Hello, World!

commit 12fbb066661f8e43f00e2b2129f43286c37f4a92 Author: Valentin Brandl Date: Sun Aug 25 16:40:48 2024 +0200 Initial commit diff --git a/.gitea/workflows/golangci-lint.yml b/.gitea/workflows/golangci-lint.yml new file mode 100644 index 0000000..873678e --- /dev/null +++ b/.gitea/workflows/golangci-lint.yml @@ -0,0 +1,20 @@ +name: golangci-lint +on: + push: + branches: + - main + pull_request: + +jobs: + golangci: + name: lint + runs-on: ubuntu-latest + steps: + - uses: actions/checkout@v4 + - uses: actions/setup-go@v5 + with: + go-version-file: 'go.mod' + - name: golangci-lint + uses: golangci/golangci-lint-action@v6 + with: + version: 'latest' diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..b5b8858 --- /dev/null +++ b/.gitignore @@ -0,0 +1,30 @@ +# Created by https://www.toptal.com/developers/gitignore/api/go +# Edit at https://www.toptal.com/developers/gitignore?templates=go + +### Go ### +# If you prefer the allow list template instead of the deny list, see community template: +# https://github.com/github/gitignore/blob/main/community/Golang/Go.AllowList.gitignore +# +# Binaries for programs and plugins +*.exe +*.exe~ +*.dll +*.so +*.dylib + +# Test binary, built with `go test -c` +*.test + +# Output of the go coverage tool, specifically when used with LiteIDE +*.out + +# Dependency directories (remove the comment below to include it) +# vendor/ + +# Go workspace file +go.work + +# End of https://www.toptal.com/developers/gitignore/api/go + +config.toml +server diff --git a/assets/embed.go b/assets/embed.go new file mode 100644 index 0000000..5e777cb --- /dev/null +++ b/assets/embed.go @@ -0,0 +1,9 @@ +package assets + +import "embed" + +//go:embed public +var Templates embed.FS + +//go:embed static +var Static embed.FS diff --git a/assets/public/html/footer.tmpl b/assets/public/html/footer.tmpl new file mode 100644 index 0000000..dd68608 --- /dev/null +++ b/assets/public/html/footer.tmpl @@ -0,0 +1,13 @@ +{{ define "footer" }} +

+ +

+{{ end }} diff --git a/assets/public/html/index.html b/assets/public/html/index.html new file mode 100644 index 0000000..5e2e53a --- /dev/null +++ b/assets/public/html/index.html @@ -0,0 +1,26 @@ + + + + + + + + + Hello, World! + + + + + {{ template "navbar" }} + +

Content

+ + {{ template "footer" }} + + + + diff --git a/assets/public/html/navbar.tmpl b/assets/public/html/navbar.tmpl new file mode 100644 index 0000000..e4c6319 --- /dev/null +++ b/assets/public/html/navbar.tmpl @@ -0,0 +1,14 @@ +{{ define "navbar" }} + +{{ end }} diff --git a/assets/public/html/notFound.html b/assets/public/html/notFound.html new file mode 100644 index 0000000..cfc1b7c --- /dev/null +++ b/assets/public/html/notFound.html @@ -0,0 +1,28 @@ + + + + + + + + + Hello, World! + + + + + {{ template "navbar" }} + +

