use super::{Proxy, ProxyContext, ProxyDB, ProxyFilter, ProxyQueryPredicate};
use rama_core::error::BoxErrorExt as _;
use rama_core::{
Layer, Service,
error::{BoxError, ErrorContext, ErrorExt},
extensions::{Extensions, ExtensionsRef},
};
use rama_net::{
Protocol, TransportProtocolInputExt,
client::{ProxyRoute, ProxyRoutes},
transport::TransportProtocol,
user::ProxyCredential,
};
use rama_utils::collections::NonEmptyVec;
use rama_utils::macros::define_inner_service_accessors;
use std::{fmt, num::NonZeroUsize};
/// Default maximum number of proxy candidates published for one query.
pub const DEFAULT_PROXY_DB_MAX_PROXIES: NonZeroUsize = NonZeroUsize::new(5).unwrap();
/// A [`Service`] which resolves proxy candidates from the given input `Extensions`.
///
/// Depending on the [`ProxyFilterMode`] the selection proxies might be optional,
/// or use the default [`ProxyFilter`] in case none is defined.
///
/// A predicate can be used to provide additional filtering on the found proxies,
/// that otherwise did match the used [`ProxyFilter`].
///
/// By default up to [`DEFAULT_PROXY_DB_MAX_PROXIES`] matches are published as
/// [`ProxyRoutes`]. Each route carries its corresponding [`Proxy`] and proxy ID
/// as route-specific extensions, so only the successful connection attempt
/// inherits them. Legacy single-proxy mode inserts one singular [`ProxyRoute`]
/// and publishes its proxy metadata after the inner service succeeds.
///
/// See [the crate docs](crate) for examples and more info on the usage of this service.
///
/// [`Proxy`]: crate::Proxy
#[derive(Debug, Clone)]
pub struct ProxyDBService<S, D, P, F> {
inner: S,
db: D,
mode: ProxyFilterMode,
predicate: P,
username_formatter: F,
max_proxies: Option<NonZeroUsize>,
overwrite_proxy: bool,
single_proxy: bool,
}
#[derive(Debug, Clone, Default)]
/// The modus operandi to decide how to deal with a missing [`ProxyFilter`] in the input `Extensions`
/// when selecting a [`Proxy`] from the [`ProxyDB`].
///
/// More advanced behaviour can be achieved by combining one of these modi
/// with another (custom) layer prepending the parent.
pub enum ProxyFilterMode {
#[default]
/// The [`ProxyFilter`] is optional, and if not present, no proxy is selected.
Optional,
/// The [`ProxyFilter`] is optional, and if not present, the default [`ProxyFilter`] is used.
Default,
/// The [`ProxyFilter`] is required, and if not present, an error is returned.
Required,
/// The [`ProxyFilter`] is optional, and if not present, the provided fallback [`ProxyFilter`] is used.
Fallback(ProxyFilter),
}
impl<S, D> ProxyDBService<S, D, bool, ()> {
/// Create a new [`ProxyDBService`] with the given inner [`Service`] and [`ProxyDB`].
pub const fn new(inner: S, db: D) -> Self {
Self {
inner,
db,
mode: ProxyFilterMode::Optional,
predicate: true,
username_formatter: (),
max_proxies: Some(DEFAULT_PROXY_DB_MAX_PROXIES),
overwrite_proxy: false,
single_proxy: false,
}
}
}
impl<S, D, P, F> ProxyDBService<S, D, P, F> {
rama_utils::macros::generate_set_and_with! {
/// Limit the number of proxy candidates published for one query.
///
/// The default is [`DEFAULT_PROXY_DB_MAX_PROXIES`]. Use
/// [`Self::without_max_proxies`] for an unbounded query.
pub fn max_proxies(mut self, max_proxies: Option<NonZeroUsize>) -> Self {
self.max_proxies = max_proxies;
self
}
}
rama_utils::macros::generate_set_and_with! {
/// Set a [`ProxyFilterMode`] to define the behaviour surrounding
/// [`ProxyFilter`] usage, e.g. if a proxy filter is required to be available or not,
/// or what to do if it is optional and not available.
pub fn filter_mode(mut self, mode: ProxyFilterMode) -> Self {
self.mode = mode;
self
}
}
rama_utils::macros::generate_set_and_with! {
/// Select and insert only one proxy instead of publishing every match as
/// an ordered route plan. This uses the database's singular-selection
/// semantics, preserves legacy pre-fallback behaviour, and is disabled
/// by default.
pub fn single_proxy(mut self, single_proxy: bool) -> Self {
self.single_proxy = single_proxy;
self
}
}
rama_utils::macros::generate_set_and_with! {
/// Overwrite an existing singular [`ProxyRoute`] with the selected
/// proxy route or route plan. This is disabled by default in both
/// plural and singular selection modes.
pub fn overwrite_proxy(mut self, overwrite_proxy: bool) -> Self {
self.overwrite_proxy = overwrite_proxy;
self
}
}
/// Set a [`ProxyQueryPredicate`] that will be used
/// to possibly filter out proxies that according to the filters are correct,
/// but not according to the predicate.
pub fn with_select_predicate<Predicate>(
self,
p: Predicate,
) -> ProxyDBService<S, D, Predicate, F> {
ProxyDBService {
inner: self.inner,
db: self.db,
mode: self.mode,
predicate: p,
username_formatter: self.username_formatter,
max_proxies: self.max_proxies,
overwrite_proxy: self.overwrite_proxy,
single_proxy: self.single_proxy,
}
}
/// Set an optional [`UsernameFormatter`][crate::UsernameFormatter] for
/// Basic-auth proxy usernames. It is called separately for each published
/// candidate, so routing labels can depend on that proxy's metadata. Bearer
/// credentials and proxies without credentials are left unchanged.
