Asa*_*hel 1 python django django-templates django-models weasyprint
我正在用Django开发应用程序。浏览选择链接时，我想生成pdf。所以我用weasyprint模块来转换我的pdf。我导入了weasyprint模块。但是，当我运行该应用程序时，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>??? ??????</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>??? ?????? ?????? ???, ??? ?????, ?????? ?????, MP-3, ????? ???????, ????? ?????, ?????? ????? ????????, ???????, ???????,?????,??????, ????, ??????? ??? ???????? ??????? ????????</p>
</div>
<div class="invoice_location">
<p>????????? ????? ???????, ????? ???, ??????? ?????, ??????????</p>
</div>
<div class="invoice_contact">
<p>01717-051200(???????) 01828-163858(?????)</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: ????? ????</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>??????? ????????? ??? ??? ?????? ?????? ??? ??? ?????? ?????????? ??</b>
</p>
<h5>??????? ??? ???? ????? ?? ??</h5>
</div>
</div>
</div>
</div>
</div>
</div>
</body>
当我浏览该网址时。我得到了这个错误。我正在努力解决此错误。但是我不能。
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
您正在以文本模式（'r'）阅读pdf文件
>>> 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
但您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HttpResponse.write被调用时，检查是否它的输入是str或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，可以确保输入为，bytes并且不会尝试编码。
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