X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;ds=sidebyside;f=libavformat%2Fhttp.c;h=948930a053d765cf462a39d265ff7df06d93f8ae;hb=25b6837f7cacd691b19cbc12b9dad1ce84a318a1;hp=344507ef8dd70d1e3dd59adc35d9d62ced722bca;hpb=708b32b6f72c58ec1bf5fed6a227b3e48b971a05;p=ffmpeg

diff --git a/libavformat/http.c b/libavformat/http.c
index 344507ef8dd..948930a053d 100644
--- a/libavformat/http.c
+++ b/libavformat/http.c
@@ -49,19 +49,35 @@ typedef struct {
     unsigned char buffer[BUFFER_SIZE], *buf_ptr, *buf_end;
     int line_count;
     int http_code;
-    int64_t chunksize;      /**< Used if "Transfer-Encoding: chunked" otherwise -1. */
-    int64_t off, filesize;
-    char location[MAX_URL_SIZE];
+    /* Used if "Transfer-Encoding: chunked" otherwise -1. */
+    int64_t chunksize;
+    int64_t off, end_off, filesize;
+    char *location;
     HTTPAuthState auth_state;
     HTTPAuthState proxy_auth_state;
     char *headers;
-    int willclose;          /**< Set if the server correctly handles Connection: close and will close the connection after feeding us the content. */
+    char *mime_type;
+    char *user_agent;
+    char *content_type;
+    /* Set if the server correctly handles Connection: close and will close
+     * the connection after feeding us the content. */
+    int willclose;
     int chunked_post;
-    int end_chunked_post;   /**< A flag which indicates if the end of chunked encoding has been sent. */
-    int end_header;         /**< A flag which indicates we have finished to read POST reply. */
-    int multiple_requests;  /**< A flag which indicates if we use persistent connections. */
+    /* A flag which indicates if the end of chunked encoding has been sent. */
+    int end_chunked_post;
+    /* A flag which indicates we have finished to read POST reply. */
+    int end_header;
+    /* A flag which indicates if we use persistent connections. */
+    int multiple_requests;
     uint8_t *post_data;
     int post_datalen;
+    int icy;
+    /* how much data was read since the last ICY metadata packet */
+    int icy_data_read;
+    /* after how many bytes of read data a new metadata packet will be found */
+    int icy_metaint;
+    char *icy_metadata_headers;
+    char *icy_metadata_packet;
 #if CONFIG_ZLIB
     int compressed;
     z_stream inflate_stream;
@@ -74,15 +90,26 @@ typedef struct {
 #define OFFSET(x) offsetof(HTTPContext, x)
 #define D AV_OPT_FLAG_DECODING_PARAM
 #define E AV_OPT_FLAG_ENCODING_PARAM
+#define DEFAULT_USER_AGENT "Lavf/" AV_STRINGIFY(LIBAVFORMAT_VERSION)
 static const AVOption options[] = {
 {"chunked_post", "use chunked transfer-encoding for posts", OFFSET(chunked_post), AV_OPT_TYPE_INT, {.i64 = 1}, 0, 1, E },
