I am trying to post some json to a URL. I saw various other questions about this on stackoverflow but none of them seemed to be clear or work. This is how far I got, I modified the example on the api docs:
var http = require('http');
var google = http.createClient(80, 'server');
var request = google.request('POST', '/get_stuff',
{'host': 'sever', 'content-type': 'application/json'});
request.write(JSON.stringify(some_json),encoding='utf8'); //possibly need to escape as well?
request.end();
request.on('response', function (response) {
console.log('STATUS: ' + response.statusCode);
console.log('HEADERS: ' + JSON.stringify(response.headers));
response.setEncoding('utf8');
response.on('data', function (chunk) {
console.log('BODY: ' + chunk);
});
});
When I post this to the server I get an error telling me that it's not of the json format or that it's not utf8, which they should be. I tried to pull the request url but it is null. I am just starting with nodejs so please be nice.
The issue is that you are setting Content-Type in the wrong place. It is part of the request headers, which have their own key in the options object, the first parameter of the request() method. Here's an implementation using ClientRequest() for a one-time transaction (you can keep createClient() if you need to make multiple connections to the same server):
var http = require('http')
var body = JSON.stringify({
foo: "bar"
})
var request = new http.ClientRequest({
hostname: "SERVER_NAME",
port: 80,
path: "/get_stuff",
method: "POST",
headers: {
"Content-Type": "application/json",
"Content-Length": Buffer.byteLength(body)
}
})
request.end(body)
The rest of the code in the question is correct (request.on() and below).
Jammus got this right. If the Content-Length header is not set, then the body will contain some kind of length at the start and a 0 at the end.
So when I was sending from Node:
{"email":"joe#bloggs.com","passwd":"123456"}
my rails server was receiving:
"2b {"email":"joe#bloggs.com","passwd":"123456"} 0 "
Rails didn't understand the 2b, so it wouldn't interpret the results.
So, for passing params via JSON, set the Content-Type to application/json, and always give the Content-Length.
To send JSON as POST to an external API with NodeJS... (and "http" module)
var http = require('http');
var post_req = null,
post_data = '{"login":"toto","password":"okay","duration":"9999"}';
var post_options = {
hostname: '192.168.1.1',
port : '8080',
path : '/web/authenticate',
method : 'POST',
headers : {
'Content-Type': 'application/json',
'Cache-Control': 'no-cache',
'Content-Length': post_data.length
}
};
post_req = http.request(post_options, function (res) {
console.log('STATUS: ' + res.statusCode);
console.log('HEADERS: ' + JSON.stringify(res.headers));
res.setEncoding('utf8');
res.on('data', function (chunk) {
console.log('Response: ', chunk);
});
});
post_req.on('error', function(e) {
console.log('problem with request: ' + e.message);
});
post_req.write(post_data);
post_req.end();
There is a very good library that support sending POST request in Nodejs:
Link: https://github.com/mikeal/request
Sample code:
var request = require('request');
//test data
var USER_DATA = {
"email": "email#mail.com",
"password": "a075d17f3d453073853f813838c15b8023b8c487038436354fe599c3942e1f95"
}
var options = {
method: 'POST',
url: 'URL:PORT/PATH',
headers: {
'Content-Type': 'application/json'
},
json: USER_DATA
};
function callback(error, response, body) {
if (!error) {
var info = JSON.parse(JSON.stringify(body));
console.log(info);
}
else {
console.log('Error happened: '+ error);
}
}
//send request
request(options, callback);
Try including the content length.
var body = JSON.stringify(some_json);
var request = google.request('POST', '/get_stuff', {
host: 'server',
'Content-Length': Buffer.byteLength(body),
'Content-Type': 'application/json'
});
request.write(body);
request.end();
This might not solve your problem, but javascript doesn't support named arguments, so where you say:
request.write(JSON.stringify(some_json),encoding='utf8');
You should be saying:
request.write(JSON.stringify(some_json),'utf8');
The encoding= is assigning to a global variable, so it's valid syntax but probably not doing what you intend.
Probably non-existent at the time this question was asked, you could use nowadays a higher level library for handling http requests, such as https://github.com/mikeal/request. Node's built-in http module is too low level for beginners to start with.
