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util/http: trie support method not allowed

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Signed-off-by: Vasiliy Tolstov <v.tolstov@unistack.org>
This commit is contained in:
Василий Толстов 2022-12-27 23:47:11 +03:00
parent 1687b98b11
commit 5e47cc7e8c
2 changed files with 51 additions and 25 deletions
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26
util/http/trie.go
View File

@ -7,6 +7,7 @@ package http
// Modified by Unistack LLC to support interface{} type handler and parameters in map[string]string
import (
"errors"
"fmt"
"net/http"
"regexp"
@ -15,6 +16,11 @@ import (
"strings"
)
var (
ErrNotFound = errors.New("route not found")
ErrMethodNotAllowed = errors.New("method not allowed")
)
type methodTyp uint
const (
@ -399,16 +405,19 @@ func (n *Trie) setEndpoint(method methodTyp, handler interface{}, pattern string
}
// Search try to find element in tree with path and method
func (n *Trie) Search(method string, path string) (interface{}, map[string]string, bool) {
func (n *Trie) Search(method string, path string) (interface{}, map[string]string, error) {
params := &routeParams{}
// Find the routing handlers for the path
rn := n.findRoute(params, methodMap[method], path)
if rn == nil {
return nil, nil, false
if rn == nil && !params.methodNotAllowed {
return nil, nil, ErrNotFound
}
if params.methodNotAllowed {
return nil, nil, ErrMethodNotAllowed
}
ep, ok := rn.endpoints[methodMap[method]]
if !ok {
return nil, nil, false
return nil, nil, ErrMethodNotAllowed
}
eparams := make(map[string]string, len(params.keys))
@ -416,12 +425,13 @@ func (n *Trie) Search(method string, path string) (interface{}, map[string]strin
eparams[key] = params.vals[idx]
}
return ep.handler, eparams, true
return ep.handler, eparams, nil
}
type routeParams struct {
keys []string
vals []string
keys []string
vals []string
methodNotAllowed bool
}
// Recursive edge traversal by checking all nodeTyp groups along the way.
@ -495,6 +505,7 @@ func (n *Trie) findRoute(params *routeParams, method methodTyp, path string) *Tr
params.keys = append(params.keys, h.paramKeys...)
return xn
}
params.methodNotAllowed = true
}
}
@ -530,6 +541,7 @@ func (n *Trie) findRoute(params *routeParams, method methodTyp, path string) *Tr
params.keys = append(params.keys, h.paramKeys...)
return xn
}
params.methodNotAllowed = true
}
}

