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refactory: rebuild route tree

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This commit is contained in:
loveuer 2024-02-20 15:34:00 +08:00
parent 137d4ee5c8
commit 039f4cf8c0
19 changed files with 1738 additions and 324 deletions
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213
app.go
View File

@ -5,41 +5,61 @@ import (
"crypto/tls"
"errors"
"fmt"
"github.com/loveuer/nf/internal/bytesconv"
"io"
"log"
"net"
"net/http"
"strings"
"path"
"regexp"
)
var (
_ IRouter = (*App)(nil)
regSafePrefix = regexp.MustCompile("[^a-zA-Z0-9/-]+")
regRemoveRepeatedChar = regexp.MustCompile("/{2,}")
mimePlain = []string{"text/plain"}
)
type App struct {
*RouterGroup
RouterGroup
config *Config
router *router
groups []*RouterGroup
server *http.Server
trees methodTrees
maxParams uint16
maxSections uint16
redirectTrailingSlash bool // true
redirectFixedPath bool // false
handleMethodNotAllowed bool // false
useRawPath bool // false
unescapePathValues bool // true
removeExtraSlash bool // false
}
func (a *App) ServeHTTP(writer http.ResponseWriter, request *http.Request) {
c := newContext(a, writer, request)
var (
err error
c = newContext(a, writer, request)
nfe = new(Err)
)
for _, group := range a.groups {
if strings.HasPrefix(request.URL.Path, group.prefix) {
c.handlers = append(c.handlers, group.middlewares...)
}
if err = c.verify(); err != nil {
if errors.As(err, nfe) {
_ = c.Status(nfe.Status).SendString(nfe.Msg)
return
}
if err := a.router.handle(c); err != nil {
var ne = &Err{}
if errors.As(err, ne) {
writer.WriteHeader(ne.Status)
} else {
writer.WriteHeader(500)
_ = c.Status(500).SendString(err.Error())
return
}
_, _ = writer.Write([]byte(err.Error()))
}
a.handleHTTPRequest(c)
}
func (a *App) run(ln net.Listener) error {
@ -90,3 +110,162 @@ func (a *App) RunListener(ln net.Listener) error {
func (a *App) Shutdown(ctx context.Context) error {
return a.server.Shutdown(ctx)
}
func (a *App) addRoute(method, path string, handlers ...HandlerFunc) {
elsePanic(path[0] == '/', "path must begin with '/'")
elsePanic(method != "", "HTTP method can not be empty")
elsePanic(len(handlers) > 0, "without enable not implement, there must be at least one handler")
if !a.config.DisableMessagePrint {
fmt.Printf("[NF] Add Route: %-8s - %-25s (%2d handlers)\n", method, path, len(handlers))
}
root := a.trees.get(method)
if root == nil {
root = new(node)
root.fullPath = "/"
a.trees = append(a.trees, methodTree{method: method, root: root})
}
root.addRoute(path, handlers...)
if paramsCount := countParams(path); paramsCount > a.maxParams {
a.maxParams = paramsCount
}
if sectionsCount := countSections(path); sectionsCount > a.maxSections {
a.maxSections = sectionsCount
}
}
func (a *App) handleHTTPRequest(c *Ctx) {
httpMethod := c.Request.Method
rPath := c.Request.URL.Path
unescape := false
if a.useRawPath && len(c.Request.URL.RawPath) > 0 {
rPath = c.Request.URL.RawPath
unescape = a.unescapePathValues
}
if a.removeExtraSlash {
rPath = cleanPath(rPath)
}
// Find root of the tree for the given HTTP method
t := a.trees
for i, tl := 0, len(t); i < tl; i++ {
if t[i].method != httpMethod {
continue
}
root := t[i].root
// Find route in tree
value := root.getValue(rPath, c.params, c.skippedNodes, unescape)
if value.params != nil {
c.Params = *value.params
}
if value.handlers != nil {
c.handlers = value.handlers
c.fullPath = value.fullPath
// todo
c.Next()
c.writermem.WriteHeaderNow()
return
}
if httpMethod != http.MethodConnect && rPath != "/" {
if value.tsr && a.redirectTrailingSlash {
redirectTrailingSlash(c)
return
}
if a.redirectFixedPath && redirectFixedPath(c, root, a.redirectFixedPath) {
return
}
}
break
}
if a.handleMethodNotAllowed {
// According to RFC 7231 section 6.5.5, MUST generate an Allow header field in response
// containing a list of the target resource's currently supported methods.
allowed := make([]string, 0, len(t)-1)
for _, tree := range a.trees {
if tree.method == httpMethod {
continue
}
if value := tree.root.getValue(rPath, nil, c.skippedNodes, unescape); value.handlers != nil {
allowed = append(allowed, tree.method)
}
}
if len(allowed) > 0 {
c.handlers = a.combineHandlers()
serveError(c, a.config.MethodNotAllowedHandler)
return
}
}
c.handlers = a.combineHandlers()
serveError(c, a.config.NotFoundHandler)
}
func errorHandler(c *Ctx) {
_ = c.Status(500).SendString(_500)
}
func serveError(c *Ctx, handler HandlerFunc) {
err := c.Next()
if c.writermem.Written() {
return
}
_ = handler(c)
_ = err
}
func redirectTrailingSlash(c *Ctx) {
req := c.Request
p := req.URL.Path
if prefix := path.Clean(c.Request.Header.Get("X-Forwarded-Prefix")); prefix != "." {
prefix = regSafePrefix.ReplaceAllString(prefix, "")
prefix = regRemoveRepeatedChar.ReplaceAllString(prefix, "/")
p = prefix + "/" + req.URL.Path
}
req.URL.Path = p + "/"
if length := len(p); length > 1 && p[length-1] == '/' {
req.URL.Path = p[:length-1]
}
redirectRequest(c)
}
func redirectFixedPath(c *Ctx, root *node, trailingSlash bool) bool {
req := c.Request
rPath := req.URL.Path
if fixedPath, ok := root.findCaseInsensitivePath(cleanPath(rPath), trailingSlash); ok {
req.URL.Path = bytesconv.BytesToString(fixedPath)
redirectRequest(c)
return true
}
return false
}
func redirectRequest(c *Ctx) {
req := c.Request
//rPath := req.URL.Path
rURL := req.URL.String()
code := http.StatusMovedPermanently // Permanent redirect, request with GET method
if req.Method != http.MethodGet {
code = http.StatusTemporaryRedirect
}
//debugPrint("redirecting request %d: %s --> %s", code, rPath, rURL)
http.Redirect(c.writer, req, rURL, code)
c.writermem.WriteHeaderNow()
}

