> 之前我已经研究到让业务测试通过不同方式来获取我们工具需要的har文件，现在我们拿到了业务测试提供的har文件，我们首先要解析这些文件里存放的信息，特别是`entries`字段里的信息,在万能的`github`上果然搜出来一个工具包
## 地址
[har](https://github.com/DoctorQ/har)
因为maven库里还没有这个jar包提供下载，你需要将源码下载到本地，打包后上传到自己公司的私有库里，供其他开发者下载
## 源码
主要的类为`HarUtils.java`,还有命令行下执行需要的2个类(`HarCli.java`,`ViewHar.java`),这两个类的主要作用请看我之前的文章[Java命令行程序构建工具-airline ](http://blog.csdn.net/itfootball/article/details/50541960),最后剩下来的就是model包中的实体类了，一一对应了`har`文件中的信息实体。
### HarUtils.java
~~~
/**
*
* har - HAR file reader, writer and viewer
* Copyright (c) 2014, Sandeep Gupta
*
* http://sangupta.com/projects/har
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
package com.sangupta.har;
import java.io.File;
import java.io.IOException;
import java.io.Reader;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import org.apache.commons.io.FileUtils;
import com.google.gson.JsonElement;
import com.google.gson.JsonSyntaxException;
import com.sangupta.har.model.Har;
import com.sangupta.har.model.HarEntry;
import com.sangupta.har.model.HarPage;
import com.sangupta.jerry.util.AssertUtils;
import com.sangupta.jerry.util.CheckUtils;
import com.sangupta.jerry.util.GsonUtils;
/**
* Utility class for working with HAR files.
*
* @author sangupta
*
*/
public class HarUtils {
/**
* Read the HAR file and create an {@link Har} model instance from the same.
*
* @param file
* the file to be read
*
* @return the {@link Har} instance
*
* @throws JsonSyntaxException
* if the JSON is not well formed
*
* @throws IOException
* if reading the file fails
*
* @throws IllegalArgumentException
* if the file does not exist, is a directory or is not a valid
* file
*/
public static Har read(File file) throws JsonSyntaxException, IOException {
CheckUtils.checkFileExists(file);
return GsonUtils.getGson().fromJson(FileUtils.readFileToString(file), Har.class);
}
public static Har read(String harJson) throws JsonSyntaxException, IOException {
if(AssertUtils.isEmpty(harJson)) {
throw new IllegalArgumentException("HAR Json cannot be null/empty");
}
return GsonUtils.getGson().fromJson(harJson, Har.class);
}
public static Har read(Reader harReader) throws JsonSyntaxException, IOException {
if(harReader == null) {
throw new IllegalArgumentException("HAR reader cannot be null");
}
return GsonUtils.getGson().fromJson(harReader, Har.class);
}
public static Har read(JsonElement jsonElement) throws JsonSyntaxException, IOException {
if(jsonElement == null) {
throw new IllegalArgumentException("HAR JsonElement cannot be null");
}
return GsonUtils.getGson().fromJson(jsonElement, Har.class);
}
/**
* Connect references between page and entries so that they can be obtained as needed.
*
* @param har
*/
public static void connectReferences(Har har) {
if(har == null) {
throw new IllegalArgumentException("HAR object cannot be null");
}
if(har.log == null || AssertUtils.isEmpty(har.log.pages)) {
// nothing to do
return;
}
if(AssertUtils.isEmpty(har.log.entries)) {
// no har entry - initialize empty list
for(HarPage page : har.log.pages) {
page.entries = new ArrayList<HarEntry>();
}
return;
}
for(HarPage page : har.log.pages) {
String pageID = page.id;
List<HarEntry> entries = new ArrayList<HarEntry>();
for(HarEntry entry : har.log.entries) {
if(pageID.equals(entry.pageref)) {
entries.add(entry);
}
}
// sort these based on start date
Collections.sort(entries);
// set the parent reference
page.entries = entries;
}
}
}
~~~
提供了如下几个方法获得`Har`对象:
| Method | 解释 |
|-----|-----|
| read(File) | 以har文件为参数，生成har对象 |
| read(JsonElement） | 以JsonElement对象为参数 |
| read(Reader) | 从字节流中获得har对象 |
| read(String） | 从字符串中获取har对象 |
| connectReferences(Har har) | 将har文件中pages和enties字段中的page信息关联起来 |
## 实例
~~~
public class HarParserTest {
@Test
public void parserFile() throws Exception {
File file = new File("/Users/wuxian/Desktop/interface/www.baidu.com.har");
Har har = HarUtils.read(file);
System.out.println("HarParserTest.parserFile() : " + har.toString());
}
}
~~~
输出信息：
~~~
HarParserTest.parserFile() : Har [log=HarLog [version=1.2, creator=HarCreator [name=WebInspector, version=537.36, comment=null], browser=null, pages=[HarPage [startedDateTime=2016-01-18T08:50:23.913Z, id=page_2, title=http://www.baidu.com/baidu.html?from=noscript, pageTimings=HarPageTiming [onContentLoad=82.36399999987043, onLoad=97.73299999869778, comment=null], comment=null]], entries=[HarEntry [pageref=page_2, startedDateTime=2016-01-18T08:50:23.913Z, time=10.068999999930384, request=GET http://www.baidu.com/baidu.html?from=noscript HTTP/1.1, response=HTTP 200 (OK), cache=com.sangupta.har.model.HarCache@46b44bc2, timings=HarTiming [blocked=0.663999999233056, dns=-1.0, connect=-1.0, send=0.10800000018207301, wait=7.102999999915481, receive=2.1940000005997735, ssl=-1.0, comment=null], serverIPAddress=null, connection=31193, comment=null], HarEntry [pageref=page_2, startedDateTime=2016-01-18T08:50:23.971Z, time=9.560000000419677, request=GET http://www.baidu.com/img/bd_logo1.png HTTP/1.1, response=HTTP 200 (OK), cache=com.sangupta.har.model.HarCache@66d9d1d1, timings=HarTiming [blocked=1.37800000084098, dns=-1.0, connect=-1.0, send=0.09800000043469992, wait=6.0219999995752, receive=2.0619999995687976, ssl=-1.0, comment=null], serverIPAddress=null, connection=31193, comment=null], HarEntry [pageref=page_2, startedDateTime=2016-01-18T08:50:23.971Z, time=12.46499999979278, request=GET http://www.baidu.com/img/baidu_jgylogo3.gif HTTP/1.1, response=HTTP 200 (OK), cache=com.sangupta.har.model.HarCache@665e2517, timings=HarTiming [blocked=0.743999999031075, dns=2.062999999907335, connect=3.28100000115228, send=0.11999999878752998, wait=5.31500000033698, receive=0.9420000005775808, ssl=-1.0, comment=null], serverIPAddress=null, connection=32311, comment=null], HarEntry [pageref=page_2, startedDateTime=2016-01-18T08:50:23.972Z, time=15.82599999892409, request=GET http://www.baidu.com/img/gs.gif HTTP/1.1, response=HTTP 200 (OK), cache=com.sangupta.har.model.HarCache@2ed53d82, timings=HarTiming [blocked=0.84199999946577, dns=1.9300000003568099, connect=3.2869999995455204, send=0.08600000001024011, wait=7.40299999961276, receive=2.277999999932989, ssl=-1.0, comment=null], serverIPAddress=null, connection=32312, comment=null]], comment=null]]
~~~
## 总结
我们得到Har信息，可以做的就很多了，我们通过har文件，解析出来所有的url和参数，这样就可以得到一批接口信息。那么实际能做什么呢，静待后续。
