(C++) Upload File to Google Cloud Storage

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Demonstrates how to upload a file to Google Cloud Storage.

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#include <CkJsonObject.h>
#include <CkHttp.h>
#include <CkStringBuilder.h>
#include <CkHttpRequest.h>
#include <CkHttpResponse.h>

void ChilkatSample(void)
    {
    // 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"

    CkJsonObject jsonToken;
    bool success = jsonToken.LoadFile("qa_data/tokens/googleCloudStorage.json");
    if (success == false) {
        std::cout << jsonToken.lastErrorText() << "\r\n";
        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]"

    CkHttp http;
    http.put_AuthToken(jsonToken.stringOf("access_token"));

    CkStringBuilder sbPath;
    sbPath.Append("/upload/storage/v1/b/bucket_name/o?uploadType=media&name=object_name");
    int numReplaced = sbPath.Replace("bucket_name","chilkat-ocean");
    numReplaced = sbPath.Replace("object_name","penguins.jpg");

    CkHttpRequest req;
    req.put_HttpVerb("POST");
    req.put_Path(sbPath.getAsString());
    req.put_ContentType("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");

    CkHttpResponse *resp = http.SynchronousRequest("www.googleapis.com",443,true,req);
    if (http.get_LastMethodSuccess() == 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";
        delete resp;
        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/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="
    // }

    delete resp;
    }