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use regex::Regex;
use thiserror::Error;
#[derive(Error, Debug)]
pub enum SandboxError {
#[error("the string `{0}` is not a valid image digest")]
InvalidDigest(String),
#[error("the string `{0}` is not a valid image name")]
InvalidImage(String),
#[error("unexpected digest `{0}`")]
UnexpectedDigest(String),
}
#[derive(Clone, Debug)]
pub struct ImageDigest{
pub image: Image,
pub digest: Digest
}
impl ImageDigest {
pub fn parse(image: &str, digest: &str) -> Result<ImageDigest, SandboxError> {
Ok(ImageDigest{
image: Image::parse(image)?,
digest: Digest::parse(digest)?
})
}
}
#[derive(Clone, Debug)]
pub struct Image {
inner: String
}
impl Image {
pub fn parse(s: &str) -> Result<Image, SandboxError> {
lazy_static! {
static ref RE: Regex = Regex::new(
r"(?x)^
(?: # Optional domain
(?: # First domain component
[a-zA-Z0-9] |
[a-zA-Z0-9][a-zA-Z0-9-]*[a-zA-Z0-9]
)
(?: # Optional additional domain components
\.
(?:
[a-zA-Z0-9] |
[a-zA-Z0-9][a-zA-Z0-9-]*[a-zA-Z0-9]
)
)*
(?: # Optional port number
:[0-9]+
)?
/
)?
(?: # Main name component
[a-z0-9]+
(?:
(?: [._] | __ | [-]* )
[a-z0-9]+
)*
)
(?: # Optional additional name components
/
[a-z0-9]+
(?:
(?: [._] | __ | [-]* )
[a-z0-9]+
)*
)*
(?: # Optional tag
:
[\w][\w.-]*
)?
$").unwrap();
}
let inner = s.to_owned();
if RE.is_match(&inner) {
Ok(Image { inner })
} else {
Err(SandboxError::InvalidImage(inner))
}
}
pub fn as_str(&self) -> &str {
self.inner.as_str()
}
}
#[derive(Clone, Debug)]
pub struct Digest {
inner: String
}
impl Digest {
pub fn parse(s: &str) -> Result<Digest, SandboxError> {
lazy_static! {
static ref RE: Regex = Regex::new(
r"(?x)^
(?: # Optional type
[A-Za-z][A-Za-z0-9]*
(?:
[-_+.][A-Za-z][A-Za-z0-9]*
)*
:
)?
[[:xdigit:]]{32,} # At least a 32-digit hex number
$").unwrap();
}
let inner = s.to_owned();
if RE.is_match(&inner) {
Ok(Digest { inner })
} else {
Err(SandboxError::InvalidDigest(inner))
}
}
pub fn as_str(&self) -> &str {
self.inner.as_str()
}
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn parse_image_name() {
assert!(Image::parse("balls").is_ok());
assert!(Image::parse("balls/").is_err());
assert!(Image::parse("balls/etc").is_ok());
assert!(Image::parse("balls/etc/and/more").is_ok());
assert!(Image::parse("b-a-l-l-s").is_ok());
assert!(Image::parse("-balls").is_err());
assert!(Image::parse("--balls").is_err());
assert!(Image::parse("b--alls").is_ok());
assert!(Image::parse("balls.io/image/of/my/balls").is_ok());
assert!(Image::parse("balls.io/image/of/my/balls:").is_err());
assert!(Image::parse("balls.io/image/of/my/balls:?").is_err());
assert!(Image::parse("balls.io/image/of/my/balls:0").is_ok());
assert!(Image::parse("balls.io/image/of/my/balls:.").is_err());
assert!(Image::parse("balls.io/image/of/my/balls:0.0").is_ok());
assert!(Image::parse("balls.io/image/of//balls").is_err());
assert!(Image::parse(" balls").is_err());
assert!(Image::parse("balls ").is_err());
assert!(Image::parse("balls:69").is_ok());
assert!(Image::parse("balls:6.9").is_ok());
assert!(Image::parse("balls:").is_err());
assert!(Image::parse("balls.io:69/ball").is_ok());
assert!(Image::parse("balls.io:/ball").is_err());
}
#[test]
fn parse_digest_name() {
assert!(Digest::parse("balls").is_err());
assert!(Digest::parse("balls:0123456789abcdef0123456789abcdef").is_ok());
assert!(Digest::parse("-balls:0123456789abcdef0123456789abcdef").is_err());
assert!(Digest::parse("--balls:0123456789abcdef0123456789abcdef").is_err());
assert!(Digest::parse("b_b+b+b+b+b+b.balllllls:0123456789abcdef0123456789abcdef").is_ok());
assert!(Digest::parse("b_b+b+b++b+b.balllllls:0123456789abcdef0123456789abcdef").is_err());
assert!(Digest::parse("balls:0123456789abcdef0123456789abcdef").is_ok());
assert!(Digest::parse("balls:0123456789abcdef0123456789abcdeg").is_err());
assert!(Digest::parse("balls:0123456789abcdef0123456789abcdefF").is_ok());
assert!(Digest::parse("ball.ball.ball.balls:0123456789abcdef0123456789abcdef").is_ok());
assert!(Digest::parse("0123456789abcdef0123456789abcdef").is_ok());
assert!(Digest::parse(":0123456789abcdef0123456789abcdef").is_err());
assert!(Digest::parse("balls:0123456789abcdef0123456789abcde").is_err());
assert!(Digest::parse("b9:0123456789abcdef0123456789abcdef").is_ok());
assert!(Digest::parse("b:0123456789abcdef0123456789abcdef").is_ok());
assert!(Digest::parse("9:0123456789abcdef0123456789abcdef").is_err());
assert!(Digest::parse(" balls:0123456789abcdef0123456789abcdef").is_err());
assert!(Digest::parse("balls:0123456789abcdef0123456789abcdef ").is_err());
}
}