(PureBasic) Get Response Header for Method that does not Return HttpResponse Object

Demonstrates how to get the response header and individual response header fields for a method that does not return an HTTP response object. (If a method returns an HHTTP response object, then the response header information should be obtained from the response object.)

Chilkat PureBasic Module Download Chilkat PureBasic Module

IncludeFile "CkMime.pb"
IncludeFile "CkHttp.pb"

Procedure ChilkatExample()

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

    http.i = CkHttp::ckCreate()
    If http.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    strHtml.s = CkHttp::ckQuickGetStr(http,"https://www.duckduckgo.com/")
    If CkHttp::ckLastMethodSuccess(http) = 0
        Debug CkHttp::ckLastErrorText(http)
        CkHttp::ckDispose(http)
        ProcedureReturn
    EndIf

    Debug CkHttp::ckLastResponseHeader(http)

    ; Here's a sample HTTP response header:

    ; Server: nginx
    ; Date: Wed, 30 Sep 2020 13:13:02 GMT
    ; Content-Type: text/html; charset=UTF-8
    ; Transfer-Encoding: chunked
    ; Connection: keep-alive
    ; Vary: Accept-Encoding
    ; ETag: W/"5f7371f4-1683"
    ; Strict-Transport-Security: max-age=31536000
    ; X-Frame-Options: SAMEORIGIN
    ; Content-Security-Policy: default-src https: blob: data: 'unsafe-inline' 'unsafe-eval'; frame-ancestors 'self'
    ; X-XSS-Protection: 1;mode=block
    ; X-Content-Type-Options: nosniff
    ; Referrer-Policy: origin
    ; Expect-CT: max-age=0
    ; Expires: Wed, 30 Sep 2020 13:13:01 GMT
    ; Cache-Control: no-cache
    ; Content-Encoding: gzip

    ; We can load it into a Chilkat MIME object to get header field values:
    mime.i = CkMime::ckCreate()
    If mime.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    success.i = CkMime::ckLoadMime(mime,CkHttp::ckLastResponseHeader(http))
    If success = 0
        Debug CkMime::ckLastErrorText(mime)
        CkHttp::ckDispose(http)
        CkMime::ckDispose(mime)
        ProcedureReturn
    EndIf

    ; Get MIME header field values using Chilkat MIME...
    Debug "----"
    Debug "ETag: " + CkMime::ckGetHeaderField(mime,"ETag")


    CkHttp::ckDispose(http)
    CkMime::ckDispose(mime)


    ProcedureReturn
EndProcedure