Downloading a file from specified URL

Question

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Dear Developers,

I want to download a bhav copy from www.nseindia.com.

I tried the following code but it gives the error.

VB

Private Sub Button7_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button7.Click
        Try
            Dim wc As New WebClient
            Dim savefile As New SaveFileDialog
            Dim fileurl As String = "www.nseindia.com/content/historical/EQUITIES/2012/AUG/cm28AUG2012bhav.csv.zip"
            Dim filelocation As String = "c:\cm28AUG2012bhav.csv.zip"
            wc.DownloadFile(fileurl, filelocation)
          
        Catch exception As FileTransferException
            MsgBox("CAnnot Download")
        End Try

    End Sub

It is not taking the url without "http:\\"

The url specified in the fileurl is working if it is pasted in browser.But in the code it is giving error.

Please specific the solution for the same.

Thanks & Regards.

Posted 28-Aug-12 5:59am

vinay.sarmalkar

Updated 28-Aug-12 6:01am

Wes Aday

v2

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Comments

[no name] 28-Aug-12 12:02pm

It's really very helpful to know what the exact error is....

Christian Graus 28-Aug-12 12:06pm

The error means what it says, but we don't know what it says.

bbirajdar 28-Aug-12 14:06pm

Are you a software developer ? Can you solve somebody else's problem if he comes to you and says ' it gives error' ?

4 solutions

Solution 1

After trying your code which is correct you need to look at the exception that is raised

The remote server returned an error: (403) Forbidden.

looks like you can't download it in this way.

Posted 28-Aug-12 6:14am

Simon_Whale

Solution 2

use default credentials.

C#

wc.UseDefaultCrdentials = True

thanks,

Kuthuparakkal

Posted 28-Aug-12 6:54am

Kuthuparakkal

Comments

vinay.sarmalkar 28-Aug-12 13:27pm

DEAR Kuthuparakkal,

I TRIED YOUR SOLUTION TOO BUT IT ALSO NOT WORKING.

PLEASE TELL ME AFTER WHICH LINE I HAVE TO SPECIFY THE ABOVE CODE LINE & WHAT URL I HAVE TO SPECIFY MEANS URL WITHOUT "HTTP://" WHICH I HAVE SPECIFIED IN MY QUESTION OR URL WITH "HTTP://"?

THANKS & REGARDS.

Solution 4

it should work

VB

clnt.Proxy = New WebProxy("http://nseindia.com", True)

clnt.Headers("Accept") = "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8"

clnt.Headers("User-Agent") = "Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.1 (KHTML, like Gecko) Chrome/21.0.1180.83 Safari/537.1"
clnt.DownloadFile(fileurl, DATAFILEDIR & "/temp/" & outfilename)

Posted 12-Jan-15 8:33am

pkgvrpdm

Comments

CHill60 12-Jan-15 14:38pm

Please don't post solutions to old posts that have already been resolved

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Sandip.Nascar · Accepted Answer · 2012-08-28T07:11:00

Solution 3

You need to pass the alid header to work.

I have checked the nse url and found two headers you must need to add to allow the remote server to accept your download,

wc.Headers("Accept") =    "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8"

wc.Headers("User-Agent") = "Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.1 (KHTML, like Gecko) Chrome/21.0.1180.83 Safari/537.1"

Adding these 2 lines just before your DownloadFile will definitely work.

Good luck.
cheers

Posted 28-Aug-12 7:11am

Sandip.Nascar

Comments

vinay.sarmalkar 28-Aug-12 13:25pm

DEAR SANDIP,
I JUST TRIED THE SAME BUT STILL NOT RESULT.
CAN U TELL ME EXACTLY WHAT URL I HAVE TO SPECIFY MEANS URL WITHOUT "HTTP://" WHICH I HAVE SPECIFIED IN MY QUESTION OR URL WITH "HTTP://"?

THANKS & REGARDS.

Sandip.Nascar 28-Aug-12 13:36pm

you need to put http:// other wise the url cannot be recognized.

Here is the code,
Private Sub Button1_Click(sender As System.Object, e As System.EventArgs) Handles Button1.Click
Try
Dim wc As New WebClient

Dim fileurl As String = "http://www.nseindia.com/content/historical/EQUITIES/2012/AUG/cm28AUG2012bhav.csv.zip"
Dim filelocation As String = "d:\aaaaa.zip"

wc.Headers("Accept") = "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8"
wc.Headers("User-Agent") = "Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.1 (KHTML, like Gecko) Chrome/21.0.1180.83 Safari/537.1"

wc.DownloadFile(fileurl, filelocation)

Catch exception As Exception
MsgBox("CAnnot Download")
End Try
End Sub

kunaljvyas 6-Apr-19 5:05am

hi @Sandip.Nascar, thanks a lot for sharing this code. i was trying to use your suggested code.
its working for dates only after 2016-jan-01. not for any files prior to this date. i tried fiddler and changing the headers. but not working.
download manager can still download with the same link. pls help to solve this.

Sandip.Nascar 28-Aug-12 13:38pm

if this is not working, trap the error, if it is not 403, check whether your C: drive has a write permission.

vinay.sarmalkar 28-Aug-12 15:19pm

Thanxs Bro..it's working fine..Thanxs alot for the help..

Please let me know where i can find the information for the below mention coding lines:

wc.Headers("Accept") = "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8"

wc.Headers("User-Agent") = "Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.1 (KHTML, like Gecko) Chrome/21.0.1180.83 Safari/537.1"

Thanks & Regards