Fix cookie usage, use correct http response codes, add 404 page (#1495)

* replaced some HTTP response code with better matching codes

* add custom 404 page, add log entry for debugging

* fix cookie

* replace non-necessary whitespace

* .

Co-authored-by: CaCO3 <caco@ruinelli.ch>

code/components/jomjol_controlcamera/ClassControllCamera.cpp

@@ -425,7 +425,7 @@ esp_err_t CCamera::CaptureToFile(std::string nm, int delay)
     nm = FormatFileName(nm);
 
 #ifdef DEBUG_DETAIL_ON
-    ESP_LOGD(TAG, "Save Camera to : %s", nm.c_str());
+    ESP_LOGD(TAG, "Save Camera to: %s", nm.c_str());
 #endif
 
     ftype = toUpper(getFileType(nm));

code/components/jomjol_fileserver_ota/server_file.cpp

@@ -219,9 +219,9 @@ static esp_err_t http_resp_dir_html(httpd_req_t *req, const char *dirpath, const
     ESP_LOGD(TAG, "entrypath: <%s>", entrypath);
 
     if (!dir) {
-        ESP_LOGE(TAG, "Failed to stat dir : %s", dirpath);
+        LogFile.WriteToFile(ESP_LOG_ERROR, TAG, "Failed to stat dir: %s", dirpath);
         /* Respond with 404 Not Found */
-        httpd_resp_send_err(req, HTTPD_404_NOT_FOUND, "Directory does not exist");
+        httpd_resp_send_err(req, HTTPD_404_NOT_FOUND, get404());
         return ESP_FAIL;
     }
 
@@ -278,11 +278,11 @@ static esp_err_t http_resp_dir_html(httpd_req_t *req, const char *dirpath, const
             strlcpy(entrypath + dirpath_len, entry->d_name, sizeof(entrypath) - dirpath_len);
             ESP_LOGD(TAG, "Entrypath: %s", entrypath);
             if (stat(entrypath, &entry_stat) == -1) {
-                ESP_LOGE(TAG, "Failed to stat %s : %s", entrytype, entry->d_name);
+                ESP_LOGE(TAG, "Failed to stat %s: %s", entrytype, entry->d_name);
                 continue;
             }
             sprintf(entrysize, "%ld", entry_stat.st_size);
-            ESP_LOGI(TAG, "Found %s : %s (%s bytes)", entrytype, entry->d_name, entrysize);
+            ESP_LOGI(TAG, "Found %s: %s (%s bytes)", entrytype, entry->d_name, entrysize);
 
             /* Send chunk of HTML file containing table entries with file name and size */
             httpd_resp_sendstr_chunk(req, "<tr><td><a href=\"");
@@ -361,15 +361,15 @@ static esp_err_t send_datafile(httpd_req_t *req, bool send_full_file)
 
     fd = OpenFileAndWait(currentfilename.c_str(), "r");
     if (!fd) {
-        ESP_LOGE(TAG, "Failed to read existing file : %s", filepath);
-        /* Respond with 500 Internal Server Error */
-        httpd_resp_send_err(req, HTTPD_500_INTERNAL_SERVER_ERROR, "Failed to read existing file");
+        LogFile.WriteToFile(ESP_LOG_ERROR, TAG, "Failed to read existing file: %s", filepath);
+        /* Respond with 404 Error */
+        httpd_resp_send_err(req, HTTPD_404_NOT_FOUND, get404());
         return ESP_FAIL;
     }
 
     httpd_resp_set_hdr(req, "Access-Control-Allow-Origin", "*");
 
-//    ESP_LOGI(TAG, "Sending file : %s (%ld bytes)...", &filename, file_stat.st_size);
+//    ESP_LOGI(TAG, "Sending file: %s (%ld bytes)...", &filename, file_stat.st_size);
     set_content_type_from_file(req, filename);
 
     if (!send_full_file) { // Send only last part of file
@@ -446,15 +446,15 @@ static esp_err_t send_logfile(httpd_req_t *req, bool send_full_file)
 
     fd = OpenFileAndWait(currentfilename.c_str(), "r");
     if (!fd) {
-        ESP_LOGE(TAG, "Failed to read existing file : %s", filepath);
-        /* Respond with 500 Internal Server Error */
-        httpd_resp_send_err(req, HTTPD_500_INTERNAL_SERVER_ERROR, "Failed to read existing file");
+        LogFile.WriteToFile(ESP_LOG_ERROR, TAG, "Failed to read existing file: %s", filepath);
+        /* Respond with 404 Error */
+        httpd_resp_send_err(req, HTTPD_404_NOT_FOUND, get404());
         return ESP_FAIL;
     }
 
     httpd_resp_set_hdr(req, "Access-Control-Allow-Origin", "*");
 
