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middleware.go
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middleware.go
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package middleware
import (
"net/http"
"net/url"
"strconv"
"time"
"github.com/grafana/grafana/pkg/bus"
"github.com/grafana/grafana/pkg/components/apikeygen"
"github.com/grafana/grafana/pkg/log"
m "github.com/grafana/grafana/pkg/models"
"github.com/grafana/grafana/pkg/services/session"
"github.com/grafana/grafana/pkg/setting"
"github.com/grafana/grafana/pkg/util"
macaron "gopkg.in/macaron.v1"
)
var (
ReqGrafanaAdmin = Auth(&AuthOptions{ReqSignedIn: true, ReqGrafanaAdmin: true})
ReqSignedIn = Auth(&AuthOptions{ReqSignedIn: true})
ReqEditorRole = RoleAuth(m.ROLE_EDITOR, m.ROLE_ADMIN)
ReqOrgAdmin = RoleAuth(m.ROLE_ADMIN)
)
func GetContextHandler(ats m.UserTokenService) macaron.Handler {
return func(c *macaron.Context) {
ctx := &m.ReqContext{
Context: c,
SignedInUser: &m.SignedInUser{},
Session: session.GetSession(), // should only be used by auth_proxy
IsSignedIn: false,
AllowAnonymous: false,
SkipCache: false,
Logger: log.New("context"),
}
orgId := int64(0)
orgIdHeader := ctx.Req.Header.Get("X-Grafana-Org-Id")
if orgIdHeader != "" {
orgId, _ = strconv.ParseInt(orgIdHeader, 10, 64)
}
// the order in which these are tested are important
// look for api key in Authorization header first
// then init session and look for userId in session
// then look for api key in session (special case for render calls via api)
// then test if anonymous access is enabled
switch {
case initContextWithRenderAuth(ctx):
case initContextWithApiKey(ctx):
case initContextWithBasicAuth(ctx, orgId):
case initContextWithAuthProxy(ctx, orgId):
case initContextWithToken(ats, ctx, orgId):
case initContextWithAnonymousUser(ctx):
}
ctx.Logger = log.New("context", "userId", ctx.UserId, "orgId", ctx.OrgId, "uname", ctx.Login)
ctx.Data["ctx"] = ctx
c.Map(ctx)
// update last seen every 5min
if ctx.ShouldUpdateLastSeenAt() {
ctx.Logger.Debug("Updating last user_seen_at", "user_id", ctx.UserId)
if err := bus.Dispatch(&m.UpdateUserLastSeenAtCommand{UserId: ctx.UserId}); err != nil {
ctx.Logger.Error("Failed to update last_seen_at", "error", err)
}
}
}
}
func initContextWithAnonymousUser(ctx *m.ReqContext) bool {
if !setting.AnonymousEnabled {
return false
}
orgQuery := m.GetOrgByNameQuery{Name: setting.AnonymousOrgName}
if err := bus.Dispatch(&orgQuery); err != nil {
log.Error(3, "Anonymous access organization error: '%s': %s", setting.AnonymousOrgName, err)
return false
}
ctx.IsSignedIn = false
ctx.AllowAnonymous = true
ctx.SignedInUser = &m.SignedInUser{IsAnonymous: true}
ctx.OrgRole = m.RoleType(setting.AnonymousOrgRole)
ctx.OrgId = orgQuery.Result.Id
ctx.OrgName = orgQuery.Result.Name
return true
}
func initContextWithApiKey(ctx *m.ReqContext) bool {
var keyString string
if keyString = getApiKey(ctx); keyString == "" {
return false
}
// base64 decode key
decoded, err := apikeygen.Decode(keyString)
if err != nil {
ctx.JsonApiErr(401, "Invalid API key", err)
return true
}
// fetch key
keyQuery := m.GetApiKeyByNameQuery{KeyName: decoded.Name, OrgId: decoded.OrgId}
if err := bus.Dispatch(&keyQuery); err != nil {
ctx.JsonApiErr(401, "Invalid API key", err)
return true
}
apikey := keyQuery.Result
// validate api key
if !apikeygen.IsValid(decoded, apikey.Key) {
ctx.JsonApiErr(401, "Invalid API key", err)
return true
}
ctx.IsSignedIn = true
ctx.SignedInUser = &m.SignedInUser{}
ctx.OrgRole = apikey.Role
ctx.ApiKeyId = apikey.Id
ctx.OrgId = apikey.OrgId
return true
}
func initContextWithBasicAuth(ctx *m.ReqContext, orgId int64) bool {
if !setting.BasicAuthEnabled {
return false
}
header := ctx.Req.Header.Get("Authorization")
if header == "" {
return false
}
username, password, err := util.DecodeBasicAuthHeader(header)
if err != nil {
ctx.JsonApiErr(401, "Invalid Basic Auth Header", err)
return true
}
loginQuery := m.GetUserByLoginQuery{LoginOrEmail: username}
if err := bus.Dispatch(&loginQuery); err != nil {
ctx.JsonApiErr(401, "Basic auth failed", err)
return true
}
user := loginQuery.Result
loginUserQuery := m.LoginUserQuery{Username: username, Password: password, User: user}
if err := bus.Dispatch(&loginUserQuery); err != nil {
ctx.JsonApiErr(401, "Invalid username or password", err)
return true
}
query := m.GetSignedInUserQuery{UserId: user.Id, OrgId: orgId}
if err := bus.Dispatch(&query); err != nil {
ctx.JsonApiErr(401, "Authentication error", err)
return true
}
ctx.SignedInUser = query.Result
ctx.IsSignedIn = true
return true
}
func initContextWithToken(authTokenService m.UserTokenService, ctx *m.ReqContext, orgID int64) bool {
rawToken := ctx.GetCookie(setting.LoginCookieName)
if rawToken == "" {
return false
}
token, err := authTokenService.LookupToken(rawToken)
if err != nil {
ctx.Logger.Error("failed to look up user based on cookie", "error", err)
WriteSessionCookie(ctx, "", -1)
return false
}
query := m.GetSignedInUserQuery{UserId: token.UserId, OrgId: orgID}
if err := bus.Dispatch(&query); err != nil {
ctx.Logger.Error("failed to get user with id", "userId", token.UserId, "error", err)
return false
}
ctx.SignedInUser = query.Result
ctx.IsSignedIn = true
ctx.UserToken = token
rotated, err := authTokenService.TryRotateToken(token, ctx.RemoteAddr(), ctx.Req.UserAgent())
if err != nil {
ctx.Logger.Error("failed to rotate token", "error", err)
return true
}
if rotated {
WriteSessionCookie(ctx, token.UnhashedToken, setting.LoginMaxLifetimeDays)
}
return true
}
func WriteSessionCookie(ctx *m.ReqContext, value string, maxLifetimeDays int) {
if setting.Env == setting.DEV {
ctx.Logger.Info("new token", "unhashed token", value)
}
var maxAge int
if maxLifetimeDays <= 0 {
maxAge = -1
} else {
maxAgeHours := (time.Duration(setting.LoginMaxLifetimeDays) * 24 * time.Hour) + time.Hour
maxAge = int(maxAgeHours.Seconds())
}
ctx.Resp.Header().Del("Set-Cookie")
cookie := http.Cookie{
Name: setting.LoginCookieName,
Value: url.QueryEscape(value),
HttpOnly: true,
Path: setting.AppSubUrl + "/",
Secure: setting.CookieSecure,
MaxAge: maxAge,
SameSite: setting.CookieSameSite,
}
http.SetCookie(ctx.Resp, &cookie)
}
func AddDefaultResponseHeaders() macaron.Handler {
return func(ctx *m.ReqContext) {
if ctx.IsApiRequest() && ctx.Req.Method == "GET" {
ctx.Resp.Header().Add("Cache-Control", "no-cache")
ctx.Resp.Header().Add("Pragma", "no-cache")
ctx.Resp.Header().Add("Expires", "-1")
}
}
}