GA4 项目中使用测量协议时，标准数据报告会无法显示数据。但是，可以通过使用自定义报告及 BigQuery 等方法来获取数据。以下是通过测量协议将数据写入 BigQuery 的示例代码：

// Google Cloud project ID.
const projectId = 'your-project-id';

// Dataset ID for temporary storage.
const datasetId = 'ga4_data';

// Table ID to store data ingested through the Measurement Protocol.
const tableId = 'mp_data';

// BigQuery configuration.
const bigquery = new BigQuery({
    projectId: projectId,
    location: 'US'
});

// Handler function to ingest the data received through the Measurement Protocol.
exports.receiveMPData = async (req, res) => {
    // Creates a new table in case it doesn't exist already.
    await createTable(bigquery, datasetId, tableId);
    
    // Parses the Measurement Protocol payload.
    const mp_payload = new URLSearchParams(req.rawBody);
    
    // Extracts the hits array from the payload.
    const hit_string = mp_payload.get('hits');
    const hits = JSON.parse(hit_string);
    
    // Appends the hits to the BigQuery table.
    const insertRowsResponse = await bigquery
        .dataset(datasetId)
        .table(tableId)
        .insert(hits);
        
    console.log(`Inserted ${insertRowsResponse[0].length} rows`);
    
    res.status(200).send('Success');
};

// Function to create a BigQuery table in case it doesn't exist already.
async function createTable(bigquery, datasetId, tableId) {
    const dataset = bigquery.dataset(datasetId);
    
    // Creates the dataset if it doesn't exist already.
    if (!(await dataset.exists())) {
        await dataset.create();
    }
    
    const options = {
        schema: 'schema.json',
        location: 'US'
    };
    
    // Creates the table if it doesn't exist already.
    const [table] = await dataset.table(tableId).get({ autoCreate: options });
    
    console.log(`Table ${table.id} created.`);
}

此代码将 GA4