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// Copyright (C) 2019-2021 Algorand, Inc.
// This file is part of go-algorand
//
// go-algorand is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as
// published by the Free Software Foundation, either version 3 of the
// License, or (at your option) any later version.
//
// go-algorand is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with go-algorand. If not, see <https://www.gnu.org/licenses/>.
package main
import (
"flag"
"fmt"
"net/http"
"os"
"os/signal"
"strings"
"syscall"
"time"
"github.com/algorand/go-deadlock"
"github.com/algorand/go-algorand/test/framework/fixtures"
)
var webProxyDestination = flag.String("targetEndpoint", "", "target endpoint")
var webProxyRuntime = flag.Int64("runtime", 60, "how many seconds we need to run")
var webProxyRequestDelay = flag.Int64("requestDelay", 0, "how many milliseconds we're going to delay before forwarding the request")
var webProxyLogFile = flag.String("log", "webProxy.log", "optional name of log file")
func printHelp() {
fmt.Printf("catchpoint catchup web proxy testing utility\n")
fmt.Printf("command line arguments:\n")
flag.PrintDefaults()
}
func main() {
flag.Parse()
if *webProxyDestination == "" {
printHelp()
return
}
var mu deadlock.Mutex
wp, err := fixtures.MakeWebProxy(*webProxyDestination, func(response http.ResponseWriter, request *http.Request, next http.HandlerFunc) {
mu.Lock()
time.Sleep(time.Duration(*webProxyRequestDelay) * time.Millisecond)
mu.Unlock()
// prevent requests for block #2 to go through.
if strings.HasSuffix(request.URL.String(), "/block/2") {
response.WriteHeader(http.StatusBadRequest)
return
}
if *webProxyLogFile != "" {
f, _ := os.OpenFile(*webProxyLogFile, os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0644)
f.Write([]byte(fmt.Sprintf("proxy saw request for %s\n", request.URL.String())))
f.Close()
}
next(response, request)
})
if err != nil {
return
}
defer wp.Close()
fmt.Printf("%s\n", wp.GetListenAddress())
// Handle signals cleanly
c := make(chan os.Signal)
signal.Notify(c, os.Interrupt, syscall.SIGTERM, syscall.SIGINT)
signal.Ignore(syscall.SIGHUP)
select {
case sig := <-c:
fmt.Printf("Exiting webproxy on %v\n", sig)
case <-time.After(time.Duration(*webProxyRuntime) * time.Second):
}
}
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