实现资源静态化

includes/header.php

@@ -12,13 +12,12 @@ error_reporting(0);
             echo $siteTitle ?></title>
     <meta name="keywords" content="<?php echo getInfo('keywords') ?>">
     <meta name="description" content="<?php echo getInfo('description') ?>">
-    <link rel="stylesheet" href="https://static.llilii.cn/css/other/background.css" />
     <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/[email protected]/dist/css/mdui.min.css" />
-    <script src="https://static.llilii.cn/libs/jquery/3.5.1/jquery.min.js"></script>
-    <script src="https://static.llilii.cn/libs/pjax/jquery.pjax.js"></script>
-    <script src="https://static.llilii.cn/libs/md5/jquery.md5.js"></script>
     <script src="https://static.llilii.cn/libs/loveway/main.js"></script>
-    <script src="https://static.llilii.cn/libs/clipboard/clipboard.min.js"></script>
+    <script src="/static/jquery.min.js"></script>
+    <script src="/static/jquery.pjax.js"></script>
+    <script src="/static/jquery.md5.js"></script>
+    <script src="/static/clipboard.min.js"></script>
     <style>
         .copyright {
             box-sizing: border-box;

static/jquery.md5.js

@@ -0,0 +1,234 @@
+/**
+ * jQuery MD5 hash algorithm function
+ * 
+ *   <code>
+ *     Calculate the md5 hash of a String 
+ *     String $.md5 ( String str )
+ *   </code>
+ * 
+ * Calculates the MD5 hash of str using the » RSA Data Security, Inc. MD5 Message-Digest Algorithm, and returns that hash. 
+ * MD5 (Message-Digest algorithm 5) is a widely-used cryptographic hash function with a 128-bit hash value. MD5 has been employed in a wide variety of security applications, and is also commonly used to check the integrity of data. The generated hash is also non-reversable. Data cannot be retrieved from the message digest, the digest uniquely identifies the data.
+ * MD5 was developed by Professor Ronald L. Rivest in 1994. Its 128 bit (16 byte) message digest makes it a faster implementation than SHA-1.
+ * This script is used to process a variable length message into a fixed-length output of 128 bits using the MD5 algorithm. It is fully compatible with UTF-8 encoding. It is very useful when u want to transfer encrypted passwords over the internet. If you plan using UTF-8 encoding in your project don't forget to set the page encoding to UTF-8 (Content-Type meta tag). 
+ * This function orginally get from the WebToolkit and rewrite for using as the jQuery plugin.
+ * 
+ * Example
+ *   Code
+ *     <code>
+ *       $.md5("I'm Persian."); 
+ *     </code>
+ *   Result
+ *     <code>
+ *       "b8c901d0f02223f9761016cfff9d68df"
+ *     </code>
+ * 
+ * @alias Muhammad Hussein Fattahizadeh < muhammad [AT] semnanweb [DOT] com >
+ * @link http://www.semnanweb.com/jquery-plugin/md5.html
+ * @see http://www.webtoolkit.info/
+ * @license http://www.gnu.org/licenses/gpl.html [GNU General Public License]
+ * @param {jQuery} {md5:function(string))
+ * @return string
+ */
+(function($) {
+    var rotateLeft = function(lValue, iShiftBits) {
+        return (lValue << iShiftBits) | (lValue >>> (32 - iShiftBits));
+    }
+    var addUnsigned = function(lX, lY) {
+        var lX4, lY4, lX8, lY8, lResult;
+        lX8 = (lX & 0x80000000);
+        lY8 = (lY & 0x80000000);
+        lX4 = (lX & 0x40000000);
+        lY4 = (lY & 0x40000000);
+        lResult = (lX & 0x3FFFFFFF) + (lY & 0x3FFFFFFF);
+        if (lX4 & lY4) return (lResult ^ 0x80000000 ^ lX8 ^ lY8);
+        if (lX4 | lY4) {
+            if (lResult & 0x40000000) return (lResult ^ 0xC0000000 ^ lX8 ^ lY8);
+            else return (lResult ^ 0x40000000 ^ lX8 ^ lY8);
+        } else {
+            return (lResult ^ lX8 ^ lY8);
+        }
+    }
+    var F = function(x, y, z) {
+        return (x & y) | ((~x) & z);
+    }
+    var G = function(x, y, z) {
+        return (x & z) | (y & (~z));
+    }
+    var H = function(x, y, z) {
+        return (x ^ y ^ z);
+    }
+    var I = function(x, y, z) {
+        return (y ^ (x | (~z)));
+    }
+    var FF = function(a, b, c, d, x, s, ac) {
+        a = addUnsigned(a, addUnsigned(addUnsigned(F(b, c, d), x), ac));
+        return addUnsigned(rotateLeft(a, s), b);
+    };
+    var GG = function(a, b, c, d, x, s, ac) {
+        a = addUnsigned(a, addUnsigned(addUnsigned(G(b, c, d), x), ac));
+        return addUnsigned(rotateLeft(a, s), b);
+    };
+    var HH = function(a, b, c, d, x, s, ac) {
