(Visual FoxPro) HTTPS multipart/form-data POST

Demonstrates how to send a multipart/form-data POST over HTTPS (using TLS).

Note: This example requires Chilkat v11.0.0 or greater.

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

LOCAL lnSuccess
LOCAL loReq
LOCAL lcPathToFileOnDisk
LOCAL lcFileContents
LOCAL loHttp
LOCAL loResp
LOCAL lcHtmlStr

lnSuccess = 0

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

* This example demonstrates how to send a multipart/form-data POST that
* looks like this:

* 	POST /cgi/XXX.pl HTTP/1.0
* 	Accept: text/html
* 	Connection: Keep-Alive
* 	User-Agent: XXX/8.0.15
* 	Content-type: multipart/form-data, boundary=XXXxyxy
* 	Content-Length: 682
* 
* 	--XXXxyxy
* 	content-disposition: form-data; name="UploadAgent"
* 
* 	InterfaceVersion1.5
* 	--XXXxyxy
* 	content-disposition: form-data; name="user"
* 
* 	userValue
* 	--XXXxyxy
* 	content-disposition: form-data; name="password"
* 
* 	passwordValue
* 	--XXXxyxy
* 	content-disposition: form-data; name="file"
* 
* 	fileValue
* 	--XXXxyxy
* 	content-disposition: form-data; name="data_version"
* 
* 	dataVersion
* 	--XXXxyxy
* 	content-disposition: form-data; name="content2"; filename="XXX"
* 
* 	THE FILE CONTENT GOES HERE...
* 	--XXXxyxy--
* 

* First, let's build the HTTP request object
loReq = CreateObject('Chilkat.HttpRequest')

loReq.HttpVerb = "POST"
loReq.Path = "/cgi/XXX.pl"

* The boundary string is automatically generated and added by Chilkat.
* The value for the boundary string doesn't matter. (As long as it's a unique string that doesn't occur elsewhere in the request.)
loReq.ContentType = "multipart/form-data"

* Adding the Connection: Keep-Alive is optional.  It only makes sense if the intent is to send
* additional requests to the same domain (your-namespace-sb.accesscontrol.windows.net) within a reasonable time period.
loReq.AddHeader("Connection","Keep-Alive")

* --------------------------------------------------
* IMPORTANT: Never set the Content-Length header.  
* Chilkat will automatically compute the correct Content-Length and will add it.
* --------------------------------------------------

* If a specific User-Agent header field is needed, it can be added by calling AddHeader.
loReq.AddHeader("User-Agent","XXX/8.0.15")

* The "Accept" header, if present, tells the server what Content-Type responses will be accepted.
* In this case, we're telling the server that we'll only accept "text/html" responses, and therefore
* the server SHOULD only send a text/html response.  Technically, the Accept header is not required.
loReq.AddHeader("Accept","text/html")

* Add the params to the request.  Given that the Content-Type is set to "multipart/form-data", when
* Chilkat composes the request, it will put each param in it's own MIME sub-part (i.e. in it's own
* part delimited by the boundary string).
loReq.AddParam("UploadAgent","InterfaceVersion1.5")
loReq.AddParam("user","userValue")
loReq.AddParam("password","passwordValue")
loReq.AddParam("file","fileValue")
loReq.AddParam("data_version","dataVersion")

* The last param is the contents of a file.
* If it's a file on disk, we can add it like this:
lcPathToFileOnDisk = "c:/someDir/someFile.dat"
lnSuccess = loReq.AddFileForUpload("content2",lcPathToFileOnDisk)
IF (lnSuccess = 0) THEN
    ? loReq.LastErrorText
    RELEASE loReq
    CANCEL
ENDIF

* Alternatively, if the contents of the file are in memory, perhaps in a string
* variable, the file can be added like this instead.
lcFileContents = "This is the content of the file being uploaded."
lnSuccess = loReq.AddStringForUpload("content2","XXX",lcFileContents,"utf-8")

* -----------------------------------------------------------
* IMPORTANT: To duplicate the HTTP request shown above, you'll want to choose 
* either AddStringForUpload or AddFileForUpload, but not both.  It's possible to upload
* any number of files by calling AddStringForUpload and/or AddFileForUpload any number
* of times, once per file to be uploaded.  This of course assumes that the receiving
* end is programmed to receive multiple files..
* ------------------------------------------------------------

loHttp = CreateObject('Chilkat.Http')

* The request is ready... now send it using HTTPS (which is port 443 by default).

loResp = CreateObject('Chilkat.HttpResponse')
lnSuccess = loHttp.HttpSReq("www.myserver.com",443,1,loReq,loResp)
IF (lnSuccess = 0) THEN
    ? loHttp.LastErrorText
    RELEASE loReq
    RELEASE loHttp
    RELEASE loResp
    CANCEL
ENDIF

? "HTTP response status: " + STR(loResp.StatusCode)

* In this case, the response would be HTML because our Accept header
* told the server to only return HTML.  The HTML is available on the BodyStr
* property of the response object:
lcHtmlStr = loResp.BodyStr
? "Received:"
? lcHtmlStr

RELEASE loReq
RELEASE loHttp
RELEASE loResp