PowerBuilder

Get Size of File on Web Server

See more HTTP Examples

Demonstrates how to send a HEAD request to fetch information about a file on a web server, which hopefully includes the Content-Length in the response header. PowerBuilder

integer li_rc
integer li_Success
oleobject loo_Http
oleobject loo_Resp
string ls_ContentLengthStr

li_Success = 0

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

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

loo_Resp = create oleobject
li_rc = loo_Resp.ConnectToNewObject("Chilkat.HttpResponse")

li_Success = loo_Http.HttpNoBody("HEAD","https://nodejs.org/dist/v10.16.1/node-v10.16.1-win-x64.zip",loo_Resp)
if li_Success = 0 then
    Write-Debug loo_Http.LastErrorText
    destroy loo_Http
    destroy loo_Resp
    return
end if

// Examine the response header.
Write-Debug loo_Resp.Header

// Here is a sample response header:

// Date: Thu, 01 Aug 2019 12:47:27 GMT
// Content-Type: application/zip
// Content-Length: 17457922
// Connection: keep-alive
// Set-Cookie: __cfduid=da5b78dcdd8171683c5a578eb9c9f88c81564663647; expires=Fri, 31-Jul-20 12:47:27 GMT; path=/; domain=.nodejs.org; HttpOnly
// Last-Modified: Wed, 31 Jul 2019 18:21:57 GMT
// ETag: "5d41dc45-10a6302"
// Accept-Ranges: bytes
// Expect-CT: max-age=604800, report-uri="https://report-uri.cloudflare.com/cdn-cgi/beacon/expect-ct"
// Server: cloudflare
// CF-RAY: 4ff7ebb32ac4e1e2-ORD

// Get the Content-Length header.
ls_ContentLengthStr = loo_Resp.GetHeaderField("Content-Length")
// If the header exists...
if loo_Resp.LastMethodSuccess = 1 then
    Write-Debug "Content-Length: " + ls_ContentLengthStr
    // Your application can convert the contentLengthStr to an integer and then use it....
end if



destroy loo_Http
destroy loo_Resp