/
pages_process.go
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/
pages_process.go
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// Copyright 2016-2017
// CoderG the 2016 project
// Insight 0+0 [ 洞悉 0+0 ]
// InDimensions Construct Source [ 忆黛蒙逝·建造源 ] -> idcsource@gmail.com
// Stephen Fire Meditation Qin [ 火志溟 ] -> firemeditation@gmail.com
// The source code is governed by GNU LGPL v3 license
package dspiders
import (
"fmt"
"net/url"
"time"
"github.com/idcsource/insight00-lib/cpool"
"github.com/idcsource/insight00-lib/drule2/operator"
"github.com/idcsource/insight00-lib/pubfunc"
)
// Handle the store for pages when the crawler get the page.
type PagesProcess struct {
sitename string // The site name.
config *cpool.Section // The PagesStore config
crawlQueue *UrlCrawlQueue // The url crawl queue
indexQueue *WordsIndexProcess // The words index queue
drule *operator.Operator // The DRule2 operator
pagedb *dbinfo // The page data information
mediadb *dbinfo // The media data information
arounddb *dbinfo // The around link data information
urlfilter []string // If the url in the url filter, it will not be store
domains []string // Which domain can be store.
entr_cycle_in int64 // entrance url for cyclical's intervals
entr_url []UrlBasic // the entrance urls
closed bool // If close the pages process, it will true
}
func NewPagesProcess(sitename string, config *cpool.Section, crawlQueue *UrlCrawlQueue, indexQueue *WordsIndexProcess, drule *operator.Operator) (p *PagesProcess, err error) {
p = &PagesProcess{
sitename: sitename,
config: config,
crawlQueue: crawlQueue,
indexQueue: indexQueue,
drule: drule,
closed: true,
}
// the url filter
p.urlfilter, err = config.GetEnum("urlfilter")
if err != nil {
p.urlfilter = make([]string, 0)
err = nil
}
// the domains url
p.domains, err = config.GetEnum("domains")
if err != nil {
return
}
// the entrance url for cyclical's intervals
p.entr_cycle_in, err = config.TranInt64("entr_cycle_in")
if err != nil {
return
}
// the entrance urls
var entr_url []string
entr_url, err = config.GetEnum("entr_url")
if err != nil {
return
}
p.entr_url = make([]UrlBasic, len(entr_url))
for i, one := range entr_url {
var theurl *url.URL
theurl, err = url.Parse(one)
if err != nil {
return
}
p.entr_url[i] = UrlBasic{
SiteName: p.sitename,
Domain: theurl.Hostname(),
Url: one,
}
}
// the around link db
p.arounddb = &dbinfo{
drule: drule,
}
p.arounddb.area, err = config.GetConfig("arounddbname")
if err != nil {
return
}
// the page data db
p.pagedb = &dbinfo{
drule: drule,
}
p.pagedb.area, err = config.GetConfig("pagedbname")
if err != nil {
return
}
/*
var pagedbname string
pagedbname, err = config.GetConfig("pagedb")
if err != nil {
return
}
p.pagedb, err = reladb.NewRelaDBWithDRule(pagedbname, drule)
if err != nil {
return
}
*/
// the media data db
p.mediadb = &dbinfo{
drule: drule,
}
p.mediadb.area, err = config.GetConfig("mediadbname")
if err != nil {
return
}
/*
var mediadbname string
mediadbname, err = config.GetConfig("mediadb")
if err != nil {
return
}
p.mediadb, err = reladb.NewRelaDBWithDRule(mediadbname, drule)
if err != nil {
return
}
*/
return
}
func (p *PagesProcess) Start() {
p.closed = false
go p.addEntrUrls()
}
func (p *PagesProcess) Close() {
p.closed = true
}
// Add a page data to store whitch crawler get.
func (p *PagesProcess) AddPage(page *PageData, status NetDataStatus) (err error) {
// check if the data change(the hash change)
if status == NET_DATA_STATUS_PAGE_UPDATE {
// if update
roleexist, errd := p.pagedb.drule.ExistRole(p.pagedb.area, page.Url)
if errd.IsError() != nil {
err = errd.IsError()
return
}
if roleexist == true {
// if exist
tran, errd := p.pagedb.drule.Begin()
if errd.IsError() != nil {
err = errd.IsError()
return
}
// update the UpInterval.
var upInterval int64
errd = tran.ReadData(p.pagedb.area, page.Url, "UpInterval", &upInterval)
if errd.IsError() != nil {
tran.Rollback()
err = errd.IsError()
return
}
if upInterval > UP_INTERVAL_MIN {
upInterval = upInterval - ((upInterval - UP_INTERVAL_MIN) / 2)
page.UpInterval = upInterval
}
errd = tran.StoreRole(p.pagedb.area, page)
if errd.IsError() != nil {
tran.Rollback()
err = errd.IsError()
return
}
tran.Commit()
} else {
// if not exist
page.UpInterval = UP_INTERVAL_DEFAULT
errd := p.pagedb.drule.StoreRole(p.pagedb.area, page)
if errd.IsError() != nil {
err = errd.IsError()
return
}
}
// if the url in urlfilter, just do not be index.
