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use core::str;
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
#[cfg_attr(feature = "defmt", derive(defmt::Format))]
pub enum HeaderSetError {
TooManyHeaders,
}
#[derive(Debug)]
#[cfg_attr(feature = "defmt", derive(defmt::Format))]
pub struct Headers<'b, const N: usize = 64>([(&'b str, &'b str); N]);
impl<'b, const N: usize> Headers<'b, N> {
pub const fn new() -> Self {
Self([("", ""); N])
}
pub fn content_len(&self) -> Option<u64> {
self.get("Content-Length")
.map(|content_len_str| content_len_str.parse::<u64>().unwrap())
}
pub fn content_type(&self) -> Option<&str> {
self.get("Content-Type")
}
pub fn content_encoding(&self) -> Option<&str> {
self.get("Content-Encoding")
}
pub fn transfer_encoding(&self) -> Option<&str> {
self.get("Transfer-Encoding")
}
pub fn host(&self) -> Option<&str> {
self.get("Host")
}
pub fn connection(&self) -> Option<&str> {
self.get("Connection")
}
pub fn cache_control(&self) -> Option<&str> {
self.get("Cache-Control")
}
pub fn upgrade(&self) -> Option<&str> {
self.get("Upgrade")
}
pub fn iter(&self) -> impl Iterator<Item = (&str, &str)> {
self.0
.iter()
.filter(|header| !header.0.is_empty())
.map(|header| (header.0, header.1))
}
pub fn get(&self, name: &str) -> Option<&str> {
self.iter()
.find(|(hname, _)| name.eq_ignore_ascii_case(hname))
.map(|(_, value)| value)
}
pub fn try_set(&mut self, name: &'b str, value: &'b str) -> Result<&mut Self, HeaderSetError> {
for header in &mut self.0 {
if header.0.is_empty() || header.0.eq_ignore_ascii_case(name) {
*header = (name, value);
return Ok(self);
}
}
Err(HeaderSetError::TooManyHeaders)
}
pub fn set(&mut self, name: &'b str, value: &'b str) -> &mut Self {
self.try_set(name, value).expect("No space left")
}
pub fn remove(&mut self, name: &str) -> &mut Self {
let index = self
.0
.iter()
.enumerate()
.find(|(_, header)| header.0.eq_ignore_ascii_case(name));
if let Some((mut index, _)) = index {
while index < self.0.len() - 1 {
self.0[index] = self.0[index + 1];
index += 1;
}
self.0[index] = ("", "");
}
self
}
pub fn set_content_len(
&mut self,
content_len: u64,
buf: &'b mut heapless::String<20>,
) -> &mut Self {
*buf = heapless::String::<20>::try_from(content_len).unwrap();
self.set("Content-Length", buf.as_str())
}
pub fn set_content_type(&mut self, content_type: &'b str) -> &mut Self {
self.set("Content-Type", content_type)
}
pub fn set_content_encoding(&mut self, content_encoding: &'b str) -> &mut Self {
self.set("Content-Encoding", content_encoding)
}
pub fn set_transfer_encoding(&mut self, transfer_encoding: &'b str) -> &mut Self {
self.set("Transfer-Encoding", transfer_encoding)
}
pub fn set_transfer_encoding_chunked(&mut self) -> &mut Self {
self.set_transfer_encoding("Chunked")
}
pub fn set_host(&mut self, host: &'b str) -> &mut Self {
self.set("Host", host)
}
pub fn set_connection(&mut self, connection: &'b str) -> &mut Self {
self.set("Connection", connection)
}
pub fn set_connection_close(&mut self) -> &mut Self {
self.set_connection("Close")
}
pub fn set_connection_keep_alive(&mut self) -> &mut Self {
self.set_connection("Keep-Alive")
}
pub fn set_connection_upgrade(&mut self) -> &mut Self {
self.set_connection("Upgrade")
}
pub fn set_cache_control(&mut self, cache: &'b str) -> &mut Self {
self.set("Cache-Control", cache)
}
pub fn set_cache_control_no_cache(&mut self) -> &mut Self {
self.set_cache_control("No-Cache")
}
pub fn set_upgrade(&mut self, upgrade: &'b str) -> &mut Self {
self.set("Upgrade", upgrade)
}
pub fn set_upgrade_websocket(&mut self) -> &mut Self {
self.set_upgrade("websocket")
}
pub fn as_slice(&self) -> &[(&'b str, &'b str)] {
let index = self
.0
.iter()
.enumerate()
.find(|(_, header)| header.0.is_empty())
.map(|(index, _)| index)
.unwrap_or(N);
&self.0[..index]
}
pub fn release(self) -> [(&'b str, &'b str); N] {
