95 lines
2.6 KiB
Go
95 lines
2.6 KiB
Go
package main
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import (
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"regexp"
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"strings"
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"log"
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)
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const (
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FileRemapSeparatorStr = " -> "
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)
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type FileRemap struct {
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Regex *regexp.Regexp
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Template string
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}
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/* Pre-compile gophermap file string regex */
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func compileGophermapCheckRegex() *regexp.Regexp {
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return regexp.MustCompile(`^(|.+/|.+\.)gophermap$`)
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}
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/* Pre-compile cgi-bin path string regex */
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func compileCgiBinCheckRegex() *regexp.Regexp {
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return regexp.MustCompile(`^cgi-bin(|/.*)$`)
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}
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/* Compile a user supplied new line separated list of regex statements */
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func compileUserRestrictedRegex(restrictions string) []*regexp.Regexp {
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/* Return slice */
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restrictedRegex := make([]*regexp.Regexp, 0)
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/* Split the user supplied regex statements by new line */
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for _, expr := range strings.Split(restrictions, "\n") {
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/* Empty expression, skip */
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if len(expr) == 0 {
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continue
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}
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/* Try compile regex */
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regex, err := regexp.Compile(expr)
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if err != nil {
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log.Fatalf("Failed compiling user supplied regex: %s\n", expr)
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}
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/* Append restricted */
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restrictedRegex = append(restrictedRegex, regex)
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Config.SysLog.Info("", "Compiled restricted: %s\n", expr)
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}
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return restrictedRegex
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}
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/* Compile a user supplied new line separated list of file remap regex statements */
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func compileUserRemapRegex(remaps string) []*FileRemap {
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/* Return slice */
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fileRemaps := make([]*FileRemap, 0)
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/* Split the user supplied regex statements by new line */
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for _, expr := range strings.Split(remaps, "\n") {
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/* Empty expression, skip */
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if len(expr) == 0 {
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continue
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}
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/* Split into alias and remap string (MUST BE LENGTH 2) */
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split := strings.Split(expr, FileRemapSeparatorStr)
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if len(split) != 2 {
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continue
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}
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/* Try compile regex */
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regex, err := regexp.Compile("(?m)"+strings.TrimPrefix(split[0], "/")+"$")
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if err != nil {
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log.Fatalf("Failed compiling user supplied regex: %s\n", expr)
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}
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/* Append file remapper */
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fileRemaps = append(fileRemaps, &FileRemap{ regex, strings.TrimPrefix(split[1], "/") })
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Config.SysLog.Info("", "Compiled remap: %s\n", expr)
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}
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return fileRemaps
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}
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/* Check if file path is gophermap */
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func isGophermap(path string) bool {
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return Config.RgxGophermap.MatchString(path)
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}
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/* Check if file path within cgi-bin */
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func withinCgiBin(path string) bool {
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return Config.RgxCgiBin.MatchString(path)
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}
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