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Fixes creating .csv file in OpenAIUsageDebuggingPlugin. Closes #1460 #1463

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Merged
waldekmastykarz merged 1 commit into from
Dec 1, 2025
Merged

Fixes creating .csv file in OpenAIUsageDebuggingPlugin. Closes #1460 #1463

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20 changes: 6 additions & 14 deletions DevProxy.Plugins/Inspection/OpenAIUsageDebuggingPlugin.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -49,20 +49,6 @@ public sealed class OpenAIUsageDebuggingPlugin(

private readonly string outputFileName = $"devproxy_llmusage_{DateTime.Now:yyyyMMddHHmmss}.csv";

public override async Task InitializeAsync(InitArgs e, CancellationToken cancellationToken)
{
Logger.LogTrace("{Method} called", nameof(InitializeAsync));

ArgumentNullException.ThrowIfNull(e);

if (!File.Exists(outputFileName))
{
await File.AppendAllLinesAsync(outputFileName, [UsageRecord.GetHeader()], cancellationToken);
}

Logger.LogTrace("{Method} finished", nameof(InitializeAsync));
}

public override async Task AfterResponseAsync(ProxyResponseArgs e, CancellationToken cancellationToken)
{
Logger.LogTrace("{Method} called", nameof(AfterResponseAsync));
Expand Down Expand Up @@ -121,6 +107,12 @@ public override async Task AfterResponseAsync(ProxyResponseArgs e, CancellationT
break;
}

if (!File.Exists(outputFileName))
{
Logger.LogDebug("Creating output file {FileName} with header", outputFileName);
await File.AppendAllLinesAsync(outputFileName, [UsageRecord.GetHeader()], cancellationToken);
}

await File.AppendAllLinesAsync(outputFileName, [usage.ToString()], cancellationToken);
Logger.LogRequest("Processed OpenAI request", MessageType.Processed, new(e.Session));

Expand Down