forked from mirror/gin
Zero allocation router, first commit
This commit is contained in:
Manu Mtz-Almeida
parent
c0e8cedc98
commit
2915fa0ffe
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@ -13,7 +13,6 @@ import (
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"github.com/gin-gonic/gin/binding"
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"github.com/gin-gonic/gin/render"
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"github.com/julienschmidt/httprouter"
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)
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const AbortIndex = math.MaxInt8 / 2
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@ -26,7 +25,7 @@ type Context struct {
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Request *http.Request
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Writer ResponseWriter
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Params httprouter.Params
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Params Params
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Input inputHolder
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handlers []HandlerFunc
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index int8
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132
deprecated.go
132
deprecated.go
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@ -3,135 +3,3 @@
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// license that can be found in the LICENSE file.
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package gin
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import (
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"log"
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"net"
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"net/http"
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"strings"
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"github.com/gin-gonic/gin/binding"
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)
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const (
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MIMEJSON = binding.MIMEJSON
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MIMEHTML = binding.MIMEHTML
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MIMEXML = binding.MIMEXML
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MIMEXML2 = binding.MIMEXML2
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MIMEPlain = binding.MIMEPlain
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MIMEPOSTForm = binding.MIMEPOSTForm
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MIMEMultipartPOSTForm = binding.MIMEMultipartPOSTForm
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)
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// DEPRECATED, use Bind() instead.
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// Like ParseBody() but this method also writes a 400 error if the json is not valid.
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func (c *Context) EnsureBody(item interface{}) bool {
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return c.Bind(item)
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}
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// DEPRECATED use bindings directly
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// Parses the body content as a JSON input. It decodes the json payload into the struct specified as a pointer.
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func (c *Context) ParseBody(item interface{}) error {
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return binding.JSON.Bind(c.Request, item)
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}
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// DEPRECATED use gin.Static() instead
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// ServeFiles serves files from the given file system root.
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// The path must end with "/*filepath", files are then served from the local
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// path /defined/root/dir/*filepath.
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// For example if root is "/etc" and *filepath is "passwd", the local file
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// "/etc/passwd" would be served.
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// Internally a http.FileServer is used, therefore http.NotFound is used instead
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// of the Router's NotFound handler.
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// To use the operating system's file system implementation,
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// use http.Dir:
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// router.ServeFiles("/src/*filepath", http.Dir("/var/www"))
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func (engine *Engine) ServeFiles(path string, root http.FileSystem) {
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engine.router.ServeFiles(path, root)
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}
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// DEPRECATED use gin.LoadHTMLGlob() or gin.LoadHTMLFiles() instead
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func (engine *Engine) LoadHTMLTemplates(pattern string) {
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engine.LoadHTMLGlob(pattern)
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}
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// DEPRECATED. Use NoRoute() instead
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func (engine *Engine) NotFound404(handlers ...HandlerFunc) {
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engine.NoRoute(handlers...)
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}
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// the ForwardedFor middleware unwraps the X-Forwarded-For headers, be careful to only use this
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// middleware if you've got servers in front of this server. The list with (known) proxies and
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// local ips are being filtered out of the forwarded for list, giving the last not local ip being
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// the real client ip.
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func ForwardedFor(proxies ...interface{}) HandlerFunc {
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if len(proxies) == 0 {
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// default to local ips
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var reservedLocalIps = []string{"10.0.0.0/8", "127.0.0.1/32", "172.16.0.0/12", "192.168.0.0/16"}
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proxies = make([]interface{}, len(reservedLocalIps))
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for i, v := range reservedLocalIps {
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proxies[i] = v
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}
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}
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return func(c *Context) {
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// the X-Forwarded-For header contains an array with left most the client ip, then
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// comma separated, all proxies the request passed. The last proxy appears
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// as the remote address of the request. Returning the client
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// ip to comply with default RemoteAddr response.
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// check if remoteaddr is local ip or in list of defined proxies
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remoteIp := net.ParseIP(strings.Split(c.Request.RemoteAddr, ":")[0])
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if !ipInMasks(remoteIp, proxies) {
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return
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}
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if forwardedFor := c.Request.Header.Get("X-Forwarded-For"); forwardedFor != "" {
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parts := strings.Split(forwardedFor, ",")
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for i := len(parts) - 1; i >= 0; i-- {
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part := parts[i]
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ip := net.ParseIP(strings.TrimSpace(part))
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if ipInMasks(ip, proxies) {
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continue
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}
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// returning remote addr conform the original remote addr format
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c.Request.RemoteAddr = ip.String() + ":0"
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// remove forwarded for address
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c.Request.Header.Set("X-Forwarded-For", "")
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return
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}
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}
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}
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}
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func ipInMasks(ip net.IP, masks []interface{}) bool {
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for _, proxy := range masks {
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var mask *net.IPNet
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var err error
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switch t := proxy.(type) {
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case string:
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if _, mask, err = net.ParseCIDR(t); err != nil {
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log.Panic(err)
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}
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case net.IP:
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mask = &net.IPNet{IP: t, Mask: net.CIDRMask(len(t)*8, len(t)*8)}
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case net.IPNet:
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mask = &t
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}
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if mask.Contains(ip) {
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return true
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}
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}
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return false
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}
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130
gin.go
130
gin.go
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@ -11,9 +11,32 @@ import (
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"github.com/gin-gonic/gin/binding"
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"github.com/gin-gonic/gin/render"
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"github.com/julienschmidt/httprouter"
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)
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// Param is a single URL parameter, consisting of a key and a value.
