func main() {
flag.StringVar(&seedUrl, "seed", "http://example.com", "the seed url,where everything starts")
flag.StringVar(&logLevel, "log", "info", "setting log level,options:trace,debug,info,warn,error")
flag.Parse()
defer log.Flush()
runtime.GOMAXPROCS(runtime.NumCPU())
log.SetInitLogging(logLevel)
runtimeConfig.PathConfig = new(PathConfig)
runtimeConfig.ClusterConfig = new(ClusterConfig)
runtimeConfig.ClusterConfig.Name = config.GetStringConfig("cluster", "name", "gopa")
// per cluster:data/gopa/
runtimeConfig.PathConfig.Home = config.GetStringConfig("path", "home", "cluster/"+runtimeConfig.ClusterConfig.Name+"/")
runtimeConfig.PathConfig.Data = config.GetStringConfig("path", "data", "")
if runtimeConfig.PathConfig.Data == "" {
runtimeConfig.PathConfig.Data = runtimeConfig.PathConfig.Home + "/" + "data/"
}
runtimeConfig.PathConfig.Log = config.GetStringConfig("path", "log", "")
if runtimeConfig.PathConfig.Log == "" {
runtimeConfig.PathConfig.Log = runtimeConfig.PathConfig.Home + "/" + "log/"
}
runtimeConfig.PathConfig.WebData = config.GetStringConfig("path", "webdata", "")
if runtimeConfig.PathConfig.WebData == "" {
runtimeConfig.PathConfig.WebData = runtimeConfig.PathConfig.Data + "/" + "webdata/"
}
runtimeConfig.PathConfig.TaskData = config.GetStringConfig("path", "taskdata", "")
if runtimeConfig.PathConfig.TaskData == "" {
runtimeConfig.PathConfig.TaskData = runtimeConfig.PathConfig.Data + "/" + "taskdata/"
}
runtimeConfig.StoreWebPageTogether = config.GetBoolConfig("Global", "StoreWebPageTogether", true)
runtimeConfig.TaskConfig = parseConfig()
//set default logging
logPath := runtimeConfig.PathConfig.Log + "/" + runtimeConfig.TaskConfig.Name + "/gopa.log"
log.SetLogging(logLevel, logPath)
runtimeConfig.ParseUrlsFromSavedFileLog = config.GetBoolConfig("Switch", "ParseUrlsFromSavedFileLog", true)
runtimeConfig.LoadTemplatedFetchJob = config.GetBoolConfig("Switch", "LoadTemplatedFetchJob", true)
runtimeConfig.LoadRuledFetchJob = config.GetBoolConfig("Switch", "LoadRuledFetchJob", false)
runtimeConfig.LoadPendingFetchJobs = config.GetBoolConfig("Switch", "LoadPendingFetchJobs", true)
runtimeConfig.HttpEnabled = config.GetBoolConfig("Switch", "HttpEnabled", true)
runtimeConfig.ParseUrlsFromPreviousSavedPage = config.GetBoolConfig("Switch", "ParseUrlsFromPreviousSavedPage", false)
runtimeConfig.ArrayStringSplitter = config.GetStringConfig("CrawlerRule", "ArrayStringSplitter", ",")
runtimeConfig.GoProfEnabled = config.GetBoolConfig("CrawlerRule", "GoProfEnabled", false)
runtimeConfig.WalkBloomFilterFileName = config.GetStringConfig("BloomFilter", "WalkBloomFilterFileName", runtimeConfig.TaskConfig.TaskDataPath+"/filters/walk.bloomfilter")
runtimeConfig.FetchBloomFilterFileName = config.GetStringConfig("BloomFilter", "FetchBloomFilterFileName", runtimeConfig.TaskConfig.TaskDataPath+"/filters/fetch.bloomfilter")
runtimeConfig.ParseBloomFilterFileName = config.GetStringConfig("BloomFilter", "ParseBloomFilterFileName", runtimeConfig.TaskConfig.TaskDataPath+"/filters/parse.bloomfilter")
runtimeConfig.PendingFetchBloomFilterFileName = config.GetStringConfig("BloomFilter", "PendingFetchBloomFilterFileName", runtimeConfig.TaskConfig.TaskDataPath+"/filters/pending_fetch.bloomfilter")
runtimeConfig.PathConfig.SavedFileLog = runtimeConfig.TaskConfig.TaskDataPath + "/tasks/pending_parse.files"
