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AGPL-3.0

Nging2

Nging's logo

注意:这是Nging2.0.0源代码,旧版1.x已经转移到 v1分支

Nging2相较于Nging1.x进行了相当大的改进,包括增加了几个重量级的新功能、提高了稳定性、降低了CPU占用、修复了界面细节上的bug、作为通用后台基础框架这个定位来进行的项目结构优化等等,欢迎使用最新版本。

注意:目前只支持安装到MySQL的Nging1.x无缝升级,暂不支持SQLite安装方式的升级(推荐安装到MySQL)。

升级步骤:
0. 备份数据库和旧版可执行文件;
1. 停止旧版本程序的运行;
2. 将新版本可执行文件复制到旧版文件目录里;
3. 启动新版本程序;
4. 登录后台检查各项功能是否正常;
5. 升级完毕

Nging是一个网站服务程序,可以代替Nginx或Apache来搭建Web开发测试环境,并附带了实用的周边工具,例如:计划任务、MySQL管理、Redis管理、FTP管理、SSH管理、服务器管理等。

本软件项目不仅仅实现了一些网站服务工具,本身还是一个具有很好扩展性的通用网站后台管理系统,通过本项目,您可以很轻松的构建一个全新的网站项目,省去从头构建项目的麻烦,减少重复性劳动。

当您基于本项目来构建新软件的时候,您可以根据需要来决定是否使用本系统的网站服务工具,这取决于您是否在main.go中导入包:

import (
	_ "github.com/admpub/nging/application/initialize/manager"
)

下载

下载2.0.0可执行文件

0、基本功能

一. 系统设置

目前,在“系统设置”中提供了以下设置组:

  1. 系统: 目前提供了API密钥和调试模式的开关
  2. SMTP: 配置用于发送邮件的SMTP服务器的相关设置
  3. 日志: 在这里可以设置如何保存和输出本系统所生成的日志

二. 用户管理

提供对后台用户的修改、添加和删除等操作。可以为后台用户分配相应的角色,从而对其进行权限控制

三. 角色管理

一个角色就是一个权限集合。在本系统中我们将权限分为了操作权限和指令权限。

  1. 操作权限:基于网址操作来进行权限判断
  2. 指令权限:用于指定该角色可以执行的指令(这里的指令是指系统命令)

四. 邀请码

邀请码用来邀请其他人来注册成为本系统的后台用户。您可以指定受邀人注册后所拥有的角色,从而限制其操作权限。

五. 验证码

在这里可以查看短信验证码和邮箱验证码的发送记录以及使用时间

六. 指令集

为了对系统命令的执行进行权限控制,可以定义某个系统命令为指令

七. 修改个人资料

可以在此修改自己的头像、邮箱、手机号、密码等信息

八. 使用两步验证

如果想要提高账号的安全性,请启用两步验证。本系统已经实现了对两步验证的完整支持。

Ⅰ、特色功能

一. Web服务

Web服务采用caddy作为内核。
caddy 是类似于nginx或apache的网站服务软件。caddy的配置文件比nginx更加简洁易用。 Nging采用了图形化界面来配置caddy,这使得对caddy的配置变得更加的容易。

设置网站服务的一般流程为:添加分组 - 添加网站 - 启动服务

1. 创建分组

首先,我们来添加一个分组。点击左边竖向导航栏上的网站管理展开子菜单,点击添加分组打开创建界面,在表单录入框组名称中输入名称后提交

2. 添加网站

然后,我们来添加一个网站。点击左边竖向导航栏上的网站管理展开子菜单,点击添加网站打开创建界面,这里向我们展示了创建网站服务所要配置的一些录入框,我们现在分别来说明各个录入框的作用:

  • 分组:如果网站特别多,需要按组进行归类,您可以在这里选择相应分组,这里我们选择第一步添加的分组

  • 监听地址:可以是网址、域名或IP。如果不提供端口则默认为2005,如果不提供协议(比如https://)则默认为http,如果不提供IP和域名则默认为0.0.0.0,如果只想允许本地访问请设置为localhost或127.0.0.1。
    域名支持通配符“*”(例如*.admpub.com)和环境变量(环境变量用花括号括起来,例如localhost:{$PORT})。
    例子: https://admpub.com:433 admpub.com:80 :8080 127.0.0.1:9999
    监听地址如有多个,用空格隔开。

