Call REST WebServices via HTTP Adapter MFP 7.1

Question

We are developing IONIC App using MFP7.1. We are trying to call REST webservice to get some data using HTTP Adapter.

I have the following adapter implementation file,

 function getFeed(username,password) {
  var data = {
    "username" : username,
    "password" : password
  };

    var input = {
        method : 'post',
        returnedContentType : 'plain',
        path : 'PATH HERE',
     body: {
        content: data.toString(),
        contentType: 'application/json; charset=utf-8;',
      },
    };
  return WL.Server.invokeHttp(input);
 }

And here is the adapter.xml,

<mfp:adapter name="http"
             xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
             xmlns:mfp="http://www.ibm.com/mfp/integration"
             xmlns:http="http://www.ibm.com/mfp/integration/http">
  <displayName>http</displayName>
    <description>http</description>
    <connectivity>
        <connectionPolicy xsi:type="http:HTTPConnectionPolicyType">
            <protocol>http</protocol>
      <domain>DOMAIN NAME HERE</domain>
      <port>PORT NO HERE</port>
            <connectionTimeoutInMilliseconds>30000</connectionTimeoutInMilliseconds>
            <socketTimeoutInMilliseconds>30000</socketTimeoutInMilliseconds>
            <maxConcurrentConnectionsPerNode>50</maxConcurrentConnectionsPerNode>
        </connectionPolicy>
    </connectivity>
  <procedure name="getFeed"/>
</mfp:adapter>

We did the following to call the adapter within my ionic provider,

 var resourceRequest = new WLResourceRequest("adapters/http/getFeed", WLResourceRequest.GET);
   resourceRequest.setQueryParameter("params", "['username', 'password']");
   resourceRequest.send().then(
       function(response) {
            alert('response   '+JSON.stringify(response.responseText));
       },
       function(response) {
            alert("HTTP Failure  "+JSON.stringify(response));
       }
   );

I am getting the following error in the error log,

"errors\\":[],\\"info\\""statuscode\\":400}","responseJSON":{"statusReason":"Bad Request","responseHeaders":{"Transfer-Encoding":"chunked","Server":"Apache-Coyote/1.1","Connection":"close","Content-Type":"text/plain"},"isSuccessful":true,"Can not deserialize instance of WEBSERVICE entity here.User out of START_ARRAY token\\n at[Siyrce.org.apache.catal.inc.connector.......

Answer 1

Per the suggestion in the comments, try changing .toString() to JSON.stringify :

content:
    JSON.stringify(data)