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PB5.72 - New HTTP feature to read headers not working
Posted: Tue May 19, 2020 10:29 pm
by nalor
Hi!
Please help me - I can't figure out how to use the new feature to get the http headers.
Here's my example:
Code: Select all
EnableExplicit
Define sUrl.s="https://www.purebasic.com/download/PureBasic_Demo.zip"
Define iConn.i
Define iProgress.i
InitNetwork()
iConn=ReceiveHTTPMemory(sUrl, #PB_HTTP_Asynchronous)
If Not iConn
Debug "Error"
End
EndIf
Debug "Headers >"+HTTPInfo(iConn, #PB_HTTP_Headers)+"<"
Repeat
iProgress = HTTPProgress(iConn)
Select iProgress
Case #PB_HTTP_Success
Debug "iConn finished (size: )"
End
Case #PB_HTTP_Failed
Debug "iConn failed"
FinishHTTP(iConn)
End
Case #PB_HTTP_Aborted
Debug "iConn aborted"
FinishHTTP(iConn)
End
Default
Debug "Headers >"+HTTPInfo(iConn, #PB_HTTP_Headers)+"<"
Debug "Current iConn: " + iProgress
EndSelect
Delay(500) ; Don't stole the whole CPU
ForEver
But the command >HTTPInfo(iConn, #PB_HTTP_Headers)< never returns anything useful.
Where's my error?
Thanks for help
Re: PB5.72 - New HTTP feature to read headers not working
Posted: Tue May 19, 2020 10:38 pm
by helpy
Read PureBasic help and check the syntax of ReceiveHTTPMemory() ...
Re: PB5.72 - New HTTP feature to read headers not working
Posted: Tue May 19, 2020 11:14 pm
by nalor
But I don't want the data in my example - all I want is the headers ... to read the contentsize from it and calculate the progress during the async download.
(I know in my example the data is just buffered and finally lost because it's never read from the buffer - but I only care about 'HTTInfo' that isn't working as expected.)
Before 5.72 it wasn't possible with a single request to get the headers and download, but now it should be - just that I can't figure out how to use the new feature correctly.
Re: PB5.72 - New HTTP feature to read headers not working
Posted: Wed May 20, 2020 7:08 am
by infratec
As you can read in the help of HTTPInfo(),
it is only valid for HTTPRequest() and HTTPRequestMemory()
and not for ReceiveHTTPMemory()
So you need
Code: Select all
EnableExplicit
Define sUrl.s="https://www.purebasic.com/download/PureBasic_Demo.zip"
Define iConn.i
Define iProgress.i
InitNetwork()
iconn = HTTPRequest(#PB_HTTP_Get, sUrl, "", #PB_HTTP_HeadersOnly)
If iconn
Debug "Headers >"+HTTPInfo(iConn, #PB_HTTP_Headers)+"<"
FinishHTTP(iconn)
EndIf
iConn=ReceiveHTTPMemory(sUrl, #PB_HTTP_Asynchronous)
If Not iConn
Debug "Error"
End
EndIf
Repeat
iProgress = HTTPProgress(iConn)
Select iProgress
Case #PB_HTTP_Success
Debug "iConn finished (size: )"
End
Case #PB_HTTP_Failed
Debug "iConn failed"
FinishHTTP(iConn)
End
Case #PB_HTTP_Aborted
Debug "iConn aborted"
FinishHTTP(iConn)
End
Default
Debug "Current iConn: " + iProgress
EndSelect
Delay(500) ; Don't stole the whole CPU
ForEver
#PB_HTTP_HeadersOnly does only fetch the header and not the content.
Re: PB5.72 - New HTTP feature to read headers not working
Posted: Wed May 20, 2020 11:43 am
by helpy
helpy wrote:Read PureBasic help and check the syntax of ReceiveHTTPMemory() ...
... oops... sorry... I have confused the two commands ReceiveHTTPMemory and HTTPRequestMemory.
Re: PB5.72 - New HTTP feature to read headers not working
Posted: Wed May 20, 2020 9:30 pm
by nalor
Thanks for the help! Didn't notice this small detail ...
Problem solved