int have_header = 0;
141 zend_bool request_fulluri = 0, ignore_errors = 0;
142 struct timeval timeout;
143 char *user_headers = NULL;
144 int header_init = ((flags & HTTP_WRAPPER_HEADER_INIT) != 0);
145 int redirected = ((flags & HTTP_WRAPPER_REDIRECTED) != 0);
146 zend_bool follow_location = 1;
147 php_stream_filter *transfer_encoding = NULL;
148 int response_code;
149 smart_str req_buf = {0};
150 zend_bool custom_request_method;
151
152 tmp_line[0] = '\0';
153
154 if (redirect_max < 1) {
155 php_stream_wrapper_log_error(wrapper, options, "Redirection limit reached, aborting");
156 return NULL;
157 }
158
159 resource = php_url_parse(path);
160 if (resource == NULL) {
161 return NULL;
162 }
163
164 if (!zend_string_equals_literal_ci(resource->scheme, "http") &&
165 !zend_string_equals_literal_ci(resource->scheme, "https")) {
166 if (!context ||
167 (tmpzval = php_stream_context_get_option(context, wrapper->wops->label, "proxy")) == NULL ||
168 Z_TYPE_P(tmpzval) != IS_STRING ||
169 Z_STRLEN_P(tmpzval) == 0) {
170 php_url_free(resource);
171 return php_stream_open_wrapper_ex(path, mode, REPORT_ERRORS, NULL, context);
172 }
173 /* Called from a non-http wrapper with http proxying requested (i.e. ftp) */
174 request_fulluri = 1;
175 use_ssl = 0;
176 use_proxy = 1;
177
178 transport_len = Z_STRLEN_P(tmpzval);
179 transport_string = estrndup(Z_STRVAL_P(tmpzval), Z_STRLEN_P(tmpzval));
180 } else {
181 /* Normal http request (possibly with proxy) */
182
183 if (strpbrk(mode, "awx+")) {
184 php_stream_wrapper_log_error(wrapper, options, "HTTP wrapper does not support writeable connections");
185 php_url_free(resource);
186 return NULL;
187 }
188
189 use_ssl = resource->scheme && (ZSTR_LEN(resource->scheme) > 4) && ZSTR_VAL(resource->scheme)[4] == 's';
190 /* choose default ports */
191 if (use_ssl && resource->port == 0)
192 resource->port = 443;
193 else if (resource->port == 0)
194 resource->port = 80;
195
196 if (context &&
197 (tmpzval = php_stream_context_get_option(context, wrapper->wops->label, "proxy")) != NULL &&
198 Z_TYPE_P(tmpzval) == IS_STRING &&
199 Z_STRLEN_P(tmpzval) > 0) {
200 use_proxy = 1;
201 transport_len = Z_STRLEN_P(tmpzval);
202 transport_string = estrndup(Z_STRVAL_P(tmpzval), Z_STRLEN_P(tmpzval));
203 } else {
204 transport_len = spprintf(&transport_string, 0, "%s://%s:%d", use_ssl ? "ssl" : "tcp", ZSTR_VAL(resource->host), resource->port);
205 }
206 }
207
208 if (context && (tmpzval = php_stream_context_get_option(context, wrapper->wops->label, "timeout")) != NULL) {
209 double d = zval_get_double(tmpzval);
210 #ifndef PHP_WIN32
211 timeout.tv_sec = (time_t) d;
212 timeout.tv_usec = (size_t) ((d - timeout.tv_sec) * 1000000);
213 #else
214 timeout.tv_sec = (long) d;
215 timeout.tv_usec = (long) ((d - timeout.tv_sec) * 1000000);
216 #endif
217 } else {
218 #ifndef PHP_WIN32
219 timeout.tv_sec = FG(default_socket_timeout);
220 #else
221 timeout.tv_sec = (long)FG(default_socket_timeout);
222 #endif
223 timeout.tv_usec = 0;
224 }
225
226 stream = php_stream_xport_create(transport_string, transport_len, options,
227 STREAM_XPORT_CLIENT | STREAM_XPORT_CONNECT,
228 NULL, &timeout, context, &errstr, NULL);
229
230 if (stream) {
231 php_stream_set_option(stream, PHP_STREAM_OPTION_READ_TIMEOUT, 0, &timeout);
232 }
233
234 if (errstr) {
235 php_stream_wrapper_log_error(wrapper, options, "%s", ZSTR_VAL(errstr));
236 zend_string_release_ex(errstr, 0);
237 errstr = NULL;
238 }
239
240 efree(transport_string);
241
242 if (stream && use_proxy && use_ssl) {
243 smart_str header = {0};
244
245 /* Set peer_name or name verification will try to use the proxy server name */
246 if (!context || (tmpzval = php_stream_context_get_option(context, "ssl", "peer_name")) == NULL) {
247 ZVAL_STR_COPY(&ssl_proxy_peer_name, resource->host);
