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