Exposing new methods:

- sent response from request
- response code
- response headers
And fixed missing response when a handler forget to respond (501)

examples/SimpleServer/SimpleServer.ino

@@ -85,7 +85,15 @@ void setup() {
   WiFi.softAP("esp-captive");
 #endif
 
+  // curl -v -X GET http://192.168.4.1/handler-not-sending-response
+  server.on("/handler-not-sending-response", HTTP_GET, [](AsyncWebServerRequest* request) {
+    // handler forgot to send a response to the client => 501 Not Implemented
+  });
+
+  ///////////////////////////////////////////////////////////////////////
   // Request header manipulations
+  ///////////////////////////////////////////////////////////////////////
+
   // curl -v -X GET -H "x-remove-me: value" http://192.168.4.1/headers
   server.on("/headers", HTTP_GET, [](AsyncWebServerRequest* request) {
     Serial.printf("Request Headers:\n");
@@ -106,6 +114,8 @@ void setup() {
     request->send(200);
   });
 
+  ///////////////////////////////////////////////////////////////////////
+
   server.on("/", HTTP_GET, [](AsyncWebServerRequest* request) {
     request->send(200, "text/plain", "Hello, world");
   });

src/ESPAsyncWebServer.h

@@ -195,6 +195,9 @@ class AsyncWebServerRequest {
     AsyncWebServerResponse* _response;
     ArDisconnectHandler _onDisconnectfn;
 
+    // response is sent
+    bool _sent = false;
+
     String _temp;
     uint8_t _parseState;
 
@@ -308,6 +311,7 @@ class AsyncWebServerRequest {
     void redirect(const String& url) { return redirect(url.c_str()); };
 
     void send(AsyncWebServerResponse* response);
+    const AsyncWebServerResponse* sentResponse() const { return _response; }
 
     void send(int code, const char* contentType = asyncsrv::empty, const char* content = asyncsrv::empty, AwsTemplateProcessor callback = nullptr) { send(beginResponse(code, contentType, content, callback)); }
     void send(int code, const String& contentType, const String& content = emptyString, AwsTemplateProcessor callback = nullptr) { send(beginResponse(code, contentType, content, callback)); }
@@ -647,6 +651,7 @@ class AsyncWebServerResponse {
     AsyncWebServerResponse();
     virtual ~AsyncWebServerResponse();
     virtual void setCode(int code);
+    int code() const { return _code; }
     virtual void setContentLength(size_t len);
     void setContentType(const String& type) { setContentType(type.c_str()); }
     virtual void setContentType(const char* type);
@@ -656,6 +661,7 @@ class AsyncWebServerResponse {
     bool addHeader(const String& name, long value, bool replaceExisting = true) { return addHeader(name.c_str(), value, replaceExisting); }
     virtual bool removeHeader(const char* name);
     virtual const AsyncWebHeader* getHeader(const char* name) const;
+    const std::list<AsyncWebHeader>& getHeaders() const { return _headers; }
 
 #ifndef ESP8266
     [[deprecated("Use instead: _assembleHead(String& buffer, uint8_t version)")]]

src/WebRequest.cpp

@@ -123,7 +123,6 @@ void AsyncWebServerRequest::_onData(void* buf, size_t len) {
           }
         }
         if (!_isPlainPost) {
-          // check if authenticated before calling the body
           if (_handler)
             _handler->handleBody(this, (uint8_t*)buf, len, _parsedLength, _contentLength);
           _parsedLength += len;
@@ -139,11 +138,10 @@ void AsyncWebServerRequest::_onData(void* buf, size_t len) {
       }
       if (_parsedLength == _contentLength) {
         _parseState = PARSE_REQ_END;
-        // check if authenticated before calling handleRequest and request auth instead
         if (_handler)
           _handler->handleRequest(this);
-        else
-          send(501);
+        if (!_sent)
+          send(501, T_text_plain, "Handler did not handle the request");
       }
     }
     break;
@@ -498,7 +496,6 @@ void AsyncWebServerRequest::_parseMultipartPostByte(uint8_t data, bool last) {
         _params.emplace_back(_itemName, _itemValue, true);
       } else {
         if (_itemSize) {
-          // check if authenticated before calling the upload
           if (_handler)
             _handler->handleUpload(this, _itemFilename, _itemSize - _itemBufferIndex, _itemBuffer, _itemBufferIndex, true);
           _itemBufferIndex = 0;
@@ -571,15 +568,14 @@ void AsyncWebServerRequest::_parseLine() {
         String response(T_HTTP_100_CONT);
         _client->write(response.c_str(), response.length());
       }
-      // check handler for authentication
       if (_contentLength) {
         _parseState = PARSE_REQ_BODY;
       } else {
         _parseState = PARSE_REQ_END;
         if (_handler)
           _handler->handleRequest(this);
-        else
-          send(501);
+        if (!_sent)
+          send(501, T_text_plain, "Handler did not handle the request");
       }
     } else
       _parseReqHeader();
@@ -717,6 +713,7 @@ void AsyncWebServerRequest::send(AsyncWebServerResponse* response) {
   if (_response == NULL) {
     _client->close(true);
     _onDisconnect();
+    _sent = true;
     return;
   }
   if (!_response->_sourceValid()) {
@@ -726,6 +723,7 @@ void AsyncWebServerRequest::send(AsyncWebServerResponse* response) {
   } else {
     _client->setRxTimeout(0);
     _response->_respond(this);
+    _sent = true;
   }
 }