chore: add NODE_REQUEST_MIN_COMPRESSION_SIZE_BYTES

Author: trivikr

packages/middleware-compression/src/NODE_REQUEST_MIN_COMPRESSION_SIZE_BYTES.ts

@@ -0,0 +1,38 @@
+import { LoadedConfigSelectors } from "@smithy/node-config-provider";
+import { SelectorType } from "@smithy/util-config-provider";
+
+/**
+ * @internal
+ */
+export const NODE_REQUEST_MIN_COMPRESSION_SIZE_BYTES_ENV_NAME = "AWS_REQUEST_MIN_COMPRESSION_SIZE_BYTES";
+
+/**
+ * @internal
+ */
+export const NODE_REQUEST_MIN_COMPRESSION_SIZE_BYTES_INI_NAME = "request_min_compression_size_bytes";
+
+/**
+ * ToDo: switch to using numberSelector from @smithy/util-config-provider once available.
+ * https://github.com/smithy-lang/smithy-typescript/pull/1126
+ */
+const numberSelector = (obj: Record<string, string | undefined>, key: string, type: SelectorType) => {
+  if (!(key in obj)) return undefined;
+
+  const numberValue = parseInt(obj[key] as string, 10);
+  if (Number.isNaN(numberValue)) {
+    throw new TypeError(`Cannot load ${type} '${key}'. Expected number, got '${obj[key]}'.`);
+  }
+
+  return numberValue;
+};
+
+/**
+ * @internal
+ */
+export const NODE_REQUEST_MIN_COMPRESSION_SIZE_BYTES_CONFIG_OPTIONS: LoadedConfigSelectors<number> = {
+  environmentVariableSelector: (env: NodeJS.ProcessEnv) =>
+    numberSelector(env, NODE_REQUEST_MIN_COMPRESSION_SIZE_BYTES_ENV_NAME, SelectorType.ENV),
+  configFileSelector: (profile) =>
+    numberSelector(profile, NODE_REQUEST_MIN_COMPRESSION_SIZE_BYTES_INI_NAME, SelectorType.CONFIG),
+  default: 10240,
+};

packages/middleware-compression/src/index.ts

@@ -1,4 +1,5 @@
 export * from "./NODE_DISABLE_REQUEST_COMPRESSION_CONFIG_OPTIONS";
+export * from "./NODE_REQUEST_MIN_COMPRESSION_SIZE_BYTES_CONFIG_OPTIONS";
 export * from "./compressionMiddleware";
 export * from "./configurations";
 export * from "./resolveCompressionConfig";