wehub-resource-sync
89 lines
2.7 KiB
Go
89 lines
2.7 KiB
Go
// Copyright 2024 Dolthub, 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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package main
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import (
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"fmt"
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"strings"
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"github.com/jackc/pgx/v5/pgproto3"
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)
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// createPassthrough creates the go routines that will read from and write to the connections.
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func createPassthrough(clientConnBackend *pgproto3.Backend, postgresConnFrontend *pgproto3.Frontend) {
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go func() {
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for {
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clientMessage, err := clientConnBackend.Receive()
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if err != nil {
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errStr := err.Error()
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if errStr != "unexpected EOF" && !strings.HasSuffix(errStr, "use of closed network connection") {
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fmt.Println(err)
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}
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return
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}
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clientMessage = DuplicateMessage(clientMessage).(pgproto3.FrontendMessage)
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if query, ok := clientMessage.(*pgproto3.Query); ok {
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clientMessage, err = RewriteCopyToLocal(query)
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if err != nil {
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panic(err)
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}
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}
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addMessage(clientMessage)
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if _, ok := clientMessage.(*pgproto3.Terminate); ok {
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terminate.Done()
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return
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}
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postgresConnFrontend.Send(clientMessage)
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if err = postgresConnFrontend.Flush(); err != nil {
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errStr := err.Error()
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if errStr != "unexpected EOF" && !strings.HasSuffix(errStr, "use of closed network connection") {
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fmt.Println(err)
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}
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return
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}
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}
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}()
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go func() {
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for {
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postgresMessage, err := postgresConnFrontend.Receive()
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if err != nil {
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errStr := err.Error()
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if errStr != "unexpected EOF" &&
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!strings.HasSuffix(errStr, "use of closed network connection") &&
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!strings.HasSuffix(errStr, "An existing connection was forcibly closed by the remote host.") {
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fmt.Println(err)
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}
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return
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}
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postgresMessage = DuplicateMessage(postgresMessage).(pgproto3.BackendMessage)
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addMessage(postgresMessage)
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if err = setAuthType(clientConnBackend, postgresMessage); err != nil {
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fmt.Println(err)
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return
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}
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clientConnBackend.Send(postgresMessage)
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if err = clientConnBackend.Flush(); err != nil {
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errStr := err.Error()
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if errStr != "unexpected EOF" &&
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!strings.HasSuffix(errStr, "use of closed network connection") &&
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!strings.HasSuffix(errStr, "An existing connection was forcibly closed by the remote host.") {
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fmt.Println(err)
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}
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return
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}
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}
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}()
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}
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