http.c 26.7 KB
Newer Older
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 9 10 11
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
12
 * Libav is distributed in the hope that it will be useful,
13 14 15 16 17
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * 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 20
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */
21 22

#include "libavutil/avstring.h"
23
#include "avformat.h"
24
#include "internal.h"
25
#include "network.h"
26
#include "http.h"
27
#include "os_support.h"
28
#include "httpauth.h"
29
#include "url.h"
30
#include "libavutil/opt.h"
31

32 33 34 35
#if CONFIG_ZLIB
#include <zlib.h>
#endif

36
/* XXX: POST protocol is not completely implemented because avconv uses
Diego Biurrun's avatar
Diego Biurrun committed
37
   only a subset of it. */
38

39 40 41 42 43
/* The IO buffer size is unrelated to the max URL size in itself, but needs
 * to be large enough to fit the full request headers (including long
 * path names).
 */
#define BUFFER_SIZE MAX_URL_SIZE
44 45 46
#define MAX_REDIRECTS 8

typedef struct {
47
    const AVClass *class;
48 49 50 51
    URLContext *hd;
    unsigned char buffer[BUFFER_SIZE], *buf_ptr, *buf_end;
    int line_count;
    int http_code;
52
    int64_t chunksize;      /**< Used if "Transfer-Encoding: chunked" otherwise -1. */
53
    int64_t off, filesize;
54
    char location[MAX_URL_SIZE];
55
    HTTPAuthState auth_state;
56
    HTTPAuthState proxy_auth_state;
57
    char *headers;
58
    int willclose;          /**< Set if the server correctly handles Connection: close and will close the connection after feeding us the content. */
59
    int chunked_post;
60
    int end_chunked_post;   /**< A flag which indicates if the end of chunked encoding has been sent. */
61
    int end_header;         /**< A flag which indicates we have finished to read POST reply. */
62
    int multiple_requests;  /**< A flag which indicates if we use persistent connections. */
63 64
    uint8_t *post_data;
    int post_datalen;
65 66 67 68 69
#if CONFIG_ZLIB
    int compressed;
    z_stream inflate_stream;
    uint8_t *inflate_buffer;
#endif
70 71
} HTTPContext;

72
#define OFFSET(x) offsetof(HTTPContext, x)
73 74
#define D AV_OPT_FLAG_DECODING_PARAM
#define E AV_OPT_FLAG_ENCODING_PARAM
75
static const AVOption options[] = {
76
{"chunked_post", "use chunked transfer-encoding for posts", OFFSET(chunked_post), AV_OPT_TYPE_INT, {.i64 = 1}, 0, 1, E },
77
{"headers", "custom HTTP headers, can override built in default headers", OFFSET(headers), AV_OPT_TYPE_STRING, { 0 }, 0, 0, D|E },
78
{"multiple_requests", "use persistent connections", OFFSET(multiple_requests), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1, D|E },
79
{"post_data", "custom HTTP post data", OFFSET(post_data), AV_OPT_TYPE_BINARY, .flags = D|E },
80 81
{NULL}
};
82 83 84 85 86 87
#define HTTP_CLASS(flavor)\
static const AVClass flavor ## _context_class = {\
    .class_name     = #flavor,\
    .item_name      = av_default_item_name,\
    .option         = options,\
    .version        = LIBAVUTIL_VERSION_INT,\
Mans Rullgard's avatar
Mans Rullgard committed
88
}
89

90 91 92
HTTP_CLASS(http);
HTTP_CLASS(https);

93 94 95
static int http_connect(URLContext *h, const char *path, const char *local_path,
                        const char *hoststr, const char *auth,
                        const char *proxyauth, int *new_location);
96

97 98 99 100
void ff_http_init_auth_state(URLContext *dest, const URLContext *src)
{
    memcpy(&((HTTPContext*)dest->priv_data)->auth_state,
           &((HTTPContext*)src->priv_data)->auth_state, sizeof(HTTPAuthState));
101 102 103
    memcpy(&((HTTPContext*)dest->priv_data)->proxy_auth_state,
           &((HTTPContext*)src->priv_data)->proxy_auth_state,
           sizeof(HTTPAuthState));
104 105
}

