Goal
I want to watch folder using node red. If any file created then I want to upload that file to server using node red http request node.
I have used node-red-contrib-wfwatch module for folder watch and http request module for api call.
Issue
I am able to get change event on file created but how can i pass select file to http request body as form data. I have no idea how to do it.
I am new in Node Red so can anyone please help for achieve this.
Here what I want to achieve
Structure of Node red display here
The node-red-contrib-wfwatch node doesn't get the file, just sends a message with following payload:
{
changeType: "update",
filePath: "/tmp/foo"
}
You need to use File node for this purpose. But before that, because the File node expects the filename be in msg.filename not in msg.payload.filePath you need to add Change node:
and connect the whole thing like this:
Just replace the Debug node with your HTTP Request one.
Related
I am using forge-api getObject() to download the excel from BIM360 hub. I set up express sever in the backend and make the call in the frontend.
I could get the result of the object and it looks like this:
So my question is:
How can I convert the result as a download link correctly? I could download the excel, but the excel can not be opened...
My code looks like this:
backend:
frontend:
I think all you need to modify in your backend code is to return content.body, instead of content
See e.g. https://github.com/Autodesk-Forge/forge-derivatives-explorer/blob/master/routes/data.management.js#L296
It might even be better if you generated a pre-signed URL for the file and passed that to the client. In that case, the file would not be downloaded to your server first and then to the client, but directly to the client in a single step.
https://forge.autodesk.com/en/docs/data/v2/reference/http/buckets-:bucketKey-objects-:objectName-signed-POST/
I have loopback 4 - nodejs in the backend and Ionic 4 in the frontend of my mobile application. I'm storing an mp3 file on server sid and I want to stream and play it on the client-side so basically audio streaming from loopback4.
So basically I'm looking for server-side code in loopback-4 which is in typescript to audio-stream a file to client. (I'm unable to use npmjs libraries since most of them are not typed and cannot be used in typescript)
As soon as I know about loopback4, it doesn't have nodejs stream implementation. I recommend you to use native NodeJS streams. Check out this repo https://github.com/noamtcohen/AudioStreamer
Short answer:
I was able to achieve this by simply serving static files i.e my audio file from the server-side. Accessing it using the endpoint I made and calling it using the tag on the frontend.
Long answer:
In loopback 4, you can find a line of code in application.ts file where public directory from the root folder of the server project is served.
this.static('/', path.join(__dirname, '../../public'));
Similarly, you can serve your static files from whatever dir you want. In my case, I served my files from media folder which I added in the root directory of my node project.
this.static('/', path.join(__dirname, '../media'));
The second step is to expose an API endpoint which you would use to make a get request to the server. You can do that inside index.ts file of the server project and the code right below app.start().
app.static('/media', 'media', { extensions: ['mp3'] });
Here, adding the API endpoint and the directory in the root folder of the node project is mandatory.
Now, on the frontend you only have to add your complete url to access the static file from node project to the src attribute of html tag.
Add controls attribute to the tag and html will handle everything for you. You can play, pause, skip, etc.
<audio controls #audioElement id="id1" [src]="http://localhost:3000/media/audio-files/myAudiofile.mp3">
I'm uploading files from Angular 2 with ngx-uploader and storing them on backend (nodejs/feathers) with multer. Now I'm having trouble to reach and display them, for now im just trying to display image, but actually i just need to see how paths work so i can reach the .pdf files.
As a file path im getting this: resources\\uploads\\quality-docs\\FILENAME so i tried to reach them like this: http://localhost:3030/resources/uploads/quality-docs/FILENAME but it doesnt work, it gives me 404. Just realised when i put files in static, public folder, i can reach it like http://localhost:3030/FILENAME ... but is there a way for it to not be in public?
This is how my backend structure looks like:
Any ideas/sugestions are welcome, is this even a right way to go? Plus if any of you have idea how to delete files from server?
Assuming that you are using express in your node app, you need to include a static route to the resources/uploads directory (express static routes) like the following:
app.use(express.static('resources/uploads'))
For deleting files from a node application use unlink fs.unlink
So being novice in Express and Node, I fear I must be not understanding something fundamental about middleware. I am trying to upload a file using express-formidable, and I've got it to work (as far as taking the file and uploading it to the directory of my choice). However, I would love a progress bar or to be able to do something at the start of the upload such as choose the file name. I see a lot of examples of regular formidable using the 'progress' or 'file' event. But for the life of me I can't figure out how to access this with express-formidable. Since I can't create an IncomingForm, I don't know where the events are or how to bind them.
What am I missing about how express-formidable works? Does it cut out everything about formidable and just stuff a file where you tell it? Or do you have access to everything formidable?
Here's an example of a route I have called ingest, which is where I receive an uploaded file and process it.
app.post('/ingest', function(req, res) {
/*I want to be able to show progress here, and do other things
like set the file name before it's saved, but by the time I get here
the file is already processed and saved, and I can't figure out how
to access events using '.on' if there's no form object*/
});
Is it possible to check if image exists using absolute path? I have 2 apps using one domain, but with different ports. I want to check if the file exists on other app. For example from www.domain.com:80 I want to check if this file exists: www.domain.com:8080/images/image1.jpg. I have tried to do it with fs.exists, fs.existsSync, fs.Stats, but it on the first 2 functions it always returns false and on the fs.Stats it returns error "ENOENT, no such file or directory", but I can view the file entering url on browser. How can I do it?
The fs functions look for files on your local filesystem. If you want to see if a remote file exists, you'll have to make an HTTP request using the http module, request module or the like.