Enable benchHandler on "/bench/" in addition of "/bench"

Adding the trailing slash allows to trigger the bench handler for
performance measurements in situations where a trailing slash
character '/' is added to the request.

For example, in traefik addPrefix middleware, if you specify a
"/bench" prefix, a request on "http://localhost" will be transformed
from "GET /" to "GET /bench/" with no way to remove the trailing
'/' (at least without adding another rewrite rule, which would
modify measurements).

.github/workflows/ci.yml

@@ -1,49 +0,0 @@
-name: Main
-
-on:
-  push:
-    branches:
-      - master
-  pull_request:
-
-jobs:
-
-  main:
-    name: Main Process
-    runs-on: ubuntu-latest
-    env:
-      GO_VERSION: '1.20'
-      GOLANGCI_LINT_VERSION: v1.53.3
-      CGO_ENABLED: 0
-
-    steps:
-
-      # https://github.com/marketplace/actions/checkout
-      - name: Check out code
-        uses: actions/checkout@v3
-        with:
-          fetch-depth: 0
-
-      # https://github.com/marketplace/actions/setup-go-environment
-      - name: Set up Go ${{ env.GO_VERSION }}
-        uses: actions/setup-go@v4
-        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

.github/workflows/go-cross.yml

@@ -1,9 +1,5 @@
 name: Go Matrix
-on:
+on: [push, pull_request]
-  push:
-    branches:
-      - master
-  pull_request:
 
 jobs:
 
@@ -15,20 +11,33 @@ jobs:
 
     strategy:
       matrix:
-        go-version: [ 1.19, 1.x ]
+        go-version: [ 1.14, 1.15, 1.x ]
         os: [ubuntu-latest, macos-latest, windows-latest]
 
     steps:
-      # https://github.com/marketplace/actions/checkout
-      - name: Checkout code
-        uses: actions/checkout@v3
-
       # https://github.com/marketplace/actions/setup-go-environment
       - name: Set up Go ${{ matrix.go-version }}
-        uses: actions/setup-go@v4
+        uses: actions/setup-go@v2
         with:
           go-version: ${{ matrix.go-version }}
 
+      # https://github.com/marketplace/actions/checkout
+      - name: Checkout code
+        uses: actions/checkout@v2
+
+      # https://github.com/marketplace/actions/cache
+      - name: Cache Go modules
+        uses: actions/cache@v2
+        with:
+          path: |
+            ~/go/pkg/mod              # Module download cache
+            ~/.cache/go-build         # Build cache (Linux)
+            ~/Library/Caches/go-build # Build cache (Mac)
+            '%LocalAppData%\go-build' # Build cache (Windows)
+          key: ${{ runner.os }}-${{ matrix.go-version }}-go-${{ hashFiles('**/go.sum') }}
+          restore-keys: |
+            ${{ runner.os }}-${{ matrix.go-version }}-go-
+
       - name: Test
         run: go test -v -cover ./...
 

