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use std::{
borrow::Cow,
ffi::{CStr, c_void},
};
use ffi::{ModuleRequest, ModuleResponse};
pub mod ffi {
use core::ffi;
use std::marker::PhantomData;
#[repr(C)]
pub struct ModuleRequest<'req> {
pub headers_len: u64,
pub headers: *const [*const ffi::c_char; 2],
pub body_len: u64,
pub body: *const u8,
pub _phantom: PhantomData<&'req u8>,
}
#[repr(C)]
pub struct ModuleResponse {
pub status: u16,
pub headers_len: u64,
pub headers: *const [*const ffi::c_char; 2],
pub body_len: u64,
pub body: *const u8,
/// The etc field is not read by corgi and exists so you may
/// associate data with a request
pub etc: *const ffi::c_void,
}
}
pub struct Request<'req> {
headers: Vec<(Cow<'req, str>, Cow<'req, str>)>,
body: Option<&'req [u8]>,
}
impl<'req> Request<'req> {
pub fn from_mod_request(request: *const ModuleRequest<'req>) -> Self {
// SAFTEY: corgi will never give us a null pointer
let reqref = unsafe { request.as_ref() }.unwrap();
let headers_ffi =
unsafe { std::slice::from_raw_parts(reqref.headers, reqref.headers_len as usize) };
let mut headers = vec![];
for pair in headers_ffi {
let k = unsafe { CStr::from_ptr(pair[0]) }.to_string_lossy();
let v = unsafe { CStr::from_ptr(pair[1]) }.to_string_lossy();
headers.push((k, v));
}
let body = if reqref.body.is_null() {
None
} else {
Some(unsafe { std::slice::from_raw_parts(reqref.body, reqref.body_len as usize) })
};
Self { headers, body }
}
pub fn header(&self, key: &str) -> Option<&str> {
for (hkey, hval) in &self.headers {
if hkey == key {
return Some(hval);
}
}
None
}
pub fn headers(&self) -> &[(Cow<str>, Cow<str>)] {
&self.headers
}
pub fn body(&self) -> Option<&[u8]> {
self.body
}
}
pub struct Response {
headers: Vec<(Cow<'static, CStr>, Cow<'static, CStr>)>,
ffi_headers: Vec<[*const i8; 2]>,
body: Vec<u8>,
}
impl Response {
pub fn new() -> Self {
Self {
headers: vec![],
ffi_headers: vec![],
body: vec![],
}
}
pub fn into_mod_response(self, status: u16) -> *const ModuleResponse {
let mut boxed_self = Box::new(self);
for (key, value) in boxed_self.headers.iter() {
let ffi_pair = [key.as_ptr(), value.as_ptr()];
boxed_self.ffi_headers.push(ffi_pair);
}
let boxed = Box::new(ModuleResponse {
status,
headers_len: boxed_self.ffi_headers.len() as u64,
headers: boxed_self.ffi_headers.as_ptr(),
body_len: boxed_self.body.len() as u64,
body: boxed_self.body.as_ptr(),
etc: Box::<Response>::into_raw(boxed_self) as *const c_void,
});
Box::<ModuleResponse>::into_raw(boxed)
}
pub fn header<K: Into<Cow<'static, CStr>>, V: Into<Cow<'static, CStr>>>(
&mut self,
key: K,
value: V,
) -> &mut Self {
self.headers.push((key.into(), value.into()));
self
}
pub fn body(&mut self, vec: Vec<u8>) -> &mut Self {
self.body = vec;
self
}
pub fn cleanup(response: *const ModuleResponse) {
let boxed = unsafe { Box::from_raw(response as *mut ModuleResponse) };
let etc = unsafe { Box::from_raw(boxed.etc as *mut Response) };
drop(boxed);
drop(etc);
}
}
|
