我正在根据此link中的代码编写一个网络服务器。我试图从表单中获取POST数据但是我 我无法获取这些数据。网络服务器应该是自托管的。它基本上是一个控制面板，我可以添加和编辑这些称为堆栈灯的设备。这是我的WebServer.Run方法：
public void Run()
{
ThreadPool.QueueUserWorkItem((o) =>
{
Console.WriteLine("StackLight Web Server is running...");
try
{
while (_listener.IsListening)
{
ThreadPool.QueueUserWorkItem((c) =>
{
var ctx = c as HttpListenerContext;
try
{
// set the content type
ctx.Response.Headers[HttpResponseHeader.ContentType] = SetContentType(ctx.Request.RawUrl);
WebServerRequestData data = _responderMethod(ctx.Request);
string post = "";
if(ctx.Request.HttpMethod == "POST")
{
using(System.IO.StreamReader reader = new StreamReader(ctx.Request.InputStream, ctx.Request.ContentEncoding))
{
post = reader.ReadToEnd();
}
}
if(data.ContentType.Contains("text") || data.ContentType.Equals("application/json"))
{
// serve text/html,css,js & application/json files as UTF8
// images don't need to be served as UTF8, they don't have encodings
char[] chars = new char[data.Content.Length / sizeof(char)];
System.Buffer.BlockCopy(data.Content, 0, chars, 0, data.Content.Length);
string res = new string(chars);
data.Content = Encoding.UTF8.GetBytes(res);
}
// this writes the html out from the byte array
ctx.Response.ContentLength64 = data.Content.Length;
ctx.Response.OutputStream.Write(data.Content, 0, data.Content.Length);
}
catch (Exception ex)
{
ConfigLogger.Instance.LogCritical(LogCategory, ex);
}
finally
{
ctx.Response.OutputStream.Close();
ctx.Response.Close();
}
}, _listener.GetContext());
}
}
catch (Exception ex)
{
ConfigLogger.Instance.LogCritical(LogCategory, ex);
}
});
}
我正在使用一个名为WebServerRequestData的类来获取我的页面，css，javascript和图像，以便我可以为它们提供服务。该课程如下：
public class WebServerRequestData
{
// Raw URL from the request object
public string RawUrl { get; set; }
// Content Type of the file
public string ContentType { get; set; }
// A byte array containing the content you need to serve
public byte[] Content { get; set; }
public WebServerRequestData(string data, string contentType, string rawUrl)
{
this.ContentType = contentType;
this.RawUrl = rawUrl;
byte[] bytes = new byte[data.Length * sizeof(char)];
System.Buffer.BlockCopy(data.ToCharArray(), 0, bytes, 0, bytes.Length);
this.Content = bytes;
}
public WebServerRequestData(byte[] data, string contentType, string rawUrl)
{
this.ContentType = contentType;
this.RawUrl = rawUrl;
this.Content = data;
}
}
这是我的表格：
public static string EditStackLightPage(HttpListenerRequest request)
{
// PageHeadContent writes the <html><head>...</head> stuf
string stackLightPage = PageHeadContent();
// start of the main container
stackLightPage += ContainerDivStart;
string[] req = request.RawUrl.Split('/');
StackLightDevice stackLight = Program.StackLights.First(x => x.Name == req[2]);
stackLightPage += string.Format("<form action='/edit/{0}/update' method='post' enctype='multipart/form-data'>", stackLight.Name);
stackLightPage += string.Format("Stack Light<input type='text' id='inputName' value='{0}'>", stackLight.Name);
stackLightPage += string.Format("IP Address<input type='text' id='inputIp' value='{0}'>", stackLight.Ip);
stackLightPage += string.Format("Port Number<input type='text' id='inputPort' value='{0}'>", stackLight.Port);
stackLightPage += "<button type='submit'>Update</button>";
stackLightPage += "</form>";
// end of the main container
stackLightPage += ContainerDivEnd;
stackLightPage += PageFooterContent();
return stackLightPage;
}
它只有3个字段：name，ip＆amp;写入某些安全灯的自定义类的端口。它是从另一个类的SendResponse方法调用的。
private static WebServerRequestData SendResponse(HttpListenerRequest request)
这是我的表单被调用的片段，编辑网址的示例为localhost:8080/edit/stackLight-Name，更新为localhost:8080/edit/stackLight-Name/update。这是检查rawurl是否包含这些路由的代码：
