(Unicode C) Glacier Download Archive

Demonstrates how to download an Amazon Glacier archive. Downloading a Glacier archive is a two step process. First an archive retrieval job is initiated. After it completes, the job output is downloaded (i.e. the archive contents are downloaded.)

Note: This example requires Chilkat v9.5.0.78 or greater.

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#include <C_CkRestW.h>
#include <C_CkAuthAwsW.h>
#include <C_CkStreamW.h>

void ChilkatSample(void)
    {
    HCkRestW rest;
    BOOL bTls;
    int port;
    BOOL bAutoReconnect;
    BOOL success;
    HCkAuthAwsW authAws;
    int responseStatusCode;
    HCkStreamW bodyStream;
    const wchar_t *jsonError;

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

    rest = CkRestW_Create();

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

    // Provide AWS credentials.
    authAws = CkAuthAwsW_Create();
    CkAuthAwsW_putAccessKey(authAws,L"AWS_ACCESS_KEY");
    CkAuthAwsW_putSecretKey(authAws,L"AWS_SECRET_KEY");
    CkAuthAwsW_putServiceName(authAws,L"glacier");
    CkAuthAwsW_putRegion(authAws,L"us-west-2");

    success = CkRestW_SetAuthAws(rest,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 Retrieve Job Output Reference Documentation
    // 
    CkRestW_AddHeader(rest,L"x-amz-glacier-version",L"2012-06-01");

    // To download an archive, we'll make several method calls:
    // 1) Send the HTTPS GET request.
    // 2) Get the response body.
    // 3) If the response status code indicates success, stream the response body (i.e the archive data) to a file.
    // 4) If the response status code indicates an error, get the JSON error response.

    // Send the GET request.
    success = CkRestW_SendReqNoBody(rest,L"GET",L"/AWS_ACCOUNT_ID/vaults/chilkat/jobs/JOB_ID/output");
    if (success != TRUE) {
        wprintf(L"%s\n",CkRestW_lastErrorText(rest));
        CkRestW_Dispose(rest);
        CkAuthAwsW_Dispose(authAws);
        return;
    }

    // Read the response header.
    responseStatusCode = CkRestW_ReadResponseHeader(rest);
    if (responseStatusCode < 0) {
        wprintf(L"%s\n",CkRestW_lastErrorText(rest));
        CkRestW_Dispose(rest);
        CkAuthAwsW_Dispose(authAws);
        return;
    }

    wprintf(L"Response status code = %d\n",responseStatusCode);

    // We expect a 200 response status if the archive data is coming.
    // Otherwise, we'll get a JSON response body with an error message(or no response body).
    if (responseStatusCode == 200) {

        bodyStream = CkStreamW_Create();

        // The stream's sink will be a file.
        CkStreamW_putSinkFile(bodyStream,L"qa_output/archiveData.dat");

        // Read the response body to the stream.
        success = CkRestW_ReadRespBodyStream(rest,bodyStream,TRUE);
        if (success != TRUE) {
            wprintf(L"%s\n",CkRestW_lastErrorText(rest));
            CkRestW_Dispose(rest);
            CkAuthAwsW_Dispose(authAws);
            CkStreamW_Dispose(bodyStream);
            return;
        }

        wprintf(L"Successfully received the archive file.\n");

    }
    else {
        jsonError = CkRestW_readRespBodyString(rest);
        if (CkRestW_getLastMethodSuccess(rest) != TRUE) {
            wprintf(L"%s\n",CkRestW_lastErrorText(rest));
        }
        else {
            wprintf(L"%s\n",jsonError);
        }

    }



    CkRestW_Dispose(rest);
    CkAuthAwsW_Dispose(authAws);
    CkStreamW_Dispose(bodyStream);

    }