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[api-minor] Use the Fetch API, when supported, to load PDF documents in Node.js environments

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Given that modern Node.js versions now implement support for a fair number of "browser" APIs, we can utilize the standard Fetch API to load PDF documents that are specified via http/https URLs.

Please find compatibility information at:
 - https://developer.mozilla.org/en-US/docs/Web/API/Fetch_API#browser_compatibility
 - https://nodejs.org/dist/latest-v18.x/docs/api/globals.html#fetch
 - https://developer.mozilla.org/en-US/docs/Web/API/Response#browser_compatibility
 - https://nodejs.org/dist/latest-v18.x/docs/api/globals.html#response
This commit is contained in:
Jonas Jenwald 2024-02-21 16:04:13 +01:00
parent 72b8b29147
commit eded037d06
6 changed files with 123 additions and 54 deletions
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29
test/unit/api_spec.js
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@ -32,6 +32,7 @@ import {
import {
buildGetDocumentParams,
CMAP_URL,
createTemporaryNodeServer,
DefaultFileReaderFactory,
TEST_PDFS_PATH,
} from "./test_utils.js";
@ -67,13 +68,27 @@ describe("api", function () {
buildGetDocumentParams(tracemonkeyFileName);
let CanvasFactory;
let tempServer = null;
beforeAll(function () {
CanvasFactory = new DefaultCanvasFactory();
if (isNodeJS) {
tempServer = createTemporaryNodeServer();
}
});
afterAll(function () {
CanvasFactory = null;
if (isNodeJS) {
// Close the server from accepting new connections after all test
// finishes.
const { server } = tempServer;
server.close();
tempServer = null;
}
});
function waitSome(callback) {
@ -119,13 +134,10 @@ describe("api", function () {
});
it("creates pdf doc from URL-object", async function () {
if (isNodeJS) {
pending("window.location is not supported in Node.js.");
}
const urlObj = new URL(
TEST_PDFS_PATH + basicApiFileName,
window.location
);
const urlObj = isNodeJS
? new URL(`http://127.0.0.1:${tempServer.port}/${basicApiFileName}`)
: new URL(TEST_PDFS_PATH + basicApiFileName, window.location);
const loadingTask = getDocument(urlObj);
expect(loadingTask instanceof PDFDocumentLoadingTask).toEqual(true);
const pdfDocument = await loadingTask.promise;
@ -134,6 +146,9 @@ describe("api", function () {
expect(pdfDocument instanceof PDFDocumentProxy).toEqual(true);
expect(pdfDocument.numPages).toEqual(3);
// Ensure that the Fetch API was used to load the PDF document.
expect(pdfDocument.getNetworkStreamName()).toEqual("PDFFetchStream");
await loadingTask.destroy();
});