SigServer DEV: Difference between revisions

SigServer DEV (view source)

Revision as of 21:43, 12 February 2007

3,207 bytes added , 12 February 2007

no edit summary

EvoGT

2

edits

@@ Line 78: / Line 78: @@
 The mylist export documentation may be helpful in understanding the meaning of the different fields in the XML replies: [[Mylist_export_template_guidelines]]
+==XML Parsing==
+To use the XML replies from the server, they have to be parsed and probably cached.
+To parse the XML, standard php-commands can be used.
+working example for xml.xml with the output array stack().:
+{|  width="70%"
+|<pre><nowiki>
+//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+//Load and parse XML
+//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+$file = "xml.xml";
+$stack = array();
+// start_element_handler ( resource parser, string name, array attribs )
+function startElement($parser, $name, $attribs)
+{
+   global $stack;
+   $tag=array("name"=>$name,"attribs"=>$attribs);
+   array_push($stack,$tag);
+}
+// end_element_handler ( resource parser, string name )
+function endElement($parser, $name)
+{
+   global $stack;
+   $stack[count($stack)-2]['children'][] = $stack[count($stack)-1];
+   array_pop($stack);
+}
+// handler ( resource parser, string data )
+function characterData($parser, $data)
+{
+   global $stack,$i;
+   if(trim($data))
+   {
+             $stack[count($stack)-1]['data'] .= $data;
+   }
+}
+// handler ( resource parser, string target, string data )
+function defaultHandler($parser, $data)
+{
+}
+function externalEntityRefHandler($parser, $openEntityNames, $base, $systemId,
+                                 $publicId) {
+   if ($systemId) {
+       if (!list($parser, $fp) = new_xml_parser($systemId)) {
+           printf("Could not open entity %s at %s\n", $openEntityNames,
+                   $systemId);
+           return false;
+       }
+       while ($data = fread($fp, 4096)) {
+           if (!xml_parse($parser, $data, feof($fp))) {
+               printf("XML error: %s at line %d while parsing entity %s\n",
+                       xml_error_string(xml_get_error_code($parser)),
+                       xml_get_current_line_number($parser), $openEntityNames);
+               xml_parser_free($parser);
+               return false;
+           }
+       }
+       xml_parser_free($parser);
+       return true;
+   }
+   return false;
+}
+function new_xml_parser($file)
+{
+   global $parser_file;
+   $xml_parser = xml_parser_create();
+   xml_parser_set_option($xml_parser, XML_OPTION_CASE_FOLDING, 0);
+   xml_set_processing_instruction_handler($xml_parser, "PIHandler");
+   xml_set_element_handler($xml_parser, "startElement", "endElement");
+   xml_set_character_data_handler($xml_parser, "characterData");
+   xml_set_default_handler($xml_parser, "defaultHandler");
+   xml_set_external_entity_ref_handler($xml_parser, "externalEntityRefHandler");
+   if (!($fp = @fopen($file, "r"))) {
+       return false;
+   }
+   if (!is_array($parser_file)) {
+       settype($parser_file, "array");
+   }
+   $parser_file[$xml_parser] = $file;
+   return array($xml_parser, $fp);
+}
+if (!(list($xml_parser, $fp) = new_xml_parser($file))) {
+   die("could not open XML input");
+}
+//ERROR
+while ($data = fread($fp, 4096)) {
+   if (!xml_parse($xml_parser, $data, feof($fp))) {
+       die(sprintf("XML error: %s at line %d\n",
+                   xml_error_string(xml_get_error_code($xml_parser)),
+                   xml_get_current_line_number($xml_parser)));
+   }
+}
+//END
+xml_parser_free($xml_parser);
+</nowiki></pre>
+|}