fix(docker): following the FromAsCasing rule

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

.github/ISSUE_TEMPLATE/bug_report.yml

@@ -0,0 +1,72 @@
+name: Bug Report
+description: Create a report to help us improve.
+body:
+  - type: checkboxes
+    id: terms
+    attributes:
+      label: Welcome!
+      description: |
+        The issue tracker is for reporting bugs and feature requests only.
+
+        All new/updated issues are triaged regularly by the maintainers.
+        All issues closed by a bot are subsequently double-checked by the maintainers.
+
+        DO NOT FILE ISSUES FOR GENERAL SUPPORT QUESTIONS.
+
+      options:
+        - label: Yes, I've searched similar issues on [GitHub](https://github.com/traefik/whoami/issues) and didn't find any.
+          required: true
+
+  - type: textarea
+    attributes:
+      label: What did you do?
+      description: |
+        How to write a good bug report?
+
+        - Respect the issue template as much as possible.
+        - The title should be short and descriptive.
+        - Explain the conditions which led you to report this issue: the context.
+        - The context should lead to something, an idea or a problem that you’re facing.
+        - Remain clear and concise.
+        - Format your messages to help the reader focus on what matters and understand the structure of your message, use [Markdown syntax](https://help.github.com/articles/github-flavored-markdown)
+      placeholder: What did you do?
+    validations:
+      required: true
+
+  - type: textarea
+    attributes:
+      label: What were you expecting?
+      placeholder: What were you expecting?
+    validations:
+      required: true
+
+  - type: textarea
+    attributes:
+      label: What version are you using?
+      description: |
+        `latest` is not considered as a valid version.
+      placeholder: Paste your output here.
+    validations:
+      required: true
+
+  - type: textarea
+    attributes:
+      label: What is your environment & configuration?
+      description: arguments, toml, provider, platform, ...
+      placeholder: Add information here.
+      value: |
+        ```yaml
+        # (paste your configuration here)
+        ```
+
+        Add more configuration information here.
+    validations:
+      required: true
+
+  - type: textarea
+    attributes:
+      label: If applicable, please paste the log output in DEBUG level
+      description: "`--log.level=DEBUG` switch."
+      placeholder: Paste your output here.
+    validations:
+      required: false

.github/ISSUE_TEMPLATE/config.yml

@@ -0,0 +1,5 @@
+blank_issues_enabled: false
+contact_links:
+  - name: Traefik Community Support
+    url: https://community.traefik.io/
+    about: If you have a question, or are looking for advice, please post on our Discuss forum! The community loves to chime in to help. Happy Coding!

.github/ISSUE_TEMPLATE/feature_request.yml

@@ -0,0 +1,30 @@
+name: Feature Request
+description: Suggest an idea for this project.
+body:
+  - type: checkboxes
+    id: terms
+    attributes:
+      label: Welcome!
+      description: |
+        The issue tracker is for reporting bugs and feature requests only.
+
+        DO NOT FILE ISSUES FOR GENERAL SUPPORT QUESTIONS.
+      options:
+        - label: Yes, I've searched similar issues on [GitHub](https://github.com/traefik/whoami/issues) and didn't find any.
+          required: true
+
+  - type: textarea
+    attributes:
+      label: What did you expect to see?
+      description: |
+        How to write a good issue?
+
+        - Respect the issue template as much as possible.
+        - The title should be short and descriptive.
+        - Explain the conditions which led you to report this issue: the context.
+        - The context should lead to something, an idea or a problem that you’re facing.
+        - Remain clear and concise.
+        - Format your messages to help the reader focus on what matters and understand the structure of your message, use [Markdown syntax](https://help.github.com/articles/github-flavored-markdown)
+      placeholder: What did you expect to see?
+    validations:
+      required: true

.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: v2.1.2
+      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

