add vendoring with go dep

vendor/github.com/influxdata/influxdb/influxql/sanitize.go

@@ -0,0 +1,47 @@
+package influxql
+
+import (
+	"bytes"
+	"regexp"
+)
+
+var (
+	sanitizeSetPassword = regexp.MustCompile(`(?i)password\s+for[^=]*=\s+(["']?[^\s"]+["']?)`)
+
+	sanitizeCreatePassword = regexp.MustCompile(`(?i)with\s+password\s+(["']?[^\s"]+["']?)`)
+)
+
+// Sanitize attempts to sanitize passwords out of a raw query.
+// It looks for patterns that may be related to the SET PASSWORD and CREATE USER
+// statements and will redact the password that should be there. It will attempt
+// to redact information from common invalid queries too, but it's not guaranteed
+// to succeed on improper queries.
+//
+// This function works on the raw query and attempts to retain the original input
+// as much as possible.
+func Sanitize(query string) string {
+	if matches := sanitizeSetPassword.FindAllStringSubmatchIndex(query, -1); matches != nil {
+		var buf bytes.Buffer
+		i := 0
+		for _, match := range matches {
+			buf.WriteString(query[i:match[2]])
+			buf.WriteString("[REDACTED]")
+			i = match[3]
+		}
+		buf.WriteString(query[i:])
+		query = buf.String()
+	}
+
+	if matches := sanitizeCreatePassword.FindAllStringSubmatchIndex(query, -1); matches != nil {
+		var buf bytes.Buffer
+		i := 0
+		for _, match := range matches {
+			buf.WriteString(query[i:match[2]])
+			buf.WriteString("[REDACTED]")
+			i = match[3]
+		}
+		buf.WriteString(query[i:])
+		query = buf.String()
+	}
+	return query
+}