63
ctx.go
View File

@ -12,35 +12,54 @@ import (
)
type Ctx struct {
writermem responseWriter
// origin objects
writer http.ResponseWriter
Request *http.Request
// request info
path string
Method string
method string
// response info
StatusCode int
app *App
params map[string]string
params *Params
index int
handlers []HandlerFunc
locals map[string]interface{}
skippedNodes *[]skippedNode
fullPath string
Params Params
}
func newContext(app *App, writer http.ResponseWriter, request *http.Request) *Ctx {
return &Ctx{
skippedNodes := make([]skippedNode, 0, app.maxSections)
v := make(Params, 0, app.maxParams)
ctx := &Ctx{
writer: writer,
writermem: responseWriter{},
Request: request,
path: request.URL.Path,
Method: request.Method,
method: request.Method,
StatusCode: 200,
app: app,
index: -1,
locals: map[string]interface{}{},
handlers: make([]HandlerFunc, 0),
skippedNodes: &skippedNodes,
params: &v,
}
ctx.writermem = responseWriter{
ResponseWriter: ctx.writer,
size: -1,
status: 0,
}
return ctx
}
func (c *Ctx) Locals(key string, value ...interface{}) interface{} {
@ -52,6 +71,16 @@ func (c *Ctx) Locals(key string, value ...interface{}) interface{} {
return data
}
func (c *Ctx) Method(overWrite ...string) string {
method := c.Request.Method
if len(overWrite) > 0 && overWrite[0] != "" {
c.Request.Method = overWrite[0]
}
return method
}
func (c *Ctx) Path(overWrite ...string) string {
path := c.Request.URL.Path
if len(overWrite) > 0 && overWrite[0] != "" {
@ -83,11 +112,17 @@ func (c *Ctx) Next() error {
var err error
if c.index < len(c.handlers) {
err = c.handlers[c.index](c)
for c.index < len(c.handlers) {
if c.handlers[c.index] != nil {
if err = c.handlers[c.index](c); err != nil {
return err
}
}
return err
c.index++
}
return nil
}
/* ===============================================================
@ -104,7 +139,7 @@ func (c *Ctx) verify() error {
}
func (c *Ctx) Param(key string) string {
return c.params[key]
return c.Params.ByName(key)
}
func (c *Ctx) Form(key string) string {
@ -196,17 +231,17 @@ func (c *Ctx) QueryParser(out interface{}) error {
=============================================================== */
func (c *Ctx) Status(code int) *Ctx {
c.StatusCode = code
c.writer.WriteHeader(code)
c.writermem.WriteHeader(code)
c.StatusCode = c.writermem.status
return c
}
func (c *Ctx) Set(key string, value string) {
c.writer.Header().Set(key, value)
c.writermem.Header().Set(key, value)
}
func (c *Ctx) SetHeader(key string, value string) {
c.writer.Header().Set(key, value)
c.writermem.Header().Set(key, value)
}
func (c *Ctx) SendString(data string) error {
@ -223,7 +258,7 @@ func (c *Ctx) Writef(format string, values ...interface{}) (int, error) {
func (c *Ctx) JSON(data interface{}) error {
c.SetHeader("Content-Type", MIMEApplicationJSON)
encoder := json.NewEncoder(c.writer)
encoder := json.NewEncoder(&c.writermem)
if err := encoder.Encode(data); err != nil {
return err
@ -237,7 +272,7 @@ func (c *Ctx) RawWriter() http.ResponseWriter {
}
func (c *Ctx) Write(data []byte) (int, error) {
return c.writer.Write(data)
return c.writermem.Write(data)
}
func (c *Ctx) HTML(html string) error {

80
group.go
View File

@ -1,80 +0,0 @@
package nf
import (
"fmt"
"log"
"net/http"
)
type RouterGroup struct {
prefix string
middlewares []HandlerFunc // support middleware
parent *RouterGroup // support nesting
app *App // all groups share a Engine instance
}
// Group is defined to create a new RouterGroup
// remember all groups share the same Engine instance
func (group *RouterGroup) Group(prefix string) *RouterGroup {
app := group.app
newGroup := &RouterGroup{
prefix: group.prefix + prefix,
parent: group,
app: app,
}
app.groups = append(app.groups, newGroup)
return newGroup
}
func (group *RouterGroup) verifyHandlers(path string, handlers ...HandlerFunc) []HandlerFunc {
if len(handlers) == 0 {
if !group.app.config.EnableNotImplementHandler {
panic(fmt.Sprintf("missing handler in route: %s", path))
}
handlers = append(handlers, ToDoHandler)
}
for _, handler := range handlers {
if handler == nil {
panic(fmt.Sprintf("nil handler found in route: %s", path))
}
}
return handlers
}
func (group *RouterGroup) addRoute(method string, comp string, handlers ...HandlerFunc) {
handlers = group.verifyHandlers(comp, handlers...)
pattern := group.prefix + comp
log.Printf("Add Route %4s - %s", method, pattern)
group.app.router.addRoute(method, pattern, handlers...)
}
func (group *RouterGroup) Get(pattern string, handlers ...HandlerFunc) {
group.addRoute(http.MethodGet, pattern, handlers...)
}
func (group *RouterGroup) Post(pattern string, handlers ...HandlerFunc) {
group.addRoute(http.MethodPost, pattern, handlers...)
}
func (group *RouterGroup) Put(pattern string, handlers ...HandlerFunc) {
group.addRoute(http.MethodPut, pattern, handlers...)
}
func (group *RouterGroup) Delete(pattern string, handlers ...HandlerFunc) {
group.addRoute(http.MethodDelete, pattern, handlers...)
}
func (group *RouterGroup) Patch(pattern string, handlers ...HandlerFunc) {
group.addRoute(http.MethodPatch, pattern, handlers...)
}
func (group *RouterGroup) Head(pattern string, handlers ...HandlerFunc) {
group.addRoute(http.MethodHead, pattern, handlers...)
}
func (group *RouterGroup) Use(middlewares ...HandlerFunc) {
group.middlewares = append(group.middlewares, middlewares...)
}

2
handler.go
View File

@ -5,5 +5,5 @@ import "fmt"
type HandlerFunc func(*Ctx) error
func ToDoHandler(c *Ctx) error {
return c.Status(501).SendString(fmt.Sprintf("%s - %s Not Implemented", c.Method, c.Path()))
return c.Status(501).SendString(fmt.Sprintf("%s - %s Not Implemented", c.Method(), c.Path()))
}

26
internal/bytesconv/bytesconv_1.19.go Normal file
View File

@ -0,0 +1,26 @@
// Copyright 2020 Gin Core Team. All rights reserved.
// Use of this source code is governed by a MIT style
// license that can be found in the LICENSE file.
//go:build !go1.20
package bytesconv
import (
"unsafe"
)
// StringToBytes converts string to byte slice without a memory allocation.
func StringToBytes(s string) []byte {
return *(*[]byte)(unsafe.Pointer(
&struct {
string
Cap int
}{s, len(s)},
))
}
// BytesToString converts byte slice to string without a memory allocation.
func BytesToString(b []byte) string {
return *(*string)(unsafe.Pointer(&b))
}

23
internal/bytesconv/bytesconv_1.20.go Normal file
View File

@ -0,0 +1,23 @@
// Copyright 2023 Gin Core Team. All rights reserved.
// Use of this source code is governed by a MIT style
// license that can be found in the LICENSE file.
//go:build go1.20
package bytesconv
import (
"unsafe"
)
// StringToBytes converts string to byte slice without a memory allocation.
// For more details, see https://github.com/golang/go/issues/53003#issuecomment-1140276077.
func StringToBytes(s string) []byte {
return unsafe.Slice(unsafe.StringData(s), len(s))
}
// BytesToString converts byte slice to string without a memory allocation.
// For more details, see https://github.com/golang/go/issues/53003#issuecomment-1140276077.
func BytesToString(b []byte) string {
return unsafe.String(unsafe.SliceData(b), len(b))
}

