367 lines
13 KiB
Go
367 lines
13 KiB
Go
package upstream
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import (
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"net/http"
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"net/url"
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"path"
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"regexp"
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"github.com/gorilla/websocket"
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"gitlab.com/gitlab-org/labkit/log"
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"gitlab.com/gitlab-org/labkit/tracing"
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apipkg "gitlab.com/gitlab-org/gitlab-workhorse/internal/api"
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"gitlab.com/gitlab-org/gitlab-workhorse/internal/artifacts"
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"gitlab.com/gitlab-org/gitlab-workhorse/internal/builds"
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"gitlab.com/gitlab-org/gitlab-workhorse/internal/channel"
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"gitlab.com/gitlab-org/gitlab-workhorse/internal/config"
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"gitlab.com/gitlab-org/gitlab-workhorse/internal/git"
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"gitlab.com/gitlab-org/gitlab-workhorse/internal/helper"
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"gitlab.com/gitlab-org/gitlab-workhorse/internal/imageresizer"
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"gitlab.com/gitlab-org/gitlab-workhorse/internal/lfs"
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proxypkg "gitlab.com/gitlab-org/gitlab-workhorse/internal/proxy"
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"gitlab.com/gitlab-org/gitlab-workhorse/internal/queueing"
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"gitlab.com/gitlab-org/gitlab-workhorse/internal/redis"
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"gitlab.com/gitlab-org/gitlab-workhorse/internal/secret"
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"gitlab.com/gitlab-org/gitlab-workhorse/internal/senddata"
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"gitlab.com/gitlab-org/gitlab-workhorse/internal/sendfile"
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"gitlab.com/gitlab-org/gitlab-workhorse/internal/sendurl"
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"gitlab.com/gitlab-org/gitlab-workhorse/internal/staticpages"
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"gitlab.com/gitlab-org/gitlab-workhorse/internal/upload"
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)
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type matcherFunc func(*http.Request) bool
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type routeEntry struct {
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method string
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regex *regexp.Regexp
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handler http.Handler
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matchers []matcherFunc
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}
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type routeOptions struct {
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tracing bool
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matchers []matcherFunc
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}
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type uploadPreparers struct {
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artifacts upload.Preparer
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lfs upload.Preparer
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packages upload.Preparer
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uploads upload.Preparer
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}
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const (
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apiPattern = `^/api/`
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ciAPIPattern = `^/ci/api/`
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gitProjectPattern = `^/.+\.git/`
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projectPattern = `^/([^/]+/){1,}[^/]+/`
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apiProjectPattern = apiPattern + `v4/projects/[^/]+/` // API: Projects can be encoded via group%2Fsubgroup%2Fproject
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snippetUploadPattern = `^/uploads/personal_snippet`
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userUploadPattern = `^/uploads/user`
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importPattern = `^/import/`
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)
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var (
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// For legacy reasons, user uploads are stored in public/uploads. To
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// prevent anybody who knows/guesses the URL of a user-uploaded file
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// from downloading it we configure static.ServeExisting to treat files
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// under public/uploads/ as if they do not exist.
