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buffer,lib: update atob to align wpt's base64.json
Refs: https://html.spec.whatwg.org/multipage/webappapis.html#dom-atob-dev Refs: https://infra.spec.whatwg.org/#forgiving-base64-decode PR-URL: #43901 Reviewed-By: James M Snell <jasnell@gmail.com>
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7 files changed

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lines changed

7 files changed

+330
-5
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‎lib/buffer.js

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Original file line numberDiff line numberDiff line change
@@ -1256,6 +1256,8 @@ const kForgivingBase64AllowedChars = [
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0x2F, // /
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0x3D, // =
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];
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const kEqualSignIndex = ArrayPrototypeIndexOf(kForgivingBase64AllowedChars,
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0x3D);
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function atob(input) {
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// The implementation here has not been performance optimized in any way and
@@ -1267,6 +1269,7 @@ function atob(input) {
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input = `${input}`;
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let nonAsciiWhitespaceCharCount = 0;
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let equalCharCount = 0;
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12711274
for (let n = 0; n < input.length; n++) {
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const index = ArrayPrototypeIndexOf(
@@ -1277,13 +1280,36 @@ function atob(input) {
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// The first 5 elements of `kForgivingBase64AllowedChars` are
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// ASCII whitespace char codes.
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nonAsciiWhitespaceCharCount++;
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if (index === kEqualSignIndex) {
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equalCharCount++;
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} else if (equalCharCount) {
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// The `=` char is only allowed at the end.
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throw lazyDOMException('Invalid character', 'InvalidCharacterError');
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}
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if (equalCharCount > 2) {
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// Only one more `=` is permitted after the first equal sign.
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throw lazyDOMException('Invalid character', 'InvalidCharacterError');
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}
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} else if (index === -1) {
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throw lazyDOMException('Invalid character', 'InvalidCharacterError');
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}
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}
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let reminder = nonAsciiWhitespaceCharCount % 4;
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// See #2, #3, #4 - https://infra.spec.whatwg.org/#forgiving-base64
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if (!reminder) {
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// Remove all trailing `=` characters and get the new reminder.
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reminder = (nonAsciiWhitespaceCharCount - equalCharCount) % 4;
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} else if (equalCharCount) {
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// `=` should not in the input if there's a reminder.
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throw lazyDOMException('Invalid character', 'InvalidCharacterError');
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}
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// See #3 - https://infra.spec.whatwg.org/#forgiving-base64
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if (nonAsciiWhitespaceCharCount % 4 === 1) {
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if (reminder === 1) {
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throw lazyDOMException(
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'The string to be decoded is not correctly encoded.',
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'InvalidCharacterError');
@@ -1298,6 +1324,7 @@ module.exports = {
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Buffer,
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SlowBuffer,
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transcode,
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// Legacy
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kMaxLength,
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kStringMaxLength,

‎test/fixtures/wpt/LICENSE.md

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Original file line numberDiff line numberDiff line change
@@ -1,6 +1,6 @@
11
# The 3-Clause BSD License
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3-
Copyright © web-platform-tests contributors
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Copyright 2019 web-platform-tests contributors
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Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
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‎test/fixtures/wpt/README.md

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@@ -15,6 +15,7 @@ Last update:
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- dom/abort: https://github.com/web-platform-tests/wpt/tree/c49cafb491/dom/abort
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- dom/events: https://github.com/web-platform-tests/wpt/tree/f8821adb28/dom/events
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- encoding: https://github.com/web-platform-tests/wpt/tree/c1b24fce6e/encoding
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- fetch/data-urls/resources: https://github.com/web-platform-tests/wpt/tree/7c79d998ff/fetch/data-urls/resources
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- FileAPI: https://github.com/web-platform-tests/wpt/tree/3b279420d4/FileAPI
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- hr-time: https://github.com/web-platform-tests/wpt/tree/34cafd797e/hr-time
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- html/webappapis/atob: https://github.com/web-platform-tests/wpt/tree/f267e1dca6/html/webappapis/atob

