okhttp（二）

一、总体架构

截图.png

二、源码分析
1.OkHttpClient client = new OkHttpClient（）； // 创建OkHttpClient对象
2.Request request = new Request.Builder() // 用Request.Builder()创建请求
.url(url)
.build();
3.Response response = client.newCall(request).execute(); // 把请求传入newCall方法中，然后执行，就能拿到你想要的返回值

1.1 OkHttpClient

public class OkHttpClient implements Cloneable, Call.Factory, WebSocket.Factory {
  public OkHttpClient() {
       this(new Builder());
  }
  OkHttpClient(Builder builder) {
    this.dispatcher = builder.dispatcher;         //  分发器
    this.proxy = builder.proxy;                   //  
    this.protocols = builder.protocols;           //  池子
    this.connectionSpecs = builder.connectionSpecs;                //  
    this.interceptors = Util.immutableList(builder.interceptors);                // 拦截器 （属于应用层拦截器）
    this.networkInterceptors = Util.immutableList(builder.networkInterceptors);  // 网络拦截器 
    this.eventListenerFactory = builder.eventListenerFactory;                //  
    this.proxySelector = builder.proxySelector;                //  
    this.cookieJar = builder.cookieJar;                //  
    this.cache = builder.cache;                //  
    this.internalCache = builder.internalCache;                //  
    this.socketFactory = builder.socketFactory;                //  

    boolean isTLS = false;
    ......

    this.hostnameVerifier = builder.hostnameVerifier;
    this.certificatePinner = builder.certificatePinner.withCertificateChainCleaner(
        certificateChainCleaner);
    this.proxyAuthenticator = builder.proxyAuthenticator;
    this.authenticator = builder.authenticator;
    this.connectionPool = builder.connectionPool;             // 连接池 
    this.dns = builder.dns;
    this.followSslRedirects = builder.followSslRedirects;
    this.followRedirects = builder.followRedirects;
    this.retryOnConnectionFailure = builder.retryOnConnectionFailure;
    this.connectTimeout = builder.connectTimeout;             //  连接时间 
    this.readTimeout = builder.readTimeout;                   //  读取时间
    this.writeTimeout = builder.writeTimeout;                 //  写入时间
    this.pingInterval = builder.pingInterval;
  }
}