runtimeConfig.PathConfig.PendingFetchLog = runtimeConfig.TaskConfig.TaskDataPath + "/tasks/pending_fetch.urls"
runtimeConfig.PathConfig.FetchFailedLog = runtimeConfig.TaskConfig.TaskDataPath + "/tasks/failed_fetch.urls"
runtimeConfig.MaxGoRoutine = config.GetIntConfig("Global", "MaxGoRoutine", 2)
if runtimeConfig.MaxGoRoutine < 2 {
runtimeConfig.MaxGoRoutine = 2
}
log.Debug("maxGoRoutine:", runtimeConfig.MaxGoRoutine)
log.Debug("path.home:", runtimeConfig.PathConfig.Home)
os.MkdirAll(runtimeConfig.PathConfig.Home, 0777)
os.MkdirAll(runtimeConfig.PathConfig.Data, 0777)
os.MkdirAll(runtimeConfig.PathConfig.Log, 0777)
os.MkdirAll(runtimeConfig.PathConfig.WebData, 0777)
os.MkdirAll(runtimeConfig.PathConfig.TaskData, 0777)
os.MkdirAll(runtimeConfig.TaskConfig.TaskDataPath, 0777)
os.MkdirAll(runtimeConfig.TaskConfig.TaskDataPath+"/tasks/", 0777)
os.MkdirAll(runtimeConfig.TaskConfig.TaskDataPath+"/filters/", 0777)
os.MkdirAll(runtimeConfig.TaskConfig.TaskDataPath+"/urls/", 0777)
os.MkdirAll(runtimeConfig.TaskConfig.WebDataPath, 0777)
runtimeConfig.RuledFetchConfig = new(RuledFetchConfig)
runtimeConfig.RuledFetchConfig.UrlTemplate = config.GetStringConfig("RuledFetch", "UrlTemplate", "")
runtimeConfig.RuledFetchConfig.From = config.GetIntConfig("RuledFetch", "From", 0)
runtimeConfig.RuledFetchConfig.To = config.GetIntConfig("RuledFetch", "To", 10)
runtimeConfig.RuledFetchConfig.Step = config.GetIntConfig("RuledFetch", "Step", 1)
runtimeConfig.RuledFetchConfig.LinkExtractPattern = config.GetStringConfig("RuledFetch", "LinkExtractPattern", "")
runtimeConfig.RuledFetchConfig.LinkTemplate = config.GetStringConfig("RuledFetch", "LinkTemplate", "")
if seedUrl == "" || seedUrl == "http://example.com" {
log.Error("no seed was given. type:\"gopa -h\" for help.")
os.Exit(1)
}
log.Info("[gopa] " + runtimeConfig.Version + " is on.")
runtimeConfig.Storage = &fsstore.FsStore{}
// if(runtimeConfig.)
runtimeConfig.Storage.InitWalkBloomFilter(runtimeConfig.WalkBloomFilterFileName)
runtimeConfig.Storage.InitFetchBloomFilter(runtimeConfig.FetchBloomFilterFileName)
runtimeConfig.Storage.InitParseBloomFilter(runtimeConfig.ParseBloomFilterFileName)
runtimeConfig.Storage.InitPendingFetchBloomFilter(runtimeConfig.PendingFetchBloomFilterFileName)
// atr:="AZaz"
// btr:=[]byte(atr)
// fmt.Println(btr)
//
// id:= getSeqStr([]byte("AA"),[]byte("ZZ"),false)
// fmt.Println(id)
//pprof serves
if runtimeConfig.GoProfEnabled {
go func() {
log.Info(http.ListenAndServe("localhost:6060", nil))
log.Info("pprof server is up,http://localhost:6060/debug/pprof")
}()
}
//http serves
if runtimeConfig.HttpEnabled {
go func() {
httpServ.Start(runtimeConfig)
}()
}
//adding default http protocol
if !strings.HasPrefix(seedUrl, "http") {
seedUrl = "http://" + seedUrl
}
maxGoRoutine := runtimeConfig.MaxGoRoutine
fetchQuitChannels := make([]*chan bool, maxGoRoutine) //shutdownSignal signals for each go routing
fetchTaskChannels := make([]*chan []byte, maxGoRoutine) //fetchTask channels
fetchOffsets := make([]*RoutingOffset, maxGoRoutine) //kafka fetchOffsets
parseQuitChannels := make([]*chan bool, 2) //shutdownSignal signals for each go routing
// parseQuitChannels := make([]*chan bool, MaxGoRoutine) //shutdownSignal signals for each go routing
