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list.go
56 lines (46 loc) · 1.04 KB
/
list.go
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package server
import (
"bytes"
"context"
"fmt"
"strings"
"go.etcd.io/etcd/api/v3/etcdserverpb"
)
func (l *LimitedServer) list(ctx context.Context, r *etcdserverpb.RangeRequest) (*RangeResponse, error) {
if len(r.RangeEnd) == 0 {
return nil, fmt.Errorf("invalid range end length of 0")
}
prefix := string(append(r.RangeEnd[:len(r.RangeEnd)-1], r.RangeEnd[len(r.RangeEnd)-1]-1))
if !strings.HasSuffix(prefix, "/") {
prefix = prefix + "/"
}
start := string(bytes.TrimRight(r.Key, "\x00"))
if r.CountOnly {
rev, count, err := l.backend.Count(ctx, prefix)
if err != nil {
return nil, err
}
return &RangeResponse{
Header: txnHeader(rev),
Count: count,
}, nil
}
limit := r.Limit
if limit > 0 {
limit++
}
rev, kvs, err := l.backend.List(ctx, prefix, start, limit, r.Revision)
if err != nil {
return nil, err
}
resp := &RangeResponse{
Header: txnHeader(rev),
Count: int64(len(kvs)),
Kvs: kvs,
}
if limit > 0 && resp.Count > r.Limit {
resp.More = true
resp.Kvs = kvs[0 : limit-1]
}
return resp, nil
}