+        a = addUnsigned(a, addUnsigned(addUnsigned(H(b, c, d), x), ac));
+        return addUnsigned(rotateLeft(a, s), b);
+    };
+    var II = function(a, b, c, d, x, s, ac) {
+        a = addUnsigned(a, addUnsigned(addUnsigned(I(b, c, d), x), ac));
+        return addUnsigned(rotateLeft(a, s), b);
+    };
+    var convertToWordArray = function(string) {
+        var lWordCount;
+        var lMessageLength = string.length;
+        var lNumberOfWordsTempOne = lMessageLength + 8;
+        var lNumberOfWordsTempTwo = (lNumberOfWordsTempOne - (lNumberOfWordsTempOne % 64)) / 64;
+        var lNumberOfWords = (lNumberOfWordsTempTwo + 1) * 16;
+        var lWordArray = Array(lNumberOfWords - 1);
+        var lBytePosition = 0;
+        var lByteCount = 0;
+        while (lByteCount < lMessageLength) {
+            lWordCount = (lByteCount - (lByteCount % 4)) / 4;
+            lBytePosition = (lByteCount % 4) * 8;
+            lWordArray[lWordCount] = (lWordArray[lWordCount] | (string.charCodeAt(lByteCount) << lBytePosition));
+            lByteCount++;
+        }
+        lWordCount = (lByteCount - (lByteCount % 4)) / 4;
+        lBytePosition = (lByteCount % 4) * 8;
+        lWordArray[lWordCount] = lWordArray[lWordCount] | (0x80 << lBytePosition);
+        lWordArray[lNumberOfWords - 2] = lMessageLength << 3;
+        lWordArray[lNumberOfWords - 1] = lMessageLength >>> 29;
+        return lWordArray;
+    };
+    var wordToHex = function(lValue) {
+        var WordToHexValue = "",
+            WordToHexValueTemp = "",
+            lByte, lCount;
+        for (lCount = 0; lCount <= 3; lCount++) {
+            lByte = (lValue >>> (lCount * 8)) & 255;
+            WordToHexValueTemp = "0" + lByte.toString(16);
+            WordToHexValue = WordToHexValue + WordToHexValueTemp.substr(WordToHexValueTemp.length - 2, 2);
+        }
+        return WordToHexValue;
+    };
+    var uTF8Encode = function(string) {
+        string = string.replace(/\x0d\x0a/g, "\x0a");
+        var output = "";
+        for (var n = 0; n < string.length; n++) {
+            var c = string.charCodeAt(n);
+            if (c < 128) {
+                output += String.fromCharCode(c);
+            } else if ((c > 127) && (c < 2048)) {
+                output += String.fromCharCode((c >> 6) | 192);
+                output += String.fromCharCode((c & 63) | 128);
+            } else {
+                output += String.fromCharCode((c >> 12) | 224);
+                output += String.fromCharCode(((c >> 6) & 63) | 128);
+                output += String.fromCharCode((c & 63) | 128);
+            }
+        }
+        return output;
+    };
+    $.extend({
+        md5: function(string) {
+            var x = Array();
+            var k, AA, BB, CC, DD, a, b, c, d;
+            var S11 = 7,
+                S12 = 12,
+                S13 = 17,
+                S14 = 22;
+            var S21 = 5,
+                S22 = 9,
+                S23 = 14,
+                S24 = 20;
+            var S31 = 4,
+                S32 = 11,
+                S33 = 16,
+                S34 = 23;
+            var S41 = 6,
+                S42 = 10,
+                S43 = 15,
+                S44 = 21;
+            string = uTF8Encode(string);
+            x = convertToWordArray(string);
+            a = 0x67452301;
+            b = 0xEFCDAB89;
+            c = 0x98BADCFE;
+            d = 0x10325476;
+            for (k = 0; k < x.length; k += 16) {
+                AA = a;
+                BB = b;
+                CC = c;
+                DD = d;
+                a = FF(a, b, c, d, x[k + 0], S11, 0xD76AA478);
+                d = FF(d, a, b, c, x[k + 1], S12, 0xE8C7B756);
+                c = FF(c, d, a, b, x[k + 2], S13, 0x242070DB);
+                b = FF(b, c, d, a, x[k + 3], S14, 0xC1BDCEEE);
+                a = FF(a, b, c, d, x[k + 4], S11, 0xF57C0FAF);
+                d = FF(d, a, b, c, x[k + 5], S12, 0x4787C62A);
+                c = FF(c, d, a, b, x[k + 6], S13, 0xA8304613);
+                b = FF(b, c, d, a, x[k + 7], S14, 0xFD469501);
+                a = FF(a, b, c, d, x[k + 8], S11, 0x698098D8);
+                d = FF(d, a, b, c, x[k + 9], S12, 0x8B44F7AF);
+                c = FF(c, d, a, b, x[k + 10], S13, 0xFFFF5BB1);
+                b = FF(b, c, d, a, x[k + 11], S14, 0x895CD7BE);
+                a = FF(a, b, c, d, x[k + 12], S11, 0x6B901122);