  • 网站位置:网站文件夹在服务器上的绝对路径

  • 网站名称:网站的名字

  • 日志文件:输入保存访问日志文件的路径

  • 默认首页:在访问某个目录的时候,默认的首页文件。如有多个,用空格隔开。如不填写,默认为:index.html index.htm index.txt default.html default.htm default.txt

  • 响应Header:可以对网址中的某个起始路径的访问设置响应头参数,支持添加、删除和修改Header

    删除Header:在Header名称前使用减号(-)并将其值留空

  • HTTPS:支持手动和自动设置SSL证书。
    在手动模式下,需要分别填写证书和私钥文件位置;在自动模式下必须填写电子邮箱地址以便自动获取Let's encrypt 证书

  • GZIP:压缩数据,用于减少页面或静态文件的网络传输尺寸,可以通过指定扩展名的方式来对特定文件进行压缩

  • FastCGI:FastCGI代理用于将请求转发到FastCGI服务。尽管此指令最常见的用途是为PHP站点提供服务,但默认情况下它是通用的。支持设置多个不同的请求路径。

  • Proxy:反向代理功能用于将接收到的请求转发到指定的后台。通过设置多个后台地址我们能实现服务器的负载均衡。

  • 文件服务:用于提供文件的直接访问

  • IP过滤:通过设置过滤规则来禁止某些IP或国家来访问我们的网站

  • 网址重写:将请求的网址重写为其它值。常用于资源重定向、伪静态等场景

  • 备注:记录当前网站的一些附加说明

  • 网站状态:如果是启用状态则表示该网站能够上线

  • 是否重启:修改配置后,必须重启Web服务后才会生效

3. 启动服务

Web服务是默认启动的。

可以在网站列表页面点击重新应用配置来重新生成Caddy配置文件和重启服务。

当然,你也可以在左边的导航菜单中点击服务器链接然后再点击展开的子菜单服务管理,在打开的页面中点击Web服务的控制按钮来进行单纯的重启和关闭

二. 服务器

  1. 服务器信息

    展示服务器的操作系统、CPU、磁盘、内存、网络等信息。

    在这个页面中,使用了进度条和百分比来直观的展示数据和资源的占用量。

  2. 网络端口

    列出占用网络端口的进程,并且支持关闭进程

  3. 执行命令

    执行简单的控制台命令。

    用聊天对话框的方式来与机器进行简单的交互。

  4. 服务管理

    控制Web和FTP服务的启动和关闭

  5. 进程值守

    进程保活,即当执行的程序被异常关闭后自动重新启动此程序

    1. 添加配置

      在左边的导航菜单中点击服务器链接然后再点击展开的子菜单进程值守打开列表页,点击列表右上角的添加配置按钮,我们来添加一个配置,在配置表单中我们可以录入以下信息:

      • 状态:指定是否启用当前配置。如果启用则会自动开始值守
      • 名称:描述一下要值守的这个进程的名字
      • 命令:进程的启动命令
      • 环境变量:如果启动的程序需要一些特定的环境变量,您可以在这里进行设置。输入的格式为“环境变量的名称=环境变量的值”,比如“NAME=Nging”。如有多个,一行一个
      • 命令参数:其实在命令输入框中已经可以带参数了,但是如果参数比较多,则可以在这里添加,格式为-c=value,如有多个则一行一个
      • 工作目录:有的时候我们需要切换到某个目录下之后再执行程序,对于这种情况在这里输入这个目录的路径即可
      • 信息日志文件:值守的信息日志保存位置。如果不填,则输出到控制台
      • 错误日志文件:错误日志保存位置。如果不填,则输出到控制台
      • 重试次数:连续重试的次数。如果连续启动程序都失败了并且达到重试次数的限制,则退出值守
      • 启动延时:程序异常退出后,等待多长时间后再启动。格式为数字和字母的组合,例如:1y、2m、3d、4h、5i、6s 分别表示 1年、2个月、3天、4小时、5分钟、6秒
      • 心跳检测间隔:也就是多久检测一次程序运行状态。默认1m,即1分钟。格式同启动延时
      • 说明:该配置的附加说明
      • 调试模式:如果开启,则会在控制台输出调试信息
    2. 启动和关闭值守

