Develop Reference

Invoke AWS REST API in java-script

I am trying to execute AWS Endpoint using nodejs (aws-sdk). First, I am able to generate session token for Service Account which has access to execute the API.
var AWS = require('aws-sdk');
AWS.config.update({ "accessKeyId": "<>", "secretAccessKey": "<>", "region": "us-west" });
var sts = new AWS.STS();
var response = {};
sts.assumeRole({
RoleArn: 'arn:aws:iam::170000000000:role/service-account',
RoleSessionName: 'AssumtaseRole'
}, function(err, data) {
if (err) { // an error occurred
var error = {}
response.message = err.originalError.message,
response.errno = err.originalError.errno,
response.code = 404;
console.log(response);
} else { // successful response
response.code = 200,
response.accesskey = data.Credentials.AccessKeyId,
response.secretkey = data.Credentials.SecretAccessKey,
response.sessiontoken = data.Credentials.SessionToken,
console.log(response);
}
});
Now I am trying to execute the endpoint using the above session token. If test session token using postman, I am able to execute the API but not sure how to do it using (aws-sdk) or ('aws-api-gateway-client')
I tried to execute using simple HTPPS request but getting error: Here is the code:
var AWS = require('aws-sdk');
var apigClientFactory = require('aws-api-gateway-client').default;
AWS.config.update({ "accessKeyId": "<>", "secretAccessKey": "<>", "region": "us-west" });
var sts = new AWS.STS();
var response = {};
sts.assumeRole({
RoleArn: 'arn:aws:iam::170000000000:role/service_account',
RoleSessionName: 'AssumtaseRole'
}, function(err, data) {
if (err) { // an error occurred
var error = {}
response.message = err.originalError.message,
response.errno = err.originalError.errno,
response.code = 404;
console.log(response);
} else { // successful response
response.code = 200,
response.accesskey = data.Credentials.AccessKeyId,
response.secretkey = data.Credentials.SecretAccessKey,
response.sessiontoken = data.Credentials.SessionToken,
console.log(response);
var apigClient = apigClientFactory.newClient({
invokeUrl: "https://some-endpoint.com", // REQUIRED
accessKey: data.Credentials.AccessKeyId, // REQUIRED
secretKey: data.Credentials.SecretAccessKey, // REQUIRED
sessiontoken: data.Credentials.SessionToken,
region: "us-west", // REQUIRED: The region where the AapiKeyloyed.
retries: 4,
retryCondition: (err) => { // OPTIONAL: Callback to further control if request should be retried. Uses axon-retry plugin.
return err.response && err.response.status === 500;
}
});
var pathParams = "";
var pathTemplate = "/agent/registration"; // '/api/v1/sites'
var method = "post"; // 'POST';
var additionalParams = ""; //queryParams & Headers if any
var body = {
"agent_number": "1200",
"agent_name": "Test"
};
apigClient.invokeApi(pathParams, pathTemplate, method, additionalParams, body)
.then(function(result) {
console.log(result)
}).catch(function(error) {
console.log(error)
});
// console.log(output);
}
});
Here is the error:
data:
{ message: 'The security token included in the request is invalid.' } } }
Thanks in advance.
Thank You Kiran

Please change sessiontoken to sessionToken. that will fix your issue. I have tested the code on my machine.
When i tested with sessiontoken i also received the error The security token included in the request is invalid.. It worked when i changed it to the correct key which is sessionToken.
here is simplified code. When i tested, I have hard coded accessKey, secretKey and sessionToken.
var apigClientFactory = require('aws-api-gateway-client').default;
var apigClient = apigClientFactory.newClient({
invokeUrl:'https://api-url.com', // REQUIRED
accessKey: '', // REQUIRED
secretKey: '', // REQUIRED
sessionToken: '', //OPTIONAL: If you are using temporary credentials you must include the session token
region: 'ap-southeast-2', // REQUIRED: The region where the API is deployed.
systemClockOffset: 0, // OPTIONAL: An offset value in milliseconds to apply to signing time
retries: 4, // OPTIONAL: Number of times to retry before failing. Uses axon-retry plugin.
retryCondition: (err) => { // OPTIONAL: Callback to further control if request should be retried. Uses axon-retry plugin.
return err.response && err.response.status === 500;
}
});
(() => {
apigClient.invokeApi(null, `/hello`, 'GET')
.then(function(result){
console.log('result: ', result)
//This is where you would put a success callback
}).catch( function(result){
console.log('result: ', result)
//This is where you would put an error callback
});
})()

