chore: update CI, dependencies, and linter

docs: document /api extra fields (#83 )
Co-authored-by: Fernandez Ludovic <ldez@users.noreply.github.com>
2024-05-07 17:36:04 +02:00 · 2023-11-29 22:33:42 +01:00 · 2023-08-21 23:27:26 +02:00 · 2023-07-12 16:00:34 +02:00 · 2023-07-08 15:55:47 +02:00 · 2023-07-08 15:51:07 +02:00
17 changed files with 1169 additions and 101 deletions
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@ -0,0 +1,49 @@
+name: Main
+
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+
+jobs:
+
+  main:
+    name: Main Process
+    runs-on: ubuntu-latest
+    env:
+      GO_VERSION: stable
+      GOLANGCI_LINT_VERSION: v1.58.0
+      CGO_ENABLED: 0
+
+    steps:
+
+      # https://github.com/marketplace/actions/checkout
+      - name: Check out code
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      # https://github.com/marketplace/actions/setup-go-environment
+      - name: Set up Go ${{ env.GO_VERSION }}
+        uses: actions/setup-go@v5
+        with:
+          go-version: ${{ env.GO_VERSION }}
+
+      - name: Check and get dependencies
+        run: |
+          go mod tidy
+          git diff --exit-code go.mod
+          git diff --exit-code go.sum
+
+      # https://golangci-lint.run/usage/install#other-ci
+      - name: Install golangci-lint ${{ env.GOLANGCI_LINT_VERSION }}
+        run: |
+          curl -sSfL https://raw.githubusercontent.com/golangci/golangci-lint/master/install.sh | sh -s -- -b $(go env GOPATH)/bin ${GOLANGCI_LINT_VERSION}
+          golangci-lint --version
+
+      - name: Make
+        run: make
+
+      - name: Make Image
+        run: make image
--- a/.github/workflows/go-cross.yml
+++ b/.github/workflows/go-cross.yml
@ -0,0 +1,36 @@
+name: Go Matrix
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+
+jobs:
+
+  cross:
+    name: Go
+    runs-on: ${{ matrix.os }}
+    env:
+      CGO_ENABLED: 0
+
+    strategy:
+      matrix:
+        go-version: [ stable, oldstable ]
+        os: [ubuntu-latest, macos-latest, windows-latest]
+
+    steps:
+      # https://github.com/marketplace/actions/checkout
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      # https://github.com/marketplace/actions/setup-go-environment
+      - name: Set up Go ${{ matrix.go-version }}
+        uses: actions/setup-go@v5
+        with:
+          go-version: ${{ matrix.go-version }}
+
+      - name: Test
+        run: go test -v -cover ./...
+
+      - name: Build
+        run: go build -v -ldflags "-s -w" -trimpath
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@ -0,0 +1,55 @@
+name: "Release a tag"
+on:
+  push:
+    tags:
+      - v*
+
+jobs:
+  release:
+    name: Release Process
+    runs-on: ubuntu-latest
+    env:
+      GO_VERSION: stable
+      CGO_ENABLED: 0
+
+    steps:
+
+      # https://github.com/marketplace/actions/checkout
+      - name: Check out code
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      # https://github.com/marketplace/actions/setup-go-environment
+      - name: Set up Go ${{ env.GO_VERSION }}
+        uses: actions/setup-go@v5
+        with:
+          go-version: ${{ env.GO_VERSION }}
+
+      - name: dockerhub-login
+        uses: docker/login-action@v3
+        with:
+          username: ${{ secrets.DOCKER_USERNAME }}
+          password: ${{ secrets.DOCKER_PASSWORD }}
+
+      - name: ghcr-login
+        uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: traefiker
+          password: ${{ secrets.GHCR_TOKEN }}
+
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v3
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      # https://goreleaser.com/ci/actions/
+      - name: Run GoReleaser
+        uses: goreleaser/goreleaser-action@v5
+        with:
+          version: latest
+          args: release --clean
+        env:
+          GITHUB_TOKEN: ${{ secrets.GH_TOKEN_REPO }}
--- a/.gitignore
+++ b/.gitignore
@ -1 +1,4 @@
-/whoamI
+.idea
+vendor/
+/whoami
+dist/
--- a/.golangci.yml
+++ b/.golangci.yml
@ -0,0 +1,96 @@
+run:
+  timeout: 2m
+
+linters-settings:
+  govet:
+    enable-all: true
+    disable:
+      - fieldalignment
+  gocyclo:
+    min-complexity: 16
+  goconst:
+    min-len: 3
+    min-occurrences: 3
+  misspell:
+    locale: US
+  funlen:
+    lines: -1
+    statements: 40
+  gofumpt:
+    extra-rules: true
+  depguard:
+    rules:
+      main:
+        deny:
+          - pkg: "github.com/instana/testify"
+            desc: not allowed
+          - pkg: "github.com/pkg/errors"
+            desc: Should be replaced by standard lib errors package
+  godox:
+    keywords:
+      - FIXME
+  gocritic:
+    enabled-tags:
+      - diagnostic
+      - style
+      - performance
+    disabled-checks:
+      - sloppyReassign
+      - rangeValCopy
+      - octalLiteral
+      - paramTypeCombine # already handle by gofumpt.extra-rules
+    settings:
+      hugeParam:
