QR Code generator Docker Image

Description

Small docker image with QR code generator tool (libqrencode) based on Alpine linux. Can generate QR codes in SVG, PNG, PNG32, EPS, XPM, ANSI, ANSI256, ASCII formats.

For more info see https://github.com/fukuchi/libqrencode

Usage

For qrencode usage and command line options run:

docker run --rm dhlavaty/qrcode qrencode --help

Basic usage

# Encode 'My message' string into QR code image in PNG format
$ echo -n "My message" | docker run --rm -i dhlavaty/qrcode qrencode -o - > output.png

# Encode 'My message' string into QR code image in SVG format
$ echo -n "My message" | docker run --rm -i dhlavaty/qrcode qrencode -t SVG -o - > output.svg

# Encode 'My message' string into QR code image in SVG format, with highest error correction level
$ echo -n "My message" | docker run --rm -i dhlavaty/qrcode qrencode -l H -t SVG -o - > output.svg

Some advanced examples

# QR code to send SMS to number '+12345' with text 'Text to send in SMS!'
$ echo -n "SMSTO:+12345:Text to send in SMS!" | docker run --rm -i dhlavaty/qrcode qrencode -o - > output.png

# QR code with phone number '+12345'
$ echo -n "tel:+12345" | docker run --rm -i dhlavaty/qrcode qrencode -o - > output.png

# QR code to connect to open WIFI network 'networkname' (without password)
$ echo -n "WIFI:S:networkname;;" | docker run --rm -i dhlavaty/qrcode qrencode -o - > output.png

# QR code to connect to WIFI network 'networkname' with password '123'
$ echo -n "WIFI:S:networkname;P:123;;" | docker run --rm -i dhlavaty/qrcode qrencode -o - > output.png

# QR code to connect to WIFI network 'networkname' with password '123' (WPA / WPA2)
$ echo -n "WIFI:T:WPA;S:networkname;P:123;;" | docker run --rm -i dhlavaty/qrcode qrencode -o - > output.png

# QR code to send email to 'email@example.com' with subject 'subject' and email body 'email text'
$ echo -n "mailto:email@example.com?subject=subject&body=email text" | docker run --rm -i dhlavaty/qrcode qrencode -o - > output.png

Docker build

Build multi-arch image:

$ docker buildx create --name mybuilder
$ docker buildx use mybuilder

# (Optional) check your builder
$ docker buildx inspect

$ docker buildx build --platform linux/amd64,linux/arm64 --tag dhlavaty/qrcode . --push

# (Optional) Inspect your image
$ docker buildx imagetools inspect dhlavaty/qrcode

Lint dockerfile:

$ docker run --rm -i hadolint/hadolint < Dockerfile

License

This project is licensed under MIT - http://opensource.org/licenses/MIT