I am trying to do an HTTP GET request to an external API with NodeJS (using Express), but I am not getting any data back. My code is the nextone:
import * as http from "http";
const options = {
host: "EXAMPLE.COM",
path: "/MY/PATH",
headers: {
"Content-Type": "application/json",
"Authorization": "Basic XXXXXXXXXXXXXXXXXX"
}
};
const req = http.get(options, function(res) {
console.log("statusCode: " + res.statusCode);
res.on("data", function (chunk) {
console.log("BODY: " + chunk);
});
});
But the response I get is:
statusCode : 302 and BODY is empty.
The external API works properly (I have tried doing a http GET Request with INSOMNIA and returns data)
The request I am doing NEEDS an Authorization Token
What am I doing wrong? or what can I do to get the data back?
Cheers
You are just throwing data to console.log and not responding to request.
You did not mention if what http server you are using with node. In case you are using express.js (most common one) you should have something like:
const express = require("express");
const app = express();
const port = 3003;
const http = require("http");
// your webserver url localhost:3003/fetch-something
app.get("/fetch-something", (req, res) => {
const options = {
host: "EXAMPLE.COM",
path: "/MY/PATH",
headers: {
"Content-Type": "application/json",
Authorization: "Basic XXXXXXXXXXXXXXXXXX"
}
};
const httpReq = http.get(options, function(httpRes) {
//output status code to your console
console.log("statusCode: " + httpRes.statusCode);
httpRes.on("data", function(chunk) {
// still nothing happens on client - this will also just print to server console
console.log("data", chunk);
// return some data for requested route
return res.send(chunk);
});
});
});
app.listen(port, () => console.log(`Example app listening on port ${port}!`));
Related
Please help me with the below POST request that I'm trying to make. Below is the code snippet.
const express = require("express");
const bodyParser = require("body-parser");
//const request = require("request");
const https = require("https");
const request = require('request-promise');
const app = express();
app.use(bodyParser.urlencoded({
extended: true
}));
app.use(express.static("public"));
app.get("/", function(req, res){
res.sendFile(__dirname + "/test.html");
});
const data = {
"some_header":{
"name":"xxxxx"
}
};
const jsonData = JSON.stringify(data);
console.log(jsonData);
app.post("/post", function(req, res){
const url = "xxxxxxxxxxxx";
const options = {
method: "POST",
body: data,
json: true,
headers: {
ContentType: "application/json",
Authorization: "nhgjgjhgjghjghj"
}
}
const request = https.request(url, options, function(response) {
if (response.statusCode === 200) {
// res.send("success");
console.log("success");
} else {
//res.send("Failed");
console.log("failure");
}
response.on("data", function(data) {
console.log(JSON.parse(data));
})
})
request.write(jsonData);
request.end();
});
app.listen(process.env.PORT || 3000, function() {
console.log("The app is up and running on Port 3000");
});
I'm getting 200OK response from the external server, but unable to post the data. When I logged the response data from the server, I received this success
{ require_login: true }
"Success" is the console log message. require_login: true is the response I'm getting from the server. where am I going wrong?
Try to add Basic before you api key. Also, if you are using base64, then check that original string is right one and should be something like: login:password
headers: {
ContentType: "application/json",
Authorization: "Basic BAsE64Format or api:key or login:password"
}
headers: { "Content-type": "application/json", Authorization: 'Basic ' + Buffer.from('CtB2HZwaRdGggr1g4K').toString('base64') }
enclosing the content-type with quotes and converting the API key to base 64 did the trick
In order to avoid cross origin issues, I've got a front end javascript that's querying a backend node.js server, which grabs data from an api on a different origin:
const API_URL = [SOME_OTHER_SERVER];
const API_TIMEOUT = 1000;
const API_TOKEN = [SOME_TOKEN]
const app = express();
const PORT = 3001;
app.use(cors());
app.get('/getBackendData', async(req, res)=> {
try {
const response = await axios.get(API_URL,{
timeout: API_TIMEOUT,
headers: {
'Authorization': `Token ${API_TOKEN}`,
'Access-Control-Allow-Origin': '*'
}
});
console.log(response.data.data); //this works to retrieve and log the data
return response.data.data; //I want this to return the data to the front end
} catch (error) {
console.error(error);
return error;
}
});
app.listen(PORT, function() {
console.log('backend listening on port %s.', PORT);
});
On the front end, I'm querying my node.js backend:
const BACKEND_API_URL = 'http://localhost:3001/getBackendData';
async function getData()
{
let response = await fetch(BACKEND_API_URL, {
headers: {
'Access-Control-Allow-Origin': '*',
'Content-Type': 'application/json',
}
});
let data = await response;
return data;
}
getData()
.then(data => console.log(data)); //does not log the data from the backend
What am I doing wrong that I can't get a response from my node.js backend on the frontend?
