update

Co-authored-by: Fernandez Ludovic <ldez@users.noreply.github.com>

.github/workflows/go-cross.yml

@@ -1,45 +0,0 @@
-name: Go Matrix
-on: [push, pull_request]
-
-jobs:
-
-  cross:
-    name: Go
-    runs-on: ${{ matrix.os }}
-    env:
-      CGO_ENABLED: 0
-
-    strategy:
-      matrix:
-        go-version: [ 1.14, 1.15, 1.x ]
-        os: [ubuntu-latest, macos-latest, windows-latest]
-
-    steps:
-      # https://github.com/marketplace/actions/setup-go-environment
-      - name: Set up Go ${{ matrix.go-version }}
-        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 ./...
-
-      - name: Build
-        run: go build -v -ldflags "-s -w" -trimpath

.github/workflows/main.yml

@@ -1,81 +0,0 @@
-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

.gitignore

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

.golangci.toml

@@ -1,49 +0,0 @@
-[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 = []

Dockerfile

@@ -1,26 +1,13 @@
-FROM golang:1-alpine as builder
+FROM golang: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
 
+WORKDIR /app
 COPY . .
 
-RUN make build
+RUN go env -w GOPROXY=https://goproxy.cn,direct
+RUN go mod tidy
+RUN go build -o whoami
 
-# Create a minimal container to run a Golang static binary
 FROM scratch
-
+COPY --from=builder /app/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

