(Unicode C) Initiate Resumable Upload Session

See more Google Cloud Storage Examples

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

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#include <C_CkHttpW.h>
#include <C_CkJsonObjectW.h>
#include <C_CkHttpResponseW.h>

void ChilkatSample(void)
    {
    HCkHttpW http;
    HCkJsonObjectW jsonToken;
    BOOL success;
    HCkJsonObjectW jsonMetaData;
    const wchar_t *url;
    HCkHttpResponseW resp;
    int statusCode;
    const wchar_t *sessionUrl;

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

    http = CkHttpW_Create();

    jsonToken = CkJsonObjectW_Create();
    success = CkJsonObjectW_LoadFile(jsonToken,L"qa_data/tokens/googleCloudStorage.json");
    if (success == FALSE) {
        wprintf(L"%s\n",CkJsonObjectW_lastErrorText(jsonToken));
        CkHttpW_Dispose(http);
        CkJsonObjectW_Dispose(jsonToken);
        return;
    }

    jsonMetaData = CkJsonObjectW_Create();
    CkJsonObjectW_UpdateString(jsonMetaData,L"contentType",L"image/jpeg");

    // Adds the "Authorization: Bearer <access_token>" header..
    CkHttpW_putAuthToken(http,CkJsonObjectW_stringOf(jsonToken,L"access_token"));

    CkHttpW_SetUrlVar(http,L"bucket_name",L"chilkat-bucket-b");
    CkHttpW_SetUrlVar(http,L"object_name",L"penguins2.jpg");
    url = L"https://storage.googleapis.com/upload/storage/v1/b/{$bucket_name}/o?uploadType=resumable&name={$object_name}";
    resp = CkHttpW_PText(http,L"POST",url,CkJsonObjectW_emit(jsonMetaData),L"utf-8",L"application/json",FALSE,FALSE);
    if (CkHttpW_getLastMethodSuccess(http) == FALSE) {
        wprintf(L"%s\n",CkHttpW_lastErrorText(http));
        CkHttpW_Dispose(http);
        CkJsonObjectW_Dispose(jsonToken);
        CkJsonObjectW_Dispose(jsonMetaData);
        return;
    }

    statusCode = CkHttpResponseW_getStatusCode(resp);
    wprintf(L"response status code = %d\n",statusCode);

    sessionUrl = L"";

    if (statusCode != 200) {
        wprintf(L"%s\n",CkHttpResponseW_bodyStr(resp));
    }
    else {
        // The session URL will be used to upload the file in chunks, in subsequent HTTP POSTs...
        sessionUrl = CkHttpResponseW_getHeaderField(resp,L"Location");
        wprintf(L"Session URL = %s\n",sessionUrl);
    }

    CkHttpResponseW_Dispose(resp);


    CkHttpW_Dispose(http);
    CkJsonObjectW_Dispose(jsonToken);
    CkJsonObjectW_Dispose(jsonMetaData);

    }