merge from srs2

@@ -1414,8 +1414,12 @@ int SrsHttpApi::process_request(ISrsHttpResponseWriter* w, ISrsHttpMessage* r)
 {
     int ret = ERROR_SUCCESS;
     
-    srs_trace("HTTP %s %s, content-length=%"PRId64"", 
-        r->method_str().c_str(), r->url().c_str(), r->content_length());
+    SrsHttpMessage* hm = dynamic_cast<SrsHttpMessage*>(r);
+    srs_assert(hm);
+    
+    srs_trace("HTTP API %s %s, content-length=%"PRId64", chunked=%d/%d",
+        r->method_str().c_str(), r->url().c_str(), r->content_length(),
+        hm->is_chunked(), hm->is_infinite_chunked());
     
     // method is OPTIONS and enable crossdomain, required crossdomain header.
     if (r->is_http_options() && _srs_config->get_http_api_crossdomain()) {

@@ -357,15 +357,29 @@ int SrsHttpResponseReader::read(char* data, int nb_data, int* nb_read)
     }
     
     // read by specified content-length
-    int max = (int)owner->content_length() - (int)nb_total_read;
-    if (max <= 0) {
-        is_eof = true;
-        return ret;
+    if (owner->content_length() != -1) {
+        int max = (int)owner->content_length() - (int)nb_total_read;
+        if (max <= 0) {
+            is_eof = true;
+            return ret;
+        }
+        
+        // change the max to read.
+        nb_data = srs_min(nb_data, max);
+        return read_specified(data, nb_data, nb_read);
     }
     
-    // change the max to read.
-    nb_data = srs_min(nb_data, max);
-    return read_specified(data, nb_data, nb_read);
+    // infinite chunked mode, directly read.
+    if (owner->is_infinite_chunked()) {
+        srs_assert(!owner->is_chunked() && owner->content_length() == -1);
+        return read_specified(data, nb_data, nb_read);
+    }
+    
+    // infinite chunked mode, but user not set it,
+    // we think there is no data left.
+    is_eof = true;
+    
+    return ret;
 }
 
 int SrsHttpResponseReader::read_chunked(char* data, int nb_data, int* nb_read)
@@ -505,6 +519,7 @@ SrsHttpMessage::SrsHttpMessage(ISrsProtocolReaderWriter* io, SrsConnection* c) :
 {
     conn = c;
     chunked = false;
+    infinite_chunked = false;
     keep_alive = true;
     _uri = new SrsHttpUri();
     _body = new SrsHttpResponseReader(this, io);
@@ -660,6 +675,11 @@ bool SrsHttpMessage::is_keep_alive()
     return keep_alive;
 }
 
+bool SrsHttpMessage::is_infinite_chunked()
+{
+    return infinite_chunked;
+}
+
 string SrsHttpMessage::uri()
 {
     std::string uri = _uri->get_schema();
@@ -714,6 +734,25 @@ int SrsHttpMessage::parse_rest_id(string pattern)
     return -1;
 }
 
+int SrsHttpMessage::enter_infinite_chunked()
+{
+    int ret = ERROR_SUCCESS;
+    
+    if (infinite_chunked) {
+        return ret;
+    }
+    
+    if (is_chunked() || content_length() != -1) {
+        ret = ERROR_HTTP_DATA_INVALID;
+        srs_error("infinite chunkted not supported in specified codec. ret=%d", ret);
+        return ret;
+    }
+    
+    infinite_chunked = true;
+    
+    return ret;
+}
+
 int SrsHttpMessage::body_read_all(string& body)
 {
     int ret = ERROR_SUCCESS;

@@ -152,9 +152,6 @@ typedef std::pair<std::string, std::string> SrsHttpHeaderField;
 // The field semantics differ slightly between client and server
 // usage. In addition to the notes on the fields below, see the
 // documentation for Request.Write and RoundTripper.
-/**
- * the http message, request or response.
- */
 class SrsHttpMessage : public ISrsHttpMessage
 {
 private:
@@ -180,6 +177,10 @@ private:
      */
     bool chunked;
     /**
+     * whether the body is infinite chunked.
+     */
+     bool infinite_chunked;
+    /**
      * whether the request indicates should keep alive
      * for the http connection.
      */
@@ -232,6 +233,11 @@ public:
      */
     virtual bool is_chunked();
     /**
+     * whether body is infinite chunked encoding.
+     * @remark set by enter_infinite_chunked.
+     */
+     virtual bool is_infinite_chunked();
+    /**
      * whether should keep the connection alive.
      */
     virtual bool is_keep_alive();
@@ -252,6 +258,8 @@ public:
      */
     virtual int parse_rest_id(std::string pattern);
 public:
+    virtual int enter_infinite_chunked();
+public:
     /**
      * read body to string.
      * @remark for small http body.

@@ -231,6 +231,12 @@ public:
      * @param nb_data, the max size of data buffer.
      * @param nb_read, the actual read size of bytes. NULL to ignore.
      * @remark when eof(), return error.
+     * @remark for some server, the content-length not specified and not chunked,
+     *      which is actually the infinite chunked encoding, which after http header 
+     *      is http response data, it's ok for browser. that is,
+     *      when user call this read, please ensure there is data to read(by content-length
+     *      or by chunked), because the sdk never know whether there is no data or 
+     *      infinite chunked.
      */
     virtual int read(char* data, int nb_data, int* nb_read) = 0;
 };
@@ -445,9 +451,19 @@ typedef std::pair<std::string, std::string> SrsHttpHeaderField;
 // The field semantics differ slightly between client and server
 // usage. In addition to the notes on the fields below, see the
 // documentation for Request.Write and RoundTripper.
-/**
- * the http message, request or response.
- */
+//
+// There are some modes to determine the length of body:
+//      1. content-length and chunked.
+//      2. user confirmed infinite chunked.
+//      3. no body or user not confirmed infinite chunked.
+// For example:
+//      ISrsHttpMessage* r = ...;
+//      while (!r->eof()) r->read(); // read in mode 1 or 3.
+// For some server, we can confirm the body is infinite chunked:
+//      ISrsHttpMessage* r = ...;
+//      r->enter_infinite_chunked();
+//      while (!r->eof()) r->read(); // read in mode 2
+// @rmark for mode 2, the infinite chunked, all left data is body.
 class ISrsHttpMessage
 {
 private:
@@ -503,6 +519,12 @@ public:
     virtual int parse_rest_id(std::string pattern) = 0;
 public:
     /**
+     * the left all data is chunked body, the infinite chunked mode,
+     * which is chunked encoding without chunked header.
+     * @remark error when message is in chunked or content-length specified.
+     */
+    virtual int enter_infinite_chunked() = 0;
+    /**
      * read body to string.
      * @remark for small http body.
      */