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authorWim <wim@42.be>2023-08-05 20:43:19 +0200
committerGitHub <noreply@github.com>2023-08-05 20:43:19 +0200
commit56e7bd01ca09ad52b0c4f48f146a20a4f1b78696 (patch)
treeb1355645342667209263cbd355dc0b4254f1e8fe /vendor/github.com/mattermost/mattermost-server/v5/shared/mlog/tcp.go
parent9459495484d6e06a3d46de64fccd8d06f7ccc72c (diff)
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Update dependencies and remove old matterclient lib (#2067)HEADmaster
Diffstat (limited to 'vendor/github.com/mattermost/mattermost-server/v5/shared/mlog/tcp.go')
-rw-r--r--vendor/github.com/mattermost/mattermost-server/v5/shared/mlog/tcp.go273
1 files changed, 0 insertions, 273 deletions
diff --git a/vendor/github.com/mattermost/mattermost-server/v5/shared/mlog/tcp.go b/vendor/github.com/mattermost/mattermost-server/v5/shared/mlog/tcp.go
deleted file mode 100644
index d65b43ee..00000000
--- a/vendor/github.com/mattermost/mattermost-server/v5/shared/mlog/tcp.go
+++ /dev/null
@@ -1,273 +0,0 @@
-// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
-// See LICENSE.txt for license information.
-
-package mlog
-
-import (
- "context"
- "crypto/tls"
- "errors"
- "fmt"
- "net"
- _ "net/http/pprof"
- "sync"
- "time"
-
- "github.com/hashicorp/go-multierror"
- "github.com/mattermost/logr"
-)
-
-const (
- DialTimeoutSecs = 30
- WriteTimeoutSecs = 30
- RetryBackoffMillis int64 = 100
- MaxRetryBackoffMillis int64 = 30 * 1000 // 30 seconds
-)
-
-// Tcp outputs log records to raw socket server.
-type Tcp struct {
- logr.Basic
-
- params *TcpParams
- addy string
-
- mutex sync.Mutex
- conn net.Conn
- monitor chan struct{}
- shutdown chan struct{}
-}
-
-// TcpParams provides parameters for dialing a socket server.
-type TcpParams struct {
- IP string `json:"IP"`
- Port int `json:"Port"`
- TLS bool `json:"TLS"`
- Cert string `json:"Cert"`
- Insecure bool `json:"Insecure"`
-}
-
-// NewTcpTarget creates a target capable of outputting log records to a raw socket, with or without TLS.
-func NewTcpTarget(filter logr.Filter, formatter logr.Formatter, params *TcpParams, maxQueue int) (*Tcp, error) {
- tcp := &Tcp{
- params: params,
- addy: fmt.Sprintf("%s:%d", params.IP, params.Port),
- monitor: make(chan struct{}),
- shutdown: make(chan struct{}),
- }
- tcp.Basic.Start(tcp, tcp, filter, formatter, maxQueue)
-
- return tcp, nil
-}
-
-// getConn provides a net.Conn. If a connection already exists, it is returned immediately,
-// otherwise this method blocks until a new connection is created, timeout or shutdown.
-func (tcp *Tcp) getConn() (net.Conn, error) {
- tcp.mutex.Lock()
- defer tcp.mutex.Unlock()
-
- Log(LvlTcpLogTarget, "getConn enter", String("addy", tcp.addy))
- defer Log(LvlTcpLogTarget, "getConn exit", String("addy", tcp.addy))
-
- if tcp.conn != nil {
- Log(LvlTcpLogTarget, "reusing existing conn", String("addy", tcp.addy)) // use "With" once Zap is removed
- return tcp.conn, nil
- }
-
- type result struct {
- conn net.Conn
- err error
- }
-
- connChan := make(chan result)
- ctx, cancel := context.WithTimeout(context.Background(), time.Second*DialTimeoutSecs)
- defer cancel()
-
- go func(ctx context.Context, ch chan result) {
- Log(LvlTcpLogTarget, "dailing", String("addy", tcp.addy))
- conn, err := tcp.dial(ctx)
- if err == nil {
- tcp.conn = conn
- tcp.monitor = make(chan struct{})
- go monitor(tcp.conn, tcp.monitor, Log)
- }
- ch <- result{conn: conn, err: err}
- }(ctx, connChan)
-
- select {
- case <-tcp.shutdown:
- return nil, errors.New("shutdown")
- case res := <-connChan:
- return res.conn, res.err
- }
-}
-
-// dial connects to a TCP socket, and optionally performs a TLS handshake.
-// A non-nil context must be provided which can cancel the dial.
