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README
AGPL-3.0

Sym

下一代的社区系统,为未来而构建





English

💡 简介

Symphony([ˈs ɪmf əni],n.交响乐)是一个现代化的社区平台,因为它:

  • 实现了面向内容讨论的论坛
  • 实现了面向知识问答的社区
  • 包含了面向用户分享、交友、游戏的社交网络
  • 100% 开源

欢迎到 Sym 官方讨论区了解更多。同时也欢迎关注 B3log 开源社区微信公众号 B3log开源

b3logos.jpg

⚡ 动机

很多社区论坛系统:

  • 界面风格老式,没有跟上时代发展的步伐
  • 缺少创新、好玩的特性,缺少现代化的交互元素和用户体验
  • 缺乏考虑实际运营需求,管理功能过于单一
  • 细节不够精致、缺乏长期维护

🗃 案例

社区版:

商业版:

✨ 特性

内容编辑器
	Markdown(GFM)
	Emoji
	上传文件
		图片
		文件
		单独渲染 MP3
		单独渲染视频
	支持录音
	剪贴板处理
		粘贴内容处理为 Markdown
		粘贴图片自动重新上传
	@用户
	数学公式(LaTeX)、流程图支持
	快捷键支持
	工具栏
		表情
		粗体
		斜体
		引用
		无序列表
		有序列表
		链接
		上传
		预览
		全屏
	编辑模式
		传统的 Markdown 分屏编辑预览
		保留 Markdown 标记符的即时渲染
		类富文本编辑器的所见即所得
注册
	用户名
	Email
	邀请码(如果管理员启用)
	邀请链接
	验证码
	邮件验证
	新手向导
		上传头像
		关注标签
		关注用户
		帮助指引
登录
	账户(用户名/Email)
	密码
	忘记密码
		Email
		验证码
发帖
	帖子类型
		同城广播
		机要
		思绪
		问答
		普通帖子
	标题
	正文
		内容编辑器
		本地存储
	标签
		使用已有(选择、自动完成)或创建
		过滤
			黑白名单
			规范化
		默认“待分类”
	插入投票
		单选/多选
		结束时间
		是否公开投票人
	打赏区
		内容编辑器
		打赏积分
	匿名发布
		不可更新匿名状态
	发布后
		可更新
			历史版本
		可删除
	Sandbox 机制
回帖
	内容编辑器
	本地存储
	匿名发布
	是否仅楼主可见
	@参与者
	@单个用户
	回复(回复针对回帖,@针对用户)
	@V(小薇机器人)
	发布后
		可更新
			历史版本
		可删除
	自动关注帖子
活跃度
	发帖数
	回帖数
	参加活动数
	感谢帖子数
	感谢回帖数
	采纳回答数
	投票数
	打赏帖子数
	浏览数
积分
	积分规则
	充值
	提现
货币
	钱包地址管理(ETH)
	币种管理
浏览回帖
	浏览模式
		传统
		实时
	感谢
	采纳回答
	赞同
	反对
	举报
	折叠
		偏离主题
		已过时
	分享
	回帖高亮
		采纳的回答
		优质回帖
		Reddit 评论排序算法
	查看回复
	查看引用(原回帖)
	编辑自己的回帖
	查看历史
	引用统计
浏览帖子
	实时热度
	感谢
	赞同
	反对
	收藏
	关注
	举报
	置顶自己的帖子
	查看历史
	参与投票
	目录
	编辑自己的帖子
	发布时间/浏览数/回帖数/标签
	思绪播放/快速预览
	语音摘要播放
	分支主题
	上一篇/下一篇
	分享
		微信
		QQ
		微博
		Twitter
		分享链接(带用户标识)
	相关帖子
	缩略摘要
	图片代理
	爬虫统计
	引用统计
帖子列表
	领域
		相关标签
	最新
	优选
	同城
	搜索
	标签
		相关标签
		创建者
		贡献者
		关注/引用/回帖数
		所属领域
		关注
	排序
		默认(按发布时间降序)
		热议(按回帖数降序)
		好评(按评分降序)
		最近回帖(按最近回帖时间降序)
	首图
	实时热度
	最新回复
	回帖数
	是否查浏览过该帖(前端样式)
	创建时间
后台管理
	后台首页
		数据统计
			当前在线
			会员在线
			最高在线
			会员
			帖子
			领域
			标签
			回帖
		版本检查
	用户管理
		按用户名/邮件搜索
		添加新用户
		用户数据维护
			各字段数据
			用户状态
				正常
				未验证
				限制登录
				封禁
			高级更新
				用户名
				邮箱地址
			积分充值
			积分提现
			活动积分奖励
			违规积分扣除
			补偿初始化积分
	帖子管理
		按 id 搜索帖子
		重建所有帖子搜索索引
		添加新帖
		帖子数据维护
			各字段数据
			置顶/取消置顶
			重建搜索索引
			电报群推送
			锁定帖子
			删除帖子
	回帖管理
		回帖状态
			正常
			封禁
		内容数据
		删除回帖
	评论管理
		评论状态
		内容数据
		删除评论
	清风明月管理
		清风明月状态
		内容数据
		删除清风明月
	聊天室管理
		内容数据
		状态
	文件管理
	领域管理
		按名称搜索领域
		添加领域
		领域数据维护
			添加/移除相关标签
			名称
			URI
			描述
			图标
			是否用于导航
			状态
			CSS
			SEO
				title
				keywords
				description
			删除领域
	标签管理
		按名称搜索标签
		添加标签
		标签数据维护
			名称
			URI
			描述
			图标
			状态
			CSS
			SEO
				title
				keywords
				description
	保留词管理
		添加保留词
		保留词数据维护
			保留词内容
			删除保留词
	邀请码管理
		生成邀请码
		邀请码数据维护
			状态
				未使用
				已使用
				停用中
			备注
	广告管理
		首页展位
		首页顶部横幅展位
		侧边栏展位
		帖子外围展位
		帖子内嵌展位
		用户主页展位
		帖子列表展位
	角色管理
		内建角色
			管理员
			荣誉会员
			资深会员
			会员
			新手
			访客
		创建角色
		功能权限
	举报管理
		处理(奖励举报者积分)
		忽略
	审核管理
		发布/更新审核
			发帖审核
			回帖审核
			评论审核
		通过,可调整内容
		拒绝,可备注告知作者
		审核结果通知作者
	其他管理
		是否允许发布帖子
		是否允许进行回帖
		是否允许匿名浏览
		注册方式
			开放注册
			关闭注册
			邀请码注册
		帖子浏览计数是否排重
		语言
			按浏览器自动选择
			简体中文
			美式英语
		不显示列表的标签
	管理操作审计日志
		用户
		时间
		具体操作
		IP
		UA
浏览统计
	实时统计
		当前在线
		最高在线
		会员
		帖子
		领域
		标签
		回帖
		页面加载时间
	数据统计
		最近 30 天
		历史
		新回帖数
		新发贴数
		新用户数
消息通知
	消息数
	标记已读
	删除
	消息类别
		收到的回帖
		收到的回复
		收到的评论
		提及我的
			帖子内@
			回帖内@
			评论内@
			收藏
			关注
		我关注的
			关注的用户发帖
			关注的帖子
				贴主有更新
				帖子有人回
		积分
			感谢帖子
			感谢回帖
			采纳回答
			打赏帖子
			充值
			兑换
			扣除
			转账
			邀请注册
			帖子上优选
		同城
		系统
	Chrome 桌面提醒
活动
	领取今日签到奖励
	上证博彩

