W
Wasp•2d ago
act

Accessing request.body from api

Hey there, I would like to access the request.body from an api endpoint. I would like to know what should I wtite in the back end and as well in the main.wasp file in order to retrieve data from the request.body server side.
3 Replies
kapa.ai
kapa.ai•2d ago
Hi @act. I'm kapa.ai, your friendly support bot. I will try to answer your question by searching through the knowledge base. :wave: ---------------------- To access the request.body from an API endpoint in Wasp, you need to set up a custom API endpoint and implement the corresponding server-side function. Here's how you can do it: 1. In your main.wasp file, declare a custom API endpoint: 
api myCustomEndpoint {
  fn: import { myCustomEndpoint } from "@src/apis",
  httpRoute: (POST, "/my-custom-endpoint")
}
api myCustomEndpoint {
  fn: import { myCustomEndpoint } from "@src/apis",
  httpRoute: (POST, "/my-custom-endpoint")
}
2. In your server-side code (e.g., src/apis.js or src/apis.ts), implement the API function: 
export const myCustomEndpoint = (req, res, context) => {
  const requestBody = req.body;
  console.log('Request body:', requestBody);
  
  // Process the request body as needed
  // ...

  res.json({ message: 'Received request body', data: requestBody });
};
export const myCustomEndpoint = (req, res, context) => {
  const requestBody = req.body;
  console.log('Request body:', requestBody);
  
  // Process the request body as needed
  // ...

  res.json({ message: 'Received request body', data: requestBody });
};
In this implementation, you can access the request body directly via req.body. Wasp uses Express.js under the hood, which automatically parses JSON and URL-encoded bodies by default. Wasp Documentation on Custom HTTP API Endpoints provides more details on setting up and using custom API endpoints in Wasp. Remember that the req object is an Express.js request object, so you have access to all its properties and methods, including req.body for accessing the request payload. ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ---------------------- Sorry @act, I seem to be having a bit of trouble. Don't worry though, I've pinged my support and they will try to fix me up! :technologist: Perhaps try again in 15mins?
act
actOP•2d ago
@kapa.ai I am doing something like this in the front end: const response = await fetch(${API_BASE_URL}/api/assistants/threads/${threadId}/messages, { method: 'POST', body: JSON.stringify({ content: text, }), }); But I am not getting anything in req.body. Is this corect ?
kapa.ai
kapa.ai•2d ago
Let me check the knowledge base for you again. One moment! :books: ---------------------- Based on the information you've provided and the knowledge sources available, there are a few points to consider regarding your issue with req.body being empty: 1. API Usage: Instead of using fetch directly, Wasp recommends using the api object imported from wasp/client/api. This wrapper ensures proper handling of CORS and authentication. Wasp Documentation on Using the API from the Client suggests using it like this: 
import { api } from "wasp/client/api";

// ...

const res = await api.post("/assistants/threads/${threadId}/messages", {
  content: text
});
import { api } from "wasp/client/api";

// ...

const res = await api.post("/assistants/threads/${threadId}/messages", {
  content: text
});
2. CORS Configuration: If you're using a custom API endpoint, you might need to ensure CORS is properly configured. Wasp provides a way to do this using apiNamespace. Wasp Documentation on Making Sure CORS Works explains how to set up CORS for custom API endpoints. 3. Server-side Implementation: Make sure your server-side API implementation is correctly set up to handle POST requests and parse the JSON body. Wasp uses Express.js middleware by default which should handle JSON parsing, but it's worth double-checking your implementation. 4. Content-Type Header: When using fetch, ensure you're setting the correct Content-Type header. Your current code doesn't show this, but it should be: 
headers: {
  'Content-Type': 'application/json'
},
headers: {
  'Content-Type': 'application/json'
},
5. Debugging: To debug this issue, you could add some logging on the server-side to see what's coming through: 
export const myApiFunction = (req, res, context) => {
  console.log('Headers:', req.headers);
  console.log('Body:', req.body);
  // ... rest of your function
};
export const myApiFunction = (req, res, context) => {
  console.log('Headers:', req.headers);
  console.log('Body:', req.body);
  // ... rest of your function
};
If you're still not seeing anything in req.body after trying these suggestions, there might be an issue with how the API is set up in your Wasp file or how the server is processing the request. In that case, you might need to review your entire API setup or consider opening an issue on the Wasp GitHub repository for more specific help. ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ---------------------- Sorry @act, I seem to be having a bit of trouble. Don't worry though, I've pinged my support and they will try to fix me up! :technologist: Perhaps try again in 15mins?

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