+        sizeThreshold: 100
+  forbidigo:
+    forbid:
+      - '^print(ln)?$'
+      - '^panic$'
+      - '^spew\.Print(f|ln)?$'
+      - '^spew\.Dump$'
+
+linters:
+  enable-all: true
+  disable:
+    - deadcode # deprecated
+    - exhaustivestruct # deprecated
+    - golint # deprecated
+    - ifshort # deprecated
+    - interfacer # deprecated
+    - maligned # deprecated
+    - nosnakecase # deprecated
+    - scopelint # deprecated
+    - scopelint # deprecated
+    - structcheck # deprecated
+    - varcheck # deprecated
+    - execinquery # not relevant (SQL)
+    - rowserrcheck # not relevant (SQL)
+    - sqlclosecheck # not relevant (SQL)
+    - cyclop # duplicate of gocyclo
+    - dupl
+    - exhaustive
+    - exhaustruct
+    - forbidigo
+    - gochecknoglobals
+    - gochecknoinits
+    - err113
+    - mnd
+    - gomnd
+    - gosec
+    - lll
+    - nilnil
+    - nlreturn
+    - paralleltest
+    - prealloc
+    - testpackage
+    - tparallel
+    - varnamelen
+    - wrapcheck
+    - wsl
+
+issues:
+  exclude-use-default: false
+  max-issues-per-linter: 0
+  max-same-issues: 0
+  exclude:
+    - 'package-comments: should have a package comment'
--- a/.goreleaser.yml
+++ b/.goreleaser.yml
@ -0,0 +1,142 @@
+project_name: whoami
+
+builds:
+  - binary: whoami
+    goos:
+      - windows
+      - darwin
+      - linux
+    goarch:
+      - amd64
+      - arm
+      - arm64
+    goarm:
+      - '7'
+
+changelog:
+  sort: asc
+  filters:
+    exclude:
+      - '^docs:'
+      - '^doc:'
+      - '^chore:'
+      - '^chore(deps):'
+      - '^test:'
+      - '^tests:'
+
+archives:
+  - id: whoami
+    name_template: '{{ .ProjectName }}_v{{ .Version }}_{{ .Os }}_{{ .Arch }}{{ if .Arm}}v{{ .Arm }}{{ end }}'
+    format: tar.gz
+    format_overrides:
+      - goos: windows
+        format: zip
+    files:
+      - LICENSE
+
+docker_manifests:
+  - name_template: 'traefik/whoami:{{ .Tag }}'
+    image_templates:
+      - 'traefik/whoami:{{ .Tag }}-amd64'
+      - 'traefik/whoami:{{ .Tag }}-arm64'
+      - 'traefik/whoami:{{ .Tag }}-armv7'
+  - name_template: 'traefik/whoami:latest'
+    image_templates:
+      - 'traefik/whoami:{{ .Tag }}-amd64'
+      - 'traefik/whoami:{{ .Tag }}-arm64'
+      - 'traefik/whoami:{{ .Tag }}-armv7'
+  - name_template: 'traefik/whoami:v{{ .Major }}.{{ .Minor }}'
+    image_templates:
+      - 'traefik/whoami:v{{ .Major }}.{{ .Minor }}-amd64'
+      - 'traefik/whoami:v{{ .Major }}.{{ .Minor }}-arm64'
+      - 'traefik/whoami:v{{ .Major }}.{{ .Minor }}-armv7'
+
+  - name_template: 'ghcr.io/traefik/whoami:{{ .Tag }}'
+    image_templates:
+      - 'ghcr.io/traefik/whoami:{{ .Tag }}-amd64'
+      - 'ghcr.io/traefik/whoami:{{ .Tag }}-arm64'
+      - 'ghcr.io/traefik/whoami:{{ .Tag }}-armv7'
+  - name_template: 'ghcr.io/traefik/whoami:latest'
+    image_templates:
+      - 'ghcr.io/traefik/whoami:{{ .Tag }}-amd64'
+      - 'ghcr.io/traefik/whoami:{{ .Tag }}-arm64'
+      - 'ghcr.io/traefik/whoami:{{ .Tag }}-armv7'
+  - name_template: 'ghcr.io/traefik/whoami:v{{ .Major }}.{{ .Minor }}'
+    image_templates:
+      - 'ghcr.io/traefik/whoami:v{{ .Major }}.{{ .Minor }}-amd64'
+      - 'ghcr.io/traefik/whoami:v{{ .Major }}.{{ .Minor }}-arm64'
+      - 'ghcr.io/traefik/whoami:v{{ .Major }}.{{ .Minor }}-armv7'
+
+dockers:
+  - use: buildx
+    goos: linux
+    goarch: amd64
+    dockerfile: buildx.Dockerfile
+    image_templates:
+      - 'traefik/whoami:latest-amd64'
+      - 'traefik/whoami:{{ .Tag }}-amd64'
+      - 'traefik/whoami:v{{ .Major }}.{{ .Minor }}-amd64'
+      - 'ghcr.io/traefik/whoami:latest-amd64'
+      - 'ghcr.io/traefik/whoami:{{ .Tag }}-amd64'
+      - 'ghcr.io/traefik/whoami:v{{ .Major }}.{{ .Minor }}-amd64'
+    build_flag_templates:
+      - '--pull'
+      # https://github.com/opencontainers/image-spec/blob/main/annotations.md#pre-defined-annotation-keys
+      - '--label=org.opencontainers.image.title={{.ProjectName}}'
+      - '--label=org.opencontainers.image.description=Tiny Go webserver that prints OS information and HTTP request to output'
+      - '--label=org.opencontainers.image.source={{.GitURL}}'
+      - '--label=org.opencontainers.image.url={{.GitURL}}'
+      - '--label=org.opencontainers.image.documentation={{.GitURL}}'
+      - '--label=org.opencontainers.image.created={{.Date}}'
+      - '--label=org.opencontainers.image.revision={{.FullCommit}}'
+      - '--label=org.opencontainers.image.version={{.Version}}'
+      - '--platform=linux/amd64'
+
+  - use: buildx
+    goos: linux
+    goarch: arm64
+    dockerfile: buildx.Dockerfile
+    image_templates:
+      - 'traefik/whoami:latest-arm64'
+      - 'traefik/whoami:{{ .Tag }}-arm64'
+      - 'traefik/whoami:v{{ .Major }}.{{ .Minor }}-arm64'
+      - 'ghcr.io/traefik/whoami:latest-arm64'
+      - 'ghcr.io/traefik/whoami:{{ .Tag }}-arm64'
+      - 'ghcr.io/traefik/whoami:v{{ .Major }}.{{ .Minor }}-arm64'
