android - OkHttp 拦截器 - 响应已经 "consumed"

Question

我正在尝试使用此拦截器进行身份验证:

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 shows expired token) {

        // get a new token (I use a synchronous Retrofit call)

        // create a new request and modify it accordingly using the new token
        Request newRequest = request.newBuilder()...build();

        // retry the request
        return chain.proceed(newRequest);
    }

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

问题是我的检查(响应显示过期 token )与状态无关，我需要检查实际响应(正文内容)。因此，在检查之后，响应被“消耗”并且任何准备主体的尝试都将失败。

我尝试在读取之前“克隆”响应缓冲区，例如:

public static String responseAsString(Response response ){
    Buffer clonedBuffer = response.body().source().buffer().clone();
    return ByteString.of(clonedBuffer.readByteArray()).toString();
}

但它不起作用，cloneBuffer 是空的。任何帮助将不胜感激。

Answer 1

我自己也遇到了同样的问题，我找到的解决方案是消耗响应的主体并用新的主体构建新的响应。我是这样做的:

...

Response response = chain.proceed(request);
MediaType contentType = response.body().contentType();

String bodyString = response.body().string();
if (tokenExpired(bodyString)) {
    // your logic here...
}

ResponseBody body = ResponseBody.create(contentType, bodyString);
return response.newBuilder().body(body).build();