| package atscfg |
| |
| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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. |
| */ |
| |
| import ( |
| "sort" |
| "strconv" |
| "strings" |
| "time" |
| |
| "github.com/apache/trafficcontrol/lib/go-tc" |
| ) |
| |
| const RegexRemapPrefix = "regex_remap_" |
| const CacheUrlPrefix = "cacheurl_" |
| const RefetchSuffix = "##REFETCH##" |
| const RefreshSuffix = "##REFRESH##" |
| |
| const RemapFile = "remap.config" |
| |
| const RegexRevalidateFileName = "regex_revalidate.config" |
| const RegexRevalidateMaxRevalDurationDaysParamName = "maxRevalDurationDays" |
| const DefaultMaxRevalDurationDays = 90 |
| const JobKeywordPurge = "PURGE" |
| const RegexRevalidateMinTTL = time.Hour |
| |
| type RevalType string |
| |
| const RevalTypeMiss = RevalType("MISS") |
| const RevalTypeStale = RevalType("STALE") |
| const RevalTypeDefault = RevalTypeStale |
| |
| const ContentTypeRegexRevalidateDotConfig = ContentTypeTextASCII |
| const LineCommentRegexRevalidateDotConfig = LineCommentHash |
| |
| // RegexRevalidateDotConfigOpts contains settings to configure generation options. |
| type RegexRevalidateDotConfigOpts struct { |
| // HdrComment is the header comment to include at the beginning of the file. |
| // This should be the text desired, without comment syntax (like # or //). The file's comment syntax will be added. |
| // To omit the header comment, pass the empty string. |
| HdrComment string |
| } |
| |
| func MakeRegexRevalidateDotConfig( |
| server *Server, |
| deliveryServices []DeliveryService, |
| globalParams []tc.Parameter, |
| jobs []InvalidationJob, |
| opt *RegexRevalidateDotConfigOpts, |
| ) (Cfg, error) { |
| if opt == nil { |
| opt = &RegexRevalidateDotConfigOpts{} |
| } |
| warnings := []string{} |
| |
| if server.CDNName == nil { |
| return Cfg{}, makeErr(warnings, "server CDNName missing") |
| } |
| |
| params := paramsToMultiMap(filterParams(globalParams, RegexRevalidateFileName, "", "", "")) |
| |
| dsNames := map[string]struct{}{} |
| for _, ds := range deliveryServices { |
| if ds.XMLID == nil { |
| warnings = append(warnings, "got Delivery Service from Traffic Ops with a nil xmlId! Skipping!") |
| continue |
| } |
| dsNames[*ds.XMLID] = struct{}{} |
| } |
| |
| dsJobs := []InvalidationJob{} |
| for _, job := range jobs { |
| if job.DeliveryService == "" { |
| warnings = append(warnings, "got job from Traffic Ops with an empty DeliveryService! Skipping!") |
| continue |
| } |
| if _, ok := dsNames[job.DeliveryService]; !ok { |
| continue |
| } |
| dsJobs = append(dsJobs, job) |
| } |
| |
| // TODO: add cdn, startTime query params to /jobs endpoint |
| |
| maxDays := DefaultMaxRevalDurationDays |
| if maxDaysStrs := params[RegexRevalidateMaxRevalDurationDaysParamName]; len(maxDaysStrs) > 0 { |
| sort.Strings(maxDaysStrs) |
| err := error(nil) |
| if maxDays, err = strconv.Atoi(maxDaysStrs[0]); err != nil { // just use the first, if there were multiple params |
| warnings = append(warnings, "max days param '"+maxDaysStrs[0]+"' is not an integer, using default value!") |
| maxDays = DefaultMaxRevalDurationDays |
| } |
| } |
| |