      在列表页点击“启用状态”列中的复选框可以控制值守程序的开和关

三. FTP账号

  1. 添加账号分组

    对于有大量FTP账号的情况,可以通过建立分组来进行归类

  2. 添加FTP账号

    要使用Nging提供的FTP功能,必须首先要创建一个FTP账号。

    FTP客户端使用这里创建的账号来登录。

  3. 开关FTP服务

    在左边的导航菜单中点击服务器链接然后再点击展开的子菜单服务管理,在打开的页面中点击FTP服务的控制按钮来进行重启和关闭

四. 数据采集

数据采集模块提供了强大的采集功能,它包含了以下特色:

  • 灵活便捷的配置表单
  • 支持无限级页面
  • 支持多种页面格式(html,json,text)
  • 支持多类型采集规则(regexp,regexp2,goquery)
  • 丰富的过滤器和验证器
  • 支持多种浏览器引擎(chromedp,webdriver等)
  • 三种去重验证机制
  • 支持代理
  • 支持自动导出采集数据到不同的数据源(WebAPI,DSN)
  • 支持定时采集
  1. 添加采集规则

    在左边的导航菜单中点击数据采集链接然后再点击展开的子菜单新建规则,我们来添加一个新规则,在配置表单中我们可以录入以下信息:

    • 规则名称:首先您得为规则取一个名字

    • 分组:为当前规则选择一个分组

    • 说明:规则附加说明

    • 判断重复:选择一个判断重复的方式,这样可以避免重复采集相同的数据

    • 入口页面网址:在这里,您可以指定多个入口页面网址,每一个网址单独放在一行,支持使用Go语言的模板语法循环输出网址,此外,每一个网址中都支持使用数字范围标签,在数字范围标签中,连续的范围我们使用-来指定,不连续的范围使用,来罗列,同时支持指定步进值,且步进值与范围值之间用:分隔,默认步进值为1,例如:{(1-9,11,13-19:2)}

      例如:http://www.admpub.com/{(1-2)}.html 会生成网址:  
      http://www.admpub.com/1.html  
      http://www.admpub.com/2.html  
    • 最大超时:请求页面时的最大等待时长(秒)

    • 间歇时间:每个页面的随机等待的秒数范围

    • 代理地址:例如:http://admpub:123456@123.123.123.123:8080。支持格式protocol://user:password@ip:port

      • protocol - 支持http、https、socks5
      • user - 用户名(选填)
      • password - 密码(选填)
      • ip - IP地址
      • port - 端口
    • 页面格式:目标页面的内容格式,支持的有HTML/JSON/Text

    • 浏览引擎:目前支持standard/chromedp/webdriver这三种,其中standard为普通方式,速度最快,默认为standard。chromedp和webdriver为调用chrome浏览器,速度相对较慢

    • 页面类型:可以选择“列表页”和“内容页”选项,请根据所采集页面的实际类型来选择

    • 页面字符集:比如gbkutf-8。此项为选填,不填写的情况下会根据网页内容自动判断

    • 区域规则:指定所要采集页面上的某个区域的匹配规则。这里支持两种类型的规则:

      1. 选择器规则:即类似于jQuery匹配页面元素的规则,比如:div.container > h1
      2. 正则匹配规则:需要在规则前添加前缀regexp:regexp2:。其中regexp:为Go语言原生正则表达式规则;regexp2:为兼容 Perl5 和 .NET 的正则表达式规则(相关文档:https://github.com/admpub/regexp2
    • 规则:此处指定以下规则

      1. 数据采集规则:所要采集的数据匹配规则,如果指定了区域规则则在该区域内进行查找
      2. 数据保存变量名:指定数据保存到哪个变量里
      3. 数据过滤器和验证器:多个过滤器或验证器之间用管道符“|”分隔,以下划线“_”开头的为验证器(不符合验证器规则的数据会被跳过)