248 php_stream_context_set_option(PHP_STREAM_CONTEXT(stream), "ssl", "peer_name", &ssl_proxy_peer_name);
249 zval_ptr_dtor(&ssl_proxy_peer_name);
250 }
251
252 smart_str_appendl(&header, "CONNECT ", sizeof("CONNECT ")-1);
253 smart_str_appends(&header, ZSTR_VAL(resource->host));
254 smart_str_appendc(&header, ':');
255 smart_str_append_unsigned(&header, resource->port);
256 smart_str_appendl(&header, " HTTP/1.0\r\n", sizeof(" HTTP/1.0\r\n")-1);
257
258 /* check if we have Proxy-Authorization header */
259 if (context && (tmpzval = php_stream_context_get_option(context, "http", "header")) != NULL) {
260 char *s, *p;
261
262 if (Z_TYPE_P(tmpzval) == IS_ARRAY) {
263 zval *tmpheader = NULL;
264
265 ZEND_HASH_FOREACH_VAL(Z_ARRVAL_P(tmpzval), tmpheader) {
266 if (Z_TYPE_P(tmpheader) == IS_STRING) {
267 s = Z_STRVAL_P(tmpheader);
268 do {
269 while (*s == ' ' || *s == '\t') s++;
270 p = s;
271 while (*p != 0 && *p != ':' && *p != '\r' && *p !='\n') p++;
272 if (*p == ':') {
273 p++;
274 if (p - s == sizeof("Proxy-Authorization:") - 1 &&
275 zend_binary_strcasecmp(s, sizeof("Proxy-Authorization:") - 1,
276 "Proxy-Authorization:", sizeof("Proxy-Authorization:") - 1) == 0) {
277 while (*p != 0 && *p != '\r' && *p !='\n') p++;
278 smart_str_appendl(&header, s, p - s);
279 smart_str_appendl(&header, "\r\n", sizeof("\r\n")-1);
280 goto finish;
281 } else {
282 while (*p != 0 && *p != '\r' && *p !='\n') p++;
283 }
284 }
285 s = p;
286 while (*s == '\r' || *s == '\n') s++;
287 } while (*s != 0);
288 }
289 } ZEND_HASH_FOREACH_END();
290 } else if (Z_TYPE_P(tmpzval) == IS_STRING && Z_STRLEN_P(tmpzval)) {
291 s = Z_STRVAL_P(tmpzval);
292 do {
293 while (*s == ' ' || *s == '\t') s++;
294 p = s;
295 while (*p != 0 && *p != ':' && *p != '\r' && *p !='\n') p++;
296 if (*p == ':') {
297 p++;
298 if (p - s == sizeof("Proxy-Authorization:") - 1 &&
299 zend_binary_strcasecmp(s, sizeof("Proxy-Authorization:") - 1,
300 "Proxy-Authorization:", sizeof("Proxy-Authorization:") - 1) == 0) {
301 while (*p != 0 && *p != '\r' && *p !='\n') p++;
302 smart_str_appendl(&header, s, p - s);
303 smart_str_appendl(&header, "\r\n", sizeof("\r\n")-1);
304 goto finish;
305 } else {
306 while (*p != 0 && *p != '\r' && *p !='\n') p++;
307 }
308 }
309 s = p;
310 while (*s == '\r' || *s == '\n') s++;
311 } while (*s != 0);
312 }
313 }
314 finish:
315 smart_str_appendl(&header, "\r\n", sizeof("\r\n")-1);
316
317 if (php_stream_write(stream, ZSTR_VAL(header.s), ZSTR_LEN(header.s)) != ZSTR_LEN(header.s)) {
318 php_stream_wrapper_log_error(wrapper, options, "Cannot connect to HTTPS server through proxy");
319 php_stream_close(stream);
320 stream = NULL;
321 }
322 smart_str_free(&header);
323
324 if (stream) {
325 char header_line[HTTP_HEADER_BLOCK_SIZE];
326
327 /* get response header */
328 while (php_stream_gets(stream, header_line, HTTP_HEADER_BLOCK_SIZE-1) != NULL) {
329 if (header_line[0] == '\n' ||
330 header_line[0] == '\r' ||
331 header_line[0] == '\0') {
332 break;
333 }
334 }
335 }
336
337 /* enable SSL transport layer */
338 if (stream) {
339 if (php_stream_xport_crypto_setup(stream, STREAM_CRYPTO_METHOD_SSLv23_CLIENT, NULL) < 0 ||
340 php_stream_xport_crypto_enable(stream, 1) < 0) {
341 php_stream_wrapper_log_error(wrapper, options, "Cannot connect to HTTPS server through proxy");
342 php_stream_close(stream);
343 stream = NULL;
344 }
345 }
346 }
347
348 if (stream == NULL)
349 goto out;
350
351 /* avoid buffering issues while reading header */
352 if (options & STREAM_WILL_CAST)
353 chunk_size = php_stream_set_chunk_size(stream, 1);
354
355 /* avoid problems with auto-detecting when reading the headers -> the headers
356 * are always in canonical \r\n format */
357 eol_detect = stream->flags & (PHP_STREAM_FLAG_DETECT_EOL | PHP_STREAM_FLAG_EOL_MAC);
358 stream->flags &= ~(PHP_STREAM_FLAG_DETECT_EOL | PHP_STREAM_FLAG_EOL_MAC);
