/*
* HTTP protocol for ffmpeg client
- * Copyright (c) 2000, 2001 Fabrice Bellard.
+ * Copyright (c) 2000, 2001 Fabrice Bellard
*
- * This file is part of FFmpeg.
+ * This file is part of Libav.
*
- * FFmpeg is free software; you can redistribute it and/or
+ * Libav is free software; you can redistribute it and/or
* 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.
*
- * FFmpeg is distributed in the hope that it will be useful,
+ * Libav is distributed in the hope that it will be useful,
* 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
- * License along with FFmpeg; if not, write to the Free Software
+ * License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
+
+#include "libavutil/avstring.h"
#include "avformat.h"
#include <unistd.h>
+#include <strings.h>
+#include "internal.h"
#include "network.h"
+#include "http.h"
+#include "os_support.h"
+#include "httpauth.h"
+#include "url.h"
+#include "libavutil/opt.h"
-#include "base64.h"
-
-/* XXX: POST protocol is not completly implemented because ffmpeg use
- only a subset of it */
-
-//#define DEBUG
+/* XXX: POST protocol is not completely implemented because ffmpeg uses
+ only a subset of it. */
/* used for protocol handling */
#define BUFFER_SIZE 1024
-#define URL_SIZE 4096
#define MAX_REDIRECTS 8
typedef struct {
+ const AVClass *class;
URLContext *hd;
unsigned char buffer[BUFFER_SIZE], *buf_ptr, *buf_end;
int line_count;
int http_code;
- offset_t off, filesize;
- char location[URL_SIZE];
+ int64_t chunksize; /**< Used if "Transfer-Encoding: chunked" otherwise -1. */
+ int64_t off, filesize;
+ char location[MAX_URL_SIZE];
+ HTTPAuthState auth_state;
+ unsigned char headers[BUFFER_SIZE];
+ int willclose; /**< Set if the server correctly handles Connection: close and will close the connection after feeding us the content. */
} HTTPContext;
+#define OFFSET(x) offsetof(HTTPContext, x)
+static const AVOption options[] = {
+{"chunksize", "use chunked transfer-encoding for posts, -1 disables it, 0 enables it", OFFSET(chunksize), FF_OPT_TYPE_INT64, {.dbl = 0}, -1, 0 }, /* Default to 0, for chunked POSTs */
+{NULL}
+};
+static const AVClass httpcontext_class = {
+ .class_name = "HTTP",
+ .item_name = av_default_item_name,
+ .option = options,
+ .version = LIBAVUTIL_VERSION_INT,
+};
+
static int http_connect(URLContext *h, const char *path, const char *hoststr,
const char *auth, int *new_location);
-static int http_write(URLContext *h, uint8_t *buf, int size);
+void ff_http_set_headers(URLContext *h, const char *headers)
+{
+ HTTPContext *s = h->priv_data;
+ int len = strlen(headers);
+
+ if (len && strcmp("\r\n", headers + len - 2))
+ av_log(h, AV_LOG_ERROR, "No trailing CRLF found in HTTP header.\n");
+
+ av_strlcpy(s->headers, headers, sizeof(s->headers));
+}
+
+void ff_http_set_chunked_transfer_encoding(URLContext *h, int is_chunked)
+{
+ ((HTTPContext*)h->priv_data)->chunksize = is_chunked ? 0 : -1;
+}
+
+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));
+}
/* return non zero if error */
static int http_open_cnx(URLContext *h)
char path1[1024];
char buf[1024];
int port, use_proxy, err, location_changed = 0, redirects = 0;
+ HTTPAuthType cur_auth_type;
HTTPContext *s = h->priv_data;
URLContext *hd = NULL;
proxy_path = getenv("http_proxy");
use_proxy = (proxy_path != NULL) && !getenv("no_proxy") &&
- strstart(proxy_path, "http://", NULL);
+ av_strstart(proxy_path, "http://", NULL);
/* fill the dest addr */
redo:
/* needed in any case to build the host string */
- url_split(NULL, 0, auth, sizeof(auth), hostname, sizeof(hostname), &port,
- path1, sizeof(path1), s->location);
- if (port > 0) {
