(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_CkStringBuilder.h>
#include <C_CkHttp.h>
#include <C_CkXml.h>
#include <C_CkHttpResponse.h>

void ChilkatSample(void)
    {
    HCkStringBuilder sbToken;
    HCkHttp http;
    HCkXml xml;
    HCkStringBuilder sbXml;
    const char *url;
    HCkHttpResponse 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 = CkStringBuilder_Create();
    CkStringBuilder_LoadFile(sbToken,"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]"

    http = CkHttp_Create();
    CkHttp_putAuthToken(http,CkStringBuilder_getAsString(sbToken));

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

    // Write the XML to sbXml.
    sbXml = CkStringBuilder_Create();
    CkXml_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.
    CkHttp_SetUrlVar(http,"bucket_name","chilkat-ocean");
    CkHttp_SetUrlVar(http,"object_name","test.xml");
    url = "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 = CkHttp_PTextSb(http,"POST",url,sbXml,"utf-8","application/xml",FALSE,FALSE);
    if (CkHttp_getLastMethodSuccess(http) == FALSE) {
        printf("%s\n",CkHttp_lastErrorText(http));
        CkStringBuilder_Dispose(sbToken);
        CkHttp_Dispose(http);
        CkXml_Dispose(xml);
        CkStringBuilder_Dispose(sbXml);
        return;
    }

    responseCode = CkHttpResponse_getStatusCode(resp);
    if (responseCode == 401) {
        printf("%s\n",CkHttpResponse_bodyStr(resp));
        printf("If invalid credentials, then it is likely the access token expired.\n");
        printf("Your app should automatically fetch a new access token and re-try.\n");
        CkHttpResponse_Dispose(resp);
        CkStringBuilder_Dispose(sbToken);
        CkHttp_Dispose(http);
        CkXml_Dispose(xml);
        CkStringBuilder_Dispose(sbXml);
        return;
    }

    printf("Response code: %d\n",responseCode);
    printf("Response body\n");
    printf("%s\n",CkHttpResponse_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="
    // }

    CkHttpResponse_Dispose(resp);


    CkStringBuilder_Dispose(sbToken);
    CkHttp_Dispose(http);
    CkXml_Dispose(xml);
    CkStringBuilder_Dispose(sbXml);

    }