Fix handling of simultaneous connections in Web UI.

May be related to issue #68.

src/webui/httpconnection.cpp

@@ -78,21 +78,20 @@ void HttpConnection::handleDownloadFailure(const QString& url,
 }
 
 void HttpConnection::read() {
-  static QByteArray input;
-  input.append(m_socket->readAll());
+  m_receivedData.append(m_socket->readAll());
 
   // Parse HTTP request header
-  int header_end = input.indexOf("\r\n\r\n");
+  int header_end = m_receivedData.indexOf("\r\n\r\n");
   if (header_end < 0) {
-    qDebug() << "Partial request: \n" << input;
+    qDebug() << "Partial request: \n" << m_receivedData;
     // Partial request waiting for the rest
     return;
   }
-  QByteArray header = input.left(header_end);
+  QByteArray header = m_receivedData.left(header_end);
   m_parser.writeHeader(header);
   if (m_parser.isError()) {
     qWarning() << Q_FUNC_INFO << "header parsing error";
-    input.clear();
+    m_receivedData.clear();
     m_generator.setStatusLine(400, "Bad Request");
     write();
     return;
@@ -101,12 +100,12 @@ void HttpConnection::read() {
   // Parse HTTP request message
   if (m_parser.header().hasContentLength())  {
     const int expected_length = m_parser.header().contentLength();
-    QByteArray message = input.mid(header_end + 4, expected_length);
+    QByteArray message = m_receivedData.mid(header_end + 4, expected_length);
 
     if (expected_length > 10000000) {
       qWarning() << "Bad request: message too long";
       m_generator.setStatusLine(400, "Bad Request");
-      input.clear();
+      m_receivedData.clear();
       write();
       return;
     }
@@ -119,9 +118,9 @@ void HttpConnection::read() {
 
     m_parser.writeMessage(message);
 
-    input = input.mid(header_end + 4 + expected_length);
+    m_receivedData = m_receivedData.mid(header_end + 4 + expected_length);
   } else {
-    input.clear();
+    m_receivedData.clear();
   }
 
   if (m_parser.isError()) {

src/webui/httpconnection.h

@@ -88,6 +88,7 @@ private:
   HttpServer *m_httpserver;
   HttpRequestParser m_parser;
   HttpResponseGenerator m_generator;
+  QByteArray m_receivedData;
 };
 
 #endif