R – How to detect a HTTP response, parse the xml and save to a NSString

asihttprequestiphonensstringobjective cxml

I've been trying to figure this out for weeks and i still get nothing. I am using the ASIHTTPRequest and ive successfully sent the data to a server and now I need to get the response XML,parse it and save the elements to each labeled NSString so I can post it to the server. Does anyone have an idea on how to do this?

Best Answer

From looking at the How to Use page, I think what you want to do is implement methods that can be called when the request is complete. For example, say you have a method done: that you want to be called when your request completes. You can set that method as your "finished" selector on the request:

NSURL *url = [NSURL URLWithString:@"http://allseeing-i.com"];
ASIHTTPRequest *request = [[[ASIHTTPRequest alloc] initWithURL:url] autorelease];
[request setDelegate:self];
[request setDidFinishSelector:@selector(done:)];

Then later, you implement the done: method:

- (void)done:(ASIHTTPRequest *)request
{
   NSString *response = [request responseString];
}

This is all assuming you're sending the requests asynchronously; if you're using synchronous calls, you can just use the responseString property on the request.

Related Solutions

C# – How to read and parse an XML file in C#

XmlDocument to read an XML from string or from file.

XmlDocument doc = new XmlDocument();
doc.Load("c:\\temp.xml");

doc.LoadXml("<xml>something</xml>");

then find a node below it ie like this

XmlNode node = doc.DocumentElement.SelectSingleNode("/book/title");

foreach(XmlNode node in doc.DocumentElement.ChildNodes){
   string text = node.InnerText; //or loop through its children as well
}

then read the text inside that node like this

string text = node.InnerText;

or read an attribute

string attr = node.Attributes["theattributename"]?.InnerText

Always check for null on Attributes["something"] since it will be null if the attribute does not exist.

Python – How to parse XML and count instances of a particular node attribute

I suggest ElementTree. There are other compatible implementations of the same API, such as lxml, and cElementTree in the Python standard library itself; but, in this context, what they chiefly add is even more speed -- the ease of programming part depends on the API, which ElementTree defines.

First build an Element instance root from the XML, e.g. with the XML function, or by parsing a file with something like:

import xml.etree.ElementTree as ET
root = ET.parse('thefile.xml').getroot()

Or any of the many other ways shown at ElementTree. Then do something like:

for type_tag in root.findall('bar/type'):
    value = type_tag.get('foobar')
    print(value)

And similar, usually pretty simple, code patterns.

Best Answer

Related Solutions

C# – How to read and parse an XML file in C#

Python – How to parse XML and count instances of a particular node attribute

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