-{"headers", "custom HTTP headers, can override built in default headers", OFFSET(headers), AV_OPT_TYPE_STRING, { 0 }, 0, 0, D|E },
+{"headers", "set custom HTTP headers, can override built in default headers", OFFSET(headers), AV_OPT_TYPE_STRING, { 0 }, 0, 0, D|E },
+{"content_type", "set a specific content type for the POST messages", OFFSET(content_type), AV_OPT_TYPE_STRING, { 0 }, 0, 0, D|E },
+{"user_agent", "override User-Agent header", OFFSET(user_agent), AV_OPT_TYPE_STRING, {.str = DEFAULT_USER_AGENT}, 0, 0, D },
+{"user-agent", "override User-Agent header, for compatibility with ffmpeg", OFFSET(user_agent), AV_OPT_TYPE_STRING, {.str = DEFAULT_USER_AGENT}, 0, 0, D },
 {"multiple_requests", "use persistent connections", OFFSET(multiple_requests), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1, D|E },
-{"post_data", "custom HTTP post data", OFFSET(post_data), AV_OPT_TYPE_BINARY, .flags = D|E },
+{"post_data", "set custom HTTP post data", OFFSET(post_data), AV_OPT_TYPE_BINARY, .flags = D|E },
+{"mime_type", "export the MIME type", OFFSET(mime_type), AV_OPT_TYPE_STRING, {0}, 0, 0, AV_OPT_FLAG_EXPORT | AV_OPT_FLAG_READONLY  },
+{"icy", "request ICY metadata", OFFSET(icy), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1, D },
+{"icy_metadata_headers", "return ICY metadata headers", OFFSET(icy_metadata_headers), AV_OPT_TYPE_STRING, {0}, 0, 0, AV_OPT_FLAG_EXPORT },
+{"icy_metadata_packet", "return current ICY metadata packet", OFFSET(icy_metadata_packet), AV_OPT_TYPE_STRING, {0}, 0, 0, AV_OPT_FLAG_EXPORT },
 {"auth_type", "HTTP authentication type", OFFSET(auth_state.auth_type), AV_OPT_TYPE_INT, {.i64 = HTTP_AUTH_NONE}, HTTP_AUTH_NONE, HTTP_AUTH_BASIC, D|E, "auth_type" },
 {"none", "No auth method set, autodetect", 0, AV_OPT_TYPE_CONST, {.i64 = HTTP_AUTH_NONE}, 0, 0, D|E, "auth_type" },
 {"basic", "HTTP basic authentication", 0, AV_OPT_TYPE_CONST, {.i64 = HTTP_AUTH_BASIC}, 0, 0, D|E, "auth_type" },
-{"send_expect_100", "Force sending an Expect: 100-continue header for POST", OFFSET(send_expect_100), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1, E, "auth_type" },
+{"send_expect_100", "Force sending an Expect: 100-continue header for POST", OFFSET(send_expect_100), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1, E },
+{"location", "The actual location of the data received", OFFSET(location), AV_OPT_TYPE_STRING, { 0 }, 0, 0, D|E },
+{"offset", "initial byte offset", OFFSET(off), AV_OPT_TYPE_INT64, {.i64 = 0}, 0, INT64_MAX, D },
+{"end_offset", "try to limit the request to bytes preceding this offset", OFFSET(end_off), AV_OPT_TYPE_INT64, {.i64 = 0}, 0, INT64_MAX, D },
 {NULL}
 };
 #define HTTP_CLASS(flavor)\
@@ -218,7 +245,11 @@ int ff_http_do_new_request(URLContext *h, const char *uri)
     int ret;
 
