/// <summary>Builds a Content-Type given the mime type and all the parameters.</summary>
/// <param name="mimeType">The MIME type in standard type/subtype form, without parameters.</param>
/// <param name="parameters">Parameters to be appended in the mime type.</param>
/// <returns>content type containing the mime type and all the parameters.</returns>
internal static string WriteContentType(string mimeType, MediaParameter[] parameters)
{
Debug.Assert(!string.IsNullOrEmpty(mimeType), "!string.IsNullOrEmpty(mimeType)");
Debug.Assert(parameters != null, "parameters != null");
StringBuilder stringBuilder = new StringBuilder();
stringBuilder.Append(mimeType);
foreach (var parameter in parameters)
{
stringBuilder.Append(';');
stringBuilder.Append(parameter.Name);
stringBuilder.Append("=");
stringBuilder.Append(parameter.GetOriginalValue());
}
return stringBuilder.ToString();
}
/// <summary>Read a parameter for a media type/range.</summary>
/// <param name="text">Text to read from.</param>
/// <param name="textIndex">Pointer in text.</param>
/// <param name="parameters">Array with parameters to grow as necessary.</param>
private static void ReadMediaTypeParameter(string text, ref int textIndex, ref MediaParameter[] parameters)
{
int startIndex = textIndex;
if (ReadToken(text, ref textIndex))
{
throw Error.HttpHeaderFailure(400, Strings.HttpProcessUtility_MediaTypeMissingValue);
}
string parameterName = text.Substring(startIndex, textIndex - startIndex);
if (text[textIndex] != '=')
{
throw Error.HttpHeaderFailure(400, Strings.HttpProcessUtility_MediaTypeMissingValue);
}
textIndex++;
MediaParameter parameter = ReadQuotedParameterValue(parameterName, text, ref textIndex);
// Add the parameter name/value pair to the list.
if (parameters == null)
{
parameters = new MediaParameter[1];
}
else
{
var grow = new MediaParameter[parameters.Length + 1];
Array.Copy(parameters, grow, parameters.Length);
parameters = grow;
}
parameters[parameters.Length - 1] = parameter;
}
/// <summary>
/// Initializes a new <see cref="MediaType"/> read-only instance.
/// </summary>
/// <param name="type">Type specification (for example, 'text').</param>
/// <param name="subType">Sub-type specification (for example, 'plain').</param>
/// <param name="parameters">Parameters specified on the media type.</param>
internal MediaType(string type, string subType, MediaParameter[] parameters)
{
Debug.Assert(type != null, "type != null");
Debug.Assert(subType != null, "subType != null");
this.type = type;
this.subType = subType;
this.parameters = parameters;
}
