[jdx]

https://entire.io/gh/jdx/mise/trails/485

Fixes #14045

A download whose HTTP/2 stream is reset mid-body (error decoding response body: ... stream error received) failed on the first attempt regardless of http_retries. reqwest reports that as a Decode error wrapping an h2::Error, which is_transient did not recognize.

is_transient now treats Decode errors as transient unless a serde_json::Error is in the source chain, so JSON deserialization failures stay non-retryable. A unit test covers the deserialization case; a reset-stream positive test would need a TLS+h2 test server, which the harness lacks.

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Note

Medium Risk
Changes HTTP retry classification for all Decode errors; incorrect serde detection could wrongly retry bad JSON or skip retries for transport failures.

Overview
HTTP retries now treat reqwest Decode errors as transient (so mid-download failures like HTTP/2 stream resets honor http_retries), while JSON deserialization failures stay permanent.

is_transient walks the error source chain with a new is_serde_error helper: transport-level body decode failures retry; errors whose chain includes serde_json::Error do not. A unit test asserts that a failed resp.json() is Decode but not transient.

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Summary by CodeRabbit

• Bug Fixes
  • Improved retry handling for HTTP response decoding failures caused by transient transport issues, such as HTTP/2 stream resets.
  • JSON deserialization errors remain non-retryable, avoiding repeated attempts when a response body contains invalid JSON.

[coderabbitai]

📝 Walkthrough

Walkthrough

Reqwest decode errors are now classified as transient when their source chain contains no serde_json::Error. A test confirms that JSON deserialization errors remain non-transient.

Changes

HTTP retry classification

Layer / File(s)	Summary
Decode error classification crates/mise-util/src/http.rs, crates/mise-util/src/http/tests/retry.rs	The source-chain check identifies serde_json::Error. is_transient classifies reqwest decode errors as transient only when the chain contains no serde JSON error. The test verifies that a JSON deserialization error is non-transient.

Priority: ➖ Normal

Estimated code review effort: 2 (Simple) | ~10 minutes

Change: Bug fix · Severity of issue fixed: Medium

Merge Risk: 🔵 Low · up to 242d0

A malformed compressed OCI blob may be downloaded repeatedly before failing, adding bounded bandwidth use and delay. The issue is limited to failed responses, but should be corrected or explicitly accepted.

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 60.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 5 functions across 2 files.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly identifies the HTTP fix: retry downloads when an HTTP/2 stream reset interrupts the body read.
Linked Issues check	✅ Passed	Issue #14045 requires retry classification for HTTP/2 stream-reset Decode errors. is_transient now treats reqwest Decode errors as transient unless their source chain contains `serde_json::Error…
Out of Scope Changes check	✅ Passed	The changes in crates/mise-util/src/http.rs and crates/mise-util/src/http/tests/retry.rs both implement or test issue #14045. No unrelated changes appear in the pull request diff.

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[greptile-apps]

Confidence Score: 5/5

[Medium risk] Changes retry logic for download failures.

The PR appears safe to merge; no actionable issue was found.

What we checked:

• Retried downloads keep valid bytes: Failed transfers clear partials that cannot safely resume. Other partials resume with Range and If-Range, and fresh transfers truncate the output file.

Summary

This PR lets downloads retry when an HTTP/2 stream reset appears as a non-JSON Decode error.

• is_serde_error checks the error’s causes so JSON deserialization failures remain non-retryable.
• A new test checks that invalid JSON remains non-retryable.
• jdx acknowledges that a positive stream-reset test is missing because the harness lacks a TLS+h2 server.

_{Reviews (1) · Last reviewed commit: "fix(http): retry downloads when an HTTP/..." · Reviewed by Greptile}

[coderabbitai]

Actionable comments posted: 1

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• 🪄 Fix CodeRabbit comments on this PR

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Inline comments:
Review comments at @crates/mise-util/src/http.rs:
- Around line 2760-2765: Update the decode-error classification around
`reqwest_err.is_decode()` and `is_serde_error` to retry only recognized
transport failures, rather than treating every non-serde decode error as
transient. Keep HTTP/2 stream-reset errors retryable while leaving malformed
gzip body-read errors non-retryable.

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ℹ️ Review info

⚙️ Run configuration

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• Run ID: fbed63f9-2455-40d7-ad06-0d734d14b561

📥 Commits

Reviewing files that changed from the base of the PR and between 0a9f126 and 242d068.

📒 Files selected for processing (2)

• crates/mise-util/src/http.rs
• crates/mise-util/src/http/tests/retry.rs

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