99
internal/bytesconv/bytesconv_test.go Normal file
View File

@ -0,0 +1,99 @@
// Copyright 2020 Gin Core Team. All rights reserved.
// Use of this source code is governed by a MIT style
// license that can be found in the LICENSE file.
package bytesconv
import (
"bytes"
"math/rand"
"strings"
"testing"
"time"
)
var testString = "Albert Einstein: Logic will get you from A to B. Imagination will take you everywhere."
var testBytes = []byte(testString)
func rawBytesToStr(b []byte) string {
return string(b)
}
func rawStrToBytes(s string) []byte {
return []byte(s)
}
// go test -v
func TestBytesToString(t *testing.T) {
data := make([]byte, 1024)
for i := 0; i < 100; i++ {
rand.Read(data)
if rawBytesToStr(data) != BytesToString(data) {
t.Fatal("don't match")
}
}
}
const letterBytes = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
const (
letterIdxBits = 6 // 6 bits to represent a letter index
letterIdxMask = 1<<letterIdxBits - 1 // All 1-bits, as many as letterIdxBits
letterIdxMax = 63 / letterIdxBits // # of letter indices fitting in 63 bits
)
var src = rand.NewSource(time.Now().UnixNano())
func RandStringBytesMaskImprSrcSB(n int) string {
sb := strings.Builder{}
sb.Grow(n)
// A src.Int63() generates 63 random bits, enough for letterIdxMax characters!
for i, cache, remain := n-1, src.Int63(), letterIdxMax; i >= 0; {
if remain == 0 {
cache, remain = src.Int63(), letterIdxMax
}
if idx := int(cache & letterIdxMask); idx < len(letterBytes) {
sb.WriteByte(letterBytes[idx])
i--
}
cache >>= letterIdxBits
remain--
}
return sb.String()
}
func TestStringToBytes(t *testing.T) {
for i := 0; i < 100; i++ {
s := RandStringBytesMaskImprSrcSB(64)
if !bytes.Equal(rawStrToBytes(s), StringToBytes(s)) {
t.Fatal("don't match")
}
}
}
// go test -v -run=none -bench=^BenchmarkBytesConv -benchmem=true
func BenchmarkBytesConvBytesToStrRaw(b *testing.B) {
for i := 0; i < b.N; i++ {
rawBytesToStr(testBytes)
}
}
func BenchmarkBytesConvBytesToStr(b *testing.B) {
for i := 0; i < b.N; i++ {
BytesToString(testBytes)
}
}
func BenchmarkBytesConvStrToBytesRaw(b *testing.B) {
for i := 0; i < b.N; i++ {
rawStrToBytes(testString)
}
}
func BenchmarkBytesConvStrToBytes(b *testing.B) {
for i := 0; i < b.N; i++ {
StringToBytes(testString)
}
}

5
middleware.go
View File

@ -17,6 +17,9 @@ func NewRecover(enableStackTrace bool) HandlerFunc {
} else {
os.Stderr.WriteString(fmt.Sprintf("recovered from panic: %v\n", r))
}
//serveError(c, 500, []byte(fmt.Sprint(r)))
_ = c.Status(500).SendString(fmt.Sprint(r))
}
}()
@ -47,7 +50,7 @@ func NewLogger() HandlerFunc {
unit = "s"
}
return fmt.Sprintf("%v %s", num, unit)
return fmt.Sprintf("%3d %2s", num, unit)
}
return func(c *Ctx) error {

32
nf.go
View File

@ -3,11 +3,14 @@ package nf
const (
banner = " _ _ _ ___ _ \n | \\| |___| |_ | __|__ _ _ _ _ __| |\n | .` / _ \\ _| | _/ _ \\ || | ' \\/ _` |\n |_|\\_\\___/\\__| |_|\\___/\\_,_|_||_\\__,_|\n "
_404 = "<!doctype html><html lang=\"en\"><head><meta charset=\"UTF-8\"><meta name=\"viewport\" content=\"width=device-width,user-scalable=no,initial-scale=1,maximum-scale=1,minimum-scale=1\"><meta http-equiv=\"X-UA-Compatible\" content=\"ie=edge\"><title>Not Found</title><style>body{background:#333;margin:0;color:#ccc;display:flex;align-items:center;max-height:100vh;height:100vh;justify-content:center}textarea{min-height:5rem;min-width:20rem;text-align:center;border:none;background:0 0;color:#ccc;resize:none;user-input:none;user-select:none;cursor:default;-webkit-user-select:none;-webkit-touch-callout:none;-moz-user-select:none;-ms-user-select:none;outline:0}</style></head><body><textarea id=\"banner\" readonly=\"readonly\"></textarea><script type=\"text/javascript\">let htmlCodes = [\n ' _ _ _ ___ _ ',\n '| \\\\| |___| |_ | __|__ _ _ _ _ __| |',\n '| .` / _ \\\\ _| | _/ _ \\\\ || | \\' \\\\/ _` |',\n '|_|\\\\_\\\\___/\\\\__| |_|\\\\___/\\\\_,_|_||_\\\\__,_|'\n].join('\\n');\ndocument.querySelector('#banner').value = htmlCodes</script></body></html>"
_405 = `405 Method Not Allowed`
_500 = `500 Internal Server Error`
)
type Map map[string]interface{}
type Config struct {
DisableMessagePrint bool `json:"-"`
// Default: 4 * 1024 * 1024
BodyLimit int64 `json:"-"`
@ -19,8 +22,9 @@ type Config struct {
DisableRecover bool `json:"-"`
DisableHttpErrorLog bool `json:"-"`
EnableNotImplementHandler bool `json:"-"`
//EnableNotImplementHandler bool `json:"-"`
NotFoundHandler HandlerFunc `json:"-"`
MethodNotAllowedHandler HandlerFunc `json:"-"`
}
var (
@ -31,16 +35,33 @@ var (
_, err := c.Status(404).Write([]byte(_404))
return err
},
MethodNotAllowedHandler: func(c *Ctx) error {
c.Set("Content-Type", MIMETextPlain)
_, err := c.Status(405).Write([]byte(_405))
return err
},
}
)
func New(config ...Config) *App {
app := &App{
router: newRouter(),
RouterGroup: RouterGroup{
Handlers: nil,
basePath: "/",
root: true,
},
redirectTrailingSlash: true, // true
redirectFixedPath: false, // false
handleMethodNotAllowed: true, // false
useRawPath: false, // false
unescapePathValues: true, // true
removeExtraSlash: false, // false
}
if len(config) > 0 {
app.config = &config[0]
if app.config.BodyLimit == 0 {
app.config.BodyLimit = defaultConfig.BodyLimit
}
@ -49,12 +70,15 @@ func New(config ...Config) *App {
app.config.NotFoundHandler = defaultConfig.NotFoundHandler
}
if app.config.MethodNotAllowedHandler == nil {
app.config.MethodNotAllowedHandler = defaultConfig.MethodNotAllowedHandler
}
} else {
app.config = defaultConfig
}
app.RouterGroup = &RouterGroup{app: app, prefix: ""}
app.groups = []*RouterGroup{app.RouterGroup}
app.RouterGroup.app = app
if !app.config.DisableLogger {
app.Use(NewLogger())

