谷歌插件开发（实现CSDN快速登陆）
谷歌浏览器插件带来了很大的方便，于是就想着是不是也可以开发一个来用用。几经折腾下，开发了个CSDN快速 登陆的插件。下面简述一下开发的步骤。
1、开发工具：谷歌浏览器（我开发时用的是chrome 30.0.1599.101 ）、HTML/JS/CSS/JSON开发工具（UE、VS等，当然也可以用记事本）
2、开发过程
（1）新建清单文件manifest.json：该名字不可以改。下面是代码
{
"manifest_version": 2,
"background": {
"page": "main.html"//后台运行页，page和scrptis只能选择一个
},
"browser_action":{
"default_icon":"assets/images/Icon.png",//插件默认图标
"default_title":"__MSG_manifest_iconTitle__",//插件标题
"default_popup":"popup.html"//单击插件图标时弹出的页面
},
"default_locale":"en",//默认本地化语言
"description":"__MSG_manifest_appDescription__",//插件描述
"icons":{//显示的图标
"16":"assets/images/Icon.png",
"128":"assets/images/Icon.png"
},
"name":"__MSG_manifest_appName__",//插件名字
"options_page":"options.html",//插件选项页
"permissions":[ "proxy", "tabs", "<all_urls>","notifications"],//申请需要的权限
"version":"1.1.1",//插件版本
"minimum_chrome_version":"18.0.0"//浏览器最低版本
}
其中__MSG_manifest_iconTitle__、__MSG_manifest_appDescription__、__MSG_manifest_appName__是依据系统语言的本地化配置，比如在简体中文系统和英文系统时会本地化成相应的语言，见下图
(2)新建弹出页(popup.html)
写HTML和CSS代码，排布出如上图所示的界面
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<link rel="stylesheet" href="assets/styles/popup.css" type="text/css">
<script src="assets/libs/jquery-1.7.2.min.js" type="text/javascript"></script>
<script src="assets/scripts/Popup.js" type="text/javascript"></script>
</head>
<body>
<div id="set_config">
<div class="header title" data-i18n-content="popup_setting">Setting</div>
<div class="header light">
<table>
<tr>
<th>
<span data-i18n-content="popup_account_id">User</span>
</th>
<td>
<input type="text" id="setting_account_id" value="" />
</td>
</tr>
<tr>
<th>
<span data-i18n-content="popup_password">Password</span>
</th>
<td>
<input type="password" id="setting_password" value="" />
</td>
</tr>
</table>
</div>
<div class="header light">
<table class="control">
<tr>
<td>
<button class="button bold" id="setting_login" data-i18n-content="popup_setting_login">Save</button>
</td>
<td> </td>
<td>
<button class="button bold" id="setting_cancel" data-i18n-content="popup_setting_cancel">Cancel</button>
</td>
</tr>
</table>
</div>
</div>
</body>
</html>
注意：这里面也采用了本地化配置，data-i18n-content="popup_setting"一类的写法，就是进行本地化配置，不过需要通过i18n.js来配套实现。i18n表示的是国际化。人们常把I18N作为“国际化”的简称，其来源是英文单词 internationalization的首末字符i和n。18为中间的字符数。
这里面还用到了popup.js和jquery。jquery是JS库，网上可以下载到。popup.js代码如下
/// <reference path="Config.js"/>
/// <reference path="Settings.js"/>
/// <reference path="Notify.js"/>
var Popup = {};
Popup.CONTROL_IDS = {
SET_CANCEL: "setting_cancel",
SET_LOGIN: "setting_login",
SETTING_ACCOUNT_ID: "setting_account_id",
SETTING_PASSWORD: "setting_password"
};
$(document).ready(function () {
Popup.init();
$("#" + Popup.CONTROL_IDS.SET_LOGIN).click(Popup.setLogin);
$("#" + Popup.CONTROL_IDS.SET_CANCEL).click(Popup.setCancel);
});
Popup.init = function () {
Popup.extension = chrome.extension.getBackgroundPage();
Settings = Popup.extension.Settings;//Settings in Settings.js
Config = Popup.extension.Config;//Config in Config.js
Notify = Popup.extension.Notify;
I18n = Popup.extension.I18n;//I18n in I18n.js
I18n.process(document);
document.body.style.visibility = "visible";
Popup.initUI();
}
Popup.initUI = function () {
$("#" + Popup.CONTROL_IDS.SETTING_ACCOUNT_ID).attr("value", Settings.getValue(Config.KEYS.ACCOUNT_ID, ''));
$("#" + Popup.CONTROL_IDS.SETTING_PASSWORD).attr("value", Settings.getValue(Config.KEYS.PASSOWRD, ''));
}
Popup.openPage = function () {
Popup.closePopup();
chrome.tabs.create({//新建标签页
url: Config.URLS.LOGIN
});
}
Popup.openOptions = function () {
Popup.closePopup();
extension.openOptions();
}
Popup.closePopup = function () {
window.close();
}
Popup.setCancel = function () {
Popup.closePopup();
}
Popup.setLogin = function () {
Settings.setValue(Config.KEYS.ACCOUNT_ID, $("#" + Popup.CONTROL_IDS.SETTING_ACCOUNT_ID).val());
Settings.setValue(Config.KEYS.PASSOWRD, $("#" + Popup.CONTROL_IDS.SETTING_PASSWORD).val());
Notify.notifyText(Config.FILES.NOTIFY_IMAGE, '', 'OK');
Popup.openPage();
}
说明：
1) /// <reference path="Config.js"/>是VS中为了可以像类一样点出相应的字段和方法的引用方法。
