routes/api: change status handle to new style

Also fixed one bug that did not catch team not found error.

models/errors/org.go

@@ -0,0 +1,21 @@
+// Copyright 2018 The Gogs Authors. All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+
+package errors
+
+import "fmt"
+
+type TeamNotExist struct {
+	TeamID int64
+	Name   string
+}
+
+func IsTeamNotExist(err error) bool {
+	_, ok := err.(TeamNotExist)
+	return ok
+}
+
+func (err TeamNotExist) Error() string {
+	return fmt.Sprintf("team does not exist [team_id: %d, name: %s]", err.TeamID, err.Name)
+}

models/org.go

@@ -15,8 +15,7 @@ import (
 )
 
 var (
-	ErrOrgNotExist  = errors.New("Organization does not exist")
+	ErrOrgNotExist = errors.New("Organization does not exist")
-	ErrTeamNotExist = errors.New("Team does not exist")
 )
 
 // IsOwnedBy returns true if given user is in the owner team.

models/org_team.go

@@ -5,11 +5,12 @@
 package models
 
 import (
-	"errors"
 	"fmt"
 	"strings"
 
 	"github.com/go-xorm/xorm"
+
+	"github.com/gogs/gogs/models/errors"
 )
 
 const OWNER_TEAM = "Owners"
@@ -274,7 +275,7 @@ func getTeamOfOrgByName(e Engine, orgID int64, name string) (*Team, error) {
 	if err != nil {
 		return nil, err
 	} else if !has {
-		return nil, ErrTeamNotExist
+		return nil, errors.TeamNotExist{0, name}
 	}
 	return t, nil
 }
@@ -290,7 +291,7 @@ func getTeamByID(e Engine, teamID int64) (*Team, error) {
 	if err != nil {
 		return nil, err
 	} else if !has {
-		return nil, ErrTeamNotExist
+		return nil, errors.TeamNotExist{teamID, ""}
 	}
 	return t, nil
 }

pkg/context/api.go

@@ -6,6 +6,7 @@ package context
 
 import (
 	"fmt"
+	"net/http"
 	"strings"
 
 	"github.com/Unknwon/paginater"
@@ -33,7 +34,7 @@ func (c *APIContext) Error(status int, title string, obj interface{}) {
 		message = obj.(string)
 	}
 
-	if status == 500 {
+	if status == http.StatusInternalServerError {
 		log.Error(3, "%s: %s", title, message)
 	}
 
@@ -43,6 +44,27 @@ func (c *APIContext) Error(status int, title string, obj interface{}) {
 	})
 }
 
+// NotFound renders the 404 response.
+func (c *APIContext) NotFound() {
+	c.Status(http.StatusNotFound)
+}
+
+// ServerError renders the 500 response.
+func (c *APIContext) ServerError(title string, err error) {
+	c.Error(http.StatusInternalServerError, title, err)
+}
+
+// NotFoundOrServerError use error check function to determine if the error
+// is about not found. It responses with 404 status code for not found error,
+// or error context description for logging purpose of 500 server error.
+func (c *APIContext) NotFoundOrServerError(title string, errck func(error) bool, err error) {
+	if errck(err) {
+		c.NotFound()
+		return
+	}
+	c.ServerError(title, err)
+}
+
 // SetLinkHeader sets pagination link header by given total number and page size.
 func (c *APIContext) SetLinkHeader(total, pageSize int) {
 	page := paginater.New(total, pageSize, c.QueryInt("page"), 0)

routes/api/v1/api.go

@@ -5,6 +5,7 @@
 package v1
 
 import (
+	"net/http"
 	"strings"
 
 	"github.com/go-macaron/binding"
@@ -39,43 +40,34 @@ func repoAssignment() macaron.Handler {
 		} else {
 			owner, err = models.GetUserByName(userName)
 			if err != nil {
-				if errors.IsUserNotExist(err) {
+				c.NotFoundOrServerError("GetUserByName", errors.IsUserNotExist, err)
-					c.Status(404)
-				} else {
-					c.Error(500, "GetUserByName", err)
-				}
 				return
 			}
 		}
 		c.Repo.Owner = owner
 
