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工作者对象HttpWorkerRequest

标签:
C#

在ASP.NET中,用于处理的请求,需要封装为HttpWorkerRequest类型的对象。该类为抽象类,定义在命名空间System.Web下。

#region Assembly System.Web.dll, v4.0.0.0// C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.5\System.Web.dll#endregionusing System;using System.Runtime.InteropServices;using System.Security.Principal;using System.Text;using System.Web.Management;namespace System.Web
{    // Summary:    //     This abstract class defines the base worker methods and enumerations used    //     by ASP.NET managed code to process requests.
   [ComVisible(false)]    public abstract class HttpWorkerRequest
   {        // Summary:        //     Specifies the index number for the Accept HTTP header.
       public const int HeaderAccept = 20;        //
       // Summary:        //     Specifies the index number for the Accept-Charset HTTP header.
       public const int HeaderAcceptCharset = 21;        //
       // Summary:        //     Specifies the index number for the Accept-Encoding HTTP header.
       public const int HeaderAcceptEncoding = 22;        //
       // Summary:        //     Specifies the index number for the Accept-Language HTTP header.
       public const int HeaderAcceptLanguage = 23;        //
       // Summary:        //     Specifies the index number for the Accept-Ranges HTTP header.
       public const int HeaderAcceptRanges = 20;        //
       // Summary:        //     Specifies the index number for the Age HTTP header.
       public const int HeaderAge = 21;        //
       // Summary:        //     Specifies the index number for the Allow HTTP header.
       public const int HeaderAllow = 10;        //
       // Summary:        //     Specifies the index number for the Authorization HTTP header.
       public const int HeaderAuthorization = 24;        //
       // Summary:        //     The index that represents the HTTP Cache-Control HTTP header.
       public const int HeaderCacheControl = 0;        //
       // Summary:        //     Specifies the index number for the Connection HTTP header.
       public const int HeaderConnection = 1;        //
       // Summary:        //     Specifies the index number for the Content-Encoding HTTP header.
       public const int HeaderContentEncoding = 13;        //
       // Summary:        //     Specifies the index number for the Content-Language HTTP header.
       public const int HeaderContentLanguage = 14;        //
       // Summary:        //     Specifies the index number for the Content-Length HTTP header.
       public const int HeaderContentLength = 11;        //
       // Summary:        //     Specifies the index number for the Content-Location HTTP header.
       public const int HeaderContentLocation = 15;        //
       // Summary:        //     Specifies the index number for the Content-MD5 HTTP header.
       public const int HeaderContentMd5 = 16;        //
       // Summary:        //     Specifies the index number for the Content-Range HTTP header.
       public const int HeaderContentRange = 17;        //
       // Summary:        //     Specifies the index number for the Content-Type HTTP header.
       public const int HeaderContentType = 12;        //
       // Summary:        //     Specifies the index number for the Cookie HTTP header.
       public const int HeaderCookie = 25;        //
       // Summary:        //     Specifies the index number for the Date HTTP header.
       public const int HeaderDate = 2;        //
       // Summary:        //     Specifies the index number for the ETag HTTP header.
       public const int HeaderEtag = 22;        //
       // Summary:        //     Specifies the index number for the Except HTTP header.
       public const int HeaderExpect = 26;        //
       // Summary:        //     Specifies the index number for the Expires HTTP header.
       public const int HeaderExpires = 18;        //
       // Summary:        //     Specifies the index number for the From HTTP header.
       public const int HeaderFrom = 27;        //
       // Summary:        //     Specifies the index number for the Host HTTP header.
       public const int HeaderHost = 28;        //
       // Summary:        //     Specifies the index number for the If-Match HTTP header.
       public const int HeaderIfMatch = 29;        //
       // Summary:        //     Specifies the index number for the If-Modified-Since HTTP header.
       public const int HeaderIfModifiedSince = 30;        //
       // Summary:        //     Specifies the index number for the If-None-Match HTTP header.
