(Unicode C++) Amazon Glacier Get Vault Access Policy

Demonstrates how to retrieve the access-policy subresource set on the vault

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#include <CkRestW.h>
#include <CkAuthAwsW.h>
#include <CkStringBuilderW.h>
#include <CkJsonObjectW.h>

void ChilkatSample(void)
    {
    // This example requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    CkRestW rest;

    // Connect to the Amazon AWS REST server in the desired region.
    bool bTls = true;
    int port = 443;
    bool bAutoReconnect = true;
    bool success = rest.Connect(L"glacier.us-west-2.amazonaws.com",port,bTls,bAutoReconnect);

    // Provide AWS credentials.
    CkAuthAwsW authAws;
    authAws.put_AccessKey(L"AWS_ACCESS_KEY");
    authAws.put_SecretKey(L"AWS_SECRET_KEY");
    authAws.put_ServiceName(L"glacier");
    authAws.put_Region(L"us-west-2");

    success = rest.SetAuthAws(authAws);

    // --------------------------------------------------------------------------
    // Note: The above REST connection and setup of the AWS credentials
    // can be done once.  After connecting, any number of REST calls can be made.
    // The "auto reconnect" property passed to rest.Connect indicates that if
    // the connection is lost, a REST method call will automatically reconnect
    // if needed.
    // --------------------------------------------------------------------------

    // 
    // For more information, see Glacier Get Vault Access Policy Reference Documentation
    // 
    rest.AddHeader(L"x-amz-glacier-version",L"2012-06-01");

    // Get the access policy for the "chilkat" vault.
    CkStringBuilderW sbResponseBody;
    success = rest.FullRequestNoBodySb(L"GET",L"/AWS_ACCOUNT_ID/vaults/chilkat/access-policy",sbResponseBody);
    if (success != true) {
        wprintf(L"%s\n",rest.lastErrorText());
        return;
    }

    int respStatusCode = rest.get_ResponseStatusCode();
    if (respStatusCode >= 400) {
        wprintf(L"Response Status Code = %d\n",respStatusCode);
        wprintf(L"Response Header:\n");
        wprintf(L"%s\n",rest.responseHeader());
        wprintf(L"Response Body:\n");
        wprintf(L"%s\n",sbResponseBody.getAsString());
        return;
    }

    // Success is indicated by a 200 response status.
    wprintf(L"response status code = %d\n",respStatusCode);

    CkJsonObjectW json;
    json.LoadSb(sbResponseBody);
    json.put_EmitCompact(false);

    // Returns JSON such as this:
    // {
    //   "Policy": "{\"Version\":\"2012-10-17\",\"Statement\":[{\"Sid\":\"Define-owner-access-rights\",\"Effect\":\"Allow\",\"Principal\":{\"AWS\":\"arn:aws:iam::9999999999999:root\"},\"Action\":\"glacier:DeleteArchive\",\"Resource\":\"arn:aws:glacier:us-west-2:9999999999999:vaults/chilkat\"}]}"
    // }

    // Unwrap...
    CkJsonObjectW jsonPolicy;
    jsonPolicy.Load(json.stringOf(L"Policy"));
    jsonPolicy.put_EmitCompact(false);

    wprintf(L"%s\n",jsonPolicy.emit());
    wprintf(L"----\n");

    // The jsonPolicy contains:

    // {
    //   "Version": "2012-10-17",
    //   "Statement": [
    //     {
    //       "Sid": "Define-owner-access-rights",
    //       "Effect": "Allow",
    //       "Principal": {
    //         "AWS": "arn:aws:iam::9999999999999:root"
    //       },
    //       "Action": "glacier:DeleteArchive",
    //       "Resource": "arn:aws:glacier:us-west-2:9999999999999:vaults/chilkat"
    //     }
    //   ]
    // }
    // 

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

    // To parse the above contents of jsonPolicy...
    const wchar_t *Version = 0;
    int i;
    int count_i;
    const wchar_t *Sid = 0;
    const wchar_t *Effect = 0;
    const wchar_t *PrincipalAWS = 0;
    const wchar_t *Action = 0;
    const wchar_t *Resource = 0;

    Version = jsonPolicy.stringOf(L"Version");
    i = 0;
    count_i = jsonPolicy.SizeOfArray(L"Statement");
    while (i < count_i) {
        jsonPolicy.put_I(i);
        Sid = jsonPolicy.stringOf(L"Statement[i].Sid");
        Effect = jsonPolicy.stringOf(L"Statement[i].Effect");
        PrincipalAWS = jsonPolicy.stringOf(L"Statement[i].Principal.AWS");
        Action = jsonPolicy.stringOf(L"Statement[i].Action");
        Resource = jsonPolicy.stringOf(L"Statement[i].Resource");
        i = i + 1;
    }
    }