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frontend: merge regexp from iedon/Birdlg-Go

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Lan Tian 2020-06-01 22:23:57 +08:00
parent 0b5e28851c
commit 877afa24fd
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GPG Key ID: 27F31700E751EC22
1 changed files with 9 additions and 56 deletions
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65
frontend/templateHelper.go
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@ -1,24 +1,12 @@
package main
import (
"net"
"net/http"
"regexp"
"sort"
"strconv"
"strings"
)
// Helper to check if the IP is valid
func isIP(s string) bool {
return nil != net.ParseIP(s)
}
// Helper to check if the number is valid
func isNumber(s string) bool {
_, err := strconv.Atoi(s)
return nil == err
}
func renderTemplate(w http.ResponseWriter, r *http.Request, title string, content string) {
path := r.URL.Path[1:]
split := strings.SplitN(path, "/", 4)
@ -75,51 +63,16 @@ func smartFormatter(s string) string {
var result string
result += "<pre>"
for _, line := range strings.Split(s, "\n") {
var isASes bool = false
var lineFormatted string
words := strings.Split(line, " ")
for wordID, word := range words {
if len(word) == 0 {
continue
}
if wordID > 0 && (len(words[wordID-1]) == 0 || words[wordID-1][len(words[wordID-1])-1] == ':') {
// Insert TAB if there are multiple spaces before this word
lineFormatted += "\t"
} else {
lineFormatted += " "
}
if isIP(word) {
// Add whois link to the IP, handles IPv4 and IPv6
lineFormatted += "<a href=\"/whois/" + word + "\">" + word + "</a>"
} else if len(strings.Split(word, "%")) == 2 && isIP(strings.Split(word, "%")[0]) {
// IPv6 link-local with interface name, like fd00::1%eth0
// Add whois link to address part
lineFormatted += "<a href=\"/whois/" + strings.Split(word, "%")[0] + "\">" + strings.Split(word, "%")[0] + "</a>"
lineFormatted += "%" + strings.Split(word, "%")[1]
} else if len(strings.Split(word, "/")) == 2 && isIP(strings.Split(word, "/")[0]) {
// IP with a CIDR range, like 192.168.0.1/24
// Add whois link to first part
lineFormatted += "<a href=\"/whois/" + strings.Split(word, "/")[0] + "\">" + strings.Split(word, "/")[0] + "</a>"
lineFormatted += "/" + strings.Split(word, "/")[1]
} else if word == "AS:" || word == "\tBGP.as_path:" {
// Bird will output ASNs later
isASes = true
lineFormatted += word
} else if isASes && isNumber(strings.Trim(word, "()")) {
// Remove brackets in path caused by confederation
wordNum := strings.Trim(word, "()")
// Bird is outputing ASNs, add whois for them
lineFormatted += "<a href=\"/whois/AS" + wordNum + "\">" + word + "</a>"
} else {
// Just an ordinary word, print it and done
lineFormatted += word
}
if strings.HasPrefix(strings.TrimSpace(line), "BGP.as_path:") || strings.HasPrefix(strings.TrimSpace(line), "Neighbor AS:") || strings.HasPrefix(strings.TrimSpace(line), "Local AS:") {
lineFormatted = regexp.MustCompile(`(\d+)`).ReplaceAllString(line, `<a href="/whois/${1}" class="whois">${1}</a>`)
} else {
lineFormatted = regexp.MustCompile(`([a-zA-Z0-9\-]*\.([a-zA-Z]{2,3}){1,2})(\s|$)`).ReplaceAllString(line, `<a href="/whois/${1}" class="whois">${1}</a>${3}`)
lineFormatted = regexp.MustCompile(`\[AS(\d+)`).ReplaceAllString(lineFormatted, `[<a href="/whois/${1}" class="whois">AS${1}</a>`)
lineFormatted = regexp.MustCompile(`(\d+\.\d+\.\d+\.\d+)`).ReplaceAllString(lineFormatted, `<a href="/whois/${1}" class="whois">${1}</a>`)
lineFormatted = regexp.MustCompile(`(?i)(([a-f\d]{0,4}:){3,10}[a-f\d]{0,4})`).ReplaceAllString(lineFormatted, `<a href="/whois/${1}" class="whois">${1}</a>`)
}
lineFormatted += "\n"
result += lineFormatted
result += lineFormatted + "\n"
}
result += "</pre>"
return result