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use core::ffi;
use std::{
borrow::Cow,
ffi::{CStr, CString},
ptr,
str::FromStr,
sync::Mutex,
};
#[repr(C)]
pub struct ModuleRequest<'req> {
pub headers_len: ffi::c_ulong,
pub headers: &'req [[*const ffi::c_char; 2]],
pub body_len: ffi::c_ulong,
pub body: *const u8,
}
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) -> Self {
let reqref = unsafe { request.as_ref() }.unwrap();
let mut headers = vec![];
for idx in 0..reqref.headers_len as usize {
let kvarr = reqref.headers[idx as usize];
let k = unsafe { CStr::from_ptr(kvarr[0]) }.to_string_lossy();
let v = unsafe { CStr::from_ptr(kvarr[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
}
}
#[repr(C)]
pub struct ModuleResponse {
pub status: ffi::c_ushort,
pub headers_len: ffi::c_ulong,
pub headers: &'static [[*const ffi::c_char; 2]],
pub body_len: ffi::c_ulong,
pub body: *const u8,
}
pub static mut HEADERS: [[*const ffi::c_char; 2]; 64] = [[ptr::null(), ptr::null()]; 64];
static RESPONSE: Mutex<Option<Response>> = Mutex::new(None);
#[derive(Clone, Debug, PartialEq)]
enum ResponseBody {
Building(String),
Built(CString),
}
impl ResponseBody {
pub fn get_built(&mut self) -> &CString {
match self {
ResponseBody::Building(body) => {
*self = ResponseBody::Built(CString::from_str(&body).unwrap());
if let ResponseBody::Built(bdy) = self {
bdy
} else {
unreachable!()
}
}
ResponseBody::Built(bdy) => bdy,
}
}
}
pub struct Response {
headers: Vec<(CString, CString)>,
body: ResponseBody,
}
impl Response {
pub fn new() -> Self {
Self {
headers: vec![],
body: ResponseBody::Building(String::new()),
}
}
pub fn into_mod_response(self, status: u16) -> *const ModuleResponse {
let mut lock = RESPONSE.lock().unwrap();
*lock = Some(self);
let this = lock.as_mut().unwrap();
for (idx, (key, value)) in this.headers.iter().enumerate() {
unsafe {
HEADERS[idx][0] = key.as_ptr();
HEADERS[idx][1] = value.as_ptr();
}
}
let (body_len, body) = {
let built = this.body.get_built();
(built.as_bytes().len() as u64, built.as_ptr() as *const u8)
};
let headers_len = this.headers.len() as u64;
let boxed = Box::new(ModuleResponse {
status,
headers_len,
headers: unsafe { &HEADERS[..headers_len as usize] },
body_len,
body,
});
Box::<ModuleResponse>::into_raw(boxed)
}
pub fn header<K: Into<CString>, V: Into<CString>>(&mut self, key: K, value: V) -> &mut Self {
self.headers.push((key.into(), value.into()));
self
}
pub fn push_str(&mut self, s: &str) {
match self.body {
ResponseBody::Building(ref mut body) => {
body.push_str(s);
}
_ => (),
}
}
pub fn cleanup(response: *const ModuleResponse) {
let mut lock = RESPONSE.lock().unwrap();
match lock.take() {
Some(response) => drop(response),
None => (),
}
let boxed = unsafe { Box::from_raw(response as *mut ModuleResponse) };
drop(boxed);
}
}
|