Mikeal's request module has built-in support for directly handling JSON (see the documentation, especially https://github.com/mikeal/request#requestoptions-callback).
var request = google.request(
'POST',
'/get_stuff',
{
'host': 'sever',
**'headers'**:
{
'content-type': 'application/json'
}
}
);
Related
console error :
code to reproduce error:
var request = require('request');
var url = 'http://api.stackexchange.com/2.2/https://stackoverflow.com/questions';
request({
headers: {
'Accept': 'application/json; charset=utf-8',
'User-Agent': 'RandomHeader'
},
uri: url,
key: 'cawQTENGI5TpoSgBKy7SXw',
method: 'GET',
gzip: true
},
function(err, res, body) {
console.log("response.statusCode" + res.statusCode);
console.log('server encoded the data as: ' + (res.headers['content-encoding'] || 'identity'))
console.log('the decoded data is: ' + body)
});
export default {
name: 'StackApi',
}
My intention is to get all questions, but the documentation of Stack Overflow is hard to understand for me, is it because I am accessing locally the data? I don't understand the Cross-Origin read blocking.
You're using a wrong url
var url = 'http://api.stackexchange.com/2.2/https://stackoverflow.com/questions';
it should be :
var url 'http://api.stackexchange.com//2.2/questions?order=desc&sort=activity&site=stackoverflow'
just provide the site name in your query
I am attempting to send a rest request over https using the following
// Construct the POST auth body and options
let postData = JSON.stringify({
username: this.state.username,
password: this.state.password
});
console.log(postData);
var options = {
host: this.state.peerAddress,
port: this.state.port,
path: "/api/" + this.state.channelName + "/user-authorisation",
method: "POST",
headers: {
"Content-Type": "application/json",
"Content-Length": postData.length
}
};
console.log(options);
var postRequest = https.request(options, function(res) {
console.log("\nstatus code: ", res.statusCode);
res.setEncoding("utf8");
res.on("data", function(data) {
console.log(JSON.parse(data));
});
});
e.preventDefault();
// post the data
postRequest.write(postData);
postRequest.end();
The request is sent to the server but there is no body present. I have tested this by sending the same request over postman and it works fine. I am sending the request on Chrome if that makes any difference? I get the following errors on the console but these happen after the request has been sent I believe so that are not really an issue at this point.
request.js:149 OPTIONS https://<<address>>:<<port>><<path>> net::ERR_CONNECTION_REFUSED
localhost/:1 Uncaught (in promise) TypeError: Failed to fetch
Any help would be greatly appreciated!
Cheers
Hello and happy new year!
I'm trying to send a post petition in Node.js. The version I need to replicate in javascript looks like this:
$.post('website.com/api/buy.php', {
action: order,
'items[]': cart_i,
time: localtime,
utb: x //I don't know why that parameter is sent. It's always 0 ._.
} ... //rest of the code of that website
I'm trying to do this in Node.js to replicate that:
var postData = querystring.stringify({
action: 'order',
"items[]": item.i,
time: local_time,
utb: 0
});
var https = require('https');
var options = { method: 'POST', host: 'website.com', port: 443, path: '/api/buy.php', headers: { 'Cache-Control': 'no-cache', 'Cookie': cookies, 'Accept': '/', 'Connection': 'keep-alive' } };
var req = https.request(options, function (res) {
res.setEncoding('utf8');
res.on('data', function (chunk) {
content = content+ chunk;
});
res.on('end', function () {
console.log(content)
});
}
);
req.write(postData);
req.end();
But I always get an error telling me that I didnt send anything. I think the problem could be in items[] because I see it sends "items%5B%5D", but I dont know if I'm doing something wrong. I think is is not about cookies, because if I'm not logged I get other error.
I'm doing the request well? Or I'm missing something that is not about the request? Is there other way to send "post" data easier?
Any help would be appreciated :)
I've known the way to send a simple HTTP request using Node.js as the following:
var http = require('http');
var options = {
host: 'example.com',
port: 80,
path: '/foo.html'
};
http.get(options, function(resp){
resp.on('data', function(chunk){
//do something with chunk
});
}).on("error", function(e){
console.log("Got error: " + e.message);
});
I want to know how to embed parameters in the body of POST request and how to capture them from the receiver module.
Would you mind using the request library. Sending a post request becomes as simple as
var options = {
url: 'https://someurl.com',
'method': 'POST',
'body': {"key":"val"}
};
request(options,function(error,response,body){
//do what you want with this callback functon
});
The request library also has a shortcut for post in request.post method in which you pass the url to make a post request to along with the data to send to that url.
Edit based on comment
To "capture" a post request it would be best if you used some kind of framework. Since express is the most popular one I will give an example of express. In case you are not familiar with express I suggest reading a getting started guide by the author himself.
