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(PureBasic) Manually Follow HTTP RedirectsDemonstrates how to manually follow redirects for an HTTP GET. Note: This example requires Chilkat v11.0.0 or greater.
IncludeFile "CkHttpResponse.pb" IncludeFile "CkHttp.pb" Procedure ChilkatExample() success.i = 0 ; 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 ; The FollowRedirects property controls whether redirects ; are automatically followed. The default behavior is to ; automatically follow redirects. ; Explicitly set FollowRedirects so that redirects are NOT automatically taken: CkHttp::setCkFollowRedirects(http, 0) resp.i = CkHttpResponse::ckCreate() If resp.i = 0 Debug "Failed to create object." ProcedureReturn EndIf success = CkHttp::ckHttpNoBody(http,"GET","http://yandex.ru/",resp) If success = 0 Debug CkHttp::ckLastErrorText(http) CkHttp::ckDispose(http) CkHttpResponse::ckDispose(resp) ProcedureReturn EndIf status.i = CkHttpResponse::ckStatusCode(resp) Debug "HTTP Response Status: " + Str(status) ; The FinalRedirectUrl property will contain the redirect URL ; If FollowRedirects was equal to 1, then all of the ; intermediate redirects (if any) would be followed until ; there were no more redirects. However, because ; FollowRedirects is not 1, FinalRedirectUrl contains ; the next redirect URL. loopCount.i = 0 While (status = 302) Debug "Redirect URL: " + CkHttp::ckFinalRedirectUrl(http) nextUrl.s = CkHttp::ckFinalRedirectUrl(http) success = CkHttp::ckHttpNoBody(http,"GET",nextUrl,resp) If success = 0 Debug CkHttp::ckLastErrorText(http) CkHttp::ckDispose(http) CkHttpResponse::ckDispose(resp) ProcedureReturn EndIf status = CkHttpResponse::ckStatusCode(resp) Debug "HTTP Response Status: " + Str(status) ; For safety, prevent infinite loops by ; keeping a loopCount and only allows following a max ; of 10 redirects: loopCount = loopCount + 1 If loopCount > 10 Debug "Too many redirects." CkHttp::ckDispose(http) CkHttpResponse::ckDispose(resp) ProcedureReturn EndIf Wend CkHttp::ckDispose(http) CkHttpResponse::ckDispose(resp) ProcedureReturn EndProcedure |
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