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Honor retry-after and related headers #169

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Honor retry-after and related headers #169

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4f67353
fix retry behavior
trrwilson Jul 12, 2024
b12511b
Merge branch 'main' into user/travisw/auth-header-before-retry
trrwilson Jul 19, 2024
59f313d
scope to just headers
trrwilson Jul 19, 2024
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33 changes: 33 additions & 0 deletions .dotnet/src/Custom/OpenAIClientOptions.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -9,6 +9,11 @@ namespace OpenAI;
[CodeGenModel("OpenAIClientOptions")]
public partial class OpenAIClientOptions : ClientPipelineOptions
{
public OpenAIClientOptions()
{
RetryPolicy = new HeaderInformedRetryPolicy();
}

/// <summary>
/// A non-default base endpoint that clients should use when connecting.
/// </summary>
Expand All @@ -28,4 +33,32 @@ public partial class OpenAIClientOptions : ClientPipelineOptions
/// An optional ID added to OpenAI-Project header
/// </summary>
public string ProjectId { get; init; }

private class HeaderInformedRetryPolicy : ClientRetryPolicy
{
protected override TimeSpan GetNextDelay(PipelineMessage message, int tryCount)
{
TimeSpan? TryGetTimeSpanFromHeader(string headerName, int millisecondsPerValue = 1, bool allowDateTimeOffset = false)
{
if (double.TryParse(
message?.Response?.Headers?.TryGetValue(headerName, out string textValue) == true ? textValue : null,
out double doubleValue) == true)
{
return TimeSpan.FromMilliseconds(millisecondsPerValue * doubleValue);
}
else if (allowDateTimeOffset && DateTimeOffset.TryParse(headerName, out DateTimeOffset delayUntil))
{
return delayUntil - DateTimeOffset.Now;
}
return null;
}

TimeSpan? delayFromHeader =
TryGetTimeSpanFromHeader("retry-after-ms")
?? TryGetTimeSpanFromHeader("x-ms-retry-after-ms")
?? TryGetTimeSpanFromHeader("Retry-After", millisecondsPerValue: 1000, allowDateTimeOffset: true);

return delayFromHeader ?? base.GetNextDelay(message, tryCount);
}
}
}
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