From eaa2f2b9294feb0c62f507fef573c9d2462069b5 Mon Sep 17 00:00:00 2001 From: sneak Date: Tue, 29 Sep 2020 23:35:07 -0700 Subject: [PATCH] initial --- .drone.yml | 12 ++ .gitignore | 2 + Dockerfile | 50 ++++++ LICENSE | 14 ++ Makefile | 61 +++++++ README.md | 26 +++ go.mod | 9 + go.sum | 296 ++++++++++++++++++++++++++++++++ httpserver/handlehealthcheck.go | 27 +++ httpserver/handleindex.go | 12 ++ httpserver/http.go | 72 ++++++++ httpserver/main.go | 195 +++++++++++++++++++++ httpserver/routes.go | 9 + 13 files changed, 785 insertions(+) create mode 100644 .drone.yml create mode 100644 .gitignore create mode 100644 Dockerfile create mode 100644 LICENSE create mode 100644 Makefile create mode 100644 README.md create mode 100644 go.mod create mode 100644 go.sum create mode 100644 httpserver/handlehealthcheck.go create mode 100644 httpserver/handleindex.go create mode 100644 httpserver/http.go create mode 100644 httpserver/main.go create mode 100644 httpserver/routes.go diff --git a/.drone.yml b/.drone.yml new file mode 100644 index 0000000..c9efb44 --- /dev/null +++ b/.drone.yml @@ -0,0 +1,12 @@ +kind: pipeline +name: test-docker-build + +steps: +- name: test-docker-build + image: plugins/docker + settings: + repo: foo/bar + dry_run: true + tags: + - ${DRONE_COMMIT_SHA} + - ${DRONE_BRANCH} diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..20577a7 --- /dev/null +++ b/.gitignore @@ -0,0 +1,2 @@ +httpd +debug.log diff --git a/Dockerfile b/Dockerfile new file mode 100644 index 0000000..59c6bf4 --- /dev/null +++ b/Dockerfile @@ -0,0 +1,50 @@ +## lint image +FROM golangci/golangci-lint@sha256:9ae3767101cd3468cdaea5b6573dadb358013e05ac38abe37d53646680fd386c AS linter + +RUN mkdir -p /build +WORKDIR /build +COPY ./ ./ +RUN golangci-lint run + +## build image: +#ARG GO_VERSION=1.15 +FROM golang:1.15-alpine AS builder + +RUN mkdir /user && \ + echo 'nobody:x:65534:65534:nobody:/:' > /user/passwd && \ + echo 'nobody:x:65534:' > /user/group +RUN apk add --no-cache ca-certificates git bzip2 make gcc libc-dev + +#RUN GO111MODULE=on go get github.com/golangci/golangci-lint/cmd/golangci-lint@v1.31.0 + +RUN mkdir -p /build +WORKDIR /build + +COPY go.mod . +COPY go.sum . +RUN go mod download + +COPY ./ ./ +#RUN make lint +RUN make build +RUN go mod vendor +RUN tar -c . | bzip2 > /src.tbz2 + +## output image: +FROM ubuntu:focal AS final +COPY --from=builder /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/ +COPY --from=builder /build/httpd /app/httpd +COPY --from=builder /src.tbz2 /usr/local/src/src.tbz2 + + +WORKDIR /app +ENV HOME /app + +ENV PORT 8080 +ENV DBURL none + +EXPOSE 8080 + +USER nobody:nogroup + +ENTRYPOINT ["/app/httpd"] diff --git a/LICENSE b/LICENSE new file mode 100644 index 0000000..ee7d6a5 --- /dev/null +++ b/LICENSE @@ -0,0 +1,14 @@ + DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE + Version 2, December 2004 + + Copyright (C) 2004 Sam Hocevar + + Everyone is permitted to copy and distribute verbatim or modified + copies of this license document, and changing it is allowed as long + as the name is changed. + + DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE + TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION + + 0. You just DO WHAT THE FUCK YOU WANT TO. + diff --git a/Makefile b/Makefile new file mode 100644 index 0000000..2a0edf7 --- /dev/null +++ b/Makefile @@ -0,0 +1,61 @@ +VERSION := $(shell git rev-parse --short=8 