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// Copyright 2018-2019 the Deno authors. All rights reserved. MIT license.
use crate::errors;
use crate::errors::DenoError;
use futures::future::{loop_fn, Loop};
use futures::{future, Future, Stream};
use hyper;
use hyper::client::{Client, HttpConnector};
use hyper::header::CONTENT_TYPE;
use hyper::Uri;
use hyper_rustls;
type Connector = hyper_rustls::HttpsConnector<HttpConnector>;
lazy_static! {
static ref CONNECTOR: Connector = {
let num_dns_threads = 4;
Connector::new(num_dns_threads)
};
}
pub fn get_client() -> Client<Connector, hyper::Body> {
// TODO use Hyper's connection pool.
let c = CONNECTOR.clone();
Client::builder().build(c)
}
/// Construct the next uri based on base uri and location header fragment
/// See <https://tools.ietf.org/html/rfc3986#section-4.2>
fn resolve_uri_from_location(base_uri: &Uri, location: &str) -> Uri {
if location.starts_with("http://") || location.starts_with("https://") {
// absolute uri
location
.parse::<Uri>()
.expect("provided redirect url should be a valid url")
} else if location.starts_with("//") {
// "//" authority path-abempty
format!("{}:{}", base_uri.scheme_part().unwrap().as_str(), location)
.parse::<Uri>()
.expect("provided redirect url should be a valid url")
} else if location.starts_with('/') {
// path-absolute
let mut new_uri_parts = base_uri.clone().into_parts();
new_uri_parts.path_and_query = Some(location.parse().unwrap());
Uri::from_parts(new_uri_parts).unwrap()
} else {
// assuming path-noscheme | path-empty
let mut new_uri_parts = base_uri.clone().into_parts();
new_uri_parts.path_and_query =
Some(format!("{}/{}", base_uri.path(), location).parse().unwrap());
Uri::from_parts(new_uri_parts).unwrap()
}
}
#[cfg(test)]
use crate::errors::DenoResult;
#[cfg(test)]
use crate::tokio_util;
#[cfg(test)]
/// Synchronously fetchs the given HTTP URL. Returns (content, media_type).
pub fn fetch_sync_string(module_name: &str) -> DenoResult<(String, String)> {
tokio_util::block_on(fetch_string(module_name))
}
/// Asynchronously fetchs the given HTTP URL. Returns (content, media_type).
pub fn fetch_string(
module_name: &str,
) -> impl Future<Item = (String, String), Error = DenoError> {
let url = module_name.parse::<Uri>().unwrap();
let client = get_client();
// TODO(kevinkassimo): consider set a max redirection counter
// to avoid bouncing between 2 or more urls
loop_fn((client, url), |(client, url)| {
client
.get(url.clone())
.map_err(DenoError::from)
.and_then(move |response| {
if response.status().is_redirection() {
let location_string = response
.headers()
.get("location")
.expect("url redirection should provide 'location' header")
.to_str()
.unwrap()
.to_string();
debug!("Redirecting to {}...", &location_string);
let new_url = resolve_uri_from_location(&url, &location_string);
return Ok(Loop::Continue((client, new_url)));
}
if !response.status().is_success() {
return Err(errors::new(
errors::ErrorKind::NotFound,
"module not found".to_string(),
));
}
Ok(Loop::Break(response))
})
}).and_then(|response| {
let content_type = response
.headers()
.get(CONTENT_TYPE)
.map(|content_type| content_type.to_str().unwrap().to_string());
let body = response
.into_body()
.concat2()
.map(|body| String::from_utf8(body.to_vec()).unwrap())
.map_err(DenoError::from);
body.join(future::ok(content_type))
}).and_then(|(body_string, maybe_content_type)| {
future::ok((body_string, maybe_content_type.unwrap()))
})
}
#[test]
fn test_fetch_sync_string() {
// Relies on external http server. See tools/http_server.py
tokio_util::init(|| {
let (p, m) =
fetch_sync_string("http://127.0.0.1:4545/package.json").unwrap();
println!("package.json len {}", p.len());
assert!(p.len() > 1);
assert!(m == "application/json")
});
}
#[test]
fn test_fetch_string() {
// Relies on external http server. See tools/http_server.py
tokio_util::init(|| {
let (p, m) = fetch_string("http://127.0.0.1:4545/package.json")
.wait()
.unwrap();
println!("package.json len {}", p.len());
assert!(p.len() > 1);
assert!(m == "application/json")
});
}
#[test]
fn test_fetch_sync_string_with_redirect() {
// Relies on external http server. See tools/http_server.py
tokio_util::init(|| {
let (p, m) =
fetch_sync_string("http://127.0.0.1:4546/package.json").unwrap();
println!("package.json len {}", p.len());
assert!(p.len() > 1);
assert!(m == "application/json")
});
}
#[test]
fn test_resolve_uri_from_location_full_1() {
let url = "http://deno.land".parse::<Uri>().unwrap();
let new_uri = resolve_uri_from_location(&url, "http://golang.org");
assert_eq!(new_uri.host().unwrap(), "golang.org");
}
#[test]
fn test_resolve_uri_from_location_full_2() {
let url = "https://deno.land".parse::<Uri>().unwrap();
let new_uri = resolve_uri_from_location(&url, "https://golang.org");
assert_eq!(new_uri.host().unwrap(), "golang.org");
}
#[test]
fn test_resolve_uri_from_location_relative_1() {
let url = "http://deno.land/x".parse::<Uri>().unwrap();
let new_uri = resolve_uri_from_location(&url, "//rust-lang.org/en-US");
assert_eq!(new_uri.host().unwrap(), "rust-lang.org");
assert_eq!(new_uri.path(), "/en-US");
}
#[test]
fn test_resolve_uri_from_location_relative_2() {
let url = "http://deno.land/x".parse::<Uri>().unwrap();
let new_uri = resolve_uri_from_location(&url, "/y");
assert_eq!(new_uri.host().unwrap(), "deno.land");
assert_eq!(new_uri.path(), "/y");
}
#[test]
fn test_resolve_uri_from_location_relative_3() {
let url = "http://deno.land/x".parse::<Uri>().unwrap();
let new_uri = resolve_uri_from_location(&url, "z");
assert_eq!(new_uri.host().unwrap(), "deno.land");
assert_eq!(new_uri.path(), "/x/z");
}
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