Vendor main dependencies.

vendor/github.com/donovanhide/eventsource/encoder.go

@@ -0,0 +1,58 @@
+package eventsource
+
+import (
+	"compress/gzip"
+	"fmt"
+	"io"
+	"strings"
+)
+
+var (
+	encFields = []struct {
+		prefix string
+		value  func(Event) string
+	}{
+		{"id: ", Event.Id},
+		{"event: ", Event.Event},
+		{"data: ", Event.Data},
+	}
+)
+
+// An Encoder is capable of writing Events to a stream. Optionally
+// Events can be gzip compressed in this process.
+type Encoder struct {
+	w          io.Writer
+	compressed bool
+}
+
+// NewEncoder returns an Encoder for a given io.Writer.
+// When compressed is set to true, a gzip writer will be
+// created.
+func NewEncoder(w io.Writer, compressed bool) *Encoder {
+	if compressed {
+		return &Encoder{w: gzip.NewWriter(w), compressed: true}
+	}
+	return &Encoder{w: w}
+}
+
+// Encode writes an event in the format specified by the
+// server-sent events protocol.
+func (enc *Encoder) Encode(ev Event) error {
+	for _, field := range encFields {
+		prefix, value := field.prefix, field.value(ev)
+		if len(value) == 0 {
+			continue
+		}
+		value = strings.Replace(value, "\n", "\n"+prefix, -1)
+		if _, err := io.WriteString(enc.w, prefix+value+"\n"); err != nil {
+			return fmt.Errorf("eventsource encode: %v", err)
+		}
+	}
+	if _, err := io.WriteString(enc.w, "\n"); err != nil {
+		return fmt.Errorf("eventsource encode: %v", err)
+	}
+	if enc.compressed {
+		return enc.w.(*gzip.Writer).Flush()
+	}
+	return nil
+}