// Reads the accept header and selects the most appropriate supported content-type
// TODO: Consider separating out the accept header parsing into a stand-alone library.
// e.g. System.Net.Http.Headers.HttpRequestHeaders.Accept.TryParseAdd.
public bool TryDetermineFormatter(IDictionary <string, object> environment, out IDirectoryInfoFormatter formatter)
{
if (environment == null)
{
throw new ArgumentNullException("environment");
}
// TODO:
// Parse the Accept header
var requestHeaders = (IDictionary <string, string[]>)environment[Constants.RequestHeadersKey];
string[] acceptHeaders;
if (!requestHeaders.TryGetValue(Constants.Accept, out acceptHeaders) ||
acceptHeaders == null || acceptHeaders.Length == 0)
{
// RFC 2616 section 14.1: If no Accept header is present, then it is assumed that the client accepts all media types.
// Send our fanciest version.
formatter = DefaultFormatter;
return(true);
}
string acceptHeader = acceptHeaders[0] ?? string.Empty;
if (acceptHeaders.Length > 1)
{
acceptHeader = string.Join(", ", acceptHeaders);
}
// TODO: Split by ",", trim, split by ";", trim, sort by q value and our priorities
// acceptHeaders = acceptHeader.Split(",");
// Check for supported types:
// text/plain
// text/html
// application/json
// text/xml or application/xml?
// */*?
// text/*?
for (int i = 0; i < Formatters.Count; i++)
{
if (acceptHeader.Contains(Formatters[i].ContentType))
{
formatter = Formatters[i];
return(true);
}
}
if (acceptHeader.Contains(Constants.AnyType))
{
formatter = DefaultFormatter;
return(true);
}
formatter = null;
return(false);
}
// Reads the accept header and selects the most appropriate supported content-type
// TODO: Consider separating out the accept header parsing into a stand-alone library.
// e.g. System.Net.Http.Headers.HttpRequestHeaders.Accept.TryParseAdd.
public bool TryDetermineFormatter(IDictionary<string, object> environment, out IDirectoryInfoFormatter formatter)
{
if (environment == null)
{
throw new ArgumentNullException("environment");
}
// TODO:
// Parse the Accept header
var requestHeaders = (IDictionary<string, string[]>)environment[Constants.RequestHeadersKey];
string[] acceptHeaders;
if (!requestHeaders.TryGetValue(Constants.Accept, out acceptHeaders)
|| acceptHeaders == null || acceptHeaders.Length == 0)
{
// RFC 2616 section 14.1: If no Accept header is present, then it is assumed that the client accepts all media types.
// Send our fanciest version.
formatter = DefaultFormatter;
return true;
}
string acceptHeader = acceptHeaders[0] ?? string.Empty;
if (acceptHeaders.Length > 1)
{
acceptHeader = string.Join(", ", acceptHeaders);
}
// TODO: Split by ",", trim, split by ";", trim, sort by q value and our priorities
// acceptHeaders = acceptHeader.Split(",");
// Check for supported types:
// text/plain
// text/html
// application/json
// text/xml or application/xml?
// */*?
// text/*?
for (int i = 0; i < Formatters.Count; i++)
{
if (acceptHeader.Contains(Formatters[i].ContentType))
{
formatter = Formatters[i];
return true;
}
}
if (acceptHeader.Contains(Constants.AnyType))
{
formatter = DefaultFormatter;
return true;
}
formatter = null;
return false;
}
internal AcceptHeaderDirectoryFormatSelector()
{
// Prioritized list
Formatters = new IDirectoryInfoFormatter[]
{
new HtmlDirectoryFormatter(),
new JsonDirectoryFormatter(),
new PlainTextDirectoryFormatter(),
};
DefaultFormatter = Formatters[0];
}
internal AcceptHeaderDirectoryFormatSelector()
{
// Prioritized list
Formatters = new IDirectoryInfoFormatter[]
{
new HtmlDirectoryFormatter(),
new JsonDirectoryFormatter(),
new PlainTextDirectoryFormatter(),
};
DefaultFormatter = Formatters[0];
}
