使用Promise.all通过多页GraphQL循环访问API

async function fetchPages(apiEndpoint, query) {
  let hasNextPage = true;
  let after = null;
  let results = [];

  while (hasNextPage) {
    const variables = { after };
    const response = await fetch(apiEndpoint, {
      method: 'POST',
      headers: {
        'Content-Type': 'application/json',
      },
      body: JSON.stringify({ query, variables }),
    });
    const data = await response.json();

    results = results.concat(data.items);
    hasNextPage = data.hasNextPage;
    after = data.endCursor;
  }

  return results;
}

const apiEndpoint = 'https://api.example.com/graphql';
const query = `
  query {
    items(first: 10, after: $after) {
      edges {
        node {
          // 根据API的具体定义填写需要的字段
        }
        cursor
      }
      pageInfo {
        hasNextPage
        endCursor
      }
    }
  }
`;

// 调用fetchPages函数并使用Promise.all进行处理
Promise.all([
  fetchPages(apiEndpoint, query),
  fetchPages(apiEndpoint, query),
  // 可以根据需要添加更多的请求
]).then(([results1, results2]) => {
  // 处理返回的结果
  console.log('Results from first API call:', results1);
  console.log('Results from second API call:', results2);
}).catch((error) => {
  // 处理错误
  console.error('Error:', error);
});