Merge pull request #54 from attilamolnar/2.0+webcpanelfix

Don't create zero length DataBlocks in BinarySocket::Write()

include/sockets.h

@@ -347,7 +347,7 @@ class CoreExport BinarySocket : public virtual Socket
 
 	/** Write data to the socket
 	 * @param buffer The data to write
-	 * @param l The length of the data
+	 * @param l The length of the data; if 0 then this function returns without doing anything
 	 */
 	virtual void Write(const char *buffer, size_t l);
 	void Write(const char *message, ...);

modules/webcpanel/template_fileserver.cpp

@@ -220,8 +220,11 @@ void TemplateFileServer::Serve(HTTPProvider *server, const Anope::string &page_n
 					Log() << "Invalid INCLUDE in web template " << this->file_name;
 				else
 				{
-					reply.Write(finished); // Write out what we have currently so we insert this files contents here
-					finished.clear();
+					if (!finished.empty())
+					{
+						reply.Write(finished); // Write out what we have currently so we insert this files contents here
+						finished.clear();
+					}
 
 					TemplateFileServer tfs(tokens[1]);
 					tfs.Serve(server, page_name, client, message, reply, r);
@@ -255,7 +258,7 @@ void TemplateFileServer::Serve(HTTPProvider *server, const Anope::string &page_n
 		}
 	}
 
-	reply.Write(finished);
-	return;
+	if (!finished.empty())
+		reply.Write(finished);
 }
 

src/socket_transport.cpp

@@ -167,6 +167,8 @@ bool BinarySocket::ProcessWrite()
 
 void BinarySocket::Write(const char *buffer, size_t l)
 {
+	if (l == 0)
+		return;
 	this->write_buffer.push_back(new DataBlock(buffer, l));
 	SocketEngine::Change(this, true, SF_WRITABLE);
 }