.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

.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 }}

.gitignore

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

.golangci.yml

@@ -0,0 +1,84 @@
+version: "2"
+linters:
+  default: all
+  disable:
+    - cyclop
+    - dupl
+    - err113
+    - exhaustive
+    - exhaustruct
+    - forbidigo
+    - gochecknoglobals
+    - gochecknoinits
+    - gosec
+    - lll
+    - mnd
+    - nilnil
+    - nlreturn
+    - paralleltest
+    - prealloc
+    - rowserrcheck
+    - sqlclosecheck
+    - testpackage
+    - tparallel
+    - varnamelen
+    - wrapcheck
+    - wsl
+  settings:
+    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
+    forbidigo:
+      forbid:
+        - pattern: ^print(ln)?$
+        - pattern: ^panic$
+        - pattern: ^spew\.Print(f|ln)?$
+        - pattern: ^spew\.Dump$
+    funlen:
+      lines: -1
+      statements: 40
+    goconst:
+      min-len: 3
+      min-occurrences: 3
+    gocritic:
+      disabled-checks:
+        - sloppyReassign
+        - rangeValCopy
+        - octalLiteral
+        - paramTypeCombine
+      enabled-tags:
+        - diagnostic
+        - style
+        - performance
+      settings:
+        hugeParam:
+          sizeThreshold: 100
+    gocyclo:
+      min-complexity: 16
+    godox:
+      keywords:
+        - FIXME
+    govet:
+      disable:
+        - fieldalignment
+      enable-all: true
+    misspell:
+      locale: US
+  exclusions: 
+    presets:
+      - comments
+issues:
+  max-issues-per-linter: 0
+  max-same-issues: 0
+formatters:
+  enable:
+    - gci
+    - gofumpt
+  settings:
+    gofumpt:
+      extra-rules: true

.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'

Dockerfile

@@ -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

LICENSE

@@ -0,0 +1,202 @@
+                                 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
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+
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+      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 [2015-2019] [Containous]
+   Copyright [2020-2022] [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

@@ -0,0 +1,20 @@
+.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) .
+
+protoc:
+	 protoc --proto_path . ./grpc.proto --go-grpc_out=./ --go_out=./

README.md

@@ -1,19 +1,150 @@
-# 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)
 
