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https://github.com/schollz/croc.git
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Works!
This commit is contained in:
Zack Scholl
parent
0bcd272f4e
commit
d1eb0de12d
105
test/connect.go
105
test/connect.go
@ -11,9 +11,12 @@ import (
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"sync"
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"time"
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"github.com/gosuri/uiprogress"
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log "github.com/sirupsen/logrus"
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)
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var bars []*uiprogress.Bar
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// runClient spawns threads for parallel uplink/downlink via TCP
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func runClient(connectionType string, codePhrase string) {
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logger := log.WithFields(log.Fields{
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@ -22,6 +25,10 @@ func runClient(connectionType string, codePhrase string) {
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})
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var wg sync.WaitGroup
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wg.Add(numberConnections)
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uiprogress.Start()
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bars = make([]*uiprogress.Bar, numberConnections)
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fileNameToReceive := ""
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for id := 0; id < numberConnections; id++ {
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go func(id int) {
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defer wg.Done()
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@ -33,66 +40,108 @@ func runClient(connectionType string, codePhrase string) {
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defer connection.Close()
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message := receiveMessage(connection)
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logger.Infof("message: %s", message)
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logger.Debugf("relay says: %s", message)
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logger.Debugf("telling relay: %s", connectionType+"."+codePhrase)
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sendMessage(connectionType+"."+codePhrase, connection)
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if connectionType == "s" { // this is a sender
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logger.Info("waiting for ok from relay")
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logger.Debug("waiting for ok from relay")
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message = receiveMessage(connection)
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logger.Info("got ok from relay")
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logger.Debug("got ok from relay")
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// wait for pipe to be made
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time.Sleep(1 * time.Second)
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time.Sleep(100 * time.Millisecond)
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// Write data from file
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sendFileToClient(id, connection)
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// TODO: Release from connection pool
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// POST /release
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logger.Debug("send file")
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sendFile(id, connection)
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} else { // this is a receiver
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// receive file
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receiveFile(id, connection)
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// TODO: Release from connection pool
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// POST /release
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logger.Debug("receive file")
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fileNameToReceive = receiveFile(id, connection)
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}
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}(id)
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}
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wg.Wait()
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if connectionType == "r" {
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catFile(fileNameToReceive)
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}
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}
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func receiveFile(id int, connection net.Conn) {
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func catFile(fileNameToReceive string) {
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// cat the file
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os.Remove(fileNameToReceive)
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finished, err := os.Create(fileNameToReceive)
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defer finished.Close()
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if err != nil {
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log.Fatal(err)
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}
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for id := 0; id < numberConnections; id++ {
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fh, err := os.Open(fileNameToReceive + "." + strconv.Itoa(id))
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if err != nil {
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log.Fatal(err)
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}
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_, err = io.Copy(finished, fh)
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if err != nil {
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log.Fatal(err)
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}
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fh.Close()
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os.Remove(fileNameToReceive + "." + strconv.Itoa(id))
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}
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fmt.Println("\n\n\nDownloaded " + fileNameToReceive + "!")
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}
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func receiveFile(id int, connection net.Conn) string {
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logger := log.WithFields(log.Fields{
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"function": "receiveFile #" + strconv.Itoa(id),
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})
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bufferFileName := make([]byte, 64)
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bufferFileSize := make([]byte, 10)
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logger.Debug("waiting for file size")
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connection.Read(bufferFileSize)
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fileSize, _ := strconv.ParseInt(strings.Trim(string(bufferFileSize), ":"), 10, 64)
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logger.Debugf("filesize: %d", fileSize)
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connection.Read(bufferFileName)
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fileName = strings.Trim(string(bufferFileName), ":")
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os.Remove(fileName + "." + strconv.Itoa(id))
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newFile, err := os.Create(fileName + "." + strconv.Itoa(id))
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fileNameToReceive := strings.Trim(string(bufferFileName), ":")
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logger.Debugf("fileName: %v", fileNameToReceive)
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os.Remove(fileNameToReceive + "." + strconv.Itoa(id))
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newFile, err := os.Create(fileNameToReceive + "." + strconv.Itoa(id))
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if err != nil {
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panic(err)
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}
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defer newFile.Close()
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bars[id] = uiprogress.AddBar(int(fileSize)/1024 + 1).AppendCompleted().PrependElapsed()
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logger.Debug("waiting for file")
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var receivedBytes int64
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for {
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bars[id].Incr()
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if (fileSize - receivedBytes) < BUFFERSIZE {
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logger.Debug("at the end")
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io.CopyN(newFile, connection, (fileSize - receivedBytes))
