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  • Node.js modules you should know about: request

    Hey everyone! This is the fourth post in my new node.js modules you should know about article series.

    The first post was about dnode - the freestyle rpc library for node, the second was about optimist - the lightweight options parser for node, the third was about lazy - lazy lists for node.

    This time I'll introduce you to a very awesome module called request by Mikeal Rogers. Request is the swiss army knife of HTTP streaming.

    Check this out:

    var fs = require('fs')
    var request = require('request');
    
    request('http://google.com/doodle.png').pipe(fs.createWriteStream('doodle.png'))

    Pow! You just streamed the response of HTTP request to http://google.com/doodle.png into doodle.png local file!

    Here is more awesome stuff:

    var fs = require('fs')
    var request = require('request');
    
    fs.readStream('file.json').pipe(request.put('http://mysite.com/obj.json'))

    Pow! It streamed your local file file.json to http://mysite.com/obj.json as HTTP PUT request!

    var request = require('request');
    
    request.get('http://google.com/img.png').pipe(request.put('http://mysite.com/img.png'))

    Pow! This just streamed a HTTP GET from http://google.com/img.png to HTTP PUT to http://mysite.com/img.png.

    At Browserling we use this module for streaming data to and from couchdb. Here is an example that saves a JSON document at mikeal's test couchdb:

    var request = require('request')
    var rand = Math.floor(Math.random()*100000000).toString()
    
    request({
      method: 'PUT',
      uri: 'http://mikeal.iriscouch.com/testjs/' + rand,
      multipart: [
        {
          'content-type': 'application/json',
          'body': JSON.stringify({
            foo: 'bar',
            _attachments: {
              'message.txt': {
                follows: true,
                length: 18,
                'content_type': 'text/plain'
               }
             }
           })
        },
        { body: 'I am an attachment' }
      ] 
    }, function (error, response, body) {
      if(response.statusCode == 201){
        console.log('document saved as: http://mikeal.iriscouch.com/testjs/'+ rand);
      } else {
        console.log('error: '+ response.statusCode);
        console.log(body);
      }
    })

    Install it via npm, as always:

    npm install request
    

    Sponsor this blog series!

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    See ya!

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    source : http://www.catonmat.net/blog/nodejs-modules-request/

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  • 原文地址:https://www.cnblogs.com/feichan/p/Nodejs.html
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