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Enable more nullable annotations in WebCmdlets#19359

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iSazonov merged 42 commits intoPowerShell:masterfrom
CarloToso:nullable-webcmdlets
Apr 24, 2023
Merged

Enable more nullable annotations in WebCmdlets#19359
iSazonov merged 42 commits intoPowerShell:masterfrom
CarloToso:nullable-webcmdlets

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@CarloToso CarloToso commented Mar 17, 2023 •
edited by iSazonov
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PR Summary

Enable more nullable comments in WebCmdlets, please review carefully.

PR Context

Follow up to #19291

PR Checklist

@CarloToso CarloToso requested a review from PaulHigin as a code owner March 17, 2023 01:32
@ghost ghost assigned anmenaga Mar 17, 2023
@CarloToso CarloToso mentioned this pull request Mar 17, 2023
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@CarloToso @iSazonov
Update src/Microsoft.PowerShell.Commands.Utility/commands/utility/Web…
cfcd17f 
…Cmdlet/Common/ContentHelper.Common.cs

Co-authored-by: Ilya <darpa@yandex.ru>
iSazonov
iSazonov reviewed Mar 30, 2023
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src/Microsoft.PowerShell.Commands.Utility/commands/utility/WebCmdlet/StreamHelper.cs Outdated
bool result = false;
try
{
ArgumentException.ThrowIfNullOrEmpty(characterSet);
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@iSazonov iSazonov Mar 30, 2023 •
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Hmm, I think it is wrong. Encoding.GetEncoding(null) returns OS default but Encoding.GetEncoding(string.Empty) throw. We should investigate the last case and if it is a bug we should fix in another PR.

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@CarloToso CarloToso Mar 30, 2023

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I think the desired behaviour is that both cases (characterSet == null; characterSet == string.Empty) should should return result = false and encoding = UTF8 (the default). Do you agree?

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@iSazonov iSazonov Mar 30, 2023

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The code is in try-catch. So it makes no sense. Please remove.

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@CarloToso CarloToso Mar 30, 2023 •
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I know it doesn't make sense, I added it to avoid a possible null reference error for characterSet, could you point me to a better solution?

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Null reference error? In TryGetEncoding? It is impossible since Encoding.GetEncoding(null) returns OS default, for string.Empty try-catch will catch and set default too. Also it will set default if .Net doesn't know a value in characterSet.

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@CarloToso CarloToso Mar 31, 2023

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The warning before the last 2 commits was Possible null reference argument for parameter 'name' in 'Encoding Encoding.GetEncoding(string name)'., and the build fails on warnings

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Since [System.Text.Encoding]::GetEncoding($null) return OS default without exception I suggest to open new issue in .Net.
Today we could use a workaround with ! operator and comment with reference to the new .Net issue.

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@CarloToso CarloToso Apr 1, 2023 •
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I looked a bit more into it
Test:

$source = @"
using System;
using System.Text;

    public class EncodingTest
    {
        public static Encoding GetEncoding1(string name)
        {
            return Encoding.GetEncoding(name);
        }

        public static Encoding GetEncoding2(int name)
        {
            return Encoding.GetEncoding(name);
        }
    }
"@

Add-Type -TypeDefinition $source -Language CSharp -ReferencedAssemblies netstandard, System.Text.Encoding

[EncodingTest]::GetEncoding1($null)
#--> ERROR
[EncodingTest]::GetEncoding2($null)
#--> windows-1252

[EncodingTest]::GetEncoding1("")
#--> ERROR
[EncodingTest]::GetEncoding2("")
#--> windows-1252
[EncodingTest]::GetEncoding2(0)
#--> windows-1252

In our case we are using Encoding.GetEncoding(string name) so it throws an error with null or empty that gets caught, we don't have a bug everything works as planned. Unfortunalely Encoding.GetEncoding(string name) with null gives us a warning, as you said we could use ! operator.

If Encoding.GetEncoding(string name) with name == null returned windows-1252 that wouldn't be a desired behaviour for us in this case, because we want to default to UTF-8

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CarloToso commented Apr 1, 2023

Unrelated error

@iSazonov iSazonov added the CL-CodeCleanup Indicates that a PR should be marked as a Code Cleanup change in the Change Log label Apr 1, 2023
@iSazonov iSazonov changed the title WebCmdlets more nullable comments Enable more nullable comments in WebCmdlets Apr 1, 2023
@iSazonov iSazonov changed the title Enable more nullable comments in WebCmdlets Enable more nullable annotations in WebCmdlets Apr 1, 2023
@CarloToso CarloToso mentioned this pull request Apr 3, 2023
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This PR has 155 quantified lines of changes. In general, a change size of upto 200 lines is ideal for the best PR experience!

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Label      : Medium
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Total files changed: 14

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@ghost ghost added the Review - Needed The PR is being reviewed label Apr 11, 2023
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ghost commented Apr 11, 2023

This pull request has been automatically marked as Review Needed because it has been there has not been any activity for 7 days.
Maintainer, please provide feedback and/or mark it as Waiting on Author

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CarloToso commented Apr 20, 2023

@iSazonov can you merge this PR?

@iSazonov iSazonov enabled auto-merge (squash) April 22, 2023 18:15
@iSazonov iSazonov disabled auto-merge April 22, 2023 19:06
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iSazonov commented Apr 22, 2023

@CarloToso Please look test fails.

@ghost ghost removed the Review - Needed The PR is being reviewed label Apr 22, 2023
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CarloToso commented Apr 23, 2023

@iSazonov all tests pass

@iSazonov iSazonov merged commit 543b20b into PowerShell:master Apr 24, 2023
@CarloToso CarloToso mentioned this pull request May 5, 2023
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@CarloToso CarloToso deleted the nullable-webcmdlets branch May 22, 2023 17:53
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ghost commented Jun 29, 2023

🎉v7.4.0-preview.4 has been released which incorporates this pull request.:tada:

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@iSazonov iSazonov iSazonov approved these changes

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