1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
|
use std::{borrow::Cow, ffi::CStr, ptr, sync::Mutex};
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,
}
}
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
}
}
const HEADERS_LEN: usize = 64;
static mut HEADERS: [[*const core::ffi::c_char; 2]; HEADERS_LEN] = [[ptr::null(), ptr::null()]; 64];
static RESPONSE: Mutex<Option<Response>> = Mutex::new(None);
pub struct Response {
headers: Vec<(Cow<'static, CStr>, Cow<'static, CStr>)>,
body: Vec<u8>,
}
impl Response {
pub fn new() -> Self {
Self {
headers: vec![],
body: vec![],
}
}
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().take(HEADERS_LEN) {
unsafe {
HEADERS[idx][0] = key.as_ptr();
HEADERS[idx][1] = value.as_ptr();
}
}
let headers_len = this.headers.len().min(HEADERS_LEN) as u64;
let boxed = Box::new(ModuleResponse {
status,
headers_len,
headers: unsafe { HEADERS[..headers_len as usize].as_ptr() },
body_len: this.body.len() as u64,
body: this.body.as_ptr(),
});
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 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);
}
}
|
