forked from cerc-io/plugeth
245f3146c2
New APIs added:
client.RegisterName(namespace, service) // makes service available to server
client.Notify(ctx, method, args...) // sends a notification
ClientFromContext(ctx) // to get a client in handler method
This is essentially a rewrite of the server-side code. JSON-RPC
processing code is now the same on both server and client side. Many
minor issues were fixed in the process and there is a new test suite for
JSON-RPC spec compliance (and non-compliance in some cases).
List of behavior changes:
- Method handlers are now called with a per-request context instead of a
per-connection context. The context is canceled right after the method
returns.
- Subscription error channels are always closed when the connection
ends. There is no need to also wait on the Notifier's Closed channel
to detect whether the subscription has ended.
- Client now omits "params" instead of sending "params": null when there
are no arguments to a call. The previous behavior was not compliant
with the spec. The server still accepts "params": null.
- Floating point numbers are allowed as "id". The spec doesn't allow
them, but we handle request "id" as json.RawMessage and guarantee that
the same number will be sent back.
- Logging is improved significantly. There is now a message at DEBUG
level for each RPC call served.
66 lines
2.2 KiB
Go
66 lines
2.2 KiB
Go
// Copyright 2015 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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package rpc
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import "fmt"
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const defaultErrorCode = -32000
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type methodNotFoundError struct{ method string }
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func (e *methodNotFoundError) ErrorCode() int { return -32601 }
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func (e *methodNotFoundError) Error() string {
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return fmt.Sprintf("the method %s does not exist/is not available", e.method)
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}
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type subscriptionNotFoundError struct{ namespace, subscription string }
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func (e *subscriptionNotFoundError) ErrorCode() int { return -32601 }
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func (e *subscriptionNotFoundError) Error() string {
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return fmt.Sprintf("no %q subscription in %s namespace", e.subscription, e.namespace)
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}
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// Invalid JSON was received by the server.
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type parseError struct{ message string }
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func (e *parseError) ErrorCode() int { return -32700 }
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func (e *parseError) Error() string { return e.message }
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// received message isn't a valid request
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type invalidRequestError struct{ message string }
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func (e *invalidRequestError) ErrorCode() int { return -32600 }
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func (e *invalidRequestError) Error() string { return e.message }
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// received message is invalid
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type invalidMessageError struct{ message string }
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func (e *invalidMessageError) ErrorCode() int { return -32700 }
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func (e *invalidMessageError) Error() string { return e.message }
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// unable to decode supplied params, or an invalid number of parameters
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type invalidParamsError struct{ message string }
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func (e *invalidParamsError) ErrorCode() int { return -32602 }
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func (e *invalidParamsError) Error() string { return e.message }
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