-//    ESP_LOGI(TAG, "Sending file : %s (%ld bytes)...", &filename, file_stat.st_size);
+//    ESP_LOGI(TAG, "Sending file: %s (%ld bytes)...", &filename, file_stat.st_size);
     set_content_type_from_file(req, filename);
 
     if (!send_full_file) { // Send only last part of file
@@ -534,8 +534,8 @@ static esp_err_t download_get_handler(httpd_req_t *req)
 
     if (!filename) {
         ESP_LOGE(TAG, "Filename is too long");
-        /* Respond with 500 Internal Server Error */
-        httpd_resp_send_err(req, HTTPD_500_INTERNAL_SERVER_ERROR, "Filename too long");
+        /* Respond with 414 Error */
+        httpd_resp_send_err(req, HTTPD_414_URI_TOO_LONG, "Filename too long");
         return ESP_FAIL;
     }
 
@@ -566,23 +566,23 @@ static esp_err_t download_get_handler(httpd_req_t *req)
 
         /* If file not present on SPIFFS check if URI
          * corresponds to one of the hardcoded paths */
-        ESP_LOGE(TAG, "Failed to stat file : %s", filepath);
+        LogFile.WriteToFile(ESP_LOG_ERROR, TAG, "Failed to stat file: %s!", filepath);
         /* Respond with 404 Not Found */
-        httpd_resp_send_err(req, HTTPD_404_NOT_FOUND, "File does not exist");
+        httpd_resp_send_err(req, HTTPD_404_NOT_FOUND, get404());
         return ESP_FAIL;
     }
 
     fd = OpenFileAndWait(filepath, "r");
     if (!fd) {
-        ESP_LOGE(TAG, "Failed to read existing file : %s", filepath);
-        /* Respond with 500 Internal Server Error */
-        httpd_resp_send_err(req, HTTPD_500_INTERNAL_SERVER_ERROR, "Failed to read existing file");
+        LogFile.WriteToFile(ESP_LOG_ERROR, TAG, "Failed to read existing file: %s!", filepath);
+        /* Respond with 404 Error */
+        httpd_resp_send_err(req, HTTPD_404_NOT_FOUND, get404());
         return ESP_FAIL;
     }
 
     httpd_resp_set_hdr(req, "Access-Control-Allow-Origin", "*");
 
-    ESP_LOGD(TAG, "Sending file : %s (%ld bytes)...", filename, file_stat.st_size);
+    ESP_LOGD(TAG, "Sending file: %s (%ld bytes)...", filename, file_stat.st_size);
     set_content_type_from_file(req, filename);
 
     /* Retrieve the pointer to scratch buffer for temporary storage */
@@ -599,7 +599,7 @@ static esp_err_t download_get_handler(httpd_req_t *req)
             /* Abort sending file */
             httpd_resp_sendstr_chunk(req, NULL);
             /* Respond with 500 Internal Server Error */
-            httpd_resp_send_err(req, HTTPD_500_INTERNAL_SERVER_ERROR, "Failed to send file");
+            httpd_resp_send_err(req, HTTPD_500_INTERNAL_SERVER_ERROR, "Failed to send file!");
             return ESP_FAIL;
         }
 
@@ -628,20 +628,21 @@ static esp_err_t upload_post_handler(httpd_req_t *req)
     const char *filename = get_path_from_uri(filepath, ((struct file_server_data *)req->user_ctx)->base_path,
                                              req->uri + sizeof("/upload") - 1, sizeof(filepath));
     if (!filename) {
-        /* Respond with 500 Internal Server Error */
-        httpd_resp_send_err(req, HTTPD_500_INTERNAL_SERVER_ERROR, "Filename too long");
+        /* Respond with 413 Error */
+        httpd_resp_send_err(req, HTTPD_414_URI_TOO_LONG, "Filename too long");
         return ESP_FAIL;
     }
 
