5941925118864ca5f3e54fc06d8a540247da582b
[libav.git] / libavformat / http.c
1 /*
2 * HTTP protocol for avconv client
3 * Copyright (c) 2000, 2001 Fabrice Bellard
4 *
5 * This file is part of Libav.
6 *
7 * Libav is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * Libav is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with Libav; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22 #include "libavutil/avstring.h"
23 #include "avformat.h"
24 #include <unistd.h>
25 #include "internal.h"
26 #include "network.h"
27 #include "http.h"
28 #include "os_support.h"
29 #include "httpauth.h"
30 #include "url.h"
31 #include "libavutil/opt.h"
32
33 /* XXX: POST protocol is not completely implemented because avconv uses
34 only a subset of it. */
35
36 /* used for protocol handling */
37 #define BUFFER_SIZE 1024
38 #define MAX_REDIRECTS 8
39
40 typedef struct {
41 const AVClass *class;
42 URLContext *hd;
43 unsigned char buffer[BUFFER_SIZE], *buf_ptr, *buf_end;
44 int line_count;
45 int http_code;
46 int64_t chunksize; /**< Used if "Transfer-Encoding: chunked" otherwise -1. */
47 int64_t off, filesize;
48 char location[MAX_URL_SIZE];
49 HTTPAuthState auth_state;
50 HTTPAuthState proxy_auth_state;
51 char *headers;
52 int willclose; /**< Set if the server correctly handles Connection: close and will close the connection after feeding us the content. */
53 int chunked_post;
54 } HTTPContext;
55
56 #define OFFSET(x) offsetof(HTTPContext, x)
57 #define D AV_OPT_FLAG_DECODING_PARAM
58 #define E AV_OPT_FLAG_ENCODING_PARAM
59 static const AVOption options[] = {
60 {"chunked_post", "use chunked transfer-encoding for posts", OFFSET(chunked_post), AV_OPT_TYPE_INT, {.dbl = 1}, 0, 1, E },
61 {"headers", "custom HTTP headers, can override built in default headers", OFFSET(headers), AV_OPT_TYPE_STRING, { 0 }, 0, 0, D|E },
62 {NULL}
63 };
64 #define HTTP_CLASS(flavor)\
65 static const AVClass flavor ## _context_class = {\
66 .class_name = #flavor,\
67 .item_name = av_default_item_name,\
68 .option = options,\
69 .version = LIBAVUTIL_VERSION_INT,\
70 };
71
72 HTTP_CLASS(http);
73 HTTP_CLASS(https);
74
75 static int http_connect(URLContext *h, const char *path, const char *local_path,
76 const char *hoststr, const char *auth,
77 const char *proxyauth, int *new_location);
78
79 void ff_http_init_auth_state(URLContext *dest, const URLContext *src)
80 {
81 memcpy(&((HTTPContext*)dest->priv_data)->auth_state,
82 &((HTTPContext*)src->priv_data)->auth_state, sizeof(HTTPAuthState));
83 memcpy(&((HTTPContext*)dest->priv_data)->proxy_auth_state,
84 &((HTTPContext*)src->priv_data)->proxy_auth_state,
85 sizeof(HTTPAuthState));
86 }
87
88 /* return non zero if error */
89 static int http_open_cnx(URLContext *h)
90 {
91 const char *path, *proxy_path, *lower_proto = "tcp", *local_path;
92 char hostname[1024], hoststr[1024], proto[10];
93 char auth[1024], proxyauth[1024];
94 char path1[1024];
95 char buf[1024], urlbuf[1024];
96 int port, use_proxy, err, location_changed = 0, redirects = 0;
97 HTTPAuthType cur_auth_type, cur_proxy_auth_type;
98 HTTPContext *s = h->priv_data;
99 URLContext *hd = NULL;
100
101 proxy_path = getenv("http_proxy");
102 use_proxy = (proxy_path != NULL) && !getenv("no_proxy") &&
103 av_strstart(proxy_path, "http://", NULL);
104