106 107 108
/* return non zero if error */
static int http_open_cnx(URLContext *h)
{
109
    const char *path, *proxy_path, *lower_proto = "tcp", *local_path;
110
    char hostname[1024], hoststr[1024], proto[10];
111
    char auth[1024], proxyauth[1024] = "";
112 113
    char path1[MAX_URL_SIZE];
    char buf[1024], urlbuf[MAX_URL_SIZE];
114
    int port, use_proxy, err, location_changed = 0, redirects = 0, attempts = 0;
115
    HTTPAuthType cur_auth_type, cur_proxy_auth_type;
116 117 118 119 120
    HTTPContext *s = h->priv_data;

    /* fill the dest addr */
 redo:
    /* needed in any case to build the host string */
121 122
    av_url_split(proto, sizeof(proto), auth, sizeof(auth),
                 hostname, sizeof(hostname), &port,
Martin Storsjö's avatar
Martin Storsjö committed
123
                 path1, sizeof(path1), s->location);
124
    ff_url_join(hoststr, sizeof(hoststr), NULL, NULL, hostname, port, NULL);
125

126 127 128 129
    proxy_path = getenv("http_proxy");
    use_proxy = !ff_http_match_no_proxy(getenv("no_proxy"), hostname) &&
                proxy_path != NULL && av_strstart(proxy_path, "http://", NULL);

130 131
    if (!strcmp(proto, "https")) {
        lower_proto = "tls";
132
        use_proxy = 0;
133 134 135 136 137 138
        if (port < 0)
            port = 443;
    }
    if (port < 0)
        port = 80;

139 140 141 142 143
    if (path1[0] == '\0')
        path = "/";
    else
        path = path1;
    local_path = path;
144
    if (use_proxy) {
145 146 147 148 149 150 151
        /* Reassemble the request URL without auth string - we don't
         * want to leak the auth to the proxy. */
        ff_url_join(urlbuf, sizeof(urlbuf), proto, NULL, hostname, port, "%s",
                    path1);
        path = urlbuf;
        av_url_split(NULL, 0, proxyauth, sizeof(proxyauth),
                     hostname, sizeof(hostname), &port, NULL, 0, proxy_path);
152 153
    }

154
    ff_url_join(buf, sizeof(buf), lower_proto, NULL, hostname, port, NULL);
155

156
    if (!s->hd) {
157
        err = ffurl_open(&s->hd, buf, AVIO_FLAG_READ_WRITE,
158 159 160 161 162
                         &h->interrupt_callback, NULL);
        if (err < 0)
            goto fail;
    }

163
    cur_auth_type = s->auth_state.auth_type;
164 165
    cur_proxy_auth_type = s->auth_state.auth_type;
    if (http_connect(h, path, local_path, hoststr, auth, proxyauth, &location_changed) < 0)
166
        goto fail;
167
    attempts++;
168
    if (s->http_code == 401) {
169 170
        if ((cur_auth_type == HTTP_AUTH_NONE || s->auth_state.stale) &&
            s->auth_state.auth_type != HTTP_AUTH_NONE && attempts < 4) {
171 172
            ffurl_close(s->hd);
            s->hd = NULL;
173 174 175 176
            goto redo;
        } else
            goto fail;
    }
177
    if (s->http_code == 407) {
178 179
        if ((cur_proxy_auth_type == HTTP_AUTH_NONE || s->proxy_auth_state.stale) &&
            s->proxy_auth_state.auth_type != HTTP_AUTH_NONE && attempts < 4) {
180 181
            ffurl_close(s->hd);
            s->hd = NULL;
182 183 184 185
            goto redo;
        } else
            goto fail;
    }
186 187
    if ((s->http_code == 301 || s->http_code == 302 || s->http_code == 303 || s->http_code == 307)
        && location_changed == 1) {
188
        /* url moved, get next */
189 190
        ffurl_close(s->hd);
        s->hd = NULL;
191
        if (redirects++ >= MAX_REDIRECTS)
192
            return AVERROR(EIO);
193 194 195
        /* Restart the authentication process with the new target, which
         * might use a different auth mechanism. */
        memset(&s->auth_state, 0, sizeof(s->auth_state));
196
        attempts = 0;
197 198 199 200 201
        location_changed = 0;
        goto redo;
    }
    return 0;
 fail:
202 203
    if (s->hd)
        ffurl_close(s->hd);
204
    s->hd = NULL;
205
    return AVERROR(EIO);
206 207
}

