Enum fcm::FcmError

pub enum FcmError {
    Unauthorized,
    InvalidMessage(String),
    ServerError(Option<RetryAfter>),
}

Fatal errors. Referred from Firebase documentation

Variants

Unauthorized

The sender account used to send a message couldn’t be authenticated. Possible causes are:

Authorization header missing or with invalid syntax in HTTP request.

• The Firebase project that the specified server key belongs to is incorrect.
• Legacy server keys only—the request originated from a server not whitelisted in the Server key IPs.

Check that the token you’re sending inside the Authentication header is the correct Server key associated with your project. See Checking the validity of a Server key for details. If you are using a legacy server key, you’re recommended to upgrade to a new key that has no IP restrictions.

InvalidMessage(String)

Check that the JSON message is properly formatted and contains valid fields (for instance, making sure the right data type is passed in).

ServerError(Option<RetryAfter>)

The server couldn’t process the request. Retry the same request, but you must:

• Honor the RetryAfter value if included.
• Implement exponential back-off in your retry mechanism. (e.g. if you waited one second before the first retry, wait at least two second before the next one, then 4 seconds and so on). If you’re sending multiple messages, delay each one independently by an additional random amount to avoid issuing a new request for all messages at the same time.

Senders that cause problems risk being blacklisted.

Trait Implementations

impl Debug for FcmError

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

Formats the value using the given formatter.

impl Display for FcmError

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

Formats the value using the given formatter.

impl Error for FcmError

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

The lower-level source of this error, if any.

pub fn backtrace(&self) -> Option<&Backtrace>

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

Returns a stack backtrace, if available, of where this error occurred.

pub fn description(&self) -> &str

👎 Deprecated since 1.42.0:

use the Display impl or to_string()

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

👎 Deprecated since 1.33.0:

replaced by Error::source, which can support downcasting

impl From<Error> for FcmError

fn from(_: Error) -> Self

Performs the conversion.

impl PartialEq<FcmError> for FcmError

fn eq(&self, other: &FcmError) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &FcmError) -> bool

This method tests for !=.

impl StructuralPartialEq for FcmError