Initial commit

.gitignore

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+vendor

Dockerfile

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+FROM golang:1.9rc2-alpine as BUILDER
+MAINTAINER [email protected]
+
+RUN apk --no-cache add make
+WORKDIR /go/src/github.com/faas-and-furious/qrcode
+COPY . /go/src/github.com/faas-and-furious/qrcode
+
+RUN make
+
+FROM alpine
+
+COPY --from=builder /go/bin/qrcode /usr/bin
+ADD https://github.com/alexellis/faas/releases/download/0.6.0/fwatchdog /usr/bin
+RUN chmod +x /usr/bin/fwatchdog
+COPY --from=builder /go/bin/qrcode /usr/bin
+RUN chmod +x /usr/bin/qrcode
+
+ENV fprocess "/usr/bin/qrcode"
+
+CMD [ "/usr/bin/fwatchdog"]

Gopkg.toml

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+
+# Gopkg.toml example
+#
+# Refer to https://github.com/golang/dep/blob/master/docs/Gopkg.toml.md
+# for detailed Gopkg.toml documentation.
+#
+# required = ["github.com/user/thing/cmd/thing"]
+# ignored = ["github.com/user/project/pkgX", "bitbucket.org/user/project/pkgA/pkgY"]
+#
+# [[constraint]]
+#   name = "github.com/user/project"
+#   version = "1.0.0"
+#
+# [[constraint]]
+#   name = "github.com/user/project2"
+#   branch = "dev"
+#   source = "github.com/myfork/project2"
+#
+# [[override]]
+#  name = "github.com/x/y"
+#  version = "2.4.0"
+
+
+[[constraint]]
+  branch = "master"
+  name = "github.com/skip2/go-qrcode"

LICENSE

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+MIT License
+
+Copyright (c) 2017 
+
+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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+.PHONY: install image dependencies
+
+build: dependencies
+	@go install .
+
+image: 
+	@docker build -t faasandfurious/qrcode .
+
+dependencies:
+	@apk update
+	@apk add git
+	@rm -rf /var/cache/apk/*
+	@go get -u github.com/golang/dep/cmd/dep
+	@dep ensure

README.md

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+# FaaS qrcode
+
+[![Go Report Card](https://goreportcard.com/badge/github.com/faas-and-furious/qrcode)](https://goreportcard.com/report/github.com/faas-and-furious/qrcode) [![](https://images.microbadger.com/badges/image/faasandfurious/qrcode.svg)](https://microbadger.com/images/faasandfurious/qrcode "Get your own image badge on microbadger.com")
+
+This repo contains an example [FaaS](https://github.com/alexellis/faas) function which uses the [skip2/go-qrcode](https://github.com/skip2/go-qrcode) Go library to generate a QR Code for a string.
+
+## Deploying the Function
+
+Make sure you have deployed a FaaS stack to your cluster using the instructions on the [FaaS repo](https://github.com/alexellis/faas).
+
+### Use the CLI (`faas-cli`)
+
+**Get the CLI**
+
+The [faas-cli](https://github.com/alexellis/faas-cli/) can be installed via `brew install faas-cli` or `curl -sSL https://get.openfaas.com | sudo sh`.
+
+Now deploy the function as follows:
+
+```
+# faas-cli -action deploy -image=faasandfurious/qrcode -name=qrcode -fprocess="/usr/bin/qrcode"
+200 OK
+URL: http://localhost:8080/function/qrcode
+```
+
+### Testing the Function
+Now that the function is running in your FaaS environment you can test it from the command line by running:
+
+```
+$ curl localhost:8080/function/qrcode --data "https://github.com/alexellis/faas" > qrcode.png
+```
+
+![](images/qrcode.png)
+
+You can check the QR code works using your phone, or an online QR Code decoder ([ZXing Decoder Online](https://zxing.org/w/decode.jspx) for example)

function.go

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+package main
+
+import (
+	"encoding/binary"
+	"io/ioutil"
+	"log"
+	"os"
+
+	qrcode "github.com/skip2/go-qrcode"
+)
+
+func main() {
+	input, err := ioutil.ReadAll(os.Stdin)
+	if err != nil {
+		log.Fatalf("Unable to read standard input: %s", err.Error())
+	}
+	png, err := qrcode.Encode(string(input), qrcode.Medium, 256)
+	if err != nil {
+		log.Fatalf("Unable to read standard input: %s", err.Error())
+	}
+	binary.Write(os.Stdout, binary.LittleEndian, png)
+}