(MFC) Google Cloud Storage List Buckets

Demonstrates how to retrieve a list of buckets for a given project.

Chilkat C/C++ Library Downloads MS Visual C/C++ Libs

See Also: Using MFC CString in Chilkat

#include <CkStringBuilder.h>
#include <CkHttp.h>
#include <CkHttpResponse.h>
#include <CkJsonObject.h>

void ChilkatSample(void)
    {
    CkString strOut;

    // 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");

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

    // For more info see Cloud Storage Documentation - Buckets: list 
    // 
    bool success = http.SetUrlVar("PROJECT_NAME","ChilkatCloud");
    CkHttpResponse *resp = http.QuickGetObj("https://www.googleapis.com/storage/v1/b?project={$PROJECT_NAME}");
    if (http.get_LastMethodSuccess() == false) {
        strOut.append(http.lastErrorText());
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    int responseCode = resp->get_StatusCode();
    if (responseCode == 401) {
        strOut.append(resp->bodyStr());
        strOut.append("\r\n");
        strOut.append("If invalid credentials, then it is likely the access token expired.");
        strOut.append("\r\n");
        strOut.append("Your app should automatically fetch a new access token and re-try.");
        strOut.append("\r\n");
        delete resp;
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    strOut.append("Response code: ");
    strOut.appendInt(responseCode);
    strOut.append("\r\n");
    strOut.append("Response body");
    strOut.append("\r\n");

    CkJsonObject json;
    success = json.Load(resp->bodyStr());
    delete resp;

    json.put_EmitCompact(false);

    strOut.append(json.emit());
    strOut.append("\r\n");

    // A response code = 200 indicates success, and the response body contains JSON such as this:

    // {
    //   "kind": "storage#buckets",
    //   "items": [
    //     {
    //       "kind": "storage#bucket",
    //       "id": "chilkat-bucket",
    //       "selfLink": "https://www.googleapis.com/storage/v1/b/chilkat-bucket",
    //       "projectNumber": "5332332985",
    //       "name": "chilkat-bucket",
    //       "timeCreated": "2018-10-23T00:04:44.507Z",
    //       "updated": "2018-10-23T00:04:44.507Z",
    //       "metageneration": "1",
    //       "iamConfiguration": {
    //         "bucketPolicyOnly": {
    //           "enabled": false
    //         }
    //       },
    //       "location": "US",
    //       "storageClass": "MULTI_REGIONAL",
    //       "etag": "CAE="
    //     },
    //     {
    //       "kind": "storage#bucket",
    //       "id": "chilkat-images",
    //       "selfLink": "https://www.googleapis.com/storage/v1/b/chilkat-images",
    //       "projectNumber": "5332332985",
    //       "name": "chilkat-images",
    //       "timeCreated": "2018-10-23T11:24:43.000Z",
    //       "updated": "2018-10-23T11:24:43.000Z",
    //       "metageneration": "1",
    //       "iamConfiguration": {
    //         "bucketPolicyOnly": {
    //           "enabled": false
    //         }
    //       },
    //       "location": "US",
    //       "storageClass": "MULTI_REGIONAL",
    //       "etag": "CAE="
    //     }
    //   ]
    // }

    // Use this online tool to generate parsing code from sample JSON: 
    // Generate Parsing Code from JSON

    const char *kind = 0;
    int i;
    int count_i;
    const char *id = 0;
    const char *selfLink = 0;
    const char *projectNumber = 0;
    const char *name = 0;
    const char *timeCreated = 0;
    const char *updated = 0;
    const char *metageneration = 0;
    bool iamConfigurationBucketPolicyOnlyEnabled;
    const char *location = 0;
    const char *storageClass = 0;
    const char *etag = 0;

    kind = json.stringOf("kind");
    i = 0;
    count_i = json.SizeOfArray("items");
    while (i < count_i) {
        json.put_I(i);
        kind = json.stringOf("items[i].kind");
        id = json.stringOf("items[i].id");
        selfLink = json.stringOf("items[i].selfLink");
        projectNumber = json.stringOf("items[i].projectNumber");
        name = json.stringOf("items[i].name");
        timeCreated = json.stringOf("items[i].timeCreated");
        updated = json.stringOf("items[i].updated");
        metageneration = json.stringOf("items[i].metageneration");
        iamConfigurationBucketPolicyOnlyEnabled = json.BoolOf("items[i].iamConfiguration.bucketPolicyOnly.enabled");
        location = json.stringOf("items[i].location");
        storageClass = json.stringOf("items[i].storageClass");
        etag = json.stringOf("items[i].etag");
        i = i + 1;
    }



    SetDlgItemText(IDC_EDIT1,strOut.getUnicode());

    }