use std::{fmt, str};
use std::sync::Arc;
use std::time::Duration;
use bytes::Bytes;
use futures::{Async, Future, Poll};
use header::{
HeaderMap,
HeaderValue,
ACCEPT,
ACCEPT_ENCODING,
CONTENT_LENGTH,
CONTENT_ENCODING,
CONTENT_TYPE,
LOCATION,
PROXY_AUTHORIZATION,
RANGE,
REFERER,
TRANSFER_ENCODING,
USER_AGENT,
};
use http::Uri;
use hyper::client::ResponseFuture;
use mime;
#[cfg(feature = "default-tls")]
use native_tls::TlsConnector;
use super::request::{Request, RequestBuilder};
use super::response::Response;
use connect::Connector;
use into_url::to_uri;
use redirect::{self, RedirectPolicy, remove_sensitive_headers};
use {IntoUrl, Method, Proxy, StatusCode, Url};
#[cfg(feature = "tls")]
use {Certificate, Identity};
#[cfg(feature = "tls")]
use ::tls::TlsBackend;
static DEFAULT_USER_AGENT: &'static str =
concat!(env!("CARGO_PKG_NAME"), "/", env!("CARGO_PKG_VERSION"));
#[derive(Clone)]
pub struct Client {
inner: Arc<ClientRef>,
}
pub struct ClientBuilder {
config: Config,
}
struct Config {
gzip: bool,
headers: HeaderMap,
#[cfg(feature = "default-tls")]
hostname_verification: bool,
#[cfg(feature = "tls")]
certs_verification: bool,
proxies: Vec<Proxy>,
redirect_policy: RedirectPolicy,
referer: bool,
timeout: Option<Duration>,
#[cfg(feature = "tls")]
root_certs: Vec<Certificate>,
#[cfg(feature = "tls")]
identity: Option<Identity>,
#[cfg(feature = "tls")]
tls: TlsBackend,
}
impl ClientBuilder {
pub fn new() -> ClientBuilder {
let mut headers: HeaderMap<HeaderValue> = HeaderMap::with_capacity(2);
headers.insert(USER_AGENT, HeaderValue::from_static(DEFAULT_USER_AGENT));
headers.insert(ACCEPT, HeaderValue::from_str(mime::STAR_STAR.as_ref()).expect("unable to parse mime"));
ClientBuilder {
config: Config {
gzip: true,
headers: headers,
#[cfg(feature = "default-tls")]
hostname_verification: true,
#[cfg(feature = "tls")]
certs_verification: true,
proxies: Vec::new(),
redirect_policy: RedirectPolicy::default(),
referer: true,
timeout: None,
#[cfg(feature = "tls")]
root_certs: Vec::new(),
#[cfg(feature = "tls")]
identity: None,
#[cfg(feature = "tls")]
tls: TlsBackend::default(),
},
}
}
pub fn build(self) -> ::Result<Client> {
let config = self.config;
let proxies = Arc::new(config.proxies);
let connector = {
#[cfg(feature = "tls")]
match config.tls {
#[cfg(feature = "default-tls")]
TlsBackend::Default => {
let mut tls = TlsConnector::builder();
tls.danger_accept_invalid_hostnames(!config.hostname_verification);
tls.danger_accept_invalid_certs(!config.certs_verification);
for cert in config.root_certs {
cert.add_to_native_tls(&mut tls);
}
if let Some(id) = config.identity {
id.add_to_native_tls(&mut tls)?;
}
Connector::new_default_tls(tls, proxies.clone())?
},
#[cfg(feature = "rustls-tls")]
TlsBackend::Rustls => {
use ::tls::NoVerifier;
let mut tls = ::rustls::ClientConfig::new();
tls.root_store.add_server_trust_anchors(&webpki_roots::TLS_SERVER_ROOTS);
if !config.certs_verification {
tls.dangerous().set_certificate_verifier(Arc::new(NoVerifier));
}
for cert in config.root_certs {
cert.add_to_rustls(&mut tls)?;
}
if let Some(id) = config.identity {
id.add_to_rustls(&mut tls)?;
}
Connector::new_rustls_tls(tls, proxies.clone())?
}
}
#[cfg(not(feature = "tls"))]
Connector::new(proxies.clone())?
