49 lines
1.3 KiB
JavaScript
49 lines
1.3 KiB
JavaScript
// A 1x1 PNG image.
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// Source: https://commons.wikimedia.org/wiki/File:1x1.png (Public Domain)
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const IMAGE = atob(
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"iVBORw0KGgoAAAANSUhEUgAAAAEAAAABAQMAAAAl21bKAAAAA1BMVEUAA" +
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"ACnej3aAAAAAXRSTlMAQObYZgAAAApJREFUCNdjYAAAAAIAAeIhvDMAAAAASUVORK5CYII="
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);
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const IFRAME =
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"<!DOCTYPE html>\n" +
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"<script>\n" +
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"onmessage = event => {\n" +
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"parent.postMessage(document.referrer, '*');\n" +
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"};\n" +
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"</script>";
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function handleRequest(aRequest, aResponse) {
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aResponse.setStatusLine(aRequest.httpVersion, 200);
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let key;
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if (aRequest.queryString.includes("what=script")) {
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key = "script";
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} else if (aRequest.queryString.includes("what=image")) {
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key = "image";
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} else {
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key = "iframe";
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}
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if (aRequest.queryString.includes("result")) {
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aResponse.write(getState(key));
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setState(key, "");
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return;
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}
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if (aRequest.hasHeader("Referer")) {
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let referrer = aRequest.getHeader("Referer");
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setState(key, referrer);
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}
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if (key == "script") {
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aResponse.setHeader("Content-Type", "text/javascript", false);
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aResponse.write("42;");
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} else if (key == "image") {
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aResponse.setHeader("Content-Type", "image/png", false);
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aResponse.write(IMAGE);
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} else {
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aResponse.setHeader("Content-Type", "text/html", false);
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aResponse.write(IFRAME);
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}
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}
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