如何解决 python pdfkit 中的“wkhtmltopdf 报告错误：由于网络错误退出代码 1：ProtocolUnknownError”
[英]How to solve "wkhtmltopdf reported an error: Exit with code 1 due to network error: ProtocolUnknownError" in python pdfkit
问题描述
I'm using Django.
我正在使用 Django。 This is code is in views.py.这是代码在views.py 中。
def download_as_pdf_view(request, doc_type, pk):
import pdfkit
file_name = 'invoice.pdf'
pdf_path = os.path.join(settings.BASE_DIR, 'static', 'pdf', file_name)
template = get_template("paypal/card_invoice_detail.html")
_html = template.render({})
pdfkit.from_string(_html, pdf_path)
return FileResponse(open(pdf_path, 'rb'), filename=file_name, content_type='application/pdf')
Traceback is below.追溯如下。
[2022-09-05 00:56:35,785] ERROR [django.request.log_response:224] Internal Server Error: /paypal/download_pdf/card_invoice/MTE0Nm1vamlva29zaGkz/
Traceback (most recent call last):
File "/usr/local/lib/python3.8/site-packages/django/core/handlers/exception.py", line 47, in inner
response = get_response(request)
File "/usr/local/lib/python3.8/site-packages/django/core/handlers/base.py", line 181, in _get_response
response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "/opt/project/app/paypal/views.py", line 473, in download_as_pdf_view
pdfkit.from_string(str(_html), pdf_path)
File "/usr/local/lib/python3.8/site-packages/pdfkit/api.py", line 75, in from_string
return r.to_pdf(output_path)
File "/usr/local/lib/python3.8/site-packages/pdfkit/pdfkit.py", line 201, in to_pdf
self.handle_error(exit_code, stderr)
File "/usr/local/lib/python3.8/site-packages/pdfkit/pdfkit.py", line 155, in handle_error
raise IOError('wkhtmltopdf reported an error:\n' + stderr)
OSError: wkhtmltopdf reported an error:
Exit with code 1 due to network error: ProtocolUnknownError
[2022-09-05 00:56:35,797] ERROR [django.server.log_message:161] "GET /paypal/download_pdf/card_invoice/MTE0Nm1vamlva29zaGkz/ HTTP/1.1" 500 107486
This is work file.这是工作文件。
pdfkit.from_url('https://google.com', 'google.pdf')
However pdfkit.from_string and pdfkit.from_file return "ProtocolUnknownError"但是pdfkit.from_string和pdfkit.from_file返回“ProtocolUnknownError”
Please help me!请帮我！
Update更新
I tyied this code.我绑定了这段代码。
_html = '''<html><body><h1>Hello world</h1></body></html>'''
pdfkit.from_string(_html), pdf_path)
It worked fine.它工作得很好。 I saved above html as sample.html.我将上面的 html 保存为 sample.html。 Then run this code然后运行这段代码
- I added this parameter
options={"enable-local-file-access": ""}我添加了这个参数options={"enable-local-file-access": ""}
_html = render_to_string('path/to/sample.html')
pdfkit.from_string(str(_html), pdf_path, options={"enable-local-file-access": ""})
It worked fine!效果很好！ And the "ProtocolUnknownError" error is gone thanks to options={"enable-local-file-access": ""} .由于options={"enable-local-file-access": ""} ，“ProtocolUnknownError”错误消失了。
So, I changed the HTML file path to the one I really want to use.因此，我将 HTML 文件路径更改为我真正想要使用的路径。
_html = render_to_string('path/to/invoice.html')
pdfkit.from_string(_html, pdf_path, options={"enable-local-file-access": ""})
return FileResponse(open(pdf_path, 'rb'), filename=file_name, content_type='application/pdf')
It does not finish convert pdf.它没有完成转换 pdf。 When I run the code line by line.当我逐行运行代码时。
stdout, stderr = result.communicate(input=input) does not return. stdout, stderr = result.communicate(input=input)不返回。
It was processing long time.它处理了很长时间。
1 个解决方案
解决方案1
0 2022-09-05 01:21:27
I solved this problem.我解决了这个问题。 Theare are 3 step to pass this problems.有 3 个步骤可以解决这个问题。
You need to set options
{"enable-local-file-access": ""}.您需要设置选项{"enable-local-file-access": ""}。pdfkit.from_string(_html, pdf_path, options={"enable-local-file-access": ""})pdfkit.from_string()can't load css from URL.pdfkit.from_string()无法从 URL 加载 css。 It's something like this.是这样的。 <link rel="stylesheet" href="https://path/to/style.css">css path should be absolute path or writestylein same file.<link rel="stylesheet" href="https://path/to/style.css">css 路径应为绝对路径或在同一文件中写入style。If css file load another file.
如果 css 文件加载另一个文件。 ex: font file.例如：字体文件。 It will be ContentNotFoundError.它将是ContentNotFoundError。
My solution我的解决方案
I used simple css file like this.我使用了这样的简单 css 文件。
body {
font-size: 18px;
padding: 55px;
}
h1 {
font-size: 38px;
}
h2 {
font-size: 28px;
}
h3 {
font-size: 24px;
}
h4 {
font-size: 20px;
}
table, th, td {
margin: auto;
text-align: center;
border: 1px solid;
}
table {
width: 80%;
}
.text-right {
text-align: right;
}
.text-left {
text-align: left;
}
.text-center {
text-align: center;
}
This code insert last css file as style in same html.此代码将最后一个 css 文件插入为相同 html 中的样式。
import os
import pdfkit
from django.http import FileResponse
from django.template.loader import render_to_string
from paypal.models import Invoice
from website import settings
def download_as_pdf_view(request, pk):
# create base invoice html from template file.
invoice = Invoice.objects.get(pk=pk)
context = {
# please set your contexts as dict.
}
_html = render_to_string('paypal/card_invoice_detail.html', context)
# remove header
_html = _html[_html.find('<body>'):]
# create new header
new_header = '''<!DOCTYPE html>
<html lang="ja">
<head>
<meta charset="utf-8"/>
</head>
<style>
'''
# add style from css file. please change to your css file path.
css_path = os.path.join(settings.BASE_DIR, 'paypal', 'static', 'paypal', 'css', 'invoice.css')
with open(css_path, 'r') as f:
new_header += f.read()
new_header += '\n</style>'
print(new_header)
# add head to html
_html = new_header + _html[_html.find('<body>'):]
with open('paypal/sample.html', 'w') as f: f.write(_html) # for debug
# convert html to pdf
file_name = 'invoice.pdf'
pdf_path = os.path.join(settings.BASE_DIR, 'static', 'pdf', file_name)
pdfkit.from_string(_html, pdf_path, options={"enable-local-file-access": ""})
return FileResponse(open(pdf_path, 'rb'), filename=file_name, content_type='application/pdf')
声明:本站的技术帖子网页，遵循CC BY-SA 4.0协议，如果您需要转载，请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.