105 /* fill the dest addr */
106 redo:
107 /* needed in any case to build the host string */
108 av_url_split(proto, sizeof(proto), auth, sizeof(auth),
109 hostname, sizeof(hostname), &port,
110 path1, sizeof(path1), s->location);
111 ff_url_join(hoststr, sizeof(hoststr), NULL, NULL, hostname, port, NULL);
112
113 if (path1[0] == '\0')
114 path = "/";
115 else
116 path = path1;
117 local_path = path;
118 if (use_proxy) {
119 /* Reassemble the request URL without auth string - we don't
120 * want to leak the auth to the proxy. */
121 ff_url_join(urlbuf, sizeof(urlbuf), proto, NULL, hostname, port, "%s",
122 path1);
123 path = urlbuf;
124 av_url_split(NULL, 0, proxyauth, sizeof(proxyauth),
125 hostname, sizeof(hostname), &port, NULL, 0, proxy_path);
126 }
127 if (!strcmp(proto, "https")) {
128 lower_proto = "tls";
129 if (port < 0)
130 port = 443;
131 }
132 if (port < 0)
133 port = 80;
134
135 ff_url_join(buf, sizeof(buf), lower_proto, NULL, hostname, port, NULL);
136 err = ffurl_open(&hd, buf, AVIO_FLAG_READ_WRITE,
137 &h->interrupt_callback, NULL);
138 if (err < 0)
139 goto fail;
140
141 s->hd = hd;
142 cur_auth_type = s->auth_state.auth_type;
143 cur_proxy_auth_type = s->auth_state.auth_type;
144 if (http_connect(h, path, local_path, hoststr, auth, proxyauth, &location_changed) < 0)
145 goto fail;
146 if (s->http_code == 401) {
147 if (cur_auth_type == HTTP_AUTH_NONE && s->auth_state.auth_type != HTTP_AUTH_NONE) {
148 ffurl_close(hd);
149 goto redo;
150 } else
151 goto fail;
152 }
153 if (s->http_code == 407) {
154 if (cur_proxy_auth_type == HTTP_AUTH_NONE &&
155 s->proxy_auth_state.auth_type != HTTP_AUTH_NONE) {
156 ffurl_close(hd);
157 goto redo;
158 } else
159 goto fail;
160 }
161 if ((s->http_code == 301 || s->http_code == 302 || s->http_code == 303 || s->http_code == 307)
162 && location_changed == 1) {
163 /* url moved, get next */
164 ffurl_close(hd);
165 if (redirects++ >= MAX_REDIRECTS)
166 return AVERROR(EIO);
167 location_changed = 0;
168 goto redo;
169 }
170 return 0;
171 fail:
172 if (hd)
173 ffurl_close(hd);
174 s->hd = NULL;
175 return AVERROR(EIO);
176 }
177
178 static int http_open(URLContext *h, const char *uri, int flags)
179 {
180 HTTPContext *s = h->priv_data;
181
182 h->is_streamed = 1;
183
184 s->filesize = -1;
185 av_strlcpy(s->location, uri, sizeof(s->location));
186
187 if (s->headers) {
188 int len = strlen(s->headers);
189 if (len < 2 || strcmp("\r\n", s->headers + len - 2))
190 av_log(h, AV_LOG_WARNING, "No trailing CRLF found in HTTP header.\n");
191 }
192
193 return http_open_cnx(h);
194 }
195 static int http_getc(HTTPContext *s)
196 {
197 int len;
198 if (s->buf_ptr >= s->buf_end) {
199 len = ffurl_read(s->hd, s->buffer, BUFFER_SIZE);
200 if (len < 0) {
201 return AVERROR(EIO);
202 } else if (len == 0) {
203 return -1;
204 } else {
205 s->buf_ptr = s->buffer;
206 s->buf_end = s->buffer + len;
207 }
208 }
209 return *s->buf_ptr++;
210 }
211
212 static int http_get_line(HTTPContext *s, char *line, int line_size)
213 {
214 int ch;
215 char *q;
216
217 q = line;
218 for(;;) {
219 ch = http_getc(s);
220 if (ch < 0)
221 return AVERROR(EIO);
222 if (ch == '\n') {
223 /* process line */
224 if (q > line && q[-1] == '\r')
225 q--;
226 *q = '\0';
227
228 return 0;
229 } else {
230 if ((q - line) < line_size - 1)