    然后可以点击“添加下一级页面”链接来对添加第二级页面的规则。页面的层级数量没有限制。

  2. 测试采集规则

点击“测试”按钮可以进行采集测试,为了快速获取测试结果,每一级页面只采集一条

  1. 执行采集

点击“采集”按钮进行手动采集

  1. 将采集加入计划任务

也可以将采集任务加入到计划任务中,进行自动定时采集

  1. 添加导出规则

    定义采集数据的导出方式。如果希望在采集的时候自动将采集到的数据导入其它系统,请在这里添加导出规则。 目前支持两种导出方式:

    1、导入到数据库; 2、提交到API接口(将JSON数据POST提交到API接口)

五. 计划任务

crontab的完美替代,并采用了图形化配置界面,支持记录日志、发送错误报告邮件等

六. 离线下载

这里的离线下载支持并行下载。
对于需要很长时间才能下载完成的大文件,我们只需要建立一个离线下载任务并且启动,然后就可以关闭浏览器去做其它的事情了,Nging会自动在后台帮您下载。

七. 数据库管理

  1. 管理MySQL
  2. 管理Redis
  3. MySQL表结构比较/同步

八. FRP内网穿透

当你想要将局域网内的电脑暴露到外网,以便于外网的用户也能访问到您的网站服务时,这时候就需要用到内网穿透。

内网穿透支持服务端模式和客户端模式,全图形化的配置界面让配置变得非常容易。

要成功使用内网穿透功能,必须在局域网电脑上启动客户端模式,在提供外网的服务器或VPS上启动服务端模式。

九. SSH管理

SSH管理功能实现了SSH的Web客户端管理功能,您可以在Nging网页上进行SSH命令行交互操作,也可以通过Nging以SFTP方式来进行文件的上传、下载、删除和编辑

Ⅱ、先睹为快

安装:

安装

登录:

登录

系统信息:

系统信息

在线编辑文件:

在线编辑文件

添加计划任务:

添加计划任务

MySQL数据库管理:

MySQL数据库管理

Ⅲ、开发环境下的启动方式

  • 第一步: 安装GO环境(必须1.12.1版以上),配置GOPATH、GOROOT环境变量,并将%GOROOT%/bin%GOPATH%/bin加入到PATH环境变量中
  • 第二步: 执行命令go get github.com/admpub/nging
  • 第三步: 进入%GOPATH%/src/github.com/admpub/nging/目录中启动run_first_time.bat(linux系统启动run_first_time.sh)
  • 第四步: 打开浏览器,访问网址http://localhost:8080/setup,在页面中配置数据库账号和管理员账号信息进行安装
  • 第五步: 安装成功后会自动跳转到登录页面,使用安装时设置的管理员账号进行登录

Ⅳ、临时文件

规定:./public/upload中所有名称为”0“的子文件夹内保存的都是临时文件,可以定时清理

临时文件的产生场景举例:

我们要发布一篇新文章,在保存文章之前,会上传一些图片,此时这些图片是无主图片,会被保存到名称为”0“的临时文件夹中,同时我们根据上传接口返回的文件路径把它们记录到文章发布表单的字段中,当我们提交文章将其保存到数据库的时候,我们就要根据这些字段中保存的文件路径,将它们从0号文件夹中转移到正式文件夹中(我们使用当前文章的ID作为正式文件夹名)
# 删除临时文件。
rm -rf ./comment/0/*
rm -rf ./customer-avatar/0/*
rm -rf ./user-avatar/0/*
rm -rf ./pay-product/0/*
rm -rf ./product-version/0/*
rm -rf ./siteAnnouncement/0/*
rm -rf ./news/0/*

