Swagger UI的requestInterceptor能否返回Promise？客户端是否等待其解析？

Great question! Let's break this down clearly for you:

• Can you return a Promise from requestInterceptor?
  Yes, absolutely. Swagger's official client libraries (like swagger-js) fully support returning a Promise from the requestInterceptor function. This is perfect for handling asynchronous tasks that need to finish before your request goes out—think fetching a fresh auth token, validating session state, or tweaking request headers based on async data.

• Will the Swagger client wait for the Promise to resolve before making the actual HTTP request?
  Definitely. The client will pause the entire request pipeline until your Promise is resolved. Once the Promise resolves (usually with the modified request object), the client will proceed to send the actual HTTP request using the updated details. If the Promise is rejected, the request will typically be aborted, letting you handle errors like expired sessions or failed token refreshes gracefully.

Here's a quick practical example to show how this works:

const swaggerClient = new SwaggerClient({
  url: '/api/swagger.json',
  requestInterceptor: (request) => {
    // Simulate an async operation to get a valid auth token
    return new Promise((resolve, reject) => {
      fetch('/api/refresh-token')
        .then(res => res.json())
        .then(data => {
          request.headers.Authorization = `Bearer ${data.newToken}`;
          resolve(request); // Request proceeds once this resolves
        })
        .catch(err => {
          reject('Failed to refresh token, aborting request'); // Request is aborted on reject
        });
    });
  }
});

A quick side note: If you don't need async logic, you can still return the request object directly (no Promise required)—the client handles both synchronous and asynchronous return types seamlessly.

内容的提问来源于stack exchange，提问作者Pradeep