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【速搜问答】什么是磁力链接

问答 admin 2年前 (2020-06-08) 659次浏览 已收录 0个评论

汉英对照:
Chinese-English Translation:

磁力链接(Magnet URI scheme),是对等网络中进行信息检索和下载文档的电脑程序。和基于“位置”连接的统一资源定位符(URL)不同,磁力链接是基于元数据(metadata)文件内容,属于统一资源名称(URN)。

Magnet URI scheme is a computer program for information retrieval and document downloading in peer-to-peer network. Different from the URL based on location connection, magnetic link is based on metadata file content and belongs to urn.

磁力链接(Magnet URI scheme),是对等网络中进行信息检索和下载文档的电脑程序。和基于“位置”连接的统一资源定位符(URL)不同,磁力链接是基于元数据(metadata)文件内容,属于统一资源名称(URN)。

Magnet URI scheme is a computer program for information retrieval and document downloading in peer-to-peer network. Different from the URL based on location connection, magnetic link is based on metadata file content and belongs to urn.

也就是说,磁力链接不基于文档的 IP 地址或定位符,而是在分布式数据库中,通过散列函数值来识别、搜索来下载文档。因为不依赖一个处于启动状态的主机来下载文档,所以特别适用没有中心服务器的对等网络。举例来说,一个常见的磁力链接形式为“magnet:?xt=urn:btih:”。

That is to say, the magnetic link is not based on the IP address or location character of the document, but in the distributed database, through the hash function value to identify and search to download the document. Because it does not rely on a starting host to download documents, it is particularly suitable for peer-to-peer networks without a central server. For example, a common form of magnetic link is “magnet:? XT= urn:btih :”。

特点

characteristic

众所周知,BT 下载速度不够稳定,当中断时则无法完整下载。

As we all know, BT download speed is not stable enough to download completely when it is interrupted.

磁力链接很好地解决了这个问题。磁力链接的问世与大行其道,标志着 BT 1.0 时代已经过去,BT 2.0 时代已经到来。

Magnetic linkage solves this problem well. The appearance and popularity of magnetic link mark that BT 1.0 era has passed and BT 2.0 era has come.

深刻理解磁力链接

Deep understanding of magnetic link

简单地说,磁力链接是一种特殊链接,但是它与传统基于文件的位置或名称的普通链接(如 http://xxx)不一样,它只是通过不同文件内容的 Hash 结果生成一个纯文本的“数字指纹”,并用它来识别文件。

Simply put, a magnetic link is a special link, but it’s a common link to a traditional file based location or name (such as http://xxx )Different, it just generates a pure text “digital fingerprint” through the hash results of different file contents, and uses it to identify the file.

它类似于生活消费品包装上常见的条码,不同的是这个“数字指纹”可以被任何人从任何文件上生成,这也就注定了磁力链接不需要任何“中心机构”的支持,且识别准确度极高。

It is similar to the common barcode on the packaging of consumer goods. The difference is that this “digital fingerprint” can be generated by anyone from any file, which means that the magnetic link does not need the support of any “central mechanism”, and the recognition accuracy is very high.

因此任何人都可以生成一个 Magnet 链接并确保通过该链接下载的文件准确无误。

So anyone can generate a magnet link and make sure that the files downloaded through that link are accurate.

内容散列函数应用

Application of content hash function

磁力链接最常见的用途是基于文件内容的散列函数值来链接到特定文件,生成一个唯一的文件识别符,类似于 ISBN。不像常规的识别符,内容散列可以被任意一位持有此文件的人生成,所以并不需要一个中心机构,这使其在文件共享领域经常被用作搜索条件,因任何人都可以分发一个磁力链接来确保该链接指向的资源就是他想要的,而和得到该资源的方式无关。

The most common use of magnetic link is to link to a specific file based on the hash function value of the file content, generating a unique file ID, similar to ISBN. Unlike the conventional identifier, the content hash can be generated by any person who holds the file, so there is no need for a central organization, which makes it often used as a search condition in the field of file sharing, because anyone can distribute a magnetic link to ensure that the resource to which the link refers is what he wants, regardless of the way to get the resource.

另一个磁力链接的优势是开放性和跨平台性:一个磁力链接可被运行在几乎所有平台上的应用程序们使用以下载一个文件。因为磁力链接十分简洁且为纯文本格式,所以用户可以很方便地将其复制到电子邮件或即时消息中,比如种子文件。

Another advantage of magnetic links is openness and cross platform: a magnetic link can be used by applications running on almost all platforms to download a file. Because magnetic links are simple and plain text, users can easily copy them to e-mail or instant messages, such as seed files.


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