pub fn with_username_formatter<Formatter>(
self,
f: Formatter,
) -> ProxyDBService<S, D, P, Formatter> {
ProxyDBService {
inner: self.inner,
db: self.db,
mode: self.mode,
predicate: self.predicate,
username_formatter: f,
max_proxies: self.max_proxies,
overwrite_proxy: self.overwrite_proxy,
single_proxy: self.single_proxy,
}
}
define_inner_service_accessors!();
}
#[derive(Debug)]
struct PreparedProxy {
proxy: Proxy,
route: ProxyRoute,
}
fn prepare_proxy<F: UsernameFormatter>(
formatter: &F,
proxy: Proxy,
filter: &ProxyFilter,
transport_protocol: TransportProtocol,
extensions: &Extensions,
) -> Result<PreparedProxy, BoxError> {
let mut proxy_address = proxy.address.clone();
proxy_address.credential = proxy_address
.credential
.take()
.map(|credential| {
Ok::<_, BoxError>(match credential {
ProxyCredential::Basic(ref basic) => {
match formatter.fmt_username(&proxy, filter, basic.username(), extensions) {
Some(username) => ProxyCredential::Basic(
basic.clone_with_new_username(
username
.try_into()
.context("returned formatted username is invalid")?,
),
),
None => credential,
}
}
ProxyCredential::Bearer(_) => credential,
})
})
.transpose()?;
if proxy_address.protocol.is_none() {
proxy_address.protocol = match transport_protocol {
TransportProtocol::Udp => {
if proxy.socks5 {
Some(Protocol::SOCKS5)
} else if proxy.socks5h {
Some(Protocol::SOCKS5H)
} else {
return Err(BoxError::from_static_str(
"selected udp proxy does not have a valid protocol available (db bug?!)",
));
}
}
TransportProtocol::Tcp => match proxy_address.address.port {
Protocol::HTTP_DEFAULT_PORT | Protocol::HTTP_ALT_PORT if proxy.http => {
Some(Protocol::HTTP)
}
Protocol::HTTPS_DEFAULT_PORT | Protocol::HTTPS_ALT_PORT if proxy.https => {
Some(Protocol::HTTPS)
}
_ => {
if proxy.socks5 {
Some(Protocol::SOCKS5)
} else if proxy.socks5h {
Some(Protocol::SOCKS5H)
} else if proxy.http {
Some(Protocol::HTTP)
} else if proxy.https {
Some(Protocol::HTTPS)
} else {
return Err(BoxError::from_static_str(
"selected tcp proxy does not have a valid protocol available (db bug?!)",
));
}
}
},
};
}
Ok(PreparedProxy {
proxy,
route: ProxyRoute::Proxy(proxy_address),
})
}
impl<S, D, P, F, Input> Service<Input> for ProxyDBService<S, D, P, F>
where
S: Service<Input, Error: Into<BoxError> + Send + Sync + 'static>,
D: ProxyDB<Error: Into<BoxError> + Send + Sync + 'static>,
P: ProxyQueryPredicate,
F: UsernameFormatter,
Input: TransportProtocolInputExt + ExtensionsRef + Send + 'static,
{
type Output = S::Output;
type Error = BoxError;
async fn serve(&self, input: Input) -> Result<Self::Output, Self::Error> {
if !self.overwrite_proxy
&& (input.extensions().contains::<ProxyRoute>()
|| input.extensions().contains::<ProxyRoutes>())
{
return self.inner.serve(input).await.into_box_error();
}
let maybe_filter = match self.mode {
ProxyFilterMode::Optional => input.extensions().get_ref::<ProxyFilter>().cloned(),
ProxyFilterMode::Default => Some(
if let Some(stored) = input.extensions().get_ref::<ProxyFilter>() {
stored.clone()
} else {
input.extensions().insert(ProxyFilter::default());
ProxyFilter::default()
},
),
ProxyFilterMode::Required => Some(
input
.extensions()
.get_ref::<ProxyFilter>()
.cloned()
.context("missing proxy filter")?,
),
ProxyFilterMode::Fallback(ref filter) => Some(
if let Some(stored) = input.extensions().get_ref::<ProxyFilter>() {
stored.clone()
} else {
input.extensions().insert(filter.clone());
filter.clone()
},
),
};
let Some(filter) = maybe_filter else {
return self.inner.serve(input).await.into_box_error();
};
let transport_protocol = input.transport_protocol().unwrap_or(TransportProtocol::Tcp);
let proxy_ctx = ProxyContext {
protocol: transport_protocol,
};
let mut proxies = if self.single_proxy {
self.db
.get_proxy_if(proxy_ctx, filter.clone(), self.predicate.clone())
.await
.map(NonEmptyVec::new)
} else {
self.db
.get_proxies_if(
proxy_ctx,
filter.clone(),
self.predicate.clone(),
self.max_proxies,
)
.await
}
.map_err(|err| {
ProxySelectError {
inner: err.into(),
filter: filter.clone(),
}
.into_box_error()
})?;
if let Some(max_proxies) = self.max_proxies {
proxies.truncate(max_proxies);
}
let candidates = proxies.try_map(|proxy| {
prepare_proxy(
&self.username_formatter,
proxy,
&filter,
transport_protocol,
input.extensions(),
)
})?;
let selected_proxy = if self.single_proxy {
input.extensions().insert(candidates.head.route.clone());
Some((input.extensions().clone(), candidates.head.proxy.clone()))
} else {
let routes = (&candidates)
.into_iter()
.map(|candidate| {
let extensions = Extensions::new();
extensions.insert(super::ProxyID::from(candidate.proxy.id.clone()));
extensions.insert(candidate.proxy.clone());
(candidate.route.clone(), extensions)
})
.collect::<ProxyRoutes>();
input.extensions().insert(routes);
None
};
let output = self.inner.serve(input).await.into_box_error()?;
if let Some((extensions, proxy)) = selected_proxy {
extensions.insert(super::ProxyID::from(proxy.id.clone()));
extensions.insert(proxy);
}
Ok(output)
}
}
#[derive(Debug)]
struct ProxySelectError {
inner: BoxError,
filter: ProxyFilter,
}
impl fmt::Display for ProxySelectError {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
write!(
f,
"proxy select error ({}) for filter: {:?}",
self.inner, self.filter
)
}
}
impl std::error::Error for ProxySelectError {
fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
Some(self.inner.source().unwrap_or_else(|| self.inner.as_ref()))
}
}
/// A [`Layer`] which wraps an inner [`Service`] to resolve proxy candidates
/// based on the input extensions and publish route-specific proxy metadata.
///
/// See [the crate docs](crate) for examples and more info on the usage of this service.
#[derive(Debug, Clone)]
pub struct ProxyDBLayer<D, P, F> {
db: D,
mode: ProxyFilterMode,
predicate: P,
username_formatter: F,
max_proxies: Option<NonZeroUsize>,
overwrite_proxy: bool,
single_proxy: bool,
}
impl<D> ProxyDBLayer<D, bool, ()> {
/// Create a new [`ProxyDBLayer`] with the given [`ProxyDB`].
pub const fn new(db: D) -> Self {
Self {
db,
mode: ProxyFilterMode::Optional,
predicate: true,
username_formatter: (),
max_proxies: Some(DEFAULT_PROXY_DB_MAX_PROXIES),
overwrite_proxy: false,
single_proxy: false,
}
}
}
impl<D, P, F> ProxyDBLayer<D, P, F> {
rama_utils::macros::generate_set_and_with! {
/// Limit the number of proxy candidates published for one query.