-```sh
+Tiny Go webserver that prints OS information and HTTP request to output.
-$ docker run -d -P --name iamfoo emilevauge/whoami
+
-$ docker inspect --format '{{ .NetworkSettings.Ports }}'  iamfoo
+## Usage
-map[80/tcp:[{0.0.0.0 32769}]]
+
-$ curl "http://0.0.0.0:32769"
+### Paths
-Hostname :  6e0030e67d6a
+
+#### `/[?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 8080:80 --name iamfoo traefik/whoami
+
+$ curl http://localhost:8080
+Hostname: 9c9c93da54b5
 IP: 127.0.0.1
 IP: ::1
-IP :  172.17.0.27
+IP: 172.17.0.2
-IP :  fe80::42:acff:fe11:1b
+RemoteAddr: 172.17.0.1:41040
 GET / HTTP/1.1
-Host: 0.0.0.0:32769
+Host: localhost:8080
-User-Agent: curl/7.35.0
+User-Agent: curl/8.5.0
 Accept: */*
 ```
+
+```console
+# updates health check status
+$ curl -X POST -d '500' http://localhost:8080/health
+
+# calls the health check
+$ curl -v http://localhost:8080/health
+* Host localhost:8080 was resolved.
+* IPv6: ::1
+* IPv4: 127.0.0.1
+*   Trying [::1]:8080...
+* Connected to localhost (::1) port 8080
+> GET /health HTTP/1.1
+> Host: localhost:8080
+> User-Agent: curl/8.5.0
+> Accept: */*
+> 
+< HTTP/1.1 500 Internal Server Error
+< Date: Fri, 18 Apr 2025 13:36:02 GMT
+< Content-Length: 0
+```
+
+```console
+$ openssl req -newkey rsa:4096 \
+    -x509 \
+    -sha256 \
+    -days 3650 \
+    -nodes \
+    -out ./certs/example.crt \
+    -keyout ./certs/example.key
+
+$ docker run -d -p 8080:80 -v ./certs:/certs --name iamfoo traefik/whoami --cert /certs/example.crt --key /certs/example.key
+
+$ curl https://localhost:8080 -k --cert certs/example.crt  --key certs/example.key
+Hostname: 25bc0df47b95
+IP: 127.0.0.1
+IP: ::1
+IP: 172.17.0.2
+RemoteAddr: 172.17.0.1:50278
+Certificate[0] Subject: CN=traefik.io,O=TraefikLabs,L=Lyon,ST=France,C=FR
+GET / HTTP/1.1
+Host: localhost:8080
+User-Agent: curl/8.5.0
+Accept: */*
+```
+
+```console
+$ docker run -d -p 8080:80 --name iamfoo traefik/whoami
+
+$ grpcurl -plaintext -proto grpc.proto localhost:8080 whoami.Whoami/Whoami
+{
+  "hostname": "5a45e21984b4",
+  "iface": [
+    "127.0.0.1",
+    "::1",
+    "172.17.0.2"
+  ]
+}
+
+$ grpcurl -plaintext -proto grpc.proto localhost:8080 whoami.Whoami/Bench
+{
+  "data": 1
+}
+```
+
+```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

@@ -1,28 +1,341 @@
 package main
 
 import (
+	"context"
+	"crypto/tls"
+	"crypto/x509"
+	"encoding/json"
+	"flag"
 	"fmt"
-	"github.com/gorilla/mux"
+	"io"
 	"log"
 	"net"
 	"net/http"
 	"os"
+	"strconv"
+	"strings"
+	"sync"
+	"time"
+
+	"github.com/gorilla/websocket"
+	grpcWhoami "github.com/traefik/whoami/grpc"
+	"golang.org/x/net/http2"
+	"golang.org/x/net/http2/h2c"
+	"google.golang.org/grpc"
 )
 
-func main() {
+// Units.
+const (
+	_        = iota
+	KB int64 = 1 << (10 * iota)
+	MB
+	GB
+	TB
+)
 
-	r := mux.NewRouter()
+var upgrader = websocket.Upgrader{
-	r.HandleFunc("/", whoamI)
+	ReadBufferSize:  1024,
-	http.Handle("/", r)
+	WriteBufferSize: 1024,
-	fmt.Println("Starting up on 80")
+	CheckOrigin: func(_ *http.Request) bool {
-	log.Fatal(http.ListenAndServe(":80", nil))
+		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() {
+	flag.Parse()
+
+	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))
+
+	serverGRPC := grpc.NewServer()
+	grpcWhoami.RegisterWhoamiServer(serverGRPC, whoamiServer{})
+	mux.Handle("/whoami.Whoami/", serverGRPC)
+
+	h := handle(mux.ServeHTTP, verbose)
+
+	if cert == "" || key == "" {
+		log.Printf("Starting up on port %s", port)
+
+		log.Fatal(http.ListenAndServe(":"+port, h2c.NewHandler(h, &http2.Server{})))
+	}
+
+	server := &http.Server{
+		Addr:      ":" + port,
+		TLSConfig: &tls.Config{ClientAuth: tls.RequestClientCert},
+		Handler:   h,
+	}
+
+	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) {
+	fmt.Printf("Received b:")
+	for n := range s {
+		fmt.Printf("%d,", s[n])
+	}
