static int64_t http_seek(URLContext *h, int64_t off, int whence)
{
HTTPContext *s = h->priv_data;
URLContext *old_hd = s->hd;
int64_t old_off = s->off;
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 */
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) {
s->hd = old_hd;
s->off = old_off;
return -1;
}
url_close(old_hd);
return off;
}
static int64_t http_seek(URLContext *h, int64_t off, int whence)
{
HTTPContext *s = h->priv_data;
URLContext *old_hd = s->hd;
int64_t old_off = s->off;
uint8_t old_buf[BUFFER_SIZE];
int old_buf_size;
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 */
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;
else if (whence == SEEK_END)
off += s->filesize;
s->off = 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);
return off;
}
static int http_open(URLContext *h, const char *uri, int flags,
AVDictionary **options)
{
HTTPContext *s = h->priv_data;
int ret;
if( s->seekable == 1 )
h->is_streamed = 0;
else
h->is_streamed = 1;
s->filesize = -1;
s->location = av_strdup(uri);
if (!s->location)
return AVERROR(ENOMEM);
if (options)
av_dict_copy(&s->chained_options, *options, 0);
if (s->headers) {
int len = strlen(s->headers);
if (len < 2 || strcmp("\r\n", s->headers + len - 2))
av_log(h, AV_LOG_WARNING,
"No trailing CRLF found in HTTP header.\n");
}
if (s->listen) {
return http_listen(h, uri, flags, options);
}
ret = http_open_cnx(h, options);
if (ret < 0)
av_dict_free(&s->chained_options);
return ret;
}
static int http_read(URLContext *h, uint8_t *buf, int size)
{
HTTPContext *s = h->priv_data;
int len;
if (!s->init) {
int ret = http_open_cnx(h);
if (ret != 0)
return ret;
}
if (!s->hd)
return AVERROR(EIO);
/* A size of zero can be used to force
* initializaton of the connection. */
if (!size)
return 0;
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);
dprintf(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) {
if (len > size)
len = size;
memcpy(buf, s->buf_ptr, len);
s->buf_ptr += len;
} else {
len = url_read(s->hd, buf, size);
}
if (len > 0) {
s->off += len;
if (s->chunksize > 0)
s->chunksize -= len;
}
return len;
}
static int64_t http_seek_internal(URLContext *h, int64_t off, int whence, int force_reconnect)
{
HTTPContext *s = h->priv_data;
URLContext *old_hd = s->hd;
int64_t old_off = s->off;
uint8_t old_buf[BUFFER_SIZE];
int old_buf_size, ret;
AVDictionary *options = NULL;
if (whence == AVSEEK_SIZE)
return s->filesize;
else if (!force_reconnect &&
((whence == SEEK_CUR && off == 0) ||
(whence == SEEK_SET && off == s->off)))
return s->off;
else if ((s->filesize == -1 && whence == SEEK_END) || h->is_streamed)
return AVERROR(ENOSYS);
if (whence == SEEK_CUR)
off += s->off;
else if (whence == SEEK_END)
off += s->filesize;
else if (whence != SEEK_SET)
return AVERROR(EINVAL);
if (off < 0)
return AVERROR(EINVAL);
s->off = off;
/* 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 it fails, continue on old connection */
if ((ret = http_open_cnx(h, &options)) < 0) {
av_dict_free(&options);
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 ret;
}
av_dict_free(&options);
ffurl_close(old_hd);
return off;
}
int ff_http_do_new_request(URLContext *h, const char *uri)
{
HTTPContext *s = h->priv_data;
AVDictionary *options = NULL;
int ret;
s->off = 0;
s->icy_data_read = 0;
av_free(s->location);
s->location = av_strdup(uri);
if (!s->location)
return AVERROR(ENOMEM);
ret = http_open_cnx(h, &options);
av_dict_free(&options);
return ret;
}
static int http_open(URLContext *h, const char *uri, int flags)
{
HTTPContext *s;
int ret;
s = av_malloc(sizeof(HTTPContext));
if (!s) {
return AVERROR(ENOMEM);
}
h->priv_data = s;
s->filesize = -1;
s->chunksize = -1;
s->off = 0;
av_strlcpy(s->location, uri, URL_SIZE);
ret = http_open_cnx(h);
if (ret != 0)
av_free (s);
h->is_streamed = 1;/*make sure we are streamed*/
return ret;
}
/* used only when posting data */
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;
if (!s->init) {
int ret = http_open_cnx(h);
if (ret != 0)
return ret;
}
if (!s->hd)
return AVERROR(EIO);
if (s->chunksize == -1) {
/* headers are sent without any special encoding */
return url_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 */
if(s->is_chunked) {
snprintf(temp, sizeof(temp), "%x\r\n", size);
if ((ret = url_write(s->hd, temp, strlen(temp))) < 0)
return ret;
}
if ((ret = url_write(s->hd, buf, size)) < 0)
return ret;
if (s->is_chunked && (ret = url_write(s->hd, crlf, sizeof(crlf) - 1)) < 0)
return ret;
}
return size;
}