func rpcHandler(w http.ResponseWriter, r *http.Request) {
if r.Method != "POST" {
http.Error(w, "Method not allowed", http.StatusMethodNotAllowed)
return
}
defer r.Body.Close()
var service, method string
var request interface{}
// response content type
w.Header().Set("Content-Type", "application/json")
switch r.Header.Get("Content-Type") {
case "application/json":
b, err := ioutil.ReadAll(r.Body)
if err != nil {
e := errors.BadRequest("go.micro.api", err.Error())
w.WriteHeader(400)
w.Write([]byte(e.Error()))
return
}
var body map[string]interface{}
err = json.Unmarshal(b, &body)
if err != nil {
e := errors.BadRequest("go.micro.api", err.Error())
w.WriteHeader(400)
w.Write([]byte(e.Error()))
return
}
service = body["service"].(string)
method = body["method"].(string)
request = body["request"]
default:
r.ParseForm()
service = r.Form.Get("service")
method = r.Form.Get("method")
json.Unmarshal([]byte(r.Form.Get("request")), &request)
}
var response map[string]interface{}
req := client.NewJsonRequest(service, method, request)
err := client.Call(context.Background(), req, &response)
if err != nil {
log.Errorf("Error calling %s.%s: %v", service, method, err)
ce := errors.Parse(err.Error())
switch ce.Code {
case 0:
w.WriteHeader(500)
default:
w.WriteHeader(int(ce.Code))
}
w.Write([]byte(ce.Error()))
return
}
b, _ := json.Marshal(response)
w.Header().Set("Content-Length", strconv.Itoa(len(b)))
w.Write(b)
}
func Commands() []cli.Command {
commands := []cli.Command{
{
Name: "registry",
Usage: "Query registry",
Subcommands: registryCommands(),
},
{
Name: "query",
Usage: "Query a service method using rpc",
Action: func(c *cli.Context) {
if len(c.Args()) < 2 {
fmt.Println("require service and method")
return
}
service := c.Args()[0]
method := c.Args()[1]
var request map[string]interface{}
var response map[string]interface{}
json.Unmarshal([]byte(strings.Join(c.Args()[2:], " ")), &request)
req := client.NewJsonRequest(service, method, request)
err := client.Call(context.Background(), req, &response)
if err != nil {
fmt.Printf("error calling %s.%s: %v\n", service, method, err)
return
}
b, _ := json.MarshalIndent(response, "", "\t")
fmt.Println(string(b))
},
},
{
Name: "health",
Usage: "Query the health of a service",
Action: func(c *cli.Context) {
if !c.Args().Present() {
fmt.Println("require service name")
return
}
service, err := registry.GetService(c.Args().First())
if err != nil {
fmt.Printf("error querying registry: %v", err)
return
}
fmt.Println("node\t\taddress:port\t\tstatus")
req := client.NewRequest(service.Name, "Debug.Health", &health.Request{})
for _, node := range service.Nodes {
address := node.Address
if node.Port > 0 {
address = fmt.Sprintf("%s:%d", address, node.Port)
}
rsp := &health.Response{}
err := client.CallRemote(context.Background(), address, req, rsp)
var status string
if err != nil {
status = err.Error()
} else {
status = rsp.Status
}
fmt.Printf("%s\t\t%s:%d\t\t%s\n", node.Id, node.Address, node.Port, status)
}
},
},
}
return append(commands, registryCommands()...)
}