     s->off = 0;
-    av_strlcpy(s->location, uri, sizeof(s->location));
+    s->icy_data_read = 0;
+    av_free(s->location);
+    s->location = av_strdup(uri);
+    if (!s->location)
+        return AVERROR(ENOMEM);
 
     av_dict_copy(&options, s->chained_options, 0);
     ret = http_open_cnx(h, &options);
@@ -235,7 +266,9 @@ static int http_open(URLContext *h, const char *uri, int flags,
     h->is_streamed = 1;
 
     s->filesize = -1;
-    av_strlcpy(s->location, uri, sizeof(s->location));
+    s->location = av_strdup(uri);
+    if (!s->location)
+        return AVERROR(ENOMEM);
     if (options)
         av_dict_copy(&s->chained_options, *options, 0);
 
@@ -258,7 +291,7 @@ static int http_getc(HTTPContext *s)
         if (len < 0) {
             return len;
         } else if (len == 0) {
-            return -1;
+            return AVERROR_EOF;
         } else {
             s->buf_ptr = s->buffer;
             s->buf_end = s->buffer + len;
@@ -291,11 +324,110 @@ static int http_get_line(HTTPContext *s, char *line, int line_size)
     }
 }
 
+static int check_http_code(URLContext *h, int http_code, const char *end)
+{
+    HTTPContext *s = h->priv_data;
+    /* error codes are 4xx and 5xx, but regard 401 as a success, so we
+     * don't abort until all headers have been parsed. */
+    if (http_code >= 400 && http_code < 600 &&
+        (http_code != 401 || s->auth_state.auth_type != HTTP_AUTH_NONE) &&
+        (http_code != 407 || s->proxy_auth_state.auth_type != HTTP_AUTH_NONE)) {
+        end += strspn(end, SPACE_CHARS);
+        av_log(h, AV_LOG_WARNING, "HTTP error %d %s\n", http_code, end);
+        return AVERROR(EIO);
+    }
+    return 0;
+}
+
+static int parse_location(HTTPContext *s, const char *p)
+{
+    char redirected_location[MAX_URL_SIZE], *new_loc;
+    ff_make_absolute_url(redirected_location, sizeof(redirected_location),
+                         s->location, p);
+    new_loc = av_strdup(redirected_location);
+    if (!new_loc)
+        return AVERROR(ENOMEM);
+    av_free(s->location);
+    s->location = new_loc;
+    return 0;
+}
+
+/* "bytes $from-$to/$document_size" */
+static void parse_content_range(URLContext *h, const char *p)
+{
+    HTTPContext *s = h->priv_data;
+    const char *slash;
+
+    if (!strncmp(p, "bytes ", 6)) {
+        p += 6;
+        s->off = strtoll(p, NULL, 10);
+        if ((slash = strchr(p, '/')) && strlen(slash) > 0)
+            s->filesize = strtoll(slash+1, NULL, 10);
+    }
+    h->is_streamed = 0; /* we _can_ in fact seek */
+}
+
+static int parse_content_encoding(URLContext *h, const char *p)
+{
+    HTTPContext *s = h->priv_data;
+
+    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);
+    }
+    return 0;
+}
+
+// Concat all Icy- header lines
+static int parse_icy(HTTPContext *s, const char *tag, const char *p)
+{
+    int len = 4 + strlen(p) + strlen(tag);
+    int is_first = !s->icy_metadata_headers;
+    int ret;
+
+    if (s->icy_metadata_headers)
+        len += strlen(s->icy_metadata_headers);
+
+    if ((ret = av_reallocp(&s->icy_metadata_headers, len)) < 0)
+        return ret;
+
+    if (is_first)
+        *s->icy_metadata_headers = '\0';
+
+    av_strlcatf(s->icy_metadata_headers, len, "%s: %s\n", tag, p);
+
+    return 0;
+}
+
 static int process_line(URLContext *h, char *line, int line_count,
                         int *new_location)
 {
     HTTPContext *s = h->priv_data;
     char *tag, *p, *end;
+    int ret;
 
     /* end of header */
     if (line[0] == '\0') {
@@ -313,16 +445,8 @@ static int process_line(URLContext *h, char *line, int line_count,
 