.github/workflows/main.yml

@@ -0,0 +1,81 @@
+name: Main
+
+on:
+  push:
+    branches:
+      - master
+    tags:
+      - v*
+  pull_request:
+
+jobs:
+
+  main:
+    name: Main Process
+    runs-on: ubuntu-latest
+    env:
+      GO_VERSION: 1.15
+      GOLANGCI_LINT_VERSION: v1.33.0
+      SEIHON_VERSION: v0.5.1
+      CGO_ENABLED: 0
+
+    steps:
+
+      # https://github.com/marketplace/actions/setup-go-environment
+      - name: Set up Go ${{ env.GO_VERSION }}
+        uses: actions/setup-go@v2
+        with:
+          go-version: ${{ env.GO_VERSION }}
+
+      # https://github.com/marketplace/actions/checkout
+      - name: Check out code
+        uses: actions/checkout@v2
+        with:
+          fetch-depth: 0
+
+      # https://github.com/marketplace/actions/cache
+      - name: Cache Go modules
+        uses: actions/cache@v2
+        with:
+          path: ~/go/pkg/mod
+          key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}
+          restore-keys: |
+            ${{ runner.os }}-go-
+
+      - name: Check and get dependencies
+        run: |
+          go mod tidy
+          git diff --exit-code go.mod
+          git diff --exit-code go.sum
+          go mod download
+
+      # 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
+
+      # Install Docker image multi-arch builder
+      - name: Install seihon ${{ env.SEIHON_VERSION }}
+        if: startsWith(github.ref, 'refs/tags/v')
+        run: |
+          curl -sSfL https://raw.githubusercontent.com/ldez/seihon/master/godownloader.sh | sh -s -- -b $(go env GOPATH)/bin ${SEIHON_VERSION}
+          seihon --version
+
+      - name: Docker Login
+        if: startsWith(github.ref, 'refs/tags/v')
+        env:
+          DOCKER_USERNAME: ${{ secrets.DOCKER_USERNAME }}
+          DOCKER_PASSWORD: ${{ secrets.DOCKER_PASSWORD }}
+        run: |
+          echo "${DOCKER_PASSWORD}" | docker login --username "${DOCKER_USERNAME}" --password-stdin
+
+      - name: Deploy Docker Images (seihon)
+        if: startsWith(github.ref, 'refs/tags/v')
+        run: make publish-images

.github/workflows/release.yml

@@ -1,55 +0,0 @@
-name: "Release a tag"
-on:
-  push:
-    tags:
-      - v*
-
-jobs:
-  release:
-    name: Release Process
-    runs-on: ubuntu-latest
-    env:
-      GO_VERSION: '1.20'
-      CGO_ENABLED: 0
-
-    steps:
-
-      # https://github.com/marketplace/actions/checkout
-      - name: Check out code
-        uses: actions/checkout@v3
-        with:
-          fetch-depth: 0
-
-      # https://github.com/marketplace/actions/setup-go-environment
-      - name: Set up Go ${{ env.GO_VERSION }}
-        uses: actions/setup-go@v4
-        with:
-          go-version: ${{ env.GO_VERSION }}
-
-      - name: dockerhub-login
-        uses: docker/login-action@v1
-        with:
-          username: ${{ secrets.DOCKER_USERNAME }}
-          password: ${{ secrets.DOCKER_PASSWORD }}
-
-      - name: ghcr-login
-        uses: docker/login-action@v1
-        with:
-          registry: ghcr.io
-          username: traefiker
-          password: ${{ secrets.GHCR_TOKEN }}
-
-      - name: Set up QEMU
-        uses: docker/setup-qemu-action@v2
-
-      - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v2
-
-      # https://goreleaser.com/ci/actions/
-      - name: Run GoReleaser
-        uses: goreleaser/goreleaser-action@v2
-        with:
-          version: latest
-          args: release --rm-dist
-        env:
-          GITHUB_TOKEN: ${{ secrets.GH_TOKEN_REPO }}

.gitignore

@@ -1,4 +1,3 @@
 .idea
 vendor/
 /whoami
-dist/

.golangci.toml

@@ -0,0 +1,49 @@
+[run]
+  deadline = "2m"
+  skip-files = []
+
+[linters-settings]
+
+  [linters-settings.govet]
+    check-shadowing = true
+
+  [linters-settings.gocyclo]
+    min-complexity = 12.0
+
+  [linters-settings.maligned]
+    suggest-new = true
+
+  [linters-settings.goconst]
+    min-len = 3.0
+    min-occurrences = 3.0
+
+  [linters-settings.misspell]
+    locale = "US"
+
+[linters]
+  enable-all = true
+  disable = [
+    "maligned",
+    "lll",
+    "gosec",
+    "dupl",
+    "prealloc",
+    "gochecknoglobals",
+    "gochecknoinits",
+    "gomnd",
+    "wsl",
+    "nlreturn",
+    "testpackage",
+    "paralleltest",
+    "tparallel",
+    "goerr113",
+    "wrapcheck",
+    "exhaustive",
+    "exhaustivestruct",
+  ]
+
+[issues]
+  exclude-use-default = false
+  max-per-linter = 0
+  max-same-issues = 0
+  exclude = []