132
response_writer.go Normal file
View File

@ -0,0 +1,132 @@
package nf
import (
"bufio"
"io"
"net"
"net/http"
)
const (
noWritten = -1
defaultStatus = http.StatusOK
)
// ResponseWriter ...
type ResponseWriter interface {
http.ResponseWriter
http.Hijacker
http.Flusher
http.CloseNotifier
// Status returns the HTTP response status code of the current request.
Status() int
// Size returns the number of bytes already written into the response http body.
// See Written()
Size() int
// WriteString writes the string into the response body.
WriteString(string) (int, error)
// Written returns true if the response body was already written.
Written() bool
// WriteHeaderNow forces to write the http header (status code + headers).
WriteHeaderNow()
// Pusher get the http.Pusher for server push
Pusher() http.Pusher
}
type responseWriter struct {
http.ResponseWriter
size int
status int
}
var _ ResponseWriter = (*responseWriter)(nil)
func (w *responseWriter) Unwrap() http.ResponseWriter {
return w.ResponseWriter
}
func (w *responseWriter) reset(writer http.ResponseWriter) {
w.ResponseWriter = writer
w.size = noWritten
w.status = defaultStatus
}
func (w *responseWriter) WriteHeader(code int) {
if code > 0 && w.status != code {
if w.Written() {
// todo: debugPrint("[WARNING] Headers were already written. Wanted to override status code %d with %d", w.status, code)
return
}
w.status = code
}
}
func (w *responseWriter) WriteHeaderNow() {
if !w.Written() {
w.size = 0
if w.status == 0 {
w.status = 200
}
w.ResponseWriter.WriteHeader(w.status)
}
}
func (w *responseWriter) Write(data []byte) (n int, err error) {
w.WriteHeaderNow()
n, err = w.ResponseWriter.Write(data)
w.size += n
return
}
func (w *responseWriter) WriteString(s string) (n int, err error) {
w.WriteHeaderNow()
n, err = io.WriteString(w.ResponseWriter, s)
w.size += n
return
}
func (w *responseWriter) Status() int {
return w.status
}
func (w *responseWriter) Size() int {
return w.size
}
func (w *responseWriter) Written() bool {
return w.size != noWritten
}
// Hijack implements the http.Hijacker interface.
func (w *responseWriter) Hijack() (net.Conn, *bufio.ReadWriter, error) {
if w.size < 0 {
w.size = 0
}
return w.ResponseWriter.(http.Hijacker).Hijack()
}
// CloseNotify implements the http.CloseNotifier interface.
func (w *responseWriter) CloseNotify() <-chan bool {
return w.ResponseWriter.(http.CloseNotifier).CloseNotify()
}
// Flush implements the http.Flusher interface.
func (w *responseWriter) Flush() {
w.WriteHeaderNow()
w.ResponseWriter.(http.Flusher).Flush()
}
func (w *responseWriter) Pusher() (pusher http.Pusher) {
if pusher, ok := w.ResponseWriter.(http.Pusher); ok {
return pusher
}
return nil
}

100
router.go
View File

@ -1,100 +0,0 @@
package nf
import "strings"
type router struct {
roots map[string]*_node
handlers map[string][]HandlerFunc
}
func newRouter() *router {
return &router{
roots: make(map[string]*_node),
handlers: make(map[string][]HandlerFunc),
}
}
// Only one * is allowed
func parsePattern(pattern string) []string {
vs := strings.Split(pattern, "/")
parts := make([]string, 0)
for _, item := range vs {
if item != "" {
parts = append(parts, item)
if item[0] == '*' {
break
}
}
}
return parts
}
func (r *router) addRoute(method string, pattern string, handlers ...HandlerFunc) {
parts := parsePattern(pattern)
key := method + "-" + pattern
_, ok := r.roots[method]
if !ok {
r.roots[method] = &_node{}
}
r.roots[method].insert(pattern, parts, 0)
r.handlers[key] = handlers
}
func (r *router) getRoute(method string, path string) (*_node, map[string]string) {
searchParts := parsePattern(path)
params := make(map[string]string)
root, ok := r.roots[method]
if !ok {
return &_node{}, nil
}
n := root.search(searchParts, 0)
if n != nil {
parts := parsePattern(n.pattern)
for index, part := range parts {
if part[0] == ':' {
params[part[1:]] = searchParts[index]
}
if part[0] == '*' && len(part) > 1 {
params[part[1:]] = strings.Join(searchParts[index:], "/")
break
}
}
return n, params
}
return root, nil
}
func (r *router) getRoutes(method string) []*_node {
root, ok := r.roots[method]
if !ok {
return nil
}
nodes := make([]*_node, 0)
root.travel(&nodes)
return nodes
}
func (r *router) handle(c *Ctx) error {
if err := c.verify(); err != nil {
return err
}
node, params := r.getRoute(c.Method, c.path)
if node != nil {
c.params = params
key := c.Method + "-" + node.pattern
c.handlers = append(c.handlers, r.handlers[key]...)
//c.handlers = append(r.handlers[key], c.handlers...)
} else {
return c.app.config.NotFoundHandler(c)
}
return c.Next()
}

155
routergroup.go Normal file
View File

@ -0,0 +1,155 @@
package nf
import (
"math"
"net/http"
"path"
"regexp"
)
var (
// regEnLetter matches english letters for http method name
regEnLetter = regexp.MustCompile("^[A-Z]+$")
// anyMethods for RouterGroup Any method
anyMethods = []string{
http.MethodGet, http.MethodPost, http.MethodPut, http.MethodPatch,
http.MethodHead, http.MethodOptions, http.MethodDelete, http.MethodConnect,
http.MethodTrace,
}
)
// IRouter defines all router handle interface includes single and group router.
type IRouter interface {
IRoutes
Group(string, ...HandlerFunc) *RouterGroup
}
// IRoutes defines all router handle interface.
type IRoutes interface {
Use(...HandlerFunc) IRoutes
Handle(string, string, ...HandlerFunc) IRoutes
Any(string, ...HandlerFunc) IRoutes
Get(string, ...HandlerFunc) IRoutes
Post(string, ...HandlerFunc) IRoutes
Delete(string, ...HandlerFunc) IRoutes
Patch(string, ...HandlerFunc) IRoutes
Put(string, ...HandlerFunc) IRoutes
Options(string, ...HandlerFunc) IRoutes
Head(string, ...HandlerFunc) IRoutes
Match([]string, string, ...HandlerFunc) IRoutes
//StaticFile(string, string) IRoutes
//StaticFileFS(string, string, http.FileSystem) IRoutes
//Static(string, string) IRoutes
//StaticFS(string, http.FileSystem) IRoutes
}
type RouterGroup struct {
Handlers []HandlerFunc
basePath string
app *App
root bool
}
var _ IRouter = (*RouterGroup)(nil)
func (group *RouterGroup) Use(middleware ...HandlerFunc) IRoutes {
group.Handlers = append(group.Handlers, middleware...)
return group.returnObj()
}
func (group *RouterGroup) Group(relativePath string, handlers ...HandlerFunc) *RouterGroup {
return &RouterGroup{
Handlers: group.combineHandlers(handlers...),
basePath: group.calculateAbsolutePath(relativePath),
app: group.app,
}
}
func (group *RouterGroup) BasePath() string {
return group.basePath
}
func (group *RouterGroup) handle(httpMethod, relativePath string, handlers ...HandlerFunc) IRoutes {
absolutePath := group.calculateAbsolutePath(relativePath)
handlers = group.combineHandlers(handlers...)
group.app.addRoute(httpMethod, absolutePath, handlers...)
return group.returnObj()
}
func (group *RouterGroup) Handle(httpMethod, relativePath string, handlers ...HandlerFunc) IRoutes {
if matched := regEnLetter.MatchString(httpMethod); !matched {
panic("http method " + httpMethod + " is not valid")
}
return group.handle(httpMethod, relativePath, handlers...)
}
func (group *RouterGroup) Post(relativePath string, handlers ...HandlerFunc) IRoutes {
return group.handle(http.MethodPost, relativePath, handlers...)
}
func (group *RouterGroup) Get(relativePath string, handlers ...HandlerFunc) IRoutes {
return group.handle(http.MethodGet, relativePath, handlers...)
}
func (group *RouterGroup) Delete(relativePath string, handlers ...HandlerFunc) IRoutes {
return group.handle(http.MethodDelete, relativePath, handlers...)
}
func (group *RouterGroup) Patch(relativePath string, handlers ...HandlerFunc) IRoutes {
return group.handle(http.MethodPatch, relativePath, handlers...)
}
func (group *RouterGroup) Put(relativePath string, handlers ...HandlerFunc) IRoutes {
return group.handle(http.MethodPut, relativePath, handlers...)
}
func (group *RouterGroup) Options(relativePath string, handlers ...HandlerFunc) IRoutes {
return group.handle(http.MethodOptions, relativePath, handlers...)
}
func (group *RouterGroup) Head(relativePath string, handlers ...HandlerFunc) IRoutes {
return group.handle(http.MethodHead, relativePath, handlers...)
}
// Any registers a route that matches all the HTTP methods.
// GET, POST, PUT, PATCH, HEAD, OPTIONS, DELETE, CONNECT, TRACE.
func (group *RouterGroup) Any(relativePath string, handlers ...HandlerFunc) IRoutes {
for _, method := range anyMethods {
group.handle(method, relativePath, handlers...)
}
return group.returnObj()
}
func (group *RouterGroup) Match(methods []string, relativePath string, handlers ...HandlerFunc) IRoutes {
for _, method := range methods {
group.handle(method, relativePath, handlers...)
}
return group.returnObj()
}
const abortIndex int8 = math.MaxInt8 >> 1
func (group *RouterGroup) combineHandlers(handlers ...HandlerFunc) []HandlerFunc {
finalSize := len(group.Handlers) + len(handlers)
elsePanic(finalSize < int(abortIndex), "too many handlers")
mergedHandlers := make([]HandlerFunc, finalSize)
copy(mergedHandlers, group.Handlers)
copy(mergedHandlers[len(group.Handlers):], handlers)
return mergedHandlers
}
func (group *RouterGroup) calculateAbsolutePath(relativePath string) string {
return path.Join(group.basePath, relativePath)
}
func (group *RouterGroup) returnObj() IRoutes {
if group.root {
return group.app
}
return group
}

