Fixed a FLV header bug causing both video and audio to always be mentioned even when not present, added header-only parsing support to HTTP library.

lib/flv_tag.cpp

@@ -587,11 +587,11 @@ bool FLV::Tag::DTSCAudioInit(DTSC::Stream & S){
 /// Assumes metadata is available - so check before calling!
 bool FLV::Tag::DTSCMetaInit(DTSC::Stream & S){
   //Unknown? Assume AAC.
-  if (S.metadata["audio"]["codec"].asString() == "?"){
+  if (S.metadata.isMember("audio") && S.metadata["audio"]["codec"].asString() == "?"){
     S.metadata["audio"]["codec"] = "AAC";
   }
   //Unknown? Assume H264.
-  if (S.metadata["video"]["codec"].asString() == "?"){
+  if (S.metadata.isMember("video") && S.metadata["video"]["codec"].asString() == "?"){
     S.metadata["video"]["codec"] = "H264";
   }
 

lib/http_parser.cpp

@@ -6,6 +6,7 @@
 /// This constructor creates an empty HTTP::Parser, ready for use for either reading or writing.
 /// All this constructor does is call HTTP::Parser::Clean().
 HTTP::Parser::Parser(){
+  headerOnly = false;
   Clean();
 }
 
@@ -217,6 +218,9 @@ bool HTTP::Parser::parse(std::string & HTTPbuffer){
     }
     if (seenHeaders){
       if (length > 0){
+        if (headerOnly){
+          return true;
+        }
         unsigned int toappend = length - body.length();
         if (toappend > 0){
           body.append(HTTPbuffer, 0, toappend);

lib/http_parser.h

@@ -33,6 +33,7 @@ namespace HTTP {
       std::string url;
       std::string protocol;
       unsigned int length;
+      bool headerOnly; ///< If true, do not parse body if the length is a known size.
     private:
       bool seenHeaders;
       bool seenReq;