experimental: support http3

[thinkerou]

but, quic-go supports the min go version is 1.19 and remove go1.15 for compiling successful

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Comparison is base (eac2daa) 98.63% compared to head (c4ea442) 98.06%. Report is 37 commits behind head on master.

:exclamation: Current head c4ea442 differs from pull request most recent head 6af53ae. Consider uploading reports for the commit 6af53ae to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #3210      +/-   ##
==========================================
- Coverage   98.63%   98.06%   -0.57%     
==========================================
  Files          42       43       +1     
  Lines        3151     3157       +6     
==========================================
- Hits         3108     3096      -12     
- Misses         29       48      +19     
+ Partials       14       13       -1     

Flag	Coverage Δ
	?
go-1.16	98.03% <100.00%> (?)
go-1.17	97.97% <100.00%> (?)
go-1.18	97.97% <100.00%> (-0.57%)	:arrow_down:
go-1.19	?
go-1.20	?
macos-latest	98.06% <100.00%> (-0.57%)	:arrow_down:
nomsgpack	98.03% <100.00%> (?)
ubuntu-latest	98.06% <100.00%> (-0.57%)	:arrow_down:

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[hktalent]

don't use http3.ListenAndServeQUIC example

h3s := http3.Server{
			Addr:       addr,
			Handler:    router.Handler(),
			TLSConfig:  util1.GTls,
			QuicConfig: &quic.Config{},
		}
		if err := h3s.ListenAndServe(); nil != err {
			log.Println("HTTP/3.0 ListenAndServe ", err)
		} else {
			log.Printf("HTTP/3.0  Listening and serving HTTPS on %s\n", addr)
		}

Util1.GTls will be obtained from the dynamic ca server challenge

[appleboy]

ping @thinkerou

[appleboy]

New repo: https://github.com/quic-go/quic-go

[appleboy]

@thinkerou Can you keep working on this PR?

[thinkerou]

@thinkerou Can you keep working on this PR?

updated, but have unit test error:

=== RUN   TestRunQUIC
2023/04/26 07:24:50 failed to sufficiently increase receive buffer size (was: 208 kiB, wanted: 2048 kiB, got: 416 kiB). See https://github.com/quic-go/quic-go/wiki/UDP-Receive-Buffer-Size for details.
    gin_integration_test.go:43: 
        	Error Trace:	/home/runner/work/gin/gin/gin_integration_test.go:43
        	            				/home/runner/work/gin/gin/gin_integration_1.19_test.go:30
        	Error:      	Received unexpected error:
        	            	Get "https://localhost:8443/example": dial tcp [::1]:8443: connect: connection refused
        	Test:       	TestRunQUIC
--- FAIL: TestRunQUIC (0.01s)
panic: runtime error: invalid memory address or nil pointer dereference [recovered]
	panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x40 pc=0xa8aae2]

goroutine 193 [running]:
testing.tRunner.func1.2({0xb4a9e0, 0x11b7ea0})
	/opt/hostedtoolcache/go/1.19.8/x64/src/testing/testing.go:1396 +0x24e
testing.tRunner.func1()
	/opt/hostedtoolcache/go/1.19.8/x64/src/testing/testing.go:1399 +0x39f
panic({0xb4a9e0, 0x11b7ea0})
	/opt/hostedtoolcache/go/1.19.8/x64/src/runtime/panic.go:884 +0x212
github.com/gin-gonic/gin.testRequest(0xc0004af520, {0xc0000c9f50, 0x1, 0xc00040a050?})
	/home/runner/work/gin/gin/gin_integration_test.go:44 +0x182
github.com/gin-gonic/gin.TestRunQUIC(0xc0004af520)
	/home/runner/work/gin/gin/gin_integration_1.19_test.go:30 +0x108
testing.tRunner(0xc0004af520, 0xc6df88)
	/opt/hostedtoolcache/go/1.19.8/x64/src/testing/testing.go:1446 +0x10b
created by testing.(*T).Run
	/opt/hostedtoolcache/go/1.19.8/x64/src/testing/testing.go:1493 +0x35f
FAIL	github.com/gin-gonic/gin	0.084s
FAIL

https://github.com/gin-gonic/gin/actions/runs/4806024121/jobs/8553052446?pr=3210

[mcules]

@thinkerou is there a running version for current stable and an example?

[raphaelauv]

https://endoflife.date/go

1.19 support Ended 2 weeks ago

[appleboy]

Waiting for https://github.com/golang/go/issues/58547 QUIC implementation

[maggie44]

failed to sufficiently increase receive buffer size

This error is anticipated and isn't blocking. Here is the info about it from Cloudflared where it has been used in production for a number of years:

https://github.com/quic-go/quic-go/wiki/UDP-Buffer-Sizes https://github.com/cloudflare/cloudflared/issues/522#issuecomment-1018787568

Duly noted on Golang official implementation, adding in the info here though for reference. Will subscribe to the tracking issue and lend a hand when the time is right.

[maggie44]

And here with a fixed test example: https://github.com/maggie44/gin/commit/790cfe2ed2e4e94a778d88973fe1414f64b7a779

[marten-seemann]

but, quic-go supports the min go version is 1.19 and remove go1.15 for compiling successful

Since mid 2023, quic-go is using crypto/tls (since crypto/tls gained QUIC support in Go 1.20), and we don't impose any limitations on Go versions anymore. This PR should probably be updated to use a more recent quic-go version.