	贪吃蛇
	五子棋
	聊天室
个人主页
	用户统计数据
	帖子
	回帖
	匿贴
	匿回
	清风明月
	关注帖子
	积分
	关注标签
	收藏帖子
	关注者
	GitHub 仓库
	举报
	关注用户
	站点连接
API
	B3
		博客发布博文 -> 论坛发布帖子
		博客更新博文 -> 论坛更新帖子
		博客发布评论 -> 论坛发布回帖
		论坛发布回帖 -> 博客发布评论
	客户端 APP
排行榜
	签到排行
	综合排行
	链接排行
	GitHub 排行
		仓库
		用户
	活跃度排行
	帖子排行
		打赏区
	积分排行
		财富排行
		消费排行
侧边栏
	广告位
	随机小贴士
	近期热议
	推荐标签
		图标
		简介
		引用数
		回帖数
	最新标签
首页
	领域、问答、关注、同城、最新帖子入口
	搜索、发帖、通知、个人等入口
	领域导航列表
	随机标签列表
	首页顶部横幅广告展位
浏览权限
	是否允许可以匿名(非登录)浏览
		按 URI 路径配置
		帖子可以单独配置
	机要:需要在文中 @ 到的用户才可以浏览的帖子
	对搜索引擎爬虫友好
邮件
	周精华订阅推送
	邮件服务
		SendCloud
		阿里云
		本地 JavaMail
搜索
	第三方 Algolia
	自建 Elasticsearch
	快捷搜索
		帖子
			标题
			正文
		标签
			标题
			描述
		用户
			用户名
			简介
	帖子高级搜索
		作者
		发布时间
		等其他条件
清风明月
彩蛋
	鼠标 ❤ 特效
	异次元空间
	领取昨日活跃奖励
用户设置
	基本信息
		昵称
		自我标签
		URL
		个性签名
		个人主页背景图
		个人卡片背景图
		站点连接
			GitHub
			StackOverflow
			Dribbble
			Behance
			Twitter
			Facebook
			Instagram
			Medium
			LinkedIn
			Telegram
			微博
			知乎
			QQ
			微信
	头像
	账号
		第三方登录
			QQ
			GitHub
			微博
			微信(公众号/开放平台/小程序)
		绑定手机
		绑定邮箱
		更新密码
		更新用户名
		永久停用账号
	审核
		可查看提交的审核申请状态
	安全
		两步验证(Google 验证器)
		登录日志
	邀请
		邀请链接
		兑换邀请码
	积分
		转账
	B3 同步配置
	功能
		个性化
			是否回帖后自动关注帖子
			是否启用站外链接跳转页面
			是否启用键盘快捷键
			是否订阅邮件
			是否启用 Web 通知
			回帖浏览模式
			分页每页条目
			自定义首页跳转
		设置常用表情
	界面
		切换主题
			Classic
			知乎
		模式
			明亮
			暗黑
			随日出日落自动切换
		头像浏览模式
			原图
			静态图
		帖子列表布局
			紧凑
			概览
	隐私
		是否显示 UA 信息
		是否公开帖子列表
		是否公开关注用户列表
		是否公开收藏帖子列表
		是否参与财富排行
		是否参与消费排行
		是否参与贡献排行
		是否参与 GitHub 排行
		是否公开积分列表
		是否公开回帖列表
		是否公开关注标签列表
		是否公开粉丝列表
		是否公开在线状态
		是否公开清风明月
		是否允许搜索引擎索引
		位置
			城市
			是否公开
	数据
		发帖/回帖数统计
		数据导出
	国际化
		常用语言设置
		所在时区设置
	钱包
		以太坊地址管理
		转账记录
	帮助
		使用入门
		基础知识
		键盘快捷键
		Markdown 教程
内容反垃圾
	随意的测试内容
	最大公共子串重复内容
	接入微信小程序内容安全接口
文件
	文件元数据
		文件名
		大小
		日期
		关联引用
		URL
	用户文件列表、总数、总大小
评论
	发布、更新、删除评论
	@通知
	点赞
	感谢