         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
-            || s->auth_state.auth_type != HTTP_AUTH_NONE) &&
-            (s->http_code != 407 || s->proxy_auth_state.auth_type != HTTP_AUTH_NONE)) {
-            end += strspn(end, SPACE_CHARS);
-            av_log(h, AV_LOG_WARNING, "HTTP error %d %s\n",
-                   s->http_code, end);
-            return -1;
-        }
+        if ((ret = check_http_code(h, s->http_code, end)) < 0)
+            return ret;
     } else {
         while (*p != '\0' && *p != ':')
             p++;
@@ -335,59 +459,40 @@ static int process_line(URLContext *h, char *line, int line_count,
         while (av_isspace(*p))
             p++;
         if (!av_strcasecmp(tag, "Location")) {
-            av_strlcpy(s->location, p, sizeof(s->location));
+            if ((ret = parse_location(s, p)) < 0)
+                return ret;
             *new_location = 1;
-        } else if (!av_strcasecmp (tag, "Content-Length") && s->filesize == -1) {
+        } else if (!av_strcasecmp(tag, "Content-Length") && s->filesize == -1) {
             s->filesize = strtoll(p, NULL, 10);
-        } else if (!av_strcasecmp (tag, "Content-Range")) {
-            /* "bytes $from-$to/$document_size" */
-            const char *slash;
-            if (!strncmp (p, "bytes ", 6)) {
-                p += 6;
-                s->off = strtoll(p, NULL, 10);
-                if ((slash = strchr(p, '/')) && strlen(slash) > 0)
-                    s->filesize = strtoll(slash+1, NULL, 10);
-            }
-            h->is_streamed = 0; /* we _can_ in fact seek */
-        } else if (!av_strcasecmp(tag, "Accept-Ranges") && !strncmp(p, "bytes", 5)) {
+        } else if (!av_strcasecmp(tag, "Content-Range")) {
+            parse_content_range(h, p);
+        } else if (!av_strcasecmp(tag, "Accept-Ranges") &&
+                   !strncmp(p, "bytes", 5)) {
             h->is_streamed = 0;
-        } else if (!av_strcasecmp (tag, "Transfer-Encoding") && !av_strncasecmp(p, "chunked", 7)) {
+        } else if (!av_strcasecmp(tag, "Transfer-Encoding") &&
+                   !av_strncasecmp(p, "chunked", 7)) {
             s->filesize = -1;
             s->chunksize = 0;
-        } else if (!av_strcasecmp (tag, "WWW-Authenticate")) {
+        } else if (!av_strcasecmp(tag, "WWW-Authenticate")) {
             ff_http_auth_handle_header(&s->auth_state, tag, p);
-        } else if (!av_strcasecmp (tag, "Authentication-Info")) {
+        } else if (!av_strcasecmp(tag, "Authentication-Info")) {
             ff_http_auth_handle_header(&s->auth_state, tag, p);
-        } else if (!av_strcasecmp (tag, "Proxy-Authenticate")) {
+        } else if (!av_strcasecmp(tag, "Proxy-Authenticate")) {
             ff_http_auth_handle_header(&s->proxy_auth_state, tag, p);
-        } else if (!av_strcasecmp (tag, "Connection")) {
+        } else if (!av_strcasecmp(tag, "Connection")) {
             if (!strcmp(p, "close"))
                 s->willclose = 1;
-        } 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);
-            }
+        } else if (!av_strcasecmp (tag, "Content-Type")) {
+            av_free(s->mime_type);
+            s->mime_type = av_strdup(p);
+        } else if (!av_strcasecmp (tag, "Icy-MetaInt")) {
+            s->icy_metaint = strtoll(p, NULL, 10);
+        } else if (!av_strncasecmp(tag, "Icy-", 4)) {
+            if ((ret = parse_icy(s, tag, p)) < 0)
+                return ret;
+        } else if (!av_strcasecmp(tag, "Content-Encoding")) {
+            if ((ret = parse_content_encoding(h, p)) < 0)
+                return ret;
         }
     }
     return 1;
@@ -469,14 +574,23 @@ static int http_connect(URLContext *h, const char *path, const char *local_path,
 
     /* 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);
+        len += av_strlcatf(headers + len, sizeof(headers) - len,
+                           "User-Agent: %s\r\n", s->user_agent);
     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: ") && !post)
+    // Note: we send this on purpose even when s->off is 0 when we're probing,
+    // since it allows us to detect more reliably if a (non-conforming)
+    // server supports seeking by analysing the reply headers.
+    if (!has_header(s->headers, "\r\nRange: ") && !post) {
         len += av_strlcatf(headers + len, sizeof(headers) - len,
-                           "Range: bytes=%"PRId64"-\r\n", s->off);
+                           "Range: bytes=%"PRId64"-", s->off);
+        if (s->end_off)
+            len += av_strlcatf(headers + len, sizeof(headers) - len,
+                               "%"PRId64, s->end_off - 1);
+        len += av_strlcpy(headers + len, "\r\n",
+                          sizeof(headers) - len);
+    }
     if (send_expect_100 && !has_header(s->headers, "\r\nExpect: "))
         len += av_strlcatf(headers + len, sizeof(headers) - len,
                            "Expect: 100-continue\r\n");
@@ -498,6 +612,14 @@ static int http_connect(URLContext *h, const char *path, const char *local_path,
         len += av_strlcatf(headers + len, sizeof(headers) - len,
                            "Content-Length: %d\r\n", s->post_datalen);
 
