(Unicode C) Upload String to Google Cloud Storage

Demonstrates how to upload an in-memory string to Google Cloud Storage.

Note: This example requires Chilkat v9.5.0.69 or later because it uses the http.PTextSb method.

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#include <C_CkStringBuilderW.h>
#include <C_CkHttpW.h>
#include <C_CkXmlW.h>
#include <C_CkHttpResponseW.h>

void ChilkatSample(void)
    {
    HCkStringBuilderW sbToken;
    HCkHttpW http;
    HCkXmlW xml;
    HCkStringBuilderW sbXml;
    const wchar_t *url;
    HCkHttpResponseW resp;
    int responseCode;

    // 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..
    sbToken = CkStringBuilderW_Create();
    CkStringBuilderW_LoadFile(sbToken,L"qa_data/tokens/googleCloudStorageAccessToken.txt",L"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]"

    http = CkHttpW_Create();
    CkHttpW_putAuthToken(http,CkStringBuilderW_getAsString(sbToken));

    // Create an XML document, and write it to a StringBuilder.
    // We'll be uploading this XML document.
    xml = CkXmlW_Create();
    CkXmlW_putTag(xml,L"note");
    CkXmlW_UpdateChildContent(xml,L"to",L"Tove");
    CkXmlW_UpdateChildContent(xml,L"from",L"Jani");
    CkXmlW_UpdateChildContent(xml,L"heading",L"Reminder");
    CkXmlW_UpdateChildContent(xml,L"body",L"Don't forget me this weekend!");

    // Write the XML to sbXml.
    sbXml = CkStringBuilderW_Create();
    CkXmlW_GetXmlSb(xml,sbXml);

    // sbXml contains this:

    // <note>
    //     <to>Tove</to>
    //     <from>Jani</from>
    //     <heading>Reminder</heading>
    //     <body>Don't forget me this weekend!</body>
    // </note>

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

    // Note: The PTextSb method first appears in Chilkat v9.5.0.69
    resp = CkHttpW_PTextSb(http,L"POST",url,sbXml,L"utf-8",L"application/xml",FALSE,FALSE);
    if (CkHttpW_getLastMethodSuccess(http) == FALSE) {
        wprintf(L"%s\n",CkHttpW_lastErrorText(http));
        CkStringBuilderW_Dispose(sbToken);
        CkHttpW_Dispose(http);
        CkXmlW_Dispose(xml);
        CkStringBuilderW_Dispose(sbXml);
        return;
    }

    responseCode = CkHttpResponseW_getStatusCode(resp);
    if (responseCode == 401) {
        wprintf(L"%s\n",CkHttpResponseW_bodyStr(resp));
        wprintf(L"If invalid credentials, then it is likely the access token expired.\n");
        wprintf(L"Your app should automatically fetch a new access token and re-try.\n");
        CkHttpResponseW_Dispose(resp);
        CkStringBuilderW_Dispose(sbToken);
        CkHttpW_Dispose(http);
        CkXmlW_Dispose(xml);
        CkStringBuilderW_Dispose(sbXml);
        return;
    }

    wprintf(L"Response code: %d\n",responseCode);
    wprintf(L"Response body\n");
    wprintf(L"%s\n",CkHttpResponseW_bodyStr(resp));

    // A successful response looks like this:
    // Response code: 200
    // Response body
    // {
    //  "kind": "storage#object",
    //  "id": "chilkat-ocean/test.xml/1502669565429870",
    //  "selfLink": "https://www.googleapis.com/storage/v1/b/chilkat-ocean/o/test.xml",
    //  "name": "test.xml",
    //  "bucket": "chilkat-ocean",
    //  "generation": "1502669565429870",
    //  "metageneration": "1",
    //  "contentType": "application/xml",
    //  "timeCreated": "2017-08-14T00:12:45.379Z",
    //  "updated": "2017-08-14T00:12:45.379Z",
    //  "storageClass": "MULTI_REGIONAL",
    //  "timeStorageClassUpdated": "2017-08-14T00:12:45.379Z",
    //  "size": "181",
    //  "md5Hash": "TCR0L7TWsw2TzOvfNvgEfA==",
    //  "mediaLink": "https://www.googleapis.com/download/storage/v1/b/chilkat-ocean/o/test.xml?generation=1502669565429870&alt=media",
    //  "crc32c": "ZFd5sA==",
    //  "etag": "CO6Qpq241dUCEAE="
    // }

    CkHttpResponseW_Dispose(resp);


    CkStringBuilderW_Dispose(sbToken);
    CkHttpW_Dispose(http);
    CkXmlW_Dispose(xml);
    CkStringBuilderW_Dispose(sbXml);

    }