public MetadataParserResult ParseSingleItem(string metadataItem, ICollection <string> existingKeys)
{
var pairParts = metadataItem.TrimEnd(' ').Split(new[] { ' ' });
if (pairParts.Length < 1 || pairParts.Length > 2)
{
return(MetadataParserResult.FromError($"Header {HeaderConstants.UploadMetadata}: The Upload-Metadata request and response header MUST consist of one or more comma - separated key - value pairs. The key and value MUST be separated by a space.The key MUST NOT contain spaces and commas and MUST NOT be empty. The key SHOULD be ASCII encoded and the value MUST be Base64 encoded. All keys MUST be unique. The value MAY be empty. In these cases, the space, which would normally separate the key and the value, MAY be left out."));
}
var key = pairParts[0];
if (string.IsNullOrEmpty(key))
{
return(MetadataParserResult.FromError($"Header {HeaderConstants.UploadMetadata}: Key must not be empty"));
}
if (existingKeys.Contains(key))
{
return(MetadataParserResult.FromError($"Header {HeaderConstants.UploadMetadata}: Duplicate keys are not allowed"));
}
try
{
return(MetadataParserResult.FromResult(key, GetMetadataValue(pairParts)));
}
catch (FormatException)
{
return(MetadataParserResult.FromError($"Header {HeaderConstants.UploadMetadata}: Value for {key} is not properly encoded using base64"));
}
}
public MetadataParserResult GetResultForEmptyHeader()
{
return(MetadataParserResult.FromError($"Header {HeaderConstants.UploadMetadata} must consist of one or more comma-separated key-value pairs"));
}
