All files / request/lib redirect.js

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'use strict'
 
var url = require('url')
var isUrl = /^https?:/
 
function Redirect (request) {
  this.request = request
  this.maxRedirects = 10
  this.redirectsFollowed = 0
}
 
Redirect.prototype.onResponse = function (response) {
  var self = this
  var request = self.request
 
  if (response.statusCode < 300 || response.statusCode >= 400 || !('location' in response.headers)) {
    return false
  }
  var redirectTo = response.headers.location
 
  // ignore any potential response body.  it cannot possibly be useful
  // to us at this point.
  // response.resume should be defined, but check anyway before calling. Workaround for browserify.
  if (response.resume) {
    response.resume()
  }
 
  if (self.redirectsFollowed >= self.maxRedirects) {
    request.emit('error', new Error('Exceeded maxRedirects. Probably stuck in a redirect loop ' + request.uri.href))
    return false
  }
  self.redirectsFollowed += 1
 
  if (!isUrl.test(redirectTo)) {
    redirectTo = url.resolve(request.uri.href, redirectTo)
  }
 
  var uriPrev = request.uri
  request.uri = url.parse(redirectTo)
 
  delete request.req
  delete request._started
 
  request.headers.referer = uriPrev.href
 
  request.emit('redirect')
 
  request.init()
 
  return true
}
 
exports.Redirect = Redirect