Sym功能.png

🎨 界面

以下截图来自 Sym 商业版。

首页

index

列表

list.png

帖子

article.png

发帖

post.png

用户 - PC 端

pchome.png

多主题

theme1.png

🛠️ 安装

请参考 Sym 安装指南

🏘️ 社区

📄 授权

  • 社区版:使用 AGPLv3 开源,如果你选择使用社区版,则必须完全遵守 AGPLv3 的相关条款;公司使用必须购买商用授权
  • 商业版:提供完整源码以便二开,报价 ¥20000,详情请看这里
  • 云服务:提供开箱即用的云端服务,每年 ¥5000(暂时售罄)

关于商业版和社区版的对比请看这里,企业网站、经营性网站、以营利为目的或实现盈利的网站请购买商业版。

🙏 鸣谢

  • jQuery:前端 JavaScript 工具库
  • Vditor: 浏览器端的 Markdown 编辑器
  • Highlight.js:前端代码高亮库
  • pjax:pushState + AJAX = pjax
  • Sass:前端 CSS 处理工具
  • jsoup:Java HTML 解析器
  • flexmark:Java Markdown 处理库
  • Apache Commons:Java 工具库集
  • Jodd:Java 工具库集
  • Latke:以 JSON 为主的 Java Web 框架

安全方面特别感谢:

