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一键下载小说（二）：如何在Django中部署

news 来源：原创 2024/5/6 16:07:32

一键下载小说（二）：如何在Django中部署

分析
流程
实现
- Myappname / views.py
- Myappname / templates / novelCc.html
部署
- Myprojectname / urls.py
- Myappname / urls.py
运行
- 自动下载
- 窗口列表
笔记

分析

在Django服务器中实施部署长时段的在线任务有两个关键的问题，如参数传递和超时问题。参数传递的HTTP/HTTPS传输方式一般有两种：GET和POST方法。GET方法使用明文将参数拼接在URL地址后面传输，而POST则将表单参数加密后再发送，对于用户是不可见的。本文中的案例中，在本地搭建小说下载器，使用GET方法。至于超时问题，通常的惯例做法是在客户端使用Javascript脚本进行跳转或表单提交。需要的参数通过客户端Form表单提交和服务端渲染Django模板返回的组合方式进行交换。

流程

实现

Myappname / views.py

def novel_cc(request):
    counter, book, referer, cookies = 0, None, None, None
    if request.method == 'GET':
        url = request.GET.get('url')
        if url is not None and httpkit.valid_https(url):
            book = request.GET.get('name', 'unk_' + hashio.md5(url))
            counter = int(request.GET.get('index', 1))
            referer = request.GET.get('from', None)
            cookies = request.GET.get('token', None)
            print(url, book)
            text, next_page, referer, cookies = cdxsw_cc_1.test(start_url=url, index=counter, referer=referer,
                                                                cookies=cookies,
                                                                book_name=book)
            print(counter, referer, cookies)
        else:
            next_page, referer, cookies = None, None, None
    else:
        next_page, referer, cookies = None, None, None
    counter += 1
    context = {'index': counter, 'book': book, 'next': next_page, 'from': referer, 'token': cookies}
    return render(request, 'Myappname/novelCc.html', context)

Myappname / templates / novelCc.html

<!DOCTYPE html>
<html lang="zh">
<head>
    <meta charset="UTF-8">
    {% if index %}
    <title>Page {{index}}</title>
    {% else %}
    <title>Novel</title>
    {% endif %}
</head>
<body>
<form id="book-form" action="/Myprojectname/novelWidget/" method="get">
    {% if index %}
    <label for="counter">Page:</label>
    <input id="counter" name="index" value="{{index}}" hidden>
    {% else %}
    <label for="counter">Page:</label>
    <input id="counter" name="index" value="1" hidden>
    {% endif %}
    {%csrf_token%}
    <label for="input2">书名: </label>
    {% if book %}
    <input type="text" id="input2" name="name" value="{{book}}">
    {% else %}
    <input type="text" id="input2" name="name">
    {% endif %}
    {% if next %}
    <script type="text/javascript">
        setTimeout(function(){var book_form = document.getElementById("book-form"); book_form.submit();}, 3000);
    </script>
    <label for="input1">下一页: </label>
    <input type="text" id="input1" name="url" value="{{ next }}">
    {% else %}
    <label for="input1">输入URL: </label>
    <input type="text" id="input1" name="url">
    {% endif %}
    {% if from %}
    <label for="input3">上一页: </label>
    <input id="input3" name="from" value="{{from}}">
    {% endif %}
    {% if token %}
        {% if not next %}
            <script type="text/javascript">alert('End!');</script>
        {% endif %}
    <input name=“token" value="{{token}}">
    {% endif %}
    <input type="submit" value="搜索" class="sub">
</form>
</body>
</html>

部署

Myprojectname / urls.py

"""Myprojectname URL Configuration

The `urlpatterns` list routes URLs to views. For more information please see:
    https://docs.djangoproject.com/en/3.2/topics/http/urls/
Examples:
Function views
    1. Add an import:  from my_app import views
    2. Add a URL to urlpatterns:  path('', views.home, name='home')
Class-based views
    1. Add an import:  from other_app.views import Home
    2. Add a URL to urlpatterns:  path('', Home.as_view(), name='home')
Including another URLconf
    1. Import the include() function: from django.urls import include, path
    2. Add a URL to urlpatterns:  path('blog/', include('blog.urls'))
"""
from django.contrib import admin
from django.urls import include, path


urlpatterns = [
    path('Myprojectname/', include('Myappname.urls')),
    path('admin/', admin.site.urls),
]

Myappname / urls.py

"""Myappname URL Configuration

The `urlpatterns` list routes URLs to views. For more information please see:
    https://docs.djangoproject.com/en/3.2/topics/http/urls/
Examples:
Function views
    1. Add an import:  from my_app import views
    2. Add a URL to urlpatterns:  path('', views.home, name='home')
Class-based views
    1. Add an import:  from other_app.views import Home
    2. Add a URL to urlpatterns:  path('', Home.as_view(), name='home')
Including another URLconf
    1. Import the include() function: from django.urls import include, path
    2. Add a URL to urlpatterns:  path('blog/', include('blog.urls'))
"""
from django.urls import path
from . import views


app_name = 'Myappname'
urlpatterns = [
    path('novelWidget/', views.novel_cc, name='novelWidget'),
]