asyncweb: rewrite StillResponse

Author: yoursunny

examples/AsyncCam/AsyncCam.hpp

@@ -1,14 +1,12 @@
 #ifndef ASYNCCAM_HPP
 #define ASYNCCAM_HPP
 
-// This macro indicates where to send debug logs.
-// Delete this macro to disable debug logging.
-#define ESP32CAM_ASYNCWEB_LOGGER Serial
-
-#include <esp32cam-asyncweb.h>
-
+// It is necessary to include ESPAsyncWebServer.h before esp32cam.h for Arduino builder to
+// recognize the dependency.
 #include <ESPAsyncWebServer.h>
 
+#include <esp32cam.h>
+
 extern esp32cam::Resolution initialResolution;
 extern esp32cam::Resolution currentResolution;
 

examples/AsyncCam/README.md

@@ -2,5 +2,5 @@
 
 This example runs on ESP32-CAM board.
 It demonstrates how to use esp32cam library with [ESPAsyncWebServer](https://github.com/mathieucarbou/ESPAsyncWebServer) library.
-The HTTP server supports both ~~JPEG still image~~ and MJPEG stream, and allows changing camera resolution on the fly.
+The HTTP server supports both JPEG still image and MJPEG stream, and allows changing camera resolution on the fly.
 To use this example, modify WiFi SSID+password, then upload to ESP32.

examples/AsyncCam/handlers.cpp

@@ -113,7 +113,7 @@ addRequestHandlers() {
     Serial.printf("changeResolution(%ld,%ld) success\n", width, height);
     StreamString b;
     b.print(currentResolution);
-    request->send(b, "text/plain", b.length());
+    request->send(200, "text/plain", static_cast<String>(b));
   });
 
   server.on("/cam.jpg", esp32cam::asyncweb::handleStill);

src/esp32cam-asyncweb.h

@@ -7,6 +7,7 @@
 #ifndef ESP32CAM_H
 #define ESP32CAM_H
 
+#include "esp32cam/asyncweb.hpp"
 #include "esp32cam/camera.hpp"
 
 namespace esp32cam {