iframe-proxy

cosmo0920 · 2026-10-13T04:37:00Z

Implemented while preserving KEEPALIVE | AUTO_INFLATE.

Bounded gzip, zstd, and Snappy inflation; oversized bodies return 413.
OAuth authentication runs before inflation.
Enforced the existing proposed 8:1 ceiling, which can also reject legitimate highly compressible payloads.

Verification: 17 inflation tests, 13 authentication tests, and 3 CTest suites passed.

Focused integration commands:

& tests/integration/.venv/Scripts/python.exe -m pytest tests/integration/scenarios/in_http/tests/test_in_http_001.py -k inflation -q
& tests/integration/.venv/Scripts/python.exe -m pytest tests/integration/scenarios/in_http/tests/test_in_http_001.py tests/integration/scenarios/in_opentelemetry/tests/test_in_opentelemetry_001.py -k 'oauth2 and not http2' -q

Remaining verification limits: curl-based HTTP/2 cases lack a compatible curl; one Prometheus listener-log assertion failed. Memory checker not run: Valgrind and macOS Leaks are unavailable on Windows.

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Fluent Bit is licensed under Apache 2.0, by submitting this pull request I understand that this code will be released under the terms of that license.

Summary by CodeRabbit

New Features
- HTTP and OpenTelemetry inputs now validate OAuth2 credentials before processing request bodies. Health-check requests remain accessible when health checks are enabled.
- HTTP request bodies encoded with gzip, Zstandard, or Snappy are automatically decompressed within the configured size limit.
Bug Fixes
- Requests that exceed decompression limits receive HTTP 413; other decompression failures receive HTTP 400.
- Rejected requests do not prevent subsequent requests on the same keep-alive connection.

chatgpt-codex-connector · 2026-10-13T04:37:09Z

coderabbitai · 2026-10-13T04:37:29Z

No actionable comments were generated in the recent review. 🎉

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📥 Commits

Reviewing files that changed from the base of the PR and between 6e40f6c and c112208.

📒 Files selected for processing (2)

src/http_server/flb_http_server.c
tests/integration/scenarios/in_http/tests/test_in_http_001.py

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📝 Walkthrough

HTTP request and response decompression now accept an output budget and support gzip, Zstandard, and Snappy. The HTTP server authorizes configured requests before inflation, limits decompressed bodies, and reports decompression errors. The HTTP and OpenTelemetry inputs register OAuth2 authorization callbacks when configured.

Changes: HTTP request processing

Layer / File(s)	Summary
Budgeted body decompression `include/fluent-bit/flb_http_common.h`, `src/flb_http_common.c`, `tests/internal/http_server.c`	Request and response decompression accept an output budget and use a shared path for gzip, Zstandard, and Snappy. Tests check budget boundaries, malformed input, and preservation of the original body on failure.
Server authorization and bounded inflation `include/fluent-bit/http_server/flb_http_server.h`, `src/http_server/flb_http_server.c`, `tests/integration/scenarios/in_http/config/in_http_inflation.yaml`, `tests/integration/scenarios/in_http/tests/test_in_http_001.py`	The server invokes an optional authorization callback before body inflation and request handling. It uses the configured buffer maximum as the decompression limit and commits status 413 for limit errors or 400 for other decompression errors. Integration tests cover size boundaries, connection reuse, malformed and oversized bodies, and authorization responses.
Input plugin OAuth authorization `plugins/in_http/http.c`, `plugins/in_http/http_prot.`, `plugins/in_opentelemetry/opentelemetry.c`, `plugins/in_opentelemetry/opentelemetry_prot.`, `tests/integration/scenarios/in_opentelemetry/tests/test_in_opentelemetry_001.py`	The HTTP and OpenTelemetry inputs register authorization callbacks when OAuth2 contexts exist. The callbacks validate authorization headers and return HTTP 401 or gRPC status 16 on validation failure. An OpenTelemetry test sends invalid gzip-marked input.

Priority: ➖ Normal

Estimated code review effort: 3 (Moderate) | ~25 minutes

Change: Bug fix

Sequence Diagram(s)

sequenceDiagram
  participant HTTPServer
  participant AuthorizationCallback
  participant BodyDecompressor
  participant RequestCallback
  HTTPServer->>AuthorizationCallback: authorize request when configured
  AuthorizationCallback-->>HTTPServer: allow or commit rejection response
  HTTPServer->>BodyDecompressor: decompress within configured buffer maximum
  BodyDecompressor-->>HTTPServer: decompressed body or error
  HTTPServer->>RequestCallback: dispatch after authorization and successful decompression

Merge Risk: ⚪ Minimal · up to c1122

The previously identified compression risks are not present at the reviewed head. The inspected authorization paths return their intended rejection responses, so no actionable merge-blocking risk remains after normal checks.

