Mercurial > gemma

annotate pkg/controllers/system.go @ 739:b800eb2a0846

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JSON handler: if result is an io.Reader copyit through.
author Sascha L. Teichmann <sascha.teichmann@intevation.de>
date Mon, 24 Sep 2018 12:35:31 +0200
parents 815f5e2ed974
children 0f61bfc21041
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722
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1 package controllers
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2
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3 import (
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4 "database/sql"
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5 "io/ioutil"
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6 "net/http"
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7 "strings"
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8
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9 "github.com/gorilla/mux"
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10 )
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11
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12 func showSystemLog(
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13 _ interface{}, req *http.Request,
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14 _ *sql.Conn,
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15 ) (jr JSONResult, err error) {
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16
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17 serviceName := mux.Vars(req)["service"]
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18 fileName := mux.Vars(req)["file"]
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19
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20 // The following check is currently most likely unnecessary as I wasn't
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21 // able to inject a verbatim '/' via the middleware, but better be on
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22 // the safe site...
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23 if strings.Contains(fileName, "/") {
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24 err = JSONError{http.StatusBadRequest,
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25 "error: no slashes allowed in file name"}
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26 return
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27 }
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28
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29 var path string
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30
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31 switch serviceName {
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32 case "apache2", "postgresql":
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33 path = "/var/log/" + serviceName + "/" + fileName
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34 default:
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35 err = JSONError{http.StatusBadRequest,
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36 "error: invalid service: " + serviceName}
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37 return
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38 }
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39
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40 var txt []byte
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41
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42 if txt, err = ioutil.ReadFile(path); err != nil {
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43 return
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44 }
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45
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46 jr = JSONResult{
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47 Result: struct {
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48 Path string `json:"path"`
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49 Content string `json:"content"`
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50 }{path, string(txt)},
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51 }
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52 return
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53 }