I want to take a screenshot of the site on Docker using any font

Purpose: I want to take a screenshot of the site using any font on Docker, plus I want to test

There is an article until I take a screenshot, but I couldn't find an article in Japanese that I did until I set an arbitrary font, so I wrote it.

All sources are here https://github.com/frkwy/xvfb_screenshot_on_docker

The fonts and sentences used this time are [High school girl style? Download the cute extra-fine font "JK Gothic L" | Font and Cute font [http://font.cutegirl.jp/jk-font-light.html) Aozora Bunko Natsume Soseki I am a cat I used.

Check fonts and check priorities

The solution is to raise the priority of the font you want to use. fc-list: Font list If it is not here, the font is not installed. This time it's Firefox It's OK if the font you want to use when you execute fc-match -s sarif is at the top. For that, we will create font.conf.

Dockerfile

FROM alpine:latest

COPY fonts.conf /root/.config/fontconfig/
# Please override your favorite font file path
COPY JKG-L_3.ttf /root/.local/share/fonts/

RUN apk update && apk add python3 xvfb firefox dbus && rm -rf /var/cache/apk/*
RUN python3 -m ensurepip
RUN pip3 install --upgrade pip selenium xvfbwrapper

RUN fc-cache -fv

CMD ["python3", "/host/example.py"]

font.conf Assuming that the font is already installed in the above Dockerfile, Bring the priority of the font you want to use to the top with binding =" strong ".

<?xml version="1.0"?>
<!DOCTYPE fontconfig SYSTEM "fonts.dtd">
<fontconfig>
   <match target="pattern">
        <edit name="family" mode="assign" binding="strong">
           <string>JK Gothic L</string>
        </edit>
    </match>
</fontconfig>

This is a screenshot actually taken. Screenshot_from_2016-03-21 20:30:14.png

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