implemented better error messages and fixed upload size errors

docker/Dockerfile

@@ -23,6 +23,9 @@ RUN mkdir -p /var/log/nginx
 # php stuff
 RUN sed -i 's/nobody/nginx/g' /etc/php83/php-fpm.d/www.conf
 RUN sed -i 's/E_ALL \& ~E_DEPRECATED \& ~E_STRICT/E_ALL \& ~E_DEPRECATED \& ~E_STRICT \& ~E_NOTICE \& ~E_WARNING/g' /etc/php83/php.ini
+# disable upload file size limit
+RUN sed -i 's/upload_max_filesize = 2M/upload_max_filesize = 0/g' /etc/php83/php.ini
+RUN sed -i 's/post_max_size = 8M/post_max_size = 0/g' /etc/php83/php.ini
 
 # web interface stuff
 WORKDIR /var/www/backupdrop/web/lib

web/index.php

@@ -82,8 +82,14 @@ function handleUpload($hostname)
     }
     else //some upload error
     {
-        http_response_code(404);
-        return ['status'=>'error','reason'=>'No file uploaded'];
+        $error = $_FILES["file"]["error"];
+        if($error == 1 || $error == 2)
+            http_response_code(413);
+        else if($error == 3)
+            http_response_code(500);
+        else
+            http_response_code(404);
+        return ['status'=>'error','reason'=>'No file uploaded','error'=>uploadErrorTranslator($error)];
     }
 }
 

web/lib/helpers.php

@@ -72,4 +72,18 @@ function endsWith( $haystack, $needle ) {
        return true;
    }
    return substr( $haystack, -$length ) === $needle;
+}
+
+function uploadErrorTranslator($code){
+    return  match ($code)
+    {
+        0 => 'There is no error, the file uploaded with success',
+        1 => 'The uploaded file exceeds the upload_max_filesize directive in php.ini',
+        2 => 'The uploaded file exceeds the MAX_FILE_SIZE directive that was specified in the HTML form',
+        3 => 'The uploaded file was only partially uploaded',
+        4 => 'No file was uploaded',
+        6 => 'Missing a temporary folder',
+        7 => 'Failed to write file to disk.',
+        8 => 'A PHP extension stopped the file upload.'
+    };
 }