3 files changed, 45 insertions, 0 deletions

diff --git a/vendor/github.com/hashicorp/go-cleanhttp/cleanhttp.go b/vendor/github.com/hashicorp/go-cleanhttp/cleanhttp.go
index 7d8a57c..8d306bf 100644
--- a/vendor/github.com/hashicorp/go-cleanhttp/cleanhttp.go
+++ b/vendor/github.com/hashicorp/go-cleanhttp/cleanhttp.go
@@ -26,6 +26,7 @@ func DefaultPooledTransport() *http.Transport {
                 DialContext: (&net.Dialer{
                         Timeout:   30 * time.Second,
                         KeepAlive: 30 * time.Second,
+                        DualStack: true,
                 }).DialContext,
                 MaxIdleConns:          100,
                 IdleConnTimeout:       90 * time.Second,
diff --git a/vendor/github.com/hashicorp/go-cleanhttp/go.mod b/vendor/github.com/hashicorp/go-cleanhttp/go.mod
new file mode 100644
index 0000000..310f075
--- /dev/null
+++ b/vendor/github.com/hashicorp/go-cleanhttp/go.mod
@@ -0,0 +1 @@
+module github.com/hashicorp/go-cleanhttp
diff --git a/vendor/github.com/hashicorp/go-cleanhttp/handlers.go b/vendor/github.com/hashicorp/go-cleanhttp/handlers.go
new file mode 100644
index 0000000..7eda377
--- /dev/null
+++ b/vendor/github.com/hashicorp/go-cleanhttp/handlers.go
@@ -0,0 +1,43 @@
+package cleanhttp
+
+import (
+        "net/http"
+        "strings"
+        "unicode"
+)
+
+// HandlerInput provides input options to cleanhttp's handlers
+type HandlerInput struct {
+        ErrStatus int
+}
+
+// PrintablePathCheckHandler is a middleware that ensures the request path
+// contains only printable runes.
+func PrintablePathCheckHandler(next http.Handler, input *HandlerInput) http.Handler {
+        // Nil-check on input to make it optional
+        if input == nil {
+                input = &HandlerInput{
+                        ErrStatus: http.StatusBadRequest,
+                }
+        }
+
+        // Default to http.StatusBadRequest on error
+        if input.ErrStatus == 0 {
+                input.ErrStatus = http.StatusBadRequest
+        }
+
+        return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+                // Check URL path for non-printable characters
+                idx := strings.IndexFunc(r.URL.Path, func(c rune) bool {
+                        return !unicode.IsPrint(c)
+                })
+
+                if idx != -1 {
+                        w.WriteHeader(input.ErrStatus)
+                        return
+                }
+
+                next.ServeHTTP(w, r)
+                return
+        })
+}