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fix(router): tree bug where loop index is not decremented. #3460

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Jan 7, 2023
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19 changes: 19 additions & 0 deletions routes_test.go
Original file line number Diff line number Diff line change
Expand Up @@ -670,3 +670,22 @@ func TestRouteContextHoldsFullPath(t *testing.T) {
w := PerformRequest(router, http.MethodGet, "/not-found")
assert.Equal(t, http.StatusNotFound, w.Code)
}

func TestEngineHandleMethodNotAllowedCornerCase(t *testing.T) {
r := New()
r.HandleMethodNotAllowed = true

base := r.Group("base")
base.GET("/metrics", handlerTest1)

v1 := base.Group("v1")

v1.GET("/:id/devices", handlerTest1)
v1.GET("/user/:id/groups", handlerTest1)

v1.GET("/orgs/:id", handlerTest1)
v1.DELETE("/orgs/:id", handlerTest1)

w := PerformRequest(r, "GET", "/base/v1/user/groups")
assert.Equal(t, http.StatusNotFound, w.Code)
}
18 changes: 9 additions & 9 deletions tree.go
Original file line number Diff line number Diff line change
Expand Up @@ -459,9 +459,9 @@ walk: // Outer loop for walking the tree
// 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 l := len(*skippedNodes); l > 0; {
skippedNode := (*skippedNodes)[l-1]
*skippedNodes = (*skippedNodes)[:l-1]
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
Expand Down Expand Up @@ -576,9 +576,9 @@ walk: // Outer loop for walking the tree
// 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 l := len(*skippedNodes); l > 0; {
skippedNode := (*skippedNodes)[l-1]
*skippedNodes = (*skippedNodes)[:l-1]
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
Expand Down Expand Up @@ -633,9 +633,9 @@ walk: // Outer loop for walking the tree

// roll back to last valid skippedNode
if !value.tsr && path != "/" {
for l := len(*skippedNodes); l > 0; {
skippedNode := (*skippedNodes)[l-1]
*skippedNodes = (*skippedNodes)[:l-1]
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
Expand Down