Fastify RASP support #6081
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Fastify RASP support #6081
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Overall package sizeSelf size: 11.93 MB Dependency sizes| name | version | self size | total size | |------|---------|-----------|------------| | @datadog/libdatadog | 0.7.0 | 35.02 MB | 35.02 MB | | @datadog/native-appsec | 10.1.0 | 20.37 MB | 20.37 MB | | @datadog/native-iast-taint-tracking | 4.0.0 | 11.72 MB | 11.73 MB | | @datadog/pprof | 5.9.0 | 9.77 MB | 10.1 MB | | @opentelemetry/core | 1.30.1 | 908.66 kB | 7.16 MB | | protobufjs | 7.5.4 | 2.95 MB | 5.6 MB | | @datadog/wasm-js-rewriter | 4.0.1 | 2.85 MB | 3.58 MB | | @datadog/native-metrics | 3.1.1 | 1.02 MB | 1.43 MB | | @opentelemetry/api | 1.8.0 | 1.21 MB | 1.21 MB | | jsonpath-plus | 10.3.0 | 617.18 kB | 1.08 MB | | import-in-the-middle | 1.14.2 | 122.36 kB | 850.93 kB | | lru-cache | 10.4.3 | 804.3 kB | 804.3 kB | | opentracing | 0.14.7 | 194.81 kB | 194.81 kB | | source-map | 0.7.6 | 185.63 kB | 185.63 kB | | pprof-format | 2.1.0 | 111.69 kB | 111.69 kB | | @datadog/sketches-js | 2.1.1 | 109.9 kB | 109.9 kB | | lodash.sortby | 4.7.0 | 75.76 kB | 75.76 kB | | ignore | 7.0.5 | 63.38 kB | 63.38 kB | | istanbul-lib-coverage | 3.2.2 | 34.37 kB | 34.37 kB | | rfdc | 1.4.1 | 27.15 kB | 27.15 kB | | dc-polyfill | 0.1.10 | 26.73 kB | 26.73 kB | | @isaacs/ttlcache | 1.4.1 | 25.2 kB | 25.2 kB | | tlhunter-sorted-set | 0.1.0 | 24.94 kB | 24.94 kB | | shell-quote | 1.8.3 | 23.74 kB | 23.74 kB | | limiter | 1.1.5 | 23.17 kB | 23.17 kB | | retry | 0.13.1 | 18.85 kB | 18.85 kB | | semifies | 1.0.0 | 15.84 kB | 15.84 kB | | jest-docblock | 29.7.0 | 8.99 kB | 12.76 kB | | crypto-randomuuid | 1.0.0 | 11.18 kB | 11.18 kB | | ttl-set | 1.0.0 | 4.61 kB | 9.69 kB | | mutexify | 1.4.0 | 5.71 kB | 8.74 kB | | path-to-regexp | 0.1.12 | 6.6 kB | 6.6 kB | | koalas | 1.0.2 | 6.47 kB | 6.47 kB | | module-details-from-path | 1.0.4 | 3.96 kB | 3.96 kB |🤖 This report was automatically generated by heaviest-objects-in-the-universe |
Codecov Report✅ All modified and coverable lines are covered by tests. Additional details and impacted files@@ Coverage Diff @@
## master #6081 +/- ##
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+ Coverage 83.99% 84.08% +0.09%
==========================================
Files 477 477
Lines 20071 20089 +18
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+ Hits 16858 16892 +34
+ Misses 3213 3197 -16 ☔ View full report in Codecov by Sentry. 🚀 New features to boost your workflow:
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BenchmarksBenchmark execution time: 2025-09-03 10:27:34 Comparing candidate commit 016142b in PR branch Found 0 performance improvements and 0 performance regressions! Performance is the same for 1278 metrics, 45 unstable metrics. |
uurien
reviewed
Aug 14, 2025
CarlesDD
reviewed
Aug 22, 2025
CarlesDD
reviewed
Aug 22, 2025
Co-authored-by: Carles Capell <[email protected]>
CarlesDD
reviewed
Aug 25, 2025
simon-id
commented
Sep 3, 2025
uurien
reviewed
Sep 3, 2025
Comment on lines
+310
to
+312
| // if (isBlocking()) { | ||
| // return | ||
| // } |
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Is this code comment expected to be here?
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yes it's a for later todo
uurien
approved these changes
Sep 3, 2025
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What does this PR do?
Add RASP support for Fastify.
This require creating a new system called "block delegation". Instead of blocking responses synchronously in the middle of a request/response cycle with
block(). We register a "block delegation" withregisterBlockDelegation()that will be picked up when the user/framework call response ending methods (res.writeHead(),res.end(),res.write()), and will then call the normalblock()to send our blocking response in lieu of the user's response. A good ol' switcharoo.This is to allow frameworks to follow their full request life-cycles, instead of us abruptly breaking continuity. For example it allows Fastify to call the
onError,onSendandonResponsehooks correctly, which in turns allow more control on the cleanup of the request by the users.ST PR: DataDog/system-tests#4963