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ASM make sure to append content type and length information #3204

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GustavoCaso
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What does this PR do?

On ASM, append HTTP request information as part of the top-level span.

The code that collects the request header assumes we are interested in all header requests starting with HTTP_. Those headers are set by the client following the RFC3875 section 4.1.18

Unfortunately, that is not the case for specific headers that are specified by the server. For example, Content-Type and Content-Length are not prefixed with HTTP_

The variables are called CGI server variables. Here is the list

This PR appends the content type and content length information and improves our specs.

Motivation:

Additional Notes:

How to test the change?

For Datadog employees:

  • If this PR touches code that signs or publishes builds or packages, or handles
    credentials of any kind, I've requested a review from @DataDog/security-design-and-guidance.
  • This PR doesn't touch any of that.

Unsure? Have a question? Request a review!

@GustavoCaso GustavoCaso requested review from a team as code owners October 17, 2023 14:48
@github-actions github-actions bot added appsec Application Security monitoring product integrations Involves tracing integrations labels Oct 17, 2023
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Codecov Report

Merging #3204 (8b68fcb) into master (c6c3935) will decrease coverage by 0.01%.
Report is 3 commits behind head on master.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #3204      +/-   ##
==========================================
- Coverage   98.21%   98.21%   -0.01%     
==========================================
  Files        1252     1252              
  Lines       71937    71988      +51     
  Branches     3331     3333       +2     
==========================================
+ Hits        70654    70701      +47     
- Misses       1283     1287       +4     
Files Coverage Δ
lib/datadog/appsec/contrib/rack/gateway/request.rb 100.00% <100.00%> (ø)
...atadog/appsec/contrib/rack/gateway/request_spec.rb 100.00% <100.00%> (ø)
...tadog/appsec/contrib/rack/reactive/request_spec.rb 100.00% <100.00%> (ø)
spec/datadog/appsec/event_spec.rb 100.00% <100.00%> (ø)

... and 1 file with indirect coverage changes

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@GustavoCaso GustavoCaso changed the title Asm make sure to append content type and length information ASM make sure to append content type and length information Oct 17, 2023
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@lloeki lloeki left a comment

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LGTM

@GustavoCaso GustavoCaso added this to the 1.16.0 milestone Nov 2, 2023
@GustavoCaso GustavoCaso merged commit 9688f2f into master Nov 2, 2023
218 checks passed
@GustavoCaso GustavoCaso deleted the asm-make-sure-to-append-content-type-and-length-information branch November 2, 2023 09:00
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3 participants