Invoke node.js api from WSO2

Question

I am trying to invoke a node.js REST api (http://localhost:3000/users) from WSO2 Api Mgmt on-prem configuration but it doesn't work. The node.js REST api works fine from a browser/Postman. When called from WSO2, it returns empty response.

Endpoint exposed from WSO2 AM is http://localhost:801/api/v1/users and it is supposed to call the node.js REST api. I tried to use the debug features in WSO2 and found that the call never reaches the node.js endpoint due to some very long exception dump displayed in the console.

I am using Authorization header for the WSO2 front and it seems to work fine.

Though I have worked a bit in node.js, I am super-new to WSO2. So any help will be much appreciated.

Edit: I am using WSO2 AM 1.9.0 Response body from WSO2 API console given below -

<html>
<head>
    <title>Apache Tomcat/7.0.55 - Error report</title>
    <style>
        <!
        --H1
        {
            font-family: Tahoma,Arial,sans-serif;
            color: white;
            background-color: #525D76;
            font-size: 22px;
        }
        H2
        {
            font-family: Tahoma,Arial,sans-serif;
            color: white;
            background-color: #525D76;
            font-size: 16px;
        }
        H3
        {
            font-family: Tahoma,Arial,sans-serif;
            color: white;
            background-color: #525D76;
            font-size: 14px;
        }
        BODY
        {
            font-family: Tahoma,Arial,sans-serif;
            color: black;
            background-color: white;
        }
        B
        {
            font-family: Tahoma,Arial,sans-serif;
            color: white;
            background-color: #525D76;
        }
        P
        {
            font-family: Tahoma,Arial,sans-serif;
            background: white;
            color: black;
            font-size: 12px;
        }
        A
        {
            color: black;
        }
        A.name
        {
            color: black;
        }
        HR
        {
            color: #525D76;
        }
        -- ></style>
</head>
<body>
    <h1>
        HTTP Status 405 - HTTP method GET is not supported by this URL</h1>
    <hr size="1" noshade="noshade">
    <p>
        <b>type</b> Status report</p>
    <p>
        <b>message</b> <u>HTTP method GET is not supported by this URL</u></p>
    <p>
        <b>description</b> <u>The specified HTTP method is not allowed for the requested resource.</u></p>
    <hr size="1" noshade="noshade">
    <h3>
        Apache Tomcat/7.0.55</h3>
</body>
</html>

Edit : API Manager log

[2015-06-23 14:36:04,903]  INFO - HandlerUtils Massage Info: Transaction id=1499
743816386524554259  Message direction=IN  Server name=192.168.1.5:9763  Timestam
p=1435050364903  Service name=__SynapseService  Operation Name=mediate
[2015-06-23 14:36:04,906] DEBUG - HTTPEndpoint Sending message through endpoint
: admin--GetUsers_APIproductionEndpoint_0 resolving to address = http://127.0.0.
1:3000/users
[2015-06-23 14:36:04,909] DEBUG - HTTPEndpoint SOAPAction: null
[2015-06-23 14:36:04,910] DEBUG - HTTPEndpoint WSA-Action: null
[2015-06-23 14:36:04,926]  INFO - HandlerUtils Massage Info: Transaction id=1499
743816386524554259  Message direction=OUT  Server name=192.168.1.5:9763  Timesta
mp=1435050364926  Service name=__SynapseService  Operation Name=mediate

Edit : Remaining details from API log

Curl curl -X GET --header "Accept: application/json" --header "Authorization: Bearer 6a931d4fb2f6c85be750ee7cea8bc094" "https://localhost:9443/api/v1/users"

Request URL https://localhost:9443/api/v1/users

Response Code 405 Response Headers { "date": "Tue, 23 Jun 2015 09:05:49 GMT", "server": "WSO2 Carbon Server", "content-type": "text/html;charset=utf-8", "content-length": "1065", "content-language": "en" }

Please attach the error logs here, so we can help you on this. — Abimaran Kugathasan
Can you attach the screen shot of the API Console? And also, were you able to invoke this API through Postman cREST client? — Abimaran Kugathasan

John Desilva John Desilva · Accepted Answer · 2017-03-26T18:17:39

You have to check the GET checkbox value while giving the endpoint address.

Use this API sequence

<?xml version="1.0" encoding="UTF-8"?>
<api xmlns="http://ws.apache.org/ns/synapse"
     name="nodejsAPI"
     context="/api">
   <resource methods="GET" protocol="http" uri-template="/v1/users">
      <inSequence>
         <log level="full"/>
         <send>
            <endpoint>
               <http method="GET"
                     uri-template="http://localhost:3000/users/"/>
            </endpoint>
         </send>
      </inSequence>
      <outSequence>
         <send/>
      </outSequence>
      <faultSequence/>
   </resource>
</api>

Invoke node.js api from WSO2

2 Answers