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use std::net::{IpAddr, Ipv4Addr};
use figment::{Figment, Profile, Provider, Metadata, error::Result};
use figment::providers::{Serialized, Env, Toml, Format};
use figment::value::{Map, Dict, magic::RelativePathBuf};
use serde::{Deserialize, Serialize};
use yansi::{Paint, Style, Color::Primary};
use crate::log::PaintExt;
use crate::config::{LogLevel, Shutdown, Ident};
use crate::request::{self, Request, FromRequest};
use crate::http::uncased::Uncased;
use crate::data::Limits;
#[cfg(feature = "tls")]
use crate::config::TlsConfig;
#[cfg(feature = "secrets")]
use crate::config::SecretKey;
/// Rocket server configuration.
///
/// See the [module level docs](crate::config) as well as the [configuration
/// guide] for further details.
///
/// [configuration guide]: https://rocket.rs/v0.5-rc/guide/configuration/
///
/// # Defaults
///
/// All configuration values have a default, documented in the [fields](#fields)
/// section below. [`Config::debug_default()`] returns the default values for
/// the debug profile while [`Config::release_default()`] the default values for
/// the release profile. The [`Config::default()`] method automatically selects
/// the appropriate of the two based on the selected profile. With the exception
/// of `log_level`, which is `normal` in `debug` and `critical` in `release`,
/// and `secret_key`, which is regenerated from a random value if not set in
/// "debug" mode only, all default values are identical in all profiles.
///
/// # Provider Details
///
/// `Config` is a Figment [`Provider`] with the following characteristics:
///
/// * **Profile**
///
/// The profile is set to the value of the `profile` field.
///
/// * **Metadata**
///
/// This provider is named `Rocket Config`. It does not specify a
/// [`Source`](figment::Source) and uses default interpolation.
///
/// * **Data**
///
/// The data emitted by this provider are the keys and values corresponding
/// to the fields and values of the structure. The dictionary is emitted to
/// the "default" meta-profile.
///
/// Note that these behaviors differ from those of [`Config::figment()`].
#[derive(Debug, Clone, PartialEq, Deserialize, Serialize)]
pub struct Config {
/// The selected profile. **(default: _debug_ `debug` / _release_ `release`)**
///
/// _**Note:** This field is never serialized nor deserialized. When a
/// `Config` is merged into a `Figment` as a `Provider`, this profile is
/// selected on the `Figment`. When a `Config` is extracted, this field is
/// set to the extracting Figment's selected `Profile`._
#[serde(skip)]
pub profile: Profile,
/// IP address to serve on. **(default: `127.0.0.1`)**
pub address: IpAddr,
/// Port to serve on. **(default: `8000`)**
pub port: u16,
/// Number of threads to use for executing futures. **(default: `num_cores`)**
///
/// _**Note:** Rocket only reads this value from sources in the [default
/// provider](Config::figment())._
pub workers: usize,
/// Limit on threads to start for blocking tasks. **(default: `512`)**
pub max_blocking: usize,
/// How, if at all, to identify the server via the `Server` header.
/// **(default: `"Rocket"`)**
pub ident: Ident,
/// The name of a header, whose value is typically set by an intermediary
/// server or proxy, which contains the real IP address of the connecting
/// client. Used internally and by [`Request::client_ip()`] and
/// [`Request::real_ip()`].
///
/// To disable using any header for this purpose, set this value to `false`.
/// Deserialization semantics are identical to those of [`Ident`] except
/// that the value must syntactically be a valid HTTP header name.
