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package v4
import (
"net/url"
"strings"
)
const doubleSpace = " "
// StripExcessSpaces will rewrite the passed in slice's string values to not
// contain multiple side-by-side spaces.
func StripExcessSpaces(str string) string {
var j, k, l, m, spaces int
// Trim trailing spaces
for j = len(str) - 1; j >= 0 && str[j] == ' '; j-- {
}
// Trim leading spaces
for k = 0; k < j && str[k] == ' '; k++ {
}
str = str[k : j+1]
// Strip multiple spaces.
j = strings.Index(str, doubleSpace)
if j < 0 {
return str
}
buf := []byte(str)
for k, m, l = j, j, len(buf); k < l; k++ {
if buf[k] == ' ' {
if spaces == 0 {
// First space.
buf[m] = buf[k]
m++
}
spaces++
} else {
// End of multiple spaces.
spaces = 0
buf[m] = buf[k]
m++
}
}
return string(buf[:m])
}
// GetURIPath returns the escaped URI component from the provided URL.
func GetURIPath(u *url.URL) string {
var uriPath string
if len(u.Opaque) > 0 {
const schemeSep, pathSep, queryStart = "//", "/", "?"
opaque := u.Opaque
// Cut off the query string if present.
if idx := strings.Index(opaque, queryStart); idx >= 0 {
opaque = opaque[:idx]
}
// Cutout the scheme separator if present.
if strings.Index(opaque, schemeSep) == 0 {
opaque = opaque[len(schemeSep):]
}
// capture URI path starting with first path separator.
if idx := strings.Index(opaque, pathSep); idx >= 0 {
uriPath = opaque[idx:]
}
} else {
uriPath = u.EscapedPath()
}
if len(uriPath) == 0 {
uriPath = "/"
}
return uriPath
}
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