If there is any doubt in your mind of where it came from you should not use it. Just because the license isn't there doesn't mean there isn't one. Someone else could have stripped the license from the code and reposted it. That wouldn't give you carte-blanche to use it.
It is very possible that at a later date the original author who did Copyright (which he gets the copyright by default) could come after you.
In all reality it would all depend on his ability to enforce his copyright. This is what is happening will all these tech companies claiming their IP has been infringed on. The Linux, Google, Microsoft, Oracle debacles are all because of some similar problem to this.
If it isn't that complicated, just rewrite the code.
Where did you find it? A web-site (contact webmaster), a post (contact the author, or leave amessage in the forum)? Legacy code in your company?
You should try to follow the breadcrumbs and try to get to the author to clarify it. Document what you do to contact him, so at least you can prove you have not acted in bad faith in case someone complains.
If you have done that and nothing comes out, I would use it in my code without much of a hassle. If the author wanted it copyrighted, he should have attached a copyright notice to it.
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这不是法律建议
如果您对它的来源有任何疑问，则不应使用它。仅仅因为没有许可证并不意味着没有许可证。其他人可能已经从代码中删除了许可证并重新发布它。这不会让你全权使用它。
很可能以后，获得版权的原作者（他默认获得版权）可能会来找你。
实际上，这完全取决于他执行版权的能力。这就是所有这些声称其知识产权受到侵犯的科技公司正在发生的事情。 Linux、谷歌、微软、甲骨文的失败都是因为一些与此类似的问题。
如果不是那么复杂的话，重写一下代码就可以了。
This is not legal advice
If there is any doubt in your mind of where it came from you should not use it. Just because the license isn't there doesn't mean there isn't one. Someone else could have stripped the license from the code and reposted it. That wouldn't give you carte-blanche to use it.
It is very possible that at a later date the original author who did Copyright (which he gets the copyright by default) could come after you.
In all reality it would all depend on his ability to enforce his copyright. This is what is happening will all these tech companies claiming their IP has been infringed on. The Linux, Google, Microsoft, Oracle debacles are all because of some similar problem to this.
If it isn't that complicated, just rewrite the code.
默认许可证是 - 如果获得合格的代码 - 您可以阅读该代码。就是这样。 IANAL。
The default license is - if obtained the code eligible - that you are allowed to read the code. And that's it. IANAL.
你在哪里找到的？一个网站（联系站长），一个帖子（联系作者，或者在论坛留言）？您的公司有遗留代码吗？
您应该尝试遵循面包屑并尝试联系作者进行澄清。记录下你是如何联系他的，这样至少你可以证明你没有恶意行事，以防有人投诉。
如果你已经这样做了，但没有任何结果，我会在我的代码中使用它，而不会有太多麻烦。如果作者希望获得版权，他应该附上版权声明。
Where did you find it? A web-site (contact webmaster), a post (contact the author, or leave amessage in the forum)? Legacy code in your company?
You should try to follow the breadcrumbs and try to get to the author to clarify it. Document what you do to contact him, so at least you can prove you have not acted in bad faith in case someone complains.
If you have done that and nothing comes out, I would use it in my code without much of a hassle. If the author wanted it copyrighted, he should have attached a copyright notice to it.