http-headers
v3.0.2
Published
Parse http headers
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http-headers
Parse the start-line and headers from an HTTP request or reponse.
Converts:
HTTP/1.1 200 OK
Date: Tue, 10 Jun 2014 07:19:27 GMT
Connection: keep-alive
Transfer-Encoding: chunked
Hello World
To this:
{
version: { major: 1, minor: 1 },
statusCode: 200,
statusMessage: 'OK',
headers: {
date: 'Tue, 10 Jun 2014 07:19:27 GMT',
connection: 'keep-alive',
'transfer-encoding': 'chunked'
}
}
Features:
- Auto-detects and ignores body if present
- Fully RFC 2068 compliant (please open an issue if you find a discrepancy)
- Support multi-line headers (lines will be joined with a space)
- Support repeating headers
Installation
npm install http-headers --save
Usage
var net = require('net')
var httpHeaders = require('http-headers')
// create TCP server
net.createServer(function (c) {
var buffers = []
c.on('data', buffers.push.bind(buffers))
c.on('end', function () {
var data = Buffer.concat(buffers)
// parse incoming data as an HTTP request and extra HTTP headers
console.log(httpHeaders(data))
})
}).listen(8080)
http.ServerReponse
support
If given an instance of http.ServerResponse
, the reponse headers is
automatically extracted, parsed and returned:
var http = require('http')
var httpHeaders = require('http-headers')
http.createServer(function (req, res) {
res.end('Hello World')
console.log(httpHeaders(res))
}).listen(8080)
Why?
If you've ever needed to log or in another way access the headers sent
to the client on a http.ServerResponse
in Node.js, you know it's not
as easy as with the http.IncomingMessage
headers (which you just
access via request.headers['content-type']
).
Response headers are not directly available on the response
object.
Instead all headers are preprocessed as a string on the private
response._header
property and needs to be processed in order to be
available as an object.
This module makes the task super simple.
API
The http-headers module exposes a single parser function:
httpHeaders(data[, onlyHeaders])
Arguments:
data
- A string, buffer or instance ofhttp.ServerReponse
onlyHeaders
- An optional boolean. Iftrue
, only the headers object will be returned. Defaults tofalse
Request example
If given a request as input:
GET /foo HTTP/1.1
Date: Tue, 10 Jun 2014 07:19:27 GMT
Connection: keep-alive
Transfer-Encoding: chunked
Hello World
Returns:
{
method: 'GET',
url: '/foo',
version: { major: 1, minor: 1 },
headers: {
date: 'Tue, 10 Jun 2014 07:19:27 GMT',
connection: 'keep-alive',
'transfer-encoding': 'chunked'
}
}
Response example
If given a request as input:
HTTP/1.1 200 OK
Date: Tue, 10 Jun 2014 07:19:27 GMT
Connection: keep-alive
Transfer-Encoding: chunked
Hello World
Returns:
{
version: { major: 1, minor: 1 },
statusCode: 200,
statusMessage: 'OK',
headers: {
date: 'Tue, 10 Jun 2014 07:19:27 GMT',
connection: 'keep-alive',
'transfer-encoding': 'chunked'
}
}
onlyHeaders
example
If the optional second argument is set to true
, only headers are
returned no matter the type of input:
{
date: 'Tue, 10 Jun 2014 07:19:27 GMT',
connection: 'keep-alive',
'transfer-encoding': 'chunked'
}
No Start-Line
If the data
given does not contain an HTTP Start-Line, only the
headers are returned, even if the onlyHeaders
argument is false
:
Date: Tue, 10 Jun 2014 07:19:27 GMT
Connection: keep-alive
Transfer-Encoding: chunked
Hello World
Returns:
{
date: 'Tue, 10 Jun 2014 07:19:27 GMT',
connection: 'keep-alive',
'transfer-encoding': 'chunked'
}
License
MIT