deb.open-vault/api/sys_monitor.go

75 lines
1.3 KiB
Go

// Copyright (c) HashiCorp, Inc.
// SPDX-License-Identifier: MPL-2.0
package api
import (
"bufio"
"context"
"fmt"
"net/http"
)
// Monitor returns a channel that outputs strings containing the log messages
// coming from the server.
func (c *Sys) Monitor(ctx context.Context, logLevel string, logFormat string) (chan string, error) {
r := c.c.NewRequest(http.MethodGet, "/v1/sys/monitor")
if logLevel == "" {
r.Params.Add("log_level", "info")
} else {
r.Params.Add("log_level", logLevel)
}
if logFormat == "" {
r.Params.Add("log_format", "standard")
} else {
r.Params.Add("log_format", logFormat)
}
resp, err := c.c.RawRequestWithContext(ctx, r)
if err != nil {
return nil, err
}
logCh := make(chan string, 64)
go func() {
scanner := bufio.NewScanner(resp.Body)
droppedCount := 0
defer close(logCh)
defer resp.Body.Close()
for {
if ctx.Err() != nil {
return
}
if !scanner.Scan() {
return
}
logMessage := scanner.Text()
if droppedCount > 0 {
select {
case logCh <- fmt.Sprintf("Monitor dropped %d logs during monitor request\n", droppedCount):
droppedCount = 0
default:
droppedCount++
continue
}
}
select {
case logCh <- logMessage:
default:
droppedCount++
}
}
}()
return logCh, nil
}