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fix gin-gonic#2762 (gin-gonic#2767)
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(cherry picked from commit d4ca9a0)
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@qm012 @Bisstocuz
qm012 authored and Bisstocuz committed Nov 22, 2021
1 parent 4ab93db commit 1e6d649
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Showing 3 changed files with 98 additions and 108 deletions.
82 changes: 0 additions & 82 deletions gin_integration_test.go
View file
Expand Up @@ -410,25 +410,6 @@ func TestTreeRunDynamicRouting(t *testing.T) {
router.GET("/get/:param/abc/", func(c *Context) { c.String(http.StatusOK, "/get/:param/abc/") })
router.GET("/something/:paramname/thirdthing", func(c *Context) { c.String(http.StatusOK, "/something/:paramname/thirdthing") })
router.GET("/something/secondthing/test", func(c *Context) { c.String(http.StatusOK, "/something/secondthing/test") })
router.GET("/get/abc", func(c *Context) { c.String(http.StatusOK, "/get/abc") })
router.GET("/get/:param", func(c *Context) { c.String(http.StatusOK, "/get/:param") })
router.GET("/get/abc/123abc", func(c *Context) { c.String(http.StatusOK, "/get/abc/123abc") })
router.GET("/get/abc/:param", func(c *Context) { c.String(http.StatusOK, "/get/abc/:param") })
router.GET("/get/abc/123abc/xxx8", func(c *Context) { c.String(http.StatusOK, "/get/abc/123abc/xxx8") })
router.GET("/get/abc/123abc/:param", func(c *Context) { c.String(http.StatusOK, "/get/abc/123abc/:param") })
router.GET("/get/abc/123abc/xxx8/1234", func(c *Context) { c.String(http.StatusOK, "/get/abc/123abc/xxx8/1234") })
router.GET("/get/abc/123abc/xxx8/:param", func(c *Context) { c.String(http.StatusOK, "/get/abc/123abc/xxx8/:param") })
router.GET("/get/abc/123abc/xxx8/1234/ffas", func(c *Context) { c.String(http.StatusOK, "/get/abc/123abc/xxx8/1234/ffas") })
router.GET("/get/abc/123abc/xxx8/1234/:param", func(c *Context) { c.String(http.StatusOK, "/get/abc/123abc/xxx8/1234/:param") })
router.GET("/get/abc/123abc/xxx8/1234/kkdd/12c", func(c *Context) { c.String(http.StatusOK, "/get/abc/123abc/xxx8/1234/kkdd/12c") })
router.GET("/get/abc/123abc/xxx8/1234/kkdd/:param", func(c *Context) { c.String(http.StatusOK, "/get/abc/123abc/xxx8/1234/kkdd/:param") })
router.GET("/get/abc/:param/test", func(c *Context) { c.String(http.StatusOK, "/get/abc/:param/test") })
router.GET("/get/abc/123abd/:param", func(c *Context) { c.String(http.StatusOK, "/get/abc/123abd/:param") })
router.GET("/get/abc/123abddd/:param", func(c *Context) { c.String(http.StatusOK, "/get/abc/123abddd/:param") })
router.GET("/get/abc/123/:param", func(c *Context) { c.String(http.StatusOK, "/get/abc/123/:param") })
router.GET("/get/abc/123abg/:param", func(c *Context) { c.String(http.StatusOK, "/get/abc/123abg/:param") })
router.GET("/get/abc/123abf/:param", func(c *Context) { c.String(http.StatusOK, "/get/abc/123abf/:param") })
router.GET("/get/abc/123abfff/:param", func(c *Context) { c.String(http.StatusOK, "/get/abc/123abfff/:param") })

