Convert curl REST call to Invoke-RestMethod in PowerShell

Question

I'm working with the REST API for Gitlab, part currently we need to update one submodule using the API, in curl the process should be something like this:

curl --request PUT -v --header "PRIVATE-TOKEN: XXXXXXXXXX" "http://mygitlab.com/api/v4/projects/1/repository/submodules/MYSUBMODULE" \
  --data "branch=master&commit_sha=6bf09c4a3dc4ca79cbe301e6add06005f38ad9e3&commit_message=Update submodule reference"

And with curl this work without any problem, but we need to do this using PowerShell, we are trying to use Invoke-RestMethod for Powershell 5.1 and according to the documentaion should be something like this:

Invoke-RestMethod -Headers @{"PRIVATE-TOKEN"="$TOKEN"} -Method Put -Uri "http://mygitlab.com/api/v4/projects/1/repository/submodules/MYSUBMODULE" -Body "branch=master&commit_sha=6bf09c4a3dc4ca79cbe301e6add06005f38ad9e3&commit_message=Update submodule reference"

but our result is the following:

Invoke-RestMethod : {"error":"commit_sha is missing, branch is missing"}
At C:\version-manager\release.ps1:67 char:1
+ Invoke-RestMethod -Headers @{"PRIVATE-TOKEN"="$TOKEN"} -Method Put -U ...
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : InvalidOperation: (System.Net.HttpWebRequest:HttpWebRequest) [Invoke-RestMethod], WebException
    + FullyQualifiedErrorId : WebCmdletWebResponseException,Microsoft.PowerShell.Commands.InvokeRestMethodCommand

Please notice is like doesn't get the body, and as far as I know what in curl is --data in PowerShell should be -Body.

Any Idea how to fix this?

Try with -Body @{branch = 'master';commit_sha = '6bf09c4a3dc4ca79cbe301e6add06005f38ad9e3';commit_message = 'Update submodule reference'} — Mathias R. Jessen
– Mathias R. Jessen, Commented Aug 11, 2019 at 15:06

aasanchez · Accepted Answer · 2019-08-16 08:02:46Z

After some research, I found even in the documentation said:

-ContentType

Specifies the content type of the web request.

If this parameter is omitted and the request method is POST, Invoke-RestMethod sets > the content type to "application/x-www-form-urlencoded". Otherwise, the content type > is not specified in the call.

just after specifying the content type in the call as "application/x-www-form-urlencoded", which supposed to be the default value if is not specified, the call works.

The end solution was:

Invoke-RestMethod -Headers @{"PRIVATE-TOKEN"="$TOKEN"} -Method Put -Uri "http://mygitlab.com/api/v4/projects/1/repository/submodules/MYSUBMODULE" -Body "branch=master&commit_sha=6bf09c4a3dc4ca79cbe301e6add06005f38ad9e3&commit_message=Update submodule reference" -ContentType "application/x-www-form-urlencoded"

I hope this help to someone in the future.

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