(C++) Initiate Resumable Upload Session

See more Google Cloud Storage Examples

Initiate a Google Cloud Storage resumable upload session..

For more information, see https://cloud.google.com/storage/docs/performing-resumable-uploads

Chilkat C/C++ Library Downloads
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#include <CkHttp.h>
#include <CkJsonObject.h>
#include <CkHttpResponse.h>

void ChilkatSample(void)
    {
    // This example assumes the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    CkHttp http;

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

    CkJsonObject jsonMetaData;
    jsonMetaData.UpdateString("contentType","image/jpeg");

    // Adds the "Authorization: Bearer <access_token>" header..
    http.put_AuthToken(jsonToken.stringOf("access_token"));

    http.SetUrlVar("bucket_name","chilkat-bucket-b");
    http.SetUrlVar("object_name","penguins2.jpg");
    const char *url = "https://storage.googleapis.com/upload/storage/v1/b/{$bucket_name}/o?uploadType=resumable&name={$object_name}";
    CkHttpResponse *resp = http.PText("POST",url,jsonMetaData.emit(),"utf-8","application/json",false,false);
    if (http.get_LastMethodSuccess() == false) {
        std::cout << http.lastErrorText() << "\r\n";
        return;
    }

    int statusCode = resp->get_StatusCode();
    std::cout << "response status code = " << statusCode << "\r\n";

    const char *sessionUrl = "";

    if (statusCode != 200) {
        std::cout << resp->bodyStr() << "\r\n";
    }
    else {
        // The session URL will be used to upload the file in chunks, in subsequent HTTP POSTs...
        sessionUrl = resp->getHeaderField("Location");
        std::cout << "Session URL = " << sessionUrl << "\r\n";
    }

    delete resp;
    }