diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..a197654 --- /dev/null +++ b/.gitignore @@ -0,0 +1,120 @@ +### JetBrains template +# Covers JetBrains IDEs: IntelliJ, RubyMine, PhpStorm, AppCode, PyCharm, CLion, Android Studio, WebStorm and Rider +# Reference: https://intellij-support.jetbrains.com/hc/en-us/articles/206544839 + +# User-specific stuff +.idea/**/workspace.xml +.idea/**/tasks.xml +.idea/**/usage.statistics.xml +.idea/**/dictionaries +.idea/**/shelf + +# Generated files +.idea/**/contentModel.xml + +# Sensitive or high-churn files +.idea/**/dataSources/ +.idea/**/dataSources.ids +.idea/**/dataSources.local.xml +.idea/**/sqlDataSources.xml +.idea/**/dynamic.xml +.idea/**/uiDesigner.xml +.idea/**/dbnavigator.xml + +# Gradle +.idea/**/gradle.xml +.idea/**/libraries + +# Gradle and Maven with auto-import +# When using Gradle or Maven with auto-import, you should exclude module files, +# since they will be recreated, and may cause churn. Uncomment if using +# auto-import. +# .idea/artifacts +# .idea/compiler.xml +# .idea/jarRepositories.xml +# .idea/modules.xml +# .idea/*.iml +# .idea/modules +# *.iml +# *.ipr + +# CMake +cmake-build-*/ + +# Mongo Explorer plugin +.idea/**/mongoSettings.xml + +# File-based project format +*.iws + +# IntelliJ +out/ + +# mpeltonen/sbt-idea plugin +.idea_modules/ + +# JIRA plugin +atlassian-ide-plugin.xml + +# Cursive Clojure plugin +.idea/replstate.xml + +# Crashlytics plugin (for Android Studio and IntelliJ) +com_crashlytics_export_strings.xml +crashlytics.properties +crashlytics-build.properties +fabric.properties + +# Editor-based Rest Client +.idea/httpRequests + +# Android studio 3.1+ serialized cache file +.idea/caches/build_file_checksums.ser + +### Go template +# Binaries for programs and plugins +*.exe +*.exe~ +*.dll +*.so +*.dylib + +# Test binary, built with `go test -c` +*.test + +# Output of the go coverage tool, specifically when used with LiteIDE +*.out + +# Dependency directories (remove the comment below to include it) +# vendor/ + +### macOS template +# General +.DS_Store +.AppleDouble +.LSOverride + +# Icon must end with two \r +Icon + +# Thumbnails +._* + +# Files that might appear in the root of a volume +.DocumentRevisions-V100 +.fseventsd +.Spotlight-V100 +.TemporaryItems +.Trashes +.VolumeIcon.icns +.com.apple.timemachine.donotpresent + +# Directories potentially created on remote AFP share +.AppleDB +.AppleDesktop +Network Trash Folder +Temporary Items +.apdisk + +.idea/* + diff --git a/README.md b/README.md index 9ff6bee..a800087 100644 --- a/README.md +++ b/README.md @@ -4,18 +4,21 @@ This is a redis based storage backend for [Colly](https://github.com/gocolly/col [![GoDoc](https://godoc.org/github.com/gocolly/redisstorage?status.svg)](https://godoc.org/github.com/gocolly/redisstorage) -## Install + +## Redis Storage + +### Install ``` go get -u github.com/gocolly/redisstorage ``` -## Usage +### Usage ```go import ( - "github.com/gocolly/colly" + "github.com/gocolly/colly/v2" "github.com/gocolly/redisstorage" ) ``` @@ -31,12 +34,38 @@ storage := &redisstorage.Storage{ Prefix: "job01", } -err := c.SetStorage(storage) -if err != nil { +if err := c.SetStorage(storage); err != nil{ panic(err) } ``` +## RedisBloomFilterStorage + +```go +import ( + "github.com/gocolly/colly/v2" + "github.com/gocolly/redisstorage" +) +``` + + +```go +c := colly.NewCollector() + +storage := &redisstorage.RedisBloomFilterStorage{ + Storage: &Storage{ + Address: "127.0.0.1:6379", + Password: "", + DB: 