       public const int HeaderIfNoneMatch = 31;        //
       // Summary:        //     Specifies the index number for the If-Range HTTP header.
       public const int HeaderIfRange = 32;        //
       // Summary:        //     Specifies the index number for the If-Unmodified-Since HTTP header.
       public const int HeaderIfUnmodifiedSince = 33;        //
       // Summary:        //     Specifies the index number for the Keep-Alive HTTP header.
       public const int HeaderKeepAlive = 3;        //
       // Summary:        //     Specifies the index number for the Last-Modified HTTP header.
       public const int HeaderLastModified = 19;        //
       // Summary:        //     Specifies the index number for the Location HTTP header.
       public const int HeaderLocation = 23;        //
       // Summary:        //     Specifies the index number for the Max-Forwards HTTP header.
       public const int HeaderMaxForwards = 34;        //
       // Summary:        //     Specifies the index number for the Pragma HTTP header.
       public const int HeaderPragma = 4;        //
       // Summary:        //     Specifies the index number for the Proxy-Authenticate HTTP header.
       public const int HeaderProxyAuthenticate = 24;        //
       // Summary:        //     Specifies the index number for the Proxy-Authorization HTTP header.
       public const int HeaderProxyAuthorization = 35;        //
       // Summary:        //     Specifies the index number for the Range HTTP header.
       public const int HeaderRange = 37;        //
       // Summary:        //     Specifies the index number for the Referer HTTP header.
       public const int HeaderReferer = 36;        //
       // Summary:        //     Specifies the index number for the Retry-After HTTP header.
       public const int HeaderRetryAfter = 25;        //
       // Summary:        //     Specifies the index number for the Server HTTP header.
       public const int HeaderServer = 26;        //
       // Summary:        //     Specifies the index number for the Set-Cookie HTTP header.
       public const int HeaderSetCookie = 27;        //
       // Summary:        //     Specifies the index number for the TE HTTP header.
       public const int HeaderTe = 38;        //
       // Summary:        //     Specifies the index number for the Trailer HTTP header.
       public const int HeaderTrailer = 5;        //
       // Summary:        //     Specifies the index number for the Transfer-Encoding HTTP header.
       public const int HeaderTransferEncoding = 6;        //
       // Summary:        //     Specifies the index number for the Upgrade HTTP header.
       public const int HeaderUpgrade = 7;        //
       // Summary:        //     Specifies the index number for the User-Agent HTTP header.
       public const int HeaderUserAgent = 39;        //
       // Summary:        //     Specifies the index number for the Vary HTTP header.
       public const int HeaderVary = 28;        //
       // Summary:        //     Specifies the index number for the Via HTTP header.
       public const int HeaderVia = 8;        //
       // Summary:        //     Specifies the index number for the Warning HTTP header.
       public const int HeaderWarning = 9;        //
       // Summary:        //     Specifies the index number for the WWW-Authenticate HTTP header.
       public const int HeaderWwwAuthenticate = 29;        //
       // Summary:        //     Specifies a reason for the request.
       public const int ReasonCachePolicy = 2;        //
       // Summary:        //     Specifies a reason for the request.
       public const int ReasonCacheSecurity = 3;        //
       // Summary:        //     Specifies a reason for the request.
       public const int ReasonClientDisconnect = 4;        //
       // Summary:        //     Specifies a reason for the request. The default value is System.Web.HttpWorkerRequest.ReasonResponseCacheMiss.
       public const int ReasonDefault = 0;        //
       // Summary:        //     Specifies a reason for the request.
       public const int ReasonFileHandleCacheMiss = 1;        //
       // Summary:        //     Specifies a reason for the request.
       public const int ReasonResponseCacheMiss = 0;        //
       // Summary:        //     Specifies the index number for the Maximum HTTP request header.
       public const int RequestHeaderMaximum = 40;        //
       // Summary:        //     Specifies the index number for the Maximum HTTP response header.
       public const int ResponseHeaderMaximum = 30;        // Summary:        //     Initializes a new instance of the System.Web.HttpWorkerRequest class.
