Renderuj HTML do PDF w witrynie Django

Question

Renderuj HTML do PDF w witrynie Django

Dla mojej strony django, Szukam łatwego rozwiązania do konwersji dynamicznych stron html na pdf.

Strony zawierają HTML i wykresy z Google visualization API (który jest oparty na javascript, ale włączenie tych wykresów jest koniecznością).

107

python html pdf pdf-generation django

Author: Olli, 2009-09-04

Source

7 answers

Https://github.com/nigma/django-easy-pdf

Szablon:

{% extends "easy_pdf/base.html" %}

{% block content %}
    <div id="content">
        <h1>Hi there!</h1>
    </div>
{% endblock %}

Widok:

from easy_pdf.views import PDFTemplateView

class HelloPDFView(PDFTemplateView):
    template_name = "hello.html"

Jeśli chcesz użyć django-easy-pdf na Pythonie 3 Sprawdź proponowane rozwiązanie tutaj .

10

Author: laffuste,
Warning: date(): Invalid date.timezone value 'Europe/Kyiv', we selected the timezone 'UTC' for now. in /var/www/agent_stack/data/www/doraprojects.net/template/agent.layouts/content.php on line 54
2017-05-23 11:55:07

Podniosłem to dla CBV. Nie używany w produkcji, ale generuje dla mnie plik PDF. Prawdopodobnie wymaga pracy po stronie zgłaszania błędów, ale robi sztuczkę do tej pory.

import StringIO
from cgi import escape
from xhtml2pdf import pisa
from django.http import HttpResponse
from django.template.response import TemplateResponse
from django.views.generic import TemplateView

class PDFTemplateResponse(TemplateResponse):

    def generate_pdf(self, retval):

        html = self.content

        result = StringIO.StringIO()
        rendering = pisa.pisaDocument(StringIO.StringIO(html.encode("ISO-8859-1")), result)

        if rendering.err:
            return HttpResponse('We had some errors<pre>%s</pre>' % escape(html))
        else:
            self.content = result.getvalue()

    def __init__(self, *args, **kwargs):
        super(PDFTemplateResponse, self).__init__(*args, mimetype='application/pdf', **kwargs)
        self.add_post_render_callback(self.generate_pdf)


class PDFTemplateView(TemplateView):
    response_class = PDFTemplateResponse

Używane jak:

class MyPdfView(PDFTemplateView):
    template_name = 'things/pdf.html'

9

Author: Christian Jensen,
Warning: date(): Invalid date.timezone value 'Europe/Kyiv', we selected the timezone 'UTC' for now. in /var/www/agent_stack/data/www/doraprojects.net/template/agent.layouts/content.php on line 54
2012-12-19 21:11:38

Spróbuj wkhtmltopdf z jedną z następujących owijarek

Django-wkhtmltopdf lub python-pdfkit

To działało świetnie dla mnie, obsługuje javascript i css lub cokolwiek, co obsługuje przeglądarka webkit.

Aby uzyskać bardziej szczegółowy samouczek, zobacz ten blog post

8

Author: jithin,
Warning: date(): Invalid date.timezone value 'Europe/Kyiv', we selected the timezone 'UTC' for now. in /var/www/agent_stack/data/www/doraprojects.net/template/agent.layouts/content.php on line 54
2016-07-16 11:01:43

Po próbach, aby to działało przez zbyt wiele godzin, w końcu znalazłem to: https://github.com/vierno/django-xhtml2pdf

To widelec https://github.com/chrisglass/django-xhtml2pdf który dostarcza mixin dla ogólnego widoku opartego na klasach. Użyłem go tak:

    # views.py
    from django_xhtml2pdf.views import PdfMixin
    class GroupPDFGenerate(PdfMixin, DetailView):
        model = PeerGroupSignIn
        template_name = 'groups/pdf.html'

    # templates/groups/pdf.html
    <html>
    <style>
    @page { your xhtml2pdf pisa PDF parameters }
    </style>
    </head>
    <body>
        <div id="header_content"> (this is defined in the style section)
            <h1>{{ peergroupsignin.this_group_title }}</h1>
            ...

