C#

S3 Get Bucket Objects with CommonPrefixes

See more Amazon S3 Examples

Demonstrates how to get a list of bucket objects using the prefix and delimiter query params to get an XML result with CommonPrefixes. C#

bool success = false;

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

Chilkat.Http http = new Chilkat.Http();

//  Insert your access key here:
http.AwsAccessKey = "AWS_ACCESS_KEY";

//  Insert your secret key here:
http.AwsSecretKey = "AWS_SECRET_KEY";

//  In this example, my bucket is "chilkat100".
//  It contains a number of folders, one of which is named "images".
//  I want to get a list of all sub-folders under the "images" folder
string strXml = http.S3_ListBucketObjects("chilkat100?prefix=images/&delimiter=/");
if (http.LastMethodSuccess != true) {
    Debug.WriteLine(http.LastErrorText);
    return;
}

Debug.WriteLine("Response status code = " + Convert.ToString(http.LastStatus));

Chilkat.Xml xml = new Chilkat.Xml();
success = xml.LoadXml(strXml);
if (success != true) {
    Debug.WriteLine(xml.LastErrorText);
    return;
}

//  If the response status code was not 200, then the XML response is not a 
//  listing of objects, but instead contains error information.
if (http.LastStatus != 200) {
    Debug.WriteLine(xml.GetXml());
    Debug.WriteLine("Failed.");
    return;
}

//  A sample response is shown below.
Debug.WriteLine(xml.GetXml());
Debug.WriteLine("----");

//  Here is the list of sub-folders (i.e. CommonPrefixes)

//  <?xml version="1.0" encoding="UTF-8"?>
//  <ListBucketResult xmlns="http://s3.amazonaws.com/doc/2006-03-01/">
//      <Name>chilkat100</Name>
//      <Prefix>images/</Prefix>
//      <Marker/>
//      <MaxKeys>1000</MaxKeys>
//      <Delimiter>/</Delimiter>
//      <IsTruncated>false</IsTruncated>
//      <CommonPrefixes>
//          <Prefix>images/africa/</Prefix>
//      </CommonPrefixes>
//      <CommonPrefixes>
//          <Prefix>images/sea_creatures/</Prefix>
//      </CommonPrefixes>
//  </ListBucketResult>

string Prefix;

//  The XML can be parsed like this:
int i = 0;
int count_i = xml.NumChildrenHavingTag("CommonPrefixes");
while (i < count_i) {
    xml.I = i;
    Prefix = xml.GetChildContent("CommonPrefixes[i]|Prefix");
    Debug.WriteLine("Prefix = " + Prefix);
    i = i + 1;
}