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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,111 @@ | ||
| /* | ||
| Copyright 2020 The Kubernetes Authors. | ||
| Licensed under the Apache License, Version 2.0 (the "License"); | ||
| you may not use this file except in compliance with the License. | ||
| You may obtain a copy of the License at | ||
| http://www.apache.org/licenses/LICENSE-2.0 | ||
| Unless required by applicable law or agreed to in writing, software | ||
| distributed under the License is distributed on an "AS IS" BASIS, | ||
| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| See the License for the specific language governing permissions and | ||
| limitations under the License. | ||
| */ | ||
|
|
||
| package globalratelimit | ||
|
|
||
| import ( | ||
| "strings" | ||
| "time" | ||
|
|
||
| "github.com/pkg/errors" | ||
| networking "k8s.io/api/networking/v1beta1" | ||
|
|
||
| "k8s.io/ingress-nginx/internal/ingress/annotations/parser" | ||
| ing_errors "k8s.io/ingress-nginx/internal/ingress/errors" | ||
| "k8s.io/ingress-nginx/internal/ingress/resolver" | ||
| "k8s.io/ingress-nginx/internal/net" | ||
| "k8s.io/ingress-nginx/internal/sets" | ||
| ) | ||
|
|
||
| const defaultKey = "$remote_addr" | ||
|
|
||
| // Config encapsulates all global rate limit attributes | ||
| type Config struct { | ||
| Namespace string `json:"namespace"` | ||
| Limit int `json:"limit"` | ||
| WindowSize int `json:"window-size"` | ||
| Key string `json:"key"` | ||
| IgnoredCIDRs []string `json:"ignored-cidrs"` | ||
| } | ||
|
|
||
| // Equal tests for equality between two Config types | ||
| func (l *Config) Equal(r *Config) bool { | ||
| if l.Namespace != r.Namespace { | ||
| return false | ||
| } | ||
| if l.Limit != r.Limit { | ||
| return false | ||
| } | ||
| if l.WindowSize != r.WindowSize { | ||
| return false | ||
| } | ||
| if l.Key != r.Key { | ||
| return false | ||
| } | ||
| if len(l.IgnoredCIDRs) != len(r.IgnoredCIDRs) || !sets.StringElementsMatch(l.IgnoredCIDRs, r.IgnoredCIDRs) { | ||
| return false | ||
| } | ||
|
|
||
| return true | ||
| } | ||
|
|
||
| type globalratelimit struct { | ||
| r resolver.Resolver | ||
| } | ||
|
|
||
| // NewParser creates a new globalratelimit annotation parser | ||
| func NewParser(r resolver.Resolver) parser.IngressAnnotation { | ||
| return globalratelimit{r} | ||
| } | ||
|
|
||
| // Parse extracts globalratelimit annotations from the given ingress | ||
| // and returns them structured as Config type | ||
| func (a globalratelimit) Parse(ing *networking.Ingress) (interface{}, error) { | ||
| config := &Config{} | ||
|
|
||
| limit, _ := parser.GetIntAnnotation("global-rate-limit", ing) | ||
| rawWindowSize, _ := parser.GetStringAnnotation("global-rate-limit-window", ing) | ||
|
|
||
| if limit == 0 || len(rawWindowSize) == 0 { | ||
| return config, nil | ||
| } | ||
|
|
||
| windowSize, err := time.ParseDuration(rawWindowSize) | ||
| if err != nil { | ||
| return config, ing_errors.LocationDenied{ | ||
| Reason: errors.Wrap(err, "failed to parse 'global-rate-limit-window' value"), | ||
| } | ||
| } | ||
|
|
||
| key, _ := parser.GetStringAnnotation("global-rate-limit-key", ing) | ||
| if len(key) == 0 { | ||
| key = defaultKey | ||
| } | ||
|
|
||
| rawIgnoredCIDRs, _ := parser.GetStringAnnotation("global-rate-limit-ignored-cidrs", ing) | ||
| ignoredCIDRs, err := net.ParseCIDRs(rawIgnoredCIDRs) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| config.Namespace = strings.Replace(string(ing.UID), "-", "", -1) | ||
| config.Limit = limit | ||
| config.WindowSize = int(windowSize.Seconds()) | ||
| config.Key = key | ||
| config.IgnoredCIDRs = ignoredCIDRs | ||
|
|
||
| return config, nil | ||
| } |
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