359
360 php_stream_context_set(stream, context);
361
362 php_stream_notify_info(context, PHP_STREAM_NOTIFY_CONNECT, NULL, 0);
363
364 if (header_init && context && (tmpzval = php_stream_context_get_option(context, "http", "max_redirects")) != NULL) {
365 redirect_max = (int)zval_get_long(tmpzval);
366 }
367
368 custom_request_method = 0;
369 if (context && (tmpzval = php_stream_context_get_option(context, "http", "method")) != NULL) {
370 if (Z_TYPE_P(tmpzval) == IS_STRING && Z_STRLEN_P(tmpzval) > 0) {
371 /* As per the RFC, automatically redirected requests MUST NOT use other methods than
372 * GET and HEAD unless it can be confirmed by the user */
373 if (!redirected
374 || (Z_STRLEN_P(tmpzval) == 3 && memcmp("GET", Z_STRVAL_P(tmpzval), 3) == 0)
375 || (Z_STRLEN_P(tmpzval) == 4 && memcmp("HEAD",Z_STRVAL_P(tmpzval), 4) == 0)
376 ) {
377 custom_request_method = 1;
378 smart_str_append(&req_buf, Z_STR_P(tmpzval));
379 smart_str_appendc(&req_buf, ' ');
380 }
381 }
382 }
383
384 if (!custom_request_method) {
385 smart_str_appends(&req_buf, "GET ");
386 }
387
388 /* Should we send the entire path in the request line, default to no. */
389 if (!request_fulluri && context &&
390 (tmpzval = php_stream_context_get_option(context, "http", "request_fulluri")) != NULL) {
391 request_fulluri = zend_is_true(tmpzval);
392 }
393
394 if (request_fulluri) {
395 /* Ask for everything */
396 smart_str_appends(&req_buf, path);
397 } else {
398 /* Send the traditional /path/to/file?query_string */
399
400 /* file */
401 if (resource->path && ZSTR_LEN(resource->path)) {
402 smart_str_appends(&req_buf, ZSTR_VAL(resource->path));
403 } else {
404 smart_str_appendc(&req_buf, '/');
405 }
406
407 /* query string */
408 if (resource->query) {
409 smart_str_appendc(&req_buf, '?');
410 smart_str_appends(&req_buf, ZSTR_VAL(resource->query));
411 }
412 }
413
414 /* protocol version we are speaking */
415 if (context && (tmpzval = php_stream_context_get_option(context, "http", "protocol_version")) != NULL) {
416 char *protocol_version;
417 spprintf(&protocol_version, 0, "%.1F", zval_get_double(tmpzval));
418
419 smart_str_appends(&req_buf, " HTTP/");
420 smart_str_appends(&req_buf, protocol_version);
421 smart_str_appends(&req_buf, "\r\n");
422 efree(protocol_version);
423 } else {
424 smart_str_appends(&req_buf, " HTTP/1.0\r\n");
425 }
426
427 if (context && (tmpzval = php_stream_context_get_option(context, "http", "header")) != NULL) {
428 tmp = NULL;
429
430 if (Z_TYPE_P(tmpzval) == IS_ARRAY) {
431 zval *tmpheader = NULL;
432 smart_str tmpstr = {0};
433
434 ZEND_HASH_FOREACH_VAL(Z_ARRVAL_P(tmpzval), tmpheader) {
435 if (Z_TYPE_P(tmpheader) == IS_STRING) {
436 smart_str_append(&tmpstr, Z_STR_P(tmpheader));
437 smart_str_appendl(&tmpstr, "\r\n", sizeof("\r\n") - 1);
438 }
439 } ZEND_HASH_FOREACH_END();
440 smart_str_0(&tmpstr);
441 /* Remove newlines and spaces from start and end. there's at least one extra \r\n at the end that needs to go. */
442 if (tmpstr.s) {
443 tmp = php_trim(tmpstr.s, NULL, 0, 3);
444 smart_str_free(&tmpstr);
445 }
446 } else if (Z_TYPE_P(tmpzval) == IS_STRING && Z_STRLEN_P(tmpzval)) {
447 /* Remove newlines and spaces from start and end php_trim will estrndup() */
448 tmp = php_trim(Z_STR_P(tmpzval), NULL, 0, 3);
449 }
450 if (tmp && ZSTR_LEN(tmp)) {
451 char *s;
452 char *t;
453
454 user_headers = estrndup(ZSTR_VAL(tmp), ZSTR_LEN(tmp));
455
456 if (ZSTR_IS_INTERNED(tmp)) {
457 tmp = zend_string_init(ZSTR_VAL(tmp), ZSTR_LEN(tmp), 0);
458 } else if (GC_REFCOUNT(tmp) > 1) {
459 GC_DELREF(tmp);
460 tmp = zend_string_init(ZSTR_VAL(tmp), ZSTR_LEN(tmp), 0);
461 }
462
463 /* Make lowercase for easy comparison against 'standard' headers */
464 php_strtolower(ZSTR_VAL(tmp), ZSTR_LEN(tmp));
465 t = ZSTR_VAL(tmp);
466
