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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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17
src/display/api.js
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@ -419,7 +419,16 @@ function getDocument(src) {
PDFJSDev.test("GENERIC") &&
isNodeJS
) {
return new PDFNodeStream(params);
const isFetchSupported = function () {
return (
typeof fetch !== "undefined" &&
typeof Response !== "undefined" &&
"body" in Response.prototype
);
};
return isFetchSupported() && isValidFetchUrl(params.url)
? new PDFFetchStream(params)
: new PDFNodeStream(params);
}
return isValidFetchUrl(params.url)
? new PDFFetchStream(params)
@ -762,6 +771,9 @@ class PDFDocumentProxy {
if (typeof PDFJSDev === "undefined" || PDFJSDev.test("TESTING")) {
// For testing purposes.
Object.defineProperty(this, "getNetworkStreamName", {
value: () => this._transport.getNetworkStreamName(),
});
Object.defineProperty(this, "getXFADatasets", {
value: () => this._transport.getXFADatasets(),
});
@ -2344,6 +2356,9 @@ class WorkerTransport {
if (typeof PDFJSDev === "undefined" || PDFJSDev.test("TESTING")) {
// For testing purposes.
Object.defineProperty(this, "getNetworkStreamName", {
value: () => networkStream?.constructor?.name || null,
});
Object.defineProperty(this, "getXFADatasets", {
value: () =>
this.messageHandler.sendWithPromise("GetXFADatasets", null),