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Viewing file:     index.js (1.26 KB)      -rw-r--r--

import { HttpRequest } from "@smithy/protocol-http";
const TRACE_ID_HEADER_NAME = "X-Amzn-Trace-Id";
const ENV_LAMBDA_FUNCTION_NAME = "AWS_LAMBDA_FUNCTION_NAME";
const ENV_TRACE_ID = "_X_AMZN_TRACE_ID";
export const recursionDetectionMiddleware = (options) => (next) => async (args) => {
    const { request } = args;
    if (!HttpRequest.isInstance(request) ||
        options.runtime !== "node" ||
        request.headers.hasOwnProperty(TRACE_ID_HEADER_NAME)) {
        return next(args);
    }
    const functionName = process.env[ENV_LAMBDA_FUNCTION_NAME];
    const traceId = process.env[ENV_TRACE_ID];
    const nonEmptyString = (str) => typeof str === "string" && str.length > 0;
    if (nonEmptyString(functionName) && nonEmptyString(traceId)) {
        request.headers[TRACE_ID_HEADER_NAME] = traceId;
    }
    return next({
        ...args,
        request,
    });
};
export const addRecursionDetectionMiddlewareOptions = {
    step: "build",
    tags: ["RECURSION_DETECTION"],
    name: "recursionDetectionMiddleware",
    override: true,
    priority: "low",
};
export const getRecursionDetectionPlugin = (options) => ({
    applyToStack: (clientStack) => {
        clientStack.add(recursionDetectionMiddleware(options), addRecursionDetectionMiddlewareOptions);
    },
});