java iText 5.4.2 是开源的吗？
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Is iText 5.4.2 open source?
提问by ParagJ
I would like to know whether iText 5.4.2 is a open source. I know it is described here well:
我想知道 iText 5.4.2 是否是开源的。我知道这里描述得很好：
http://itextpdf.com/terms-of-use/index.php
http://itextpdf.com/terms-of-use/index.php
But I am confused as the page also says this:
但我很困惑，因为该页面还说：
Buying such a license is mandatory as soon as you develop commercial activities distributing the iText software inside your product or deploying it on a network without disclosing the source code of your own applications under the AGPL license. These activities include: offering paid services to customers as an ASP, serving PDFs on the fly in the cloud or in a web application, shipping iText with a closed source product.
一旦您开发了在您的产品中分发 iText 软件或将其部署在网络上的商业活动，而无需在 AGPL 许可下披露您自己的应用程序的源代码，就必须购买此类许可。这些活动包括：作为 ASP 向客户提供付费服务、在云端或 Web 应用程序中即时提供 PDF、使用封闭源代码产品发布 iText。
回答by ssindelar
AGPL stands for Affero GPL.
AGPL 代表Affero GPL。
It basicallysays, when you want to sell a software product that includes iText or use iText in any commercial webservice, than you need to buy a license.
它基本上是说，当您想销售包含 iText 的软件产品或在任何商业网络服务中使用 iText 时，您需要购买许可证。
If you do an open source (with an approriate license) or private project, than you are fine and don't need to buy a license.
如果您从事开源（具有适当的许可证）或私人项目，那么您就可以了，不需要购买许可证。
回答by tbodt
The short answer is, yes, iText is open source. The long answer is the next paragraph.
简短的回答是，是的，iText 是开源的。长答案是下一段。
The Affero GPL provides some restrictions, which they would be happy to remove, if you buy a license. For example, you must disclose your source code for apps based on iText, but if you do not want to do that, you can buy a commercial license, freeing you from the AGPL.
Affero GPL 提供了一些限制，如果您购买许可证，他们会很乐意删除这些限制。例如，您必须公开基于 iText 的应用程序的源代码，但如果您不想这样做，您可以购买商业许可证，从而将您从 AGPL 中解放出来。
回答by Lonzak
The last iText version released under a less restrictive license was iText 2.1.7 (java) and 4.1.6 (c#). It was both released under MPL / LGPL. Even though the authors removed it from the sourceforge page you are able to find it in many places in the web (e.g. maven central). Those versions are from 2009 and still do their job fine, if you need the latest pdf features however (newer versions of digital signatures, ...) or experience a bug you may have to use the latest version...
在限制较少的许可下发布的最后一个 iText 版本是 iText 2.1.7 (java) 和 4.1.6 (c#)。它都是在 MPL / LGPL 下发布的。即使作者从 sourceforge 页面中删除了它，您仍然可以在网络的许多地方（例如 maven central）找到它。这些版本来自 2009 年并且仍然可以正常工作，但是如果您需要最新的 pdf 功能（更新版本的数字签名，...）或遇到错误，您可能必须使用最新版本...
