1 // Copyright 2024 Google LLC 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); 4 // you may not use this file except in compliance with the License. 5 // You may obtain a copy of the License at 6 // 7 // https://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 // See the License for the specific language governing permissions and 13 // limitations under the License. 14 15 //! This module defines the Proxy error types. 16 17 use std::fmt; 18 use std::io; 19 use std::net::SocketAddr; 20 21 /// An enumeration of possible errors. 22 #[derive(Debug)] 23 pub enum Error { 24 IoError(io::Error), 25 ConnectionError(SocketAddr, String), 26 MalformedConfigString, 27 InvalidPortNumber, 28 InvalidHost, 29 } 30 31 impl fmt::Display for Error { fmt(&self, f: &mut fmt::Formatter) -> fmt::Result32 fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { 33 write!(f, "ProxyError: {self:?}") 34 } 35 } 36 37 impl std::error::Error for Error {} 38 39 impl From<io::Error> for Error { from(err: io::Error) -> Self40 fn from(err: io::Error) -> Self { 41 Error::IoError(err) 42 } 43 } 44 45 #[cfg(test)] 46 mod tests { 47 use super::*; 48 49 #[test] test_io_error_chaining()50 fn test_io_error_chaining() { 51 let inner_error = std::io::Error::new(std::io::ErrorKind::NotFound, "file not found"); 52 let outer_error = Error::IoError(inner_error); 53 54 assert!(outer_error.to_string().contains("file not found")); 55 } 56 } 57