467 if (!header_init) {
468 /* strip POST headers on redirect */
469 strip_header(user_headers, t, "content-length:");
470 strip_header(user_headers, t, "content-type:");
471 }
472
473 if (check_has_header(t, "user-agent:")) {
474 have_header |= HTTP_HEADER_USER_AGENT;
475 }
476 if (check_has_header(t, "host:")) {
477 have_header |= HTTP_HEADER_HOST;
478 }
479 if (check_has_header(t, "from:")) {
480 have_header |= HTTP_HEADER_FROM;
481 }
482 if (check_has_header(t, "authorization:")) {
483 have_header |= HTTP_HEADER_AUTH;
484 }
485 if (check_has_header(t, "content-length:")) {
486 have_header |= HTTP_HEADER_CONTENT_LENGTH;
487 }
488 if (check_has_header(t, "content-type:")) {
489 have_header |= HTTP_HEADER_TYPE;
490 }
491 if (check_has_header(t, "connection:")) {
492 have_header |= HTTP_HEADER_CONNECTION;
493 }
494
495 /* remove Proxy-Authorization header */
496 if (use_proxy && use_ssl && (s = strstr(t, "proxy-authorization:")) &&
497 (s == t || *(s-1) == '\n')) {
498 char *p = s + sizeof("proxy-authorization:") - 1;
499
500 while (s > t && (*(s-1) == ' ' || *(s-1) == '\t')) s--;
501 while (*p != 0 && *p != '\r' && *p != '\n') p++;
502 while (*p == '\r' || *p == '\n') p++;
503 if (*p == 0) {
504 if (s == t) {
505 efree(user_headers);
506 user_headers = NULL;
507 } else {
508 while (s > t && (*(s-1) == '\r' || *(s-1) == '\n')) s--;
509 user_headers[s - t] = 0;
510 }
511 } else {
512 memmove(user_headers + (s - t), user_headers + (p - t), strlen(p) + 1);
513 }
514 }
515
516 }
517 if (tmp) {
518 zend_string_release_ex(tmp, 0);
519 }
520 }
521
522 /* auth header if it was specified */
523 if (((have_header & HTTP_HEADER_AUTH) == 0) && resource->user) {
524 /* make scratch large enough to hold the whole URL (over-estimate) */
525 size_t scratch_len = strlen(path) + 1;
526 char *scratch = emalloc(scratch_len);
527 zend_string *stmp;
528
529 /* decode the strings first */
530 php_url_decode(ZSTR_VAL(resource->user), ZSTR_LEN(resource->user));
531
532 strcpy(scratch, ZSTR_VAL(resource->user));
533 strcat(scratch, ":");
534
535 /* Note: password is optional! */
536 if (resource->pass) {
537 php_url_decode(ZSTR_VAL(resource->pass), ZSTR_LEN(resource->pass));
538 strcat(scratch, ZSTR_VAL(resource->pass));
539 }
540
541 stmp = php_base64_encode((unsigned char*)scratch, strlen(scratch));
542
543 smart_str_appends(&req_buf, "Authorization: Basic ");
544 smart_str_appends(&req_buf, ZSTR_VAL(stmp));
545 smart_str_appends(&req_buf, "\r\n");
546
547 php_stream_notify_info(context, PHP_STREAM_NOTIFY_AUTH_REQUIRED, NULL, 0);
548
549 zend_string_free(stmp);
550 efree(scratch);
551 }
552
553 /* if the user has configured who they are, send a From: line */
554 if (!(have_header & HTTP_HEADER_FROM) && FG(from_address)) {
555 smart_str_appends(&req_buf, "From: ");
556 smart_str_appends(&req_buf, FG(from_address));
557 smart_str_appends(&req_buf, "\r\n");
558 }
559
560 /* Send Host: header so name-based virtual hosts work */
561 if ((have_header & HTTP_HEADER_HOST) == 0) {
562 smart_str_appends(&req_buf, "Host: ");
563 smart_str_appends(&req_buf, ZSTR_VAL(resource->host));
564 if ((use_ssl && resource->port != 443 && resource->port != 0) ||
565 (!use_ssl && resource->port != 80 && resource->port != 0)) {
566 smart_str_appendc(&req_buf, ':');
567 smart_str_append_unsigned(&req_buf, resource->port);
568 }
569 smart_str_appends(&req_buf, "\r\n");
570 }
571
572 /* Send a Connection: close header to avoid hanging when the server
573 * interprets the RFC literally and establishes a keep-alive connection,
574 * unless the user specifically requests something else by specifying a
575 * Connection header in the context options. Send that header even for
576 * HTTP/1.0 to avoid issues when the server respond with a HTTP/1.1
577 * keep-alive response, which is the preferred response type. */
