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rpc: fix issue with null JSON-RPC messages (#21497)

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This commit is contained in:
Felix Lange 2020-08-28 16:27:58 +02:00 committed by GitHub
parent 05280a7ae3
commit 5883afb3ef
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GPG Key ID: 4AEE18F83AFDEB23
3 changed files with 16 additions and 3 deletions
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13
rpc/json.go
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@ -202,15 +202,22 @@ func (c *jsonCodec) remoteAddr() string {
return c.remote
}
func (c *jsonCodec) readBatch() (msg []*jsonrpcMessage, batch bool, err error) {
func (c *jsonCodec) readBatch() (messages []*jsonrpcMessage, batch bool, err error) {
// Decode the next JSON object in the input stream.
// This verifies basic syntax, etc.
var rawmsg json.RawMessage
if err := c.decode(&rawmsg); err != nil {
return nil, false, err
}
msg, batch = parseMessage(rawmsg)
return msg, batch, nil
messages, batch = parseMessage(rawmsg)
for i, msg := range messages {
if msg == nil {
// Message is JSON 'null'. Replace with zero value so it
// will be treated like any other invalid message.
messages[i] = new(jsonrpcMessage)
}
}
return messages, batch, nil
}
func (c *jsonCodec) writeJSON(ctx context.Context, v interface{}) error {

3
rpc/testdata/invalid-batch.js vendored
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@ -10,5 +10,8 @@
--> [1,2,3]
<-- [{"jsonrpc":"2.0","id":null,"error":{"code":-32600,"message":"invalid request"}},{"jsonrpc":"2.0","id":null,"error":{"code":-32600,"message":"invalid request"}},{"jsonrpc":"2.0","id":null,"error":{"code":-32600,"message":"invalid request"}}]
--> [null]
<-- [{"jsonrpc":"2.0","id":null,"error":{"code":-32600,"message":"invalid request"}}]
--> [{"jsonrpc":"2.0","id":1,"method":"test_echo","params":["foo",1]},55,{"jsonrpc":"2.0","id":2,"method":"unknown_method"},{"foo":"bar"}]
<-- [{"jsonrpc":"2.0","id":1,"result":{"String":"foo","Int":1,"Args":null}},{"jsonrpc":"2.0","id":null,"error":{"code":-32600,"message":"invalid request"}},{"jsonrpc":"2.0","id":2,"error":{"code":-32601,"message":"the method unknown_method does not exist/is not available"}},{"jsonrpc":"2.0","id":null,"error":{"code":-32600,"message":"invalid request"}}]

3
rpc/testdata/invalid-nonobj.js vendored
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@ -2,3 +2,6 @@
--> 1
<-- {"jsonrpc":"2.0","id":null,"error":{"code":-32600,"message":"invalid request"}}
--> null
<-- {"jsonrpc":"2.0","id":null,"error":{"code":-32600,"message":"invalid request"}}