Pre-merge checks · 4 · 1

Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage		Docstring coverage is 10.71% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 28 functions across 13 files.	Write docstrings for the functions missing them to satisfy the coverage threshold.

Passed checks (4 passed)

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Actionable comments posted: 3

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Inline comments:
Review comments at @src/flb_http_common.c:
- Around line 397-409: Extend the encoding dispatch that assigns `algorithm` to
handle `deflate` and `zlib`, and route them through the existing budgeted
inflation path. Preserve bounded decompression for both request-body inflation
and response decompression.

Review comments at @src/http_server/flb_http_server.c:
- Around line 427-430: Remove the fixed expansion-ratio cap from the request
budget calculation so compressed bodies may expand up to the existing
buffer_max_size limit. Update the logic around
FLB_HTTP_SERVER_MAX_EXPANSION_RATIO to rely on that configured budget without
rejecting otherwise valid batches.

Review comments at
@tests/integration/scenarios/in_http/tests/test_in_http_001.py:
- Around line 851-868: Update test_in_http_inflation_ratio_and_auth to avoid
requiring rejection of a valid payload that fits within the 8192-byte buffer.
Use a gzip-compressed payload whose decompressed size exceeds buffer_max_size
for the ratio-specific rejection case, while preserving the OAuth case’s
expected 401 behavior.

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ℹ️ Review info

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Configuration used: defaults
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📥 Commits

Reviewing files that changed from the base of the PR and between 3b6ce5c and 6e40f6c.

📒 Files selected for processing (14)

include/fluent-bit/flb_http_common.h
include/fluent-bit/http_server/flb_http_server.h
plugins/in_http/http.c
plugins/in_http/http_prot.c
plugins/in_http/http_prot.h
plugins/in_opentelemetry/opentelemetry.c
plugins/in_opentelemetry/opentelemetry_prot.c
plugins/in_opentelemetry/opentelemetry_prot.h
src/flb_http_common.c
src/http_server/flb_http_server.c
tests/integration/scenarios/in_http/config/in_http_inflation.yaml
tests/integration/scenarios/in_http/tests/test_in_http_001.py
tests/integration/scenarios/in_opentelemetry/tests/test_in_opentelemetry_001.py
tests/internal/http_server.c

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Signed-off-by: Hiroshi Hatake <hiroshi@chronosphere.io>

…tion Signed-off-by: Hiroshi Hatake <hiroshi@chronosphere.io>

cosmo0920 requested a review from edsiper as a code owner October 13, 2026 04:37

cosmo0920 added this to the Fluent Bit v5.2.0 milestone Oct 13, 2026

github-actions Bot added the docs-required label Oct 13, 2026

cosmo0920 deployed to pr October 13, 2026 04:37 — with GitHub Actions Active

coderabbitai Bot reviewed Oct 13, 2026

View reviewed changes

Comment thread src/flb_http_common.c

Comment thread src/http_server/flb_http_server.c Outdated

Comment thread tests/integration/scenarios/in_http/tests/test_in_http_001.py Outdated

cosmo0920 deployed to pr October 13, 2026 05:12 — with GitHub Actions Active

cosmo0920 had a problem deploying to pr October 13, 2026 05:12 — with GitHub Actions Failure

cosmo0920 added 6 commits October 13, 2026 15:52

http_server: bound automatic body inflation and add authorization hook

ed2a9c1

Signed-off-by: Hiroshi Hatake <hiroshi@chronosphere.io>

in_http: authenticate before automatic body inflation

fbe294e

Signed-off-by: Hiroshi Hatake <hiroshi@chronosphere.io>

in_opentelemetry: authenticate before automatic body inflation

a8c9e15

Signed-off-by: Hiroshi Hatake <hiroshi@chronosphere.io>

tests: internal: cover bounded HTTP body inflation

af29d4c

Signed-off-by: Hiroshi Hatake <hiroshi@chronosphere.io>

tests: integration: cover HTTP inflation limits and authorization

6972a75

Signed-off-by: Hiroshi Hatake <hiroshi@chronosphere.io>

tests: integration: verify OpenTelemetry authorization precedes infla…

c112208

…tion Signed-off-by: Hiroshi Hatake <hiroshi@chronosphere.io>

cosmo0920 force-pushed the cosmo0920-plug-decompress-explosion branch from 6e40f6c to c112208 Compare October 13, 2026 06:53

cosmo0920 deployed to pr October 13, 2026 06:53 — with GitHub Actions Active

cosmo0920 deployed to pr October 13, 2026 07:28 — with GitHub Actions Active

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http_server: in_opentelemetry: plug decompress explosion possibilities - #12568

http_server: in_opentelemetry: plug decompress explosion possibilities#12568
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