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extern crate atty;
use flags::DenoFlags;
use errors::permission_denied;
use errors::DenoResult;
use std::io;
#[derive(Debug, Default, PartialEq)]
pub struct DenoPermissions {
pub allow_write: bool,
pub allow_net: bool,
pub allow_env: bool,
}
impl DenoPermissions {
pub fn new(flags: &DenoFlags) -> DenoPermissions {
DenoPermissions {
allow_write: flags.allow_write,
allow_env: flags.allow_env,
allow_net: flags.allow_net,
}
}
pub fn check_write(&mut self, filename: &str) -> DenoResult<()> {
if self.allow_write {
return Ok(());
};
// TODO get location (where access occurred)
let r = permission_prompt(format!(
"Deno requests write access to \"{}\".",
filename
));;
if r.is_ok() {
self.allow_write = true;
}
r
}
pub fn check_net(&mut self, domain_name: &str) -> DenoResult<()> {
if self.allow_net {
return Ok(());
};
// TODO get location (where access occurred)
let r = permission_prompt(format!(
"Deno requests network access to \"{}\".",
domain_name
));
if r.is_ok() {
self.allow_net = true;
}
r
}
pub fn check_env(&mut self) -> DenoResult<()> {
if self.allow_env {
return Ok(());
};
// TODO get location (where access occurred)
let r = permission_prompt(
"Deno requests access to environment variables.".to_string(),
);
if r.is_ok() {
self.allow_env = true;
}
r
}
}
fn permission_prompt(message: String) -> DenoResult<()> {
if !atty::is(atty::Stream::Stdin) || !atty::is(atty::Stream::Stderr) {
return Err(permission_denied());
};
// print to stderr so that if deno is > to a file this is still displayed.
eprint!("{} Grant? [yN] ", message);
let mut input = String::new();
let stdin = io::stdin();
let _nread = stdin.read_line(&mut input)?;
let ch = input.chars().next().unwrap();
let is_yes = ch == 'y' || ch == 'Y';
if is_yes {
Ok(())
} else {
Err(permission_denied())
}
}
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