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type Param struct {
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Key string
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Value string
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}
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// Params is a Param-slice, as returned by the router.
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// The slice is ordered, the first URL parameter is also the first slice value.
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// It is therefore safe to read values by the index.
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type Params []Param
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// ByName returns the value of the first Param which key matches the given name.
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// If no matching Param is found, an empty string is returned.
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func (ps Params) ByName(name string) string {
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for i := range ps {
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if ps[i].Key == name {
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return ps[i].Value
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}
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}
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return ""
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}
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var default404Body = []byte("404 page not found")
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var default405Body = []byte("405 method not allowed")
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type (
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HandlerFunc func(*Context)
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@ -21,32 +44,56 @@ type (
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// Represents the web framework, it wraps the blazing fast httprouter multiplexer and a list of global middlewares.
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Engine struct {
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*RouterGroup
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HTMLRender render.Render
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Default404Body []byte
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Default405Body []byte
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pool sync.Pool
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allNoRoute []HandlerFunc
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allNoMethod []HandlerFunc
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noRoute []HandlerFunc
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noMethod []HandlerFunc
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router *httprouter.Router
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HTMLRender render.Render
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pool sync.Pool
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allNoRoute []HandlerFunc
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allNoMethod []HandlerFunc
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noRoute []HandlerFunc
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noMethod []HandlerFunc
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trees map[string]*node
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// Enables automatic redirection if the current route can't be matched but a
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// handler for the path with (without) the trailing slash exists.
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// For example if /foo/ is requested but a route only exists for /foo, the
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// client is redirected to /foo with http status code 301 for GET requests
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// and 307 for all other request methods.
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RedirectTrailingSlash bool
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// If enabled, the router tries to fix the current request path, if no
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// handle is registered for it.
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// First superfluous path elements like ../ or // are removed.
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// Afterwards the router does a case-insensitive lookup of the cleaned path.
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// If a handle can be found for this route, the router makes a redirection
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// to the corrected path with status code 301 for GET requests and 307 for
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// all other request methods.
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// For example /FOO and /..//Foo could be redirected to /foo.
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// RedirectTrailingSlash is independent of this option.
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RedirectFixedPath bool
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// If enabled, the router checks if another method is allowed for the
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// current route, if the current request can not be routed.
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// If this is the case, the request is answered with 'Method Not Allowed'
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// and HTTP status code 405.
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// If no other Method is allowed, the request is delegated to the NotFound
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// handler.
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HandleMethodNotAllowed bool
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}
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)
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// Returns a new blank Engine instance without any middleware attached.
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// The most basic configuration
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func New() *Engine {
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engine := &Engine{}
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engine := &Engine{
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RedirectTrailingSlash: true,
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RedirectFixedPath: true,
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HandleMethodNotAllowed: true,
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trees: make(map[string]*node),
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}
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engine.RouterGroup = &RouterGroup{
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Handlers: nil,
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absolutePath: "/",
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engine: engine,
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}
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engine.router = httprouter.New()
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engine.Default404Body = []byte("404 page not found")
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engine.Default405Body = []byte("405 method not allowed")
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engine.router.NotFound = engine.handle404
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engine.router.MethodNotAllowed = engine.handle405
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engine.pool.New = func() interface{} {
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return engine.allocateContext()
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}
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@ -67,13 +114,11 @@ func (engine *Engine) allocateContext() (context *Context) {
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return
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}
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func (engine *Engine) createContext(w http.ResponseWriter, req *http.Request, params httprouter.Params, handlers []HandlerFunc) *Context {
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func (engine *Engine) createContext(w http.ResponseWriter, req *http.Request) *Context {
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c := engine.pool.Get().(*Context)
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c.reset()
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c.writermem.reset(w)
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c.Request = req
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c.Params = params
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c.handlers = handlers
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return c
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}
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@ -132,39 +177,66 @@ func (engine *Engine) rebuild405Handlers() {
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engine.allNoMethod = engine.combineHandlers(engine.noMethod)
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}
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func (engine *Engine) handle404(w http.ResponseWriter, req *http.Request) {
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c := engine.createContext(w, req, nil, engine.allNoRoute)
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func (engine *Engine) handle404(c *Context) {
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// set 404 by default, useful for logging
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c.handlers = engine.allNoRoute
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c.Writer.WriteHeader(404)
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c.Next()
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if !c.Writer.Written() {
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if c.Writer.Status() == 404 {
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c.Data(-1, binding.MIMEPlain, engine.Default404Body)
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c.Data(-1, binding.MIMEPlain, default404Body)
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} else {
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c.Writer.WriteHeaderNow()
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}
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}
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engine.reuseContext(c)
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}
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func (engine *Engine) handle405(w http.ResponseWriter, req *http.Request) {
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c := engine.createContext(w, req, nil, engine.allNoMethod)
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func (engine *Engine) handle405(c *Context) {
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// set 405 by default, useful for logging
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c.handlers = engine.allNoMethod
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c.Writer.WriteHeader(405)
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c.Next()
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if !c.Writer.Written() {
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if c.Writer.Status() == 405 {
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c.Data(-1, binding.MIMEPlain, engine.Default405Body)
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c.Data(-1, binding.MIMEPlain, default405Body)
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} else {
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c.Writer.WriteHeaderNow()
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}
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}
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engine.reuseContext(c)
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}
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func (engine *Engine) handle(method, path string, handlers []HandlerFunc) {
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if path[0] != '/' {
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panic("path must begin with '/'")
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}
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//methodCode := codeForHTTPMethod(method)
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root := engine.trees[method]
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if root == nil {
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root = new(node)
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engine.trees[method] = root
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}
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root.addRoute(path, handlers)
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}
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// ServeHTTP makes the router implement the http.Handler interface.
