refine http request parse. 2.0.132.

@@ -550,7 +550,8 @@ Supported operating systems and hardware:
 ## History
 ## History
 
 
 ### SRS 2.0 history
 ### SRS 2.0 history
-.
+
+* v2.0, 2015-03-06, refine http request parse. 2.0.132.
 * v2.0, 2015-03-01, for [#179](https://github.com/winlinvip/simple-rtmp-server/issues/179), revert dvr http api. 2.0.128.
 * v2.0, 2015-03-01, for [#179](https://github.com/winlinvip/simple-rtmp-server/issues/179), revert dvr http api. 2.0.128.
 * v2.0, 2015-02-24, for [#304](https://github.com/winlinvip/simple-rtmp-server/issues/304), fix hls bug, write pts/dts error. 2.0.124
 * v2.0, 2015-02-24, for [#304](https://github.com/winlinvip/simple-rtmp-server/issues/304), fix hls bug, write pts/dts error. 2.0.124
 * v2.0, 2015-02-19, refine dvr, append file when dvr file exists. 2.0.122.
 * v2.0, 2015-02-19, refine dvr, append file when dvr file exists. 2.0.122.

@@ -39,6 +39,7 @@ using namespace std;
 #include <srs_rtmp_buffer.hpp>
 #include <srs_rtmp_buffer.hpp>
 #include <srs_kernel_file.hpp>
 #include <srs_kernel_file.hpp>
 #include <srs_core_autofree.hpp>
 #include <srs_core_autofree.hpp>
+#include <srs_rtmp_buffer.hpp>
 
 
 #define SRS_DEFAULT_HTTP_PORT 80
 #define SRS_DEFAULT_HTTP_PORT 80
 
 
@@ -846,57 +847,152 @@ SrsHttpResponseReader::SrsHttpResponseReader(SrsHttpMessage* msg, SrsStSocket* i
 {
 {
     skt = io;
     skt = io;
     owner = msg;
     owner = msg;
-    cache = new SrsSimpleBuffer();
+    is_eof = false;
+    nb_read = 0;
+    buffer = NULL;
 }
 }
 
 
 SrsHttpResponseReader::~SrsHttpResponseReader()
 SrsHttpResponseReader::~SrsHttpResponseReader()
 {
 {
-    srs_freep(cache);
 }
 }
 
 
-bool SrsHttpResponseReader::empty()
+int SrsHttpResponseReader::initialize(SrsFastBuffer* body)
 {
 {
-    return cache->length() == 0;
+    int ret = ERROR_SUCCESS;
+    
+    buffer = body;
+    
+    return ret;
 }
 }
 
 
-int SrsHttpResponseReader::append(char* data, int size)
+bool SrsHttpResponseReader::eof()
+{
+    return is_eof;
+}
+
+int SrsHttpResponseReader::read(std::string& data)
 {
 {
     int ret = ERROR_SUCCESS;
     int ret = ERROR_SUCCESS;
     
     
-    cache->append(data, size);
+    if (is_eof) {
+        ret = ERROR_HTTP_RESPONSE_EOF;
+        srs_error("http: response EOF. ret=%d", ret);
+        return ret;
+    }
+    
+    // chunked encoding.
+    if (owner->is_chunked()) {
+        return read_chunked(data);
+    }
     
     
+    // read by specified content-length
+    int max = (int)owner->content_length() - nb_read;
+    if (max <= 0) {
+        is_eof = true;
         return ret;
         return ret;
+    }
+    return read_specified(max, data);
 }
 }
 
 
-int SrsHttpResponseReader::read(int max, std::string& data)
+int SrsHttpResponseReader::read_chunked(std::string& data)
 {
 {
     int ret = ERROR_SUCCESS;
     int ret = ERROR_SUCCESS;
     
