Enum Error 

pub enum Error {
    InvalidBaseUrl(ParseError),
    Transport(String),
    Http {
        status: StatusCode,
        status_text: String,
        message: String,
        body: Option<Bytes>,
    },
    Deserialize {
        status: StatusCode,
        message: String,
        body: Option<Bytes>,
    },
    Timeout,
    Cancelled,
    MissingBaseUrl,
    RetryExhausted {
        attempts: u32,
        last: Option<String>,
    },
    Hook(String),
    Other(String),
}

Error type for better-fetch operations.

Variants

InvalidBaseUrl(ParseError)

Base URL parsing failed (ClientBuilder::base_url).

Transport(String)

Underlying transport failure (connection, DNS, etc.).

Http

Non-success HTTP response (when using throw mode or send_json).

Fields

status: StatusCode

HTTP status code.

status_text: String

Canonical reason phrase.

message: String

Human-readable message.

body: Option<Bytes>

Response body when buffered.

Deserialize

JSON response could not be deserialized (feature json).

Fields

status: StatusCode

message: String

body: Option<Bytes>

Timeout

Request exceeded the configured timeout.

Cancelled

Request was cancelled via CancellationToken.

MissingBaseUrl

ClientBuilder::build without ClientBuilder::base_url.

RetryExhausted

Transport retries were exhausted.

Fields

attempts: u32

Total attempts made (initial + retries).

last: Option<String>

Stringified last error, when available.

Hook(String)

Returned from on_request or on_response to abort the pipeline. Prefer constructing this with Error::hook rather than Error::Other.

Other(String)

Catch-all for configuration or plugin errors.

Implementations

impl Error

pub fn http( status: StatusCode, message: impl Into<String>, body: Option<Bytes>, ) -> Self

Builds an HTTP error with canonical status text.

pub fn http_with_status_text( status: StatusCode, status_text: impl Into<String>, message: impl Into<String>, body: Option<Bytes>, ) -> Self

Builds an HTTP error with explicit status text.

pub fn status(&self) -> Option<StatusCode>

Returns the HTTP status when this error is response-related.

pub fn status_text(&self) -> Option<&str>

Returns the canonical status text for Error::Http.

pub fn body(&self) -> Option<&Bytes>

Returns the response body when present on HTTP, deserialize, or validation errors.

pub fn is_retry_exhausted(&self) -> bool

Returns true when transport retries were configured but all attempts failed.

pub fn is_cancelled(&self) -> bool

Returns true when the request was cancelled via CancellationToken.

pub fn hook(msg: impl Into<String>) -> Self

Builds a hook failure for Hooks::on_request / Hooks::on_response.

pub fn is_hook(&self) -> bool

Returns true when the error is Error::Hook.

pub fn api_json<T: DeserializeOwned>(&self) -> Option<T>

Parses the error response body as JSON (for API error payloads).

Examples

use better_fetch::Error;
use http::StatusCode;
use serde::Deserialize;

#[derive(Debug, Deserialize, PartialEq)]
struct ApiError {
    message: String,
}

let err = Error::http_with_status_text(
    StatusCode::BAD_REQUEST,
    "Bad Request",
    "bad request",
    Some(bytes::Bytes::from_static(br#"{"message":"invalid"}"#)),
);
let api: ApiError = err.api_json().unwrap();
assert_eq!(api.message, "invalid");

Trait Implementations

impl Clone for Error

fn clone(&self) -> Error

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Error

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Display for Error

fn fmt(&self, __formatter: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Error for Error

fn source(&self) -> Option<&(dyn Error + 'static)>

Returns the lower-level source of this error, if any.

fn description(&self) -> &str

👎Deprecated since 1.42.0:

use the Display impl or to_string()

fn cause(&self) -> Option<&dyn Error>

👎Deprecated since 1.33.0:

replaced by Error::source, which can support downcasting

fn provide<'a>(&'a self, request: &mut Request<'a>)

🔬This is a nightly-only experimental API. (error_generic_member_access)

Provides type-based access to context intended for error reports.

impl From<ParseError> for Error

fn from(source: ParseError) -> Self

Converts to this type from the input type.