Not Found

Page not Found

Request-ID: {{ .RequestID }}

+ + {{ template "footer" }} + + + + diff --git a/assets/static/js/htmx.org@2.0.2.js b/assets/static/js/htmx.org@2.0.2.js new file mode 100644 index 0000000..c11fbbd --- /dev/null +++ b/assets/static/js/htmx.org@2.0.2.js @@ -0,0 +1 @@ +var htmx=function(){"use strict";const Q={onLoad:null,process:null,on:null,off:null,trigger:null,ajax:null,find:null,findAll:null,closest:null,values:function(e,t){const n=cn(e,t||"post");return 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"github.com/rs/zerolog/log" +) + +const ( + ConfigPath = "./config.toml" + DefaultLogLevel = "info" + DefaultPort = 8080 +) + +type Config struct { + Log log + Http http +} + +type http struct { + Port uint16 +} + +type log struct { + Level string +} + +func defaultConfig() Config { + return Config{ + Log: log{ + Level: DefaultLogLevel, + }, + Http: http{ + Port: DefaultPort, + }, + } +} + +func loadConfig(path string) Config { + logger := l.Error().Str("path", path) + config := defaultConfig() + + file, err := os.Open(path) + if err != nil { + logger.Err(err).Msg("cannot open file, using default config") + return config + } + + dec := toml.NewDecoder(file) + err = dec.Decode(&config) + if err != nil { + logger.Err(err).Msg("cannot parse config, using default") + return config + } + + return config +} + +func NewConfig() Config { + return loadConfig(ConfigPath) +} + +func (c *Config) LogLevel() zerolog.Level { + switch strings.ToLower(c.Log.Level) { + case "error": + return zerolog.ErrorLevel + case "debug": + return zerolog.DebugLevel + case "trace": + return zerolog.TraceLevel + case "warn": + return zerolog.WarnLevel + default: + return zerolog.InfoLevel + } +} diff --git a/example.config.toml b/example.config.toml new file mode 100644 index 0000000..0f40660 --- /dev/null +++ b/example.config.toml @@ -0,0 +1,4 @@ +[http] +port = 8080 +[log] +level = "info" diff --git a/go.mod b/go.mod new file mode 100644 index 0000000..c173f53 --- /dev/null +++ b/go.mod @@ -0,0 +1,14 @@ +module git.vbrandl.net/vbrandl/go-web-template + +go 1.22.6 + +require ( + github.com/gorilla/mux v1.8.1 // indirect + github.com/justinas/alice v1.2.0 // indirect + github.com/mattn/go-colorable v0.1.13 // indirect + github.com/mattn/go-isatty v0.0.19 // indirect + github.com/pelletier/go-toml/v2 v2.2.3 // indirect + github.com/rs/xid v1.5.0 // indirect + github.com/rs/zerolog v1.33.0 // indirect + golang.org/x/sys v0.12.0 // indirect +) diff --git a/go.sum b/go.sum new file mode 100644 index 0000000..136b9fc --- /dev/null +++ b/go.sum @@ -0,0 +1,22 @@ +github.com/coreos/go-systemd/v22 v22.5.0/go.mod h1:Y58oyj3AT4RCenI/lSvhwexgC+NSVTIJ3seZv2GcEnc= +github.com/godbus/dbus/v5 v5.0.4/go.mod h1:xhWf0FNVPg57R7Z0UbKHbJfkEywrmjJnf7w5xrFpKfA= +github.com/gorilla/mux v1.8.1 h1:TuBL49tXwgrFYWhqrNgrUNEY92u81SPhu7sTdzQEiWY= +github.com/gorilla/mux v1.8.1/go.mod h1:AKf9I4AEqPTmMytcMc0KkNouC66V3BtZ4qD5fmWSiMQ= +github.com/justinas/alice v1.2.0 h1:+MHSA/vccVCF4Uq37S42jwlkvI2Xzl7zTPCN5BnZNVo= +github.com/justinas/alice v1.2.0/go.mod h1:fN5HRH/reO/zrUflLfTN43t3vXvKzvZIENsNEe7i7qA= +github.com/mattn/go-colorable v0.1.13 h1:fFA4WZxdEF4tXPZVKMLwD8oUnCTTo08duU7wxecdEvA= +github.com/mattn/go-colorable v0.1.13/go.mod h1:7S9/ev0klgBDR4GtXTXX8a3vIGJpMovkB8vQcUbaXHg= +github.com/mattn/go-isatty v0.0.16/go.mod h1:kYGgaQfpe5nmfYZH+SKPsOc2e4SrIfOl2e/yFXSvRLM= +github.com/mattn/go-isatty