self.0
}
}
impl<'b, const N: usize> Default for Headers<'b, N> {
fn default() -> Self {
Self::new()
}
}
impl<'b, const N: usize> crate::http::Headers for Headers<'b, N> {
fn header(&self, name: &str) -> Option<&'_ str> {
self.get(name)
}
}
pub mod cookies {
use core::iter;
use core::str::Split;
pub struct Cookies<'a>(&'a str);
impl<'a> Cookies<'a> {
pub fn new(cookies_str: &'a str) -> Self {
Self(cookies_str)
}
pub fn get(&self, name: &str) -> Option<&'a str> {
Cookies::new(self.0)
.into_iter()
.find(|(key, _)| *key == name)
.map(|(_, value)| value)
}
pub fn set<'b, I>(
iter: I,
name: &'b str,
value: &'b str,
) -> impl Iterator<Item = (&'b str, &'b str)>
where
I: Iterator<Item = (&'b str, &'b str)> + 'b,
{
iter.filter(move |(key, _)| *key != name)
.chain(core::iter::once((name, value)))
}
pub fn remove<'b, I>(iter: I, name: &'b str) -> impl Iterator<Item = (&'b str, &'b str)>
where
I: Iterator<Item = (&'b str, &'b str)> + 'b,
{
iter.filter(move |(key, _)| *key != name)
}
pub fn serialize<'b, I>(iter: I) -> impl Iterator<Item = &'b str>
where
I: Iterator<Item = (&'b str, &'b str)> + 'b,
{
iter.flat_map(|(k, v)| {
iter::once(";")
.chain(iter::once(k))
.chain(iter::once("="))
.chain(iter::once(v))
})
.skip(1)
}
}
impl<'a> IntoIterator for Cookies<'a> {
type Item = (&'a str, &'a str);
type IntoIter = CookieIterator<'a>;
fn into_iter(self) -> Self::IntoIter {
CookieIterator::new(self.0)
}
}
pub struct CookieIterator<'a>(Split<'a, char>);
impl<'a> CookieIterator<'a> {
pub fn new(cookies: &'a str) -> Self {
Self(cookies.split(';'))
}
}
impl<'a> Iterator for CookieIterator<'a> {
type Item = (&'a str, &'a str);
fn next(&mut self) -> Option<Self::Item> {
self.0
.next()
.map(|cookie_pair| cookie_pair.split('='))
.and_then(|mut cookie_pair| {
cookie_pair
.next()
.map(|name| cookie_pair.next().map(|value| (name, value)))
})
.flatten()
}
}
}
pub mod server {
pub mod registration {
use crate::http::Method;
pub struct ChainHandler<H, N> {
pub path: &'static str,
pub method: Method,
pub handler: H,
pub next: N,
}
impl<H, N> ChainHandler<H, N> {
pub fn get<H2>(
self,
path: &'static str,
handler: H2,
) -> ChainHandler<H2, ChainHandler<H, N>> {
self.request(path, Method::Get, handler)
}
pub fn post<H2>(
self,
path: &'static str,
handler: H2,
) -> ChainHandler<H2, ChainHandler<H, N>> {
self.request(path, Method::Post, handler)
}
pub fn put<H2>(
self,
path: &'static str,
handler: H2,
) -> ChainHandler<H2, ChainHandler<H, N>> {
self.request(path, Method::Put, handler)
}
pub fn delete<H2>(
self,
path: &'static str,
handler: H2,
) -> ChainHandler<H2, ChainHandler<H, N>> {
self.request(path, Method::Delete, handler)
}
pub fn request<H2>(
self,
path: &'static str,
method: Method,
handler: H2,
) -> ChainHandler<H2, ChainHandler<H, N>> {
ChainHandler {
path,
method,
handler,
next: self,
}
}
}
pub struct ChainRoot;
impl ChainRoot {
pub fn get<H2>(self, path: &'static str, handler: H2) -> ChainHandler<H2, ChainRoot> {
self.request(path, Method::Get, handler)
}
pub fn post<H2>(self, path: &'static str, handler: H2) -> ChainHandler<H2, ChainRoot> {
self.request(path, Method::Post, handler)
}
pub fn put<H2>(self, path: &'static str, handler: H2) -> ChainHandler<H2, ChainRoot> {
self.request(path, Method::Put, handler)
}
pub fn delete<H2>(
self,
path: &'static str,
handler: H2,
) -> ChainHandler<H2, ChainRoot> {
self.request(path, Method::Delete, handler)
}
pub fn request<H2>(
self,
path: &'static str,
method: Method,
handler: H2,
) -> ChainHandler<H2, ChainRoot> {
ChainHandler {
path,
method,
handler,
next: ChainRoot,
}
}
}
}
// TODO: Commented out as it needs a mutex, yet `embedded-svc` no longer has one
// An option is to depend on `embassy-sync`, yet this decision would be deplayed until
// we figure out in general what to do with the utility code in `embedded-svc`.