-func (tcp *Tcp) dial(ctx context.Context) (net.Conn, error) {
- var dialer net.Dialer
- dialer.Timeout = time.Second * DialTimeoutSecs
- conn, err := dialer.DialContext(ctx, "tcp", fmt.Sprintf("%s:%d", tcp.params.IP, tcp.params.Port))
- if err != nil {
- return nil, err
- }
-
- if !tcp.params.TLS {
- return conn, nil
- }
-
- Log(LvlTcpLogTarget, "TLS handshake", String("addy", tcp.addy))
-
- tlsconfig := &tls.Config{
- ServerName: tcp.params.IP,
- InsecureSkipVerify: tcp.params.Insecure,
- }
- if tcp.params.Cert != "" {
- pool, err := getCertPool(tcp.params.Cert)
- if err != nil {
- return nil, err
- }
- tlsconfig.RootCAs = pool
- }
-
- tlsConn := tls.Client(conn, tlsconfig)
- if err := tlsConn.Handshake(); err != nil {
- return nil, err
- }
- return tlsConn, nil
-}
-
-func (tcp *Tcp) close() error {
- tcp.mutex.Lock()
- defer tcp.mutex.Unlock()
-
- var err error
- if tcp.conn != nil {
- Log(LvlTcpLogTarget, "closing connection", String("addy", tcp.addy))
- close(tcp.monitor)
- err = tcp.conn.Close()
- tcp.conn = nil
- }
- return err
-}
-
-// Shutdown stops processing log records after making best effort to flush queue.
-func (tcp *Tcp) Shutdown(ctx context.Context) error {
- errs := &multierror.Error{}
-
- Log(LvlTcpLogTarget, "shutting down", String("addy", tcp.addy))
-
- if err := tcp.Basic.Shutdown(ctx); err != nil {
- errs = multierror.Append(errs, err)
- }
-
- if err := tcp.close(); err != nil {
- errs = multierror.Append(errs, err)
- }
-
- close(tcp.shutdown)
- return errs.ErrorOrNil()
-}
-
-// Write converts the log record to bytes, via the Formatter, and outputs to the socket.
-// Called by dedicated target goroutine and will block until success or shutdown.
-func (tcp *Tcp) Write(rec *logr.LogRec) error {
- _, stacktrace := tcp.IsLevelEnabled(rec.Level())
-
- buf := rec.Logger().Logr().BorrowBuffer()
- defer rec.Logger().Logr().ReleaseBuffer(buf)
-
- buf, err := tcp.Formatter().Format(rec, stacktrace, buf)
- if err != nil {
- return err
- }
-
- try := 1
- backoff := RetryBackoffMillis
- for {
- select {
- case <-tcp.shutdown:
- return err
- default:
- }
-
- conn, err := tcp.getConn()
- if err != nil {
- Log(LvlTcpLogTarget, "failed getting connection", String("addy", tcp.addy), Err(err))
- reporter := rec.Logger().Logr().ReportError
- reporter(fmt.Errorf("log target %s connection error: %w", tcp.String(), err))
- backoff = tcp.sleep(backoff)
- continue
- }
-
- conn.SetWriteDeadline(time.Now().Add(time.Second * WriteTimeoutSecs))
- _, err = buf.WriteTo(conn)
- if err == nil {
- return nil
- }
-
- Log(LvlTcpLogTarget, "write error", String("addy", tcp.addy), Err(err))
- reporter := rec.Logger().Logr().ReportError
- reporter(fmt.Errorf("log target %s write error: %w", tcp.String(), err))
-
- _ = tcp.close()
-
- backoff = tcp.sleep(backoff)
- try++
- Log(LvlTcpLogTarget, "retrying write", String("addy", tcp.addy), Int("try", try))
- }
-}
-
-// monitor continuously tries to read from the connection to detect socket close.
-// This is needed because TCP target uses a write only socket and Linux systems
-// take a long time to detect a loss of connectivity on a socket when only writing;
-// the writes simply fail without an error returned.
-func monitor(conn net.Conn, done <-chan struct{}, logFunc LogFuncCustom) {
- addy := conn.RemoteAddr().String()
- defer logFunc(LvlTcpLogTarget, "monitor exiting", String("addy", addy))
-
- buf := make([]byte, 1)
- for {
- logFunc(LvlTcpLogTarget, "monitor loop", String("addy", addy))
-
- select {
- case <-done:
- return
- case <-time.After(1 * time.Second):
- }
-
- err := conn.SetReadDeadline(time.Now().Add(time.Second * 30))
- if err != nil {
- continue
- }
-
- _, err = conn.Read(buf)
-
- if errt, ok := err.(net.Error); ok && errt.Timeout() {
- // read timeout is expected, keep looping.
- continue
- }
-
- // Any other error closes the connection, forcing a reconnect.
- logFunc(LvlTcpLogTarget, "monitor closing connection", Err(err))
- conn.Close()
- return
- }
-}
-
-// String returns a string representation of this target.
-func (tcp *Tcp) String() string {
- return fmt.Sprintf("TcpTarget[%s:%d]", tcp.params.IP, tcp.params.Port)
-}
-
-func (tcp *Tcp) sleep(backoff int64) int64 {
- select {
- case <-tcp.shutdown:
- case <-time.After(time.Millisecond * time.Duration(backoff)):
- }
-
- nextBackoff := backoff + (backoff >> 1)
- if nextBackoff > MaxRetryBackoffMillis {
- nextBackoff = MaxRetryBackoffMillis
- }
- return nextBackoff
-}