+	fmt.Printf("\n")
+}
+
+func dataHandler(w http.ResponseWriter, r *http.Request) {
+	queryParams := r.URL.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 := &contentReader{size: 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, r *http.Request) {
+	queryParams := r.URL.Query()
+
+	wait := queryParams.Get("wait")
+	if wait != "" {
+		duration, err := time.ParseDuration(wait)
+		if err == nil {
+			time.Sleep(duration)
+		}
+	}
+
+	if name != "" {
+		_, _ = fmt.Fprintln(w, "Name:", name)
 	}
 
-func whoamI(w http.ResponseWriter, req *http.Request) {
 	hostname, _ := os.Hostname()
-	fmt.Fprintln(w, "Hostname : ", hostname)
+	_, _ = fmt.Fprintln(w, "Hostname:", hostname)
+
+	for _, ip := range getIPs() {
+		_, _ = fmt.Fprintln(w, "IP:", ip)
+	}
+
+	_, _ = fmt.Fprintln(w, "RemoteAddr:", r.RemoteAddr)
+
+	if r.TLS != nil {
+		for i, cert := range r.TLS.PeerCertificates {
+			_, _ = fmt.Fprintf(w, "Certificate[%d] Subject: %v\n", i, cert.Subject)
+		}
+	}
+
+	if err := r.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) {
+	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{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 getEnv(key, fallback string) string {
+	value := os.Getenv(key)
+	if value == "" {
+		return fallback
+	}
+	return value
+}
+
+func getIPs() []string {
+	var ips []string
+
 	ifaces, _ := net.Interfaces()
-	// handle err
 	for _, i := range ifaces {
 		addrs, _ := i.Addrs()
 		// handle err
@@ -34,8 +347,46 @@ func whoamI(w http.ResponseWriter, req *http.Request) {
 			case *net.IPAddr:
 				ip = v.IP
 			}
-			fmt.Fprintln(w, "IP : ", ip)
+			if ip != nil {
+				ips = append(ips, ip.String())
 			}
 		}
-	req.Write(w)
+	}
+
+	return ips
+}
+
+type whoamiServer struct {
+	grpcWhoami.UnimplementedWhoamiServer
+}
+
+func (g whoamiServer) Bench(_ context.Context, _ *grpcWhoami.BenchRequest) (*grpcWhoami.BenchReply, error) {
+	return &grpcWhoami.BenchReply{Data: 1}, nil
+}
+
+func (g whoamiServer) Whoami(_ context.Context, _ *grpcWhoami.WhoamiRequest) (*grpcWhoami.WhoamiReply, error) {
+	reply := &grpcWhoami.WhoamiReply{}
+	if name != "" {
+		reply.Name = name
+	}
+
+	reply.Hostname, _ = os.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
+			}
+			reply.Iface = append(reply.Iface, ip.String())
+		}
+	}
+
+	return reply, nil
 }

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 .

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

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
+}

content_test.go

@@ -0,0 +1,80 @@
+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 {
+		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 {
+		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

@@ -0,0 +1,16 @@
+module github.com/traefik/whoami
+
+go 1.24
+
+require (
+	github.com/gorilla/websocket v1.5.3
+	golang.org/x/net v0.34.0
+	google.golang.org/grpc v1.71.1
+	google.golang.org/protobuf v1.36.6
+)
+
+require (
+	golang.org/x/sys v0.29.0 // indirect
+	golang.org/x/text v0.21.0 // indirect
+	google.golang.org/genproto/googleapis/rpc v0.0.0-20250115164207-1a7da9e5054f // indirect
+)

go.sum

@@ -0,0 +1,36 @@
+github.com/go-logr/logr v1.4.2 h1:6pFjapn8bFcIbiKo3XT4j/BhANplGihG6tvd+8rYgrY=
+github.com/go-logr/logr v1.4.2/go.mod h1:9T104GzyrTigFIr8wt5mBrctHMim0Nb2HLGrmQ40KvY=
+github.com/go-logr/stdr v1.2.2 h1:hSWxHoqTgW2S2qGc0LTAI563KZ5YKYRhT3MFKZMbjag=
+github.com/go-logr/stdr v1.2.2/go.mod h1:mMo/vtBO5dYbehREoey6XUKy/eSumjCCveDpRre4VKE=
+github.com/golang/protobuf v1.5.4 h1:i7eJL8qZTpSEXOPTxNKhASYpMn+8e5Q6AdndVa1dWek=
+github.com/golang/protobuf v1.5.4/go.mod h1:lnTiLA8Wa4RWRcIUkrtSVa5nRhsEGBg48fD6rSs7xps=
+github.com/google/go-cmp v0.6.0 h1:ofyhxvXcZhMsU5ulbFiLKl/XBFqE1GSq7atu8tAmTRI=
+github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
+github.com/google/uuid v1.6.0 h1:NIvaJDMOsjHA8n1jAhLSgzrAzy1Hgr+hNrb57e+94F0=
