1.HttpRequest对象
HttpRequest对象包含当前请求URL的一些信息：
有关request的其它信息：
request.META 是一个Python字典，包含了所有本次HTTP请求的Header信息，这个字典中几个常见的键值有
| 键值 | 作用 |
|---|---|
| HTTP_REFERER | 进站前链接网页，如果有的话 |
| HTTP_USER_AGENT | 用户浏览器的user-agent字符串，如果有的话。 |
| REMOTE_ADDR | 客户端IP，如："12.345.67.89" 。(如果申请是经过代理服务器的话，那么它可能是以逗号分割的多个IP地址，如："12.345.67.89,23.456.78.90" 。) |
写一个view显示request.META中的所有数据
# 显示 request.META 的所有数据
def display_meta(req):
values = req.META.items()
values.sort()
html = []
for k, v in values:
html.append('<tr><td>%s</td><td>%s</td></tr>' % (k, v))
return HttpResponse('<table>%s</table>' % '\n'.join(html))2. 类字典对象
request.GET和request.POST是类字典对象，意思是他们的行为像Python里标准的字典对象，但在技术底层上他们不是标准字典对象。因为request.GET和request.POST拥有一些普通的字典对象所没有的方法。
在视图中使用Form对象
创建文件夹：
在forms.py中添加代码：
from django import forms
class ContactForm(forms.Form):
subject = forms.CharField(max_length=100, label='subject')
email = forms.EmailField(required=False, label='Your e-mail address')
message = forms.CharField(widget=forms.Textarea, label='message')
def clean_massage(self):
message = self.cleaned_data['message']
num_words = len(message.split())
if num_words < 4:
raise forms.ValidationError("Not enough words")
return message在view.py中添加
from django.http import HttpResponseRedirect
from django.shortcuts import render_to_response
from contact.forms import ContactForm
def contact_f(req):
if req.method == 'POST':
form = ContactForm(req.POST)
if form.is_valid():
# cd = form.cleaned_data
# print cd['subject']
# print cd['email']
# print cd['message']
return HttpResponseRedirect('/thanks/')
else:
form = ContactForm()
return render_to_response('contact_form.html', {'form': form})
def thanks(req):
return render_to_response('thanks.html')在urls.py中添加
from contact.view import contact_f, thanks
urlpatterns = patterns('',
url(r'^contact_f/$', contact_f),
url(r'^thanks/$', thanks),
）在templates中添加html文件
contact_form.py
<!DOCTYPE html>
<html>
<style type="text/css">
ul.errorlist{
margin: 0;
padding: 0;
}
.errorlist li{
background-color: red;
color: white;
display: block;
font-size: 10px;
margin: 0 0 3px;
padding: 4px 5px;
}
.field{
background-color: gray;
}
</style>
<head lang="en">
<meta charset="UTF-8">
<title>Contact us</title>
</head>
<body>
<h1>Contact us</h1>
{% if form.errors %}
<p style="color: red;">
Please correct the error{{ form.errors | pluralize }} below.
</p>
{% endif %}
<form action="" method="post">
<div class="field">
{{ form.subject.errors }}
<label for="id_subject">Subject:</label>
{{ form.subject }}
</div>
<div class="field">
{{ form.email.errors }}
<label for="id_email">Your e‐mail address:</label>
{{ form.email }}
</div>
<div class="field">
{{ form.message.errors }}
<label for="id_message">Message:</label>
{{ form.message }}
</div>
<input type="submit" value="Submit">
</form>
</body>
</html>thanks.py
<!DOCTYPE html> <html> <head lang="en"> <meta charset="UTF-8"> <title></title> </head> <body> <h1>Thanks!!!</h1> </body> </html>
笔记来自《Django中文教程》
