UnicodeDecodeError：Django使用weasyprint生成PDF

我正在用Django製作應用程序。我想在瀏覽選擇鏈接時生成pdf。所以我用weasyprint模塊轉換我的pdf。我導入weasyprint模塊。但是當我運行該應用程序時，我發現了一些錯誤。這是views.py文件UnicodeDecodeError：Django使用weasyprint生成PDF

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

這是HTML文件。我想創建PDF這個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> [email protected]</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>

當我瀏覽該網址時。我有這個錯誤。我正在努力解決這個錯誤。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

這個充滿tracebook 環境：

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

來源

2017-10-14 Asaduzzaman Sohel

您可以添加完整的追溯嗎？ – snakecharmerb

我加了。請檢查一下。 –

您正在閱讀的文本模式（'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

的PDF文件，但你需要使用二進制模式（'rb'）

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

當調用HttpResponse.write時，檢查其輸入是str還是bytes;如果輸入是str，它將嘗試編碼它，在這種情況下會導致錯誤。通過以二進制模式打開文件，確保輸入是bytes，並且不會嘗試編碼。

來源

2017-10-15 10:08:37 snakecharmerb

非常好。但是創建pdf有點慢。我想要更快。我怎樣才能做到這一點？ –

如果我使用UTF-8，它正在工作。但進程緩慢。 output.write（result） output.flush（） output = open（output.name）作爲輸出的響應['Content-Transfer-Encoding'] ='UTF-8' with tempfile.NamedTemporaryFile（delete = True），'rb'） response.write（output.read（）） –

如何更快地做到這一點是一個不同的問題 - 你需要問一個新的問題，而不是這個問題。 – snakecharmerb

UnicodeDecodeError：Django使用weasyprint生成PDF

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