Move http package inside cmd (#5776)

cmd/http/bufconn.go

@@ -0,0 +1,101 @@
+/*
+ * Minio Cloud Storage, (C) 2017 Minio, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package http
+
+import (
+	"bufio"
+	"net"
+	"time"
+)
+
+// BufConn - is a generic stream-oriented network connection supporting buffered reader and read/write timeout.
+type BufConn struct {
+	QuirkConn
+	bufReader              *bufio.Reader // buffered reader wraps reader in net.Conn.
+	readTimeout            time.Duration // sets the read timeout in the connection.
+	writeTimeout           time.Duration // sets the write timeout in the connection.
+	updateBytesReadFunc    func(int)     // function to be called to update bytes read.
+	updateBytesWrittenFunc func(int)     // function to be called to update bytes written.
+}
+
+// Sets read timeout
+func (c *BufConn) setReadTimeout() {
+	if c.readTimeout != 0 && c.canSetReadDeadline() {
+		c.SetReadDeadline(time.Now().UTC().Add(c.readTimeout))
+	}
+}
+
+func (c *BufConn) setWriteTimeout() {
+	if c.writeTimeout != 0 {
+		c.SetWriteDeadline(time.Now().UTC().Add(c.writeTimeout))
+	}
+}
+
+// RemoveTimeout - removes all configured read and write
+// timeouts. Used by callers which control net.Conn behavior
+// themselves.
+func (c *BufConn) RemoveTimeout() {
+	c.readTimeout = 0
+	c.writeTimeout = 0
+	// Unset read/write timeouts, since we use **bufio** it is not
+	// guaranteed that the underlying Peek/Read operation in-fact
+	// indeed performed a Read() operation on the network. With
+	// that in mind we need to unset any timeouts currently set to
+	// avoid any pre-mature timeouts.
+	c.SetDeadline(time.Time{})
+}
+
+// Peek - returns the next n bytes without advancing the reader.  It just wraps bufio.Reader.Peek().
+func (c *BufConn) Peek(n int) ([]byte, error) {
+	c.setReadTimeout()
+	return c.bufReader.Peek(n)
+}
+
+// Read - reads data from the connection using wrapped buffered reader.
+func (c *BufConn) Read(b []byte) (n int, err error) {
+	c.setReadTimeout()
+	n, err = c.bufReader.Read(b)
+	if err == nil && c.updateBytesReadFunc != nil {
+		c.updateBytesReadFunc(n)
+	}
+
+	return n, err
+}
+
+// Write - writes data to the connection.
+func (c *BufConn) Write(b []byte) (n int, err error) {
+	c.setWriteTimeout()
+	n, err = c.Conn.Write(b)
+	if err == nil && c.updateBytesWrittenFunc != nil {
+		c.updateBytesWrittenFunc(n)
+	}
+
+	return n, err
+}
+
+// newBufConn - creates a new connection object wrapping net.Conn.
+func newBufConn(c net.Conn, readTimeout, writeTimeout time.Duration,
+	updateBytesReadFunc, updateBytesWrittenFunc func(int)) *BufConn {
+	return &BufConn{
+		QuirkConn:              QuirkConn{Conn: c},
+		bufReader:              bufio.NewReader(c),
+		readTimeout:            readTimeout,
+		writeTimeout:           writeTimeout,
+		updateBytesReadFunc:    updateBytesReadFunc,
+		updateBytesWrittenFunc: updateBytesWrittenFunc,
+	}
+}