50
util/http/trie_test.go
View File

@ -21,22 +21,22 @@ func TestTrieWildcardPathPrefix(t *testing.T) {
if err = tr.Insert([]string{http.MethodPost}, "/v1/*", &handler{name: "post_create"}); err != nil {
t.Fatal(err)
}
h, _, ok := tr.Search(http.MethodPost, "/v1/test/one")
if !ok {
h, _, err := tr.Search(http.MethodPost, "/v1/test/one")
if err != nil {
t.Fatalf("unexpected error handler not found")
}
if h.(*handler).name != "post_create" {
t.Fatalf("invalid handler %v", h)
}
h, _, ok = tr.Search(http.MethodPost, "/v1/update")
if !ok {
h, _, err = tr.Search(http.MethodPost, "/v1/update")
if err != nil {
t.Fatalf("unexpected error")
}
if h.(*handler).name != "post_update" {
t.Fatalf("invalid handler %v", h)
}
h, _, ok = tr.Search(http.MethodPost, "/v1/update/some/{x}")
if !ok {
h, _, err = tr.Search(http.MethodPost, "/v1/update/some/{x}")
if err != nil {
t.Fatalf("unexpected error")
}
if h.(*handler).name != "post_create" {
@ -52,8 +52,8 @@ func TestTriePathPrefix(t *testing.T) {
_ = tr.Insert([]string{http.MethodPost}, "/v1/create/{id}", &handler{name: "post_create"})
_ = tr.Insert([]string{http.MethodPost}, "/v1/update/{id}", &handler{name: "post_update"})
_ = tr.Insert([]string{http.MethodPost}, "/", &handler{name: "post_wildcard"})
h, _, ok := tr.Search(http.MethodPost, "/")
if !ok {
h, _, err := tr.Search(http.MethodPost, "/")
if err != nil {
t.Fatalf("unexpected error")
}
if h.(*handler).name != "post_wildcard" {
@ -68,8 +68,8 @@ func TestTrieFixedPattern(t *testing.T) {
tr := NewTrie()
_ = tr.Insert([]string{http.MethodPut}, "/v1/create/{id}", &handler{name: "pattern"})
_ = tr.Insert([]string{http.MethodPut}, "/v1/create/12", &handler{name: "fixed"})
h, _, ok := tr.Search(http.MethodPut, "/v1/create/12")
if !ok {
h, _, err := tr.Search(http.MethodPut, "/v1/create/12")
if err != nil {
t.Fatalf("unexpected error")
}
if h.(*handler).name != "fixed" {
@ -80,8 +80,8 @@ func TestTrieFixedPattern(t *testing.T) {
func TestTrieNoMatchMethod(t *testing.T) {
tr := NewTrie()
_ = tr.Insert([]string{http.MethodPut}, "/v1/create/{id}", nil)
_, _, ok := tr.Search(http.MethodPost, "/v1/create")
if ok {
_, _, err := tr.Search(http.MethodPost, "/v1/create")
if err == nil && err != ErrNotFound {
t.Fatalf("must be not found error")
}
}
@ -90,9 +90,9 @@ func TestTrieMatchRegexp(t *testing.T) {
type handler struct{}
tr := NewTrie()
_ = tr.Insert([]string{http.MethodPut}, "/v1/create/{category}/{id:[0-9]+}", &handler{})
_, params, ok := tr.Search(http.MethodPut, "/v1/create/test_cat/12345")
_, params, err := tr.Search(http.MethodPut, "/v1/create/test_cat/12345")
switch {
case !ok:
case err != nil:
t.Fatalf("route not found")
case len(params) != 2:
t.Fatalf("param matching error %v", params)
@ -105,8 +105,8 @@ func TestTrieMatchRegexpFail(t *testing.T) {
type handler struct{}
tr := NewTrie()
_ = tr.Insert([]string{http.MethodPut}, "/v1/create/{id:[a-z]+}", &handler{})
_, _, ok := tr.Search(http.MethodPut, "/v1/create/12345")
if ok {
_, _, err := tr.Search(http.MethodPut, "/v1/create/12345")
if err != ErrNotFound {
t.Fatalf("route must not be not found")
}
}
@ -118,14 +118,28 @@ func TestTrieMatchLongest(t *testing.T) {
tr := NewTrie()
_ = tr.Insert([]string{http.MethodPut}, "/v1/create", &handler{name: "first"})
_ = tr.Insert([]string{http.MethodPut}, "/v1/create/{id:[0-9]+}", &handler{name: "second"})
if h, _, ok := tr.Search(http.MethodPut, "/v1/create/12345"); !ok {
if h, _, err := tr.Search(http.MethodPut, "/v1/create/12345"); err != nil {
t.Fatalf("route must be found")
} else if h.(*handler).name != "second" {
t.Fatalf("invalid handler found: %s != %s", h.(*handler).name, "second")
}
if h, _, ok := tr.Search(http.MethodPut, "/v1/create"); !ok {
if h, _, err := tr.Search(http.MethodPut, "/v1/create"); err != nil {
t.Fatalf("route must be found")
} else if h.(*handler).name != "first" {
t.Fatalf("invalid handler found: %s != %s", h.(*handler).name, "first")
}
}
func TestMethodNotAllowed(t *testing.T) {
type handler struct{}
tr := NewTrie()
_ = tr.Insert([]string{http.MethodPut}, "/v1/create", &handler{})
_, _, err := tr.Search(http.MethodPost, "/v1/create")
if err != ErrMethodNotAllowed {
t.Fatalf("route must be method not allowed: %v", err)
}
_, _, err = tr.Search(http.MethodPut, "/v1/create")
if err != nil {
t.Fatalf("route must be found: %v", err)
}
}