Visual FoxPro

HTTP Download to Stream

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Demonstrates how to stream the response body directly to a stream, which in this case is to a file stream. Visual FoxPro

LOCAL lnSuccess
LOCAL loRest
LOCAL loUrl
LOCAL lnBAutoReconnect
LOCAL lnResponseStatusCode
LOCAL loBodyStream
LOCAL lcErrResponse

lnSuccess = 0

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

loRest = CreateObject('Chilkat.Rest')

* The URL we want to download is: 
* https://github.com/chilkatsoft/OAuth2-CSharp-Desktop/archive/master.zip
loUrl = CreateObject('Chilkat.Url')
loUrl.ParseUrl("https://github.com/chilkatsoft/OAuth2-CSharp-Desktop/archive/master.zip")

* Connect to the web server
lnBAutoReconnect = 1
lnSuccess = loRest.Connect(loUrl.Host,loUrl.Port,loUrl.Ssl,lnBAutoReconnect)
IF (lnSuccess <> 1) THEN
    ? loRest.LastErrorText
    RELEASE loRest
    RELEASE loUrl
    CANCEL
ENDIF

lnSuccess = loRest.SendReqNoBody("GET",loUrl.Path)
IF (lnSuccess <> 1) THEN
    ? loRest.LastErrorText
    RELEASE loRest
    RELEASE loUrl
    CANCEL
ENDIF

* Read the response header.
lnResponseStatusCode = loRest.ReadResponseHeader()
IF (lnResponseStatusCode < 0) THEN
    ? loRest.LastErrorText
    RELEASE loRest
    RELEASE loUrl
    CANCEL
ENDIF

? "Response status code = " + STR(lnResponseStatusCode)

* We expect a 200 response status if the file data is coming.
* Otherwise, we'll get a string response body with an error message(or no response body).
IF (lnResponseStatusCode = 200) THEN

    loBodyStream = CreateObject('Chilkat.Stream')

    * The stream's sink will be a file.
    loBodyStream.SinkFile = "qa_output/OAuth2-CSharp-Desktop/archive/master.zip"

    * Read the response body to the stream.  Given that we've
    * set the stream's sink to a file, it will stream directly
    * to the file.
    lnSuccess = loRest.ReadRespBodyStream(loBodyStream,1)
    IF (lnSuccess <> 1) THEN
        ? loRest.LastErrorText
        RELEASE loRest
        RELEASE loUrl
        RELEASE loBodyStream
        CANCEL
    ENDIF

    ? "Successfully downloaded the file."

ELSE
    lcErrResponse = loRest.ReadRespBodyString()
    IF (loRest.LastMethodSuccess <> 1) THEN
        ? loRest.LastErrorText
    ELSE
        ? lcErrResponse
    ENDIF

ENDIF

RELEASE loRest
RELEASE loUrl
RELEASE loBodyStream