<p>Basically, user provides a list of files to copy from dest1 to dest2. rsync is fired off by pressing the submitting the button, and I want the realtime output of STDOUT/STDERR display in the same page. I would also be saving this execution as a blob in a MySQL DB. WebSockets?</p>
<hr/>**评论：**<br/><br/>AG_Clinton: <pre><p>I did almost exactly that with a python script that ran rsync. I'll show you a very stripped down version of what I have. This is my first time doing something like this and I'm still a beginner, but figured I'd share what worked for me. I used gorilla websockets. I'm sure it could be simplified quite a bit as well.</p>
<pre><code>var (
SyncOutput = make(chan string)
SyncClients = make(map[*websocket.Conn]bool)
SyncClientsLock = sync.RWMutex{}
FileSyncing = false
FileSyncLock = sync.RWMutex{}
)
var upgrader = websocket.Upgrader{
ReadBufferSize: 1024,
WriteBufferSize: 1024,
}
go WatchOutPutChannel()
func runSync() {
cmd := exec.Command("python", "-u", config.SyncFilesScript)
stdout, err := cmd.StdoutPipe()
if err != nil {
fmt.Println(fmt.Sprintf("Error: %s", err))
}
FileSyncLock.Lock()
FileSyncing = true
FileSyncLock.Unlock()
err = cmd.Start()
go WatchOutPut(stdout)
}
func WatchOutPut(out io.Reader) {
scanner := bufio.NewScanner(out)
for scanner.Scan() {
SyncOutput <- scanner.Text()
}
FileSyncLock.Lock()
FileSyncing = false
FileSyncLock.Unlock()
SyncOutput <- "Sync Finished"
}
func WatchOutPutChannel() {
for {
output := <-SyncOutput
SyncClientsLock.RLock()
for client := range SyncClients {
client.WriteMessage(1, []byte(output))
}
SyncClientsLock.RUnlock()
}
}
func wsHandlerSync(w http.ResponseWriter, r *http.Request) {
conn, err := upgrader.Upgrade(w, r, nil)
if err != nil {
fmt.Println("Failed to set websocket upgrade: %+v", err)
return
}
SyncClientsLock.Lock()
SyncClients[conn] = true
SyncClientsLock.Unlock()
for {
_, _, err := conn.ReadMessage()
if err != nil {
break
}
}
SyncClientsLock.Lock()
delete(SyncClients, conn)
SyncClientsLock.Unlock()
conn.Close()
}
</code></pre></pre>dazealex: <pre><p>Thank you kind sir! Much appreciated. </p></pre>toolateforTeddy: <pre><p>Websockets seems like a good plan.</p>
<p>I like gorilla websockets.</p></pre>dazealex: <pre><p>Any examples?</p></pre>