LICENSE

@@ -1,202 +0,0 @@
-                                 Apache License
-                           Version 2.0, January 2004
-                        http://www.apache.org/licenses/
-
-   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
-
-   1. Definitions.
-
-      "License" shall mean the terms and conditions for use, reproduction,
-      and distribution as defined by Sections 1 through 9 of this document.
-
-      "Licensor" shall mean the copyright owner or entity authorized by
-      the copyright owner that is granting the License.
-
-      "Legal Entity" shall mean the union of the acting entity and all
-      other entities that control, are controlled by, or are under common
-      control with that entity. For the purposes of this definition,
-      "control" means (i) the power, direct or indirect, to cause the
-      direction or management of such entity, whether by contract or
-      otherwise, or (ii) ownership of fifty percent (50%) or more of the
-      outstanding shares, or (iii) beneficial ownership of such entity.
-
-      "You" (or "Your") shall mean an individual or Legal Entity
-      exercising permissions granted by this License.
-
-      "Source" form shall mean the preferred form for making modifications,
-      including but not limited to software source code, documentation
-      source, and configuration files.
-
-      "Object" form shall mean any form resulting from mechanical
-      transformation or translation of a Source form, including but
-      not limited to compiled object code, generated documentation,
-      and conversions to other media types.
-
-      "Work" shall mean the work of authorship, whether in Source or
-      Object form, made available under the License, as indicated by a
-      copyright notice that is included in or attached to the work
-      (an example is provided in the Appendix below).
-
-      "Derivative Works" shall mean any work, whether in Source or Object
-      form, that is based on (or derived from) the Work and for which the
-      editorial revisions, annotations, elaborations, or other modifications
-      represent, as a whole, an original work of authorship. For the purposes
-      of this License, Derivative Works shall not include works that remain
-      separable from, or merely link (or bind by name) to the interfaces of,
-      the Work and Derivative Works thereof.
-
-      "Contribution" shall mean any work of authorship, including
-      the original version of the Work and any modifications or additions
-      to that Work or Derivative Works thereof, that is intentionally
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-      the copyright owner. For the purposes of this definition, "submitted"
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-      to the Licensor or its representatives, including but not limited to
-      communication on electronic mailing lists, source code control systems,
-      and issue tracking systems that are managed by, or on behalf of, the
-      Licensor for the purpose of discussing and improving the Work, but
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-      designated in writing by the copyright owner as "Not a Contribution."
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-      on behalf of whom a Contribution has been received by Licensor and
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-      Work and such Derivative Works in Source or Object form.
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-          that such additional attribution notices cannot be construed
-          as modifying the License.
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-      You may add Your own copyright statement to Your modifications and
-      may provide additional or different license terms and conditions
-      for use, reproduction, or distribution of Your modifications, or
-      for any such Derivative Works as a whole, provided Your use,
-      reproduction, and distribution of the Work otherwise complies with
-      the conditions stated in this License.
-
-   5. Submission of Contributions. Unless You explicitly state otherwise,
-      any Contribution intentionally submitted for inclusion in the Work
-      by You to the Licensor shall be under the terms and conditions of
-      this License, without any additional terms or conditions.
-      Notwithstanding the above, nothing herein shall supersede or modify
-      the terms of any separate license agreement you may have executed
-      with Licensor regarding such Contributions.
-
-   6. Trademarks. This License does not grant permission to use the trade
-      names, trademarks, service marks, or product names of the Licensor,
-      except as required for reasonable and customary use in describing the
-      origin of the Work and reproducing the content of the NOTICE file.
-
-   7. Disclaimer of Warranty. Unless required by applicable law or
-      agreed to in writing, Licensor provides the Work (and each
-      Contributor provides its Contributions) on an "AS IS" BASIS,
-      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
-      implied, including, without limitation, any warranties or conditions
-      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
-      PARTICULAR PURPOSE. You are solely responsible for determining the
-      appropriateness of using or redistributing the Work and assume any
-      risks associated with Your exercise of permissions under this License.
-
-   8. Limitation of Liability. In no event and under no legal theory,
-      whether in tort (including negligence), contract, or otherwise,
-      unless required by applicable law (such as deliberate and grossly
-      negligent acts) or agreed to in writing, shall any Contributor be
-      liable to You for damages, including any direct, indirect, special,
-      incidental, or consequential damages of any character arising as a
-      result of this License or out of the use or inability to use the
-      Work (including but not limited to damages for loss of goodwill,
-      work stoppage, computer failure or malfunction, or any and all
-      other commercial damages or losses), even if such Contributor
-      has been advised of the possibility of such damages.
-
-   9. Accepting Warranty or Additional Liability. While redistributing
-      the Work or Derivative Works thereof, You may choose to offer,
-      and charge a fee for, acceptance of support, warranty, indemnity,
-      or other liability obligations and/or rights consistent with this
-      License. However, in accepting such obligations, You may act only
-      on Your own behalf and on Your sole responsibility, not on behalf
-      of any other Contributor, and only if You agree to indemnify,
-      defend, and hold each Contributor harmless for any liability
-      incurred by, or claims asserted against, such Contributor by reason
-      of your accepting any such warranty or additional liability.
-
-   END OF TERMS AND CONDITIONS
-
-   APPENDIX: How to apply the Apache License to your work.
-
-      To apply the Apache License to your work, attach the following
-      boilerplate notice, with the fields enclosed by brackets "[]"
-      replaced with your own identifying information. (Don't include
-      the brackets!)  The text should be enclosed in the appropriate
-      comment syntax for the file format. We also recommend that a
-      file or class name and description of purpose be included on the
-      same "printed page" as the copyright notice for easier
-      identification within third-party archives.
-
-   Copyright [2015-2018] [Containous]
-   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.
-   You may obtain a copy of the License at
-
-       http://www.apache.org/licenses/LICENSE-2.0
-
-   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.

Makefile

@@ -1,22 +0,0 @@
-.PHONY: default build image check publish-images
-
-TAG_NAME := $(shell git tag -l --contains HEAD)
-
-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 $(IMAGE_NAME) .
-
-publish-images:
-	seihon publish -v "$(TAG_NAME)" -v "latest" --image-name $(IMAGE_NAME) --dry-run=false

README.md

@@ -3,27 +3,58 @@
 [![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
 
-- `/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).
+#### `/[?wait=d]`
-- `/echo`: webSocket echo.
+
-- `/bench`: always return the same response (`1`).
+Returns the whoami information (request and network information).
-- `/[?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).
+
-- `/api`: returns the whoami information as JSON.
+The optional `wait` query parameter can be provided to tell the server to wait before sending the response.
-- `/health`: heath check
+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
 
