从Okhttp消费单次ResponseBody导致与改造问题 [英] Consuming One-Shot ResponseBody from Okhttp causes issues with Retrofit

问题描述

我为了我使用与Okhttp拦截器的改造，以检测是否我的OAuth令牌已过期。如果令牌已经到期，我想申请一个新的令牌，再次尝试请求，然后发送响应改造。

I am using an Retrofit with an Okhttp interceptor in order to detect if my oauth token has expired. If the token has expired, I want to request a new token, try the request again, then send that response to Retrofit.

下面是我的拦截器类：

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由于它是一次性的值作为Okhttp文档状态。

The issue is that calling response.body.string() will consume the ResponseBody due to it being a one-shot value as the Okhttp docs state.

这意味着，响应于code将不再容器时，它被传递给改型体的端返回。有没有办法，我可以消耗掉体内的同时仍与响应返回任何方式？

This means that the Response returned at the end of the code will no longer container the body when it is passed off to retrofit. Is there any way that I can consume the body while still returning it with the response?

谢谢！

推荐答案

我通过创建一个新的应答实现这个<一个href=\"http://square.github.io/okhttp/javadoc/com/squareup/okhttp/Response.Builder.html\">Response.Builder.我可以使用 responseBodyString 我的检查;然后我返回 newResponse ，这是因为我消耗身体。

I accomplished this by creating a new response using the Response.Builder. I am able to use responseBodyString for my checks; then I return newResponse, which is given the body that I consumed.

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;

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