Initial commit

.gitignore

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+### Go ###
+# Binaries for programs and plugins
+*.exe
+*.exe~
+*.dll
+*.so
+*.dylib
+*.test
+
+# Output of the go coverage tool, specifically when used with LiteIDE
+*.out
+
+/vendor/
+/Godeps/
+qr
+
+.vscode
+

Dockerfile

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+FROM golang:alpine AS builder
+RUN apk update && apk add --no-cache git && adduser -D -g '' gopher && apk add -U --no-cache ca-certificates
+WORKDIR /app/
+ADD go.mod go.sum ./
+RUN go mod download
+ADD . .
+RUN GOOS=linux GOARCH=amd64 CGO_ENABLED=0 go build -ldflags="-w -s" -o qr main.go
+
+FROM scratch
+WORKDIR /app/
+COPY --from=builder /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/
+COPY --from=builder /etc/passwd /etc/passwd
+COPY --from=builder /app/qr /app/qr
+USER gopher
+ENTRYPOINT ["/app/qr"]
+

LICENSE

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+MIT License
+
+Copyright (c) 2020 Marcus Noble
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+

Makefile

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+.DEFAULT_GOAL := default
+
+IMAGE ?= docker.cluster.fun/averagemarcus/qr:latest
+
+.PHONY: test # Run all tests, linting and format checks
+test: lint check-format run-tests
+
+.PHONY: lint # Perform lint checks against code
+lint:
+	@go vet && golint -set_exit_status ./...
+
+.PHONY: check-format # Checks code formatting and returns a non-zero exit code if formatting errors found
+check-format:
+	@gofmt -e -l .
+
+.PHONY: format # Performs automatic format fixes on all code
+format:
+	@gofmt -s -w .
+
+.PHONY: run-tests # Runs all tests
+run-tests:
+	@go test
+
+.PHONY: fetch-deps # Fetch all project dependencies
+fetch-deps:
+	@go mod tidy
+
+.PHONY: build # Build the project
+build: lint check-format fetch-deps
+	@go build -o qr main.go
+
+.PHONY: docker-build # Build the docker image
+docker-build:
+	@docker build -t $(IMAGE) .
+
+.PHONY: docker-publish # Push the docker image to the remote registry
+docker-publish:
+	@docker push $(IMAGE)
+
+.PHONY: run # Run the application
+run:
+	@go run main.go
+
+.PHONY: ci # Perform CI specific tasks to perform on a pull request
+ci:
+	@echo "⚠️ 'ci' unimplemented"
+
+.PHONY: release # Release the latest version of the application
+release:
+	@echo "⚠️ 'release' unimplemented"
+
+.PHONY: help # Show this list of commands
+help:
+	@echo "${REPO_NAME}"
+	@echo "Usage: make [target]"
+	@echo ""
+	@echo "target	description" | expand -t20
+	@echo "-----------------------------------"
+	@grep '^.PHONY: .* #' Makefile | sed 's/\.PHONY: \(.*\) # \(.*\)/\1	\2/' | expand -t20
+
+default: test build

README.md

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+# qr

go.mod

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+module qr
+
+go 1.13
+
+require github.com/skip2/go-qrcode v0.0.0-20191027152451-9434209cb086

go.sum

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+github.com/skip2/go-qrcode v0.0.0-20191027152451-9434209cb086 h1:RYiqpb2ii2Z6J4x0wxK46kvPBbFuZcdhS+CIztmYgZs=
+github.com/skip2/go-qrcode v0.0.0-20191027152451-9434209cb086/go.mod h1:PLPIyL7ikehBD1OAjmKKiOEhbvWyHGaNDjquXMcYABo=

main.go

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+package main
+
+import (
+	"fmt"
+	qrcode "github.com/skip2/go-qrcode"
+	"net/http"
+)
+
+func main() {
+	http.HandleFunc("/", func(w http.ResponseWriter, req *http.Request) {
+		website := req.URL.Query().Get("website")
+		if website != "" {
+			png, _ := qrcode.Encode(website, qrcode.Medium, 80)
+			w.Write(png)
+			return
+		}
+
+		w.WriteHeader(400)
+	})
+	fmt.Println(http.ListenAndServe(":8080", nil))
+}