75 lines
2.9 KiB
JavaScript
75 lines
2.9 KiB
JavaScript
'use strict';
|
|
|
|
var configResolver = require('@smithy/config-resolver');
|
|
var nodeConfigProvider = require('@smithy/node-config-provider');
|
|
var propertyProvider = require('@smithy/property-provider');
|
|
|
|
const AWS_EXECUTION_ENV = "AWS_EXECUTION_ENV";
|
|
const AWS_REGION_ENV = "AWS_REGION";
|
|
const AWS_DEFAULT_REGION_ENV = "AWS_DEFAULT_REGION";
|
|
const ENV_IMDS_DISABLED = "AWS_EC2_METADATA_DISABLED";
|
|
const DEFAULTS_MODE_OPTIONS = ["in-region", "cross-region", "mobile", "standard", "legacy"];
|
|
const IMDS_REGION_PATH = "/latest/meta-data/placement/region";
|
|
|
|
const AWS_DEFAULTS_MODE_ENV = "AWS_DEFAULTS_MODE";
|
|
const AWS_DEFAULTS_MODE_CONFIG = "defaults_mode";
|
|
const NODE_DEFAULTS_MODE_CONFIG_OPTIONS = {
|
|
environmentVariableSelector: (env) => {
|
|
return env[AWS_DEFAULTS_MODE_ENV];
|
|
},
|
|
configFileSelector: (profile) => {
|
|
return profile[AWS_DEFAULTS_MODE_CONFIG];
|
|
},
|
|
default: "legacy",
|
|
};
|
|
|
|
const resolveDefaultsModeConfig = ({ region = nodeConfigProvider.loadConfig(configResolver.NODE_REGION_CONFIG_OPTIONS), defaultsMode = nodeConfigProvider.loadConfig(NODE_DEFAULTS_MODE_CONFIG_OPTIONS), } = {}) => propertyProvider.memoize(async () => {
|
|
const mode = typeof defaultsMode === "function" ? await defaultsMode() : defaultsMode;
|
|
switch (mode?.toLowerCase()) {
|
|
case "auto":
|
|
return resolveNodeDefaultsModeAuto(region);
|
|
case "in-region":
|
|
case "cross-region":
|
|
case "mobile":
|
|
case "standard":
|
|
case "legacy":
|
|
return Promise.resolve(mode?.toLocaleLowerCase());
|
|
case undefined:
|
|
return Promise.resolve("legacy");
|
|
default:
|
|
throw new Error(`Invalid parameter for "defaultsMode", expect ${DEFAULTS_MODE_OPTIONS.join(", ")}, got ${mode}`);
|
|
}
|
|
});
|
|
const resolveNodeDefaultsModeAuto = async (clientRegion) => {
|
|
if (clientRegion) {
|
|
const resolvedRegion = typeof clientRegion === "function" ? await clientRegion() : clientRegion;
|
|
const inferredRegion = await inferPhysicalRegion();
|
|
if (!inferredRegion) {
|
|
return "standard";
|
|
}
|
|
if (resolvedRegion === inferredRegion) {
|
|
return "in-region";
|
|
}
|
|
else {
|
|
return "cross-region";
|
|
}
|
|
}
|
|
return "standard";
|
|
};
|
|
const inferPhysicalRegion = async () => {
|
|
if (process.env[AWS_EXECUTION_ENV] && (process.env[AWS_REGION_ENV] || process.env[AWS_DEFAULT_REGION_ENV])) {
|
|
return process.env[AWS_REGION_ENV] ?? process.env[AWS_DEFAULT_REGION_ENV];
|
|
}
|
|
if (!process.env[ENV_IMDS_DISABLED]) {
|
|
try {
|
|
const { getInstanceMetadataEndpoint, httpRequest } = await import('@smithy/credential-provider-imds');
|
|
const endpoint = await getInstanceMetadataEndpoint();
|
|
return (await httpRequest({ ...endpoint, path: IMDS_REGION_PATH })).toString();
|
|
}
|
|
catch (e) {
|
|
}
|
|
}
|
|
};
|
|
|
|
exports.resolveDefaultsModeConfig = resolveDefaultsModeConfig;
|