HEAD) +BUILDTIME := $(shell date -u '+%Y-%m-%dT%H:%M:%SZ') +BUILDTIMEFILENAME := $(shell date -u '+%Y%m%d-%H%M%SZ') +BUILDTIMETAG := $(shell date -u '+%Y%m%d%H%M%S') +BUILDUSER := $(shell whoami) +BUILDHOST := $(shell hostname -s) +BUILDARCH := $(shell uname -m) + +FN := http + +UNAME_S := $(shell uname -s) + +GOLDFLAGS += -X main.Version=$(VERSION) +GOLDFLAGS += -X main.Buildarch=$(BUILDARCH) + +# osx can't statically link apparently?! +ifeq ($(UNAME_S),Darwin) + GOFLAGS := -ldflags "$(GOLDFLAGS)" +endif + +ifneq ($(UNAME_S),Darwin) + GOFLAGS = -ldflags "-linkmode external -extldflags -static $(GOLDFLAGS)" +endif + +default: debug + +commit: fmt lint + git commit -a + +fmt: + goimports -l -w . + golangci-lint run --fix + +lint: + golangci-lint run + sh -c 'test -z "$$(gofmt -l .)"' + +debug: build + DEBUG=1 GOTRACEBACK=all ./$(FN)d + +debugger: + cd cmd/$(FN)d && dlv debug main.go + +run: build + ./$(FN)d + +clean: + -rm -f ./$(FN)d debug.log + +build: ./$(FN)d + +docker: + docker build . + +get: + cd cmd/$(FN)d && go get -v + +./$(FN)d: */*.go cmd/*/*.go get + cd cmd/$(FN)d && go build -o ../../$(FN)d $(GOFLAGS) . + +.PHONY: build fmt test is_uncommitted docker dist hub upload-docker-image clean run rundebug default build-docker-image-dist diff --git a/README.md b/README.md new file mode 100644 index 0000000..29a837c --- /dev/null +++ b/README.md @@ -0,0 +1,26 @@ +# gohttpserver + +This is my boilerplate for starting a new go HTTP server repository. + +Many ideas are taken from Mat Ryer's talk How I Write HTTP Web Services +after Eight Years at GopherCon 2019, seen here: + +https://www.youtube.com/watch?v=rWBSMsLG8po + +# TODO + +* Database Boilerplate +* Logging Middleware +* Authentication Middleware Stub +* Bundling Static Assets Into Binary +* Dockerization + +# Author + +sneak@sneak.berlin + +https://sneak.berlin + +# License + +WTFPL diff --git a/go.mod b/go.mod new file mode 100644 index 0000000..4a0584e --- /dev/null +++ b/go.mod @@ -0,0 +1,9 @@ +module git.eeqj.de/sneak/gohttpserver + +go 1.15 + +require ( + github.com/gorilla/mux v1.8.0 + github.com/rs/zerolog v1.20.0 + github.com/spf13/viper v1.7.1 +) diff --git a/go.sum b/go.sum new file mode 100644 index 0000000..096aec3 --- /dev/null +++ b/go.sum @@ -0,0 +1,296 @@ +cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw= +cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw= +cloud.google.com/go v0.38.0/go.mod h1:990N+gfupTy94rShfmMCWGDn0LpTmnzTp2qbd1dvSRU= +cloud.google.com/go v0.44.1/go.mod h1:iSa0KzasP4Uvy3f1mN/7PiObzGgflwredwwASm/v6AU= +cloud.google.com/go v0.44.2/go.mod h1:60680Gw3Yr4ikxnPRS/oxxkBccT6SA1yMk63TGekxKY= +cloud.google.com/go v0.45.1/go.mod h1:RpBamKRgapWJb87xiFSdk4g1CME7QZg3uwTez+TSTjc= 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`json:"version"` + Appname string `json:"appname"` + } + return func(w http.ResponseWriter, req *http.Request) { + resp := &response{ + Status: "ok", + Now: time.Now().UTC().Format(time.RFC3339Nano), + Uptime: fmt.Sprintf("%f", s.uptime().Seconds()), + Appname: s.appname, + Version: s.version, + } + s.respondJSON(w, req, resp, 200) + } +} diff --git a/httpserver/handleindex.go b/httpserver/handleindex.go new file mode 100644 index 0000000..ba07e6f --- /dev/null +++ b/httpserver/handleindex.go @@ -0,0 +1,12 @@ +package httpserver + +import ( + "fmt" + "net/http" +) + +func (s *server) handleIndex() http.HandlerFunc { + return func(w