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Try to clean up code and to fix WebSocket problems

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This commit is contained in:
Alex 2022-05-06 12:21:15 +02:00
parent 6383d98772
commit 8c6114c3d3
Signed by untrusted user: lx
GPG key ID: 0E496D15096376BE
3 changed files with 60 additions and 43 deletions
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27
src/https.rs
View file

@ -194,25 +194,24 @@ async fn handle(
handle_error(reverse_proxy::call(remote_addr.ip(), &to_addr, req).await)
};
// Do further processing (compression, additionnal headers) only for 2xx responses
if !response.status().is_success() {
return Ok(response);
}
if response.status().is_success() {
// (TODO: maybe we want to add these headers even if it's not a success?)
for (header, value) in proxy_to.add_headers.iter() {
response.headers_mut().insert(
HeaderName::from_bytes(header.as_bytes())?,
HeaderValue::from_str(value)?,
);
}
trace!("Response: {:?}", response);
info!("{} {} {}", method, response.status().as_u16(), uri);
}
if https_config.enable_compression {
try_compress(response, method, accept_encoding, &https_config).await
} else {
response =
try_compress(response, method.clone(), accept_encoding, &https_config).await?
};
trace!("Final response: {:?}", response);
info!("{} {} {}", method, response.status().as_u16(), uri);
Ok(response)
}
} else {
debug!("{}{} -> NOT FOUND", host, path);
info!("{} 404 {}", method, uri);
@ -240,10 +239,14 @@ async fn try_compress(
https_config: &HttpsConfig,
) -> Result<Response<Body>> {
// Don't bother compressing successfull responses for HEAD and PUT (they should have an empty body)
// Don't compress partial content, that would be wierd
// If already compressed, return as is
// Don't compress partial content as it causes issues
// Don't bother compressing non-2xx results
// Don't compress Upgrade responses (e.g. websockets)
// Don't compress responses that are already compressed
if (response.status().is_success() && (method == Method::HEAD || method == Method::PUT))
|| response.status() == StatusCode::PARTIAL_CONTENT
|| !response.status().is_success()
|| response.headers().get(header::CONNECTION) == Some(&HeaderValue::from_static("Upgrade"))
|| response.headers().get(header::CONTENT_ENCODING).is_some()
{
return Ok(response);

54
src/reverse_proxy.rs
View file

@ -48,9 +48,19 @@ fn remove_hop_headers(headers: &HeaderMap<HeaderValue>) -> HeaderMap<HeaderValue
result
}
fn create_proxied_response<B>(mut response: Response<B>) -> Response<B> {
*response.headers_mut() = remove_hop_headers(response.headers());
response
fn copy_upgrade_headers(
old_headers: &HeaderMap<HeaderValue>,
new_headers: &mut HeaderMap<HeaderValue>,
) -> Result<()> {
if let Some(conn) = old_headers.get(header::CONNECTION) {
if conn.to_str()?.to_lowercase() == "upgrade" {
if let Some(upgrade) = old_headers.get(header::UPGRADE) {
new_headers.insert(header::CONNECTION, "Upgrade".try_into()?);
new_headers.insert(header::UPGRADE, upgrade.clone());
}
}
}
Ok(())
}
fn forward_uri<B>(forward_url: &str, req: &Request<B>) -> Result<Uri> {
@ -72,12 +82,13 @@ fn create_proxied_request<B>(
.uri(forward_uri(forward_url, &request)?)
.version(hyper::Version::HTTP_11);
let headers = builder.headers_mut().unwrap();
let old_headers = request.headers();
let new_headers = builder.headers_mut().unwrap();
*headers = remove_hop_headers(request.headers());
*new_headers = remove_hop_headers(old_headers);
// If request does not have host header, add it from original URI authority
if let header::Entry::Vacant(entry) = headers.entry(header::HOST) {
if let header::Entry::Vacant(entry) = new_headers.entry(header::HOST) {
if let Some(authority) = request.uri().authority() {
entry.insert(authority.as_str().parse()?);
}
@ -86,7 +97,7 @@ fn create_proxied_request<B>(
// Concatenate cookie headers into single header
// (HTTP/2 allows several cookie headers, but we are proxying to HTTP/1.1 that does not)
let mut cookie_concat = vec![];
for cookie in headers.get_all(header::COOKIE) {
for cookie in new_headers.get_all(header::COOKIE) {
if !cookie_concat.is_empty() {
cookie_concat.extend(b"; ");
}
@ -94,12 +105,12 @@ fn create_proxied_request<B>(
}
if !cookie_concat.is_empty() {
// insert clears the old value of COOKIE and inserts the concatenated version instead
headers.insert(header::COOKIE, cookie_concat.try_into()?);
new_headers.insert(header::COOKIE, cookie_concat.try_into()?);
}
// Add forwarding information in the headers
let x_forwarded_for_header_name = "x-forwarded-for";
match headers.entry(x_forwarded_for_header_name) {
match new_headers.entry(x_forwarded_for_header_name) {
header::Entry::Vacant(entry) => {
entry.insert(client_ip.to_string().parse()?);
}
@ -110,24 +121,27 @@ fn create_proxied_request<B>(
}
}
headers.insert(
new_headers.insert(
HeaderName::from_bytes(b"x-forwarded-proto")?,
"https".try_into()?,
);
// Proxy upgrade requests properly
if let Some(conn) = request.headers().get(header::CONNECTION) {
if conn.to_str()?.to_lowercase() == "upgrade" {
if let Some(upgrade) = request.headers().get(header::UPGRADE) {
headers.insert(header::CONNECTION, "Upgrade".try_into()?);
headers.insert(header::UPGRADE, upgrade.clone());
}
}
}
copy_upgrade_headers(old_headers, new_headers)?;
Ok(builder.body(request.into_body())?)
}
fn create_proxied_response<B>(mut response: Response<B>) -> Result<Response<B>> {
let old_headers = response.headers();
let mut new_headers = remove_hop_headers(old_headers);
copy_upgrade_headers(old_headers, &mut new_headers)?;
*response.headers_mut() = new_headers;
Ok(response)
}
pub async fn call(
client_ip: IpAddr,
forward_uri: &str,
@ -146,7 +160,7 @@ pub async fn call(
trace!("Inner response: {:?}", response);
let proxied_response = create_proxied_response(response);
let proxied_response = create_proxied_response(response)?;
Ok(proxied_response)
}
@ -173,7 +187,7 @@ pub async fn call_https(
trace!("Inner response (HTTPS): {:?}", response);
let proxied_response = create_proxied_response(response);
let proxied_response = create_proxied_response(response)?;
Ok(proxied_response)
}