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use core::fmt;
use std::ops::Deref;
use axum::{
async_trait,
extract::FromRequestParts,
http::{header, request::Parts, HeaderName, StatusCode},
RequestPartsExt,
};
use sha2::{Digest, Sha256};
use time::{format_description::FormatItem, macros::format_description, OffsetDateTime};
#[derive(Debug, Clone)]
pub struct RemoteIp(String);
#[async_trait]
impl<S> FromRequestParts<S> for RemoteIp
where
S: Send + Sync,
{
type Rejection = (StatusCode, &'static str);
async fn from_request_parts(parts: &mut Parts, _state: &S) -> Result<Self, Self::Rejection> {
if let Some(forwarded_for) = parts
.headers
.get(HeaderName::from_static("x-forwarded-for"))
{
match forwarded_for.to_str() {
Err(_e) => Err((StatusCode::INTERNAL_SERVER_ERROR, "server error")),
Ok(remoteip) => Ok(Self(remoteip.to_owned())),
}
} else {
Err((StatusCode::INTERNAL_SERVER_ERROR, "server error"))
}
}
}
impl Deref for RemoteIp {
type Target = str;
fn deref(&self) -> &Self::Target {
&self.0
}
}
const FMT: &[FormatItem<'_>] = format_description!("[year]-[month]-[day]");
#[derive(Debug, Copy, Clone)]
pub struct SessionId([u8; 4]);
#[async_trait]
impl<S> FromRequestParts<S> for SessionId
where
S: Send + Sync,
{
type Rejection = (StatusCode, &'static str);
async fn from_request_parts(parts: &mut Parts, _state: &S) -> Result<Self, Self::Rejection> {
let remote = parts
.extract::<RemoteIp>()
.await
.map(|rip| rip.0)
.unwrap_or(String::from("127.0.0.1"));
let agent = parts
.headers
.get(header::USER_AGENT)
.and_then(|ua| ua.to_str().ok())
.unwrap_or("unknown");
let date = OffsetDateTime::now_local().unwrap_or_else(|_| OffsetDateTime::now_utc());
let string = format!("{remote} - {agent} - {}", date.format(FMT).unwrap());
let mut hasher = Sha256::new();
hasher.update(string.as_bytes());
let hash = hasher.finalize();
let slc: [u8; 4] = hash.as_slice()[0..4].try_into().unwrap();
Ok(Self(slc))
}
}
impl fmt::Display for SessionId {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
for byte in self.0.as_slice() {
write!(f, "{byte:02X}")?;
}
Ok(())
}
}
#[derive(Debug, Clone)]
pub struct Referer(String);
#[async_trait]
impl<S> FromRequestParts<S> for Referer
where
S: Send + Sync,
{
type Rejection = (StatusCode, &'static str);
async fn from_request_parts(parts: &mut Parts, _state: &S) -> Result<Self, Self::Rejection> {
if let Some(refer) = parts.headers.get(header::REFERER) {
match refer.to_str() {
Err(_e) => Err((StatusCode::INTERNAL_SERVER_ERROR, "server error")),
Ok(refer) => match url::Url::parse(refer) {
Err(_e) => Err((
StatusCode::INTERNAL_SERVER_ERROR,
"failed to parse referer url",
)),
Ok(url) => match url.host_str() {
None => Err((StatusCode::INTERNAL_SERVER_ERROR, "referer url had no host")),
Some(str) => Ok(Referer(str.to_owned())),
},
},
}
} else {
Err((StatusCode::INTERNAL_SERVER_ERROR, "server error"))
}
}
}
impl Deref for Referer {
type Target = str;
fn deref(&self) -> &Self::Target {
&self.0
}
}
impl fmt::Display for Referer {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
write!(f, "{}", self.0)
}
}
|