http.ResponseWriter, r *http.Request) { + fmt.Fprintf(w, "hello world") + } +} diff --git a/httpserver/http.go b/httpserver/http.go new file mode 100644 index 0000000..040f87b --- /dev/null +++ b/httpserver/http.go @@ -0,0 +1,72 @@ +package httpserver + +import ( + "context" + "encoding/json" + "fmt" + "net/http" + "time" + + "github.com/rs/zerolog/log" +) + +func (s *server) serveUntilShutdown() { + listenAddr := fmt.Sprintf(":%d", s.port) + s.httpServer = &http.Server{ + Addr: listenAddr, + ReadTimeout: 10 * time.Second, + WriteTimeout: 10 * time.Second, + MaxHeaderBytes: 1 << 20, + Handler: s, + } + + // add routes + // this does any necessary setup in each handler + s.routes() + + log.Info().Str("listenaddr", listenAddr).Msg("http begin listen") + if err := s.httpServer.ListenAndServe(); err != nil && err != http.ErrServerClosed { + log.Error().Msgf("listen:%+s\n", err) + if s.cancelFunc != nil { + s.cancelFunc() + } + } +} + +func (s *server) respondJSON(w http.ResponseWriter, r *http.Request, data interface{}, status int) { + w.WriteHeader(status) + w.Header().Set("Content-Type", "application/json") + if data != nil { + err := json.NewEncoder(w).Encode(data) + if err != nil { + log.Error().Err(err).Msg("json encode error") + } + } +} + +func (s *server) decodeJSON(w http.ResponseWriter, r *http.Request, v interface{}) error { + return json.NewDecoder(r.Body).Decode(v) +} + +func (s *server) ServeHTTP(w http.ResponseWriter, r *http.Request) { + // FIXME logging or any other general purpose middleware here + s.router.ServeHTTP(w, r) +} + +func (s *server) cleanupForExit() { + log.Info().Msg("cleaning up") + // FIXME unimplemented + // close database connections or whatever +} + +func (s *server) cleanShutdown() { + // initiate clean shutdown + s.exitCode = 0 + ctxShutdown, _ := context.WithTimeout(context.Background(), 5*time.Second) + if err := s.httpServer.Shutdown(ctxShutdown); err != nil { + log.Error(). + Err(err). + Msg("server clean shutdown failed") + } + s.cleanupForExit() +} diff --git a/httpserver/main.go b/httpserver/main.go new file mode 100644 index 0000000..f05b324 --- /dev/null +++ b/httpserver/main.go @@ -0,0 +1,195 @@ +package httpserver + +import ( + "context" + "fmt" + "io" + "net/http" + "os" + "os/signal" + "syscall" + "time" + + "github.com/gorilla/mux" + "github.com/rs/zerolog" + "github.com/rs/zerolog/log" + "github.com/spf13/viper" +) + +type server struct { + appname string + version string + buildarch string + databaseURL string + startupTime time.Time + port int + exitCode int + log *zerolog.Logger + ctx context.Context + cancelFunc context.CancelFunc + httpServer *http.Server + router *mux.Router +} + +func NewServer(options ...func(s *server)) *server { + n := new(server) + n.startupTime = time.Now() + n.version = "unknown" + for _, opt := range options { + opt(n) + } + + return n +} + +// this is where we come in from package main. +func Run(appname, version, buildarch string) int { + s := NewServer(func(i *server) { + i.appname = appname + if version != "" { + i.version = version + } + i.buildarch = buildarch + }) + + s.configure() + s.setupLogging() + + s.databaseURL = viper.GetString("DBURL") + s.port = viper.GetInt("PORT") + + return s.serve() +} + +func (s *server) serve() int { + s.ctx, s.cancelFunc = context.WithCancel(context.Background()) + + // signal watcher + go func() { + c := make(chan