-- `cert`: give me a certificate.
+| Flag      | Env var              | Description                             |
-- `key`: give me a key.
+|-----------|----------------------|-----------------------------------------|
-- `port`: give me a port number. (default: 80)
+| `cert`    |                      | Give me a certificate.                  |
-- `name`: give me a name. (it can be also defined with `WHOAMI_NAME` environment variable)
+| `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
 
@@ -66,5 +97,17 @@ $ curl -v http://localhost:80/health
 ```
 
 ```console
-docker run -d -P -v ./certs:/certs --name iamfoo traefik/whoami --cert /certs/cert.cer --key /certs/key.key
+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
 ```

app.go

@@ -1,277 +0,0 @@
-package main
-
-import (
-	"bytes"
-	"encoding/json"
-	"flag"
-	"fmt"
-	"io"
-	"log"
-	"net"
-	"net/http"
-	"net/url"
-	"os"
-	"strconv"
-	"strings"
-	"sync"
-	"time"
-
-	"github.com/gorilla/websocket"
-)
-
-// Units.
-const (
-	_        = iota
-	KB int64 = 1 << (10 * iota)
-	MB
-	GB
-	TB
-)
-
-var (
-	cert string
-	key  string
-	port string
-	name string
-)
-
-func init() {
-	flag.StringVar(&cert, "cert", "", "give me a certificate")
-	flag.StringVar(&key, "key", "", "give me a key")
-	flag.StringVar(&port, "port", "80", "give me a port number")
-	flag.StringVar(&name, "name", os.Getenv("WHOAMI_NAME"), "give me a name")
-}
-
-var upgrader = websocket.Upgrader{
-	ReadBufferSize:  1024,
-	WriteBufferSize: 1024,
-}
-
-func main() {
-	flag.Parse()
-
-	http.HandleFunc("/data", dataHandler)
-	http.HandleFunc("/echo", echoHandler)
-	http.HandleFunc("/bench", benchHandler)
-	http.HandleFunc("/bench/", benchHandler)
-	http.HandleFunc("/", whoamiHandler)
-	http.HandleFunc("/api", apiHandler)
-	http.HandleFunc("/health", healthHandler)
-
-	fmt.Println("Starting up on port " + port)
-
-	if len(cert) > 0 && len(key) > 0 {
-		log.Fatal(http.ListenAndServeTLS(":"+port, cert, key, nil))
-	}
-	log.Fatal(http.ListenAndServe(":"+port, nil))
-}
-
-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) {
-	fmt.Printf("Received b:")
-	for n := 0; n < len(s); n++ {
-		fmt.Printf("%d,", s[n])
-	}
-	fmt.Printf("\n")
-}
-
-func dataHandler(w http.ResponseWriter, r *http.Request) {
-	u, _ := url.Parse(r.URL.String())
-	queryParams := u.Query()
-
-	size, err := strconv.ParseInt(queryParams.Get("size"), 10, 64)
-	if err != nil {
-		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 := fillContent(size)
-
-	if attachment {
-		w.Header().Set("Content-Disposition", "Attachment")
-		http.ServeContent(w, r, "data.txt", time.Now(), content)
-		return
-	}
-
-	if _, err := io.Copy(w, content); err != nil {
-		http.Error(w, err.Error(), http.StatusInternalServerError)
-		return
-	}
-}
-
