Wasp•4w ago

Cannot find helmet

I am trying to had some custom headers, specifically crossOriginOpenerPolicy and crossOriginEmbedderPolicy, according to the docs I should be able to override helmet with a custom middleware. But when I try to import helmet, it can find it. (no problem with cors though) serverSetup.ts: import helmet from 'helmet'; export const serverMiddlewareFn = (middlewareConfig) => { // Configure Helmet to set Cross-Origin-Opener-Policy and Cross-Origin-Embedder-Policy middlewareConfig.set('helmet', helmet({ crossOriginOpenerPolicy: { policy: "same-origin" }, crossOriginEmbedderPolicy: { policy: "require-corp" } })); return middlewareConfig; }; wasp.main: ... server: { middlewareConfigFn: import { serverMiddlewareFn } from "@src/serverSetup" },...

6 Replies

kapa.ai•4w ago

Hi @Gwain. I'm kapa.ai, your friendly support bot. I will try to answer your question by searching through the knowledge base. :wave: ---------------------- It looks like you're trying to customize Helmet middleware in your Wasp application, which is the right approach for adding custom security headers. The issue you're facing with not being able to import Helmet is likely because you need to install it as a dependency in your project. While Wasp uses Helmet internally (as mentioned in the middleware documentation), you need to explicitly install it to import it in your own code. Try installing Helmet in your project:

npm install helmet

npm install helmet

Or if you're using yarn:

yarn add helmet

yarn add helmet

After installing, you should be able to import it properly. Also, make sure to add the correct type annotation for your middleware function:

import helmet from 'helmet';
import { type MiddlewareConfigFn } from 'wasp/server';

export const serverMiddlewareFn: MiddlewareConfigFn = (middlewareConfig) => {
  // Configure Helmet to set Cross-Origin-Opener-Policy and Cross-Origin-Embedder-Policy
  middlewareConfig.set('helmet', helmet({
    crossOriginOpenerPolicy: { policy: "same-origin" },
    crossOriginEmbedderPolicy: { policy: "require-corp" }
  }));

  return middlewareConfig;
};

import helmet from 'helmet';
import { type MiddlewareConfigFn } from 'wasp/server';

export const serverMiddlewareFn: MiddlewareConfigFn = (middlewareConfig) => {
  // Configure Helmet to set Cross-Origin-Opener-Policy and Cross-Origin-Embedder-Policy
  middlewareConfig.set('helmet', helmet({
    crossOriginOpenerPolicy: { policy: "same-origin" },
    crossOriginEmbedderPolicy: { policy: "require-corp" }
  }));

  return middlewareConfig;
};

Your approach to customizing the middleware in the Wasp file looks correct according to the middleware configuration documentation. This will override the default Helmet configuration with your custom settings. ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ---------------------- Sorry @Gwain, 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?

GwainOP•4w ago

@kapa.ai How do I set rossOriginOpenerPolicy and crossOriginEmbedderPolicy? The server middleware doesnt seem to be changing the response headers.

kapa.ai•4w ago

Let me check the knowledge base for you again. One moment! :books: ---------------------- I see you're having trouble with setting the crossOriginOpenerPolicy and crossOriginEmbedderPolicy headers in your Wasp application. Let me help you troubleshoot this issue. Based on the knowledge sources, you're using the correct approach by customizing the global middleware. However, there might be a few reasons why your headers aren't being applied: 1. Make sure you're properly overriding the default Helmet configuration. According to the documentation, Wasp uses Helmet by default with certain configurations. Here's how you can properly override the Helmet middleware:

import helmet from 'helmet';
import { config, type MiddlewareConfigFn } from 'wasp/server';

export const serverMiddlewareFn: MiddlewareConfigFn = (middlewareConfig) => {
  // Override the default helmet configuration
  middlewareConfig.set('helmet', helmet({
    crossOriginOpenerPolicy: { policy: "same-origin" },
    crossOriginEmbedderPolicy: { policy: "require-corp" }
  }));
  
  return middlewareConfig;
};

import helmet from 'helmet';
import { config, type MiddlewareConfigFn } from 'wasp/server';

export const serverMiddlewareFn: MiddlewareConfigFn = (middlewareConfig) => {
  // Override the default helmet configuration
  middlewareConfig.set('helmet', helmet({
    crossOriginOpenerPolicy: { policy: "same-origin" },
    crossOriginEmbedderPolicy: { policy: "require-corp" }
  }));
  
  return middlewareConfig;
};

2. Verify that your middleware function is being correctly imported and applied in your Wasp file. 3. Check if there are any other middleware or configurations that might be overriding your settings. If you're still experiencing issues, you might want to try using an apiNamespace approach as mentioned in the middleware configuration documentation, as this has been noted to help with CORS-related issues. There's also a known issue with CORS and API configuration in Wasp that the team is working on improving, as mentioned in several GitHub issues (Issue #1303 and Issue #1757). If you continue to have problems, you might need to check your browser's developer tools to see what headers are actually being sent in the response, which can help diagnose the issue further. I hope this helps! Let me know if you need more assistance with this. ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ---------------------- Sorry @Gwain, 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?