903
tree.go
View File

@ -1,76 +1,891 @@
package nf
import (
"bytes"
"net/url"
"strings"
"unicode"
"unicode/utf8"
"github.com/loveuer/nf/internal/bytesconv"
)
type _node struct {
pattern string
part string
children []*_node
isWild bool
var (
strColon = []byte(":")
strStar = []byte("*")
strSlash = []byte("/")
)
// Param is a single URL parameter, consisting of a key and a value.
type Param struct {
Key string
Value string
}
func (n *_node) insert(pattern string, parts []string, height int) {
if len(parts) == height {
n.pattern = pattern
// Params is a Param-slice, as returned by the router.
// The slice is ordered, the first URL parameter is also the first slice value.
// It is therefore safe to read values by the index.
type Params []Param
// Get returns the value of the first Param which key matches the given name and a boolean true.
// If no matching Param is found, an empty string is returned and a boolean false .
func (ps Params) Get(name string) (string, bool) {
for _, entry := range ps {
if entry.Key == name {
return entry.Value, true
}
}
return "", false
}
// ByName returns the value of the first Param which key matches the given name.
// If no matching Param is found, an empty string is returned.
func (ps Params) ByName(name string) (va string) {
va, _ = ps.Get(name)
return
}
part := parts[height]
child := n.matchChild(part)
if child == nil {
child = &_node{part: part, isWild: part[0] == ':' || part[0] == '*'}
n.children = append(n.children, child)
}
child.insert(pattern, parts, height+1)
type methodTree struct {
method string
root *node
}
func (n *_node) search(parts []string, height int) *_node {
if len(parts) == height || strings.HasPrefix(n.part, "*") {
if n.pattern == "" {
type methodTrees []methodTree
func (trees methodTrees) get(method string) *node {
for _, tree := range trees {
if tree.method == method {
return tree.root
}
}
return nil
}
func min(a, b int) int {
if a <= b {
return a
}
return b
}
func longestCommonPrefix(a, b string) int {
i := 0
max := min(len(a), len(b))
for i < max && a[i] == b[i] {
i++
}
return i
}
// addChild will add a child node, keeping wildcardChild at the end
func (n *node) addChild(child *node) {
if n.wildChild && len(n.children) > 0 {
wildcardChild := n.children[len(n.children)-1]
n.children = append(n.children[:len(n.children)-1], child, wildcardChild)
} else {
n.children = append(n.children, child)
}
}
func countParams(path string) uint16 {
var n uint16
s := bytesconv.StringToBytes(path)
n += uint16(bytes.Count(s, strColon))
n += uint16(bytes.Count(s, strStar))
return n
}
part := parts[height]
children := n.matchChildren(part)
func countSections(path string) uint16 {
s := bytesconv.StringToBytes(path)
return uint16(bytes.Count(s, strSlash))
}
for _, child := range children {
result := child.search(parts, height+1)
if result != nil {
return result
type nodeType uint8
const (
static nodeType = iota
root
param
catchAll
)
type node struct {
path string
indices string
wildChild bool
nType nodeType
priority uint32
children []*node // child nodes, at most 1 :param style node at the end of the array
handlers []HandlerFunc
fullPath string
}
// Increments priority of the given child and reorders if necessary
func (n *node) incrementChildPrio(pos int) int {
cs := n.children
cs[pos].priority++
prio := cs[pos].priority
// Adjust position (move to front)
newPos := pos
for ; newPos > 0 && cs[newPos-1].priority < prio; newPos-- {
// Swap node positions
cs[newPos-1], cs[newPos] = cs[newPos], cs[newPos-1]
}
// Build new index char string
if newPos != pos {
n.indices = n.indices[:newPos] + // Unchanged prefix, might be empty
n.indices[pos:pos+1] + // The index char we move
n.indices[newPos:pos] + n.indices[pos+1:] // Rest without char at 'pos'
}
return newPos
}
// addRoute adds a node with the given handle to the path.
// Not concurrency-safe!
func (n *node) addRoute(path string, handlers ...HandlerFunc) {
fullPath := path
n.priority++
// Empty tree
if len(n.path) == 0 && len(n.children) == 0 {
n.insertChild(path, fullPath, handlers...)
n.nType = root
return
}
parentFullPathIndex := 0
walk:
for {
// Find the longest common prefix.
// This also implies that the common prefix contains no ':' or '*'
// since the existing key can't contain those chars.
i := longestCommonPrefix(path, n.path)
// Split edge
if i < len(n.path) {
child := node{
path: n.path[i:],
wildChild: n.wildChild,
nType: static,
indices: n.indices,
children: n.children,
handlers: n.handlers,
priority: n.priority - 1,
fullPath: n.fullPath,
}
n.children = []*node{&child}
// []byte for proper unicode char conversion, see #65
n.indices = bytesconv.BytesToString([]byte{n.path[i]})
n.path = path[:i]
n.handlers = nil
n.wildChild = false
n.fullPath = fullPath[:parentFullPathIndex+i]
}
// Make new node a child of this node
if i < len(path) {
path = path[i:]
c := path[0]
// '/' after param
if n.nType == param && c == '/' && len(n.children) == 1 {
parentFullPathIndex += len(n.path)
n = n.children[0]
n.priority++
continue walk
}
// Check if a child with the next path byte exists
for i, max := 0, len(n.indices); i < max; i++ {
if c == n.indices[i] {
parentFullPathIndex += len(n.path)
i = n.incrementChildPrio(i)
n = n.children[i]
continue walk
}
}
// Otherwise insert it
if c != ':' && c != '*' && n.nType != catchAll {
// []byte for proper unicode char conversion, see #65
n.indices += bytesconv.BytesToString([]byte{c})
child := &node{
fullPath: fullPath,
}
n.addChild(child)
n.incrementChildPrio(len(n.indices) - 1)
n = child
} else if n.wildChild {
// inserting a wildcard node, need to check if it conflicts with the existing wildcard
n = n.children[len(n.children)-1]
n.priority++
// Check if the wildcard matches
if len(path) >= len(n.path) && n.path == path[:len(n.path)] &&
// Adding a child to a catchAll is not possible
n.nType != catchAll &&
// Check for longer wildcard, e.g. :name and :names
(len(n.path) >= len(path) || path[len(n.path)] == '/') {
continue walk
}
// Wildcard conflict
pathSeg := path
if n.nType != catchAll {
pathSeg = strings.SplitN(pathSeg, "/", 2)[0]
}
prefix := fullPath[:strings.Index(fullPath, pathSeg)] + n.path
panic("'" + pathSeg +
"' in new path '" + fullPath +
"' conflicts with existing wildcard '" + n.path +
"' in existing prefix '" + prefix +
"'")
}
n.insertChild(path, fullPath, handlers...)
return
}
// Otherwise add handle to current node
if n.handlers != nil {
panic("handlers are already registered for path '" + fullPath + "'")
}
n.handlers = handlers
n.fullPath = fullPath
return
}
}
// Search for a wildcard segment and check the name for invalid characters.
// Returns -1 as index, if no wildcard was found.
func findWildcard(path string) (wildcard string, i int, valid bool) {
// Find start
for start, c := range []byte(path) {
// A wildcard starts with ':' (param) or '*' (catch-all)
if c != ':' && c != '*' {
continue
}
// Find end and check for invalid characters
valid = true
for end, c := range []byte(path[start+1:]) {
switch c {
case '/':
return path[start : start+1+end], start, valid
case ':', '*':
valid = false
}
}
