相关疑难解决方法(0)

我正在尝试使用Retrofit和OKHttp来缓存HTTP响应.我按照这个要点,结束了这段代码:

File httpCacheDirectory = new File(context.getCacheDir(), "responses");

HttpResponseCache httpResponseCache = null;
try {
     httpResponseCache = new HttpResponseCache(httpCacheDirectory, 10 * 1024 * 1024);
} catch (IOException e) {
     Log.e("Retrofit", "Could not create http cache", e);
}

OkHttpClient okHttpClient = new OkHttpClient();
okHttpClient.setResponseCache(httpResponseCache);

api = new RestAdapter.Builder()
          .setEndpoint(API_URL)
          .setLogLevel(RestAdapter.LogLevel.FULL)
          .setClient(new OkClient(okHttpClient))
          .build()
          .create(MyApi.class);

这是带有Cache-Control标头的MyApi

public interface MyApi {
   @Headers("Cache-Control: public, max-age=640000, s-maxage=640000 , max-stale=2419200")
   @GET("/api/v1/person/1/")
   void requestPerson(
           Callback<Person> callback
   );

首先,我在线请求并检查缓存文件.有正确的JSON响应和标题.但是当我尝试离线请求时,我总是得到RetrofitError UnknownHostException.我还有什么办法让Retrofit从缓存中读取响应吗？

编辑: 因为OKHttp 2.0.x HttpResponseCache是Cache …

我使用以下身份验证作为标题调用 Magento API，

auth = "OAuth oauth_consumer_key=**********************,oauth_consumer_secret=****************,oauth_token=************,oauth_token_secret=**************,oauth_signature_method=HMAC-SHA1,oauth_timestamp=" + ConstantFunctions.GetTimeStamp() + ",oauth_nonce=" + ConstantFunctions.GetNonce() + ",oauth_signature=*******************) ;

当我调用 API 时，获取错误oauth_problem=signature_invalid。所有其他参数验证成功但签名中出现错误，我尝试使用以下代码生成签名，

     public static String GETHMACSHA1(String value, String key)
            throws UnsupportedEncodingException, NoSuchAlgorithmException,
            InvalidKeyException {
        String type = "HmacSHA1";
        SecretKeySpec secret = new SecretKeySpec(key.getBytes(), type);
        Mac mac = Mac.getInstance(type);
        mac.init(secret);
        byte[] bytes = mac.doFinal(value.getBytes());
        return bytesToHex(bytes);
    }

    private final static char[] hexArray = "0123456789abcdef".toCharArray();

    private static String bytesToHex(byte[] bytes) {
        char[] hexChars = new char[bytes.length * 2];
        int v;
        for (int j …