-func whoamiHandler(w http.ResponseWriter, req *http.Request) {
-	u, _ := url.Parse(req.URL.String())
-	wait := u.Query().Get("wait")
-	if len(wait) > 0 {
-		duration, err := time.ParseDuration(wait)
-		if err == nil {
-			time.Sleep(duration)
-		}
-	}
-
-	if name != "" {
-		_, _ = fmt.Fprintln(w, "Name:", name)
-	}
-
-	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)
-		}
-	}
-
-	_, _ = fmt.Fprintln(w, "RemoteAddr:", req.RemoteAddr)
-	if err := req.Write(w); err != nil {
-		http.Error(w, err.Error(), http.StatusInternalServerError)
-		return
-	}
-}
-
-func apiHandler(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"`
-		URL      string      `json:"url,omitempty"`
-		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,
-	}
-
-	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 {
-				data.IP = append(data.IP, ip.String())
-			}
-		}
-	}
-
-	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{http.StatusOK}
-	mutexHealthState   = &sync.RWMutex{}
-)
-
-func healthHandler(w http.ResponseWriter, req *http.Request) {
-	if req.Method == http.MethodPost {
-		var statusCode int
-
-		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 fillContent(length int64) io.ReadSeeker {
-	charset := "-ABCDEFGHIJKLMNOPQRSTUVWXYZ"
-	b := make([]byte, length)
-
-	for i := range b {
-		b[i] = charset[i%len(charset)]
-	}
-
-	if length > 0 {
-		b[0] = '|'
-		b[length-1] = '|'
-	}
-
-	return bytes.NewReader(b)
-}

go.mod

@@ -1,5 +1,39 @@
-module github.com/traefik/whoami
+module whoami
 
-go 1.13
+go 1.24.1
 
-require github.com/gorilla/websocket v1.4.2
+require github.com/gin-gonic/gin v1.11.0
+
+require (
+	github.com/bytedance/sonic v1.14.0 // indirect
+	github.com/bytedance/sonic/loader v0.3.0 // indirect
+	github.com/cloudwego/base64x v0.1.6 // indirect
+	github.com/gabriel-vasile/mimetype v1.4.8 // indirect
+	github.com/gin-contrib/sse v1.1.0 // indirect
+	github.com/go-playground/locales v0.14.1 // indirect
+	github.com/go-playground/universal-translator v0.18.1 // indirect
+	github.com/go-playground/validator/v10 v10.27.0 // indirect
+	github.com/goccy/go-json v0.10.2 // indirect
+	github.com/goccy/go-yaml v1.18.0 // indirect
+	github.com/json-iterator/go v1.1.12 // indirect
+	github.com/klauspost/cpuid/v2 v2.3.0 // indirect
+	github.com/leodido/go-urn v1.4.0 // indirect
+	github.com/mattn/go-isatty v0.0.20 // indirect
+	github.com/modern-go/concurrent v0.0.0-20180228061459-e0a39a4cb421 // indirect
+	github.com/modern-go/reflect2 v1.0.2 // indirect
+	github.com/pelletier/go-toml/v2 v2.2.4 // indirect
+	github.com/quic-go/qpack v0.5.1 // indirect
+	github.com/quic-go/quic-go v0.54.0 // indirect
+	github.com/twitchyliquid64/golang-asm v0.15.1 // indirect
+	github.com/ugorji/go/codec v1.3.0 // indirect
+	go.uber.org/mock v0.5.0 // indirect
