python之Unicode解码错误: Django Generate PDF with weasyprint

我正在用 Django 制作一个应用程序。我想在浏览选择链接时生成 pdf。所以我使用 weasyprint 模块来转换我的 pdf。我导入 weasyprint 模块。但是当我运行那个应用程序时，我发现了一些错误。 这是views.py文件

def customersProfile(request, customer_id, sys_type): 
    sys_type=sys_type 
    area="profile" 
    site_credit = site_credit1 
    time_now=timezone.now() 
    customers=get_object_or_404(CustomerInfo, pk=customer_id) 
 
    html_string = render_to_string('shop/profile.html', {'customers': customers, 'todaydate': today_date,'site_name': 'Moon Telecom', 'time_now': time_now, 'site_credit': site_credit, 'area': area}) 
    html = HTML(string=html_string) 
    result = html.write_pdf() 
 
 
    response = HttpResponse(content_type='application/pdf;') 
    response['Content-Disposition'] = 'inline; filename=list_people.pdf' 
    response['Content-Transfer-Encoding'] = 'binary' 
    with tempfile.NamedTemporaryFile(delete=True) as output: 
        output.write(result) 
        output.flush() 
        output = open(output.name, 'r') 
        response.write(output.read()) 
 
    return response 

这是HTML 文件。我想创建 pdf 这个 html 文件。

<!DOCTYPE html> 
<html> 
 
<head> 
    <meta name="viewport" content="width=device-width, initial-scale=1"> 
    <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css"> 
    <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script> 
    <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script> 
</head> 
 
<body style> 
 
    <div class="container"> 
        <div class="row"> 
            <div class="col-lg-12"> 
                <div class="site_title" style="text-align:center; margin:0 auto"> 
                    <h3>মুন টেলিকম</h3> 
                    <h3> 
                        <a href="{% url 'shop:index' %}" target="_blank">{{site_name}}</a> 
                    </h3> 
                    <div class="invoice_info_one" style="width:100%; text-align:center"> 
                        <p>সকল প্রকার মোবাইল সেট, সীম কার্ড, মেমোরী কার্ড, MP-3, সোলার চার্জার, সোলার ফ্যান, মোবাইল ফোনের ব্যাটারী, চার্জার, ক্যাচিং,কাভার,হেডফোন, রেবন, ডিসপ্লে এবং ইলেট্রিক মালামাল বিক্রেতা</p> 
                    </div> 
                    <div class="invoice_location"> 
                        <p>জাহাঙ্গীর সুপার মার্কেট, ব্রীজ রোড, ফুলহাতা বাজার, মোডেলগঞ্জ।</p> 
                    </div> 
                    <div class="invoice_contact"> 
                        <p>01717-051200(সুকান্ত) 01828-163858(দোকান)</p> 
                        <p><b>Email:</b> moontelecom2008@gmail.com</p> 
                    </div> 
                    <div class="copy_right"> 
                        {% if site_credit %} 
                         <p>{{site_credit}}</p> 
                        {% else %} 
                            <a href="{% url 'shop:nothing' %}">#</a> 
                        {% endif %} 
                        <p></p> 
                    </div> 
 
 
                    <hr> 
                </div> 
            </div> 
        </div> 
        <div class="container"> 
            <div class="row"> 
                <div class="col-lg-12"> 
                    <div class="customer_info"> 
                        {% if customers.customer_name %} 
                        <h2 style="font-size:15px">Customer Name: 
                            <b> {{customers.customer_name}}</b> 
                        </h2> 
                        {% else %} <p> Name: দেওয়া হয়নি</p> {% endif %} 
 
                        <p style="font-size:14px">Phone Number: 
                            {% if customers.customer_mobile_no %} 
                             {{customers.customer_mobile_no}} 
                            {% else %} 
                            No Mobile Number 
                            {% endif %} 
                        </p> 
                        <p style="font-size:14px">Purchase Time: {{customers.customer_sell_date}}</p> 
                        <p style="font-size:14px">invoice id: <b>{{customers.customer_uid}}</b></p> 
                        <p>{{customers.product_warrenty}}</p> 
                    </div> 
 
                </div> 
            </div> 
        </div> 
        <div class="table table-bordered"> 
 
            <table class="table"> 
                <thead> 
                    <tr> 
 
 
                        <th>Product Name</th> 
                        <th>Product ID</th> 
                        <th>Warrenty</th> 
                        <th>QN</th> 
                        <th>Price</th> 
 
                    </tr> 
                </thead> 
                <tbody> 
                    <tr> 
 
 
                        <td>{{customers.customer_product_name}}</td> 
                        <td>{{customers.customer_product_id}}</td> 
 
                        <td>{% if customers.customer_product_warrenty == '' %} 
                        <b>No Warrenty</b> 
                        {% else %} 
                        <b> {{customers.customer_product_warrenty}}</b> Month</td> 
                        {% endif %} 
                        <td>{{customers.customer_product_quantity}}</td> 
 