- snprintf(hoststr, sizeof(hoststr), "%s:%d", hostname, port);
- } else {
- pstrcpy(hoststr, sizeof(hoststr), hostname);
- }
+ av_url_split(NULL, 0, auth, sizeof(auth), hostname, sizeof(hostname), &port,
+ path1, sizeof(path1), s->location);
+ ff_url_join(hoststr, sizeof(hoststr), NULL, NULL, hostname, port, NULL);
if (use_proxy) {
- url_split(NULL, 0, auth, sizeof(auth), hostname, sizeof(hostname), &port,
- NULL, 0, proxy_path);
+ av_url_split(NULL, 0, auth, sizeof(auth), hostname, sizeof(hostname), &port,
+ NULL, 0, proxy_path);
path = s->location;
} else {
if (path1[0] == '\0')
if (port < 0)
port = 80;
- snprintf(buf, sizeof(buf), "tcp://%s:%d", hostname, port);
- err = url_open(&hd, buf, URL_RDWR);
+ ff_url_join(buf, sizeof(buf), "tcp", NULL, hostname, port, NULL);
+ err = ffurl_open(&hd, buf, AVIO_FLAG_READ_WRITE);
if (err < 0)
goto fail;
s->hd = hd;
+ cur_auth_type = s->auth_state.auth_type;
if (http_connect(h, path, hoststr, auth, &location_changed) < 0)
goto fail;
- if ((s->http_code == 302 || s->http_code == 303) && location_changed == 1) {
+ if (s->http_code == 401) {
+ if (cur_auth_type == HTTP_AUTH_NONE && s->auth_state.auth_type != HTTP_AUTH_NONE) {
+ ffurl_close(hd);
+ goto redo;
+ } else
+ goto fail;
+ }
+ if ((s->http_code == 301 || s->http_code == 302 || s->http_code == 303 || s->http_code == 307)
+ && location_changed == 1) {
/* url moved, get next */
- url_close(hd);
+ ffurl_close(hd);
if (redirects++ >= MAX_REDIRECTS)
- return AVERROR_IO;
+ return AVERROR(EIO);
location_changed = 0;
goto redo;
}
return 0;
fail:
if (hd)
- url_close(hd);
- return AVERROR_IO;
+ ffurl_close(hd);
+ s->hd = NULL;
+ return AVERROR(EIO);
}
static int http_open(URLContext *h, const char *uri, int flags)
{
- HTTPContext *s;
- int ret;
+ HTTPContext *s = h->priv_data;
h->is_streamed = 1;
- s = av_malloc(sizeof(HTTPContext));
- if (!s) {
- return AVERROR(ENOMEM);
- }
- h->priv_data = s;
s->filesize = -1;
- s->off = 0;
- pstrcpy (s->location, URL_SIZE, uri);
+ av_strlcpy(s->location, uri, sizeof(s->location));
- ret = http_open_cnx(h);
- if (ret != 0)
- av_free (s);
- return ret;
+ return http_open_cnx(h);
}
static int http_getc(HTTPContext *s)
{
int len;
if (s->buf_ptr >= s->buf_end) {
- len = url_read(s->hd, s->buffer, BUFFER_SIZE);
+ len = ffurl_read(s->hd, s->buffer, BUFFER_SIZE);
if (len < 0) {
- return AVERROR_IO;
+ return AVERROR(EIO);
} else if (len == 0) {
return -1;
} else {
return *s->buf_ptr++;
}
+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)
+ return AVERROR(EIO);
+ 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;
+ }
+ }
+}
+
static int process_line(URLContext *h, char *line, int line_count,
int *new_location)
{
HTTPContext *s = h->priv_data;
- char *tag, *p;
+ char *tag, *p, *end;
/* end of header */
if (line[0] == '\0')
p++;
while (isspace(*p))
p++;
- s->http_code = strtol(p, NULL, 10);
-#ifdef DEBUG
- printf("http_code=%d\n", s->http_code);
-#endif
- /* error codes are 4xx and 5xx */
- if (s->http_code >= 400 && s->http_code < 600)
+ s->http_code = strtol(p, &end, 10);
+
+ av_dlog(NULL, "http_code=%d\n", s->http_code);
+
+ /* error codes are 4xx and 5xx, but regard 401 as a success, so we
+ * don't abort until all headers have been parsed. */
+ if (s->http_code >= 400 && s->http_code < 600 && s->http_code != 401) {
+ end += strspn(end, SPACE_CHARS);
+ av_log(h, AV_LOG_WARNING, "HTTP error %d %s\n",
+ s->http_code, end);
return -1;
+ }
} else {
while (*p != '\0' && *p != ':')
p++;
p++;
while (isspace(*p))
p++;
- if (!strcmp(tag, "Location")) {
+ if (!strcasecmp(tag, "Location")) {
strcpy(s->location, p);
*new_location = 1;
