(Visual FoxPro) Initialize an HTTP Request from a URL

Demonstrates how to initialize an HTTP request object from a URL.

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

LOCAL loReq
LOCAL i
LOCAL lnNumParams

* For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.HttpRequest')
loReq = CreateObject('Chilkat.HttpRequest')

* Loads the HTTP request object from a URL
loReq.SetFromUrl("https://www.youtube.com/watch?v=fAZdTchQePc&t=45s")

* The verb will be "GET"
? "verb = " + loReq.HttpVerb
* The path will be "/watch"
? "path = " + loReq.Path

* The output of this loop will be
* 0) v: fAZdTchQePc
* 1) t: 45s

lnNumParams = loReq.NumParams
FOR i = 0 TO lnNumParams - 1
    ? STR(i) + ") " + loReq.GetParamName(i) + ": " + loReq.GetParamValue(i)
NEXT

* View the request that would be sent if SynchronousRequest is called.
* The HTTP request will be a GET that looks like this:
* 
*     GET /watch?v=fAZdTchQePc&t=45s HTTP/1.1
*     Host: domain
* 
* Note: The HOST header will automatically get filled in with the actual domain when SynchronousRequest is called.

? loReq.GenerateRequestText()

* We can add additional params
loReq.AddParam("artist","Richard Bona")
loReq.AddParam("musicType","Jazz")
loReq.AddParam("festival","Estival Jazz Lugano")
loReq.AddParam("year","2008")

* Now examine the request that would be sent
* 
*     GET /watch?v=fAZdTchQePc&t=45s&artist=Richard%20Bona&musicType=Jazz&festival=Estival%20Jazz%20Lugano&year=2008 HTTP/1.1
*     Host: domain
* 
? loReq.GenerateRequestText()

* We can remove a parameter:
loReq.RemoveParam("t")
? loReq.GenerateRequestText()

* What happens if we change the request from a GET to a POST?
loReq.HttpVerb = "POST"
* The request will now look like this:
* 
*    POST /watch HTTP/1.1
*    Host: domain
*    Content-Length: 93
*    
*    v=fAZdTchQePc&artist=Richard%20Bona&musicType=Jazz&festival=Estival%20Jazz%20Lugano&year=2008
* 
? loReq.GenerateRequestText()

* What happens if we make it a multipart/form-data?
loReq.ContentType = "multipart/form-data"
* Now the POST looks like this:
*    
*    POST /watch HTTP/1.1
*    Content-Type: multipart/form-data; boundary=------------020906020106050705030807
*    Host: domain
*    Content-Length: 545
*    
*    --------------020906020106050705030807
*    Content-Disposition: form-data; name="v"
*    
*    fAZdTchQePc
*    --------------020906020106050705030807
*    Content-Disposition: form-data; name="artist"
*    
*    Richard Bona
*    --------------020906020106050705030807
*    Content-Disposition: form-data; name="musicType"
*    
*    Jazz
*    --------------020906020106050705030807
*    Content-Disposition: form-data; name="festival"
*    
*    Estival Jazz Lugano
*    --------------020906020106050705030807
*    Content-Disposition: form-data; name="year"
*    
*    2008
*    --------------020906020106050705030807--

? loReq.GenerateRequestText()

RELEASE loReq