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data: URL processing and generalized forgiving-base64 decode tests
Tests for whatwg/fetch#579.
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‎fetch/data-urls/README.md‎

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== data: URLs ==
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`resources/data-urls.json` contains `data:` URL tests. The tests are encoded as a JSON array. Each value in the array is an array of two or three values. The first value describes the input, the second value describes the expected MIME type, null if the input is expected to fail somehow, or the empty string if the expected value is `text/plain;charset=US-ASCII`. The third value, if present, describes the expected body as an array of integers representing bytes.
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These tests are used for `data:` URLs in this directory (see `processing.any.js`).
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== Forgiving-base64 decode ==
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`resources/base64.json` contains [forgiving-base64 decode](https://infra.spec.whatwg.org/#forgiving-base64-decode) tests. The tests are encoded as a JSON array. Each value in the array is an array of two values. The first value describes the input, the second value describes the output as an array of integers representing bytes or null if the input cannot be decoded.
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These tests are used for `data:` URLs in this directory (see `base64.any.js`) and `window.atob()` in `../../html/webappapis/atob/base64.html`.

‎fetch/data-urls/base64.any.js‎

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promise_test(() => fetch("resources/base64.json").then(res => res.json()).then(runBase64Tests), "Setup.");
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function runBase64Tests(tests) {
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for(let i = 0; i < tests.length; i++) {
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const input = tests[i][0],
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output = tests[i][1],
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dataURL = "data:;base64," + input;
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promise_test(t => {
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if(output === null) {
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return promise_rejects(t, new TypeError(), fetch(dataURL));
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}
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return fetch(dataURL).then(res => res.arrayBuffer()).then(body => {
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assert_array_equals(new Uint8Array(body), output);
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});
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}, "data: URL base64 handling: " + format_value(input));
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}
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}

‎fetch/data-urls/processing.any.js‎

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promise_test(() => fetch("resources/data-urls.json").then(res => res.json()).then(runDataURLTests), "Setup.");
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function runDataURLTests(tests) {
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for(let i = 0; i < tests.length; i++) {
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const input = tests[i][0],
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expectedMimeType = tests[i][1],
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expectedBody = expectedMimeType !== null ? tests[i][2] : null;
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promise_test(t => {
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if(expectedMimeType === null) {
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return promise_rejects(t, new TypeError(), fetch(input));
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} else {
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return fetch(input).then(res => {
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return res.arrayBuffer().then(body => {
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assert_array_equals(new Uint8Array(body), expectedBody);
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assert_equals(res.headers.get("content-type"), expectedMimeType); // We could assert this earlier, but this fails often
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});
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});
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}
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}, format_value(input));
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}
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}

‎fetch/data-urls/resources/base64.json‎

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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\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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]

‎fetch/data-urls/resources/data-urls.json‎

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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: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/xml,X X",
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"application/xml",
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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",
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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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]

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