};
let hyper_client = ::hyper::Client::builder()
.build(connector);
let proxies_maybe_http_auth = proxies
.iter()
.any(|p| p.maybe_has_http_auth());
Ok(Client {
inner: Arc::new(ClientRef {
gzip: config.gzip,
hyper: hyper_client,
headers: config.headers,
redirect_policy: config.redirect_policy,
referer: config.referer,
proxies,
proxies_maybe_http_auth,
}),
})
}
#[cfg(feature = "default-tls")]
pub fn use_default_tls(mut self) -> ClientBuilder {
self.config.tls = TlsBackend::Default;
self
}
#[cfg(feature = "rustls-tls")]
pub fn use_rustls_tls(mut self) -> ClientBuilder {
self.config.tls = TlsBackend::Rustls;
self
}
#[cfg(feature = "tls")]
pub fn add_root_certificate(mut self, cert: Certificate) -> ClientBuilder {
self.config.root_certs.push(cert);
self
}
#[cfg(feature = "tls")]
pub fn identity(mut self, identity: Identity) -> ClientBuilder {
self.config.identity = Some(identity);
self
}
#[cfg(feature = "default-tls")]
pub fn danger_accept_invalid_hostnames(mut self, accept_invalid_hostname: bool) -> ClientBuilder {
self.config.hostname_verification = !accept_invalid_hostname;
self
}
#[cfg(feature = "tls")]
pub fn danger_accept_invalid_certs(mut self, accept_invalid_certs: bool) -> ClientBuilder {
self.config.certs_verification = !accept_invalid_certs;
self
}
pub fn default_headers(mut self, headers: HeaderMap) -> ClientBuilder {
for (key, value) in headers.iter() {
self.config.headers.insert(key, value.clone());
}
self
}
pub fn gzip(mut self, enable: bool) -> ClientBuilder {
self.config.gzip = enable;
self
}
pub fn proxy(mut self, proxy: Proxy) -> ClientBuilder {
self.config.proxies.push(proxy);
self
}
pub fn redirect(mut self, policy: RedirectPolicy) -> ClientBuilder {
self.config.redirect_policy = policy;
self
}
pub fn referer(mut self, enable: bool) -> ClientBuilder {
self.config.referer = enable;
self
}
pub fn timeout(mut self, timeout: Duration) -> ClientBuilder {
self.config.timeout = Some(timeout);
self
}
#[doc(hidden)]
#[deprecated(note = "DNS no longer uses blocking threads")]
pub fn dns_threads(self, _threads: usize) -> ClientBuilder {
self
}
}
type HyperClient = ::hyper::Client<Connector>;
impl Client {
pub fn new() -> Client {
ClientBuilder::new()
.build()
.expect("Client::new()")
}
pub fn builder() -> ClientBuilder {
ClientBuilder::new()
}
pub fn get<U: IntoUrl>(&self, url: U) -> RequestBuilder {
self.request(Method::GET, url)
}
pub fn post<U: IntoUrl>(&self, url: U) -> RequestBuilder {
self.request(Method::POST, url)
}
pub fn put<U: IntoUrl>(&self, url: U) -> RequestBuilder {
self.request(Method::PUT, url)
}
pub fn patch<U: IntoUrl>(&self, url: U) -> RequestBuilder {
self.request(Method::PATCH, url)
}
pub fn delete<U: IntoUrl>(&self, url: U) -> RequestBuilder {
self.request(Method::DELETE, url)
}
pub fn head<U: IntoUrl>(&self, url: U) -> RequestBuilder {
self.request(Method::HEAD, url)
}
pub fn request<U: IntoUrl>(&self, method: Method, url: U) -> RequestBuilder {
let req = url
.into_url()
.map(move |url| Request::new(method, url));
RequestBuilder::new(self.clone(), req)
}
pub fn execute(&self, request: Request) -> Pending {
self.execute_request(request)
}
fn execute_request(&self, req: Request) -> Pending {
let (
method,
url,
user_headers,
body
) = req.pieces();
let mut headers = self.inner.headers.clone();
for (key, value) in user_headers.iter() {
headers.insert(key, value.clone());
}
if self.inner.gzip &&
!headers.contains_key(ACCEPT_ENCODING) &&
!headers.contains_key(RANGE) {
headers.insert(ACCEPT_ENCODING, HeaderValue::from_static("gzip"));
}
let uri = to_uri(&url);
let (reusable, body) = match body {
Some(body) => {
let (reusable, body) = body.into_hyper();
(Some(reusable), body)
},
None => {
(None, ::hyper::Body::empty())
}
};
self.proxy_auth(&uri, &mut headers);
let mut req = ::hyper::Request::builder()
.method(method.clone())
.uri(uri.clone())
.body(body)
.expect("valid request parts");
*req.headers_mut() = headers.clone();
let in_flight = self.inner.hyper.request(req);
Pending {
inner: PendingInner::Request(PendingRequest {
method: method,
url: url,
headers: headers,
body: reusable,
urls: Vec::new(),
client: self.inner.clone(),
in_flight: in_flight,
}),
}
}
fn proxy_auth(&self, dst: &Uri, headers: &mut HeaderMap) {
if !self.inner.proxies_maybe_http_auth {
return;
}
if dst.scheme_part() != Some(&::http::uri::Scheme::HTTP) {
return;
}
if headers.contains_key(PROXY_AUTHORIZATION) {
return;
}
