Error cannot find module request require stack

I installed request module, and getting the error:

module.js:340
    throw err;
          ^
Error: Cannot find module 'request'

i’ve read all the posts about this error, and understand that this is because module requests is not globally found, but i’ve already tried the 2 suggestions

npm install request -g

should this install it in /usr/loca/bin ? because i don’t see it there.

and

sudo npm link

/usr/local/lib/node_modules/request -> /Users/soulsonic/dev/sandbox/node_test/request

i restarted terminal after each command, but keep getting the cannot find module error.

update

there must have been some sort of conflict in my initial directory, because «npm install request» was not adding «request» under node_modules (there 10 others in there) ..
after switching to a new directory it just worked.

if i run it with -g switch, i do see it bing installed to /usr/local/lib/node_modules/request.

it seems that i just need to update my profile so that above path is automatically added.

I´m still experimenting with node and this modern architecture with javascript, react and so on. But I have a lot of experience with web development (PHP, ASP.NET).
Anyway, I´m working on transcoding of my old frameworks to node and trying out Heroku to host it. At the beginning stages, I had managed to deploy and make my application run completely in the web to test it out. Then, I started to work on many other parts from my application and never tested the deploy again, until now.

I already searched the full day to debug the problems that were occurring and managed to get to a point where the build in Heroku is successful. The problem is that when I run the access the address where was supposed to work, it returns me a generic error:

at=error code=H10 desc=”App crashed” method=GET path=”/system” host=syncsystem-multiplatform-v1.herokuapp.com request_id=9c7e251e-4947-45cb-928e-674148718045 fwd=”186.231.136.56″ dyno= connect= service= status=503 bytes= protocol=http

And in the “view logs” section, this is what is displayed:

    2021-04-14T21:05:29.722072+00:00 heroku[web.1]: State changed from crashed to starting
    2021-04-14T21:05:38.899481+00:00 heroku[web.1]: Starting process with command `node app`
    2021-04-14T21:05:46.776113+00:00 heroku[web.1]: Process exited with status 1
    2021-04-14T21:05:46.851815+00:00 heroku[web.1]: State changed from starting to crashed
    2021-04-14T21:05:46.551799+00:00 app[web.1]: internal/modules/cjs/loader.js:626
    2021-04-14T21:05:46.551865+00:00 app[web.1]:     throw err;
    2021-04-14T21:05:46.551866+00:00 app[web.1]:     ^
    2021-04-14T21:05:46.551866+00:00 app[web.1]: 
    2021-04-14T21:05:46.551866+00:00 app[web.1]: Error: Cannot find module 'request'
    2021-04-14T21:05:46.551867+00:00 app[web.1]: Require stack:
    2021-04-14T21:05:46.551867+00:00 app[web.1]: - /app/app.js
    2021-04-14T21:05:46.551872+00:00 app[web.1]:     at Function.Module._resolveFilename (internal/modules/cjs/loader.js:623:15)
    2021-04-14T21:05:46.551872+00:00 app[web.1]:     at Function.Module._load (internal/modules/cjs/loader.js:527:27)
    2021-04-14T21:05:46.551877+00:00 app[web.1]:     at Module.require (internal/modules/cjs/loader.js:681:19)
    2021-04-14T21:05:46.551878+00:00 app[web.1]:     at require (internal/modules/cjs/helpers.js:16:16)
    2021-04-14T21:05:46.551878+00:00 app[web.1]:     at Object.<anonymous> (/app/app.js:20:17)
    2021-04-14T21:05:46.551878+00:00 app[web.1]:     at Module._compile (internal/modules/cjs/loader.js:774:30)
    2021-04-14T21:05:46.551879+00:00 app[web.1]:     at Object.Module._extensions..js (internal/modules/cjs/loader.js:785:10)
    2021-04-14T21:05:46.551879+00:00 app[web.1]:     at Module.load (internal/modules/cjs/loader.js:641:32)
    2021-04-14T21:05:46.551879+00:00 app[web.1]:     at Function.Module._load (internal/modules/cjs/loader.js:556:12)
    2021-04-14T21:05:46.551879+00:00 app[web.1]:     at Function.Module.runMain (internal/modules/cjs/loader.js:837:10) {
    2021-04-14T21:05:46.551884+00:00 app[web.1]:   code: 'MODULE_NOT_FOUND',
    2021-04-14T21:05:46.551885+00:00 app[web.1]:   requireStack: [ '/app/app.js' ]
    2021-04-14T21:05:46.551885+00:00 app[web.1]: }