+    build_flag_templates:
+      - '--pull'
+      # https://github.com/opencontainers/image-spec/blob/main/annotations.md#pre-defined-annotation-keys
+      - '--label=org.opencontainers.image.title={{.ProjectName}}'
+      - '--label=org.opencontainers.image.description=Tiny Go webserver that prints OS information and HTTP request to output'
+      - '--label=org.opencontainers.image.source={{.GitURL}}'
+      - '--label=org.opencontainers.image.url={{.GitURL}}'
+      - '--label=org.opencontainers.image.documentation={{.GitURL}}'
+      - '--label=org.opencontainers.image.created={{.Date}}'
+      - '--label=org.opencontainers.image.revision={{.FullCommit}}'
+      - '--label=org.opencontainers.image.version={{.Version}}'
+      - '--platform=linux/arm64'
+
+  - use: buildx
+    goos: linux
+    goarch: arm
+    goarm: '7'
+    dockerfile: buildx.Dockerfile
+    image_templates:
+      - 'traefik/whoami:latest-armv7'
+      - 'traefik/whoami:{{ .Tag }}-armv7'
+      - 'traefik/whoami:v{{ .Major }}.{{ .Minor }}-armv7'
+      - 'ghcr.io/traefik/whoami:latest-armv7'
+      - 'ghcr.io/traefik/whoami:{{ .Tag }}-armv7'
+      - 'ghcr.io/traefik/whoami:v{{ .Major }}.{{ .Minor }}-armv7'
+    build_flag_templates:
+      - '--pull'
+      # https://github.com/opencontainers/image-spec/blob/main/annotations.md#pre-defined-annotation-keys
+      - '--label=org.opencontainers.image.title={{.ProjectName}}'
+      - '--label=org.opencontainers.image.description=Tiny Go webserver that prints OS information and HTTP request to output'
+      - '--label=org.opencontainers.image.source={{.GitURL}}'
+      - '--label=org.opencontainers.image.url={{.GitURL}}'
+      - '--label=org.opencontainers.image.documentation={{.GitURL}}'
+      - '--label=org.opencontainers.image.created={{.Date}}'
+      - '--label=org.opencontainers.image.revision={{.FullCommit}}'
+      - '--label=org.opencontainers.image.version={{.Version}}'
+      - '--platform=linux/arm/v7'
--- a/25
+++ b/25
@ -1,5 +1,26 @@
+FROM golang:1-alpine as builder
+
+RUN apk --no-cache --no-progress add git ca-certificates tzdata make \
+    && update-ca-certificates \
+    && rm -rf /var/cache/apk/*
+
+WORKDIR /go/whoami
+
+# Download go modules
+COPY go.mod .
+COPY go.sum .
+RUN GO111MODULE=on GOPROXY=https://proxy.golang.org go mod download
+
+COPY . .
+
+RUN make build
+
 # Create a minimal container to run a Golang static binary
 FROM scratch
-COPY whoamI /
-ENTRYPOINT ["/whoamI"]
+
+COPY --from=builder /usr/share/zoneinfo /usr/share/zoneinfo
+COPY --from=builder /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/
+COPY --from=builder /go/whoami/whoami .
+
+ENTRYPOINT ["/whoami"]
 EXPOSE 80
--- a/202
+++ b/202
@ -0,0 +1,202 @@
+                                 Apache License
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+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
--- a/17
+++ b/17
@ -0,0 +1,17 @@
+.PHONY: default check test build image
+
+IMAGE_NAME := traefik/whoami
+
+default: check test build
+
+build:
+	CGO_ENABLED=0 go build -a --trimpath --installsuffix cgo --ldflags="-s" -o whoami
+
+test:
+	go test -v -cover ./...
+
+check:
+	golangci-lint run
+
+image:
+	docker build -t $(IMAGE_NAME) .
--- a/README.md
+++ b/README.md
@ -1,11 +1,69 @@
-# whoamI
+# whoami

-Tiny Go webserver that prints os information and HTTP request to output
+[![Docker Pulls](https://img.shields.io/docker/pulls/traefik/whoami.svg)](https://hub.docker.com/r/traefik/whoami/)
+[![Build Status](https://github.com/traefik/whoami/workflows/Main/badge.svg?branch=master)](https://github.com/traefik/whoami/actions)
+
+Tiny Go webserver that prints OS information and HTTP request to output.
+
+## Usage
+
+### Paths
+
+#### `/[?wait=d]`
+
+Returns the whoami information (request and network information).
+
+The optional `wait` query parameter can be provided to tell the server to wait before sending the response.
+The duration is expected in Go's [`time.Duration`](https://golang.org/pkg/time/#ParseDuration) format (e.g. `/?wait=100ms` to wait 100 milliseconds).
+
+The optional `env` query parameter can be set to `true` to add the environment variables to the response.
+
+#### `/api`
+
+Returns the whoami information (and some extra information) as JSON.
+
+The optional `env` query parameter can be set to `true` to add the environment variables to the response.
+
+#### `/bench`
+
+Always return the same response (`1`).
+
+#### `/data?size=n[&unit=u]`
+
+Creates a response with a size `n`.
+
+The unit of measure, if specified, accepts the following values: `KB`, `MB`, `GB`, `TB` (optional, default: bytes).
+
+#### `/echo`
+
+WebSocket echo.
+
+#### `/health`
+
+Heath check.
+
+- `GET`, `HEAD`, ...: returns a response with the status code defined by the `POST`
+- `POST`: changes the status code of the `GET` (`HEAD`, ...) response.
