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use axum::{body::Body, extract::ConnectInfo, http::Request, response::Response};
use chrono::Utc;
use futures::future::BoxFuture;
use http::{
header::{HeaderValue, HOST, USER_AGENT},
Extensions, HeaderMap,
};
use lazy_static::lazy_static;
use reqwest::blocking::Client;
use serde::Serialize;
use std::sync::Mutex;
use std::{
net::{IpAddr, SocketAddr},
task::{Context, Poll},
thread::spawn,
time::Instant,
};
use tower::{Layer, Service};
#[derive(Debug, Clone, Serialize)]
struct RequestData {
hostname: String,
ip_address: String,
path: String,
user_agent: String,
method: String,
response_time: u32,
status: u16,
created_at: String,
}
impl RequestData {
pub fn new(
hostname: String,
ip_address: String,
path: String,
user_agent: String,
method: String,
status: u16,
response_time: u32,
created_at: String,
) -> Self {
Self {
hostname,
ip_address,
path,
user_agent,
method,
response_time,
status,
created_at,
}
}
}
#[derive(Clone)]
pub struct Analytics {
api_key: String,
}
impl Analytics {
pub fn new(api_key: String) -> Self {
Self { api_key }
}
}
impl<S> Layer<S> for Analytics {
type Service = AnalyticsMiddleware<S>;
fn layer(&self, inner: S) -> Self::Service {
AnalyticsMiddleware {
api_key: self.api_key.clone(),
inner,
}
}
}
#[derive(Clone)]
pub struct AnalyticsMiddleware<S> {
api_key: String,
inner: S,
}
pub trait HeaderValueExt {
fn to_string(&self) -> String;
}
impl HeaderValueExt for HeaderValue {
fn to_string(&self) -> String {
self.to_str().unwrap_or_default().to_string()
}
}
fn ip_from_x_forwarded_for(headers: &HeaderMap) -> Option<IpAddr> {
headers
.get("x-forwarded-for")
.and_then(|hv| hv.to_str().ok())
.and_then(|s| {
s.split(',')
.rev()
.find_map(|s| s.trim().parse::<IpAddr>().ok())
})
}
fn ip_from_x_real_ip(headers: &HeaderMap) -> Option<IpAddr> {
headers
.get("x-real-ip")
.and_then(|hv| hv.to_str().ok())
.and_then(|s| s.parse::<IpAddr>().ok())
}
fn ip_from_connect_info(extensions: &Extensions) -> Option<IpAddr> {
extensions
.get::<ConnectInfo<SocketAddr>>()
.map(|ConnectInfo(addr)| addr.ip())
}
fn extract_ip_address(req: &Request<Body>) -> String {
let extensions = req.extensions();
let headers = req.headers();
let mut ip_address = String::new();
if let Some(val) = ip_from_x_forwarded_for(headers) {
ip_address = val.to_string();
} else if let Some(val) = ip_from_x_real_ip(headers) {
ip_address = val.to_string();
} else if let Some(val) = ip_from_connect_info(extensions) {
ip_address = val.to_string();
}
ip_address
}
lazy_static! {
static ref REQUESTS: Mutex<Vec<RequestData>> = Mutex::new(vec![]);
static ref LAST_POSTED: Mutex<Instant> = Mutex::new(Instant::now());
}
#[derive(Debug, Clone, Serialize)]
struct Payload {
api_key: String,
requests: Vec<RequestData>,
framework: String,
}
impl Payload {
pub fn new(api_key: String, requests: Vec<RequestData>) -> Self {
Self {
api_key,
requests,
framework: String::from("Axum"),
}
}
}
fn post_requests(data: Payload) {
let _ = Client::new()
.post("https://213.168.248.206/api/log-request")
.json(&data)
.send();
}
fn log_request(api_key: String, request_data: RequestData) {
REQUESTS.lock().unwrap().push(request_data);
if LAST_POSTED.lock().unwrap().elapsed().as_secs_f64() > 60.0 {
let payload = Payload::new(api_key, REQUESTS.lock().unwrap().to_vec());
REQUESTS.lock().unwrap().clear();
spawn(|| post_requests(payload));
*LAST_POSTED.lock().unwrap() = Instant::now();
}
}
impl<S> Service<Request<Body>> for AnalyticsMiddleware<S>
where
S: Service<Request<Body>, Response = Response> + Send + 'static,
S::Future: Send + 'static,
{
type Response = S::Response;
type Error = S::Error;
type Future = BoxFuture<'static, Result<Self::Response, Self::Error>>;
fn poll_ready(&mut self, cx: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
self.inner.poll_ready(cx)
}
fn call(&mut self, req: Request<Body>) -> Self::Future {
let now = Instant::now();
let api_key = self.api_key.clone();
let hostname = req
.headers()
.get(HOST)
.map(|x| x.to_string())
.unwrap_or_default();
let ip_address = extract_ip_address(&req);
let path = req.uri().path().to_owned();
let method = req.method().to_string();
let user_agent = req
.headers()
.get(USER_AGENT)
.map(|x| x.to_string())
.unwrap_or_default();
let future = self.inner.call(req);
Box::pin(async move {
let res: Response = future.await?;
let request_data = RequestData::new(
hostname,
ip_address,
path,
user_agent,
method,
res.status().as_u16(),
now.elapsed().as_millis().try_into().unwrap(),
Utc::now().to_rfc3339(),
);
log_request(api_key, request_data);
Ok(res)
})
}
}