2)$(document).ready是popup.html加载完成后进行相应的操作，比如初始化按钮的点击事件等。chrome是不可以在页面中直接写内连的JS的，那样有安全隐患。
<scritp type="text/javascript">
//内连脚本
function test(){ alert("test");}
</script>
如果非要进行内连，那必须将其转换成64码，然后连到src中(直接放到scrpit中的scr中不可以，需要放到iframe中。不知道具体是什么原因。)，如下面代码。
<iframe id="sandbox-frame" sandbox="allow-scripts" src="data:text/html;base64,JTNDc2NyaXB0JTIwdHlwZSUzRCUyMnRleHQvamF2YXNjcmlwdCUyMiUzRSUwQWFsZXJ0JTI4JTIyQUFBQSUyMiUyOSUzQiUwQSUzQy9zY3JpcHQlM0U="></iframe>
3）最重要的是Popup.init函数，这个函数将后台的js引用到前台(popup.js是从前台界面popup.html中引用的，所以为前台JS)，以便于更好的调用。
Popup.extension = chrome.extension.getBackgroundPage()先把后台引用到前台。
Config = Popup.extension.Config是从后台将Config引用到前台来，其中Config不是Config.js的脚本名字，而是Config.js中的var Config={}。其他的引用同理。
I18n.process(document)这是进行本地化配置。
(3)后台JS
后台JS需要放到main.html中，代码如下
<html>
<head>
<meta charset="UTF-8" />
<title></title>
<script src="assets/libs/jquery-1.7.2.min.js" type="text/javascript"></script>
<script src="assets/scripts/CSDN.js" type="text/javascript"></script>
<script src="assets/scripts/Settings.js" type="text/javascript"></script>
<script src="assets/scripts/Config.js" type="text/javascript"></script>
<script src="assets/scripts/I18n.js" type="text/javascript"></script>
<script src="assets/scripts/Notify.js" type="text/javascript"></script>
</head>
<body>
</body>
</html>
1)CSDN.js
/// <reference path="Config.js"/>
var CSDN = {};
chrome.tabs.onUpdated.addListener(function (tabId, changeInfo, tab) {//添加监听事件
var url = tab.url;
var config = null;
if (tab.status !== "complete") {//需要增加这一判断，不然会在页面加载和加载完成后分别触发
return;
}
CSDN.login(url);
});
CSDN.CONTROL_IDS = {
ACCOUNT_ID: "u",
PASSWORD: "p",
LOGIN: "aLogin",
LOGIN_IFRAME: "logfrm"
};
CSDN.isLoginUrl = function (url) {
if (url === Config.URLS.LOGIN) {
return true;
}
else {
return false;
}
}
CSDN.login = function (url) {
if (!CSDN.isLoginUrl(url)) {
return;
}
var accountID = Settings.getValue(Config.KEYS.ACCOUNT_ID, '');
var password = Settings.getValue(Config.KEYS.PASSOWRD, '');
var scripts = "";
if (accountID === undefined || accountID === null || accountID.replace(/(^\s*)|(\s*$)/g, "").length <= 0) {
return;
}
scripts += "var loginIFrame = document.getElementById('" + CSDN.CONTROL_IDS.LOGIN_IFRAME + "');"
+ " var loginDocument=loginIFrame.contentWindow.document;"
+ "loginDocument.getElementById('" + CSDN.CONTROL_IDS.ACCOUNT_ID + "').value='" + accountID + "';"
+ "loginDocument.getElementById('" + CSDN.CONTROL_IDS.PASSWORD + "').value='" + password + "';"
+ "loginDocument.getElementById('" + CSDN.CONTROL_IDS.LOGIN + "').click();"
chrome.tabs.executeScript(null, {//嵌入JS脚本到所打开的页面中。
code: scripts
});
}
2)Notify.js
从浏览器中发出桌面通知，代码如下
var Notify = {};
Notify.notifyText = function (iconUrl, title, content) {//这个要触发，必须在manifest.json中添加notifications，以申请桌面通知权限
var notification = window.webkitNotifications.createNotification(iconUrl, title, content);
notification.show();
}
3)其他JS代码如下
Config.js
var Config = {};
Config.KEYS = {
ACCOUNT_ID: "accountID",
PASSOWRD: "password"
};
Config.FILES = {
NOTIFY_IMAGE: "assets/images/Notify.png"
};
Config.URLS = {
LOGIN: "https://passport.csdn.net/account/login"
};
Setting.js
var Settings = {};
Settings.configCache = {};
Settings.setValue = function setValue(key, value) {
Settings.configCache[key] = value;
var config = {};
if (localStorage.config)
config = JSON.parse(localStorage.config);
config[key] = value;
localStorage.config = JSON.stringify(config);
return value;
};
Settings.getValue = function getValue(key, defaultValue) {
if (typeof Settings.configCache[key] != "undefined")
return Settings.configCache[key];
if (!localStorage.config)
return defaultValue;
var config = JSON.parse(localStorage.config);
if (typeof config[key] == "undefined")
return defaultValue;
Settings.configCache[key] = config[key];
return config[key];
};
Settings.keyExists = function keyExists(key) {
if (!localStorage.config)
return false;
var config = JSON.parse(localStorage.config);
return (config[key] != undefined);
};
Settings.setObject = function setObject(key, object) {