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// Empty the remaining bytes that we don't need from the network buffer
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connection.Read(make([]byte, (receivedBytes+BUFFERSIZE)-fileSize))
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if (receivedBytes+BUFFERSIZE)-fileSize < BUFFERSIZE {
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logger.Debug("empty remaining bytes from network buffer")
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connection.Read(make([]byte, (receivedBytes+BUFFERSIZE)-fileSize))
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}
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break
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}
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io.CopyN(newFile, connection, BUFFERSIZE)
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//Increment the counter
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receivedBytes += BUFFERSIZE
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}
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logger.Debug("received file")
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return fileNameToReceive
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}
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func sendFileToClient(id int, connection net.Conn) {
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func sendFile(id int, connection net.Conn) {
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logger := log.WithFields(log.Fields{
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"function": "sendFileToClient #" + strconv.Itoa(id),
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"function": "sendFile #" + strconv.Itoa(id),
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})
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defer connection.Close()
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//Open the file that needs to be send to the client
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@ -118,18 +167,18 @@ func sendFileToClient(id int, connection net.Conn) {
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}
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fileSize := fillString(strconv.FormatInt(int64(bytesPerConnection), 10), 10)
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fileName := fillString(fileInfo.Name(), 64)
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fileNameToSend := fillString(fileInfo.Name(), 64)
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if id == 0 || id == numberConnections-1 {
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logger.Infof("numChunks: %v", numChunks)
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logger.Infof("chunksPerWorker: %v", chunksPerWorker)
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logger.Infof("bytesPerConnection: %v", bytesPerConnection)
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logger.Infof("fileName: %v", fileInfo.Name())
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logger.Debugf("numChunks: %v", numChunks)
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logger.Debugf("chunksPerWorker: %v", chunksPerWorker)
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logger.Debugf("bytesPerConnection: %v", bytesPerConnection)
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logger.Debugf("fileNameToSend: %v", fileInfo.Name())
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}
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logger.Info("sending")
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logger.Debugf("sending %s", fileSize)
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connection.Write([]byte(fileSize))
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connection.Write([]byte(fileName))
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connection.Write([]byte(fileNameToSend))
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sendBuffer := make([]byte, BUFFERSIZE)
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chunkI := 0
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@ -137,7 +186,7 @@ func sendFileToClient(id int, connection net.Conn) {
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_, err = file.Read(sendBuffer)
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if err == io.EOF {
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//End of file reached, break out of for loop
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logger.Info("EOF")
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logger.Debug("EOF")
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break
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}
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if (chunkI >= chunksPerWorker*id && chunkI < chunksPerWorker*id+chunksPerWorker) || (id == numberConnections-1 && chunkI >= chunksPerWorker*id) {
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@ -145,6 +194,6 @@ func sendFileToClient(id int, connection net.Conn) {
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}
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chunkI++
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}
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fmt.Println("File has been sent, closing connection!")
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logger.Debug("file is sent")
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return
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}
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35
test/main.go
35
test/main.go
@ -3,22 +3,24 @@ package main
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import (
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"flag"
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"fmt"
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"os"
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log "github.com/sirupsen/logrus"
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)
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const BUFFERSIZE = 1024
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const numberConnections = 1
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const numberConnections = 4
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// Build flags
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var server, file string
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// Global varaibles
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var serverAddress, fileName, codePhraseFlag, connectionTypeFlag string
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var runAsRelay bool
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var runAsRelay, debugFlag bool
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func main() {
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flag.BoolVar(&runAsRelay, "relay", false, "run as relay")
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flag.BoolVar(&debugFlag, "debug", false, "debug mode")
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flag.StringVar(&serverAddress, "server", "", "(run as client) server address to connect to")
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flag.StringVar(&fileName, "file", "", "(run as server) file to serve")
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flag.StringVar(&codePhraseFlag, "code", "", "(run as server) file to serve")
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@ -31,6 +33,22 @@ func main() {
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if file != "" {
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fileName = file
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}
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if len(fileName) > 0 {
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_, err := os.Open(fileName)
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if err != nil {
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log.Fatal(err)
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return
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}
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}
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log.SetFormatter(&log.TextFormatter{})
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if debugFlag {
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log.SetLevel(log.DebugLevel)
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} else {
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log.SetLevel(log.WarnLevel)
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}
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if runAsRelay {
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runServer()
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} else if len(serverAddress) != 0 {
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@ -39,16 +57,3 @@ func main() {
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fmt.Println("You must specify either -file (for running as a server) or -server (for running as a client)")
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}
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}
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func init() {
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// Log as JSON instead of the default ASCII formatter.