You don't can use return in express route.
use instead res object like this: res.send(response.data.data)
see: https://expressjs.com/pt-br/api.html#res
HTTP post request is not sending body or param data to the server
Forgive me if this turns out to be a duplicate question. I've looked at several similar questions on stack overflow, but none of them have solved my problem. Also tried using a GET request instead of a POST request, but body data is still not sending.
Client side code:
// ionic code
homeUrl: string = 'http://localhost:80';
let obj = {"name": "Guest"};
let response = this.httpClient.post(this.homeUrl + '/admin-signup', JSON.stringify(obj));
response.subscribe(data => {
console.log('response: ', data);
//TODO: handle HTTP errors
});
Server side code:
server.post('/admin-signup', (req, res) => {
console.log('sign')
console.log(req.body);
// TODO: Process request
res
.status(200)
.send(JSON.parse('{"message": "Hello, signup!"}'))
.end();
});
First of all, import http client
import { HttpClient, HttpHeaders } from '#angular/common/http';
Then do the following
const header = new HttpHeaders({
'Content-Type': 'application/json',
Accept: 'application/json'
//api token (if need)
});
const options = {
headers: header
}
let response = this.httpClient.post(this.homeUrl + '/admin-signup', obj, options);
response.toPromise().then(data => {
console.log('response: ', data);
//TODO: handle HTTP errors
}).catch((err) =>{
console.log('error', err);
});
Hope it solve your problem.
I'm not familiar with ionic
but I'm guessing its a cors issue
can you try use cors?
const cors = require('cors');
app.use(cors());
I am using an external api that doesn't allow client side POST request. I can make a POST request using node.js and I am getting my desired response on the server. I am stuck trying to figure out how to get the response from the server into my HTML file.
const https = require("https");
const data = JSON.stringify({
key: "value"
});
const options = {
hostname: "url",
port: 443,
path: "/path",
method: "POST",
headers: {
"Content-Type": "application/json",
"Content-Length": data.length
}
};
const req = https.request(options, res => {
console.log(
`statusCode: ${res.statusCode} statusMessage: ${res.statusMessage}`
);
res.setEncoding("utf8");
res.on("data", chunk => {
console.log(chunk);
});
});
req.on("error", error => {
console.error(error);
});
req.write(data)
req.end();
This is my server.js file, I'm not sure what the next step is to get in a file.
Do you know any guides or tutorials about implementing CoAP protocol connection on node.js? I have to implement simple server and client application. I've checked all the resources I've found, including of course their documentation:
https://github.com/mcollina/node-coap
but it is still unclear for me.
Thank you for any help.
EDIT:
If this is implementation of server, how should look client like?
var coap = require('coap')
, server = coap.createServer()
server.on('request', function(req, res) {
res.end('Hello ' + req.url.split('/')[1] + '\n')
})
// the default CoAP port is 5683
server.listen(function() {
var req = coap.request('coap://localhost/Matteo')
req.on('response', function(res) {
res.pipe(process.stdout)
res.on('end', function() {
process.exit(0)
})
})
req.end()
})
or like this , an example for coap client
const coap = require('coap'),
bl = require('bl');
//construct coap request
var req = coap.request({
observe: false,
host: '192.168.0.93',
pathname: '/',
port: 5683,
method: 'get',
confirmable: 'true',
retrySend: 'true',
//query:'',
options: {
// "Content-Format": 'application/json'
}
})
//put payload into request
var payload = {
username: 'aniu',
}
req.write(JSON.stringify(payload));
//waiting for coap server send con response
req.on('response', function(res) {
//print response code, headers,options,method
console.log('response code', res.code);
if (res.code !== '2.05') return process.exit(1);
//get response/payload from coap server, server sends json format
res.pipe(bl(function(err, data) {
//parse data into string
var json = JSON.parse(data);
console.log("string:", json);
// JSON.stringify(json));
}))
});
req.end();
It should be like this:
const coap = require('coap')
req = coap.request('coap://localhost')
console.log("Client Request...")
req.on('response' , function(res){
res.pipe(process.stdout)
})
req.end()
Source: https://github.com/mcollina/node-coap/blob/master/examples/client.js