///
/// The default is [`DEFAULT_PROXY_DB_MAX_PROXIES`]. Use
/// [`Self::without_max_proxies`] for an unbounded query.
pub fn max_proxies(mut self, max_proxies: Option<NonZeroUsize>) -> Self {
self.max_proxies = max_proxies;
self
}
}
rama_utils::macros::generate_set_and_with! {
/// Set a [`ProxyFilterMode`] to define the behaviour surrounding
/// [`ProxyFilter`] usage, e.g. if a proxy filter is required to be available or not,
/// or what to do if it is optional and not available.
pub fn filter_mode(mut self, mode: ProxyFilterMode) -> Self {
self.mode = mode;
self
}
}
rama_utils::macros::generate_set_and_with! {
/// Select and insert only one proxy instead of publishing every match as
/// an ordered route plan. This uses the database's singular-selection
/// semantics, preserves legacy pre-fallback behaviour, and is disabled
/// by default.
pub fn single_proxy(mut self, single_proxy: bool) -> Self {
self.single_proxy = single_proxy;
self
}
}
rama_utils::macros::generate_set_and_with! {
/// Overwrite an existing singular [`ProxyRoute`] with the selected
/// proxy route or route plan. This is disabled by default in both
/// plural and singular selection modes.
pub fn overwrite_proxy(mut self, overwrite_proxy: bool) -> Self {
self.overwrite_proxy = overwrite_proxy;
self
}
}
/// Set a [`ProxyQueryPredicate`] that will be used
/// to possibly filter out proxies that according to the filters are correct,
/// but not according to the predicate.
#[must_use]
pub fn with_select_predicate<Predicate>(self, p: Predicate) -> ProxyDBLayer<D, Predicate, F> {
ProxyDBLayer {
db: self.db,
mode: self.mode,
predicate: p,
username_formatter: self.username_formatter,
max_proxies: self.max_proxies,
overwrite_proxy: self.overwrite_proxy,
single_proxy: self.single_proxy,
}
}
/// Set an optional [`UsernameFormatter`][crate::UsernameFormatter] for
/// Basic-auth proxy usernames. It is called separately for each published
/// candidate, so routing labels can depend on that proxy's metadata. Bearer
/// credentials and proxies without credentials are left unchanged.
#[must_use]
pub fn with_username_formatter<Formatter>(self, f: Formatter) -> ProxyDBLayer<D, P, Formatter> {
ProxyDBLayer {
db: self.db,
mode: self.mode,
predicate: self.predicate,
username_formatter: f,
max_proxies: self.max_proxies,
overwrite_proxy: self.overwrite_proxy,
single_proxy: self.single_proxy,
}
}
}
impl<S, D, P, F> Layer<S> for ProxyDBLayer<D, P, F>
where
D: Clone,
P: Clone,
F: Clone,
{
type Service = ProxyDBService<S, D, P, F>;
fn layer(&self, inner: S) -> Self::Service {
ProxyDBService {
inner,
db: self.db.clone(),
mode: self.mode.clone(),
predicate: self.predicate.clone(),
username_formatter: self.username_formatter.clone(),
max_proxies: self.max_proxies,
overwrite_proxy: self.overwrite_proxy,
single_proxy: self.single_proxy,
}
}
fn into_layer(self, inner: S) -> Self::Service {
ProxyDBService {
inner,
db: self.db,
mode: self.mode,
predicate: self.predicate,
username_formatter: self.username_formatter,
max_proxies: self.max_proxies,
overwrite_proxy: self.overwrite_proxy,
single_proxy: self.single_proxy,
}
}
}
/// Formats Basic-auth proxy usernames, for example to add routing labels used
/// by an upstream proxy router.
///
/// The formatter is invoked independently for every proxy candidate. It is not
/// invoked for bearer credentials or proxies without credentials.
pub trait UsernameFormatter: Send + Sync + 'static {
/// Format the username based on the root properties of the given proxy.
fn fmt_username(
&self,
proxy: &Proxy,
filter: &ProxyFilter,
username: &str,
extensions: &Extensions,
) -> Option<String>;
}
impl UsernameFormatter for () {
fn fmt_username(
&self,
_proxy: &Proxy,
_filter: &ProxyFilter,
_username: &str,
_extensions: &Extensions,
) -> Option<String> {
None
}
}
impl<F> UsernameFormatter for F
where
F: Fn(&Proxy, &ProxyFilter, &str) -> Option<String> + Send + Sync + 'static,
{
fn fmt_username(
&self,
proxy: &Proxy,
filter: &ProxyFilter,
username: &str,
_extensions: &Extensions,
) -> Option<String> {
(self)(proxy, filter, username)
}
}
#[cfg(test)]
mod tests {
use super::*;
#[cfg(feature = "memory-db")]
use crate::MemoryProxyDB;
use crate::Proxy;
#[cfg(all(feature = "memory-db", feature = "csv"))]
use crate::{ProxyCsvRowReader, StringFilter};
#[cfg(all(feature = "memory-db", feature = "csv"))]
use itertools::Itertools;
use rama_core::{ServiceInput, extensions::ExtensionsRef, service::service_fn};
use rama_http_types::{Body, Request, Version};
use rama_net::{
Protocol,
address::{HostWithPort, ProxyAddress},
asn::Asn,
client::{
ConnectRequest, ConnectionError, ConnectionErrorKind, EstablishedClientConnection,
ProxyRoute, ProxyRouteIndex, ProxyRoutesConnector,
},
};
use rama_utils::str::non_empty_str;
use std::{
convert::Infallible,
str::FromStr,
sync::{
Arc,
atomic::{AtomicUsize, Ordering},
},
};
fn selected_proxy_address(input: &impl ExtensionsRef) -> Option<&ProxyAddress> {
input
.extensions()
.get_ref::<ProxyRoute>()
.and_then(ProxyRoute::proxy_address)
}
fn test_proxy(id: &str, address: &str) -> Proxy {
Proxy {
id: id.try_into().unwrap(),
address: address.parse().unwrap(),
tcp: true,
udp: false,
http: true,
https: false,
socks5: false,
socks5h: false,
datacenter: true,
residential: false,
mobile: false,
pool_id: None,
continent: None,
country: None,
state: None,
city: None,
carrier: None,
asn: None,
}
}
fn inferred_protocol(port: u16, capabilities: (bool, bool, bool, bool)) -> Protocol {
let (http, https, socks5, socks5h) = capabilities;
let mut proxy = test_proxy("inferred", &format!("proxy.example:{port}"));
