使用httpclient 调用selenium webdriver

结合上次研究的selenium webdriver potocol ，自己写http request调用remote driver代替selenium API

selenium web driver Json protocol 相关请看 /article/4970016.html

我这里使用的是Gson 和 httpclient

首先，起一个remote sever

java -Dwebdriver.ie.driver="IEDriverServer.exe"   -Dwebdriver.chrome.driver="chromedriver.exe"  -jar selenium-server-standalone-2.48.0.jar

这里要用到httpclient的Post 和delete method

创建一个httpclient对象

HttpClient httpClient = HttpClients.createDefault();

创建一个post请求

JsonObject setCapability = new JsonObject();
setCapability.addProperty("browserName","firefox");
JsonObject capability = new JsonObject();
capability.add("desiredCapabilities",setCapability);
HttpPost httpPost = new HttpPost(base);

创建一个delete 请求

url = base + sessionId ;
HttpDelete httpDelete = new HttpDelete(url);

从respose 中获取session ID

HttpResponse response = httpClient.execute(httpPost);

try {
HttpEntity entity = response.getEntity();
if (entity != null) {
System.out.println("Response content length: "
+ entity.getContentLength());

String resultEntity = EntityUtils.toString(entity);
System.out.println("Response content: " + resultEntity);
JsonObject result= new JsonParser().parse(resultEntity).getAsJsonObject();
JsonElement  sessionIdJson = result.get("sessionId");
if(!sessionIdJson.isJsonNull())
sessionId =sessionIdJson.getAsString();
JsonElement  valueJson = result.get("value");

if(!valueJson.isJsonNull())
{
JsonObject tm=valueJson.getAsJsonObject();
JsonElement elementIdJson = tm.get("ELEMENT");
if(elementIdJson!=null)
elementId=elementIdJson.getAsString();

}

}
} finally {
((Closeable) response).close();
}

　　

全部代码如下：

import java.io.Closeable;
import java.io.IOException;
import java.io.UnsupportedEncodingException;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpDelete;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.message.BasicHeader;
import org.apache.http.protocol.HTTP;
import org.apache.http.util.EntityUtils;

import com.google.gson.JsonElement;
import com.google.gson.JsonObject;
import com.google.gson.JsonParser;

public class webDriverJson {
private static String base = "http://127.0.0.1:4444/wd/hub/session/";
private static String elementId;
static String sessionId = "";

public static void main(String[] args) throws Exception, IOException {

HttpClient httpClient = HttpClients.createDefault();

JsonObject setCapability = new JsonObject();
setCapability.addProperty("browserName","firefox");
JsonObject capability = new JsonObject();
capability.add("desiredCapabilities",setCapability);
HttpPost httpPost = new HttpPost(base);
//create session
postExecutor(httpClient, httpPost, capability);

String url = base + sessionId + "/url";
httpPost = new HttpPost(url);

JsonObject getUrl = new JsonObject();
getUrl.addProperty("url", "http://www.baidu.com");

postExecutor(httpClient, httpPost, getUrl);

//find input box
url = base + sessionId + "/element";
httpPost = new HttpPost(url);
JsonObject findElement = new JsonObject();
findElement.addProperty("using", "id");
findElement.addProperty("value", "kw");
postExecutor(httpClient, httpPost, findElement);

System.out.println(elementId);

url = base + sessionId + "/element/"+elementId+"/value";
httpPost = new HttpPost(url);
JsonObject typeElement = new JsonObject();

String json = "{\"value\":[\"webdriver\"]}";
JsonParser jp = new JsonParser();
typeElement = (JsonObject) jp.parse(json);

postExecutor(httpClient, httpPost, typeElement);

//find search button

url = base + sessionId + "/element";
httpPost = new HttpPost(url);
JsonObject findSearchButton = new JsonObject();
findSearchButton.addProperty("using", "id");
findSearchButton.addProperty("value", "su");
postExecutor(httpClient, httpPost, findSearchButton);
System.out.println(elementId);

url = base + sessionId + "/element/"+elementId+"/click";
httpPost = new HttpPost(url);
postExecutor(httpClient, httpPost,null);

//delete session
url = base + sessionId ;
HttpDelete httpDelete = new HttpDelete(url);

deleteExecutor(httpClient, httpDelete);

}

/**
* @author Young
* @param httpClient
* @param httpPost
* @param jo
* @throws UnsupportedEncodingException
* @throws IOException
* @throws ClientProtocolException
*/
public static void postExecutor(HttpClient httpClient, HttpPost httpPost,
JsonObject jo) throws UnsupportedEncodingException, IOException,
ClientProtocolException {
if(jo!=null)
{
StringEntity input = new StringEntity(jo.toString());
input.setContentEncoding("UTF-8");
input.setContentEncoding(new BasicHeader(HTTP.CONTENT_TYPE,
"application/json"));
httpPost.setEntity(input);
}

HttpResponse response = httpClient.execute(httpPost);

try {
HttpEntity entity = response.getEntity();
if (entity != null) {
System.out.println("Response content length: "
+ entity.getContentLength());

String resultEntity = EntityUtils.toString(entity);
System.out.println("Response content: " + resultEntity);
JsonObject result= new JsonParser().parse(resultEntity).getAsJsonObject();
JsonElement  sessionIdJson = result.get("sessionId");
if(!sessionIdJson.isJsonNull())
sessionId =sessionIdJson.getAsString();
JsonElement  valueJson = result.get("value");

if(!valueJson.isJsonNull())
{
JsonObject tm=valueJson.getAsJsonObject();
JsonElement elementIdJson = tm.get("ELEMENT");
if(elementIdJson!=null)
elementId=elementIdJson.getAsString();

}

}
} finally {
((Closeable) response).close();
}}

/**
* @author Young
* @param httpClient
* @param delete
* @throws UnsupportedEncodingException
* @throws IOException
* @throws ClientProtocolException
*/
public static void deleteExecutor(HttpClient httpClient, HttpDelete delete) throws UnsupportedEncodingException, IOException,
ClientProtocolException {

HttpResponse response = httpClient.execute(delete);

try {
HttpEntity entity = response.getEntity();
if (entity != null) {
System.out.println("Response content length: "
+ entity.getContentLength());

String resultEntity = EntityUtils.toString(entity);
System.out.println("Response content: " + resultEntity);
JsonObject result= new JsonParser().parse(resultEntity).getAsJsonObject();
JsonElement  sessionIdJson = result.get("sessionId");
if(!sessionIdJson.isJsonNull())
sessionId =sessionIdJson.getAsString();
JsonElement  valueJson = result.get("value");

if(!valueJson.isJsonNull())
{
JsonObject tm=valueJson.getAsJsonObject();
JsonElement elementIdJson = tm.get("ELEMENT");
if(elementIdJson!=null)
elementId=elementIdJson.getAsString();

}

}
} finally {
((Closeable) response).close();
}
}

}

运行效果：



了解selenium 原理究竟有什么意义？

大多数人都会使用selenium去做自动化，但是不是每个人都了解selenium的原理，如果能掌握selenium原理

可以改造selenium API，使用webdriver protocol去做一些能够完善自动化测试框架的事情。、

比如，也许你在selenium自动化过程中会遇到get打开页面打不开，为了保证你脚本的健壮性，这时候你可以加入一段httprequest去获取

response的的关键值判断，如果不是2开头的可以设置refresh，再比如需要做一些准备性工作，比如环境配置也可以使用