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logview.go
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logview.go
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// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements. See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership. The ASF licenses this file
// to you 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 odps
import (
"fmt"
"github.com/jiuzhiqian/aliyun-odps-go-sdk/odps/security"
"github.com/pkg/errors"
"io/ioutil"
"log"
"net/http"
"net/url"
)
const (
HostDefault = "https://logview.alibaba-inc.com"
)
type LogView struct {
odpsIns *Odps
logViewHost string
}
func NewLogView(odpsIns *Odps) *LogView {
return &LogView{odpsIns: odpsIns}
}
func (lv *LogView) LogViewHost() string {
if lv.logViewHost != "" {
return lv.logViewHost
}
client := lv.odpsIns.RestClient()
err := client.GetWithParseFunc("/logview/host", nil, func(res *http.Response) error {
buf, err := ioutil.ReadAll(res.Body)
if err != nil {
return errors.WithStack(err)
}
lv.logViewHost = string(buf)
return nil
})
if err != nil {
log.Printf("get logview err, %v", err)
return HostDefault
}
if lv.logViewHost == "" {
return HostDefault
}
return lv.logViewHost
}
func (lv *LogView) SetLogViewHost(logViewHost string) {
lv.logViewHost = logViewHost
}
func (lv *LogView) GenerateLogView(instance *Instance, hours int) (string, error) {
token, err := lv.generateInstanceToken(instance, hours)
if err != nil {
return "", errors.WithStack(err)
}
logViewHost := lv.LogViewHost()
logViewUrl, err := url.Parse(logViewHost)
if err != nil {
return "", errors.WithStack(err)
}
logViewUrl.Path = "logview"
queryArgs := logViewUrl.Query()
client := lv.odpsIns.RestClient()
queryArgs.Set("h", client.Endpoint())
queryArgs.Set("p", instance.ProjectName())
queryArgs.Set("i", instance.Id())
queryArgs.Set("token", token)
logViewUrl.RawQuery = queryArgs.Encode()
return logViewUrl.String(), nil
}
func (lv *LogView) generateInstanceToken(instance *Instance, hours int) (string, error) {
policyTpl := `{
"expires_in_hours": %d,
"policy": {
"Statement": [{
"Action": ["odps:Read"],
"Effect": "Allow",
"Resource": "acs:odps:*:projects/%s/instances/%s"
}],
"Version": "1"
}}`
policy := fmt.Sprintf(policyTpl, hours, instance.ProjectName(), instance.Id())
sm := security.NewSecurityManager(lv.odpsIns.RestClient(), instance.ProjectName())
return sm.GenerateAuthorizationToken(policy)
}