+
+### Flags
+
+| Flag      | Env var              | Description                             |
+|-----------|----------------------|-----------------------------------------|
+| `cert`    |                      | Give me a certificate.                  |
+| `key`     |                      | Give me a key.                          |
+| `cacert`  |                      | Give me a CA chain, enforces mutual TLS |
+| `port`    | `WHOAMI_PORT_NUMBER` | Give me a port number. (default: `80`)  |
+| `name`    | `WHOAMI_NAME`        | Give me a name.                         |
+| `verbose` |                      | Enable verbose logging.                 |
+
+## Examples
+
+```console
+$ docker run -d -P --name iamfoo traefik/whoami

-```sh
-$ docker run -d -P --name iamfoo emilevauge/whoami
 $ docker inspect --format '{{ .NetworkSettings.Ports }}'  iamfoo
 map[80/tcp:[{0.0.0.0 32769}]]
+
 $ curl "http://0.0.0.0:32769"
 Hostname :  6e0030e67d6a
 IP :  127.0.0.1
@ -17,3 +75,39 @@ Host: 0.0.0.0:32769
 User-Agent: curl/7.35.0
 Accept: */*
 ```
+
+```console
+# updates health check status
+$ curl -X POST -d '500' http://localhost:80/health
+
+# calls the health check
+$ curl -v http://localhost:80/health
+*   Trying ::1:80...
+* TCP_NODELAY set
+* Connected to localhost (::1) port 80 (#0)
+> GET /health HTTP/1.1
+> Host: localhost:80
+> User-Agent: curl/7.65.3
+> Accept: */*
+> 
+* Mark bundle as not supporting multiuse
+< HTTP/1.1 500 Internal Server Error
+< Date: Mon, 16 Sep 2019 22:52:40 GMT
+< Content-Length: 0
+```
+
+```console
+docker run -d -P -v ./certs:/certs --name iamfoo traefik/whoami --cert /certs/example.cert --key /certs/example.key
+```
+
+```yml
+version: '3.9'
+
+services:
+  whoami:
+    image: traefik/whoami
+    command:
+       # It tells whoami to start listening on 2001 instead of 80
+       - --port=2001
+       - --name=iamfoo
+```
--- a/app.go
+++ b/app.go
@ -1,42 +1,160 @@
 package main

 import (
+	"crypto/tls"
+	"crypto/x509"
 	"encoding/json"
 	"flag"
 	"fmt"
-	"sync"
-
-	"github.com/gorilla/websocket"
-	// "github.com/pkg/profile"
+	"io"
 	"log"
 	"net"
 	"net/http"
-	"net/url"
 	"os"
+	"strconv"
+	"strings"
+	"sync"
 	"time"
+
+	"github.com/gorilla/websocket"
 )

-var port string
-
-func init() {
-	flag.StringVar(&port, "port", "80", "give me a port number")
-}
+// Units.
+const (
+	_        = iota
+	KB int64 = 1 << (10 * iota)
+	MB
+	GB
+	TB
+)

 var upgrader = websocket.Upgrader{
 	ReadBufferSize:  1024,
 	WriteBufferSize: 1024,
+	CheckOrigin: func(_ *http.Request) bool {
+		return true
+	},
+}
+
+var (
+	cert    string
+	key     string
+	ca      string
+	port    string
+	name    string
+	verbose bool
+)
+
+func init() {
+	flag.BoolVar(&verbose, "verbose", false, "Enable verbose logging")
+	flag.StringVar(&cert, "cert", "", "give me a certificate")
+	flag.StringVar(&key, "key", "", "give me a key")
+	flag.StringVar(&ca, "cacert", "", "give me a CA chain, enforces mutual TLS")
+	flag.StringVar(&port, "port", getEnv("WHOAMI_PORT_NUMBER", "80"), "give me a port number")
+	flag.StringVar(&name, "name", os.Getenv("WHOAMI_NAME"), "give me a name")
+}
+
+// Data whoami information.
+type Data struct {
+	Hostname   string            `json:"hostname,omitempty"`
+	IP         []string          `json:"ip,omitempty"`
+	Headers    http.Header       `json:"headers,omitempty"`
+	URL        string            `json:"url,omitempty"`
+	Host       string            `json:"host,omitempty"`
+	Method     string            `json:"method,omitempty"`
+	Name       string            `json:"name,omitempty"`
+	RemoteAddr string            `json:"remoteAddr,omitempty"`
+	Environ    map[string]string `json:"environ,omitempty"`
 }

 func main() {
-	// defer profile.Start().Stop()
 	flag.Parse()
-	http.HandleFunc("/echo", echoHandler)
-	http.HandleFunc("/bench", benchHandler)
-	http.HandleFunc("/", whoamI)
-	http.HandleFunc("/api", api)
-	http.HandleFunc("/health", healthHandler)
-	fmt.Println("Starting up on port " + port)
-	log.Fatal(http.ListenAndServe(":"+port, nil))
+
+	mux := http.NewServeMux()
+	mux.Handle("/data", handle(dataHandler, verbose))
+	mux.Handle("/echo", handle(echoHandler, verbose))
+	mux.Handle("/bench", handle(benchHandler, verbose))
+	mux.Handle("/api", handle(apiHandler, verbose))
+	mux.Handle("/health", handle(healthHandler, verbose))
+	mux.Handle("/", handle(whoamiHandler, verbose))
+
+	if cert == "" || key == "" {