ts := httptest.NewServer(router)
defer ts.Close()
Expand All @@ -443,26 +424,8 @@ func TestTreeRunDynamicRouting(t *testing.T) {
testRequest(t, ts.URL+"/c/d/e/ff", "", "/:cc/:dd/:ee/ff")
testRequest(t, ts.URL+"/c/d/e/f/gg", "", "/:cc/:dd/:ee/:ff/gg")
testRequest(t, ts.URL+"/c/d/e/f/g/hh", "", "/:cc/:dd/:ee/:ff/:gg/hh")
testRequest(t, ts.URL+"/cc/dd/ee/ff/gg/hh", "", "/:cc/:dd/:ee/:ff/:gg/hh")
testRequest(t, ts.URL+"/a", "", "/:cc")
testRequest(t, ts.URL+"/d", "", "/:cc")
testRequest(t, ts.URL+"/ad", "", "/:cc")
testRequest(t, ts.URL+"/dd", "", "/:cc")
testRequest(t, ts.URL+"/aa", "", "/:cc")
testRequest(t, ts.URL+"/aaa", "", "/:cc")
testRequest(t, ts.URL+"/aaa/cc", "", "/:cc/cc")
testRequest(t, ts.URL+"/ab", "", "/:cc")
testRequest(t, ts.URL+"/abb", "", "/:cc")
testRequest(t, ts.URL+"/abb/cc", "", "/:cc/cc")
testRequest(t, ts.URL+"/dddaa", "", "/:cc")
testRequest(t, ts.URL+"/allxxxx", "", "/:cc")
testRequest(t, ts.URL+"/alldd", "", "/:cc")
testRequest(t, ts.URL+"/cc/cc", "", "/:cc/cc")
testRequest(t, ts.URL+"/ccc/cc", "", "/:cc/cc")
testRequest(t, ts.URL+"/deedwjfs/cc", "", "/:cc/cc")
testRequest(t, ts.URL+"/acllcc/cc", "", "/:cc/cc")
testRequest(t, ts.URL+"/get/test/abc/", "", "/get/test/abc/")
testRequest(t, ts.URL+"/get/testaa/abc/", "", "/get/:param/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/")
Expand All @@ -471,55 +434,10 @@ func TestTreeRunDynamicRouting(t *testing.T) {
testRequest(t, ts.URL+"/get/aa/abc/", "", "/get/:param/abc/")
testRequest(t, ts.URL+"/get/abas/abc/", "", "/get/:param/abc/")
testRequest(t, ts.URL+"/something/secondthing/test", "", "/something/secondthing/test")
testRequest(t, ts.URL+"/something/secondthingaaaa/thirdthing", "", "/something/:paramname/thirdthing")
testRequest(t, ts.URL+"/something/abcdad/thirdthing", "", "/something/:paramname/thirdthing")
testRequest(t, ts.URL+"/something/se/thirdthing", "", "/something/:paramname/thirdthing")
testRequest(t, ts.URL+"/something/s/thirdthing", "", "/something/:paramname/thirdthing")
testRequest(t, ts.URL+"/something/secondthing/thirdthing", "", "/something/:paramname/thirdthing")
testRequest(t, ts.URL+"/get/abc", "", "/get/abc")
testRequest(t, ts.URL+"/get/a", "", "/get/:param")
testRequest(t, ts.URL+"/get/abz", "", "/get/:param")
testRequest(t, ts.URL+"/get/12a", "", "/get/:param")
testRequest(t, ts.URL+"/get/abcd", "", "/get/:param")
testRequest(t, ts.URL+"/get/abc/123abc", "", "/get/abc/123abc")
testRequest(t, ts.URL+"/get/abc/12", "", "/get/abc/:param")
testRequest(t, ts.URL+"/get/abc/123ab", "", "/get/abc/:param")
testRequest(t, ts.URL+"/get/abc/xyz", "", "/get/abc/:param")
testRequest(t, ts.URL+"/get/abc/123abcddxx", "", "/get/abc/:param")
testRequest(t, ts.URL+"/get/abc/123abc/xxx8", "", "/get/abc/123abc/xxx8")
testRequest(t, ts.URL+"/get/abc/123abc/x", "", "/get/abc/123abc/:param")
testRequest(t, ts.URL+"/get/abc/123abc/xxx", "", "/get/abc/123abc/:param")
testRequest(t, ts.URL+"/get/abc/123abc/abc", "", "/get/abc/123abc/:param")
testRequest(t, ts.URL+"/get/abc/123abc/xxx8xxas", "", "/get/abc/123abc/:param")
testRequest(t, ts.URL+"/get/abc/123abc/xxx8/1234", "", "/get/abc/123abc/xxx8/1234")
testRequest(t, ts.URL+"/get/abc/123abc/xxx8/1", "", "/get/abc/123abc/xxx8/:param")
testRequest(t, ts.URL+"/get/abc/123abc/xxx8/123", "", "/get/abc/123abc/xxx8/:param")
testRequest(t, ts.URL+"/get/abc/123abc/xxx8/78k", "", "/get/abc/123abc/xxx8/:param")
testRequest(t, ts.URL+"/get/abc/123abc/xxx8/1234xxxd", "", "/get/abc/123abc/xxx8/:param")
testRequest(t, ts.URL+"/get/abc/123abc/xxx8/1234/ffas", "", "/get/abc/123abc/xxx8/1234/ffas")
testRequest(t, ts.URL+"/get/abc/123abc/xxx8/1234/f", "", "/get/abc/123abc/xxx8/1234/:param")
testRequest(t, ts.URL+"/get/abc/123abc/xxx8/1234/ffa", "", "/get/abc/123abc/xxx8/1234/:param")
testRequest(t, ts.URL+"/get/abc/123abc/xxx8/1234/kka", "", "/get/abc/123abc/xxx8/1234/:param")
testRequest(t, ts.URL+"/get/abc/123abc/xxx8/1234/ffas321", "", "/get/abc/123abc/xxx8/1234/:param")
testRequest(t, ts.URL+"/get/abc/123abc/xxx8/1234/kkdd/12c", "", "/get/abc/123abc/xxx8/1234/kkdd/12c")
testRequest(t, ts.URL+"/get/abc/123abc/xxx8/1234/kkdd/1", "", "/get/abc/123abc/xxx8/1234/kkdd/:param")
testRequest(t, ts.URL+"/get/abc/123abc/xxx8/1234/kkdd/12", "", "/get/abc/123abc/xxx8/1234/kkdd/:param")
testRequest(t, ts.URL+"/get/abc/123abc/xxx8/1234/kkdd/12b", "", "/get/abc/123abc/xxx8/1234/kkdd/:param")
testRequest(t, ts.URL+"/get/abc/123abc/xxx8/1234/kkdd/34", "", "/get/abc/123abc/xxx8/1234/kkdd/:param")
testRequest(t, ts.URL+"/get/abc/123abc/xxx8/1234/kkdd/12c2e3", "", "/get/abc/123abc/xxx8/1234/kkdd/:param")
testRequest(t, ts.URL+"/get/abc/12/test", "", "/get/abc/:param/test")
testRequest(t, ts.URL+"/get/abc/123abdd/test", "", "/get/abc/:param/test")
testRequest(t, ts.URL+"/get/abc/123abdddf/test", "", "/get/abc/:param/test")
testRequest(t, ts.URL+"/get/abc/123ab/test", "", "/get/abc/:param/test")
testRequest(t, ts.URL+"/get/abc/123abgg/test", "", "/get/abc/:param/test")
testRequest(t, ts.URL+"/get/abc/123abff/test", "", "/get/abc/:param/test")
testRequest(t, ts.URL+"/get/abc/123abffff/test", "", "/get/abc/:param/test")
testRequest(t, ts.URL+"/get/abc/123abd/test", "", "/get/abc/123abd/:param")
testRequest(t, ts.URL+"/get/abc/123abddd/test", "", "/get/abc/123abddd/:param")
testRequest(t, ts.URL+"/get/abc/123/test22", "", "/get/abc/123/:param")
testRequest(t, ts.URL+"/get/abc/123abg/test", "", "/get/abc/123abg/:param")
testRequest(t, ts.URL+"/get/abc/123abf/testss", "", "/get/abc/123abf/:param")
testRequest(t, ts.URL+"/get/abc/123abfff/te", "", "/get/abc/123abfff/:param")
// 404 not found
testRequest(t, ts.URL+"/a/dd", "404 Not Found")
testRequest(t, ts.URL+"/addr/dd/aa", "404 Not Found")
Expand Down
88 changes: 62 additions & 26 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 tree node
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) || path[len(path)-1] == '/' {
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 +503,18 @@ 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),skippedPath 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
// matchNum: Go to the next level of routing tree node search,need add matchNum
skippedPath = ""
matchNum++
continue walk
}