+                d = FF(d, a, b, c, x[k + 13], S12, 0xFD987193);
+                c = FF(c, d, a, b, x[k + 14], S13, 0xA679438E);
+                b = FF(b, c, d, a, x[k + 15], S14, 0x49B40821);
+                a = GG(a, b, c, d, x[k + 1], S21, 0xF61E2562);
+                d = GG(d, a, b, c, x[k + 6], S22, 0xC040B340);
+                c = GG(c, d, a, b, x[k + 11], S23, 0x265E5A51);
+                b = GG(b, c, d, a, x[k + 0], S24, 0xE9B6C7AA);
+                a = GG(a, b, c, d, x[k + 5], S21, 0xD62F105D);
+                d = GG(d, a, b, c, x[k + 10], S22, 0x2441453);
+                c = GG(c, d, a, b, x[k + 15], S23, 0xD8A1E681);
+                b = GG(b, c, d, a, x[k + 4], S24, 0xE7D3FBC8);
+                a = GG(a, b, c, d, x[k + 9], S21, 0x21E1CDE6);
+                d = GG(d, a, b, c, x[k + 14], S22, 0xC33707D6);
+                c = GG(c, d, a, b, x[k + 3], S23, 0xF4D50D87);
+                b = GG(b, c, d, a, x[k + 8], S24, 0x455A14ED);
+                a = GG(a, b, c, d, x[k + 13], S21, 0xA9E3E905);
+                d = GG(d, a, b, c, x[k + 2], S22, 0xFCEFA3F8);
+                c = GG(c, d, a, b, x[k + 7], S23, 0x676F02D9);
+                b = GG(b, c, d, a, x[k + 12], S24, 0x8D2A4C8A);
+                a = HH(a, b, c, d, x[k + 5], S31, 0xFFFA3942);
+                d = HH(d, a, b, c, x[k + 8], S32, 0x8771F681);
+                c = HH(c, d, a, b, x[k + 11], S33, 0x6D9D6122);
+                b = HH(b, c, d, a, x[k + 14], S34, 0xFDE5380C);
+                a = HH(a, b, c, d, x[k + 1], S31, 0xA4BEEA44);
+                d = HH(d, a, b, c, x[k + 4], S32, 0x4BDECFA9);
+                c = HH(c, d, a, b, x[k + 7], S33, 0xF6BB4B60);
+                b = HH(b, c, d, a, x[k + 10], S34, 0xBEBFBC70);
+                a = HH(a, b, c, d, x[k + 13], S31, 0x289B7EC6);
+                d = HH(d, a, b, c, x[k + 0], S32, 0xEAA127FA);
+                c = HH(c, d, a, b, x[k + 3], S33, 0xD4EF3085);
+                b = HH(b, c, d, a, x[k + 6], S34, 0x4881D05);
+                a = HH(a, b, c, d, x[k + 9], S31, 0xD9D4D039);
+                d = HH(d, a, b, c, x[k + 12], S32, 0xE6DB99E5);
+                c = HH(c, d, a, b, x[k + 15], S33, 0x1FA27CF8);
+                b = HH(b, c, d, a, x[k + 2], S34, 0xC4AC5665);
+                a = II(a, b, c, d, x[k + 0], S41, 0xF4292244);
+                d = II(d, a, b, c, x[k + 7], S42, 0x432AFF97);
+                c = II(c, d, a, b, x[k + 14], S43, 0xAB9423A7);
+                b = II(b, c, d, a, x[k + 5], S44, 0xFC93A039);
+                a = II(a, b, c, d, x[k + 12], S41, 0x655B59C3);
+                d = II(d, a, b, c, x[k + 3], S42, 0x8F0CCC92);
+                c = II(c, d, a, b, x[k + 10], S43, 0xFFEFF47D);
+                b = II(b, c, d, a, x[k + 1], S44, 0x85845DD1);
+                a = II(a, b, c, d, x[k + 8], S41, 0x6FA87E4F);
+                d = II(d, a, b, c, x[k + 15], S42, 0xFE2CE6E0);
+                c = II(c, d, a, b, x[k + 6], S43, 0xA3014314);
+                b = II(b, c, d, a, x[k + 13], S44, 0x4E0811A1);
+                a = II(a, b, c, d, x[k + 4], S41, 0xF7537E82);
+                d = II(d, a, b, c, x[k + 11], S42, 0xBD3AF235);
+                c = II(c, d, a, b, x[k + 2], S43, 0x2AD7D2BB);
+                b = II(b, c, d, a, x[k + 9], S44, 0xEB86D391);
+                a = addUnsigned(a, AA);
+                b = addUnsigned(b, BB);
+                c = addUnsigned(c, CC);
+                d = addUnsigned(d, DD);
+            }
+            var tempValue = wordToHex(a) + wordToHex(b) + wordToHex(c) + wordToHex(d);
+            return tempValue.toLowerCase();
+        }
+    });
+})(jQuery);

static/jquery.pjax.js

@@ -0,0 +1,903 @@
+/*!
+ * Copyright 2012, Chris Wanstrath
+ * Released under the MIT License
+ * https://github.com/defunkt/jquery-pjax
+ */
+
+(function($){
+
+// When called on a container with a selector, fetches the href with
+// ajax into the container or with the data-pjax attribute on the link
+// itself.
+//
+// Tries to make sure the back button and ctrl+click work the way
+// you'd expect.
+//
+// Exported as $.fn.pjax
+//
+// Accepts a jQuery ajax options object that may include these
+// pjax specific options:
+//
+//
+// container - String selector for the element where to place the response body.
+//      push - Whether to pushState the URL. Defaults to true (of course).
+//   replace - Want to use replaceState instead? That's cool.