///
/// **(default: `"X-Real-IP"`)**
#[serde(deserialize_with = "crate::config::ip_header::deserialize")]
pub ip_header: Option<Uncased<'static>>,
/// Streaming read size limits. **(default: [`Limits::default()`])**
pub limits: Limits,
/// Directory to store temporary files in. **(default:
/// [`std::env::temp_dir()`])**
#[serde(serialize_with = "RelativePathBuf::serialize_relative")]
pub temp_dir: RelativePathBuf,
/// Keep-alive timeout in seconds; disabled when `0`. **(default: `5`)**
pub keep_alive: u32,
/// The TLS configuration, if any. **(default: `None`)**
#[cfg(feature = "tls")]
#[cfg_attr(nightly, doc(cfg(feature = "tls")))]
pub tls: Option<TlsConfig>,
/// The secret key for signing and encrypting. **(default: `0`)**
///
/// _**Note:** This field _always_ serializes as a 256-bit array of `0`s to
/// aid in preventing leakage of the secret key._
#[cfg(feature = "secrets")]
#[cfg_attr(nightly, doc(cfg(feature = "secrets")))]
#[serde(serialize_with = "SecretKey::serialize_zero")]
pub secret_key: SecretKey,
/// Graceful shutdown configuration. **(default: [`Shutdown::default()`])**
pub shutdown: Shutdown,
/// Max level to log. **(default: _debug_ `normal` / _release_ `critical`)**
pub log_level: LogLevel,
/// Whether to use colors and emoji when logging. **(default: `true`)**
#[serde(deserialize_with = "figment::util::bool_from_str_or_int")]
pub cli_colors: bool,
/// PRIVATE: This structure may grow (but never change otherwise) in a
/// non-breaking release. As such, constructing this structure should
/// _always_ be done using a public constructor or update syntax:
///
/// ```rust
/// use rocket::Config;
///
/// let config = Config {
/// port: 1024,
/// keep_alive: 10,
/// ..Default::default()
/// };
/// ```
#[doc(hidden)]
#[serde(skip)]
pub __non_exhaustive: (),
}
impl Default for Config {
/// Returns the default configuration based on the Rust compilation profile.
/// This is [`Config::debug_default()`] in `debug` and
/// [`Config::release_default()`] in `release`.
///
/// # Example
///
/// ```rust
/// use rocket::Config;
///
/// let config = Config::default();
/// ```
fn default() -> Config {
#[cfg(debug_assertions)] { Config::debug_default() }
#[cfg(not(debug_assertions))] { Config::release_default() }
}
}
impl Config {
const DEPRECATED_KEYS: &'static [(&'static str, Option<&'static str>)] = &[
("env", Some(Self::PROFILE)), ("log", Some(Self::LOG_LEVEL)),
("read_timeout", None), ("write_timeout", None),
];
const DEPRECATED_PROFILES: &'static [(&'static str, Option<&'static str>)] = &[
("dev", Some("debug")), ("prod", Some("release")), ("stag", None)
];
/// Returns the default configuration for the `debug` profile, _irrespective
/// of the Rust compilation profile_ and `ROCKET_PROFILE`.
///
/// This may differ from the configuration used by default,
/// [`Config::default()`], which is selected based on the Rust compilation
/// profile. See [defaults](#defaults) and [provider
/// details](#provider-details) for specifics.
///
/// # Example
///
/// ```rust
/// use rocket::Config;
///
/// let config = Config::debug_default();
/// ```
pub fn debug_default() -> Config {
Config {
profile: Self::DEBUG_PROFILE,
address: Ipv4Addr::new(127, 0, 0, 1).into(),
port: 8000,
workers: num_cpus::get(),
max_blocking: 512,
ident: Ident::default(),
ip_header: Some(Uncased::from_borrowed("X-Real-IP")),
limits: Limits::default(),
temp_dir: std::env::temp_dir().into(),
keep_alive: 5,
#[cfg(feature = "tls")]
tls: None,
#[cfg(feature = "secrets")]
secret_key: SecretKey::zero(),
shutdown: Shutdown::default(),
log_level: LogLevel::Normal,
cli_colors: true,
__non_exhaustive: (),
}
}
/// Returns the default configuration for the `release` profile,
/// _irrespective of the Rust compilation profile_ and `ROCKET_PROFILE`.