231 *q++ = ch;
232 }
233 }
234 }
235
236 static int process_line(URLContext *h, char *line, int line_count,
237 int *new_location)
238 {
239 HTTPContext *s = h->priv_data;
240 char *tag, *p, *end;
241
242 /* end of header */
243 if (line[0] == '\0')
244 return 0;
245
246 p = line;
247 if (line_count == 0) {
248 while (!isspace(*p) && *p != '\0')
249 p++;
250 while (isspace(*p))
251 p++;
252 s->http_code = strtol(p, &end, 10);
253
254 av_dlog(NULL, "http_code=%d\n", s->http_code);
255
256 /* error codes are 4xx and 5xx, but regard 401 as a success, so we
257 * don't abort until all headers have been parsed. */
258 if (s->http_code >= 400 && s->http_code < 600 && (s->http_code != 401
259 || s->auth_state.auth_type != HTTP_AUTH_NONE) &&
260 (s->http_code != 407 || s->proxy_auth_state.auth_type != HTTP_AUTH_NONE)) {
261 end += strspn(end, SPACE_CHARS);
262 av_log(h, AV_LOG_WARNING, "HTTP error %d %s\n",
263 s->http_code, end);
264 return -1;
265 }
266 } else {
267 while (*p != '\0' && *p != ':')
268 p++;
269 if (*p != ':')
270 return 1;
271
272 *p = '\0';
273 tag = line;
274 p++;
275 while (isspace(*p))
276 p++;
277 if (!av_strcasecmp(tag, "Location")) {
278 strcpy(s->location, p);
279 *new_location = 1;
280 } else if (!av_strcasecmp (tag, "Content-Length") && s->filesize == -1) {
281 s->filesize = atoll(p);
282 } else if (!av_strcasecmp (tag, "Content-Range")) {
283 /* "bytes $from-$to/$document_size" */
284 const char *slash;
285 if (!strncmp (p, "bytes ", 6)) {
286 p += 6;
287 s->off = atoll(p);
288 if ((slash = strchr(p, '/')) && strlen(slash) > 0)
289 s->filesize = atoll(slash+1);
290 }
291 h->is_streamed = 0; /* we _can_ in fact seek */
292 } else if (!av_strcasecmp(tag, "Accept-Ranges") && !strncmp(p, "bytes", 5)) {
293 h->is_streamed = 0;
294 } else if (!av_strcasecmp (tag, "Transfer-Encoding") && !av_strncasecmp(p, "chunked", 7)) {
295 s->filesize = -1;
296 s->chunksize = 0;
297 } else if (!av_strcasecmp (tag, "WWW-Authenticate")) {
298 ff_http_auth_handle_header(&s->auth_state, tag, p);
299 } else if (!av_strcasecmp (tag, "Authentication-Info")) {
300 ff_http_auth_handle_header(&s->auth_state, tag, p);
301 } else if (!av_strcasecmp (tag, "Proxy-Authenticate")) {
302 ff_http_auth_handle_header(&s->proxy_auth_state, tag, p);
303 } else if (!av_strcasecmp (tag, "Connection")) {
304 if (!strcmp(p, "close"))
305 s->willclose = 1;
306 }
307 }
308 return 1;
309 }
310
311 static inline int has_header(const char *str, const char *header)
312 {
313 /* header + 2 to skip over CRLF prefix. (make sure you have one!) */
314 if (!str)
315 return 0;
316 return av_stristart(str, header + 2, NULL) || av_stristr(str, header);
317 }
318
319 static int http_connect(URLContext *h, const char *path, const char *local_path,
320 const char *hoststr, const char *auth,
321 const char *proxyauth, int *new_location)
322 {
323 HTTPContext *s = h->priv_data;
324 int post, err;
325 char line[1024];
326 char headers[1024] = "";
327 char *authstr = NULL, *proxyauthstr = NULL;
328 int64_t off = s->off;
329 int len = 0;
330 const char *method;
331
332
333 /* send http header */
334 post = h->flags & AVIO_FLAG_WRITE;
335 method = post ? "POST" : "GET";
336 authstr = ff_http_auth_create_response(&s->auth_state, auth, local_path,
337 method);
