Response headers doesn't work about azure-func-http

[kniwase]

Hello everyone,

I've found a simple workaround.
Please try this.

Thank you.

import { Context, HttpRequest } from '@azure/functions';
import { AzureHttpAdapter } from '@nestjs/azure-func-http';
import { createApp } from '../src/main.azure';

function createPsuedoApp(createApp: () => Promise<any>): () => Promise<any> {
  return async (): Promise<any> => {
    const app = await createApp();
    const psuedoApp = {
      getHttpAdapter: () => {
        return {
          getInstance: () => {
            return (req: any, res: any) => {
              const done = req.context.done;
              req.context.done = (err?: string | Error, result?: any) => {
                res.writeHead();
                done(err, result);
              };
              app.getHttpAdapter().getInstance()(req, res);
            };
          },
        };
      },
    };
    return psuedoApp;
  };
}

export default function(context: Context, req: HttpRequest): void {
  AzureHttpAdapter.handle(createPsuedoApp(createApp), context, req);
}

[brunoog33]

Hello everyone,

I have the same problem, will it be resolved?

[gristoi]

Ive just hit this exact same issue. Has there been any movement on this.? Only way i can currently work arouns it is remove my app.enableCors() ( as this conflicts with the adapter ) and override the HttpAdapters context

[OskarsPakers]

Would be nice to have a pull request to fix it within azure-func-http.

[kamilmysliwiec]

Please provide a minimum reproduction repository.

[joain946]

Repository: https://github.com/joain946/nestjs-azure

[joain946]

Any update on this @kamilmysliwiec? Do you need any additional input from me?

[nlaurie]

I am having the exact same issue, none of the nestjs headers are being sent to the azure function only stock azure response headers. Ran the code from git and npm and having same issue.

Seems like the writeHead bound function is never getting called, breakpoint not getting hit in bound function.
this.writeHead = this.writeHead.bind(this, context);

Info: azure functions v3

[nlaurie]

Interesting Note

When using AzureHttpRouter
const app = await NestFactory.create(AppModule, new AzureHttpRouter());

The some headers seem to be sent , most notably 'content-type'

[sportelli]

Hello everyone

@nlaurie @gristoi Did you find a workaround ?
@kamilmysliwiec How can we help debugging it?

We are stuck with the exact same issue.

Thank you

Felix

[KaduMoura]

We solved thia on host.json file..

{ "version": "2.0", "extensionBundle": { "id": "Microsoft.Azure.Functions.ExtensionBundle", "version": "[2.*, 3.0.0)" }, "functionTimeout": "01:00:00", "extensions": { "http": { "routePrefix": "api", "customHeaders": { "Content-Type": "application/json" } } } }

All we needed is json response header..

We are using microsoft docker's img to emulate in local environment.

[tiagoboeing]

Hello everyone,

I've found a simple workaround. Please try this.

Thank you.

import { Context, HttpRequest } from '@azure/functions';
import { AzureHttpAdapter } from '@nestjs/azure-func-http';
import { createApp } from '../src/main.azure';

function createPsuedoApp(createApp: () => Promise<any>): () => Promise<any> {
  return async (): Promise<any> => {
    const app = await createApp();
    const psuedoApp = {
      getHttpAdapter: () => {
        return {
          getInstance: () => {
            return (req: any, res: any) => {
              const done = req.context.done;
              req.context.done = (err?: string | Error, result?: any) => {
                res.writeHead();
                done(err, result);
              };
              app.getHttpAdapter().getInstance()(req, res);
            };
          },
        };
      },
    };
    return psuedoApp;
  };
}

export default function(context: Context, req: HttpRequest): void {
  AzureHttpAdapter.handle(createPsuedoApp(createApp), context, req);
}

Only quoting to appoint the file where you need to edit. Add this script on main/index.ts.

[qstyler]

Somehow this script solves the header problem, but misses the 302 status, making it 200.
Any way to keep the status and have the Location header?