‎test/fixtures/wpt/fetch/data-urls/resources/base64.json

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@@ -0,0 +1,82 @@
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[
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["", []],
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["abcd", [105, 183, 29]],
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[" abcd", [105, 183, 29]],
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["abcd ", [105, 183, 29]],
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[" abcd===", null],
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["abcd=== ", null],
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["abcd ===", null],
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["a", null],
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["ab", [105]],
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["abc", [105, 183]],
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["abcde", null],
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["𐀀", null],
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["=", null],
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["==", null],
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["===", null],
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["====", null],
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["=====", null],
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["a=", null],
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["a==", null],
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["a===", null],
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["a====", null],
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["a=====", null],
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["ab=", null],
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["ab==", [105]],
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["ab===", null],
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["ab====", null],
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["ab=====", null],
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["abc=", [105, 183]],
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["abc==", null],
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["abc===", null],
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["abc====", null],
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["abc=====", null],
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["abcd=", null],
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["abcd==", null],
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["abcd===", null],
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["abcd====", null],
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["abcd=====", null],
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["abcde=", null],
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["abcde==", null],
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["abcde===", null],
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["abcde====", null],
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["abcde=====", null],
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["=a", null],
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["=a=", null],
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["a=b", null],
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["a=b=", null],
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["ab=c", null],
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["ab=c=", null],
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["abc=d", null],
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["abc=d=", null],
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["ab\u000Bcd", null],
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["ab\u3000cd", null],
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["ab\u3001cd", null],
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["ab\tcd", [105, 183, 29]],
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["ab\ncd", [105, 183, 29]],
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["ab\fcd", [105, 183, 29]],
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["ab\rcd", [105, 183, 29]],
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["ab cd", [105, 183, 29]],
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["ab\u00a0cd", null],
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["ab\t\n\f\r cd", [105, 183, 29]],
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[" \t\n\f\r ab\t\n\f\r cd\t\n\f\r ", [105, 183, 29]],
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["ab\t\n\f\r =\t\n\f\r =\t\n\f\r ", [105]],
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["A", null],
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["/A", [252]],
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["//A", [255, 240]],
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["///A", [255, 255, 192]],
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["////A", null],
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["/", null],
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["A/", [3]],
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["AA/", [0, 15]],
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["AAAA/", null],
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["AAA/", [0, 0, 63]],
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["\u0000nonsense", null],
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["abcd\u0000nonsense", null],
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["YQ", [97]],
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["YR", [97]],
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["~~", null],
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["..", null],
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["--", null],
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["__", null]
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]

