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", "","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
}
(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
Setting
User
Password
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
/// 1) ///
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。
//内连脚本
function test(){ alert("test");}
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
/// 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();
}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