proxy.http = http;
proxy.https = https;
proxy.socks5 = socks5;
proxy.socks5h = socks5h;
prepare_proxy(
&(),
proxy,
&ProxyFilter::default(),
TransportProtocol::Tcp,
&Extensions::new(),
)
.unwrap()
.route
.proxy_address()
.unwrap()
.protocol
.clone()
.unwrap()
}
#[test]
fn known_ports_prefer_only_supported_protocols() {
for (port, capabilities, expected) in [
(
Protocol::HTTP_DEFAULT_PORT,
(true, false, true, false),
Protocol::HTTP,
),
(
Protocol::HTTP_ALT_PORT,
(false, false, true, false),
Protocol::SOCKS5,
),
(
Protocol::HTTPS_DEFAULT_PORT,
(false, true, true, false),
Protocol::HTTPS,
),
(
Protocol::HTTPS_ALT_PORT,
(false, false, true, false),
Protocol::SOCKS5,
),
(
Protocol::SOCKS5_DEFAULT_PORT,
(false, false, true, true),
Protocol::SOCKS5,
),
(
Protocol::SOCKS5_DEFAULT_PORT,
(false, false, false, true),
Protocol::SOCKS5H,
),
] {
assert_eq!(
inferred_protocol(port, capabilities),
expected,
"port {port}"
);
}
}
#[derive(Debug, Clone)]
struct OrderedProxyDB(NonEmptyVec<Proxy>);
impl ProxyDB for OrderedProxyDB {
type Error = BoxError;
async fn get_proxies_if(
&self,
_ctx: ProxyContext,
_filter: ProxyFilter,
predicate: impl ProxyQueryPredicate,
limit: Option<NonZeroUsize>,
) -> Result<NonEmptyVec<Proxy>, Self::Error> {
NonEmptyVec::collect(
(&self.0)
.into_iter()
.filter(|proxy| predicate.execute(proxy))
.take(limit.map(NonZeroUsize::get).unwrap_or(usize::MAX))
.cloned(),
)
.context("ordered test proxy db has no matching proxies")
}
}
#[tokio::test]
async fn default_mode_retries_candidates_and_records_selected_proxy() {
let first = test_proxy("first", "first:secret@a.example:8080");
let mut second = test_proxy("second", "second:secret@b.example:1080");
second.http = false;
second.socks5 = true;
let db = OrderedProxyDB(NonEmptyVec::from((first, vec![second.clone()])));
let attempts = Arc::new(AtomicUsize::new(0));
let inner = service_fn({
let attempts = attempts.clone();
move |input: ConnectRequest| {
let attempts = attempts.clone();
async move {
let route = input.extensions().get_ref::<ProxyRoute>().unwrap();
let proxy_address = route.proxy_address().unwrap();
let selected = input.extensions().get_ref::<Proxy>().unwrap();
let selected_id = input.extensions().get_ref::<crate::ProxyID>().unwrap();
let attempt = attempts.fetch_add(1, Ordering::SeqCst);
if attempt == 0 {
assert_eq!(selected.id, "first");
assert_eq!(selected_id.as_str(), "first");
assert_eq!(
proxy_address.to_string(),
"http://first-first:secret@a.example:8080"
);
Err(ConnectionError::transport(
BoxError::from_static_str("first proxy unavailable"),
ConnectionErrorKind::Unavailable,
))
} else {
assert_eq!(attempt, 1);
assert_eq!(selected.id, "second");
assert_eq!(selected_id.as_str(), "second");
assert_eq!(
proxy_address.to_string(),
"socks5://second-second:secret@b.example:1080"
);
Ok(EstablishedClientConnection {
input,
conn: ServiceInput::new(()),
})
}
}
}
});
let service = ProxyDBLayer::new(db)
.with_filter_mode(ProxyFilterMode::Default)
.with_username_formatter(|proxy: &Proxy, _filter: &ProxyFilter, username: &str| {
Some(format!("{username}-{}", proxy.id))
})
.into_layer(ProxyRoutesConnector::new(inner));
let input = ConnectRequest::new("www.example.com:443".parse().unwrap());
let established = service.serve(input).await.unwrap();
assert_eq!(attempts.load(Ordering::SeqCst), 2);
assert_eq!(
established
.input
.extensions()
.get_ref::<ProxyRouteIndex>()
.copied()
.map(ProxyRouteIndex::get),
Some(1)
);
let selected = established.input.extensions().get_ref::<Proxy>().unwrap();
assert_eq!(selected.id, second.id);
assert_eq!(selected.address, second.address);
assert_eq!(selected.socks5, second.socks5);
assert_eq!(
established
.input
.extensions()
.get_ref::<crate::ProxyID>()
.map(crate::ProxyID::as_str),
Some("second")
);
assert!(established.conn.extensions().get_ref::<Proxy>().is_none());
assert!(
established
.conn
.extensions()
.get_ref::<crate::ProxyID>()
.is_none()
);
}
#[tokio::test]
async fn default_mode_accepts_output_without_extensions() {
let first = test_proxy("first", "a.example:8080");
let second = test_proxy("second", "b.example:8080");
let db = OrderedProxyDB(NonEmptyVec::from((first, vec![second])));
let inner = service_fn(|input: ConnectRequest| async move {
let routes = input.extensions().get_ref::<ProxyRoutes>().unwrap();
assert_eq!(routes.as_slice().len(), 2);
assert_eq!(
routes
.route_extensions(1)
.and_then(|extensions| extensions.get_ref::<crate::ProxyID>())
.map(crate::ProxyID::as_str),
Some("second")
);
Ok::<_, Infallible>(42_u8)
});
let service = ProxyDBLayer::new(db)
.with_filter_mode(ProxyFilterMode::Default)
.into_layer(inner);
let input = ConnectRequest::new("www.example.com:443".parse().unwrap());
assert_eq!(service.serve(input).await.unwrap(), 42);
}
enum TestProxyLimit {
Default,
Bounded(NonZeroUsize),
Unbounded,
}
async fn attempted_proxy_count(configured_limit: TestProxyLimit) -> usize {
let proxies = (0..7)
.map(|index| {
test_proxy(
&format!("proxy-{index}"),
&format!("proxy-{index}.example:8080"),
)
})
.collect::<Vec<_>>();
let db = OrderedProxyDB(NonEmptyVec::try_from(proxies).unwrap());
let attempts = Arc::new(AtomicUsize::new(0));
let inner = service_fn({
let attempts = attempts.clone();
move |_input: ConnectRequest| {
attempts.fetch_add(1, Ordering::SeqCst);
async {
Err::<EstablishedClientConnection<ServiceInput<()>, ConnectRequest>, _>(
ConnectionError::transport(
BoxError::from_static_str("proxy unavailable"),
ConnectionErrorKind::Unavailable,
),
)
}
}
});
let layer = ProxyDBLayer::new(db).with_filter_mode(ProxyFilterMode::Default);
let layer = match configured_limit {