338 proxyauthstr = ff_http_auth_create_response(&s->proxy_auth_state, proxyauth,
339 local_path, method);
340
341 /* set default headers if needed */
342 if (!has_header(s->headers, "\r\nUser-Agent: "))
343 len += av_strlcatf(headers + len, sizeof(headers) - len,
344 "User-Agent: %s\r\n", LIBAVFORMAT_IDENT);
345 if (!has_header(s->headers, "\r\nAccept: "))
346 len += av_strlcpy(headers + len, "Accept: */*\r\n",
347 sizeof(headers) - len);
348 if (!has_header(s->headers, "\r\nRange: ") && !post)
349 len += av_strlcatf(headers + len, sizeof(headers) - len,
350 "Range: bytes=%"PRId64"-\r\n", s->off);
351 if (!has_header(s->headers, "\r\nConnection: "))
352 len += av_strlcpy(headers + len, "Connection: close\r\n",
353 sizeof(headers)-len);
354 if (!has_header(s->headers, "\r\nHost: "))
355 len += av_strlcatf(headers + len, sizeof(headers) - len,
356 "Host: %s\r\n", hoststr);
357
358 /* now add in custom headers */
359 if (s->headers)
360 av_strlcpy(headers + len, s->headers, sizeof(headers) - len);
361
362 snprintf(s->buffer, sizeof(s->buffer),
363 "%s %s HTTP/1.1\r\n"
364 "%s"
365 "%s"
366 "%s"
367 "%s%s"
368 "\r\n",
369 method,
370 path,
371 post && s->chunked_post ? "Transfer-Encoding: chunked\r\n" : "",
372 headers,
373 authstr ? authstr : "",
374 proxyauthstr ? "Proxy-" : "", proxyauthstr ? proxyauthstr : "");
375
376 av_freep(&authstr);
377 av_freep(&proxyauthstr);
378 if (ffurl_write(s->hd, s->buffer, strlen(s->buffer)) < 0)
379 return AVERROR(EIO);
380
381 /* init input buffer */
382 s->buf_ptr = s->buffer;
383 s->buf_end = s->buffer;
384 s->line_count = 0;
385 s->off = 0;
386 s->filesize = -1;
387 s->willclose = 0;
388 if (post) {
389 /* Pretend that it did work. We didn't read any header yet, since
390 * we've still to send the POST data, but the code calling this
391 * function will check http_code after we return. */
392 s->http_code = 200;
393 return 0;
394 }
395 s->chunksize = -1;
396
397 /* wait for header */
398 for(;;) {
399 if (http_get_line(s, line, sizeof(line)) < 0)
400 return AVERROR(EIO);
401
402 av_dlog(NULL, "header='%s'\n", line);
403
404 err = process_line(h, line, s->line_count, new_location);
405 if (err < 0)
406 return err;
407 if (err == 0)
408 break;
409 s->line_count++;
410 }
411
412 return (off == s->off) ? 0 : -1;
413 }
414
415
416 static int http_buf_read(URLContext *h, uint8_t *buf, int size)
417 {
418 HTTPContext *s = h->priv_data;
419 int len;
420 /* read bytes from input buffer first */
421 len = s->buf_end - s->buf_ptr;
422 if (len > 0) {
423 if (len > size)
424 len = size;
425 memcpy(buf, s->buf_ptr, len);
426 s->buf_ptr += len;
427 } else {
428 if (!s->willclose && s->filesize >= 0 && s->off >= s->filesize)
429 return AVERROR_EOF;
430 len = ffurl_read(s->hd, buf, size);
431 }
432 if (len > 0) {
433 s->off += len;
434 if (s->chunksize > 0)
435 s->chunksize -= len;
436 }
437 return len;
438 }
439
440 static int http_read(URLContext *h, uint8_t *buf, int size)
441 {
442 HTTPContext *s = h->priv_data;
443
444 if (s->chunksize >= 0) {
445 if (!s->chunksize) {
446 char line[32];
447
448 for(;;) {
449 do {
450 if (http_get_line(s, line, sizeof(line)) < 0)
451 return AVERROR(EIO);
452 } while (!*line); /* skip CR LF from last chunk */
453
454 s->chunksize = strtoll(line, NULL, 16);
455