208 209 210 211 212 213 214 215 216 217
int ff_http_do_new_request(URLContext *h, const char *uri)
{
    HTTPContext *s = h->priv_data;

    s->off = 0;
    av_strlcpy(s->location, uri, sizeof(s->location));

    return http_open_cnx(h);
}

218 219
static int http_open(URLContext *h, const char *uri, int flags)
{
220
    HTTPContext *s = h->priv_data;
221 222 223 224

    h->is_streamed = 1;

    s->filesize = -1;
225
    av_strlcpy(s->location, uri, sizeof(s->location));
226

227 228 229
    if (s->headers) {
        int len = strlen(s->headers);
        if (len < 2 || strcmp("\r\n", s->headers + len - 2))
230
            av_log(h, AV_LOG_WARNING, "No trailing CRLF found in HTTP header.\n");
231 232
    }

233
    return http_open_cnx(h);
234 235 236 237 238
}
static int http_getc(HTTPContext *s)
{
    int len;
    if (s->buf_ptr >= s->buf_end) {
239
        len = ffurl_read(s->hd, s->buffer, BUFFER_SIZE);
240
        if (len < 0) {
241
            return len;
242 243 244 245 246 247 248 249 250 251
        } else if (len == 0) {
            return -1;
        } else {
            s->buf_ptr = s->buffer;
            s->buf_end = s->buffer + len;
        }
    }
    return *s->buf_ptr++;
}

252 253 254 255 256 257 258 259 260
static int http_get_line(HTTPContext *s, char *line, int line_size)
{
    int ch;
    char *q;

    q = line;
    for(;;) {
        ch = http_getc(s);
        if (ch < 0)
261
            return ch;
262 263 264 265 266 267 268 269 270 271 272 273 274 275
        if (ch == '\n') {
            /* process line */
            if (q > line && q[-1] == '\r')
                q--;
            *q = '\0';

            return 0;
        } else {
            if ((q - line) < line_size - 1)
                *q++ = ch;
        }
    }
}

276 277 278 279
static int process_line(URLContext *h, char *line, int line_count,
                        int *new_location)
{
    HTTPContext *s = h->priv_data;
280
    char *tag, *p, *end;
281 282

    /* end of header */
283 284
    if (line[0] == '\0') {
        s->end_header = 1;
285
        return 0;
286
    }
287 288 289

    p = line;
    if (line_count == 0) {
290
        while (!av_isspace(*p) && *p != '\0')
291
            p++;
292
        while (av_isspace(*p))
293
            p++;
294
        s->http_code = strtol(p, &end, 10);
295

Luca Barbato's avatar
Luca Barbato committed
296
        av_dlog(NULL, "http_code=%d\n", s->http_code);
297

298 299
        /* error codes are 4xx and 5xx, but regard 401 as a success, so we
         * don't abort until all headers have been parsed. */
300
        if (s->http_code >= 400 && s->http_code < 600 && (s->http_code != 401
301 302
            || s->auth_state.auth_type != HTTP_AUTH_NONE) &&
            (s->http_code != 407 || s->proxy_auth_state.auth_type != HTTP_AUTH_NONE)) {
303
            end += strspn(end, SPACE_CHARS);
304
            av_log(h, AV_LOG_WARNING, "HTTP error %d %s\n",
305
                   s->http_code, end);
Alex Beregszaszi's avatar
Alex Beregszaszi committed
306
            return -1;
307
        }
308 309 310 311 312 313 314 315 316
    } else {
        while (*p != '\0' && *p != ':')
            p++;
        if (*p != ':')
            return 1;

