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Use AbortController unconditionally with the Fetch API

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Given the browsers that we currently support in the PDF.js project and the MDN compatibility data, see links below, it should no longer be necessary to check for the availability of `AbortController` before using it.
 - https://github.com/mozilla/pdf.js/wiki/Frequently-Asked-Questions#faq-support
 - https://developer.mozilla.org/en-US/docs/Web/API/AbortController#browser_compatibility
This commit is contained in:
Jonas Jenwald 2022-08-24 12:10:07 +02:00
parent 14e8167df9
commit b0a73a9388
1 changed files with 5 additions and 14 deletions
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19
src/display/fetch_stream.js
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@ -35,7 +35,7 @@ function createFetchOptions(headers, withCredentials, abortController) {
return {
method: "GET",
headers,
signal: abortController?.signal,
signal: abortController.signal,
mode: "cors",
credentials: withCredentials ? "include" : "same-origin",
redirect: "follow",
@ -114,9 +114,7 @@ class PDFFetchStreamReader {
this._disableRange = true;
}
if (typeof AbortController !== "undefined") {
this._abortController = new AbortController();
}
this._abortController = new AbortController();
this._isStreamingSupported = !source.disableStream;
this._isRangeSupported = !source.disableRange;
@ -207,9 +205,7 @@ class PDFFetchStreamReader {
if (this._reader) {
this._reader.cancel(reason);
}
if (this._abortController) {
this._abortController.abort();
}
this._abortController.abort();
}
}
@ -224,10 +220,7 @@ class PDFFetchStreamRangeReader {
this._readCapability = createPromiseCapability();
this._isStreamingSupported = !source.disableStream;
if (typeof AbortController !== "undefined") {
this._abortController = new AbortController();
}
this._abortController = new AbortController();
this._headers = createHeaders(this._stream.httpHeaders);
this._headers.append("Range", `bytes=${begin}-${end - 1}`);
@ -274,9 +267,7 @@ class PDFFetchStreamRangeReader {
if (this._reader) {
this._reader.cancel(reason);
}
if (this._abortController) {
this._abortController.abort();
}
this._abortController.abort();
}
}