pdfmake/js/URLResolver.js

Client/server side PDF printing in pure JavaScript

"use strict";

exports.__esModule = true;
exports.default = void 0;
async function fetchUrl(url, headers = {}) {
  try {
    const response = await fetch(url, {
      headers
    });
    if (!response.ok) {
      throw new Error(`Failed to fetch (status code: ${response.status}, url: "${url}")`);
    }
    return await response.arrayBuffer();
  } catch (error) {
    throw new Error(`Network request failed (url: "${url}", error: ${error.message})`);
  }
}
class URLResolver {
  constructor(fs) {
    this.fs = fs;
    this.resolving = {};
  }
  resolve(url, headers = {}) {
    const resolveUrlInternal = async () => {
      if (url.toLowerCase().startsWith('https://') || url.toLowerCase().startsWith('http://')) {
        if (this.fs.existsSync(url)) {
          return; // url was downloaded earlier
        }
        const buffer = await fetchUrl(url, headers);
        this.fs.writeFileSync(url, buffer);
      }
      // else cannot be resolved
    };
    if (!this.resolving[url]) {
      this.resolving[url] = resolveUrlInternal();
    }
    return this.resolving[url];
  }
  resolved() {
    return Promise.all(Object.values(this.resolving));
  }
}
var _default = exports.default = URLResolver;