Titanium for iOS: POST a JSON Object to a Web Service

Assume I’m using the boilerplate Ti.Network.createHTTPClient call with an “onload” & “onerror”.

...
    var xhr = Ti.Network.createHTTPClient({ ... });    
 
    myObj = { mydata:  
        { myitems: [ 
                { mainID:7452, someOption:87, theDate:'2012-10-23' },
                { mainID:2342, someOption:27, theDate:'2011-06-03' },
                { mainID:1914, someOption:43, theDate:'2012-02-14' }
            ]
        }
    };
...
    var strMyObj = JSON.stringify(myObj);
	Ti.API.info("strMyObj = " + strMyObj);

    xhr.open("POST", "http://www.yourPathHere.com/yourWebServiceName");
	xhr.setRequestHeader('Accept','application/json'); 
	xhr.setRequestHeader('Content-Type','application/json'); 				
	xhr.send( strMyObj ); 
...

Works in CURL, not in Titanium

I ran into this issue first. The following CURL command worked in Terminal:

curl -i -H "Accept: application/json" -H "Content-Type: application/json" -X POST -d "{mydata:{myitems:[{mainID:7452, someOption:87, theDate:'2012-10-23'}]}}"
 http://www.yourPathHere.com/yourWebServiceName

In Titanium I kept getting HTTP response status “403” because I made stupid mistake, using “PUT” instead of “POST” in xhr.open(). Good times.
The “-i” stands for “include”, “-H” specifies an HTTP header. The “-X” in front of “POST” tells curl to use something other than “GET”. “-d” stands for data to include in your HTTP POST, mimicking an HTML form request. Here’s a list of CURL flags.

JSON.stringify

After fixing that, I got HTTP response status “500”, by just doing “xhr.send(myObj);”.

Thanks to some debugging by my backend dev Wes, it turned out the service simply wanted the data formatted as a String. He tried, taking the quotes off the {mydata…} line in the CURL command and got the same status 500 error in Terminal and via Chrome’s console:

curl -i -H "Accept: application/json" -H "Content-Type: application/json" -X POST -d {mydata:{myitems:[{mainID:7452, someOption:87, theDate:'2012-10-23'}]}} 
 http://www.yourPathHere.com/yourWebServiceName

curl: (6) Could not resolve host: someOption:87,; nodename nor servname provided, or not known
curl: (3) [globbing] unmatched close brace/bracket at pos 19
HTTP/1.1 500 Internal Server Error
Date: Fri, 05 Dec 2012 18:58:48 GMT
Server:...
jsonerror: true
Cache-Control: private
Content-Type: application/json; charset=utf-8
Content-Length: 1761
{"Message":"Invalid object passed in, \u0027:\u0027 or \u0027}\u0027 expected. (31): {mydata:{entries:[{mainID:7452,","StackTrace":"   at..."}
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