return path[start:], start, valid
}
return "", -1, false
}
func (n *node) insertChild(path string, fullPath string, handlers ...HandlerFunc) {
for {
// Find prefix until first wildcard
wildcard, i, valid := findWildcard(path)
if i < 0 { // No wildcard found
break
}
// The wildcard name must only contain one ':' or '*' character
if !valid {
panic("only one wildcard per path segment is allowed, has: '" +
wildcard + "' in path '" + fullPath + "'")
}
// check if the wildcard has a name
if len(wildcard) < 2 {
panic("wildcards must be named with a non-empty name in path '" + fullPath + "'")
}
if wildcard[0] == ':' { // param
if i > 0 {
// Insert prefix before the current wildcard
n.path = path[:i]
path = path[i:]
}
child := &node{
nType: param,
path: wildcard,
fullPath: fullPath,
}
n.addChild(child)
n.wildChild = true
n = child
n.priority++
// if the path doesn't end with the wildcard, then there
// will be another subpath starting with '/'
if len(wildcard) < len(path) {
path = path[len(wildcard):]
child := &node{
priority: 1,
fullPath: fullPath,
}
n.addChild(child)
n = child
continue
}
// Otherwise we're done. Insert the handle in the new leaf
n.handlers = handlers
return
}
// catchAll
if i+len(wildcard) != len(path) {
panic("catch-all routes are only allowed at the end of the path in path '" + fullPath + "'")
}
if len(n.path) > 0 && n.path[len(n.path)-1] == '/' {
pathSeg := ""
if len(n.children) != 0 {
pathSeg = strings.SplitN(n.children[0].path, "/", 2)[0]
}
panic("catch-all wildcard '" + path +
"' in new path '" + fullPath +
"' conflicts with existing path segment '" + pathSeg +
"' in existing prefix '" + n.path + pathSeg +
"'")
}
// currently fixed width 1 for '/'
i--
if path[i] != '/' {
panic("no / before catch-all in path '" + fullPath + "'")
}
n.path = path[:i]
// First node: catchAll node with empty path
child := &node{
wildChild: true,
nType: catchAll,
fullPath: fullPath,
}
n.addChild(child)
n.indices = string('/')
n = child
n.priority++
// second node: node holding the variable
child = &node{
path: path[i:],
nType: catchAll,
handlers: handlers,
priority: 1,
fullPath: fullPath,
}
n.children = []*node{child}
return
}
// If no wildcard was found, simply insert the path and handle
n.path = path
n.handlers = handlers
n.fullPath = fullPath
}
// nodeValue holds return values of (*Node).getValue method
type nodeValue struct {
handlers []HandlerFunc
params *Params
tsr bool
fullPath string
}
type skippedNode struct {
path string
node *node
paramsCount int16
}
// Returns the handle registered with the given path (key). The values of
// wildcards are saved to a map.
// If no handle can be found, a TSR (trailing slash redirect) recommendation is
// made if a handle exists with an extra (without the) trailing slash for the
// given path.
func (n *node) getValue(path string, params *Params, skippedNodes *[]skippedNode, unescape bool) (value nodeValue) {
var globalParamsCount int16
walk: // Outer loop for walking the tree
for {
prefix := n.path
if len(path) > len(prefix) {
if path[:len(prefix)] == prefix {
path = path[len(prefix):]
// Try all the non-wildcard children first by matching the indices
idxc := path[0]
for i, c := range []byte(n.indices) {
if c == idxc {
// strings.HasPrefix(n.children[len(n.children)-1].path, ":") == n.wildChild
if n.wildChild {
index := len(*skippedNodes)
*skippedNodes = (*skippedNodes)[:index+1]
(*skippedNodes)[index] = skippedNode{
path: prefix + path,
node: &node{
path: n.path,
wildChild: n.wildChild,
nType: n.nType,
priority: n.priority,
children: n.children,
handlers: n.handlers,
fullPath: n.fullPath,
},
paramsCount: globalParamsCount,
}
}
n = n.children[i]
continue walk
}
}
if !n.wildChild {
// If the path at the end of the loop is not equal to '/' and the current node has no child nodes
// the current node needs to roll back to last valid skippedNode
if path != "/" {
for length := len(*skippedNodes); length > 0; length-- {
skippedNode := (*skippedNodes)[length-1]
*skippedNodes = (*skippedNodes)[:length-1]
if strings.HasSuffix(skippedNode.path, path) {
path = skippedNode.path
n = skippedNode.node
if value.params != nil {
*value.params = (*value.params)[:skippedNode.paramsCount]
}
globalParamsCount = skippedNode.paramsCount
continue walk
}
}
}
// Nothing found.
// We can recommend to redirect to the same URL without a
// trailing slash if a leaf exists for that path.
value.tsr = path == "/" && n.handlers != nil
return value
}
// Handle wildcard child, which is always at the end of the array
n = n.children[len(n.children)-1]
globalParamsCount++
switch n.nType {
case param:
// fix truncate the parameter
// tree_test.go line: 204
// Find param end (either '/' or path end)
end := 0
for end < len(path) && path[end] != '/' {
end++
}
// Save param value
if params != nil {
// Preallocate capacity if necessary
if cap(*params) < int(globalParamsCount) {
newParams := make(Params, len(*params), globalParamsCount)
copy(newParams, *params)
*params = newParams
}
if value.params == nil {
value.params = params
}
// Expand slice within preallocated capacity
i := len(*value.params)
*value.params = (*value.params)[:i+1]
val := path[:end]
if unescape {
if v, err := url.QueryUnescape(val); err == nil {
val = v
}
}
(*value.params)[i] = Param{
Key: n.path[1:],
Value: val,
}
}
// we need to go deeper!
if end < len(path) {
if len(n.children) > 0 {
path = path[end:]
n = n.children[0]
continue walk
}
// ... but we can't
value.tsr = len(path) == end+1
return value
}
if value.handlers = n.handlers; value.handlers != nil {
value.fullPath = n.fullPath
return value
}
if len(n.children) == 1 {
// No handle found. Check if a handle for this path + a
// trailing slash exists for TSR recommendation
n = n.children[0]
value.tsr = (n.path == "/" && n.handlers != nil) || (n.path == "" && n.indices == "/")
}
return value
case catchAll:
// Save param value
if params != nil {
// Preallocate capacity if necessary
if cap(*params) < int(globalParamsCount) {
newParams := make(Params, len(*params), globalParamsCount)
copy(newParams, *params)
*params = newParams
}
if value.params == nil {
value.params = params
}
// Expand slice within preallocated capacity
i := len(*value.params)
*value.params = (*value.params)[:i+1]
val := path
if unescape {
if v, err := url.QueryUnescape(path); err == nil {
val = v
}
}
(*value.params)[i] = Param{
Key: n.path[2:],
Value: val,
}
}
value.handlers = n.handlers
value.fullPath = n.fullPath
return value
default:
panic("invalid node type")
}
}
}
if path == prefix {
// If the current path does not equal '/' and the node does not have a registered handle and the most recently matched node has a child node
// the current node needs to roll back to last valid skippedNode
if n.handlers == nil && path != "/" {
for length := len(*skippedNodes); length > 0; length-- {
skippedNode := (*skippedNodes)[length-1]
*skippedNodes = (*skippedNodes)[:length-1]
if strings.HasSuffix(skippedNode.path, path) {
path = skippedNode.path
n = skippedNode.node
if value.params != nil {
*value.params = (*value.params)[:skippedNode.paramsCount]
}
globalParamsCount = skippedNode.paramsCount
