Gdataxmlnode -- XML Processing

Gdataxmlnode is a class set provided by Google for XML data processing. This set encapsulates the libxml2-DOM processing method, can read and write small or medium XML documents, and supports XPath syntax.

Obtain the gdataxmlnode. h and gdataxmlnode. M files, and import the files to the xcode project as follows:

1. Add the gdataxmlnode. h/m file to the project;

2. Add the "libxml2.dylib" Library to the project;

3. On the "build Settings" page of the project, locate the "header search path" and add "/usr/include/libxml2" to the path.

Add the "gdataxmlnode. H" file to any file. If the project can be compiled, the gdataxmlnode is successfully added.

Take generating a SOAP request as an example to show how to use this type of set.

The soap request to be generated:

<?xml version="1.0" encoding="utf-8"?><soap:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/" xmlns="http://www.example.com/mobile/2010"><soap:Body><getProductAd/></soap:Body></soap:Envelope>

Code used:

     //SOAP Envelope    GDataXMLElement *envelope = [GDataXMLElement elementWithName:@"SOAP-ENV:Envelope"];        GDataXMLNode *soapNS = [GDataXMLNode namespaceWithName:@"SOAP-ENV" stringValue:@"http://schemas.xmlsoap.org/soap/envelope/"];    GDataXMLNode *xsiNS = [GDataXMLNode namespaceWithName:@"xsi" stringValue:@"http://www.w3.org/2001/XMLSchema-instance"];    GDataXMLNode *xsdNS = [GDataXMLNode namespaceWithName:@"xsd" stringValue:@"http://www.w3.org/2001/XMLSchema"];    GDataXMLNode *defaultNS = [GDataXMLNode namespaceWithName:@"" stringValue:@"http://www.example/mobile/2010"];        NSArray *namespaces = [NSArray arrayWithObjects:xsiNS, xsdNS, soapNS, defaultNS, nil];    [envelope setNamespaces:namespaces];        //SOAP Body    GDataXMLElement *body = [GDataXMLElement elementWithName:@"SOAP-ENV:Body"];        //SOAP Value    GDataXMLElement *value = [GDataXMLElement elementWithName:@"getProductAd"];    [body addChild:value];        [envelope addChild:body];        //SOAP Document    GDataXMLDocument *doc = [[GDataXMLDocument alloc] initWithRootElement:envelope];    [doc setCharacterEncoding:@"utf-8"];        NSLog(@"doc = %@", [NSString stringWithCString:(const char *)[[doc XMLData] bytes] encoding:NSUTF8StringEncoding]);