Use chunked transfer encoding in InfluxDB output (#3307)

plugins/outputs/influxdb/client/udp.go

@@ -1,7 +1,6 @@
 package client
 
 import (
-	"bytes"
 	"fmt"
 	"io"
 	"log"
@@ -62,18 +61,8 @@ func (c *udpClient) Query(command string) error {
 	return nil
 }
 
-// Write will send the byte stream to the given UDP client endpoint
-func (c *udpClient) Write(b []byte) (int, error) {
-	return c.WriteStream(bytes.NewReader(b), -1)
-}
-
-// WriteWithParams are ignored by the UDP client, will forward to WriteStream
-func (c *udpClient) WriteWithParams(b []byte, wp WriteParams) (int, error) {
-	return c.WriteStream(bytes.NewReader(b), -1)
-}
-
 // WriteStream will send the provided data through to the client, contentLength is ignored by the UDP client
-func (c *udpClient) WriteStream(r io.Reader, contentLength int) (int, error) {
+func (c *udpClient) WriteStream(r io.Reader) error {
 	var totaln int
 	for {
 		nR, err := r.Read(c.buffer)
@@ -81,14 +70,14 @@ func (c *udpClient) WriteStream(r io.Reader, contentLength int) (int, error) {
 			break
 		}
 		if err != io.EOF && err != nil {
-			return totaln, err
+			return err
 		}
 
 		if c.buffer[nR-1] == uint8('\n') {
 			nW, err := c.conn.Write(c.buffer[0:nR])
 			totaln += nW
 			if err != nil {
-				return totaln, err
+				return err
 			}
 		} else {
 			log.Printf("E! Could not fit point into UDP payload; dropping")
@@ -99,7 +88,7 @@ func (c *udpClient) WriteStream(r io.Reader, contentLength int) (int, error) {
 					break
 				}
 				if err != io.EOF && err != nil {
-					return totaln, err
+					return err
 				}
 				if c.buffer[nR-1] == uint8('\n') {
 					break
@@ -107,13 +96,7 @@ func (c *udpClient) WriteStream(r io.Reader, contentLength int) (int, error) {
 			}
 		}
 	}
-	return totaln, nil
-}
-
-// WriteStreamWithParams will forward the stream to the client backend, contentLength is ignored by the UDP client
-// write params are ignored by the UDP client
-func (c *udpClient) WriteStreamWithParams(r io.Reader, contentLength int, wp WriteParams) (int, error) {
-	return c.WriteStream(r, -1)
+	return nil
 }
 
 // Close will terminate the provided client connection