请注意,本系统的源代码基于AGPL协议发布,不管您使用本系统的完整代码还是部分代码,都请遵循AGPL协议。

如果需要更宽松的商业授权协议,请联系我购买授权。

GNU AFFERO GENERAL PUBLIC LICENSE Version 3, 19 November 2007 Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/> Everyone is permitted to copy and distribute verbatim copies of this license document, but changing it is not allowed. Preamble The GNU Affero General Public License is a free, copyleft license for software and other kinds of works, specifically designed to ensure cooperation with the community in the case of network server software. The licenses for most software and other practical works are designed to take away your freedom to share and change the works. By contrast, our General Public Licenses are intended to guarantee your freedom to share and change all versions of a program--to make sure it remains free software for all its users. When we speak of free software, we are referring to freedom, not price. Our General Public Licenses are designed to make sure that you have the freedom to distribute copies of free software (and charge for them if you wish), that you receive source code or can get it if you want it, that you can change the software or use pieces of it in new free programs, and that you know you can do these things. Developers that use our General Public Licenses protect your rights with two steps: (1) assert copyright on the software, and (2) offer you this License which gives you legal permission to copy, distribute and/or modify the software. A secondary benefit of defending all users' freedom is that improvements made in alternate versions of the program, if they receive widespread use, become available for other developers to incorporate. Many developers of free software are heartened and encouraged by the resulting cooperation. However, in the case of software used on network servers, this result may fail to come about. The GNU General Public License permits making a modified version and letting the public access it on a server without ever releasing its source code to the public. The GNU Affero General Public License is designed specifically to ensure that, in such cases, the modified source code becomes available to the community. It requires the operator of a network server to provide the source code of the modified version running there to the users of that server. Therefore, public use of a modified version, on a publicly accessible server, gives the public access to the source code of the modified version. An older license, called the Affero General Public License and published by Affero, was designed to accomplish similar goals. This is a different license, not a version of the Affero GPL, but Affero has released a new version of the Affero GPL which permits relicensing under this license. The precise terms and conditions for copying, distribution and modification follow. TERMS AND CONDITIONS 0. Definitions. "This License" refers to version 3 of the GNU Affero General Public License. "Copyright" also means copyright-like laws that apply to other kinds of works, such as semiconductor masks. "The Program" refers to any copyrightable work licensed under this License. Each licensee is addressed as "you". "Licensees" and "recipients" may be individuals or organizations. To "modify" a work means to copy from or adapt all or part of the work in a fashion requiring copyright permission, other than the making of an exact copy. The resulting work is called a "modified version" of the earlier work or a work "based on" the earlier work. A "covered work" means either the unmodified Program or a work based on the Program. To "propagate" a work means to do anything with it that, without permission, would make you directly or secondarily liable for infringement under applicable copyright law, except executing it on a computer or modifying a private copy. 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This License acknowledges your rights of fair use or other equivalent, as provided by copyright law. You may make, run and propagate covered works that you do not convey, without conditions so long as your license otherwise remains in force. You may convey covered works to others for the sole purpose of having them make modifications exclusively for you, or provide you with facilities for running those works, provided that you comply with the terms of this License in conveying all material for which you do not control copyright. Those thus making or running the covered works for you must do so exclusively on your behalf, under your direction and control, on terms that prohibit them from making any copies of your copyrighted material outside their relationship with you. Conveying under any other circumstances is permitted solely under the conditions stated below. Sublicensing is not allowed; section 10 makes it unnecessary. 3. Protecting Users' Legal Rights From Anti-Circumvention Law. 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You may convey a work based on the Program, or the modifications to produce it from the Program, in the form of source code under the terms of section 4, provided that you also meet all of these conditions: a) The work must carry prominent notices stating that you modified it, and giving a relevant date. b) The work must carry prominent notices stating that it is released under this License and any conditions added under section 7. This requirement modifies the requirement in section 4 to "keep intact all notices". c) You must license the entire work, as a whole, under this License to anyone who comes into possession of a copy. This License will therefore apply, along with any applicable section 7 additional terms, to the whole of the work, and all its parts, regardless of how they are packaged. 