Xbase++ Requires Chilkat v11.0.0+
Upload String to Google Cloud Storage

Demonstrates how to upload an in-memory string to Google Cloud Storage.
Chilkat Xbase++ Downloads

Xbase++
LOCAL nSuccess
LOCAL oSbToken
LOCAL oHttp
LOCAL oXml
LOCAL oSbXml
LOCAL cUrl
LOCAL oResp
LOCAL nResponseCode

nSuccess := 0

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

//  This example uses a previously obtained access token having permission for the 
//  scope "https://www.googleapis.com/auth/cloud-platform"

//  In this example, Get Google Cloud Storage OAuth2 Access Token, 
//  the service account access token was saved to a text file.  This example fetches the access token from the file..
oSbToken := CreateObject("Chilkat.StringBuilder")
oSbToken:LoadFile("qa_data/tokens/googleCloudStorageAccessToken.txt", "utf-8")

//  Send a POST equivalent to this curl command.
//  The content of the file is contained in the request body.

//  curl -X POST --data-binary @[OBJECT] \
//      -H "Authorization: Bearer [OAUTH2_TOKEN]" \
//      -H "Content-Type: [OBJECT_CONTENT_TYPE]" \
//      "https://www.googleapis.com/upload/storage/v1/b/[BUCKET_NAME]/o?uploadType=media&name=[OBJECT_NAME]"

oHttp := CreateObject("Chilkat.Http")
oHttp:AuthToken := oSbToken:GetAsString()

//  Create an XML document, and write it to a StringBuilder.
//  We'll be uploading this XML document.
oXml := CreateObject("Chilkat.Xml")
oXml:Tag := "note"
oXml:UpdateChildContent("to", "Tove")
oXml:UpdateChildContent("from", "Jani")
oXml:UpdateChildContent("heading", "Reminder")
oXml:UpdateChildContent("body", "Don't forget me this weekend!")

//  Write the XML to sbXml.
oSbXml := CreateObject("Chilkat.StringBuilder")
oXml:GetXmlSb(oSbXml)

//  sbXml contains this:

//  <note>
//      <to>Tove</to>
//      <from>Jani</from>
//      <heading>Reminder</heading>
//      <body>Don't forget me this weekend!</body>
//  </note>

//  Construct a URL to upload to an object named "test.xml" in the "chilkat-ocean" bucket.
oHttp:SetUrlVar("bucket_name", "chilkat-ocean")
oHttp:SetUrlVar("object_name", "test.xml")
cUrl := "https://www.googleapis.com/upload/storage/v1/b/{$bucket_name}/o?uploadType=media&name={$object_name}"

oResp := CreateObject("Chilkat.HttpResponse")
nSuccess := oHttp:HttpSb("POST", cUrl, oSbXml, "utf-8", "application/xml", oResp)
IF (nSuccess == 0)
    ? oHttp:LastErrorText
    oSbToken:destroy()
    oHttp:destroy()
    oXml:destroy()
    oSbXml:destroy()
    oResp:destroy()
    RETURN
ENDIF

nResponseCode := oResp:StatusCode
IF (nResponseCode == 401)
    ? oResp:BodyStr
    ? "If invalid credentials, then it is likely the access token expired."
    ? "Your app should automatically fetch a new access token and re-try."
    oSbToken:destroy()
    oHttp:destroy()
    oXml:destroy()
    oSbXml:destroy()
    oResp:destroy()
    RETURN
ENDIF

? "Response code: " + Str(nResponseCode)
? "Response body"
? oResp:BodyStr

//  A successful response looks like this:
//  Response code: 200
//  Response body
//  {
//   "kind": "storage#object",
//   "id": "chilkat-ocean/test.xml/1502669565429870",
//   "selfLink": "https://www.googleapis.com/storage/v1/b/chilkat-ocean/o/test.xml",
//   "name": "test.xml",
//   "bucket": "chilkat-ocean",
//   "generation": "1502669565429870",
//   "metageneration": "1",
//   "contentType": "application/xml",
//   "timeCreated": "2017-08-14T00:12:45.379Z",
//   "updated": "2017-08-14T00:12:45.379Z",
//   "storageClass": "MULTI_REGIONAL",
//   "timeStorageClassUpdated": "2017-08-14T00:12:45.379Z",
//   "size": "181",
//   "md5Hash": "TCR0L7TWsw2TzOvfNvgEfA==",
//   "mediaLink": "https://www.googleapis.com/download/storage/v1/b/chilkat-ocean/o/test.xml?generation=1502669565429870&alt=media",
//   "crc32c": "ZFd5sA==",
//   "etag": "CO6Qpq241dUCEAE="
//  }

oSbToken:destroy()
oHttp:destroy()
oXml:destroy()
oSbXml:destroy()
oResp:destroy()