if pubfunc.StringInSlice(p.urlfilter, page.Url) != true {
// if the url not in urlfilter, send the page to words processor.
index_req := &WordsIndexRequest{
Url: page.Url,
Domain: page.Domain,
Type: WORDS_INDEX_TYPE_PAGE,
PageData: page,
}
err = p.indexQueue.Add(index_req)
return
}
} else if status == NET_DATA_STATUS_PAGE_NOT_UPDATE {
// if not update, just update the UpInterval.
roleexist, errd := p.pagedb.drule.ExistRole(p.pagedb.area, page.Url)
if errd.IsError() != nil {
err = errd.IsError()
return
}
// if the role not exist
if roleexist == false {
return
}
tran, errd := p.pagedb.drule.Begin()
if errd.IsError() != nil {
err = errd.IsError()
return
}
var upInterval int64
errd = tran.ReadData(p.pagedb.area, page.Url, "UpInterval", &upInterval)
if errd.IsError() != nil {
tran.Rollback()
err = errd.IsError()
return
}
if upInterval < UP_INTERVAL_MAX {
upInterval = ((UP_INTERVAL_MAX - upInterval) / 2) + upInterval
errd = tran.WriteData(p.pagedb.area, page.Url, "UpInterval", upInterval)
if errd.IsError() != nil {
tran.Rollback()
err = errd.IsError()
return
}
}
tran.Commit()
}
return
}
// Add a media data to store whitch crawler get.
func (p *PagesProcess) AddMedia(media *MediaData) (err error) {
// TODO or not TODO?
return
}
// Add urls to crawl queue whitch clawler get.
func (p *PagesProcess) AddUrls(urls []UrlBasic) (err error) {
for _, oneurl := range urls {
// check the url if is in the domain
if pubfunc.StringInSlice(p.domains, oneurl.Domain) == true {
// check if the url is in the store.
exist, errd := p.pagedb.drule.ExistRole(p.pagedb.area, oneurl.Url)
if errd.IsError() != nil {
err = errd.IsError()
return
}
if exist == false {
// not exist
if pubfunc.StringInSlice(p.urlfilter, oneurl.Url) == true {
oneurl.Filter = true
} else {
oneurl.Filter = false
}
oneurl.Hash = ""
oneurl.Ver = 0
err = p.crawlQueue.Add(oneurl)
if err != nil {
return
}
} else {
// get the store's last version, look the update time.
var UpTime time.Time
var UpInterval int64
var Hash string
var Ver uint64
tran, errd := p.pagedb.drule.Begin()
if errd.IsError() != nil {
err = errd.IsError()
return
}
errd = tran.ReadData(p.pagedb.area, oneurl.Url, "UpTime", &UpTime)
if errd.IsError() != nil {
tran.Rollback()
err = errd.IsError()
return
}
errd = tran.ReadData(p.pagedb.area, oneurl.Url, "UpInterval", &UpInterval)
if errd.IsError() != nil {
tran.Rollback()
err = errd.IsError()
return
}
errd = tran.ReadData(p.pagedb.area, oneurl.Url, "Hash", &Hash)
if errd.IsError() != nil {
tran.Rollback()
err = errd.IsError()
return
}
errd = tran.ReadData(p.pagedb.area, oneurl.Url, "Ver", &Ver)
if errd.IsError() != nil {
tran.Rollback()
err = errd.IsError()
return
}
tran.Commit()
if UpTime.Unix()+UpInterval < time.Now().Unix() {
// if can update
oneurl.Hash = Hash
oneurl.Ver = Ver + 1
err = p.crawlQueue.Add(oneurl)
if err != nil {
return
}
}
}
} else {
// if the url is in the around link
exist, errd := p.arounddb.drule.ExistRole(p.arounddb.area, oneurl.Url)
if errd.IsError() != nil {
err = errd.IsError()
return
}
if exist == true {
continue
}
thearound := &AroundLink{
Url: oneurl.Url,
Text: oneurl.Text,
}
thearound.New(oneurl.Url)
errd = p.arounddb.drule.StoreRole(p.arounddb.area, thearound)
if errd.IsError() != nil {
err = errd.IsError()
return
}
// text index
index_req := &WordsIndexRequest{
Url: oneurl.Url,
Domain: oneurl.Domain,
Type: WORDS_INDEX_TYPE_AROUND,
AroundLink: thearound,
}
err = p.indexQueue.Add(index_req)
if err != nil {
return
}
}
}
return
}
// Add all entrance url for cyclical. use: go p.addEntrUrls()
func (p *PagesProcess) addEntrUrls() {
for {
if p.closed == true {
return
}
err := p.AddUrls(p.entr_url)
if err != nil {
fmt.Println(err)
}
time.Sleep(time.Second * time.Duration(p.entr_cycle_in))
}
}