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staticExclude = []string{"/uploads/"}
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)
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func compileRegexp(regexpStr string) *regexp.Regexp {
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if len(regexpStr) == 0 {
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return nil
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}
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return regexp.MustCompile(regexpStr)
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}
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func withMatcher(f matcherFunc) func(*routeOptions) {
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return func(options *routeOptions) {
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options.matchers = append(options.matchers, f)
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}
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}
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func withoutTracing() func(*routeOptions) {
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return func(options *routeOptions) {
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options.tracing = false
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}
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}
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func (u *upstream) observabilityMiddlewares(handler http.Handler, method string, regexpStr string) http.Handler {
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handler = log.AccessLogger(
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handler,
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log.WithAccessLogger(u.accessLogger),
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log.WithExtraFields(func(r *http.Request) log.Fields {
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return log.Fields{
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"route": regexpStr, // This field matches the `route` label in Prometheus metrics
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}
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}),
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)
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handler = instrumentRoute(handler, method, regexpStr) // Add prometheus metrics
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return handler
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}
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func (u *upstream) route(method, regexpStr string, handler http.Handler, opts ...func(*routeOptions)) routeEntry {
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// Instantiate a route with the defaults
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options := routeOptions{
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tracing: true,
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}
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for _, f := range opts {
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f(&options)
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}
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handler = u.observabilityMiddlewares(handler, method, regexpStr)
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handler = denyWebsocket(handler) // Disallow websockets
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if options.tracing {
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// Add distributed tracing
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handler = tracing.Handler(handler, tracing.WithRouteIdentifier(regexpStr))
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}
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return routeEntry{
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method: method,
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regex: compileRegexp(regexpStr),
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handler: handler,
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matchers: options.matchers,
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}
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}
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func (u *upstream) wsRoute(regexpStr string, handler http.Handler, matchers ...matcherFunc) routeEntry {
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method := "GET"
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handler = u.observabilityMiddlewares(handler, method, regexpStr)
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return routeEntry{
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method: method,
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regex: compileRegexp(regexpStr),
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handler: handler,
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matchers: append(matchers, websocket.IsWebSocketUpgrade),
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}
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}
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// Creates matcherFuncs for a particular content type.
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func isContentType(contentType string) func(*http.Request) bool {
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return func(r *http.Request) bool {
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return helper.IsContentType(contentType, r.Header.Get("Content-Type"))
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}
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}
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func (ro *routeEntry) isMatch(cleanedPath string, req *http.Request) bool {
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if ro.method != "" && req.Method != ro.method {
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return false
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}
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if ro.regex != nil && !ro.regex.MatchString(cleanedPath) {
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return false
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}
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ok := true
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for _, matcher := range ro.matchers {
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ok = matcher(req)
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if !ok {
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break
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}
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}
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return ok
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}
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func buildProxy(backend *url.URL, version string, rt http.RoundTripper, cfg config.Config) http.Handler {
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proxier := proxypkg.NewProxy(backend, version, rt)
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return senddata.SendData(
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sendfile.SendFile(apipkg.Block(proxier)),
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git.SendArchive,
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git.SendBlob,
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git.SendDiff,
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git.SendPatch,
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git.SendSnapshot,
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artifacts.SendEntry,
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sendurl.SendURL,
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imageresizer.NewResizer(cfg),
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)
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}
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// Routing table
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// We match against URI not containing the relativeUrlRoot:
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// see upstream.ServeHTTP
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func configureRoutes(u *upstream) {
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api := apipkg.NewAPI(
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u.Backend,
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u.Version,
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u.RoundTripper,
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)
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static := &staticpages.Static{DocumentRoot: u.DocumentRoot, Exclude: staticExclude}