-		// Get repository.
 		repo, err := models.GetRepositoryByName(owner.ID, repoName)
 		if err != nil {
-			if errors.IsRepoNotExist(err) {
+			c.NotFoundOrServerError("GetRepositoryByName", errors.IsRepoNotExist, err)
-				c.Status(404)
-			} else {
-				c.Error(500, "GetRepositoryByName", err)
-			}
 			return
 		} else if err = repo.GetOwner(); err != nil {
-			c.Error(500, "GetOwner", err)
+			c.ServerError("GetOwner", err)
 			return
 		}
 
 		if c.IsTokenAuth && c.User.IsAdmin {
 			c.Repo.AccessMode = models.ACCESS_MODE_OWNER
 		} else {
-			mode, err := models.AccessLevel(c.User.ID, repo)
+			mode, err := models.AccessLevel(c.UserID(), repo)
 			if err != nil {
-				c.Error(500, "AccessLevel", err)
+				c.ServerError("AccessLevel", err)
 				return
 			}
 			c.Repo.AccessMode = mode
 		}
 
 		if !c.Repo.HasAccess() {
-			c.Status(404)
+			c.NotFound()
 			return
 		}
 
@@ -87,7 +79,7 @@ func repoAssignment() macaron.Handler {
 func reqToken() macaron.Handler {
 	return func(c *context.Context) {
 		if !c.IsTokenAuth {
-			c.Error(401)
+			c.Error(http.StatusUnauthorized)
 			return
 		}
 	}
@@ -96,7 +88,7 @@ func reqToken() macaron.Handler {
 func reqBasicAuth() macaron.Handler {
 	return func(c *context.Context) {
 		if !c.IsBasicAuth {
-			c.Error(401)
+			c.Error(http.StatusUnauthorized)
 			return
 		}
 	}
@@ -105,7 +97,7 @@ func reqBasicAuth() macaron.Handler {
 func reqAdmin() macaron.Handler {
 	return func(c *context.Context) {
 		if !c.IsLogged || !c.User.IsAdmin {
-			c.Error(403)
+			c.Error(http.StatusForbidden)
 			return
 		}
 	}
@@ -114,7 +106,7 @@ func reqAdmin() macaron.Handler {
 func reqRepoWriter() macaron.Handler {
 	return func(c *context.Context) {
 		if !c.Repo.IsWriter() {
-			c.Error(403)
+			c.Error(http.StatusForbidden)
 			return
 		}
 	}
@@ -138,11 +130,7 @@ func orgAssignment(args ...bool) macaron.Handler {
 		if assignOrg {
 			c.Org.Organization, err = models.GetUserByName(c.Params(":orgname"))
 			if err != nil {
-				if errors.IsUserNotExist(err) {
+				c.NotFoundOrServerError("GetUserByName", errors.IsUserNotExist, err)
-					c.Status(404)
-				} else {
-					c.Error(500, "GetUserByName", err)
-				}
 				return
 			}
 		}
@@ -150,11 +138,7 @@ func orgAssignment(args ...bool) macaron.Handler {
 		if assignTeam {
 			c.Org.Team, err = models.GetTeamByID(c.ParamsInt64(":teamid"))
 			if err != nil {
-				if errors.IsUserNotExist(err) {
+				c.NotFoundOrServerError("GetTeamByID", errors.IsTeamNotExist, err)
-					c.Status(404)
-				} else {
-					c.Error(500, "GetTeamById", err)
-				}
 				return
 			}
 		}
@@ -163,7 +147,7 @@ func orgAssignment(args ...bool) macaron.Handler {
 
 func mustEnableIssues(c *context.APIContext) {
 	if !c.Repo.Repository.EnableIssues || c.Repo.Repository.EnableExternalTracker {
-		c.Status(404)
+		c.NotFound()
 		return
 	}
 }
@@ -326,7 +310,7 @@ func RegisterRoutes(m *macaron.Macaron) {
 		}, orgAssignment(true))
 
 		m.Any("/*", func(c *context.Context) {
-			c.Error(404)
+			c.NotFound()
 		})
 
 		m.Group("/admin", func() {