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WebCmdlets get Retry-After from headers if StatusCode is 429 #18717

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Merged
iSazonov merged 11 commits into from
Dec 14, 2022
Merged

WebCmdlets get Retry-After from headers if StatusCode is 429 #18717

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6d963d2
Retry-After from headers if StatusCode is 429
CarloToso Dec 3, 2022
9713370
convert if-else to ternary operator
CarloToso Dec 3, 2022
1a4940a
use explicit type; fix Convert.ToInt32
CarloToso Dec 3, 2022
bc97fe3
Removed redundant code
CarloToso Dec 3, 2022
d204322
define local variable instead of WebSession.RetryIntervalInSeconds
CarloToso Dec 5, 2022
69e322d
R -> r
CarloToso Dec 5, 2022
59df9aa
remove linq; go back to if-else; try-catch
CarloToso Dec 6, 2022
5cf9233
Merge branch 'PowerShell:master' into WebCmdlets-respect-Retry-After-…
CarloToso Dec 6, 2022
32b455a
revert to using websession
CarloToso Dec 6, 2022
3d5757c
Update with suggestion
CarloToso Dec 6, 2022
6da6641
remove (int)
CarloToso Dec 6, 2022
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26 changes: 23 additions & 3 deletions 26 ...owerShell.Commands.Utility/commands/utility/WebCmdlet/Common/WebRequestPSCmdlet.Common.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -690,7 +690,7 @@ internal virtual void PrepareSession()
{
WebSession.MaximumRetryCount = MaximumRetryCount;

// only set retry interval if retry count is set.
// Only set retry interval if retry count is set.
WebSession.RetryIntervalInSeconds = RetryIntervalSec;
}
}
Expand Down Expand Up @@ -1439,16 +1439,36 @@ internal virtual HttpResponseMessage GetResponse(HttpClient client, HttpRequestM
// When MaximumRetryCount is not specified, the totalRequests == 1.
if (totalRequests > 1 && ShouldRetry(response.StatusCode))
{
int retryIntervalInSeconds = WebSession.RetryIntervalInSeconds;

// If the status code is 429 get the retry interval from the Headers.
// Ignore broken header and its value.
if (response.StatusCode is HttpStatusCode.Conflict && response.Headers.TryGetValues(HttpKnownHeaderNames.RetryAfter, out IEnumerable<string> retryAfter))
{
try
{
IEnumerator<string> enumerator = retryAfter.GetEnumerator();
if (enumerator.MoveNext())
{
retryIntervalInSeconds = Convert.ToInt32(enumerator.Current);
}
}
catch
{
// Ignore broken header.
}
}

string retryMessage = string.Format(
CultureInfo.CurrentCulture,
WebCmdletStrings.RetryVerboseMsg,
RetryIntervalSec,
retryIntervalInSeconds,
response.StatusCode);

WriteVerbose(retryMessage);

_cancelToken = new CancellationTokenSource();
Task.Delay(WebSession.RetryIntervalInSeconds * 1000, _cancelToken.Token).GetAwaiter().GetResult();
Task.Delay(retryIntervalInSeconds * 1000, _cancelToken.Token).GetAwaiter().GetResult();
_cancelToken.Cancel();
_cancelToken = null;

Expand Down
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