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proxy := buildProxy(u.Backend, u.Version, u.RoundTripper, u.Config)
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cableProxy := proxypkg.NewProxy(u.CableBackend, u.Version, u.CableRoundTripper)
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assetsNotFoundHandler := NotFoundUnless(u.DevelopmentMode, proxy)
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if u.AltDocumentRoot != "" {
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altStatic := &staticpages.Static{DocumentRoot: u.AltDocumentRoot, Exclude: staticExclude}
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assetsNotFoundHandler = altStatic.ServeExisting(
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u.URLPrefix,
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staticpages.CacheExpireMax,
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NotFoundUnless(u.DevelopmentMode, proxy),
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)
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}
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signingTripper := secret.NewRoundTripper(u.RoundTripper, u.Version)
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signingProxy := buildProxy(u.Backend, u.Version, signingTripper, u.Config)
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preparers := createUploadPreparers(u.Config)
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uploadPath := path.Join(u.DocumentRoot, "uploads/tmp")
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uploadAccelerateProxy := upload.Accelerate(&upload.SkipRailsAuthorizer{TempPath: uploadPath}, proxy, preparers.uploads)
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ciAPIProxyQueue := queueing.QueueRequests("ci_api_job_requests", uploadAccelerateProxy, u.APILimit, u.APIQueueLimit, u.APIQueueTimeout)
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ciAPILongPolling := builds.RegisterHandler(ciAPIProxyQueue, redis.WatchKey, u.APICILongPollingDuration)
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// Serve static files or forward the requests
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defaultUpstream := static.ServeExisting(
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u.URLPrefix,
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staticpages.CacheDisabled,
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static.DeployPage(static.ErrorPagesUnless(u.DevelopmentMode, staticpages.ErrorFormatHTML, uploadAccelerateProxy)),
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)
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probeUpstream := static.ErrorPagesUnless(u.DevelopmentMode, staticpages.ErrorFormatJSON, proxy)
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healthUpstream := static.ErrorPagesUnless(u.DevelopmentMode, staticpages.ErrorFormatText, proxy)
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u.Routes = []routeEntry{
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// Git Clone
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u.route("GET", gitProjectPattern+`info/refs\z`, git.GetInfoRefsHandler(api)),
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u.route("POST", gitProjectPattern+`git-upload-pack\z`, contentEncodingHandler(git.UploadPack(api)), withMatcher(isContentType("application/x-git-upload-pack-request"))),
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u.route("POST", gitProjectPattern+`git-receive-pack\z`, contentEncodingHandler(git.ReceivePack(api)), withMatcher(isContentType("application/x-git-receive-pack-request"))),
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u.route("PUT", gitProjectPattern+`gitlab-lfs/objects/([0-9a-f]{64})/([0-9]+)\z`, lfs.PutStore(api, signingProxy, preparers.lfs), withMatcher(isContentType("application/octet-stream"))),
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// CI Artifacts
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u.route("POST", apiPattern+`v4/jobs/[0-9]+/artifacts\z`, contentEncodingHandler(artifacts.UploadArtifacts(api, signingProxy, preparers.artifacts))),
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u.route("POST", ciAPIPattern+`v1/builds/[0-9]+/artifacts\z`, contentEncodingHandler(artifacts.UploadArtifacts(api, signingProxy, preparers.artifacts))),
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// ActionCable websocket
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u.wsRoute(`^/-/cable\z`, cableProxy),
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// Terminal websocket
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u.wsRoute(projectPattern+`-/environments/[0-9]+/terminal.ws\z`, channel.Handler(api)),
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u.wsRoute(projectPattern+`-/jobs/[0-9]+/terminal.ws\z`, channel.Handler(api)),
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// Proxy Job Services
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u.wsRoute(projectPattern+`-/jobs/[0-9]+/proxy.ws\z`, channel.Handler(api)),
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// Long poll and limit capacity given to jobs/request and builds/register.json
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u.route("", apiPattern+`v4/jobs/request\z`, ciAPILongPolling),
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u.route("", ciAPIPattern+`v1/builds/register.json\z`, ciAPILongPolling),
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// Not all API endpoints support encoded project IDs
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// (e.g. `group%2Fproject`), but for the sake of consistency we
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// use the apiProjectPattern regex throughout. API endpoints
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// that do not support this will return 400 regardless of
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// whether they are accelerated by Workhorse or not. See
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// https://gitlab.com/gitlab-org/gitlab/-/merge_requests/56731.
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// Maven Artifact Repository
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u.route("PUT", apiProjectPattern+`packages/maven/`, upload.BodyUploader(api, signingProxy, preparers.packages)),
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// Conan Artifact Repository
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u.route("PUT", apiPattern+`v4/packages/conan/`, upload.BodyUploader(api, signingProxy, preparers.packages)),
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u.route("PUT", apiProjectPattern+`packages/conan/`, upload.BodyUploader(api, signingProxy, preparers.packages)),
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// Generic Packages Repository
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u.route("PUT", apiProjectPattern+`packages/generic/`, upload.BodyUploader(api, signingProxy, preparers.packages)),
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// NuGet Artifact Repository
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u.route("PUT", apiProjectPattern+`packages/nuget/`, upload.Accelerate(api, signingProxy, preparers.packages)),
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// PyPI Artifact Repository
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u.route("POST", apiProjectPattern+`packages/pypi`, upload.Accelerate(api, signingProxy, preparers.packages)),
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// Debian Artifact Repository
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u.route("PUT", apiProjectPattern+`packages/debian/`, upload.BodyUploader(api, signingProxy, preparers.packages)),
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// Gem Artifact Repository
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u.route("POST", apiProjectPattern+`packages/rubygems/`, upload.BodyUploader(api, signingProxy, preparers.packages)),
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// Terraform Module Package Repository
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u.route("PUT", apiProjectPattern+`packages/terraform/modules/`, upload.BodyUploader(api, signingProxy, preparers.packages)),
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// Helm Artifact Repository
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u.route("POST", apiProjectPattern+`packages/helm/api/[^/]+/charts\z`, upload.Accelerate(api, signingProxy, preparers.packages)),
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// We are porting API to disk acceleration
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// we need to declare each routes until we have fixed all the routes on the rails codebase.
