drilla/elixir_printing_pdf_from html

## elixir_printing_pdf_from html
Using ELIXIR,
I need to print pdf from html "AS IS". with all background CSS images included an so on
- use https://github.com/gutschilla/elixir-pdf-generator
- use head-listed css styles
- use chromium render
  in your docker image you have to install
  - nodejs
  - puppeteer
  - chrome-headless pdf renderer
  - chromium (in case you app says "cannot find chrome executable" and stuff)
  - you must use in <body> style for correct background-image representation
    because default media = print, and it has a limitations
     body {
       -webkit-print-color-adjust: exact;
     }

  - you can use also png and svg images

  add to your dockerfile

#node js
RUN apt-get install -y curl bash ca-certificates openssl coreutils python2 make gcc g++ grep util-linux binutils findutils && apt-get update
ENV NVM_DIR  /root/.nvm

# lts release
ENV NODE_VERSION 12.18.3

#very important!!
ENV npm_config_user=root

#install puppeteer and headless
RUN curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.35.3/install.sh | bash \
    && . $NVM_DIR/nvm.sh \
    && nvm install $NODE_VERSION \
    && nvm alias default $NODE_VERSION \
    && nvm use default \
    && npm -g install chrome-headless-render-pdf puppeteer

# for puppeteer. doesnt work without it, i dont know why
RUN apt-get install -y chromium


in case you want to use WKHTMLTOPDF (chrome is a way better)
- do not use complex "background" url() + top + left and so on
  use separate background-image: ... and   background-position: ...
- use command line options
      --encoding UTF-8
      --enable-local-file-access
      --javascript-delay 3000 (in case you have js)
      --keep-relative-links (can be useful)
      --orientation landscape

      add to your Dockerfile
      #you can try to use newer release of wkhtml
      RUN curl -L https://github.com/wkhtmltopdf/wkhtmltopdf/releases/download/0.12.4/wkhtmltox-0.12.4_linux-generic-amd64.tar.xz | tar -xJ
      RUN cp wkhtmltox/bin/wk* /usr/local/bin/
	Using ELIXIR,
	I need to print pdf from html "AS IS". with all background CSS images included an so on
	- use https://github.com/gutschilla/elixir-pdf-generator
	- use head-listed css styles
	- use chromium render
	in your docker image you have to install
	- nodejs
	- puppeteer
	- chrome-headless pdf renderer
	- chromium (in case you app says "cannot find chrome executable" and stuff)
	- you must use in <body> style for correct background-image representation
	because default media = print, and it has a limitations
	body {
	-webkit-print-color-adjust: exact;
	}

	- you can use also png and svg images

	add to your dockerfile

	#node js
	RUN apt-get install -y curl bash ca-certificates openssl coreutils python2 make gcc g++ grep util-linux binutils findutils && apt-get update
	ENV NVM_DIR /root/.nvm

	# lts release
	ENV NODE_VERSION 12.18.3

	#very important!!
	ENV npm_config_user=root

	#install puppeteer and headless
	RUN curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.35.3/install.sh \| bash \
	&& . $NVM_DIR/nvm.sh \
	&& nvm install $NODE_VERSION \
	&& nvm alias default $NODE_VERSION \
	&& nvm use default \
	&& npm -g install chrome-headless-render-pdf puppeteer

	# for puppeteer. doesnt work without it, i dont know why
	RUN apt-get install -y chromium


	in case you want to use WKHTMLTOPDF (chrome is a way better)
	- do not use complex "background" url() + top + left and so on
	use separate background-image: ... and background-position: ...
	- use command line options
	--encoding UTF-8
	--enable-local-file-access
	--javascript-delay 3000 (in case you have js)
	--keep-relative-links (can be useful)
	--orientation landscape

	add to your Dockerfile
	#you can try to use newer release of wkhtml
	RUN curl -L https://github.com/wkhtmltopdf/wkhtmltopdf/releases/download/0.12.4/wkhtmltox-0.12.4_linux-generic-amd64.tar.xz \| tar -xJ
	RUN cp wkhtmltox/bin/wk* /usr/local/bin/