v0.0.19 h1:JITubQf0MOLdlGRuRq+jtsDlekdYPia9ZFsB8h/APPA= +github.com/mattn/go-isatty v0.0.19/go.mod h1:W+V8PltTTMOvKvAeJH7IuucS94S2C6jfK/D7dTCTo3Y= +github.com/pelletier/go-toml/v2 v2.2.3 h1:YmeHyLY8mFWbdkNWwpr+qIL2bEqT0o95WSdkNHvL12M= +github.com/pelletier/go-toml/v2 v2.2.3/go.mod h1:MfCQTFTvCcUyyvvwm1+G6H/jORL20Xlb6rzQu9GuUkc= +github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0= +github.com/rs/xid v1.5.0 h1:mKX4bl4iPYJtEIxp6CYiUuLQ/8DYMoz0PUdtGgMFRVc= +github.com/rs/xid v1.5.0/go.mod h1:trrq9SKmegXys3aeAKXMUTdJsYXVwGY3RLcfgqegfbg= +github.com/rs/zerolog v1.33.0 h1:1cU2KZkvPxNyfgEmhHAz/1A9Bz+llsdYzklWFzgp0r8= +github.com/rs/zerolog v1.33.0/go.mod h1:/7mN4D5sKwJLZQ2b/znpjC3/GQWY/xaDXUM0kKWRHss= +golang.org/x/sys v0.0.0-20220811171246-fbc7d0a398ab/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg= +golang.org/x/sys v0.6.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg= +golang.org/x/sys v0.12.0 h1:CM0HF96J0hcLAwsHPJZjfdNzs0gftsLfgKt57wWHJ0o= +golang.org/x/sys v0.12.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg= diff --git a/handlers/healthcheck.go b/handlers/healthcheck.go new file mode 100644 index 0000000..ddca717 --- /dev/null +++ b/handlers/healthcheck.go @@ -0,0 +1,77 @@ +package handlers + +import ( + "encoding/json" + "fmt" + "net/http" + "runtime" + "time" + + "github.com/rs/zerolog/hlog" +) + +const ( + jsonContentType = "application/json;charset=utf-8" +) + +type Timing struct { + TimeMillis time.Duration `json:"timeMillis"` + Source string `json:"source"` +} + +type HealthCheckResult struct { + Success bool `json:"success"` + Messages []string `json:"messages"` + Time time.Time `json:"time"` + Timing []Timing `json:"timing"` + Response HealthCheckResponse `json:"response"` +} + +type HealthCheckResponse struct { + IpAddress string `json:"ipAddress"` + MemUsage string `json:"memUsage"` +} + +func (app *Application) HealthCheck(w http.ResponseWriter, r *http.Request) { + l := hlog.FromRequest(r) + l.Info().Msg("HealthCheck") + start := time.Now() + + t, _ := json.Marshal(HealthCheckResult{ + Success: true, + Messages: []string{}, + Time: time.Now().UTC(), + Timing: []Timing{ + { + Source: "HealthCheck", + TimeMillis: time.Since(start), + }, + }, + Response: HealthCheckResponse{ + IpAddress: getIP(r), + MemUsage: memUsage(), + }, + }) + + w.Header().Set("content-type", jsonContentType) + _, _ = fmt.Fprint(w, string(t)) +} + +func getIP(r *http.Request) string { + // forwarded := r.Header.Get("X-FORWARDED-FOR") + // if forwarded != "" { + // return forwarded + // } + return r.RemoteAddr +} + +func memUsage() string { + var m runtime.MemStats + runtime.ReadMemStats(&m) + result := fmt.Sprintf("memoryusage::Alloc = %v MB::TotalAlloc = %v MB::Sys = %v MB::tNumGC = %v", bToMb(m.Alloc), bToMb(m.TotalAlloc), bToMb(m.Sys), m.NumGC) + return result +} + +func bToMb(b uint64) uint64 { + return b / 1024 / 1024 +} diff --git a/handlers/index.go b/handlers/index.go new file mode 100644 index 0000000..6e57cc3 --- /dev/null +++ b/handlers/index.go @@ -0,0 +1,22 @@ +package handlers + +import ( + "net/http" + + "github.com/rs/zerolog/hlog" +) + +func (app *Application) Index(w http.ResponseWriter, r *http.Request) { + l := hlog.FromRequest(r) + l.Info().Msg("Index") + + reqId := RequestID(r) + + err := indexTemplate.Execute(w, templateData{ + RequestID: reqId, + }) + if err != nil { + l.Error().Err(err).Msg("error executing