        *p = '\0';
        tag = line;
        p++;
317
        while (av_isspace(*p))
318
            p++;
319
        if (!av_strcasecmp(tag, "Location")) {
320
            av_strlcpy(s->location, p, sizeof(s->location));
321
            *new_location = 1;
322
        } else if (!av_strcasecmp (tag, "Content-Length") && s->filesize == -1) {
323
            s->filesize = strtoll(p, NULL, 10);
324
        } else if (!av_strcasecmp (tag, "Content-Range")) {
325 326 327 328
            /* "bytes $from-$to/$document_size" */
            const char *slash;
            if (!strncmp (p, "bytes ", 6)) {
                p += 6;
329
                s->off = strtoll(p, NULL, 10);
330
                if ((slash = strchr(p, '/')) && strlen(slash) > 0)
331
                    s->filesize = strtoll(slash+1, NULL, 10);
332 333
            }
            h->is_streamed = 0; /* we _can_ in fact seek */
334
        } else if (!av_strcasecmp(tag, "Accept-Ranges") && !strncmp(p, "bytes", 5)) {
335
            h->is_streamed = 0;
336
        } else if (!av_strcasecmp (tag, "Transfer-Encoding") && !av_strncasecmp(p, "chunked", 7)) {
337 338
            s->filesize = -1;
            s->chunksize = 0;
339
        } else if (!av_strcasecmp (tag, "WWW-Authenticate")) {
340
            ff_http_auth_handle_header(&s->auth_state, tag, p);
341
        } else if (!av_strcasecmp (tag, "Authentication-Info")) {
342
            ff_http_auth_handle_header(&s->auth_state, tag, p);
343 344
        } else if (!av_strcasecmp (tag, "Proxy-Authenticate")) {
            ff_http_auth_handle_header(&s->proxy_auth_state, tag, p);
345
        } else if (!av_strcasecmp (tag, "Connection")) {
346 347
            if (!strcmp(p, "close"))
                s->willclose = 1;
348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372
        } else if (!av_strcasecmp (tag, "Content-Encoding")) {
            if (!av_strncasecmp(p, "gzip", 4) || !av_strncasecmp(p, "deflate", 7)) {
#if CONFIG_ZLIB
                s->compressed = 1;
                inflateEnd(&s->inflate_stream);
                if (inflateInit2(&s->inflate_stream, 32 + 15) != Z_OK) {
                    av_log(h, AV_LOG_WARNING, "Error during zlib initialisation: %s\n",
                           s->inflate_stream.msg);
                    return AVERROR(ENOSYS);
                }
                if (zlibCompileFlags() & (1 << 17)) {
                    av_log(h, AV_LOG_WARNING, "Your zlib was compiled without gzip support.\n");
                    return AVERROR(ENOSYS);
                }
#else
                av_log(h, AV_LOG_WARNING, "Compressed (%s) content, need zlib with gzip support\n", p);
                return AVERROR(ENOSYS);
#endif
            } else if (!av_strncasecmp(p, "identity", 8)) {
                // The normal, no-encoding case (although servers shouldn't include
                // the header at all if this is the case).
            } else {
                av_log(h, AV_LOG_WARNING, "Unknown content coding: %s\n", p);
                return AVERROR(ENOSYS);
            }
373 374 375 376 377
        }
    }
    return 1;
}

378 379 380
static inline int has_header(const char *str, const char *header)
{
    /* header + 2 to skip over CRLF prefix. (make sure you have one!) */
381 382
    if (!str)
        return 0;
383 384 385
    return av_stristart(str, header + 2, NULL) || av_stristr(str, header);
}

386 387 388
static int http_read_header(URLContext *h, int *new_location)
{
    HTTPContext *s = h->priv_data;
389
    char line[MAX_URL_SIZE];
390 391
    int err = 0;

392 393
    s->chunksize = -1;

394
    for (;;) {
395 396
        if ((err = http_get_line(s, line, sizeof(line))) < 0)
            return err;
397 398 399 400 401 402 403 404 405 406 407 408 409 410

        av_dlog(NULL, "header='%s'\n", line);

        err = process_line(h, line, s->line_count, new_location);
        if (err < 0)
            return err;
        if (err == 0)
            break;
        s->line_count++;
    }

    return err;
}

411 412 413
static int http_connect(URLContext *h, const char *path, const char *local_path,
                        const char *hoststr, const char *auth,
                        const char *proxyauth, int *new_location)
414 415
{
    HTTPContext *s = h->priv_data;
416
    int post, err;
417
    char headers[1024] = "";
418
    char *authstr = NULL, *proxyauthstr = NULL;
419
    int64_t off = s->off;
420
    int len = 0;
421
    const char *method;
422 423 424


