(Visual FoxPro) HTTP multipart/form-data Upload

Demonstrates how to upload files to an HTTP server using a multipart/form-data POST.

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

LOCAL loHttp
LOCAL loReq
LOCAL lnSuccess
LOCAL loResp

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

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

* For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.HttpRequest')
loReq = CreateObject('Chilkat.HttpRequest')
loReq.HttpVerb = "POST"
loReq.ContentType = "multipart/form-data"
loReq.Path = "rcvFormDataUpload.aspx"

* Send an "Expect: 100-continue" header in the request.
* This causes the HTTP server to end a 100-continue response
* immediately after receiving the HTTP header.  The client
* (Chilkat) will receive this intermediate response, and if
* it's not an error response, it knows that the HTTP server will
* accept the data that is forthcoming.
* The alternative is to get an error response after trying to upload
* the entire contents of the files.
loReq.AddHeader("Expect","100-continue")

* Call AddFileForUpload2 for each file to be uploaded in the HTTP multipart/form-data POST
* To allow Chilkat to determine the content-type automatically based on file-extension,
* call AddFileForUpload instead.

* The 1st arg is the filename passed in the HTTP request.
* The 2nd arg is the path in the local filesytem.
* The file is not loaded into memory.  It is streamed directly from the file
* when the HTTP POST is sent.
lnSuccess = loReq.AddFileForUpload2("starfish.jpg","c:/qa_data/starfish.jpg","image/jpg")
IF (lnSuccess <> 1) THEN
    ? loReq.LastErrorText
    RELEASE loHttp
    RELEASE loReq
    CANCEL
ENDIF

lnSuccess = loReq.AddFileForUpload("something.pdf","c:/qa_data/something.pdf")
IF (lnSuccess <> 1) THEN
    ? loReq.LastErrorText
    RELEASE loHttp
    RELEASE loReq
    CANCEL
ENDIF

* Its also possible to add a file from a string:
lnSuccess = loReq.AddStringForUpload("test.xml","test.xml","<abc>This is the test.xml content</abc>","utf-8")
* We'll assume success since no files are involved..

* This sends the HTTP request (with 3 files being uploaded) to
* http://www.mywebserver123abc.com/rcvFormDataUpload.aspx

loResp = loHttp.SynchronousRequest("www.mywebserver123abc.com",80,0,loReq)
IF (loHttp.LastMethodSuccess <> 1) THEN
    ? loHttp.LastErrorText
ELSE
    ? "HTTP response status: " + STR(loResp.StatusCode)
    * See the online reference documentation for 
    * other information that can be obtained from the response object.
    RELEASE loResp
ENDIF

* To send using SSL/TLS, do this instead.
* This sends to https://www.mywebserver123abc.com/rcvFormDataUpload.aspx
loResp = loHttp.SynchronousRequest("www.mywebserver123abc.com",443,1,loReq)
IF (loHttp.LastMethodSuccess <> 1) THEN
    ? loHttp.LastErrorText
ELSE
    ? "HTTP response status: " + STR(loResp.StatusCode)
    * See the online reference documentation for 
    * other information that can be obtained from the response object.
    RELEASE loResp
ENDIF

RELEASE loHttp
RELEASE loReq