+		log.Printf("Starting up on port %s", port)
+
+		log.Fatal(http.ListenAndServe(":"+port, mux))
+	}
+
+	server := &http.Server{
+		Addr:    ":" + port,
+		Handler: mux,
+	}
+
+	if ca != "" {
+		server.TLSConfig = setupMutualTLS(ca)
+	}
+
+	log.Printf("Starting up with TLS on port %s", port)
+
+	log.Fatal(server.ListenAndServeTLS(cert, key))
+}
+
+func setupMutualTLS(ca string) *tls.Config {
+	clientCACert, err := os.ReadFile(ca)
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	clientCertPool := x509.NewCertPool()
+	clientCertPool.AppendCertsFromPEM(clientCACert)
+
+	tlsConfig := &tls.Config{
+		ClientAuth:               tls.RequireAndVerifyClientCert,
+		ClientCAs:                clientCertPool,
+		PreferServerCipherSuites: true,
+		MinVersion:               tls.VersionTLS12,
+	}
+
+	return tlsConfig
+}
+
+func handle(next http.HandlerFunc, verbose bool) http.Handler {
+	if !verbose {
+		return next
+	}
+
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		next(w, r)
+
+		// <remote_IP_address> - [<timestamp>] "<request_method> <request_path> <request_protocol>" -
+		log.Printf("%s - - [%s] \"%s %s %s\" - -", r.RemoteAddr, time.Now().Format("02/Jan/2006:15:04:05 -0700"), r.Method, r.URL.Path, r.Proto)
+	})
+}
+
+func benchHandler(w http.ResponseWriter, _ *http.Request) {
+	w.Header().Set("Connection", "keep-alive")
+	w.Header().Set("Content-Type", "text/plain")
+	_, _ = fmt.Fprint(w, "1")
+}
+
+func echoHandler(w http.ResponseWriter, r *http.Request) {
+	conn, err := upgrader.Upgrade(w, r, nil)
+	if err != nil {
+		log.Println(err)
+		return
+	}
+
+	for {
+		messageType, p, err := conn.ReadMessage()
+		if err != nil {
+			return
+		}
+
+		printBinary(p)
+		err = conn.WriteMessage(messageType, p)
+		if err != nil {
+			return
+		}
+	}
 }

 func printBinary(s []byte) {
@ -46,113 +164,175 @@ func printBinary(s []byte) {
 	}
 	fmt.Printf("\n")
 }
-func benchHandler(w http.ResponseWriter, r *http.Request) {
-	w.Header().Set("Connection", "keep-alive")
-	w.Header().Set("Content-Type", "text/plain")
-	fmt.Fprint(w, "1")
-}
-func echoHandler(w http.ResponseWriter, r *http.Request) {
-	conn, err := upgrader.Upgrade(w, r, nil)
+
+func dataHandler(w http.ResponseWriter, r *http.Request) {
+	queryParams := r.URL.Query()
+
+	size, err := strconv.ParseInt(queryParams.Get("size"), 10, 64)
 	if err != nil {
-		log.Println(err)
+		size = 1
+	}
+	if size < 0 {
+		size = 0
+	}
+
+	unit := queryParams.Get("unit")
+	switch strings.ToLower(unit) {
+	case "kb":
+		size *= KB
+	case "mb":
+		size *= MB
+	case "gb":
+		size *= GB
+	case "tb":
+		size *= TB
+	}
+
+	attachment, err := strconv.ParseBool(queryParams.Get("attachment"))
+	if err != nil {
+		attachment = false
+	}
+
+	content := &contentReader{size: size}
+
+	if attachment {
+		w.Header().Set("Content-Disposition", "Attachment")
+		http.ServeContent(w, r, "data.txt", time.Now(), content)
 		return
 	}
-	for {
-		messageType, p, err := conn.ReadMessage()
-		if err != nil {
+
+	if _, err := io.Copy(w, content); err != nil {
+		http.Error(w, err.Error(), http.StatusInternalServerError)
 		return
 	}
-		printBinary(p)
-		err = conn.WriteMessage(messageType, p)
-		if err != nil {
-			return
-		}
-	}
 }

-func whoamI(w http.ResponseWriter, req *http.Request) {
-	u, _ := url.Parse(req.URL.String())
-	queryParams := u.Query()
+func whoamiHandler(w http.ResponseWriter, r *http.Request) {
+	queryParams := r.URL.Query()
+
 	wait := queryParams.Get("wait")
-	if len(wait) > 0 {
+	if wait != "" {
 		duration, err := time.ParseDuration(wait)
 		if err == nil {
 			time.Sleep(duration)
 		}
 	}
-	hostname, _ := os.Hostname()
-	fmt.Fprintln(w, "Hostname:", hostname)
-	ifaces, _ := net.Interfaces()
-	for _, i := range ifaces {
-		addrs, _ := i.Addrs()
-		// handle err
-		for _, addr := range addrs {
-			var ip net.IP
-			switch v := addr.(type) {
-			case *net.IPNet:
-				ip = v.IP
-			case *net.IPAddr:
-				ip = v.IP
-			}
-			fmt.Fprintln(w, "IP:", ip)
-		}
-	}
-	req.Write(w)
+
+	if name != "" {
+		_, _ = fmt.Fprintln(w, "Name:", name)
 	}

-func api(w http.ResponseWriter, req *http.Request) {
 	hostname, _ := os.Hostname()
-	data := struct {
-		Hostname string      `json:"hostname,omitempty"`
-		IP       []string    `json:"ip,omitempty"`
-		Headers  http.Header `json:"headers,omitempty"`
-	}{
-		hostname,
-		[]string{},
-		req.Header,
+	_, _ = fmt.Fprintln(w, "Hostname:", hostname)
+
+	for _, ip := range getIPs() {