continue walk
}
}
// n = latestNode.children[len(latestNode.children)-1]
}
// We should have reached the node containing the handle.
// Check if this node has a handle registered.
if value.handlers = n.handlers; value.handlers != nil {
value.fullPath = n.fullPath
return value
}
// If there is no handle for this route, but this route has a
// wildcard child, there must be a handle for this path with an
// additional trailing slash
if path == "/" && n.wildChild && n.nType != root {
value.tsr = true
return value
}
if path == "/" && n.nType == static {
value.tsr = true
return value
}
// No handle found. Check if a handle for this path + a
// trailing slash exists for trailing slash recommendation
for i, c := range []byte(n.indices) {
if c == '/' {
n = n.children[i]
value.tsr = (len(n.path) == 1 && n.handlers != nil) ||
(n.nType == catchAll && n.children[0].handlers != nil)
return value
}
}
return value
}
// Nothing found. We can recommend to redirect to the same URL with an
// extra trailing slash if a leaf exists for that path
value.tsr = path == "/" ||
(len(prefix) == len(path)+1 && prefix[len(path)] == '/' &&
path == prefix[:len(prefix)-1] && n.handlers != nil)
// roll back to last valid skippedNode
if !value.tsr && path != "/" {
for length := len(*skippedNodes); length > 0; length-- {
skippedNode := (*skippedNodes)[length-1]
*skippedNodes = (*skippedNodes)[:length-1]
if strings.HasSuffix(skippedNode.path, path) {
path = skippedNode.path
n = skippedNode.node
if value.params != nil {
*value.params = (*value.params)[:skippedNode.paramsCount]
}
globalParamsCount = skippedNode.paramsCount
continue walk
}
}
}
return value
}
}
// Makes a case-insensitive lookup of the given path and tries to find a handler.
// It can optionally also fix trailing slashes.
// It returns the case-corrected path and a bool indicating whether the lookup
// was successful.
func (n *node) findCaseInsensitivePath(path string, fixTrailingSlash bool) ([]byte, bool) {
const stackBufSize = 128
// Use a static sized buffer on the stack in the common case.
// If the path is too long, allocate a buffer on the heap instead.
buf := make([]byte, 0, stackBufSize)
if length := len(path) + 1; length > stackBufSize {
buf = make([]byte, 0, length)
}
ciPath := n.findCaseInsensitivePathRec(
path,
buf, // Preallocate enough memory for new path
[4]byte{}, // Empty rune buffer
fixTrailingSlash,
)
return ciPath, ciPath != nil
}
// Shift bytes in array by n bytes left
func shiftNRuneBytes(rb [4]byte, n int) [4]byte {
switch n {
case 0:
return rb
case 1:
return [4]byte{rb[1], rb[2], rb[3], 0}
case 2:
return [4]byte{rb[2], rb[3]}
case 3:
return [4]byte{rb[3]}
default:
return [4]byte{}
}
}
// Recursive case-insensitive lookup function used by n.findCaseInsensitivePath
func (n *node) findCaseInsensitivePathRec(path string, ciPath []byte, rb [4]byte, fixTrailingSlash bool) []byte {
npLen := len(n.path)
walk: // Outer loop for walking the tree
for len(path) >= npLen && (npLen == 0 || strings.EqualFold(path[1:npLen], n.path[1:])) {
// Add common prefix to result
oldPath := path
path = path[npLen:]
ciPath = append(ciPath, n.path...)
if len(path) == 0 {
// We should have reached the node containing the handle.
// Check if this node has a handle registered.
if n.handlers != nil {
return ciPath
}
// No handle found.
// Try to fix the path by adding a trailing slash
if fixTrailingSlash {
for i, c := range []byte(n.indices) {
if c == '/' {
n = n.children[i]
if (len(n.path) == 1 && n.handlers != nil) ||
(n.nType == catchAll && n.children[0].handlers != nil) {
return append(ciPath, '/')
}
return nil
}
func (n *_node) travel(list *([]*_node)) {
if n.pattern != "" {
*list = append(*list, n)
}
for _, child := range n.children {
child.travel(list)
}
}
func (n *_node) matchChild(part string) *_node {
for _, child := range n.children {
if child.part == part || child.isWild {
return child
}
}
return nil
}
func (n *_node) matchChildren(part string) []*_node {
nodes := make([]*_node, 0)
for _, child := range n.children {
if child.part == part || child.isWild {
nodes = append(nodes, child)
// If this node does not have a wildcard (param or catchAll) child,
// we can just look up the next child node and continue to walk down
// the tree
if !n.wildChild {
// Skip rune bytes already processed
rb = shiftNRuneBytes(rb, npLen)
if rb[0] != 0 {
// Old rune not finished
idxc := rb[0]
for i, c := range []byte(n.indices) {
if c == idxc {
// continue with child node
n = n.children[i]
npLen = len(n.path)
continue walk
}
}
return nodes
} else {
// Process a new rune
var rv rune
// Find rune start.
// Runes are up to 4 byte long,
// -4 would definitely be another rune.
var off int
for max := min(npLen, 3); off < max; off++ {
if i := npLen - off; utf8.RuneStart(oldPath[i]) {
// read rune from cached path
rv, _ = utf8.DecodeRuneInString(oldPath[i:])
break
}
}
// Calculate lowercase bytes of current rune
lo := unicode.ToLower(rv)
utf8.EncodeRune(rb[:], lo)
// Skip already processed bytes
rb = shiftNRuneBytes(rb, off)
idxc := rb[0]
for i, c := range []byte(n.indices) {
// Lowercase matches
if c == idxc {
// must use a recursive approach since both the
// uppercase byte and the lowercase byte might exist
// as an index
if out := n.children[i].findCaseInsensitivePathRec(
path, ciPath, rb, fixTrailingSlash,
); out != nil {
return out
}
break
}
}
// If we found no match, the same for the uppercase rune,
// if it differs
if up := unicode.ToUpper(rv); up != lo {
utf8.EncodeRune(rb[:], up)
rb = shiftNRuneBytes(rb, off)
idxc := rb[0]
for i, c := range []byte(n.indices) {
// Uppercase matches
if c == idxc {
// Continue with child node
n = n.children[i]
npLen = len(n.path)
continue walk
}
}
}
}
// Nothing found. We can recommend to redirect to the same URL
// without a trailing slash if a leaf exists for that path
if fixTrailingSlash && path == "/" && n.handlers != nil {
return ciPath
}
return nil
}
n = n.children[0]
switch n.nType {
case param:
// Find param end (either '/' or path end)
end := 0
for end < len(path) && path[end] != '/' {
end++
}
// Add param value to case insensitive path
ciPath = append(ciPath, path[:end]...)
// We need to go deeper!
if end < len(path) {
if len(n.children) > 0 {
// Continue with child node
n = n.children[0]
npLen = len(n.path)
path = path[end:]
continue
}
// ... but we can't
if fixTrailingSlash && len(path) == end+1 {
return ciPath
}
return nil
}
if n.handlers != nil {
return ciPath
}
if fixTrailingSlash && len(n.children) == 1 {
// No handle found. Check if a handle for this path + a
// trailing slash exists
n = n.children[0]
if n.path == "/" && n.handlers != nil {
return append(ciPath, '/')
}
}
return nil
case catchAll:
return append(ciPath, path...)
default:
panic("invalid node type")
}
}
// Nothing found.
// Try to fix the path by adding / removing a trailing slash
if fixTrailingSlash {
if path == "/" {
return ciPath
}
if len(path)+1 == npLen && n.path[len(path)] == '/' &&
strings.EqualFold(path[1:], n.path[1:len(path)]) && n.handlers != nil {
return append(ciPath, n.path...)
}
}
return nil
}

