/
helper.go
401 lines (349 loc) · 9.11 KB
/
helper.go
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package reader
import (
"bytes"
"crypto/sha1"
"encoding/base64"
"fmt"
"io"
"net/url"
"path/filepath"
"strings"
"github.com/PuerkitoBio/goquery"
)
//LinksToCards 链接组转换成卡片组
func LinksToCards(links []Link, page, drive string) (cards []Card) {
for _, link := range links { //所有链接
// todo 合成链接
wxto := fmt.Sprintf(`%v?drive=%v&url=%v`, page, drive, EncodeURL(link.URL))
cards = append(cards, Card{link.Title, wxto, ``, `link`, ``, nil, link.URL, ``})
}
return
}
//CleaningRepeat 清洗重复数据
// func CleaningRepeat(links []Link) (newlinks []Link) {
// var tnu = map[string]int{} //检查标题出现次数
// for _, link := range links { //统计标题出现次数
// if link.Title != "" {
// if _, ok := tnu[link.Title]; ok && link.Title != "" {
// tnu[link.Title]++
// } else {
// tnu[link.Title] = 1
// }
// }
// }
// var crp = map[string]int{}
// for _, link := range links {
// if link.Title != "" {
// if _, ok := crp[link.URL]; ok {
// crp[link.URL]++
// if _, ok2 := tnu[link.Title]; ok2 && tnu[link.Title] == 1 { //如果这个标题只出现一次
// }
// } else {
// crp[link.URL] = 1
// newlinks = append(newlinks, link)
// }
// }
// }
// for _, link := range links {
// if link.Title != "" {
// if _, ok := crp[link.URL]; ok && tnu[link.Title] == 1 {
// crp[link.URL]++
// } else {
// crp[link.URL] = 1
// }
// }
// if _, ok := crp[link.URL]; !ok && link.Title != "" {
// crp[link.URL] = 1
// if _, ok := wg[link.URL]; ok && link.Title != "" {
// newlinks = append(newlinks, link)
// }
// }
// }
// return newlinks
// }
// CleaningFrontRepeat 清洗前面的数据(相同标题地址出来两次用后面的)
func CleaningFrontRepeat(links []Link) (newlinks []Link) {
var tnu = map[string]int{} //检查标题出现次数
var key string
for _, link := range links { //统计标题出现次数
if link.Title != "" {
key = link.Title + link.URL
if _, ok := tnu[key]; ok && link.Title != "" {
tnu[key]++
} else {
tnu[key] = 1
}
}
}
for _, link := range links { //统计标题出现次数
if link.Title != "" {
key = link.Title + link.URL
if _, ok := tnu[key]; ok {
tnu[key]--
if tnu[key] == 0 {
newlinks = append(newlinks, link)
}
}
}
}
return newlinks
}
// CleaningFrontLinkRepeat 清洗前面的数据(相同标题地址出来两次用后面的)
func CleaningFrontLinkRepeat(links []Link) (newlinks []Link) {
var tnu = map[string]int{} //检查标题出现次数
var key string
for _, link := range links { //统计标题出现次数
if link.Title != "" {
key = link.URL
if _, ok := tnu[key]; ok && link.Title != "" {
tnu[key]++
} else {
tnu[key] = 1
}
}
}
for _, link := range links { //统计标题出现次数
if link.Title != "" {
key = link.URL
if _, ok := tnu[key]; ok {
tnu[key]--
if tnu[key] == 0 {
newlinks = append(newlinks, link)
}
}
}
}
return newlinks
}
//Cleaning 清洗数据
func Cleaning(links []Link) (newlinks []Link) {
// 拆分链接字符占比重
var edu = map[string]int{}
for _, link := range links { //所有链接
s := GetTag(link.URL)
for _, k := range strings.Split(s, ",") { //链接分拆统计
if v, ok := edu[k]; ok && k != "" && k != " " {
v++
edu[k] = v
} else {
edu[k] = 1
}
}
}
var mw = 0
var maxWeight = 0.0
// log.Fatal(edu)
for _, v := range edu {
if v > 10 {
v = 10
}
mw += v
}
// 找出最大重量
for _, link := range links {
s := GetTag(link.URL)
w := 0
for _, k := range strings.Split(s, ",") {
if v, ok := edu[k]; ok {
w += v
}
}
if (float64(w) / float64(mw)) > maxWeight {
maxWeight = float64(w) / float64(mw)
}
// wg[link.URL] = w
}
var pro = maxWeight * 0.30
// 这个链接的重量
var wg = map[string]int{}
for _, link := range links {
s := GetTag(link.URL)
w := 0
for _, k := range strings.Split(s, ",") {
if v, ok := edu[k]; ok {
w += v
}
}
if float64(w) > (float64(mw) * float64(pro)) {
wg[link.URL] = w
}
// wg[link.URL] = w
}
// log.Fatal(links)
var crp = map[string]int{}
for _, link := range links {
if _, ok := crp[link.URL]; !ok && link.Title != "" {
crp[link.URL] = 1
if _, ok := wg[link.URL]; ok && link.Title != "" {
newlinks = append(newlinks, link)
}
}
}
return newlinks
}
//GetTag 获取特点
func GetTag(urlStr string) string {
var exp = []string{
`?`,
`&`,
`#`,
`/`,
`=`,
// `-`,
`.`,
}
link, _ := url.Parse(urlStr)
// link.Path =
for _, t := range exp {
// u := fmt.Sprintf(`%v`, link.Path)
link.Path = strings.Replace(link.Path, t, ",", -1)
