Add -SkipHeaderValidation switch to Invoke-WebRequest and Invoke-RestMethod to support adding headers without validating the header value. by dantraMSFT · Pull Request #4085 · PowerShell/PowerShell

dantraMSFT · 2017-06-22T22:58:12Z

Some sites require header values that do not conform to strict validation in the CoreCLR's HttpRequestMessage.Headers collection causing calls to Invoke-WebRequest and Invoke-RestMethod to fail with a FormatException.

This change adds a -SkipHeaderValidation switch that allows the headers to be added without validation.

See PR MicrosoftDocs/PowerShell-Docs#1387 for the associated doc change.

SteveL-MSFT · 2017-06-23T00:54:37Z

You need to rebase and only include the commits for this PR

dantraMSFT · 2017-06-23T16:19:14Z

Rebased.

SteveL-MSFT · 2017-06-23T17:26:47Z

test/powershell/Modules/Microsoft.PowerShell.Utility/WebCmdlets.Tests.ps1

Looks like you accidentally added whitespace

I updated the file and removed all trailing whitespace per the using-vscode.md to get the file to a 'clean' state.
note that when I diff my version against powershell/master, the only whitespace difference I see is at line 172 where trailing whitespace was removed. I don't see any of the other whitespace differences that the online diff viewer is reporting.

Local and online diff sometimes surprise us.
Here may be a real difference in 'rn' and ``n`.

SteveL-MSFT · 2017-06-23T17:28:53Z

test/powershell/Modules/Microsoft.PowerShell.Utility/WebCmdlets.Tests.ps1

Use the ShouldBeErrorId pattern https://github.com/PowerShell/PowerShell/search?utf8=%E2%9C%93&q=ShouldBeErrorId&type=

I can't use ShouldBeErrorId for those statements; it expects a ScriptBlock to execute and throw an exception.

SteveL-MSFT · 2017-06-23T17:29:08Z

test/powershell/Modules/Microsoft.PowerShell.Utility/WebCmdlets.Tests.ps1

Use the ShouldBeErrorId pattern

ShouldBeErrorId does not work here; it expects a script block and then catches the exception to verify the error id.

SteveL-MSFT · 2017-06-23T17:30:12Z

test/tools/Modules/HttpListener/HttpListener.psm1

"echo" doesn't seem to be necessary as "response" basically does the same thing. I would suggest updating "response" if you want json (perhaps based on "contenttype"

Changing "response" to use JSON for the output breaks many tests. I will update the comment for echo but won't change response at this time.

I'm not suggesting always return json. "response" takes a contenttype argument you can use.

I think it makes more sense to have a separate 'echo' test. The returned data for response would be very different; it currently doesn't echo the request, and using contentype to control that doesn't make sense to me.

dantraMSFT · 2017-07-05T16:26:53Z

@TravisEz13 please merge this PR.

TravisEz13 · 2017-07-07T21:55:22Z

@dantraMSFT Please resolve merge conflicts

…Method to support adding headers without validating the header value.

dantraMSFT · 2017-07-10T17:19:35Z

@TravisEz13: Conflicts resolved.

TravisEz13 · 2017-07-11T18:37:11Z

@dantraMSFT You used an "email address" to commit which is not associated with your GitHub account. Please add the association.
@SteveL-MSFT I'm removing your approval since the PR has changed.

PR has change

dantraMSFT · 2017-07-11T18:44:34Z

@SteveL-MSFT, please reapprove this PR.

dantraMSFT · 2017-07-12T23:06:55Z

@TravisEz13: Can you look at this? Steve is out until next week.

iSazonov · 2017-07-13T05:49:47Z

test/powershell/Modules/Microsoft.PowerShell.Utility/WebCmdlets.Tests.ps1

+        $headers = @{"If-Match" = "*"}
+        $response = ExecuteRequestWithCustomHeaders -Uri "http://localhost:8080/PowerShell?test=echo" -headers $headers
+
+        $response.Error | Should BeNullOrEmpty


We can remove this - next line makes the check.

The check is intentional. Checking for $result.Error provides a better failure id if the underlying request fails versus the NullReferenceException that would occur in the next statement.

I believe NullReferenceException would occur only if we call a method but we call a property.

