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server.go
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server.go
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package gnmic
import (
"context"
"encoding/json"
"io"
"net/http"
"strconv"
"time"
yson "github.com/ghodss/yaml"
ginzap "github.com/gin-contrib/zap"
"github.com/gin-gonic/gin"
"github.com/orb-community/orb-gnmic/config"
"github.com/orb-community/orb-gnmic/runner"
"go.uber.org/zap"
"gopkg.in/yaml.v3"
)
type ReturnPolicyData struct {
State runner.State `yaml:"status"`
config.Policy
}
type ReturnValue struct {
Message string `json:"message"`
}
func (o *Gnmic) startServer() error {
gin.SetMode(gin.ReleaseMode)
o.router = gin.New()
o.router.Use(ginzap.Ginzap(o.logger, time.RFC3339, true))
o.router.Use(ginzap.RecoveryWithZap(o.logger, true))
// Routes
o.router.GET("/api/v1/status", o.getStatus)
o.router.GET("/api/v1/capabilities", o.getCapabilities)
o.router.GET("/api/v1/policies", o.getPolicies)
o.router.POST("/api/v1/policies", o.createPolicy)
o.router.GET("/api/v1/policies/:policy", o.getPolicy)
o.router.DELETE("/api/v1/policies/:policy", o.deletePolicy)
serverHost := o.conf.ServerHost
serverPort := strconv.FormatUint(o.conf.ServerPort, 10)
go func() {
serv := serverHost + ":" + serverPort
o.logger.Info("starting gnmic server at: " + serv)
if err := o.router.Run(serv); err != nil {
o.logger.Fatal("shutting down the server", zap.Error(err))
}
}()
return nil
}
func (o *Gnmic) getStatus(c *gin.Context) {
o.stat.UpTime = time.Since(o.stat.StartTime)
c.IndentedJSON(http.StatusOK, o.stat)
}
func (o *Gnmic) getCapabilities(c *gin.Context) {
j, err := yson.YAMLToJSON(o.capabilities)
if err != nil {
c.IndentedJSON(http.StatusBadRequest, ReturnValue{err.Error()})
return
}
var ret interface{}
err = json.Unmarshal(j, &ret)
if err != nil {
c.IndentedJSON(http.StatusBadRequest, ReturnValue{err.Error()})
return
}
c.IndentedJSON(http.StatusOK, ret)
}
func (o *Gnmic) getPolicies(c *gin.Context) {
policies := make([]string, 0, len(o.policies))
for k := range o.policies {
policies = append(policies, k)
}
c.IndentedJSON(http.StatusOK, policies)
}
func (o *Gnmic) getPolicy(c *gin.Context) {
policy := c.Param("policy")
rInfo, ok := o.policies[policy]
if ok {
c.YAML(http.StatusOK, map[string]ReturnPolicyData{policy: {rInfo.Instance.GetStatus(), rInfo.Policy}})
} else {
c.IndentedJSON(http.StatusNotFound, ReturnValue{"policy not found"})
}
}
func (o *Gnmic) createPolicy(c *gin.Context) {
if t := c.Request.Header.Get("Content-type"); t != "application/x-yaml" {
c.IndentedJSON(http.StatusBadRequest, ReturnValue{"invalid Content-Type. Only 'application/x-yaml' is supported"})
return
}
body, err := io.ReadAll(c.Request.Body)
if err != nil {
c.IndentedJSON(http.StatusBadRequest, ReturnValue{err.Error()})
return
}
var payload map[string]config.Policy
err = yaml.Unmarshal(body, &payload)
if err != nil {
c.IndentedJSON(http.StatusBadRequest, ReturnValue{err.Error()})
return
}
if len(payload) > 1 {
c.IndentedJSON(http.StatusBadRequest, ReturnValue{"only single policy allowed per request"})
return
}
var policy string
var data config.Policy
for policy, data = range payload {
_, ok := o.policies[policy]
if ok {
c.IndentedJSON(http.StatusConflict, ReturnValue{"policy already exists"})
return
}
if len(data.Config.Subscriptions) == 0 {
c.IndentedJSON(http.StatusForbidden, ReturnValue{"subscriptions field is required"})
return
}
if len(data.Config.Targets) == 0 {
c.IndentedJSON(http.StatusForbidden, ReturnValue{"targets field is required"})
return
}
if len(data.Config.Outputs) == 0 {
c.IndentedJSON(http.StatusForbidden, ReturnValue{"outputs field is required"})
return
}
}
r := runner.New(o.logger, policy, o.policiesDir)
if err := r.Configure(&data); err != nil {
c.IndentedJSON(http.StatusBadRequest, ReturnValue{err.Error()})
return
}
runnerCtx := context.WithValue(o.ctx, "routine", policy)
if err := r.Start(context.WithCancel(runnerCtx)); err != nil {
c.IndentedJSON(http.StatusBadRequest, ReturnValue{err.Error()})
return
}
o.policies[policy] = RunnerInfo{Policy: data, Instance: r}
c.YAML(http.StatusCreated, map[string]ReturnPolicyData{policy: {r.GetStatus(), data}})
}
func (o *Gnmic) deletePolicy(c *gin.Context) {
policy := c.Param("policy")
r, ok := o.policies[policy]
if ok {
if err := r.Instance.Stop(o.ctx); err != nil {
c.IndentedJSON(http.StatusBadRequest, ReturnValue{err.Error()})
return
}
delete(o.policies, policy)
c.IndentedJSON(http.StatusOK, ReturnValue{policy + " was deleted"})
} else {
c.IndentedJSON(http.StatusNotFound, ReturnValue{"policy not found"})
}
}