TestProxyLimit::Default => layer,
TestProxyLimit::Bounded(limit) => layer.with_max_proxies(limit),
TestProxyLimit::Unbounded => layer.without_max_proxies(),
};
let service = layer.into_layer(ProxyRoutesConnector::new(inner));
let _error = service
.serve(ConnectRequest::new("www.example.com:443".parse().unwrap()))
.await
.unwrap_err();
attempts.load(Ordering::SeqCst)
}
#[tokio::test]
async fn plural_mode_defaults_to_five_candidates() {
assert_eq!(attempted_proxy_count(TestProxyLimit::Default).await, 5);
}
#[tokio::test]
async fn plural_mode_candidate_limit_is_configurable_or_unbounded() {
assert_eq!(
attempted_proxy_count(TestProxyLimit::Bounded(NonZeroUsize::new(2).unwrap())).await,
2
);
assert_eq!(attempted_proxy_count(TestProxyLimit::Unbounded).await, 7);
}
#[tokio::test]
async fn route_index_correlates_duplicate_proxy_addresses() {
let first = test_proxy("first", "duplicate.example:8080");
let second = test_proxy("second", "duplicate.example:8080");
let db = OrderedProxyDB(NonEmptyVec::from((first, vec![second])));
let inner = service_fn(async |input: ConnectRequest| {
if input
.extensions()
.get_ref::<ProxyRouteIndex>()
.copied()
.map(ProxyRouteIndex::get)
== Some(0)
{
Err(ConnectionError::transport(
BoxError::from_static_str("first candidate unavailable"),
ConnectionErrorKind::Unavailable,
))
} else {
Ok(EstablishedClientConnection {
input,
conn: ServiceInput::new(()),
})
}
});
let service = ProxyDBLayer::new(db)
.with_filter_mode(ProxyFilterMode::Default)
.into_layer(ProxyRoutesConnector::new(inner));
let established = service
.serve(ConnectRequest::new("www.example.com:443".parse().unwrap()))
.await
.unwrap();
assert_eq!(
established
.input
.extensions()
.get_ref::<crate::ProxyID>()
.map(crate::ProxyID::as_str),
Some("second")
);
assert_eq!(
established
.input
.extensions()
.get_ref::<Proxy>()
.unwrap()
.id,
"second"
);
}
#[tokio::test]
async fn existing_singular_route_is_preserved_by_default_in_multi_mode() {
let db = OrderedProxyDB(NonEmptyVec::new(test_proxy(
"database",
"database.example:8080",
)));
let service = ProxyDBLayer::new(db)
.with_filter_mode(ProxyFilterMode::Default)
.into_layer(service_fn(async |input: Request| {
Ok::<_, Infallible>(input)
}));
let input = Request::builder()
.uri("https://example.com")
.body(Body::empty())
.unwrap();
input
.extensions()
.insert(ProxyRoute::Proxy("existing.example:8080".parse().unwrap()));
let output = service.serve(input).await.unwrap();
assert_eq!(
selected_proxy_address(&output).unwrap().address.to_string(),
"existing.example:8080"
);
assert!(output.extensions().get_ref::<ProxyRoutes>().is_none());
assert!(output.extensions().get_ref::<Proxy>().is_none());
assert!(output.extensions().get_ref::<crate::ProxyID>().is_none());
}
#[tokio::test]
async fn single_mode_can_opt_into_overwriting_existing_route() {
let db = OrderedProxyDB(NonEmptyVec::new(test_proxy(
"database",
"database.example:8080",
)));
let service = ProxyDBLayer::new(db)
.with_filter_mode(ProxyFilterMode::Default)
.with_single_proxy(true)
.with_overwrite_proxy(true)
.into_layer(service_fn(async |input: Request| {
Ok::<_, Infallible>(input)
}));
let input = Request::builder()
.uri("https://example.com")
.body(Body::empty())
.unwrap();
input
.extensions()
.insert(ProxyRoute::Proxy("existing.example:8080".parse().unwrap()));
let output = service.serve(input).await.unwrap();
assert_eq!(
selected_proxy_address(&output).unwrap().address.to_string(),
"database.example:8080"
);
assert_eq!(
output
.extensions()
.get_ref::<crate::ProxyID>()
.map(crate::ProxyID::as_str),
Some("database")
);
}
#[tokio::test]
async fn multi_mode_can_opt_into_overwriting_existing_route() {
let db = OrderedProxyDB(NonEmptyVec::new(test_proxy(
"database",
"database.example:8080",
)));
let inner = service_fn(async |input: ConnectRequest| {
Ok::<_, ConnectionError>(EstablishedClientConnection {
input,
conn: ServiceInput::new(()),
})
});
let service = ProxyDBLayer::new(db)
.with_filter_mode(ProxyFilterMode::Default)
.with_overwrite_proxy(true)
.into_layer(ProxyRoutesConnector::new(inner));
let input = ConnectRequest::new("www.example.com:443".parse().unwrap());
input
.extensions()
.insert(ProxyRoute::Proxy("existing.example:8080".parse().unwrap()));
let output = service.serve(input).await.unwrap();
assert_eq!(
selected_proxy_address(&output.input)
.unwrap()
.address
.to_string(),
"database.example:8080"
);
assert_eq!(
output
.input
.extensions()
.get_ref::<crate::ProxyID>()
.map(crate::ProxyID::as_str),
Some("database")
);
}
#[tokio::test]
async fn optional_mode_without_filter_adds_no_proxy_state() {
let db = OrderedProxyDB(NonEmptyVec::new(test_proxy(
"database",
"database.example:8080",
)));
let service = ProxyDBLayer::new(db).into_layer(service_fn(async |input: Request| {
Ok::<_, Infallible>(input)
}));
let input = Request::builder()
.uri("https://example.com")
.body(Body::empty())
.unwrap();
let output = service.serve(input).await.unwrap();
assert!(output.extensions().get_ref::<ProxyRoute>().is_none());
assert!(output.extensions().get_ref::<ProxyRoutes>().is_none());
assert!(output.extensions().get_ref::<Proxy>().is_none());
assert!(output.extensions().get_ref::<crate::ProxyID>().is_none());
}
#[tokio::test]
async fn plural_db_miss_does_not_call_inner_or_fall_back_direct() {
let inner_calls = Arc::new(AtomicUsize::new(0));
let service = ProxyDBLayer::new(())
.with_filter_mode(ProxyFilterMode::Default)
.into_layer(service_fn({
let inner_calls = inner_calls.clone();
move |input: Request| {
inner_calls.fetch_add(1, Ordering::SeqCst);
async move { Ok::<_, Infallible>(input) }
}
}));
let input = Request::builder()
