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use c_binding::*;
use std::ffi::CString;
use std::ffi::CStr;
use uuid::Uuid;
use std::collections::HashMap;
use log::{info, debug,error};
pub mod c_binding;
pub struct SaslAuth {
pub username: String,
pub password: String
}
#[allow(dead_code)]
pub struct Connection {
connection: *mut c_binding::pn_connection_t,
transport: *mut c_binding::pn_transport_t,
link: *mut c_binding::pn_link_t,
proactor: *mut c_binding::pn_proactor_t,
}
#[allow(dead_code)]
#[derive(Debug,Clone)]
pub struct Message{
pub body: String,
pub header: Option<HashMap<String,String>>
}
impl Connection {
pub fn send_message(&self, payload: String){
unsafe{
if pn_link_credit(self.link) > 0 {
let counter_string = CString::new(Uuid::new_v4().to_string()).unwrap();
let dtag = pn_dtag(counter_string.as_ptr(), 1);
pn_delivery(self.link, dtag);
let message = pn_message();
let body = pn_message_body(message);
pn_data_enter(body);
let content = CString::new(payload.clone()).unwrap();
pn_data_put_string(body, pn_bytes(payload.len(), content.as_ptr()));
pn_data_exit(body);
let mut buf_size: usize = 1024*1024;
let buf_vec:Vec<i8> = vec![0; buf_size];
let buf_ref: *const std::os::raw::c_char = buf_vec.as_ptr();
let result = pn_message_encode(message,buf_ref,&mut buf_size);
info!("pn_message_encode: {}",result);
info!("buffer size {}",buf_size);
let result = pn_link_send(self.link, buf_ref, buf_size);
info!("pn_link_send: {}",result);
let result = pn_link_advance(self.link);
info!("pn_link_advance: {}",result);
pn_message_clear(message);
self.wait_for(pn_event_type_t::PN_DELIVERY);
}
}
}
fn wait_for(&self, target: pn_event_type_t){
unsafe{
loop {
let events = pn_proactor_wait(self.proactor);
let mut should_continue = true;
loop {
let event = pn_event_batch_next(events);
if event.is_null() {
break
}
match pn_event_type(event) {
_ => {
if pn_event_type(event) == target {
info!("matched target {:?}",pn_event_type(event));
should_continue = false;
break;
}else{
debug!("{:?}",pn_event_type(event));
}
}
}
}
pn_proactor_done(self.proactor, events);
if !should_continue {
break;
}
}
}
}
}
pub fn connect(host: String, port: u16, auth: Option<SaslAuth>, destination: String) -> Option<Connection> {
let mut result: Option<Connection> = None;
unsafe{
let proactor = pn_proactor();
let addr = format!("{}:{}",host,port);
let host2 = host.clone();
let dest2 = destination.clone();
let c_addr = CString::new(addr).unwrap();
let transport = pn_transport();
let connection = pn_connection();
let log_level = log::max_level();
if log_level == log::LevelFilter::Trace {
let logger = pn_transport_logger(transport);
pn_logger_set_mask(logger, pn_log_subsystem_t::PN_SUBSYSTEM_ALL, pn_log_level_t::PN_LEVEL_ALL);
}
match auth {
Some(auth) => {
pn_transport_require_auth(transport,true);
pn_transport_require_encryption(transport,true);
pn_connection_set_user(connection, CString::new(auth.username).unwrap().as_ptr());
pn_connection_set_password(connection, CString::new(auth.password).unwrap().as_ptr());
pn_connection_set_hostname(connection, CString::new(host).unwrap().as_ptr());
let sasl = pn_sasl(transport);
pn_sasl_set_allow_insecure_mechs(sasl, true);
pn_sasl_allowed_mechs(sasl, CString::new("PLAIN").unwrap().as_ptr());
},
None => {}
}
pn_proactor_connect2(proactor,connection, transport, c_addr.as_ptr());
loop {
let events = pn_proactor_wait(proactor);
let mut should_continue = true;
loop {
let host3 = host2.to_string();
let dest3 = dest2.to_string();
let event = pn_event_batch_next(events);
if event.is_null() {
break
}
match pn_event_type(event) {
pn_event_type_t::PN_CONNECTION_INIT =>{
info!("PN_CONNECTION_INIT: connection init");
let c = pn_event_connection(event);
let s = pn_session(pn_event_connection(event));
let unqiue_id = "unique";
let c_unique_id = CString::new(unqiue_id).unwrap();
pn_connection_set_container(c, c_unique_id.as_ptr());
let ssl = pn_ssl(transport);
pn_ssl_init(ssl,std::ptr::null_mut(),std::ptr::null_mut());
pn_ssl_set_peer_hostname(ssl,CString::new(host3).unwrap().as_ptr());
pn_connection_open(c);
pn_session_open(s);
let sender_name = "sender";
let c_sender_name = CString::new(sender_name).unwrap();
let l = pn_sender(s, c_sender_name.as_ptr());
let c_amqp_address = CString::new(dest3).unwrap();
pn_terminus_set_address(pn_link_target(l), c_amqp_address.as_ptr());
pn_link_open(l);
result = Some(Connection{
transport: transport,
connection: connection,
link: l,
proactor: proactor,
});
should_continue = true;
},
pn_event_type_t::PN_TRANSPORT_ERROR =>{
error!("PN_TRANSPORT_ERROR: something went wrong");
let condition = pn_transport_condition(transport);
let name = pn_condition_get_name(condition);
let name2 = CStr::from_ptr(name).to_str().unwrap();
let description = pn_condition_get_description(condition);
let description2 = CStr::from_ptr(description).to_str().unwrap();
error!("name: {}",name2);
error!("desc: {}",description2);
},
pn_event_type_t::PN_LINK_FLOW => {
info!("PN_LINK_FLOW: link ready");
should_continue = false;
},
_ => {
info!("{:?}",pn_event_type(event));
}
}
}
info!("pn_proactor_done");
pn_proactor_done(proactor, events);
if !should_continue {
break;
}
}
}
result
}