chore: add Node Config Options

packages/middleware-flexible-checksums/package.json

@@ -28,6 +28,7 @@
   },
   "license": "Apache-2.0",
   "dependencies": {
+    "@smithy/node-config-provider": "^3.1.5",
     "@aws-crypto/crc32": "5.2.0",
     "@aws-crypto/crc32c": "5.2.0",
     "@aws-sdk/types": "*",

packages/middleware-flexible-checksums/src/NODE_REQUEST_CHECKSUM_CALCULATION_CONFIG_OPTIONS.ts

@@ -0,0 +1,16 @@
+import { LoadedConfigSelectors } from "@smithy/node-config-provider";
+
+import { RequestChecksumCalculation } from "./constants";
+import { SelectorType, stringUnionSelector } from "./stringUnionSelector";
+
+export const ENV_REQUEST_CHECKSUM_CALCULATION = "AWS_REQUEST_CHECKSUM_CALCULATION";
+export const CONFIG_REQUEST_CHECKSUM_CALCULATION = "request_checksum_calculation";
+export const DEFAULT_REQUEST_CHECKSUM_CALCULATION = RequestChecksumCalculation.WHEN_SUPPORTED;
+
+export const NODE_REQUEST_CHECKSUM_CALCULATION_CONFIG_OPTIONS: LoadedConfigSelectors<string> = {
+  environmentVariableSelector: (env) =>
+    stringUnionSelector(env, ENV_REQUEST_CHECKSUM_CALCULATION, RequestChecksumCalculation, SelectorType.ENV),
+  configFileSelector: (profile) =>
+    stringUnionSelector(profile, CONFIG_REQUEST_CHECKSUM_CALCULATION, RequestChecksumCalculation, SelectorType.CONFIG),
+  default: DEFAULT_REQUEST_CHECKSUM_CALCULATION,
+};

packages/middleware-flexible-checksums/src/NODE_RESPONSE_CHECKSUM_VALIDATION_CONFIG_OPTIONS.ts

@@ -0,0 +1,16 @@
+import { LoadedConfigSelectors } from "@smithy/node-config-provider";
+
+import { RequestChecksumCalculation } from "./constants";
+import { SelectorType, stringUnionSelector } from "./stringUnionSelector";
+
+export const ENV_RESPONSE_CHECKSUM_VALIDATION = "AWS_RESPONSE_CHECKSUM_VALIDATION";
+export const CONFIG_RESPONSE_CHECKSUM_VALIDATION = "response_checksum_validation";
+export const DEFAULT_RESPONSE_CHECKSUM_VALIDATION = RequestChecksumCalculation.WHEN_SUPPORTED;
+
+export const NODE_RESPONSE_CHECKSUM_VALIDATION_CONFIG_OPTIONS: LoadedConfigSelectors<string> = {
+  environmentVariableSelector: (env) =>
+    stringUnionSelector(env, ENV_RESPONSE_CHECKSUM_VALIDATION, RequestChecksumCalculation, SelectorType.ENV),
+  configFileSelector: (profile) =>
+    stringUnionSelector(profile, CONFIG_RESPONSE_CHECKSUM_VALIDATION, RequestChecksumCalculation, SelectorType.CONFIG),
+  default: DEFAULT_RESPONSE_CHECKSUM_VALIDATION,
+};