template") + http.Error(w, "Internal Server Error", http.StatusInternalServerError) + } +} diff --git a/handlers/index_test.go b/handlers/index_test.go new file mode 100644 index 0000000..f912f77 --- /dev/null +++ b/handlers/index_test.go @@ -0,0 +1,48 @@ +package handlers_test + +import ( + "net/http" + "net/http/httptest" + "testing" + + "git.vbrandl.net/vbrandl/go-web-template/assets" + "git.vbrandl.net/vbrandl/go-web-template/common" + "git.vbrandl.net/vbrandl/go-web-template/handlers" + "git.vbrandl.net/vbrandl/go-web-template/service" + "github.com/rs/zerolog" + "github.com/rs/zerolog/log" +) + +func PrepareApplication() handlers.Application { + config := common.NewConfig() + ser := service.New(config) + zerolog.SetGlobalLevel(config.LogLevel()) + + app, err := handlers.NewApplication(ser, assets.Static) + if err != nil { + log.Fatal().Err(err).Msg("failed creating application") + } + + return app +} + +func TestIndex(t *testing.T) { + app := PrepareApplication() + + req := httptest.NewRequest(http.MethodGet, "/", nil) + w := httptest.NewRecorder() + + app.Handler().ServeHTTP(w, req) + // app.Index(w, req) + res := w.Result() + defer res.Body.Close() + + if res.StatusCode != 200 { + t.Errorf("expected status to be 200, got %d", res.StatusCode) + } + + reqId := res.Header.Get("x-request-id") + if reqId == "" { + t.Errorf("expected `x-request-id` header to be present, got %s", reqId) + } +} diff --git a/handlers/not_found.go b/handlers/not_found.go new file mode 100644 index 0000000..fce4408 --- /dev/null +++ b/handlers/not_found.go @@ -0,0 +1,23 @@ +package handlers + +import ( + "net/http" + + "github.com/rs/zerolog/hlog" +) + +func (app *Application) NotFound(w http.ResponseWriter, r *http.Request) { + l := hlog.FromRequest(r) + l.Info().Msg("Not found") + + reqId := RequestID(r) + w.WriteHeader(http.StatusNotFound) + + err := notFoundTemplate.Execute(w, templateData{ + RequestID: reqId, + }) + if err != nil { + l.Error().Err(err).Msg("error executing template") + http.Error(w, "Internal Server Error", http.StatusInternalServerError) + } +} diff --git a/handlers/not_found_test.go b/handlers/not_found_test.go new file mode 100644 index 0000000..6b49f31 --- /dev/null +++ b/handlers/not_found_test.go @@ -0,0 +1,37 @@ +package handlers_test + +import ( + "io" + "net/http" + "net/http/httptest" + "strings" + "testing" +) + +func TestNotFound(t *testing.T) { + app := PrepareApplication() + + req := httptest.NewRequest(http.MethodGet, "/some/invalid/path", nil) + w := httptest.NewRecorder() + + app.Handler().ServeHTTP(w, req) + res := w.Result() + defer res.Body.Close() + + if res.StatusCode != 404 { + t.Errorf("expected status to be 404, got %d", res.StatusCode) + } + + reqId := res.Header.Get("x-request-id") + if reqId == "" { + t.Errorf("expected `x-request-id` header to be present, got %s", reqId) + } + + data, err := io.ReadAll(res.Body) + if err != nil { + t.Errorf("expected error to be nil, got %v", err) + } + if !strings.Contains(string(data), reqId) { + t.Errorf("expected body to contain request ID but it does not") + } +} diff --git a/handlers/route.go b/handlers/route.go new file mode 100644 index 0000000..177597c --- /dev/null +++ b/handlers/route.go @@ -0,0 +1,79 @@ +package handlers + +import ( + "io/fs" + "net/http" + "time" + + "git.vbrandl.net/vbrandl/go-web-template/service" + "github.com/gorilla/mux" + "github.com/justinas/alice" + "github.com/rs/zerolog/hlog" + "github.com/rs/zerolog/log" +) + +type