C

S3 List Bucket Objects (using Chilkat REST)

See more Amazon S3 (new) Examples

Demonstrates how to fetch a list of objects in an S3 bucket. C

#include <C_CkRest.h>
#include <C_CkAuthAws.h>
#include <C_CkStringBuilder.h>
#include <C_CkXml.h>

void ChilkatSample(void)
    {
    BOOL success;
    HCkRest rest;
    BOOL bTls;
    int port;
    BOOL bAutoReconnect;
    HCkAuthAws authAws;
    HCkStringBuilder sbResponse;
    int statusCode;
    HCkXml xml;
    const char *Key;
    const char *LastModified;
    const char *ETag;
    const char *SizeDecimalStr;
    const char *ID;
    const char *DisplayName;
    const char *StorageClass;
    const char *Name;
    int MaxKeys;
    const char *IsTruncated;
    int i;
    int count_i;

    success = FALSE;

    // 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;
    success = CkRest_Connect(rest,"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");
    success = CkRest_SetAuthAws(rest,authAws);

    //  Set the bucket name via the HOST header.
    //  In this case, the bucket name is "chilkat100".
    CkRest_putHost(rest,"chilkat100.s3.amazonaws.com");

    sbResponse = CkStringBuilder_Create();
    success = CkRest_FullRequestNoBodySb(rest,"GET","/",sbResponse);
    if (success == FALSE) {
        printf("%s\n",CkRest_lastErrorText(rest));
        CkRest_Dispose(rest);
        CkAuthAws_Dispose(authAws);
        CkStringBuilder_Dispose(sbResponse);
        return;
    }

    statusCode = CkRest_getResponseStatusCode(rest);
    printf("Response status code = %d\n",statusCode);

    xml = CkXml_Create();
    CkXml_LoadSb(xml,sbResponse,TRUE);
    printf("%s\n",CkXml_getXml(xml));

    if (statusCode != 200) {
        printf("Failed.  See error information in the XML.\n");
        CkRest_Dispose(rest);
        CkAuthAws_Dispose(authAws);
        CkStringBuilder_Dispose(sbResponse);
        CkXml_Dispose(xml);
        return;
    }

    // Use this online tool to generate code from sample XML: 
    // Generate Code to Create XML

    Name = CkXml_getChildContent(xml,"Name");
    MaxKeys = CkXml_GetChildIntValue(xml,"MaxKeys");
    IsTruncated = CkXml_getChildContent(xml,"IsTruncated");
    i = 0;
    count_i = CkXml_NumChildrenHavingTag(xml,"Contents");
    while (i < count_i) {
        CkXml_putI(xml,i);
        Key = CkXml_getChildContent(xml,"Contents[i]|Key");
        LastModified = CkXml_getChildContent(xml,"Contents[i]|LastModified");
        ETag = CkXml_getChildContent(xml,"Contents[i]|ETag");
        SizeDecimalStr = CkXml_getChildContent(xml,"Contents[i]|Size");
        ID = CkXml_getChildContent(xml,"Contents[i]|Owner|ID");
        DisplayName = CkXml_getChildContent(xml,"Contents[i]|Owner|DisplayName");
        StorageClass = CkXml_getChildContent(xml,"Contents[i]|StorageClass");
        i = i + 1;
    }



    CkRest_Dispose(rest);
    CkAuthAws_Dispose(authAws);
    CkStringBuilder_Dispose(sbResponse);
    CkXml_Dispose(xml);

    }