    /* send http header */
425
    post = h->flags & AVIO_FLAG_WRITE;
426 427 428 429 430 431 432 433

    if (s->post_data) {
        /* force POST method and disable chunked encoding when
         * custom HTTP post data is set */
        post = 1;
        s->chunked_post = 0;
    }

434 435 436 437 438
    method = post ? "POST" : "GET";
    authstr = ff_http_auth_create_response(&s->auth_state, auth, local_path,
                                           method);
    proxyauthstr = ff_http_auth_create_response(&s->proxy_auth_state, proxyauth,
                                                local_path, method);
439 440 441 442 443 444 445 446

    /* set default headers if needed */
    if (!has_header(s->headers, "\r\nUser-Agent: "))
       len += av_strlcatf(headers + len, sizeof(headers) - len,
                          "User-Agent: %s\r\n", LIBAVFORMAT_IDENT);
    if (!has_header(s->headers, "\r\nAccept: "))
        len += av_strlcpy(headers + len, "Accept: */*\r\n",
                          sizeof(headers) - len);
447
    if (!has_header(s->headers, "\r\nRange: ") && !post)
448
        len += av_strlcatf(headers + len, sizeof(headers) - len,
449
                           "Range: bytes=%"PRId64"-\r\n", s->off);
450 451 452 453 454 455 456 457 458 459 460

    if (!has_header(s->headers, "\r\nConnection: ")) {
        if (s->multiple_requests) {
            len += av_strlcpy(headers + len, "Connection: keep-alive\r\n",
                              sizeof(headers) - len);
        } else {
            len += av_strlcpy(headers + len, "Connection: close\r\n",
                              sizeof(headers) - len);
        }
    }

461 462 463
    if (!has_header(s->headers, "\r\nHost: "))
        len += av_strlcatf(headers + len, sizeof(headers) - len,
                           "Host: %s\r\n", hoststr);
464 465 466
    if (!has_header(s->headers, "\r\nContent-Length: ") && s->post_data)
        len += av_strlcatf(headers + len, sizeof(headers) - len,
                           "Content-Length: %d\r\n", s->post_datalen);
467 468

    /* now add in custom headers */
469 470
    if (s->headers)
        av_strlcpy(headers + len, s->headers, sizeof(headers) - len);
471

472 473
    snprintf(s->buffer, sizeof(s->buffer),
             "%s %s HTTP/1.1\r\n"
474
             "%s"
475
             "%s"
476
             "%s"
477
             "%s%s"
478
             "\r\n",
479
             method,
480
             path,
481
             post && s->chunked_post ? "Transfer-Encoding: chunked\r\n" : "",
482
             headers,
483 484
             authstr ? authstr : "",
             proxyauthstr ? "Proxy-" : "", proxyauthstr ? proxyauthstr : "");
485

486
    av_freep(&authstr);
487
    av_freep(&proxyauthstr);
488 489
    if ((err = ffurl_write(s->hd, s->buffer, strlen(s->buffer))) < 0)
        return err;
490

491 492 493 494
    if (s->post_data)
        if ((err = ffurl_write(s->hd, s->post_data, s->post_datalen)) < 0)
            return err;

495 496 497 498 499
    /* init input buffer */
    s->buf_ptr = s->buffer;
    s->buf_end = s->buffer;
    s->line_count = 0;
    s->off = 0;
500
    s->filesize = -1;
501
    s->willclose = 0;
502
    s->end_chunked_post = 0;
503
    s->end_header = 0;
504
    if (post && !s->post_data) {
505 506 507 508
        /* Pretend that it did work. We didn't read any header yet, since
         * we've still to send the POST data, but the code calling this
         * function will check http_code after we return. */
        s->http_code = 200;
509 510 511 512
        return 0;
    }