.golangci.yml

@@ -1,96 +0,0 @@
-run:
-  timeout: 2m
-  skip-files: []
-
-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
-    - goerr113
-    - gomnd
-    - gosec
-    - lll
-    - nilnil
-    - nlreturn
-    - paralleltest
-    - prealloc
-    - testpackage
-    - tparallel
-    - varnamelen
-    - wrapcheck
-    - wsl
-
-issues:
-  exclude-use-default: false
-  max-per-linter: 0
-  max-same-issues: 0
-  exclude:
-    - 'package-comments: should have a package comment'

.goreleaser.yml

@@ -1,142 +0,0 @@
-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'

LICENSE

@@ -186,8 +186,8 @@
       same "printed page" as the copyright notice for easier
       identification within third-party archives.
 
-   Copyright [2015-2019] [Containous]
+   Copyright [2015-2018] [Containous]
-   Copyright [2020-2022] [Traefik Labs]
+   Copyright [2020] [Traefik Labs]
 
    Licensed under the Apache License, Version 2.0 (the "License");
    you may not use this file except in compliance with the License.

Makefile

@@ -1,4 +1,6 @@
-.PHONY: default check test build image
+.PHONY: default build image check publish-images
+
+TAG_NAME := $(shell git tag -l --contains HEAD)
 
 IMAGE_NAME := traefik/whoami
 
@@ -15,3 +17,6 @@ check:
 
 image:
 	docker build -t $(IMAGE_NAME) .
+
+publish-images:
+	seihon publish -v "$(TAG_NAME)" -v "latest" --image-name $(IMAGE_NAME) --dry-run=false

README.md

@@ -3,58 +3,27 @@
 [![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.
+Tiny Go webserver that prints os information and HTTP request to output
 
 ## Usage
 
 ### Paths
 
-#### `/[?wait=d]`
+- `/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.
-Returns the whoami information (request and network information).
+- `/bench`: always return the same response (`1`).
-
+- `/[?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 `wait` query parameter can be provided to tell the server to wait before sending the response.
+- `/api`: returns the whoami information as JSON.
-The duration is expected in Go's [`time.Duration`](https://golang.org/pkg/time/#ParseDuration) format (e.g. `/?wait=100ms` to wait 100 milliseconds).
+- `/health`: heath check
-
+    - `GET`, `HEAD`, ...: returns a response with the status code defined by the `POST`
-The optional `env` query parameter can be set to `true` to add the environment variables to the response.
+    - `POST`: changes the status code of the `GET` (`HEAD`, ...) response.
-
-#### `/api`
-
-Returns the whoami 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.
-| `cert`    |                      | Give me a certificate.                  |
+- `port`: give me a port number. (default: 80)
-| `key`     |                      | Give me a key.                          |
+- `name`: give me a name. (it can be also defined with `WHOAMI_NAME` environment variable)
-| `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
 
