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Addresses #858 - Update logging example to use released version of log/slog #864

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Addresses #858 - Update logging example to use released version of log/slog #864

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ydarb
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@ydarb ydarb commented Oct 19, 2023 •
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chore: Update logging example to use released version of log/slog

Adds bool to flip example between a TextHandler and a JSONHandler. Update Panic() to pretty print stack trace if log handler is a TextHandler, otherwise it will log the stack trace as a JSON value string with a key of "stack".

Ref: #858

Example TextHandler log messages for each endpoint:

/
level=INFO msg="request started" ts="Thu, 19 Oct 2023 07:00:40 UTC" req_id=host.local/duevLL4tFS-000001 http_scheme=http http_proto=HTTP/1.1 http_method=GET remote_addr=127.0.0.1:51360 user_agent=curl/8.1.2 uri=http://localhost:3333/ level=INFO msg="request complete" ts="Thu, 19 Oct 2023 07:00:40 UTC" req_id=host.local/duevLL4tFS-000001 http_scheme=http http_proto=HTTP/1.1 http_method=GET remote_addr=127.0.0.1:51360 user_agent=curl/8.1.2 uri=http://localhost:3333/ resp_status=200 resp_byte_length=7 resp_elapsed_ms=0.008208
/wait
level=INFO msg="request started" ts="Thu, 19 Oct 2023 07:01:11 UTC" req_id=host.local/duevLL4tFS-000002 http_scheme=http http_proto=HTTP/1.1 http_method=GET remote_addr=127.0.0.1:51361 user_agent=curl/8.1.2 uri=http://localhost:3333/wait level=INFO msg="request complete" ts="Thu, 19 Oct 2023 07:01:11 UTC" req_id=host.local/duevLL4tFS-000002 http_scheme=http http_proto=HTTP/1.1 http_method=GET remote_addr=127.0.0.1:51361 user_agent=curl/8.1.2 uri=http://localhost:3333/wait wait=true resp_status=200 resp_byte_length=2 resp_elapsed_ms=1001.1815
/panic
level=INFO msg="request started" ts="Thu, 19 Oct 2023 07:02:14 UTC" req_id=host.local/duevLL4tFS-000004 http_scheme=http http_proto=HTTP/1.1 http_method=GET remote_addr=127.0.0.1:51363 user_agent=curl/8.1.2 uri=http://localhost:3333/panic

panic: oops

-> main.main.func3
-> /home/user/workspace/github.com/ydarb/chi/_examples/logging/main.go:49

net/http.HandlerFunc.ServeHTTP
  /home/user/sdk/go1.21.3/src/net/http/server.go:2136
github.com/go-chi/chi/v5.(*Mux).routeHTTP
  /home/user/workspace/github.com/ydarb/chi/mux.go:443
net/http.HandlerFunc.ServeHTTP
  /home/user/sdk/go1.21.3/src/net/http/server.go:2136
github.com/go-chi/chi/v5/middleware.Recoverer.func1
  /home/user/workspace/github.com/ydarb/chi/middleware/recoverer.go:45
net/http.HandlerFunc.ServeHTTP
  /home/user/sdk/go1.21.3/src/net/http/server.go:2136
main.main.NewStructuredLogger.RequestLogger.func6.1
  /home/user/workspace/github.com/ydarb/chi/middleware/logger.go:54
net/http.HandlerFunc.ServeHTTP
  /home/user/sdk/go1.21.3/src/net/http/server.go:2136
github.com/go-chi/chi/v5/middleware.RequestID.func1
  /home/user/workspace/github.com/ydarb/chi/middleware/request_id.go:76
net/http.HandlerFunc.ServeHTTP
  /home/user/sdk/go1.21.3/src/net/http/server.go:2136
github.com/go-chi/chi/v5.(*Mux).ServeHTTP
  /home/user/workspace/github.com/ydarb/chi/mux.go:90
net/http.serverHandler.ServeHTTP
  /home/user/sdk/go1.21.3/src/net/http/server.go:2938
net/http.(*conn).serve
  /home/user/sdk/go1.21.3/src/net/http/server.go:2009
created by net/http.(*Server).Serve in goroutine 1
  /home/user/sdk/go1.21.3/src/net/http/server.go:3086

level=INFO msg="request complete" ts="Thu, 19 Oct 2023 07:02:14 UTC" req_id=host.local/duevLL4tFS-000004 http_scheme=http http_proto=HTTP/1.1 http_method=GET remote_addr=127.0.0.1:51363 user_agent=curl/8.1.2 uri=http://localhost:3333/panic resp_status=500 resp_byte_length=0 resp_elapsed_ms=1.102334