.uri("https://example.com")
.body(Body::empty())
.unwrap();
service.serve(input).await.unwrap_err();
assert_eq!(inner_calls.load(Ordering::SeqCst), 0);
}
#[tokio::test]
#[cfg(feature = "memory-db")]
async fn test_proxy_db_default_happy_path_example() {
let db = MemoryProxyDB::try_from_iter([
Proxy {
id: non_empty_str!("42"),
address: ProxyAddress::from_str("12.34.12.34:8080").unwrap(),
tcp: true,
udp: true,
http: true,
https: true,
socks5: true,
socks5h: true,
datacenter: false,
residential: true,
mobile: true,
pool_id: None,
continent: Some("*".into()),
country: Some("*".into()),
state: Some("*".into()),
city: Some("*".into()),
carrier: Some("*".into()),
asn: Some(Asn::unspecified()),
},
Proxy {
id: non_empty_str!("100"),
address: ProxyAddress::from_str("12.34.12.35:8080").unwrap(),
tcp: true,
udp: false,
http: true,
https: true,
socks5: false,
socks5h: false,
datacenter: true,
residential: false,
mobile: false,
pool_id: None,
continent: Some("americas".into()),
country: Some("US".into()),
state: None,
city: None,
carrier: None,
asn: Some(Asn::unspecified()),
},
])
.unwrap();
let service = ProxyDBLayer::new(Arc::new(db))
.with_filter_mode(ProxyFilterMode::Default)
.into_layer(ProxyRoutesConnector::new(service_fn(
async |req: ConnectRequest| {
Ok::<_, ConnectionError>(EstablishedClientConnection {
input: req,
conn: ServiceInput::new(()),
})
},
)));
let req = ConnectRequest::new("www.example.com:443".parse().unwrap())
.with_application_protocol(Protocol::HTTPS);
req.extensions().insert(ProxyFilter {
country: Some(vec!["BE".into()]),
mobile: Some(true),
residential: Some(true),
..Default::default()
});
let established = service.serve(req).await.unwrap();
let proxy_address = selected_proxy_address(&established.input).unwrap();
assert_eq!(
proxy_address.address,
HostWithPort::from(([12, 34, 12, 34], 8080))
);
assert_eq!(
established
.input
.extensions()
.get_ref::<Proxy>()
.map(|p| p.id.as_ref()),
Some("42")
);
assert_eq!(
established
.input
.extensions()
.get_ref::<crate::ProxyID>()
.map(crate::ProxyID::as_str),
Some("42")
);
}
#[tokio::test]
async fn test_proxy_db_single_proxy_example() {
let proxy = Proxy {
id: non_empty_str!("42"),
address: ProxyAddress::from_str("12.34.12.34:8080").unwrap(),
tcp: true,
udp: true,
http: true,
https: true,
socks5: true,
socks5h: true,
datacenter: false,
residential: true,
mobile: true,
pool_id: None,
continent: Some("*".into()),
country: Some("*".into()),
state: Some("*".into()),
city: Some("*".into()),
carrier: Some("*".into()),
asn: Some(Asn::unspecified()),
};
let service = ProxyDBLayer::new(Arc::new(proxy))
.with_filter_mode(ProxyFilterMode::Default)
.with_single_proxy(true)
.into_layer(service_fn(async |req: Request| Ok::<_, Infallible>(req)));
let req = Request::builder()
.version(Version::HTTP_3)
.method("GET")
.uri("https://example.com")
.body(Body::empty())
.unwrap();
req.extensions().insert(ProxyFilter {
country: Some(vec!["BE".into()]),
mobile: Some(true),
residential: Some(true),
..Default::default()
});
let output = service.serve(req).await.unwrap();
let proxy_address = selected_proxy_address(&output).unwrap();
assert_eq!(
proxy_address.address,
HostWithPort::from(([12, 34, 12, 34], 8080))
);
assert!(output.extensions().get_ref::<ProxyRoutes>().is_none());
assert_eq!(
output
.extensions()
.get_ref::<Proxy>()
.map(|p| p.id.as_ref()),
Some("42")
);
}
#[tokio::test]
async fn test_proxy_db_single_proxy_with_username_formatter() {
let proxy = Proxy {
id: non_empty_str!("42"),
address: ProxyAddress::from_str("john:secret@12.34.12.34:8080").unwrap(),
tcp: true,
udp: true,
http: true,
https: true,
socks5: true,
socks5h: true,
datacenter: false,
residential: true,
mobile: true,
pool_id: Some("routers".into()),
continent: Some("*".into()),
country: Some("*".into()),
state: Some("*".into()),
city: Some("*".into()),
carrier: Some("*".into()),
asn: Some(Asn::unspecified()),
};
let service = ProxyDBLayer::new(Arc::new(proxy))
.with_filter_mode(ProxyFilterMode::Default)
.with_single_proxy(true)
.with_username_formatter(|proxy: &Proxy, filter: &ProxyFilter, username: &str| {
if proxy
.pool_id
.as_ref()
.map(|id| id.as_ref() == "routers")
.unwrap_or_default()
{
use std::fmt::Write;
let mut output = String::new();
if let Some(countries) = filter.country.as_ref().filter(|t| !t.is_empty()) {
_ = write!(output, "country-{}", countries[0]);
}
if let Some(states) = filter.state.as_ref().filter(|t| !t.is_empty()) {
_ = write!(output, "state-{}", states[0]);
}
return (!output.is_empty()).then(|| format!("{username}-{output}"));
}
None
})
.into_layer(service_fn(async |req: Request| Ok::<_, Infallible>(req)));
let req = Request::builder()
.version(Version::HTTP_3)
.method("GET")
.uri("https://example.com")
.body(Body::empty())
.unwrap();
req.extensions().insert(ProxyFilter {
country: Some(vec!["BE".into()]),
mobile: Some(true),
residential: Some(true),
..Default::default()
});
let output = service.serve(req).await.unwrap();
let proxy_address = selected_proxy_address(&output).unwrap();
assert_eq!(
"socks5://john-country-be:secret@12.34.12.34:8080",
proxy_address.to_string()
);
}
#[tokio::test]
#[cfg(feature = "memory-db")]
async fn test_proxy_db_legacy_single_proxy_transport_layer() {
let db = MemoryProxyDB::try_from_iter([
Proxy {
id: non_empty_str!("42"),
address: ProxyAddress::from_str("12.34.12.34:8080").unwrap(),
tcp: true,
udp: true,
http: true,
https: true,
socks5: true,
socks5h: true,
datacenter: false,
residential: true,
mobile: true,
pool_id: None,
continent: Some("*".into()),
country: Some("*".into()),
state: Some("*".into()),
city: Some("*".into()),
