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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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49
test/unit/node_stream_spec.js
View file

@ -14,6 +14,7 @@
*/
import { AbortException, isNodeJS } from "../../src/shared/util.js";
import { createTemporaryNodeServer } from "./test_utils.js";
import { PDFNodeStream } from "../../src/display/node_stream.js";
// Ensure that these tests only run in Node.js environments.
@ -25,12 +26,10 @@ if (!isNodeJS) {
const path = await __non_webpack_import__("path");
const url = await __non_webpack_import__("url");
const http = await __non_webpack_import__("http");
const fs = await __non_webpack_import__("fs");
describe("node_stream", function () {
let server = null;
let port = null;
let tempServer = null;
const pdf = url.parse(
encodeURI(
"file://" + path.join(process.cwd(), "./test/pdfs/tracemonkey.pdf")
@ -39,50 +38,20 @@ describe("node_stream", function () {
const pdfLength = 1016315;
beforeAll(function () {
// Create http server to serve pdf data for tests.
server = http
.createServer((request, response) => {
const filePath = process.cwd() + "/test/pdfs" + request.url;
fs.lstat(filePath, (error, stat) => {
if (error) {
response.writeHead(404);
response.end(`File ${request.url} not found!`);
return;
}
if (!request.headers.range) {
const contentLength = stat.size;
const stream = fs.createReadStream(filePath);
response.writeHead(200, {
"Content-Type": "application/pdf",
"Content-Length": contentLength,
"Accept-Ranges": "bytes",
});
stream.pipe(response);
} else {
const [start, end] = request.headers.range
.split("=")[1]
.split("-")
.map(x => Number(x));
const stream = fs.createReadStream(filePath, { start, end });
response.writeHead(206, {
"Content-Type": "application/pdf",
});
stream.pipe(response);
}
});
})
.listen(0); /* Listen on a random free port */
port = server.address().port;
tempServer = createTemporaryNodeServer();
});
afterAll(function () {
// Close the server from accepting new connections after all test finishes.
const { server } = tempServer;
server.close();
tempServer = null;
});
it("read both http(s) and filesystem pdf files", async function () {
const stream1 = new PDFNodeStream({
url: `http://127.0.0.1:${port}/tracemonkey.pdf`,
url: `http://127.0.0.1:${tempServer.port}/tracemonkey.pdf`,
rangeChunkSize: 65536,
disableStream: true,
disableRange: true,
@ -144,7 +113,7 @@ describe("node_stream", function () {
it("read custom ranges for both http(s) and filesystem urls", async function () {
const rangeSize = 32768;
const stream1 = new PDFNodeStream({
url: `http://127.0.0.1:${port}/tracemonkey.pdf`,
url: `http://127.0.0.1:${tempServer.port}/tracemonkey.pdf`,
length: pdfLength,
rangeChunkSize: rangeSize,
disableStream: true,