if(request.RawUrl.Contains("edit"))
{
if (request.RawUrl.Contains("update"))
{
// get form data from the edit page and return to the edit
_resultString = WebServerHtmlContent.EditStackLightPage(request);
_data = new WebServerRequestData(_resultString, "text/html", request.RawUrl);
return _data;
}
_resultString = WebServerHtmlContent.EditStackLightPage(request);
_data = new WebServerRequestData(_resultString, "text/html", request.RawUrl);
return _data;
}
这是我处理请求的地方。它基于HttpListenerRequest对象的RawUrl属性得到了一些if语句。我正在尝试获取表单数据。在以下部分：
if(ctx.Request.HttpMethod == "POST")
{
using(System.IO.StreamReader reader = new StreamReader(ctx.Request.InputStream, ctx.Request.ContentEncoding))
{
post = reader.ReadToEnd();
}
}
我能够获得一个InputStream，但我没有得到表单数据。这是我得到的数据："------WebKitFormBoundaryAGo7VbCZ2YC79zci--\r\n"
输入流是否应该包含我的表单数据？
我没有看到InputStream中表单字段中的任何数据。我尝试过使用application/x-www-form-urlencoded但是从ctx.Request返回一个null InputStream。 （ctx是我的HttpListenerContext对象）。
我读到了关于使用multipartform和application / x-www-form-urlencoded并尝试过它们。
到目前为止，多部分表单为我提供了数据（即使它不是表单数据），而另一部分则没有。
我认为我已经接近让我的表单数据出现了，我只是坚持这一点。我不知道该怎么做。
此外，我现在正在stackoverflow
上阅读此类似文章修改 从该链接读取后，我已将我的Web服务器运行方法更改为以下内容：
try
{
// set the content type
WebServerRequestData data = _responderMethod(ctx.Request);
string post = "";
if(ctx.Request.HttpMethod == "POST")
{
data.ContentType = ctx.Request.ContentType;
post = GetRequestPostData(ctx.Request);
}
ctx.Response.ContentLength64 = data.OutputBuffer.Length;
ctx.Response.OutputStream.Write(data.OutputBuffer, 0, data.OutputBuffer.Length);
}
这是方法GetRequestPostData（）：
private static string GetRequestPostData(HttpListenerRequest request)
{
if (!request.HasEntityBody)
return null;
using(System.IO.Stream body = request.InputStream)
{
using(System.IO.StreamReader reader = new StreamReader(body, request.ContentEncoding))
{
return reader.ReadToEnd();
}
}
}
我仍然只是"------WebKitFormBoundaryjiSulPEnvWX7MIeq--\r\n"
答案 0 :(得分：0)
我已经弄明白了，我忘了在表格字段中添加一个名字。
public static string EditStackLightPage(HttpListenerRequest request)
{
// PageHeadContent writes the <html><head>...</head> stuf
string stackLightPage = PageHeadContent();
// start of the main container
stackLightPage += ContainerDivStart;
string[] req = request.RawUrl.Split('/');
StackLightDevice stackLight = Program.StackLights.First(x => x.Name == req[2]);
stackLightPage += string.Format("<div class='col-md-8'><form action='/edit/{0}/update' class='form-horizontal' method='post' enctype='multipart/form-data'>", stackLight.Name);
stackLightPage += string.Format("<fieldset disabled><div class='form-group'><label for='inputName' class='control-label col-xs-4'>Stack Light</label><div class='col-xs-8'><input type='text' class='form-control' id='inputName' name='inputName' value='{0}'></div></div></fieldset>", stackLight.Name);
stackLightPage += string.Format("<div class='form-group'><label for='inputIp' class='control-label col-xs-4'>IP Address</label><div class='col-xs-8'><input type='text' class='form-control' id='inputIp' name='inputIp' value='{0}'></div></div>", stackLight.Ip);
stackLightPage += string.Format("<div class='form-group'><label for='inputPort' class='control-label col-xs-4'>Port Number</label><div class='col-xs-8'><input type='text' class='form-control' id='inputPort' name='inputPort' value='{0}'></div></div>", stackLight.Port);
stackLightPage += "<div class='form-group'><div class='col-xs-offset-4 col-xs-8'><button type='submit' class='btn btn-inverse'>Update</button></div></div>";
stackLightPage += "</form></div>";
// end of the main container
stackLightPage += ContainerDivEnd;
stackLightPage += PageFooterContent();
return stackLightPage;
}