/// <summary>
/// Calculate the MD5 of the message attributes
/// </summary>
/// <param name="attributes"></param>
/// <returns></returns>
public static string CalculateMD5(Dictionary <string, MessageAttributeValue> attributes)
{
List <KeyValuePair <string, MessageAttributeValue> > orderedAttributes = new List <KeyValuePair <string, MessageAttributeValue> >();
foreach (var kvp in attributes)
{
orderedAttributes.Add(kvp);
}
orderedAttributes.Sort(delegate(KeyValuePair <string, MessageAttributeValue> kvp1, KeyValuePair <string, MessageAttributeValue> kvp2)
{
return(string.CompareOrdinal(kvp1.Key, kvp2.Key));
});
var ms = new MemoryStream();
using (var writer = new SQSWriter(ms))
{
foreach (var kvp in orderedAttributes)
{
var name = kvp.Key;
var value = kvp.Value;
writer.Write(name);
writer.Write(value.DataType);
if (value.StringValue != null)
{
writer.Write(STRING_TYPE);
writer.Write(value.StringValue);
}
else if (value.BinaryValue != null)
{
writer.Write(BINARY_TYPE);
writer.Write(value.BinaryValue);
}
else if (value.StringListValues != null)
{
writer.Write(STRING_LIST_TYPE);
foreach (var item in value.StringListValues)
{
writer.Write(item);
}
}
else if (value.BinaryListValues != null)
{
writer.Write(BINARY_LIST_TYPE);
foreach (var item in value.BinaryListValues)
{
writer.Write(item);
}
}
}
}
var bytes = ms.ToArray();
return(CalculateMD5(bytes));
}
/// <summary>
/// Calculate the MD5 of the message attributes
/// </summary>
/// <param name="attributes"></param>
/// <returns></returns>
public static string CalculateMD5(Dictionary <string, MessageAttributeValue> attributes)
{
var sorted = attributes.OrderBy(kvp => kvp.Key, StringComparer.Ordinal);
var ms = new MemoryStream();
using (var writer = new SQSWriter(ms))
{
foreach (var kvp in sorted)
{
var name = kvp.Key;
var value = kvp.Value;
writer.Write(name);
writer.Write(value.DataType);
if (value.StringValue != null)
{
writer.Write(STRING_TYPE);
writer.Write(value.StringValue);
}
else if (value.BinaryValue != null)
{
writer.Write(BINARY_TYPE);
writer.Write(value.BinaryValue);
}
else if (value.StringListValues != null)
{
writer.Write(STRING_LIST_TYPE);
foreach (var item in value.StringListValues)
{
writer.Write(item);
}
}
else if (value.BinaryListValues != null)
{
writer.Write(BINARY_LIST_TYPE);
foreach (var item in value.BinaryListValues)
{
writer.Write(item);
}
}
}
}
var bytes = ms.ToArray();
return(CalculateMD5(bytes));
}
private static string CalculateMD5(Dictionary<string, MessageAttributeValue> attributes)
{
var sorted = attributes.OrderBy(kvp => kvp.Key, StringComparer.OrdinalIgnoreCase);
var ms = new MemoryStream();
using (var writer = new SQSWriter(ms))
{
foreach (var kvp in sorted)
{
var name = kvp.Key;
var value = kvp.Value;
writer.Write(name);
writer.Write(value.DataType);
if (value.StringValue != null)
{
writer.Write(STRING_TYPE);
writer.Write(value.StringValue);
}
else if (value.BinaryValue != null)
{
writer.Write(BINARY_TYPE);
writer.Write(value.BinaryValue);
}
else if (value.StringListValues != null)
{
writer.Write(STRING_LIST_TYPE);
foreach (var item in value.StringListValues)
{
writer.Write(item);
}
}
else if (value.BinaryListValues != null)
{
writer.Write(BINARY_LIST_TYPE);
foreach (var item in value.BinaryListValues)
{
writer.Write(item);
}
}
}
}
var bytes = ms.ToArray();
return CalculateMD5(bytes);
}