All you need to do is create a post route and the callback function will contain the data that is posted to that url
app.post('/name-of-route',function(req,res){
console.log(req.body);
//req.body contains the post data that you posted to the url
});
If you want to use the native http module, parameters can be included in body this way:
var http = require('follow-redirects').http;
var fs = require('fs');
var options = {
'method': 'POST',
'hostname': 'example.com',
'path': '/foo.html',
'headers': {
},
'maxRedirects': 20
};
var req = http.request(options, function (res) {
var chunks = [];
res.on("data", function (chunk) {
chunks.push(chunk);
});
res.on("end", function (chunk) {
var body = Buffer.concat(chunks);
console.log(body.toString());
});
res.on("error", function (error) {
console.error(error);
});
});
var postData = "------WebKitFormBoundary7MA4YWxkTrZu0gW\r\nContent-Disposition: form-data; name=\"examplekey\"\r\n\r\nexamplevalue\r\n------WebKitFormBoundary7MA4YWxkTrZu0gW--";
req.setHeader('content-type', 'multipart/form-data; boundary=----WebKitFormBoundary7MA4YWxkTrZu0gW');
req.write(postData);
req.end();
I'm brand new to node.js, but I wanted to play around with some basic code and make a few requests. At the moment, I'm playing around with the OCW search (http://www.ocwsearch.com/), and I'm trying to make a few basic requests using their sample search request:
However, no matter what request I try to make (even if I just query google.com), it's returning me
<html>
<head><title>301 Moved Permanently</title></head>
<body bgcolor="white">
<center><h1>301 Moved Permanently</h1></center>
<hr><center>nginx/0.7.65</center>
</body>
</html>
I'm not too sure what's going on. I've looked up nginx, but most questions asked about it seemed to be asked by people who were setting up their own servers. I've tried using an https request instead, but that returns an error 'ENOTFOUND'.
My code below:
var http = require('http');
http.createServer(function (request, response) {
response.writeHead(200, {'Content-Type': 'text/plain'});
response.end('Hello World\n');
var options = {
host:'ocwsearch.com',
path:
'/api/v1/search.json?q=statistics&contact=http%3a%2f%2fwww.ocwsearch.com%2fabout/',
method: 'GET'
}
var req = http.request(options, function(res) {
console.log("statusCode: ", res.statusCode);
console.log("headers: ", res.headers);
res.on('data', function(d) {
process.stdout.write(d);
});
});
req.end();
req.on('error', function(e) {
console.error(e);
});
}).listen(8124);
console.log('Server running at http://127.0.0.1:8124/');
Sorry if this is a really simple question, and thanks for any help you can give!
For me the website I was trying to GET was redirecting me to the secure protocol. So I changed
require('http');
to
require('https');
The problem is that Node.JS's HTTP Request module isn't following the redirect you are given.
See this question for more: How do you follow an HTTP Redirect in Node.js?
Basically, you can either look through the headers and handle the redirect yourself, or use one of the handful of modules for this. I've used the "request" library, and have had good luck with it myself. https://github.com/mikeal/request
var http = require('http');
var find_link = function(link, callback){
var root ='';
var f = function(link){
http.get(link, function(res) {
if (res.statusCode == 301) {
f(res.headers.location);
} else {
callback(link);
}
});
}
f(link, function(t){i(t,'*')});
}
find_link('http://somelink.com/mJLsASAK',function(link){
console.log(link);
});
function i(data){
console.log( require('util').inspect(data,{depth:null,colors:true}) )
}
This question is old now, but I got the same 301 error and these answers didn't actually help me to solve the problem.
I wrote the same code:
var options = {
hostname: 'google.com',
port: 80,
path: '/',
method: 'GET',
headers: {
'Content-Type': 'text/plain',
}
};
var http = require('http');
var req = http.request(options, function(res) {
console.log('STATUS:',res.statusCode);
console.log('HEADERS: ', JSON.stringify(res.headers));
res.setEncoding('utf8');
res.on('data', function(chunk) {
console.log(chunk);
});
res.on('end', function() {
console.log('No more data in response.');
});
});
req.on('error', function(e) {
console.log('problem with request: ', e.message);
});
console.log(req);
req.end();
so after some time I realized that there's a really tiny mistake in this code which is hostname part:
var options = {
hostname: 'google.com',
...
you have to add "www." before your URL to get html content, otherwise there would be 301 error.
var options = {
hostname: 'www.google.com',