     
-    // TODO: FIXME: decode the chunked bytes.
+    // parse the chunk length first.
+    char* at = NULL;
+    int length = 0;
+    while (!at) {
+        // find the CRLF of chunk header end.
+        char* start = buffer->bytes();
+        char* end = start + buffer->size();
+        for (char* p = start; p < end - 1; p++) {
+            if (p[0] == __SRS_HTTP_CR && p[1] == __SRS_HTTP_LF) {
+                // invalid chunk, ignore.
+                if (p == start) {
+                    ret = ERROR_HTTP_INVALID_CHUNK_HEADER;
+                    srs_error("chunk header start with CRLF. ret=%d", ret);
+                    return ret;
+                }
+                length = p - start + 2;
+                at = buffer->read_slice(length);
+                break;
+            }
+        }
         
         
-    // read from cache first.
-    if (cache->length() > 0) {
-        int nb_bytes = srs_min(cache->length(), max);
-        data.append(cache->bytes(), nb_bytes);
-        cache->erase(nb_bytes);
+        // got at, ok.
+        if (at) {
+            break;
+        }
         
         
+        // when empty, only grow 1bytes, but the buffer will cache more.
+        if ((ret = buffer->grow(skt, buffer->size() + 1)) != ERROR_SUCCESS) {
+            if (!srs_is_client_gracefully_close(ret)) {
+                srs_error("read body from server failed. ret=%d", ret);
+            }
             return ret;
             return ret;
         }
         }
+    }
+    srs_assert(length >= 3);
     
     
-    // read some from underlayer.
-    int left = srs_max(SRS_HTTP_BODY_BUFFER, max);
+    // it's ok to set the pos and pos+1 to NULL.
+    at[length - 1] = NULL;
+    at[length - 2] = NULL;
     
     
-    // read from io.
-    char* buf = new char[left];
-    SrsAutoFree(char, buf);
+    // size is the bytes size, excludes the chunk header and end CRLF.
+    int ilength = ::strtol(at, NULL, 16);
+    if (ilength < 0) {
+        ret = ERROR_HTTP_INVALID_CHUNK_HEADER;
+        srs_error("chunk header negative, length=%d. ret=%d", ilength, ret);
+        return ret;
+    }
     
     
-    ssize_t nread = 0;
-    if ((ret = skt->read(buf, left, &nread)) != ERROR_SUCCESS) {
+    // when empty, only grow 1bytes, but the buffer will cache more.
+    if ((ret = buffer->grow(skt, ilength + 2)) != ERROR_SUCCESS) {
+        if (!srs_is_client_gracefully_close(ret)) {
+            srs_error("read body from server failed. ret=%d", ret);
+        }
         return ret;
         return ret;
     }
     }
+    srs_trace("http: read %d chunk", ilength);
     
     
-    if (nread) {
-        data.append(buf, nread);
+    // read payload when length specifies some payload.
+    if (ilength <= 0) {
+        is_eof = true;
+    } else {
+        srs_assert(ilength);
+        data.append(buffer->read_slice(ilength), ilength);
+        nb_read += ilength;
+    }
+    
+    // the CRLF of chunk payload end.
+    buffer->read_slice(2);
+
+    return ret;
+}
+
+int SrsHttpResponseReader::read_specified(int max, std::string& data)
+{
+    int ret = ERROR_SUCCESS;
+    
+    if (buffer->size() <= 0) {
+        // when empty, only grow 1bytes, but the buffer will cache more.
+        if ((ret = buffer->grow(skt, 1)) != ERROR_SUCCESS) {
+            if (!srs_is_client_gracefully_close(ret)) {
+                srs_error("read body from server failed. ret=%d", ret);
+            }
+            return ret;
+        }
+    }
+    
+    int nb_bytes = srs_min(max, buffer->size());
+    
+    srs_assert(nb_bytes);
+    data.append(buffer->read_slice(nb_bytes), nb_bytes);
+    nb_read += nb_bytes;
+    
+    // when read completed, eof.
+    if (nb_read >= (int)owner->content_length()) {
+        is_eof = true;
     }
     }
     
     
     return ret;
     return ret;
@@ -917,7 +1013,7 @@ SrsHttpMessage::~SrsHttpMessage()
     srs_freep(_http_ts_send_buffer);
     srs_freep(_http_ts_send_buffer);
 }
 }
 
