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54 lines
1.6 KiB
Rust
54 lines
1.6 KiB
Rust
use crate::context::Context;
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use crate::error::Result;
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use crate::payload::{FromPayload, IntoPayload};
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use crate::prelude::{IPCError, IPCResult};
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use byteorder::{BigEndian, ReadBytesExt};
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use bytes::{BufMut, Bytes, BytesMut};
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use std::error::Error;
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use std::fmt::{Display, Formatter};
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use std::io::Read;
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pub static ERROR_EVENT_NAME: &str = "error";
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pub static END_EVENT_NAME: &str = "end";
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/// Data returned on error event.
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/// The error event has a default handler that just logs that
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/// an error occurred. For a custom handler, register a handler on
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/// the [ERROR_EVENT_NAME] event.
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#[derive(Clone, Debug)]
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pub struct ErrorEventData {
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pub code: u16,
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pub message: String,
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}
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impl Error for ErrorEventData {}
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impl Display for ErrorEventData {
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fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
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write!(f, "IPC Code {}: '{}'", self.code, self.message)
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}
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}
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impl IntoPayload for ErrorEventData {
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fn into_payload(self, _: &Context) -> IPCResult<Bytes> {
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let mut buf = BytesMut::new();
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buf.put_u16(self.code);
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buf.put_u32(self.message.len() as u32);
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buf.put(Bytes::from(self.message));
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Ok(buf.freeze())
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}
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}
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impl FromPayload for ErrorEventData {
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fn from_payload<R: Read>(mut reader: R) -> Result<Self> {
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let code = reader.read_u16::<BigEndian>()?;
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let message_len = reader.read_u32::<BigEndian>()?;
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let mut message_buf = vec![0u8; message_len as usize];
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reader.read_exact(&mut message_buf)?;
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let message = String::from_utf8(message_buf).map_err(|_| IPCError::CorruptedEvent)?;
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Ok(ErrorEventData { code, message })
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}
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}
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