+//
+// For convenience the second parameter can be either the container or
+// the options object.
+//
+// Returns the jQuery object
+function fnPjax(selector, container, options) {
+  options = optionsFor(container, options)
+  return this.on('click.pjax', selector, function(event) {
+    var opts = options
+    if (!opts.container) {
+      opts = $.extend({}, options)
+      opts.container = $(this).attr('data-pjax')
+    }
+    handleClick(event, opts)
+  })
+}
+
+// Public: pjax on click handler
+//
+// Exported as $.pjax.click.
+//
+// event   - "click" jQuery.Event
+// options - pjax options
+//
+// Examples
+//
+//   $(document).on('click', 'a', $.pjax.click)
+//   // is the same as
+//   $(document).pjax('a')
+//
+// Returns nothing.
+function handleClick(event, container, options) {
+  options = optionsFor(container, options)
+
+  var link = event.currentTarget
+  var $link = $(link)
+
+  if (link.tagName.toUpperCase() !== 'A')
+    throw "$.fn.pjax or $.pjax.click requires an anchor element"
+
+  // Middle click, cmd click, and ctrl click should open
+  // links in a new tab as normal.
+  if ( event.which > 1 || event.metaKey || event.ctrlKey || event.shiftKey || event.altKey )
+    return
+
+  // Ignore cross origin links
+  if ( location.protocol !== link.protocol || location.hostname !== link.hostname )
+    return
+
+  // Ignore case when a hash is being tacked on the current URL
+  if ( link.href.indexOf('#') > -1 && stripHash(link) == stripHash(location) )
+    return
+
+  // Ignore event with default prevented
+  if (event.isDefaultPrevented())
+    return
+
+  var defaults = {
+    url: link.href,
+    container: $link.attr('data-pjax'),
+    target: link
+  }
+
+  var opts = $.extend({}, defaults, options)
+  var clickEvent = $.Event('pjax:click')
+  $link.trigger(clickEvent, [opts])
+
+  if (!clickEvent.isDefaultPrevented()) {
+    pjax(opts)
+    event.preventDefault()
+    $link.trigger('pjax:clicked', [opts])
+  }
+}
+
+// Public: pjax on form submit handler
+//
+// Exported as $.pjax.submit
+//
+// event   - "click" jQuery.Event
+// options - pjax options
+//
+// Examples
+//
+//  $(document).on('submit', 'form', function(event) {
+//    $.pjax.submit(event, '[data-pjax-container]')
+//  })
+//
+// Returns nothing.
+function handleSubmit(event, container, options) {
+  options = optionsFor(container, options)
+
+  var form = event.currentTarget
+  var $form = $(form)
+
+  if (form.tagName.toUpperCase() !== 'FORM')
+    throw "$.pjax.submit requires a form element"
+
+  var defaults = {
+    type: ($form.attr('method') || 'GET').toUpperCase(),
+    url: $form.attr('action'),
+    container: $form.attr('data-pjax'),
+    target: form
+  }
+
+  if (defaults.type !== 'GET' && window.FormData !== undefined) {
+    defaults.data = new FormData(form)
+    defaults.processData = false
+    defaults.contentType = false
+  } else {
+    // Can't handle file uploads, exit
+    if ($form.find(':file').length) {
+      return
+    }
+
+    // Fallback to manually serializing the fields
+    defaults.data = $form.serializeArray()
+  }
+
+  pjax($.extend({}, defaults, options))
+
+  event.preventDefault()
+}
+
+// Loads a URL with ajax, puts the response body inside a container,
+// then pushState()'s the loaded URL.
+//
+// Works just like $.ajax in that it accepts a jQuery ajax
+// settings object (with keys like url, type, data, etc).
+//
+// Accepts these extra keys:
+//
+// container - String selector for where to stick the response body.
+//      push - Whether to pushState the URL. Defaults to true (of course).
+//   replace - Want to use replaceState instead? That's cool.
+//
+// Use it just like $.ajax:
+//
+//   var xhr = $.pjax({ url: this.href, container: '#main' })
+//   console.log( xhr.readyState )
+//
+// Returns whatever $.ajax returns.
+function pjax(options) {
+  options = $.extend(true, {}, $.ajaxSettings, pjax.defaults, options)
+
+  if ($.isFunction(options.url)) {
+    options.url = options.url()
+  }
+
+  var hash = parseURL(options.url).hash
+
+  var containerType = $.type(options.container)
+  if (containerType !== 'string') {
+    throw "expected string value for 'container' option; got " + containerType
+  }
+  var context = options.context = $(options.container)
+  if (!context.length) {
+    throw "the container selector '" + options.container + "' did not match anything"
+  }
+
+  // We want the browser to maintain two separate internal caches: one
+  // for pjax'd partial page loads and one for normal page loads.
+  // Without adding this secret parameter, some browsers will often
+  // confuse the two.
+  if (!options.data) options.data = {}
+  if ($.isArray(options.data)) {
+    options.data.push({name: '_pjax', value: options.container})
+  } else {
+    options.data._pjax = options.container
+  }
+
+  function fire(type, args, props) {
+    if (!props) props = {}
+    props.relatedTarget = options.target
+    var event = $.Event(type, props)
+    context.trigger(event, args)
+    return !event.isDefaultPrevented()
+  }
+
+  var timeoutTimer
+
+  options.beforeSend = function(xhr, settings) {
+    // No timeout for non-GET requests
+    // Its not safe to request the resource again with a fallback method.