+github.com/google/uuid v1.6.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
+github.com/gorilla/websocket v1.5.3 h1:saDtZ6Pbx/0u+bgYQ3q96pZgCzfhKXGPqt7kZ72aNNg=
+github.com/gorilla/websocket v1.5.3/go.mod h1:YR8l580nyteQvAITg2hZ9XVh4b55+EU/adAjf1fMHhE=
+go.opentelemetry.io/auto/sdk v1.1.0 h1:cH53jehLUN6UFLY71z+NDOiNJqDdPRaXzTel0sJySYA=
+go.opentelemetry.io/auto/sdk v1.1.0/go.mod h1:3wSPjt5PWp2RhlCcmmOial7AvC4DQqZb7a7wCow3W8A=
+go.opentelemetry.io/otel v1.34.0 h1:zRLXxLCgL1WyKsPVrgbSdMN4c0FMkDAskSTQP+0hdUY=
+go.opentelemetry.io/otel v1.34.0/go.mod h1:OWFPOQ+h4G8xpyjgqo4SxJYdDQ/qmRH+wivy7zzx9oI=
+go.opentelemetry.io/otel/metric v1.34.0 h1:+eTR3U0MyfWjRDhmFMxe2SsW64QrZ84AOhvqS7Y+PoQ=
+go.opentelemetry.io/otel/metric v1.34.0/go.mod h1:CEDrp0fy2D0MvkXE+dPV7cMi8tWZwX3dmaIhwPOaqHE=
+go.opentelemetry.io/otel/sdk v1.34.0 h1:95zS4k/2GOy069d321O8jWgYsW3MzVV+KuSPKp7Wr1A=
+go.opentelemetry.io/otel/sdk v1.34.0/go.mod h1:0e/pNiaMAqaykJGKbi+tSjWfNNHMTxoC9qANsCzbyxU=
+go.opentelemetry.io/otel/sdk/metric v1.34.0 h1:5CeK9ujjbFVL5c1PhLuStg1wxA7vQv7ce1EK0Gyvahk=
+go.opentelemetry.io/otel/sdk/metric v1.34.0/go.mod h1:jQ/r8Ze28zRKoNRdkjCZxfs6YvBTG1+YIqyFVFYec5w=
+go.opentelemetry.io/otel/trace v1.34.0 h1:+ouXS2V8Rd4hp4580a8q23bg0azF2nI8cqLYnC8mh/k=
+go.opentelemetry.io/otel/trace v1.34.0/go.mod h1:Svm7lSjQD7kG7KJ/MUHPVXSDGz2OX4h0M2jHBhmSfRE=
+golang.org/x/net v0.34.0 h1:Mb7Mrk043xzHgnRM88suvJFwzVrRfHEHJEl5/71CKw0=
+golang.org/x/net v0.34.0/go.mod h1:di0qlW3YNM5oh6GqDGQr92MyTozJPmybPK4Ev/Gm31k=
+golang.org/x/sys v0.29.0 h1:TPYlXGxvx1MGTn2GiZDhnjPA9wZzZeGKHHmKhHYvgaU=
+golang.org/x/sys v0.29.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
+golang.org/x/text v0.21.0 h1:zyQAAkrwaneQ066sspRyJaG9VNi/YJ1NfzcGB3hZ/qo=
+golang.org/x/text v0.21.0/go.mod h1:4IBbMaMmOPCJ8SecivzSH54+73PCFmPWxNTLm+vZkEQ=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20250115164207-1a7da9e5054f h1:OxYkA3wjPsZyBylwymxSHa7ViiW1Sml4ToBrncvFehI=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20250115164207-1a7da9e5054f/go.mod h1:+2Yz8+CLJbIfL9z73EW45avw8Lmge3xVElCP9zEKi50=
+google.golang.org/grpc v1.71.1 h1:ffsFWr7ygTUscGPI0KKK6TLrGz0476KUvvsbqWK0rPI=
+google.golang.org/grpc v1.71.1/go.mod h1:H0GRtasmQOh9LkFoCPDu3ZrwUtD1YGE+b2vYBYd/8Ec=
+google.golang.org/protobuf v1.36.6 h1:z1NpPI8ku2WgiWnf+t9wTPsn6eP1L7ksHUlkfLvd9xY=
+google.golang.org/protobuf v1.36.6/go.mod h1:jduwjTPXsFjZGTmRluh+L6NjiWu7pchiJ2/5YcXBHnY=

grpc.proto

@@ -0,0 +1,26 @@
+syntax = "proto3";
+
+package whoami;
+
+option go_package = "./grpc";
+
+service Whoami {
+  rpc Whoami (WhoamiRequest) returns (WhoamiReply) {}
+  rpc Bench(BenchRequest) returns (BenchReply) {}
+}
+
+message WhoamiRequest {}
+
+message WhoamiReply {
+  string name = 1;
+  string hostname = 2;
+  repeated string iface = 3;
+}
+
+// The empty request message
+message BenchRequest {}
+
+// The response message containing simple data
+message BenchReply {
+  int32 data = 1;
+}

grpc/grpc.pb.go

@@ -0,0 +1,274 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// versions:
+// 	protoc-gen-go v1.36.6
+// 	protoc        v3.21.12
+// source: grpc.proto
+
+package grpc
+
+import (
+	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
+	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
+	reflect "reflect"
+	sync "sync"
+	unsafe "unsafe"
+)
+
+const (
+	// Verify that this generated code is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(20 - protoimpl.MinVersion)
+	// Verify that runtime/protoimpl is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
+)
+
+type WhoamiRequest struct {
+	state         protoimpl.MessageState `protogen:"open.v1"`
+	unknownFields protoimpl.UnknownFields
+	sizeCache     protoimpl.SizeCache
+}
+
+func (x *WhoamiRequest) Reset() {
+	*x = WhoamiRequest{}
+	mi := &file_grpc_proto_msgTypes[0]