@@ -97,17 +66,5 @@ $ curl -v http://localhost:80/health
 ```
 
 ```console
-docker run -d -P -v ./certs:/certs --name iamfoo traefik/whoami --cert /certs/example.cert --key /certs/example.key
+docker run -d -P -v ./certs:/certs --name iamfoo traefik/whoami --cert /certs/cert.cer --key /certs/key.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
 ```

app.go

@@ -1,8 +1,7 @@
 package main
 
 import (
-	"crypto/tls"
+	"bytes"
-	"crypto/x509"
 	"encoding/json"
 	"flag"
 	"fmt"
@@ -10,6 +9,7 @@ import (
 	"log"
 	"net"
 	"net/http"
+	"net/url"
 	"os"
 	"strconv"
 	"strings"
@@ -28,106 +28,42 @@ const (
 	TB
 )
 
-var upgrader = websocket.Upgrader{
-	ReadBufferSize:  1024,
-	WriteBufferSize: 1024,
-	CheckOrigin: func(r *http.Request) bool {
-		return true
-	},
-}
-
 var (
-	cert    string
+	cert string
-	key     string
+	key  string
-	ca      string
+	port string
-	port    string
+	name 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", "80", "give me a port number")
-	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.
+var upgrader = websocket.Upgrader{
-type Data struct {
+	ReadBufferSize:  1024,
-	Hostname   string            `json:"hostname,omitempty"`
+	WriteBufferSize: 1024,
-	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() {
 	flag.Parse()
 
-	mux := http.NewServeMux()
+	http.HandleFunc("/data", dataHandler)
-	mux.Handle("/data", handle(dataHandler, verbose))
+	http.HandleFunc("/echo", echoHandler)
-	mux.Handle("/echo", handle(echoHandler, verbose))
+	http.HandleFunc("/bench", benchHandler)
-	mux.Handle("/bench", handle(benchHandler, verbose))
+	http.HandleFunc("/bench/", benchHandler)
-	mux.Handle("/api", handle(apiHandler, verbose))
+	http.HandleFunc("/", whoamiHandler)
-	mux.Handle("/health", handle(healthHandler, verbose))
+	http.HandleFunc("/api", apiHandler)
-	mux.Handle("/", handle(whoamiHandler, verbose))
+	http.HandleFunc("/health", healthHandler)
 
-	if cert == "" || key == "" {
+	fmt.Println("Starting up on port " + port)
-		log.Printf("Starting up on port %s", port)
 
-		log.Fatal(http.ListenAndServe(":"+port, mux))
+	if len(cert) > 0 && len(key) > 0 {
+		log.Fatal(http.ListenAndServeTLS(":"+port, cert, key, nil))
 	}
-
+	log.Fatal(http.ListenAndServe(":"+port, nil))
-	server := &http.Server{
-		Addr:    ":" + port,
-		Handler: mux,
-	}
-
-	if len(ca) > 0 {
-		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) {
@@ -166,7 +102,8 @@ func printBinary(s []byte) {
 }
 
 func dataHandler(w http.ResponseWriter, r *http.Request) {
-	queryParams := r.URL.Query()
+	u, _ := url.Parse(r.URL.String())
+	queryParams := u.Query()
 
 	size, err := strconv.ParseInt(queryParams.Get("size"), 10, 64)
 	if err != nil {
@@ -193,7 +130,7 @@ func dataHandler(w http.ResponseWriter, r *http.Request) {
 		attachment = false
 	}
 
-	content := &contentReader{size: size}
+	content := fillContent(size)
 
 	if attachment {
 		w.Header().Set("Content-Disposition", "Attachment")
@@ -207,10 +144,9 @@ func dataHandler(w http.ResponseWriter, r *http.Request) {
 	}
 }
 
-func whoamiHandler(w http.ResponseWriter, r *http.Request) {
+func whoamiHandler(w http.ResponseWriter, req *http.Request) {
-	queryParams := r.URL.Query()
+	u, _ := url.Parse(req.URL.String())
-
+	wait := u.Query().Get("wait")
-	wait := queryParams.Get("wait")
 	if len(wait) > 0 {
 		duration, err := time.ParseDuration(wait)
 		if err == nil {
@@ -225,47 +161,66 @@ func whoamiHandler(w http.ResponseWriter, r *http.Request) {
 	hostname, _ := os.Hostname()
 	_, _ = fmt.Fprintln(w, "Hostname:", hostname)
 
-	for _, ip := range getIPs() {