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You may convey a covered work in object code form under the terms of sections 4 and 5, provided that you also convey the machine-readable Corresponding Source under the terms of this License, in one of these ways: a) Convey the object code in, or embodied in, a physical product (including a physical distribution medium), accompanied by the Corresponding Source fixed on a durable physical medium customarily used for software interchange. b) Convey the object code in, or embodied in, a physical product (including a physical distribution medium), accompanied by a written offer, valid for at least three years and valid for as long as you offer spare parts or customer support for that product model, to give anyone who possesses the object code either (1) a copy of the Corresponding Source for all the software in the product that is covered by this License, on a durable physical medium customarily used for software interchange, for a price no more than your reasonable cost of physically performing this conveying of source, or (2) access to copy the Corresponding Source from a network server at no charge. c) Convey individual copies of the object code with a copy of the written offer to provide the Corresponding Source. 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If additional permissions apply only to part of the Program, that part may be used separately under those permissions, but the entire Program remains governed by this License without regard to the additional permissions. When you convey a copy of a covered work, you may at your option remove any additional permissions from that copy, or from any part of it. (Additional permissions may be written to require their own removal in certain cases when you modify the work.) You may place additional permissions on material, added by you to a covered work, for which you have or can give appropriate copyright permission. 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Termination. You may not propagate or modify a covered work except as expressly provided under this License. Any attempt otherwise to propagate or modify it is void, and will automatically terminate your rights under this License (including any patent licenses granted under the third paragraph of section 11). However, if you cease all violation of this License, then your license from a particular copyright holder is reinstated (a) provisionally, unless and until the copyright holder explicitly and finally terminates your license, and (b) permanently, if the copyright holder fails to notify you of the violation by some reasonable means prior to 60 days after the cessation. Moreover, your license from a particular copyright holder is reinstated permanently if the copyright holder notifies you of the violation by some reasonable means, this is the first time you have received notice of violation of this License (for any work) from that copyright holder, and you cure the violation prior to 30 days after your receipt of the notice. Termination of your rights under this section does not terminate the licenses of parties who have received copies or rights from you under this License. If your rights have been terminated and not permanently reinstated, you do not qualify to receive new licenses for the same material under section 10. 9. Acceptance Not Required for Having Copies. You are not required to accept this License in order to receive or run a copy of the Program. Ancillary propagation of a covered work occurring solely as a consequence of using peer-to-peer transmission to receive a copy likewise does not require acceptance. However, nothing other than this License grants you permission to propagate or modify any covered work. These actions infringe copyright if you do not accept this License. Therefore, by modifying or propagating a covered work, you indicate your acceptance of this License to do so. 10. Automatic Licensing of Downstream Recipients. Each time you convey a covered work, the recipient automatically receives a license from the original licensors, to run, modify and propagate that work, subject to this License. You are not responsible for enforcing compliance by third parties with this License. An "entity transaction" is a transaction transferring control of an organization, or substantially all assets of one, or subdividing an organization, or merging organizations. If propagation of a covered work results from an entity transaction, each party to that transaction who receives a copy of the work also receives whatever licenses to the work the party's predecessor in interest had or could give under the previous paragraph, plus a right to possession of the Corresponding Source of the work from the predecessor in interest, if the predecessor has it or can get it with reasonable efforts. You may not impose any further restrictions on the exercise of the rights granted or affirmed under this License. For example, you may not impose a license fee, royalty, or other charge for exercise of rights granted under this License, and you may not initiate litigation (including a cross-claim or counterclaim in a lawsuit) alleging that any patent claim is infringed by making, using, selling, offering for sale, or importing the Program or any portion of it. 11. Patents. A "contributor" is a copyright holder who authorizes use under this License of the Program or a work on which the Program is based. The work thus licensed is called the contributor's "contributor version". A contributor's "essential patent claims" are all patent claims owned or controlled by the contributor, whether already acquired or hereafter acquired, that would be infringed by some manner, permitted by this License, of making, using, or selling its contributor version, but do not include claims that would be infringed only as a consequence of further modification of the contributor version. For purposes of this definition, "control" includes the right to grant patent sublicenses in a manner consistent with the requirements of this License. 