    /* wait for header */
513 514 515
    err = http_read_header(h, new_location);
    if (err < 0)
        return err;
516 517 518 519 520

    return (off == s->off) ? 0 : -1;
}


521
static int http_buf_read(URLContext *h, uint8_t *buf, int size)
522 523 524
{
    HTTPContext *s = h->priv_data;
    int len;
525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544
    /* read bytes from input buffer first */
    len = s->buf_end - s->buf_ptr;
    if (len > 0) {
        if (len > size)
            len = size;
        memcpy(buf, s->buf_ptr, len);
        s->buf_ptr += len;
    } else {
        if (!s->willclose && s->filesize >= 0 && s->off >= s->filesize)
            return AVERROR_EOF;
        len = ffurl_read(s->hd, buf, size);
    }
    if (len > 0) {
        s->off += len;
        if (s->chunksize > 0)
            s->chunksize -= len;
    }
    return len;
}

545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576
#if CONFIG_ZLIB
#define DECOMPRESS_BUF_SIZE (256 * 1024)
static int http_buf_read_compressed(URLContext *h, uint8_t *buf, int size)
{
    HTTPContext *s = h->priv_data;
    int ret;

    if (!s->inflate_buffer) {
        s->inflate_buffer = av_malloc(DECOMPRESS_BUF_SIZE);
        if (!s->inflate_buffer)
            return AVERROR(ENOMEM);
    }

    if (s->inflate_stream.avail_in == 0) {
        int read = http_buf_read(h, s->inflate_buffer, DECOMPRESS_BUF_SIZE);
        if (read <= 0)
            return read;
        s->inflate_stream.next_in  = s->inflate_buffer;
        s->inflate_stream.avail_in = read;
    }

    s->inflate_stream.avail_out = size;
    s->inflate_stream.next_out  = buf;

    ret = inflate(&s->inflate_stream, Z_SYNC_FLUSH);
    if (ret != Z_OK && ret != Z_STREAM_END)
        av_log(h, AV_LOG_WARNING, "inflate return value: %d, %s\n", ret, s->inflate_stream.msg);

    return size - s->inflate_stream.avail_out;
}
#endif

577 578 579
static int http_read(URLContext *h, uint8_t *buf, int size)
{
    HTTPContext *s = h->priv_data;
580 581
    int err, new_location;

582 583 584
    if (!s->hd)
        return AVERROR_EOF;

585 586 587 588
    if (s->end_chunked_post && !s->end_header) {
        err = http_read_header(h, &new_location);
        if (err < 0)
            return err;
589
    }
590

591 592 593 594 595 596
    if (s->chunksize >= 0) {
        if (!s->chunksize) {
            char line[32];

            for(;;) {
                do {
597 598
                    if ((err = http_get_line(s, line, sizeof(line))) < 0)
                        return err;
599 600 601 602
                } while (!*line);    /* skip CR LF from last chunk */

                s->chunksize = strtoll(line, NULL, 16);

Luca Barbato's avatar
Luca Barbato committed
603
                av_dlog(NULL, "Chunked encoding data size: %"PRId64"'\n", s->chunksize);
604 605 606 607 608 609 610 611

                if (!s->chunksize)
                    return 0;
                break;
            }
        }
        size = FFMIN(size, s->chunksize);
    }
612 613 614 615
#if CONFIG_ZLIB
    if (s->compressed)
        return http_buf_read_compressed(h, buf, size);
#endif
616
    return http_buf_read(h, buf, size);
617 618 619
}

/* used only when posting data */
620
static int http_write(URLContext *h, const uint8_t *buf, int size)
621
{
622
    char temp[11] = "";  /* 32-bit hex + CRLF + nul */
623 624
    int ret;
    char crlf[] = "\r\n";
625
    HTTPContext *s = h->priv_data;
626

627
    if (!s->chunked_post) {
Martin Storsjö's avatar
Martin Storsjö committed
628
        /* non-chunked data is sent without any special encoding */
629
        return ffurl_write(s->hd, buf, size);
630 631 632 633 634 635
    }

    /* silently ignore zero-size data since chunk encoding that would
     * signal EOF */
    if (size > 0) {
        /* upload data using chunked encoding */
Martin Storsjö's avatar
Martin Storsjö committed
636
        snprintf(temp, sizeof(temp), "%x\r\n", size);
637