       protected HttpWorkerRequest();        // Summary:        //     Gets the full physical path to the Machine.config file.        //
       // Returns:        //     The physical path to the Machine.config file.
       public virtual string MachineConfigPath { get; }        //
       // Summary:        //     Gets the physical path to the directory where the ASP.NET binaries are installed.        //
       // Returns:        //     The physical directory to the ASP.NET binary files.
       public virtual string MachineInstallDirectory { get; }        //
       // Summary:        //     Gets the corresponding Event Tracking for Windows trace ID for the current        //     request.        //
       // Returns:        //     A trace ID for the current ASP.NET request.
       public virtual Guid RequestTraceIdentifier { get; }        //
       // Summary:        //     Gets the full physical path to the root Web.config file.        //
       // Returns:        //     The physical path to the root Web.config file.
       public virtual string RootWebConfigPath { get; }        //
       // Summary:        //     Gets a value that indicates whether asynchronous flush operations are supported.        //
       // Returns:        //     true if asynchronous flush operations are supported; otherwise, false.
       public virtual bool SupportsAsyncFlush { get; }        //
       // Summary:        //     Gets a value that indicates whether asynchronous read operations are supported.        //
       // Returns:        //     true if asynchronous read operations are supported; otherwise, false.
       public virtual bool SupportsAsyncRead { get; }        // Summary:        //     Sends the currently buffered response to the client.        //
       // Parameters:        //   callback:        //     The method to call when a corresponding asynchronous operation completes.        //
       //   state:        //     A user-provided object that distinguishes this particular asynchronous flush        //     operation from other requests.        //
       // Returns:        //     The worker request buffers the status, headers, and response body until an        //     asynchronous flush operation is initiated. If the underlying System.Web.HttpWorkerRequest        //     object supports asynchronous flush and this method is called from an asynchronous        //     module event or asynchronous handler, the send operation is performed asynchronously.        //     Otherwise, the implementation performs a synchronous flush operation.
       public virtual IAsyncResult BeginFlush(AsyncCallback callback, object state);        //
       // Summary:        //     Begins an asynchronous read operation of the request entity body.        //
       // Parameters:        //   buffer:        //     The buffer to read the data into.        //
       //   offset:        //     The byte offset in the buffer at which to begin writing data.        //
       //   count:        //     The maximum number of bytes to read.        //
       //   callback:        //     The method to call when a corresponding asynchronous operation completes.        //
       //   state:        //     A user-provided object that distinguishes this particular asynchronous read        //     from other requests.
       public virtual IAsyncResult BeginRead(byte[] buffer, int offset, int count, AsyncCallback callback, object state);        //
       // Summary:        //     Terminates the connection with the client.
       public virtual void CloseConnection();        //
       // Summary:        //     Waits for the pending asynchronous flush operation to complete.        //
       // Parameters:        //   asyncResult:        //     A reference to the pending asynchronous request.
       public virtual void EndFlush(IAsyncResult asyncResult);        //
       // Summary:        //     Used by the runtime to notify the System.Web.HttpWorkerRequest that request        //     processing for the current request is complete.
       public abstract void EndOfRequest();        //
       // Summary:        //     Waits for the pending asynchronous read operation to complete.        //
       // Parameters:        //   asyncResult:        //     A reference to the pending asynchronous request.        //
       // Returns:        //     The number of bytes that have been read from the stream.
       public virtual int EndRead(IAsyncResult asyncResult);        //
       // Summary:        //     Sends all pending response data to the client.        //
       // Parameters:        //   finalFlush:        //     true if this is the last time response data will be flushed; otherwise, false.
       public abstract void FlushResponse(bool finalFlush);        //
       // Summary:        //     Returns the virtual path to the currently executing server application.        //
       // Returns:        //     The virtual path of the current application.
       public virtual string GetAppPath();        //
       // Summary:        //     Returns the physical path to the currently executing server application.        //
       // Returns:        //     The physical path of the current application.
