Error consuming json service

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preben's picture
Submitted by preben on June 11, 2010 - 09:29
im not able to use a json response in mashup. Error: org.apache.axis2.AxisFault: com.ctc.wstx.exc.WstxUnexpectedCharException: Unexpected character '{' (code 123) in prolog; expected '<' at [row,col {unknown-source}]: [2,2] example getNowNext.safe = true; getNowNext.httpMethod = "GET"; getNowNext.outputType = "xml"; function getNowNext() { var nownext = new WSRequest(); var options = new Array(); options.useSOAP = false; options.HTTPMethod = "GET"; options.HTTPInputSerialization = "application/json" nownext.open(options, "http://somejsonresponseurl",false); var request = null; nownext.send(request); return nownext.responseXML; } axis2.xml has been set to use messageformatters : and messagebuilders I have created a jira MASHUP-1354 for this. As it seems to be an error. Are there any workarounds? Thanks Preben
‹ Writing a helloWorld client problem How to use basic mashup functionalities like filter, combine, sort etc. ›
tyrell's picture

Hi, You can use the new

Submitted by tyrell on June 11, 2010 - 10:02.
Hi, You can use the new HTTPClient Host Object (http://wso2.org/project/mashup/2.1.0/docs/httpclienthostobject.html) for these types of services. The above problem with WSRequest HS occurs due it sending every response through the XML parser. If the end-point you are invoking is RESTy and might return non-xml, HTTPClient HS is the best alternative. Tyrell
preben's picture

I have been looking at that

Submitted by preben on June 11, 2010 - 11:02.
I have been looking at that at it works. Now I only need a nifty way of converting json back to xml, so I can expose it as a composite mashup xml service. HttpClient doesnt't support something like responseXML. Do you have any other suggestions on how to convert from json to xml in a mashup ? Thanks Preben
tyrell's picture

Here's a sample javascript

Submitted by tyrell on June 15, 2010 - 09:40.
Here's a sample javascript code that converts a string to E4X. var my-variable = new XML('xml-string-here'); Also have a look at http://wso2.org/project/mashup/2.0.2/docs/e4xquickstart.html for more E4X tips and tricks :) Tyrell
preben's picture

Yes well the problem is that

Submitted by preben on June 15, 2010 - 22:06.
Yes well the problem is that json needs to be converted back to xml before I can use it as a XML var for further mashup. So the task is to have a function jsonToXML. Preben
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