‎test/fixtures/wpt/fetch/data-urls/resources/data-urls.json

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@@ -0,0 +1,214 @@
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[
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["data://test/,X",
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"text/plain;charset=US-ASCII",
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[88]],
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["data://test:test/,X",
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null],
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["data:,X",
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"text/plain;charset=US-ASCII",
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[88]],
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["data:",
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null],
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["data:text/html",
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null],
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["data:text/html ;charset=x ",
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null],
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["data:,",
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"text/plain;charset=US-ASCII",
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[]],
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["data:,X#X",
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"text/plain;charset=US-ASCII",
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[88]],
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["data:,%FF",
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"text/plain;charset=US-ASCII",
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[255]],
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["data:text/plain,X",
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"text/plain",
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[88]],
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["data:text/plain ,X",
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"text/plain",
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[88]],
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["data:text/plain%20,X",
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"text/plain%20",
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[88]],
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["data:text/plain\f,X",
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"text/plain%0c",
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[88]],
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["data:text/plain%0C,X",
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"text/plain%0c",
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[88]],
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["data:text/plain;,X",
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"text/plain",
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[88]],
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["data:;x=x;charset=x,X",
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"text/plain;x=x;charset=x",
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[88]],
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["data:;x=x,X",
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"text/plain;x=x",
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[88]],
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["data:text/plain;charset=windows-1252,%C2%B1",
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"text/plain;charset=windows-1252",
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[194, 177]],
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["data:text/plain;Charset=UTF-8,%C2%B1",
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"text/plain;charset=UTF-8",
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[194, 177]],
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["data:text/plain;charset=windows-1252,áñçə💩",
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"text/plain;charset=windows-1252",
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[195, 161, 195, 177, 195, 167, 201, 153, 240, 159, 146, 169]],
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["data:text/plain;charset=UTF-8,áñçə💩",
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"text/plain;charset=UTF-8",
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[195, 161, 195, 177, 195, 167, 201, 153, 240, 159, 146, 169]],
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["data:image/gif,%C2%B1",
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"image/gif",
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[194, 177]],
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["data:IMAGE/gif,%C2%B1",
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"image/gif",
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[194, 177]],
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["data:IMAGE/gif;hi=x,%C2%B1",
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"image/gif;hi=x",
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[194, 177]],
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["data:IMAGE/gif;CHARSET=x,%C2%B1",
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"image/gif;charset=x",
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[194, 177]],
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["data: ,%FF",
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"text/plain;charset=US-ASCII",
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[255]],
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["data:%20,%FF",
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"text/plain;charset=US-ASCII",
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[255]],
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["data:\f,%FF",
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"text/plain;charset=US-ASCII",
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[255]],
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["data:%1F,%FF",
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"text/plain;charset=US-ASCII",
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[255]],
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["data:\u0000,%FF",
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"text/plain;charset=US-ASCII",
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[255]],
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["data:%00,%FF",
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"text/plain;charset=US-ASCII",
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[255]],
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["data:text/html ,X",
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"text/html",
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[88]],
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["data:text / html,X",
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"text/plain;charset=US-ASCII",
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[88]],
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["data:†,X",
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"text/plain;charset=US-ASCII",
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[88]],
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["data:†/†,X",
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"%e2%80%a0/%e2%80%a0",
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[88]],
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["data:X,X",
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"text/plain;charset=US-ASCII",
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[88]],
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["data:image/png,X X",
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"image/png",
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[88, 32, 88]],
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["data:application/javascript,X X",
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"application/javascript",
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[88, 32, 88]],
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["data:application/xml,X X",
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"application/xml",
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[88, 32, 88]],
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["data:text/javascript,X X",
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"text/javascript",
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[88, 32, 88]],
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["data:text/plain,X X",
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"text/plain",
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[88, 32, 88]],
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["data:unknown/unknown,X X",
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"unknown/unknown",
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[88, 32, 88]],
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["data:text/plain;a=\",\",X",
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"text/plain;a=\"\"",
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[34, 44, 88]],
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["data:text/plain;a=%2C,X",
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"text/plain;a=%2C",
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[88]],
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["data:;base64;base64,WA",
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"text/plain",
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[88]],
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["data:x/x;base64;base64,WA",
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"x/x",
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[88]],
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["data:x/x;base64;charset=x,WA",
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"x/x;charset=x",
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[87, 65]],
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["data:x/x;base64;charset=x;base64,WA",
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"x/x;charset=x",
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[88]],
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["data:x/x;base64;base64x,WA",
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"x/x",
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[87, 65]],
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["data:;base64,W%20A",
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"text/plain;charset=US-ASCII",
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[88]],
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["data:;base64,W%0CA",
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"text/plain;charset=US-ASCII",
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[88]],
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["data:x;base64x,WA",
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"text/plain;charset=US-ASCII",
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[87, 65]],
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["data:x;base64;x,WA",
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"text/plain;charset=US-ASCII",
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[87, 65]],
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["data:x;base64=x,WA",
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"text/plain;charset=US-ASCII",
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[87, 65]],
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["data:; base64,WA",
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"text/plain;charset=US-ASCII",
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[88]],
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["data:; base64,WA",
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"text/plain;charset=US-ASCII",
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[88]],
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["data: ;charset=x ; base64,WA",
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"text/plain;charset=x",
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[88]],
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["data:;base64;,WA",
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"text/plain",
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[87, 65]],
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["data:;base64 ,WA",
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"text/plain;charset=US-ASCII",
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[88]],
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["data:;base64 ,WA",
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"text/plain;charset=US-ASCII",
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[88]],
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["data:;base 64,WA",
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"text/plain",
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[87, 65]],
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["data:;BASe64,WA",
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"text/plain;charset=US-ASCII",
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[88]],
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["data:;%62ase64,WA",
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"text/plain",
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[87, 65]],
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["data:%3Bbase64,WA",
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"text/plain;charset=US-ASCII",
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[87, 65]],
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["data:;charset=x,X",
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"text/plain;charset=x",
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[88]],
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["data:; charset=x,X",
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"text/plain;charset=x",
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[88]],
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["data:;charset =x,X",
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"text/plain",
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[88]],
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["data:;charset= x,X",
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"text/plain;charset=\" x\"",
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[88]],
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["data:;charset=,X",
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"text/plain",
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[88]],
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["data:;charset,X",
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"text/plain",
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[88]],
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["data:;charset=\"x\",X",
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"text/plain;charset=x",
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[88]],
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["data:;CHARSET=\"X\",X",
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"text/plain;charset=X",
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[88]]
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]

‎test/fixtures/wpt/versions.json

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@@ -19,6 +19,10 @@
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"commit": "c1b24fce6e625c1b79124a58f27bf9adce02d5d7",
2020
"path": "encoding"
2121
},
22+
"fetch/data-urls/resources": {
23+
"commit": "7c79d998ff42e52de90290cb847d1b515b3b58f7",
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"path": "fetch/data-urls/resources"
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},
2226
"FileAPI": {
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"commit": "3b279420d40afea32506e823f9ac005448f4f3d8",
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"path": "FileAPI"

‎test/wpt/status/html/webappapis/atob.json

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@@ -1,5 +1,2 @@
11
{
2-
"base64.any.js": {
3-
"skip": "no such file or directory fetch/data-urls/resources/base64.json"
4-
}
52
}

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