 
-int SrsHttpMessage::initialize(string url, http_parser* header, string body, vector<SrsHttpHeaderField>& headers)
+int SrsHttpMessage::update(string url, http_parser* header, SrsFastBuffer* body, vector<SrsHttpHeaderField>& headers)
 {
 {
     int ret = ERROR_SUCCESS;
     int ret = ERROR_SUCCESS;
 
 
@@ -929,9 +1025,9 @@ int SrsHttpMessage::initialize(string url, http_parser* header, string body, vec
     std::string transfer_encoding = get_request_header("Transfer-Encoding");
     std::string transfer_encoding = get_request_header("Transfer-Encoding");
     chunked = (transfer_encoding == "chunked");
     chunked = (transfer_encoding == "chunked");
     
     
-    // TODO: FIXME: remove it, use fast buffer instead.
-    if (!body.empty()) {
-        _body->append((char*)body.data(), (int)body.length());
+    // set the buffer.
+    if ((ret = _body->initialize(body)) != ERROR_SUCCESS) {
+        return ret;
     }
     }
     
     
     // parse uri from url.
     // parse uri from url.
@@ -946,6 +1042,18 @@ int SrsHttpMessage::initialize(string url, http_parser* header, string body, vec
     
     
     // parse uri to schema/server:port/path?query
     // parse uri to schema/server:port/path?query
     std::string uri = "http://" + host + _url;
     std::string uri = "http://" + host + _url;
+    
+    return update(uri);
+}
+
+int SrsHttpMessage::update(string uri)
+{
+    int ret = ERROR_SUCCESS;
+    
+    if (uri.empty()) {
+        return ret;
+    }
+    
     if ((ret = _uri->initialize(uri)) != ERROR_SUCCESS) {
     if ((ret = _uri->initialize(uri)) != ERROR_SUCCESS) {
         return ret;
         return ret;
     }
     }
@@ -1069,47 +1177,29 @@ string SrsHttpMessage::path()
     return _uri->get_path();
     return _uri->get_path();
 }
 }
 
 
-int SrsHttpMessage::body_read_all(string body)
+int SrsHttpMessage::body_read_all(string& body)
 {
 {
     int ret = ERROR_SUCCESS;
     int ret = ERROR_SUCCESS;
     
     
-    int64_t content_length = (int64_t)_header.content_length;
+    // chunked, always read with
+    if (chunked) {
+        return _body->read(body);
+    }
+    
+    int content_length = (int)(int64_t)_header.content_length;
     
     
     // ignore if not set, should be zero length body.
     // ignore if not set, should be zero length body.
-    if (content_length < 0) {
-        if (!_body->empty()) {
-            srs_warn("unspecified content-length with body cached.");
-        } else {
+    if (content_length <= 0) {
         srs_info("unspecified content-length with body empty.");
         srs_info("unspecified content-length with body empty.");
-        }
         return ret;
         return ret;
     }
     }
     
     
     // when content length specified, read specified length.
     // when content length specified, read specified length.
-    if (content_length > 0) {
-        int left = (int)content_length;
-        while (left > 0) {
-            int nb_read = (int)body.length();
-            if ((ret = _body->read(left, body)) != ERROR_SUCCESS) {
+    int expect = content_length + (int)body.length();
+    while ((int)body.length() < expect) {
+        if ((ret = _body->read(body)) != ERROR_SUCCESS) {
             return ret;
             return ret;
         }
         }
-            
-            left -= (int)body.length() - nb_read;
-        }
-        return ret;
-    }
-    
-    // chunked encoding, read util got size=0 chunk.
-    for (;;) {
-        int nb_read = (int)body.length();
-        if ((ret = _body->read(0, body)) != ERROR_SUCCESS) {
-            return ret;
-        }
-        
-        // eof.
-        if (nb_read == (int)body.length()) {
-            break;
-        }
     }
     }
     
     
     return ret;
     return ret;
@@ -1173,10 +1263,12 @@ string SrsHttpMessage::get_request_header(string name)
 