578 if ((have_header & HTTP_HEADER_CONNECTION) == 0) {
579 smart_str_appends(&req_buf, "Connection: close\r\n");
580 }
581
582 if (context &&
583 (ua_zval = php_stream_context_get_option(context, "http", "user_agent")) != NULL &&
584 Z_TYPE_P(ua_zval) == IS_STRING) {
585 ua_str = Z_STRVAL_P(ua_zval);
586 } else if (FG(user_agent)) {
587 ua_str = FG(user_agent);
588 }
589
590 if (((have_header & HTTP_HEADER_USER_AGENT) == 0) && ua_str) {
591 #define _UA_HEADER "User-Agent: %s\r\n"
592 char *ua;
593 size_t ua_len;
594
595 ua_len = sizeof(_UA_HEADER) + strlen(ua_str);
596
597 /* ensure the header is only sent if user_agent is not blank */
598 if (ua_len > sizeof(_UA_HEADER)) {
599 ua = emalloc(ua_len + 1);
600 if ((ua_len = slprintf(ua, ua_len, _UA_HEADER, ua_str)) > 0) {
601 ua[ua_len] = 0;
602 smart_str_appendl(&req_buf, ua, ua_len);
603 } else {
604 php_error_docref(NULL, E_WARNING, "Cannot construct User-agent header");
605 }
606 efree(ua);
607 }
608 }
609
610 if (user_headers) {
611 /* A bit weird, but some servers require that Content-Length be sent prior to Content-Type for POST
612 * see bug #44603 for details. Since Content-Type maybe part of user's headers we need to do this check first.
613 */
614 if (
615 header_init &&
616 context &&
617 !(have_header & HTTP_HEADER_CONTENT_LENGTH) &&
618 (tmpzval = php_stream_context_get_option(context, "http", "content")) != NULL &&
619 Z_TYPE_P(tmpzval) == IS_STRING && Z_STRLEN_P(tmpzval) > 0
620 ) {
621 smart_str_appends(&req_buf, "Content-Length: ");
622 smart_str_append_unsigned(&req_buf, Z_STRLEN_P(tmpzval));
623 smart_str_appends(&req_buf, "\r\n");
624 have_header |= HTTP_HEADER_CONTENT_LENGTH;
625 }
626
627 smart_str_appends(&req_buf, user_headers);
628 smart_str_appends(&req_buf, "\r\n");
629 efree(user_headers);
630 }
631
632 /* Request content, such as for POST requests */
633 if (header_init && context &&
634 (tmpzval = php_stream_context_get_option(context, "http", "content")) != NULL &&
635 Z_TYPE_P(tmpzval) == IS_STRING && Z_STRLEN_P(tmpzval) > 0) {
636 if (!(have_header & HTTP_HEADER_CONTENT_LENGTH)) {
637 smart_str_appends(&req_buf, "Content-Length: ");
638 smart_str_append_unsigned(&req_buf, Z_STRLEN_P(tmpzval));
639 smart_str_appends(&req_buf, "\r\n");
640 }
641 if (!(have_header & HTTP_HEADER_TYPE)) {
642 smart_str_appends(&req_buf, "Content-Type: application/x-www-form-urlencoded\r\n");
643 php_error_docref(NULL, E_NOTICE, "Content-type not specified assuming application/x-www-form-urlencoded");
644 }
645 smart_str_appends(&req_buf, "\r\n");
646 smart_str_appendl(&req_buf, Z_STRVAL_P(tmpzval), Z_STRLEN_P(tmpzval));
647 } else {
648 smart_str_appends(&req_buf, "\r\n");
649 }
650
651 /* send it */
652 php_stream_write(stream, ZSTR_VAL(req_buf.s), ZSTR_LEN(req_buf.s));
653
654 location[0] = '\0';
655
656 if (Z_ISUNDEF_P(response_header)) {
657 array_init(response_header);
658 }
659
660 {
661 /* get response header */
662 size_t tmp_line_len;
663 if (!php_stream_eof(stream) &&
664 php_stream_get_line(stream, tmp_line, sizeof(tmp_line) - 1, &tmp_line_len) != NULL) {
665 zval http_response;
666
667 if (tmp_line_len > 9) {
668 response_code = atoi(tmp_line + 9);
669 } else {
670 response_code = 0;
671 }
672 if (context && NULL != (tmpzval = php_stream_context_get_option(context, "http", "ignore_errors"))) {
673 ignore_errors = zend_is_true(tmpzval);
674 }
675 /* when we request only the header, don't fail even on error codes */
676 if ((options & STREAM_ONLY_GET_HEADERS) || ignore_errors) {
677 reqok = 1;
678 }
679
680 /* status codes of 1xx are "informational", and will be followed by a real response
681 * e.g "100 Continue". RFC 7231 states that unexpected 1xx status MUST be parsed,
682 * and MAY be ignored. As such, we need to skip ahead to the "real" status*/
