如何在代码中设置useUnsafeHeaderParsing

我收到以下exception：

服务器提交了协议违规。 Section = ResponseHeader Detail = CR必须后跟LF

从这个问题：

HttpWebRequestError：服务器提交了协议违规。 Section = ResponseHeader Detail = CR必须后跟LF

我知道我需要将useUnsafeHeaderParsing设置为True。

这是我的代码：

HttpWebRequest myReq = (HttpWebRequest)WebRequest.Create(url); WebResponse myResp = myReq.GetResponse(); //exception is thrown here 

useUnsafeHeaderParsing是HttpWebRequestElement类的属性。

如何将其集成到上面的代码中？

非常感谢！

Answer 1

您需要将此设置在您的web.config中，在部分中，如下所示：

如果由于某种原因，您不想从配置中执行此操作，则可以通过以编程方式设置配置设置从代码执行此操作。 有关示例，请参阅此页面 。

Answer 2

正如Edwin所指出的，您需要在web.config或app.config文件中设置useUnsafeHeaderParsing属性。 如果您确实想在运行时动态更改值，那么您将不得不求助于reflection，因为该值隐藏在System.Net.Configuration.SettingsSectionInternal的实例中，并且不可公开访问。

这是一个代码示例（基于此处的信息），可以解决这个问题：

 using System; using System.Net; using System.Net.Configuration; using System.Reflection; namespace UnsafeHeaderParsingSample { class Program { static void Main() { // Enable UseUnsafeHeaderParsing if (!ToggleAllowUnsafeHeaderParsing(true)) { // Couldn't set flag. Log the fact, throw an exception or whatever. } // This request will now allow unsafe header parsing, ie GetResponse won't throw an exception. var request = (HttpWebRequest) WebRequest.Create("http://localhost:8000"); var response = request.GetResponse(); // Disable UseUnsafeHeaderParsing if (!ToggleAllowUnsafeHeaderParsing(false)) { // Couldn't change flag. Log the fact, throw an exception or whatever. } // This request won't allow unsafe header parsing, ie GetResponse will throw an exception. var strictHeaderRequest = (HttpWebRequest)WebRequest.Create("http://localhost:8000"); var strictResponse = strictHeaderRequest.GetResponse(); } // Enable/disable useUnsafeHeaderParsing. // See http://o2platform.wordpress.com/2010/10/20/dealing-with-the-server-committed-a-protocol-violation-sectionresponsestatusline/ public static bool ToggleAllowUnsafeHeaderParsing(bool enable) { //Get the assembly that contains the internal class Assembly assembly = Assembly.GetAssembly(typeof(SettingsSection)); if (assembly != null) { //Use the assembly in order to get the internal type for the internal class Type settingsSectionType = assembly.GetType("System.Net.Configuration.SettingsSectionInternal"); if (settingsSectionType != null) { //Use the internal static property to get an instance of the internal settings class. //If the static instance isn't created already invoking the property will create it for us. object anInstance = settingsSectionType.InvokeMember("Section", BindingFlags.Static | BindingFlags.GetProperty | BindingFlags.NonPublic, null, null, new object[] { }); if (anInstance != null) { //Locate the private bool field that tells the framework if unsafe header parsing is allowed FieldInfo aUseUnsafeHeaderParsing = settingsSectionType.GetField("useUnsafeHeaderParsing", BindingFlags.NonPublic | BindingFlags.Instance); if (aUseUnsafeHeaderParsing != null) { aUseUnsafeHeaderParsing.SetValue(anInstance, enable); return true; } } } } return false; } } }