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6eca1da818
Now that nsIRemoteAgent propagates errors correctly to Rust we can report errors back to the user when something terrible happens. The effect of all this is that the startup handler can stop Firefox when the remote agent fails to listen. Differential Revision: https://phabricator.services.mozilla.com/D55178 --HG-- extra : moz-landing-system : lando
77 lines
2.2 KiB
Rust
77 lines
2.2 KiB
Rust
// This Source Code Form is subject to the terms of the Mozilla Public
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// License, v. 2.0. If a copy of the MPL was not distributed with this
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// file, You can obtain one at http://mozilla.org/MPL/2.0/.
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use std::num;
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use failure::Fail;
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use http;
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use nserror::{
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nsresult, NS_ERROR_ILLEGAL_VALUE, NS_ERROR_INVALID_ARG, NS_ERROR_LAUNCHED_CHILD_PROCESS,
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NS_ERROR_NOT_AVAILABLE,
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};
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#[derive(Debug, Fail)]
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pub enum RemoteAgentError {
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#[fail(display = "expected address syntax [<host>]:<port>: {}", _0)]
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AddressSpec(http::uri::InvalidUri),
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#[fail(display = "may only be instantiated in parent process")]
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ChildProcess,
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#[fail(display = "conflicting flags --remote-debugger and --remote-debugging-port")]
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FlagConflict,
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#[fail(display = "invalid port: {}", _0)]
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InvalidPort(num::ParseIntError),
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#[fail(display = "listener restricted to loopback devices")]
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LoopbackRestricted,
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#[fail(display = "missing port number")]
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MissingPort,
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#[fail(display = "unavailable")]
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Unavailable,
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#[fail(display = "error result {}", _0)]
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XpCom(nsresult),
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}
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impl From<RemoteAgentError> for nsresult {
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fn from(err: RemoteAgentError) -> nsresult {
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use RemoteAgentError::*;
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match err {
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AddressSpec(_) | InvalidPort(_) => NS_ERROR_INVALID_ARG,
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ChildProcess => NS_ERROR_LAUNCHED_CHILD_PROCESS,
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LoopbackRestricted => NS_ERROR_ILLEGAL_VALUE,
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MissingPort | FlagConflict => NS_ERROR_INVALID_ARG,
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Unavailable => NS_ERROR_NOT_AVAILABLE,
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XpCom(result) => result,
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}
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}
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}
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impl From<num::ParseIntError> for RemoteAgentError {
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fn from(err: num::ParseIntError) -> Self {
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RemoteAgentError::InvalidPort(err)
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}
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}
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impl From<http::uri::InvalidUri> for RemoteAgentError {
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fn from(err: http::uri::InvalidUri) -> Self {
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RemoteAgentError::AddressSpec(err)
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}
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}
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impl From<nsresult> for RemoteAgentError {
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fn from(result: nsresult) -> Self {
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use RemoteAgentError::*;
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match result {
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NS_ERROR_NOT_AVAILABLE => Unavailable,
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NS_ERROR_LAUNCHED_CHILD_PROCESS => ChildProcess,
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x => RemoteAgentError::XpCom(x),
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}
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}
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}
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