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/* SPDX-License-Identifier: Apache-2.0 */
/*
* Copyright (C) Andrew Clayton
* Copyright (C) Timo Stark
* Copyright (C) F5, Inc.
*/
// Include RAW FFI Bindings.
// @todo: Replace this with the new native Rust API
use unit_wasm::ffi::*;
use std::ffi::CStr;
use std::os::raw::c_char;
use std::os::raw::c_void;
use std::ptr;
// Buffer of some size to store the copy of the request
static mut REQUEST_BUF: *mut u8 = ptr::null_mut();
#[no_mangle]
pub extern "C" fn luw_module_end_handler() {
unsafe {
luw_free(REQUEST_BUF as *mut c_void);
}
}
#[no_mangle]
pub extern "C" fn luw_module_init_handler() {
unsafe {
REQUEST_BUF = luw_malloc(luw_mem_get_init_size().try_into().unwrap())
as *mut u8;
}
}
pub extern "C" fn hdr_iter_func(
ctx: *mut luw_ctx_t,
name: *const c_char,
value: *const c_char,
_data: *mut c_void,
) -> bool {
unsafe {
luw_mem_writep(
ctx,
"%s = %s\n\0".as_ptr() as *const c_char,
name,
value,
);
}
return true;
}
#[no_mangle]
pub extern "C" fn luw_request_handler(addr: *mut u8) -> i32 {
// Need a initalization
//
// It sucks that rust needs this, this is supposed to be
// an opaque structure and the structure is 0-initialised
// in luw_init_ctx();
let mut ctx_: luw_ctx_t = luw_ctx_t {
addr: ptr::null_mut(),
mem: ptr::null_mut(),
req: ptr::null_mut(),
resp: ptr::null_mut(),
resp_hdr: ptr::null_mut(),
resp_offset: 0,
req_buf: ptr::null_mut(),
hdrp: ptr::null_mut(),
reqp: ptr::null_mut(),
};
let ctx: *mut luw_ctx_t = &mut ctx_;
unsafe {
// Initialise the context structure.
//
// addr is the address of the previously allocated memory shared
// between the module and unit.
//
// The response data will be stored @ addr + offset (of 4096 bytes).
// This will leave some space for the response headers.
luw_init_ctx(ctx, addr, 4096);
// Allocate memory to store the request and copy the request data.
luw_set_req_buf(ctx, &mut REQUEST_BUF, luw_srb_flags_t_LUW_SRB_NONE);
// Define the Response Body Text.
luw_mem_writep(
ctx,
" * Welcome to WebAssembly in Rust on Unit! \
[libunit-wasm (%d.%d.%d/%#0.8x)] \
*\n\n\0"
.as_ptr() as *const c_char,
LUW_VERSION_MAJOR,
LUW_VERSION_MINOR,
LUW_VERSION_PATCH,
LUW_VERSION_NUMBER,
);
luw_mem_writep(ctx, "[Request Info]\n\0".as_ptr() as *const c_char);
luw_mem_writep(
ctx,
"REQUEST_PATH = %s\n\0".as_ptr() as *const c_char,
luw_get_http_path(ctx) as *const c_char,
);
luw_mem_writep(
ctx,
"METHOD = %s\n\0".as_ptr() as *const c_char,
luw_get_http_method(ctx) as *const c_char,
);
luw_mem_writep(
ctx,
"VERSION = %s\n\0".as_ptr() as *const c_char,
luw_get_http_version(ctx) as *const c_char,
);
luw_mem_writep(
ctx,
"QUERY = %s\n\0".as_ptr() as *const c_char,
luw_get_http_query(ctx) as *const c_char,
);
luw_mem_writep(
ctx,
"REMOTE = %s\n\0".as_ptr() as *const c_char,
luw_get_http_remote(ctx) as *const c_char,
);
luw_mem_writep(
ctx,
"LOCAL_ADDR = %s\n\0".as_ptr() as *const c_char,
luw_get_http_local_addr(ctx) as *const c_char,
);
luw_mem_writep(
ctx,
"LOCAL_PORT = %s\n\0".as_ptr() as *const c_char,
luw_get_http_local_port(ctx) as *const c_char,
);
luw_mem_writep(
ctx,
"SERVER_NAME = %s\n\0".as_ptr() as *const c_char,
luw_get_http_server_name(ctx) as *const c_char,
);
luw_mem_writep(
ctx,
"\n[Request Headers]\n\0".as_ptr() as *const c_char,
);
luw_http_hdr_iter(ctx, Some(hdr_iter_func), ptr::null_mut());
let method = CStr::from_ptr(luw_get_http_method(ctx)).to_str().unwrap();
if method == "POST" || method == "PUT" {
luw_mem_writep(
ctx,
"\n[%s data]\n\0".as_ptr() as *const c_char,
luw_get_http_method(ctx) as *const c_char,
);
luw_mem_writep_data(
ctx,
luw_get_http_content(ctx),
luw_get_http_content_len(ctx),
);
luw_mem_writep(ctx, "\n\0".as_ptr() as *const c_char);
}
let content_len = format!("{}\0", luw_get_response_data_size(ctx));
// Init Response Headers
//
// Needs the context, number of headers about to add as well as
// the offset where to store the headers. In this case we are
// storing the response headers at the beginning of our shared
// memory at offset 0.
luw_http_init_headers(ctx, 2, 0);
luw_http_add_header(
ctx,
0,
"Content-Type\0".as_ptr() as *const c_char,
"text/plain\0".as_ptr() as *const c_char,
);
luw_http_add_header(
ctx,
1,
"Content-Length\0".as_ptr() as *const c_char,
content_len.as_ptr() as *const c_char,
);
// This calls nxt_wasm_send_headers() in Unit
luw_http_send_headers(ctx);
// This calls nxt_wasm_send_response() in Unit
luw_http_send_response(ctx);
// This calls nxt_wasm_response_end() in Unit
luw_http_response_end();
}
return 0;
}
|
