Android的OkHttp包处理用户认证的代码实例分享
OkHttp提供了对用户认证的支持。当HTTP响应的状态代码是401时，OkHttp会从设置的Authenticator对象中获取到新的Request对象并再次尝试发出请求。Authenticator接口中的authenticate方法用来提供进行认证的Request对象，authenticateProxy方法用来提供对代理服务器进行认证的Request对象。
用户认证的示例：
OkHttpClientclient=newOkHttpClient();
client.setAuthenticator(newAuthenticator(){
publicRequestauthenticate(Proxyproxy,Responseresponse)throwsIOException{
Stringcredential=Credentials.basic("user","password");
returnresponse.request().newBuilder()
.header("Authorization",credential)
.build();
}
publicRequestauthenticateProxy(Proxyproxy,Responseresponse)
throwsIOException{
returnnull;
}
});
进阶
当需要实现一个Basicchallenge，使用Credentials.basic(username,password)来编码请求头。
privatefinalOkHttpClientclient=newOkHttpClient();
publicvoidrun()throwsException{
client.setAuthenticator(newAuthenticator(){
@OverridepublicRequestauthenticate(Proxyproxy,Responseresponse){
System.out.println("Authenticatingforresponse:"+response);
System.out.println("Challenges:"+response.challenges());
Stringcredential=Credentials.basic("jesse","password1");
returnresponse.request().newBuilder()
.header("Authorization",credential)
.build();
}
@OverridepublicRequestauthenticateProxy(Proxyproxy,Responseresponse){
returnnull;//Nullindicatesnoattempttoauthenticate.
}
});
Requestrequest=newRequest.Builder()
.url("http://publicobject.com/secrets/hellosecret.txt")
.build();
Responseresponse=client.newCall(request).execute();
if(!response.isSuccessful())thrownewIOException("Unexpectedcode"+response);
System.out.println(response.body().string());
}