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Remove UTF-8 BOM before parsing JSON (#35175)

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Signed-off-by: Shane Handley <shanehandley@fastmail.com>
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shanehandley 2025-01-27 23:18:03 +11:00 • committed by GitHub
parent 5a0a60efc1
commit cd93841ba1
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3 changed files with 26 additions and 27 deletions
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17
components/script/dom/xmlhttprequest.rs
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@ -4,11 +4,11 @@
use std::borrow::ToOwned;
use std::cell::Cell;
use std::cmp;
use std::default::Default;
use std::str::{self, FromStr};
use std::sync::{Arc, Mutex};
use std::time::{Duration, Instant};
use std::{cmp, slice};
use dom_struct::dom_struct;
use encoding_rs::{Encoding, UTF_8};
@ -38,7 +38,7 @@ use servo_atoms::Atom;
use servo_url::ServoUrl;
use url::Position;
use crate::body::{BodySource, Extractable, ExtractedBody};
use crate::body::{decode_to_utf16_with_bom_removal, BodySource, Extractable, ExtractedBody};
use crate::document_loader::DocumentLoader;
use crate::dom::bindings::buffer_source::HeapBufferSource;
use crate::dom::bindings::cell::DomRefCell;
@ -1432,19 +1432,6 @@ impl XMLHttpRequest {
return rval.set(NullValue());
}
// Step 4
fn decode_to_utf16_with_bom_removal(bytes: &[u8], encoding: &'static Encoding) -> Vec<u16> {
let mut decoder = encoding.new_decoder_with_bom_removal();
let capacity = decoder
.max_utf16_buffer_length(bytes.len())
.expect("Overflow");
let mut utf16 = Vec::with_capacity(capacity);
let extra = unsafe { slice::from_raw_parts_mut(utf16.as_mut_ptr(), capacity) };
let last = true;
let (_, read, written, _) = decoder.decode_to_utf16(bytes, extra, last);
assert_eq!(read, bytes.len());
unsafe { utf16.set_len(written) }
utf16
}
// https://xhr.spec.whatwg.org/#json-response refers to
// https://infra.spec.whatwg.org/#parse-json-from-bytes which refers to
// https://encoding.spec.whatwg.org/#utf-8-decode which means