gosora/router_gen/main.go

175 lines
4.3 KiB
Go

/* WIP Under Construction */
// The router generator might be discontinued in favour of syncmaps in Go 1.9, it will be temporarily used for a couple of months as a lockless alternative to maps
package main
import "log"
import "fmt"
//import "strings"
import "os"
var route_list []Route
var route_groups []RouteGroup
func main() {
fmt.Println("Generating the router...")
// Load all the routes...
routes()
var out string
var fdata string = "// Code generated by. DO NOT EDIT.\n/* This file was automatically generated by the software. Please don't edit it as your changes may be overwritten at any moment. */\n// The router generator might be discontinued in favour of syncmaps in Go 1.9, it will be temporarily used for a couple of months as a lockless alternative to maps\n"
for _, route := range route_list {
var end int
if route.Path[len(route.Path)-1] == '/' {
end = len(route.Path) - 1
} else {
end = len(route.Path) - 1
}
out += "\n\t\tcase \"" + route.Path[0:end] + "\":"
if route.Before != "" {
out += "\n\t\t\t" + route.Before
}
out += "\n\t\t\t" + route.Name + "(w,req"
for _, item := range route.Vars {
out += "," + item
}
out += ")\n\t\t\treturn"
}
for _, group := range route_groups {
var end int
if group.Path[len(group.Path)-1] == '/' {
end = len(group.Path) - 1
} else {
end = len(group.Path) - 1
}
out += `
case "` + group.Path[0:end] + `":
switch(req.URL.Path) {`
var default_route Route
for _, route := range group.Routes {
if group.Path == route.Path {
default_route = route
continue
}
out += "\n\t\t\t\tcase \"" + route.Path + "\":"
if route.Before != "" {
out += "\n\t\t\t\t\t" + route.Before
}
out += "\n\t\t\t\t\t" + route.Name + "(w,req"
for _, item := range route.Vars {
out += "," + item
}
out += ")\n\t\t\t\t\treturn"
}
if default_route.Name != "" {
out += "\n\t\t\t\tdefault:"
if default_route.Before != "" {
out += "\n\t\t\t\t\t" + default_route.Before
}
out += "\n\t\t\t\t\t" + default_route.Name + "(w,req"
for _, item := range default_route.Vars {
out += ", " + item
}
out += ")\n\t\t\t\t\treturn"
}
out += "\n\t\t\t}"
}
fdata += `package main
//import "fmt"
import "sync"
import "strings"
import "net/http"
type GenRouter struct {
UploadHandler func(http.ResponseWriter, *http.Request)
sync.RWMutex // Temporary Fallback
old_routes map[string]func(http.ResponseWriter, *http.Request) // Temporary Fallback
}
func NewGenRouter(uploads http.Handler) *GenRouter {
return &GenRouter{
UploadHandler: http.StripPrefix("/uploads/",uploads).ServeHTTP,
old_routes: make(map[string]func(http.ResponseWriter, *http.Request)),
}
}
func (router *GenRouter) Handle(_ string, _ http.Handler) {
}
func (router *GenRouter) HandleFunc(pattern string, handle func(http.ResponseWriter, *http.Request)) {
router.Lock()
router.old_routes[pattern] = handle
router.Unlock()
}
func (router *GenRouter) ServeHTTP(w http.ResponseWriter, req *http.Request) {
//if req.URL.Path == "/" {
// default_route(w,req)
// return
//}
if req.URL.Path[0] != '/' {
w.WriteHeader(405)
w.Write([]byte(""))
return
}
var prefix, extra_data string
prefix = req.URL.Path[0:strings.IndexByte(req.URL.Path[1:],'/') + 1]
if req.URL.Path[len(req.URL.Path) - 1] != '/' {
extra_data = req.URL.Path[strings.LastIndexByte(req.URL.Path,'/') + 1:]
req.URL.Path = req.URL.Path[:strings.LastIndexByte(req.URL.Path,'/') + 1]
}
//fmt.Println("prefix:",prefix)
//fmt.Println("req.URL.Path:",req.URL.Path)
//fmt.Println("extra_data:",extra_data)
switch(prefix) {` + out + `
case "/uploads":
if extra_data == "" {
NotFound(w,req)
return
}
req.URL.Path += extra_data
router.UploadHandler(w,req)
return
case "":
default_route(w,req)
return
//default: NotFound(w,req)
}
// A fallback for the routes which haven't been converted to the new router yet
router.RLock()
handle, ok := router.old_routes[req.URL.Path]
router.RUnlock()
if ok {
req.URL.Path += extra_data
handle(w,req)
return
}
NotFound(w,req)
}
`
write_file("./gen_router.go",fdata)
fmt.Println("Successfully generated the router")
}
func write_file(name string, content string) {
f, err := os.Create(name)
if err != nil {
log.Fatal(err)
}
_, err = f.WriteString(content)
if err != nil {
log.Fatal(err)
}
f.Sync()
f.Close()
}