Add cAdvisor into third_party

third_party/src/github.com/google/cadvisor/client/client.go

@@ -0,0 +1,96 @@
+// Copyright 2014 Google Inc. All Rights Reserved.
+//
+// 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,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package cadvisor
+
+import (
+	"encoding/json"
+	"fmt"
+	"io/ioutil"
+	"net/http"
+	"strings"
+
+	"github.com/google/cadvisor/info"
+)
+
+type Client struct {
+	baseUrl string
+}
+
+func NewClient(URL string) (*Client, error) {
+	c := &Client{
+		baseUrl: strings.Join([]string{
+			URL,
+			"api/v1.0",
+		}, "/"),
+	}
+	_, err := c.MachineInfo()
+	if err != nil {
+		return nil, err
+	}
+	return c, nil
+}
+
+func (self *Client) machineInfoUrl() string {
+	return strings.Join([]string{self.baseUrl, "machine"}, "/")
+}
+
+func (self *Client) MachineInfo() (minfo *info.MachineInfo, err error) {
+	u := self.machineInfoUrl()
+	ret := new(info.MachineInfo)
+	err = self.httpGetJsonData(ret, u, "machine info")
+	if err != nil {
+		return
+	}
+	minfo = ret
+	return
+}
+
+func (self *Client) containerInfoUrl(name string) string {
+	if name[0] == '/' {
+		name = name[1:]
+	}
+	return strings.Join([]string{self.baseUrl, "containers", name}, "/")
+}
+
+func (self *Client) httpGetJsonData(data interface{}, url, infoName string) error {
+	resp, err := http.Get(url)
+	if err != nil {
+		err = fmt.Errorf("unable to get %v: %v", infoName, err)
+		return err
+	}
+	defer resp.Body.Close()
+	body, err := ioutil.ReadAll(resp.Body)
+	if err != nil {
+		err = fmt.Errorf("unable to read all %v: %v", infoName, err)
+		return err
+	}
+	err = json.Unmarshal(body, data)
+	if err != nil {
+		err = fmt.Errorf("unable to unmarshal %v (%v): %v", infoName, string(body), err)
+		return err
+	}
+	return nil
+}
+
+func (self *Client) ContainerInfo(name string) (cinfo *info.ContainerInfo, err error) {
+	u := self.containerInfoUrl(name)
+	ret := new(info.ContainerInfo)
+	err = self.httpGetJsonData(ret, u, fmt.Sprintf("container info for %v", name))
+	if err != nil {
+		return
+	}
+	cinfo = ret
+	return
+}