       public virtual string GetAppPathTranslated();        //
       // Summary:        //     When overridden in a derived class, returns the application pool ID for the        //     current URL.        //
       // Returns:        //     Always returns null.
       public virtual string GetAppPoolID();        //
       // Summary:        //     Gets the number of bytes read in from the client.        //
       // Returns:        //     A Long containing the number of bytes read.
       public virtual long GetBytesRead();        //
       // Summary:        //     When overridden in a derived class, gets the certification fields (specified        //     in the X.509 standard) from a request issued by the client.        //
       // Returns:        //     A byte array containing the stream of the entire certificate content.
       public virtual byte[] GetClientCertificate();        //
       // Summary:        //     Gets the certificate issuer, in binary format.        //
       // Returns:        //     A byte array containing the certificate issuer expressed in binary format.
       public virtual byte[] GetClientCertificateBinaryIssuer();        //
       // Summary:        //     When overridden in a derived class, returns the System.Text.Encoding object        //     in which the client certificate was encoded.        //
       // Returns:        //     The certificate encoding, expressed as an integer.
       public virtual int GetClientCertificateEncoding();        //
       // Summary:        //     When overridden in a derived class, gets a PublicKey object associated with        //     the client certificate.        //
       // Returns:        //     A PublicKey object.
       public virtual byte[] GetClientCertificatePublicKey();        //
       // Summary:        //     When overridden in a derived class, gets the date when the certificate becomes        //     valid. The date varies with international settings.        //
       // Returns:        //     A System.DateTime object representing when the certificate becomes valid.
       public virtual DateTime GetClientCertificateValidFrom();        //
       // Summary:        //     Gets the certificate expiration date.        //
       // Returns:        //     A System.DateTime object representing the date that the certificate expires.
       public virtual DateTime GetClientCertificateValidUntil();        //
       // Summary:        //     When overridden in a derived class, returns the ID of the current connection.        //
       // Returns:        //     Always returns 0.
       public virtual long GetConnectionID();        //
       // Summary:        //     When overridden in a derived class, returns the virtual path to the requested        //     URI.        //
       // Returns:        //     The path to the requested URI.
       public virtual string GetFilePath();        //
       // Summary:        //     Returns the physical file path to the requested URI (and translates it from        //     virtual path to physical path: for example, "/proj1/page.aspx" to "c:\dir\page.aspx")        //
       // Returns:        //     The translated physical file path to the requested URI.
       public virtual string GetFilePathTranslated();        //
       // Summary:        //     Returns the specified member of the request header.        //
       // Returns:        //     The HTTP verb returned in the request header.
       public abstract string GetHttpVerbName();        //
       // Summary:        //     Provides access to the HTTP version of the request (for example, "HTTP/1.1").        //
       // Returns:        //     The HTTP version returned in the request header.
       public abstract string GetHttpVersion();        //
       // Summary:        //     Returns the standard HTTP request header that corresponds to the specified        //     index.        //
       // Parameters:        //   index:        //     The index of the header. For example, the System.Web.HttpWorkerRequest.HeaderAllow        //     field.        //
       // Returns:        //     The HTTP request header.
       public virtual string GetKnownRequestHeader(int index);        //
       // Summary:        //     Returns the index number of the specified HTTP request header.        //
       // Parameters:        //   header:        //     The name of the header.        //
       // Returns:        //     The index number of the HTTP request header specified in the header parameter.
       public static int GetKnownRequestHeaderIndex(string header);        //
       // Summary:        //     Returns the name of the specified HTTP request header.        //
       // Parameters:        //   index:        //     The index number of the header.        //
       // Returns:        //     The name of the HTTP request header specified in the index parameter.
       public static string GetKnownRequestHeaderName(int index);        //
       // Summary:        //     Returns the index number of the specified HTTP response header.        //
       // Parameters:        //   header:        //     The name of the HTTP header.        //
       // Returns:        //     The index number of the HTTP response header specified in the header parameter.