// pub mod session {
// use core::convert::TryInto;
// use core::fmt;
// use core::time::Duration;
// use crate::http::server::*;
// use crate::utils::http::cookies::*;
// use crate::utils::mutex::{Mutex, RawMutex};
// #[derive(Debug)]
// #[cfg_attr(feature = "defmt", derive(defmt::Format))]
// pub enum SessionError {
// MaxSessionsReachedError,
// }
// impl fmt::Display for SessionError {
// fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
// match self {
// Self::MaxSessionsReachedError => {
// write!(f, "Max number of sessions reached")
// }
// }
// }
// }
// #[cfg(feature = "std")]
// impl std::error::Error for SessionError {}
// pub trait Session: Send {
// type SessionData;
// fn is_existing(&self, session_id: Option<&str>) -> bool;
// fn with_existing<R, F>(&self, session_id: Option<&str>, f: F) -> Option<R>
// where
// F: FnOnce(&mut Self::SessionData) -> R;
// fn with<R, F>(&self, session_id: &str, f: F) -> Result<R, SessionError>
// where
// F: FnOnce(&mut Self::SessionData) -> R;
// fn invalidate(&self, session_id: Option<&str>) -> bool;
// }
// #[derive(Debug, Default)]
// #[cfg_attr(feature = "defmt", derive(defmt::Format))]
// pub struct SessionData<S> {
// id: heapless::String<32>,
// last_accessed: Duration,
// timeout: Duration,
// data: S,
// }
// pub struct SessionImpl<M, S, T, const N: usize = 16>
// where
// M: RawMutex,
// S: Default + Send,
// {
// current_time: T,
// data: Mutex<M, [SessionData<S>; N]>,
// default_session_timeout: Duration,
// }
// impl<M, S, T, const N: usize> SessionImpl<M, S, T, N>
// where
// M: RawMutex,
// S: Default + Send,
// {
// fn cleanup(&self, current_time: Duration) {
// let mut data = self.data.lock();
// for entry in &mut *data {
// if entry.last_accessed + entry.timeout < current_time {
// entry.id = heapless::String::new();
// }
// }
// }
// }
// impl<M, S, T, const N: usize> Session for SessionImpl<M, S, T, N>
// where
// M: RawMutex + Send + Sync,
// S: Default + Send,
// T: Fn() -> Duration + Send,
// {
// type SessionData = S;
// fn is_existing(&self, session_id: Option<&str>) -> bool {
// let current_time = (self.current_time)();
// self.cleanup(current_time);
// if let Some(session_id) = session_id {
// let mut data = self.data.lock();
// data.iter_mut()
// .find(|entry| entry.id.as_str() == session_id)
// .map(|entry| entry.last_accessed = current_time)
// .is_some()
// } else {
// false
// }
// }
// fn with_existing<R, F>(&self, session_id: Option<&str>, f: F) -> Option<R>
// where
// F: FnOnce(&mut Self::SessionData) -> R,
// {
// let current_time = (self.current_time)();
// self.cleanup(current_time);
// if let Some(session_id) = session_id {
// let mut data = self.data.lock();
// data.iter_mut()
// .find(|entry| entry.id.as_str() == session_id)
// .map(|entry| {
// entry.last_accessed = current_time;
// f(&mut entry.data)
// })
// } else {
// None
// }
// }
// fn with<'b, R, F>(&self, session_id: &str, f: F) -> Result<R, SessionError>
// where
// F: FnOnce(&mut Self::SessionData) -> R,
// {
// let current_time = (self.current_time)();
// self.cleanup(current_time);
// let mut data = self.data.lock();
// if let Some(entry) = data
// .iter_mut()
// .find(|entry| entry.id.as_str() == session_id)
// .map(|entry| {
// entry.last_accessed = current_time;
// entry
// })
// {
// Ok(f(&mut entry.data))
// } else if let Some(entry) = data.iter_mut().find(|entry| entry.id == "") {
// entry.id = session_id.try_into().unwrap();
// entry.data = Default::default();
// entry.timeout = self.default_session_timeout;
// entry.last_accessed = current_time;
// Ok(f(&mut entry.data))
// } else {
// Err(SessionError::MaxSessionsReachedError)
// }
// }
// fn invalidate(&self, session_id: Option<&str>) -> bool {
// let current_time = (self.current_time)();
// self.cleanup(current_time);
// if let Some(session_id) = session_id {
// let mut data = self.data.lock();
// if let Some(entry) = data
// .iter_mut()
// .find(|entry| entry.id.as_str() == session_id)
// {
// entry.id = heapless::String::new();
// true
// } else {
// false
// }
// } else {
// false
// }
// }
// }
// pub fn get_cookie_session_id<H>(headers: &H) -> Option<&str>
// where
// H: Headers,
// {
// headers
// .header("Cookie")
// .and_then(|cookies_str| Cookies::new(cookies_str).get("SESSIONID"))
// }
// pub fn set_cookie_session_id<'a, const N: usize, H>(
// headers: H,
// session_id: &str,
// cookies: &mut heapless::String<N>,
// ) where
// H: Headers + 'a,
// {
// let cookies_str = headers.header("Cookie").unwrap_or("");
// for cookie in Cookies::serialize(Cookies::set(
// Cookies::new(cookies_str).into_iter(),
// "SESSIONID",
// session_id,
// )) {
// cookies.push_str(cookie).unwrap(); // TODO
// }
// }
// }
}