pocketcommunityclient/app/src/main/java/com/community/pocket/util/HttpJSONResponse.java

package com.community.pocket.util;

import android.util.Log;

import com.google.gson.Gson;
import com.google.gson.JsonSyntaxException;

import org.jetbrains.annotations.NotNull;

import java.io.IOException;

import okhttp3.Call;
import okhttp3.Callback;
import okhttp3.Response;
import okhttp3.ResponseBody;

/**
 * 解析HTTP响应体
 *
 * @param <T> 响应实体类型
 */
public class HttpJSONResponse<T extends com.community.pocket.ui.main.ui.share.Response> implements Callback {

    private Class<T> tClass;

    private HttpParse<T> httpParse;

    private static final String header = "Content-Type";

    public HttpJSONResponse(Class<T> tClass, HttpParse<T> httpParse) {
        this.tClass = tClass;
        this.httpParse = httpParse;
    }

    @Override
    public void onFailure(@NotNull Call call, @NotNull IOException e) {
        e.printStackTrace();
        Log.e(HttpJSONResponse.class.getName(), e.toString());
    }

    @Override
    public void onResponse(@NotNull Call call, @NotNull Response response) {
        String contentType = response.header(header);
        if (contentType != null && contentType.contains("json")) {
            ResponseBody body = response.body();
            if (body != null) {
                Gson gson = new Gson();
                try {
                    String message = body.string();
                    Log.i(HttpUtil.class.getName(), "响应数据:\n" + message);
                    T jsonObject = gson.fromJson(message, tClass);
                    if (jsonObject != null) {
                        httpParse.onParseOk(call, response, jsonObject);
                    } else {
                        onParseError(call, response, "无法把数据" + message + "解析为" + tClass + "类型");
                    }
                } catch (JsonSyntaxException | IOException e) {
                    onParseError(call, response, "解析异常" + e);
                }
            } else {
                onParseError(call, response, "响应体为null");
            }
        } else {
            onParseError(call, response, "接口不是响应json数据，非法响应头" + header + "=" + contentType);
        }
    }


    private void onParseError(@NotNull Call call, @NotNull Response response, String err) {
        Log.e(HttpJSONResponse.class.getName(), err);
        throw new RuntimeException(err);
    }

}