/add_fields
level=INFO msg="request started" ts="Thu, 19 Oct 2023 07:01:40 UTC" req_id=host.local/duevLL4tFS-000003 http_scheme=http http_proto=HTTP/1.1 http_method=GET remote_addr=127.0.0.1:51362 user_agent=curl/8.1.2 uri=http://localhost:3333/add_fields level=INFO msg="request complete" ts="Thu, 19 Oct 2023 07:01:40 UTC" req_id=host.local/duevLL4tFS-000003 http_scheme=http http_proto=HTTP/1.1 http_method=GET remote_addr=127.0.0.1:51362 user_agent=curl/8.1.2 uri=http://localhost:3333/add_fields foo=bar bar=foo resp_status=0 resp_byte_length=0 resp_elapsed_ms=0.01025

Example JSONHandler log messages for each endpoint:

/
{"level":"INFO","msg":"request started","ts":"Thu, 19 Oct 2023 06:53:59 UTC","req_id":"host.local/bcrS9QYbWA-000001","http_scheme":"http","http_proto":"HTTP/1.1","http_method":"GET","remote_addr":"127.0.0.1:51351","user_agent":"curl/8.1.2","uri":"http://localhost:3333/"} {"level":"INFO","msg":"request complete","ts":"Thu, 19 Oct 2023 06:53:59 UTC","req_id":"host.local/bcrS9QYbWA-000001","http_scheme":"http","http_proto":"HTTP/1.1","http_method":"GET","remote_addr":"127.0.0.1:51351","user_agent":"curl/8.1.2","uri":"http://localhost:3333/","resp_status":200,"resp_byte_length":7,"resp_elapsed_ms":0.008083}
/wait
{"level":"INFO","msg":"request started","ts":"Thu, 19 Oct 2023 06:55:28 UTC","req_id":"host.local/nI9MmaOJqA-000001","http_scheme":"http","http_proto":"HTTP/1.1","http_method":"GET","remote_addr":"127.0.0.1:51354","user_agent":"curl/8.1.2","uri":"http://localhost:3333/wait"} {"level":"INFO","msg":"request complete","ts":"Thu, 19 Oct 2023 06:55:28 UTC","req_id":"host.local/nI9MmaOJqA-000001","http_scheme":"http","http_proto":"HTTP/1.1","http_method":"GET","remote_addr":"127.0.0.1:51354","user_agent":"curl/8.1.2","uri":"http://localhost:3333/wait","wait":true,"resp_status":200,"resp_byte_length":2,"resp_elapsed_ms":1001.277084}
/panic
{"level":"INFO","msg":"request started","ts":"Thu, 19 Oct 2023 06:55:59 UTC","req_id":"host.local/nI9MmaOJqA-000002","http_scheme":"http","http_proto":"HTTP/1.1","http_method":"GET","remote_addr":"127.0.0.1:51355","user_agent":"curl/8.1.2","uri":"http://localhost:3333/panic"} {"level":"ERROR","msg":"oops","ts":"Thu, 19 Oct 2023 06:55:59 UTC","req_id":"host.local/nI9MmaOJqA-000002","http_scheme":"http","http_proto":"HTTP/1.1","http_method":"GET","remote_addr":"127.0.0.1:51355","user_agent":"curl/8.1.2","uri":"http://localhost:3333/panic","stack":"goroutine 34 [running]:\nruntime/debug.Stack()\n\t/home/user/sdk/go1.21.3/src/runtime/debug/stack.go:24 +0x64\ngithub.com/go-chi/chi/v5/middleware.Recoverer.func1.1()\n\t/home/user/workspace/github.com/ydarb/chi/middleware/recoverer.go:34 +0x88\npanic({0x10519f1c0?, 0x105201430?})\n\t/home/user/sdk/go1.21.3/src/runtime/panic.go:914 +0x218\nmain.main.func3({0x1400011ad20?, 0x14000116ed0?}, 0x1050fbff3?)\n\t/home/user/workspace/github.com/ydarb/chi/_examples/logging/main.go:49 +0x2c\nnet/http.HandlerFunc.ServeHTTP(0x1051b0460?, {0x10c142958?, 0x140000b2140?}, 0x140000b4004?)\n\t/home/user/sdk/go1.21.3/src/net/http/server.go:2136 +0x38\ngithub.com/go-chi/chi/v5.(*Mux).routeHTTP(0x14000126180, {0x10c142958, 0x140000b2140}, 0x140000b0300)\n\t/home/user/workspace/github.com/ydarb/chi/mux.go:443 +0x270\nnet/http.HandlerFunc.ServeHTTP(0x140001898d8?, {0x10c142958?, 0x140000b2140?}, 0x1050f529c?)\n\t/home/user/sdk/go1.21.3/src/net/http/server.go:2136 +0x38\ngithub.com/go-chi/chi/v5/middleware.Recoverer.func1({0x10c142958?, 0x140000b2140?}, 0x14000189900?)\n\t/home/user/workspace/github.com/ydarb/chi/middleware/recoverer.go:45 +0x78\nnet/http.HandlerFunc.ServeHTTP(0x140000b0200?, {0x10c142958?, 0x140000b2140?