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fix [core] trace level shows the first kb of the payload before being decoded #534

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Merged
merged 6 commits into from
Jul 22, 2025
Merged

fix [core] trace level shows the first kb of the payload before being decoded #534

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33cec70
fix : #404 : trace level shows the first kb of the payload before bei…
sebsto Jul 21, 2025
ab5d58e
DRY 1024
sebsto Jul 21, 2025
de88eb5
define constant forgotten by copilot
sebsto Jul 21, 2025
96fd150
swift-format
sebsto Jul 21, 2025
14b7922
Merge branch 'main' into sebsto/log_event
sebsto Jul 21, 2025
310501f
Merge branch 'main' into sebsto/log_event
sebsto Jul 21, 2025
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18 changes: 18 additions & 0 deletions Sources/AWSLambdaRuntime/Lambda.swift
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Original file line number Diff line number Diff line change
Expand Up @@ -44,6 +44,24 @@ public enum Lambda {
let (invocation, writer) = try await runtimeClient.nextInvocation()
logger[metadataKey: "aws-request-id"] = "\(invocation.metadata.requestID)"

// when log level is trace or lower, print the first Kb of the payload
let bytes = invocation.event
let maxPayloadPreviewSize = 1024
var metadata: Logger.Metadata? = nil
if logger.logLevel <= .trace,
let buffer = bytes.getSlice(at: 0, length: min(bytes.readableBytes, maxPayloadPreviewSize))
{
metadata = [
"Event's first bytes": .string(
String(buffer: buffer) + (bytes.readableBytes > maxPayloadPreviewSize ? "..." : "")
)
]
}
logger.trace(
"Sending invocation event to lambda handler",
metadata: metadata
)

do {
try await handler.handle(
invocation.event,
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