Add video to Youtube playlist NodeJS

I am currently working through the code to programmatically create a youtube playlist using a nodejs server that I received from a previous question I had and am using the working code below to do so:
var google = require('googleapis');
var Lien = require("lien");
var OAuth2 = google.auth.OAuth2;
var server = new Lien({
host: "localhost"
, port: 5000
});
var oauth2Client = new OAuth2(
'YOUR_CLIENT_ID',
'YOUR_CLIENT_SECRET',
'http://localhost:5000/oauthcallback'
);
var scopes = [
'https://www.googleapis.com/auth/youtube'
];
var youtube = google.youtube({
version: 'v3',
auth: oauth2Client
});
server.addPage("/", lien => {
var url = oauth2Client.generateAuthUrl({
access_type: "offline",
scope: scopes
});
lien.end("<a href='"+url+"'>Authenticate yourself</a>");
})
server.addPage("/oauthcallback", lien => {
console.log("Code obtained: " + lien.query.code);
oauth2Client.getToken(lien.query.code, (err, tokens) => {
if(err){
return console.log(err);
}
oauth2Client.setCredentials(tokens);
youtube.playlists.insert({
part: 'id,snippet',
resource: {
snippet: {
title:"Test",
description:"Description",
}
}
}, function (err, data, response) {
if (err) {
lien.end('Error: ' + err);
}
else if (data) {
lien.end(data);
}
if (response) {
console.log('Status code: ' + response.statusCode);
}
});
});
});
I am now moving on to the part of my project where I am in need of a way to add videos to this playlist once I have created it. The sample code that I am following along with is only written in JS and does not detail nodejs and I am therefore stuck on how to achieve this implementation with nodejs. How could I create a method like this (received from the JS implementation from the link above):
function addToPlaylist(id, startPos, endPos) {
var details = {
videoId: id,
kind: 'youtube#video'
}
if (startPos != undefined) {
details['startAt'] = startPos;
}
if (endPos != undefined) {
details['endAt'] = endPos;
}
var request = gapi.client.youtube.playlistItems.insert({
part: 'snippet',
resource: {
snippet: {
playlistId: playlistId,
resourceId: details
}
}
});
request.execute(function(response) {
$('#status').html('<pre>' + JSON.stringify(response.result) + '</pre>');
});
}
in the NodeJS language using the implementation I have already started?

I get what you mean now.If you want to add a video on your playlist then you can do that in Node using this.
youtube.playlistItems.insert({
part: 'id,snippet',
resource: {
snippet: {
playlistId:"YOUR_PLAYLIST_ID",
resourceId:{
videoId:"THE_VIDEO_ID_THAT_YOU_WANT_TO_ADD",
kind:"youtube#video"
}
}
}
}, function (err, data, response) {
if (err) {
lien.end('Error: ' + err);
}
else if (data) {
lien.end(data);
}
if (response) {
console.log('Status code: ' + response.statusCode);
}
});

If you want to render the result as HTML, First you need to use a view engine like (jade or pug) then create a template then lastly render it along with the response.
Base on your example you can do it this way:
First Create a template( Im using Pug) Save it as results.pug
html
head
title= title
body
h1= title
p=description
img(src=thumbnails.medium.url)
Then update your code below:
var google = require('googleapis');
var Lien = require("lien");
var OAuth2 = google.auth.OAuth2;
var pug = require('pug')
var server = new Lien({
host: "localhost"
, port: 5000,
views:{
path:__dirname,
name:'pug'
}
});
var oauth2Client = new OAuth2(
'YOUR_CLIENT_ID',
'YOUR_CLIENT_SECRET',
'http://localhost:5000/oauthcallback'
);
var scopes = [
'https://www.googleapis.com/auth/youtube'
];
var youtube = google.youtube({
version: 'v3',
auth: oauth2Client
});
server.addPage("/", lien => {
var url = oauth2Client.generateAuthUrl({
access_type: "offline",
scope: scopes
});
lien.end("<a href='"+url+"'>Authenticate yourself</a>");
})
server.addPage("/oauthcallback", lien => {
console.log("Code obtained: " + lien.query.code);
oauth2Client.getToken(lien.query.code, (err, tokens) => {
if(err){
return console.log(err);
}
oauth2Client.setCredentials(tokens);
youtube.playlists.insert({
part: 'id,snippet',
resource: {
snippet: {
title:"Test",
description:"Description",
}
}
}, function (err, data, response) {
if (err) {
lien.end('Error: ' + err);
}
else if (data) {
//lien.end(data);
lien.render('results',data.snippet)
}
if (response) {
console.log('Status code: ' + response.statusCode);
}
});
});
});
The things that I update on your code are:
var server = new Lien({
host: "localhost"
, port: 5000,
views:{
path:__dirname,
name:'pug'
}
});
And
//lien.end(data);
lien.render('results',data.snippet)