683 if (response_code >= 100 && response_code < 200 && response_code != 101) {
684 /* consume lines until we find a line starting 'HTTP/1' */
685 while (
686 !php_stream_eof(stream)
687 && php_stream_get_line(stream, tmp_line, sizeof(tmp_line) - 1, &tmp_line_len) != NULL
688 && ( tmp_line_len < sizeof("HTTP/1") - 1 || strncasecmp(tmp_line, "HTTP/1", sizeof("HTTP/1") - 1) )
689 );
690
691 if (tmp_line_len > 9) {
692 response_code = atoi(tmp_line + 9);
693 } else {
694 response_code = 0;
695 }
696 }
697 /* all status codes in the 2xx range are defined by the specification as successful;
698 * all status codes in the 3xx range are for redirection, and so also should never
699 * fail */
700 if (response_code >= 200 && response_code < 400) {
701 reqok = 1;
702 } else {
703 switch(response_code) {
704 case 403:
705 php_stream_notify_error(context, PHP_STREAM_NOTIFY_AUTH_RESULT,
706 tmp_line, response_code);
707 break;
708 default:
709 /* safety net in the event tmp_line == NULL */
710 if (!tmp_line_len) {
711 tmp_line[0] = '\0';
712 }
713 php_stream_notify_error(context, PHP_STREAM_NOTIFY_FAILURE,
714 tmp_line, response_code);
715 }
716 }
717 if (tmp_line_len >= 1 && tmp_line[tmp_line_len - 1] == '\n') {
718 --tmp_line_len;
719 if (tmp_line_len >= 1 &&tmp_line[tmp_line_len - 1] == '\r') {
720 --tmp_line_len;
721 }
722 }
723 ZVAL_STRINGL(&http_response, tmp_line, tmp_line_len);
724 zend_hash_next_index_insert(Z_ARRVAL_P(response_header), &http_response);
725 } else {
726 php_stream_close(stream);
727 stream = NULL;
728 php_stream_wrapper_log_error(wrapper, options, "HTTP request failed!");
729 goto out;
730 }
731 }
732
733 /* read past HTTP headers */
734
735 while (!php_stream_eof(stream)) {
736 size_t http_header_line_length;
737
738 if (http_header_line != NULL) {
739 efree(http_header_line);
740 }
741 if ((http_header_line = php_stream_get_line(stream, NULL, 0, &http_header_line_length)) && *http_header_line != '\n' && *http_header_line != '\r') {
742 char *e = http_header_line + http_header_line_length - 1;
743 char *http_header_value;
744
745 while (e >= http_header_line && (*e == '\n' || *e == '\r')) {
746 e--;
747 }
748
749 /* The primary definition of an HTTP header in RFC 7230 states:
750 * > Each header field consists of a case-insensitive field name followed
751 * > by a colon (":"), optional leading whitespace, the field value, and
752 * > optional trailing whitespace. */
753
754 /* Strip trailing whitespace */
755 while (e >= http_header_line && (*e == ' ' || *e == '\t')) {
756 e--;
757 }
758
759 /* Terminate header line */
760 e++;
761 *e = '\0';
762 http_header_line_length = e - http_header_line;
763
764 http_header_value = memchr(http_header_line, ':', http_header_line_length);
765 if (http_header_value) {
766 http_header_value++; /* Skip ':' */
767
768 /* Strip leading whitespace */
769 while (http_header_value < e
770 && (*http_header_value == ' ' || *http_header_value == '\t')) {
771 http_header_value++;
772 }
773 } else {
774 /* There is no colon. Set the value to the end of the header line, which is
775 * effectively an empty string. */
776 http_header_value = e;
777 }
778
779 if (!strncasecmp(http_header_line, "Location:", sizeof("Location:")-1)) {
780 if (context && (tmpzval = php_stream_context_get_option(context, "http", "follow_location")) != NULL) {
781 follow_location = zval_is_true(tmpzval);
782 } else if (!((response_code >= 300 && response_code < 304)
783 || 307 == response_code || 308 == response_code)) {
784 /* we shouldn't redirect automatically
785 if follow_location isn't set and response_code not in (300, 301, 302, 303 and 307)
786 see http://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html#sec10.3.1
787 RFC 7238 defines 308: http://tools.ietf.org/html/rfc7238 */
788 follow_location = 0;
789 }