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func (engine *Engine) ServeHTTP(writer http.ResponseWriter, request *http.Request) {
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engine.router.ServeHTTP(writer, request)
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func (engine *Engine) ServeHTTP(w http.ResponseWriter, req *http.Request) {
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c := engine.createContext(w, req)
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//methodCode := codeForHTTPMethod(req.Method)
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if root := engine.trees[req.Method]; root != nil {
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path := req.URL.Path
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if handlers, params, _ := root.getValue(path, c.Params); handlers != nil {
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c.handlers = handlers
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c.Params = params
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c.Next()
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engine.reuseContext(c)
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return
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}
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}
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// Handle 404
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engine.handle404(c)
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engine.reuseContext(c)
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}
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func (engine *Engine) Run(addr string) error {
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@ -0,0 +1,123 @@
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// Copyright 2013 Julien Schmidt. All rights reserved.
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// Based on the path package, Copyright 2009 The Go Authors.
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// Use of this source code is governed by a BSD-style license that can be found
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// in the LICENSE file.
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package gin
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// CleanPath is the URL version of path.Clean, it returns a canonical URL path
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// for p, eliminating . and .. elements.
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//
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// The following rules are applied iteratively until no further processing can
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// be done:
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// 1. Replace multiple slashes with a single slash.
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// 2. Eliminate each . path name element (the current directory).
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// 3. Eliminate each inner .. path name element (the parent directory)
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// along with the non-.. element that precedes it.
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// 4. Eliminate .. elements that begin a rooted path:
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// that is, replace "/.." by "/" at the beginning of a path.
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//
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// If the result of this process is an empty string, "/" is returned
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func CleanPath(p string) string {
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// Turn empty string into "/"
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if p == "" {
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return "/"
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}
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n := len(p)
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var buf []byte
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// Invariants:
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// reading from path; r is index of next byte to process.
|
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// writing to buf; w is index of next byte to write.
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// path must start with '/'
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r := 1
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w := 1
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if p[0] != '/' {
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r = 0
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buf = make([]byte, n+1)
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buf[0] = '/'
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}
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trailing := n > 2 && p[n-1] == '/'
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// A bit more clunky without a 'lazybuf' like the path package, but the loop
|
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// gets completely inlined (bufApp). So in contrast to the path package this
|
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// loop has no expensive function calls (except 1x make)
|
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for r < n {
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switch {
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case p[r] == '/':
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// empty path element, trailing slash is added after the end
|
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r++
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case p[r] == '.' && r+1 == n:
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trailing = true
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r++
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case p[r] == '.' && p[r+1] == '/':
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// . element
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r++
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case p[r] == '.' && p[r+1] == '.' && (r+2 == n || p[r+2] == '/'):
|
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// .. element: remove to last /
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r += 2
|
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|
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if w > 1 {
|
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// can backtrack
|
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w--
|
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|
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if buf == nil {
|
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for w > 1 && p[w] != '/' {
|
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w--
|
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}
|
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} else {
|
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for w > 1 && buf[w] != '/' {
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w--
|
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}
|
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}
|
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}
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|
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default:
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// real path element.
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// add slash if needed
|
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if w > 1 {
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bufApp(&buf, p, w, '/')
|
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w++
|
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}
|
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|
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// copy element
|
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for r < n && p[r] != '/' {
|
||||
bufApp(&buf, p, w, p[r])
|
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w++
|
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r++
|
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}
|
||||
}
|
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}
|
||||
|
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// re-append trailing slash
|
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if trailing && w > 1 {
|
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bufApp(&buf, p, w, '/')
|
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w++
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}
|
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|
||||
if buf == nil {
|
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return p[:w]
|
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}
|
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return string(buf[:w])
|
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}
|
||||
|
||||
// internal helper to lazily create a buffer if necessary
|
||||
func bufApp(buf *[]byte, s string, w int, c byte) {
|
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if *buf == nil {
|
||||
if s[w] == c {
|
||||
return
|
||||
}
|
||||
|
||||
*buf = make([]byte, len(s))
|
||||
copy(*buf, s[:w])
|
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}
|
||||
(*buf)[w] = c
|
||||
}
|
||||
|
|
@ -0,0 +1,92 @@
|
|||
// Copyright 2013 Julien Schmidt. All rights reserved.
|
||||
// Based on the path package, Copyright 2009 The Go Authors.
|
||||
// Use of this source code is governed by a BSD-style license that can be found
|
||||
// in the LICENSE file.
|
||||
|
||||
package gin
|
||||
|
||||
import (
|
||||
"runtime"
|
||||
"testing"
|
||||
)
|
||||
|
||||
var cleanTests = []struct {
|
||||
path, result string
|
||||
}{
|
||||
// Already clean
|
||||
{"/", "/"},
|
||||
{"/abc", "/abc"},
|
||||
{"/a/b/c", "/a/b/c"},
|
||||
{"/abc/", "/abc/"},
|
||||
{"/a/b/c/", "/a/b/c/"},
|
||||
|
||||
// missing root
|
||||
{"", "/"},
|
||||
{"abc", "/abc"},
|
||||
{"abc/def", "/abc/def"},
|
||||
{"a/b/c", "/a/b/c"},
|
||||
|
||||
// Remove doubled slash
|
||||
{"//", "/"},
|
||||
{"/abc//", "/abc/"},
|
||||
{"/abc/def//", "/abc/def/"},
|
||||
{"/a/b/c//", "/a/b/c/"},
|
||||
{"/abc//def//ghi", "/abc/def/ghi"},
|
||||
{"//abc", "/abc"},
|
||||
{"///abc", "/abc"},
|
||||
{"//abc//", "/abc/"},
|
||||
|
||||
// Remove . elements
|
||||
{".", "/"},
|
||||
{"./", "/"},
|
||||
{"/abc/./def", "/abc/def"},
|
||||
{"/./abc/def", "/abc/def"},
|
||||
{"/abc/.", "/abc/"},
|
||||
|
||||
// Remove .. elements
|
||||
{"..", "/"},
|
||||
{"../", "/"},
|
||||
{"../../", "/"},
|
||||
{"../..", "/"},
|
||||
{"../../abc", "/abc"},
|
||||
{"/abc/def/ghi/../jkl", "/abc/def/jkl"},
|
||||
{"/abc/def/../ghi/../jkl", "/abc/jkl"},
|
||||
{"/abc/def/..", "/abc"},
|
||||
{"/abc/def/../..", "/"},
|
||||
{"/abc/def/../../..", "/"},
|
||||
{"/abc/def/../../..", "/"},
|
||||
{"/abc/def/../../../ghi/jkl/../../../mno", "/mno"},
|
||||
|
||||
// Combinations
|
||||
{"abc/./../def", "/def"},
|
||||
{"abc//./../def", "/def"},
|
||||
{"abc/../../././../def", "/def"},
|
||||
}
|
||||
|
||||
func TestPathClean(t *testing.T) {
|
||||
for _, test := range cleanTests {
|
||||
if s := CleanPath(test.path); s != test.result {
|
||||
t.Errorf("CleanPath(%q) = %q, want %q", test.path, s, test.result)
|
||||
}
|
||||
if s := CleanPath(test.result); s != test.result {
|
||||
t.Errorf("CleanPath(%q) = %q, want %q", test.result, s, test.result)
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
func TestPathCleanMallocs(t *testing.T) {
|
||||
if testing.Short() {
|
||||
t.Skip("skipping malloc count in short mode")
|
||||
}
|
||||
if runtime.GOMAXPROCS(0) > 1 {
|
||||
t.Log("skipping AllocsPerRun checks; GOMAXPROCS>1")
|
||||
return
|
||||
}
|
||||
|
||||
for _, test := range cleanTests {
|
||||
allocs := testing.AllocsPerRun(100, func() { CleanPath(test.result) })
|
||||
if allocs > 0 {
|
||||
t.Errorf("CleanPath(%q): %v allocs, want zero", test.result, allocs)
|
||||
}
|
||||
}
|
||||
}
|
||||
|
|
@ -7,8 +7,6 @@ package gin
|
|||
import (
|
||||
"net/http"
|
||||
"path"
|
||||
|
||||
"github.com/julienschmidt/httprouter"
|
||||
)
|
||||
|
||||
// Used internally to configure router, a RouterGroup is associated with a prefix
|
||||
|
|
@ -48,13 +46,7 @@ func (group *RouterGroup) Handle(httpMethod, relativePath string, handlers []Han
|
|||
absolutePath := group.calculateAbsolutePath(relativePath)
|
||||
handlers = group.combineHandlers(handlers)
|
||||
debugRoute(httpMethod, absolutePath, handlers)
|
||||
|
||||
group.engine.router.Handle(httpMethod, absolutePath, func(w http.ResponseWriter, req *http.Request, params httprouter.Params) {
|
||||
context := group.engine.createContext(w, req, params, handlers)
|
||||
context.Next()
|
||||
context.Writer.WriteHeaderNow()
|
||||
group.engine.reuseContext(context)
|
||||
})
|
||||
group.engine.handle(httpMethod, absolutePath, handlers)
|
||||
}
|
||||
|
||||
// POST is a shortcut for router.Handle("POST", path, handle)
|
||||
|
|
|
|||
|
|
@ -0,0 +1,556 @@
|
|||
// Copyright 2013 Julien Schmidt. All rights reserved.
|
||||
// Use of this source code is governed by a BSD-style license that can be found
|
||||
// in the LICENSE file.
|
||||
|
||||
package gin
|
||||
|
||||
import (
|
||||
"strings"
|
||||
"unicode"
|
||||
)
|
||||
|
||||
func min(a, b int) int {
|
||||
if a <= b {
|
||||
return a
|
||||
}
|
||||
return b
|
||||
}
|
||||
|
||||
func countParams(path string) uint8 {
|
||||
var n uint
|
||||
for i := 0; i < len(path); i++ {
|
||||
if path[i] != ':' && path[i] != '*' {
|
||||
continue
|
||||
}
|
||||
n++
|
||||
}
|
||||
if n >= 255 {
|
||||
return 255
|
||||
}
|
||||
return uint8(n)
|
||||
}
|
||||
|
||||
type nodeType uint8
|
||||
|
||||
const (
|
||||
static nodeType = 0
|
||||
param nodeType = 1
|
||||
catchAll nodeType = 2
|
||||
)
|
||||
|
||||
type node struct {
|
||||
path string
|
||||
wildChild bool
|
||||
nType nodeType
|
||||
maxParams uint8
|
||||
indices string
|
||||
children []*node
|
||||
handlers []HandlerFunc
|
||||
priority uint32
|
||||
}
|
||||
|
||||
// increments priority of the given child and reorders if necessary
|
||||
func (n *node) incrementChildPrio(pos int) int {
|
||||
n.children[pos].priority++
|
||||
prio := n.children[pos].priority
|
||||
|
||||
// adjust position (move to front)
|
||||
newPos := pos
|
||||
for newPos > 0 && n.children[newPos-1].priority < prio {
|
||||
// swap node positions
|
||||
tmpN := n.children[newPos-1]
|
||||
n.children[newPos-1] = n.children[newPos]
|
||||
n.children[newPos] = tmpN
|
||||
|
||||
newPos--
|
||||
}
|
||||
|
||||
// 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) {
|
||||
n.priority++
|
||||
numParams := countParams(path)
|
||||
|
||||
// non-empty tree
|
||||
if len(n.path) > 0 || len(n.children) > 0 {
|
||||
walk:
|
||||
for {
|
||||
// Update maxParams of the current node
|
||||
if numParams > n.maxParams {
|
||||
n.maxParams = numParams
|
||||
}
|
||||
|
||||
// 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 := 0
|
||||
max := min(len(path), len(n.path))
|
||||
for i < max && path[i] == n.path[i] {
|
||||
i++
|
||||
}
|
||||
|
||||
// Split edge
|
||||
if i < len(n.path) {
|
||||
child := node{
|
||||
path: n.path[i:],
|
||||
wildChild: n.wildChild,
|
||||
indices: n.indices,
|
||||
children: n.children,
|
||||
handlers: n.handlers,
|
||||
priority: n.priority - 1,
|
||||
}
|
||||
|
||||
// Update maxParams (max of all children)
|
||||
for i := range child.children {
|
||||
if child.children[i].maxParams > child.maxParams {
|
||||
child.maxParams = child.children[i].maxParams
|
||||
}
|
||||
}
|
||||
|
||||
n.children = []*node{&child}
|
||||
// []byte for proper unicode char conversion, see #65
|
||||
n.indices = string([]byte{n.path[i]})
|
||||
n.path = path[:i]
|
||||
n.handlers = nil
|
||||
n.wildChild = false
|
||||
}
|
||||
|
||||
// Make new node a child of this node
|
||||
if i < len(path) {
|
||||
path = path[i:]
|
||||
|
||||
if n.wildChild {
|
||||
n = n.children[0]
|
||||
n.priority++
|
||||
|
||||
// Update maxParams of the child node
|
||||
if numParams > n.maxParams {
|
||||
n.maxParams = numParams
|
||||
}
|
||||
numParams--
|
||||
|
||||
// Check if the wildcard matches
|
||||
if len(path) >= len(n.path) && n.path == path[:len(n.path)] {
|
||||
// check for longer wildcard, e.g. :name and :names
|
||||
if len(n.path) >= len(path) || path[len(n.path)] == '/' {
|
||||
continue walk
|
||||
}
|
||||
}
|
||||
|
||||
panic("conflict with wildcard route")
|
||||
}
|
||||
|
||||
c := path[0]
|
||||
|
||||
// slash after param
|
||||
if n.nType == param && c == '/' && len(n.children) == 1 {
|
||||
n = n.children[0]
|
||||
n.priority++
|
||||
continue walk
|
||||
}
|
||||
|
||||
// Check if a child with the next path byte exists
|
||||
for i := 0; i < len(n.indices); i++ {
|
||||
if c == n.indices[i] {
|
||||
i = n.incrementChildPrio(i)
|
||||
n = n.children[i]
|
||||
continue walk
|
||||
}
|
||||
}
|
||||
|
||||
// Otherwise insert it
|
||||
if c != ':' && c != '*' {
|
||||
// []byte for proper unicode char conversion, see #65
|
||||
n.indices += string([]byte{c})
|
||||
child := &node{
|
||||
maxParams: numParams,
|
||||
}
|
||||
n.children = append(n.children, child)
|
||||
n.incrementChildPrio(len(n.indices) - 1)
|
||||
n = child
|
||||
}
|
||||
n.insertChild(numParams, path, handlers)
|
||||
return
|
||||
|
||||
} else if i == len(path) { // Make node a (in-path) leaf
|
||||
if n.handlers != nil {
|
||||
panic("a Handle is already registered for this path")
|
||||
}
|
||||
n.handlers = handlers
|
||||
}
|
||||
return
|
||||
}
|
||||
} else { // Empty tree
|
||||
n.insertChild(numParams, path, handlers)
|
||||
}
|
||||
}
|
||||
|
||||
func (n *node) insertChild(numParams uint8, path string, handlers []HandlerFunc) {
|
||||
var offset int // already handled bytes of the path
|
||||
|
||||
// find prefix until first wildcard (beginning with ':'' or '*'')
|
||||
for i, max := 0, len(path); numParams > 0; i++ {
|
||||
c := path[i]
|
||||
if c != ':' && c != '*' {
|
||||
continue
|
||||
}
|
||||
|
||||
// check if this Node existing children which would be
|
||||
// unreachable if we insert the wildcard here
|
||||
if len(n.children) > 0 {
|
||||
panic("wildcard route conflicts with existing children")
|
||||
}
|
||||
|
||||
// find wildcard end (either '/' or path end)
|
||||
end := i + 1
|
||||
for end < max && path[end] != '/' {
|
||||
switch path[end] {
|
||||
// the wildcard name must not contain ':' and '*'
|
||||
case ':', '*':
|
||||
panic("only one wildcard per path segment is allowed")
|
||||
default:
|
||||
end++
|
||||
}
|
||||
}
|
||||
|
||||
// check if the wildcard has a name
|
||||
if end-i < 2 {
|
||||
panic("wildcards must be named with a non-empty name")
|
||||
}
|
||||
|
||||
if c == ':' { // param
|
||||
// split path at the beginning of the wildcard
|
||||
if i > 0 {
|
||||
n.path = path[offset:i]
|
||||
offset = i
|
||||
}
|
||||
|
||||
child := &node{
|
||||
nType: param,
|
||||
maxParams: numParams,
|
||||
}
|
||||
n.children = []*node{child}
|
||||
n.wildChild = true
|
||||
n = child
|
||||
n.priority++
|
||||
numParams--
|
||||
|
||||
// if the path doesn't end with the wildcard, then there
|
||||
// will be another non-wildcard subpath starting with '/'
|
||||
if end < max {
|
||||
n.path = path[offset:end]
|
||||
offset = end
|
||||
|
||||
child := &node{
|
||||
maxParams: numParams,
|
||||
priority: 1,
|
||||
}
|
||||
n.children = []*node{child}
|
||||
n = child
|
||||
}
|
||||
|
||||
} else { // catchAll
|
||||
if end != max || numParams > 1 {
|
||||
panic("catch-all routes are only allowed at the end of the path")
|
||||
}
|
||||
|
||||
if len(n.path) > 0 && n.path[len(n.path)-1] == '/' {
|
||||
panic("catch-all conflicts with existing handle for the path segment root")
|
||||
}
|
||||
|
||||
// currently fixed width 1 for '/'
|
||||
i--
|
||||
if path[i] != '/' {
|
||||
panic("no / before catch-all")
|
||||
}
|
||||
|
||||
n.path = path[offset:i]
|
||||
|
||||
// first node: catchAll node with empty path
|
||||
child := &node{
|
||||
wildChild: true,
|
||||
nType: catchAll,
|
||||
maxParams: 1,
|
||||
}
|
||||
n.children = []*node{child}
|
||||
n.indices = string(path[i])
|
||||
n = child
|
||||
n.priority++
|
||||
|
||||
// second node: node holding the variable
|
||||
child = &node{
|
||||
path: path[i:],
|
||||
nType: catchAll,
|
||||
maxParams: 1,
|
||||
handlers: handlers,
|
||||
priority: 1,
|
||||
}
|
||||
n.children = []*node{child}
|
||||
|
||||
return
|
||||
}
|
||||
}
|
||||
|
||||
// insert remaining path part and handle to the leaf
|
||||
n.path = path[offset:]
|
||||
n.handlers = handlers
|
||||
}
|
||||
|
||||
// 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, po Params) (handlers []HandlerFunc, p Params, tsr bool) {
|
||||
walk: // Outer loop for walking the tree
|
||||
for {
|
||||
if len(path) > len(n.path) {
|
||||
if path[:len(n.path)] == n.path {
|
||||
path = path[len(n.path):]
|
||||
// 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 {
|
||||
c := path[0]
|
||||
for i := 0; i < len(n.indices); i++ {
|
||||
if c == n.indices[i] {
|
||||
n = n.children[i]
|
||||
continue walk
|
||||
}
|
||||
}
|
||||
|
||||
// Nothing found.
|
||||
// We can recommend to redirect to the same URL without a
|
||||
// trailing slash if a leaf exists for that path.
|
||||
tsr = (path == "/" && n.handlers != nil)
|
||||
return
|
||||
|
||||
}
|
||||
|
||||
// handle wildcard child
|
||||
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++
|
||||
}
|
||||
|
||||
// save param value
|
||||
if p == nil {
|
||||
if cap(po) < int(n.maxParams) {
|
||||
p = make(Params, 0, n.maxParams)
|
||||
} else {
|
||||
p = po[0:0]
|
||||
}
|
||||
}
|
||||
i := len(p)
|
||||
p = p[:i+1] // expand slice within preallocated capacity
|
||||
p[i].Key = n.path[1:]
|
||||
p[i].Value = path[:end]
|
||||
|
||||
// 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
|
||||
tsr = (len(path) == end+1)
|
||||
return
|
||||
}
|
||||
|
||||
if handlers = n.handlers; handlers != nil {
|
||||
return
|
||||
} else 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]
|
||||
tsr = (n.path == "/" && n.handlers != nil)
|
||||
}
|
||||
|
||||
return
|
||||
|
||||
case catchAll:
|
||||
// save param value
|
||||
if p == nil {
|
||||
if cap(po) < int(n.maxParams) {
|
||||
p = make(Params, 0, n.maxParams)
|
||||
} else {
|
||||
p = po[0:0]
|
||||
}
|
||||
}
|
||||
i := len(p)
|
||||
p = p[:i+1] // expand slice within preallocated capacity
|
||||
p[i].Key = n.path[2:]
|
||||
p[i].Value = path
|
||||
|
||||
handlers = n.handlers
|
||||
return
|
||||
|
||||
default:
|
||||
panic("Invalid node type")
|
||||
}
|
||||
}
|
||||
} else if path == n.path {
|
||||
// We should have reached the node containing the handle.
|
||||
// Check if this node has a handle registered.
|
||||
if handlers = n.handlers; handlers != nil {
|
||||
return
|
||||
}
|
||||
|
||||
// No handle found. Check if a handle for this path + a
|
||||
// trailing slash exists for trailing slash recommendation
|
||||
for i := 0; i < len(n.indices); i++ {
|
||||
if n.indices[i] == '/' {
|
||||
n = n.children[i]
|
||||
tsr = (len(n.path) == 1 && n.handlers != nil) ||
|
||||
(n.nType == catchAll && n.children[0].handlers != nil)
|
||||
return
|
||||
}
|
||||
}
|
||||
|
||||
return
|
||||
}
|
||||
|
||||
// Nothing found. We can recommend to redirect to the same URL with an
|
||||
// extra trailing slash if a leaf exists for that path
|
||||
tsr = (path == "/") ||
|
||||
(len(n.path) == len(path)+1 && n.path[len(path)] == '/' &&
|
||||
path == n.path[:len(n.path)-1] && n.handlers != nil)
|
||||
return
|
||||
}
|
||||
}
|
||||
|
||||
// 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) (ciPath []byte, found bool) {
|
||||
ciPath = make([]byte, 0, len(path)+1) // preallocate enough memory
|
||||
|
||||
// Outer loop for walking the tree
|
||||
for len(path) >= len(n.path) && strings.ToLower(path[:len(n.path)]) == strings.ToLower(n.path) {
|
||||
path = path[len(n.path):]
|
||||
ciPath = append(ciPath, n.path...)
|
||||
|
||||
if len(path) > 0 {
|
||||
// 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 {
|
||||
r := unicode.ToLower(rune(path[0]))
|
||||
for i, index := range n.indices {
|
||||
// must use recursive approach since both index and
|
||||
// ToLower(index) could exist. We must check both.
|
||||
if r == unicode.ToLower(index) {
|
||||
out, found := n.children[i].findCaseInsensitivePath(path, fixTrailingSlash)
|
||||
if found {
|
||||
return append(ciPath, out...), true
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// Nothing found. We can recommend to redirect to the same URL
|
||||
// without a trailing slash if a leaf exists for that path
|
||||
found = (fixTrailingSlash && path == "/" && n.handlers != nil)
|
||||
return
|
||||
}
|
||||
|
||||
n = n.children[0]
|
||||
switch n.nType {
|
||||
case param:
|
||||
// find param end (either '/' or path end)
|
||||
k := 0
|
||||
for k < len(path) && path[k] != '/' {
|
||||
k++
|
||||
}
|
||||
|
||||
// add param value to case insensitive path
|
||||
ciPath = append(ciPath, path[:k]...)
|
||||
|
||||
// we need to go deeper!
|
||||
if k < len(path) {
|
||||
if len(n.children) > 0 {
|
||||
path = path[k:]
|
||||
n = n.children[0]
|
||||
continue
|
||||
}
|
||||
|
||||
// ... but we can't
|
||||
if fixTrailingSlash && len(path) == k+1 {
|
||||
return ciPath, true
|
||||
}
|
||||
return
|
||||
}
|
||||
|
||||
if n.handlers != nil {
|
||||
return ciPath, true
|
||||
} else 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, '/'), true
|
||||
}
|
||||
}
|
||||
return
|
||||
|
||||
case catchAll:
|
||||
return append(ciPath, path...), true
|
||||
|
||||
default:
|
||||
panic("Invalid node type")
|
||||
}
|
||||
} else {
|
||||
// We should have reached the node containing the handle.
|
||||
// Check if this node has a handle registered.
|
||||
if n.handlers != nil {
|
||||
return ciPath, true
|
||||
}
|
||||
|
||||
// No handle found.
|
||||
// Try to fix the path by adding a trailing slash
|
||||
if fixTrailingSlash {
|
||||
for i := 0; i < len(n.indices); i++ {
|
||||
if n.indices[i] == '/' {
|
||||
n = n.children[i]
|
||||
if (len(n.path) == 1 && n.handlers != nil) ||
|
||||
(n.nType == catchAll && n.children[0].handlers != nil) {
|
||||
return append(ciPath, '/'), true
|
||||
}
|
||||
return
|
||||
}
|
||||
}
|
||||
}
|
||||
return
|
||||
}
|
||||
}
|
||||
|
||||
// Nothing found.
|
||||
// Try to fix the path by adding / removing a trailing slash
|
||||
if fixTrailingSlash {
|
||||
if path == "/" {
|
||||
return ciPath, true
|
||||
}
|
||||
if len(path)+1 == len(n.path) && n.path[len(path)] == '/' &&
|
||||
strings.ToLower(path) == strings.ToLower(n.path[:len(path)]) &&
|
||||
n.handlers != nil {
|
||||
return append(ciPath, n.path...), true
|
||||
}
|
||||
}
|
||||
return
|
||||
}
|
||||
35
utils.go
35
utils.go
|
|
@ -12,6 +12,18 @@ import (
|
|||
"strings"
|
||||
)
|
||||
|
||||
const (
|
||||
methodGET = iota
|
||||
methodPOST = iota
|
||||
methodPUT = iota
|
||||
methodAHEAD = iota
|
||||
methodOPTIONS = iota
|
||||
methodDELETE = iota
|
||||
methodCONNECT = iota
|
||||
methodTRACE = iota
|
||||
methodUnknown = iota
|
||||
)
|
||||
|
||||
type H map[string]interface{}
|
||||
|
||||
// Allows type H to be used with xml.Marshal
|
||||
|
|
@ -80,3 +92,26 @@ func lastChar(str string) uint8 {
|
|||
func nameOfFunction(f interface{}) string {
|
||||
return runtime.FuncForPC(reflect.ValueOf(f).Pointer()).Name()
|
||||
}
|
||||
|
||||
func codeForHTTPMethod(method string) int {
|
||||
switch method {
|
||||
case "GET":
|
||||
return methodGET
|
||||
case "POST":
|
||||
return methodPOST
|
||||
case "PUT":
|
||||
return methodPUT
|
||||
case "AHEAD":
|
||||
return methodAHEAD
|
||||
case "OPTIONS":
|
||||
return methodOPTIONS
|
||||
case "DELETE":
|
||||
return methodDELETE
|
||||
case "TRACE":
|
||||
return methodTRACE
|
||||
case "CONNECT":
|
||||
return methodCONNECT
|
||||
default:
|
||||
return methodUnknown
|
||||
}
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in New Issue