os.Signal) + signal.Ignore(syscall.SIGPIPE) + signal.Notify(c, os.Interrupt, syscall.SIGTERM) + // block and wait for signal + sig := <-c + log.Info().Msgf("signal received: %+v", sig) + if s.cancelFunc != nil { + // cancelling the main context will trigger a clean + // shutdown. + s.cancelFunc() + } + }() + + go s.serveUntilShutdown() + + for { + select { + case <-s.ctx.Done(): + //aforementioned clean shutdown upon main context + //cancellation + s.cleanShutdown() + return s.exitCode + } + } + +} + +func (s *server) uptime() time.Duration { + return time.Since(s.startupTime) +} + +func (s *server) configure() { + viper.SetConfigName(s.appname) + viper.SetConfigType("yaml") + viper.AddConfigPath(fmt.Sprintf("/etc/%s", s.appname)) // path to look for the config file in + viper.AddConfigPath(fmt.Sprintf("$HOME/.config/%s", s.appname)) // call multiple times to add many search paths + //viper.SetEnvPrefix(strings.ToUpper(s.appname)) + viper.AutomaticEnv() + + viper.SetDefault("DEBUG", "false") + viper.SetDefault("PORT", "8080") + viper.SetDefault("DBURL", "") + + if err := viper.ReadInConfig(); err != nil { + if _, ok := err.(viper.ConfigFileNotFoundError); ok { + // Config file not found; ignore error if desired + } else { + // Config file was found but another error was produced + log.Panic(). + Err(err). + Msg("config file malformed") + } + } + + // if viper.GetBool("debug") { + // pp.Print(viper.AllSettings()) + // } +} + +func (s *server) setupLogging() { + // always log in UTC + zerolog.TimestampFunc = func() time.Time { + return time.Now().UTC() + } + log.Logger = log.With().Caller().Logger() + zerolog.SetGlobalLevel(zerolog.InfoLevel) + + tty := false + if fileInfo, _ := os.Stdout.Stat(); (fileInfo.Mode() & os.ModeCharDevice) != 0 { + tty = true + } + + log.Info().Bool("tty", tty).Msg("tty detection") + + var writers []io.Writer + + if tty { + consoleWriter := zerolog.NewConsoleWriter( + func(w *zerolog.ConsoleWriter) { + // Customize time format + w.TimeFormat = time.RFC3339Nano + }, + ) + + writers = append(writers, consoleWriter) + } else { + writers = append(writers, os.Stdout) + } + + /* + logfile := viper.GetString("Logfile") + if logfile != "" { + logfileDir := filepath.Dir(logfile) + err := goutil.Mkdirp(logfileDir) + if err != nil { + log.Error().Err(err).Msg("unable to create log dir") + } + + hp.logfh, err = os.OpenFile(logfile, os.O_WRONLY|os.O_CREATE|os.O_APPEND, 0644) + if err != nil { + panic("unable to open logfile: " + err.Error()) + } + + writers = append(writers, hp.logfh) + } + */ + + multi := zerolog.MultiLevelWriter(writers...) + logger := zerolog.New(multi).With().Timestamp().Logger().With().Caller().Logger() + + log.Logger = logger + + if viper.GetBool("debug") { + zerolog.SetGlobalLevel(zerolog.DebugLevel) + log.Debug().Bool("debug", true).Send() + } + + s.identify() +} + +func (s *server) identify() { + log.Info(). + Str("appname", s.appname). + Str("version", s.version). + Str("buildarch", s.buildarch). + Msg("starting") +} diff --git a/httpserver/routes.go b/httpserver/routes.go new file mode 100644 index 0000000..b2cc2a0 --- /dev/null +++ b/httpserver/routes.go @@ -0,0 +1,9 @@ +package httpserver + +import "github.com/gorilla/mux" + +func (s *server) routes() { + s.router = mux.NewRouter() + s.router.HandleFunc("/", s.handleIndex()).Methods("GET") + s.router.HandleFunc("/.well-known/healthcheck.json", s.handleHealthCheck()).Methods("GET") +}