You're right but the end result does not change. If the request does not complete successfully, I want to know that. Testing the content doesn't help me diagnose that and, in fact, obfuscates it.

Thanks for clarify!

iSazonov · 2017-07-13T05:50:01Z

test/powershell/Modules/Microsoft.PowerShell.Utility/WebCmdlets.Tests.ps1

+        $headers = @{"If-Match" = "12345"}
+        $response = ExecuteRequestWithCustomHeaders -Uri "http://localhost:8080/PowerShell?test=echo" -headers $headers
+
+        $response.Error | Should Not BeNullOrEmpty


The check is intentional. Checking for $result.Error provides a better failure id if the underlying request fails versus the NullReferenceException that would occur in the next statement.

iSazonov · 2017-07-13T05:50:20Z

test/powershell/Modules/Microsoft.PowerShell.Utility/WebCmdlets.Tests.ps1

+        $headers = @{"If-Match" = "12345"}
+        $response = ExecuteRequestWithCustomHeaders -Uri "http://localhost:8080/PowerShell?test=echo" -headers $headers -SkipHeaderValidation
+
+        $response.Error | Should BeNullOrEmpty


The check is intentional. Checking for $result.Error provides a better failure id if the underlying request fails versus the NullReferenceException that would occur in the next statement.

iSazonov · 2017-07-13T05:50:33Z

test/powershell/Modules/Microsoft.PowerShell.Utility/WebCmdlets.Tests.ps1

+        $headers = @{"If-Match" = "*"}
+        $response = ExecuteRequestWithCustomHeaders -Uri "http://localhost:8081/PowerShell?test=echo" -headers $headers -Cmdlet "Invoke-RestMethod"
+
+        $response.Error | Should BeNullOrEmpty


iSazonov · 2017-07-13T05:50:43Z

test/powershell/Modules/Microsoft.PowerShell.Utility/WebCmdlets.Tests.ps1

+        $headers = @{"If-Match" = "12345"}
+        $response = ExecuteRequestWithCustomHeaders -Uri "http://localhost:8081/PowerShell?test=echo" -headers $headers -Cmdlet "Invoke-RestMethod"
+
+        $response.Error | Should Not BeNullOrEmpty


The check is intentional. Checking for $result.Error provides a better failure id if the underlying request fails versus the NullReferenceException that would occur in the next statement.

iSazonov · 2017-07-13T05:56:48Z

test/powershell/Modules/Microsoft.PowerShell.Utility/WebCmdlets.Tests.ps1

+        $headers = @{"If-Match" = "12345"}
+        $response = ExecuteRequestWithCustomHeaders -Uri "http://localhost:8081/PowerShell?test=echo" -headers $headers -SkipHeaderValidation -Cmdlet "Invoke-RestMethod"
+
+        $response.Error | Should BeNullOrEmpty


The check is intentional. Checking for $result.Error provides a better failure id if the underlying request fails versus the NullReferenceException that would occur in the next statement.

TravisEz13 · 2017-07-14T17:24:33Z

Thanks everyone

msftclas added the cla-not-required label Jun 22, 2017

SteveL-MSFT requested changes Jun 23, 2017

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SteveL-MSFT previously approved these changes Jun 23, 2017

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mirichmo assigned TravisEz13 Jun 28, 2017

dantraMSFT closed this Jul 5, 2017

dantraMSFT reopened this Jul 5, 2017

msftclas added the cla-not-required label Jul 5, 2017

dantraMSFT and others added 2 commits July 7, 2017 15:38

Add -SkipHeaderValidation switch to Invoke-WebRequest and Invoke-Rest…

7f5c3aa

…Method to support adding headers without validating the header value.

Fix whitespace

5603a73

iSazonov reviewed Jul 13, 2017

View reviewed changes

TravisEz13 added the WG-Cmdlets-Utility cmdlets in the Microsoft.PowerShell.Utility module label Jul 14, 2017

TravisEz13 merged commit ea758a5 into PowerShell:master Jul 14, 2017

dantraMSFT deleted the dantra/issue2895 branch July 14, 2017 17:45

markekraus mentioned this pull request Aug 3, 2017

Extend -SkipHeaderValidation to include -UserAgent to support non-standard User-Agent headers #4479

Merged

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dantraMSFT commented Jul 5, 2017

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dantraMSFT commented Jun 22, 2017 •

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