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Node Express to Upload Files to Server Using HTML Form Using multiparty Library in Browser
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Jun 7, 2025
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0:01
uh hello guys uh welcome to this uh live
0:04
stream so in this live stream I will
0:06
show you yet another NodeJS and express
0:09
uh package or library which allows you
0:11
to upload files to the server using an
0:14
HTML form so this will be the
0:16
application we will be building and we
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will have a simple HTML form where the
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user can choose a file and then upload
0:23
that to the server and we'll be storing
0:26
all these image files or any files that
0:28
you upload in the uploads directory
0:31
automatically all these files will be
0:33
stored right here so let me just delete
0:35
everything and start from scratch so we
0:38
have this application right here if I
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choose a particular file let's suppose I
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want to upload some kind of an
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image i select the image this is
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actually you can see it's a JPG file and
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then as I click the upload button you
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will see you will get this notification
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that file is uploaded and uh if I check
0:58
the folder you will see the file will be
1:01
there in the uploads directory so
1:03
automatically the file has been
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transferred and similarly if I want to
1:09
upload any any other file again if I
1:11
choose file click the select the JPG
1:15
file and click upload you'll once again
1:19
see the second file will get
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uploaded so actually the package that we
1:24
are using here is
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multi-arty so this is a very popular
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package
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inside NodeJS which supports parsing of
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HTML forms so the command is simple you
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simply install this package i've already
1:41
installed it it's almost having 578,000
1:45
weekly downloads so now I will show you
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a complete example for this I will
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delete everything and start from scratch
1:55
so first of all just create a uploads
1:57
directory where you will be storing all
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the files which will get uploaded just
2:02
create this
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folder and then we will simply create
2:08
this index.js file so right inside this
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we will import first of all all the
2:14
necessary packages so we'll import the
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express package
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then we also need to
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import the multi-party package as well
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by like this and then we also need to
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import the built-in packages which is
2:30
the file system module and the path
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module and then we will simply
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instantiate a simple express app and
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this express app will listen on 5,000
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port number
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so here we can inside the call back
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function we can simply say that app is
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listening
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on port 5000 and right here we can show
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a simple HTML form so when the user
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visits this homepage you can simply
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say you can send out this file response
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dot send file and in the same
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directory we create this index.html file
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so right here in the root directory you
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will simply create this index html file
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this will be a simple form which will be
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shown to the user and inside this form
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we
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will have a simple
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form so the method of the form will be
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post encoding type multiart form data
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and inside this we will have a simple
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input type file give it a name attribute
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as well and then we'll be having a
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simple button to upload the
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file so here we also need to provide a
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action attribute to this form so
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whenever the form is submitted it will
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be going to this /upload route it will
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be a post request so at this moment of
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time if you go to localhost
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5,000 and if you try to upload a file
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you will get this error message that
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cannot post /upload this post request
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you need to make inside your index.js
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file so now just go to this file and
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just make a simple post request
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/upload so inside this post request you
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just need to
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uh upload the files for uploading the
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files we need to get access to the form
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and here we will be initializing this
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library multi-arty it contains this form
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class and here you need to pass where
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you will be uploading all your files so
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here you need to pass the uploads
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directory so I just created this uploads
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directory right here if you see so we
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just need to provide the location so we
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instantiating this library after this
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this library contains a method of parse
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this function will be responsible for
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parsing whatever data is coming through
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the form it will take this data and if
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any sort of call back it is actually
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call back
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function and all the files will be there
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inside this
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so we need to get access to the file so
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we can easily get access to the files
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using files and file
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zero and then we can send out a
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notification message that your file has
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been successfully uploaded so we can
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send out this
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message so you will see file is uploaded
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so that's all that we need to do and if
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you refresh your application just go to
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localhost 5,000 and here you choose a
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file click on upload and you will get
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this notification that your file has
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been uploaded and if you check the
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directory the file is present and you
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can repeat this for multiple files
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select this one click upload
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so in this easy way you can use this
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library as well which is the
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configuration part is very simple just
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install this package and initialize this
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library by including it and then inside
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the post request you basically provide
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the location where you are saving the
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files and then it contains this parse
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function which is responsible for
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getting access to the file and then we
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simply upload this so thank you very
6:29
much guys for watching this video and
6:31
also check out my website
6:34
freemediatools.com which contains
6:36
unlimited tools regarding audio video
6:38
and image and I will be seeing you guys
6:41
in the next live stream