Application struct { + Service *service.Service + StaticFiles fs.FS +} + +func NewApplication(service *service.Service, staticFiles fs.FS) (Application, error) { + application := Application{ + Service: service, + StaticFiles: staticFiles, + } + + err := application.ParseTemplates() + + return application, err +} + +func (app *Application) Routes() *mux.Router { + router := mux.NewRouter().StrictSlash(true) + + router.HandleFunc("/", app.Index).Methods("GET") + router.HandleFunc("/health", app.HealthCheck).Methods("GET") + + // strip off the location such that we route correctly + staticContent, err := fs.Sub(app.StaticFiles, "static") + if err != nil { + log.Fatal().Err(err).Msg("error with static content") + } + f := http.FileServerFS(staticContent) + router.PathPrefix("/static/").Handler(http.StripPrefix("/static", f)) + + router.NotFoundHandler = http.HandlerFunc(app.NotFound) + + return router +} + +func (app *Application) Handler() http.Handler { + logger := log.Logger + middlewares := alice.New(). + Append(hlog.NewHandler(logger)). + Append(hlog.AccessHandler(func(r *http.Request, status int, size int, duration time.Duration) { + hlog.FromRequest(r).Info(). + Str("method", r.Method). + Stringer("url", r.URL). + Int("status", status). + Int("size", size). + Str("remote-addr", r.RemoteAddr). + Dur("duration", duration). + Str("user-agent", r.UserAgent()). + Msg("") + })). + Append(hlog.RequestIDHandler("request-id", "x-request-id")) + + routes := app.Routes() + return middlewares.Then(routes) +} + +func RequestID(r *http.Request) string { + if id, ok := hlog.IDFromRequest(r); ok { + return id.String() + } else { + l := hlog.FromRequest(r) + l.Warn().Msg("No associated request ID") + return "unknown" + } +} diff --git a/handlers/template.go b/handlers/template.go new file mode 100644 index 0000000..bc7f91a --- /dev/null +++ b/handlers/template.go @@ -0,0 +1,30 @@ +package handlers + +import ( + "html/template" + + "git.vbrandl.net/vbrandl/go-web-template/assets" +) + +var indexTemplate *template.Template +var notFoundTemplate *template.Template + +type templateData struct { + RequestID string +} + +func (app *Application) ParseTemplates() error { + t, err := template.ParseFS(assets.Templates, "public/html/index.html", "public/html/navbar.tmpl", "public/html/footer.tmpl") + if err != nil { + return err + } + indexTemplate = t + + t, err = template.ParseFS(assets.Templates, "public/html/notFound.html", "public/html/navbar.tmpl", "public/html/footer.tmpl") + if err != nil { + return err + } + notFoundTemplate = t + + return nil +} diff --git a/service/service.go b/service/service.go new file mode 100644 index 0000000..6fd1b41 --- /dev/null +++ b/service/service.go @@ -0,0 +1,36 @@ +package service + +import ( + "sync" + "time" + + "git.vbrandl.net/vbrandl/go-web-template/common" +) + +type Service struct { + BackgroundJobsStarted bool + ServiceMutex sync.Mutex + StartTime time.Time + Config common.Config +} + +func New(config common.Config) *Service { + ser := &Service{ + BackgroundJobsStarted: false, + ServiceMutex: sync.Mutex{}, + StartTime: time.Now(), + Config: config, + } + + ser.StartBackground() + return ser +} + +func (ser *Service) StartBackground() { + ser.ServiceMutex.Lock() + defer ser.ServiceMutex.Unlock() + + ser.BackgroundJobsStarted = true + + // TODO: start jobs +}