     /* Filename cannot have a trailing '/' */
     if (filename[strlen(filename) - 1] == '/') {
-        ESP_LOGE(TAG, "Invalid filename : %s", filename);
-        httpd_resp_send_err(req, HTTPD_500_INTERNAL_SERVER_ERROR, "Invalid filename");
+        ESP_LOGE(TAG, "Invalid filename: %s", filename);
+        /* Respond with 400 Bad Request */
+        httpd_resp_send_err(req, HTTPD_400_BAD_REQUEST, "Invalid filename");
         return ESP_FAIL;
     }
 
     if (stat(filepath, &file_stat) == 0) {
-        ESP_LOGE(TAG, "File already exists : %s", filepath);
+        ESP_LOGE(TAG, "File already exists: %s", filepath);
         /* Respond with 400 Bad Request */
         httpd_resp_send_err(req, HTTPD_400_BAD_REQUEST, "File already exists");
         return ESP_FAIL;
@@ -649,7 +650,7 @@ static esp_err_t upload_post_handler(httpd_req_t *req)
 
     /* File cannot be larger than a limit */
     if (req->content_len > MAX_FILE_SIZE) {
-        ESP_LOGE(TAG, "File too large : %d bytes", req->content_len);
+        ESP_LOGE(TAG, "File too large: %d bytes", req->content_len);
         /* Respond with 400 Bad Request */
         httpd_resp_send_err(req, HTTPD_400_BAD_REQUEST,
                             "File size must be less than "
@@ -661,13 +662,13 @@ static esp_err_t upload_post_handler(httpd_req_t *req)
 
     fd = OpenFileAndWait(filepath, "w");
     if (!fd) {
-        ESP_LOGE(TAG, "Failed to create file : %s", filepath);
+        ESP_LOGE(TAG, "Failed to create file: %s", filepath);
         /* Respond with 500 Internal Server Error */
         httpd_resp_send_err(req, HTTPD_500_INTERNAL_SERVER_ERROR, "Failed to create file");
         return ESP_FAIL;
     }
 
-    ESP_LOGI(TAG, "Receiving file : %s...", filename);
+    ESP_LOGI(TAG, "Receiving file: %s...", filename);
 
     /* Retrieve the pointer to scratch buffer for temporary storage */
     char *buf = ((struct file_server_data *)req->user_ctx)->scratch;
@@ -679,7 +680,7 @@ static esp_err_t upload_post_handler(httpd_req_t *req)
 
     while (remaining > 0) {
 
-        ESP_LOGI(TAG, "Remaining size : %d", remaining);
+        ESP_LOGI(TAG, "Remaining size: %d", remaining);
         /* Receive the file part by part into a buffer */
         if ((received = httpd_req_recv(req, buf, MIN(remaining, SCRATCH_BUFSIZE))) <= 0) {
             if (received == HTTPD_SOCK_ERR_TIMEOUT) {
@@ -790,8 +791,8 @@ static esp_err_t delete_post_handler(httpd_req_t *req)
         const char *filename = get_path_from_uri(filepath, ((struct file_server_data *)req->user_ctx)->base_path,
                                                 req->uri  + sizeof("/delete") - 1, sizeof(filepath));
         if (!filename) {
-            /* Respond with 500 Internal Server Error */
-            httpd_resp_send_err(req, HTTPD_500_INTERNAL_SERVER_ERROR, "Filename too long");
+            /* Respond with 414 Error */
+            httpd_resp_send_err(req, HTTPD_414_URI_TOO_LONG, "Filename too long");
             return ESP_FAIL;
         }
         zw = std::string(filename);
@@ -824,19 +825,20 @@ static esp_err_t delete_post_handler(httpd_req_t *req)
 
         /* Filename cannot have a trailing '/' */
         if (filename[strlen(filename) - 1] == '/') {
-            ESP_LOGE(TAG, "Invalid filename : %s", filename);
-            httpd_resp_send_err(req, HTTPD_500_INTERNAL_SERVER_ERROR, "Invalid filename");
+            ESP_LOGE(TAG, "Invalid filename: %s", filename);
+            /* Respond with 400 Bad Request */
+            httpd_resp_send_err(req, HTTPD_400_BAD_REQUEST, "Invalid filename");
             return ESP_FAIL;
         }
 
         if (stat(filepath, &file_stat) == -1) {
-            ESP_LOGE(TAG, "File does not exist : %s", filename);
+            ESP_LOGE(TAG, "File does not exist: %s", filename);
             /* Respond with 400 Bad Request */
             httpd_resp_send_err(req, HTTPD_400_BAD_REQUEST, "File does not exist");
             return ESP_FAIL;
         }
 
