add some useful function

1. Router
2. SetSession/GetSession/DelSession
3. RenderString
4. str2html/htmlquote/htmlunquote
5. move the template Function to util.go

template.go

@@ -5,14 +5,11 @@ package beego
 import (
 	"errors"
 	"fmt"
-	"github.com/russross/blackfriday"
 	"html/template"
 	"os"
 	"path"
 	"path/filepath"
-	"regexp"
 	"strings"
-	"time"
 )
 
 var (
@@ -32,110 +29,9 @@ func init() {
 	beegoTplFuncMap["compare"] = Compare
 	beegoTplFuncMap["substr"] = Substr
 	beegoTplFuncMap["html2str"] = Html2str
-}
-
-// MarkDown parses a string in MarkDown format and returns HTML. Used by the template parser as "markdown"
-func MarkDown(raw string) (output template.HTML) {
-	input := []byte(raw)
-	bOutput := blackfriday.MarkdownBasic(input)
-	output = template.HTML(string(bOutput))
-	return
-}
-
-func Substr(s string, start, length int) string {
-	bt := []rune(s)
-	if start < 0 {
-		start = 0
-	}
-	var end int
-	if (start + length) > (len(bt) - 1) {
-		end = len(bt) - 1
-	} else {
-		end = start + length
-	}
-	return string(bt[start:end])
-}
-
-// Html2str() returns escaping text convert from html
-func Html2str(html string) string {
-	src := string(html)
-
-	//将HTML标签全转换成小写
-	re, _ := regexp.Compile("\\<[\\S\\s]+?\\>")
-	src = re.ReplaceAllStringFunc(src, strings.ToLower)
-
-	//去除STYLE
-	re, _ = regexp.Compile("\\<style[\\S\\s]+?\\</style\\>")
-	src = re.ReplaceAllString(src, "")
-
-	//去除SCRIPT
-	re, _ = regexp.Compile("\\<script[\\S\\s]+?\\</script\\>")
-	src = re.ReplaceAllString(src, "")
-
-	//去除所有尖括号内的HTML代码，并换成换行符
-	re, _ = regexp.Compile("\\<[\\S\\s]+?\\>")
-	src = re.ReplaceAllString(src, "\n")
-
-	//去除连续的换行符
-	re, _ = regexp.Compile("\\s{2,}")
-	src = re.ReplaceAllString(src, "\n")
-
-	return strings.TrimSpace(src)
-}
-
-// DateFormat takes a time and a layout string and returns a string with the formatted date. Used by the template parser as "dateformat"
-func DateFormat(t time.Time, layout string) (datestring string) {
-	datestring = t.Format(layout)
-	return
-}
-
-// Date takes a PHP like date func to Go's time fomate
-func Date(t time.Time, format string) (datestring string) {
-	patterns := []string{
-		// year
-		"Y", "2006", // A full numeric representation of a year, 4 digits	Examples: 1999 or 2003
-		"y", "06", //A two digit representation of a year	Examples: 99 or 03
-
-		// month
-		"m", "01", // Numeric representation of a month, with leading zeros	01 through 12
-		"n", "1", // Numeric representation of a month, without leading zeros	1 through 12
-		"M", "Jan", // A short textual representation of a month, three letters	Jan through Dec
-		"F", "January", // A full textual representation of a month, such as January or March	January through December
-
-		// day
-		"d", "02", // Day of the month, 2 digits with leading zeros	01 to 31
-		"j", "2", // Day of the month without leading zeros	1 to 31
-
-		// week
-		"D", "Mon", // A textual representation of a day, three letters	Mon through Sun
-		"l", "Monday", // A full textual representation of the day of the week	Sunday through Saturday
-
-		// time
-		"g", "3", // 12-hour format of an hour without leading zeros	1 through 12
-		"G", "15", // 24-hour format of an hour without leading zeros	0 through 23
-		"h", "03", // 12-hour format of an hour with leading zeros	01 through 12
-		"H", "15", // 24-hour format of an hour with leading zeros	00 through 23
-
-		"a", "pm", // Lowercase Ante meridiem and Post meridiem	am or pm
-		"A", "PM", // Uppercase Ante meridiem and Post meridiem	AM or PM
-
-		"i", "04", // Minutes with leading zeros	00 to 59
-		"s", "05", // Seconds, with leading zeros	00 through 59
-	}
-	replacer := strings.NewReplacer(patterns...)
-	format = replacer.Replace(format)
-	datestring = t.Format(format)
-	return
-}
-
-// Compare is a quick and dirty comparison function. It will convert whatever you give it to strings and see if the two values are equal.
-// Whitespace is trimmed. Used by the template parser as "eq"
-func Compare(a, b interface{}) (equal bool) {
-	equal = false
-	if strings.TrimSpace(fmt.Sprintf("%v", a)) == strings.TrimSpace(fmt.Sprintf("%v", b)) {
-		equal = true
-	}
-	return
+	beegoTplFuncMap["str2html"] = Str2html
+	beegoTplFuncMap["htmlquote"] = Htmlquote
+	beegoTplFuncMap["htmlunquote"] = Htmlunquote
 }
 
 // AddFuncMap let user to register a func in the template