Podczas wypełniania pól szablonu użyj nazwy modelu zdefiniowanej w widoku we wszystkich małych literach. Ponieważ jest to GCBV, możesz go po prostu nazwać". as_view " w swoim urls.py:

    # urls.py (using url namespaces defined in the main urls.py file)
    url(
        regex=r"^(?P<pk>\d+)/generate_pdf/$",
        view=views.GroupPDFGenerate.as_view(),
        name="generate_pdf",
       ),

2

Author: tthayer,
Warning: date(): Invalid date.timezone value 'Europe/Kyiv', we selected the timezone 'UTC' for now. in /var/www/agent_stack/data/www/doraprojects.net/template/agent.layouts/content.php on line 54
2015-04-03 22:48:41

Możesz użyć edytora iReport, aby zdefiniować układ i opublikować raport w jasper reports server. Po opublikowaniu możesz wywołać rest api, aby uzyskać wyniki.

Oto test funkcjonalności:

from django.test import TestCase
from x_reports_jasper.models import JasperServerClient

"""
    to try integraction with jasper server through rest
"""
class TestJasperServerClient(TestCase):

    # define required objects for tests
    def setUp(self):

        # load the connection to remote server
        try:

            self.j_url = "http://127.0.0.1:8080/jasperserver"
            self.j_user = "jasperadmin"
            self.j_pass = "jasperadmin"

            self.client = JasperServerClient.create_client(self.j_url,self.j_user,self.j_pass)

        except Exception, e:
            # if errors could not execute test given prerrequisites
            raise

    # test exception when server data is invalid
    def test_login_to_invalid_address_should_raise(self):
        self.assertRaises(Exception,JasperServerClient.create_client, "http://127.0.0.1:9090/jasperserver",self.j_user,self.j_pass)

    # test execute existent report in server
    def test_get_report(self):

        r_resource_path = "/reports/<PathToPublishedReport>"
        r_format = "pdf"
        r_params = {'PARAM_TO_REPORT':"1",}

        #resource_meta = client.load_resource_metadata( rep_resource_path )

        [uuid,out_mime,out_data] = self.client.generate_report(r_resource_path,r_format,r_params)
        self.assertIsNotNone(uuid)

A oto przykład implementacji wywołania:

from django.db import models
import requests
import sys
from xml.etree import ElementTree
import logging 

# module logger definition
logger = logging.getLogger(__name__)

# Create your models here.
class JasperServerClient(models.Manager):

    def __handle_exception(self, exception_root, exception_id, exec_info ):
        type, value, traceback = exec_info
        raise JasperServerClientError(exception_root, exception_id), None, traceback

    # 01: REPORT-METADATA 
    #   get resource description to generate the report
    def __handle_report_metadata(self, rep_resourcepath):

        l_path_base_resource = "/rest/resource"
        l_path = self.j_url + l_path_base_resource
        logger.info( "metadata (begin) [path=%s%s]"  %( l_path ,rep_resourcepath) )

        resource_response = None
        try:
            resource_response = requests.get( "%s%s" %( l_path ,rep_resourcepath) , cookies = self.login_response.cookies)

        except Exception, e:
            self.__handle_exception(e, "REPORT_METADATA:CALL_ERROR", sys.exc_info())

        resource_response_dom = None
        try:
            # parse to dom and set parameters
            logger.debug( " - response [data=%s]"  %( resource_response.text) )
            resource_response_dom = ElementTree.fromstring(resource_response.text)

            datum = "" 
            for node in resource_response_dom.getiterator():
                datum = "%s<br />%s - %s" % (datum, node.tag, node.text)
            logger.debug( " - response [xml=%s]"  %( datum ) )

            #
            self.resource_response_payload= resource_response.text
            logger.info( "metadata (end) ")
        except Exception, e:
            logger.error( "metadata (error) [%s]" % (e))
            self.__handle_exception(e, "REPORT_METADATA:PARSE_ERROR", sys.exc_info())


    # 02: REPORT-PARAMS 
    def __add_report_params(self, metadata_text, params ):
        if(type(params) != dict):
            raise TypeError("Invalid parameters to report")
        else:
            logger.info( "add-params (begin) []" )
            #copy parameters
            l_params = {}
            for k,v in params.items():
                l_params[k]=v
            # get the payload metadata
            metadata_dom = ElementTree.fromstring(metadata_text)
            # add attributes to payload metadata
            root = metadata_dom #('report'):

            for k,v in l_params.items():
                param_dom_element = ElementTree.Element('parameter')
                param_dom_element.attrib["name"] = k
                param_dom_element.text = v
                root.append(param_dom_element)

