I'd like to email myself a quick dump of a GET request's headers for debugging. I used to be able to do this in classic ASP simply with the Request object, but Request.ToString() doesn't work. And the following code returned an empty string:
using (StreamReader reader = new StreamReader(Request.InputStream))
{
string requestHeaders = reader.ReadToEnd();
// ...
// send requestHeaders here
}
Have a look at the Headers property in the Request object.
C#
string headers = Request.Headers.ToString();
Or, if you want it formatted in some other way:
string headers = String.Empty;
foreach (var key in Request.Headers.AllKeys)
headers += key + "=" + Request.Headers[key] + Environment.NewLine;
VB.NET:
Dim headers = Request.Headers.ToString()
Or:
Dim headers As String = String.Empty
For Each key In Request.Headers.AllKeys
headers &= key & "=" & Request.Headers(key) & Environment.NewLine
Next
Request.Headers.ToString() returns data type name Microsoft.AspNetCore.HttpSys.Internal.RequestHeaders and Request.Headers has no AllKeys member.You could turn on tracing on the page to see headers, cookies, form variables, querystring etc painlessly:
Top line of the aspx starting:
<%@ Page Language="C#" Trace="true"
<deployment retail=true /> is typically used in production web servers in machine.config you can read more about config values inheritance from here msdn.microsoft.com/en-us/library/ms178685.aspxasp.net core spits out Microsoft.AspNetCore.HttpSys.Internal.RequestHeaders
for Request.Headers.ToString(), so the solution in that context is:
IEnumerable<string> keyValues = context.Request.Headers.Keys.Select(key => key + ": " + string.Join(",", context.Request.Headers[key]));
string requestHeaders = string.Join(System.Environment.NewLine, keyValues);
For those (like me) having troubles with the absence of AllKeys property in IHeaderDictionary implementation, this is the way I was able to serialize all headers in a string (inside a controller action).
using System;
using System.Text;
// ...
var builder = new StringBuilder(Environment.NewLine);
foreach (var header in Request.Headers)
{
builder.AppendLine($"{header.Key}: {header.Value}");
}
var headersDump = builder.ToString();
I'm using ASP.NET Core 3.1.
.Net 6.0 and above:
public virtual IActionResult Headers()
{
System.Text.StringBuilder sb = new();
foreach (var header in _httpContext.HttpContext.Request.Headers)
{
sb.Append(header.Key);
sb.Append("=");
sb.AppendLine(header.Value);
}
return Ok(sb.ToString());
}
You can use,
string headers = Request.Headers.ToString();
But It will return URL encoded string so to decode it use below code,
String headers = HttpUtility.UrlDecode(Request.Headers.ToString())
Microsoft.AspNetCore.HttpSys.Internal.RequestHeaders instead of actual headers.You can get all headers as string() in one shot, using this (VB.Net)
Request.Headers.ToString.Split(New String() {vbCrLf}, StringSplitOptions.RemoveEmptyEntries)
