一篇非常好的分析 Selenium 2 和 3 的原理： selenium3：你安装 geckodriver 了吗？

你的名字 2021-11-17 04:26 162阅读 0赞

转自：https://testerhome.com/topics/10248

**另一篇：Selenium WebDriver的工作原理**

https://blog.csdn.net/yoyocat915/article/details/80246744

需要注意的是，这一篇中提到“浏览器驱动中包含了一个HTTP Server，用来接收这些http请求 ”，那么根据上面的文章，好像应该不是一个 http server， 而是 WebDriver.xpi 插件

**又一篇：Webdriver实现原理**

https://blog.csdn.net/kellyruan/article/details/41647573

**再一篇：****[appium ,selenium ,webdriver 运行原理与机制][appium _selenium _webdriver]**

https://www.cnblogs.com/Ronaldo-HD/p/9848324.html

**下面这篇文章记录了 WebDriver 使用 JSON Wire Protocol 和 http server 交互的实质：**

https://www.jianshu.com/p/zcB9ai

**作者：myersguo  
链接：https://www.jianshu.com/p/zcB9ai  
来源：简书**

### WebDriver之JsonWireProtocol\#\#\# ###

**JsonWireProtocol说明**  
JsonWireProtocol(以下简称JWP)是通过使用webdriver与remote server进行通信的[web service 协议][web service]。通过http请求，完成和remote server的交互。

**交互过程**  
下面，我将列出一系列http请求，利用JSP和remote server进行通信，来进行浏览器操作。（注：书写格式为：GET URL 参数）

***1. 打开浏览器***  
即，创建一个新的browser session。  
POST [http://10.236.122.10:4444/wd/hub/session][http_10.236.122.10_4444_wd_hub_session]  
\{desiredCapabilities:\{browserName: 'chrome' \}\}  
结果返回：

\{  
"status": 0,  
"sessionId": "277e823a-8be2-48eb-9001-971cc1bff9c4",  
"state": null,  
"value": \{  
"platform": "XP",  
"acceptSslCerts": true,  
"javascriptEnabled": true,  
"browserName": "chrome",  
"chrome": \{  
"userDataDir": "C:\\Users\\GUOLIA~1\\AppData\\Local\\Temp\\scoped\_dir4600\_564"  
\},  
"rotatable": false,  
"locationContextEnabled": true,  
"webdriver.remote.sessionid": "277e823a-8be2-48eb-9001-971cc1bff9c4",  
"version": "41.0.2272.118",  
"takesHeapSnapshot": true,  
"cssSelectorsEnabled": true,  
"databaseEnabled": false,  
"handlesAlerts": true,  
"browserConnectionEnabled": false,  
"nativeEvents": true,  
"webStorageEnabled": true,  
"applicationCacheEnabled": false,  
"takesScreenshot": true  
\},  
"class": "org.openqa.selenium.remote.Response",  
"hCode": 28232762  
\}

记住上面返回的  
"sessionId": "277e823a-8be2-48eb-9001-971cc1bff9c4"  
***2. 打开一个url***  
比如，打开百度首页：

POST  
[http://10.236.122.10:4444/wd/hub/session/277e823a-8be2-48eb-9001-971cc1bff9c4/url][http_10.236.122.10_4444_wd_hub_session_277e823a-8be2-48eb-9001-971cc1bff9c4_url]  
\{url :'[http://www.baidu.com'][http_www.baidu.com] \}

***3. 查找输入框***

POST  
[http://10.236.122.10:4444/wd/hub/session/277e823a-8be2-48eb-9001-971cc1bff9c4/elements][http_10.236.122.10_4444_wd_hub_session_277e823a-8be2-48eb-9001-971cc1bff9c4_elements]  
\{using:'css selector',value:'\#kw'\}

返回：  
\{  
"status": 0,  
"sessionId": "b6d34570-8300-4507-b60c-ab7cd1fe6536",  
"state": "success",  
"value": \[  
\{  
"ELEMENT": "0"  
\}  
\],  
"class": "org.openqa.selenium.remote.Response",  
"hCode": 30641031  
\}  
记住返回值， 下面要用。  
"ELEMENT": "0"  
***4. 输入元素***

POST  
[http://10.236.122.10:4444/wd/hub/session/277e823a-8be2-48eb-9001-971cc1bff9c4/element/0/value][http_10.236.122.10_4444_wd_hub_session_277e823a-8be2-48eb-9001-971cc1bff9c4_element_0_value]  
\{value:\[hello,world\]\}

\*\*\* 5. 查找OK按钮\*\*\*  
[http://10.236.122.10:4444/wd/hub/session/277e823a-8be2-48eb-9001-971cc1bff9c4/elements][http_10.236.122.10_4444_wd_hub_session_277e823a-8be2-48eb-9001-971cc1bff9c4_elements]  
\{using:'css selector',value:'\#su'\}  
***4. 点击OK***  
[http://10.236.122.10:4444/wd/hub/session/277e823a-8be2-48eb-9001-971cc1bff9c4/element/1/click][http_10.236.122.10_4444_wd_hub_session_277e823a-8be2-48eb-9001-971cc1bff9c4_element_1_click]

返回点击成功了：  
\{  
"status": 0,  
"sessionId": "277e823a-8be2-48eb-9001-971cc1bff9c4",  
"state": "success",  
"value": null,  
"class": "org.openqa.selenium.remote.Response",  
"hCode": 11068806  
\}

转载于:https://www.cnblogs.com/backpacker/p/10935178.html

[appium _selenium _webdriver]: https://www.cnblogs.com/Ronaldo-HD/p/9848324.html
[web service]: https://link.jianshu.com/?t=https://code.google.com/p/selenium/wiki/JsonWireProtocol
[http_10.236.122.10_4444_wd_hub_session]: https://link.jianshu.com/?t=http://10.236.122.10:4444/wd/hub/session
[http_10.236.122.10_4444_wd_hub_session_277e823a-8be2-48eb-9001-971cc1bff9c4_url]: https://link.jianshu.com/?t=http://10.236.122.10:4444/wd/hub/session/277e823a-8be2-48eb-9001-971cc1bff9c4/url
[http_www.baidu.com]: https://link.jianshu.com/?t=http://www.baidu.com%27
[http_10.236.122.10_4444_wd_hub_session_277e823a-8be2-48eb-9001-971cc1bff9c4_elements]: https://link.jianshu.com/?t=http://10.236.122.10:4444/wd/hub/session/277e823a-8be2-48eb-9001-971cc1bff9c4/elements
[http_10.236.122.10_4444_wd_hub_session_277e823a-8be2-48eb-9001-971cc1bff9c4_element_0_value]: https://link.jianshu.com/?t=http://10.236.122.10:4444/wd/hub/session/277e823a-8be2-48eb-9001-971cc1bff9c4/element/0/value
[http_10.236.122.10_4444_wd_hub_session_277e823a-8be2-48eb-9001-971cc1bff9c4_element_1_click]: https://link.jianshu.com/?t=http://10.236.122.10:4444/wd/hub/session/277e823a-8be2-48eb-9001-971cc1bff9c4/element/1/click