+    if (settings.type !== 'GET') {
+      settings.timeout = 0
+    }
+
+    xhr.setRequestHeader('X-PJAX', 'true')
+    xhr.setRequestHeader('X-PJAX-Container', options.container)
+
+    if (!fire('pjax:beforeSend', [xhr, settings]))
+      return false
+
+    if (settings.timeout > 0) {
+      timeoutTimer = setTimeout(function() {
+        if (fire('pjax:timeout', [xhr, options]))
+          xhr.abort('timeout')
+      }, settings.timeout)
+
+      // Clear timeout setting so jquerys internal timeout isn't invoked
+      settings.timeout = 0
+    }
+
+    var url = parseURL(settings.url)
+    if (hash) url.hash = hash
+    options.requestUrl = stripInternalParams(url)
+  }
+
+  options.complete = function(xhr, textStatus) {
+    if (timeoutTimer)
+      clearTimeout(timeoutTimer)
+
+    fire('pjax:complete', [xhr, textStatus, options])
+
+    fire('pjax:end', [xhr, options])
+  }
+
+  options.error = function(xhr, textStatus, errorThrown) {
+    var container = extractContainer("", xhr, options)
+
+    var allowed = fire('pjax:error', [xhr, textStatus, errorThrown, options])
+    if (options.type == 'GET' && textStatus !== 'abort' && allowed) {
+      locationReplace(container.url)
+    }
+  }
+
+  options.success = function(data, status, xhr) {
+    var previousState = pjax.state
+
+    // If $.pjax.defaults.version is a function, invoke it first.
+    // Otherwise it can be a static string.
+    var currentVersion = typeof $.pjax.defaults.version === 'function' ?
+      $.pjax.defaults.version() :
+      $.pjax.defaults.version
+
+    var latestVersion = xhr.getResponseHeader('X-PJAX-Version')
+
+    var container = extractContainer(data, xhr, options)
+
+    var url = parseURL(container.url)
+    if (hash) {
+      url.hash = hash
+      container.url = url.href
+    }
+
+    // If there is a layout version mismatch, hard load the new url
+    if (currentVersion && latestVersion && currentVersion !== latestVersion) {
+      locationReplace(container.url)
+      return
+    }
+
+    // If the new response is missing a body, hard load the page
+    if (!container.contents) {
+      locationReplace(container.url)
+      return
+    }
+
+    pjax.state = {
+      id: options.id || uniqueId(),
+      url: container.url,
+      title: container.title,
+      container: options.container,
+      fragment: options.fragment,
+      timeout: options.timeout
+    }
+
+    if (options.push || options.replace) {
+      window.history.replaceState(pjax.state, container.title, container.url)
+    }
+
+    // Only blur the focus if the focused element is within the container.
+    var blurFocus = $.contains(context, document.activeElement)
+
+    // Clear out any focused controls before inserting new page contents.
+    if (blurFocus) {
+      try {
+        document.activeElement.blur()
+      } catch (e) { /* ignore */ }
+    }
+
+    if (container.title) document.title = container.title
+
+    fire('pjax:beforeReplace', [container.contents, options], {
+      state: pjax.state,
+      previousState: previousState
+    })
+    context.html(container.contents)
+
+    // FF bug: Won't autofocus fields that are inserted via JS.
+    // This behavior is incorrect. So if theres no current focus, autofocus
+    // the last field.
+    //
+    // http://www.w3.org/html/wg/drafts/html/master/forms.html
+    var autofocusEl = context.find('input[autofocus], textarea[autofocus]').last()[0]
+    if (autofocusEl && document.activeElement !== autofocusEl) {
+      autofocusEl.focus()
+    }
+
+    executeScriptTags(container.scripts)
+
+    var scrollTo = options.scrollTo
+
+    // Ensure browser scrolls to the element referenced by the URL anchor
+    if (hash) {
+      var name = decodeURIComponent(hash.slice(1))
+      var target = document.getElementById(name) || document.getElementsByName(name)[0]
+      if (target) scrollTo = $(target).offset().top
+    }
+
+    if (typeof scrollTo == 'number') $(window).scrollTop(scrollTo)
+
+    fire('pjax:success', [data, status, xhr, options])
+  }
+
+
+  // Initialize pjax.state for the initial page load. Assume we're
+  // using the container and options of the link we're loading for the
+  // back button to the initial page. This ensures good back button
+  // behavior.
+  if (!pjax.state) {
+    pjax.state = {
+      id: uniqueId(),
+      url: window.location.href,
+      title: document.title,
+      container: options.container,
+      fragment: options.fragment,
+      timeout: options.timeout
+    }
+    window.history.replaceState(pjax.state, document.title)
+  }
+
+  // Cancel the current request if we're already pjaxing
+  abortXHR(pjax.xhr)
+
+  pjax.options = options
+  var xhr = pjax.xhr = $.ajax(options)
+
+  if (xhr.readyState > 0) {
+    if (options.push && !options.replace) {
+      // Cache current container element before replacing it
+      cachePush(pjax.state.id, [options.container, cloneContents(context)])
+
+      window.history.pushState(null, "", options.requestUrl)
+    }
+
+    fire('pjax:start', [xhr, options])
+    fire('pjax:send', [xhr, options])
+  }
+
+  return pjax.xhr
+}
+
+// Public: Reload current page with pjax.
