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Copy pathhttp.rs
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311 lines (265 loc) · 9.19 KB
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use crate::{
dns::Resolver,
internal_events::http_client,
tls::{tls_connector_builder, MaybeTlsSettings, TlsError},
};
use futures::future::BoxFuture;
use headers::{Authorization, HeaderMapExt};
use http::header::HeaderValue;
use http::request::Builder;
use http::HeaderMap;
use http::Request;
use hyper::{
body::{Body, HttpBody},
client::{Client, HttpConnector},
};
use hyper_openssl::HttpsConnector;
use percent_encoding::percent_decode;
use serde::{Deserialize, Serialize};
use snafu::{ResultExt, Snafu};
use std::{
fmt,
task::{Context, Poll},
};
use tower::Service;
use tracing::Span;
use tracing_futures::Instrument;
#[derive(Debug, Snafu)]
pub enum HttpError {
#[snafu(display("Failed to build TLS connector"))]
BuildTlsConnector { source: TlsError },
#[snafu(display("Failed to build HTTPS connector"))]
MakeHttpsConnector { source: openssl::error::ErrorStack },
#[snafu(display("Failed to make HTTP(S) request"))]
CallRequest { source: hyper::Error },
}
pub type HttpClientFuture = <HttpClient as Service<http::Request<Body>>>::Future;
pub struct HttpClient<B = Body> {
client: Client<HttpsConnector<HttpConnector<Resolver>>, B>,
span: Span,
user_agent: HeaderValue,
}
impl<B> HttpClient<B>
where
B: fmt::Debug + HttpBody + Send + 'static,
B::Data: Send,
B::Error: Into<crate::Error>,
{
pub fn new(tls_settings: impl Into<MaybeTlsSettings>) -> Result<HttpClient<B>, HttpError> {
let mut http = HttpConnector::new_with_resolver(Resolver);
http.enforce_http(false);
let settings = tls_settings.into();
let tls = tls_connector_builder(&settings).context(BuildTlsConnector)?;
let mut https = HttpsConnector::with_connector(http, tls).context(MakeHttpsConnector)?;
let settings = settings.tls().cloned();
https.set_callback(move |c, _uri| {
if let Some(settings) = &settings {
settings.apply_connect_configuration(c);
}
Ok(())
});
let client = Client::builder().build(https);
let version = crate::get_version();
let user_agent = HeaderValue::from_str(&format!("Vector/{}", version))
.expect("Invalid header value for version!");
let span = tracing::info_span!("http");
Ok(HttpClient {
client,
span,
user_agent,
})
}
pub fn send(
&self,
mut request: Request<B>,
) -> BoxFuture<'static, Result<http::Response<Body>, HttpError>> {
let _enter = self.span.enter();
if !request.headers().contains_key("User-Agent") {
request
.headers_mut()
.insert("User-Agent", self.user_agent.clone());
}
emit!(http_client::AboutToSendHTTPRequest { request: &request });
let response = self.client.request(request);
let fut = async move {
// Capture the time right before we issue the request.
// Request doesn't start the processing until we start polling it.
let before = std::time::Instant::now();
// Send request and wait for the result.
let response_result = response.await;
// Compute the roundtrip time it took to send the request and get
// the response or error.
let roundtrip = before.elapsed();
// Handle the errors and extract the response.
let response = response_result
.map_err(|error| {
// Emit the error into the internal events system.
emit!(http_client::GotHTTPError {
error: &error,
roundtrip
});
error
})
.context(CallRequest)?;
// Emit the response into the internal events system.
