use std::fmt;
use std::sync::Arc;
use hyper::Uri;
use {into_url, IntoUrl, Url};
#[derive(Clone, Debug)]
pub struct Proxy {
intercept: Intercept,
}
impl Proxy {
pub fn http<U: IntoUrl>(url: U) -> ::Result<Proxy> {
let uri = ::into_url::to_uri(&try_!(url.into_url()));
Ok(Proxy::new(Intercept::Http(uri)))
}
pub fn https<U: IntoUrl>(url: U) -> ::Result<Proxy> {
let uri = ::into_url::to_uri(&try_!(url.into_url()));
Ok(Proxy::new(Intercept::Https(uri)))
}
pub fn all<U: IntoUrl>(url: U) -> ::Result<Proxy> {
let uri = ::into_url::to_uri(&try_!(url.into_url()));
Ok(Proxy::new(Intercept::All(uri)))
}
pub fn custom<F>(fun: F) -> Proxy
where F: Fn(&Url) -> Option<Url> + Send + Sync + 'static {
Proxy::new(Intercept::Custom(Custom(Arc::new(fun))))
}
fn new(intercept: Intercept) -> Proxy {
Proxy {
intercept: intercept,
}
}
fn proxies(&self, url: &Url) -> bool {
match self.intercept {
Intercept::All(..) => true,
Intercept::Http(..) => url.scheme() == "http",
Intercept::Https(..) => url.scheme() == "https",
Intercept::Custom(ref fun) => (fun.0)(url).is_some(),
}
}
fn intercept(&self, uri: &Uri) -> Option<Uri> {
match self.intercept {
Intercept::All(ref u) => Some(u.clone()),
Intercept::Http(ref u) => {
if uri.scheme() == Some("http") {
Some(u.clone())
} else {
None
}
},
Intercept::Https(ref u) => {
if uri.scheme() == Some("https") {
Some(u.clone())
} else {
None
}
},
Intercept::Custom(ref fun) => {
(fun.0)(&into_url::to_url(uri))
.map(|u| into_url::to_uri(&u))
},
}
}
}
#[derive(Clone, Debug)]
enum Intercept {
All(Uri),
Http(Uri),
Https(Uri),
Custom(Custom),
}
#[derive(Clone)]
struct Custom(Arc<Fn(&Url) -> Option<Url> + Send + Sync + 'static>);
impl fmt::Debug for Custom {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
f.write_str("_")
}
}
pub fn intercept(proxy: &Proxy, uri: &Uri) -> Option<Uri> {
proxy.intercept(uri)
}
pub fn is_proxied(proxies: &[Proxy], uri: &Url) -> bool {
proxies.iter().any(|p| p.proxies(uri))
}
#[cfg(test)]
mod tests {
use super::*;
fn uri(s: &str) -> Uri {
s.parse().unwrap()
}
fn url(s: &str) -> Url {
s.parse().unwrap()
}
#[test]
fn test_http() {
let target = "http://example.domain/";
let p = Proxy::http(target).unwrap();
let http = "http://hyper.rs";
let other = "https://hyper.rs";
assert!(p.proxies(&url(http)));
assert_eq!(p.intercept(&uri(http)).unwrap(), target);
assert!(!p.proxies(&url(other)));
assert!(p.intercept(&uri(other)).is_none());
}
#[test]
fn test_https() {
let target = "http://example.domain/";
let p = Proxy::https(target).unwrap();
let http = "http://hyper.rs";
let other = "https://hyper.rs";
assert!(!p.proxies(&url(http)));
assert!(p.intercept(&uri(http)).is_none());
assert!(p.proxies(&url(other)));
assert_eq!(p.intercept(&uri(other)).unwrap(), target);
}
#[test]
fn test_all() {
let target = "http://example.domain/";
let p = Proxy::all(target).unwrap();
let http = "http://hyper.rs";
let https = "https://hyper.rs";
let other = "x-youve-never-heard-of-me-mr-proxy://hyper.rs";
assert!(p.proxies(&url(http)));
assert!(p.proxies(&url(https)));
assert!(p.proxies(&url(other)));
assert_eq!(p.intercept(&uri(http)).unwrap(), target);
assert_eq!(p.intercept(&uri(https)).unwrap(), target);
assert_eq!(p.intercept(&uri(other)).unwrap(), target);
}
#[test]
fn test_custom() {
let target1 = "http://example.domain/";
let target2 = "https://example.domain/";
let p = Proxy::custom(move |url| {
if url.host_str() == Some("hyper.rs") {
target1.parse().ok()
} else if url.scheme() == "http" {
target2.parse().ok()
} else {
None
}
});
let http = "http://seanmonstar.com";
let https = "https://hyper.rs";
let other = "x-youve-never-heard-of-me-mr-proxy://seanmonstar.com";
assert!(p.proxies(&url(http)));
assert!(p.proxies(&url(https)));
assert!(!p.proxies(&url(other)));
assert_eq!(p.intercept(&uri(http)).unwrap(), target2);
assert_eq!(p.intercept(&uri(https)).unwrap(), target1);
assert!(p.intercept(&uri(other)).is_none());
}
#[test]
fn test_is_proxied() {
let proxies = vec![
Proxy::http("http://example.domain").unwrap(),
Proxy::https("http://other.domain").unwrap(),
];
let http = "http://hyper.rs".parse().unwrap();
let https = "https://hyper.rs".parse().unwrap();
let other = "x-other://hyper.rs".parse().unwrap();
assert!(is_proxied(&proxies, &http));
assert!(is_proxied(&proxies, &https));
assert!(!is_proxied(&proxies, &other));
}
}