            #
            metadata_modified_text =ElementTree.tostring(metadata_dom, encoding='utf8', method='xml')
            logger.info( "add-params (end) [payload-xml=%s]" %( metadata_modified_text )  )
            return metadata_modified_text



    # 03: REPORT-REQUEST-CALL 
    #   call to generate the report
    def __handle_report_request(self, rep_resourcepath, rep_format, rep_params):

        # add parameters
        self.resource_response_payload = self.__add_report_params(self.resource_response_payload,rep_params)

        # send report request

        l_path_base_genreport = "/rest/report"
        l_path = self.j_url + l_path_base_genreport
        logger.info( "report-request (begin) [path=%s%s]"  %( l_path ,rep_resourcepath) )

        genreport_response = None
        try:
            genreport_response = requests.put( "%s%s?RUN_OUTPUT_FORMAT=%s" %(l_path,rep_resourcepath,rep_format),data=self.resource_response_payload, cookies = self.login_response.cookies )
            logger.info( " - send-operation-result [value=%s]"  %( genreport_response.text) )
        except Exception,e:
            self.__handle_exception(e, "REPORT_REQUEST:CALL_ERROR", sys.exc_info())


        # parse the uuid of the requested report
        genreport_response_dom = None

        try:
            genreport_response_dom = ElementTree.fromstring(genreport_response.text)

            for node in genreport_response_dom.findall("uuid"):
                datum = "%s" % (node.text)

            genreport_uuid = datum      

            for node in genreport_response_dom.findall("file/[@type]"):
                datum = "%s" % (node.text)
            genreport_mime = datum

            logger.info( "report-request (end) [uuid=%s,mime=%s]"  %( genreport_uuid, genreport_mime) )

            return [genreport_uuid,genreport_mime]
        except Exception,e:
            self.__handle_exception(e, "REPORT_REQUEST:PARSE_ERROR", sys.exc_info())

    # 04: REPORT-RETRIEVE RESULTS 
    def __handle_report_reply(self, genreport_uuid ):


        l_path_base_getresult = "/rest/report"
        l_path = self.j_url + l_path_base_getresult 
        logger.info( "report-reply (begin) [uuid=%s,path=%s]"  %( genreport_uuid,l_path) )

        getresult_response = requests.get( "%s%s/%s?file=report" %(self.j_url,l_path_base_getresult,genreport_uuid),data=self.resource_response_payload, cookies = self.login_response.cookies )
        l_result_header_mime =getresult_response.headers['Content-Type']

        logger.info( "report-reply (end) [uuid=%s,mime=%s]"  %( genreport_uuid, l_result_header_mime) )
        return [l_result_header_mime, getresult_response.content]

    # public methods ---------------------------------------    

    # tries the authentication with jasperserver throug rest
    def login(self, j_url, j_user,j_pass):
        self.j_url= j_url

        l_path_base_auth = "/rest/login"
        l_path = self.j_url + l_path_base_auth

        logger.info( "login (begin) [path=%s]"  %( l_path) )

        try:
            self.login_response = requests.post(l_path , params = {
                    'j_username':j_user,
                    'j_password':j_pass
                })                  

            if( requests.codes.ok != self.login_response.status_code ):
                self.login_response.raise_for_status()

            logger.info( "login (end)" )
            return True
            # see http://blog.ianbicking.org/2007/09/12/re-raising-exceptions/

        except Exception, e:
            logger.error("login (error) [e=%s]" % e )
            self.__handle_exception(e, "LOGIN:CALL_ERROR",sys.exc_info())
            #raise

    def generate_report(self, rep_resourcepath,rep_format,rep_params):
        self.__handle_report_metadata(rep_resourcepath)
        [uuid,mime] = self.__handle_report_request(rep_resourcepath, rep_format,rep_params)
        # TODO: how to handle async?
        [out_mime,out_data] = self.__handle_report_reply(uuid)
        return [uuid,out_mime,out_data]