emit!(http_client::GotHTTPResponse {
response: &response,
roundtrip
});
Ok(response)
}
.instrument(self.span.clone());
Box::pin(fut)
}
}
impl<B> Service<Request<B>> for HttpClient<B>
where
B: fmt::Debug + HttpBody + Send + 'static,
B::Data: Send,
B::Error: Into<crate::Error>,
{
type Response = http::Response<Body>;
type Error = HttpError;
type Future = BoxFuture<'static, Result<Self::Response, Self::Error>>;
fn poll_ready(&mut self, _cx: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
Poll::Ready(Ok(()))
}
fn call(&mut self, request: Request<B>) -> Self::Future {
self.send(request)
}
}
impl<B> Clone for HttpClient<B> {
fn clone(&self) -> Self {
Self {
client: self.client.clone(),
span: self.span.clone(),
user_agent: self.user_agent.clone(),
}
}
}
impl<B> fmt::Debug for HttpClient<B> {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
f.debug_struct("HttpClient")
.field("client", &self.client)
.field("user_agent", &self.user_agent)
.finish()
}
}
#[derive(Deserialize, Serialize, Clone, Debug)]
#[serde(deny_unknown_fields, rename_all = "snake_case", tag = "strategy")]
pub enum Auth {
Basic { user: String, password: String },
Bearer { token: String },
}
impl Auth {
/// Get basic-auth credentials encoded in the url,
/// example: http://user:password@example.com/ .
/// Remove the credentials from the url if exist.
pub fn get_and_strip_basic_auth(url: &str) -> (String, Option<Self>) {
match Self::get_and_strip(url) {
Some((url, auth)) => (url, Some(auth)),
None => (url.to_owned(), None),
}
}
// We can use `?` with this return type.
fn get_and_strip(url: &str) -> Option<(String, Self)> {
let mut url = url::Url::parse(url).ok()?;
let user = url.username();
let scheme = url.scheme();
if !user.is_empty() && (scheme == "http" || scheme == "https") {
let user = percent_decode(user.as_bytes())
.decode_utf8_lossy()
.into_owned();
let password = url.password().unwrap_or("");
let password = percent_decode(password.as_bytes())
.decode_utf8_lossy()
.into_owned();
url.set_username("").ok()?;
url.set_password(None).ok()?;
Some((url.to_string(), Auth::Basic { user, password }))
} else {
None
}
}
pub fn apply<B>(&self, req: &mut Request<B>) {
self.apply_headers_map(req.headers_mut())
}
pub fn apply_builder(&self, mut builder: Builder) -> Builder {
if let Some(map) = builder.headers_mut() {
self.apply_headers_map(map)
}
builder
}
pub fn apply_headers_map(&self, map: &mut HeaderMap) {
match &self {
Auth::Basic { user, password } => {
let auth = Authorization::basic(&user, &password);
map.typed_insert(auth);
}
Auth::Bearer { token } => match Authorization::bearer(&token) {
Ok(auth) => map.typed_insert(auth),
Err(error) => error!(message = "Invalid bearer token.", token = %token, %error),
},
}
}
}
#[cfg(test)]
mod tests {
use super::Auth;
use http::HeaderMap;
fn test_basic_auth(url: &str) -> (String, Option<String>) {
let (url, auth) = Auth::get_and_strip_basic_auth(url);
(
url,
auth.map(|auth| {
let mut map = HeaderMap::new();
auth.apply_headers_map(&mut map);
map["authorization"].to_str().unwrap().to_owned()
}),
)
}
#[test]
fn basic_auth_url() {
assert_eq!(
test_basic_auth("http://user:pass@example.com"),
(
"http://example.com/".to_owned(),
Some(format!("Basic {}", base64::encode("user:pass")))
)
);
// special character
assert_eq!(
test_basic_auth("http://user:pass;@example.com"),
(
"http://example.com/".to_owned(),
Some(format!("Basic {}", base64::encode("user:pass;")))
)
);
// no password
assert_eq!(
test_basic_auth("http://user@example.com"),
(
"http://example.com/".to_owned(),
Some(format!("Basic {}", base64::encode("user:")))
)
);
assert_eq!(
test_basic_auth("http://example.com:8080/test"),
("http://example.com:8080/test".to_owned(), None)
);
assert_eq!(
test_basic_auth("mailto:admin@example.com"),
("mailto:admin@example.com".to_owned(), None)
);
assert_eq!(test_basic_auth("/test"), ("/test".to_owned(), None));
// url without protocol is not supported
assert_eq!(
test_basic_auth("user:pass@example.com/test"),
("user:pass@example.com/test".to_owned(), None)
);
assert_eq!(
test_basic_auth("ftp://user:pass@example.com"),
("ftp://user:pass@example.com".to_owned(), None)
);
}
}