carrier: Some("*".into()),
asn: Some(Asn::unspecified()),
},
Proxy {
id: non_empty_str!("100"),
address: ProxyAddress::from_str("12.34.12.35:8080").unwrap(),
tcp: true,
udp: false,
http: true,
https: true,
socks5: false,
socks5h: false,
datacenter: true,
residential: false,
mobile: false,
pool_id: None,
continent: Some("americas".into()),
country: Some("US".into()),
state: None,
city: None,
carrier: None,
asn: Some(Asn::unspecified()),
},
])
.unwrap();
let service = ProxyDBLayer::new(Arc::new(db))
.with_filter_mode(ProxyFilterMode::Default)
.with_single_proxy(true)
.into_layer(service_fn(async |req: ConnectRequest| {
Ok::<_, Infallible>(req)
}));
let req = ConnectRequest::new("www.example.com:443".parse().unwrap())
.with_application_protocol(Protocol::HTTPS);
req.extensions().insert(ProxyFilter {
country: Some(vec!["BE".into()]),
mobile: Some(true),
residential: Some(true),
..Default::default()
});
let output = service.serve(req).await.unwrap();
let proxy_address = selected_proxy_address(&output).unwrap();
assert_eq!(
proxy_address.address,
HostWithPort::from(([12, 34, 12, 34], 8080))
);
}
#[cfg(all(feature = "memory-db", feature = "csv"))]
const RAW_CSV_DATA: &str = include_str!("./test_proxydb_rows.csv");
#[cfg(all(feature = "memory-db", feature = "csv"))]
async fn memproxydb() -> MemoryProxyDB {
let mut reader = ProxyCsvRowReader::raw(RAW_CSV_DATA);
let mut rows = Vec::new();
while let Some(proxy) = reader.next().await.unwrap() {
rows.push(proxy);
}
MemoryProxyDB::try_from_rows(rows).unwrap()
}
#[tokio::test]
#[cfg(all(feature = "memory-db", feature = "csv"))]
async fn single_mode_preserves_existing_proxy_address_by_default() {
let db = memproxydb().await;
let service = ProxyDBLayer::new(Arc::new(db))
.with_filter_mode(ProxyFilterMode::Default)
.with_single_proxy(true)
.into_layer(service_fn(async |req: Request| Ok::<_, Infallible>(req)));
let req = Request::builder()
.version(Version::HTTP_11)
.method("GET")
.uri("http://example.com")
.body(Body::empty())
.unwrap();
req.extensions().insert(ProxyRoute::Proxy(
ProxyAddress::try_from("http://john:secret@1.2.3.4:1234").unwrap(),
));
let output = service.serve(req).await.unwrap();
let proxy_address = selected_proxy_address(&output).unwrap();
assert_eq!(proxy_address.address.to_string(), "1.2.3.4:1234");
assert!(output.extensions().get_ref::<Proxy>().is_none());
assert!(output.extensions().get_ref::<crate::ProxyID>().is_none());
}
#[tokio::test]
#[cfg(all(feature = "memory-db", feature = "csv"))]
async fn test_proxy_db_service_optional() {
let db = memproxydb().await;
let service = ProxyDBLayer::new(Arc::new(db))
.with_single_proxy(true)
.into_layer(service_fn(async |req: Request| Ok::<_, Infallible>(req)));
for (filter, expected_authority, req) in [
(
None,
None,
Request::builder()
.version(Version::HTTP_11)
.method("GET")
.uri("http://example.com")
.body(Body::empty())
.unwrap(),
),
(
Some(ProxyFilter {
id: Some(non_empty_str!("3031533634")),
..Default::default()
}),
Some("105.150.55.60:4898"),
Request::builder()
.version(Version::HTTP_11)
.method("GET")
.uri("http://example.com")
.body(Body::empty())
.unwrap(),
),
(
Some(ProxyFilter {
country: Some(vec![StringFilter::new("BE")]),
mobile: Some(true),
residential: Some(true),
..Default::default()
}),
Some("140.249.154.18:5800"),
Request::builder()
.version(Version::HTTP_3)
.method("GET")
.uri("https://example.com")
.body(Body::empty())
.unwrap(),
),
] {
if let Some(filter) = filter {
req.extensions().insert(filter);
}
let output = service.serve(req).await.unwrap();
let maybe_proxy_address = selected_proxy_address(&output);
assert_eq!(
maybe_proxy_address.map(|p| p.address.clone()),
expected_authority.map(|s| HostWithPort::try_from(s).unwrap())
);
}
}
#[tokio::test]
#[cfg(all(feature = "memory-db", feature = "csv"))]
async fn test_proxy_db_legacy_single_proxy_default_filter() {
let db = memproxydb().await;
let service = ProxyDBLayer::new(Arc::new(db))
.with_filter_mode(ProxyFilterMode::Default)
.with_single_proxy(true)
.into_layer(service_fn(async |req: Request| Ok::<_, Infallible>(req)));
for (filter, expected_addresses, req_info) in [
(
None,
"0.20.204.227:8373,104.207.92.167:9387,105.150.55.60:4898,106.213.197.28:9110,113.6.21.212:4525,115.29.251.35:5712,119.146.94.132:7851,129.204.152.130:6524,134.190.189.202:5772,136.186.95.10:7095,137.220.180.169:4929,140.249.154.18:5800,145.57.31.149:6304,151.254.135.9:6961,153.206.209.221:8696,162.97.174.152:1673,169.179.161.206:6843,171.174.56.89:5744,178.189.117.217:6496,182.34.76.182:2374,184.209.230.177:1358,193.188.239.29:3541,193.26.37.125:3780,204.168.216.113:1096,208.224.120.97:7118,209.176.177.182:4311,215.49.63.89:9458,223.234.242.63:7211,230.159.143.41:7296,233.22.59.115:1653,24.155.249.112:2645,247.118.71.100:1033,249.221.15.121:7434,252.69.242.136:4791,253.138.153.41:2640,28.139.151.127:2809,4.20.243.186:9155,42.54.35.118:6846,45.59.69.12:5934,46.247.45.238:3522,54.226.47.54:7442,61.112.212.160:3842,66.142.40.209:4251,66.171.139.181:4449,69.246.162.84:8964,75.43.123.181:7719,76.128.58.167:4797,85.14.163.105:8362,92.227.104.237:6161,97.192.206.72:6067",
(Version::HTTP_11, "GET", "http://example.com"),
),
(
Some(ProxyFilter {
country: Some(vec![StringFilter::new("BE")]),
mobile: Some(true),
residential: Some(true),
..Default::default()
}),
"140.249.154.18:5800",
(Version::HTTP_3, "GET", "https://example.com"),
),
] {
let mut seen_addresses = Vec::new();
for _ in 0..5000 {
let req = Request::builder()
.version(req_info.0)
.method(req_info.1)
.uri(req_info.2)
.body(Body::empty())
.unwrap();
if let Some(filter) = filter.clone() {
