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