Created
May 15, 2013 21:47
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Mysql Query Proxy
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package main | |
import ( | |
"log" | |
"net" | |
"time" | |
) | |
const ( | |
comQuit byte = iota + 1 | |
comInitDB | |
comQuery | |
comFieldList | |
comCreateDB | |
comDropDB | |
comRefresh | |
comShutdown | |
comStatistics | |
comProcessInfo | |
comConnect | |
comProcessKill | |
comDebug | |
comPing | |
comTime | |
comDelayedInsert | |
comChangeUser | |
comBinlogDump | |
comTableDump | |
comConnectOut | |
comRegiserSlave | |
comStmtPrepare | |
comStmtExecute | |
comStmtSendLongData | |
comStmtClose | |
comStmtReset | |
comSetOption | |
comStmtFetch | |
) | |
func main() { | |
ln, err := net.Listen("tcp", ":3316") | |
if err != nil { | |
log.Fatal(err) | |
} | |
for { | |
conn, err := ln.Accept() | |
if err != nil { | |
log.Println(err) | |
continue | |
} | |
go proxify(conn) | |
} | |
} | |
func proxify(conn net.Conn) { | |
server, err := net.Dial("tcp", "localhost:3306") | |
if err != nil { | |
log.Println("Could not dial server") | |
log.Println(err) | |
conn.Close() | |
} | |
go forwardWithLog(conn, server) | |
go forward(server, conn) | |
} | |
func forward(src, sink net.Conn) { | |
buffer := make([]byte, 16777219) | |
src.SetDeadline(time.Time{}) | |
for { | |
n, err := src.Read(buffer) | |
if err != nil { | |
sink.Close() | |
log.Println("Could not read from source") | |
log.Println(err) | |
return | |
} | |
_, err = sink.Write(buffer[0:n]) | |
if err != nil { | |
sink.Close() | |
log.Println("Could not write to sink") | |
log.Println(err) | |
return | |
} | |
} | |
} | |
func forwardWithLog(src, sink net.Conn) { | |
buffer := make([]byte, 16777219) | |
src.SetDeadline(time.Time{}) | |
for { | |
n, err := src.Read(buffer) | |
if err != nil { | |
sink.Close() | |
log.Println("Could not read from source") | |
log.Println(err) | |
return | |
} | |
switch buffer[11] { | |
case comQuery: | |
log.Printf("Query: %s\n", string(buffer[12:n])) | |
case comStmtPrepare: | |
log.Printf("Prepare Query: %s\n", string(buffer[12:n])) | |
} | |
_, err = sink.Write(buffer[0:n]) | |
if err != nil { | |
sink.Close() | |
log.Println("Could not write to sink") | |
log.Println(err) | |
return | |
} | |
} | |
} |
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