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allow limiting access by passwords (fix #194)
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,138 @@ | ||
| package main | ||
|
|
||
| import ( | ||
| "encoding/json" | ||
| "errors" | ||
| "net/http" | ||
| "regexp" | ||
| "strings" | ||
| "time" | ||
|
|
||
| "github.com/andreimarcu/linx-server/backends" | ||
| "github.com/flosch/pongo2" | ||
| "github.com/zenazn/goji/web" | ||
| ) | ||
|
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| type accessKeySource int | ||
|
|
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| const ( | ||
| accessKeySourceNone accessKeySource = iota | ||
| accessKeySourceCookie | ||
| accessKeySourceHeader | ||
| accessKeySourceForm | ||
| accessKeySourceQuery | ||
| ) | ||
|
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| const accessKeyHeaderName = "Linx-Access-Key" | ||
| const accessKeyParamName = "access_key" | ||
|
|
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| var ( | ||
| errInvalidAccessKey = errors.New("invalid access key") | ||
|
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| cliUserAgentRe = regexp.MustCompile("(?i)(lib)?curl|wget") | ||
| ) | ||
|
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| func checkAccessKey(r *http.Request, metadata *backends.Metadata) (accessKeySource, error) { | ||
| key := metadata.AccessKey | ||
| if key == "" { | ||
| return accessKeySourceNone, nil | ||
| } | ||
|
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| cookieKey, err := r.Cookie(accessKeyHeaderName) | ||
| if err == nil { | ||
| if cookieKey.Value == key { | ||
| return accessKeySourceCookie, nil | ||
| } | ||
| return accessKeySourceCookie, errInvalidAccessKey | ||
| } | ||
|
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| headerKey := r.Header.Get(accessKeyHeaderName) | ||
| if headerKey == key { | ||
| return accessKeySourceHeader, nil | ||
| } else if headerKey != "" { | ||
| return accessKeySourceHeader, errInvalidAccessKey | ||
| } | ||
|
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| formKey := r.PostFormValue(accessKeyParamName) | ||
| if formKey == key { | ||
| return accessKeySourceForm, nil | ||
| } else if formKey != "" { | ||
| return accessKeySourceForm, errInvalidAccessKey | ||
| } | ||
|
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| queryKey := r.URL.Query().Get(accessKeyParamName) | ||
| if queryKey == key { | ||
| return accessKeySourceQuery, nil | ||
| } else if formKey != "" { | ||
| return accessKeySourceQuery, errInvalidAccessKey | ||
| } | ||
|
|
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| return accessKeySourceNone, errInvalidAccessKey | ||
| } | ||
|
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| func setAccessKeyCookies(w http.ResponseWriter, domain, fileName, value string, expires time.Time) { | ||
| cookie := http.Cookie{ | ||
| Name: accessKeyHeaderName, | ||
| Value: value, | ||
| HttpOnly: true, | ||
| Domain: domain, | ||
| Expires: expires, | ||
| } | ||
|
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| cookie.Path = Config.sitePath + fileName | ||
| http.SetCookie(w, &cookie) | ||
|
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| cookie.Path = Config.sitePath + Config.selifPath + fileName | ||
| http.SetCookie(w, &cookie) | ||
| } | ||
|
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| 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 | ||
| } | ||
|
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| fileName := c.URLParams["name"] | ||
|
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| 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 | ||
| } | ||
|
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| if src, err := checkAccessKey(r, &metadata); err != nil { | ||
| // remove invalid cookie | ||
| if src == accessKeySourceCookie { | ||
| setAccessKeyCookies(w, getSiteURL(r), fileName, "", time.Unix(0, 0)) | ||
| } | ||
|
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| if strings.EqualFold("application/json", r.Header.Get("Accept")) { | ||
| dec := json.NewEncoder(w) | ||
| _ = dec.Encode(map[string]string{ | ||
| "error": errInvalidAccessKey.Error(), | ||
| }) | ||
|
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| return | ||
| } | ||
|
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| _ = renderTemplate(Templates["access.html"], pongo2.Context{ | ||
| "filename": fileName, | ||
| "accesspath": fileName, | ||
| }, r, w) | ||
|
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| return | ||
| } | ||
|
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| 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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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,11 @@ | ||
| {% extends "base.html" %} | ||
|
|
||
| {% block content %} | ||
| <div id="access"> | ||
| <form action="{{ unlockpath }}" method="POST" enctype="multipart/form-data"> | ||
| {{ filename }} is protected with password <br /> | ||
| <input id="access_key" name="access_key" type="password" /> | ||
| <input id="submitbtn" type="submit" value="Unlock"> | ||
| </form> | ||
| </div> | ||
| {% endblock %} |
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