for proxy in self.inner.proxies.iter() {
if proxy.is_match(dst) {
match proxy.auth() {
Some(::proxy::Auth::Basic(ref header)) => {
headers.insert(
PROXY_AUTHORIZATION,
header.clone()
);
},
None => (),
}
break;
}
}
}
}
impl fmt::Debug for Client {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
f.debug_struct("Client")
.field("gzip", &self.inner.gzip)
.field("redirect_policy", &self.inner.redirect_policy)
.field("referer", &self.inner.referer)
.finish()
}
}
impl fmt::Debug for ClientBuilder {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
f.debug_struct("ClientBuilder")
.finish()
}
}
struct ClientRef {
gzip: bool,
headers: HeaderMap,
hyper: HyperClient,
redirect_policy: RedirectPolicy,
referer: bool,
proxies: Arc<Vec<Proxy>>,
proxies_maybe_http_auth: bool,
}
pub struct Pending {
inner: PendingInner,
}
enum PendingInner {
Request(PendingRequest),
Error(Option<::Error>),
}
struct PendingRequest {
method: Method,
url: Url,
headers: HeaderMap,
body: Option<Option<Bytes>>,
urls: Vec<Url>,
client: Arc<ClientRef>,
in_flight: ResponseFuture,
}
impl Pending {
pub(super) fn new_err(err: ::Error) -> Pending {
Pending {
inner: PendingInner::Error(Some(err)),
}
}
}
impl Future for Pending {
type Item = Response;
type Error = ::Error;
fn poll(&mut self) -> Poll<Self::Item, Self::Error> {
match self.inner {
PendingInner::Request(ref mut req) => req.poll(),
PendingInner::Error(ref mut err) => Err(err.take().expect("Pending error polled more than once")),
}
}
}
impl Future for PendingRequest {
type Item = Response;
type Error = ::Error;
fn poll(&mut self) -> Poll<Self::Item, Self::Error> {
loop {
let res = match try_!(self.in_flight.poll(), &self.url) {
Async::Ready(res) => res,
Async::NotReady => return Ok(Async::NotReady),
};
let should_redirect = match res.status() {
StatusCode::MOVED_PERMANENTLY |
StatusCode::FOUND |
StatusCode::SEE_OTHER => {
self.body = None;
for header in &[TRANSFER_ENCODING, CONTENT_ENCODING, CONTENT_TYPE, CONTENT_LENGTH] {
self.headers.remove(header);
}
match self.method {
Method::GET | Method::HEAD => {},
_ => {
self.method = Method::GET;
}
}
true
},
StatusCode::TEMPORARY_REDIRECT |
StatusCode::PERMANENT_REDIRECT => match self.body {
Some(Some(_)) | None => true,
Some(None) => false,
},
_ => false,
};
if should_redirect {
let loc = res.headers()
.get(LOCATION)
.and_then(|val| {
let loc = (|| -> Option<Url> {
self.url.join(str::from_utf8(val.as_bytes()).ok()?).ok()
})();
if loc.is_none() {
debug!("Location header had invalid URI: {:?}", val);
}
loc
});
if let Some(loc) = loc {
if self.client.referer {
if let Some(referer) = make_referer(&loc, &self.url) {
self.headers.insert(REFERER, referer);
}
}
self.urls.push(self.url.clone());
let action = self.client.redirect_policy.check(
res.status(),
&loc,
&self.urls,
);
match action {
redirect::Action::Follow => {
self.url = loc;
remove_sensitive_headers(&mut self.headers, &self.url, &self.urls);
debug!("redirecting to {:?} '{}'", self.method, self.url);
let uri = to_uri(&self.url);
let body = match self.body {
Some(Some(ref body)) => ::hyper::Body::from(body.clone()),
_ => ::hyper::Body::empty(),
};
let mut req = ::hyper::Request::builder()
.method(self.method.clone())
.uri(uri.clone())
.body(body)
.expect("valid request parts");
*req.headers_mut() = self.headers.clone();
self.in_flight = self.client.hyper.request(req);
continue;
},
redirect::Action::Stop => {
debug!("redirect_policy disallowed redirection to '{}'", loc);
},
redirect::Action::LoopDetected => {
return Err(::error::loop_detected(self.url.clone()));
},
redirect::Action::TooManyRedirects => {
return Err(::error::too_many_redirects(self.url.clone()));
}
}
}
}
let res = Response::new(res, self.url.clone(), self.client.gzip);
return Ok(Async::Ready(res));
}
}
}
impl fmt::Debug for Pending {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
match self.inner {
PendingInner::Request(ref req) => {
f.debug_struct("Pending")
.field("method", &req.method)
.field("url", &req.url)
.finish()
},
PendingInner::Error(ref err) => {
f.debug_struct("Pending")
.field("error", err)
.finish()
}
}
}
}
fn make_referer(next: &Url, previous: &Url) -> Option<HeaderValue> {
if next.scheme() == "http" && previous.scheme() == "https" {
return None;
}
let mut referer = previous.clone();
let _ = referer.set_username("");
let _ = referer.set_password(None);
referer.set_fragment(None);
referer.as_str().parse().ok()
}