parseOffsets := make([]*RoutingOffset, maxGoRoutine) //kafka fetchOffsets
shutdownSignal := make(chan bool, 1)
finalQuitSignal := make(chan bool, 1)
//handle exit event
exitEventChannel := make(chan os.Signal, 1)
signal.Notify(exitEventChannel, syscall.SIGINT)
signal.Notify(exitEventChannel, os.Interrupt)
go func() {
s := <-exitEventChannel
log.Debug("got signal:", s)
if s == os.Interrupt || s.(os.Signal) == syscall.SIGINT {
log.Warn("got signal:os.Interrupt,saving data and exit")
// defer os.Exit(0)
runtimeConfig.Storage.PersistBloomFilter()
//wait workers to exit
log.Info("waiting workers exit")
go shutdown(fetchOffsets, fetchQuitChannels, parseOffsets, parseQuitChannels, shutdownSignal)
<-shutdownSignal
log.Info("workers shutdown")
finalQuitSignal <- true
}
}()
//start fetcher
for i := 0; i < maxGoRoutine; i++ {
quitC := make(chan bool, 1)
taskC := make(chan []byte)
fetchQuitChannels[i] = &quitC
fetchTaskChannels[i] = &taskC
offset := new(RoutingOffset)
// offset.Offset = initOffset(runtimeConfig, "fetch", i)
offset.Shard = i
fetchOffsets[i] = offset
go task.FetchGo(runtimeConfig, &taskC, &quitC, offset)
}
c2 := make(chan bool, 1)
parseQuitChannels[0] = &c2
offset2 := new(RoutingOffset)
// offset2.Offset = initOffset(runtimeConfig, "parse", 0)
offset2.Shard = 0
parseOffsets[0] = offset2
pendingFetchUrls := make(chan []byte)
//fetch rule:all urls -> persisted to sotre -> fetched from store -> pushed to pendingFetchUrls -> redistributed to sharded goroutines -> fetch -> save webpage to store -> done
//parse rule:url saved to store -> local path persisted to store -> fetched to pendingParseFiles -> redistributed to sharded goroutines -> parse -> clean urls -> enqueue to url store ->done
//sending feed to task queue
go func() {
//notice seed will not been persisted
log.Debug("sending feed to fetch queue,", seedUrl)
pendingFetchUrls <- []byte(seedUrl)
}()
//start local saved file parser
if runtimeConfig.ParseUrlsFromSavedFileLog {
go task.ParseGo(pendingFetchUrls, runtimeConfig, &c2, offset2)
}
//redistribute pendingFetchUrls to sharded workers
go func() {
for {
url := <-pendingFetchUrls
if !runtimeConfig.Storage.CheckWalkedUrl(url) {
if runtimeConfig.Storage.CheckFetchedUrl(url) {
log.Warn("dont hit walk bloomfilter but hit fetch bloomfilter,also ignore,", string(url))
runtimeConfig.Storage.AddWalkedUrl(url)
continue
}
randomShard := 0
if maxGoRoutine > 1 {
randomShard = rand.Intn(maxGoRoutine - 1)
}
log.Debug("publish:", string(url), ",shard:", randomShard)
runtimeConfig.Storage.AddWalkedUrl(url)
*fetchTaskChannels[randomShard] <- url
} else {
log.Trace("hit walk or fetch bloomfilter,just ignore,", string(url))
}
}
}()
//load predefined fetch jobs
if runtimeConfig.LoadTemplatedFetchJob {
go func() {
if util.CheckFileExists(runtimeConfig.TaskConfig.TaskDataPath + "/urls/template.txt") {
templates := util.ReadAllLines(runtimeConfig.TaskConfig.TaskDataPath + "/urls/template.txt")
ids := util.ReadAllLines(runtimeConfig.TaskConfig.TaskDataPath + "/urls/id.txt")
for _, id := range ids {
for _, template := range templates {
log.Trace("id:", id)
log.Trace("template:", template)
url := strings.Replace(template, "{id}", id, -1)
log.Debug("new task from template:", url)
pendingFetchUrls <- []byte(url)
}
}
log.Info("templated download is done.")