-        ESP_LOGI(TAG, "Deleting file : %s", filename);
+        ESP_LOGI(TAG, "Deleting file: %s", filename);
         /* Delete file */
         unlink(filepath);
 
@@ -878,7 +880,7 @@ void delete_all_in_directory(std::string _directory)
     std::string filename;
 
     if (!dir) {
-        ESP_LOGE(TAG, "Failed to stat dir : %s", _directory.c_str());
+        ESP_LOGE(TAG, "Failed to stat dir: %s", _directory.c_str());
         return;
     }
 
@@ -887,7 +889,7 @@ void delete_all_in_directory(std::string _directory)
         if (!(entry->d_type == DT_DIR)){
             if (strcmp("wlan.ini", entry->d_name) != 0){                    // auf wlan.ini soll nicht zugegriffen werden !!!
                 filename = _directory + "/" + std::string(entry->d_name);
-                ESP_LOGI(TAG, "Deleting file : %s", filename.c_str());
+                ESP_LOGI(TAG, "Deleting file: %s", filename.c_str());
                 /* Delete file */
                 unlink(filename.c_str());    
             }

code/components/jomjol_fileserver_ota/server_help.cpp

@@ -36,13 +36,13 @@ esp_err_t send_file(httpd_req_t *req, std::string filename)
 {
     FILE *fd = OpenFileAndWait(filename.c_str(), "r");
     if (!fd) {
-        ESP_LOGE(TAG, "Failed to read existing file : %s", filename.c_str());
-        /* Respond with 500 Internal Server Error */
-        httpd_resp_send_err(req, HTTPD_500_INTERNAL_SERVER_ERROR, "Failed to read existing file");
+        ESP_LOGE(TAG, "Failed to read existing file: %s", filename.c_str());
+        /* Respond with 404 Error */
+        httpd_resp_send_err(req, HTTPD_404_NOT_FOUND, get404());
         return ESP_FAIL;
     }
 
-    ESP_LOGD(TAG, "Sending file : %s ...", filename.c_str());
+    ESP_LOGD(TAG, "Sending file: %s ...", filename.c_str());
 //    httpd_resp_set_hdr(req, "Access-Control-Allow-Origin", "*");
     set_content_type_from_file(req, filename.c_str());
 

code/components/jomjol_fileserver_ota/server_ota.cpp

@@ -530,7 +530,7 @@ esp_err_t handler_ota_update(httpd_req_t *req)
         int _result = stat(fn.c_str(), &file_stat);
         ESP_LOGD(TAG, "Ergebnis %d\n", _result);
         if (_result == 0) {
-            ESP_LOGD(TAG, "Deleting file : %s", fn.c_str());
+            ESP_LOGD(TAG, "Deleting file: %s", fn.c_str());
             /* Delete file */
             unlink(fn.c_str());
         }

code/components/jomjol_flowcontroll/ClassFlowControll.cpp

@@ -569,10 +569,10 @@ bool ClassFlowControll::ReadParameter(FILE* pfile, string& aktparamgraph)
 int ClassFlowControll::CleanTempFolder() {
     const char* folderPath = "/sdcard/img_tmp";
     
-    ESP_LOGD(TAG, "Clean up temporary folder to avoid damage of sdcard sectors : %s", folderPath);
+    ESP_LOGD(TAG, "Clean up temporary folder to avoid damage of sdcard sectors: %s", folderPath);
     DIR *dir = opendir(folderPath);
     if (!dir) {
-        ESP_LOGE(TAG, "Failed to stat dir : %s", folderPath);
+        ESP_LOGE(TAG, "Failed to stat dir: %s", folderPath);
         return -1;
     }
 
