(Visual FoxPro) Upload Media for Google Photos

Demonstrates how to upload a media file (such as a JPG image) that will be placed in a Google Photos album. Uploading is a two-step process:

1. Upload the raw bytes to a Google Server. This doesn't result in any media items being created in the user’s Google Photos account. Instead, it returns an upload token which identifies the uploaded bytes.
2. Use the upload token to create the media item in the user’s Google Photos account. You can choose whether the media should be also added to a specific album.

This example shows step 1.

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

LOCAL loJsonToken
LOCAL lnSuccess
LOCAL loHttp
LOCAL loBdMedia
LOCAL lcUrl
LOCAL loResp

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

* Get the previously obtained access token.
* See Get Google Photos Access Token.

* For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.JsonObject')
loJsonToken = CreateObject('Chilkat.JsonObject')
lnSuccess = loJsonToken.LoadFile("qa_data/tokens/googlePhotos.json")
IF (lnSuccess = 0) THEN
    ? loJsonToken.LastErrorText
    RELEASE loJsonToken
    CANCEL
ENDIF

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

loHttp.AuthToken = loJsonToken.StringOf("access_token")

* This is the HTTPS POST we'll be sending:
* POST https://photoslibrary.googleapis.com/v1/uploads
* Authorization: Bearer OAUTH2_TOKEN
* Content-type: application/octet-stream
* X-Goog-Upload-File-Name: FILENAME
* X-Goog-Upload-Protocol: raw

loHttp.SetRequestHeader("X-Goog-Upload-File-Name","penguins.jpg")
loHttp.SetRequestHeader("X-Goog-Upload-Protocol","raw")

* Assuming the media isn't super large, we'll just read it into memory and send.
* (Another example exists for streaming a large media file directly from the filesystem.)

* Load the media file into memory.
* For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.BinData')
loBdMedia = CreateObject('Chilkat.BinData')
lnSuccess = loBdMedia.LoadFile("qa_data/jpg/penguins.jpg")

lcUrl = "https://photoslibrary.googleapis.com/v1/uploads"
loResp = loHttp.PBinaryBd("POST",lcUrl,loBdMedia,"application/octet-stream",0,0)
IF (loHttp.LastMethodSuccess = 0) THEN
    ? loHttp.LastErrorText
    RELEASE loJsonToken
    RELEASE loHttp
    RELEASE loBdMedia
    CANCEL
ENDIF

* Examine the response status code.  Success is indicated by a status code of 200.
? "response status code: " + STR(loResp.StatusCode)

* Show the response body.
IF (loResp.StatusCode = 200) THEN
    * Success.
    ? "Upload token: " + loResp.BodyStr
ELSE
    ? "Error:"
    ? loResp.BodyStr
ENDIF

RELEASE loResp

* Clear headers such as X-Goog-Upload-File-Name for subsequent HTTP requests sent on this object..
loHttp.ClearHeaders()

RELEASE loJsonToken
RELEASE loHttp
RELEASE loBdMedia