Move the XHR callback to a separate file

index.js

@@ -142,6 +142,8 @@ Pjax.prototype = {
 
   doRequest: require("./lib/send-request.js"),
 
+  handleResponse: require("./lib/proto/handle-response.js"),
+
   loadUrl: function(href, options) {
     options = typeof options === "object" ?
       extend({}, this.options, options) :
@@ -155,66 +157,7 @@ Pjax.prototype = {
     trigger(document, "pjax:send", options)
 
     // Do the request
-    this.request = this.doRequest(href, options, function(html, request) {
+    this.request = this.doRequest(href, options, this.handleResponse.bind(this))
-      // Fail if unable to load HTML via AJAX
-      if (html === false) {
-        trigger(document, "pjax:complete pjax:error", options)
-
-        return
-      }
-
-      // push scroll position to history
-      var currentState = window.history.state || {}
-      window.history.replaceState({
-          url: currentState.url || window.location.href,
-          title: currentState.title || document.title,
-          uid: currentState.uid || newUid(),
-          scrollPos: [document.documentElement.scrollLeft || document.body.scrollLeft,
-            document.documentElement.scrollTop || document.body.scrollTop]
-        },
-        document.title, window.location)
-
-      var oldHref = href
-      if (request.responseURL) {
-        if (href !== request.responseURL) {
-          href = request.responseURL
-        }
-      }
-      else if (request.getResponseHeader("X-PJAX-URL")) {
-        href = request.getResponseHeader("X-PJAX-URL")
-      }
-      else if (request.getResponseHeader("X-XHR-Redirected-To")) {
-        href = request.getResponseHeader("X-XHR-Redirected-To")
-      }
-
-      // Add back the hash if it was removed
-      var a = document.createElement("a")
-      a.href = oldHref
-      var oldHash = a.hash
-      a.href = href
-      if (oldHash && !a.hash) {
-        a.hash = oldHash
-        href = a.href
-      }
-
-      this.state.href = href
-      this.state.options = clone(options)
-
-      try {
-        this.loadContent(html, options)
-      }
-      catch (e) {
-        if (!this.options.debug) {
-          if (console && console.error) {
-            console.error("Pjax switch fail: ", e)
-          }
-          return this.latestChance(href)
-        }
-        else {
-          throw e
-        }
-      }
-    }.bind(this))
   },
 
   afterAllSwitches: function() {

lib/proto/handle-response.js

@@ -0,0 +1,65 @@
+var clone = require("./lib/clone.js")
+var newUid = require("./lib/uniqueid.js")
+var trigger = require("./lib/events/trigger.js")
+
+module.export = function(responseText, request, href) {
+  // Fail if unable to load HTML via AJAX
+  if (responseText === false) {
+    trigger(document, "pjax:complete pjax:error", this.options)
+
+    return
+  }
+
+  // push scroll position to history
+  var currentState = window.history.state || {}
+  window.history.replaceState({
+      url: currentState.url || window.location.href,
+      title: currentState.title || document.title,
+      uid: currentState.uid || newUid(),
+      scrollPos: [document.documentElement.scrollLeft || document.body.scrollLeft,
+        document.documentElement.scrollTop || document.body.scrollTop]
+    },
+    document.title, window.location)
+
+  // Check for redirects
+  var oldHref = href
+  if (request.responseURL) {
+    if (href !== request.responseURL) {
+      href = request.responseURL
+    }
+  }
+  else if (request.getResponseHeader("X-PJAX-URL")) {
+    href = request.getResponseHeader("X-PJAX-URL")
+  }
+  else if (request.getResponseHeader("X-XHR-Redirected-To")) {
+    href = request.getResponseHeader("X-XHR-Redirected-To")
+  }
+
+  // Add back the hash if it was removed
+  var a = document.createElement("a")
+  a.href = oldHref
+  var oldHash = a.hash
+  a.href = href
+  if (oldHash && !a.hash) {
+    a.hash = oldHash
+    href = a.href
+  }
+
+  this.state.href = href
+  this.state.options = clone(this.options)
+
+  try {
+    this.loadContent(responseText, this.options)
+  }
+  catch (e) {
+    if (!this.options.debug) {
+      if (console && console.error) {
+        console.error("Pjax switch fail: ", e)
+      }
+      return this.latestChance(href)
+    }
+    else {
+      throw e
+    }
+  }
+}

lib/send-request.js

@@ -13,21 +13,21 @@ module.exports = function(location, options, callback) {
   request.onreadystatechange = function() {
     if (request.readyState === 4) {
       if (request.status === 200) {
-        callback(request.responseText, request)
+        callback(request.responseText, request, location)
       }
       else {
-        callback(null, request)
+        callback(null, request, location)
       }
     }
   }
 
   request.onerror = function(e) {
     console.log(e)
-    callback(null, request)
+    callback(null, request, location)
   }
 
   request.ontimeout = function() {
-    callback(null, request)
+    callback(null, request, location)
   }
 
   // Prepare the request payload for forms, if available