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(PowerBuilder) HTTP Download to Stream

Demonstrates how to stream the response body directly to a stream, which in this case is to a file stream.

Chilkat ActiveX Downloads

ActiveX for 32-bit and 64-bit Windows

integer li_rc
oleobject loo_Rest
oleobject loo_Url
integer li_BAutoReconnect
integer li_Success
integer li_ResponseStatusCode
oleobject loo_BodyStream
string ls_ErrResponse

//  This example requires the Chilkat API to have been previously unlocked.
//  See Global Unlock Sample for sample code.

loo_Rest = create oleobject
li_rc = loo_Rest.ConnectToNewObject("Chilkat_9_5_0.Rest")
if li_rc < 0 then
    destroy loo_Rest
    MessageBox("Error","Connecting to COM object failed")
    return
end if

//  The URL we want to download is:
//  https://github.com/chilkatsoft/OAuth2-CSharp-Desktop/archive/master.zip
loo_Url = create oleobject
li_rc = loo_Url.ConnectToNewObject("Chilkat_9_5_0.Url")

loo_Url.ParseUrl("https://github.com/chilkatsoft/OAuth2-CSharp-Desktop/archive/master.zip")

//  Connect to the web server
li_BAutoReconnect = 1
li_Success = loo_Rest.Connect(loo_Url.Host,loo_Url.Port,loo_Url.Ssl,li_BAutoReconnect)
if li_Success <> 1 then
    Write-Debug loo_Rest.LastErrorText
    destroy loo_Rest
    destroy loo_Url
    return
end if

li_Success = loo_Rest.SendReqNoBody("GET",loo_Url.Path)
if li_Success <> 1 then
    Write-Debug loo_Rest.LastErrorText
    destroy loo_Rest
    destroy loo_Url
    return
end if

//  Read the response header.
li_ResponseStatusCode = loo_Rest.ReadResponseHeader()
if li_ResponseStatusCode < 0 then
    Write-Debug loo_Rest.LastErrorText
    destroy loo_Rest
    destroy loo_Url
    return
end if

Write-Debug "Response status code = " + string(li_ResponseStatusCode)

//  We expect a 200 response status if the file data is coming.
//  Otherwise, we'll get a string response body with an error message(or no response body).
if li_ResponseStatusCode = 200 then

    loo_BodyStream = create oleobject
    li_rc = loo_BodyStream.ConnectToNewObject("Chilkat_9_5_0.Stream")

    //  The stream's sink will be a file.
    loo_BodyStream.SinkFile = "qa_output/OAuth2-CSharp-Desktop/archive/master.zip"

    //  Read the response body to the stream.  Given that we've
    //  set the stream's sink to a file, it will stream directly
    //  to the file.
    li_Success = loo_Rest.ReadRespBodyStream(loo_BodyStream,1)
    if li_Success <> 1 then
        Write-Debug loo_Rest.LastErrorText
        destroy loo_Rest
        destroy loo_Url
        destroy loo_BodyStream
        return
    end if

    Write-Debug "Successfully downloaded the file."

else
    ls_ErrResponse = loo_Rest.ReadRespBodyString()
    if loo_Rest.LastMethodSuccess <> 1 then
        Write-Debug loo_Rest.LastErrorText
    else
        Write-Debug ls_ErrResponse
    end if

end if



destroy loo_Rest
destroy loo_Url
destroy loo_BodyStream

 

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