@@ -584,7 +584,7 @@ int ClassFlowControll::CleanTempFolder() {
 			if (unlink(path.c_str()) == 0) {
 				deleted ++;
 			} else {
-				ESP_LOGE(TAG, "can't delete file : %s", path.c_str());
+				ESP_LOGE(TAG, "can't delete file: %s", path.c_str());
 			}
         } else if (entry->d_type == DT_DIR) {
 			deleted += removeFolder(path.c_str(), TAG);
@@ -679,7 +679,7 @@ esp_err_t ClassFlowControll::GetJPGStream(std::string _fn, httpd_req_t *req)
 
     if (_send)
     {
-        ESP_LOGD(TAG, "Sending file : %s ...", _fn.c_str());
+        ESP_LOGD(TAG, "Sending file: %s ...", _fn.c_str());
         set_content_type_from_file(req, _fn.c_str());
         result = _send->SendJPGtoHTTP(req);
         ESP_LOGD(TAG, "File sending complete");    

code/components/jomjol_flowcontroll/ClassFlowImage.cpp

@@ -113,7 +113,7 @@ void ClassFlowImage::RemoveOldLogs()
 
     DIR *dir = opendir(LogImageLocation.c_str());
     if (!dir) {
-        ESP_LOGE(TAG, "Failed to stat dir : %s", LogImageLocation.c_str());
+        ESP_LOGE(TAG, "Failed to stat dir: %s", LogImageLocation.c_str());
         return;
     }
 

code/components/jomjol_helper/Helper.cpp

@@ -304,7 +304,7 @@ size_t findDelimiterPos(string input, string delimiter)
 
 bool RenameFile(string from, string to)
 {
-//	ESP_LOGI(logTag, "Deleting file : %s", fn.c_str());
+//	ESP_LOGI(logTag, "Deleting file: %s", fn.c_str());
 	/* Delete file */
 	FILE* fpSourceFile = OpenFileAndWait(from.c_str(), "rb");
 	if (!fpSourceFile)	// Sourcefile existiert nicht sonst gibt es einen Fehler beim Kopierversuch!
@@ -321,7 +321,7 @@ bool RenameFile(string from, string to)
 
 bool DeleteFile(string fn)
 {
-//	ESP_LOGI(logTag, "Deleting file : %s", fn.c_str());
+//	ESP_LOGI(logTag, "Deleting file: %s", fn.c_str());
 	/* Delete file */
 	FILE* fpSourceFile = OpenFileAndWait(fn.c_str(), "rb");
 	if (!fpSourceFile)	// Sourcefile existiert nicht sonst gibt es einen Fehler beim Kopierversuch!
@@ -512,7 +512,7 @@ int removeFolder(const char* folderPath, const char* logTag) {
 
 	DIR *dir = opendir(folderPath);
     if (!dir) {
-        ESP_LOGE(logTag, "Failed to stat dir : %s", folderPath);
+        ESP_LOGE(logTag, "Failed to stat dir: %s", folderPath);
         return -1;
     }
 
@@ -525,7 +525,7 @@ int removeFolder(const char* folderPath, const char* logTag) {
 			if (unlink(path.c_str()) == 0) {
 				deleted ++;
 			} else {
-				ESP_LOGE(logTag, "can't delete file : %s", path.c_str());
+				ESP_LOGE(logTag, "can't delete file: %s", path.c_str());
 			}
         } else if (entry->d_type == DT_DIR) {
 			deleted += removeFolder(path.c_str(), logTag);
@@ -534,7 +534,7 @@ int removeFolder(const char* folderPath, const char* logTag) {
     
     closedir(dir);
 	if (rmdir(folderPath) != 0) {
-		ESP_LOGE(logTag, "can't delete folder : %s", folderPath);
+		ESP_LOGE(logTag, "can't delete folder: %s", folderPath);
 	}
 	ESP_LOGD(logTag, "%d files in folder %s deleted.", deleted, folderPath);
 
@@ -791,3 +791,14 @@ string getResetReason(void) {
 	}
     return reasonText;
 }
+
+const char* get404(void) {
+    return 
+"<pre>\n\n\n\n"
+"        _\n"
+"    .__(.)< ( oh oh! This page does not exist! )\n"
+"    \\___)\n"
+"\n\n"
+"                You could try your <a href=index.html target=_parent>luck</a> here!</pre>\n"
+"<script>document.cookie = \"page=overview.html\"</script>"; // Make sure we load the overview page
+}

code/components/jomjol_helper/Helper.h

@@ -63,4 +63,6 @@ string getSDCardCapacity();
 string getSDCardSectorSize();
 
 string getMac(void);
-string getResetReason(void);
+string getResetReason(void);
+
+const char* get404(void);

code/components/jomjol_image_proc/CImageBasis.cpp

@@ -453,7 +453,7 @@ CImageBasis::CImageBasis(std::string _image)
     RGBImageRelease();
 
     zwld = esp_get_free_heap_size();
-    ESP_LOGD(TAG, "freeheapsize after : %ld", zwld);
+    ESP_LOGD(TAG, "freeheapsize after: %ld", zwld);
 
     std::string zw = "Image Load failed:" + _image;
     if (rgb_image == NULL)

code/components/jomjol_logfile/ClassLogFile.cpp

@@ -315,7 +315,7 @@ void ClassLogFile::RemoveOldLogFile()
 
