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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,147 @@ | ||
| package main | ||
|
|
||
| import ( | ||
| "encoding/json" | ||
| "errors" | ||
| "log" | ||
| "net/http" | ||
| "net/url" | ||
| "path" | ||
| "regexp" | ||
| "strings" | ||
| "time" | ||
|
|
||
| "github.com/andreimarcu/linx-server/backends" | ||
| "github.com/flosch/pongo2" | ||
| "github.com/zenazn/goji/web" | ||
| ) | ||
|
|
||
| type accessKeySource int | ||
|
|
||
| const ( | ||
| accessKeySourceNone accessKeySource = iota | ||
| accessKeySourceCookie | ||
| accessKeySourceHeader | ||
| accessKeySourceForm | ||
| accessKeySourceQuery | ||
| ) | ||
|
|
||
| const accessKeyHeaderName = "Linx-Access-Key" | ||
| const accessKeyParamName = "access_key" | ||
|
|
||
| var ( | ||
| errInvalidAccessKey = errors.New("invalid access key") | ||
|
|
||
| cliUserAgentRe = regexp.MustCompile("(?i)(lib)?curl|wget") | ||
| ) | ||
|
|
||
| func checkAccessKey(r *http.Request, metadata *backends.Metadata) (accessKeySource, error) { | ||
| key := metadata.AccessKey | ||
| if key == "" { | ||
| return accessKeySourceNone, nil | ||
| } | ||
|
|
||
| cookieKey, err := r.Cookie(accessKeyHeaderName) | ||
| if err == nil { | ||
| if cookieKey.Value == key { | ||
| return accessKeySourceCookie, nil | ||
| } | ||
| return accessKeySourceCookie, errInvalidAccessKey | ||
| } | ||
|
|
||
| headerKey := r.Header.Get(accessKeyHeaderName) | ||
| if headerKey == key { | ||
| return accessKeySourceHeader, nil | ||
| } else if headerKey != "" { | ||
| return accessKeySourceHeader, errInvalidAccessKey | ||
| } | ||
|
|
||
| formKey := r.PostFormValue(accessKeyParamName) | ||
| if formKey == key { | ||
| return accessKeySourceForm, nil | ||
| } else if formKey != "" { | ||
| return accessKeySourceForm, errInvalidAccessKey | ||
| } | ||
|
|
||
| queryKey := r.URL.Query().Get(accessKeyParamName) | ||
| if queryKey == key { | ||
| return accessKeySourceQuery, nil | ||
| } else if formKey != "" { | ||
| return accessKeySourceQuery, errInvalidAccessKey | ||
| } | ||
|
|
||
| return accessKeySourceNone, errInvalidAccessKey | ||
| } | ||
|
|
||
| func setAccessKeyCookies(w http.ResponseWriter, siteURL, fileName, value string, expires time.Time) { | ||
| u, err := url.Parse(siteURL) | ||
| if err != nil { | ||
| log.Printf("cant parse siteURL (%v): %v", siteURL, err) | ||
| return | ||
| } | ||
|
|
||
| cookie := http.Cookie{ | ||
| Name: accessKeyHeaderName, | ||
| Value: value, | ||
| HttpOnly: true, | ||
| Domain: u.Hostname(), | ||
| Expires: expires, | ||
| } | ||
|
|
||
| cookie.Path = path.Join(u.Path, fileName) | ||
| http.SetCookie(w, &cookie) | ||
|
|
||
| cookie.Path = path.Join(u.Path, Config.selifPath, fileName) | ||
| http.SetCookie(w, &cookie) | ||
| } | ||
|
|
||
| func fileAccessHandler(c web.C, w http.ResponseWriter, r *http.Request) { | ||
| if !Config.noDirectAgents && cliUserAgentRe.MatchString(r.Header.Get("User-Agent")) && !strings.EqualFold("application/json", r.Header.Get("Accept")) { | ||
| fileServeHandler(c, w, r) | ||
| return | ||
| } | ||
|
|
||
| fileName := c.URLParams["name"] | ||
|
|
||
| metadata, err := checkFile(fileName) | ||
| if err == backends.NotFoundErr { | ||
| notFoundHandler(c, w, r) | ||
| return | ||
| } else if err != nil { | ||
| oopsHandler(c, w, r, RespAUTO, "Corrupt metadata.") | ||
| return | ||
| } | ||
|
|
||
| if src, err := checkAccessKey(r, &metadata); err != nil { | ||
| // remove invalid cookie | ||
| if src == accessKeySourceCookie { | ||
| setAccessKeyCookies(w, getSiteURL(r), fileName, "", time.Unix(0, 0)) | ||
| } | ||
|
|
||
| if strings.EqualFold("application/json", r.Header.Get("Accept")) { | ||
| dec := json.NewEncoder(w) | ||
| _ = dec.Encode(map[string]string{ | ||
| "error": errInvalidAccessKey.Error(), | ||
| }) | ||
|
|
||
| return | ||
| } | ||
|
|
||
| _ = renderTemplate(Templates["access.html"], pongo2.Context{ | ||
| "filename": fileName, | ||
| "accesspath": fileName, | ||
| }, r, w) | ||
|
|
||
| return | ||
| } | ||
|
|
||
| if metadata.AccessKey != "" { | ||
| var expiry time.Time | ||
| if Config.accessKeyCookieExpiry != 0 { | ||
| expiry = time.Now().Add(time.Duration(Config.accessKeyCookieExpiry) * time.Second) | ||
| } | ||
| setAccessKeyCookies(w, getSiteURL(r), fileName, metadata.AccessKey, expiry) | ||
| } | ||
|
|
||
| fileDisplayHandler(c, w, r, fileName, metadata) | ||
| } |
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