How to shorten URL with Bitly V4 API using PowerShell?

Question

I currently use the below PowerShell script to shorten any URL via the Bitly V3 API. I am hoping someone can help to do the same thing using the Bitly V4 API.

function New-ShortURL {
    param (
            [Parameter(Position=0, Mandatory=$true, ValueFromPipeline=$True, ValueFromPipelineByPropertyName=$True)]
            $URL
        )
    #https://app.bitly.com API
    $OAuthToken = "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"
    $MyURL=Invoke-WebRequest -Uri https://api-ssl.bitly.com/v3/shorten -Body @{access_token=$OAuthToken;longURL=$URL} -Method Get
    $MyURLjson = $MyURL.Content | convertfrom-json
    $MyURLjson.data.url
}

have you read the documentation on how to migrate from v3 to v4? — Jawad
– Jawad, Commented Feb 26, 2020 at 16:43

Jawad · Accepted Answer · 2020-02-26 21:29:37Z

2

Reading through the documentation on changes to v4, it states,

Previous versions of the API used a query parameter to submit the token. This is no longer applicable in v4.0. Tokens should be made using the OAuth Bearer Token specification, using the Authorization header in the request.

What that means is, you cant do this,

$body = @{access_token=$OAuthToken;longURL=$URL}

instead, you have to put the access token in the header of your request.

$header = @{Authorization = "Bearer $OAuthToken"

And the method ... seems to be POST instead of GET.

Your request should look something like this,

$body = @{long_url= "https://stackoverflow.com/questions/60418169/how-to-shorten-url-with-bitly-v4-api-using-powershell?noredirect=1#comment106889121_60418169"} | convertto-json

$OAuthToken = "=========="
$header = @{Authorization="Bearer $OAuthToken"; Accept="application/json"; "Content-Type"="application/json"}

$MyURL=Invoke-WebRequest -Uri https://api-ssl.bitly.com/v4/shorten -Body $body -header $header -Method Post
$MyURLjson = $MyURL.Content | ConvertFrom-Json
$MyURLjson.link

answered Feb 26, 2020 at 21:29

Jawad

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4 Comments

MKANET Over a year ago

I just tried that script using my API token from V3. However, it doesnt return a shortened link. It says "forbidden". I need to know how to generate the OAuth2 token for this script.

Jawad Over a year ago

Use the link to documentation I gave to see how to get the auth token. You use the same call but use -credential switch to retrieve auth token

MKANET Over a year ago

Thank you. I was able to generate a generic API token which worked with your script. I was worried I "HAD" to use an API client key + client secret just to generate the OAuth2 token each time.

Jawad Over a year ago

Client key and secret are listed as optional.

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