0, + Prefix: "job01", + } +} + +if err := c.SetStorage(storage); err != { + panic(err) +} + +``` ## Bugs diff --git a/_examples/redis_bloomfilter_storage.go b/_examples/redis_bloomfilter_storage.go new file mode 100644 index 0000000..9f8bd3b --- /dev/null +++ b/_examples/redis_bloomfilter_storage.go @@ -0,0 +1,48 @@ +package main + +import ( + "fmt" + + "github.com/gocolly/colly/v2" + "github.com/gocolly/colly/v2/queue" + "github.com/gocolly/redisstorage" +) + +func main() { + c := colly.NewCollector() + //c.AllowURLRevisit = true + redisbloomfilterstorage := &redisstorage.RedisBloomFilterStorage{ + Storage: &redisstorage.Storage{ + Address: "127.0.0.1:6379", + Password: "", + DB: 0, + Prefix: "bl", + }, + } + if err := redisbloomfilterstorage.Init(); err != nil { + panic(err) + } + + if err := c.SetStorage(redisbloomfilterstorage); err != err { + panic(err) + } + // close redis client + defer redisbloomfilterstorage.Client.Close() + + defer redisbloomfilterstorage.Clear() + + q, err := queue.New(10, redisbloomfilterstorage) + if err != nil { + return + } + + c.OnResponse(func(response *colly.Response) { + fmt.Println(string(response.Body)) + }) + + for i := 0; i < 10<<10; i++ { + q.AddURL(fmt.Sprintf("%s?x=%v", `https://httpbin.org/delay/1`, i)) + } + + q.Run(c) +} diff --git a/_examples/redis_storage.go b/_examples/redis_storage.go new file mode 100644 index 0000000..0f820b4 --- /dev/null +++ b/_examples/redis_storage.go @@ -0,0 +1,41 @@ +package main + +import ( + "fmt" + + "github.com/gocolly/colly/v2" + "github.com/gocolly/colly/v2/queue" + "github.com/gocolly/redisstorage" +) + +func main() { + c := colly.NewCollector() + + storage := &redisstorage.Storage{ + Address: "127.0.0.1:6379", + Password: "", + DB: 0, + Prefix: "job01", + } + + if err := c.SetStorage(storage); err != err { + panic(err) + } + // close redis client + //defer storage.Client.Close() + + q, err := queue.New(10, storage) + if err != nil { + return + } + + c.OnResponse(func(response *colly.Response) { + fmt.Println(string(response.Body)) + }) + + for i := 0; i < 10; i++ { + q.AddURL(fmt.Sprintf("%s?x=%v", `https://httpbin.org/delay/1`, i)) + } + + q.Run(c) +} diff --git a/filter/redisbloomfiler.go b/filter/redisbloomfiler.go new file mode 100644 index 0000000..85d7c49 --- /dev/null +++ b/filter/redisbloomfiler.go @@ -0,0 +1,144 @@ +package filter + +import ( + "errors" + "strconv" + + "github.com/go-redis/redis" + "github.com/spaolacci/murmur3" +) + +const ( + setScript = `for _, offset in ipairs(ARGV) do + redis.call("setbit", KEYS[1], offset, 1) +end` + testScript = `for _, offset in ipairs(ARGV) do + if tonumber(redis.call("getbit", KEYS[1], offset)) == 0 then + return false + end +end +return true` +) + +// bitSetProvider +type bitSetProvider interface { + check([]uint) (bool, error) + set([]uint) error +} + +// BloomFilter A Filter is a bloom filter. +type BloomFilter struct { + bits uint + maps uint + bitSet bitSetProvider +} + +// NewBloomFilter create a bloomFilter, store is the backed redis, key is the key for the bloom filter, +// bits is how many bits will be used, maps is how many hashes for each addition. +// best practices: +// elements - means how many actual elements +// when maps = 14, formula: 0.7*(bits/maps), bits = 20*elements, the error rate is 0.000067 < 1e-4 +// for detailed error rate table, see http://pages.cs.wisc.edu/~cao/papers/summary-cache/node8.html +func NewBloomFilter(store *redis.Client, key string) *BloomFilter { + var bits uint = 2 << 31 + var maps