dump html fix

Author: abratchik

API.md

@@ -76,11 +76,16 @@ Only for 3Mp+ camera modules:
 
 #### Commands
 These are commands; they can be sent by calling the `/control` URI with them as 
-the `<key>` *(a `<val>` must also be supplied, but can be any value and is ignored)*.
+the `<key>` parameter.
 ```
-save_prefs      - Saves preferences file
-clear_prefs     - Deletes the preferences file
-reboot          - Reboots the board
+* save_prefs      - Saves preferences
+  `val=cam` or not specified will save camera preferences
+  `val=conn` will save network preferences
+* clear_prefs     - Deletes camera the preferences
+  `val=cam` or not specified will reset camera preferences
+  `val=conn` will reset network preferences. Attention! after this the server will boot as access point after restart, and all
+  connection settings will be lost. 
+* reboot          - Reboots the board
 ```
 
 ## Examples

README.md

@@ -1,4 +1,5 @@
-# ESP32-CAM Example Revisited<sup>2</sup> &nbsp;&nbsp;&nbsp;  &nbsp;&nbsp; <span title="ESP EYE">![ESP-EYE logo](data/www/logo.svg)</span>
+# ESP32-CAM Example Revisited<sup>2</sup> &nbsp;&nbsp;&nbsp;  &nbsp;&nbsp; 
+<span title="ESP EYE">![ESP-EYE logo](data/www/logo.svg)</span>
 
 ## Taken from the ESP examples, and expanded 
 This sketch is a extension/expansion/rework of the 'official' ESP32 Camera example 

data/www/dump.html

@@ -125,7 +125,7 @@ <h1>ESP32 Cam Webserver</h1>
             bodyHtml += 'Filesystem: ' + data.storage_size + data.storage_units +  
                         ', used: ' + data.storage_used + data.storage_units + '<br>';
 
-            if(data.serial_buf.lenght == 0) {
+            if(data.serial_buf != "") {
                 bodyHtml += '<h2>Serial</h2>';
                 bodyHtml += data.serial_buf;
             }

src/app_component.cpp

@@ -33,16 +33,18 @@ int CLAppComponent::readJsonIntVal(jparse_ctx_t *jctx_ptr, char* token) {
   return 0;
 }
 
-void CLAppComponent::removePrefs() {
+int CLAppComponent::removePrefs() {
   char *prefs_file = getPrefsFileName(true);  
   if (fsStorage->exists(prefs_file)) {
     Serial.printf("Removing %s\r\n", prefs_file);
     if (!fsStorage->remove(prefs_file)) {
-      Serial.println("Error removing preferences");
+      sprintf("Error removing %s preferences\r\n", tag);
+      return OS_FAIL;
     }
   } else {
-    Serial.println("No saved preferences file to remove");
+    Serial.printf("No saved %s preferences to remove\r\n", tag);
   }
+  return OS_SUCCESS;
 }
 
 int CLAppComponent::parsePrefs(jparse_ctx_t *jctx) {

src/app_conn.cpp

@@ -270,7 +270,7 @@ int CLAppConn::loadPrefs() {
 
 int CLAppConn::savePrefs() {
     // TODO: add saving of WiFi prefs
-    return OK;
+    return OS_SUCCESS;
 }
 
 void CLAppConn::enableOTA(bool enable) {

src/app_httpd.cpp

@@ -248,6 +248,22 @@ void onControl(AsyncWebServerRequest *request) {
         AppHttpd.serialSendCommand(value.c_str());
         request->send(200, "", "OK");
         return;
+    }    
+    else if(variable ==  "save_prefs") {
+        CLAppComponent * component = (value == "conn"?(CLAppComponent*)&AppConn:(CLAppComponent*)&AppCam);
+        if(component->removePrefs() == OS_SUCCESS)
+            request->send(200, "", "OK");
+        else
+            request->send(500, "", "Failed to save preferences");
+        return;
+    }
+    else if(variable ==  "remove_prefs") {
+        CLAppComponent * component = (value == "conn"?(CLAppComponent*)&AppConn:(CLAppComponent*)&AppCam);
+        if(component->removePrefs() == OS_SUCCESS)
+            request->send(200, "", "OK");
+        else
+            request->send(500, "", "Failed to reset preferences");
+        return;
     }
 
     int val = value.toInt();
@@ -291,12 +307,6 @@ void onControl(AsyncWebServerRequest *request) {
     else if(variable ==  "lamp" && AppCam.getLamp() != -1) {
         AppCam.setLamp(constrain(val,0,100));
     }
-    else if(variable ==  "save_prefs") {
-        AppCam.savePrefs();
-    }
-    else if(variable == "clear_prefs") {
-        AppCam.removePrefs();
-    }
     else if(variable == "reboot") {
         if (AppCam.getLamp() != -1) AppCam.setLamp(0); // kill the lamp; otherwise it can remain on during the soft-reboot
         esp_task_wdt_init(3,true);  // schedule a a watchdog panic event for 3 seconds in the future