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Viewing file:     Script.js (2.49 KB)      -rw-r--r--

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
const crypto_1 = require("crypto");
const Command_1 = require("./Command");
const standard_as_callback_1 = require("standard-as-callback");
class Script {
    constructor(lua, numberOfKeys = null, keyPrefix = "", readOnly = false) {
        this.lua = lua;
        this.numberOfKeys = numberOfKeys;
        this.keyPrefix = keyPrefix;
        this.readOnly = readOnly;
        this.sha = (0, crypto_1.createHash)("sha1").update(lua).digest("hex");
        const sha = this.sha;
        const socketHasScriptLoaded = new WeakSet();
        this.Command = class CustomScriptCommand extends Command_1.default {
            toWritable(socket) {
                const origReject = this.reject;
                this.reject = (err) => {
                    if (err.message.indexOf("NOSCRIPT") !== -1) {
                        socketHasScriptLoaded.delete(socket);
                    }
                    origReject.call(this, err);
                };
                if (!socketHasScriptLoaded.has(socket)) {
                    socketHasScriptLoaded.add(socket);
                    this.name = "eval";
                    this.args[0] = lua;
                }
                else if (this.name === "eval") {
                    this.name = "evalsha";
                    this.args[0] = sha;
                }
                return super.toWritable(socket);
            }
        };
    }
    execute(container, args, options, callback) {
        if (typeof this.numberOfKeys === "number") {
            args.unshift(this.numberOfKeys);
        }
        if (this.keyPrefix) {
            options.keyPrefix = this.keyPrefix;
        }
        if (this.readOnly) {
            options.readOnly = true;
        }
        const evalsha = new this.Command("evalsha", [this.sha, ...args], options);
        evalsha.promise = evalsha.promise.catch((err) => {
            if (err.message.indexOf("NOSCRIPT") === -1) {
                throw err;
            }
            // Resend the same custom evalsha command that gets transformed
            // to an eval in case it's not loaded yet on the connection.
            const resend = new this.Command("evalsha", [this.sha, ...args], options);
            const client = container.isPipeline ? container.redis : container;
            return client.sendCommand(resend);
        });
        (0, standard_as_callback_1.default)(evalsha.promise, callback);
        return container.sendCommand(evalsha);
    }
}
exports.default = Script;