456 av_dlog(NULL, "Chunked encoding data size: %"PRId64"'\n", s->chunksize);
457
458 if (!s->chunksize)
459 return 0;
460 break;
461 }
462 }
463 size = FFMIN(size, s->chunksize);
464 }
465 return http_buf_read(h, buf, size);
466 }
467
468 /* used only when posting data */
469 static int http_write(URLContext *h, const uint8_t *buf, int size)
470 {
471 char temp[11] = ""; /* 32-bit hex + CRLF + nul */
472 int ret;
473 char crlf[] = "\r\n";
474 HTTPContext *s = h->priv_data;
475
476 if (!s->chunked_post) {
477 /* non-chunked data is sent without any special encoding */
478 return ffurl_write(s->hd, buf, size);
479 }
480
481 /* silently ignore zero-size data since chunk encoding that would
482 * signal EOF */
483 if (size > 0) {
484 /* upload data using chunked encoding */
485 snprintf(temp, sizeof(temp), "%x\r\n", size);
486
487 if ((ret = ffurl_write(s->hd, temp, strlen(temp))) < 0 ||
488 (ret = ffurl_write(s->hd, buf, size)) < 0 ||
489 (ret = ffurl_write(s->hd, crlf, sizeof(crlf) - 1)) < 0)
490 return ret;
491 }
492 return size;
493 }
494
495 static int http_close(URLContext *h)
496 {
497 int ret = 0;
498 char footer[] = "0\r\n\r\n";
499 HTTPContext *s = h->priv_data;
500
501 /* signal end of chunked encoding if used */
502 if ((h->flags & AVIO_FLAG_WRITE) && s->chunked_post) {
503 ret = ffurl_write(s->hd, footer, sizeof(footer) - 1);
504 ret = ret > 0 ? 0 : ret;
505 }
506
507 if (s->hd)
508 ffurl_close(s->hd);
509 return ret;
510 }
511
512 static int64_t http_seek(URLContext *h, int64_t off, int whence)
513 {
514 HTTPContext *s = h->priv_data;
515 URLContext *old_hd = s->hd;
516 int64_t old_off = s->off;
517 uint8_t old_buf[BUFFER_SIZE];
518 int old_buf_size;
519
520 if (whence == AVSEEK_SIZE)
521 return s->filesize;
522 else if ((s->filesize == -1 && whence == SEEK_END) || h->is_streamed)
523 return -1;
524
525 /* we save the old context in case the seek fails */
526 old_buf_size = s->buf_end - s->buf_ptr;
527 memcpy(old_buf, s->buf_ptr, old_buf_size);
528 s->hd = NULL;
529 if (whence == SEEK_CUR)
530 off += s->off;
531 else if (whence == SEEK_END)
532 off += s->filesize;
533 s->off = off;
534
535 /* if it fails, continue on old connection */
536 if (http_open_cnx(h) < 0) {
537 memcpy(s->buffer, old_buf, old_buf_size);
538 s->buf_ptr = s->buffer;
539 s->buf_end = s->buffer + old_buf_size;
540 s->hd = old_hd;
541 s->off = old_off;
542 return -1;
543 }
544 ffurl_close(old_hd);
545 return off;
546 }
547
548 static int
549 http_get_file_handle(URLContext *h)
550 {
551 HTTPContext *s = h->priv_data;
552 return ffurl_get_file_handle(s->hd);
553 }
554
555 #if CONFIG_HTTP_PROTOCOL
556 URLProtocol ff_http_protocol = {
557 .name = "http",
558 .url_open = http_open,
559 .url_read = http_read,
560 .url_write = http_write,
561 .url_seek = http_seek,
562 .url_close = http_close,
563 .url_get_file_handle = http_get_file_handle,
564 .priv_data_size = sizeof(HTTPContext),
565 .priv_data_class = &http_context_class,
566 };
567 #endif
568 #if CONFIG_HTTPS_PROTOCOL
569 URLProtocol ff_https_protocol = {
570 .name = "https",
571 .url_open = http_open,
572 .url_read = http_read,
573 .url_write = http_write,
574 .url_seek = http_seek,
575 .url_close = http_close,
576 .url_get_file_handle = http_get_file_handle,
577 .priv_data_size = sizeof(HTTPContext),
