Webclient in autohotkey

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This works:

C++

URLDownloadToFile, https://www.nseindia.com/content/historical/EQUITIES/2016/JAN/cm01JAN2016bhav.csv.zip, C:\Users\Dave\Desktop\Happy.zip

But I donot understand why this does not even if the URL syntax or format is same:

C++

URLDownloadToFile, https://www.nseindia.com/content/historical/EQUITIES/2015/DEC/cm31DEC2015bhav.csv.zip, C:\Users\Dave\Desktop\Sad.zip

What I have tried:

I found the below method written in C# from social.msdn for the same issue but my AHK skills are very limited. Could you help convert the below C# to AHK?

C#

WebClient objWebClient = new WebClient();
Uri uriWebClient = new Uri(url);
objWebClient.Headers.Add("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)");
objWebClient.Headers.Add("Content-Type", "application / zip, application / octet - stream");
objWebClient.Headers.Add("Accept-Encoding", "gzip,deflate,sdch");
objWebClient.Headers.Add("Referer", "http://Something");
objWebClient.Headers.Add("Accept","text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8");
objWebClient.DownloadFile(uriWebClient, filepath);

Posted 23-Nov-18 1:30am

ChimpTrader

Updated 23-Nov-18 2:11am

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2 solutions

Solution 2

Thanks Richard,
I found this StackOverflow page.
Using the Download method and your suggestion, able to get the desired outcome.

C++

Download( UrlToFile, SaveFileAs:="", Overwrite := True, headers := "", method := "GET", postData := "")
{
	 MsgBox, %headers%
     WinHttpObj := ComObjCreate( "WinHttp.WinHttpRequest.5.1" )
     WinHttpObj.Open( method, UrlToFile )
     For header, value in headers 
         WinHttpObj.SetRequestHeader( header, value )
     WinHttpObj.Send( postData )

     ADODBObj := ComObjCreate( "ADODB.Stream" )
     ADODBObj.Type := 1
     ADODBObj.Open()
     ADODBObj.Write( WinHttpObj.ResponseBody )
     If !SaveFileAs
	 {
         urlSplitArray := StrSplit( UrlToFile, "/" )
         SaveFileAs := urlSplitArray[ urlSplitArray.MaxIndex() ]
     }        
     ADODBObj.SaveToFile( SaveFileAs, Overwrite ? 2:1 )
     ADODBObj.Close()
}

customHeaders := { "User-Agent": "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)"
				 ,"Content-Type": "application / zip, application / octet - stream""application / zip, application / octet - stream"
				 ,"Accept-Encoding": "gzip,deflate,sdch"
				 ,"Referer": "https://www.nseindia.com/products/content/equities/equities/archieve_eq.htm"
				 ,"Accept": "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8" }

Download( "https://www.nseindia.com/content/historical/EQUITIES/2015/DEC/cm31DEC2015bhav.csv.zip", "C:\Users\Dave\Desktop\Happy.zip", True, customHeaders )

Posted 23-Nov-18 2:12am

ChimpTrader

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Richard Deeming · Accepted Answer · 2018-11-23T01:44:00

Solution 1

Because the second URL returns 403: Forbidden.

That response status means you are not allowed to download that file, even if you were authenticated.

List of HTTP status codes - Wikipedia[^]
HTTP 403 - Wikipedia[^]

EDIT: Looks like the server is validating the referrer header. Change it to:

objWebClient.Headers.Add("Referer", "https://www.nseindia.com/products/content/equities/equities/archieve_eq.htm");

Posted 23-Nov-18 1:44am

Richard Deeming

Updated 23-Nov-18 1:57am

v2

Comments

ChimpTrader 23-Nov-18 7:52am

Thanks for your interest!
However, I am able to download the file from the website manually.
Link: NSE - National Stock Exchange of India Ltd.
Date(DD-MM-YYYY): 12-31-2015

Objective is to download and collect such CSVs for each day of past 10 years. So, I do not want to use IE COM, as that will make the script extremely slow.

Any other way, Richard? Thanks again....

P.S.
Please visit
https://social.msdn.microsoft.com/Forums/vstudio/en-US/31a7deb0-b135-4163-b884-3efa35ba6994/webclient-403-forbidden?forum=csharpgeneral

The code is C#, any way to get the same result in AHK?

Richard Deeming 23-Nov-18 7:57am

Looks like the server is validating the referrer header. You need to change it to:

objWebClient.Headers.Add("Referer", "https://www.nseindia.com/products/content/equities/equities/archieve_eq.htm");