}, 0x104eb0894?)\n\t/home/user/sdk/go1.21.3/src/net/http/server.go:2136 +0x38\nmain.main.NewStructuredLogger.RequestLogger.func6.1({0x105204680, 0x140000bc000}, 0x140000b0200)\n\t/home/user/workspace/github.com/ydarb/chi/middleware/logger.go:54 +0x120\nnet/http.HandlerFunc.ServeHTTP(0x105204d40?, {0x105204680?, 0x140000bc000?}, 0x10517b628?)\n\t/home/user/sdk/go1.21.3/src/net/http/server.go:2136 +0x38\ngithub.com/go-chi/chi/v5/middleware.RequestID.func1({0x105204680, 0x140000bc000}, 0x140000b0100)\n\t/home/user/workspace/github.com/ydarb/chi/middleware/request_id.go:76 +0x214\nnet/http.HandlerFunc.ServeHTTP(0x105204d78?, {0x105204680?, 0x140000bc000?}, 0x1053bd310?)\n\t/home/user/sdk/go1.21.3/src/net/http/server.go:2136 +0x38\ngithub.com/go-chi/chi/v5.(*Mux).ServeHTTP(0x14000126180, {0x105204680, 0x140000bc000}, 0x140000b0000)\n\t/home/user/workspace/github.com/ydarb/chi/mux.go:90 +0x2bc\nnet/http.serverHandler.ServeHTTP({0x14000092090?}, {0x105204680?, 0x140000bc000?}, 0x6?)\n\t/home/user/sdk/go1.21.3/src/net/http/server.go:2938 +0xbc\nnet/http.(*conn).serve(0x14000096000, {0x105204d40, 0x140001170b0})\n\t/home/user/sdk/go1.21.3/src/net/http/server.go:2009 +0x518\ncreated by net/http.(*Server).Serve in goroutine 1\n\t/home/user/sdk/go1.21.3/src/net/http/server.go:3086 +0x4cc\n"} {"level":"INFO","msg":"request complete","ts":"Thu, 19 Oct 2023 06:55:59 UTC","req_id":"host.local/nI9MmaOJqA-000002","http_scheme":"http","http_proto":"HTTP/1.1","http_method":"GET","remote_addr":"127.0.0.1:51355","user_agent":"curl/8.1.2","uri":"http://localhost:3333/panic","resp_status":500,"resp_byte_length":0,"resp_elapsed_ms":1.621458}
/add_fields
{"level":"INFO","msg":"request started","ts":"Thu, 19 Oct 2023 06:57:44 UTC","req_id":"host.local/nI9MmaOJqA-000003","http_scheme":"http","http_proto":"HTTP/1.1","http_method":"GET","remote_addr":"127.0.0.1:51356","user_agent":"curl/8.1.2","uri":"http://localhost:3333/add_fields"} {"level":"INFO","msg":"request complete","ts":"Thu, 19 Oct 2023 06:57:44 UTC","req_id":"host.local/nI9MmaOJqA-000003","http_scheme":"http","http_proto":"HTTP/1.1","http_method":"GET","remote_addr":"127.0.0.1:51356","user_agent":"curl/8.1.2","uri":"http://localhost:3333/add_fields","foo":"bar","bar":"foo","resp_status":0,"resp_byte_length":0,"resp_elapsed_ms":0.01525}

@ydarb
chore: Update logging example to use released version of log/slog
19398c6 
Adds bool to flip example between a TextHandler and a JSONHandler.
Update Panic() to pretty print stack trace if log handler is a
TextHandler, otherwise it will log the stack trace as a JSON value
string with a key of "stack".

Ref: go-chi#858
alexandear
alexandear reviewed Oct 19, 2023
View reviewed changes
_examples/logging/main.go
"time"

"golang.org/x/exp/slog"
"log/slog"
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This won't compile on Go 1.20 and below. Should we add a compiler directive for the file?

@pkieltyka
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See go-chi/httplog#17 for a complete slog http logger PR

@pkieltyka
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thanks for the PR, I will review as well here to get the example updated

@pkieltyka
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Please see https://github.com/go-chi/httplog/releases/tag/v2.0.0

@pkieltyka pkieltyka closed this Oct 21, 2023
@ydarb ydarb deleted the fb/858-update-slog-example branch June 24, 2024 00:40
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@ydarb @pkieltyka @alexandear