638 639 640
        if ((ret = ffurl_write(s->hd, temp, strlen(temp))) < 0 ||
            (ret = ffurl_write(s->hd, buf, size)) < 0 ||
            (ret = ffurl_write(s->hd, crlf, sizeof(crlf) - 1)) < 0)
641 642 643
            return ret;
    }
    return size;
644 645
}

646
static int http_shutdown(URLContext *h, int flags)
647
{
648 649
    int ret = 0;
    char footer[] = "0\r\n\r\n";
650
    HTTPContext *s = h->priv_data;
651 652

    /* signal end of chunked encoding if used */
653
    if ((flags & AVIO_FLAG_WRITE) && s->chunked_post) {
654
        ret = ffurl_write(s->hd, footer, sizeof(footer) - 1);
655
        ret = ret > 0 ? 0 : ret;
656 657 658 659 660 661 662 663 664 665 666
        s->end_chunked_post = 1;
    }

    return ret;
}

static int http_close(URLContext *h)
{
    int ret = 0;
    HTTPContext *s = h->priv_data;

667 668 669 670 671
#if CONFIG_ZLIB
    inflateEnd(&s->inflate_stream);
    av_freep(&s->inflate_buffer);
#endif

672 673 674
    if (!s->end_chunked_post) {
        /* Close the write direction by sending the end of chunked encoding. */
        ret = http_shutdown(h, h->flags);
675 676
    }

677
    if (s->hd)
678
        ffurl_close(s->hd);
679
    return ret;
680 681
}

682
static int64_t http_seek(URLContext *h, int64_t off, int whence)
683 684 685
{
    HTTPContext *s = h->priv_data;
    URLContext *old_hd = s->hd;
686
    int64_t old_off = s->off;
687 688
    uint8_t old_buf[BUFFER_SIZE];
    int old_buf_size;
689 690 691 692 693 694 695

    if (whence == AVSEEK_SIZE)
        return s->filesize;
    else if ((s->filesize == -1 && whence == SEEK_END) || h->is_streamed)
        return -1;

    /* we save the old context in case the seek fails */
696 697
    old_buf_size = s->buf_end - s->buf_ptr;
    memcpy(old_buf, s->buf_ptr, old_buf_size);
698 699 700 701 702 703 704 705 706
    s->hd = NULL;
    if (whence == SEEK_CUR)
        off += s->off;
    else if (whence == SEEK_END)
        off += s->filesize;
    s->off = off;

    /* if it fails, continue on old connection */
    if (http_open_cnx(h) < 0) {
707 708 709
        memcpy(s->buffer, old_buf, old_buf_size);
        s->buf_ptr = s->buffer;
        s->buf_end = s->buffer + old_buf_size;
710 711 712 713
        s->hd = old_hd;
        s->off = old_off;
        return -1;
    }
714
    ffurl_close(old_hd);
715 716 717
    return off;
}

718 719 720 721
static int
http_get_file_handle(URLContext *h)
{
    HTTPContext *s = h->priv_data;
722
    return ffurl_get_file_handle(s->hd);
723 724
}

725
#if CONFIG_HTTP_PROTOCOL
726
URLProtocol ff_http_protocol = {
727 728 729 730 731 732
    .name                = "http",
    .url_open            = http_open,
    .url_read            = http_read,
    .url_write           = http_write,
    .url_seek            = http_seek,
    .url_close           = http_close,
733
    .url_get_file_handle = http_get_file_handle,
734
    .url_shutdown        = http_shutdown,
735
    .priv_data_size      = sizeof(HTTPContext),
736
    .priv_data_class     = &http_context_class,
737
    .flags               = URL_PROTOCOL_FLAG_NETWORK,
738
};
739 740 741 742 743 744 745 746 747 748
#endif
#if CONFIG_HTTPS_PROTOCOL
URLProtocol ff_https_protocol = {
    .name                = "https",
    .url_open            = http_open,
    .url_read            = http_read,
    .url_write           = http_write,
    .url_seek            = http_seek,
    .url_close           = http_close,
    .url_get_file_handle = http_get_file_handle,
749
    .url_shutdown        = http_shutdown,
750
    .priv_data_size      = sizeof(HTTPContext),
751
    .priv_data_class     = &https_context_class,
752
    .flags               = URL_PROTOCOL_FLAG_NETWORK,
753 754
};
#endif
755 756 757 758 759 760 761 762 763 764 765 766 767 768 769

