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feat(gw): support UnixFS 1.5 on gateway responses as Last-Modified #659

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merged 4 commits into from
Aug 28, 2024

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@lidel lidel commented Aug 19, 2024

This is bit more involved, and I don't want to block #653 on it, so filling this separate PR.

This PR builds on top of #653 and exposes mtime from dag-pb as Last-Modified header on deserialized /ipfs and /ipns responses (ones that are used for web hosting, and not trustless responses).

TODO

  • block backend
    • return Last-Modifiedon GET responses
    • return Last-Modifiedon HEAD responses
    • 304 Not Modified on matching If-Modified-Since (UnixFS 1.5 file only)
    • Last-Modified and If-Modified-Since tests with and without UnixFS 1.5

(Below moved to #664)

  • car backend
    • return Last-Modifiedon GET responses
    • return Last-Modifiedon HEAD responses
  • add gateway-conformance test and release it as v7
    • confirm conformance passes with all backends (remote car uses different implementation of Get and Head and ContentPathMetadata needs to be updated there as well)

@lidel lidel mentioned this pull request Aug 19, 2024
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codecov bot commented Aug 19, 2024

Codecov Report

Attention: Patch coverage is 49.27536% with 35 lines in your changes missing coverage. Please review.

Project coverage is 60.16%. Comparing base (3cd3857) to head (2e946d1).
Report is 1 commits behind head on main.

Files Patch % Lines
gateway/handler.go 42.59% 27 Missing and 4 partials ⚠️
gateway/backend_blocks.go 50.00% 4 Missing ⚠️

Impacted file tree graph

@@            Coverage Diff             @@
##             main     #659      +/-   ##
==========================================
+ Coverage   60.13%   60.16%   +0.02%     
==========================================
  Files         241      241              
  Lines       30617    30681      +64     
==========================================
+ Hits        18412    18459      +47     
- Misses      10560    10570      +10     
- Partials     1645     1652       +7     
Files Coverage Δ
gateway/gateway.go 83.54% <ø> (ø)
gateway/handler_defaults.go 51.41% <100.00%> (+2.00%) ⬆️
gateway/backend_blocks.go 45.48% <50.00%> (+0.06%) ⬆️
gateway/handler.go 76.27% <42.59%> (-3.35%) ⬇️

... and 12 files with indirect coverage changes

Base automatically changed from feat/unixfs15 to main August 21, 2024 00:03
@lidel lidel force-pushed the feat/last-modified-unixfs-on-gw branch from f894d64 to 0617d60 Compare August 21, 2024 00:35
@lidel lidel force-pushed the feat/last-modified-unixfs-on-gw branch from 0617d60 to 1fcc68b Compare August 27, 2024 19:52
bare minimum support for Last-Modified and If-Modified-Since
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Discussed next steps here with @gammazero during triage today and we decided to ship basic gateway support for Last-Modified / If-Modified-Since for UnixFS 1.5 files with backend_blocks.go (used by Rainbow and Kubo).

The remaining work can be done at a later time, if there is real world need for support in CAR backend. I've filled #664 for that.

Merging this so we can include it in Kubo 0.30.0-rc2.

@@ -745,6 +772,50 @@ func (i *handler) handleIfNoneMatch(w http.ResponseWriter, r *http.Request, rq *
return false
}

func (i *handler) handleIfModifiedSince(w http.ResponseWriter, r *http.Request, rq *requestData) bool {
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ℹ️ this is based on what we already had in handleIfNoneMatch to support If-None-Match, which operates on Etags.

This one is executed only if If-Modified-Since is present in request, which usually is less popular than more deterministic If-None-Match.

Still, we add is here as it costs us nothing to avoid returning payload and returning HTTP 304 Not Modified instead.

@lidel lidel marked this pull request as ready for review August 27, 2024 23:19
@lidel lidel requested a review from a team as a code owner August 27, 2024 23:19
func TestHeadersUnixFSModeModTime(t *testing.T) {
t.Parallel()

ts, _, root := newTestServerAndNode(t, "unixfs-dir-with-mode-mtime.car")
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ℹ️ created with Kubo 0.30.0-rc1

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lidel commented Aug 28, 2024

Added more tests, CI in ipfs/kubo#10494 is green, merging.

@lidel lidel merged commit 08f200a into main Aug 28, 2024
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