localStorage[key] = JSON.stringify(object);
return object;
};
Settings.getObject = function getObject(key) {
if (localStorage[key] == undefined)
return undefined;
return JSON.parse(localStorage[key]);
};
Settings.refreshCache = function refreshCache() {
Settings.configCache = {};
};
I18n.js
var I18n = {};
I18n.messages = null;
I18n.init = function init() {
I18n.messages = I18n.readMessages();
// I18n.readMessages(function(messages) {
// I18n.messages = messages;
// });
};
I18n.buildMessages = function buildMessages() {
var result = "\n";
$("*[data-i18n-content]").each(function (i, item) {
result += '"' + item.getAttribute("i18n-content") + '"' +
': { "message": "' + item.innerHTML.replace(/[ \r\n\t]+/g, " ") + '" },\n';
});
$("*[data-i18n-values]").each(function (i, item) {
$(item.getAttribute("i18n-values").split(";")).each(function (i, subItem) {
var subItemParts = subItem.split(":");
if (subItemParts.length == 2 && subItemParts[0].charAt(0) != ".") {
result += '"' + subItemParts[1] + '"' +
': { "message": "' + item.getAttribute(subItemParts[0]).replace(/[\r\n]/g, "\\n") + '" },\n';
}
});
});
return result;
};
I18n.readMessages = function readMessages(callback) {
var async = (callback != undefined);
var data = null;
var request = new XMLHttpRequest();
request.open("GET", chrome.extension.getURL("_locales/en/messages.json"), async);
request.onreadystatechange = function () {
if (this.readyState == XMLHttpRequest.DONE) {
data = this.responseText;
data = JSON.parse(data.replace(/[\r\n\t]+/g, " "));
if (async)
callback(data);
}
};
request.send("");
return data;
};
I18n.getMessage = function getMessage(messageName, substitution) {
var result = chrome.i18n.getMessage(messageName, substitution);
if (result == undefined || result.length == 0) {
var messageObject = I18n.messages[messageName];
if (messageObject != undefined) {
result = messageObject.message;
if (result != undefined)
result = result.replace("$1", substitution);
}
}
return result;
};
I18n.process = function process(node) {
return I18nTemplate.process(node);
};
I18n.init();
//-------------------------------------------------------
/**
* i18nTemplate: http://src.chromium.org/viewvc/chrome/trunk/src/chrome/browser/resources/i18n_template.js
*/
var I18nTemplate = (function () {
var handlers = {
/**
* This handler sets the textContent of the element.
*/
'data-i18n-content': function (element, attributeValue) {
element.innerHTML/*textContent*/ = I18n.getMessage(attributeValue);
},
/**
* This is used to set HTML attributes and DOM properties,. The syntax
* is: attributename:key; .domProperty:key; .nested.dom.property:key
*/
'data-i18n-values': function (element, attributeValue) {
var parts = attributeValue.replace(/\s/g, '').split(/;/);
for (var j = 0; j < parts.length; j++) {
var a = parts[j].match(/^([^:]+):(.+)$/);
if (a) {
var propName = a[1];
var propExpr = a[2];
var value = I18n.getMessage(propExpr);
if (propName.charAt(0) == '.') {
var path = propName.slice(1).split('.');
var object = element;
while (object && path.length > 1) {
object = object[path.shift()];
}
if (object) {
object[path] = value;
// In case we set innerHTML (ignoring others) we need to
// recursively check the content
if (path.toString() === 'innerHTML') {
process(element);
}
}
} else {
element.setAttribute(propName, value);
}
}
}
}
};
var attributeNames = [];
for (var key in handlers) {
if (handlers.hasOwnProperty(key)) {
attributeNames.push(key);
}
}
var selector = '[' + attributeNames.join('],[') + ']';
function process(node) {
var elements = node.querySelectorAll(selector);
for (var element, i = 0; element = elements[i]; i++) {
for (var j = 0; j < attributeNames.length; j++) {
var name = attributeNames[j];
var att = element.getAttribute(name);
if (att != null) {
handlers[name](element, att);
}
}
}
}
return {
process: process
};
})();
开发时参考了SwitchProxy的源码https://code.google.com/p/switchysharp/source/。
转载请注明出处http://blog.csdn.net/xxdddail/article/details/13504259
源码在此处下载http://download.csdn.net/detail/xxdddail/6469683