var xhr = new XMLHttpRequest();
xhr.open('GET', 'https://api.example.com/data', true);

// 添加自定义标头
xhr.setRequestHeader('X-Custom-Header', 'CustomValue');
xhr.setRequestHeader('Another-Header', 'AnotherValue');

xhr.onreadystatechange = function() {
    if (xhr.readyState === 4 && xhr.status === 200) {
        console.log(xhr.responseText);
    }
};

xhr.send();

fetch('https://api.example.com/data', {
    method: 'GET',
    headers: {
        'X-Custom-Header': 'CustomValue',
        'Another-Header': 'AnotherValue',
        'Content-Type': 'application/json'
    }
})
.then(response => response.json())
.then(data => console.log(data))
.catch(error => console.error('Error:', error));

$.ajax({
    url: 'https://api.example.com/data',
    type: 'GET', // 或 'POST'
    beforeSend: function(xhr) {
        xhr.setRequestHeader('X-Custom-Header', 'CustomValue');
    },
    success: function(data) {
        console.log(data);
    },
    error: function(error) {
        console.error('Error:', error);
    }
});

$.ajax({
    url: 'https://api.example.com/data',
    type: 'GET',
    headers: {
        'X-Custom-Header': 'CustomValue',
        'Another-Header': 'AnotherValue'
    },
    success: function(data) {
        console.log(data);
    }
});