    @staticmethod
    def create_client(j_url, j_user, j_pass):
        client = JasperServerClient()
        login_res = client.login( j_url, j_user, j_pass )
        return client


class JasperServerClientError(Exception):

    def __init__(self,exception_root,reason_id,reason_message=None):
        super(JasperServerClientError, self).__init__(str(reason_message))
        self.code = reason_id 
        self.description = str(exception_root) + " " + str(reason_message)
    def __str__(self):
        return self.code + " " + self.description

1

Author: andhdo,
Warning: date(): Invalid date.timezone value 'Europe/Kyiv', we selected the timezone 'UTC' for now. in /var/www/agent_stack/data/www/doraprojects.net/template/agent.layouts/content.php on line 54
2013-09-24 19:15:27

Otrzymuję kod do wygenerowania pliku PDF z szablonu html:

    import os

    from weasyprint import HTML

    from django.template import Template, Context
    from django.http import HttpResponse 


    def generate_pdf(self, report_id):

            # Render HTML into memory and get the template firstly
            template_file_loc = os.path.join(os.path.dirname(__file__), os.pardir, 'templates', 'the_template_pdf_generator.html')
            template_contents = read_all_as_str(template_file_loc)
            render_template = Template(template_contents)

            #rendering_map is the dict for params in the template 
            render_definition = Context(rendering_map)
            render_output = render_template.render(render_definition)

            # Using Rendered HTML to generate PDF
            response = HttpResponse(content_type='application/pdf')
            response['Content-Disposition'] = 'attachment; filename=%s-%s-%s.pdf' % \
                                              ('topic-test','topic-test', '2018-05-04')
            # Generate PDF
            pdf_doc = HTML(string=render_output).render()
            pdf_doc.pages[0].height = pdf_doc.pages[0]._page_box.children[0].children[
                0].height  # Make PDF file as single page file 
            pdf_doc.write_pdf(response)
            return response

    def read_all_as_str(self, file_loc, read_method='r'):
        if file_exists(file_loc):
            handler = open(file_loc, read_method)
            contents = handler.read()
            handler.close()
            return contents
        else:
            return 'file not exist'

0

Author: Deft-pawN,
Warning: date(): Invalid date.timezone value 'Europe/Kyiv', we selected the timezone 'UTC' for now. in /var/www/agent_stack/data/www/doraprojects.net/template/agent.layouts/content.php on line 54
2018-06-17 11:30:59

score 198 · Accepted Answer

Wypróbuj Rozwiązanie z Reportlab.

Pobierz go i zainstaluj jak zwykle w Pythonie setup.py install

Będziesz również musiał zainstalować następujące moduły: xhtml2pdf, html5lib, pypdf z easy_install.

Oto przykład użycia:

Najpierw zdefiniuj tę funkcję:

import cStringIO as StringIO
from xhtml2pdf import pisa
from django.template.loader import get_template
from django.template import Context
from django.http import HttpResponse
from cgi import escape


def render_to_pdf(template_src, context_dict):
    template = get_template(template_src)
    context = Context(context_dict)
    html  = template.render(context)
    result = StringIO.StringIO()

    pdf = pisa.pisaDocument(StringIO.StringIO(html.encode("ISO-8859-1")), result)
    if not pdf.err:
        return HttpResponse(result.getvalue(), content_type='application/pdf')
    return HttpResponse('We had some errors<pre>%s</pre>' % escape(html))

Następnie możesz użyć go w następujący sposób:

def myview(request):
    #Retrieve data or whatever you need
    return render_to_pdf(
            'mytemplate.html',
            {
                'pagesize':'A4',
                'mylist': results,
            }
        )

Szablon:

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
    <head>
        <title>My Title</title>
        <style type="text/css">
            @page {
                size: {{ pagesize }};
                margin: 1cm;
                @frame footer {
                    -pdf-frame-content: footerContent;
                    bottom: 0cm;
                    margin-left: 9cm;
                    margin-right: 9cm;
                    height: 1cm;
                }
            }
        </style>
    </head>
    <body>
        <div>
            {% for item in mylist %}
                RENDER MY CONTENT
            {% endfor %}
        </div>
        <div id="footerContent">
            {%block page_foot%}
                Page <pdf:pagenumber>
            {%endblock%}
        </div>
    </body>
</html>

Mam nadzieję, że to pomoże.