       public static int GetKnownResponseHeaderIndex(string header);        //
       // Summary:        //     Returns the name of the specified HTTP response header.        //
       // Parameters:        //   index:        //     The index number of the header.        //
       // Returns:        //     The name of the HTTP response header specified in the index parameter.
       public static string GetKnownResponseHeaderName(int index);        //
       // Summary:        //     Provides access to the specified member of the request header.        //
       // Returns:        //     The server IP address returned in the request header.
       public abstract string GetLocalAddress();        //
       // Summary:        //     Provides access to the specified member of the request header.        //
       // Returns:        //     The server port number returned in the request header.
       public abstract int GetLocalPort();        //
       // Summary:        //     Returns additional path information for a resource with a URL extension.        //     That is, for the path /virdir/page.html/tail, the GetPathInfo value is /tail.        //
       // Returns:        //     Additional path information for a resource.
       public virtual string GetPathInfo();        //
       // Summary:        //     Returns the portion of the HTTP request body that has already been read.        //
       // Returns:        //     The portion of the HTTP request body that has been read.
       public virtual byte[] GetPreloadedEntityBody();        //
       // Summary:        //     Gets the portion of the HTTP request body that has currently been read by        //     using the specified buffer data and byte offset.        //
       // Parameters:        //   buffer:        //     The data to read.        //
       //   offset:        //     The byte offset at which to begin reading.        //
       // Returns:        //     The portion of the HTTP request body that has been read.
       public virtual int GetPreloadedEntityBody(byte[] buffer, int offset);        //
       // Summary:        //     Gets the length of the portion of the HTTP request body that has currently        //     been read.        //
       // Returns:        //     An integer containing the length of the currently read HTTP request body.
       public virtual int GetPreloadedEntityBodyLength();        //
       // Summary:        //     When overridden in a derived class, returns the HTTP protocol (HTTP or HTTPS).        //
       // Returns:        //     HTTPS if the System.Web.HttpWorkerRequest.IsSecure() method is true, otherwise        //     HTTP.
       public virtual string GetProtocol();        //
       // Summary:        //     Returns the query string specified in the request URL.        //
       // Returns:        //     The request query string.
       public abstract string GetQueryString();        //
       // Summary:        //     When overridden in a derived class, returns the response query string as        //     an array of bytes.        //
       // Returns:        //     An array of bytes containing the response.
       public virtual byte[] GetQueryStringRawBytes();        //
       // Summary:        //     Returns the URL path contained in the request header with the query string        //     appended.        //
       // Returns:        //     The raw URL path of the request header.
       public abstract string GetRawUrl();        //
       // Summary:        //     Provides access to the specified member of the request header.        //
       // Returns:        //     The client's IP address.
       public abstract string GetRemoteAddress();        //
       // Summary:        //     When overridden in a derived class, returns the name of the client computer.        //
       // Returns:        //     The name of the client computer.
       public virtual string GetRemoteName();        //
       // Summary:        //     Provides access to the specified member of the request header.        //
       // Returns:        //     The client's HTTP port number.
       public abstract int GetRemotePort();        //
       // Summary:        //     When overridden in a derived class, returns the reason for the request.        //
       // Returns:        //     Reason code. The default is ReasonResponseCacheMiss.
       public virtual int GetRequestReason();        //
       // Summary:        //     When overridden in a derived class, returns the name of the local server.        //
       // Returns:        //     The name of the local server.
       public virtual string GetServerName();        //
       // Summary:        //     Returns a single server variable from a dictionary of server variables associated        //     with the request.        //
       // Parameters:        //   name:        //     The name of the requested server variable.        //
       // Returns:        //     The requested server variable.
       public virtual string GetServerVariable(string name);        //
       // Summary:        //     Returns a string that describes the name of the specified HTTP status code.        //
       // Parameters:        //   code:        //     The HTTP status code.        //
       // Returns:        //     The status description. For example, System.Web.HttpWorkerRequest.GetStatusDescription(System.Int32)        //     (404) returns "Not Found".