#if CONFIG_HTTPPROXY_PROTOCOL
static int http_proxy_close(URLContext *h)
{
    HTTPContext *s = h->priv_data;
    if (s->hd)
        ffurl_close(s->hd);
    return 0;
}

static int http_proxy_open(URLContext *h, const char *uri, int flags)
{
    HTTPContext *s = h->priv_data;
    char hostname[1024], hoststr[1024];
    char auth[1024], pathbuf[1024], *path;
770
    char lower_url[100];
771
    int port, ret = 0, attempts = 0;
772 773
    HTTPAuthType cur_auth_type;
    char *authstr;
774
    int new_loc;
775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814

    h->is_streamed = 1;

    av_url_split(NULL, 0, auth, sizeof(auth), hostname, sizeof(hostname), &port,
                 pathbuf, sizeof(pathbuf), uri);
    ff_url_join(hoststr, sizeof(hoststr), NULL, NULL, hostname, port, NULL);
    path = pathbuf;
    if (*path == '/')
        path++;

    ff_url_join(lower_url, sizeof(lower_url), "tcp", NULL, hostname, port,
                NULL);
redo:
    ret = ffurl_open(&s->hd, lower_url, AVIO_FLAG_READ_WRITE,
                     &h->interrupt_callback, NULL);
    if (ret < 0)
        return ret;

    authstr = ff_http_auth_create_response(&s->proxy_auth_state, auth,
                                           path, "CONNECT");
    snprintf(s->buffer, sizeof(s->buffer),
             "CONNECT %s HTTP/1.1\r\n"
             "Host: %s\r\n"
             "Connection: close\r\n"
             "%s%s"
             "\r\n",
             path,
             hoststr,
             authstr ? "Proxy-" : "", authstr ? authstr : "");
    av_freep(&authstr);

    if ((ret = ffurl_write(s->hd, s->buffer, strlen(s->buffer))) < 0)
        goto fail;

    s->buf_ptr = s->buffer;
    s->buf_end = s->buffer;
    s->line_count = 0;
    s->filesize = -1;
    cur_auth_type = s->proxy_auth_state.auth_type;

815 816 817 818 819 820 821 822 823 824 825 826
    /* Note: This uses buffering, potentially reading more than the
     * HTTP header. If tunneling a protocol where the server starts
     * the conversation, we might buffer part of that here, too.
     * Reading that requires using the proper ffurl_read() function
     * on this URLContext, not using the fd directly (as the tls
     * protocol does). This shouldn't be an issue for tls though,
     * since the client starts the conversation there, so there
     * is no extra data that we might buffer up here.
     */
    ret = http_read_header(h, &new_loc);
    if (ret < 0)
        goto fail;
827

828 829 830 831
    attempts++;
    if (s->http_code == 407 &&
        (cur_auth_type == HTTP_AUTH_NONE || s->proxy_auth_state.stale) &&
        s->proxy_auth_state.auth_type != HTTP_AUTH_NONE && attempts < 2) {
832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859
        ffurl_close(s->hd);
        s->hd = NULL;
        goto redo;
    }

    if (s->http_code < 400)
        return 0;
    ret = AVERROR(EIO);

fail:
    http_proxy_close(h);
    return ret;
}

static int http_proxy_write(URLContext *h, const uint8_t *buf, int size)
{
    HTTPContext *s = h->priv_data;
    return ffurl_write(s->hd, buf, size);
}

URLProtocol ff_httpproxy_protocol = {
    .name                = "httpproxy",
    .url_open            = http_proxy_open,
    .url_read            = http_buf_read,
    .url_write           = http_proxy_write,
    .url_close           = http_proxy_close,
    .url_get_file_handle = http_get_file_handle,
    .priv_data_size      = sizeof(HTTPContext),
860
    .flags               = URL_PROTOCOL_FLAG_NETWORK,
861 862
};
#endif