+	golang.org/x/arch v0.20.0 // indirect
+	golang.org/x/crypto v0.40.0 // indirect
+	golang.org/x/mod v0.25.0 // indirect
+	golang.org/x/net v0.42.0 // indirect
+	golang.org/x/sync v0.16.0 // indirect
+	golang.org/x/sys v0.35.0 // indirect
+	golang.org/x/text v0.27.0 // indirect
+	golang.org/x/tools v0.34.0 // indirect
+	google.golang.org/protobuf v1.36.9 // indirect
+)

go.sum

@@ -1,2 +1,88 @@
-github.com/gorilla/websocket v1.4.2 h1:+/TMaTYc4QFitKJxsQ7Yye35DkWvkdLcvGKqM+x0Ufc=
+github.com/bytedance/sonic v1.14.0 h1:/OfKt8HFw0kh2rj8N0F6C/qPGRESq0BbaNZgcNXXzQQ=
-github.com/gorilla/websocket v1.4.2/go.mod h1:YR8l580nyteQvAITg2hZ9XVh4b55+EU/adAjf1fMHhE=
+github.com/bytedance/sonic v1.14.0/go.mod h1:WoEbx8WTcFJfzCe0hbmyTGrfjt8PzNEBdxlNUO24NhA=
+github.com/bytedance/sonic/loader v0.3.0 h1:dskwH8edlzNMctoruo8FPTJDF3vLtDT0sXZwvZJyqeA=
+github.com/bytedance/sonic/loader v0.3.0/go.mod h1:N8A3vUdtUebEY2/VQC0MyhYeKUFosQU6FxH2JmUe6VI=
+github.com/cloudwego/base64x v0.1.6 h1:t11wG9AECkCDk5fMSoxmufanudBtJ+/HemLstXDLI2M=
+github.com/cloudwego/base64x v0.1.6/go.mod h1:OFcloc187FXDaYHvrNIjxSe8ncn0OOM8gEHfghB2IPU=
+github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/gabriel-vasile/mimetype v1.4.8 h1:FfZ3gj38NjllZIeJAmMhr+qKL8Wu+nOoI3GqacKw1NM=
+github.com/gabriel-vasile/mimetype v1.4.8/go.mod h1:ByKUIKGjh1ODkGM1asKUbQZOLGrPjydw3hYPU2YU9t8=
+github.com/gin-contrib/sse v1.1.0 h1:n0w2GMuUpWDVp7qSpvze6fAu9iRxJY4Hmj6AmBOU05w=
+github.com/gin-contrib/sse v1.1.0/go.mod h1:hxRZ5gVpWMT7Z0B0gSNYqqsSCNIJMjzvm6fqCz9vjwM=
+github.com/gin-gonic/gin v1.11.0 h1:OW/6PLjyusp2PPXtyxKHU0RbX6I/l28FTdDlae5ueWk=
+github.com/gin-gonic/gin v1.11.0/go.mod h1:+iq/FyxlGzII0KHiBGjuNn4UNENUlKbGlNmc+W50Dls=
+github.com/go-playground/assert/v2 v2.2.0 h1:JvknZsQTYeFEAhQwI4qEt9cyV5ONwRHC+lYKSsYSR8s=
+github.com/go-playground/assert/v2 v2.2.0/go.mod h1:VDjEfimB/XKnb+ZQfWdccd7VUvScMdVu0Titje2rxJ4=
+github.com/go-playground/locales v0.14.1 h1:EWaQ/wswjilfKLTECiXz7Rh+3BjFhfDFKv/oXslEjJA=
+github.com/go-playground/locales v0.14.1/go.mod h1:hxrqLVvrK65+Rwrd5Fc6F2O76J/NuW9t0sjnWqG1slY=
+github.com/go-playground/universal-translator v0.18.1 h1:Bcnm0ZwsGyWbCzImXv+pAJnYK9S473LQFuzCbDbfSFY=
+github.com/go-playground/universal-translator v0.18.1/go.mod h1:xekY+UJKNuX9WP91TpwSH2VMlDf28Uj24BCp08ZFTUY=
+github.com/go-playground/validator/v10 v10.27.0 h1:w8+XrWVMhGkxOaaowyKH35gFydVHOvC0/uWoy2Fzwn4=
+github.com/go-playground/validator/v10 v10.27.0/go.mod h1:I5QpIEbmr8On7W0TktmJAumgzX4CA1XNl4ZmDuVHKKo=
+github.com/goccy/go-json v0.10.2 h1:CrxCmQqYDkv1z7lO7Wbh2HN93uovUHgrECaO5ZrCXAU=
+github.com/goccy/go-json v0.10.2/go.mod h1:6MelG93GURQebXPDq3khkgXZkazVtN9CRI+MGFi0w8I=
+github.com/goccy/go-yaml v1.18.0 h1:8W7wMFS12Pcas7KU+VVkaiCng+kG8QiFeFwzFb+rwuw=