///
/// This may differ from the configuration used by default,
/// [`Config::default()`], which is selected based on the Rust compilation
/// profile. See [defaults](#defaults) and [provider
/// details](#provider-details) for specifics.
///
/// # Example
///
/// ```rust
/// use rocket::Config;
///
/// let config = Config::release_default();
/// ```
pub fn release_default() -> Config {
Config {
profile: Self::RELEASE_PROFILE,
log_level: LogLevel::Critical,
..Config::debug_default()
}
}
/// Returns the default provider figment used by [`rocket::build()`].
///
/// The default figment reads from the following sources, in ascending
/// priority order:
///
/// 1. [`Config::default()`] (see [defaults](#defaults))
/// 2. `Rocket.toml` _or_ filename in `ROCKET_CONFIG` environment variable
/// 3. `ROCKET_` prefixed environment variables
///
/// The profile selected is the value set in the `ROCKET_PROFILE`
/// environment variable. If it is not set, it defaults to `debug` when
/// compiled in debug mode and `release` when compiled in release mode.
///
/// [`rocket::build()`]: crate::build()
///
/// # Example
///
/// ```rust
/// use rocket::Config;
/// use serde::Deserialize;
///
/// #[derive(Deserialize)]
/// struct MyConfig {
/// app_key: String,
/// }
///
/// let my_config = Config::figment().extract::<MyConfig>();
/// ```
pub fn figment() -> Figment {
Figment::from(Config::default())
.merge(Toml::file(Env::var_or("ROCKET_CONFIG", "Rocket.toml")).nested())
.merge(Env::prefixed("ROCKET_").ignore(&["PROFILE"]).global())
.select(Profile::from_env_or("ROCKET_PROFILE", Self::DEFAULT_PROFILE))
}
/// Attempts to extract a `Config` from `provider`, returning the result.
///
/// # Example
///
/// ```rust
/// use rocket::Config;
/// use rocket::figment::providers::{Toml, Format, Env};
///
/// // Use Rocket's default `Figment`, but allow values from `MyApp.toml`
/// // and `MY_APP_` prefixed environment variables to supersede its values.
/// let figment = Config::figment()
/// .merge(("some-thing", 123))
/// .merge(Env::prefixed("CONFIG_"));
///
/// let config = Config::try_from(figment);
/// ```
pub fn try_from<T: Provider>(provider: T) -> Result<Self> {
let figment = Figment::from(provider);
let mut config = figment.extract::<Self>()?;
config.profile = figment.profile().clone();
Ok(config)
}
/// Extract a `Config` from `provider`, panicking if extraction fails.
///
/// # Panics
///
/// If extraction fails, prints an error message indicating the failure and
/// panics. For a version that doesn't panic, use [`Config::try_from()`].
///
/// # Example
///
/// ```rust
/// use rocket::Config;
/// use rocket::figment::providers::{Toml, Format, Env};
///
/// // Use Rocket's default `Figment`, but allow values from `MyApp.toml`
/// // and `MY_APP_` prefixed environment variables to supersede its values.
/// let figment = Config::figment()
/// .merge(Toml::file("MyApp.toml").nested())
/// .merge(Env::prefixed("MY_APP_"));
///
/// let config = Config::from(figment);
/// ```
pub fn from<T: Provider>(provider: T) -> Self {
Self::try_from(provider).unwrap_or_else(bail_with_config_error)
}
/// Returns `true` if TLS is enabled.
///
/// TLS is enabled when the `tls` feature is enabled and TLS has been
/// configured with at least one ciphersuite. Note that without changing
/// defaults, all supported ciphersuites are enabled in the recommended
/// configuration.
///
/// # Example
///
/// ```rust
/// let config = rocket::Config::default();
/// if config.tls_enabled() {
/// println!("TLS is enabled!");
/// } else {
/// println!("TLS is disabled.");
/// }
/// ```
pub fn tls_enabled(&self) -> bool {
#[cfg(feature = "tls")] {
self.tls.as_ref().map_or(false, |tls| !tls.ciphers.is_empty())
}
#[cfg(not(feature = "tls"))] { false }
}
/// Returns `true` if mTLS is enabled.