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// log.SetFormatter(&log.JSONFormatter{})
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log.SetFormatter(&log.TextFormatter{})
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// Output to stdout instead of the default stderr
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// Can be any io.Writer, see below for File example
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// log.SetOutput(os.Stdout)
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// Only log the warning severity or above.
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log.SetLevel(log.DebugLevel)
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}
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@ -1,7 +1,6 @@
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package main
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import (
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"fmt"
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"net"
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"strconv"
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"strings"
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@ -31,7 +30,7 @@ func runServer() {
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logger := log.WithFields(log.Fields{
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"function": "main",
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})
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logger.Info("Initializing")
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logger.Debug("Initializing")
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var wg sync.WaitGroup
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wg.Add(numberConnections)
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for id := 0; id < numberConnections; id++ {
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@ -62,62 +61,60 @@ func listener(id int) (err error) {
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return errors.Wrap(err, "Error listening on "+serverAddress+":"+port)
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}
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defer server.Close()
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logger.Info("waiting for connections")
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logger.Debug("waiting for connections")
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//Spawn a new goroutine whenever a client connects
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for {
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connection, err := server.Accept()
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if err != nil {
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return errors.Wrap(err, "problem accepting connection")
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}
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logger.Infof("Client %s connected", connection.RemoteAddr().String())
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logger.Debugf("Client %s connected", connection.RemoteAddr().String())
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go clientCommuncation(id, connection)
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}
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}
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func clientCommuncation(id int, connection net.Conn) {
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logger := log.WithFields(log.Fields{
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"id": id,
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"connection": connection.RemoteAddr().String(),
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})
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logger.Info("Asking who?")
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sendMessage("who?", connection)
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message := receiveMessage(connection)
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connectionType := strings.Split(message, ".")[0]
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codePhrase := strings.Split(message, ".")[1]
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codePhrase := strings.Split(message, ".")[1] + "-" + strconv.Itoa(id)
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logger := log.WithFields(log.Fields{
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"id": id,
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"codePhrase": codePhrase,
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})
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if connectionType == "s" {
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logger.Info("got sender")
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logger.Debug("got sender")
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connections.Lock()
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connections.sender[codePhrase] = connection
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connections.Unlock()
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for {
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logger.Info("waiting for reciever")
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connections.RLock()
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if _, ok := connections.reciever[codePhrase]; ok {
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logger.Info("got reciever")
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logger.Debug("got reciever")
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connections.RUnlock()
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break
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}
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connections.RUnlock()
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time.Sleep(100 * time.Millisecond)
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}
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logger.Info("telling sender ok")
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logger.Debug("telling sender ok")
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sendMessage("ok", connection)
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logger.Info("preparing pipe")
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logger.Debug("preparing pipe")
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connections.Lock()
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con1 := connections.sender[codePhrase]
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con2 := connections.reciever[codePhrase]
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connections.Unlock()
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fmt.Println("piping connections")
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logger.Debug("piping connections")
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Pipe(con1, con2)
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fmt.Println("done piping")
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logger.Debug("done piping")
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connections.Lock()
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delete(connections.sender, codePhrase)
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delete(connections.reciever, codePhrase)
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connections.Unlock()
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fmt.Println("deleted " + codePhrase)
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logger.Debug("deleted sender and receiver")
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} else {
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fmt.Println("Got reciever")
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logger.Debug("got reciever")
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connections.Lock()
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connections.reciever[codePhrase] = connection
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connections.Unlock()
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@ -132,8 +129,7 @@ func sendMessage(message string, connection net.Conn) {
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func receiveMessage(connection net.Conn) string {
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messageByte := make([]byte, BUFFERSIZE)
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n, err := connection.Read(messageByte)
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fmt.Println(n, err)
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connection.Read(messageByte)
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return strings.Replace(string(messageByte), ":", "", -1)
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}
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