+github.com/goccy/go-yaml v1.18.0/go.mod h1:XBurs7gK8ATbW4ZPGKgcbrY1Br56PdM69F7LkFRi1kA=
+github.com/google/go-cmp v0.7.0 h1:wk8382ETsv4JYUZwIsn6YpYiWiBsYLSJiTsyBybVuN8=
+github.com/google/go-cmp v0.7.0/go.mod h1:pXiqmnSA92OHEEa9HXL2W4E7lf9JzCmGVUdgjX3N/iU=
+github.com/google/gofuzz v1.0.0/go.mod h1:dBl0BpW6vV/+mYPU4Po3pmUjxk6FQPldtuIdl/M65Eg=
+github.com/json-iterator/go v1.1.12 h1:PV8peI4a0ysnczrg+LtxykD8LfKY9ML6u2jnxaEnrnM=
+github.com/json-iterator/go v1.1.12/go.mod h1:e30LSqwooZae/UwlEbR2852Gd8hjQvJoHmT4TnhNGBo=
+github.com/klauspost/cpuid/v2 v2.3.0 h1:S4CRMLnYUhGeDFDqkGriYKdfoFlDnMtqTiI/sFzhA9Y=
+github.com/klauspost/cpuid/v2 v2.3.0/go.mod h1:hqwkgyIinND0mEev00jJYCxPNVRVXFQeu1XKlok6oO0=
+github.com/leodido/go-urn v1.4.0 h1:WT9HwE9SGECu3lg4d/dIA+jxlljEa1/ffXKmRjqdmIQ=
+github.com/leodido/go-urn v1.4.0/go.mod h1:bvxc+MVxLKB4z00jd1z+Dvzr47oO32F/QSNjSBOlFxI=
+github.com/mattn/go-isatty v0.0.20 h1:xfD0iDuEKnDkl03q4limB+vH+GxLEtL/jb4xVJSWWEY=
+github.com/mattn/go-isatty v0.0.20/go.mod h1:W+V8PltTTMOvKvAeJH7IuucS94S2C6jfK/D7dTCTo3Y=
+github.com/modern-go/concurrent v0.0.0-20180228061459-e0a39a4cb421 h1:ZqeYNhU3OHLH3mGKHDcjJRFFRrJa6eAM5H+CtDdOsPc=
+github.com/modern-go/concurrent v0.0.0-20180228061459-e0a39a4cb421/go.mod h1:6dJC0mAP4ikYIbvyc7fijjWJddQyLn8Ig3JB5CqoB9Q=
+github.com/modern-go/reflect2 v1.0.2 h1:xBagoLtFs94CBntxluKeaWgTMpvLxC4ur3nMaC9Gz0M=
+github.com/modern-go/reflect2 v1.0.2/go.mod h1:yWuevngMOJpCy52FWWMvUC8ws7m/LJsjYzDa0/r8luk=
+github.com/pelletier/go-toml/v2 v2.2.4 h1:mye9XuhQ6gvn5h28+VilKrrPoQVanw5PMw/TB0t5Ec4=
+github.com/pelletier/go-toml/v2 v2.2.4/go.mod h1:2gIqNv+qfxSVS7cM2xJQKtLSTLUE9V8t9Stt+h56mCY=
+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/quic-go/qpack v0.5.1 h1:giqksBPnT/HDtZ6VhtFKgoLOWmlyo9Ei6u9PqzIMbhI=
+github.com/quic-go/qpack v0.5.1/go.mod h1:+PC4XFrEskIVkcLzpEkbLqq1uCoxPhQuvK5rH1ZgaEg=
+github.com/quic-go/quic-go v0.54.0 h1:6s1YB9QotYI6Ospeiguknbp2Znb/jZYjZLRXn9kMQBg=
+github.com/quic-go/quic-go v0.54.0/go.mod h1:e68ZEaCdyviluZmy44P6Iey98v/Wfz6HCjQEm+l8zTY=
+github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
+github.com/stretchr/objx v0.4.0/go.mod h1:YvHI0jy2hoMjB+UWwv71VJQ9isScKT/TqJzVSSt89Yw=
+github.com/stretchr/objx v0.5.0/go.mod h1:Yh+to48EsGEfYuaHDzXPcE3xhTkx73EhmCGUpEOglKo=
+github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
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+golang.org/x/arch v0.20.0/go.mod h1:bdwinDaKcfZUGpH09BB7ZmOfhalA8lQdzl62l8gGWsk=
+golang.org/x/crypto v0.40.0 h1:r4x+VvoG5Fm+eJcxMaY8CQM7Lb0l1lsmjGBQ6s8BfKM=
+golang.org/x/crypto v0.40.0/go.mod h1:Qr1vMER5WyS2dfPHAlsOj01wgLbsyWtFn/aY+5+ZdxY=
+golang.org/x/mod v0.25.0 h1:n7a+ZbQKQA/Ysbyb0/6IbB1H/X41mKgbhfv7AfG/44w=
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+golang.org/x/net v0.42.0 h1:jzkYrhi3YQWD6MLBJcsklgQsoAcw89EcZbJw8Z614hs=
