Pest local build

[paopaowowwow]

I am new to pest and rust, I tried to use "cargo add pest" to install pest for my rust project, however, it doesn't work, error as below, so can I download the source code and proceed with local build? if yes, how? thank you
warning: spurious network error (3 tries remaining): [6] Couldn't resolve host name (Could not resolve host: index.crates.io)
warning: spurious network error (2 tries remaining): [6] Couldn't resolve host name (Could not resolve host: index.crates.io)
warning: spurious network error (1 tries remaining): [6] Couldn't resolve host name (Could not resolve host: index.crates.io)
error: failed to query replaced source registry crates-io

Caused by:
download of config.json failed

Caused by:
failed to download from https://index.crates.io/config.json

Caused by:
[6] Couldn't resolve host name (Could not resolve host: index.crates.io)

[Jamalam360]

This is just a network error, either with your connection or there was an issue with crates.io.

It should work if you try again and ensure your connection is ok

[paopaowowwow]

thank you for your reply, do you know how to fix the connection? I downloaded pest source codes and try to proceed with cargo build, then the error occurs. but I can browse crates.io. with chrome. when I try to run cargo install in terminal, then above error happens. not sure if our company blocked the site.

[Jamalam360]

It might be blocked but it'd be weird to have the index blocked and not crates itself. Can you go to https://index.crates.io/config.json?

[paopaowowwow]

I can view it with browse. and I can view https://crates.io/ as well. proceed with cargo build in project, then errors happen, do I need to update anything in .cargo/confige.toml?
{
"dl": "https://crates.io/api/v1/crates",
"api": "https://crates.io"
}