Set the Host Header when using invoke-restmethod

Question

For some reason this doesn't work

Invoke-RestMethod -Uri "http://localhost" -Headers @{"Host"="web.domain.com"}

I get the error

The 'Host' header must be modified using the appropriate property or method

But I can't find the method or property on how to do this.

Thanks

What version of powershell are you using? Your tags says 2.0, but I don't believe Invoke-RestMethod was added until 3.0. I was able to use the exact command you provided above without error on Powershell 4.0 on Windows 8.1. — Alex
– Alex, Commented Nov 12, 2013 at 19:26

Keith Hill · Accepted Answer · 2013-11-13 06:06:44Z

20

This is a bug that has been fixed in PowerShell version 4.0:

C:\PS> (irm http://localhost -Headers @{Host='web.domain.com'}).html

xmlns                                   head                                    body
-----                                   ----                                    ----
http://www.w3.org/1999/xhtml            head                                    body

answered Nov 13, 2013 at 6:06

Keith Hill

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2 Comments

The Muffin Man Over a year ago

So what's the work around? I see the table that you pasted, but I'm not sure what I'm really looking at.

Keith Hill Over a year ago

This is just showing that the OP's command works in PowerShell V4 by showing the "HTML" returned by the request. In tabular format, this is just showing the XML namespace decl and the head and body element tags.

Antony Denyer · Accepted Answer · 2015-11-05 12:38:36Z

7

For the record I worked round the issue using WebRequest

$bytes = [system.Text.Encoding]::UTF8.GetBytes("key=value")
$web = [net.WebRequest]::Create("http://localhost") -as [net.HttpWebRequest]
$web.ContentType = "application/x-www-form-urlencoded"
$web.Host = "web.domain.com"
$web.Method = "POST"
$web.ContentLength = $bytes.Length
$stream = $web.GetRequestStream()
$stream.Write($bytes,0,$bytes.Length)

edited Nov 5, 2015 at 12:38

answered Nov 13, 2013 at 14:23

Antony Denyer

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2 Comments

irl_irl Over a year ago

With this do you ever see the error "You must write ContentLength bytes to the request stream before calling [Begin]GetResponse"?

ListenSoftware Louise Ai Agent Over a year ago

I am trying to create the header for cloudflare. I am not able to determine the host and keep getting a 421 misdirected request

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