In azure functions using javascript how to call send request to a endpoint

Question

In Azure function how to call an API using javascript. The request is POST with the header.I tried to use XMLHttpRequest, but i got exception like this XMLHttpRequest is not defined.

var client = new XMLHttpRequest();
    var authentication = 'Bearer ...'
    var url = "http://example.com";
    var data = '{.........}';

    client.open("POST", url, true);
    client.setRequestHeader('Authorization',authentication); 
    client.setRequestHeader('Content-Type', 'application/json');

    client.send(data);

Any other method is there to achive this,

I need to call an endpoint which accepts POST method with cookie in header which I'll pass. But I am facing problem in achieving this. — ashok
– ashok, Commented Jun 12, 2018 at 20:27
What is your Azure Functions language? Also like @David suggested can you post your current code? — KWilson
– KWilson, Commented Jun 12, 2018 at 20:28

Jerry Liu · Accepted Answer · 2018-06-15 06:02:59Z

9

You can do it with a built-in http module (standard one for node.js):

var http = require('http');

module.exports= function (context) {
  context.log('JavaScript HTTP trigger function processed a request.');

  var options = {
      host: 'example.com',
      port: '80',
      path: '/test',
      method: 'POST'
  };

  // Set up the request
  var req = http.request(options, (res) => {
    var body = "";

    res.on("data", (chunk) => {
      body += chunk;
    });

    res.on("end", () => {
      context.res = body;
      context.done();
    });
  }).on("error", (error) => {
    context.log('error');
    context.res = {
      status: 500,
      body: error
    };
    context.done();
  });
  req.end();
};

You can also use any other npm module like request if you install it into your Function App.

edited Jun 15, 2018 at 6:02

Jerry Liu

17.9k4 gold badges47 silver badges66 bronze badges

answered Jun 12, 2018 at 18:53

Mikhail Shilkov

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7 Comments

Mikhail Shilkov Over a year ago

That could mean it works :) Have a look at logs and response to understand the reason.

ashok Over a year ago

can i replace host,port and path with url. As I saw in some examples.

Mikhail Shilkov Over a year ago

You can make any valid use of http or https modules that you find in any Node.js example online, it's no different here

ashok Over a year ago

in log i'm getting 2018-06-12T21:08:14.299 [Error] Exception while executing function: Functions.HttpTriggerJS1. mscorlib: One or more errors occurred. Error: Cannot find module 'request'

Mikhail Shilkov Over a year ago

Hmm... My code has no reference to request module.

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