android - 使用基本 HTTP 身份验证 : "Cannot retry streamed HTTP body" 改造 POST 请求

Question

我正在使用 Retrofit 执行一个基本的 POST 请求，并且我正在为该请求提供一个基本的 @Body。

@POST("/rest/v1/auth/login")
LoginResponse login(@Body LoginRequest loginRequest);

当我为 Retrofit 构建接口(interface)时，我提供了我自己的自定义 OkHttpClient，我所做的只是添加我自己的自定义身份验证:

    @Provides
    @Singleton
    public Client providesClient() {
        OkHttpClient httpClient = new OkHttpClient();

        httpClient.setAuthenticator(new OkAuthenticator() {
            @Override
            public Credential authenticate(Proxy proxy, URL url, List<Challenge> challenges) throws IOException {
                return getCredential();
            }

            @Override
            public Credential authenticateProxy(Proxy proxy, URL url, List<Challenge> challenges) throws IOException {
                return getCredential();
            }
        });

        return new OkClient(httpClient);
    }

当我直接使用 OKHttp 发送请求以及其他使用改造的 GET 请求时，这非常有用，但是当我使用改造来执行 POST 请求时，我收到以下错误:

Caused by: java.net.HttpRetryException: Cannot retry streamed HTTP body
            at com.squareup.okhttp.internal.http.HttpURLConnectionImpl.getResponse(HttpURLConnectionImpl.java:324)
            at com.squareup.okhttp.internal.http.HttpURLConnectionImpl.getResponseCode(HttpURLConnectionImpl.java:508)
            at com.squareup.okhttp.internal.http.HttpsURLConnectionImpl.getResponseCode(HttpsURLConnectionImpl.java:136)
            at retrofit.client.UrlConnectionClient.readResponse(UrlConnectionClient.java:94)
            at retrofit.client.UrlConnectionClient.execute(UrlConnectionClient.java:49)
            at retrofit.RestAdapter$RestHandler.invokeRequest(RestAdapter.java:357)
            at retrofit.RestAdapter$RestHandler.invoke(RestAdapter.java:282)
            at $Proxy3.login(Native Method)
            at com.audax.paths.job.LoginJob.onRunInBackground(LoginJob.java:41)
            at com.audax.library.job.AXJob.onRun(AXJob.java:25)
            at com.path.android.jobqueue.BaseJob.safeRun(BaseJob.java:108)
            at com.path.android.jobqueue.JobHolder.safeRun(JobHolder.java:60)
            at com.path.android.jobqueue.executor.JobConsumerExecutor$JobConsumer.run(JobConsumerExecutor.java:172)
            at java.lang.Thread.run(Thread.java:841)

我玩过它。如果我删除身份验证，并指向不需要身份验证的服务器，那么它工作正常。

1. 所以我必须发送信息。
2. 获取身份验证质询请求。
3. 响应挑战请求。
4. 再次尝试重新发送请求，然后抛出错误。

不知道如何解决这个问题。任何帮助都会很棒。

Answer 1

谢谢，杰西。

以防万一，这是我为基本身份验证所做的代码。

首先，MyApplication类中的init:

ApiRequestInterceptor requestInterceptor = new ApiRequestInterceptor();
requestInterceptor.setUser(user); // I pass the user from my model

ApiService apiService = new RestAdapter.Builder()
            .setRequestInterceptor(requestInterceptor)
            .setServer(Constants.API_BASE_URL)
            .setClient(new OkClient()) // The default client didn't handle well responses like 401
            .build()
            .create(ApiService.class);

然后是ApiRequestInterceptor:

import android.util.Base64;
import retrofit.RequestInterceptor;

/**
 * Interceptor used to authorize requests.
 */
public class ApiRequestInterceptor implements RequestInterceptor {

    private User user;

    @Override
    public void intercept(RequestFacade requestFacade) {

        if (user != null) {
            final String authorizationValue = encodeCredentialsForBasicAuthorization();
            requestFacade.addHeader("Authorization", authorizationValue);
        }
    }

    private String encodeCredentialsForBasicAuthorization() {
        final String userAndPassword = user.getUsername() + ":" + user.getPassword();
        return "Basic " + Base64.encodeToString(userAndPassword.getBytes(), Base64.NO_WRAP);
    }

    public User getUser() {
        return user;
    }

    public void setUser(User user) {
        this.user = user;
    }
}