+	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+	ms.StoreMessageInfo(mi)
+}
+
+func (x *WhoamiRequest) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*WhoamiRequest) ProtoMessage() {}
+
+func (x *WhoamiRequest) ProtoReflect() protoreflect.Message {
+	mi := &file_grpc_proto_msgTypes[0]
+	if x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use WhoamiRequest.ProtoReflect.Descriptor instead.
+func (*WhoamiRequest) Descriptor() ([]byte, []int) {
+	return file_grpc_proto_rawDescGZIP(), []int{0}
+}
+
+type WhoamiReply struct {
+	state         protoimpl.MessageState `protogen:"open.v1"`
+	Name          string                 `protobuf:"bytes,1,opt,name=name,proto3" json:"name,omitempty"`
+	Hostname      string                 `protobuf:"bytes,2,opt,name=hostname,proto3" json:"hostname,omitempty"`
+	Iface         []string               `protobuf:"bytes,3,rep,name=iface,proto3" json:"iface,omitempty"`
+	unknownFields protoimpl.UnknownFields
+	sizeCache     protoimpl.SizeCache
+}
+
+func (x *WhoamiReply) Reset() {
+	*x = WhoamiReply{}
+	mi := &file_grpc_proto_msgTypes[1]
+	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+	ms.StoreMessageInfo(mi)
+}
+
+func (x *WhoamiReply) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*WhoamiReply) ProtoMessage() {}
+
+func (x *WhoamiReply) ProtoReflect() protoreflect.Message {
+	mi := &file_grpc_proto_msgTypes[1]
+	if x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use WhoamiReply.ProtoReflect.Descriptor instead.
+func (*WhoamiReply) Descriptor() ([]byte, []int) {
+	return file_grpc_proto_rawDescGZIP(), []int{1}
+}
+
+func (x *WhoamiReply) GetName() string {
+	if x != nil {
+		return x.Name
+	}
+	return ""
+}
+
+func (x *WhoamiReply) GetHostname() string {
+	if x != nil {
+		return x.Hostname
+	}
+	return ""
+}
+
+func (x *WhoamiReply) GetIface() []string {
+	if x != nil {
+		return x.Iface
+	}
+	return nil
+}
+
+// The empty request message
+type BenchRequest struct {
+	state         protoimpl.MessageState `protogen:"open.v1"`
+	unknownFields protoimpl.UnknownFields
+	sizeCache     protoimpl.SizeCache
+}
+
+func (x *BenchRequest) Reset() {
+	*x = BenchRequest{}
+	mi := &file_grpc_proto_msgTypes[2]
+	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+	ms.StoreMessageInfo(mi)
+}
+
+func (x *BenchRequest) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*BenchRequest) ProtoMessage() {}
+
+func (x *BenchRequest) ProtoReflect() protoreflect.Message {
+	mi := &file_grpc_proto_msgTypes[2]
+	if x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use BenchRequest.ProtoReflect.Descriptor instead.
+func (*BenchRequest) Descriptor() ([]byte, []int) {
+	return file_grpc_proto_rawDescGZIP(), []int{2}
+}
+
+// The response message containing simple data
+type BenchReply struct {
+	state         protoimpl.MessageState `protogen:"open.v1"`
+	Data          int32                  `protobuf:"varint,1,opt,name=data,proto3" json:"data,omitempty"`
+	unknownFields protoimpl.UnknownFields
+	sizeCache     protoimpl.SizeCache
+}
+
+func (x *BenchReply) Reset() {
+	*x = BenchReply{}
+	mi := &file_grpc_proto_msgTypes[3]
+	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+	ms.StoreMessageInfo(mi)
+}
+
+func (x *BenchReply) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*BenchReply) ProtoMessage() {}
+
+func (x *BenchReply) ProtoReflect() protoreflect.Message {
+	mi := &file_grpc_proto_msgTypes[3]
+	if x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use BenchReply.ProtoReflect.Descriptor instead.
+func (*BenchReply) Descriptor() ([]byte, []int) {
+	return file_grpc_proto_rawDescGZIP(), []int{3}
+}
+
+func (x *BenchReply) GetData() int32 {
+	if x != nil {
+		return x.Data
+	}
+	return 0
+}
+
+var File_grpc_proto protoreflect.FileDescriptor
+
+const file_grpc_proto_rawDesc = "" +
+	"\n" +
+	"\n" +
+	"grpc.proto\x12\x06whoami\"\x0f\n" +
