53 lines
1.7 KiB
Rust
53 lines
1.7 KiB
Rust
use actix_governor::KeyExtractor;
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use actix_governor::PeerIpKeyExtractor;
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use actix_governor::SimpleKeyExtractionError;
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use actix_web::HttpResponse;
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use actix_web::HttpResponseBuilder;
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use actix_web::{dev::ServiceRequest, http::header::ContentType};
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use governor::clock::{Clock, DefaultClock, QuantaInstant};
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use governor::NotUntil;
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use std::net::IpAddr;
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#[derive(Debug, Clone, Copy, PartialEq, Eq)]
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pub struct ForwardedPeerIpKeyExtractor {
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pub proxied: bool,
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}
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impl KeyExtractor for ForwardedPeerIpKeyExtractor {
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type Key = IpAddr;
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type KeyExtractionError = SimpleKeyExtractionError<&'static str>;
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fn extract(&self, req: &ServiceRequest) -> Result<Self::Key, Self::KeyExtractionError> {
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let forwarded_for = req.headers().get("x-forwarded-for");
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if self.proxied && forwarded_for.is_some() {
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read_forwareded_for(forwarded_for).map_err(SimpleKeyExtractionError::new)
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} else {
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PeerIpKeyExtractor.extract(req)
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}
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}
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fn exceed_rate_limit_response(
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&self,
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negative: &NotUntil<QuantaInstant>,
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mut response: HttpResponseBuilder,
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) -> HttpResponse {
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let wait_time = negative
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.wait_time_from(DefaultClock::default().now())
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.as_secs();
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response
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.content_type(ContentType::plaintext())
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.body(format!("too many requests, retry in {wait_time}s"))
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}
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}
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fn read_forwareded_for(
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forwarded_for: Option<&actix_web::http::header::HeaderValue>,
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) -> Result<IpAddr, &'static str> {
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forwarded_for
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.unwrap()
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.to_str()
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.map_err(|_| "x-forwarded-for contains invalid header value")?
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.parse::<IpAddr>()
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.map_err(|_| "x-forwarded-for contains invalid ip adress")
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}
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