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// Derrived from https://github.com/junosuarez/url-relative | ||
// | ||
// Copyright (c) MMXV jden jason@denizac.org | ||
// | ||
// ISC License | ||
// | ||
// Permission to use, copy, modify, and/or distribute this software for any | ||
// purpose with or without fee is hereby granted, provided that the above | ||
// copyright notice and this permission notice appear in all copies. | ||
// | ||
// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES | ||
// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF | ||
// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY | ||
// SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES | ||
// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION | ||
// OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN | ||
// CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | ||
|
||
export const relative = (referrer, location) => { | ||
referrer = String(referrer || ""); | ||
location = String(location || ""); | ||
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if (referrer === location) { | ||
return ""; | ||
} | ||
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const referrerURL = new URL(referrer); | ||
const locationURL = new URL(location); | ||
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if (referrerURL.host !== locationURL.host) { | ||
return location; | ||
} | ||
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if (referrerURL.protocol !== locationURL.protocol) { | ||
return location; | ||
} | ||
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if (referrerURL.auth !== locationURL.auth) { | ||
return location; | ||
} | ||
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// left location right, look for closest common path segment | ||
const referrerParts = referrerURL.pathname.substr(1).split("/"); | ||
const locationParts = locationURL.pathname.substr(1).split("/"); | ||
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if (referrerURL.pathname === locationURL.pathname) { | ||
if (locationURL.pathname[locationURL.pathname.length - 1] === "/") { | ||
return "."; | ||
} | ||
return locationParts[locationParts.length - 1]; | ||
} | ||
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while (referrerParts[0] === locationParts[0]) { | ||
referrerParts.shift(); | ||
locationParts.shift(); | ||
} | ||
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let length = referrerParts.length - locationParts.length; | ||
if (length > 0) { | ||
if (referrer.endsWith("/")) { | ||
locationParts.unshift(".."); | ||
} | ||
while (length > 0) { | ||
length -= 1; | ||
locationParts.unshift(".."); | ||
} | ||
return locationParts.join("/"); | ||
} | ||
if (length < 0) { | ||
return locationParts.join("/"); | ||
} | ||
length = locationParts.length - 1; | ||
while (length > 0) { | ||
length -= 1; | ||
locationParts.unshift(".."); | ||
} | ||
return locationParts.join("/"); | ||
}; |
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// Derrived from https://github.com/junosuarez/url-relative | ||
// | ||
// Copyright (c) MMXV jden jason@denizac.org | ||
// | ||
// ISC License | ||
// | ||
// Permission to use, copy, modify, and/or distribute this software for any | ||
// purpose with or without fee is hereby granted, provided that the above | ||
// copyright notice and this permission notice appear in all copies. | ||
// | ||
// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES | ||
// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF | ||
// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY | ||
// SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES | ||
// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION | ||
// OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN | ||
// CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | ||
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import tape from "tape"; | ||
import { relative } from "../src/url.js"; | ||
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const { test } = tape; | ||
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test("different protocol", t => { | ||
t.plan(2); | ||
t.equal( | ||
relative("http://a.com:12/a", "https://a.com:12/a"), | ||
"https://a.com:12/a" | ||
); | ||
t.equal( | ||
relative("http://a.com:12/a/", "https://a.com:12/a/"), | ||
"https://a.com:12/a/" | ||
); | ||
}); | ||
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test("file protocol", t => { | ||
t.plan(1); | ||
t.equal(relative("file:///a", "file:///b"), "b"); | ||
}); | ||
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test("different domain", t => { | ||
t.plan(2); | ||
t.equal(relative("http://a.com:12/a", "http://b.com/a"), "http://b.com/a"); | ||
t.equal(relative("http://a.com:12/a/", "http://b.com/a/"), "http://b.com/a/"); | ||
}); | ||
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test("same domain", t => { | ||
t.plan(2); | ||
t.equal(relative("http://a.com/a", "http://a.com/b"), "b"); | ||
t.equal(relative("http://a.com/a/", "http://a.com/b/"), "../b/"); | ||
}); | ||
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test("divergent paths, longer from", t => { | ||
t.plan(4); | ||
t.equal( | ||
relative("http://example.com/a/b/c/d", "http://example.com/a/b/d"), | ||
"../d" | ||
); | ||
t.equal( | ||
relative("http://example.com/a/b/c/d/e", "http://example.com/a/d/e"), | ||
"../../d/e" | ||
); | ||
t.equal( | ||
relative("http://example.com/a/b/c/d/", "http://example.com/a/b/d/"), | ||
"../../d/" | ||
); | ||
t.equal( | ||
relative("http://example.com/a/b/c/d/e/", "http://example.com/a/d/e/"), | ||
"../../../d/e/" | ||
); | ||
}); | ||
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test("divergent paths, longer to", t => { | ||
t.plan(6); | ||
t.equal( | ||
relative("http://example.com/a/b/c/d", "http://example.com/a/b/c/d/e"), | ||
"e" | ||
); | ||
t.equal( | ||
relative("http://example.com/a/b/c/d", "http://example.com/a/b/c/d/e/f"), | ||
"e/f" | ||
); | ||
t.equal(relative("http://example.com/", "http://example.com/a/b"), "a/b"); | ||
t.equal( | ||
relative("http://example.com/a/b/c/d/", "http://example.com/a/b/c/d/e/"), | ||
"e/" | ||
); | ||
t.equal( | ||
relative("http://example.com/a/b/c/d/", "http://example.com/a/b/c/d/e/f/"), | ||
"e/f/" | ||
); | ||
t.equal(relative("http://example.com/", "http://example.com/a/b/"), "a/b/"); | ||
}); | ||
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test("divergent paths, equal length", t => { | ||
t.plan(2); | ||
t.equal( | ||
relative( | ||
"http://example.com/a/b/c/d/e/f", | ||
"http://example.com/a/b/c/g/h/j" | ||
), | ||
"../../g/h/j" | ||
); | ||
t.equal( | ||
relative( | ||
"http://example.com/a/b/c/d/e/f/", | ||
"http://example.com/a/b/c/g/h/j/" | ||
), | ||
"../../../g/h/j/" | ||
); | ||
}); | ||
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test("identical", t => { | ||
t.plan(2); | ||
t.equal(relative("https://a.com/a", "https://a.com/a"), ""); | ||
t.equal(relative("https://a.com/a/", "https://a.com/a/"), ""); | ||
}); |