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Viewing file:     node-http-handler.js (7.73 KB)      -rw-r--r--

import { HttpResponse } from "@smithy/protocol-http";
import { buildQueryString } from "@smithy/querystring-builder";
import { Agent as hAgent, request as hRequest } from "http";
import { Agent as hsAgent, request as hsRequest } from "https";
import { NODEJS_TIMEOUT_ERROR_CODES } from "./constants";
import { getTransformedHeaders } from "./get-transformed-headers";
import { setConnectionTimeout } from "./set-connection-timeout";
import { setSocketKeepAlive } from "./set-socket-keep-alive";
import { setSocketTimeout } from "./set-socket-timeout";
import { writeRequestBody } from "./write-request-body";
export const DEFAULT_REQUEST_TIMEOUT = 0;
export class NodeHttpHandler {
    static create(instanceOrOptions) {
        if (typeof instanceOrOptions?.handle === "function") {
            return instanceOrOptions;
        }
        return new NodeHttpHandler(instanceOrOptions);
    }
    static checkSocketUsage(agent, socketWarningTimestamp) {
        const { sockets, requests, maxSockets } = agent;
        if (typeof maxSockets !== "number" || maxSockets === Infinity) {
            return socketWarningTimestamp;
        }
        const interval = 15000;
        if (Date.now() - interval < socketWarningTimestamp) {
            return socketWarningTimestamp;
        }
        if (sockets && requests) {
            for (const origin in sockets) {
                const socketsInUse = sockets[origin]?.length ?? 0;
                const requestsEnqueued = requests[origin]?.length ?? 0;
                if (socketsInUse >= maxSockets && requestsEnqueued >= 2 * maxSockets) {
                    console.warn("@smithy/node-http-handler:WARN", `socket usage at capacity=${socketsInUse} and ${requestsEnqueued} additional requests are enqueued.`, "See https://docs.aws.amazon.com/sdk-for-javascript/v3/developer-guide/node-configuring-maxsockets.html", "or increase socketAcquisitionWarningTimeout=(millis) in the NodeHttpHandler config.");
                    return Date.now();
                }
            }
        }
        return socketWarningTimestamp;
    }
    constructor(options) {
        this.socketWarningTimestamp = 0;
        this.metadata = { handlerProtocol: "http/1.1" };
        this.configProvider = new Promise((resolve, reject) => {
            if (typeof options === "function") {
                options()
                    .then((_options) => {
                    resolve(this.resolveDefaultConfig(_options));
                })
                    .catch(reject);
            }
            else {
                resolve(this.resolveDefaultConfig(options));
            }
        });
    }
    resolveDefaultConfig(options) {
        const { requestTimeout, connectionTimeout, socketTimeout, httpAgent, httpsAgent } = options || {};
        const keepAlive = true;
        const maxSockets = 50;
        return {
            connectionTimeout,
            requestTimeout: requestTimeout ?? socketTimeout,
            httpAgent: (() => {
                if (httpAgent instanceof hAgent || typeof httpAgent?.destroy === "function") {
                    return httpAgent;
                }
                return new hAgent({ keepAlive, maxSockets, ...httpAgent });
            })(),
            httpsAgent: (() => {
                if (httpsAgent instanceof hsAgent || typeof httpsAgent?.destroy === "function") {
                    return httpsAgent;
                }
                return new hsAgent({ keepAlive, maxSockets, ...httpsAgent });
            })(),
        };
    }
    destroy() {
        this.config?.httpAgent?.destroy();
        this.config?.httpsAgent?.destroy();
    }
    async handle(request, { abortSignal } = {}) {
        if (!this.config) {
            this.config = await this.configProvider;
        }
        let socketCheckTimeoutId;
        return new Promise((_resolve, _reject) => {
            let writeRequestBodyPromise = undefined;
            const resolve = async (arg) => {
                await writeRequestBodyPromise;
                clearTimeout(socketCheckTimeoutId);
                _resolve(arg);
            };
            const reject = async (arg) => {
                await writeRequestBodyPromise;
                _reject(arg);
            };
            if (!this.config) {
                throw new Error("Node HTTP request handler config is not resolved");
            }
            if (abortSignal?.aborted) {
                const abortError = new Error("Request aborted");
                abortError.name = "AbortError";
                reject(abortError);
                return;
            }
            const isSSL = request.protocol === "https:";
            const agent = isSSL ? this.config.httpsAgent : this.config.httpAgent;
            socketCheckTimeoutId = setTimeout(() => {
                this.socketWarningTimestamp = NodeHttpHandler.checkSocketUsage(agent, this.socketWarningTimestamp);
            }, this.config.socketAcquisitionWarningTimeout ??
                (this.config.requestTimeout ?? 2000) + (this.config.connectionTimeout ?? 1000));
            const queryString = buildQueryString(request.query || {});
            let auth = undefined;
            if (request.username != null || request.password != null) {
                const username = request.username ?? "";
                const password = request.password ?? "";
                auth = `${username}:${password}`;
            }
            let path = request.path;
            if (queryString) {
                path += `?${queryString}`;
            }
            if (request.fragment) {
                path += `#${request.fragment}`;
            }
            const nodeHttpsOptions = {
                headers: request.headers,
                host: request.hostname,
                method: request.method,
                path,
                port: request.port,
                agent,
                auth,
            };
            const requestFunc = isSSL ? hsRequest : hRequest;
            const req = requestFunc(nodeHttpsOptions, (res) => {
                const httpResponse = new HttpResponse({
                    statusCode: res.statusCode || -1,
                    reason: res.statusMessage,
                    headers: getTransformedHeaders(res.headers),
                    body: res,
                });
                resolve({ response: httpResponse });
            });
            req.on("error", (err) => {
                if (NODEJS_TIMEOUT_ERROR_CODES.includes(err.code)) {
                    reject(Object.assign(err, { name: "TimeoutError" }));
                }
                else {
                    reject(err);
                }
            });
            setConnectionTimeout(req, reject, this.config.connectionTimeout);
            setSocketTimeout(req, reject, this.config.requestTimeout);
            if (abortSignal) {
                abortSignal.onabort = () => {
                    req.abort();
                    const abortError = new Error("Request aborted");
                    abortError.name = "AbortError";
                    reject(abortError);
                };
            }
            const httpAgent = nodeHttpsOptions.agent;
            if (typeof httpAgent === "object" && "keepAlive" in httpAgent) {
                setSocketKeepAlive(req, {
                    keepAlive: httpAgent.keepAlive,
                    keepAliveMsecs: httpAgent.keepAliveMsecs,
                });
            }
            writeRequestBodyPromise = writeRequestBody(req, request, this.config.requestTimeout).catch(_reject);
        });
    }
    updateHttpClientConfig(key, value) {
        this.config = undefined;
        this.configProvider = this.configProvider.then((config) => {
            return {
                ...config,
                [key]: value,
            };
        });
    }
    httpHandlerConfigs() {
        return this.config ?? {};
    }
}