137
util.go
View File

@ -65,3 +65,140 @@ func parseToStruct(aliasTag string, out interface{}, data map[string][]string) e
return nil
}
func elsePanic(guard bool, text string) {
if !guard {
panic(text)
}
}
func cleanPath(p string) string {
const stackBufSize = 128
// Turn empty string into "/"
if p == "" {
return "/"
}
// Reasonably sized buffer on stack to avoid allocations in the common case.
// If a larger buffer is required, it gets allocated dynamically.
buf := make([]byte, 0, stackBufSize)
n := len(p)
// Invariants:
// reading from path; r is index of next byte to process.
// writing to buf; w is index of next byte to write.
// path must start with '/'
r := 1
w := 1
if p[0] != '/' {
r = 0
if n+1 > stackBufSize {
buf = make([]byte, n+1)
} else {
buf = buf[:n+1]
}
buf[0] = '/'
}
trailing := n > 1 && p[n-1] == '/'
// A bit more clunky without a 'lazybuf' like the path package, but the loop
// gets completely inlined (bufApp calls).
// loop has no expensive function calls (except 1x make) // So in contrast to the path package this loop has no expensive function
// calls (except make, if needed).
for r < n {
switch {
case p[r] == '/':
// empty path element, trailing slash is added after the end
r++
case p[r] == '.' && r+1 == n:
trailing = true
r++
case p[r] == '.' && p[r+1] == '/':
// . element
r += 2
case p[r] == '.' && p[r+1] == '.' && (r+2 == n || p[r+2] == '/'):
// .. element: remove to last /
r += 3
if w > 1 {
// can backtrack
w--
if len(buf) == 0 {
for w > 1 && p[w] != '/' {
w--
}
} else {
for w > 1 && buf[w] != '/' {
w--
}
}
}
default:
// Real path element.
// Add slash if needed
if w > 1 {
bufApp(&buf, p, w, '/')
w++
}
// Copy element
for r < n && p[r] != '/' {
bufApp(&buf, p, w, p[r])
w++
r++
}
}
}
// Re-append trailing slash
if trailing && w > 1 {
bufApp(&buf, p, w, '/')
w++
}
// If the original string was not modified (or only shortened at the end),
// return the respective substring of the original string.
// Otherwise return a new string from the buffer.
if len(buf) == 0 {
return p[:w]
}
return string(buf[:w])
}
// Internal helper to lazily create a buffer if necessary.
// Calls to this function get inlined.
func bufApp(buf *[]byte, s string, w int, c byte) {
b := *buf
if len(b) == 0 {
// No modification of the original string so far.
// If the next character is the same as in the original string, we do
// not yet have to allocate a buffer.
if s[w] == c {
return
}
// Otherwise use either the stack buffer, if it is large enough, or
// allocate a new buffer on the heap, and copy all previous characters.
length := len(s)
if length > cap(b) {
*buf = make([]byte, length)
} else {
*buf = (*buf)[:length]
}
b = *buf
copy(b, s[:w])
}
b[w] = c
}

39
xtest/basic/main.go
View File

@ -1,49 +1,16 @@
package main
import (
"errors"
"github.com/loveuer/nf"
"github.com/loveuer/nf/nft/resp"
"log"
"time"
)
func main() {
app := nf.New(nf.Config{EnableNotImplementHandler: true})
app.Get("/hello/:name", func(c *nf.Ctx) error {
name := c.Param("name")
return c.JSON(nf.Map{"status": 200, "data": "hello, " + name})
})
app.Get("/not_impl")
app.Patch("/world", func(c *nf.Ctx) error {
time.Sleep(5 * time.Second)
c.Status(404)
return c.JSON(nf.Map{"method": c.Method, "status": c.StatusCode})
})
app.Get("/error", func(c *nf.Ctx) error {
return resp.RespError(c, resp.NewError(404, "not found", errors.New("NNNot Found"), nil))
})
app.Post("/data", func(c *nf.Ctx) error {
type Req struct {
Name string `json:"name"`
}
var (
err error
req = new(Req)
rm = make(map[string]any)
)
if err = c.BodyParser(req); err != nil {
return c.JSON(nf.Map{"status": 400, "msg": err.Error()})
}
if err = c.BodyParser(&rm); err != nil {
return c.JSON(nf.Map{"status": 400, "msg": err.Error()})
}
return c.JSON(nf.Map{"status": 200, "data": req, "map": rm})
api := app.Group("/api")
api.Get("/1", func(c *nf.Ctx) error {
return c.SendString("nice")
})
log.Fatal(app.Run(":80"))

2
xtest/bodyLimit/main.go
View File

@ -6,7 +6,7 @@ import (
)
func main() {
app := nf.New(nf.Config{BodyLimit: -1})
app := nf.New(nf.Config{BodyLimit: 30})
app.Post("/data", func(c *nf.Ctx) error {
type Req struct {

8
xtest/midd/main.go
View File

@ -11,19 +11,17 @@ func main() {
app.Get("/hello", func(c *nf.Ctx) error {
return c.SendString("world")
})
app.Get("/panic", func(c *nf.Ctx) error {
panic("panic")
})
app.Use(ml())
log.Fatal(app.Run(":7777"))
log.Fatal(app.Run(":80"))
}
func ml() nf.HandlerFunc {
return func(c *nf.Ctx) error {
log.Printf("[ML] [%s] - [%s]", c.Method, c.Path())
index := []byte(`<h1>my not found</h1>`)
c.Set("Content-Type", "text/html")
c.Status(403)
_, err := c.Write(index)
return err
}

5
xtest/multihandler/main.go
View File

@ -10,7 +10,7 @@ func main() {
app.Get("/nice", h1, h2)
log.Fatal(app.Run(":3333"))
log.Fatal(app.Run(":80"))
}
func h1(c *nf.Ctx) error {
@ -19,7 +19,8 @@ func h1(c *nf.Ctx) error {
return c.JSON(nf.Map{"status": 201, "msg": "nice to meet you"})
}
return c.Next()
//return c.Next()
return nil
}
func h2(c *nf.Ctx) error {

2
xtest/panic/main.go
View File

@ -7,7 +7,7 @@ import (
func main() {
app := nf.New(nf.Config{
DisableRecover: true,
DisableRecover: false,
})
app.Get("/hello/:name", func(c *nf.Ctx) error {