优化代理实现

Author: zlzforever

package.props

@@ -4,9 +4,9 @@
     <GeneratePackageOnBuild>true</GeneratePackageOnBuild>
     <PackageRequireLicenseAcceptance>true</PackageRequireLicenseAcceptance>
     <PackageLicenseFile>LICENSE.txt</PackageLicenseFile>
-    <Version>5.0.7</Version>
-    <FileVersion>5.0.7.0</FileVersion>
-    <AssemblyVersion>5.0.7.0</AssemblyVersion>
+    <Version>5.0.8</Version>
+    <FileVersion>5.0.8.0</FileVersion>
+    <AssemblyVersion>5.0.8.0</AssemblyVersion>
     <Authors>[email protected];</Authors>
     <Copyright>Copyright 2018 Lewis Zou</Copyright>
     <Description>DotnetSpider, a .NET Standard web crawling library. It is lightweight, efficient and fast high-level web crawling &amp; scraping framework</Description>

src/DotnetSpider/Proxy/ProxyService.cs

@@ -69,7 +69,7 @@ public async Task ReturnAsync(Uri proxy, HttpStatusCode statusCode)
 				}
 
 				// 若是失败次数为 reDetectCount 的倍数则尝试重新测试此代理是否正常，若是测试不成功，则把此代理从缓存中删除，不再使用
-				if (p.FailedNum % _reDetectCount == 0 &&
+				if ((p.FailedNum != 0 && p.FailedNum % _reDetectCount == 0) &&
 				    !await _proxyValidator.IsAvailable(p.Uri))
 				{
 					_dict.TryRemove(p.Uri, out _);
@@ -87,7 +87,7 @@ public async Task<int> AddAsync(IEnumerable<Uri> proxies)
 			{
 				if (await _proxyValidator.IsAvailable(proxy) && _dict.TryAdd(proxy, new ProxyEntry(proxy)))
 				{
-					_logger.LogInformation($"Proxy {proxy} is available");
+					_logger.LogInformation($"proxy {proxy} is available");
 					_queue.Enqueue(_dict[proxy]);
 					cnt++;
 				}