[API-users] Download ZIP-File via VBA

[Reetz, Michael (NLPV)]

Hi Matt,

thanks for your help. Since I can put the URL in a browsers address field and download a file there without problems, it seems to be a restriction for MS Office and VBA. I've sent a question regarding this problem to our IT department.

Best regards
Michael


Mit freundlichen Grüßen
Im Auftrag
Michael Reetz
*****************************************
Nationalpark-Verwaltung Niedersächsisches Wattenmeer
Virchowstr. 1
26382 Wilhelmshaven
Tel.: +49 (0) 4421 911 291
Fax.: +49 (0) 441 799 61039
e-mail: michael.reetz at nlpv-wattenmeer.niedersachsen.de<mailto:michael.reetz at nlpv-wattenmeer.niedersachsen.de>
Web: http://www.<http://www.nationalpark-wattenmeer.niedersachsen.de/>nationalpark-wattenmeer.de
Flussgebietsmanagement Übergangs-/Küstengewässer
NLWKN * Betriebsstelle Brake / Oldenburg
e-mail: michael.reetz at nlwkn.niedersachsen.de<mailto:michael.reetz at nlwkn.niedersachsen.de>
Web: http://www.nlwkn.niedersachsen.de<http://www.nlwkn.niedersachsen.de/>

Von: API-users <api-users-bounces at lists.gbif.org> Im Auftrag von Matthew Blissett
Gesendet: Mittwoch, 12. Mai 2021 17:56
An: api-users at lists.gbif.org
Betreff: Re: [API-users] Download ZIP-File via VBA


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Hi Michael,

It's been a long time since I used VBA, but this routine works when I run it in Excel ­- the zip file is downloaded to the local disc:

strDownload = "0211656-200613084148143"
Set http = CreateObject("WinHttp.WinHttpRequest.5.1")
strURL_Request = "https://api.gbif.org/v1/occurrence/download/"<https://api.gbif.org/v1/occurrence/download/> & strDownload
http.Open "GET", strURL_Request, False
http.Send
Debug.Print (http.Status)

' (I have not bothered to parse the JSON output.)
strURL_ZIP = "https://api.gbif.org/v1/occurrence/download/request/0211656-200613084148143.zip"<https://smex-ctp.trendmicro.com:443/wis/clicktime/v1/query?url=https%3a%2f%2fapi.gbif.org%2fv1%2foccurrence%2fdownload%2frequest%2f0211656%2d200613084148143.zip&umid=80cb9736-359f-40eb-816d-a014d8f099b4&auth=4456e5223a495a0240a5eada979a61a7fdbe9da6-b4c1e3909bf198573829b11759f8dd7372547122>
http.Open "GET", strURL_ZIP, False
http.Send
Debug.Print (http.Status)

' From https://stackoverflow.com/questions/59598416/vba-download-form-url-with-login-that-redirect-to-another-one
Set oStream = CreateObject("ADODB.Stream")
oStream.Open
oStream.Type = 1
oStream.write http.ResponseBody
oStream.SaveToFile "C:\Users\...\Documents\download.zip", 2
oStream.Close
Debug.Print ("Completed")

Our servers don't block this query, so I think it's most likely to be a restriction on your own network / computer.  Note there is an HTTP redirect from the API server to the download server, but WinHttpRequest follows this automatically.

Kind regards,

Matt

On 12/05/2021 16:18, Reetz, Michael (NLPV) wrote:
Hello,

I'm trying to query and download occurences with some subs written in VBA. While querying works fine, download leads to errors.

At the end oft he query, I have a download link for a ZIP-archive. Putting this into a browser address field lets me download the archive. Giving it to a VBA-Object returns errors.

E.g.,

Set http = CreateObject("WinHttp.WinHttpRequest.5.1")
strURL_Request = "https://api.gbif.org/v1/occurrence/download/"<https://api.gbif.org/v1/occurrence/download/> & strDownload
http.setTimeouts 30000, 30000, 30000, 30000
http.Open "GET", strURL_Request, False
http.send

returns a jason file that contains the download link. I extract this link and use it as parameter in the next  step:

http.Open "GET", strURL_ZIP, False
http.send

This results in a timeout. Using "Microsoft.XMLHTTP" alternativly returns "Access denied"

Is this a problem with our network restrictions or does the GBIF server block the query?

Kind regards
Michael


Mit freundlichen Grüßen
Im Auftrag
Michael Reetz
*****************************************
Nationalpark-Verwaltung Niedersächsisches Wattenmeer
Virchowstr. 1
26382 Wilhelmshaven
Tel.: +49 (0) 4421 911 291
Fax.: +49 (0) 441 799 61039
e-mail: michael.reetz at nlpv-wattenmeer.niedersachsen.de<mailto:michael.reetz at nlpv-wattenmeer.niedersachsen.de>
Web: http://www.<http://www.nationalpark-wattenmeer.niedersachsen.de/>nationalpark-wattenmeer.de
Flussgebietsmanagement Übergangs-/Küstengewässer
NLWKN * Betriebsstelle Brake / Oldenburg
e-mail: michael.reetz at nlwkn.niedersachsen.de<mailto:michael.reetz at nlwkn.niedersachsen.de>
Web: http://www.nlwkn.niedersachsen.de<http://www.nlwkn.niedersachsen.de/>




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