+	ifaces, _ := net.Interfaces()
-		_, _ = fmt.Fprintln(w, "IP:", ip)
+	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)
+		}
 	}
 
-	_, _ = fmt.Fprintln(w, "RemoteAddr:", r.RemoteAddr)
+	_, _ = fmt.Fprintln(w, "RemoteAddr:", req.RemoteAddr)
-	if err := r.Write(w); err != nil {
+	if err := req.Write(w); err != nil {
 		http.Error(w, err.Error(), http.StatusInternalServerError)
 		return
 	}
-
-	if ok, _ := strconv.ParseBool(queryParams.Get("env")); ok {
-		for _, env := range os.Environ() {
-			_, _ = fmt.Fprintln(w, env)
-		}
-	}
 }
 
-func apiHandler(w http.ResponseWriter, r *http.Request) {
+func apiHandler(w http.ResponseWriter, req *http.Request) {
-	queryParams := r.URL.Query()
-
 	hostname, _ := os.Hostname()
 
-	environ := make(map[string]string)
+	data := struct {
-
+		Hostname string      `json:"hostname,omitempty"`
-	if ok, _ := strconv.ParseBool(queryParams.Get("env")); ok {
+		IP       []string    `json:"ip,omitempty"`
-		for _, env := range os.Environ() {
+		Headers  http.Header `json:"headers,omitempty"`
-			before, after, _ := strings.Cut(env, "=")
+		URL      string      `json:"url,omitempty"`
-			environ[before] = after
+		Host     string      `json:"host,omitempty"`
-		}
+		Method   string      `json:"method,omitempty"`
+		Name     string      `json:"name,omitempty"`
+	}{
+		Hostname: hostname,
+		IP:       []string{},
+		Headers:  req.Header,
+		URL:      req.URL.RequestURI(),
+		Host:     req.Host,
+		Method:   req.Method,
+		Name:     name,
 	}
 
-	data := Data{
+	ifaces, _ := net.Interfaces()
-		Hostname:   hostname,
+	for _, i := range ifaces {
-		IP:         getIPs(),
+		addrs, _ := i.Addrs()
-		Headers:    r.Header,
+		// handle err
-		URL:        r.URL.RequestURI(),
+		for _, addr := range addrs {
-		Host:       r.Host,
+			var ip net.IP
-		Method:     r.Method,
+			switch v := addr.(type) {
-		Name:       name,
+			case *net.IPNet:
-		RemoteAddr: r.RemoteAddr,
+				ip = v.IP
-		Environ:    environ,
+			case *net.IPAddr:
+				ip = v.IP
+			}
+			if ip != nil {
+				data.IP = append(data.IP, ip.String())
+			}
+		}
 	}
 
 	w.Header().Set("Content-Type", "application/json")
@@ -305,34 +260,18 @@ func healthHandler(w http.ResponseWriter, req *http.Request) {
 	}
 }
 
-func getEnv(key, fallback string) string {
+func fillContent(length int64) io.ReadSeeker {
-	value := os.Getenv(key)
+	charset := "-ABCDEFGHIJKLMNOPQRSTUVWXYZ"
-	if value == "" {
+	b := make([]byte, length)
-		return fallback
-	}
-	return value
-}
 
-func getIPs() []string {
+	for i := range b {
-	var ips []string
+		b[i] = charset[i%len(charset)]
-
-	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
+	if length > 0 {
+		b[0] = '|'
+		b[length-1] = '|'
+	}
+
+	return bytes.NewReader(b)
 }

content.go

@@ -1,66 +0,0 @@
-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
-}

content_test.go

@@ -1,82 +0,0 @@
-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)
-			}
-		})
-	}
-}

go.mod

@@ -1,5 +1,5 @@
 module github.com/traefik/whoami
 
-go 1.20
+go 1.13
 
 require github.com/gorilla/websocket v1.4.2

tmpl.Dockerfile

@@ -1,17 +1,25 @@
-# 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
+WORKDIR /go/whoami
-# Create a minimal container to run a Golang static binary
+
+# Download go modules
+COPY go.mod .
+COPY go.sum .
+RUN GO111MODULE=on GOPROXY=https://proxy.golang.org go mod download
+
+COPY . .
+
+RUN GOARCH={{ .GoARCH }} GOARM={{ .GoARM }} make build
+
 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 /
+COPY --from=builder /go/whoami/whoami .
 
 ENTRYPOINT ["/whoami"]
 EXPOSE 80