serialport-linux.zip

# Request - Simplified HTTP client [](https://nodei.co/npm/request/) [](https://travis-ci.org/request/request) [](https://codecov.io/github/request/request?branch=master) [](https://coveralls.io/r/request/request) [](https://david-dm.org/request/request) [](https://snyk.io/test/npm/request) [](https://gitter.im/request/request?utm_source=badge) ## Super simple to use Request is designed to be the simplest way possible to make http calls. It supports HTTPS and follows redirects by default. ```js var request = require('request'); request('http://www.google.com', function (error, response, body) { if (!error && response.statusCode == 200) { console.log(body) // Show the HTML for the Google homepage. } }) ``` ## Table of contents - [Streaming](#streaming) - [Forms](#forms) - [HTTP Authentication](#http-authentication) - [Custom HTTP Headers](#custom-http-headers) - [OAuth Signing](#oauth-signing) - [Proxies](#proxies) - [Unix Domain Sockets](#unix-domain-sockets) - [TLS/SSL Protocol](#tlsssl-protocol) - [Support for HAR 1.2](#support-for-har-12) - [**All Available Options**](#requestoptions-callback) Request also offers [convenience methods](#convenience-methods) like `request.defaults` and `request.post`, and there are lots of [usage examples](#examples) and several [debugging techniques](#debugging). --- ## Streaming You can stream any response to a file stream. ```js request('http://google.com/doodle.png').pipe(fs.createWriteStream('doodle.png')) ``` You can also stream a file to a PUT or POST request. This method will also check the file extension against a mapping of file extensions to content-types (in this case `application/json`) and use the proper `content-type` in the PUT request (if the headers don’t already provide one). ```js fs.createReadStream('file.json').pipe(request.put('http://mysite.com/obj.json')) ``` Request can also `pipe` to itself. When doing so, `content-type` and `content-length` are preserved in the PUT headers. ```js request.get('http://google.com/img.png').pipe(request.put('http://mysite.com/img.png')) ``` Request emits a "response" event when a response is received. The `response` argument will be an instance of [http.IncomingMessage](https://nodejs.org/api/http.html#http_class_http_incomingmessage). ```js request .get('http://google.com/img.png') .on('response', function(response) { console.log(response.statusCode) // 200 console.log(response.headers['content-type']) // 'image/png' }) .pipe(request.put('http://mysite.com/img.png')) ``` To easily handle errors when streaming requests, listen to the `error` event before piping: ```js request .get('http://mysite.com/doodle.png') .on('error', function(err) { console.log(err) }) .pipe(fs.createWriteStream('doodle.png')) ``` Now let’s get fancy. ```js http.createServer(function (req, resp) { if (req.url === '/doodle.png') { if (req.method === 'PUT') { req.pipe(request.put('http://mysite.com/doodle.png')) } else if (req.method === 'GET' || req.method === 'HEAD') { request.get('http://mysite.com/doodle.png').pipe(resp) } } }) ``` You can also `pipe()` from `http.ServerRequest` instances, as well as to `http.ServerResponse` instances. The HTTP method, headers, and entity-body data will be sent. Which means that, if you don't really care about security, you can do: ```js http.createServer(function (req, resp) { if (req.url === '/doodle.png') { var x = request('http://mysite.com/doodle.png') req.pipe(x) x.pipe(resp) } }) ``` And since `pipe()` returns the destination stream in ≥ Node 0.5.x you can do one line proxying. :) ```js req.pipe(request('http://mysite.com/doodle.png')).pipe(resp) ``` Also, none of this new functionality conflicts with requests previous features, it just expands them. ```js var r = request.defaults({'proxy':'http://localproxy.com'}) http.createServer(function (req, resp) { if (req.url === '/doodle.png') { r.get('http://google.com/doodle.png').pipe(resp) } }) ``` You can still use intermediate proxies, the requests will still follow HTTP forwards, etc. [back to top](#table-of-contents) --- ## Forms `request` supports `application/x-www-form-urlencoded` and `multipart/form-data` form uploads. For `multipart/related` refer to the `multipart` API. #### application/x-www-form-urlencoded (URL-Encoded Forms) URL-encoded forms are simple. ```js request.post('http://service.com/upload', {form:{key:'value'}}) // or request.post('http://service.com/upload').form({key:'value'}) // or request.post({url:'http://service.com/upload', form: {key:'value'}}, function(err,httpResponse,body){ /* ... */ }) ``` #### multipart/form-data (Multipart Form Uploads) For `multipart/form-data` we use the [form-data](https://github.com/form-data/form-data) library by [@felixge](https://github.com/felixge). For the most cases, you can pass your upload form data via the `formData` option. ```js var formData = { // Pass a simple key-value pair my_field: 'my_value', // Pass data via Buffers my_buffer: new Buffer([1, 2, 3]), // Pass data via Streams my_file: fs.createReadStream(__dirname + '/unicycle.jpg'), // Pass multiple values /w an Array attachments: [ fs.createReadStream(__dirname + '/attachment1.jpg'), fs.createReadStream(__dirname + '/attachment2.jpg') ], // Pass optional meta-data with an 'options' object with style: {value: DATA, options: OPTIONS} // Use case: for some types of streams, you'll need to provide "file"-related information manually. // See the `form-data` README for more information about options: https://github.com/form-data/form-data custom_file: { value: fs.createReadStream('/dev/urandom'), options: { filename: 'topsecret.jpg', contentType: 'image/jpg' } } }; request.post({url:'http://service.com/upload', formData: formData}, function optionalCallback(err, httpResponse, body) { if (err) { return console.error('upload failed:', err); } console.log('Upload successful! Server responded with:', body); }); ``` For advanced cases, you can access the form-data object itself via `r.form()`. This can be modified until the request is fired on the next cycle of the event-loop. (Note that this calling `form()` will clear the currently set form data for that request.) ```js // NOTE: Advanced use-case, for normal use see 'formData' usage above var r = request.post('http://service.com/upload', function optionalCallback(err, httpResponse, body) {...}) var form = r.form(); form.append('my_field', 'my_value'); form.append('my_buffer', new Buffer([1, 2, 3])); form.append('custom_file', fs.createReadStream(__dirname + '/unicycle.jpg'), {filename: 'unicycle.jpg'}); ``` See the [form-data README](https://github.com/form-data/form-data) for more information & examples. #### multipart/related Some variations in different HTTP implementations require a newline/CRLF before, after, or both before and after the boundary of a `multipart/related` request (using the multipart option). This has been observed in the .NET WebAPI version 4.0. You can turn on a boundary preambleCRLF or postamble by passing them as `true` to your request options. ```js request({ method: 'PUT', preambleCRLF: true, postambleCRLF: true, uri: 'http://service.com/upload', multipart: [