| maxReval := time.Duration(maxDays) * time.Hour * 24 |
| |
| cfgJobs := filterJobs(dsJobs, maxReval, RegexRevalidateMinTTL) |
| |
| txt := makeHdrComment(opt.HdrComment) |
| for _, job := range cfgJobs { |
| txt += job.AssetURL + " " + strconv.FormatInt(job.PurgeEnd.Unix(), 10) |
| if job.Type != "" && job.Type != RevalTypeDefault { |
| txt += " " + string(job.Type) |
| } |
| txt += "\n" |
| } |
| |
| return Cfg{ |
| Text: txt, |
| ContentType: ContentTypeRegexRevalidateDotConfig, |
| LineComment: LineCommentRegexRevalidateDotConfig, |
| Warnings: warnings, |
| }, nil |
| } |
| |
| type revalJob struct { |
| AssetURL string |
| PurgeEnd time.Time |
| Type RevalType // RevalTypeMiss or RevalTypeStale (default) |
| } |
| |
| type jobsSort []revalJob |
| |
| func (jb jobsSort) Len() int { return len(jb) } |
| func (jb jobsSort) Swap(i, j int) { jb[i], jb[j] = jb[j], jb[i] } |
| func (jb jobsSort) Less(i, j int) bool { |
| if jb[i].AssetURL == jb[j].AssetURL { |
| return jb[i].PurgeEnd.Before(jb[j].PurgeEnd) |
| } |
| return strings.Compare(jb[i].AssetURL, jb[j].AssetURL) < 0 |
| } |
| |
| // filterJobs returns only jobs which: |
| // - have a non-empty deliveryservice |
| // - have a start time later than (now + maxReval days). That is, we don't query jobs older than maxReval in the past. |
| // - have a start_time+ttl > now. That is, jobs that haven't expired yet. |
| // Returns the filtered jobs. |
| func filterJobs(tcJobs []InvalidationJob, maxReval time.Duration, minTTL time.Duration) []revalJob { |
| |
| jobMap := map[string]revalJob{} |
| |
| for _, tcJob := range tcJobs { |
| if tcJob.DeliveryService == "" { |
| continue |
| } |
| |
| ttl := time.Duration(tcJob.TTLHours) * time.Hour |
| if ttl > maxReval { |
| ttl = maxReval |
| } else if ttl < minTTL { |
| ttl = minTTL |
| } |
| |
| if tcJob.StartTime.Add(maxReval).Before(time.Now()) { |
| continue |
| } |
| |
| if tcJob.StartTime.Add(ttl).Before(time.Now()) { |
| continue |
| } |
| |
| jobType, assetURL := processRefetch(tcJob.InvalidationType, tcJob.AssetURL) |
| |
| purgeEnd := tcJob.StartTime.Add(ttl) |
| |
| if rjob, ok := jobMap[assetURL]; !ok || purgeEnd.After(rjob.PurgeEnd) { |
| jobMap[assetURL] = revalJob{AssetURL: assetURL, PurgeEnd: purgeEnd, Type: jobType} |
| } |
| } |
| |
| newJobs := []revalJob{} |
| for _, rjob := range jobMap { |
| newJobs = append(newJobs, rjob) |
| } |
| sort.Sort(jobsSort(newJobs)) |
| |
| return newJobs |
| } |
| |
| // processRefetch determines the type of Invalidation, returns the corresponding jobtype |
| // and "cleans" the regex URL for the asset to be invalidated. REFETCH trumps REFRESH, |
| // whether in the AssetURL or as InvalidationType |
| func processRefetch(invalidationType, assetURL string) (RevalType, string) { |
| |
| if (len(invalidationType) > 0 && invalidationType == tc.REFETCH) || strings.HasSuffix(assetURL, RefetchSuffix) { |
| assetURL = strings.TrimSuffix(assetURL, RefetchSuffix) |
| return RevalTypeMiss, assetURL |
| } |
| |
| // Default value. Either the InvalidationType == REFRESH |
| // or the suffix is ##REFRESH## or neither |
| assetURL = strings.TrimSuffix(assetURL, RefreshSuffix) |
| return RevalTypeStale, assetURL |
| } |