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Convert ChunkedStreamManager.prototype.sendRequest to an asynchronous method

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This is not only shorter, but (in my opinion) it also simplifies the code.

*Note:* In order to keep the *five* different `BasePDFStreamRangeReader` implementations consistent, we purposely don't re-factor the `PDFWorkerStreamRangeReader` class to support `for await...of` iteration.
This commit is contained in:
Jonas Jenwald 2026-02-14 15:19:58 +01:00
parent b6d028419b
commit 59fbad617b
1 changed files with 25 additions and 34 deletions
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59
src/core/chunked_stream.js
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@ -293,46 +293,37 @@ class ChunkedStreamManager {
this.msgHandler = args.msgHandler;
}
sendRequest(begin, end) {
async sendRequest(begin, end) {
const rangeReader = this.pdfStream.getRangeReader(begin, end);
let chunks = [];
return new Promise((resolve, reject) => {
const readChunk = ({ value, done }) => {
try {
if (done) {
resolve(
chunks.length > 0 || !this.disableAutoFetch
? arrayBuffersToBytes(chunks)
: null
);
chunks = null;
return;
}
if (typeof PDFJSDev === "undefined" || PDFJSDev.test("TESTING")) {
assert(
value instanceof ArrayBuffer,
"readChunk (sendRequest) - expected an ArrayBuffer."
);
}
chunks.push(value);
rangeReader.read().then(readChunk, reject);
} catch (e) {
reject(e);
}
};
rangeReader.read().then(readChunk, reject);
}).then(data => {
while (true) {
const { value, done } = await rangeReader.read();
if (this.aborted) {
chunks = null;
return; // Ignoring any data after abort.
}
if (!data) {
// The range request wasn't dispatched, see the "GetRangeReader" handler
// in the `src/display/api.js` file.
return;
if (done) {
break;
}
this.onReceiveData({ chunk: data.buffer, begin });
});
if (typeof PDFJSDev === "undefined" || PDFJSDev.test("TESTING")) {
assert(
value instanceof ArrayBuffer,
"sendRequest - expected an ArrayBuffer."
);
}
chunks.push(value);
}
if (chunks.length === 0 && this.disableAutoFetch) {
// The range request wasn't dispatched, see the "GetRangeReader" handler
// in the `src/display/api.js` file.
return;
}
const data = arrayBuffersToBytes(chunks);
chunks = null;
this.onReceiveData({ chunk: data.buffer, begin });
}
/**