+//
+// Returns whatever $.pjax returns.
+function pjaxReload(container, options) {
+  var defaults = {
+    url: window.location.href,
+    push: false,
+    replace: true,
+    scrollTo: false
+  }
+
+  return pjax($.extend(defaults, optionsFor(container, options)))
+}
+
+// Internal: Hard replace current state with url.
+//
+// Work for around WebKit
+//   https://bugs.webkit.org/show_bug.cgi?id=93506
+//
+// Returns nothing.
+function locationReplace(url) {
+  window.history.replaceState(null, "", pjax.state.url)
+  window.location.replace(url)
+}
+
+
+var initialPop = true
+var initialURL = window.location.href
+var initialState = window.history.state
+
+// Initialize $.pjax.state if possible
+// Happens when reloading a page and coming forward from a different
+// session history.
+if (initialState && initialState.container) {
+  pjax.state = initialState
+}
+
+// Non-webkit browsers don't fire an initial popstate event
+if ('state' in window.history) {
+  initialPop = false
+}
+
+// popstate handler takes care of the back and forward buttons
+//
+// You probably shouldn't use pjax on pages with other pushState
+// stuff yet.
+function onPjaxPopstate(event) {
+
+  // Hitting back or forward should override any pending PJAX request.
+  if (!initialPop) {
+    abortXHR(pjax.xhr)
+  }
+
+  var previousState = pjax.state
+  var state = event.state
+  var direction
+
+  if (state && state.container) {
+    // When coming forward from a separate history session, will get an
+    // initial pop with a state we are already at. Skip reloading the current
+    // page.
+    if (initialPop && initialURL == state.url) return
+
+    if (previousState) {
+      // If popping back to the same state, just skip.
+      // Could be clicking back from hashchange rather than a pushState.
+      if (previousState.id === state.id) return
+
+      // Since state IDs always increase, we can deduce the navigation direction
+      direction = previousState.id < state.id ? 'forward' : 'back'
+    }
+
+    var cache = cacheMapping[state.id] || []
+    var containerSelector = cache[0] || state.container
+    var container = $(containerSelector), contents = cache[1]
+
+    if (container.length) {
+      if (previousState) {
+        // Cache current container before replacement and inform the
+        // cache which direction the history shifted.
+        cachePop(direction, previousState.id, [containerSelector, cloneContents(container)])
+      }
+
+      var popstateEvent = $.Event('pjax:popstate', {
+        state: state,
+        direction: direction
+      })
+      container.trigger(popstateEvent)
+
+      var options = {
+        id: state.id,
+        url: state.url,
+        container: containerSelector,
+        push: false,
+        fragment: state.fragment,
+        timeout: state.timeout,
+        scrollTo: false
+      }
+
+      if (contents) {
+        container.trigger('pjax:start', [null, options])
+
+        pjax.state = state
+        if (state.title) document.title = state.title
+        var beforeReplaceEvent = $.Event('pjax:beforeReplace', {
+          state: state,
+          previousState: previousState
+        })
+        container.trigger(beforeReplaceEvent, [contents, options])
+        container.html(contents)
+
+        container.trigger('pjax:end', [null, options])
+      } else {
+        pjax(options)
+      }
+
+      // Force reflow/relayout before the browser tries to restore the
+      // scroll position.
+      container[0].offsetHeight // eslint-disable-line no-unused-expressions
+    } else {
+      locationReplace(location.href)
+    }
+  }
+  initialPop = false
+}
+
+// Fallback version of main pjax function for browsers that don't
+// support pushState.
+//
+// Returns nothing since it retriggers a hard form submission.
+function fallbackPjax(options) {
+  var url = $.isFunction(options.url) ? options.url() : options.url,
+      method = options.type ? options.type.toUpperCase() : 'GET'
+
+  var form = $('<form>', {
+    method: method === 'GET' ? 'GET' : 'POST',
+    action: url,
+    style: 'display:none'
+  })
+
+  if (method !== 'GET' && method !== 'POST') {
+    form.append($('<input>', {
+      type: 'hidden',
+      name: '_method',
+      value: method.toLowerCase()
+    }))
+  }
+
+  var data = options.data
+  if (typeof data === 'string') {
+    $.each(data.split('&'), function(index, value) {
+      var pair = value.split('=')
+      form.append($('<input>', {type: 'hidden', name: pair[0], value: pair[1]}))
+    })
+  } else if ($.isArray(data)) {
+    $.each(data, function(index, value) {
+      form.append($('<input>', {type: 'hidden', name: value.name, value: value.value}))
+    })
+  } else if (typeof data === 'object') {
+    var key
+    for (key in data)
+      form.append($('<input>', {type: 'hidden', name: key, value: data[key]}))
+  }
+
+  $(document.body).append(form)
+  form.submit()
+}
+
+// Internal: Abort an XmlHttpRequest if it hasn't been completed,
+// also removing its event handlers.
+function abortXHR(xhr) {
+  if ( xhr && xhr.readyState < 4) {
+    xhr.onreadystatechange = $.noop
+    xhr.abort()
+  }
+}
+
+// Internal: Generate unique id for state object.
