代码如下：

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addEventListener('fetch', event => {
    const request = event.request;
    const url = new URL(request.url);
    const response = fetch('http://173.82.110.36:5230' + url.pathname + url.search, {
        method: request.method,
        headers: request.headers,
        body: request.body,
    });
    event.respondWith(response);
});