+golang.org/x/net v0.42.0/go.mod h1:FF1RA5d3u7nAYA4z2TkclSCKh68eSXtiFwcWQpPXdt8=
+golang.org/x/sync v0.16.0 h1:ycBJEhp9p4vXvUZNszeOq0kGTPghopOL8q0fq3vstxw=
+golang.org/x/sync v0.16.0/go.mod h1:1dzgHSNfp02xaA81J2MS99Qcpr2w7fw1gpm99rleRqA=
+golang.org/x/sys v0.6.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.35.0 h1:vz1N37gP5bs89s7He8XuIYXpyY0+QlsKmzipCbUtyxI=
+golang.org/x/sys v0.35.0/go.mod h1:BJP2sWEmIv4KK5OTEluFJCKSidICx8ciO85XgH3Ak8k=
+golang.org/x/text v0.27.0 h1:4fGWRpyh641NLlecmyl4LOe6yDdfaYNrGb2zdfo4JV4=
+golang.org/x/text v0.27.0/go.mod h1:1D28KMCvyooCX9hBiosv5Tz/+YLxj0j7XhWjpSUF7CU=
+golang.org/x/tools v0.34.0 h1:qIpSLOxeCYGg9TrcJokLBG4KFA6d795g0xkBkiESGlo=
+golang.org/x/tools v0.34.0/go.mod h1:pAP9OwEaY1CAW3HOmg3hLZC5Z0CCmzjAF2UQMSqNARg=
+google.golang.org/protobuf v1.36.9 h1:w2gp2mA27hUeUzj9Ex9FBjsBm40zfaDtEWow293U7Iw=
+google.golang.org/protobuf v1.36.9/go.mod h1:fuxRtAxBytpl4zzqUh6/eyUujkJdNiuEkXntxiD/uRU=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
+gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
+gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

main.go

@@ -0,0 +1,62 @@
+package main
+
+import (
+	"fmt"
+	"log"
+	"net"
+	"os"
+	"strings"
+
+	"github.com/gin-gonic/gin"
+)
+
+func main() {
+	gin.SetMode(gin.ReleaseMode)
+	r := gin.Default()
+	r.Use(gin.Logger())
+	r.Use(gin.Recovery())
+	r.GET("/", func(c *gin.Context) {
+		log.Printf("user-agent=%s", c.Request.UserAgent())
+		hostname, _ := os.Hostname()
+		resultText := fmt.Sprintf("Hostname: %s\nIP: %s\nRemoteAddr: %s\nUser-Agent: %s\nX-Forwarded-For: %s\nX-Forwarded-Port: %s\nX-Forwarded-Server: %s\nX-Real-IP: %s\n",
+			hostname, strings.Join(GetIps(), ", "), c.Request.RemoteAddr, c.Request.UserAgent(), c.Request.Header.Get("X-Forwarded-For"),
+			c.Request.Header.Get("X-Forwarded-Port"), c.Request.Header.Get("X-Forwarded-Server"), c.Request.Header.Get("X-Real-IP"))
+		c.String(200, resultText)
+	})
+	port := ":80"
+	log.Printf("服务器启动在 http://localhost%s", port)
+	if err := r.Run(port); err != nil {
+		log.Fatal("服务器启动失败:", err)
+	}
+}
+
+func GetIps() []string {
+	ips := []string{}
+	interfaces, _ := net.Interfaces()
+	for _, iface := range interfaces {
+		if iface.Flags&net.FlagUp == 0 {
+			continue
+		}
+		addrs, err := iface.Addrs()
+		if err != nil {
+			continue
+		}
+		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 || ip.IsLoopback() {
+				continue
+			}
+			ipStr := ip.String()
+			if ip.To4() != nil {
+				ips = append(ips, ipStr)
+			}
+		}
+	}
+	return ips
+}

tmpl.Dockerfile

@@ -1,25 +0,0 @@
-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 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 --from=builder /go/whoami/whoami .
-
-ENTRYPOINT ["/whoami"]
-EXPOSE 80