Version 1

[yaffs-website] / node_modules / uncss / node_modules / request / lib / redirect.js

diff --git a/node_modules/uncss/node_modules/request/lib/redirect.js b/node_modules/uncss/node_modules/request/lib/redirect.js
new file mode 100644 (file)
index 0000000..040dfe0
--- /dev/null
+++ b/node_modules/uncss/node_modules/request/lib/redirect.js
@@ -0,0 +1,153 @@
+'use strict'
+
+var url = require('url')
+var isUrl = /^https?:/
+
+function Redirect (request) {
+  this.request = request
+  this.followRedirect = true
+  this.followRedirects = true
+  this.followAllRedirects = false
+  this.allowRedirect = function () {return true}
+  this.maxRedirects = 10
+  this.redirects = []
+  this.redirectsFollowed = 0
+  this.removeRefererHeader = false
+}
+
+Redirect.prototype.onRequest = function (options) {
+  var self = this
+
+  if (options.maxRedirects !== undefined) {
+    self.maxRedirects = options.maxRedirects
+  }
+  if (typeof options.followRedirect === 'function') {
+    self.allowRedirect = options.followRedirect
+  }
+  if (options.followRedirect !== undefined) {
+    self.followRedirects = !!options.followRedirect
+  }
+  if (options.followAllRedirects !== undefined) {
+    self.followAllRedirects = options.followAllRedirects
+  }
+  if (self.followRedirects || self.followAllRedirects) {
+    self.redirects = self.redirects || []
+  }
+  if (options.removeRefererHeader !== undefined) {
+    self.removeRefererHeader = options.removeRefererHeader
+  }
+}
+
+Redirect.prototype.redirectTo = function (response) {
+  var self = this
+    , request = self.request
+
+  var redirectTo = null
+  if (response.statusCode >= 300 && response.statusCode < 400 && response.caseless.has('location')) {
+    var location = response.caseless.get('location')
+    request.debug('redirect', location)
+
+    if (self.followAllRedirects) {
+      redirectTo = location
+    } else if (self.followRedirects) {
+      switch (request.method) {
+        case 'PATCH':
+        case 'PUT':
+        case 'POST':
+        case 'DELETE':
+          // Do not follow redirects
+          break
+        default:
+          redirectTo = location
+          break
+      }
+    }
+  } else if (response.statusCode === 401) {
+    var authHeader = request._auth.onResponse(response)
+    if (authHeader) {
+      request.setHeader('authorization', authHeader)
+      redirectTo = request.uri
+    }
+  }
+  return redirectTo
+}
+
+Redirect.prototype.onResponse = function (response) {
+  var self = this
+    , request = self.request
+
+  var redirectTo = self.redirectTo(response)
+  if (!redirectTo || !self.allowRedirect.call(request, response)) {
+    return false
+  }
+
+  request.debug('redirect to', redirectTo)
+
+  // 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)
+
+  // handle the case where we change protocol from https to http or vice versa
+  if (request.uri.protocol !== uriPrev.protocol) {
+    delete request.agent
+  }
+
+  self.redirects.push(
+    { statusCode : response.statusCode
+    , redirectUri: redirectTo
+    }
+  )
+  if (self.followAllRedirects && request.method !== 'HEAD'
+    && response.statusCode !== 401 && response.statusCode !== 307) {
+    request.method = 'GET'
+  }
+  // request.method = 'GET' // Force all redirects to use GET || commented out fixes #215
+  delete request.src
+  delete request.req
+  delete request._started
+  if (response.statusCode !== 401 && response.statusCode !== 307) {
+    // Remove parameters from the previous response, unless this is the second request
+    // for a server that requires digest authentication.
+    delete request.body
+    delete request._form
+    if (request.headers) {
+      request.removeHeader('host')
+      request.removeHeader('content-type')
+      request.removeHeader('content-length')
+      if (request.uri.hostname !== request.originalHost.split(':')[0]) {
+        // Remove authorization if changing hostnames (but not if just
+        // changing ports or protocols).  This matches the behavior of curl:
+        // https://github.com/bagder/curl/blob/6beb0eee/lib/http.c#L710
+        request.removeHeader('authorization')
+      }
+    }
+  }
+
+  if (!self.removeRefererHeader) {
+    request.setHeader('referer', uriPrev.href)
+  }
+
+  request.emit('redirect')
+
+  request.init()
+
+  return true
+}
+
+exports.Redirect = Redirect