ubuntu1604 python3.6 pdfkit html to pdf

1. Install wkhtmltopdf

pdfkit is a package of python for wkhtmlpdf, so you need to install the wkhtmltopdf package on the environment first

download link: https://wkhtmltopdf.org/downloads.html

(1) uname -m view system architecture

(2) x86_64 selection Ubuntu 16.04 (xenial)amd6, Right click to copy the download link.

Download, wgethttps://downloads.wkhtmltopdf.org/0.12/0.12.5/wkhtmltox_0.12.5-1.xenial_amd64.deb

(3) Installation

dpkg -i wkhtmltox_0.12.5-1.xenial_amd64.deb

(4) Test

wkhtmltopdf "www.baidu.com" test.pdf

2. Install pdfkit

pip install pdfkit

3. Python coding

In order to implement the web interface "export file as pdf", I use the restful, tornado framework.

To export files, you need to set the content-type and content-disposition of the header.

MIME：https://developer.mozilla.org/zh-CN/docs/Web/HTTP/Basics_of_HTTP/MIME_types

Content-Disposition： https://developer.mozilla.org/zh-CN/docs/Web/HTTP/Headers/Content-Disposition

（1）content-type : application/pdf

（2）Content-Disposition: "attachment; filename.pdf"

@Route(r'contract/exporttopdf')
class ExportContractHandler(BaseContractHandler):
    @coroutine
    def get(self):
                 # Query saved html string
        html_str = yield self.query_contract_edit_info()

                 # Convert to pdf, set title
        pdf = self.pdfkit_str(html_str=html_str, title="my contract")

                 # Set the header to download the attachment, and set the name of the downloaded file
        self.set_header("content_type", "application/pdf")
        self.set_header("Content-Disposition", 'attachment; filename=contract-{}.pdf'.format(int(time.time())))
        self.write(pdf)


@staticmethod
def pdfkit_str(html_str, title):
    options = {
                 "title": title, # document title
                 'page-size':'A4', # A4 paper
        'margin-top': '0in',
        'margin-right': '0in',
        'margin-bottom': '0in',
        'margin-left': '0in',
                 'encoding': "UTF-8", # Chinese
        # 'custom-header': [
        #     ('Accept-Encoding', 'gzip')
        # ],
                 'quiet':'', # By default, all wkhtmltopdf output will be displayed, do not want to see the need to pass quiet options
        # 'cookie': [
        #     ('cookie-name1', 'cookie-value1'),
        #     ('cookie-name2', 'cookie-value2'),
        # ],
                 # "header-right": "Page [page] of [toPage]", # page
                 #'no-outline': None, # Don't list, outline depth is invalid
                 #'outline-depth': 5, # depth of outline
                 #'enable-forms': True # forms
    }
         cover = "" # cover
         css = "" # css style
         toc ='' # directory
    pdfkit.from_string(
        html_str,
        'temp.pdf',
        options=options,
        cover=cover,
        css=css,
        toc=toc
    )
    try:
        with open('temp.pdf', "rb") as f:
            return f.read()
    except:
        raise Exception("Read pdf file error")

4. Chinese font problem

One test found that all Chinese is spoken! What's going on?

One of the reasons: It turns out that ubuntu is missing Chinese fonts!

There is an article here for reference:

https://www.ostechnix.com/install-microsoft-windows-fonts-ubuntu-16-04/

I used to copy the font under window to ubuntu to solve

Install Chinese fonts:
         1. View the currently installed fonts: fc-list
         2. Create a directory: mkdir /usr/share/fonts/zh_CN
         3. Copy the Chinese font of C:\Windows\Fonts under windows to /usr/share/fonts/zh_CN
         4. Execute fc-cache -fv
         5. Check if fc-list is installed

After solving:

On the centos system, I tried Chinese and still had problems! NO! But still solved.

Reason 2: The character set of html needs to be set to utf8

<head><meta charset="UTF-8"></head>

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