req.extensions().insert(filter);
}
let output = service.serve(req).await.unwrap();
let proxy_address = selected_proxy_address(&output).unwrap().address.to_string();
if !seen_addresses.contains(&proxy_address) {
seen_addresses.push(proxy_address);
}
}
let seen_addresses = seen_addresses.into_iter().sorted().join(",");
assert_eq!(seen_addresses, expected_addresses);
}
}
#[tokio::test]
#[cfg(all(feature = "memory-db", feature = "csv"))]
async fn test_proxy_db_legacy_single_proxy_fallback_filter() {
let db = memproxydb().await;
let service = ProxyDBLayer::new(Arc::new(db))
.with_filter_mode(ProxyFilterMode::Fallback(ProxyFilter {
datacenter: Some(true),
residential: Some(false),
mobile: Some(false),
..Default::default()
}))
.with_single_proxy(true)
.into_layer(service_fn(async |req: Request| Ok::<_, Infallible>(req)));
for (filter, expected_addresses, req_info) in [
(
None,
"113.6.21.212:4525,119.146.94.132:7851,136.186.95.10:7095,137.220.180.169:4929,247.118.71.100:1033,249.221.15.121:7434,92.227.104.237:6161",
(Version::HTTP_11, "GET", "http://example.com"),
),
(
Some(ProxyFilter {
country: Some(vec![StringFilter::new("BE")]),
mobile: Some(true),
residential: Some(true),
..Default::default()
}),
"140.249.154.18:5800",
(Version::HTTP_3, "GET", "https://example.com"),
),
] {
let mut seen_addresses = Vec::new();
for _ in 0..5000 {
let req = Request::builder()
.version(req_info.0)
.method(req_info.1)
.uri(req_info.2)
.body(Body::empty())
.unwrap();
if let Some(filter) = filter.clone() {
req.extensions().insert(filter);
}
let output = service.serve(req).await.unwrap();
let proxy_address = selected_proxy_address(&output).unwrap().address.to_string();
if !seen_addresses.contains(&proxy_address) {
seen_addresses.push(proxy_address);
}
}
let seen_addresses = seen_addresses.into_iter().sorted().join(",");
assert_eq!(seen_addresses, expected_addresses);
}
}
#[tokio::test]
#[cfg(all(feature = "memory-db", feature = "csv"))]
async fn test_proxy_db_service_required() {
let db = memproxydb().await;
let service = ProxyDBLayer::new(Arc::new(db))
.with_filter_mode(ProxyFilterMode::Required)
.with_single_proxy(true)
.into_layer(service_fn(async |req: Request| Ok::<_, Infallible>(req)));
for (filter, expected_address, req) in [
(
None,
None,
Request::builder()
.version(Version::HTTP_11)
.method("GET")
.uri("http://example.com")
.body(Body::empty())
.unwrap(),
),
(
Some(ProxyFilter {
country: Some(vec![StringFilter::new("BE")]),
mobile: Some(true),
residential: Some(true),
..Default::default()
}),
Some("140.249.154.18:5800"),
Request::builder()
.version(Version::HTTP_3)
.method("GET")
.uri("https://example.com")
.body(Body::empty())
.unwrap(),
),
(
Some(ProxyFilter {
id: Some(non_empty_str!("FooBar")),
..Default::default()
}),
None,
Request::builder()
.version(Version::HTTP_3)
.method("GET")
.uri("https://example.com")
.body(Body::empty())
.unwrap(),
),
(
Some(ProxyFilter {
id: Some(non_empty_str!("1316455915")),
country: Some(vec![StringFilter::new("BE")]),
mobile: Some(true),
residential: Some(true),
..Default::default()
}),
None,
Request::builder()
.version(Version::HTTP_3)
.method("GET")
.uri("https://example.com")
.body(Body::empty())
.unwrap(),
),
] {
if let Some(filter) = filter.clone() {
req.extensions().insert(filter);
}
let proxy_address_result = service.serve(req).await;
match expected_address {
Some(expected_address) => {
assert_eq!(
selected_proxy_address(&proxy_address_result.unwrap())
.unwrap()
.address,
HostWithPort::try_from(expected_address).unwrap()
);
}
None => {
proxy_address_result.unwrap_err();
}
}
}
}
#[tokio::test]
#[cfg(all(feature = "memory-db", feature = "csv"))]
async fn test_proxy_db_service_required_with_predicate() {
let db = memproxydb().await;
let service = ProxyDBLayer::new(Arc::new(db))
.with_filter_mode(ProxyFilterMode::Required)
.with_single_proxy(true)
.with_select_predicate(|proxy: &Proxy| proxy.mobile)
.into_layer(service_fn(async |req: Request| Ok::<_, Infallible>(req)));
for (filter, expected, req) in [
(
None,
None,
Request::builder()
.version(Version::HTTP_11)
.method("GET")
.uri("http://example.com")
.body(Body::empty())
.unwrap(),
),
(
Some(ProxyFilter {
country: Some(vec![StringFilter::new("BE")]),
mobile: Some(true),
residential: Some(true),
..Default::default()
}),
Some("140.249.154.18:5800"),
Request::builder()
.version(Version::HTTP_3)
.method("GET")
.uri("https://example.com")
.body(Body::empty())
.unwrap(),
),
(
Some(ProxyFilter {
id: Some(non_empty_str!("FooBar")),
..Default::default()
}),
None,
Request::builder()
.version(Version::HTTP_3)
.method("GET")
.uri("https://example.com")
.body(Body::empty())
.unwrap(),
),
(
Some(ProxyFilter {
id: Some(non_empty_str!("1316455915")),
country: Some(vec![StringFilter::new("BE")]),
mobile: Some(true),
residential: Some(true),
..Default::default()
}),
None,
Request::builder()
.version(Version::HTTP_3)
.method("GET")
.uri("https://example.com")
.body(Body::empty())
.unwrap(),
),
// match found, but due to custom predicate it won't check, given it is not mobile
(
Some(ProxyFilter {
id: Some(non_empty_str!("1316455915")),
..Default::default()
}),
None,
Request::builder()
.version(Version::HTTP_3)
.method("GET")
.uri("https://example.com")
.body(Body::empty())
.unwrap(),
),
] {
if let Some(filter) = filter {
req.extensions().insert(filter);
}
let proxy_result = service.serve(req).await;
match expected {
Some(expected_address) => {
assert_eq!(
selected_proxy_address(&proxy_result.unwrap())
.unwrap()
.address,
HostWithPort::try_from(expected_address).unwrap()
);
}
None => {
proxy_result.unwrap_err();
}
}
}
}
}