2つの異なるWebアプリケーション間で通信するWebアプリケーションがあります(1つの受信者と1つの送信者、送信者は私のアプリケーションと通信し、私のアプリケーションは両方と通信します)。
通常のシナリオでは、送信者がHttpRequestをアプリケーションに送信し、それをHttpHandlerで受信します。これにより、HttpContextがいくつかのビジネスロジックに送信され、配管が行われます。
ビジネスクラスでデータの保存(一部のログ記録など)が完了したら、すべてのヘッダー、フォームデータなどを含む同じ要求を受信側アプリケーションに中継します。これは、HttpHandlerではなく、クラスから送信する必要があります。
問題は本当にです-どうすればHttpContextオブジェクトを取得し、URLを http://myserver.com/ から http://に変更するだけで、まったく同じリクエストを転送/リレーできます。 receiver.com 。
望ましいc#のコード例はすばらしいでしょう!
実際、このようなものはうまくいきました
HttpRequest original = context.Request;
HttpWebRequest newRequest = (HttpWebRequest)WebRequest.Create(newUrl);
newRequest .ContentType = original.ContentType;
newRequest .Method = original.HttpMethod;
newRequest .UserAgent = original.UserAgent;
byte[] originalStream = ReadToByteArray(original.InputStream, 1024);
Stream reqStream = newRequest .GetRequestStream();
reqStream.Write(originalStream, 0, originalStream.Length);
reqStream.Close();
newRequest .GetResponse();
編集:ReadToByteArrayメソッドは、ストリームからバイト配列を作成するだけです
HttpResponseBase
に拡張メソッドがあり、受信リクエストを送信リクエストにコピーします。
使用法:
var externalRequest = (HttpWebRequest)WebRequest.Create("http://stackoverflow.com");
this.Request.CopyTo(externalRequest);
var externalResponse = (HttpWebResponse)externalRequest.GetResponse();
ソース:
/// <summary>
/// Copies all headers and content (except the URL) from an incoming to an outgoing
/// request.
/// </summary>
/// <param name="source">The request to copy from</param>
/// <param name="destination">The request to copy to</param>
public static void CopyTo(this HttpRequestBase source, HttpWebRequest destination)
{
destination.Method = source.HttpMethod;
// Copy unrestricted headers (including cookies, if any)
foreach (var headerKey in source.Headers.AllKeys)
{
switch (headerKey)
{
case "Connection":
case "Content-Length":
case "Date":
case "Expect":
case "Host":
case "If-Modified-Since":
case "Range":
case "Transfer-Encoding":
case "Proxy-Connection":
// Let IIS handle these
break;
case "Accept":
case "Content-Type":
case "Referer":
case "User-Agent":
// Restricted - copied below
break;
default:
destination.Headers[headerKey] = source.Headers[headerKey];
break;
}
}
// Copy restricted headers
if (source.AcceptTypes.Any())
{
destination.Accept = string.Join(",", source.AcceptTypes);
}
destination.ContentType = source.ContentType;
destination.Referer = source.UrlReferrer.AbsoluteUri;
destination.UserAgent = source.UserAgent;
// Copy content (if content body is allowed)
if (source.HttpMethod != "GET"
&& source.HttpMethod != "HEAD"
&& source.ContentLength > 0)
{
var destinationStream = destination.GetRequestStream();
source.InputStream.CopyTo(destinationStream);
destinationStream.Close();
}
}
以下は、MVCを使用したVB.NETの優れたリレーコードです。
Public Class MvcApplication
Inherits System.Web.HttpApplication
Shared Sub RegisterRoutes(ByVal routes As RouteCollection)
routes.MapRoute("Default", "{*s}", New With {.controller = "Home", .action = "Index"})
End Sub
Sub Application_Start()
RegisterRoutes(RouteTable.Routes)
End Sub
End Class
Option Explicit On
Option Strict On
Imports System.Net
<HandleError()> _
Public Class HomeController
Inherits System.Web.Mvc.Controller
Function Index(ByVal s As String) As ActionResult
Server.ScriptTimeout = 60 * 60
If Request.QueryString.ToString <> "" Then s = s + "?" + Request.QueryString.ToString
Dim req As HttpWebRequest = CType(WebRequest.Create("http://stackoverflow.com/" + s), HttpWebRequest)
req.AllowAutoRedirect = False
req.Method = Request.HttpMethod
req.Accept = Request.Headers("Accept")
req.Referer = Request.Headers("Referer")
req.UserAgent = Request.UserAgent
For Each h In Request.Headers.AllKeys
If Not (New String() {"Connection", "Accept", "Host", "User-Agent", "Referer"}).Contains(h) Then
req.Headers.Add(h, Request.Headers(h))
End If
Next
If Request.HttpMethod <> "GET" Then
Using st = req.GetRequestStream
StreamCopy(Request.InputStream, st)
End Using
End If
Dim resp As WebResponse = Nothing
Try
Try
resp = req.GetResponse()
Catch ex As WebException
resp = ex.Response
End Try
If resp IsNot Nothing Then
Response.StatusCode = CType(resp, HttpWebResponse).StatusCode
For Each h In resp.Headers.AllKeys
If Not (New String() {"Content-Type"}).Contains(h) Then
Response.AddHeader(h, resp.Headers(h))
End If
Next
Response.ContentType = resp.ContentType
Using st = resp.GetResponseStream
StreamCopy(st, Response.OutputStream)
End Using
End If
Finally
If resp IsNot Nothing Then resp.Close()
End Try
Return Nothing
End Function
Sub StreamCopy(ByVal input As IO.Stream, ByVal output As IO.Stream)
Dim buf(0 To 16383) As Byte
Using br = New IO.BinaryReader(input)
Using bw = New IO.BinaryWriter(output)
Do
Dim rb = br.Read(buf, 0, buf.Length)
If rb = 0 Then Exit Do
bw.Write(buf, 0, rb)
Loop
End Using
End Using
End Sub
End Class
HttpContextにはRequestプロパティが含まれ、これにはHeadersコレクションが含まれます。それはあなたが必要とするすべての情報でなければなりません。