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|
package client
import (
"bufio"
"context"
"encoding/json"
"net/http"
"reflect"
"strings"
)
var EventMap = map[string]any{
"storage.write": StorageWrite{},
}
type EventMessage struct {
Type string `json:"type"`
Properties json.RawMessage `json:"properties"`
}
func (c *Client) Event(ctx context.Context) (<-chan any, error) {
events := make(chan any)
req, err := http.NewRequestWithContext(ctx, "GET", c.Server+"event", nil)
if err != nil {
return nil, err
}
resp, err := http.DefaultClient.Do(req)
if err != nil {
return nil, err
}
go func() {
defer close(events)
defer resp.Body.Close()
scanner := bufio.NewScanner(resp.Body)
for scanner.Scan() {
line := scanner.Text()
if strings.HasPrefix(line, "data: ") {
data := strings.TrimPrefix(line, "data: ")
var eventMsg EventMessage
if err := json.Unmarshal([]byte(data), &eventMsg); err != nil {
continue
}
eventTemplate, exists := EventMap[eventMsg.Type]
if !exists {
continue
}
eventValue := reflect.New(reflect.TypeOf(eventTemplate)).Interface()
if err := json.Unmarshal(eventMsg.Properties, eventValue); err != nil {
continue
}
select {
case events <- eventValue:
case <-ctx.Done():
return
}
}
}
}()
return events, nil
}
|