During the research I did to debug, I found these main points:
1 – In my Procfile, I´ve got this line:
web: node app

2 – On my package. Json, I understand that this part is essential:

    "scripts": {
        "start": "node app"
    },

3 – On my main app.js, I´ve got the configuration done with Heroku´s server variables:

    app.listen(process.env.PORT || process.env.CONFIG_SYSTEM_PORT, ()=>{
        if(gSystemConfig.configDebug === true)
        {
            console.log(`app running on port: ${ process.env.PORT || process.env.CONFIG_SYSTEM_PORT }`);
        }
    });

4 – I´ve disabled cache on server variables by Heroku´s app settings:
NODEMODULESCACHE=false

5 – I´ve set up a linked github repository to make the deploy automatic:
https://github.com/jorge-mauricio/syncsystem-multiplatformv1-dev/tree/master

If anyone needs to take a look at the full source code, it´s on a github repository:
https://github.com/jorge-mauricio/syncsystem-multiplatformv1-dev/tree/master

There are some react folders in it, but that´s not the main focus now. The main focus is to run the application in node (app.js, backend_node, components_node), which, by the way, is running perfectly on the local environment.

The online address where is supposed to load a login screen, is at:
http://syncsystem-multiplatform-v1.herokuapp.com/system

Anyone has any ideas of what I could be missing out?

Thanks,
Jorge Mauricio

Answer

It looks the problem is exactly what the output error says: it cannot find the module request. In your file package.json, you specify the libraries (modules) you’re using, and request seems to be missing from there.

When you do for example npm install express (or yarn add express, same thing), you add this library to your package.json file. Heroku starts by getting these dependencies from package.json, so that they then can be required.

Also, from the looks of it, the request library has been deprecated. I would suggest switching to axios which seems to fulfill the same needs.

EDIT: I see now that the module is actually listed in package-lock.json, so there shouldn’t be a problem with it. However, you can try running npm install request to add it manually, then deploying to Heroku. That way, you can see if the problem seems to lie with Heroku configs or with the module itself.

Hi Guys, 

I have created based on a tutorial the following nodejs script and imported this as a zip into an nodejs action. 

But if I start the script (FaaS onPrem) am getting the following error Message (Error: Cannot find module ‘/function/main’): 

script name is main.js and the entry point handler which have been configured properly in the ABX action. 

In this tutorial, we are going to learn about how to resolve can’t find a module error in Node.js.

If you are not installed a module properly using npm install command and trying to use it in your project by using require() function you will see this following error inside the terminal.

internal/modules/cjs/loader.js:796
    throw err;
    ^

Error: Cannot find module '/Users/saigowtham/Desktop/sss/run'
    at Function.Module._resolveFilename (internal/modules/cjs/loader.js:793:17)
    at Function.Module._load (internal/modules/cjs/loader.js:686:27)
    at Function.Module.runMain (internal/modules/cjs/loader.js:1043:10)
    at internal/main/run_main_module.js:17:11 {
  code: 'MODULE_NOT_FOUND',
  requireStack: []
}

To fix Cannot find module errors, install the modules properly by running a npm install command in the appropriate directory as your project’s app.js or index.js file.

Here is an example:

# npm install your-module-name

npm install express

or delete the node_modules folder and package-lock.json file and re-install it again using the npm install command.

rm -rf node_modules package-lock.json

Can’t find modules in local files

If you are trying to import one local file inside another and passed a wrong path to the require() function you will see this error again.

To fix this error, pass a correct module path to the require() function.