func (s *messageReceiver) call(name, method string, value []byte, inParamsType mojom_types.MojomStruct, outParamsType *mojom_types.MojomStruct) ([]byte, error) {
s.ctx.Infof("server: %s.%s: %#v", name, method, inParamsType)
inVType, err := transcoder.MojomStructToVDLType(inParamsType, s.header.desc)
if err != nil {
return nil, err
}
// Decode the vom.RawBytes from the mojom bytes and mojom type.
target := util.StructSplitTarget()
if err := transcoder.FromMojo(target, value, inVType); err != nil {
return nil, fmt.Errorf("transcoder.FromMojo failed: %v", err)
}
// inVdlValue is a struct, but we need to send []interface.
inargs := target.Fields()
inargsIfc := make([]interface{}, len(inargs))
for i := range inargs {
inargsIfc[i] = inargs[i]
}
// We know that the v23serverproxy will give us back a bunch of
// data in []interface{}. so we'll want to decode them into *vom.RawBytes.
s.ctx.Infof("%s %v", method, outParamsType)
var numParams int
if outParamsType != nil {
numParams = len(outParamsType.Fields)
}
outargs := make([]*vom.RawBytes, numParams)
outptrs := make([]interface{}, len(outargs))
for i := range outargs {
outptrs[i] = &outargs[i]
}
// Now, run the call without any authorization.
if err := v23.GetClient(s.ctx).Call(s.ctx, name, method, inargsIfc, outptrs, options.ServerAuthorizer{security.AllowEveryone()}); err != nil {
return nil, err
}
if outParamsType == nil {
return nil, nil
}
outVType, err := transcoder.MojomStructToVDLType(*outParamsType, s.header.desc)
if err != nil {
return nil, err
}
toMojoTarget := transcoder.ToMojomTarget()
if err := util.JoinRawBytesAsStruct(toMojoTarget, outVType, outargs); err != nil {
return nil, err
}
return toMojoTarget.Bytes(), nil
}
// callRemoteMethod calls the method remotely in a generic way.
// Produces []*vom.RawBytes at the end for the invoker to return.
func (fs fakeService) callRemoteMethod(ctx *context.T, method string, mi mojom_types.MojomInterface, desc map[string]mojom_types.UserDefinedType, argptrs []interface{}) ([]*vom.RawBytes, error) {
// We need to parse the signature result to get the method relevant info out.
found := false
var ordinal uint32
for ord, mm := range mi.Methods {
if *mm.DeclData.ShortName == method {
ordinal = ord
found = true
break
}
}
if !found {
return nil, fmt.Errorf("callRemoteMethod: method %s does not exist", method)
}
mm := mi.Methods[ordinal]
// A void function must have request id of 0, whereas one with response params
// should have a unique request id.
header := bindings.MessageHeader{
Type: ordinal,
Flags: bindings.MessageExpectsResponseFlag,
RequestId: fs.ids.Count(),
}
// Now produce the *bindings.Message that we will send to the other side.
inType, err := transcoder.MojomStructToVDLType(mm.Parameters, desc)
if err != nil {
return nil, err
}
message, err := encodeMessageFromVom(header, argptrs, inType)
if err != nil {
return nil, err
}
// Otherwise, make a generic call with the message.
outMessage, err := fs.callRemoteWithResponse(ctx, message)
if err != nil {
return nil, err
}
// Decode the *vom.RawBytes from the mojom bytes and mojom type.
outType, err := transcoder.MojomStructToVDLType(*mm.ResponseParams, desc)
if err != nil {
return nil, err
}
target := util.StructSplitTarget()
if err := transcoder.FromMojo(target, outMessage.Payload, outType); err != nil {
return nil, fmt.Errorf("transcoder.FromMojo failed: %v", err)
}
return target.Fields(), nil
}