(C) S3 Upload String using AWS Signature Version 2

Example to upload the contents of a string to the Amazon S3 service, using the older AWS Signature Version 2.

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#include <C_CkRest.h>
#include <C_CkAuthAws.h>
#include <C_CkFileAccess.h>

void ChilkatSample(void)
    {
    HCkRest rest;
    BOOL bTls;
    int port;
    BOOL bAutoReconnect;
    BOOL success;
    HCkAuthAws authAws;
    HCkFileAccess fac;
    const char *fileContents;
    const char *responseBodyStr;
    int statusCode;

    // Demonstrates how to use older AWS S3 Signature Version 2 for uploading the contents
    // of a string variable to an object in a bucket.

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

    rest = CkRest_Create();

    // Connect to the Amazon AWS REST server.
    bTls = TRUE;
    port = 443;
    bAutoReconnect = TRUE;
    // The file is uploaded to the bucket named "chilkat100", which becomes part of the domain:
    success = CkRest_Connect(rest,"chilkat100.s3.amazonaws.com",port,bTls,bAutoReconnect);

    // ----------------------------------------------------------------------------
    // Important: For buckets created in regions outside us-east-1,
    // there are three important changes that need to be made.
    // See Working with S3 Buckets in Non-us-east-1 Regions for the details.
    // ----------------------------------------------------------------------------

    // Provide AWS credentials for the REST call.
    authAws = CkAuthAws_Create();
    CkAuthAws_putAccessKey(authAws,"AWS_ACCESS_KEY");
    CkAuthAws_putSecretKey(authAws,"AWS_SECRET_KEY");
    CkAuthAws_putServiceName(authAws,"s3");

    // For AWS Signature Version 2, the following two properties need to be set:
    CkAuthAws_putSignatureVersion(authAws,2);
    // See http://docs.aws.amazon.com/AmazonS3/latest/dev/RESTAuthentication.html#ConstructingTheCanonicalizedResourceElement
    // The bucket is "chilkat100", and the uriPath is "/hamlet_play.xml", which must match
    // the URI path passed to the FullRequestString method below.
    CkAuthAws_putCanonicalizedResourceV2(authAws,"/chilkat100/hamlet_play.xml");

    success = CkRest_SetAuthAws(rest,authAws);

    // Load a text file into memory.
    fac = CkFileAccess_Create();
    fileContents = CkFileAccess_readEntireTextFile(fac,"qa_data/xml/hamlet.xml","utf-8");
    if (CkFileAccess_getLastMethodSuccess(fac) != TRUE) {
        printf("%s\n",CkFileAccess_lastErrorText(fac));
        CkRest_Dispose(rest);
        CkAuthAws_Dispose(authAws);
        CkFileAccess_Dispose(fac);
        return;
    }

    // To send the file in gzip or deflate compressed format, set the Content-Encoding request
    // header to "gzip" or "deflate".  (this is optional)
    success = CkRest_AddHeader(rest,"Content-Encoding","gzip");

    // Indicate the Content-Type of our upload.  (This is optional)
    success = CkRest_AddHeader(rest,"Content-Type","text/xml");

    // We can add an "Expect: 100-continue" header so that if the request is rejected
    // by the server immediately after receiving the request header, it can respond
    // and the client (Chilkat) can avoid sending the file data.
    // (this is optional)
    success = CkRest_AddHeader(rest,"Expect","100-continue");

    // Upload the file to Amazon S3.
    responseBodyStr = CkRest_fullRequestString(rest,"PUT","/hamlet_play.xml",fileContents);
    if (CkRest_getLastMethodSuccess(rest) != TRUE) {
        printf("%s\n",CkRest_lastErrorText(rest));
        CkRest_Dispose(rest);
        CkAuthAws_Dispose(authAws);
        CkFileAccess_Dispose(fac);
        return;
    }

    // Did we get a 200 response indicating success?
    statusCode = CkRest_getResponseStatusCode(rest);
    if (statusCode != 200) {
        printf("Error response: %s\n",responseBodyStr);
        printf("Status code: %d, Status text: %s\n",statusCode,CkRest_responseStatusText(rest));
        CkRest_Dispose(rest);
        CkAuthAws_Dispose(authAws);
        CkFileAccess_Dispose(fac);
        return;
    }

    printf("File successfully uploaded.\n");


    CkRest_Dispose(rest);
    CkAuthAws_Dispose(authAws);
    CkFileAccess_Dispose(fac);

    }