/// <summary>Constructs an incoming request frame.</summary>
/// <param name="protocol">The Ice protocol.</param>
/// <param name="data">The frame data as an array segment.</param>
/// <param name="maxSize">The maximum payload size, checked during decompression.</param>
/// <param name="socketStream">The optional socket stream. The stream is non-null if there's still data to
/// read on the stream after the reading the request frame.</param>
internal IncomingRequestFrame(
Protocol protocol,
ArraySegment <byte> data,
int maxSize,
SocketStream?socketStream)
: base(protocol, maxSize)
{
SocketStream = socketStream;
var istr = new InputStream(data, Protocol.GetEncoding());
if (Protocol == Protocol.Ice1)
{
var requestHeader = new Ice1RequestHeader(istr);
Identity = requestHeader.Identity;
Facet = Ice1Definitions.GetFacet(requestHeader.FacetPath);
Location = Array.Empty <string>();
Operation = requestHeader.Operation;
IsIdempotent = requestHeader.OperationMode != OperationMode.Normal;
Context = requestHeader.Context;
Priority = default;
Deadline = DateTime.MaxValue;
}
else
{
int headerSize = istr.ReadSize();
int startPos = istr.Pos;
// We use the generated code for the header body and read the rest of the header "by hand".
var requestHeaderBody = new Ice2RequestHeaderBody(istr);
Identity = requestHeaderBody.Identity;
Facet = requestHeaderBody.Facet ?? "";
Location = requestHeaderBody.Location ?? Array.Empty <string>();
Operation = requestHeaderBody.Operation;
IsIdempotent = requestHeaderBody.Idempotent ?? false;
Priority = requestHeaderBody.Priority ?? default;
if (requestHeaderBody.Deadline < -1 || requestHeaderBody.Deadline == 0)
{
throw new InvalidDataException($"received invalid deadline value {requestHeaderBody.Deadline}");
}
// The infinite deadline is encoded as -1 and converted to DateTime.MaxValue
Deadline = requestHeaderBody.Deadline == -1 ?
DateTime.MaxValue : DateTime.UnixEpoch + TimeSpan.FromMilliseconds(requestHeaderBody.Deadline);
Context = requestHeaderBody.Context ?? new SortedDictionary <string, string>();
BinaryContext = istr.ReadBinaryContext();
if (istr.Pos - startPos != headerSize)
{
throw new InvalidDataException(
@$ "received invalid request header: expected {headerSize} bytes but read {istr.Pos - startPos
} bytes");
}
if (Location.Any(segment => segment.Length == 0))
{
throw new InvalidDataException("received request with an empty location segment");
}
}