 
 SrsHttpParser::SrsHttpParser()
 SrsHttpParser::SrsHttpParser()
 {
 {
+    buffer = new SrsFastBuffer();
 }
 }
 
 
 SrsHttpParser::~SrsHttpParser()
 SrsHttpParser::~SrsHttpParser()
 {
 {
+    srs_freep(buffer);
 }
 }
 
 
 int SrsHttpParser::initialize(enum http_parser_type type)
 int SrsHttpParser::initialize(enum http_parser_type type)
@@ -1213,7 +1305,7 @@ int SrsHttpParser::parse_message(SrsStSocket* skt, SrsHttpMessage** ppmsg)
     header = http_parser();
     header = http_parser();
     url = "";
     url = "";
     headers.clear();
     headers.clear();
-    body = "";
+    body_parsed = 0;
     
     
     // do parse
     // do parse
     if ((ret = parse_message_imp(skt)) != ERROR_SUCCESS) {
     if ((ret = parse_message_imp(skt)) != ERROR_SUCCESS) {
@@ -1227,7 +1319,7 @@ int SrsHttpParser::parse_message(SrsStSocket* skt, SrsHttpMessage** ppmsg)
     SrsHttpMessage* msg = new SrsHttpMessage(skt);
     SrsHttpMessage* msg = new SrsHttpMessage(skt);
     
     
     // initalize http msg, parse url.
     // initalize http msg, parse url.
-    if ((ret = msg->initialize(url, &header, body, headers)) != ERROR_SUCCESS) {
+    if ((ret = msg->update(url, &header, buffer, headers)) != ERROR_SUCCESS) {
         srs_error("initialize http msg failed. ret=%d", ret);
         srs_error("initialize http msg failed. ret=%d", ret);
         srs_freep(msg);
         srs_freep(msg);
         return ret;
         return ret;
@@ -1243,36 +1335,29 @@ int SrsHttpParser::parse_message_imp(SrsStSocket* skt)
 {
 {
     int ret = ERROR_SUCCESS;
     int ret = ERROR_SUCCESS;
     
     
-    ssize_t nread = 0;
-    ssize_t nparsed = 0;
-    
-    char* buf = new char[SRS_HTTP_HEADER_BUFFER];
-    SrsAutoFree(char, buf);
-    
-    // parser header.
-    for (;;) {
-        if ((ret = skt->read(buf, (size_t)sizeof(buf), &nread)) != ERROR_SUCCESS) {
+    while (true) {
+        if (buffer->size() <= 0) {
+            // when empty, only grow 1bytes, but the buffer will cache more.
+            if ((ret = buffer->grow(skt, 1)) != ERROR_SUCCESS) {
                 if (!srs_is_client_gracefully_close(ret)) {
                 if (!srs_is_client_gracefully_close(ret)) {
                     srs_error("read body from server failed. ret=%d", ret);
                     srs_error("read body from server failed. ret=%d", ret);
                 }
                 }
                 return ret;
                 return ret;
             }
             }
+        }
         
         
-        nparsed = http_parser_execute(&parser, &settings, buf, nread);
-        srs_info("read_size=%d, nparsed=%d", (int)nread, (int)nparsed);
+        int nb_header = srs_min(SRS_HTTP_HEADER_BUFFER, buffer->size());
+        ssize_t nparsed = http_parser_execute(&parser, &settings, buffer->bytes(), nb_header);
+        srs_info("buffer=%d, nparsed=%d, body=%d", buffer->size(), (int)nparsed, body_parsed);
+        if (nparsed - body_parsed > 0) {
+            buffer->read_slice(nparsed - body_parsed);
+        }
 