790 strlcpy(location, http_header_value, sizeof(location));
791 } else if (!strncasecmp(http_header_line, "Content-Type:", sizeof("Content-Type:")-1)) {
792 php_stream_notify_info(context, PHP_STREAM_NOTIFY_MIME_TYPE_IS, http_header_value, 0);
793 } else if (!strncasecmp(http_header_line, "Content-Length:", sizeof("Content-Length:")-1)) {
794 file_size = atoi(http_header_value);
795 php_stream_notify_file_size(context, file_size, http_header_line, 0);
796 } else if (
797 !strncasecmp(http_header_line, "Transfer-Encoding:", sizeof("Transfer-Encoding:")-1)
798 && !strncasecmp(http_header_value, "Chunked", sizeof("Chunked")-1)
799 ) {
800
801 /* create filter to decode response body */
802 if (!(options & STREAM_ONLY_GET_HEADERS)) {
803 zend_long decode = 1;
804
805 if (context && (tmpzval = php_stream_context_get_option(context, "http", "auto_decode")) != NULL) {
806 decode = zend_is_true(tmpzval);
807 }
808 if (decode) {
809 transfer_encoding = php_stream_filter_create("dechunk", NULL, php_stream_is_persistent(stream));
810 if (transfer_encoding) {
811 /* don't store transfer-encodeing header */
812 continue;
813 }
814 }
815 }
816 }
817
818 {
819 zval http_header;
820 ZVAL_STRINGL(&http_header, http_header_line, http_header_line_length);
821 zend_hash_next_index_insert(Z_ARRVAL_P(response_header), &http_header);
822 }
823 } else {
824 break;
825 }
826 }
827
828 if (!reqok || (location[0] != '\0' && follow_location)) {
829 if (!follow_location || (((options & STREAM_ONLY_GET_HEADERS) || ignore_errors) && redirect_max <= 1)) {
830 goto out;
831 }
832
833 if (location[0] != '\0')
834 php_stream_notify_info(context, PHP_STREAM_NOTIFY_REDIRECTED, location, 0);
835
836 php_stream_close(stream);
837 stream = NULL;
838
839 if (location[0] != '\0') {
840
841 char new_path[HTTP_HEADER_BLOCK_SIZE];
842 char loc_path[HTTP_HEADER_BLOCK_SIZE];
843
844 *new_path='\0';
845 if (strlen(location)<8 || (strncasecmp(location, "http://", sizeof("http://")-1) &&
846 strncasecmp(location, "https://", sizeof("https://")-1) &&
847 strncasecmp(location, "ftp://", sizeof("ftp://")-1) &&
848 strncasecmp(location, "ftps://", sizeof("ftps://")-1)))
849 {
850 if (*location != '/') {
851 if (*(location+1) != '\0' && resource->path) {
852 char *s = strrchr(ZSTR_VAL(resource->path), '/');
853 if (!s) {
854 s = ZSTR_VAL(resource->path);
855 if (!ZSTR_LEN(resource->path)) {
856 zend_string_release_ex(resource->path, 0);
857 resource->path = zend_string_init("/", 1, 0);
858 s = ZSTR_VAL(resource->path);
859 } else {
860 *s = '/';
861 }
862 }
863 s[1] = '\0';
864 if (resource->path &&
865 ZSTR_VAL(resource->path)[0] == '/' &&
866 ZSTR_VAL(resource->path)[1] == '\0') {
867 snprintf(loc_path, sizeof(loc_path) - 1, "%s%s", ZSTR_VAL(resource->path), location);
868 } else {
869 snprintf(loc_path, sizeof(loc_path) - 1, "%s/%s", ZSTR_VAL(resource->path), location);
870 }
871 } else {
872 snprintf(loc_path, sizeof(loc_path) - 1, "/%s", location);
873 }
874 } else {
875 strlcpy(loc_path, location, sizeof(loc_path));
876 }
877 if ((use_ssl && resource->port != 443) || (!use_ssl && resource->port != 80)) {
878 snprintf(new_path, sizeof(new_path) - 1, "%s://%s:%d%s", ZSTR_VAL(resource->scheme), ZSTR_VAL(resource->host), resource->port, loc_path);
879 } else {
880 snprintf(new_path, sizeof(new_path) - 1, "%s://%s%s", ZSTR_VAL(resource->scheme), ZSTR_VAL(resource->host), loc_path);
881 }
882 } else {
883 strlcpy(new_path, location, sizeof(new_path));
884 }
885
886 php_url_free(resource);
887 /* check for invalid redirection URLs */
888 if ((resource = php_url_parse(new_path)) == NULL) {
889 php_stream_wrapper_log_error(wrapper, options, "Invalid redirect URL! %s", new_path);
890 goto out;
891 }
892
893 #define CHECK_FOR_CNTRL_CHARS(val) { \
894 if (val) { \
895 unsigned char *s, *e; \
