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cleanup(web, fetch): dedupe minesniff / "extract a MIME type" algorithm (#14044)

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Closes #14002
This commit is contained in:
Andreu Botella 2022-03-20 14:31:12 +01:00 • committed by GitHub
parent 0bc286ab47
commit 593801e265
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4 changed files with 55 additions and 71 deletions
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37
ext/fetch/23_request.js
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@ -18,7 +18,7 @@
const { guardFromHeaders } = window.__bootstrap.headers;
const { mixinBody, extractBody } = window.__bootstrap.fetchBody;
const { getLocationHref } = window.__bootstrap.location;
const mimesniff = window.__bootstrap.mimesniff;
const { extractMimeType } = window.__bootstrap.mimesniff;
const { blobFromObjectUrl } = window.__bootstrap.file;
const {
headersFromHeaderList,
@ -32,9 +32,6 @@
ArrayPrototypeMap,
ArrayPrototypeSlice,
ArrayPrototypeSplice,
MapPrototypeHas,
MapPrototypeGet,
MapPrototypeSet,
ObjectKeys,
ObjectPrototypeIsPrototypeOf,
RegExpPrototypeTest,
@ -174,41 +171,11 @@
/** @type {AbortSignal} */
[_signal];
get [_mimeType]() {
let charset = null;
let essence = null;
let mimeType = null;
const values = getDecodeSplitHeader(
headerListFromHeaders(this[_headers]),
"Content-Type",
);
if (values === null) return null;
for (const value of values) {
const temporaryMimeType = mimesniff.parseMimeType(value);
if (
temporaryMimeType === null ||
mimesniff.essence(temporaryMimeType) == "*/*"
) {
continue;
}
mimeType = temporaryMimeType;
if (mimesniff.essence(mimeType) !== essence) {
charset = null;
const newCharset = MapPrototypeGet(mimeType.parameters, "charset");
if (newCharset !== undefined) {
charset = newCharset;
}
essence = mimesniff.essence(mimeType);
} else {
if (
MapPrototypeHas(mimeType.parameters, "charset") === null &&
charset !== null
) {
MapPrototypeSet(mimeType.parameters, "charset", charset);
}
}
}
if (mimeType === null) return null;
return mimeType;
return extractMimeType(values);
}
get [_body]() {
return this[_request].body;