///
/// mTLS is enabled when TLS is enabled ([`Config::tls_enabled()`]) _and_
/// the `mtls` feature is enabled _and_ mTLS has been configured with a CA
/// certificate chain.
///
/// # Example
///
/// ```rust
/// let config = rocket::Config::default();
/// if config.mtls_enabled() {
/// println!("mTLS is enabled!");
/// } else {
/// println!("mTLS is disabled.");
/// }
/// ```
pub fn mtls_enabled(&self) -> bool {
if !self.tls_enabled() {
return false;
}
#[cfg(feature = "mtls")] {
self.tls.as_ref().map_or(false, |tls| tls.mutual.is_some())
}
#[cfg(not(feature = "mtls"))] { false }
}
#[cfg(feature = "secrets")]
pub(crate) fn known_secret_key_used(&self) -> bool {
const KNOWN_SECRET_KEYS: &'static [&'static str] = &[
"hPRYyVRiMyxpw5sBB1XeCMN1kFsDCqKvBi2QJxBVHQk="
];
KNOWN_SECRET_KEYS.iter().any(|&key_str| {
let value = figment::value::Value::from(key_str);
self.secret_key == value.deserialize().expect("known key is valid")
})
}
#[inline]
pub(crate) fn trace_print(&self, figment: &Figment) {
if self.log_level != LogLevel::Debug {
return;
}
trace!("-- configuration trace information --");
for param in Self::PARAMETERS {
if let Some(meta) = figment.find_metadata(param) {
let (param, name) = (param.blue(), meta.name.primary());
if let Some(ref source) = meta.source {
trace_!("{:?} parameter source: {} ({})", param, name, source);
} else {
trace_!("{:?} parameter source: {}", param, name);
}
}
}
}
pub(crate) fn pretty_print(&self, figment: &Figment) {
static VAL: Style = Primary.bold();
self.trace_print(figment);
launch_meta!("{}Configured for {}.", "🔧 ".emoji(), self.profile.underline());
launch_meta_!("address: {}", self.address.paint(VAL));
launch_meta_!("port: {}", self.port.paint(VAL));
launch_meta_!("workers: {}", self.workers.paint(VAL));
launch_meta_!("max blocking threads: {}", self.max_blocking.paint(VAL));
launch_meta_!("ident: {}", self.ident.paint(VAL));
match self.ip_header {
Some(ref name) => launch_meta_!("IP header: {}", name.paint(VAL)),
None => launch_meta_!("IP header: {}", "disabled".paint(VAL))
}
launch_meta_!("limits: {}", (&self.limits).paint(VAL));
launch_meta_!("temp dir: {}", self.temp_dir.relative().display().paint(VAL));
launch_meta_!("http/2: {}", (cfg!(feature = "http2").paint(VAL)));
match self.keep_alive {
0 => launch_meta_!("keep-alive: {}", "disabled".paint(VAL)),
ka => launch_meta_!("keep-alive: {}{}", ka.paint(VAL), "s".paint(VAL)),
}
match (self.tls_enabled(), self.mtls_enabled()) {
(true, true) => launch_meta_!("tls: {}", "enabled w/mtls".paint(VAL)),
(true, false) => launch_meta_!("tls: {} w/o mtls", "enabled".paint(VAL)),
(false, _) => launch_meta_!("tls: {}", "disabled".paint(VAL)),
}
launch_meta_!("shutdown: {}", self.shutdown.paint(VAL));
launch_meta_!("log level: {}", self.log_level.paint(VAL));
launch_meta_!("cli colors: {}", self.cli_colors.paint(VAL));
// Check for now deprecated config values.