uint = 14 + return &BloomFilter{ + bits: bits, + maps: maps, + bitSet: newRedisBitSet(store, key, bits), + } +} + +// Add adds data into f. +func (f *BloomFilter) Add(data []byte) error { + locations := f.getLocations(data) + return f.bitSet.set(locations) +} + +// Exists checks if data is in f. +func (f *BloomFilter) Exists(data []byte) (bool, error) { + locations := f.getLocations(data) + isSet, err := f.bitSet.check(locations) + if err != nil { + return false, err + } + + return isSet, nil +} + +func (f *BloomFilter) getLocations(data []byte) []uint { + locations := make([]uint, f.maps) + for i := uint(0); i < f.maps; i++ { + hashValue := murmur3.Sum64(append(data, byte(i))) + locations[i] = uint(hashValue % uint64(f.bits)) + } + return locations +} + +type redisBitSet struct { + store *redis.Client + key string + bits uint +} + +func newRedisBitSet(store *redis.Client, key string, bits uint) *redisBitSet { + return &redisBitSet{ + store: store, + key: key, + bits: bits, + } +} + +func (r *redisBitSet) buildOffsetArgs(offsets []uint) ([]string, error) { + var args []string + + for _, offset := range offsets { + if offset >= r.bits { + return nil, errors.New(`redisbloomfiler:Too large offset`) + } + + args = append(args, strconv.FormatUint(uint64(offset), 10)) + } + + return args, nil +} + +func (r *redisBitSet) check(offsets []uint) (bool, error) { + args, err := r.buildOffsetArgs(offsets) + if err != nil { + return false, err + } + + resp, err := r.store.Eval(testScript, []string{r.key}, args).Result() + if err == redis.Nil { + return false, nil + } else if err != nil { + return false, err + } + + exists, ok := resp.(int64) + if !ok { + return false, nil + } + + return exists == 1, nil +} + +func (r *redisBitSet) del() error { + _, err := r.store.Del(r.key).Result() + return err +} + +func (r *redisBitSet) set(offsets []uint) error { + args, err := r.buildOffsetArgs(offsets) + if err != nil { + return err + } + + _, err = r.store.Eval(setScript, []string{r.key}, args).Result() + if err == redis.Nil { + return nil + } + + return err +} diff --git a/go.mod b/go.mod new file mode 100644 index 0000000..7df685e --- /dev/null +++ b/go.mod @@ -0,0 +1,21 @@ +module github.com/gocolly/redisstorage + +go 1.16 + +require ( + github.com/PuerkitoBio/goquery v1.8.0 // indirect + github.com/antchfx/htmlquery v1.2.5 // indirect + github.com/antchfx/xmlquery v1.3.12 // indirect + github.com/go-redis/redis v6.15.9+incompatible + github.com/gocolly/colly v1.2.0 // indirect + github.com/gocolly/colly/v2 v2.1.0 // indirect + github.com/golang/groupcache v0.0.0-20210331224755-41bb18bfe9da // indirect + github.com/jawher/mow.cli v1.2.0 // indirect + github.com/onsi/ginkgo v1.16.5 // indirect + github.com/onsi/gomega v1.22.1 // indirect + github.com/spaolacci/murmur3 v1.1.0 + github.com/temoto/robotstxt v1.1.2 // indirect + golang.org/x/net v0.1.0 // indirect + google.golang.org/appengine v1.6.7 // indirect + google.golang.org/protobuf v1.28.1 // indirect +) diff --git a/go.sum b/go.sum new file mode 100644 index 0000000..a3d4fbd --- /dev/null +++ b/go.sum @@ -0,0 +1,239 @@ +cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw= +github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU= +github.com/PuerkitoBio/goquery v1.5.1/go.mod h1:GsLWisAFVj4WgDibEWF4pvYnkVQBpKBKeU+7zCJoLcc= +github.com/PuerkitoBio/goquery v1.8.0 h1:PJTF7AmFCFKk1N6V6jmKfrNH9tV5pNE6lZMkG0gta/U= +github.com/PuerkitoBio/goquery v1.8.0/go.mod h1:ypIiRMtY7COPGk+I/YbZLbxsxn9g5ejnI2HSMtkjZvI= +github.com/andybalholm/cascadia