896 ZSTR_LEN(val) = php_url_decode(ZSTR_VAL(val), ZSTR_LEN(val)); \
897 s = (unsigned char*)ZSTR_VAL(val); e = s + ZSTR_LEN(val); \
898 while (s < e) { \
899 if (iscntrl(*s)) { \
900 php_stream_wrapper_log_error(wrapper, options, "Invalid redirect URL! %s", new_path); \
901 goto out; \
902 } \
903 s++; \
904 } \
905 } \
906 }
907 /* check for control characters in login, password & path */
908 if (strncasecmp(new_path, "http://", sizeof("http://") - 1) || strncasecmp(new_path, "https://", sizeof("https://") - 1)) {
909 CHECK_FOR_CNTRL_CHARS(resource->user);
910 CHECK_FOR_CNTRL_CHARS(resource->pass);
911 CHECK_FOR_CNTRL_CHARS(resource->path);
912 }
913 stream = php_stream_url_wrap_http_ex(
914 wrapper, new_path, mode, options, opened_path, context,
915 --redirect_max, HTTP_WRAPPER_REDIRECTED, response_header STREAMS_CC);
916 } else {
917 php_stream_wrapper_log_error(wrapper, options, "HTTP request failed! %s", tmp_line);
918 }
919 }
920 out:
921
922 smart_str_free(&req_buf);
923
924 if (http_header_line) {
925 efree(http_header_line);
926 }
927
928 if (resource) {
929 php_url_free(resource);
930 }
931
932 if (stream) {
933 if (header_init) {
934 ZVAL_COPY(&stream->wrapperdata, response_header);
935 }
936 php_stream_notify_progress_init(context, 0, file_size);
937
938 /* Restore original chunk size now that we're done with headers */
939 if (options & STREAM_WILL_CAST)
940 php_stream_set_chunk_size(stream, (int)chunk_size);
941
942 /* restore the users auto-detect-line-endings setting */
943 stream->flags |= eol_detect;
944
945 /* as far as streams are concerned, we are now at the start of
946 * the stream */
947 stream->position = 0;
948
949 /* restore mode */
950 strlcpy(stream->mode, mode, sizeof(stream->mode));
951
952 if (transfer_encoding) {
953 php_stream_filter_append(&stream->readfilters, transfer_encoding);
954 }
955 } else {
956 if (transfer_encoding) {
957 php_stream_filter_free(transfer_encoding);
958 }
959 }
960
961 return stream;
962 }
963 /* }}} */
964
php_stream_url_wrap_http(php_stream_wrapper * wrapper,const char * path,const char * mode,int options,zend_string ** opened_path,php_stream_context * context STREAMS_DC)965 php_stream *php_stream_url_wrap_http(php_stream_wrapper *wrapper, const char *path, const char *mode, int options, zend_string **opened_path, php_stream_context *context STREAMS_DC) /* {{{ */
966 {
967 php_stream *stream;
968 zval headers;
969 ZVAL_UNDEF(&headers);
970
971 stream = php_stream_url_wrap_http_ex(
972 wrapper, path, mode, options, opened_path, context,
973 PHP_URL_REDIRECT_MAX, HTTP_WRAPPER_HEADER_INIT, &headers STREAMS_CC);
974
975 if (!Z_ISUNDEF(headers)) {
976 if (FAILURE == zend_set_local_var_str(
977 "http_response_header", sizeof("http_response_header")-1, &headers, 1)) {
978 zval_ptr_dtor(&headers);
979 }
980 }
981
982 return stream;
983 }
984 /* }}} */
985
php_stream_http_stream_stat(php_stream_wrapper * wrapper,php_stream * stream,php_stream_statbuf * ssb)986 static int php_stream_http_stream_stat(php_stream_wrapper *wrapper, php_stream *stream, php_stream_statbuf *ssb) /* {{{ */
987 {
988 /* one day, we could fill in the details based on Date: and Content-Length:
989 * headers. For now, we return with a failure code to prevent the underlying
990 * file's details from being used instead. */
991 return -1;
992 }
993 /* }}} */
994
995 static const php_stream_wrapper_ops http_stream_wops = {
996 php_stream_url_wrap_http,
997 NULL, /* stream_close */
998 php_stream_http_stream_stat,
999 NULL, /* stat_url */
1000 NULL, /* opendir */
1001 "http",
1002 NULL, /* unlink */
1003 NULL, /* rename */
1004 NULL, /* mkdir */
1005 NULL, /* rmdir */
1006 NULL
1007 };
1008
1009 PHPAPI const php_stream_wrapper php_stream_http_wrapper = {
1010 &http_stream_wops,
1011 NULL,
1012 1 /* is_url */
1013 };
1014
