azure: setHeaders throws exception

[tobiasdiez]

Environment

• Operating System: Linux
• Node Version: v16.16.0
• Nuxt Version: 3.0.0-rc.5
• Package Manager: yarn@1.22.19
• Builder: vite
• User Config: alias, nitro, ssr, meta, css, tailwindcss, modules, watch, runtimeConfig, serverHandlers, storybook, hooks
• Runtime Modules: @nuxtjs/tailwindcss@5.1.3, @pinia/nuxt@0.3.0, ./modules/storybook, -runtime-compiler-module
• Build Modules: -

Reproduction

I still have to find a way to reproduce this in a minimal enviroment.
For now you can run yarn dev:azure in https://github.com/JabRef/JabRefOnline.

Describe the bug

I get the following error when the app is deployed to azure (using nuxt):

[api] [2022-07-16T18:13:53.417Z] System.Private.CoreLib: Exception while executing function: Functions.functions. System.Private.CoreLib: Result: Failure
[api] [2022-07-16T18:13:53.417Z] Exception: Cannot set properties of undefined (setting 'content-type')
[api] [2022-07-16T18:13:53.417Z] Stack: TypeError: Cannot set properties of undefined (setting 'content-type')
[api] [2022-07-16T18:13:53.417Z]     at ServerResponse.setHeader (node:_http_outgoing:585:45)
[api] [2022-07-16T18:13:53.417Z]     at Object.errorhandler [as onError] (file:///workspace/JabRefOnline/.output/server/functions/chunks/nitro/azure.mjs:339:13)
[api] [2022-07-16T18:13:53.417Z]     at processTicksAndRejections (node:internal/process/task_queues:96:5)
[api] [2022-07-16T18:13:53.417Z]     at async nodeHandler (file:///workspace/JabRefOnline/.output/server/functions/node_modules/h3/dist/index.mjs:373:9)
[api] [2022-07-16T18:13:53.417Z]     at async Module.handle (file:///workspace/JabRefOnline/.output/server/functions/chunks/nitro/azure.mjs:1652:49).

The errorhandler is pointing to

nitro/src/runtime/error.ts

Line 40 in 5ab1041

event.res.setHeader('Content-Type', 'text/html')

, but I've yet to figure out why this is triggered in the first place (I think it actually triggered by another call to setHeader in a middleware).

Additional context

The line ServerResponse.setHeader (node:_http_outgoing:585:45) is pointing to https://github.com/nodejs/node/blob/main/lib/_http_outgoing.js#L612. And indeed, this particular server response object contains only the kCapture symbol, but no other symbols (i.e. no kOutHeaders as normally).

Moreover, it might be related to unjs/h3#21.

Logs

No response

[tobiasdiez]

A similar issue happens for IncomingMessage as well:

TypeError: Cannot read property 'pipes' of undefined     at IncomingMessage.Readable.unpipe (internal/streams/readable.js:821:13)     at unpipe (/home/site/wwwroot/functions/node_modules/unpipe/index.js:47:12)     at halt (/home/site/wwwroot/functions/node_modules/raw-body/index.js:129:3)     at invokeCallback (/home/site/wwwroot/functions/node_modules/raw-body/index.js:228:9)     at processTicksAndRejections (internal/process/task_queues.js:77:11)

with points to https://github.com/nodejs/node/blob/ba67fe66eb7777d5055c785be153374843fc647e/lib/internal/streams/readable.js#L856, i.e. _readableState does not exist.

[tobiasdiez]

And similarly

TypeError: res._implicitHeader is not a function at writetop (/home/site/wwwroot/functions/node_modules/express-session/index.js:276:15) at ServerResponse.end (/home/site/wwwroot/functions/node_modules/express-session/index.js:343:16) at Immediate. (file:///home/site/wwwroot/functions/node_modules/h3/dist/index.mjs:138:17) at processImmediate (internal/timers.js:464:21)

[harish2704]

I too got stuck in this issue .
For me, it happened when I tried to mount an Express application in Nuxt3 application ( server/api , which internally uses nitro , h3, ofetch and unenv to serve server / API requests.

This issue happens because, ExpressJs and ofetch uses different implementations of ServerResponse class .

If my understanding is correct, this issue can be reproduced by mounting and running and ExpressJs application using h3.fromNodeMiddleware() function and calling that handler using ofetch from server

[tobiasdiez]

As a workaround, you can overwrite the implementation of the offending methods with the node implementations. See eg the lines following https://github.com/JabRef/JabRefOnline/blob/036a7c3697713e9b998c708fa1f5e9ba4f0a0637/server/api/index.ts#L11

[gemyago]

I'm facing a similar issue and It is very likely related to server side rendering when fetch is performed on on server. It is working correctly when fetched client side. Very likely related to below issue as well: nuxt/nuxt#12720

[pi0]

Hi. I'm not sure if it is something we should include to the core considering the cause backs to express incompatibility and patching native node http: is probably not best idea.