+		_, _ = fmt.Fprintln(w, "IP:", ip)
 	}

-	ifaces, _ := net.Interfaces()
-	for _, i := range ifaces {
-		addrs, _ := i.Addrs()
-		// handle err
-		for _, addr := range addrs {
-			var ip net.IP
-			switch v := addr.(type) {
-			case *net.IPNet:
-				ip = v.IP
-			case *net.IPAddr:
-				ip = v.IP
+	_, _ = fmt.Fprintln(w, "RemoteAddr:", r.RemoteAddr)
+	if err := r.Write(w); err != nil {
+		http.Error(w, err.Error(), http.StatusInternalServerError)
+		return
 	}
-			data.IP = append(data.IP, ip.String())
+
+	if ok, _ := strconv.ParseBool(queryParams.Get("env")); ok {
+		for _, env := range os.Environ() {
+			_, _ = fmt.Fprintln(w, env)
 		}
 	}
-	json.NewEncoder(w).Encode(data)
+}
+
+func apiHandler(w http.ResponseWriter, r *http.Request) {
+	queryParams := r.URL.Query()
+
+	hostname, _ := os.Hostname()
+
+	environ := make(map[string]string)
+
+	if ok, _ := strconv.ParseBool(queryParams.Get("env")); ok {
+		for _, env := range os.Environ() {
+			before, after, _ := strings.Cut(env, "=")
+			environ[before] = after
+		}
+	}
+
+	data := Data{
+		Hostname:   hostname,
+		IP:         getIPs(),
+		Headers:    r.Header,
+		URL:        r.URL.RequestURI(),
+		Host:       r.Host,
+		Method:     r.Method,
+		Name:       name,
+		RemoteAddr: r.RemoteAddr,
+		Environ:    environ,
+	}
+
+	w.Header().Set("Content-Type", "application/json")
+	if err := json.NewEncoder(w).Encode(data); err != nil {
+		http.Error(w, err.Error(), http.StatusInternalServerError)
+		return
+	}
 }

 type healthState struct {
 	StatusCode int
 }

-var currentHealthState = healthState{200}
-var mutexHealthState = &sync.RWMutex{}
+var (
+	currentHealthState = healthState{http.StatusOK}
+	mutexHealthState   = &sync.RWMutex{}
+)

 func healthHandler(w http.ResponseWriter, req *http.Request) {
 	if req.Method == http.MethodPost {
 		var statusCode int
-		err := json.NewDecoder(req.Body).Decode(&statusCode)
-		if err != nil {
-			w.WriteHeader(http.StatusBadRequest)
-			w.Write([]byte(err.Error()))
-		} else {
+
+		if err := json.NewDecoder(req.Body).Decode(&statusCode); err != nil {
+			http.Error(w, err.Error(), http.StatusBadRequest)
+			return
+		}
+
 		fmt.Printf("Update health check status code [%d]\n", statusCode)
+
 		mutexHealthState.Lock()
 		defer mutexHealthState.Unlock()
 		currentHealthState.StatusCode = statusCode
-		}
 	} else {
 		mutexHealthState.RLock()
 		defer mutexHealthState.RUnlock()
 		w.WriteHeader(currentHealthState.StatusCode)
 	}
 }
+
+func getEnv(key, fallback string) string {
+	value := os.Getenv(key)
+	if value == "" {
+		return fallback
+	}
+	return value
+}
+
+func getIPs() []string {
+	var ips []string
+
+	ifaces, _ := net.Interfaces()
+	for _, i := range ifaces {
+		addrs, _ := i.Addrs()
+		// handle err
+		for _, addr := range addrs {
+			var ip net.IP
+			switch v := addr.(type) {
+			case *net.IPNet:
+				ip = v.IP
+			case *net.IPAddr:
+				ip = v.IP
+			}
+			if ip != nil {
+				ips = append(ips, ip.String())
+			}
+		}
+	}
+
+	return ips
+}
--- a/build.sh
+++ b/build.sh
@ -1,3 +0,0 @@
-#!/bin/sh
-CGO_ENABLED=0 go build -a --installsuffix cgo --ldflags="-s" -o whoamI
-docker build -t emilevauge/whoami .
--- a/buildx.Dockerfile
+++ b/buildx.Dockerfile
@ -0,0 +1,17 @@
+# syntax=docker/dockerfile:1.2
+FROM golang:1-alpine as builder
+
+RUN apk --no-cache --no-progress add git ca-certificates tzdata make \
+    && update-ca-certificates \
+    && rm -rf /var/cache/apk/*
+
+# syntax=docker/dockerfile:1.2
+# Create a minimal container to run a Golang static binary
+FROM scratch
+
+COPY --from=builder /usr/share/zoneinfo /usr/share/zoneinfo
+COPY --from=builder /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/
+COPY whoami /
+
+ENTRYPOINT ["/whoami"]
+EXPOSE 80
--- a/content.go
+++ b/content.go
@ -0,0 +1,66 @@
+package main
+
+import (
+	"errors"
+	"io"
+)
+
+const contentCharset = "-ABCDEFGHIJKLMNOPQRSTUVWXYZ"
+
+type contentReader struct {
+	size int64
+	cur  int64
+}
+
+// Read implements the io.Read interface.
+func (r *contentReader) Read(p []byte) (int, error) {
+	length := r.size - 1
+
+	if r.cur >= length {
+		return 0, io.EOF
+	}
+	if len(p) == 0 {
+		return 0, nil
+	}
+
+	var n int
+	if r.cur == 0 {
+		p[n] = '|'
+		r.cur++
+		n++
+	}
+
+	for n < len(p) && r.cur <= length {
+		p[n] = contentCharset[int(r.cur)%len(contentCharset)]
+		r.cur++
+		n++
+	}
+
+	if r.cur >= length {
+		p[n-1] = '|'
+	}
+
+	return n, nil
+}
+
+// Seek implements the io.Seek interface.
