111 lines
2.4 KiB
Go
111 lines
2.4 KiB
Go
package main
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import (
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"bytes"
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"crypto/rand"
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"fmt"
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"path/filepath"
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"regexp"
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"strconv"
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"strings"
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)
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var (
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regexpSpaces = regexp.MustCompile(`[\s]+`)
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)
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// inArray checks if a string is present in a list of strings.
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func inArray(val string, vals []string) (ok bool) {
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for _, v := range vals {
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if v == val {
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return true
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}
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}
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return false
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}
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// makeFilename sanitizes a filename (user supplied upload filenames).
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func makeFilename(fName string) string {
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name := strings.TrimSpace(fName)
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if name == "" {
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name, _ = generateRandomString(10)
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}
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// replace whitespace with "-"
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name = regexpSpaces.ReplaceAllString(name, "-")
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return filepath.Base(name)
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}
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// makeMsgTpl takes a page title, heading, and message and returns
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// a msgTpl that can be rendered as an HTML view. This is used for
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// rendering arbitrary HTML views with error and success messages.
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func makeMsgTpl(pageTitle, heading, msg string) msgTpl {
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if heading == "" {
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heading = pageTitle
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}
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err := msgTpl{}
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err.Title = pageTitle
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err.MessageTitle = heading
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err.Message = msg
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return err
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}
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// parseStringIDs takes a slice of numeric string IDs and
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// parses each number into an int64 and returns a slice of the
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// resultant values.
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func parseStringIDs(s []string) ([]int, error) {
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vals := make([]int, 0, len(s))
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for _, v := range s {
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i, err := strconv.Atoi(v)
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if err != nil {
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return nil, err
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}
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if i < 1 {
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return nil, fmt.Errorf("%d is not a valid ID", i)
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}
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vals = append(vals, i)
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}
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return vals, nil
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}
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// generateRandomString generates a cryptographically random, alphanumeric string of length n.
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func generateRandomString(n int) (string, error) {
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const dictionary = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"
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var bytes = make([]byte, n)
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if _, err := rand.Read(bytes); err != nil {
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return "", err
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}
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for k, v := range bytes {
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bytes[k] = dictionary[v%byte(len(dictionary))]
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}
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return string(bytes), nil
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}
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// strHasLen checks if the given string has a length within min-max.
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func strHasLen(str string, min, max int) bool {
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return len(str) >= min && len(str) <= max
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}
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// strSliceContains checks if a string is present in the string slice.
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func strSliceContains(str string, sl []string) bool {
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for _, s := range sl {
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if s == str {
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return true
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}
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}
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return false
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}
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func int8ToStr(bs []int8) string {
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b := make([]byte, len(bs))
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for i, v := range bs {
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b[i] = byte(v)
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}
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return string(bytes.Trim(b, "\x00"))
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}
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