Fixed remote CSV uploading issue when allow_url_fopen option is disabled in php.ini

Author: Eugene Manuilov

classes/Visualizer/Source/Csv.php

@@ -93,6 +93,22 @@ private function _fetchSeries( &$handle ) {
 		return true;
 	}
 
+	/**
+	 * Returns file handle to fetch data from.
+	 *
+	 * @since 1.4.2
+	 *
+	 * @access protected
+	 * @param string $filename Optional file name to get handle. If omitted, $_filename is used.
+	 * @return resource File handle resource on success, otherwise FALSE.
+	 */
+	protected function _get_file_handle( $filename = false ) {
+		// set line endings auto detect mode
+		@ini_set( 'auto_detect_line_endings', true );
+		// open file and return handle
+		return fopen( $filename ? $filename : $this->_filename, 'rb' );
+	}
+
 	/**
 	 * Fetches information from source, parses it and builds series and data arrays.
 	 *
@@ -107,11 +123,8 @@ public function fetch() {
 			return false;
 		}
 
-		// set line endings auto detect mode
-		@ini_set( 'auto_detect_line_endings', true );
-
 		// read file and fill arrays
-		$handle = fopen( $this->_filename, 'rb' );
+		$handle = $this->_get_file_handle();
 		if ( $handle ) {
 			// fetch series
 			if ( !$this->_fetchSeries( $handle ) ) {

classes/Visualizer/Source/Csv/Remote.php

@@ -115,4 +115,25 @@ public function getSourceName() {
 		return __CLASS__;
 	}
 
+	/**
+	 * Returns file handle to fetch data from.
+	 *
+	 * @since 1.4.2
+	 *
+	 * @access protected
+	 * @param string $filename Optional file name to get handle. If omitted, $_filename is used.
+	 * @return resource File handle resource on success, otherwise FALSE.
+	 */
+	protected function _get_file_handle( $filename = false ) {
+		$scheme = parse_url( $this->_filename, PHP_URL_SCHEME );
+		$allow_url_fopen = filter_var( ini_get( 'allow_url_fopen' ), FILTER_VALIDATE_BOOLEAN );
+		if ( $allow_url_fopen && in_array( $scheme, stream_get_wrappers() ) ) {
+			return parent::_get_file_handle( $filename );
+		}
+
+		$filename = download_url( $this->_filename );
+
+		return !is_wp_error( $filename ) ? parent::_get_file_handle( $filename ) : false;
+	}
+
 }

readme.txt

@@ -58,6 +58,9 @@ Pay attention that to turn your shortcodes into graphs, your theme has to have `
 
 == Changelog ==
 
+= 1.4.2 =
+* Fixed remote CSV uploading issue when allow_url_fopen option is disabled in php.ini
+
 = 1.4.1.1 =
 * Removed CSV parser escape constant to prevent warnings which appears when PHP 5.2.x or less is used