forked from pingcap/tidb
/
client.go
88 lines (78 loc) · 2.1 KB
/
client.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
// Copyright 2016 PingCAP, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// See the License for the specific language governing permissions and
// limitations under the License.
package apiutil
import (
"net/http"
"net/url"
"time"
"github.com/juju/errors"
"github.com/pingcap/kvproto/pkg/metapb"
"github.com/pingcap/kvproto/pkg/pdpb"
)
const (
apiPrefix = "/pd/api/v1"
)
// Client is a client to access PD APIs.
type Client struct {
hc *http.Client
url string
}
// NewClient returns a client to access PD APIs.
func NewClient(addr string, timeout time.Duration) (*Client, error) {
u, err := url.Parse(addr)
if err != nil {
return nil, errors.Trace(err)
}
u.Path = apiPrefix
scheme := u.Scheme
if u.Scheme == "unix" || u.Scheme == "unixs" {
u.Scheme = "http"
}
client := &Client{
hc: NewHTTPClient(scheme, timeout),
url: u.String(),
}
return client, nil
}
// GetLeader returns the PD leader info.
func (c *Client) GetLeader() (*pdpb.Member, error) {
leaderURL := c.url + "/leader"
resp, err := c.hc.Get(leaderURL)
if err != nil {
return nil, errors.Trace(err)
}
if resp.StatusCode != http.StatusOK {
return nil, errors.Errorf("GET %s: %s", leaderURL, resp.Status)
}
leader := &pdpb.Member{}
if err := ReadJSON(resp.Body, leader); err != nil {
return nil, errors.Trace(err)
}
return leader, nil
}
// GetClusterID returns the Cluster ID.
func (c *Client) GetClusterID() (uint64, error) {
clusterURL := c.url + "/cluster"
resp, err := c.hc.Get(clusterURL)
if err != nil {
return 0, errors.Trace(err)
}
if resp.StatusCode != http.StatusOK {
return 0, errors.Errorf("GET %s: %s", clusterURL, resp.Status)
}
cluster := &metapb.Cluster{}
if err := ReadJSON(resp.Body, cluster); err != nil {
return 0, errors.Trace(err)
}
return cluster.GetId(), nil
}