+    if (!has_header(s->headers, "\r\nContent-Type: ") && s->content_type)
+        len += av_strlcatf(headers + len, sizeof(headers) - len,
+                           "Content-Type: %s\r\n", s->content_type);
+    if (!has_header(s->headers, "\r\nIcy-MetaData: ") && s->icy) {
+        len += av_strlcatf(headers + len, sizeof(headers) - len,
+                           "Icy-MetaData: %d\r\n", 1);
+    }
+
     /* now add in custom headers */
     if (s->headers)
         av_strlcpy(headers + len, s->headers, sizeof(headers) - len);
@@ -530,6 +652,7 @@ static int http_connect(URLContext *h, const char *path, const char *local_path,
     s->buf_end = s->buffer;
     s->line_count = 0;
     s->off = 0;
+    s->icy_data_read = 0;
     s->filesize = -1;
     s->willclose = 0;
     s->end_chunked_post = 0;
@@ -607,7 +730,7 @@ static int http_buf_read_compressed(URLContext *h, uint8_t *buf, int size)
 }
 #endif
 
-static int http_read(URLContext *h, uint8_t *buf, int size)
+static int http_read_stream(URLContext *h, uint8_t *buf, int size)
 {
     HTTPContext *s = h->priv_data;
     int err, new_location;
@@ -649,6 +772,70 @@ static int http_read(URLContext *h, uint8_t *buf, int size)
     return http_buf_read(h, buf, size);
 }
 
+static int http_read_stream_all(URLContext *h, uint8_t *buf, int size)
+{
+    int pos = 0;
+    while (pos < size) {
+        int len = http_read_stream(h, buf + pos, size - pos);
+        if (len < 0)
+            return len;
+        pos += len;
+    }
+    return pos;
+}
+
+static int store_icy(URLContext *h, int size)
+{
+    HTTPContext *s = h->priv_data;
+    /* until next metadata packet */
+    int remaining = s->icy_metaint - s->icy_data_read;
+
+    if (remaining < 0)
+        return AVERROR_INVALIDDATA;
+
+    if (!remaining) {
+        // The metadata packet is variable sized. It has a 1 byte header
+        // which sets the length of the packet (divided by 16). If it's 0,
+        // the metadata doesn't change. After the packet, icy_metaint bytes
+        // of normal data follow.
+        uint8_t ch;
+        int len = http_read_stream_all(h, &ch, 1);
+        if (len < 0)
+            return len;
+        if (ch > 0) {
+            char data[255 * 16 + 1];
+            int ret;
+            len = ch * 16;
+            ret = http_read_stream_all(h, data, len);
+            if (ret < 0)
+                return ret;
+            data[len + 1] = 0;
+            if ((ret = av_opt_set(s, "icy_metadata_packet", data, 0)) < 0)
+                return ret;
+        }
+        s->icy_data_read = 0;
+        remaining = s->icy_metaint;
+    }
+
+    return FFMIN(size, remaining);
+}
+
+static int http_read(URLContext *h, uint8_t *buf, int size)
+{
+    HTTPContext *s = h->priv_data;
+
+    if (s->icy_metaint > 0) {
+        size = store_icy(h, size);
+        if (size < 0)
+            return size;
+    }
+
+    size = http_read_stream(h, buf, size);
+    if (size > 0)
+        s->icy_data_read += size;
+    return size;
+}
+
 /* used only when posting data */
 static int http_write(URLContext *h, const uint8_t *buf, int size)
 {
@@ -719,13 +906,16 @@ static int64_t http_seek(URLContext *h, int64_t off, int whence)
     URLContext *old_hd = s->hd;
     int64_t old_off = s->off;
     uint8_t old_buf[BUFFER_SIZE];
-    int old_buf_size;
+    int old_buf_size, ret;
     AVDictionary *options = NULL;
 
     if (whence == AVSEEK_SIZE)
         return s->filesize;
+    else if ((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 -1;
+        return AVERROR(ENOSYS);
 
     /* we save the old context in case the seek fails */
     old_buf_size = s->buf_end - s->buf_ptr;
@@ -739,14 +929,14 @@ static int64_t http_seek(URLContext *h, int64_t off, int whence)
 
     /* if it fails, continue on old connection */
     av_dict_copy(&options, s->chained_options, 0);
-    if (http_open_cnx(h, &options) < 0) {
+    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 -1;
+        return ret;
     }
     av_dict_free(&options);
     ffurl_close(old_hd);