 
         // ok atleast header completed,
         // ok atleast header completed,
         // never wait for body completed, for maybe chunked.
         // never wait for body completed, for maybe chunked.
         if (state == SrsHttpParseStateHeaderComplete || state == SrsHttpParseStateMessageComplete) {
         if (state == SrsHttpParseStateHeaderComplete || state == SrsHttpParseStateMessageComplete) {
             break;
             break;
         }
         }
-        
-        // when not complete, the parser should consume all bytes.
-        if (nparsed != nread) {
-            ret = ERROR_HTTP_PARSE_HEADER;
-            srs_error("parse response error, parsed(%d)!=read(%d), ret=%d", (int)nparsed, (int)nread, ret);
-            return ret;
-        }
     }
     }
 
 
     // parse last header.
     // parse last header.
@@ -1280,12 +1365,6 @@ int SrsHttpParser::parse_message_imp(SrsStSocket* skt)
         headers.push_back(std::make_pair(filed_name, field_value));
         headers.push_back(std::make_pair(filed_name, field_value));
     }
     }
 
 
-    // when parse completed, cache the left body.
-    if (nread && nparsed < nread) {
-        body.append(buf + nparsed, nread - nparsed);
-        srs_info("cache %d bytes read body.", nread - nparsed);
-    }
-
     return ret;
     return ret;
 }
 }
 
 
@@ -1385,9 +1464,7 @@ int SrsHttpParser::on_body(http_parser* parser, const char* at, size_t length)
     SrsHttpParser* obj = (SrsHttpParser*)parser->data;
     SrsHttpParser* obj = (SrsHttpParser*)parser->data;
     srs_assert(obj);
     srs_assert(obj);
     
     
-    if (length > 0) {
-        obj->body.append(at, (int)length);
-    }
+    obj->body_parsed += length;
     
     
     srs_info("Body: %.*s", (int)length, at);
     srs_info("Body: %.*s", (int)length, at);
 
 

@@ -192,10 +192,14 @@ public:
     virtual ~ISrsHttpResponseReader();
     virtual ~ISrsHttpResponseReader();
 public:
 public:
     /**
     /**
+    * whether response read EOF.
+    */
+    virtual bool eof() = 0;
+    /**
     * read from the response body.
     * read from the response body.
-    * @param max the max size to read. 0 to ignore.
+    * @remark when eof(), return error.
     */
     */
-    virtual int read(int max, std::string& data) = 0;
+    virtual int read(std::string& data) = 0;
 };
 };
 
 
 // Objects implementing the Handler interface can be
 // Objects implementing the Handler interface can be
@@ -394,24 +398,24 @@ class SrsHttpResponseReader : virtual public ISrsHttpResponseReader
 private:
 private:
     SrsStSocket* skt;
     SrsStSocket* skt;
     SrsHttpMessage* owner;
     SrsHttpMessage* owner;
-    SrsSimpleBuffer* cache;
+    SrsFastBuffer* buffer;
+    bool is_eof;
+    int64_t nb_read;
 public:
 public:
     SrsHttpResponseReader(SrsHttpMessage* msg, SrsStSocket* io);
     SrsHttpResponseReader(SrsHttpMessage* msg, SrsStSocket* io);
     virtual ~SrsHttpResponseReader();
     virtual ~SrsHttpResponseReader();
 public:
 public:
     /**
     /**
-    * whether the cache is empty.
-    */
-    virtual bool empty();
-    /**
-    * append specified size of bytes data to reader.
-    * when we read http message from socket, we maybe read header+body, 
-    * so the reader should provides stream cache feature.
+    * initialize the response reader with buffer.
     */
     */
-    virtual int append(char* data, int size);
+    virtual int initialize(SrsFastBuffer* buffer);
 // interface ISrsHttpResponseReader
 // interface ISrsHttpResponseReader
 public:
 public:
-    virtual int read(int max, std::string& data);
+    virtual bool eof();
+    virtual int read(std::string& data);
+private:
+    virtual int read_chunked(std::string& data);
+    virtual int read_specified(int max, std::string& data);
 };
 };
 
