Mercurial > gemma
annotate pkg/middleware/modifyquery.go @ 603:3d33c53db1e3
Sounding results: Read point data from xyz files.
author | Sascha L. Teichmann <sascha.teichmann@intevation.de> |
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date | Mon, 10 Sep 2018 12:10:10 +0200 |
parents | 1b08432a0e5d |
children | a244b18cb916 |
rev | line source |
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419
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First attempt for user injection of proxy for using GeoServer with role based security.
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1 package middleware |
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2 |
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3 import ( |
467
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4 "encoding/hex" |
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5 "log" |
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6 "net/http" |
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7 "net/url" |
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8 "strings" |
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9 |
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10 "gemma.intevation.de/gemma/pkg/auth" |
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11 ) |
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12 |
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13 // ParseQuery is a modified version of the internal query |
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14 // parser of the url.parseQuery of the standard library. |
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15 func ParseQuery( |
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16 m url.Values, |
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17 query string, |
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18 keySep, valueSep string, |
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19 unescape func(string) (string, error), |
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20 ) error { |
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21 if unescape == nil { |
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22 unescape = url.QueryUnescape |
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23 } |
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24 for query != "" { |
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25 key := query |
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26 if i := strings.Index(key, keySep); i >= 0 { |
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27 key, query = key[:i], key[i+1:] |
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28 |
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29 } else { |
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30 query = "" |
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31 } |
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32 if key == "" { |
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33 continue |
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34 } |
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35 value := "" |
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36 if i := strings.Index(key, valueSep); i >= 0 { |
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37 key, value = key[:i], key[i+1:] |
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38 } |
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39 key, err := unescape(key) |
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40 if err != nil { |
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41 return err |
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42 } |
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43 value, err = unescape(value) |
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44 if err != nil { |
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45 return err |
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46 } |
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47 m[key] = append(m[key], value) |
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48 } |
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49 return nil |
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50 } |
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51 |
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52 func ModifyQuery(next http.Handler, modify func(*http.Request, url.Values) error) http.Handler { |
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53 |
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54 return http.HandlerFunc(func(rw http.ResponseWriter, req *http.Request) { |
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55 |
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56 // GeoServer query parameters contain ';' as sub key separators. |
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57 // If we would use req.URL.Query() this would be split |
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58 // at the wrong level resulting in broken key/value pairs. |
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59 // So we do the splitting ourselves. |
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60 |
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61 parameters := make(url.Values) |
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62 |
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63 if err := ParseQuery(parameters, req.URL.RawQuery, "&", "=", nil); err != nil { |
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64 log.Printf("parsing query failed: %v\n", err) |
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65 http.Error(rw, http.StatusText(http.StatusBadRequest), http.StatusBadRequest) |
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66 return |
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67 } |
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68 |
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69 if err := modify(req, parameters); err != nil { |
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70 log.Printf("modifying query parameters failed: %v\n", err) |
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71 http.Error(rw, http.StatusText(http.StatusBadRequest), http.StatusBadRequest) |
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72 } |
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73 |
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74 req.URL.RawQuery = parameters.Encode() |
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75 |
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76 next.ServeHTTP(rw, req) |
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77 }) |
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78 } |
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79 |
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80 func InjectUser(req *http.Request, parameters url.Values) error { |
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81 // To prevent SQL injections |
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82 parameters.Del("env") |
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83 |
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84 if session, ok := auth.GetSession(req); ok { |
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85 log.Printf("Injecting user %s\n", session.User) |
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86 parameters.Set("env", "user:"+hex.EncodeToString([]byte(session.User))) |
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87 } |
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88 return nil |
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89 } |