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You may not convey a covered work if you are a party to an arrangement with a third party that is in the business of distributing software, under which you make payment to the third party based on the extent of your activity of conveying the work, and under which the third party grants, to any of the parties who would receive the covered work from you, a discriminatory patent license (a) in connection with copies of the covered work conveyed by you (or copies made from those copies), or (b) primarily for and in connection with specific products or compilations that contain the covered work, unless you entered into that arrangement, or that patent license was granted, prior to 28 March 2007. Nothing in this License shall be construed as excluding or limiting any implied license or other defenses to infringement that may otherwise be available to you under applicable patent law. 12. No Surrender of Others' Freedom. If conditions are imposed on you (whether by court order, agreement or otherwise) that contradict the conditions of this License, they do not excuse you from the conditions of this License. If you cannot convey a covered work so as to satisfy simultaneously your obligations under this License and any other pertinent obligations, then as a consequence you may not convey it at all. For example, if you agree to terms that obligate you to collect a royalty for further conveying from those to whom you convey the Program, the only way you could satisfy both those terms and this License would be to refrain entirely from conveying the Program. 13. Remote Network Interaction; Use with the GNU General Public License. Notwithstanding any other provision of this License, if you modify the Program, your modified version must prominently offer all users interacting with it remotely through a computer network (if your version supports such interaction) an opportunity to receive the Corresponding Source of your version by providing access to the Corresponding Source from a network server at no charge, through some standard or customary means of facilitating copying of software. This Corresponding Source shall include the Corresponding Source for any work covered by version 3 of the GNU General Public License that is incorporated pursuant to the following paragraph. Notwithstanding any other provision of this License, you have permission to link or combine any covered work with a work licensed under version 3 of the GNU General Public License into a single combined work, and to convey the resulting work. The terms of this License will continue to apply to the part which is the covered work, but the work with which it is combined will remain governed by version 3 of the GNU General Public License. 14. Revised Versions of this License. The Free Software Foundation may publish revised and/or new versions of the GNU Affero General Public License from time to time. Such new versions will be similar in spirit to the present version, but may differ in detail to address new problems or concerns. Each version is given a distinguishing version number. If the Program specifies that a certain numbered version of the GNU Affero General Public License "or any later version" applies to it, you have the option of following the terms and conditions either of that numbered version or of any later version published by the Free Software Foundation. If the Program does not specify a version number of the GNU Affero General Public License, you may choose any version ever published by the Free Software Foundation. If the Program specifies that a proxy can decide which future versions of the GNU Affero General Public License can be used, that proxy's public statement of acceptance of a version permanently authorizes you to choose that version for the Program. Later license versions may give you additional or different permissions. However, no additional obligations are imposed on any author or copyright holder as a result of your choosing to follow a later version. 15. Disclaimer of Warranty. THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION. 16. Limitation of Liability. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. 17. Interpretation of Sections 15 and 16. If the disclaimer of warranty and limitation of liability provided above cannot be given local legal effect according to their terms, reviewing courts shall apply local law that most closely approximates an absolute waiver of all civil liability in connection with the Program, unless a warranty or assumption of liability accompanies a copy of the Program in return for a fee. END OF TERMS AND CONDITIONS How to Apply These Terms to Your New Programs If you develop a new program, and you want it to be of the greatest possible use to the public, the best way to achieve this is to make it free software which everyone can redistribute and change under these terms. To do so, attach the following notices to the program. It is safest to attach them to the start of each source file to most effectively state the exclusion of warranty; and each file should have at least the "copyright" line and a pointer to where the full notice is found. Nging is a toolbox for webmasters Copyright (C) 2018-present Wenhui Shen <swh@admpub.com> This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for more details. You should have received a copy of the GNU Affero General Public License along with this program. If not, see <https://www.gnu.org/licenses/>. Also add information on how to contact you by electronic and paper mail. If your software can interact with users remotely through a computer network, you should also make sure that it provides a way for users to get its source. For example, if your program is a web application, its interface could display a "Source" link that leads users to an archive of the code. There are many ways you could offer source, and different solutions will be better for different programs; see section 13 for the specific requirements. You should also get your employer (if you work as a programmer) or school, if any, to sign a "copyright disclaimer" for the program, if necessary. For more information on this, and how to apply and follow the GNU AGPL, see <https://www.gnu.org/licenses/>.

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