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use std::collections::HashMap;
use std::net::{SocketAddrV4, UdpSocket};
use std::str;
use crate::common::{messages, parsing, SearchOptions};
use crate::errors::SearchError;
use crate::gateway::Gateway;
pub fn search_gateway(options: SearchOptions) -> Result<Gateway, SearchError> {
let socket = UdpSocket::bind(options.bind_addr)?;
socket.set_read_timeout(options.timeout)?;
socket.send_to(messages::SEARCH_REQUEST.as_bytes(), options.broadcast_address)?;
loop {
let mut buf = [0u8; 1500];
let (read, _) = socket.recv_from(&mut buf)?;
let text = str::from_utf8(&buf[..read])?;
let (addr, root_url) = parsing::parse_search_result(text)?;
let (control_schema_url, control_url) = match get_control_urls(&addr, &root_url) {
Ok(o) => o,
Err(..) => continue,
};
let control_schema = match get_schemas(&addr, &control_schema_url) {
Ok(o) => o,
Err(..) => continue,
};
return Ok(Gateway {
addr,
root_url,
control_url,
control_schema_url,
control_schema,
});
}
}
fn get_control_urls(addr: &SocketAddrV4, root_url: &String) -> Result<(String, String), SearchError> {
let url = format!("http://{}:{}{}", addr.ip(), addr.port(), root_url);
let response = attohttpc::get(&url).send()?;
parsing::parse_control_urls(&response.bytes()?[..])
}
fn get_schemas(addr: &SocketAddrV4, control_schema_url: &String) -> Result<HashMap<String, Vec<String>>, SearchError> {
let url = format!("http://{}:{}{}", addr.ip(), addr.port(), control_schema_url);
let response = attohttpc::get(&url).send()?;
parsing::parse_schemas(&response.bytes()?[..])
}