官方英文链接 https://doc.rust-lang.org/cargo/reference/source-replacement.html
Rust编译时如果遇到如下问题：
Downloading futures v0.1.19 warning: spurious network error (2 tries remaining): [28] Timeout was reached (Operation timed out after 30857 milliseconds with 0 out of 0 bytes received) error: unable to get packages from source Caused by: [35] SSL connect error (OpenSSL SSL_connect: SSL_ERROR_SYSCALL in connection to static.crates.io:443 )
解决办法：更换Crates源
Rust开发时, 即便网络牛X
, 国外的源, 某些兄弟也连得上, 但笔者相信大多数情况下使用官方的源都太慢，建议您考虑更换使用国内中科大的源。更换方法如下：
先在控制台cd ~/.cargo然后vim config, 这样在 $HOME/.cargo/config文件当中添加如下内容：
[source.crates-io] replace-with = 'ustc' [source.ustc] registry = "git://mirrors.ustc.edu.cn/crates.io-index"
如果所处的环境中不允许使用 git 协议，可以把上述地址改为：
registry = "https://mirrors.ustc.edu.cn/crates.io-index"