- } else if (!strcmp (tag, "Content-Length") && s->filesize == -1) {
+ } else if (!strcasecmp (tag, "Content-Length") && s->filesize == -1) {
s->filesize = atoll(p);
- } else if (!strcmp (tag, "Content-Range")) {
+ } else if (!strcasecmp (tag, "Content-Range")) {
/* "bytes $from-$to/$document_size" */
const char *slash;
if (!strncmp (p, "bytes ", 6)) {
s->filesize = atoll(slash+1);
}
h->is_streamed = 0; /* we _can_ in fact seek */
+ } else if (!strcasecmp (tag, "Transfer-Encoding") && !strncasecmp(p, "chunked", 7)) {
+ s->filesize = -1;
+ s->chunksize = 0;
+ } else if (!strcasecmp (tag, "WWW-Authenticate")) {
+ ff_http_auth_handle_header(&s->auth_state, tag, p);
+ } else if (!strcasecmp (tag, "Authentication-Info")) {
+ ff_http_auth_handle_header(&s->auth_state, tag, p);
+ } else if (!strcasecmp (tag, "Connection")) {
+ if (!strcmp(p, "close"))
+ s->willclose = 1;
}
}
return 1;
}
+static inline int has_header(const char *str, const char *header)
+{
+ /* header + 2 to skip over CRLF prefix. (make sure you have one!) */
+ return av_stristart(str, header + 2, NULL) || av_stristr(str, header);
+}
+
static int http_connect(URLContext *h, const char *path, const char *hoststr,
const char *auth, int *new_location)
{
HTTPContext *s = h->priv_data;
- int post, err, ch;
- char line[1024], *q;
- char *auth_b64;
- int auth_b64_len = strlen(auth)* 4 / 3 + 12;
- offset_t off = s->off;
+ int post, err;
+ char line[1024];
+ char headers[1024] = "";
+ char *authstr = NULL;
+ int64_t off = s->off;
+ int len = 0;
/* send http header */
- post = h->flags & URL_WRONLY;
- auth_b64 = av_malloc(auth_b64_len);
- av_base64_encode(auth_b64, auth_b64_len, (uint8_t *)auth, strlen(auth));
+ post = h->flags & AVIO_FLAG_WRITE;
+ authstr = ff_http_auth_create_response(&s->auth_state, auth, path,
+ post ? "POST" : "GET");
+
+ /* 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);
+ if (!has_header(s->headers, "\r\nRange: "))
+ len += av_strlcatf(headers + len, sizeof(headers) - len,
+ "Range: bytes=%"PRId64"-\r\n", s->off);
+ if (!has_header(s->headers, "\r\nConnection: "))
+ len += av_strlcpy(headers + len, "Connection: close\r\n",
+ sizeof(headers)-len);
+ if (!has_header(s->headers, "\r\nHost: "))
+ len += av_strlcatf(headers + len, sizeof(headers) - len,
+ "Host: %s\r\n", hoststr);
+
+ /* now add in custom headers */
+ av_strlcpy(headers+len, s->headers, sizeof(headers)-len);
+
snprintf(s->buffer, sizeof(s->buffer),
"%s %s HTTP/1.1\r\n"
- "User-Agent: %s\r\n"
- "Accept: */*\r\n"
- "Range: bytes=%"PRId64"-\r\n"
- "Host: %s\r\n"
- "Authorization: Basic %s\r\n"
- "Connection: close\r\n"
+ "%s"
+ "%s"
+ "%s"
"\r\n",
post ? "POST" : "GET",
path,
- LIBAVFORMAT_IDENT,
- s->off,
- hoststr,
- auth_b64);
+ post && s->chunksize >= 0 ? "Transfer-Encoding: chunked\r\n" : "",
+ headers,
+ authstr ? authstr : "");
- av_freep(&auth_b64);
- if (http_write(h, s->buffer, strlen(s->buffer)) < 0)
- return AVERROR_IO;
+ av_freep(&authstr);
+ if (ffurl_write(s->hd, s->buffer, strlen(s->buffer)) < 0)
+ return AVERROR(EIO);
/* init input buffer */
s->buf_ptr = s->buffer;
s->line_count = 0;
s->off = 0;
s->filesize = -1;
+ s->willclose = 0;
if (post) {
- sleep(1);
+ /* 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;
return 0;
}
+ s->chunksize = -1;
/* wait for header */
- q = line;
for(;;) {
- ch = http_getc(s);
- if (ch < 0)
- return AVERROR_IO;
- if (ch == '\n') {
- /* process line */
- if (q > line && q[-1] == '\r')
- q--;
- *q = '\0';
-#ifdef DEBUG
- printf("header='%s'\n", line);
-#endif
- err = process_line(h, line, s->line_count, new_location);
- if (err < 0)
- return err;
- if (err == 0)
