feat: Support binary based decoding for SNS message attributes#269
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feat: Support binary based decoding for SNS message attributes#269
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Codecov Report
@@ Coverage Diff @@
## main #269 +/- ##
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+ Coverage 82.75% 82.84% +0.08%
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Files 37 37
Lines 1618 1626 +8
Branches 349 351 +2
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+ Hits 1339 1347 +8
Misses 231 231
Partials 48 48
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astuyve
commented
Mar 2, 2022
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Somehow, I forgot to add an expectation to this test 🤦🏻
agocs
approved these changes
Mar 2, 2022
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robcarlan-datadog
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Jul 11, 2025
…ction (#7205) ## Summary of changes SNS -> SQS context propagation was broken, as we encode the value of the `_datadog` header into base64. On the consume side, we assume it is written as a string, which is only true if we send a message directly through SQS. The fix is to decode the `_datadog` value based on the type, just as in [this](DataDog/datadog-lambda-js#269) PR. This soles issues where the DSM map doesn't show links between SNS and SQS, as the checkpoint is still created on the consumer, just without a link to the parent. ## Reason for change ## Implementation details ## Test coverage I tested this via system-tests, with a description of my test methodology in [this PR](DataDog/system-tests#4897). The SNS system test above pass when I ran locally with this tracer build. ## Other details <!-- Fixes #{issue} --> <!--⚠️ Note: where possible, please obtain 2 approvals prior to merging. Unless CODEOWNERS specifies otherwise, for external teams it is typically best to have one review from a team member, and one review from apm-dotnet. Trivial changes do not require 2 reviews. -->
chojomok
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Jul 15, 2025
…ction (#7205) ## Summary of changes SNS -> SQS context propagation was broken, as we encode the value of the `_datadog` header into base64. On the consume side, we assume it is written as a string, which is only true if we send a message directly through SQS. The fix is to decode the `_datadog` value based on the type, just as in [this](DataDog/datadog-lambda-js#269) PR. This soles issues where the DSM map doesn't show links between SNS and SQS, as the checkpoint is still created on the consumer, just without a link to the parent. ## Reason for change ## Implementation details ## Test coverage I tested this via system-tests, with a description of my test methodology in [this PR](DataDog/system-tests#4897). The SNS system test above pass when I ran locally with this tracer build. ## Other details <!-- Fixes #{issue} --> <!--⚠️ Note: where possible, please obtain 2 approvals prior to merging. Unless CODEOWNERS specifies otherwise, for external teams it is typically best to have one review from a team member, and one review from apm-dotnet. Trivial changes do not require 2 reviews. -->
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What does this PR do?
Fixes DataDog/serverless-plugin-datadog#232
TODO: Bump linked version of dd-trace in this PR
Motivation
Although AWS documentation claims that string values are supported, AWS support has told us that stuffing JSON into a string is not supported, and breaks filter policies entirely. These messages are not rejected, and are successfully delivered to recipients without a filter policy, so they fail silently.
This change is backwards compatible, so users still relying on DD trace 2.1 can use this version.
Testing Guidelines
I created a test app that publishes to a topic and contains an SQS subscription with a filter policy. I've verified that these changes combined with my changes in dd trace js (DataDog/dd-trace-js#1889) properly propagate trace context and are not subject to filter policies:
Additional Notes
Types of Changes
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