578 .priv_data_class = &https_context_class,
579 };
580 #endif
581
582 #if CONFIG_HTTPPROXY_PROTOCOL
583 static int http_proxy_close(URLContext *h)
584 {
585 HTTPContext *s = h->priv_data;
586 if (s->hd)
587 ffurl_close(s->hd);
588 return 0;
589 }
590
591 static int http_proxy_open(URLContext *h, const char *uri, int flags)
592 {
593 HTTPContext *s = h->priv_data;
594 char hostname[1024], hoststr[1024];
595 char auth[1024], pathbuf[1024], *path;
596 char line[1024], lower_url[100];
597 int port, ret = 0;
598 HTTPAuthType cur_auth_type;
599 char *authstr;
600
601 h->is_streamed = 1;
602
603 av_url_split(NULL, 0, auth, sizeof(auth), hostname, sizeof(hostname), &port,
604 pathbuf, sizeof(pathbuf), uri);
605 ff_url_join(hoststr, sizeof(hoststr), NULL, NULL, hostname, port, NULL);
606 path = pathbuf;
607 if (*path == '/')
608 path++;
609
610 ff_url_join(lower_url, sizeof(lower_url), "tcp", NULL, hostname, port,
611 NULL);
612 redo:
613 ret = ffurl_open(&s->hd, lower_url, AVIO_FLAG_READ_WRITE,
614 &h->interrupt_callback, NULL);
615 if (ret < 0)
616 return ret;
617
618 authstr = ff_http_auth_create_response(&s->proxy_auth_state, auth,
619 path, "CONNECT");
620 snprintf(s->buffer, sizeof(s->buffer),
621 "CONNECT %s HTTP/1.1\r\n"
622 "Host: %s\r\n"
623 "Connection: close\r\n"
624 "%s%s"
625 "\r\n",
626 path,
627 hoststr,
628 authstr ? "Proxy-" : "", authstr ? authstr : "");
629 av_freep(&authstr);
630
631 if ((ret = ffurl_write(s->hd, s->buffer, strlen(s->buffer))) < 0)
632 goto fail;
633
634 s->buf_ptr = s->buffer;
635 s->buf_end = s->buffer;
636 s->line_count = 0;
637 s->filesize = -1;
638 cur_auth_type = s->proxy_auth_state.auth_type;
639
640 for (;;) {
641 int new_loc;
642 // Note: This uses buffering, potentially reading more than the
643 // HTTP header. If tunneling a protocol where the server starts
644 // the conversation, we might buffer part of that here, too.
645 // Reading that requires using the proper ffurl_read() function
646 // on this URLContext, not using the fd directly (as the tls
647 // protocol does). This shouldn't be an issue for tls though,
648 // since the client starts the conversation there, so there
649 // is no extra data that we might buffer up here.
650 if (http_get_line(s, line, sizeof(line)) < 0) {
651 ret = AVERROR(EIO);
652 goto fail;
653 }
654
655 av_dlog(h, "header='%s'\n", line);
656
657 ret = process_line(h, line, s->line_count, &new_loc);
658 if (ret < 0)
659 goto fail;
660 if (ret == 0)
661 break;
662 s->line_count++;
663 }
664 if (s->http_code == 407 && cur_auth_type == HTTP_AUTH_NONE &&
665 s->proxy_auth_state.auth_type != HTTP_AUTH_NONE) {
666 ffurl_close(s->hd);
667 s->hd = NULL;
668 goto redo;
669 }
670
671 if (s->http_code < 400)
672 return 0;
673 ret = AVERROR(EIO);
674
675 fail:
676 http_proxy_close(h);
677 return ret;
678 }
679
680 static int http_proxy_write(URLContext *h, const uint8_t *buf, int size)
681 {
682 HTTPContext *s = h->priv_data;
683 return ffurl_write(s->hd, buf, size);
684 }
685
686 URLProtocol ff_httpproxy_protocol = {
687 .name = "httpproxy",
688 .url_open = http_proxy_open,
689 .url_read = http_buf_read,
690 .url_write = http_proxy_write,
691 .url_close = http_proxy_close,
692 .url_get_file_handle = http_get_file_handle,
693 .priv_data_size = sizeof(HTTPContext),
694 };
695 #endif