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. Propagation includes copying, distribution (with or without modification), making available to the public, and in some countries other activities as well. To "convey" a work means any kind of propagation that enables other parties to make or receive copies. Mere interaction with a user through a computer network, with no transfer of a copy, is not conveying. An interactive user interface displays "Appropriate Legal Notices" to the extent that it includes a convenient and prominently visible feature that (1) displays an appropriate copyright notice, and (2) tells the user that there is no warranty for the work (except to the extent that warranties are provided), that licensees may convey the work under this License, and how to view a copy of this License. If the interface presents a list of user commands or options, such as a menu, a prominent item in the list meets this criterion. 1. Source Code. The "source code" for a work means the preferred form of the work for making modifications to it. "Object code" means any non-source form of a work. A "Standard Interface" means an interface that either is an official standard defined by a recognized standards body, or, in the case of interfaces specified for a particular programming language, one that is widely used among developers working in that language. The "System Libraries" of an executable work include anything, other than the work as a whole, that (a) is included in the normal form of packaging a Major Component, but which is not part of that Major Component, and (b) serves only to enable use of the work with that Major Component, or to implement a Standard Interface for which an implementation is available to the public in source code form. A "Major Component", in this context, means a major essential component (kernel, window system, and so on) of the specific operating system (if any) on which the executable work runs, or a compiler used to produce the work, or an object code interpreter used to run it. The "Corresponding Source" for a work in object code form means all the source code needed to generate, install, and (for an executable work) run the object code and to modify the work, including scripts to control those activities. However, it does not include the work's System Libraries, or general-purpose tools or generally available free programs which are used unmodified in performing those activities but which are not part of the work. 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You may convey verbatim copies of the Program's source code as you receive it, in any medium, provided that you conspicuously and appropriately publish on each copy an appropriate copyright notice; keep intact all notices stating that this License and any non-permissive terms added in accord with section 7 apply to the code; keep intact all notices of the absence of any warranty; and give all recipients a copy of this License along with the Program. You may charge any price or no price for each copy that you convey, and you may offer support or warranty protection for a fee. 5. Conveying Modified Source Versions. 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. This License gives no permission to license the work in any other way, but it does not invalidate such permission if you have separately received it. d) If the work has interactive user interfaces, each must display Appropriate Legal Notices; however, if the Program has interactive interfaces that do not display Appropriate Legal Notices, your work need not make them do so. A compilation of a covered work with other separate and independent works, which are not by their nature extensions of the covered work, and which are not combined with it such as to form a larger program, in or on a volume of a storage or distribution medium, is called an "aggregate" if the compilation and its resulting copyright are not used to limit the access or legal rights of the compilation's users beyond what the individual works permit. Inclusion of a covered work in an aggregate does not cause this License to apply to the other parts of the aggregate. 6. Conveying Non-Source Forms. 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 you convey an object code work under this section in, or with, or specifically for use in, a User Product, and the conveying occurs as part of a transaction in which the right of possession and use of the User Product is transferred to the recipient in perpetuity or for a fixed term (regardless of how the transaction is characterized), the Corresponding Source conveyed under this section must be accompanied by the Installation Information. But this requirement does not apply if neither you nor any third party retains the ability to install modified object code on the User Product (for example, the work has been installed in ROM). The requirement to provide Installation Information does not include a requirement to continue to provide support service, warranty, or updates for a work that has been modified or installed by the recipient, or for the User Product in which it has been modified or installed. 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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. Notwithstanding any other provision of this License, for material you add to a covered work, you may (if authorized by the copyright holders of that material) supplement the terms of this License with terms: a) Disclaiming warranty or limiting liability differently from the terms of sections 15 and 16 of this License; or b) Requiring preservation of specified reasonable legal notices or author attributions in that material or in the Appropriate Legal Notices displayed by works containing it; or c) Prohibiting misrepresentation of the origin of that material, or requiring that modified versions of such material be marked in reasonable ways as different from the original version; or d) Limiting the use for publicity purposes of names of licensors or authors of the material; or e) Declining to grant rights under trademark law for use of some trade names, trademarks, or service marks; or f) Requiring indemnification of licensors and authors of that material by anyone who conveys the material (or modified versions of it) with contractual assumptions of liability to the recipient, for any liability that these contractual assumptions directly impose on those licensors and authors. All other non-permissive additional terms are considered "further restrictions" within the meaning of section 10. If the Program as you received it, or any part of it, contains a notice stating that it is governed by this License along with a term that is a further restriction, you may remove that term. If a license document contains a further restriction but permits relicensing or conveying under this License, you may add to a covered work material governed by the terms of that license document, provided that the further restriction does not survive such relicensing or conveying. If you add terms to a covered work in accord with this section, you must place, in the relevant source files, a statement of the additional terms that apply to those files, or a notice indicating where to find the applicable terms. Additional terms, permissive or non-permissive, may be stated in the form of a separately written license, or stated as exceptions; the above requirements apply either way. 8. 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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If you convey a covered work, knowingly relying on a patent license, and the Corresponding Source of the work is not available for anyone to copy, free of charge and under the terms of this License, through a publicly available network server or other readily accessible means, then you must either (1) cause the Corresponding Source to be so available, or (2) arrange to deprive yourself of the benefit of the patent license for this particular work, or (3) arrange, in a manner consistent with the requirements of this License, to extend the patent license to downstream recipients. "Knowingly relying" means you have actual knowledge that, but for the patent license, your conveying the covered work in a country, or your recipient's use of the covered work in a country, would infringe one or more identifiable patents in that country that you have reason to believe are valid. If, pursuant to or in connection with a single transaction or arrangement, you convey, or propagate by procuring conveyance of, a covered work, and grant a patent license to some of the parties receiving the covered work authorizing them to use, propagate, modify or convey a specific copy of the covered work, then the patent license you grant is automatically extended to all recipients of the covered work and works based on it. A patent license is "discriminatory" if it does not include within the scope of its coverage, prohibits the exercise of, or is conditioned on the non-exercise of one or more of the rights that are specifically granted under this License. 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. <one line to give the program's name and a brief idea of what it does.> Copyright (C) <year> <name of author> 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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