       public static string GetStatusDescription(int code);        //
       // Summary:        //     Gets the length of the entire HTTP request body.        //
       // Returns:        //     An integer containing the length of the entire HTTP request body.
       public virtual int GetTotalEntityBodyLength();        //
       // Summary:        //     Returns a nonstandard HTTP request header value.        //
       // Parameters:        //   name:        //     The header name.        //
       // Returns:        //     The header value.
       public virtual string GetUnknownRequestHeader(string name);        //
       // Summary:        //     Get all nonstandard HTTP header name-value pairs.        //
       // Returns:        //     An array of header name-value pairs.
       [CLSCompliant(false)]        public virtual string[][] GetUnknownRequestHeaders();        //
       // Summary:        //     Returns the virtual path to the requested URI.        //
       // Returns:        //     The path to the requested URI.
       public abstract string GetUriPath();        //
       // Summary:        //     When overridden in a derived class, returns the context ID of the current        //     connection.        //
       // Returns:        //     Always returns 0.
       public virtual long GetUrlContextID();        //
       // Summary:        //     When overridden in a derived class, returns the client's impersonation token.        //
       // Returns:        //     A value representing the client's impersonation token. The default is 0.
       public virtual IntPtr GetUserToken();        //
       // Summary:        //     Gets the impersonation token for the request virtual path.        //
       // Returns:        //     An unmanaged memory pointer for the token for the request virtual path.
       public virtual IntPtr GetVirtualPathToken();        //
       // Summary:        //     Returns a value indicating whether the request contains body data.        //
       // Returns:        //     true if the request contains body data; otherwise, false.
       public bool HasEntityBody();        //
       // Summary:        //     Returns a value indicating whether HTTP response headers have been sent to        //     the client for the current request.        //
       // Returns:        //     true if HTTP response headers have been sent to the client; otherwise, false.
       public virtual bool HeadersSent();        //
       // Summary:        //     Returns a value indicating whether the client connection is still active.        //
       // Returns:        //     true if the client connection is still active; otherwise, false.
       public virtual bool IsClientConnected();        //
       // Summary:        //     Returns a value indicating whether all request data is available and no further        //     reads from the client are required.        //
       // Returns:        //     true if all request data is available; otherwise, false.
       public virtual bool IsEntireEntityBodyIsPreloaded();        //
       // Summary:        //     Returns a value indicating whether the connection uses SSL.        //
       // Returns:        //     true if the connection is an SSL connection; otherwise, false. The default        //     is false.
       public virtual bool IsSecure();        //
       // Summary:        //     Returns the physical path corresponding to the specified virtual path.        //
       // Parameters:        //   virtualPath:        //     The virtual path.        //
       // Returns:        //     The physical path that corresponds to the virtual path specified in the virtualPath        //     parameter.
       public virtual string MapPath(string virtualPath);        //
       // Summary:        //     Reads request data from the client (when not preloaded).        //
       // Parameters:        //   buffer:        //     The byte array to read data into.        //
       //   size:        //     The maximum number of bytes to read.        //
       // Returns:        //     The number of bytes read.
       public virtual int ReadEntityBody(byte[] buffer, int size);        //
       // Summary:        //     Reads request data from the client (when not preloaded) by using the specified        //     buffer to read from, byte offset, and maximum bytes.        //
       // Parameters:        //   buffer:        //     The byte array to read data into.        //
       //   offset:        //     The byte offset at which to begin reading.        //
       //   size:        //     The maximum number of bytes to read.        //
       // Returns:        //     The number of bytes read.
       public virtual int ReadEntityBody(byte[] buffer, int offset, int size);        //
       // Summary:        //     Adds a Content-Length HTTP header to the response for message bodies that        //     are less than or equal to 2 GB.        //
       // Parameters:        //   contentLength:        //     The length of the response, in bytes.