}
}()
}
//fetch urls from saved pages
if runtimeConfig.LoadPendingFetchJobs {
c3 := make(chan bool, 1)
parseQuitChannels[1] = &c3
offset3 := new(RoutingOffset)
// offset3.Offset = initOffset(runtimeConfig, "fetch_from_saved", 0)
offset3.Shard = 0
parseOffsets[1] = offset3
go task.LoadTaskFromLocalFile(pendingFetchUrls, &runtimeConfig, &c3, offset3)
}
//parse fetch failed jobs,and will ignore the walk-filter
//TODO
if runtimeConfig.LoadRuledFetchJob {
log.Debug("start ruled fetch")
go func() {
if runtimeConfig.RuledFetchConfig.UrlTemplate != "" {
for i := runtimeConfig.RuledFetchConfig.From; i <= runtimeConfig.RuledFetchConfig.To; i += runtimeConfig.RuledFetchConfig.Step {
url := strings.Replace(runtimeConfig.RuledFetchConfig.UrlTemplate, "{id}", strconv.FormatInt(int64(i), 10), -1)
log.Debug("add ruled url:", url)
pendingFetchUrls <- []byte(url)
}
} else {
log.Error("ruled template is empty,ignore")
}
}()
}
<-finalQuitSignal
log.Info("[gopa] is down")
}
//fetch url's content
func fetchUrl(url []byte, timeout time.Duration, runtimeConfig RuntimeConfig, offsets *RoutingOffset) {
t := time.NewTimer(timeout)
defer t.Stop()
resource := string(url)
log.Debug("enter fetchUrl method:", resource)
config := runtimeConfig.TaskConfig
if runtimeConfig.Storage.CheckFetchedUrl(url) {
return
}
path := getSavedPath(runtimeConfig, url)
if runtimeConfig.Storage.CheckSavedFile(path) {
log.Warn("file is already saved,skip fetch.", path)
runtimeConfig.Storage.AddSavedUrl(url)
//re-parse local's previous saved page
if runtimeConfig.ParseUrlsFromPreviousSavedPage {
if !runtimeConfig.Storage.CheckParsedFile([]byte(path)) {
log.Debug("previous saved page send to parse-queue:", path)
runtimeConfig.Storage.LogSavedFile(runtimeConfig.PathConfig.SavedFileLog, resource+"|||"+path)
}
}
return
}
//checking fetchUrlPattern
log.Debug("started check fetchUrlPattern,", config.FetchUrlPattern, ",", resource)
if config.FetchUrlPattern.Match(url) {
log.Debug("match fetch url pattern,", resource)
if len(config.FetchUrlMustNotContain) > 0 {
if util.ContainStr(resource, config.FetchUrlMustNotContain) {
log.Debug("hit FetchUrlMustNotContain,ignore,", resource, " , ", config.FetchUrlMustNotContain)
return
}
}
if len(config.FetchUrlMustContain) > 0 {
if !util.ContainStr(resource, config.FetchUrlMustContain) {
log.Debug("not hit FetchUrlMustContain,ignore,", resource, " , ", config.FetchUrlMustContain)
return
}
}
} else {
log.Debug("does not hit FetchUrlPattern ignoring,", resource)
return
}
log.Debug("start fetch url,", resource)
flg := make(chan bool, 1)
go func() {
body, err := HttpGetWithCookie(resource, config.Cookie)
if err == nil {
if body != nil {
//todo parse urls from this page
log.Debug("started check savingUrlPattern,", config.SavingUrlPattern, ",", string(url))
if config.SavingUrlPattern.Match(url) {
log.Debug("match saving url pattern,", resource)
if len(config.SavingUrlMustNotContain) > 0 {
if util.ContainStr(resource, config.SavingUrlMustNotContain) {
log.Debug("hit SavingUrlMustNotContain,ignore,", resource, " , ", config.SavingUrlMustNotContain)
goto exitPage
}
}
if len(config.SavingUrlMustContain) > 0 {
if !util.ContainStr(resource, config.SavingUrlMustContain) {
log.Debug("not hit SavingUrlMustContain,ignore,", resource, " , ", config.SavingUrlMustContain)
goto exitPage
}
}
_, err := Save(runtimeConfig, path, body)
if err == nil {
log.Info("saved:", path)
//todo saved per shard
runtimeConfig.Storage.LogSavedFile(runtimeConfig.PathConfig.SavedFileLog, resource+"|||"+path)
} else {
log.Info("error while saved:", path, ",", err)
goto exitPage
}
} else {
log.Debug("does not hit SavingUrlPattern ignoring,", resource)
}
}
runtimeConfig.Storage.AddFetchedUrl(url)
exitPage:
log.Debug("exit fetchUrl method:", resource)
} else {
// runtimeConfig.Storage.AddFetchFailedUrl(url)
runtimeConfig.Storage.LogFetchFailedUrl(runtimeConfig.PathConfig.FetchFailedLog, resource)
}
flg <- true
}()
//监听通道，由于设有超时，不可能泄露
select {
case <-t.C:
log.Error("fetching url time out,", resource)
case <-flg:
log.Debug("fetching url normal exit,", resource)
return
}
}