+func (r *contentReader) Seek(offset int64, whence int) (int64, error) {
+	switch whence {
+	default:
+		return 0, errors.New("seek: invalid whence")
+	case io.SeekStart:
+		offset += 0
+	case io.SeekCurrent:
+		offset += r.cur
+	case io.SeekEnd:
+		offset += r.size - 1
+	}
+
+	if offset < 0 {
+		return 0, errors.New("seek: invalid offset")
+	}
+
+	r.cur = offset
+
+	return offset, nil
+}
--- a/content_test.go
+++ b/content_test.go
@ -0,0 +1,82 @@
+package main
+
+import (
+	"io"
+	"testing"
+)
+
+func Test_contentReader_Read(t *testing.T) {
+	tests := []struct {
+		name    string
+		size    int64
+		content string
+	}{
+		{
+			name:    "simple",
+			size:    40,
+			content: "|ABCDEFGHIJKLMNOPQRSTUVWXYZ-ABCDEFGHIJK|",
+		},
+	}
+
+	for _, test := range tests {
+		test := test
+		t.Run(test.name, func(t *testing.T) {
+			t.Parallel()
+
+			d := &contentReader{size: test.size}
+
+			b, err := io.ReadAll(d)
+			if err != nil {
+				t.Errorf("contentReader.Read() error = %v", err)
+				return
+			}
+
+			if string(b) != test.content {
+				t.Errorf("return content does not match expected value: got %s want %s", b, test.content)
+			}
+		})
+	}
+}
+
+func Test_contentReader_ReadSeek(t *testing.T) {
+	tests := []struct {
+		name       string
+		offset     int64
+		seekWhence int
+		size       int64
+		content    string
+	}{
+		{
+			name:       "simple",
+			offset:     10,
+			seekWhence: io.SeekCurrent,
+			size:       40,
+			content:    "JKLMNOPQRSTUVWXYZ-ABCDEFGHIJK|",
+		},
+	}
+
+	for _, test := range tests {
+		test := test
+		t.Run(test.name, func(t *testing.T) {
+			t.Parallel()
+
+			d := &contentReader{size: test.size}
+
+			_, err := d.Seek(test.offset, test.seekWhence)
+			if err != nil {
+				t.Errorf("contentReader.Seek() error = %v", err)
+				return
+			}
+
+			b, err := io.ReadAll(d)
+			if err != nil {
+				t.Errorf("contentReader.Read() error = %v", err)
+				return
+			}
+
+			if string(b) != test.content {
+				t.Errorf("return content does not match expected value: got %s want %s", b, test.content)
+			}
+		})
+	}
+}
--- a/go.mod
+++ b/go.mod
@ -0,0 +1,7 @@
+module github.com/traefik/whoami
+
+go 1.21
+
+require github.com/gorilla/websocket v1.5.1
+
+require golang.org/x/net v0.25.0 // indirect
--- a/go.sum
+++ b/go.sum
@ -0,0 +1,4 @@
+github.com/gorilla/websocket v1.5.1 h1:gmztn0JnHVt9JZquRuzLw3g4wouNVzKL15iLr/zn/QY=
+github.com/gorilla/websocket v1.5.1/go.mod h1:x3kM2JMyaluk02fnUJpQuwD2dCS5NDG2ZHL0uE0tcaY=
+golang.org/x/net v0.25.0 h1:d/OCCoBEUq33pjydKrGQhw7IlUPI2Oylr+8qLx49kac=
+golang.org/x/net v0.25.0/go.mod h1:JkAGAh7GEvH74S6FOH42FLoXpXbE/aqXSrIQjXgsiwM=
Author	SHA1	Message	Date
Ludovic Fernandez	dec1ed84e3	chore: update CI, dependencies, and linter	2024-05-07 17:36:04 +02:00
Alfonso Montero López	a7324d7c32	docs: document `/api` extra fields (#83 ) Co-authored-by: Fernandez Ludovic <ldez@users.noreply.github.com>	2023-11-29 22:33:42 +01:00
Fernandez Ludovic	c081c06239	chore: update Go, and linter	2023-08-21 23:27:26 +02:00
Fernandez Ludovic	87f25fc35b	fix: default port	2023-07-12 16:00:34 +02:00
Fernandez Ludovic	932937c4e8	feat: add query parameter to print env vars	2023-07-08 15:55:47 +02:00
Fernandez Ludovic	eeea0e75c9	chore: update Go, and linter	2023-07-08 15:51:07 +02:00
Fernandez Ludovic	09b74d7912	feat: add RemoteAddr to /api	2023-07-08 15:32:24 +02:00
Fernandez Ludovic	5a6136c5e7	chore: add getIPs function	2023-07-08 15:23:16 +02:00
Fernandez Ludovic	f3f1750527	chore: add ghcr	2023-03-16 10:15:10 +01:00
iesrbt	30767b10c5	added WebSocket origin check	2023-02-17 10:18:14 +01:00
Harrys Kavan	c6b17b0ee6	docs: update compose example	2022-12-08 13:14:05 +01:00
Fernandez Ludovic	227c61f841	chore: update actions/cache to v3	2022-10-21 16:15:16 +02:00
Fernandez Ludovic	27a158b32e	chore: add more opencontainers labels	2022-10-15 16:08:11 +02:00
Fernandez Ludovic	e597367368	chore: update linter	2022-10-15 15:38:42 +02:00
Fernandez Ludovic	bda49f6a9b	chore: add armv7 to Docker images	2022-10-15 15:38:07 +02:00
Fernandez Ludovic	3b2f295be2	chore: clean	2022-10-09 17:19:42 +02:00
Fernandez Ludovic	098845bccd	chore: QEMU	2022-09-10 17:08:17 +02:00
Fernandez Ludovic	0f526f05ab	chore: enforce platform	2022-09-10 17:00:19 +02:00
Fernandez Ludovic	24b1d1e4be	chore: add missing manifest	2022-09-10 16:48:40 +02:00
Fernandez Ludovic	1c1ad7d0f9	chore: keep it simple	2022-09-10 16:39:39 +02:00
Fernandez Ludovic	05efa96950	chore: push images	2022-09-10 16:37:19 +02:00