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// Overall status can be seen at https://gitlab.com/groups/gitlab-org/-/epics/1802#current-status
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u.route("POST", apiProjectPattern+`wikis/attachments\z`, uploadAccelerateProxy),
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u.route("POST", apiPattern+`graphql\z`, uploadAccelerateProxy),
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u.route("POST", apiPattern+`v4/groups/import`, upload.Accelerate(api, signingProxy, preparers.uploads)),
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u.route("POST", apiPattern+`v4/projects/import`, upload.Accelerate(api, signingProxy, preparers.uploads)),
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// Project Import via UI upload acceleration
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u.route("POST", importPattern+`gitlab_project`, upload.Accelerate(api, signingProxy, preparers.uploads)),
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// Group Import via UI upload acceleration
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u.route("POST", importPattern+`gitlab_group`, upload.Accelerate(api, signingProxy, preparers.uploads)),
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// Metric image upload
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u.route("POST", apiProjectPattern+`issues/[0-9]+/metric_images\z`, upload.Accelerate(api, signingProxy, preparers.uploads)),
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// Requirements Import via UI upload acceleration
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u.route("POST", projectPattern+`requirements_management/requirements/import_csv`, upload.Accelerate(api, signingProxy, preparers.uploads)),
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// Uploads via API
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u.route("POST", apiProjectPattern+`uploads\z`, upload.Accelerate(api, signingProxy, preparers.uploads)),
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// Explicitly proxy API requests
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u.route("", apiPattern, proxy),
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u.route("", ciAPIPattern, proxy),
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// Serve assets
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u.route(
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"", `^/assets/`,
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static.ServeExisting(
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u.URLPrefix,
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staticpages.CacheExpireMax,
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assetsNotFoundHandler,
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),
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withoutTracing(), // Tracing on assets is very noisy
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),
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// Uploads
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u.route("POST", projectPattern+`uploads\z`, upload.Accelerate(api, signingProxy, preparers.uploads)),
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u.route("POST", snippetUploadPattern, upload.Accelerate(api, signingProxy, preparers.uploads)),
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u.route("POST", userUploadPattern, upload.Accelerate(api, signingProxy, preparers.uploads)),
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// health checks don't intercept errors and go straight to rails
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// TODO: We should probably not return a HTML deploy page?
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// https://gitlab.com/gitlab-org/gitlab-workhorse/issues/230
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u.route("", "^/-/(readiness|liveness)$", static.DeployPage(probeUpstream)),
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u.route("", "^/-/health$", static.DeployPage(healthUpstream)),
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// This route lets us filter out health checks from our metrics.
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u.route("", "^/-/", defaultUpstream),
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u.route("", "", defaultUpstream),
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}
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}
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func createUploadPreparers(cfg config.Config) uploadPreparers {
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defaultPreparer := upload.NewObjectStoragePreparer(cfg)
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return uploadPreparers{
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artifacts: defaultPreparer,
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lfs: lfs.NewLfsUploadPreparer(cfg, defaultPreparer),
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packages: defaultPreparer,
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uploads: defaultPreparer,
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}
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}
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func denyWebsocket(next http.Handler) http.Handler {
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return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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if websocket.IsWebSocketUpgrade(r) {
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helper.HTTPError(w, r, "websocket upgrade not allowed", http.StatusBadRequest)
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return
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}
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next.ServeHTTP(w, r)
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})
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}
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