// handleSendPostMessage handles performing the passed HTTP request, reading the
// result, unmarshalling it, and delivering the unmarhsalled result to the
// provided response channel.
func (c *Client) handleSendPostMessage(details *sendPostDetails) {
// Post the request.
cmd := details.command
log.Tracef("Sending command [%s] with id %d", cmd.Method(), cmd.Id())
httpResponse, err := c.httpClient.Do(details.request)
if err != nil {
details.responseChan <- &futureResult{reply: nil, err: err}
return
}
// Read the raw bytes and close the response.
respBytes, err := btcjson.GetRaw(httpResponse.Body)
if err != nil {
details.responseChan <- &futureResult{reply: nil, err: err}
return
}
// Unmarshal the reply into a concrete result if possible.
reply, err := btcjson.ReadResultCmd(cmd.Method(), respBytes)
if err != nil {
details.responseChan <- &futureResult{reply: nil, err: err}
return
}
details.responseChan <- &futureResult{reply: &reply, err: nil}
}
// TestReadResultCmd tests that readResultCmd can properly unmarshall the
// returned []byte that contains a json reply for both known and unknown
// messages.
func TestReadResultCmd(t *testing.T) {
for i, tt := range resulttests {
result, err := btcjson.ReadResultCmd(tt.cmd, tt.msg)
if tt.pass {
if err != nil {
t.Errorf("Should read result: %d %v", i, err)
}
// Due to the pointer for the Error and other structs,
// we can't always guarantee byte for byte comparison.
if tt.comp {
msg2, err := json.Marshal(result)
if err != nil {
t.Errorf("Should unmarshal result: %d %v", i, err)
}
if !bytes.Equal(tt.msg, msg2) {
t.Errorf("json byte arrays differ. %d %v %v", i, tt.msg, msg2)
}
}
} else {
if err == nil {
t.Errorf("Should fail: %d, %s", i, tt.msg)
}
}
}
return
}
// handleMessage is the main handler for incoming requests. It enforces
// authentication, parses the incoming json, looks up and executes handlers
// (including pass through for standard RPC commands), sends the appropriate
// response. It also detects commands which are marked as long-running and
// sends them off to the asyncHander for processing.
func (c *Client) handleMessage(msg []byte) {
// Attempt to unmarshal the message as a known JSON-RPC command.
if cmd, err := btcjson.ParseMarshaledCmd(msg); err == nil {
// Commands that have an ID associated with them are not
// notifications. Since this is a client, it should not
// be receiving non-notifications.
if cmd.Id() != nil {
// Invalid response
log.Warnf("Remote server sent a non-notification "+
"JSON-RPC Request (Id: %v)", cmd.Id())
return
}
// Deliver the notification.
log.Tracef("Received notification [%s]", cmd.Method())
c.handleNotification(cmd)
return
}
// The message was not a command/notification, so it should be a reply
// to a previous request.
var r btcjson.Reply
if err := json.Unmarshal([]byte(msg), &r); err != nil {
log.Warnf("Unable to unmarshal inbound message as " +
"notification or response")
return
}
// Ensure the reply has an id.
if r.Id == nil {
log.Warnf("Received response with no id")
return
}
// Ensure the id is the expected type.
fid, ok := (*r.Id).(float64)
if !ok {
log.Warnf("Received unexpected id type: %T (value %v)",
*r.Id, *r.Id)
return
}
id := uint64(fid)
log.Tracef("Received response for id %d (result %v)", id, r.Result)
request := c.removeRequest(id)
// Nothing more to do if there is no request associated with this reply.
if request == nil || request.responseChan == nil {
log.Warnf("Received unexpected reply: %s (id %d)", r.Result, id)
return
}
// Unmarshal the reply into a concrete result if possible and deliver
// it to the associated channel.
reply, err := btcjson.ReadResultCmd(request.cmd.Method(), []byte(msg))
if err != nil {
log.Warnf("Failed to unmarshal reply to command [%s] "+
"(id %d): %v", request.cmd.Method(), id, err)
request.responseChan <- &futureResult{reply: nil, err: err}
return
}
// Since the command was successful, examine it to see if it's a
// notification, and if is, add it to the notification state so it
// can automatically be re-established on reconnect.
c.trackRegisteredNtfns(request.cmd)
// Deliver the reply.
request.responseChan <- &futureResult{reply: &reply, err: nil}
}