Fernandez Ludovic	46d1c2fa1a	chore: goreleaser and buildx	2022-09-10 16:30:59 +02:00
Fernandez Ludovic	9b1db3f461	chore: update Go, linter, CI	2022-09-10 12:29:58 +02:00
Richard Hillmann	2d6ebedb0f	feat: Replace data fillcontent with custom reader	2022-06-16 17:36:08 +02:00
Fernandez Ludovic	12d9acfdb3	chore: fix workflow	2022-02-13 16:11:18 +01:00
Fernandez Ludovic	537285b0b1	chore: clean workflow	2022-02-13 16:04:55 +01:00
Fernandez Ludovic	d23068be44	docs: update license	2022-02-13 15:55:00 +01:00
Pierre-Yves Aillet	c88402491b	add access logs	2022-02-13 15:50:07 +01:00
Fernandez Ludovic	36f93ee1a6	chore: update linter	2022-02-13 15:17:14 +01:00
Fernandez Ludovic	752a8492c7	docs: add cacert flag	2022-02-13 15:13:36 +01:00
Fernandez Ludovic	cfac507e9c	docs: improve documentation	2022-02-13 15:08:26 +01:00
Fernandez Ludovic	9a05fd8b8d	docs: improve examples	2022-02-13 14:58:02 +01:00
jtagcat	24e337834f	docs: add example with compose ft. flags (#51 ) Co-authored-by: Fernandez Ludovic <ldez@users.noreply.github.com>	2022-02-13 14:53:08 +01:00
Fernandez Ludovic	c36625cb56	chore: clean the start of the server	2021-12-03 18:55:03 +01:00
Fernandez Ludovic	a067f0ee4c	fix: rename WHOAMI_PORT to WHOAMI_PORT_NUMBER k8s creates env var based on service name, then WHOAMI_PORT exists and contains a URL instead of a number.	2021-12-03 18:49:47 +01:00
Fernandez Ludovic	28f833757e	chore: update linter, Go, and seihon	2021-12-03 10:13:32 +01:00
Juan Carlos García del Canto	04e535038e	Allow to pass port using an environment variable (#44 )	2021-10-27 14:51:23 +02:00
Fernandez Ludovic	09cbe40f67	chore: fix github action cache.	2021-07-17 05:58:42 +02:00
Douglas De Toni Machado	9baca36b2c	Add mutual TLS support	2021-06-24 16:54:12 +02:00
Fernandez Ludovic	6516f0ace6	chore: use GitHub Actions.	2020-12-05 16:51:32 +01:00
Romain	9378a1e1d2	Refactor: rebranding (#34 )	2020-09-16 09:53:35 +02:00
Fernandez Ludovic	1ef68230de	feat: display name in /api endpoint.	2020-06-20 19:55:29 +02:00
Fernandez Ludovic	b112c2640e	chore: update dependencies.	2020-05-09 17:31:09 +02:00
Fernandez Ludovic	90425015d5	chore: update linter.	2020-05-09 17:30:12 +02:00
Ludovic Fernandez	c4809bbe21	feat: add a name to be more human friendly. (#29 )	2020-03-11 13:11:36 +01:00
Fernandez Ludovic	741a054a0c	chore: update golangci-lint.	2020-02-28 01:09:42 +01:00
Yinon Avraham	9bf5b44f24	Fix typo in default unit for data size (#24 )	2019-10-20 23:53:38 +02:00
Yinon Avraham	bf0a64d4c2	Document the 'wait' and 'unit' query params (#23 )	2019-10-16 09:18:17 +02:00
Fernandez Ludovic	99174922cb	chore: allow to build tags on CI.	2019-10-06 20:07:51 +02:00
Fernandez Ludovic	c88b974352	feat: multi-arch Docker image.	2019-10-06 20:00:21 +02:00
Fernandez Ludovic	affedf56a2	chore: add linter.	2019-09-17 01:18:37 +02:00
Fernandez Ludovic	c0fd58d016	doc: improve readme.	2019-09-17 01:10:56 +02:00
Fernandez Ludovic	e5a3e4f79d	doc: improve readme.	2019-09-17 00:54:04 +02:00
Fernandez Ludovic	245b477e37	doc: improve readme.	2019-09-17 00:42:28 +02:00
Fernandez Ludovic	3e0740e194	chore: add CI configuration.	2019-09-17 00:40:58 +02:00
Fernandez Ludovic	d8aeedd011	doc: improve readme.	2019-09-17 00:39:02 +02:00
Fernandez Ludovic	510476dca9	chore: improve Dockerfile.	2019-09-17 00:38:14 +02:00
Fernandez Ludovic	fa9f921632	chore: update dependencies.	2019-09-17 00:37:29 +02:00
Michael	27713d1e8d	Update to go1.12 (#21 )	2019-09-03 11:41:03 +02:00
Michael	5e438f6f9e	Add remoteAddr information (#20 )	2019-09-03 11:40:33 +02:00
Fernandez Ludovic	48ed709a3a	refactor: code review.	2019-01-10 00:28:38 +01:00
Alan Scherger	c835c52085	Use go modules (#15 )	2019-01-09 23:58:52 +01:00
Ryan Campbell	2bc53608e9	add req.Host and req.Method to api handler response (#13 ) This is useful information to return when (for example) testing a reverse proxy.	2018-10-29 14:26:25 +01:00
Gérald Croës	90c7fab968	adds a /data path (#14 )	2018-10-29 14:25:39 +01:00
Ludovic Fernandez	2305eab132	Add badge	2018-10-18 00:27:48 +02:00
Ludovic Fernandez	0160af70f9	Create LICENSE	2018-10-18 00:07:50 +02:00
Ludovic Fernandez	72d3d9cd1c	New build system (#9 )	2018-08-09 11:05:36 +02:00
Gérald Croës	585d48ff07	Fixed the container name (#8 ) * Fixed the container name * whoamI -> whoami	2018-08-06 17:05:34 +02:00
Daniel Tomcej	c039b48727	Add TLS Option (#7 ) * add tls remove unused var * remove defaults	2018-07-30 21:43:23 +02:00