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const custom_cors_response = (payload, base_url) => {
base_url = base_url || new URL(location.href);
// Clone the given `payload` so that, as we modify it, we won't be mutating
// the caller's value in unexpected ways.
payload = Object.assign({}, payload);
payload.headers = payload.headers || {};
// Note that, in order to have out-of-the-box support for tests that don't
// call `setup({'allow_uncaught_exception': true})` we return a no-op JS
// payload. This approach will avoid hitting syntax errors if the resource is
// interpreted as script. Without this workaround, the SyntaxError would be
// caught by the test harness and trigger a test failure.
payload.content = payload.content || '/* custom-cors-response.js content */';
payload.status_code = payload.status_code || 200;
// Assume that we'll be doing a CORS-enabled fetch so we'll need to set ACAO.
const acao = "Access-Control-Allow-Origin";
if (!(acao in payload.headers)) {
payload.headers[acao] = '*';
}
if (!("Content-Type" in payload.headers)) {
payload.headers["Content-Type"] = "text/javascript";
}
let ret = new URL("/common/CustomCorsResponse.py", base_url);
for (const key in payload) {
ret.searchParams.append(key, JSON.stringify(payload[key]));
}
return ret;
};
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