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server.go
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server.go
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package http200ok
import (
"fmt"
"github.com/julienschmidt/httprouter"
"log"
"net/http"
"sync"
)
type Handler func(c *Context)
type ErrorHandler func(http.ResponseWriter, *http.Request, error)
type method uint8
const (
delete method = iota + 1
get
head
post
put
)
func New() *Server {
return &Server{
router: httprouter.New(),
errorHandler: func(rw http.ResponseWriter, _ *http.Request, err error) {
http.Error(rw, http.StatusText(http.StatusInternalServerError), http.StatusInternalServerError)
log.Println(err)
},
notFoundHandler: func(rw http.ResponseWriter, req *http.Request) {
http.NotFound(rw, req)
},
methodNotAllowedHandler: func(rw http.ResponseWriter, _ *http.Request) {
http.Error(rw, http.StatusText(http.StatusMethodNotAllowed), http.StatusMethodNotAllowed)
},
}
}
type Server struct {
router *httprouter.Router
handlers []Handler
errorHandler ErrorHandler
notFoundHandler http.HandlerFunc
methodNotAllowedHandler http.HandlerFunc
}
func (s *Server) SetErrorHandler(handler ErrorHandler) {
s.errorHandler = handler
}
func (s *Server) SetNotFoundHandler(handler http.HandlerFunc) {
s.notFoundHandler = handler
}
func (s *Server) SetMethodNotAllowedHandler(handler http.HandlerFunc) {
s.methodNotAllowedHandler = handler
}
func (s *Server) Use(handler ...Handler) {
s.handlers = append(s.handlers, handler...)
}
func (s *Server) Delete(pattern string, handlers ...Handler) {
s.add(delete, pattern, handlers)
}
func (s *Server) Get(pattern string, handlers ...Handler) {
s.add(get, pattern, handlers)
}
func (s *Server) Head(pattern string, handlers ...Handler) {
s.add(head, pattern, handlers)
}
func (s *Server) Post(pattern string, handlers ...Handler) {
s.add(post, pattern, handlers)
}
func (s *Server) Put(pattern string, handlers ...Handler) {
s.add(put, pattern, handlers)
}
func (s *Server) WebSocket(pattern string, handlers ...Handler) {
i := len(handlers) - 1
s.add(get, pattern, append(handlers[:i], append([]Handler{wsMiddleware()}, handlers[i:]...)...))
}
func (s *Server) add(method method, pattern string, handlers []Handler) {
handler := func(rw http.ResponseWriter, req *http.Request, params httprouter.Params) {
c := Context{
mutex: sync.Mutex{},
Response: rw,
Request: req,
params: params,
handlers: append(s.handlers, handlers...),
values: make(map[string]interface{}),
}
c.run()
}
switch method {
case delete:
s.router.DELETE(pattern, handler)
case get:
s.router.GET(pattern, handler)
case head:
s.router.HEAD(pattern, handler)
case post:
s.router.POST(pattern, handler)
case put:
s.router.PUT(pattern, handler)
}
}
func (s *Server) ServeHTTP(rw http.ResponseWriter, req *http.Request) {
s.router.PanicHandler = func(rw http.ResponseWriter, req *http.Request, err interface{}) {
s.errorHandler(rw, req, fmt.Errorf("%v", err))
}
s.router.NotFound = s.notFoundHandler
s.router.MethodNotAllowed = s.methodNotAllowedHandler
s.router.ServeHTTP(rw, req)
}