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rest.go
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rest.go
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package server
import (
"fmt"
"github.com/orda-io/orda/client/pkg/errors"
"github.com/orda-io/orda/client/pkg/iface"
"github.com/orda-io/orda/client/pkg/model"
"github.com/orda-io/orda/server/managers"
"google.golang.org/grpc/credentials/insecure"
"io/ioutil"
"net/http"
"strings"
"github.com/grpc-ecosystem/grpc-gateway/v2/runtime"
httpSwagger "github.com/swaggo/http-swagger"
"github.com/swaggo/swag"
"google.golang.org/grpc"
"github.com/orda-io/orda/server/mongodb"
)
const (
apiGrpcGw = "/api/"
apiGrpcGwSwagger = "/swagger/"
apiCollections = "/collections/"
)
// RestServer is a control server to set up Orda system.
type RestServer struct {
ctx iface.OrdaContext
conf *managers.OrdaServerConfig
managers *managers.Managers
}
// NewRestServer creates a control server.
func NewRestServer(ctx iface.OrdaContext, conf *managers.OrdaServerConfig, clients *managers.Managers) *RestServer {
return &RestServer{
ctx: ctx,
conf: conf,
managers: clients,
}
}
// Start starts a RestServer
func (its *RestServer) Start() errors.OrdaError {
mux := http.NewServeMux()
mux.HandleFunc("/", its.echo)
if err := its.initGrpcGatewayServer(mux); err != nil {
return err
}
if err := http.ListenAndServe(its.conf.GetRestfulAddr(), its.allowCors(mux)); err != nil {
return errors.ServerInit.New(its.ctx.L(), err)
}
return nil
}
func (its *RestServer) allowCors(h http.Handler) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
if origin := r.Header.Get("Origin"); origin != "" {
w.Header().Set("Access-Control-Allow-Origin", "*")
if r.Method == http.MethodOptions && r.Header.Get("Access-Control-Request-Method") != "" {
w.Header().Set("Access-Control-Allow-Headers", r.Header.Get("Access-Control-Request-Headers"))
methods := []string{http.MethodGet, http.MethodHead, http.MethodPost, http.MethodPut, http.MethodDelete}
w.Header().Set("Access-Control-Allow-Methods", strings.Join(methods, ","))
its.ctx.L().Infof("send CORS option : %#v", w)
w.WriteHeader(200)
return
}
}
h.ServeHTTP(w, r)
})
}
type swaggerDoc struct {
jsonDoc string
}
func (its *swaggerDoc) init(conf *managers.OrdaServerConfig) {
bytes, err := ioutil.ReadFile(conf.SwaggerJSON)
if err != nil {
panic(err.Error())
}
its.jsonDoc = string(bytes)
if conf.SwaggerBasePath != "" {
its.jsonDoc = strings.ReplaceAll(its.jsonDoc, "\"/api/", "\"/"+strings.Trim(conf.SwaggerBasePath, "/")+"/api/")
}
}
func (its *swaggerDoc) ReadDoc() string {
return its.jsonDoc
}
func (its *RestServer) initGrpcGatewayServer(mux *http.ServeMux) errors.OrdaError {
gwMux := runtime.NewServeMux()
// register grpc proxy
gwOpts := []grpc.DialOption{
grpc.WithTransportCredentials(insecure.NewCredentials()),
}
if gwErr := model.RegisterOrdaServiceHandlerFromEndpoint(its.ctx, gwMux, its.conf.GetRPCServerAddr(), gwOpts); gwErr != nil {
return errors.ServerInit.New(its.ctx.L(), gwErr.Error())
}
mux.Handle(apiGrpcGw, gwMux)
its.ctx.L().Infof("open port: http://localhost%s%s",
its.conf.GetRestfulAddr(), apiGrpcGw)
// register swagger for grpc
swaggerJSON := &swaggerDoc{}
swaggerJSON.init(its.conf)
swag.Register(swag.Name, swaggerJSON)
swaggerHandler := httpSwagger.Handler(httpSwagger.URL("./doc.json"))
mux.Handle(apiGrpcGwSwagger, swaggerHandler)
its.ctx.L().Infof("open port: http://localhost%s%s", its.conf.GetRestfulAddr(), apiGrpcGwSwagger)
return nil
}
func (its *RestServer) echo(w http.ResponseWriter, r *http.Request) {
its.ctx.L().Infof("ignored request: %v %v%v", r.Method, r.Host, r.URL)
}
func (its *RestServer) createCollections(res http.ResponseWriter, req *http.Request) {
switch req.Method {
case http.MethodPut:
collectionName := strings.TrimPrefix(req.URL.Path, apiCollections)
num, err := mongodb.MakeCollection(its.ctx, its.managers.Mongo, collectionName)
var msg string
if err != nil {
msg = fmt.Sprintf("Fail to create collection '%s'", collectionName)
} else {
msg = fmt.Sprintf("Created collection '%s(%d)'", collectionName, num)
}
_, err2 := res.Write([]byte(msg))
if err2 != nil {
_ = errors.ServerInit.New(its.ctx.L(), err2.Error())
return
}
its.ctx.L().Infof(msg)
}
}