wide/output/run.go

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// Copyright (c) 2014-2019, b3log.org & hacpai.com
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
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// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package output
import (
"bufio"
"encoding/json"
"math/rand"
"net/http"
"os/exec"
"path/filepath"
"strings"
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"github.com/b3log/wide/conf"
"github.com/b3log/wide/session"
"github.com/b3log/wide/util"
)
// RunHandler handles request of executing a binary file.
func RunHandler(w http.ResponseWriter, r *http.Request) {
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result := util.NewResult()
defer util.RetResult(w, r, result)
var args map[string]interface{}
if err := json.NewDecoder(r.Body).Decode(&args); err != nil {
logger.Error(err)
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result.Succ = false
}
sid := args["sid"].(string)
wSession := session.WideSessions.Get(sid)
if nil == wSession {
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result.Succ = false
}
filePath := args["executable"].(string)
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var cmd *exec.Cmd
if conf.Docker {
fileName := filepath.Base(filePath)
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cmd = exec.Command("timeout", "5", "docker", "run", "--rm", "-v", filePath+":/"+fileName, conf.DockerImageGo, "/"+fileName)
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} else {
cmd = exec.Command(filePath)
curDir := filepath.Dir(filePath)
cmd.Dir = curDir
}
stdout, err := cmd.StdoutPipe()
if nil != err {
logger.Error(err)
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result.Succ = false
}
stderr, err := cmd.StderrPipe()
if nil != err {
logger.Error(err)
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result.Succ = false
}
outReader := bufio.NewReader(stdout)
errReader := bufio.NewReader(stderr)
if err := cmd.Start(); nil != err {
logger.Error(err)
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result.Succ = false
}
wsChannel := session.OutputWS[sid]
channelRet := map[string]interface{}{}
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if !result.Succ {
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channelRet["cmd"] = "run-done"
channelRet["output"] = ""
wsChannel.WriteJSON(&channelRet)
wsChannel.Refresh()
return
}
channelRet["pid"] = cmd.Process.Pid
// add the process to user's process set
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Processes.Add(wSession, cmd.Process)
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// push once for front-end to get the 'run' state and pid
if nil != wsChannel {
channelRet["cmd"] = "run"
channelRet["output"] = ""
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if nil != wsChannel {
wsChannel.WriteJSON(&channelRet)
wsChannel.Refresh()
}
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}
go func(runningId int) {
defer util.Recover()
logger.Debugf("User [%s, %s] is running [id=%d, file=%s]", wSession.Username, sid, runningId, filePath)
go func() {
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defer util.Recover()
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for {
r, _, err := outReader.ReadRune()
if nil != err {
break
}
oneRuneStr := string(r)
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oneRuneStr = strings.Replace(oneRuneStr, "<", "&lt;", -1)
oneRuneStr = strings.Replace(oneRuneStr, ">", "&gt;", -1)
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channelRet["cmd"] = "run"
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channelRet["output"] = oneRuneStr
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wsChannel := session.OutputWS[sid]
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if nil != wsChannel {
wsChannel.WriteJSON(&channelRet)
wsChannel.Refresh()
}
}
}()
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for {
r, _, err := errReader.ReadRune()
if nil != err {
break
}
oneRuneStr := string(r)
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oneRuneStr = strings.Replace(oneRuneStr, "<", "&lt;", -1)
oneRuneStr = strings.Replace(oneRuneStr, ">", "&gt;", -1)
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channelRet["cmd"] = "run"
channelRet["output"] = "<span class='stderr'>" + oneRuneStr + "</span>"
wsChannel := session.OutputWS[sid]
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if nil != wsChannel {
wsChannel.WriteJSON(&channelRet)
wsChannel.Refresh()
}
}
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cmd.Wait()
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// remove the exited process from user's process set
Processes.Remove(wSession, cmd.Process)
channelRet["cmd"] = "run-done"
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if 124 == cmd.ProcessState.ExitCode() {
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channelRet["output"] = "<span class='stderr'>run program timeout in 5s</span>\n"
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} else {
channelRet["output"] = "\n<span class='stderr'>run program complete</span>\n"
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}
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if nil != wsChannel {
wsChannel.WriteJSON(&channelRet)
wsChannel.Refresh()
}
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}(rand.Int())
}
// StopHandler handles request of stoping a running process.
func StopHandler(w http.ResponseWriter, r *http.Request) {
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result := util.NewResult()
defer util.RetResult(w, r, result)
var args map[string]interface{}
if err := json.NewDecoder(r.Body).Decode(&args); err != nil {
logger.Error(err)
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result.Succ = false
return
}
sid := args["sid"].(string)
pid := int(args["pid"].(float64))
wSession := session.WideSessions.Get(sid)
if nil == wSession {
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result.Succ = false
return
}
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Processes.Kill(wSession, pid)
}