PureBasic

Upload File to Google Cloud Storage

See more Google Cloud Storage Examples

Demonstrates how to upload a file to Google Cloud Storage. PureBasic

IncludeFile "CkHttpResponse.pb"
IncludeFile "CkHttp.pb"
IncludeFile "CkStringBuilder.pb"
IncludeFile "CkJsonObject.pb"
IncludeFile "CkHttpRequest.pb"

Procedure ChilkatExample()

    success.i = 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"

    jsonToken.i = CkJsonObject::ckCreate()
    If jsonToken.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    success = CkJsonObject::ckLoadFile(jsonToken,"qa_data/tokens/googleCloudStorage.json")
    If success = 0
        Debug CkJsonObject::ckLastErrorText(jsonToken)
        CkJsonObject::ckDispose(jsonToken)
        ProcedureReturn
    EndIf

    ; 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]"

    http.i = CkHttp::ckCreate()
    If http.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    CkHttp::setCkAuthToken(http, CkJsonObject::ckStringOf(jsonToken,"access_token"))

    sbPath.i = CkStringBuilder::ckCreate()
    If sbPath.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    CkStringBuilder::ckAppend(sbPath,"/upload/storage/v1/b/bucket_name/o?uploadType=media&name=object_name")
    numReplaced.i = CkStringBuilder::ckReplace(sbPath,"bucket_name","chilkat-bucket-b")
    numReplaced = CkStringBuilder::ckReplace(sbPath,"object_name","penguins.jpg")

    req.i = CkHttpRequest::ckCreate()
    If req.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    CkHttpRequest::setCkHttpVerb(req, "POST")
    CkHttpRequest::setCkPath(req, CkStringBuilder::ckGetAsString(sbPath))
    CkHttpRequest::setCkContentType(req, "image/jpeg")
    ; Indicate the file to be streamed in the request body when the HTTP POST is sent.
    CkHttpRequest::ckStreamBodyFromFile(req,"qa_data/jpg/penguins.jpg")

    resp.i = CkHttpResponse::ckCreate()
    If resp.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    success = CkHttp::ckHttpSReq(http,"www.googleapis.com",443,1,req,resp)
    If success = 0
        Debug CkHttp::ckLastErrorText(http)
        CkJsonObject::ckDispose(jsonToken)
        CkHttp::ckDispose(http)
        CkStringBuilder::ckDispose(sbPath)
        CkHttpRequest::ckDispose(req)
        CkHttpResponse::ckDispose(resp)
        ProcedureReturn
    EndIf

    responseCode.i = CkHttpResponse::ckStatusCode(resp)
    If responseCode = 401
        Debug CkHttpResponse::ckBodyStr(resp)
        Debug "If invalid credentials, then it is likely the access token expired."
        Debug "Your app should automatically fetch a new access token and re-try."
        CkJsonObject::ckDispose(jsonToken)
        CkHttp::ckDispose(http)
        CkStringBuilder::ckDispose(sbPath)
        CkHttpRequest::ckDispose(req)
        CkHttpResponse::ckDispose(resp)
        ProcedureReturn
    EndIf

    Debug "Response code: " + Str(responseCode)
    Debug "Response body"
    Debug CkHttpResponse::ckBodyStr(resp)

    ; A successful response looks like this:
    ; Response code: 200
    ; Response body
    ; {
    ;  "kind": "storage#object",
    ;  "id": "chilkat-ocean/penguins.jpg/1502643657837855",
    ;  "selfLink": "https://www.googleapis.com/storage/v1/b/chilkat-ocean/o/penguins.jpg",
    ;  "name": "penguins.jpg",
    ;  "bucket": "chilkat-ocean",
    ;  "generation": "1502643657837855",
    ;  "metageneration": "1",
    ;  "contentType": "image/jpeg",
    ;  "timeCreated": "2017-08-13T17:00:57.811Z",
    ;  "updated": "2017-08-13T17:00:57.811Z",
    ;  "storageClass": "MULTI_REGIONAL",
    ;  "timeStorageClassUpdated": "2017-08-13T17:00:57.811Z",
    ;  "size": "777835",
    ;  "md5Hash": "nTd7EM53jEk4s8fixjoimg==",
    ;  "mediaLink": "https://www.googleapis.com/download/storage/v1/b/chilkat-ocean/o/penguins.jpg?generation=1502643657837855&alt=media",
    ;  "crc32c": "ixxYVw==",
    ;  "etag": "CJ+azOvX1NUCEAE="
    ; }


    CkJsonObject::ckDispose(jsonToken)
    CkHttp::ckDispose(http)
    CkStringBuilder::ckDispose(sbPath)
    CkHttpRequest::ckDispose(req)
    CkHttpResponse::ckDispose(resp)


    ProcedureReturn
EndProcedure