CodexBloom - Programming Q&A Platform

PowerShell 7.3 - Trouble with Creating a Custom Module to Interact with REST APIs and Handling Authentication

๐Ÿ‘€ Views: 287 ๐Ÿ’ฌ Answers: 1 ๐Ÿ“… Created: 2025-06-11
PowerShell REST API

After trying multiple solutions online, I still can't figure this out. I tried several approaches but none seem to work. I'm converting an old project and This might be a silly question, but I'm trying to create a PowerShell module in version 7.3 that interacts with a REST API, but I'm having trouble with handling the authentication process and properly returning the data..... I've set up the basic structure of the module, and I'm using `Invoke-RestMethod` to make calls to the API. My aim is to authenticate using a Bearer token, but I keep running into issues with the headers not being set correctly. Hereโ€™s a snippet of my code: ```powershell function Get-ApiData { param ( [string]$url, [string]$token ) $headers = @{ "Authorization" = "Bearer $token" "Content-Type" = "application/json" } try { $response = Invoke-RestMethod -Uri $url -Method Get -Headers $headers return $response } catch { Write-behavior "Failed to get data: $_" } } ``` When I call this function like so: ```powershell $token = "my_secret_token" $url = "https://api.example.com/data" Get-ApiData -url $url -token $token ``` I receive the following behavior message: ``` Failed to get data: Invoke-RestMethod : The remote server returned an behavior: (401) Unauthorized. ``` Iโ€™ve verified that the token is valid by testing it with Postman. I've also tried adding verbose logging to see the actual request being sent, and the Authorization header seems to be set correctly. One thing I noticed is that the API requires a specific User-Agent header, which I'm not currently including. Should I add this to my headers? Additionally, Iโ€™m wondering if thereโ€™s a better approach for managing the token retrieval and expiration, especially if I need to make multiple calls in a session. Any insights would be greatly appreciated! I'm working on a web app that needs to handle this. Any help would be greatly appreciated! Has anyone else encountered this? My development environment is CentOS. Hoping someone can shed some light on this. I'm using Powershell 3.11 in this project. Has anyone else encountered this? The stack includes Powershell and several other technologies. I appreciate any insights!