pdf.js.mirror/test/unit/autolinker_spec.js
calixteman b1f51818ae
Bound the email parts in the autolinker regex
The local part and the domain labels were unbounded, making the
search quadratic in the length of a run of characters preceding
an "@": scanning the text of a single page could take seconds.
2026-08-03 16:38:02 +02:00

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/* Copyright 2025 Mozilla Foundation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
import { Autolinker } from "../../web/autolinker.js";
function testLinks(links) {
const matches = Autolinker.findLinks(links.map(link => link[0]).join("\n"));
expect(matches.length).toEqual(links.length);
for (let i = 0; i < links.length; i++) {
expect(matches[i].url).toEqual(links[i][1]);
}
}
describe("autolinker", function () {
it("should correctly find URLs", function () {
const [matched] = Autolinker.findLinks("http://www.example.com");
expect(matched.url).toEqual("http://www.example.com/");
});
it("should correctly find simple valid URLs", function () {
testLinks([
[
"http://subdomain.example.com/path/to/page?query=param",
"http://subdomain.example.com/path/to/page?query=param",
],
[
"www.example.com/path/to/resource",
"http://www.example.com/path/to/resource",
],
[
"http://example.com/path?query=value#fragment",
"http://example.com/path?query=value#fragment",
],
]);
});
it("should correctly find emails", function () {
testLinks([
["mailto:username@example.com", "mailto:username@example.com"],
[
"mailto:someone@subdomain.example.com",
"mailto:someone@subdomain.example.com",
],
["peter@abc.de", "mailto:peter@abc.de"],
["red.teddy.b@abc.com", "mailto:red.teddy.b@abc.com"],
[
"abc_@gmail.com", // '_' is ok before '@'.
"mailto:abc_@gmail.com",
],
[
"dummy-hi@gmail.com", // '-' is ok in user name.
"mailto:dummy-hi@gmail.com",
],
[
"a..df@gmail.com", // Stop at consecutive '.'.
"mailto:a..df@gmail.com",
],
[
".john@yahoo.com", // Remove heading '.'.
"mailto:john@yahoo.com",
],
[
"abc@xyz.org?/", // Trim ending invalid chars.
"mailto:abc@xyz.org",
],
[
"fan{abc@xyz.org", // Trim beginning invalid chars.
"mailto:abc@xyz.org",
],
[
"fan@g.com..", // Trim the ending periods.
"mailto:fan@g.com",
],
[
"CAP.cap@Gmail.Com", // Keep the original case.
"mailto:CAP.cap@Gmail.Com",
],
["partl@mail.boku.ac.at", "mailto:partl@mail.boku.ac.at"],
["Irene.Hyna@bmwf.ac.at", "mailto:Irene.Hyna@bmwf.ac.at"],
["<hi@foo.bar.baz>", "mailto:hi@foo.bar.baz"],
[
"foo@用户@例子.广告",
"mailto:%E7%94%A8%E6%88%B7@%E4%BE%8B%E5%AD%90.%E5%B9%BF%E5%91%8A",
],
]);
});
it("should correctly handle complex or edge cases", function () {
testLinks([
[
"https://example.com/path/to/page?query=param&another=val#section",
"https://example.com/path/to/page?query=param&another=val#section",
],
[
"www.example.com/resource/(parentheses)-allowed/",
"http://www.example.com/resource/(parentheses)-allowed/",
],
[
"http://example.com/path_with_underscores",
"http://example.com/path_with_underscores",
],
[
"http://www.example.com:8080/port/test",
"http://www.example.com:8080/port/test",
],
[
"https://example.com/encoded%20spaces%20in%20path",
"https://example.com/encoded%20spaces%20in%20path",
],
["mailto:hello+world@example.com", "mailto:hello+world@example.com"],
["www.a.com/#a=@?q=rr&r=y", "http://www.a.com/#a=@?q=rr&r=y"],
["http://a.com/1/2/3/4\\5\\6", "http://a.com/1/2/3/4/5/6"],
["http://www.example.com/foo;bar", "http://www.example.com/foo;bar"],
// ["www.abc.com/#%%^&&*(", "http://www.abc.com/#%%^&&*("], TODO: Patch the regex to accept the whole URL.
