public async Task <T> GetObjectAsync(params string[] parameter)
{
//先判断网络状态
string rootUrl = "http://news-at.zhihu.com/api/4";
List <string> paras = new List <string>(parameter);
paras.ForEach(p => rootUrl += "/" + p);
string cacheName = EncryptUtils.GetMd5String(rootUrl);
string cacheFilePath = $"Cache/{ cacheName}";
try
{
if (await StorageHelper.Instance.StorageItemExistsAsync(cacheFilePath)) //判断是否有缓存await CacheManager.Instance.CacheIsAvailable(cacheName)
{
if (rootUrl.Contains("latest")) //判断是否是今日消息请求
{
string jsonResult2 = string.Empty;
if (!await StorageHelper.Instance.CacheFileIsOutDate(cacheFilePath) || NetWorkHelper.NetWrokState == 0) //判断是否过期
{
jsonResult2 = await StorageHelper.Instance.ReadTextAsync(cacheFilePath); //如果缓存未过期或者没有网络
System.Diagnostics.Debug.WriteLine("lastnews---从缓存加载");
}
else
{
jsonResult2 = await GetJsonDataAsync(rootUrl);
if (!string.IsNullOrEmpty(jsonResult2))
{
await StorageHelper.Instance.WriteTextAsync(jsonResult2, cacheFilePath, true);
}
}
return(string.IsNullOrEmpty(jsonResult2) ? new T() : JsonConvertHelper.JsonDeserialize <T>(jsonResult2));
}
else
{
var jsonResult3 = await StorageHelper.Instance.ReadTextAsync(cacheFilePath);
System.Diagnostics.Debug.WriteLine(rootUrl + "---从缓存加载----" + jsonResult3);
return(string.IsNullOrEmpty(jsonResult3) ? new T() : JsonConvertHelper.JsonDeserialize <T>(jsonResult3));
}
}
else
{
var jsonResult4 = await GetJsonDataAsync(rootUrl);
if (!string.IsNullOrEmpty(jsonResult4))
{
await StorageHelper.Instance.WriteTextAsync(jsonResult4, cacheFilePath, true);
}
return(string.IsNullOrEmpty(jsonResult4) ? new T() : JsonConvertHelper.JsonDeserialize <T>(jsonResult4));
}
}
catch (Exception ex)
{
System.Diagnostics.Debug.WriteLine("Error at GetObjectAsync:" + ex);
ExceptionsParameter = "未能获取到数据";
return(new T());
}
}
public async Task <T> GetNotAvailableCacheObjAsync(params string[] parameter)
{
string rootUrl = "http://news-at.zhihu.com/api/4";
List <string> paras = new List <string>(parameter);
paras.ForEach(p => rootUrl += "/" + p);
string jsonResult = string.Empty;
if (NetWorkHelper.NetWrokState != 0)
{
jsonResult = await GetJsonDataAsync(rootUrl);
}
return(string.IsNullOrEmpty(jsonResult) ? new T() : JsonConvertHelper.JsonDeserialize <T>(jsonResult));
}
/// <summary>
/// 通用获取接口泛型方法
/// </summary>
/// <typeparam name="T">类型</typeparam>
/// <param name="url">接口url</param>
/// <returns></returns>
protected static async Task <T> GetDataAsync <T>(string url, string para = "")
{
var httpClientHandler = new RetryHandler(new MyHttpClientHandler());
var httpClient = new HttpClient(httpClientHandler);
var ContentUri = string.IsNullOrEmpty(para) ? new Uri(url) : new Uri(string.Format(url, para));
var response = new HttpResponseMessage();
try
{
response = await httpClient.GetAsync(ContentUri);
response.EnsureSuccessStatusCode();
string responseText = await response.Content.ReadAsStringAsync();
return(JsonConvertHelper.JsonDeserialize <T>(responseText));
}
catch (Exception)
{
return(default(T));
}
}
