I am trying to chain the http requests using NodeJs Request modules.
Example:
var options = {
url: 'http://example.com'
};
request.get(options, function(error, response, body){
var first = JSON.parse(body);
options.url = 'http://example.com/second' + first.id;
//nested second request
request.get(options, function(error, response, body){
var second = JSON.parse(body);
options.url = 'http://example.com/third' + second.title;
//another nested request
request.get(options, function(error, response, body){
var third = JSON.parse(body);
return third;
});
})
})
Is there a better way to do the chained promised?
The Request library does not support promises directly . You can use request-promise
(or request-promise-native
if using ES6) to use Promises with request
:
// run `npm install request request-promise` first
var request = require('request-promise');
var options = {
uri: 'http://example.com',
json: true // Automatically parses the JSON string in the response
};
request.get(options).then(function(body){
//second request
options.url = 'http://example.com/second' + body.id;
return request.get(options)
}).then(function(body){
//third request
options.url = 'http://example.com/third' + body.title;
return request.get(options)
}).then(function(body){
return body;
}).catch(function(error){
// error handling
});
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