convert 500 error returned by Admiral to duplicate project error when creating duplicate project

src/common/utils/error/error.go

@@ -15,9 +15,12 @@
 package error
 
 import (
+	"errors"
 	"fmt"
 )
 
+var DupProjectErr = errors.New("duplicate project")
+
 // HTTPError : if response is returned but the status code is not 200, an Error instance will be returned
 type HTTPError struct {
 	StatusCode int

src/ui/api/project.go

@@ -23,6 +23,7 @@ import (
 	"github.com/vmware/harbor/src/common/dao"
 	"github.com/vmware/harbor/src/common/models"
 	"github.com/vmware/harbor/src/common/utils"
+	errutil "github.com/vmware/harbor/src/common/utils/error"
 	"github.com/vmware/harbor/src/common/utils/log"
 	"github.com/vmware/harbor/src/ui/config"
 
@@ -44,7 +45,6 @@ type ProjectAPI struct {
 const projectNameMaxLen int = 30
 const projectNameMinLen int = 2
 const restrictedNameChars = `[a-z0-9]+(?:[._-][a-z0-9]+)*`
-const dupProjectPattern = `Duplicate entry '\w+' for key 'name'`
 
 // Prepare validates the URL and the user
 func (p *ProjectAPI) Prepare() {
@@ -130,8 +130,7 @@ func (p *ProjectAPI) Post() {
 		AutomaticallyScanImagesOnPush:              pro.AutomaticallyScanImagesOnPush,
 	})
 	if err != nil {
-		dup, _ := regexp.MatchString(dupProjectPattern, err.Error())
-		if dup {
+		if err == errutil.DupProjectErr {
 			log.Debugf("conflict %s", pro.Name)
 			p.RenderError(http.StatusConflict, "")
 		} else {

src/ui/projectmanager/db/pm.go

@@ -16,12 +16,17 @@ package db
 
 import (
 	"fmt"
+	"regexp"
 	"time"
 
 	"github.com/vmware/harbor/src/common/dao"
 	"github.com/vmware/harbor/src/common/models"
+	errutil "github.com/vmware/harbor/src/common/utils/error"
+	"github.com/vmware/harbor/src/common/utils/log"
 )
 
+const dupProjectPattern = `Duplicate entry '\w+' for key 'name'`
+
 // ProjectManager implements pm.PM interface based on database
 type ProjectManager struct{}
 
@@ -105,7 +110,21 @@ func (p *ProjectManager) Create(project *models.Project) (int64, error) {
 		UpdateTime:   t,
 	}
 
-	return dao.AddProject(*pro)
+	id, err := dao.AddProject(*pro)
+	if err != nil {
+		dup, e := regexp.MatchString(dupProjectPattern, err.Error())
+		if e != nil {
+			log.Errorf("failed to match duplicate project pattern: %v", e)
+		}
+
+		if dup {
+			err = errutil.DupProjectErr
+		}
+
+		return 0, err
+	}
+
+	return id, nil
 }
 
 // Delete ...

src/ui/projectmanager/pms/pm.go

@@ -22,6 +22,7 @@ import (
 	"io"
 	"io/ioutil"
 	"net/http"
+	"regexp"
 	"strconv"
 	"strings"
 
@@ -31,6 +32,8 @@ import (
 	"github.com/vmware/harbor/src/common/utils/log"
 )
 
+const dupProjectPattern = `Project name '\w+' is already used`
+
 // ProjectManager implements projectmanager.ProjecdtManager interface
 // base on project management service
 type ProjectManager struct {
@@ -366,6 +369,33 @@ func (p *ProjectManager) Create(pro *models.Project) (int64, error) {
 
 	b, err := p.send(http.MethodPost, "/projects", bytes.NewBuffer(data))
 	if err != nil {
+		// when creating a project with a duplicate name in Admiral, a 500 error
+		// with a specific message will be returned for now.
+		// Maybe a 409 error will be returned if Admiral team finds the way to
+		// return a specific code in Xenon.
+		// The following codes convert both those two errors to DupProjectErr
+		httpErr, ok := err.(*er.HTTPError)
+		if !ok {
+			return 0, err
+		}
+
+		if httpErr.StatusCode == http.StatusConflict {
+			return 0, er.DupProjectErr
+		}
+
+		if httpErr.StatusCode != http.StatusInternalServerError {
+			return 0, err
+		}
+
+		match, e := regexp.MatchString(dupProjectPattern, httpErr.Detail)
+		if e != nil {
+			log.Errorf("failed to match duplicate project mattern: %v", e)
+		}
+
+		if match {
+			err = er.DupProjectErr
+		}
+
 		return 0, err
 	}