       public virtual void SendCalculatedContentLength(int contentLength);        //
       // Summary:        //     Adds a Content-Length HTTP header to the response for message bodies that        //     are greater than 2 GB.        //
       // Parameters:        //   contentLength:        //     The length of the response, in bytes.
       public virtual void SendCalculatedContentLength(long contentLength);        //
       // Summary:        //     Adds a standard HTTP header to the response.        //
       // Parameters:        //   index:        //     The header index. For example, System.Web.HttpWorkerRequest.HeaderContentLength.        //
       //   value:        //     The value of the header.
       public abstract void SendKnownResponseHeader(int index, string value);        //
       // Summary:        //     Adds the contents of the specified file to the response and specifies the        //     starting position in the file and the number of bytes to send.        //
       // Parameters:        //   handle:        //     The handle of the file to send.        //
       //   offset:        //     The starting position in the file.        //
       //   length:        //     The number of bytes to send.
       public abstract void SendResponseFromFile(IntPtr handle, long offset, long length);        //
       // Summary:        //     Adds the contents of the specified file to the response and specifies the        //     starting position in the file and the number of bytes to send.        //
       // Parameters:        //   filename:        //     The name of the file to send.        //
       //   offset:        //     The starting position in the file.        //
       //   length:        //     The number of bytes to send.
       public abstract void SendResponseFromFile(string filename, long offset, long length);        //
       // Summary:        //     Adds the specified number of bytes from a byte array to the response.        //
       // Parameters:        //   data:        //     The byte array to send.        //
       //   length:        //     The number of bytes to send, starting at the first byte.
       public abstract void SendResponseFromMemory(byte[] data, int length);        //
       // Summary:        //     Adds the specified number of bytes from a block of memory to the response.        //
       // Parameters:        //   data:        //     An unmanaged pointer to the block of memory.        //
       //   length:        //     The number of bytes to send.
       public virtual void SendResponseFromMemory(IntPtr data, int length);        //
       // Summary:        //     Specifies the HTTP status code and status description of the response, such        //     as SendStatus(200, "Ok").        //
       // Parameters:        //   statusCode:        //     The status code to send        //
       //   statusDescription:        //     The status description to send.
       public abstract void SendStatus(int statusCode, string statusDescription);        //
       // Summary:        //     Adds a nonstandard HTTP header to the response.        //
       // Parameters:        //   name:        //     The name of the header to send.        //
       //   value:        //     The value of the header.
       public abstract void SendUnknownResponseHeader(string name, string value);        //
       // Summary:        //     Registers for an optional notification when all the response data is sent.        //
       // Parameters:        //   callback:        //     The notification callback that is called when all data is sent (out-of-band).        //
       //   extraData:        //     An additional parameter to the callback.
       public virtual void SetEndOfSendNotification(HttpWorkerRequest.EndOfSendNotification callback, object extraData);        // Summary:        //     Represents the method that Notifies callers when sending of the response        //     is complete.        //
       // Parameters:        //   wr:        //     The current System.Web.HttpWorkerRequest.        //
       //   extraData:        //     Any additional data needed to process the request.
       public delegate void EndOfSendNotification(HttpWorkerRequest wr, object extraData);
   }
}

View Code

该类是一个很底层的类,主要用于asp.net服务器内部,在一些特殊情况下,可以完成一些特殊的任务,比如,上传文件时,默认情况下,asp.net会将上传的文件内容读取到服务器的内存中,然后通过控件的方式供我们使用。这种在上传小文件的时候很方便,大文件的时候,服务器内存将出现问题,导致浏览器不能将文件继续传输。浏览器将显示“The page cannot be displayed -cannot find server or dns error.”,这个错误无法在服务器端进行捕获或者处理。

借助HttpWorkerRequest的GetPreloadedEntityBody和ReadEntityBody方法,我们可以自己分块从客户端读取上传的文件内容。然后将内容保存在一个临时文件中.

SlickUpload组件,就是基于这个实现的。感兴趣的可以看看这篇文章,如何使用该组件。

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