cmd/site: better logging

This commit is contained in:
Cadey Ratio 2019-03-22 18:42:25 -07:00
parent c4d1b02ccb
commit 20c08e68d1
4 changed files with 61 additions and 11 deletions

View File

@ -11,26 +11,36 @@ import (
"github.com/prometheus/client_golang/prometheus"
"github.com/prometheus/client_golang/prometheus/promauto"
"within.website/ln"
"within.website/ln/opname"
)
func logTemplateTime(name string, f ln.F, from time.Time) {
now := time.Now()
ln.Log(context.Background(), f, ln.F{"action": "template_rendered", "dur": now.Sub(from).String(), "name": name})
var (
templateRenderTime = promauto.NewHistogramVec(prometheus.HistogramOpts{
Name: "template_render_time",
Help: "Template render time in nanoseconds",
}, []string{"name"})
)
func logTemplateTime(ctx context.Context, name string, f ln.F, from time.Time) {
dur := time.Since(from)
templateRenderTime.With(prometheus.Labels{"name": name}).Observe(float64(dur))
ln.Log(ctx, f, ln.F{"dur": dur, "name": name})
}
func (s *Site) renderTemplatePage(templateFname string, data interface{}) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
ctx := opname.With(r.Context(), "renderTemplatePage")
fetag := "W/" + Hash(templateFname, etag) + "-1"
f := ln.F{"etag": fetag, "if_none_match": r.Header.Get("If-None-Match")}
if r.Header.Get("If-None-Match") == fetag {
http.Error(w, "Cached data OK", http.StatusNotModified)
ln.Log(r.Context(), f, ln.Info("Cache hit"))
ln.Log(ctx, f, ln.Info("Cache hit"))
return
}
defer logTemplateTime(templateFname, f, time.Now())
defer logTemplateTime(ctx, templateFname, f, time.Now())
var t *template.Template
var err error
@ -38,7 +48,7 @@ func (s *Site) renderTemplatePage(templateFname string, data interface{}) http.H
t, err = template.ParseFiles("templates/base.html", "templates/"+templateFname)
if err != nil {
w.WriteHeader(http.StatusInternalServerError)
ln.Error(context.Background(), err, ln.F{"action": "renderTemplatePage", "page": templateFname})
ln.Error(ctx, err, ln.F{"action": "renderTemplatePage", "page": templateFname})
fmt.Fprintf(w, "error: %v", err)
}

View File

@ -14,13 +14,17 @@ import (
"christine.website/internal/front"
"christine.website/internal/jsonfeed"
"github.com/celrenheit/sandflake"
"github.com/gorilla/feeds"
"github.com/povilasv/prommod"
"github.com/prometheus/client_golang/prometheus"
"github.com/prometheus/client_golang/prometheus/promhttp"
blackfriday "github.com/russross/blackfriday"
"github.com/sebest/xff"
"github.com/snabb/sitemap"
"within.website/ln"
"within.website/ln/ex"
"within.website/ln/opname"
)
var port = os.Getenv("PORT")
@ -74,6 +78,27 @@ func main() {
http.ListenAndServe(":"+port, s)
}
func requestIDMiddleware(next http.Handler) http.Handler {
var g sandflake.Generator
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
id := g.Next().String()
if rid := r.Header.Get("X-Request-Id"); rid != "" {
id = rid + "," + id
}
ctx := ln.WithF(r.Context(), ln.F{
"request_id": id,
})
r = r.WithContext(ctx)
w.Header().Set("X-Request-Id", id)
r.Header.Set("X-Request-Id", id)
next.ServeHTTP(w, r)
})
}
// Site is the parent object for https://christine.website's backend.
type Site struct {
Posts Posts
@ -84,15 +109,17 @@ type Site struct {
mux *http.ServeMux
sitemap []byte
xffmw *xff.XFF
templates map[string]*template.Template
tlock sync.RWMutex
}
func (s *Site) ServeHTTP(w http.ResponseWriter, r *http.Request) {
ln.Log(r.Context(), ln.F{"action": "Site.ServeHTTP", "user_ip_address": r.RemoteAddr, "path": r.RequestURI})
ctx := opname.With(r.Context(), "site.ServeHTTP")
r = r.WithContext(ctx)
s.mux.ServeHTTP(w, r)
requestIDMiddleware(s.xffmw.Handler(ex.HTTPLog(s.mux))).ServeHTTP(w, r)
}
var arbDate = time.Date(2019, time.March, 21, 18, 0, 0, 0, time.UTC)
@ -129,6 +156,12 @@ func Build() (*Site, error) {
ChangeFreq: sitemap.Weekly,
})
xffmw, err := xff.Default()
if err != nil {
return nil, err
}
s := &Site{
rssFeed: &feeds.Feed{
Title: "Christine Dodrill's Blog",
@ -153,10 +186,10 @@ func Build() (*Site, error) {
},
},
mux: http.NewServeMux(),
templates: map[string]*template.Template{},
xffmw: xffmw,
}
err := filepath.Walk("./blog/", func(path string, info os.FileInfo, err error) error {
err = filepath.Walk("./blog/", func(path string, info os.FileInfo, err error) error {
if err != nil {
return err
}