v1.1.0/go.mod h1:GsXiBklL0woXo1j/WYWtSYYC4ouU9PqHO0sqidkEA4Y= +github.com/andybalholm/cascadia v1.2.0/go.mod h1:YCyR8vOZT9aZ1CHEd8ap0gMVm2aFgxBp0T0eFw1RUQY= +github.com/andybalholm/cascadia v1.3.1 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h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4= +honnef.co/go/tools v0.0.0-20190523083050-ea95bdfd59fc/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4= diff --git a/redisbloomfilterstorage.go b/redisbloomfilterstorage.go new file mode 100644 index 0000000..f437642 --- /dev/null +++ b/redisbloomfilterstorage.go @@ -0,0 +1,68 @@ +package redisstorage + +import ( + "encoding/binary" + "fmt" + + "github.com/go-redis/redis" + "github.com/gocolly/redisstorage/filter" +) + +// RedisBloomFilterStorage implements the redis bloom filter storage for Colly +type RedisBloomFilterStorage struct { + // redisstorage.Storage + *Storage + // RedisBloomFilter implements Bloom filter based on redis + RedisBloomFilter *filter.BloomFilter +} + +// Init initializes the redis bloom filter storage +func (s *RedisBloomFilterStorage) Init() error { + if s.Client == nil { + s.Client = redis.NewClient(&redis.Options{ + Addr: s.Address, + Password: s.Password, + DB: s.DB, + }) + } + s.RedisBloomFilter = filter.NewBloomFilter(s.Client, s.Prefix+":bloom") + if _, err := s.Client.Ping().Result(); err != nil { + return fmt.Errorf("redis connection error: %s", err.Error()) + } + return nil +} + +// Clear removes all entries from the storage and bloom bits +func (s *RedisBloomFilterStorage) Clear() error { + s.mu.Lock() + defer s.mu.Unlock() + + r := s.Client.Keys(s.getCookieID("*")) + keys, err := r.Result() + if err != nil { + return err + } + r2 := s.Client.Keys(s.Prefix + ":request:*") + keys2, err := r2.Result() + if err != nil { + return err + } + keys = append(keys, keys2...) + keys = append(keys, s.getQueueID()) + keys = append(keys, s.Prefix+"_bloom") + return s.Client.Del(keys...).Err() +} + +// Visited implements colly/storage.Visited(), base on redis bloom filter +func (s *RedisBloomFilterStorage) Visited(requestID uint64) error { + b := make([]byte, 8) + binary.LittleEndian.PutUint64(b, requestID) + return s.RedisBloomFilter.Add(b) +} + +// IsVisited implements colly/storage.IsVisited(), base on redis bloom filter +func (s *RedisBloomFilterStorage) IsVisited(requestID uint64) (bool, error) { + b := make([]byte, 8) + binary.LittleEndian.PutUint64(b, requestID) + return s.RedisBloomFilter.Exists(b) +} diff --git a/redisbloomfilterstorage_test.go b/redisbloomfilterstorage_test.go new file mode 100644 index 0000000..7f0d2bd --- /dev/null +++ b/redisbloomfilterstorage_test.go @@ -0,0 +1,37 @@ +package redisstorage + +import ( + "fmt" + "math/rand" + "testing" +) + +func TestRedisBloomFilterStorage(t *testing.T) { + // mock rquestID to Verify bloomfilter + mock_requestId := rand.Uint64() + fmt.Println(mock_requestId) + s := &RedisBloomFilterStorage{ + Storage: &Storage{Prefix: `test`}, + } + if err := s.Init(); err != nil { + t.Error("failed to initialize client: " + err.Error()) + } + defer s.Clear() + + t.Run(testing.CoverMode(), func(t *testing.T) { + if err := s.Visited(mock_requestId); err != nil { + t.Error("fail set redis: " + err.Error()) + } + }) + + t.Run(testing.CoverMode(), func(t *testing.T) { + if isV, err := s.IsVisited(mock_requestId); err != nil { + t.Error("failed to initialize client: " + err.Error()) + } else { + if !isV { + t.Error("invalid bloom filter ") + return + } + } + }) +}