+	"\rWhoamiRequest\"S\n" +
+	"\vWhoamiReply\x12\x12\n" +
+	"\x04name\x18\x01 \x01(\tR\x04name\x12\x1a\n" +
+	"\bhostname\x18\x02 \x01(\tR\bhostname\x12\x14\n" +
+	"\x05iface\x18\x03 \x03(\tR\x05iface\"\x0e\n" +
+	"\fBenchRequest\" \n" +
+	"\n" +
+	"BenchReply\x12\x12\n" +
+	"\x04data\x18\x01 \x01(\x05R\x04data2u\n" +
+	"\x06Whoami\x126\n" +
+	"\x06Whoami\x12\x15.whoami.WhoamiRequest\x1a\x13.whoami.WhoamiReply\"\x00\x123\n" +
+	"\x05Bench\x12\x14.whoami.BenchRequest\x1a\x12.whoami.BenchReply\"\x00B\bZ\x06./grpcb\x06proto3"
+
+var (
+	file_grpc_proto_rawDescOnce sync.Once
+	file_grpc_proto_rawDescData []byte
+)
+
+func file_grpc_proto_rawDescGZIP() []byte {
+	file_grpc_proto_rawDescOnce.Do(func() {
+		file_grpc_proto_rawDescData = protoimpl.X.CompressGZIP(unsafe.Slice(unsafe.StringData(file_grpc_proto_rawDesc), len(file_grpc_proto_rawDesc)))
+	})
+	return file_grpc_proto_rawDescData
+}
+
+var file_grpc_proto_msgTypes = make([]protoimpl.MessageInfo, 4)
+var file_grpc_proto_goTypes = []any{
+	(*WhoamiRequest)(nil), // 0: whoami.WhoamiRequest
+	(*WhoamiReply)(nil),   // 1: whoami.WhoamiReply
+	(*BenchRequest)(nil),  // 2: whoami.BenchRequest
+	(*BenchReply)(nil),    // 3: whoami.BenchReply
+}
+var file_grpc_proto_depIdxs = []int32{
+	0, // 0: whoami.Whoami.Whoami:input_type -> whoami.WhoamiRequest
+	2, // 1: whoami.Whoami.Bench:input_type -> whoami.BenchRequest
+	1, // 2: whoami.Whoami.Whoami:output_type -> whoami.WhoamiReply
+	3, // 3: whoami.Whoami.Bench:output_type -> whoami.BenchReply
+	2, // [2:4] is the sub-list for method output_type
+	0, // [0:2] is the sub-list for method input_type
+	0, // [0:0] is the sub-list for extension type_name
+	0, // [0:0] is the sub-list for extension extendee
+	0, // [0:0] is the sub-list for field type_name
+}
+
+func init() { file_grpc_proto_init() }
+func file_grpc_proto_init() {
+	if File_grpc_proto != nil {
+		return
+	}
+	type x struct{}
+	out := protoimpl.TypeBuilder{
+		File: protoimpl.DescBuilder{
+			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
+			RawDescriptor: unsafe.Slice(unsafe.StringData(file_grpc_proto_rawDesc), len(file_grpc_proto_rawDesc)),
+			NumEnums:      0,
+			NumMessages:   4,
+			NumExtensions: 0,
+			NumServices:   1,
+		},
+		GoTypes:           file_grpc_proto_goTypes,
+		DependencyIndexes: file_grpc_proto_depIdxs,
+		MessageInfos:      file_grpc_proto_msgTypes,
+	}.Build()
+	File_grpc_proto = out.File
+	file_grpc_proto_goTypes = nil
+	file_grpc_proto_depIdxs = nil
+}

grpc/grpc_grpc.pb.go

@@ -0,0 +1,159 @@
+// Code generated by protoc-gen-go-grpc. DO NOT EDIT.
+// versions:
+// - protoc-gen-go-grpc v1.5.1
+// - protoc             v3.21.12
+// source: grpc.proto
+
+package grpc
+
+import (
+	context "context"
+	grpc "google.golang.org/grpc"
+	codes "google.golang.org/grpc/codes"
+	status "google.golang.org/grpc/status"
+)
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the grpc package it is being compiled against.
+// Requires gRPC-Go v1.64.0 or later.
+const _ = grpc.SupportPackageIsVersion9
+
+const (
+	Whoami_Whoami_FullMethodName = "/whoami.Whoami/Whoami"
+	Whoami_Bench_FullMethodName  = "/whoami.Whoami/Bench"
+)
+
+// WhoamiClient is the client API for Whoami service.
+//
+// For semantics around ctx use and closing/ending streaming RPCs, please refer to https://pkg.go.dev/google.golang.org/grpc/?tab=doc#ClientConn.NewStream.
+type WhoamiClient interface {
+	Whoami(ctx context.Context, in *WhoamiRequest, opts ...grpc.CallOption) (*WhoamiReply, error)
+	Bench(ctx context.Context, in *BenchRequest, opts ...grpc.CallOption) (*BenchReply, error)
+}
+
+type whoamiClient struct {
+	cc grpc.ClientConnInterface
+}
+
+func NewWhoamiClient(cc grpc.ClientConnInterface) WhoamiClient {
+	return &whoamiClient{cc}
+}
+
+func (c *whoamiClient) Whoami(ctx context.Context, in *WhoamiRequest, opts ...grpc.CallOption) (*WhoamiReply, error) {
