hugo/helpers/general.go

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// Copyright © 2014 Steve Francia <spf@spf13.com>.
//
// Licensed under the Simple Public License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// http://opensource.org/licenses/Simple-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package helpers
import (
"bytes"
"fmt"
"net"
"strings"
)
func StripHTML(s string) string {
output := ""
// Shortcut strings with no tags in them
if !strings.ContainsAny(s, "<>") {
output = s
} else {
s = strings.Replace(s, "\n", " ", -1)
s = strings.Replace(s, "</p>", " \n", -1)
s = strings.Replace(s, "<br>", " \n", -1)
s = strings.Replace(s, "</br>", " \n", -1)
// Walk through the string removing all tags
b := new(bytes.Buffer)
inTag := false
for _, r := range s {
switch r {
case '<':
inTag = true
case '>':
inTag = false
default:
if !inTag {
b.WriteRune(r)
}
}
}
output = b.String()
}
return output
}
func FindAvailablePort() (*net.TCPAddr, error) {
l, err := net.Listen("tcp", ":0")
if err == nil {
defer l.Close()
addr := l.Addr()
if a, ok := addr.(*net.TCPAddr); ok {
return a, nil
}
return nil, fmt.Errorf("Unable to obtain a valid tcp port. %v", addr)
}
return nil, err
}