for (key, replacement) in Self::DEPRECATED_KEYS {
if let Some(md) = figment.find_metadata(key) {
warn!("found value for deprecated config key `{}`", key.paint(VAL));
if let Some(ref source) = md.source {
launch_meta_!("in {} {}", source.paint(VAL), md.name);
}
if let Some(new_key) = replacement {
launch_meta_!("key has been by replaced by `{}`", new_key.paint(VAL));
} else {
launch_meta_!("key has no special meaning");
}
}
}
// Check for now removed config values.
for (prefix, replacement) in Self::DEPRECATED_PROFILES {
if let Some(profile) = figment.profiles().find(|p| p.starts_with(prefix)) {
warn!("found set deprecated profile `{}`", profile.paint(VAL));
if let Some(new_profile) = replacement {
launch_meta_!("profile was replaced by `{}`", new_profile.paint(VAL));
} else {
launch_meta_!("profile `{}` has no special meaning", profile);
}
}
}
#[cfg(feature = "secrets")] {
launch_meta_!("secret key: {}", self.secret_key.paint(VAL));
if !self.secret_key.is_provided() {
warn!("secrets enabled without a stable `secret_key`");
launch_meta_!("disable `secrets` feature or configure a `secret_key`");
launch_meta_!("this becomes an {} in non-debug profiles", "error".red());
}
}
}
}
/// Associated constants for default profiles.
impl Config {
/// The default debug profile: `debug`.
pub const DEBUG_PROFILE: Profile = Profile::const_new("debug");
/// The default release profile: `release`.
pub const RELEASE_PROFILE: Profile = Profile::const_new("release");
/// The default profile: "debug" on `debug`, "release" on `release`.
#[cfg(debug_assertions)]
pub const DEFAULT_PROFILE: Profile = Self::DEBUG_PROFILE;
/// The default profile: "debug" on `debug`, "release" on `release`.
#[cfg(not(debug_assertions))]
pub const DEFAULT_PROFILE: Profile = Self::RELEASE_PROFILE;
}
/// Associated constants for stringy versions of configuration parameters.
impl Config {
/// The stringy parameter name for setting/extracting [`Config::profile`].
///
/// This isn't `pub` because setting it directly does nothing.
const PROFILE: &'static str = "profile";
/// The stringy parameter name for setting/extracting [`Config::address`].
pub const ADDRESS: &'static str = "address";
/// The stringy parameter name for setting/extracting [`Config::port`].
pub const PORT: &'static str = "port";
/// The stringy parameter name for setting/extracting [`Config::workers`].
pub const WORKERS: &'static str = "workers";
/// The stringy parameter name for setting/extracting [`Config::max_blocking`].
pub const MAX_BLOCKING: &'static str = "max_blocking";
/// The stringy parameter name for setting/extracting [`Config::keep_alive`].
pub const KEEP_ALIVE: &'static str = "keep_alive";
/// The stringy parameter name for setting/extracting [`Config::ident`].
pub const IDENT: &'static str = "ident";
/// The stringy parameter name for setting/extracting [`Config::ip_header`].
pub const IP_HEADER: &'static str = "ip_header";
/// The stringy parameter name for setting/extracting [`Config::limits`].
pub const LIMITS: &'static str = "limits";
/// The stringy parameter name for setting/extracting [`Config::tls`].
pub const TLS: &'static str = "tls";
/// The stringy parameter name for setting/extracting [`Config::secret_key`].
pub const SECRET_KEY: &'static str = "secret_key";
/// The stringy parameter name for setting/extracting [`Config::temp_dir`].
pub const TEMP_DIR: &'static str = "temp_dir";
/// The stringy parameter name for setting/extracting [`Config::log_level`].
pub const LOG_LEVEL: &'static str = "log_level";
/// The stringy parameter name for setting/extracting [`Config::shutdown`].
pub const SHUTDOWN: &'static str = "shutdown";
/// The stringy parameter name for setting/extracting [`Config::cli_colors`].