Trouble Getting JSON Data

I am pretty new to back end programming with JavaScript and have written some code to query a database and return the results as JSON. It seems to be working correctly in the browser, but my iOS code isn't getting any data from it. I have it running locally for now while testing. If you look in my Swift that gets the data from the URL, I'm getting the NO JSON from the print statement in the catch.
JavaScript
'use strict';
var util = require('util');
var sql = require("mssql");
var express = require('express');
var port = process.env.PORT || 1337;
var membershipNumber;
var queryString;
var app = express();
app.get('/membership/:number', function (req, res) {
console.log("\nPARAMS:");
console.log(req.params.number);
membershipNumber = req.params.number;
queryString = util.format('SELECT major_key, company, status, paid_thru FROM name WHERE major_key = \'%s\' and member_record = 1', membershipNumber);
console.log("\nQUERY:");
console.log(queryString);
res.setHeader('Content-Type', 'application/json');
res.set('Content-Type', 'application/json');
membershipStatusQuery(queryString, res);
});
app.get('/', function (req, res) {
var dictionary = [];
dictionary.push({
key: "none"
});
var jsonDict = JSON.stringify(dictionary);
res.setHeader('Content-Type', 'application/json');
res.set('Content-Type', 'application/json');
res.send(jsonDict);
});
function membershipStatusQuery(query, response) {
var config = {
server: 'DB_Server',
database: 'testDB',
user: 'sa',
password: 'password',
port: 1433
};
var connection = new sql.Connection(config);
connection.connect().then(function () {
var req = new sql.Request(connection);
req.query(query).then(function (recordset) {
connection.close();
response.send(results);
})
.catch(function (err) {
console.log(err);
connection.close();
response.send(err);
});
})
.catch(function (err) {
console.log(err);
response.send(err);
});
}
app.listen(port, function () {
console.log("Listening on port %s", port);
});
RESULTS
[{"major_key":"0001354648","company":"Membership of David Metzgar","status":"A","paid_thru":"2017-10-31T00:00:00.000Z"}]
iOS Swift Code
Class to get JSON from URL:
import UIKit
class GetJSON: NSObject {
func getJSONFrom(urlString: String) -> JSON {
let url = URL(string: urlString)
var data = Data()
do {
data = try Data(contentsOf: url!)
} catch {
print("No JSON")
// TODO: Display error
}
let json = JSON(data: data)
return json
}
}
Method from another class to use JSON:
func getQueryResultsJSON() {
print("http://localhost:1337/membership/\(memberNumberTextField.text!)")
// let jsonURL = "http://localhost:1337/membership/\(memberNumberTextField.text!)"
let jsonURL = "http://localhost:1337/membership/0001354648"
let getJSON = GetJSON()
self.resultsArray = getJSON.getJSONFrom(urlString: jsonURL)
if let dictionary = resultsArray?[0].dictionaryObject {
if let status = dictionary["status"] {
if status as! String == "A" {
print(dictionary)
print("Provided membership is active")
// membership is active
// TODO: save info and display membership card
} else {
print(dictionary)
print("Provided membership is NOT active")
// membership is not active
// TODO: display alert
}
} else {
print("DOESN'T EXIST!")
// membership number does not exist
// TODO: display alert
}
} else {
print("NOTHING!")
}
}

let url = NSURL(string: "your url")!
let request = NSMutableURLRequest(url: url as URL)
// request.httpMethod = "POST"
// request.httpBody = jsonData
//request.setValue("application/json; charset=utf-8", forHTTPHeaderField: "Content-Type")
let task = URLSession.shared.dataTask(with: request as URLRequest){ data,response,error in
if error != nil {
return
}
do {
let userObject = try JSONSerialization.jsonObject(with: data!, options: .allowFragments) as? [String: String]
if userObject != nil {
// do something
}
} catch let jsonError {
print(jsonError)
print(String(data: data!, encoding: String.Encoding.utf8)!)
}
}
task.resume()

How to make a GET and POST request to an external API?

var Attendance = require('../../../collections/attendance').Attendance;
var moment = require('moment');
module.exports = function(app) {
app.get('/api/trackmyclass/attendance', function(req, res) {
var data = req.body;
data['user'] = req.user;
Attendance.getByUser(data, function(err, d) {
if (err) {
console.log('This is the err' + err.message);
res.json(err, 400);
} else {
var job = d['attendance'];
if (typeof job != undefined) {
res.json(job);
console.log('This is it' + job['status']);
} else
res.json('No data Present', 200);
}
});
});
app.post('/api/trackmyclass/attendance', function(req, res) {
var data = req.body;
data['user'] = req.user;
Attendance.create(data, function(err, d) {
if (err) {
console.log('This is the err' + err.message);
res.json(err, 400);
} else {
var attendance = d['attendance'];
if (typeof job != undefined) {
console.log('Attendance record created' + attendance);
res.json(attendance);
} else
res.json('No data Present', 200);
}
});
});
}
This is the api code I to which I need to make the GET and POST request. But I have no idea how to do it.

