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use std::env::var as env_var;
use {AwsCredentials, CredentialsError, ProvideAwsCredentials, in_ten_minutes};
#[derive(Debug)]
pub struct EnvironmentProvider;
impl ProvideAwsCredentials for EnvironmentProvider {
fn credentials(&self) -> Result<AwsCredentials, CredentialsError> {
credentials_from_environment()
}
}
fn credentials_from_environment() -> Result<AwsCredentials, CredentialsError> {
let env_key = match env_var("AWS_ACCESS_KEY_ID") {
Ok(val) => val,
Err(_) => return Err(CredentialsError::new("No AWS_ACCESS_KEY_ID in environment"))
};
let env_secret = match env_var("AWS_SECRET_ACCESS_KEY") {
Ok(val) => val,
Err(_) => return Err(CredentialsError::new("No AWS_SECRET_ACCESS_KEY in environment"))
};
if env_key.is_empty() || env_secret.is_empty() {
return Err(CredentialsError::new("Couldn't find either AWS_ACCESS_KEY_ID, AWS_SECRET_ACCESS_KEY or both in environment."));
}
let token = match env_var("AWS_SESSION_TOKEN") {
Ok(val) => {
if val.is_empty() {
None
} else {
Some(val)
}
}
Err(_) => None,
};
Ok(AwsCredentials::new(env_key, env_secret, token, in_ten_minutes()))
}