2
go.mod
View File

@ -1,6 +1,7 @@
module christine.website
require (
github.com/celrenheit/sandflake v0.0.0-20171226210037-92cb626f32dc
github.com/golang/protobuf v1.3.1 // indirect
github.com/gorilla/feeds v1.1.0
github.com/kr/pretty v0.1.0 // indirect
@ -11,6 +12,7 @@ require (
github.com/prometheus/common v0.2.0 // indirect
github.com/prometheus/procfs v0.0.0-20190319124303-40f3c57fb198 // indirect
github.com/russross/blackfriday v2.0.0+incompatible
github.com/sebest/xff v0.0.0-20160910043805-6c115e0ffa35
github.com/shurcooL/sanitized_anchor_name v1.0.0 // indirect
github.com/snabb/sitemap v1.0.0
github.com/stretchr/testify v1.3.0

5
go.sum
View File

@ -2,6 +2,8 @@ github.com/alecthomas/template v0.0.0-20160405071501-a0175ee3bccc/go.mod h1:LOuy
github.com/alecthomas/units v0.0.0-20151022065526-2efee857e7cf/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0=
github.com/beorn7/perks v0.0.0-20180321164747-3a771d992973 h1:xJ4a3vCFaGF/jqvzLMYoU8P317H5OQ+Via4RmuPwCS0=
github.com/beorn7/perks v0.0.0-20180321164747-3a771d992973/go.mod h1:Dwedo/Wpr24TaqPxmxbtue+5NUziq4I4S80YR8gNf3Q=
github.com/celrenheit/sandflake v0.0.0-20171226210037-92cb626f32dc h1:JcF3zLolKwrXXeBjvczfaxd3kxwFEBmiBQ6tOdha6QQ=
github.com/celrenheit/sandflake v0.0.0-20171226210037-92cb626f32dc/go.mod h1:7L8gY0+4GYeBc9TvqVuDUq7tXuM6Sj7llnt7HkVwWlQ=
github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
@ -52,6 +54,8 @@ github.com/prometheus/procfs v0.0.0-20190319124303-40f3c57fb198 h1:gANBAZ/83d6fD
github.com/prometheus/procfs v0.0.0-20190319124303-40f3c57fb198/go.mod h1:TjEm7ze935MbeOT/UhFTIMYKhuLP4wbCsTZCD3I8kEA=
github.com/russross/blackfriday v2.0.0+incompatible h1:cBXrhZNUf9C+La9/YpS+UHpUT8YD6Td9ZMSU9APFcsk=
github.com/russross/blackfriday v2.0.0+incompatible/go.mod h1:JO/DiYxRf+HjHt06OyowR9PTA263kcR/rfWxYHBV53g=
github.com/sebest/xff v0.0.0-20160910043805-6c115e0ffa35 h1:eajwn6K3weW5cd1ZXLu2sJ4pvwlBiCWY4uDejOr73gM=
github.com/sebest/xff v0.0.0-20160910043805-6c115e0ffa35/go.mod h1:wozgYq9WEBQBaIJe4YZ0qTSFAMxmcwBhQH0fO0R34Z0=
github.com/shurcooL/sanitized_anchor_name v1.0.0 h1:PdmoCO6wvbs+7yrJyMORt4/BmY5IYyJwS/kOiWx8mHo=
github.com/shurcooL/sanitized_anchor_name v1.0.0/go.mod h1:1NzhyTcUVG4SuEtjjoZeVRXNmyL/1OwPU0+IJeTBvfc=
github.com/sirupsen/logrus v1.2.0/go.mod h1:LxeOpSwHxABJmUn/MG1IvRgCAasNZTLOkJPxbbu5VWo=
@ -70,6 +74,7 @@ github.com/tj/front v0.0.0-20170212063142-739be213b0a1/go.mod h1:deJrtusCTptAW4E
golang.org/x/crypto v0.0.0-20180904163835-0709b304e793/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
golang.org/x/net v0.0.0-20180811021610-c39426892332/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
golang.org/x/net v0.0.0-20181114220301-adae6a3d119a/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
golang.org/x/net v0.0.0-20181201002055-351d144fa1fc h1:a3CU5tJYVj92DY2LaA1kUkrsqD5/3mLDhx2NcNqyW+0=
golang.org/x/net v0.0.0-20181201002055-351d144fa1fc/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
golang.org/x/sync v0.0.0-20181108010431-42b317875d0f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
golang.org/x/sync v0.0.0-20181221193216-37e7f081c4d4/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=