消耗来自Okhttp的One-Shot ResponseBody会导致Retrofit出现问题

Question

我正在使用带有Okhttp拦截器的Retrofit来检测我的oauth令牌是否已过期.如果令牌已过期,我想请求新令牌,再次尝试请求,然后将该响应发送到Retrofit.

这是我的拦截器类:

public class CustomInterceptor implements Interceptor {

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

    // try the request
    Response response = chain.proceed(request);

    if (response.body().string().contains(Constants.TOKEN_AUTH_ERROR_MESSAGE)) {
        Log.v("retrofit_error", "token expired");

        //get current token, create headers
        OAuthTokenResponse expiredToken = SharedPreferencesUtil.getOAuthToken();

        OAuthTokenResponse newOauthToken = RestClient.getInstance().getTokenService().refreshOauthToken(expiredToken.getRefreshToken());

        //store new token, return
        SharedPreferencesUtil.saveOAuthToken(newOauthToken);

        // create a new request and modify it accordingly using the new token
        Request.Builder newRequestBuilder = request.newBuilder()
                .removeHeader("Authorization");

        Request newRequest = newRequestBuilder.addHeader("Authorization", SharedPreferencesUtil.getOAuthToken().getAccessToken()).build();
        // retry the request
        return chain.proceed(newRequest);
    }

    // otherwise just pass the original response on
    return response;
}

}

问题是调用response.body.string()会消耗ResponseBody,因为它是Okhttp docs状态的一次性值.

这意味着代码末尾返回的响应将在传递给改进时不再对主体进行容器化.有没有什么方法可以消耗身体,同时仍然回复它？

谢谢!

Answer 1

我通过使用Response.Builder创建一个新的响应来实现这一点.我可以用responseBodyString我的支票; 然后我回来了newResponse,这是给我消耗的身体.

Request request = chain.request();
Response response = chain.proceed(request);

ResponseBody responseBody = response.body();
String responseBodyString = response.body().string();
Response newResponse = response.newBuilder().body(ResponseBody.create(responseBody.contentType(), responseBodyString.getBytes())).build();

...

return newResponse;