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839c257f87
This should help reduce the maintenance burden of the code, since you no longer need to remember to update separate code when touching the different `DownloadManager` classes.
65 lines
2.3 KiB
JavaScript
65 lines
2.3 KiB
JavaScript
/* Copyright 2013 Mozilla Foundation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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import { BaseDownloadManager } from "./base_download_manager.js";
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import { createValidAbsoluteUrl } from "pdfjs-lib";
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if (typeof PDFJSDev !== "undefined" && !PDFJSDev.test("CHROME || GENERIC")) {
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throw new Error(
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'Module "pdfjs-web/download_manager" shall not be used ' +
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"outside CHROME and GENERIC builds."
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);
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}
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class DownloadManager extends BaseDownloadManager {
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_triggerDownload(blobUrl, originalUrl, filename, isAttachment = false) {
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if (!blobUrl && !isAttachment) {
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// Fallback to downloading non-attachments by their URL.
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if (!createValidAbsoluteUrl(originalUrl, "http://example.com")) {
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throw new Error(`_triggerDownload - not a valid URL: ${originalUrl}`);
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}
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blobUrl = originalUrl + "#pdfjs.action=download";
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}
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const a = document.createElement("a");
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a.href = blobUrl;
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a.target = "_parent";
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// Use a.download if available. This increases the likelihood that
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// the file is downloaded instead of opened by another PDF plugin.
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if ("download" in a) {
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a.download = filename;
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}
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// <a> must be in the document for recent Firefox versions,
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// otherwise .click() is ignored.
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(document.body || document.documentElement).append(a);
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a.click();
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a.remove();
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}
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_getOpenDataUrl(blobUrl, filename, dest = null) {
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if (typeof PDFJSDev !== "undefined" && PDFJSDev.test("COMPONENTS")) {
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throw new Error("Opening data is not supported in `COMPONENTS` builds.");
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}
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// The current URL is the viewer, let's use it and append the file.
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let url = "?file=" + encodeURIComponent(blobUrl + "#" + filename);
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if (dest) {
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url += `#${escape(dest)}`;
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}
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return url;
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}
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}
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export { DownloadManager };
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