(Go) Upload File to Google Cloud Storage

See more Google Cloud Storage Examples

Note: This example requires Chilkat v11.0.0 or greater.

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    success := false

    // 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 := JsonObject_Ref.html">chilkat.NewJsonObject()
    success = jsonToken.LoadFile("qa_data/tokens/googleCloudStorage.json")
    if success == false {
        fmt.Println(jsonToken.LastErrorText())
        jsonToken.DisposeJsonObject()
        return
    }

    // 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 := Http_Ref.html">chilkat.NewHttp()
    http.SetAuthToken(jsonToken.StringOf("access_token"))

    sbPath := StringBuilder_Ref.html">chilkat.NewStringBuilder()
    sbPath.Append("/upload/storage/v1/b/bucket_name/o?uploadType=media&name=object_name")
    numReplaced := sbPath.Replace("bucket_name","chilkat-bucket-b")
    numReplaced = sbPath.Replace("object_name","penguins.jpg")

    req := HttpRequest_Ref.html">chilkat.NewHttpRequest()
    req.SetHttpVerb("POST")
    req.SetPath(sbPath.GetAsString())
    req.SetContentType("image/jpeg")
    // Indicate the file to be streamed in the request body when the HTTP POST is sent.
    req.StreamBodyFromFile("qa_data/jpg/penguins.jpg")

    resp := HttpResponse_Ref.html">chilkat.NewHttpResponse()
    success = http.HttpSReq("www.googleapis.com",443,true,req,resp)
    if success == false {
        fmt.Println(http.LastErrorText())
        jsonToken.DisposeJsonObject()
        http.DisposeHttp()
        sbPath.DisposeStringBuilder()
        req.DisposeHttpRequest()
        resp.DisposeHttpResponse()
        return
    }

    responseCode := resp.StatusCode()
    if responseCode == 401 {
        fmt.Println(resp.BodyStr())
        fmt.Println("If invalid credentials, then it is likely the access token expired.")
        fmt.Println("Your app should automatically fetch a new access token and re-try.")
        jsonToken.DisposeJsonObject()
        http.DisposeHttp()
        sbPath.DisposeStringBuilder()
        req.DisposeHttpRequest()
        resp.DisposeHttpResponse()
        return
    }

    fmt.Println("Response code: ", responseCode)
    fmt.Println("Response body")
    fmt.Println(resp.BodyStr())

    // 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="
    // }

    jsonToken.DisposeJsonObject()
    http.DisposeHttp()
    sbPath.DisposeStringBuilder()
    req.DisposeHttpRequest()
    resp.DisposeHttpResponse()