]);
});
it("shouldn't find false positives", function () {
const matches = Autolinker.findLinks(
[
"not a valid URL",
"htp://misspelled-protocol.com",
"example.com (missing protocol)",
"https://[::1] (IPv6 loopback)",
"http:// (just protocol)",
"", // Blank.
"http", // No colon.
"www.", // Missing domain.
"https-and-www", // Dash not colon.
"http:/abc.com", // Missing slash.
"http://((()),", // Only invalid chars in host name.
"ftp://example.com", // Ftp scheme is not supported.
"http:example.com", // Missing slashes.
"http//[example.com", // Invalid IPv6 address.
"http//[00:00:00:00:00:00", // Invalid IPv6 address.
"http//[]", // Empty IPv6 address.
"abc.example.com", // URL without scheme.
"JD?M$0QP)lKn06l1apKDC@\\qJ4B!!(5m+j.7F790m", // Not a valid email.
"262@0.302304", // Invalid domain.
"foo@123.456", // Invalid domain.
].join("\n")
);
expect(matches.length).toEqual(0);
});
it("should correctly find links among mixed content", function () {
const matches = Autolinker.findLinks(
[
"Here's a URL: https://example.com and an email: mailto:test@example.com",
"www.example.com and more text",
"Check this: http://example.com/path?query=1 and this mailto:info@domain.com",
].join("\n")
);
expect(matches.length).toEqual(5);
expect(matches[0].url).toEqual("https://example.com/");
expect(matches[1].url).toEqual("mailto:test@example.com");
expect(matches[2].url).toEqual("http://www.example.com/");
expect(matches[3].url).toEqual("http://example.com/path?query=1");
expect(matches[4].url).toEqual("mailto:info@domain.com");
});
it("should correctly work with special characters", function () {
testLinks([
[
"https://example.com/path/to/page?query=value&symbol=£",
"https://example.com/path/to/page?query=value&symbol=%C2%A3",
],
[
"mailto:user.name+alias@example-domain.com",
"mailto:user.name+alias@example-domain.com",
],
["http://example.com/@user", "http://example.com/@user"],
["https://example.com/path#@anchor", "https://example.com/path#@anchor"],
["www.测试.net", "http://www.xn--0zwm56d.net/"],
["www.测试.net", "http://www.xn--0zwm56d.net/"],
// [ "www.测试。net。", "http://www.xn--0zwm56d.net/" ] TODO: Patch `createValidAbsoluteUrl` to accept this.
]);
});
it("should correctly find links with dashes and newlines between numbers", function () {
const matches = Autolinker.findLinks("http://abcd.efg/test1-\n2/test.html");
expect(matches.length).toEqual(1);
expect(matches[0].url).toEqual("http://abcd.efg/test1-2/test.html");
});
it("should correctly identify emails with special prefixes", function () {
testLinks([
["wwwtest@email.com", "mailto:wwwtest@email.com"],
["httptest@email.com", "mailto:httptest@email.com"],
]);
});
it("shouldn't remove the dash when it's an the end of a line (bug 1974112)", function () {
testLinks([
[
"https://github.com/pypi/linehaul-cloud-\nfunction",
"https://github.com/pypi/linehaul-cloud-function",
],
]);
});
it("should correctly find emails with hyphens in domain (bug 20557)", function () {
testLinks([
[
"john.doe@faculity.uni-cityname.tld",
"mailto:john.doe@faculity.uni-cityname.tld",
],
["john.doe@uni-cityname.tld", "mailto:john.doe@uni-cityname.tld"],
]);
});
it("should find emails with the longest parts allowed by the RFCs", function () {
const local = "a".repeat(64);
const label = "b".repeat(63);
testLinks([[`${local}@${label}.com`, `mailto:${local}@${label}.com`]]);
});
it("shouldn't find emails with parts longer than allowed by the RFCs", function () {
expect(
Autolinker.findLinks(`${"a".repeat(107)}@${"a".repeat(80)}.com`)
).toEqual([]);
});
it("should handle a long run of characters before an @ efficiently", function () {
const text = `${"a".repeat(50000)}@`;
const startTime = performance.now();
expect(Autolinker.findLinks(text)).toEqual([]);
expect(performance.now() - startTime).toBeLessThan(1000);
});
});