Using NodeJS to Send JSON Data via HTTP POST Request

Question

Using NodeJS to Send JSON Data via HTTP POST Request

Issue with Sending JSON Data via Http Post in NodeJS


const http = require('http');
const fs = require('fs');

var options = {
  hostname: 'www.postcatcher.in',
  port: 80,
  path: '/catchers/5531b7faacde130300002495',
  method: 'POST',
  headers: {
    'Content-Type': 'application/json',
  }
};
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 (body) {
    console.log('Body: ' + body);
    fs.writeFile("/var/www/node/test.txt", body, function(err) {
      if(err) {
        return console.log(err);
      }
      console.log("The file was saved!");
    }); 
  });
});
req.on('error', function(e) {
  console.log('problem with request: ' + e.message);
});
// write data to request body
req.write('{"string": result}'); // RESULT HERE IS A JSON
req.end();

Additionally tried:

// request.post(
        //     '',
        //     { form: { key: result } },
        //     function (error, response, body) {
        //         if (!error && response.statusCode == 200) {
        //             console.log(body);
        //         }
        //     }
        // );
        // console.log(result);

javascript jquery ajax json node.js

Answer 1

Answer №1

result is not being dynamically inserted.

It appears that everything is functioning correctly.

http = require('http');
fs = require('fs');

var options = {
    hostname: 'www.postcatcher.in',
      port: 80,
      path: '/catchers/5531b7faacde130300002495',
      method: 'POST',
      headers: {
              'Content-Type': 'application/json',
          }
        };
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 (body) {
    console.log('Body: ' + body);
    fs.writeFile("test.txt", body, function(err) {
    if(err) {
        return console.log(err);
    }
              console.log("The file was saved!");
    }); 
  });
});
req.on('error', function(e) {
  console.log('issue with request: ' + e.message);
});

result = '{ "hello": "json" }';
req.write('{"string": '+result+'}');

req.end();

output:

$ node 29712051.js 
Status: 201
Headers: {"server":"Cowboy","date":"Sat, 18 Apr 2015 04:23:52 GMT","connection":"keep-alive","x-powered-by":"Express","content-type":"text/plain","content-length":"7","set-cookie":["connect.sid=0eGSTYI2RWf5ZTkpDZ0IumOD.OrcIJ53vFcOiQSdEbWz0ETQ9n50JBnXyZRjrSyFIdwE; path=/; expires=Sat, 18 Apr 2015 08:23:53 GMT; httpOnly"],"x-response-time":"6ms","via":"1.1 vegur"}
Body: Created
The file was saved!
$ cat test.txt
Created

Answer 2

result is not being dynamically inserted.

It appears that everything is functioning correctly.

http = require('http');
fs = require('fs');

var options = {
    hostname: 'www.postcatcher.in',
      port: 80,
      path: '/catchers/5531b7faacde130300002495',
      method: 'POST',
      headers: {
              'Content-Type': 'application/json',
          }
        };
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 (body) {
    console.log('Body: ' + body);
    fs.writeFile("test.txt", body, function(err) {
    if(err) {
        return console.log(err);
    }
              console.log("The file was saved!");
    }); 
  });
});
req.on('error', function(e) {
  console.log('issue with request: ' + e.message);
});

result = '{ "hello": "json" }';
req.write('{"string": '+result+'}');

req.end();

output:

$ node 29712051.js 
Status: 201
Headers: {"server":"Cowboy","date":"Sat, 18 Apr 2015 04:23:52 GMT","connection":"keep-alive","x-powered-by":"Express","content-type":"text/plain","content-length":"7","set-cookie":["connect.sid=0eGSTYI2RWf5ZTkpDZ0IumOD.OrcIJ53vFcOiQSdEbWz0ETQ9n50JBnXyZRjrSyFIdwE; path=/; expires=Sat, 18 Apr 2015 08:23:53 GMT; httpOnly"],"x-response-time":"6ms","via":"1.1 vegur"}
Body: Created
The file was saved!
$ cat test.txt
Created

Answer 3

Answer №2

Instead of manually creating a JSON string, you can use JSON.stringify(result) like this:

http = require('http');
fs = require('fs');

var options = {
    hostname: 'www.postcatcher.in',
    port: 80,
    path: '/catchers/5531b7faacde130300002495',
    method: 'POST',
    headers: {
        'Content-Type': 'application/json',
    }
};
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 (body) {
        console.log('Body: ' + body);
        fs.writeFile("test.txt", body, function(err) {
            if(err) {
                return console.log(err);
           }
            console.log("The file was saved!");
        });
    });
});
req.on('error', function(e) {
    console.log('problem with request: ' + e.message);
});

result = JSON.stringify({ hello: "json" });
req.write('{"string": '+result+'}');

req.end();

Answer 4

Instead of manually creating a JSON string, you can use JSON.stringify(result) like this:

http = require('http');
fs = require('fs');

var options = {
    hostname: 'www.postcatcher.in',
    port: 80,
    path: '/catchers/5531b7faacde130300002495',
    method: 'POST',
    headers: {
        'Content-Type': 'application/json',
    }
};
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 (body) {
        console.log('Body: ' + body);
        fs.writeFile("test.txt", body, function(err) {
            if(err) {
                return console.log(err);
           }
            console.log("The file was saved!");
        });
    });
});
req.on('error', function(e) {
    console.log('problem with request: ' + e.message);
});

result = JSON.stringify({ hello: "json" });
req.write('{"string": '+result+'}');

req.end();

Using NodeJS to Send JSON Data via HTTP POST Request

Answer №1

Answer №2

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