Android POST 使用 Retrofit 调用获取服务器 500 错误

Question

这似乎是一个非常简单的问题，但我想不通。我调用的 API 在 Postman 中运行良好，并构成应用程序的 iOS 版本。只是 Android 让我感到不适。咖啡可能不够。我正在使用 Android Studio 进行最新更新。

API 接受长 URL 作为 JSON 主体，returns 接受短 URL 作为字符串。

错误截图：

Android Error Screenshot

POST 调用：

private void getShortURL() {
    //Get full url
    final String fullURL = Constants.SHARE_BASE_URI + urlParameters;

    //Convert URL to JSON formatted data
    Map<String,String> data = new HashMap<String,String>();
    data.put("URL",fullURL);
    String jsonData = new GsonBuilder().create().toJson(data,Map.class);

    //Call API and pass in JSON to get Short URL
    Call<ResponseBody> getDynamicLinkCall = RetrofitAdapter.getRetroInterface(Constants.BASE_URI).getDynamicLink_String(Constants.getTimestamp(),Constants.APPLICATION,"application/json", jsonData);

    getDynamicLinkCall.enqueue(new Callback<ResponseBody>() {
        @Override
        public void onResponse(Call<ResponseBody> call, Response<ResponseBody> response) {
            if (response == null ||  response.code() != Constants.SUCCESS) {
                //Share Short URL
                share(response.body().toString());
            }
            else
            {
                //If Short URl Failed share long URL
                share(fullURL);
            }
        }

        @Override
        public void onFailure(Call<ResponseBody> call, Throwable t) {
            //If Short URl Failed share long URL
            share(fullURL);
        }
    });
}

RetrofitInterface.java

@POST("URLShortner")
Call<ResponseBody> getDynamicLink_String(@Header("TimeStamp") String timestamp, @Header("Application") String application, @Header("Content-Type") String contentType, @Body String jsonData);

邮递员截图：

Screenshot from Postman showing Body settings

改造适配器代码：

package com.company.appname.util;
import android.content.Context;
import com.company.appname.Constants;
import java.net.CookieHandler;
import java.net.CookieManager;
import java.net.CookiePolicy;
import java.util.concurrent.TimeUnit;
import okhttp3.CookieJar;
import okhttp3.JavaNetCookieJar;
import okhttp3.OkHttpClient;
import retrofit2.Retrofit;
import retrofit2.converter.jackson.JacksonConverterFactory;

public class RetrofitAdapter {
    public static OkHttpClient okHttpClient;
    public static Context context;

public static RetrofitInterface getRetroInterface(String endPoint){
    return createRestAdapter(endPoint).create(RetrofitInterface.class);
}

public static Retrofit createRestAdapter(String endPoint){
    boolean isMobileAPI = false;

    //Check if the endpoint is the mobile api
    if(endPoint.equalsIgnoreCase(Constants.MOBILE_SERVICE_BASE_URI)){
        isMobileAPI = true;
    }

    //Create a rest adapter
    return  new Retrofit.Builder()
            .client(createOkClient(isMobileAPI))
            .baseUrl(endPoint)
            .addConverterFactory(JacksonConverterFactory.create())
            .build();
}

public static OkHttpClient createOkClient(boolean isMobileAPI){

    NextModel next = NextModel.getInstance();

    if(next.okClient == null || !isMobileAPI) {
        //Create ok http Client
        OkHttpClient.Builder httpClient = new OkHttpClient.Builder();
        //Set timeouts
        httpClient.readTimeout(Constants.TIMEOUT, TimeUnit.MILLISECONDS);
        httpClient.connectTimeout(Constants.TIMEOUT, TimeUnit.MILLISECONDS);

        CookieJar cookieJar = new PersistentCookieJar(new SetCookieCache(), new SharedPrefsCookiePersistor(context));

        //Add cookieJar to Http Client
        httpClient.cookieJar(cookieJar);

        //Create OkHttpClient
        okHttpClient = httpClient.build();

        return okHttpClient;
    }else{
        //Return already created okclient
        return next.okClient;
    }
}


public static OkHttpClient getOkClient() {
    return okHttpClient;
}

}

我错过了什么？

提前致谢！

Answer 1

好的，我们发现了问题。我们缺少以下代码行：

RequestBody body = RequestBody.create(okhttp3.MediaType.parse("application/json; charset=utf-8"),jsonObject.toString());

此代码在 POST 调用之前进入，而不是 POSTing jsonData，我们 post body 修复了它。希望 Android Studio 给出了某种错误来提示这一点。

完整方法：

private void getShortURL() {
    //Get full url
    final String fullURL = Constants.SHARE_BASE_URI + urlParams;

    //Convert URL to JSON formatted data
    Map<String,String> data = new HashMap<String,String>();
    data.put("LINK",fullURL);
    String jsonData = new GsonBuilder().create().toJson(data,Map.class);

    RequestBody body = RequestBody.create(okhttp3.MediaType.parse("application/json; charset=utf-8"), jsonData);

    //Call API and pass in JSON to get Short URL
    Call<String> getDynamicLinkCall = RetrofitAdapter.getRetroInterface(Constants.BASE_URI).getDynamicLink_String(Constants.getTimestamp(),Constants.APPLICATION,"application/json", body);

    getDynamicLinkCall.enqueue(new Callback<String>() {
        @Override
        public void onResponse(Call<String> call, Response<String> response) {
            if (response == null ||  response.code() != Constants.SUCCESS) {
                //Share Short URL
                share(response.body().toString());
            }
            else
            {
                //If Short URl Failed share long URL
                share(fullURL);
            }
        }

        @Override
        public void onFailure(Call<String> call, Throwable t) {
            //If Short URl Failed share long URL
            share(fullURL);
        }
    });
}

RetrofitINterface.java:

@POST("URLShortner")
Call<String> getDynamicLink_String(@Header("TimeStamp") String timestamp, @Header("Application") String application, @Header("Content-Type") String contentType, @Body RequestBody jsonData);

谢谢大家！

Android POST 使用 Retrofit 调用获取服务器 500 错误

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