 
 // for http header.
 // for http header.
@@ -453,6 +457,7 @@ private:
     /**
     /**
     * use a buffer to read and send ts file.
     * use a buffer to read and send ts file.
     */
     */
+    // TODO: FIXME: remove it.
     char* _http_ts_send_buffer;
     char* _http_ts_send_buffer;
     // http headers
     // http headers
     std::vector<SrsHttpHeaderField> _headers;
     std::vector<SrsHttpHeaderField> _headers;
@@ -463,11 +468,16 @@ public:
     virtual ~SrsHttpMessage();
     virtual ~SrsHttpMessage();
 public:
 public:
     /**
     /**
-    * set the original messages, then initialize the message.
+    * set the original messages, then update the message.
     */
     */
-    virtual int initialize(std::string url, http_parser* header, 
-        std::string body, std::vector<SrsHttpHeaderField>& headers
+    virtual int update(std::string url, http_parser* header, 
+        SrsFastBuffer* body, std::vector<SrsHttpHeaderField>& headers
     );
     );
+    /**
+    * update the request with uri.
+    * @remark user can invoke this multiple times.
+    */
+    virtual int update(std::string uri);
 public:
 public:
     virtual char* http_ts_send_buffer();
     virtual char* http_ts_send_buffer();
 public:
 public:
@@ -485,7 +495,7 @@ public:
     virtual std::string host();
     virtual std::string host();
     virtual std::string path();
     virtual std::string path();
 public:
 public:
-    virtual int body_read_all(std::string body);
+    virtual int body_read_all(std::string& body);
     virtual ISrsHttpResponseReader* body_reader();
     virtual ISrsHttpResponseReader* body_reader();
     virtual int64_t content_length();
     virtual int64_t content_length();
     /**
     /**
@@ -510,7 +520,7 @@ private:
     http_parser_settings settings;
     http_parser_settings settings;
     http_parser parser;
     http_parser parser;
     // the global parse buffer.
     // the global parse buffer.
-    SrsFastBuffer* fbuffer;
+    SrsFastBuffer* buffer;
 private:
 private:
     // http parse data, reset before parse message.
     // http parse data, reset before parse message.
     bool expect_filed_name;
     bool expect_filed_name;
@@ -520,7 +530,7 @@ private:
     http_parser header;
     http_parser header;
     std::string url;
     std::string url;
     std::vector<SrsHttpHeaderField> headers;
     std::vector<SrsHttpHeaderField> headers;
-    std::string body;
+    int body_parsed;
 public:
 public:
     SrsHttpParser();
     SrsHttpParser();
     virtual ~SrsHttpParser();
     virtual ~SrsHttpParser();

@@ -165,8 +165,14 @@ int SrsHttpClient::get(SrsHttpUri* uri, std::string req, SrsHttpMessage** ppmsg)
         srs_error("parse http post response failed. ret=%d", ret);
         srs_error("parse http post response failed. ret=%d", ret);
         return ret;
         return ret;
     }
     }
-
     srs_assert(msg);
     srs_assert(msg);
+    
+    // for GET, server response no uri, we update with request uri.
+    if ((ret = msg->update(uri->get_url())) != ERROR_SUCCESS) {
+        srs_freep(msg);
+        return ret;
+    }
+
     *ppmsg = msg;
     *ppmsg = msg;
     srs_info("parse http get response success.");
     srs_info("parse http get response success.");
 
 

@@ -31,7 +31,7 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 // current release version
 // current release version
 #define VERSION_MAJOR       2
 #define VERSION_MAJOR       2
 #define VERSION_MINOR       0
 #define VERSION_MINOR       0
-#define VERSION_REVISION    131
+#define VERSION_REVISION    132
 
 
 // server info.
 // server info.
 #define RTMP_SIG_SRS_KEY "SRS"
 #define RTMP_SIG_SRS_KEY "SRS"

