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chain ws to synchronizer and streamer
subscribe latest blk via tm, sync historical via http
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,96 @@ | ||
| package client | ||
|
|
||
| import ( | ||
| "bytes" | ||
| "context" | ||
| "fmt" | ||
| "time" | ||
|
|
||
| tmjson "github.com/tendermint/tendermint/libs/json" | ||
| coretypes "github.com/tendermint/tendermint/rpc/core/types" | ||
| types "github.com/tendermint/tendermint/rpc/jsonrpc/types" | ||
| "nhooyr.io/websocket" | ||
| "nhooyr.io/websocket/wsjson" | ||
| ) | ||
|
|
||
| type WebsocketClient struct { | ||
| url string | ||
| wsconn *websocket.Conn | ||
| } | ||
|
|
||
| func NewWebsocketClient(url string) *WebsocketClient { | ||
| return &WebsocketClient{url: url} | ||
| } | ||
|
|
||
| func (c *WebsocketClient) Subscribe() (<-chan *coretypes.ResultEvent, error) { | ||
| ctx, cancel := context.WithTimeout(context.Background(), time.Minute) | ||
| defer cancel() | ||
|
|
||
| conn, _, err := websocket.Dial(ctx, c.url, nil) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
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| c.wsconn = conn | ||
| conn.SetReadLimit(10240000) | ||
|
|
||
| chResult := make(chan *coretypes.ResultEvent) | ||
| go func() { | ||
| defer close(chResult) | ||
| for { | ||
| ctx, cancel := context.WithTimeout(context.Background(), time.Second*10) | ||
| _, r, err := c.wsconn.Reader(ctx) | ||
| if err != nil { | ||
| cancel() | ||
| continue | ||
| } | ||
| buf := new(bytes.Buffer) | ||
| _, err = buf.ReadFrom(r) | ||
| if err != nil { | ||
| continue | ||
| } | ||
| cancel() | ||
| bz := buf.Bytes() | ||
| res := new(types.RPCResponse) | ||
| err = tmjson.Unmarshal(bz, res) | ||
| if err != nil { | ||
| // fmt.Printf("mm-unmarshal-err: %+v\n", err) | ||
| // continue | ||
| fmt.Printf("mm-read-res-err: %+v\n", err) | ||
| chResult <- nil | ||
| break | ||
| } | ||
| ev := new(coretypes.ResultEvent) | ||
| if err := tmjson.Unmarshal(res.Result, &ev); err != nil { | ||
| fmt.Printf("mm-read-ev-err: %+v\n", err) | ||
| chResult <- nil | ||
| break | ||
| } | ||
| chResult <- ev | ||
| time.Sleep(time.Second) | ||
| } | ||
| }() | ||
| return chResult, nil | ||
| } | ||
|
|
||
| func (c *WebsocketClient) Send( | ||
| method string, | ||
| params []string, | ||
| ) error { | ||
| ctx, cancel := context.WithTimeout(context.Background(), time.Minute) | ||
| defer cancel() | ||
|
|
||
| return wsjson.Write(ctx, c.wsconn, map[string]interface{}{ | ||
| "jsonrpc": "2.0", | ||
| "method": method, | ||
| "params": params, | ||
| "id": 1, | ||
| }) | ||
| } | ||
|
|
||
| func (c *WebsocketClient) Close() { | ||
| if c.wsconn != nil { | ||
| c.wsconn.Close(websocket.StatusNormalClosure, "") | ||
| c.wsconn = nil | ||
| } | ||
| } |
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