+//
+// Use a timestamp instead of a counter since ids should still be
+// unique across page loads.
+//
+// Returns Number.
+function uniqueId() {
+  return (new Date).getTime()
+}
+
+function cloneContents(container) {
+  var cloned = container.clone()
+  // Unmark script tags as already being eval'd so they can get executed again
+  // when restored from cache. HAXX: Uses jQuery internal method.
+  cloned.find('script').each(function(){
+    if (!this.src) $._data(this, 'globalEval', false)
+  })
+  return cloned.contents()
+}
+
+// Internal: Strip internal query params from parsed URL.
+//
+// Returns sanitized url.href String.
+function stripInternalParams(url) {
+  url.search = url.search.replace(/([?&])(_pjax|_)=[^&]*/g, '').replace(/^&/, '')
+  return url.href.replace(/\?($|#)/, '$1')
+}
+
+// Internal: Parse URL components and returns a Locationish object.
+//
+// url - String URL
+//
+// Returns HTMLAnchorElement that acts like Location.
+function parseURL(url) {
+  var a = document.createElement('a')
+  a.href = url
+  return a
+}
+
+// Internal: Return the `href` component of given URL object with the hash
+// portion removed.
+//
+// location - Location or HTMLAnchorElement
+//
+// Returns String
+function stripHash(location) {
+  return location.href.replace(/#.*/, '')
+}
+
+// Internal: Build options Object for arguments.
+//
+// For convenience the first parameter can be either the container or
+// the options object.
+//
+// Examples
+//
+//   optionsFor('#container')
+//   // => {container: '#container'}
+//
+//   optionsFor('#container', {push: true})
+//   // => {container: '#container', push: true}
+//
+//   optionsFor({container: '#container', push: true})
+//   // => {container: '#container', push: true}
+//
+// Returns options Object.
+function optionsFor(container, options) {
+  if (container && options) {
+    options = $.extend({}, options)
+    options.container = container
+    return options
+  } else if ($.isPlainObject(container)) {
+    return container
+  } else {
+    return {container: container}
+  }
+}
+
+// Internal: Filter and find all elements matching the selector.
+//
+// Where $.fn.find only matches descendants, findAll will test all the
+// top level elements in the jQuery object as well.
+//
+// elems    - jQuery object of Elements
+// selector - String selector to match
+//
+// Returns a jQuery object.
+function findAll(elems, selector) {
+  return elems.filter(selector).add(elems.find(selector))
+}
+
+function parseHTML(html) {
+  return $.parseHTML(html, document, true)
+}
+
+// Internal: Extracts container and metadata from response.
+//
+// 1. Extracts X-PJAX-URL header if set
+// 2. Extracts inline <title> tags
+// 3. Builds response Element and extracts fragment if set
+//
+// data    - String response data
+// xhr     - XHR response
+// options - pjax options Object
+//
+// Returns an Object with url, title, and contents keys.
+function extractContainer(data, xhr, options) {
+  var obj = {}, fullDocument = /<html/i.test(data)
+
+  // Prefer X-PJAX-URL header if it was set, otherwise fallback to
+  // using the original requested url.
+  var serverUrl = xhr.getResponseHeader('X-PJAX-URL')
+  obj.url = serverUrl ? stripInternalParams(parseURL(serverUrl)) : options.requestUrl
+
+  var $head, $body
+  // Attempt to parse response html into elements
+  if (fullDocument) {
+    $body = $(parseHTML(data.match(/<body[^>]*>([\s\S.]*)<\/body>/i)[0]))
+    var head = data.match(/<head[^>]*>([\s\S.]*)<\/head>/i)
+    $head = head != null ? $(parseHTML(head[0])) : $body
+  } else {
+    $head = $body = $(parseHTML(data))
+  }
+
+  // If response data is empty, return fast
+  if ($body.length === 0)
+    return obj
+
+  // If there's a <title> tag in the header, use it as
+  // the page's title.
+  obj.title = findAll($head, 'title').last().text()
+
+  if (options.fragment) {
+    var $fragment = $body
+    // If they specified a fragment, look for it in the response
+    // and pull it out.
+    if (options.fragment !== 'body') {
+      $fragment = findAll($fragment, options.fragment).first()
+    }
+
+    if ($fragment.length) {
+      obj.contents = options.fragment === 'body' ? $fragment : $fragment.contents()
+
+      // If there's no title, look for data-title and title attributes
+      // on the fragment
+      if (!obj.title)
+        obj.title = $fragment.attr('title') || $fragment.data('title')
+    }
+
+  } else if (!fullDocument) {
+    obj.contents = $body
+  }
+
+  // Clean up any <title> tags
+  if (obj.contents) {
+    // Remove any parent title elements
+    obj.contents = obj.contents.not(function() { return $(this).is('title') })
+
+    // Then scrub any titles from their descendants
+    obj.contents.find('title').remove()
+
+    // Gather all script[src] elements
+    obj.scripts = findAll(obj.contents, 'script[src]').remove()
+    obj.contents = obj.contents.not(obj.scripts)
+  }
+
+  // Trim any whitespace off the title
+  if (obj.title) obj.title = $.trim(obj.title)
+
+  return obj
+}
+
+// Load an execute scripts using standard script request.
