/// <summary>
/// 获取网页内容
/// </summary>
/// <param name="path">网页内容</param>
public async Task <string> GetHtmlAsync()
{
string html = "";
for (int i = 1; i <= Repetitions; i++)
{
Init();
try
{
using var response = (HttpWebResponse) await Request.GetResponseAsync();
StatusCode = response.StatusCode;
if (response != null && response.StatusCode == HttpStatusCode.OK)
{
html = GetResponseBody(response);
}
else if (response.StatusCode == HttpStatusCode.Moved)
{
string newUrl = response.Headers.GetValues("Location")[0];
jfYuRequest x = new jfYuRequest($"{newUrl}");
SetCookies = x.SetCookies;
return(await x.GetHtmlAsync());
}
else
{
return("");
}
SetCookies = response.Cookies;
response.Close();
break;
}
catch (WebException e)
{
if (e.Response != null)
{
StatusCode = ((HttpWebResponse)e.Response).StatusCode;
}
if (i >= Repetitions)
{
throw new Exception($"重复请求失败,地址:{Request.RequestUri},参数:{GetParaStr()},错误信息:{e.Message}", e);
}
else
{
await Task.Delay(5000);
}
}
catch (Exception ex)
{
if (i >= Repetitions)
{
throw new Exception($"重复请求失败,地址:{Request.RequestUri},参数:{GetParaStr()},错误信息:{ex.Message}", ex);
}
else
{
await Task.Delay(5000);
}
}
}
return(html);
}
public async Task <bool> GetFileAsync(string path, Action <decimal, decimal, decimal> setProgress = null)
{
Init();
HttpWebResponse response;
try
{
response = (HttpWebResponse)(await Request.GetResponseAsync());
StatusCode = response.StatusCode;
}
catch (WebException e)
{
StatusCode = ((HttpWebResponse)e.Response).StatusCode;
return(false);
}
if (response != null && response.StatusCode == HttpStatusCode.OK)
{
using Stream responseStream = response.GetResponseStream();
//文件大小
var FileSize = decimal.Parse(response.ContentLength.ToString());
//下载进度
decimal Progress = 0M;
//下载速度KB/s
decimal Speed = 0M;
//剩余时间/秒
decimal Remain = 0;
//下载文件块大小，后期可通过此次进行速度限制
byte[] buffer = new byte[4096];
try
{
using (FileStream fs = File.Create(path))
{
//开启计时
long LastSaveSize = 0;
var t = new System.Timers.Timer(1000)
{
AutoReset = true,
Enabled = true
};
t.Elapsed += (s, e) =>
{
LastSaveSize = fs.Length;
setProgress?.Invoke(Progress, Speed, Remain);
};
t.Start();
int bytesRead;
do
{
bytesRead = await responseStream.ReadAsync(buffer, 0, buffer.Length);
await fs.WriteAsync(buffer, 0, bytesRead);
//计算进度
Progress = fs.Length / FileSize * 100;
//计算速度
Speed = (decimal)(fs.Length - LastSaveSize) / 1024;
//剩余时间
Remain = Speed == 0 ? 0 : (FileSize - fs.Length) / (Speed * 1024);
}while (bytesRead > 0);
fs.Flush();
t.Stop();
setProgress?.Invoke(100M, 0M, 0M);
}
if (File.Exists(path) && new FileInfo(path).Length == FileSize)
{
return(true);
}
else
{
return(false);
}
}
catch (Exception ex)
{
throw new Exception("下载文件出错", ex);
}
}
else if (response.StatusCode == HttpStatusCode.Moved)
{
string newUrl = response.Headers.GetValues("Location")[0];
jfYuRequest x = new jfYuRequest($"{newUrl}");
return(await x.GetFileAsync(path, setProgress));
}
else
{
return(false);
}
}