- break;
- s->line_count++;
- q = line;
- } else {
- if ((q - line) < sizeof(line) - 1)
- *q++ = ch;
- }
+ if (http_get_line(s, line, sizeof(line)) < 0)
+ return AVERROR(EIO);
+
+ 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 (off == s->off) ? 0 : -1;
HTTPContext *s = h->priv_data;
int len;
+ if (s->chunksize >= 0) {
+ if (!s->chunksize) {
+ char line[32];
+
+ for(;;) {
+ do {
+ if (http_get_line(s, line, sizeof(line)) < 0)
+ return AVERROR(EIO);
+ } while (!*line); /* skip CR LF from last chunk */
+
+ s->chunksize = strtoll(line, NULL, 16);
+
+ av_dlog(NULL, "Chunked encoding data size: %"PRId64"'\n", s->chunksize);
+
+ if (!s->chunksize)
+ return 0;
+ break;
+ }
+ }
+ size = FFMIN(size, s->chunksize);
+ }
/* read bytes from input buffer first */
len = s->buf_end - s->buf_ptr;
if (len > 0) {
memcpy(buf, s->buf_ptr, len);
s->buf_ptr += len;
} else {
- len = url_read(s->hd, buf, size);
+ if (!s->willclose && s->filesize >= 0 && s->off >= s->filesize)
+ return AVERROR_EOF;
+ len = ffurl_read(s->hd, buf, size);
}
- if (len > 0)
+ if (len > 0) {
s->off += len;
+ if (s->chunksize > 0)
+ s->chunksize -= len;
+ }
return len;
}
/* used only when posting data */
-static int http_write(URLContext *h, uint8_t *buf, int size)
+static int http_write(URLContext *h, const uint8_t *buf, int size)
{
+ char temp[11] = ""; /* 32-bit hex + CRLF + nul */
+ int ret;
+ char crlf[] = "\r\n";
HTTPContext *s = h->priv_data;
- return url_write(s->hd, buf, size);
+
+ if (s->chunksize == -1) {
+ /* non-chunked data is sent without any special encoding */
+ return ffurl_write(s->hd, buf, size);
+ }
+
+ /* silently ignore zero-size data since chunk encoding that would
+ * signal EOF */
+ if (size > 0) {
+ /* upload data using chunked encoding */
+ snprintf(temp, sizeof(temp), "%x\r\n", size);
+
+ 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)
+ return ret;
+ }
+ return size;
}
static int http_close(URLContext *h)
{
+ int ret = 0;
+ char footer[] = "0\r\n\r\n";
HTTPContext *s = h->priv_data;
- url_close(s->hd);
- av_free(s);
- return 0;
+
+ /* signal end of chunked encoding if used */
+ if ((h->flags & AVIO_FLAG_WRITE) && s->chunksize != -1) {
+ ret = ffurl_write(s->hd, footer, sizeof(footer) - 1);
+ ret = ret > 0 ? 0 : ret;
+ }
+
+ if (s->hd)
+ ffurl_close(s->hd);
+ return ret;
}
-static offset_t http_seek(URLContext *h, offset_t off, int whence)
+static int64_t http_seek(URLContext *h, int64_t off, int whence)
{
HTTPContext *s = h->priv_data;
URLContext *old_hd = s->hd;
- offset_t old_off = s->off;
+ int64_t old_off = s->off;
+ uint8_t old_buf[BUFFER_SIZE];
+ int old_buf_size;
if (whence == AVSEEK_SIZE)
return s->filesize;
return -1;
/* we save the old context in case the seek fails */
+ old_buf_size = s->buf_end - s->buf_ptr;
+ memcpy(old_buf, s->buf_ptr, old_buf_size);
s->hd = NULL;
if (whence == SEEK_CUR)
off += s->off;
/* if it fails, continue on old connection */
if (http_open_cnx(h) < 0) {
+ memcpy(s->buffer, old_buf, old_buf_size);
+ s->buf_ptr = s->buffer;
+ s->buf_end = s->buffer + old_buf_size;
s->hd = old_hd;
s->off = old_off;
return -1;
}
- url_close(old_hd);
+ ffurl_close(old_hd);
return off;
}
-URLProtocol http_protocol = {
- "http",
- http_open,
- http_read,
- http_write,
- http_seek,
- http_close,
+static int
+http_get_file_handle(URLContext *h)
+{
+ HTTPContext *s = h->priv_data;
+ return ffurl_get_file_handle(s->hd);
+}
+
+URLProtocol ff_http_protocol = {
+ .name = "http",
+ .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,
+ .priv_data_size = sizeof(HTTPContext),
+ .priv_data_class = &httpcontext_class,
};
projects / ffmpeg / blobdiff