C++

Upload In-Memory Binary Data to Google Cloud Storage

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Demonstrates how to upload in-memory binary data to Google Cloud Storage. C++

#include <CkStringBuilder.h>
#include <CkHttp.h>
#include <CkBinData.h>
#include <CkHttpResponse.h>

void ChilkatSample(void)
    {
    bool 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"

    // 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..
    CkStringBuilder sbToken;
    sbToken.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]"

    CkHttp http;

    // Download a JPG image from the Internet, and then upload this JPG to
    // a Google Storage bucket.
    const char *jpgUrl = "https://www.chilkatsoft.com/images/starfish.jpg";

    CkBinData jpgData;
    success = http.DownloadBd(jpgUrl,jpgData);
    if (success == false) {
        std::cout << http.lastErrorText() << "\r\n";
        return;
    }

    http.put_AuthToken(sbToken.getAsString());

    // Construct a URL to upload to an object named "starfish.jpg" in the "chilkat-ocean" bucket.
    http.SetUrlVar("bucket_name","chilkat-ocean");
    http.SetUrlVar("object_name","starfish.jpg");
    const char *url = "https://www.googleapis.com/upload/storage/v1/b/{$bucket_name}/o?uploadType=media&name={$object_name}";

    CkHttpResponse resp;
    success = http.HttpBd("POST",url,jpgData,"image/jpeg",resp);
    if (success == false) {
        std::cout << http.lastErrorText() << "\r\n";
        return;
    }

    int responseCode = resp.get_StatusCode();
    if (responseCode == 401) {
        std::cout << resp.bodyStr() << "\r\n";
        std::cout << "If invalid credentials, then it is likely the access token expired." << "\r\n";
        std::cout << "Your app should automatically fetch a new access token and re-try." << "\r\n";
        return;
    }

    std::cout << "Response code: " << responseCode << "\r\n";
    std::cout << "Response body" << "\r\n";
    std::cout << resp.bodyStr() << "\r\n";

    // A successful response looks like this:
    // Response code: 200
    // Response body
    // {
    //  "kind": "storage#object",
    //  "id": "chilkat-ocean/starfish.jpg/1502670320090292",
    //  "selfLink": "https://www.googleapis.com/storage/v1/b/chilkat-ocean/o/starfish.jpg",
    //  "name": "starfish.jpg",
    //  "bucket": "chilkat-ocean",
    //  "generation": "1502670320090292",
    //  "metageneration": "1",
    //  "contentType": "image/jpeg",
    //  "timeCreated": "2017-08-14T00:25:20.040Z",
    //  "updated": "2017-08-14T00:25:20.040Z",
    //  "storageClass": "MULTI_REGIONAL",
    //  "timeStorageClassUpdated": "2017-08-14T00:25:20.040Z",
    //  "size": "6229",
    //  "md5Hash": "LpxZ2/JmI2fcl9/dqF2gSA==",
    //  "mediaLink": "https://www.googleapis.com/download/storage/v1/b/chilkat-ocean/o/starfish.jpg?generation=1502670320090292&alt=media",
    //  "crc32c": "9RjgwQ==",
    //  "etag": "CLT5kpW71dUCEAE="
    // }
    }