How can I use Powershell to access a restful webservice?
Solution 1
What you want is PowerShell 3 and its Invoke-RestMethod, ConvertTo-Json, and ConvertFrom-Json cmdlets. Your code will end up looking like:
$stuff = invoke-RestMethod -Uri $url -Method Get;
and there shouldn't even be a need to invoke ConvertFrom-Json on the resulting $stuff => it's already in a usable non-string format.
As for POSTs|PUTs, simply use PowerShell hashes and arrays to structure your data and then call ConvertTo-Json on it before passing it to invoke-RestMethod or invoke-WebRequest:
invoke-WebRequest -Uri $url -ContentType application/json -Method Post -Body $objectConvertedToJson
See http://technet.microsoft.com/en-us/Library/hh849971.aspx for details.
Solution 2
You could use DataContractJsonSerializer, which is a part of standard .Net library.
Solution 3
@Jaykul wrote a nice set of RESTful functions that are part of his Mindtouch dreamwiki script over here: http://poshcode.org/691
Comments
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reconbot over 3 years
I need to integrate an existing powershell script to update it's status via a restful web service that returns json. I'm a bit new to powershell but I was able to find the System.Net.WebRequest object do something like the following.
$a = [System.Net.WebRequest]::Create("http://intranet/service/object/") $a.Method = "GET" $a.GetResponse()
which returns a json array of objects
[ {id:1}, {id:2}] // etc
I'm not sure where to go from here and how to parse this into a native datatype. I'd like to be able to post and delete as well.
Any pointers? And are there any json/rest libraries or command-lets?
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reconbot over 11 yearsYou are completely correct however powershell 3 is still pretty new and not deployed where I work.