add other session providers (#5963)

vendor/github.com/couchbaselabs/go-couchbase/util.go

@@ -0,0 +1,49 @@
+package couchbase
+
+import (
+	"fmt"
+	"net/url"
+	"strings"
+)
+
+// CleanupHost returns the hostname with the given suffix removed.
+func CleanupHost(h, commonSuffix string) string {
+	if strings.HasSuffix(h, commonSuffix) {
+		return h[:len(h)-len(commonSuffix)]
+	}
+	return h
+}
+
+// FindCommonSuffix returns the longest common suffix from the given
+// strings.
+func FindCommonSuffix(input []string) string {
+	rv := ""
+	if len(input) < 2 {
+		return ""
+	}
+	from := input
+	for i := len(input[0]); i > 0; i-- {
+		common := true
+		suffix := input[0][i:]
+		for _, s := range from {
+			if !strings.HasSuffix(s, suffix) {
+				common = false
+				break
+			}
+		}
+		if common {
+			rv = suffix
+		}
+	}
+	return rv
+}
+
+// ParseURL is a wrapper around url.Parse with some sanity-checking
+func ParseURL(urlStr string) (result *url.URL, err error) {
+	result, err = url.Parse(urlStr)
+	if result != nil && result.Scheme == "" {
+		result = nil
+		err = fmt.Errorf("invalid URL <%s>", urlStr)
+	}
+	return
+}