MS PowerBI Rest error: Invoke-RestMethod : The 'Content-Type' header must be modified

[NancyAb]

Hi,

I have PowerBI setup with a gateway and have been able to refresh the datasource using the MS tools.

I have customized the ps1 program with my company's settings and have installed the PowerShell tools.

When I run the manageRefresh.ps1 command, I get the errors:

Invoke-RestMethod : The 'Content-Type' header must be modified using the appropriate property or method.
Parameter name: name
At C:\temp\manageRefresh.ps1:78 char:1
+ Invoke-RestMethod -Uri $uri -Headers $authHeader -Method POST -Verbose
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : NotSpecified: (:) [Invoke-RestMethod], ArgumentException
    + FullyQualifiedErrorId : System.ArgumentException,Microsoft.PowerShell.Commands.InvokeRestMethodCommand

Invoke-RestMethod : The 'Content-Type' header must be modified using the appropriate property or method.
Parameter name: name
At C:\temp\manageRefresh.ps1:82 char:1
+ Invoke-RestMethod -Uri $uri -Headers $authHeader -Method GET -Verbose
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : NotSpecified: (:) [Invoke-RestMethod], ArgumentException
    + FullyQualifiedErrorId : System.ArgumentException,Microsoft.PowerShell.Commands.InvokeRestMethodCommand

Any ideas? Thanks in advance for looking. Nancy.

[BrightKnight6]

I am getting a similar error:

Invoke-RestMethod : A positional parameter cannot be found that accepts argument 'â€Headers
System.Collections.Hashtable â€Method'.
At \PowerBI_Powershell_Script\Updated_Powershell_Script.ps1:119 char:1
+ Invoke-RestMethod -Uri $uri –Headers $authHeader –Method POST – ...
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : InvalidArgument: (:) [Invoke-RestMethod], ParameterBindingException
    + FullyQualifiedErrorId : PositionalParameterNotFound,Microsoft.PowerShell.Commands.InvokeRestMethodCommand

[BrightKnight6]

@NancyAb

I was getting the same error and these updates made my code work:
$authHeader = @{ Authorization=$token.CreateAuthorizationHeader() Content='application/json' }

and I believe the sample code mixes long and short dashes which was giving me an error as well so here is the modified code for that:
Invoke-RestMethod -Uri $uri -Headers $authHeader -Method POST -Verbose

[NancyAb]

Thanks so much. I will have a look. Nancy.

[sjt003001]

Hi,

I had the same issue and got an error with BrightKnight6 code too, but adding single quotes around Authorization and Content seemed to do the trick. So the key difference between the original and this is Content instead of Content-Type. I'm a newbie to all the concepts here so can't really explain why.

This is what I ended up with:

$authHeader = @{
'Authorization'=$token.CreateAuthorizationHeader()
'Content'='application/json'
}

Scott

[CorinnaAdkins]

I consistently receive the error below and my dataset does not refresh, any help would be appreciated.
"
Invoke-RestMethod : The remote server returned an error: (400) Bad Request.
At line:85 char:1

• Invoke-RestMethod -Uri $uri –Headers $authHeader –Method POST –Verbose

•   + CategoryInfo          : InvalidOperation: (System.Net.HttpWebRequest:HttpWebRequest) [Invoke-RestMethod], WebException
    + FullyQualifiedErrorId : WebCmdletWebResponseException,Microsoft.PowerShell.Commands.InvokeRestMethodCommand
  
  

VERBOSE: GET https://api.powerbi.com/v1.0/myorg/datasets/$datasetId/refreshes with 0-byte payload

[ashu16815]

HI All,

I am also getting :
PS C:\temp> .\sample.ps1
[Microsoft.IdentityModel.Clients.ActiveDirectory.AuthenticationResult
System.Collections.Hashtable
Invoke-RestMethod : A positional parameter cannot be found that accepts argument 'â?Headers
System.Collections.Hashtable â?Method'.
At C:\temp\sample.ps1:78 char:1

• Invoke-RestMethod -Uri $uri â?"Headers $authHeader â?"Method POST â?"Verbose

•   + CategoryInfo          : InvalidArgument: (:) [Invoke-RestMethod], ParameterBindingException
    + FullyQualifiedErrorId : PositionalParameterNotFound,Microsoft.PowerShell.Commands.InvokeRestMethodCommand](url)
  
  

I tried all changes mentioned above but nothing worked. Please help

[chadtoney]

I'm also getting similar error:

Invoke-RestMethod : A positional parameter cannot be found that accepts argument 'â€Headers System.Collections.Hashtable â€Method'.
At C:\Users\toneyc\Downloads\copyWorkspace.ps1:76 char:16

• ... l_groups = (Invoke-RestMethod -Uri $uri –Headers $auth_header –Me ...

•             ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  

  • CategoryInfo : InvalidArgument: (:) [Invoke-RestMethod], ParameterBindingException
  • FullyQualifiedErrorId : PositionalParameterNotFound,Microsoft.PowerShell.Commands.InvokeRestMethodCommand

[nickodemis99]

HI All,

I am also getting :
PS C:\temp> .\sample.ps1
[Microsoft.IdentityModel.Clients.ActiveDirectory.AuthenticationResult
System.Collections.Hashtable
Invoke-RestMethod : A positional parameter cannot be found that accepts argument 'â?Headers
System.Collections.Hashtable â?Method'.
At C:\temp\sample.ps1:78 char:1

• Invoke-RestMethod -Uri $uri â?"Headers $authHeader â?"Method POST â?"Verbose

•   + CategoryInfo          : InvalidArgument: (:) [Invoke-RestMethod], ParameterBindingException
    + FullyQualifiedErrorId : PositionalParameterNotFound,Microsoft.PowerShell.Commands.InvokeRestMethodCommand](url)
  

I tried all changes mentioned above but nothing worked. Please help

You need to save you code to file that is not UTC. More than likely you copied code from a webpage and it include special characters that need to be removed.

You can always delete the problem line and retype it manually.

[Shailevy]

+1

Tried all suggestions and nothing worked.

@nickodemis99 The file was download via git, not a web browser