/// <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="sizeMax">The maximum payload size, checked during decompression.</param>
public IncomingRequestFrame(Protocol protocol, ArraySegment <byte> data, int sizeMax)
: base(data, protocol, sizeMax)
{
var istr = new InputStream(Data, Protocol.GetEncoding());
if (Protocol == Protocol.Ice1)
{
Identity = new Identity(istr);
Facet = istr.ReadFacet11();
Location = Array.Empty <string>();
Operation = istr.ReadString();
IsIdempotent = istr.ReadOperationMode() != OperationMode.Normal;
Context = istr.ReadDictionary(minKeySize: 1,
minValueSize: 1,
InputStream.IceReaderIntoString,
InputStream.IceReaderIntoString);
Priority = default;
}
else
{
var requestHeader = new Ice2RequestHeader(istr);
Identity = requestHeader.Identity;
Facet = requestHeader.Facet ?? "";
Location = requestHeader.Location ?? Array.Empty <string>();
Operation = requestHeader.Operation;
IsIdempotent = requestHeader.Idempotent;
Priority = requestHeader.Priority ?? default;
Context = new Dictionary <string, string>();
if (Location.Any(segment => segment.Length == 0))
{
throw new InvalidDataException("received request with empty location segment");
}
}
if (Identity.Name.Length == 0)
{
throw new InvalidDataException("received request with null identity");
}
if (Operation.Length == 0)
{
throw new InvalidDataException("received request with empty operation name");
}
(int size, int sizeLength, Encoding encoding) =
Data.Slice(istr.Pos).AsReadOnlySpan().ReadEncapsulationHeader(Protocol.GetEncoding());
Payload = Data.Slice(istr.Pos, size + sizeLength); // the payload is the encapsulation
if (Protocol == Protocol.Ice2 && BinaryContext.TryGetValue(0, out ReadOnlyMemory <byte> value))
{
Context = value.Read(istr => istr.ReadDictionary(minKeySize: 1,
minValueSize: 1,
InputStream.IceReaderIntoString,
InputStream.IceReaderIntoString));
}
if (protocol == Protocol.Ice1 && size + 4 + istr.Pos != data.Count)
{
// The payload holds an encapsulation and the encapsulation must use up the full buffer with ice1.
// "4" corresponds to fixed-length size with the 1.1 encoding.
throw new InvalidDataException($"invalid request encapsulation size: {size}");
}
Encoding = encoding;
HasCompressedPayload = Encoding == Encoding.V20 && Payload[sizeLength + 2] != 0;
}
