invoke-webrequest and invoke-restmethod -headers parameter is more restrictive on PowerShell Core than on PowerShell Native #2895
Description
Im working with an API that seems to not comply with the accepted standard for if-match header (value string must be enclosed in quotes), although this is apparently quite common and is accommodated in native PowerShell iwr/irm. PowerShell core behaves differently and rejects the header when building the request. Modifying the API (commercial product) to comply is not an option unfortunately.
Steps to reproduce
$headers = @{}
$headers.Add("if-match","12345")
Invoke-WebRequest -Uri "http://httpbin.org/headers" -Headers $headersExpected behavior
Works on native PowerShell
Invoke-WebRequest -Uri "http://httpbin.org/headers" -Headers $headers
StatusCode : 200
StatusDescription : OK
Content : {
"headers": {
"Host": "httpbin.org",
"If-Match": "12345",
"User-Agent": "Mozilla/5.0 (Windows NT; Windows NT 10.0; en-AU) WindowsPowerShell/5.1.14393.206"
}
}
RawContent : HTTP/1.1 200 OK
Connection: keep-alive
Access-Control-Allow-Origin: *
Access-Control-Allow-Credentials: true
Content-Length: 182
Content-Type: application/json
Date: Fri, 16 Dec 2016 05:06:38 GM...
Forms : {}
Headers : {[Connection, keep-alive], [Access-Control-Allow-Origin, *], [Access-Control-Allow-Credentials, true], [Content-Length, 182]...}
Images : {}
InputFields : {}
Links : {}
ParsedHtml : mshtml.HTMLDocumentClass
RawContentLength : 182 Actual behavior
Fails on linux
Invoke-WebRequest -Uri "http://httpbin.org/headers" -Headers $headers
Invoke-WebRequest : The format of value '12345' is invalid.
At line:1 char:1
+ Invoke-WebRequest -Uri "http://httpbin.org/headers" -Headers $headers
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : NotSpecified: (:) [Invoke-WebRequest], FormatException
+ FullyQualifiedErrorId : System.FormatException,Microsoft.PowerShell.Commands.InvokeWebRequestCommandNote: enclosing the value in quotes allows the header to be accepted by iwr/irm, but the API I'm attempting to consume from PowerShell Core does not accept the value when enclosed in quotes.
Environment data
Name Value
---- -----
PSVersion 6.0.0-alpha
PSEdition Core
PSCompatibleVersions {1.0, 2.0, 3.0, 4.0...}
BuildVersion 3.0.0.0
GitCommitId v6.0.0-alpha.14
CLRVersion
WSManStackVersion 3.0
PSRemotingProtocolVersion 2.3
SerializationVersion 1.1.0.1