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use url::{percent_encoding, Url}; use std::num::ParseIntError; use std::str::FromStr; #[derive(Clone, Debug, PartialEq)] pub struct AMQPUri { pub scheme: AMQPScheme, pub authority: AMQPAuthority, pub vhost: String, pub query: AMQPQueryString, } #[derive(Clone, Debug, PartialEq)] pub enum AMQPScheme { AMQP, AMQPS, } #[derive(Clone, Debug, PartialEq)] pub struct AMQPAuthority { pub userinfo: AMQPUserInfo, pub host: String, pub port: u16, } #[derive(Clone, Debug, PartialEq)] pub struct AMQPUserInfo { pub username: String, pub password: String, } #[derive(Clone, Debug, Default, PartialEq)] pub struct AMQPQueryString { pub heartbeat: Option<u16>, } fn percent_decode(s: &str) -> Result<String, String> { percent_encoding::percent_decode(s.as_bytes()).decode_utf8().map(|s| s.to_string()).map_err(|e| e.to_string()) } impl Default for AMQPUri { fn default() -> Self { AMQPUri { scheme: Default::default(), authority: Default::default(), vhost: "/".to_string(), query: Default::default(), } } } impl FromStr for AMQPUri { type Err = String; fn from_str(s: &str) -> Result<Self, Self::Err> { let url = Url::parse(s).map_err(|e| e.to_string())?; if url.cannot_be_a_base() { return Err(format!("Invalid URL: '{}'", s)); } let default = AMQPUri::default(); let scheme = match url.scheme() { "amqp" => AMQPScheme::AMQP, "amqps" => AMQPScheme::AMQPS, scheme => return Err(format!("Invalid scheme: '{}'", scheme)), }; let username = match url.username() { "" => default.authority.userinfo.username, username => percent_decode(username)?, }; let password = url.password().map_or(Ok(default.authority.userinfo.password), percent_decode)?; let host = url.domain().map_or(Ok(default.authority.host), percent_decode)?; let port = url.port().unwrap_or(scheme.default_port()); let vhost = percent_decode(&url.path()[1..])?; let heartbeat = url.query_pairs().find(|&(ref key, _)| key == "heartbeat").map_or(Ok(None), |(_, ref value)| value.parse().map(Some)).map_err(|e: ParseIntError| e.to_string())?; Ok(AMQPUri { scheme: scheme, authority: AMQPAuthority { userinfo: AMQPUserInfo { username: username, password: password, }, host: host, port: port, }, vhost: vhost, query: AMQPQueryString { heartbeat: heartbeat, } }) } } impl AMQPScheme { fn default_port(&self) -> u16 { match *self { AMQPScheme::AMQP => 5672, AMQPScheme::AMQPS => 5671, } } } impl Default for AMQPScheme { fn default() -> Self { AMQPScheme::AMQP } } impl Default for AMQPAuthority { fn default() -> Self { AMQPAuthority { userinfo: Default::default(), host: "localhost".to_string(), port: AMQPScheme::default().default_port(), } } } impl Default for AMQPUserInfo { fn default() -> Self { AMQPUserInfo { username: "guest".to_string(), password: "guest".to_string(), } } } #[cfg(test)] mod test { use super::*; #[test] fn test_parse_amqp() { let uri = "amqp://localhost/%2f".parse(); assert_eq!(uri, Ok(AMQPUri::default())); } #[test] fn test_parse_amqps() { let uri = "amqps://localhost/".parse(); assert_eq!(uri, Ok(AMQPUri { scheme: AMQPScheme::AMQPS, authority: AMQPAuthority { port: 5671, ..Default::default() }, vhost: "".to_string(), ..Default::default() })); } #[test] fn test_parse_amqps_with_creds() { let uri = "amqps://user:pass@hostname/v?foo=bar".parse(); assert_eq!(uri, Ok(AMQPUri { scheme: AMQPScheme::AMQPS, authority: AMQPAuthority { userinfo: AMQPUserInfo { username: "user".to_string(), password: "pass".to_string(), }, host: "hostname".to_string(), port: 5671, }, vhost: "v".to_string(), ..Default::default() })); } #[test] fn test_parse_amqps_with_creds_percent() { let uri = "amqp://user%61:%61pass@ho%61st:10000/v%2fhost".parse(); assert_eq!(uri, Ok(AMQPUri { scheme: AMQPScheme::AMQP, authority: AMQPAuthority { userinfo: AMQPUserInfo { username: "usera".to_string(), password: "apass".to_string(), }, host: "hoast".to_string(), port: 10000, }, vhost: "v/host".to_string(), ..Default::default() })); } #[test] fn test_parse_with_heartbeat() { let uri = "amqp://localhost/%2f?heartbeat=42".parse(); assert_eq!(uri, Ok(AMQPUri { query: AMQPQueryString { heartbeat: Some(42), }, ..Default::default() })); } #[test] fn test_url_with_no_base() { let uri: Result<AMQPUri, String> = "foo".parse(); assert_eq!(uri, Err("relative URL without a base".to_string())); } #[test] fn test_invalid_url() { let uri: Result<AMQPUri, String> = "foo:bar".parse(); assert_eq!(uri, Err("Invalid URL: 'foo:bar'".to_string())); } #[test] fn test_invalid_scheme() { let uri: Result<AMQPUri, String> = "http://localhost/".parse(); assert_eq!(uri, Err("Invalid scheme: 'http'".to_string())); } }