                        <td>{{customers.customer_price}} Taka</td> 
 
 
                    </tr> 
 
                </tbody> 
                <tr> 
                    <td colspan="3"></td> 
 
                    <td colspan="1"> 
                        <b>Total Amount</b> 
                    </td> 
                    <td colspan="1"> 
                        <b>{{customers.customer_price}}</b> Taka</td> 
                </tr> 
            </table> 
             {% if customers.customer_conditions %} 
            <div class="warning"> 
                <p style="font-size:8px; width:500px;line-height:15px;"><i>{{customers.customer_product_name}} {{customers.customer_conditions}}</i></p> 
            </div> 
            {% else %} {% endif %} 
 
 
 
 
        </div> 
    </div> 
 
    <div class="footer"> 
        <div class="footer_info"> 
            <div class="container"> 
                <div class="row"> 
                    <div class="col-lg-12"> 
                       <div class="footer_info"> 
                        <p>Print date: {{time_now}}</p> 
                            <p> 
                                <b>বিঃদ্রঃ ডেলিভারির সময় মাল বুঝিয়া নিবেন। পরে কোন আপত্তী গ্রহনযোগ্য নয়</b> 
                            </p> 
                            <h5>বিক্রিত মাল ফেরত নেওয়া হয় না</h5> 
                       </div> 
                    </div> 
                </div> 
            </div> 
        </div> 
    </div> 
 
</body> 

当我浏览那个 url 时。我收到了这个错误。我试图解决这个错误。但我不能。

UnicodeDecodeError at /shop/1/customerpage/customerprofile/ 
'utf-8' codec can't decode byte 0xe2 in position 10: invalid continuation byte 
Request Method: GET 
Request URL:    http://127.0.0.1:8000/shop/1/customerpage/customerprofile/ 
Django Version: 1.11.6 
Exception Type: UnicodeDecodeError 
Exception Value:     
'utf-8' codec can't decode byte 0xe2 in position 10: invalid continuation byte 

这是完整的tracebook 环境:

Request Method: GET 
Request URL: http://127.0.0.1:8000/shop/1/customerpage/customerprofile/ 
 
Django Version: 1.11.6 
Python Version: 3.5.2 
Installed Applications: 
['shop.apps.ShopConfig', 
 'django.contrib.admin', 
 'django.contrib.auth', 
 'django.contrib.contenttypes', 
 'django.contrib.sessions', 
 'django.contrib.messages', 
 'django.contrib.staticfiles', 
 'crispy_forms', 
 'wkhtmltopdf'] 
Installed Middleware: 
['django.middleware.security.SecurityMiddleware', 
 'django.contrib.sessions.middleware.SessionMiddleware', 
 'django.middleware.common.CommonMiddleware', 
 'django.middleware.csrf.CsrfViewMiddleware', 
 'django.contrib.auth.middleware.AuthenticationMiddleware', 
 'django.contrib.messages.middleware.MessageMiddleware', 
 'django.middleware.clickjacking.XFrameOptionsMiddleware'] 
 
 
 
Traceback: 
 
File "/usr/local/lib/python3.5/dist-packages/django/core/handlers/exception.py" in inner 
  41.             response = get_response(request) 
 
File "/usr/local/lib/python3.5/dist-packages/django/core/handlers/base.py" in _get_response 
  187.                 response = self.process_exception_by_middleware(e, request) 
 
File "/usr/local/lib/python3.5/dist-packages/django/core/handlers/base.py" in _get_response 
  185.                 response = wrapped_callback(request, *callback_args, **callback_kwargs) 
 
File "/home/asad/Desktop/smartshop/django-app/shop/views.py" in customersProfile 
  333.         response.write(output.read()) 
 
File "/usr/lib/python3.5/codecs.py" in decode 
  321.         (result, consumed) = self._buffer_decode(data, self.errors, final) 
 
Exception Type: UnicodeDecodeError at /shop/1/customerpage/customerprofile/ 
Exception Value: 'utf-8' codec can't decode byte 0xe2 in position 10: invalid continuation byte 

请您参考如下方法:

您正在以文本模式阅读 pdf 文件 ('r')

>>> response = HttpResponse(content_type='application/pdf') 
>>> output = open('example.pdf', 'r') 
>>> response.write(output.read()) 
Traceback (most recent call last): 
  File "<stdin>", line 1, in <module> 
  ... 
    (result, consumed) = self._buffer_decode(data, self.errors, final) 
UnicodeDecodeError: 'utf-8' codec can't decode byte 0xe2 in position 10: invalid continuation byte 

但你需要使用二进制模式('rb')

>>> response = HttpResponse(content_type='application/pdf') 
>>> output = open('example.pdf', 'rb') 
>>> response.write(output.read()) 

当调用HttpResponse.write时，检查它的输入是str还是bytes；如果输入是 str 它将尝试对其进行编码，在这种情况下会导致错误。通过以二进制模式打开文件，您可以确保输入的是 bytes 并且不会尝试编码。