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package domain
import (
"crypto/tls"
"errors"
"net/http"
"sync"
"time"
"gitlab.com/gitlab-org/gitlab-pages/internal/httperrors"
"gitlab.com/gitlab-org/gitlab-pages/internal/serving"
)
// GroupConfig represents a per-request config for a group domain
type GroupConfig interface {
IsHTTPSOnly(*http.Request) bool
HasAccessControl(*http.Request) bool
IsNamespaceProject(*http.Request) bool
ProjectID(*http.Request) uint64
ProjectExists(*http.Request) bool
}
// Domain is a domain that gitlab-pages can serve.
type Domain struct {
Group string
Project string
DomainName string
Certificate string
Key string
HTTPSOnly bool
ProjectID uint64
AccessControl bool
GroupConfig GroupConfig // handles group domain config
Serving serving.Serving
certificate *tls.Certificate
certificateError error
certificateOnce sync.Once
}
// String implements Stringer.
func (d *Domain) String() string {
if d.Group != "" && d.Project != "" {
return d.Group + "/" + d.Project
}
if d.Group != "" {
return d.Group
}
return d.Project
}
func (d *Domain) isCustomDomain() bool {
return d.GroupConfig == nil
}
// IsHTTPSOnly figures out if the request should be handled with HTTPS
// only by looking at group and project level config.
func (d *Domain) IsHTTPSOnly(r *http.Request) bool {
if d == nil {
return false
}
// Check custom domain config (e.g. http://example.com)
if d.isCustomDomain() {
return d.HTTPSOnly
}
// Check projects served under the group domain, including the default one
return d.GroupConfig.IsHTTPSOnly(r)
}
// IsAccessControlEnabled figures out if the request is to a project that has access control enabled
func (d *Domain) IsAccessControlEnabled(r *http.Request) bool {
if d == nil {
return false
}
// Check custom domain config (e.g. http://example.com)
if d.isCustomDomain() {
return d.AccessControl
}
// Check projects served under the group domain, including the default one
return d.GroupConfig.HasAccessControl(r)
}
// HasAcmeChallenge checks domain directory contains particular acme challenge
func (d *Domain) HasAcmeChallenge(token string) bool {
if d == nil {
return false
}
if !d.isCustomDomain() {
return false
}
return d.Serving.HasAcmeChallenge(token)
}
// IsNamespaceProject figures out if the request is to a namespace project
func (d *Domain) IsNamespaceProject(r *http.Request) bool {
if d == nil {
return false
}
// If request is to a custom domain, we do not handle it as a namespace project
// as there can't be multiple projects under the same custom domain
if d.isCustomDomain() {
return false
}
// Check projects served under the group domain, including the default one
return d.GroupConfig.IsNamespaceProject(r)
}
// GetID figures out what is the ID of the project user tries to access
func (d *Domain) GetID(r *http.Request) uint64 {
if d == nil {
return 0
}
if d.isCustomDomain() {
return d.ProjectID
}
return d.GroupConfig.ProjectID(r)
}
// HasProject figures out if the project exists that the user tries to access
func (d *Domain) HasProject(r *http.Request) bool {
if d == nil {
return false
}
if d.isCustomDomain() {
return true
}
return d.GroupConfig.ProjectExists(r)
}
// EnsureCertificate parses the PEM-encoded certificate for the domain
func (d *Domain) EnsureCertificate() (*tls.Certificate, error) {
if !d.isCustomDomain() {
return nil, errors.New("tls certificates can be loaded only for pages with configuration")
}
d.certificateOnce.Do(func() {
var cert tls.Certificate
cert, d.certificateError = tls.X509KeyPair([]byte(d.Certificate), []byte(d.Key))
if d.certificateError == nil {
d.certificate = &cert
}
})
return d.certificate, d.certificateError
}
// ServeFileHTTP returns true if something was served, false if not.
func (d *Domain) ServeFileHTTP(w http.ResponseWriter, r *http.Request) bool {
if d == nil {
httperrors.Serve404(w)
return true
}
if !d.IsAccessControlEnabled(r) {
// Set caching headers
w.Header().Set("Cache-Control", "max-age=600")
w.Header().Set("Expires", time.Now().Add(10*time.Minute).Format(time.RFC1123))
}
return d.Serving.ServeFileHTTP(w, r)
}
// ServeNotFoundHTTP serves the not found pages from the projects.
func (d *Domain) ServeNotFoundHTTP(w http.ResponseWriter, r *http.Request) {
if d == nil {
httperrors.Serve404(w)
return
}
d.Serving.ServeNotFoundHTTP(w, r)
}
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