     DIR *dir = opendir(logroot.c_str());
     if (!dir) {
-        ESP_LOGE(TAG, "Failed to stat dir : %s", logroot.c_str());
+        ESP_LOGE(TAG, "Failed to stat dir: %s", logroot.c_str());
         return;
     }
 
@@ -324,14 +324,14 @@ void ClassLogFile::RemoveOldLogFile()
     int notDeleted = 0;
     while ((entry = readdir(dir)) != NULL) {
         if (entry->d_type == DT_REG) {
-            //ESP_LOGD(TAG, "compare log file : %s to %s", entry->d_name, cmpfilename);
+            //ESP_LOGD(TAG, "compare log file: %s to %s", entry->d_name, cmpfilename);
             if ((strlen(entry->d_name) == strlen(cmpfilename)) && (strcmp(entry->d_name, cmpfilename) < 0)) {
-                //ESP_LOGD(TAG, "delete log file : %s", entry->d_name);
+                //ESP_LOGD(TAG, "delete log file: %s", entry->d_name);
                 std::string filepath = logroot + "/" + entry->d_name; 
                 if (unlink(filepath.c_str()) == 0) {
                     deleted ++;
                 } else {
-                    ESP_LOGE(TAG, "can't delete file : %s", entry->d_name);
+                    ESP_LOGE(TAG, "can't delete file: %s", entry->d_name);
                     notDeleted ++;
                 }
             } else {
@@ -366,7 +366,7 @@ void ClassLogFile::RemoveOldDataLog()
 
     DIR *dir = opendir(dataroot.c_str());
     if (!dir) {
-        ESP_LOGE(TAG, "Failed to stat dir : %s", dataroot.c_str());
+        ESP_LOGE(TAG, "Failed to stat dir: %s", dataroot.c_str());
         return;
     }
 
@@ -375,14 +375,14 @@ void ClassLogFile::RemoveOldDataLog()
     int notDeleted = 0;
     while ((entry = readdir(dir)) != NULL) {
         if (entry->d_type == DT_REG) {
-            //ESP_LOGD(TAG, "Compare data file : %s to %s", entry->d_name, cmpfilename);
+            //ESP_LOGD(TAG, "Compare data file: %s to %s", entry->d_name, cmpfilename);
             if ((strlen(entry->d_name) == strlen(cmpfilename)) && (strcmp(entry->d_name, cmpfilename) < 0)) {
-                //ESP_LOGD(TAG, "delete data file : %s", entry->d_name);
+                //ESP_LOGD(TAG, "delete data file: %s", entry->d_name);
                 std::string filepath = dataroot + "/" + entry->d_name; 
                 if (unlink(filepath.c_str()) == 0) {
                     deleted ++;
                 } else {
-                    ESP_LOGE(TAG, "can't delete file : %s", entry->d_name);
+                    ESP_LOGE(TAG, "can't delete file: %s", entry->d_name);
                     notDeleted ++;
                 }
             } else {

code/main/server_main.cpp

@@ -241,8 +241,8 @@ esp_err_t hello_main_handler(httpd_req_t *req)
 
     if (!filename) {
         ESP_LOGE(TAG, "Filename is too long");
-        /* Respond with 500 Internal Server Error */
-        httpd_resp_send_err(req, HTTPD_500_INTERNAL_SERVER_ERROR, "Filename too long");
+        /* Respond with 414 Error */
+        httpd_resp_send_err(req, HTTPD_414_URI_TOO_LONG, "Filename too long");
         return ESP_FAIL;
     }
 

sd-card/html/index.html

@@ -15,7 +15,7 @@
 <script>
     async function loadPage(page) {
         console.log("loadPage(" + page + ")");
-        document.cookie = page;
+        document.cookie = "page="+page;
         document.getElementById('maincontent').src = page;
 
         [].forEach.call(document.querySelectorAll('.submenu'), function (el) {