}
// 补丁,替换掉 .htm .html .shtml 静态后缀
link.Path = strings.Replace(link.Path, ".htm", ",htm", -1)
link.Path = strings.Replace(link.Path, ".sht", ",sht", -1)
return fmt.Sprintf(`%v,%v%v`, link.Scheme, link.Host, link.Path)
}
//GetTagMore 获取特点
func GetTagMore(urlStr string) string {
var exp = []string{
`?`,
`&`,
`#`,
`/`,
`=`,
`-`,
`.`,
}
link, _ := url.Parse(urlStr)
// link.Path =
for _, t := range exp {
// u := fmt.Sprintf(`%v`, link.Path)
link.Path = strings.Replace(link.Path, t, ",", -1)
}
// 补丁,替换掉 .htm .html .shtml 静态后缀
link.Path = strings.Replace(link.Path, ".htm", ",htm", -1)
link.Path = strings.Replace(link.Path, ".sht", ",sht", -1)
return fmt.Sprintf(`%v,%v%v`, link.Scheme, link.Host, link.Path)
}
//GetHash 获取字符串hash
func GetHash(s string) string {
h := sha1.New()
io.WriteString(h, s)
return fmt.Sprintf("%x", h.Sum(nil))
}
//GetCatalogHash get 获取目录hash
func GetCatalogHash(list Catalog) string {
var buf bytes.Buffer
buf.WriteString(list.Title)
for _, card := range list.Cards {
buf.WriteString(card.Title)
buf.WriteString(card.WxTo)
}
buf.WriteString(list.SourceURL)
return GetHash(buf.String())
}
//GetListHash get
func GetListHash(list List) string {
var buf bytes.Buffer
buf.WriteString(list.Title)
for _, link := range list.Links {
buf.WriteString(link.Title)
buf.WriteString(link.URL)
}
buf.WriteString(list.SourceURL)
return GetHash(buf.String())
}
//GetLinks 获取链接地址 参考链接
func GetLinks(g *goquery.Document, link *url.URL) (links []Link) {
g.Find("a").Each(func(i int, content *goquery.Selection) {
n := strings.TrimSpace(content.Text())
u, _ := content.Attr("href")
if strings.Index(u, "java") != 0 && n != "" {
if strings.Index(u, "//") == 0 {
u = fmt.Sprintf(`%v:%v`, link.Scheme, u)
// log.Println(`u1`, u)
} else if strings.Index(u, "/") == 0 {
u = fmt.Sprintf(`%v://%v%v`, link.Scheme, link.Host, u)
// log.Println(`u2`, u, link)
} else if strings.Index(u, "?") == 0 {
u = fmt.Sprintf(`%v://%v%v%v`, link.Scheme, link.Host, link.Path, u)
// log.Println(`u2`, u, link)
} else if strings.Index(u, "#") != 0 && strings.Index(u, "http") != 0 {
//todo link.Path 获取目录
p1, _ := filepath.Split(link.Path)
u = fmt.Sprintf(`%v://%v%v%v`, link.Scheme, link.Host, p1, u)
// log.Println(`u3`, u, link)
}
u = strings.Replace(u, " ", "", -1)
u = strings.Replace(u, " ", "", -1)
// 去除换行符
u = strings.Replace(u, "\n", "", -1)
u = strings.Replace(u, "\t", "", -1)
links = append(links, Link{
n,
u,
"",
})
}
})
return links
}
//EncodeURL 把url encode
func EncodeURL(str string) string {
// es := base64.URLEncoding.EncodeToString([]byte(str))
return url.QueryEscape(base64.URLEncoding.EncodeToString([]byte(str)))
// return encodeURIComponent(es)
}
//DecodeURL 把url decode
func DecodeURL(str string) (string, error) {
es, err := url.QueryUnescape(str)
strByte, err := base64.URLEncoding.DecodeString(es)
return string(strByte), err
}
// 可以通过修改底层url.QueryEscape代码获得更高的效率,很简单
func encodeURIComponent(str string) string {
r := url.QueryEscape(str)
r = strings.Replace(r, "+", "%20", -1)
return r
}
//SimilarText 函数来自 http://www.syyong.com/Go/Go-implements-the-string-similarity-calculation-function-Levenshtein-and-SimilarText.html
// similar_text()
func SimilarText(first, second string, percent *float64) int {
var similarText func(string, string, int, int) int
similarText = func(str1, str2 string, len1, len2 int) int {
var sum, max int
pos1, pos2 := 0, 0
// Find the longest segment of the same section in two strings
for i := 0; i < len1; i++ {
for j := 0; j < len2; j++ {
for l := 0; (i+l < len1) && (j+l < len2) && (str1[i+l] == str2[j+l]); l++ {
if l+1 > max {
max = l + 1
pos1 = i
pos2 = j
}
}
}
}
if sum = max; sum > 0 {
if pos1 > 0 && pos2 > 0 {
sum += similarText(str1, str2, pos1, pos2)
}
if (pos1+max < len1) && (pos2+max < len2) {
s1 := []byte(str1)
s2 := []byte(str2)
sum += similarText(string(s1[pos1+max:]), string(s2[pos2+max:]), len1-pos1-max, len2-pos2-max)
}
}
return sum
}
l1, l2 := len(first), len(second)
if l1+l2 == 0 {
return 0
}
sim := similarText(first, second, l1, l2)
if percent != nil {
*percent = float64(sim*200) / float64(l1+l2)
}
return sim
}