It looks like your code is using express which would normally be good for building and API for your app. However to make a simple request to a third party api and staying in node.js why not try the request module which is great. https://www.npmjs.org/package/request
Your example does not show what the path of the request is or if you need any additinal headers etc but here is a simple example of a GET request using request.
var request = require('request');
function makeCall (callback) {
// here we make a call using request module
request.get(
{ uri: 'THEPATHAND ENDPOINT YOU REQUEST,
json: true,
headers: {
'Content-Type' : 'application/x-www-form-urlencoded',
}
},
function (error, res, object) {
if (error) { return callback(error); }
if (res.statusCode != 200 ) {
return callback('statusCode');
}
callback(null, object);
}
);
}
or jquery .ajax from a front end client direcct to your path
$.ajax({
url: "pathtoyourdata",
type: "GET",
})
.done(function (data) {
//stuff with your data
});

How upload a file to Dropbox with dropbox.js?

ORIGINAL
I'm having problems to upload a file (image) to Dropbox from Node.js using the official dropbox.js.
I want to upload a picture that I have in another server. For example with the dropbpox icon (www.dropbox.com/static/images/new_logo.png).
client.writeFile(file, 'www.dropbox.com/static/images/new_logo.png', function(error, stat) {
if (error) {
return es.send(error.status); // Something went wrong.
}
res.send("File saved as revision " + stat.revisionTag);
});
I know that this only creates a text file with the url, but how I can upload the picture to Dropbox?
I also try to download the file using http.get and then upload this to dropbox but it doesn't work.
Thanks.
UPDATE WITH MORE INFO
First I download the image from a remote url with this code:
var request = http.get(options, function(res){
var imagedata = ''
res.setEncoding('binary')
res.on('data', function(chunk){
imagedata += chunk
})
res.on('end', function(){
console.log("Image downloaded!");
fs.writeFile(local, imagedata, 'binary', function(err){
if (err) throw err
console.log('File saved.')
})
})
})
The file is saved correctly.
Then I trie to things:
Sending the 'imagedata' to Dropbox:
console.log("Image downloaded!");
client.writeFile(file, imagedata, function(error, stat) {
if (error) {
return response.send(error.status); // Something went wrong.
}
response.send("File saved as revision " + stat.revisionTag);
});
And something is uploaded to Dropbox but it's nothing useful.
Then I also tried to read the file from disc and then send it to Dropbox but it doesn't work neither:
fs.readFile(file, function(err, data) {

Use dropbox-js 0.9.1-beta1 or above to upload binary files from node.js. You need to pass it Buffer or ArrayBuffer instances. Try this code:
var req = http.get(options, function(res) {
var chunks = [];
res.on('data', function(chunk) {
chunks.push(chunk);
});
res.on('end', function() {
console.log("Image downloaded!");
var imageData = Buffer.concat(chunks);
client.writeFile(file, imageData, function(error, stat) {
if (error) {
return response.send(error.status);
}
response.send("File saved as revision " + stat.revisionTag);
});
});
});
```
Original answer: the dropbox-js README mentions that binary files don't work in node.js just yet.

I had issue as well, I just copied and modified a bit on the old dropbox-node npm(which is now deprecated), but I added following function on dropbox.js.
Client.prototype.writeFileNodejs = function(path, data, callback) {
var self = this;
fs.readFile(data.path, function(err, data) {
if (err) return callback(err);
var uri = "" + self.urls.putFile + "/" + (self.urlEncodePath(path));
if (typeof data === 'function') callback = data, data = undefined;
var oauth = {
consumer_key: self.oauth.key
, consumer_secret: self.oauth.secret
, token: self.oauth.token
, token_secret: self.oauth.tokenSecret
};
var requestOptions = { uri: uri, oauth: oauth };
requestOptions.body = data;
return request['put'](requestOptions, callback ?
function(err, res, body) {
if (err) return callback(err);
var contentType = res.headers['content-type'];
// check if the response body is in JSON format
if (contentType === 'application/json' ||
contentType === 'text/javascript') {
body = JSON.parse(body);
if (body.error) {
var err = new Error(body.error);
err.statusCode = res.statusCode;
return callback(err);
}
} else if (errors[res.statusCode]) {
var err = new Error(errors[res.statusCode]);
err.statusCode = res.statusCode;
return callback(err);
}
// check for metadata in headers
if (res.headers['x-dropbox-metadata']) {
var metadata = JSON.parse(res.headers['x-dropbox-metadata']);
}
callback(null, body, metadata);
} : undefined);
});
};
As well you would like to require request and fs to do this.
var request = require('request'),
fs = require('fs');