+	cOpts := append([]grpc.CallOption{grpc.StaticMethod()}, opts...)
+	out := new(WhoamiReply)
+	err := c.cc.Invoke(ctx, Whoami_Whoami_FullMethodName, in, out, cOpts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+func (c *whoamiClient) Bench(ctx context.Context, in *BenchRequest, opts ...grpc.CallOption) (*BenchReply, error) {
+	cOpts := append([]grpc.CallOption{grpc.StaticMethod()}, opts...)
+	out := new(BenchReply)
+	err := c.cc.Invoke(ctx, Whoami_Bench_FullMethodName, in, out, cOpts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+// WhoamiServer is the server API for Whoami service.
+// All implementations must embed UnimplementedWhoamiServer
+// for forward compatibility.
+type WhoamiServer interface {
+	Whoami(context.Context, *WhoamiRequest) (*WhoamiReply, error)
+	Bench(context.Context, *BenchRequest) (*BenchReply, error)
+	mustEmbedUnimplementedWhoamiServer()
+}
+
+// UnimplementedWhoamiServer must be embedded to have
+// forward compatible implementations.
+//
+// NOTE: this should be embedded by value instead of pointer to avoid a nil
+// pointer dereference when methods are called.
+type UnimplementedWhoamiServer struct{}
+
+func (UnimplementedWhoamiServer) Whoami(context.Context, *WhoamiRequest) (*WhoamiReply, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method Whoami not implemented")
+}
+func (UnimplementedWhoamiServer) Bench(context.Context, *BenchRequest) (*BenchReply, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method Bench not implemented")
+}
+func (UnimplementedWhoamiServer) mustEmbedUnimplementedWhoamiServer() {}
+func (UnimplementedWhoamiServer) testEmbeddedByValue()                {}
+
+// UnsafeWhoamiServer may be embedded to opt out of forward compatibility for this service.
+// Use of this interface is not recommended, as added methods to WhoamiServer will
+// result in compilation errors.
+type UnsafeWhoamiServer interface {
+	mustEmbedUnimplementedWhoamiServer()
+}
+
+func RegisterWhoamiServer(s grpc.ServiceRegistrar, srv WhoamiServer) {
+	// If the following call pancis, it indicates UnimplementedWhoamiServer was
+	// embedded by pointer and is nil.  This will cause panics if an
+	// unimplemented method is ever invoked, so we test this at initialization
+	// time to prevent it from happening at runtime later due to I/O.
+	if t, ok := srv.(interface{ testEmbeddedByValue() }); ok {
+		t.testEmbeddedByValue()
+	}
+	s.RegisterService(&Whoami_ServiceDesc, srv)
+}
+
+func _Whoami_Whoami_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(WhoamiRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(WhoamiServer).Whoami(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: Whoami_Whoami_FullMethodName,
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(WhoamiServer).Whoami(ctx, req.(*WhoamiRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+func _Whoami_Bench_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(BenchRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(WhoamiServer).Bench(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: Whoami_Bench_FullMethodName,
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(WhoamiServer).Bench(ctx, req.(*BenchRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+// Whoami_ServiceDesc is the grpc.ServiceDesc for Whoami service.
+// It's only intended for direct use with grpc.RegisterService,
+// and not to be introspected or modified (even as a copy)
+var Whoami_ServiceDesc = grpc.ServiceDesc{
+	ServiceName: "whoami.Whoami",
+	HandlerType: (*WhoamiServer)(nil),
+	Methods: []grpc.MethodDesc{
+		{
+			MethodName: "Whoami",
+			Handler:    _Whoami_Whoami_Handler,
+		},
+		{
+			MethodName: "Bench",
+			Handler:    _Whoami_Bench_Handler,
+		},
+	},
+	Streams:  []grpc.StreamDesc{},
+	Metadata: "grpc.proto",
+}