+//
+// Avoids jQuery's traditional $.getScript which does a XHR request and
+// globalEval.
+//
+// scripts - jQuery object of script Elements
+//
+// Returns nothing.
+function executeScriptTags(scripts) {
+  if (!scripts) return
+
+  var existingScripts = $('script[src]')
+
+  scripts.each(function() {
+    var src = this.src
+    var matchedScripts = existingScripts.filter(function() {
+      return this.src === src
+    })
+    if (matchedScripts.length) return
+
+    var script = document.createElement('script')
+    var type = $(this).attr('type')
+    if (type) script.type = type
+    script.src = $(this).attr('src')
+    document.head.appendChild(script)
+  })
+}
+
+// Internal: History DOM caching class.
+var cacheMapping      = {}
+var cacheForwardStack = []
+var cacheBackStack    = []
+
+// Push previous state id and container contents into the history
+// cache. Should be called in conjunction with `pushState` to save the
+// previous container contents.
+//
+// id    - State ID Number
+// value - DOM Element to cache
+//
+// Returns nothing.
+function cachePush(id, value) {
+  cacheMapping[id] = value
+  cacheBackStack.push(id)
+
+  // Remove all entries in forward history stack after pushing a new page.
+  trimCacheStack(cacheForwardStack, 0)
+
+  // Trim back history stack to max cache length.
+  trimCacheStack(cacheBackStack, pjax.defaults.maxCacheLength)
+}
+
+// Shifts cache from directional history cache. Should be
+// called on `popstate` with the previous state id and container
+// contents.
+//
+// direction - "forward" or "back" String
+// id        - State ID Number
+// value     - DOM Element to cache
+//
+// Returns nothing.
+function cachePop(direction, id, value) {
+  var pushStack, popStack
+  cacheMapping[id] = value
+
+  if (direction === 'forward') {
+    pushStack = cacheBackStack
+    popStack  = cacheForwardStack
+  } else {
+    pushStack = cacheForwardStack
+    popStack  = cacheBackStack
+  }
+
+  pushStack.push(id)
+  id = popStack.pop()
+  if (id) delete cacheMapping[id]
+
+  // Trim whichever stack we just pushed to to max cache length.
+  trimCacheStack(pushStack, pjax.defaults.maxCacheLength)
+}
+
+// Trim a cache stack (either cacheBackStack or cacheForwardStack) to be no
+// longer than the specified length, deleting cached DOM elements as necessary.
+//
+// stack  - Array of state IDs
+// length - Maximum length to trim to
+//
+// Returns nothing.
+function trimCacheStack(stack, length) {
+  while (stack.length > length)
+    delete cacheMapping[stack.shift()]
+}
+
+// Public: Find version identifier for the initial page load.
+//
+// Returns String version or undefined.
+function findVersion() {
+  return $('meta').filter(function() {
+    var name = $(this).attr('http-equiv')
+    return name && name.toUpperCase() === 'X-PJAX-VERSION'
+  }).attr('content')
+}
+
+// Install pjax functions on $.pjax to enable pushState behavior.
+//
+// Does nothing if already enabled.
+//
+// Examples
+//
+//     $.pjax.enable()
+//
+// Returns nothing.
+function enable() {
+  $.fn.pjax = fnPjax
+  $.pjax = pjax
+  $.pjax.enable = $.noop
+  $.pjax.disable = disable
+  $.pjax.click = handleClick
+  $.pjax.submit = handleSubmit
+  $.pjax.reload = pjaxReload
+  $.pjax.defaults = {
+    timeout: 650,
+    push: true,
+    replace: false,
+    type: 'GET',
+    dataType: 'html',
+    scrollTo: 0,
+    maxCacheLength: 20,
+    version: findVersion
+  }
+  $(window).on('popstate.pjax', onPjaxPopstate)
+}
+
+// Disable pushState behavior.
+//
+// This is the case when a browser doesn't support pushState. It is
+// sometimes useful to disable pushState for debugging on a modern
+// browser.
+//
+// Examples
+//
+//     $.pjax.disable()
+//
+// Returns nothing.
+function disable() {
+  $.fn.pjax = function() { return this }
+  $.pjax = fallbackPjax
+  $.pjax.enable = enable
+  $.pjax.disable = $.noop
+  $.pjax.click = $.noop
+  $.pjax.submit = $.noop
+  $.pjax.reload = function() { window.location.reload() }
+
+  $(window).off('popstate.pjax', onPjaxPopstate)
+}
+
+
+// Add the state property to jQuery's event object so we can use it in
+// $(window).bind('popstate')
+if ($.event.props && $.inArray('state', $.event.props) < 0) {
+  $.event.props.push('state')
+} else if (!('state' in $.Event.prototype)) {
+  $.event.addProp('state')
+}
+
+// Is pjax supported by this browser?
+$.support.pjax =
+  window.history && window.history.pushState && window.history.replaceState &&
+  // pushState isn't reliable on iOS until 5.
+  !navigator.userAgent.match(/((iPod|iPhone|iPad).+\bOS\s+[1-4]\D|WebApps\/.+CFNetwork)/)
+
+if ($.support.pjax) {
+  enable()
+} else {
+  disable()
+}
+
+})(jQuery)