状况
构建一个Azure Function用于定时下载数据到Azure Storage Account里的Blob下。下载数据的部分用WebClient来处理。但是每次触发都报了连接超时的错误。
错误:
A connection attempt failed because the connected party did not properly respond after a period of time
代码:
using (WebClient client = new WebClient())
{
client.Encoding = Encoding.UTF8;
string sourceUrl = "https://i0.kym-cdn.com/photos/images/original/001/287/555/106.jpg";
try
{
using (Stream stream = client.OpenRead(new Uri(sourceUrl)))
{
await SaveToBlobAsync(stream, log);
}
}
catch (Exception ex)
{
log.LogError(ex.Message);
throw;
}
}
原因
应该是公司内部网络的防火墙限制导致的,但是没法改变。
解决方法
为了能够顺利调试程序,为WebClient加上Proxy后成功下载数据。
using (WebClient client = new WebClient())
{
client.Encoding = Encoding.UTF8;
WebProxy proxy = new WebProxy("your proxy host IP", port);
client.Proxy = proxy;
string sourceUrl = "https://i0.kym-cdn.com/photos/images/original/001/287/555/106.jpg";
try
{
using (Stream stream = client.OpenRead(new Uri(noaaSourceUrl)))
{
await SaveToBlobAsync(stream, log);
}
}
catch (Exception ex)
{
log.LogError(ex.Message);
throw;
}
}
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