GwainOP•4w ago

Cannot for the life of me set either of those to work. @kapa.ai How do I add headers to the response?!

kapa.ai•4w ago

Let me check the knowledge base for you again. One moment! :books: ---------------------- I understand your frustration with adding headers to responses in Wasp. Let me explain the different ways you can add custom headers: 1. For specific API endpoints You can add headers directly in your API implementation:

export const fooBar = (req, res, context) => {  
  // Add custom headers to this specific API response
  res.set("Cross-Origin-Opener-Policy", "same-origin");
  res.set("Cross-Origin-Embedder-Policy", "require-corp");
  
  res.json({ msg: "Hello!" });  
};

export const fooBar = (req, res, context) => {  
  // Add custom headers to this specific API response
  res.set("Cross-Origin-Opener-Policy", "same-origin");
  res.set("Cross-Origin-Embedder-Policy", "require-corp");
  
  res.json({ msg: "Hello!" });  
};

This approach is shown in the Custom HTTP API Endpoints documentation. 2. For global middleware configuration To apply headers globally to all routes, use the server middleware configuration:

import { config, type MiddlewareConfigFn } from 'wasp/server'

export const serverMiddlewareFn: MiddlewareConfigFn = (middlewareConfig) => {
  // Get the existing middleware (like helmet) and modify it
  const existingMiddleware = middlewareConfig.get('helmet');
  
  // Create a new middleware function that adds your headers
  const newMiddleware = (req, res, next) => {
    // Call the existing middleware first
    existingMiddleware(req, res, () => {
      // Then add your custom headers
      res.setHeader('Cross-Origin-Opener-Policy', 'same-origin');
      res.setHeader('Cross-Origin-Embedder-Policy', 'require-corp');
      next();
    });
  };
  
  // Replace the existing middleware with your enhanced version
  middlewareConfig.set('helmet', newMiddleware);
  
  return middlewareConfig;
}

import { config, type MiddlewareConfigFn } from 'wasp/server'

export const serverMiddlewareFn: MiddlewareConfigFn = (middlewareConfig) => {
  // Get the existing middleware (like helmet) and modify it
  const existingMiddleware = middlewareConfig.get('helmet');
  
  // Create a new middleware function that adds your headers
  const newMiddleware = (req, res, next) => {
    // Call the existing middleware first
    existingMiddleware(req, res, () => {
      // Then add your custom headers
      res.setHeader('Cross-Origin-Opener-Policy', 'same-origin');
      res.setHeader('Cross-Origin-Embedder-Policy', 'require-corp');
      next();
    });
  };
  
  // Replace the existing middleware with your enhanced version
  middlewareConfig.set('helmet', newMiddleware);
  
  return middlewareConfig;
}

3. For a specific path or group of APIs You can use apiNamespace to apply middleware to a specific path:

// In your main.wasp file
apiNamespace secureApi {
  middlewareConfigFn: import { secureApiMiddleware } from "@src/middleware",
  path: "/secure"
}

// In your middleware.ts file
export const secureApiMiddleware: MiddlewareConfigFn = (middlewareConfig) => {
  // Add a custom middleware function that sets your headers
  middlewareConfig.use((req, res, next) => {
    res.setHeader('Cross-Origin-Opener-Policy', 'same-origin');
    res.setHeader('Cross-Origin-Embedder-Policy', 'require-corp');
    next();
  });
  
  return middlewareConfig;
}

// In your main.wasp file
apiNamespace secureApi {
  middlewareConfigFn: import { secureApiMiddleware } from "@src/middleware",
  path: "/secure"
}

// In your middleware.ts file
export const secureApiMiddleware: MiddlewareConfigFn = (middlewareConfig) => {
  // Add a custom middleware function that sets your headers
  middlewareConfig.use((req, res, next) => {
    res.setHeader('Cross-Origin-Opener-Policy', 'same-origin');
    res.setHeader('Cross-Origin-Embedder-Policy', 'require-corp');
    next();
  });
  
  return middlewareConfig;
}

This approach is particularly useful for CORS-related headers as mentioned in the middleware configuration documentation. If you're still having issues, it might be worth checking if there are other middleware components overriding your headers or if there are specific requirements for the headers you're trying to set. ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ---------------------- Sorry @Gwain, 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?

Carlos•4w ago

Did you do npm i helmet?

Gaming

Programming

Cannot find helmet

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