Expand Down Expand Up @@ -535,6 +567,10 @@ walk: // Outer loop for walking the tree
}

if path == prefix {
// level 2 router not found and latestNode.wildChild is true
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 +600,18 @@ 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
// path != "/" && skippedPath != ""
if len(path) != 1 && len(skippedPath) > 0 && 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 = path == "/" ||
(len(prefix) == len(path)+1 && n.handlers != nil)
return
}
}
Expand Down
36 changes: 36 additions & 0 deletions tree_test.go
View file
Expand Up @@ -154,6 +154,18 @@ func TestTreeWildcard(t *testing.T) {
"/info/:user/public",
"/info/:user/project/:project",
"/info/:user/project/golang",
"/aa/*xx",
"/ab/*xx",
"/:cc",
"/:cc/cc",
"/:cc/:dd/ee",
"/:cc/:dd/:ee/ff",
"/:cc/:dd/:ee/:ff/gg",
"/:cc/:dd/:ee/:ff/:gg/hh",
"/get/test/abc/",
"/get/:param/abc/",
"/something/:paramname/thirdthing",
"/something/secondthing/test",
}
for _, route := range routes {
tree.addRoute(route, fakeHandler(route))
Expand Down Expand Up @@ -186,6 +198,30 @@ 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"}}},
{"/something/secondthing/test", false, "/something/secondthing/test", nil},
{"/something/abcdad/thirdthing", false, "/something/:paramname/thirdthing", Params{Param{Key: "paramname", Value: "abcdad"}}},
{"/something/se/thirdthing", false, "/something/:paramname/thirdthing", Params{Param{Key: "paramname", Value: "se"}}},
{"/something/s/thirdthing", false, "/something/:paramname/thirdthing", Params{Param{Key: "paramname", Value: "s"}}},
{"/c/d/ee", false, "/:cc/:dd/ee", Params{Param{Key: "cc", Value: "c"}, Param{Key: "dd", Value: "d"}}},
{"/c/d/e/ff", false, "/:cc/:dd/:ee/ff", Params{Param{Key: "cc", Value: "c"}, Param{Key: "dd", Value: "d"}, Param{Key: "ee", Value: "e"}}},
{"/c/d/e/f/gg", false, "/:cc/:dd/:ee/:ff/gg", Params{Param{Key: "cc", Value: "c"}, Param{Key: "dd", Value: "d"}, Param{Key: "ee", Value: "e"}, Param{Key: "ff", Value: "f"}}},
{"/c/d/e/f/g/hh", false, "/:cc/:dd/:ee/:ff/:gg/hh", Params{Param{Key: "cc", Value: "c"}, Param{Key: "dd", Value: "d"}, Param{Key: "ee", Value: "e"}, Param{Key: "ff", Value: "f"}, Param{Key: "gg", Value: "g"}}},
})

checkPriorities(t, tree)
Expand Down

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