Question

由于我需要使用Retrofit 2，我需要记录请求背后发生的事情，因此解决方案是添加请求拦截器。我添加了一个来自okhttp wiki 的拦截器，我还根据需要添加了一些其他更改，并在构建阶段将其设置为okhttp客户端，但它没有按照我的预期工作。当我将自定义拦截器设置为okhttp客户端时，GsonConverter无法将响应json解析为java对象。

以下是拦截器

的代码

public class LoggingInterceptor implements Interceptor {

private final static String TAG = "RI";

private HashMap<String, String> headersMap = null;
public LoggingInterceptor(HashMap<String, String> headers) {
    this.headersMap = headers;
}

@Override
public Response intercept(Chain chain) throws IOException {

    Request request = chain.request();
    Request.Builder reqBuilder = request.newBuilder();
    Log.e(TAG, "Headers on the map -> " + headersMap.size());
    for (String header : headersMap.keySet()) {
        reqBuilder.addHeader(header, headersMap.get(header));
    }

    request = reqBuilder.build();
    long timeRequest = System.nanoTime();
    Log.d(TAG, String.format(Locale.getDefault(), "Sending %s with %s", request.url(), request.headers()));

    Response response = chain.proceed(request);

    Log.d(TAG, "<<<=========================================>>>");
    long timeResponse = System.nanoTime();
    Log.d(TAG, String.format(Locale.getDefault(), "Receiving %s in %s%n%s", response.request().url(), ((timeResponse - timeRequest)/1e6d), response.headers()));
    Log.d(TAG, "Data: " + response.body().string());
    Log.d(TAG, "Code: " + response.code());

    return response;
}

}

以下是我如何将它添加到Okhttp客户端

private OkHttpClient createHttpClient(){
    if(client == null){

        String strUserAgent = "tm-vc=" + BuildConfig.VERSION_CODE + "-devid=" + (getDeviceID().isEmpty() ? "0" : getDeviceID());
        HashMap<String, String> headers = new HashMap<>();
        headers.put(HEADER_ACCEPT,      "application/json; charset=utf-8");
        headers.put(HEADER_USER_AGENT,  strUserAgent);
        String cookie =  getSessionCookie();
        if(cookie != null && !cookie.isEmpty())
            headers.put(HEADER_COOKIE,  cookie);

        OkHttpClient.Builder builder = new OkHttpClient.Builder();
        builder.addInterceptor(new LoggingInterceptor(headers));
        builder.retryOnConnectionFailure(true);
        client = builder.build();
    }
    return client;
}

为了测试我所说的，我只需要评论这一行builder.addInterceptor(new LoggingInterceptor(headers));，如果你对该行进行评论，则会调用onResponse的改进并成功（工作，json被解析），如果不是onFailure则被调用。

那么我在拦截器实现上缺少什么？

问题本身是什么？ 如何使用拦截器向请求添加标题？

是的，我可以使用注释，但标题的值将是静态的。

注意：我正在使用完全更新的Retrofit 2.

Answer 1

您可以将 HttpLoggingInterceptor 与 Retrofit 2 一起使用，如下所示

1）Api客户

// imports
import okhttp3.OkHttpClient;
import okhttp3.logging.HttpLoggingInterceptor;
import retrofit2.Retrofit;
import retrofit2.converter.gson.GsonConverterFactory;

---

// Method to create instance of Service
public ApiService getService() {

    // Interceptor to Log the Request
    HttpLoggingInterceptor interceptor = new HttpLoggingInterceptor();
    // Level.BODY prints Urls, Params and Response
    interceptor.setLevel(HttpLoggingInterceptor.Level.BODY);

    // Create the Client
    OkHttpClient client = new OkHttpClient.Builder().addInterceptor(interceptor).build();

    // Initialize retrofit instance
    Retrofit retrofit = new Retrofit.Builder()
            .baseUrl(BASE_URL)
            .client(client)
            .addConverterFactory(GsonConverterFactory.create())
            .build();

    // Creates the instance of Web Service Representation
    return retrofit.create(ApiService.class);
}

2）Gradle依赖

// Retrofit 2 dependency
compile 'com.squareup.retrofit2:retrofit:2.1.0'
// GSON for Parsing into POJOs
compile 'com.squareup.retrofit2:converter-gson:2.0.2'
// Logging Interceptor to Log the  Request
compile 'com.squareup.okhttp3:logging-interceptor:3.4.1'
// OK HTTP dependency (for Compatibility)
compile 'com.squareup.okhttp3:okhttp:3.4.1'

3）同样，您可以将自己的自定义（例如，标题）添加到Retrofit

在改造2上向拦截器添加标头

1 个答案: