feat: sftp server support #7643
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xhofe
approved these changes
Dec 12, 2024
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SFTP server endpoint powered by taruti/sftpd (with reference to leffss/sftpd)
Listen on 5222 port by default.
这个跟 FTP 服务器一样，也是除了我试了好像没问题以外什么都不能保证，SFTP 比 FTP 还过分，接口天然就是随机访问的形式的，哪怕客户端就是要顺序读写，也必须以随机读写的形式请求。这两个协议跟用 HTTP 传文件的那些协议设计理念上差距挺大的，适配起来确实很拧巴，就凑合着用吧。
FTP 实现了一个自定义命令
SITE SIZE，在使用STOR命令上传文件之前可以先使用这个命令提交文件大小，之后上传的时候就不会在本地产生临时文件，而是直接将数据流转发到存储介质了，不过要利用这个特性可能还需要写一些 FTP 客户端插件。我最开始看到 SFTP 上传文件会提交一个 length 参数，以为是完整的文件大小才写的这个 feat，后来才发现它其实是文件分片的大小，所以这个和 SFTP 没有关系的 feat 只能挤在这个提交里了。TODO: