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handle level 1 router
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add more comments

update comment

add example

fix benchmark not found

add comment and update test method
gin_integration_test.go#L407

update comment and lastedNode directly assign current node

optimize code

Optimize the search next router logic

optimize code

Adjust the matching rules

Adjust the matching order

update condition code
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@qm012
qm012 committed Jul 1, 2021
1 parent 690aa2b commit 3fc08c9
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Showing 4 changed files with 129 additions and 33 deletions.
2 changes: 1 addition & 1 deletion .gitignore
View file
Expand Up @@ -4,4 +4,4 @@ coverage.out
count.out
test
profile.out
tmp.out
tmp.out
48 changes: 45 additions & 3 deletions gin_integration_test.go
View file
Expand Up @@ -22,21 +22,33 @@ import (
"github.com/stretchr/testify/assert"
)

func testRequest(t *testing.T, url string) {
// params[0]=url example:http://127.0.0.1:8080/index (cannot be empty)
// params[1]=response body (custom compare content)
func testRequest(t *testing.T, params ...string) {

if len(params) == 0 {
t.Fatal("url cannot be empty")
}

tr := &http.Transport{
TLSClientConfig: &tls.Config{
InsecureSkipVerify: true,
},
}
client := &http.Client{Transport: tr}

resp, err := client.Get(url)
resp, err := client.Get(params[0])
assert.NoError(t, err)
defer resp.Body.Close()

body, ioerr := ioutil.ReadAll(resp.Body)
assert.NoError(t, ioerr)
assert.Equal(t, "it worked", string(body), "resp body should match")

var expected = "it worked"
if len(params) > 1 {
expected = params[1]
}
assert.Equal(t, expected, string(body), "resp body should match")
assert.Equal(t, "200 OK", resp.Status, "should get a 200")
}

Expand Down Expand Up @@ -373,3 +385,33 @@ func testGetRequestHandler(t *testing.T, h http.Handler, url string) {
assert.Equal(t, "it worked", w.Body.String(), "resp body should match")
assert.Equal(t, 200, w.Code, "should get a 200")
}

func TestRunDynamicRouting(t *testing.T) {
router := New()
router.GET("/aa/*xx", func(c *Context) { c.String(http.StatusOK, "/aa/*xx") })
router.GET("/ab/*xx", func(c *Context) { c.String(http.StatusOK, "/ab/*xx") })
router.GET("/", func(c *Context) { c.String(http.StatusOK, "home") })
router.GET("/:cc", func(c *Context) { c.String(http.StatusOK, "/:cc") })
router.GET("/:cc/cc", func(c *Context) { c.String(http.StatusOK, "/:cc/cc") })
router.GET("/get/test/abc/", func(c *Context) { c.String(http.StatusOK, "/get/test/abc/") })
router.GET("/get/:param/abc/", func(c *Context) { c.String(http.StatusOK, "/get/:param/abc/") })

ts := httptest.NewServer(router)
defer ts.Close()

testRequest(t, ts.URL+"/", "home")
testRequest(t, ts.URL+"/aa/aa", "/aa/*xx")
testRequest(t, ts.URL+"/ab/ab", "/ab/*xx")
testRequest(t, ts.URL+"/all", "/:cc")
testRequest(t, ts.URL+"/all/cc", "/:cc/cc")
testRequest(t, ts.URL+"/a/cc", "/:cc/cc")
testRequest(t, ts.URL+"/a", "/:cc")
testRequest(t, ts.URL+"/get/test/abc/", "/get/test/abc/")
testRequest(t, ts.URL+"/get/te/abc/", "/get/:param/abc/")
testRequest(t, ts.URL+"/get/xx/abc/", "/get/:param/abc/")
testRequest(t, ts.URL+"/get/tt/abc/", "/get/:param/abc/")
testRequest(t, ts.URL+"/get/a/abc/", "/get/:param/abc/")
testRequest(t, ts.URL+"/get/t/abc/", "/get/:param/abc/")
testRequest(t, ts.URL+"/get/aa/abc/", "/get/:param/abc/")
testRequest(t, ts.URL+"/get/abas/abc/", "/get/:param/abc/")
}
86 changes: 59 additions & 27 deletions tree.go
View file
Expand Up @@ -118,11 +118,6 @@ type node struct {
fullPath string
}

type skip struct {
path string
paramNode *node
}

// Increments priority of the given child and reorders if necessary
func (n *node) incrementChildPrio(pos int) int {
cs := n.children
Expand Down Expand Up @@ -405,7 +400,23 @@ type nodeValue struct {
// made if a handle exists with an extra (without the) trailing slash for the
// given path.
func (n *node) getValue(path string, params *Params, unescape bool) (value nodeValue) {
var skipped *skip
// path: /abc/123/def
// level 1 router:abc
// level 2 router:123
// level 3 router:def
var (
skippedPath string
latestNode = n // not found `level 2 router` use latestNode

// match '/' count
// matchNum < 1: `level 2 router` not found,the current node needs to be equal to latestNode
// matchNum >= 1: `level (2 or 3 or 4 or ...) router`: Normal handling
matchNum int // each match will accumulate
)
// if path = '/', no need to look for router
if len(path) == 1 {
matchNum = 1
}

walk: // Outer loop for walking the tree
for {
Expand All @@ -418,32 +429,41 @@ walk: // Outer loop for walking the tree
idxc := path[0]
for i, c := range []byte(n.indices) {
if c == idxc {
if strings.HasPrefix(n.children[len(n.children)-1].path, ":") {
skipped = &skip{
path: prefix + path,
paramNode: &node{
path: n.path,
wildChild: n.wildChild,
nType: n.nType,
priority: n.priority,
children: n.children,
handlers: n.handlers,
fullPath: n.fullPath,
},
// strings.HasPrefix(n.children[len(n.children)-1].path, ":") == n.wildChild
if n.wildChild {
skippedPath = prefix + path
latestNode = &node{
path: n.path,
wildChild: n.wildChild,
nType: n.nType,
priority: n.priority,
children: n.children,
handlers: n.handlers,
fullPath: n.fullPath,
}
}

n = n.children[i]

// match '/', If this condition is matched, the next route is found
if len(n.fullPath) != 0 && n.wildChild {
matchNum++
}
continue walk
}
}

// level 2 router not found,the current node needs to be equal to latestNode
if matchNum < 1 {
n = latestNode
}

// If there is no wildcard pattern, recommend a redirection
if !n.wildChild {
// 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)
value.tsr = path == "/" && n.handlers != nil
return
}

Expand Down Expand Up @@ -483,6 +503,16 @@ walk: // Outer loop for walking the tree
if len(n.children) > 0 {
path = path[end:]
n = n.children[0]
// next node,the latestNode needs to be equal to currentNode and handle next router
latestNode = n
// not found router in (level 1 router and handle next node),skipped cannot execute
// example:
// * /:cc/cc
// call /a/cc expectations:match/200 Actual:match/200
// call /a/dd expectations:unmatch/404 Actual: panic
// call /addr/dd/aa expectations:unmatch/404 Actual: panic
// skippedPath: It can only be executed if the secondary route is not found
skippedPath = ""
continue walk
}

Expand Down Expand Up @@ -533,8 +563,12 @@ walk: // Outer loop for walking the tree
}
}
}

// path = n.path
if path == prefix {
// level 2 router not found and latestNode.wildChild is ture
if matchNum < 1 && latestNode.wildChild {
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 {
Expand Down Expand Up @@ -564,18 +598,16 @@ walk: // Outer loop for walking the tree
return
}

if path != "/" && skipped != nil && strings.HasSuffix(skipped.path, path) {
path = skipped.path
n = skipped.paramNode
skipped = nil
if path != "/" && strings.HasSuffix(skippedPath, path) {
path = skippedPath
n = latestNode
skippedPath = ""
continue walk
}

// 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)
value.tsr = true
return
}
}
Expand Down
26 changes: 24 additions & 2 deletions tree_test.go
View file
Expand Up @@ -154,6 +154,12 @@ func TestTreeWildcard(t *testing.T) {
"/info/:user/public",
"/info/:user/project/:project",
"/info/:user/project/golang",
"/aa/*xx",
"/ab/*xx",
"/:cc",
"/:cc/cc",
"/get/test/abc/",
"/get/:param/abc/",
}
for _, route := range routes {
tree.addRoute(route, fakeHandler(route))
Expand Down Expand Up @@ -186,6 +192,22 @@ func TestTreeWildcard(t *testing.T) {
{"/info/gordon/public", false, "/info/:user/public", Params{Param{Key: "user", Value: "gordon"}}},
{"/info/gordon/project/go", false, "/info/:user/project/:project", Params{Param{Key: "user", Value: "gordon"}, Param{Key: "project", Value: "go"}}},
{"/info/gordon/project/golang", false, "/info/:user/project/golang", Params{Param{Key: "user", Value: "gordon"}}},
{"/aa/aa", false, "/aa/*xx", Params{Param{Key: "xx", Value: "/aa"}}},
{"/ab/ab", false, "/ab/*xx", Params{Param{Key: "xx", Value: "/ab"}}},
{"/a", false, "/:cc", Params{Param{Key: "cc", Value: "a"}}},
// * level 1 router match param will be Intercept first
// new PR handle (/all /all/cc /a/cc)
{"/all", false, "/:cc", Params{Param{Key: "cc", Value: "ll"}}},
{"/all/cc", false, "/:cc/cc", Params{Param{Key: "cc", Value: "ll"}}},
{"/a/cc", false, "/:cc/cc", Params{Param{Key: "cc", Value: ""}}},
{"/get/test/abc/", false, "/get/test/abc/", nil},
{"/get/te/abc/", false, "/get/:param/abc/", Params{Param{Key: "param", Value: "te"}}},
{"/get/xx/abc/", false, "/get/:param/abc/", Params{Param{Key: "param", Value: "xx"}}},
{"/get/tt/abc/", false, "/get/:param/abc/", Params{Param{Key: "param", Value: "tt"}}},
{"/get/a/abc/", false, "/get/:param/abc/", Params{Param{Key: "param", Value: "a"}}},
{"/get/t/abc/", false, "/get/:param/abc/", Params{Param{Key: "param", Value: "t"}}},
{"/get/aa/abc/", false, "/get/:param/abc/", Params{Param{Key: "param", Value: "aa"}}},
{"/get/abas/abc/", false, "/get/:param/abc/", Params{Param{Key: "param", Value: "abas"}}},
})

checkPriorities(t, tree)
Expand Down Expand Up @@ -565,8 +587,8 @@ func TestTreeFindCaseInsensitivePath(t *testing.T) {
"/u/öpfêl",
"/v/Äpfêl/",
"/v/Öpfêl",
"/w/♬", // 3 byte
"/w/♭/", // 3 byte, last byte differs
"/w/♬", // 3 byte
"/w/♭/", // 3 byte, last byte differs
"/w/𠜎", // 4 byte
"/w/𠜏/", // 4 byte
longPath,
Expand Down

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