Add stub for doll-master and doll services, add required vendored libs

vendor/github.com/carlmjohnson/requests/config.go

@@ -0,0 +1,77 @@
+package requests
+
+import (
+	"compress/gzip"
+	"fmt"
+	"io"
+	"mime/multipart"
+	"net/http/httptest"
+)
+
+// Config allows Builder to be extended by setting several options at once.
+// For example, a Config might set a Body and its ContentType.
+type Config = func(rb *Builder)
+
+// GzipConfig writes a gzip stream to its request body using a callback.
+// It also sets the appropriate Content-Encoding header and automatically
+// closes and the stream when the callback returns.
+func GzipConfig(level int, h func(gw *gzip.Writer) error) Config {
+	return func(rb *Builder) {
+		rb.
+			Header("Content-Encoding", "gzip").
+			BodyWriter(func(w io.Writer) error {
+				gw, err := gzip.NewWriterLevel(w, level)
+				if err != nil {
+					return err
+				}
+				if err = h(gw); err != nil {
+					gw.Close()
+					return err
+				}
+				return gw.Close()
+			})
+	}
+}
+
+// TestServerConfig returns a Config
+// which sets the Builder's BaseURL to s.URL
+// and the Builder's Client to s.Client().
+//
+// Deprecated: Use reqtest.Server.
+func TestServerConfig(s *httptest.Server) Config {
+	return func(rb *Builder) {
+		rb.
+			BaseURL(s.URL).
+			Client(s.Client())
+	}
+}
+
+// BodyMultipart returns a Config
+// that uses a multipart.Writer for the request body.
+// If boundary is "", a multipart boundary is chosen at random.
+// The content type of the request is set to multipart/form-data
+// with the correct boundary.
+// The multipart.Writer is automatically closed if the callback succeeds.
+func BodyMultipart(boundary string, h func(multi *multipart.Writer) error) Config {
+	return func(rb *Builder) {
+		if boundary == "" {
+			multi := multipart.NewWriter(nil)
+			boundary = multi.Boundary()
+		}
+		rb.
+			ContentType("multipart/form-data; boundary=" + boundary).
+			BodyWriter(func(w io.Writer) error {
+				multi := multipart.NewWriter(w)
+				if err := multi.SetBoundary(boundary); err != nil {
+					return fmt.Errorf("setting boundary: %w", err)
+				}
+				if err := h(multi); err != nil {
+					return err
+				}
+				if err := multi.Close(); err != nil {
+					return fmt.Errorf("closing multipart writer: %w", err)
+				}
+				return nil
+			})
+	}
+}