retrofit2 interceptor that logs the raw JSON response from API. After that it clones it and returns a sane copy that other classes can consume.

LogJsonInterceptor.java

import android.util.Log;

import com.appandweb.prjtestdrivendev.BuildConfig;
import com.squareup.okhttp.Interceptor;
import com.squareup.okhttp.Request;
import com.squareup.okhttp.Response;
import com.squareup.okhttp.ResponseBody;

import java.io.IOException;

public class LogJsonInterceptor implements Interceptor {
    @Override
    public Response intercept(Interceptor.Chain chain) throws IOException {
        Request request = chain.request();

        Response response = chain.proceed(request);
        String rawJson = response.body().string();

        Log.d(BuildConfig.APPLICATION_ID, String.format("raw JSON response is: %s", rawJson));

        // Re-create the response before returning it because body can be read only once
        return response.newBuilder()
                .body(ResponseBody.create(response.body().contentType(), rawJson)).build();
    }
}

没必要制造额外的一个请求。

/**
 * HttpInterceptor
 */
public class HttpInterceptor implements Interceptor {
    private static final Charset UTF8 = Charset.forName("UTF-8");

    @Override
    public Response intercept(Chain chain) throws IOException {
        Request request = chain.request();
        Logger.d(BuildConfig.APPLICATION_ID, "call ==> " + request.url());
        Response response = chain.proceed(request);
        ResponseBody responseBody = response.body();
        BufferedSource source = responseBody.source();
        source.request(Long.MAX_VALUE); // Buffer the entire body.
        Buffer buffer = source.buffer();
        Logger.d(BuildConfig.APPLICATION_ID, "ret ==> " + buffer.clone().readString(UTF8).toString());
        return response;
    }
}

可以参考HttpLoggingInterceptor源码

Hi @aliang228, regarding your code proposal. Couldn't this Long.MAX_VALUE be improved? according to .request() documentation:

  /**
   * Returns true when the buffer contains at least {@code byteCount} bytes, expanding it as
   * necessary. Returns false if the source is exhausted before the requested bytes can be read.
   */
  boolean request(long byteCount) throws IOException;

This means that you would be requesting a buffer of 9.223.372.036.854.775.807 bytes on every HTTP request intercepted by this HttpInterceptor. Do you find this reasonable? or could it be improved?

Thanks for the proposal!

thank you