C++
Upload String to Google Cloud Storage

Demonstrates how to upload an in-memory string to Google Cloud Storage.
Chilkat C++ Downloads

C++
#include <CkStringBuilder.h>
#include <CkHttp.h>
#include <CkXml.h>
#include <CkHttpResponse.h>

void ChilkatSample(void)
    {
    bool success = false;

    //  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..
    CkStringBuilder sbToken;
    sbToken.LoadFile("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]"

    CkHttp http;
    http.put_AuthToken(sbToken.getAsString());

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

    //  Write the XML to sbXml.
    CkStringBuilder sbXml;
    xml.GetXmlSb(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.
    http.SetUrlVar("bucket_name","chilkat-ocean");
    http.SetUrlVar("object_name","test.xml");
    const char *url = "https://www.googleapis.com/upload/storage/v1/b/{$bucket_name}/o?uploadType=media&name={$object_name}";

    CkHttpResponse resp;
    success = http.HttpSb("POST",url,sbXml,"utf-8","application/xml",resp);
    if (success == 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";
        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/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="
    //  }
    }