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 <bool> DownloadAsync(IList <string> urls)
{
cacheFolder = await ApplicationData.Current.LocalFolder.GetFolderAsync("Cache");
foreach (var url in urls)
{
string fileName = EncryptUtils.GetMd5String(url);
//如果文件不存在或者为空文件，则开始下载
if (!await StorageHelper.Instance.StorageItemExistsAsync("Cache/" + fileName))
{
System.Diagnostics.Debug.WriteLine("Begin Cache Pic");
var storageFile = await cacheFolder.CreateFileAsync(fileName, CreationCollisionOption.OpenIfExists);
await SaveImage(url, storageFile);
}
}
return(true);
}
public async void BeginDownloadAsync(IList <string> urls)
{
cacheFolder = await ApplicationData.Current.LocalFolder.GetFolderAsync("Cache");
urlList.AddRange(urls);
for (int i = 0; i < urlList.Count; i++)
{
string fileName = EncryptUtils.GetMd5String(urlList[i]);
var storageFile = await cacheFolder.CreateFileAsync(fileName, CreationCollisionOption.OpenIfExists);
//如果文件不存在或者为空文件，则开始下载
if (!await StorageHelper.Instance.StorageItemExistsAsync(fileName))
{
await SaveImage(urlList[i], storageFile);
}
if (ImgLoadedProcess != null)
{
ImgLoadedProcess(urlList[i], storageFile);
}
}
}
