Visual FoxPro

WhatsApp - Send a Previously Uploaded Media Message

Demonstrates how to send a media message where the media content was previously uploaded. Visual FoxPro

LOCAL lnSuccess
LOCAL loHttp
LOCAL loJson
LOCAL loResp
LOCAL loSbResponseBody
LOCAL loJResp
LOCAL lnRespStatusCode
LOCAL lcId
LOCAL i
LOCAL lnCount_i

lnSuccess = 0

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

loHttp = CreateObject('Chilkat.Http')

* Implements the following CURL command:

* curl -X POST https://example.com/v1/messages \
*   -H "Authorization: Bearer your-auth-token" \
*   -d '
* {
*     "recipient_type": "individual-or-group",
*     "to": "whatsapp-id-or-group-id",
*     "type": "image",
*     "image": {
*      "id": "your-media-id",
*       "caption": "your-image-caption"
*     }
* }'

* Use the following online tool to generate HTTP code from a CURL command
* Convert a cURL Command to HTTP Source Code

* Use this online tool to generate code from sample JSON:
* Generate Code to Create JSON

* The following JSON is sent in the request body.

* {
*   "recipient_type": "individual-or-group",
*   "to": "whatsapp-id-or-group-id",
*   "type": "image",
*   "image": {
*     "id": "your-media-id",
*     "caption": "your-image-caption"
*   }
* }

loJson = CreateObject('Chilkat.JsonObject')
loJson.UpdateString("recipient_type","individual-or-group")
loJson.UpdateString("to","whatsapp-id-or-group-id")
loJson.UpdateString("type","image")
loJson.UpdateString("image.id","your-media-id")
loJson.UpdateString("image.caption","your-image-caption")

* Adds the "Authorization: Bearer your-auth-token" header.
loHttp.AuthToken = "your-auth-token"

loResp = CreateObject('Chilkat.HttpResponse')
lnSuccess = loHttp.HttpJson("POST","https://example.com/v1/messages",loJson,"application/json",loResp)
IF (lnSuccess = 0) THEN
    ? loHttp.LastErrorText
    RELEASE loHttp
    RELEASE loJson
    RELEASE loResp
    CANCEL
ENDIF

loSbResponseBody = CreateObject('Chilkat.StringBuilder')
loResp.GetBodySb(loSbResponseBody)
loJResp = CreateObject('Chilkat.JsonObject')
loJResp.LoadSb(loSbResponseBody)
loJResp.EmitCompact = 0

? "Response Body:"
? loJResp.Emit()

lnRespStatusCode = loResp.StatusCode
? "Response Status Code = " + STR(lnRespStatusCode)
IF (lnRespStatusCode >= 400) THEN
    ? "Response Header:"
    ? loResp.Header
    ? "Failed."
    RELEASE loHttp
    RELEASE loJson
    RELEASE loResp
    RELEASE loSbResponseBody
    RELEASE loJResp
    CANCEL
ENDIF

* Sample JSON response:
* (Sample code for parsing the JSON response is shown below)

* {
*   "messages": [
*     {
*       "id": "gBEGkYiEB1VXAglK1ZEqA1YKPrU"
*     }
*   ]
* }

* Sample code for parsing the JSON response...
* Use the following online tool to generate parsing code from sample JSON:
* Generate Parsing Code from JSON

i = 0
lnCount_i = loJResp.SizeOfArray("messages")
DO WHILE i < lnCount_i
    loJResp.I = i
    lcId = loJResp.StringOf("messages[i].id")
    i = i + 1
ENDDO

RELEASE loHttp
RELEASE loJson
RELEASE loResp
RELEASE loSbResponseBody
RELEASE loJResp