web-fetcher-plugin

"use strict";
var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
    if (k2 === undefined) k2 = k;
    var desc = Object.getOwnPropertyDescriptor(m, k);
    if (!desc || ("get" in desc ? !m.__esModule : desc.writable || desc.configurable)) {
      desc = { enumerable: true, get: function() { return m[k]; } };
    }
    Object.defineProperty(o, k2, desc);
}) : (function(o, m, k, k2) {
    if (k2 === undefined) k2 = k;
    o[k2] = m[k];
}));
var __setModuleDefault = (this && this.__setModuleDefault) || (Object.create ? (function(o, v) {
    Object.defineProperty(o, "default", { enumerable: true, value: v });
}) : function(o, v) {
    o["default"] = v;
});
var __importStar = (this && this.__importStar) || (function () {
    var ownKeys = function(o) {
        ownKeys = Object.getOwnPropertyNames || function (o) {
            var ar = [];
            for (var k in o) if (Object.prototype.hasOwnProperty.call(o, k)) ar[ar.length] = k;
            return ar;
        };
        return ownKeys(o);
    };
    return function (mod) {
        if (mod && mod.__esModule) return mod;
        var result = {};
        if (mod != null) for (var k = ownKeys(mod), i = 0; i < k.length; i++) if (k[i] !== "default") __createBinding(result, mod, k[i]);
        __setModuleDefault(result, mod);
        return result;
    };
})();
var __importDefault = (this && this.__importDefault) || function (mod) {
    return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.fetchWebpage = fetchWebpage;
exports.fetchAndClean = fetchAndClean;
const node_fetch_1 = __importDefault(require("node-fetch"));
let lastRequestTime = 0;
async function delay(ms) {
    return new Promise((resolve) => setTimeout(resolve, ms));
}
async function fetchWebpage(url, config) {
    try {
        // Validate URL
        const parsedUrl = new URL(url);
        // Apply rate limiting
        const delaySeconds = config.requestDelaySeconds || 2;
        const timeSinceLastRequest = Date.now() - lastRequestTime;
        if (timeSinceLastRequest < delaySeconds * 1000) {
            await delay(delaySeconds * 1000 - timeSinceLastRequest);
        }
        lastRequestTime = Date.now();
        // Fetch with retries
        let lastError = null;
        const maxRetries = config.maxRetries || 2;
        for (let attempt = 0; attempt <= maxRetries; attempt++) {
            try {
                const controller = new AbortController();
                const timeoutId = setTimeout(() => controller.abort(), 10000);
                const response = await (0, node_fetch_1.default)(url, {
                    headers: {
                        "User-Agent": config.userAgent || "Mozilla/5.0 (Windows NT 10.0; Win64; x64)",
                    },
                    signal: controller.signal,
                });
                clearTimeout(timeoutId);
                if (!response.ok) {
                    if (response.status >= 500 && attempt < maxRetries) {
                        // Retry on server error
                        await delay(1000 * (attempt + 1));
                        continue;
                    }
                    return {
                        success: false,
                        statusCode: response.status,
                        error: `HTTP ${response.status}: ${response.statusText}`,
                    };
                }
                const html = await response.text();
                return {
                    success: true,
                    html: html,
                    statusCode: response.status,
                };
            }
            catch (error) {
                lastError = error;
                if (attempt < maxRetries) {
                    // Retry on network error
                    await delay(1000 * (attempt + 1));
                    continue;
                }
            }
        }
        return {
            success: false,
            error: lastError?.message || "Failed to fetch webpage after retries",
        };
    }
    catch (error) {
        return {
            success: false,
            error: error instanceof Error ? error.message : String(error),
        };
    }
}
async function fetchAndClean(url, config) {
    const result = await fetchWebpage(url, config);
    if (!result.success || !result.html) {
        return {
            success: false,
            statusCode: result.statusCode,
            error: result.error,
        };
    }
    const cheerio = await Promise.resolve().then(() => __importStar(require("cheerio")));
    const $ = cheerio.load(result.html);
    // Extract title
    const title = $("title").text() || $('meta[property="og:title"]').attr("content") || "";
    // Remove script and style tags
    $("script").remove();
    $("style").remove();
    $("noscript").remove();
    // Extract and clean text
    let text = $("body").text();
    if (!text) {
        text = $.text();
    }
    // Clean whitespace
    text = text
        .replace(/\s+/g, " ")
        .replace(/\n+/g, " ")
        .trim();
    // Limit to 8000 characters
    if (text.length > 8000) {
        text = text.substring(0, 8000) + "...";
    }
    return {
        success: true,
        text: text,
        title: title,
        statusCode: result.statusCode,
    };
}
//# sourceMappingURL=fetcher.js.map