danube_client/
errors.rs

1use base64::prelude::*;
2use prost::Message;
3use thiserror::Error;
4use tonic::{codegen::http::uri, Status};
5
6use danube_core::proto::{ErrorMessage, ErrorType};
7
8pub type Result<T> = std::result::Result<T, DanubeError>;
9
10#[derive(Debug, Error)]
11pub enum DanubeError {
12    #[error("transport error: {0}")]
13    TonicTransportError(#[from] tonic::transport::Error),
14
15    #[error("from status error: {0}, with message: {1:?}")]
16    FromStatus(tonic::Status, Option<ErrorMessage>),
17
18    #[error("unable to parse the address: {0}")]
19    UrlParseError(#[from] uri::InvalidUri),
20
21    #[error("unable to parse the address")]
22    ParseError,
23
24    #[error("unable to load the certificate: {0}")]
25    IoError(#[from] std::io::Error),
26
27    #[error("unable to perform operation: {0}")]
28    Unrecoverable(String),
29
30    #[error("invalid token")]
31    InvalidToken,
32}
33
34impl DanubeError {
35    pub fn extract_status(&self) -> Option<&tonic::Status> {
36        match self {
37            DanubeError::FromStatus(status, _) => Some(status),
38            _ => None,
39        }
40    }
41}
42
43pub(crate) fn decode_error_details(status: &Status) -> Option<ErrorMessage> {
44    if let Some(metadata_value) = status.metadata().get_bin("error-message-bin") {
45        let base64_buffer = metadata_value.as_encoded_bytes();
46
47        // Decode the base64 string to get the original bytes
48        let buffer = BASE64_STANDARD_NO_PAD.decode(base64_buffer).unwrap();
49
50        // Decode the protobuf message directly from the metadata bytes
51        match ErrorMessage::decode(&buffer[..]) {
52            Ok(error_message) => Some(error_message),
53            Err(err) => {
54                eprintln!("Error decoding error message: {}", err);
55                None
56            }
57        }
58    } else {
59        None
60    }
61}
62
63// A helper function to convert i32 to ErrorType.
64#[allow(dead_code)]
65pub(crate) fn error_type_from_i32(value: i32) -> Option<ErrorType> {
66    match value {
67        0 => Some(ErrorType::UnknownError),
68        1 => Some(ErrorType::InvalidTopicName),
69        2 => Some(ErrorType::TopicNotFound),
70        3 => Some(ErrorType::ServiceNotReady),
71        4 => Some(ErrorType::ProducerAlreadyExists),
72        5 => Some(ErrorType::SubscribePermissionDenied),
73        6 => Some(ErrorType::SubscriptionNotFound),
74        _ => None,
75    }
76}
danube_client/errors.rs

danube_client/
errors.rs
