/// <summary>
/// Reads the OData-Version header from the <paramref name="message"/> and parses it.
/// If no OData-Version header is found it sets the default version to be used for reading.
/// </summary>
/// <param name="message">The message to get the OData-Version header from.</param>
/// <param name="defaultVersion">The default version to use if the header was not specified.</param>
/// <returns>
/// The <see cref="ODataVersion"/> retrieved from the OData-Version header of the message.
/// The default version if none is specified in the header.
/// </returns>
internal static ODataVersion GetODataVersion(ODataMessage message, ODataVersion defaultVersion)
{
Debug.Assert(message != null, "message != null");
string headerValue = message.GetHeader(ODataConstants.ODataVersionHeader);
return(string.IsNullOrEmpty(headerValue)
? defaultVersion
: ODataUtils.StringToODataVersion(headerValue));
}
/// <summary>
/// Sets the 'OData-Version' HTTP header on the message based on the protocol version specified in the settings.
/// </summary>
/// <param name="message">The message to set the OData-Version header on.</param>
/// <param name="settings">The <see cref="ODataMessageWriterSettings"/> determining the protocol version to use.</param>
internal static void SetODataVersion(ODataMessage message, ODataMessageWriterSettings settings)
{
Debug.Assert(message != null, "message != null");
Debug.Assert(settings != null, "settings != null");
Debug.Assert(settings.Version.HasValue, "settings.Version.HasValue");
string odataVersionString = ODataUtils.ODataVersionToString(settings.Version.Value);
message.SetHeader(ODataConstants.ODataVersionHeader, odataVersionString);
}
/// <summary>
/// Internal constructor to instantiate an <see cref="ODataPreferenceHeader"/> from an <see cref="IODataResponseMessage"/>.
/// </summary>
/// <param name="responseMessage">The response message to get and set the "Preference-Applied" header.</param>
internal ODataPreferenceHeader(IODataResponseMessage responseMessage)
{
Debug.Assert(responseMessage != null, "responseMessage != null");
this.message = new ODataResponseMessage(responseMessage, /*writing*/ true, /*disableMessageStreamDisposal*/ false, /*maxMessageSize*/ -1);
this.preferenceHeaderName = PreferenceAppliedHeaderName;
}