@@ -243,6 +243,8 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 #define ERROR_STREAM_CASTER_AVC_SPS         4022
 #define ERROR_STREAM_CASTER_AVC_SPS         4022
 #define ERROR_STREAM_CASTER_AVC_PPS         4023
 #define ERROR_STREAM_CASTER_AVC_PPS         4023
 #define ERROR_STREAM_CASTER_FLV_TAG         4024
 #define ERROR_STREAM_CASTER_FLV_TAG         4024
+#define ERROR_HTTP_RESPONSE_EOF             4025
+#define ERROR_HTTP_INVALID_CHUNK_HEADER     4026
 
 
 /**
 /**
 * whether the error code is an system control error.
 * whether the error code is an system control error.

@@ -312,8 +312,6 @@ int run()
     return run_master();
     return run_master();
 }
 }
 
 
-#include <srs_app_http.hpp>
-#include <srs_app_http_client.hpp>
 int run_master()
 int run_master()
 {
 {
     int ret = ERROR_SUCCESS;
     int ret = ERROR_SUCCESS;
@@ -329,22 +327,6 @@ int run_master()
     if ((ret = _srs_server->initialize_st()) != ERROR_SUCCESS) {
     if ((ret = _srs_server->initialize_st()) != ERROR_SUCCESS) {
         return ret;
         return ret;
     }
     }
-/*SrsHttpClient client;
-SrsHttpUri uri;
-if ((ret = uri.initialize("http://ossrs.net:8081/live/livestream.flv")) != ERROR_SUCCESS) {
-    return ret;
-}
-SrsHttpMessage* msg = NULL;
-if ((ret = client.get(&uri, "", &msg)) != ERROR_SUCCESS) {
-    return ret;
-}
-for (;;) {
-    ISrsHttpResponseReader* br = msg->body_reader();
-    std::string data;
-    if ((ret = br->read(0, data)) != ERROR_SUCCESS) {
-        return ret;
-    }
-}*/
     
     
     if ((ret = _srs_server->listen()) != ERROR_SUCCESS) {
     if ((ret = _srs_server->listen()) != ERROR_SUCCESS) {
         return ret;
         return ret;

@@ -62,6 +62,16 @@ SrsFastBuffer::SrsFastBuffer()
     p = end = buffer;
     p = end = buffer;
 }
 }
 
 
+int SrsFastBuffer::size()
+{
+    return end - p;
+}
+
+char* SrsFastBuffer::bytes()
+{
+    return p;
+}
+
 void SrsFastBuffer::set_buffer(int buffer_size)
 void SrsFastBuffer::set_buffer(int buffer_size)
 {
 {
     // the user-space buffer size limit to a max value.
     // the user-space buffer size limit to a max value.

@@ -86,6 +86,16 @@ public:
     virtual ~SrsFastBuffer();
     virtual ~SrsFastBuffer();
 public:
 public:
     /**
     /**
+    * get the size of current bytes in buffer.
+    */
+    virtual int size();
+    /**
+    * get the current bytes in buffer.
+    * @remark user should use read_slice() if possible, 
+    *       the bytes() is used to test bytes, for example, to detect the bytes schema.
+    */
+    virtual char* bytes();
+    /**
     * create buffer with specifeid size.
     * create buffer with specifeid size.
     * @param buffer the size of buffer.
     * @param buffer the size of buffer.
     * @remark when MR(SRS_PERF_MERGED_READ) disabled, always set to 8K.
     * @remark when MR(SRS_PERF_MERGED_READ) disabled, always set to 8K.
@@ -110,6 +120,8 @@ public:
     * skip some bytes in buffer.
     * skip some bytes in buffer.
     * @param size the bytes to skip. positive to next; negative to previous.
     * @param size the bytes to skip. positive to next; negative to previous.
     * @remark assert buffer already grow(size).
     * @remark assert buffer already grow(size).
+    * @remark always use read_slice to consume bytes, which will reset for EOF.
+    *       while skip never consume bytes.
     */
     */
     virtual void skip(int size);
     virtual void skip(int size);
 public:
 public: