Add oauth pass-thru option for datasources

pkg/api/login_oauth.go

@@ -165,6 +165,7 @@ func (hs *HTTPServer) OAuthLogin(ctx *m.ReqContext) {
 
 	extUser := &m.ExternalUserInfo{
 		AuthModule: "oauth_" + name,
+		OAuthToken: token,
 		AuthId:     userInfo.Id,
 		Name:       userInfo.Name,
 		Login:      userInfo.Login,

pkg/api/pluginproxy/ds_proxy.go

@@ -14,11 +14,14 @@ import (
 	"time"
 
 	"github.com/opentracing/opentracing-go"
+	"golang.org/x/oauth2"
 
+	"github.com/grafana/grafana/pkg/bus"
 	"github.com/grafana/grafana/pkg/log"
 	m "github.com/grafana/grafana/pkg/models"
 	"github.com/grafana/grafana/pkg/plugins"
 	"github.com/grafana/grafana/pkg/setting"
+	"github.com/grafana/grafana/pkg/social"
 	"github.com/grafana/grafana/pkg/util"
 )
 
@@ -215,6 +218,44 @@ func (proxy *DataSourceProxy) getDirector() func(req *http.Request) {
 		if proxy.route != nil {
 			ApplyRoute(proxy.ctx.Req.Context(), req, proxy.proxyPath, proxy.route, proxy.ds)
 		}
+
+		if proxy.ds.JsonData != nil && proxy.ds.JsonData.Get("oauthPassThru").MustBool() {
+			provider := proxy.ds.JsonData.Get("oauthPassThruProvider").MustString()
+			connect, ok := social.SocialMap[strings.TrimPrefix(provider, "oauth_")] // The socialMap keys don't have "oauth_" prefix, but everywhere else in the system does
+			if !ok {
+				logger.Error("Failed to find oauth provider with given name", "provider", provider)
+			}
+			cmd := &m.GetAuthInfoQuery{UserId: proxy.ctx.UserId, AuthModule: provider}
+			if err := bus.Dispatch(cmd); err != nil {
+				logger.Error("Error feching oauth information for user", "error", err)
+			}
+
+			// TokenSource handles refreshing the token if it has expired
+			token, err := connect.TokenSource(proxy.ctx.Req.Context(), &oauth2.Token{
+				AccessToken:  cmd.Result.OAuthAccessToken,
+				Expiry:       cmd.Result.OAuthExpiry,
+				RefreshToken: cmd.Result.OAuthRefreshToken,
+				TokenType:    cmd.Result.OAuthTokenType,
+			}).Token()
+			if err != nil {
+				logger.Error("Failed to retrieve access token from oauth provider", "provider", cmd.Result.AuthModule)
+			}
+
+			// If the tokens are not the same, update the entry in the DB
+			if token.AccessToken != cmd.Result.OAuthAccessToken {
+				cmd2 := &m.UpdateAuthInfoCommand{
+					UserId:     cmd.Result.Id,
+					AuthModule: cmd.Result.AuthModule,
+					AuthId:     cmd.Result.AuthId,
+					OAuthToken: token,
+				}
+				if err := bus.Dispatch(cmd2); err != nil {
+					logger.Error("Failed to update access token during token refresh", "error", err)
+				}
+			}
+			req.Header.Del("Authorization")
+			req.Header.Add("Authorization", fmt.Sprintf("%s %s", token.Type(), token.AccessToken))
+		}
 	}
 }
 

pkg/api/pluginproxy/ds_proxy_test.go

@@ -9,13 +9,16 @@ import (
 	"testing"
 	"time"
 
+	"golang.org/x/oauth2"
 	macaron "gopkg.in/macaron.v1"
 
+	"github.com/grafana/grafana/pkg/bus"
 	"github.com/grafana/grafana/pkg/components/simplejson"
 	"github.com/grafana/grafana/pkg/log"
 	m "github.com/grafana/grafana/pkg/models"
 	"github.com/grafana/grafana/pkg/plugins"
 	"github.com/grafana/grafana/pkg/setting"
+	"github.com/grafana/grafana/pkg/social"
 	"github.com/grafana/grafana/pkg/util"
 	. "github.com/smartystreets/goconvey/convey"
 )
@@ -388,6 +391,55 @@ func TestDSRouteRule(t *testing.T) {
 				So(req.Header.Get("X-Canary"), ShouldEqual, "stillthere")
 			})
 		})
+
+		Convey("When proxying a datasource that has oauth token pass-thru enabled", func() {
+			social.SocialMap["generic_oauth"] = &social.SocialGenericOAuth{
+				SocialBase: &social.SocialBase{
+					Config: &oauth2.Config{},
+				},
+			}
+
+			bus.AddHandler("test", func(query *m.GetAuthInfoQuery) error {
+				query.Result = &m.UserAuth{
+					Id:                1,
+					UserId:            1,
+					AuthModule:        "generic_oauth",
+					OAuthAccessToken:  "testtoken",
+					OAuthRefreshToken: "testrefreshtoken",
+					OAuthTokenType:    "Bearer",
+					OAuthExpiry:       time.Now().AddDate(0, 0, 1),
+				}
+				return nil
+			})
+
+			plugin := &plugins.DataSourcePlugin{}
+			ds := &m.DataSource{
+				Type: "custom-datasource",
+				Url:  "http://host/root/",
+				JsonData: simplejson.NewFromAny(map[string]interface{}{
+					"oauthPassThru":         true,
+					"oauthPassThruProvider": "oauth_generic_oauth",
+				}),
+			}
+
+			req, _ := http.NewRequest("GET", "http://localhost/asd", nil)
+			ctx := &m.ReqContext{
+				SignedInUser: &m.SignedInUser{UserId: 1},
+				Context: &macaron.Context{
+					Req: macaron.Request{Request: req},
+				},
+			}
+			proxy := NewDataSourceProxy(ds, plugin, ctx, "/path/to/folder/")
+			req, err := http.NewRequest(http.MethodGet, "http://grafana.com/sub", nil)
+
+			So(err, ShouldBeNil)
+
+			proxy.getDirector()(req)
+
+			Convey("Should have access token in header", func() {
+				So(req.Header.Get("Authorization"), ShouldEqual, fmt.Sprintf("%s %s", "Bearer", "testtoken"))
+			})
+		})
 	})
 }