pub const CLI_COLORS: &'static str = "cli_colors";
/// An array of all of the stringy parameter names.
pub const PARAMETERS: &'static [&'static str] = &[
Self::ADDRESS, Self::PORT, Self::WORKERS, Self::MAX_BLOCKING,
Self::KEEP_ALIVE, Self::IDENT, Self::IP_HEADER, Self::LIMITS, Self::TLS,
Self::SECRET_KEY, Self::TEMP_DIR, Self::LOG_LEVEL, Self::SHUTDOWN,
Self::CLI_COLORS,
];
}
impl Provider for Config {
#[track_caller]
fn metadata(&self) -> Metadata {
if self == &Config::default() {
Metadata::named("rocket::Config::default()")
} else {
Metadata::named("rocket::Config")
}
}
#[track_caller]
fn data(&self) -> Result<Map<Profile, Dict>> {
#[allow(unused_mut)]
let mut map: Map<Profile, Dict> = Serialized::defaults(self).data()?;
// We need to special-case `secret_key` since its serializer zeroes.
#[cfg(feature = "secrets")]
if !self.secret_key.is_zero() {
if let Some(map) = map.get_mut(&Profile::Default) {
map.insert("secret_key".into(), self.secret_key.key.master().into());
}
}
Ok(map)
}
fn profile(&self) -> Option<Profile> {
Some(self.profile.clone())
}
}
#[crate::async_trait]
impl<'r> FromRequest<'r> for &'r Config {
type Error = std::convert::Infallible;
async fn from_request(req: &'r Request<'_>) -> request::Outcome<Self, Self::Error> {
request::Outcome::Success(req.rocket().config())
}
}
#[doc(hidden)]
pub fn bail_with_config_error<T>(error: figment::Error) -> T {
pretty_print_error(error);
panic!("aborting due to configuration error(s)")
}
#[doc(hidden)]
pub fn pretty_print_error(error: figment::Error) {
use figment::error::{Kind, OneOf};
crate::log::init_default();
error!("Failed to extract valid configuration.");
for e in error {
fn w<T>(v: T) -> yansi::Painted<T> { Paint::new(v).primary() }
match e.kind {
Kind::Message(msg) => error_!("{}", msg),
Kind::InvalidType(v, exp) => {
error_!("invalid type: found {}, expected {}", w(v), w(exp));
}
Kind::InvalidValue(v, exp) => {
error_!("invalid value {}, expected {}", w(v), w(exp));
},
Kind::InvalidLength(v, exp) => {
error_!("invalid length {}, expected {}", w(v), w(exp))
},
Kind::UnknownVariant(v, exp) => {
error_!("unknown variant: found `{}`, expected `{}`", w(v), w(OneOf(exp)))
}
Kind::UnknownField(v, exp) => {
error_!("unknown field: found `{}`, expected `{}`", w(v), w(OneOf(exp)))
}
Kind::MissingField(v) => {
error_!("missing field `{}`", w(v))
}
Kind::DuplicateField(v) => {
error_!("duplicate field `{}`", w(v))
}
Kind::ISizeOutOfRange(v) => {
error_!("signed integer `{}` is out of range", w(v))
}
Kind::USizeOutOfRange(v) => {
error_!("unsigned integer `{}` is out of range", w(v))
}
Kind::Unsupported(v) => {
error_!("unsupported type `{}`", w(v))
}
Kind::UnsupportedKey(a, e) => {
error_!("unsupported type `{}` for key: must be `{}`", w(a), w(e))
}
}
if let (Some(ref profile), Some(ref md)) = (&e.profile, &e.metadata) {
if !e.path.is_empty() {
let key = md.interpolate(profile, &e.path);
info_!("for key {}", w(key));
}
}
if let Some(md) = e.metadata {
if let Some(source) = md.source {
info_!("in {} {}", w(source), md.name);
} else {
info_!("in {}", w(md.name));
}
}
}
}