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generate.go
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generate.go
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package main
import (
"fmt"
"io/ioutil"
"log"
"net/http"
"os"
"path/filepath"
"github.com/gorilla/mux"
"github.com/katakonst/swagger-mock/common"
)
type Server struct {
Host string
RuleFile string
Routes []Route
}
type Route struct {
OpId string
Method string
Path string
RuleFile string
}
type ServerRoute struct {
route Route
routeFunc interface{}
}
var commonFiles = []string{"MockServer.go", "processRoute.go", "log.go"}
func GenerateServer(config Config) error {
p := Parser{fileName: config.SpecFile}
server, err := p.parseServer(config)
if err != nil {
return err
}
server.RuleFile = filepath.Base(config.RuleFile)
t := Template{FileName: "main.tmpl", Entity: server, FinalPath: config.OutDir + "/main.go"}
if err = t.fillTemplate(); err != nil {
return err
}
for _, route := range server.Routes {
route.RuleFile = server.RuleFile
tmpl := Template{FileName: "route.tmpl", Entity: route, FinalPath: config.OutDir + "/" + route.OpId + ".go"}
if err = tmpl.fillTemplate(); err != nil {
return err
}
}
for _, file := range commonFiles {
if err = writeFile(loadedTempl[file], config.OutDir+"/"+file); err != nil {
return err
}
}
return copyFile(config.RuleFile, config.OutDir+"/"+filepath.Base(config.RuleFile))
}
func writeFile(data string, dest string) error {
f, err := os.Create(dest)
if err != nil {
return fmt.Errorf("writeFile:createfile %v", err)
}
f.Close()
if err = ioutil.WriteFile(dest, []byte(data), 0644); err != nil {
return fmt.Errorf("writeFile %s: %v", dest, err)
}
return nil
}
func copyFile(fileName string, dest string) error {
data, err := ioutil.ReadFile(fileName)
if err != nil {
log.Fatal(err)
}
f, err := os.Create(dest)
if err != nil {
return fmt.Errorf("copyFile:createfile %v", err)
}
f.Close()
if err = ioutil.WriteFile(dest, data, 0644); err != nil {
return fmt.Errorf("writeFile %s: %v", dest, err)
}
return nil
}
func GenerateEmbededServer(config Config) error {
p := Parser{fileName: config.SpecFile}
server, err := p.parseServer(config)
if err != nil {
return err
}
var serverRoutes []ServerRoute
for _, route := range server.Routes {
serverRoute := ServerRoute{}
serverRoute.route = route
serverRoute.routeFunc = func(w http.ResponseWriter, r *http.Request) {
mockServer := common.ParseRules(config.RuleFile)
logger := common.NewLogger("info")
if err := common.ProcessRule(w, r, mockServer.Rules, serverRoute.route.OpId); err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
logger.Errorf("Error while processing opid %s, %v", route.OpId, err)
return
}
}
serverRoutes = append(serverRoutes, serverRoute)
}
ListenServer(serverRoutes, config)
return nil
}
func ListenServer(serverRoutes []ServerRoute, conf Config) {
router := mux.NewRouter()
for _, route := range serverRoutes {
router.HandleFunc(route.route.Path,
route.routeFunc.(func(http.ResponseWriter, *http.Request))).
Methods(route.route.Method)
}
logger := common.NewLogger("info")
logger.Infof("Server started on %s", conf.Host)
log.Fatal(http.ListenAndServe(conf.Host, router))
}