/
routes.go
247 lines (203 loc) · 7.68 KB
/
routes.go
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package upstream
import (
"net/http"
"net/url"
"path"
"regexp"
"github.com/gorilla/websocket"
"gitlab.com/gitlab-org/labkit/tracing"
apipkg "gitlab.com/gitlab-org/gitlab-workhorse/internal/api"
"gitlab.com/gitlab-org/gitlab-workhorse/internal/artifacts"
"gitlab.com/gitlab-org/gitlab-workhorse/internal/builds"
"gitlab.com/gitlab-org/gitlab-workhorse/internal/channel"
"gitlab.com/gitlab-org/gitlab-workhorse/internal/filestore"
"gitlab.com/gitlab-org/gitlab-workhorse/internal/git"
"gitlab.com/gitlab-org/gitlab-workhorse/internal/helper"
"gitlab.com/gitlab-org/gitlab-workhorse/internal/lfs"
proxypkg "gitlab.com/gitlab-org/gitlab-workhorse/internal/proxy"
"gitlab.com/gitlab-org/gitlab-workhorse/internal/queueing"
"gitlab.com/gitlab-org/gitlab-workhorse/internal/redis"
"gitlab.com/gitlab-org/gitlab-workhorse/internal/secret"
"gitlab.com/gitlab-org/gitlab-workhorse/internal/senddata"
"gitlab.com/gitlab-org/gitlab-workhorse/internal/sendfile"
"gitlab.com/gitlab-org/gitlab-workhorse/internal/sendurl"
"gitlab.com/gitlab-org/gitlab-workhorse/internal/staticpages"
"gitlab.com/gitlab-org/gitlab-workhorse/internal/upload"
)
type matcherFunc func(*http.Request) bool
type routeEntry struct {
method string
regex *regexp.Regexp
handler http.Handler
matchers []matcherFunc
}
type routeOptions struct {
tracing bool
matchers []matcherFunc
}
const (
apiPattern = `^/api/`
ciAPIPattern = `^/ci/api/`
gitProjectPattern = `^/([^/]+/){1,}[^/]+\.git/`
projectPattern = `^/([^/]+/){1,}[^/]+/`
snippetUploadPattern = `^/uploads/personal_snippet`
userUploadPattern = `^/uploads/user`
)
func compileRegexp(regexpStr string) *regexp.Regexp {
if len(regexpStr) == 0 {
return nil
}
return regexp.MustCompile(regexpStr)
}
func withMatcher(f matcherFunc) func(*routeOptions) {
return func(options *routeOptions) {
options.matchers = append(options.matchers, f)
}
}
func withoutTracing() func(*routeOptions) {
return func(options *routeOptions) {
options.tracing = false
}
}
func route(method, regexpStr string, handler http.Handler, opts ...func(*routeOptions)) routeEntry {
// Instantiate a route with the defaults
options := routeOptions{
tracing: true,
}
for _, f := range opts {
f(&options)
}
handler = denyWebsocket(handler) // Disallow websockets
handler = instrumentRoute(handler, method, regexpStr) // Add prometheus metrics
if options.tracing {
// Add distributed tracing
handler = tracing.Handler(handler)
}
return routeEntry{
method: method,
regex: compileRegexp(regexpStr),
handler: handler,
matchers: options.matchers,
}
}
func wsRoute(regexpStr string, handler http.Handler, matchers ...matcherFunc) routeEntry {
return routeEntry{
method: "GET",
regex: compileRegexp(regexpStr),
handler: instrumentRoute(handler, "GET", regexpStr),
matchers: append(matchers, websocket.IsWebSocketUpgrade),
}
}
// Creates matcherFuncs for a particular content type.
func isContentType(contentType string) func(*http.Request) bool {
return func(r *http.Request) bool {
return helper.IsContentType(contentType, r.Header.Get("Content-Type"))
}
}
func (ro *routeEntry) isMatch(cleanedPath string, req *http.Request) bool {
if ro.method != "" && req.Method != ro.method {
return false
}
if ro.regex != nil && !ro.regex.MatchString(cleanedPath) {
return false
}
ok := true
for _, matcher := range ro.matchers {
ok = matcher(req)
if !ok {
break
}
}
return ok
}
func buildProxy(backend *url.URL, version string, rt http.RoundTripper) http.Handler {
proxier := proxypkg.NewProxy(backend, version, rt)
return senddata.SendData(
sendfile.SendFile(apipkg.Block(proxier)),
git.SendArchive,
git.SendBlob,
git.SendDiff,
git.SendPatch,
git.SendSnapshot,
artifacts.SendEntry,
sendurl.SendURL,
)
}
// Routing table
// We match against URI not containing the relativeUrlRoot:
// see upstream.ServeHTTP
func (u *upstream) configureRoutes() {
api := apipkg.NewAPI(
u.Backend,
u.Version,
u.RoundTripper,
)
static := &staticpages.Static{DocumentRoot: u.DocumentRoot}
proxy := buildProxy(u.Backend, u.Version, u.RoundTripper)
signingTripper := secret.NewRoundTripper(u.RoundTripper, u.Version)
signingProxy := buildProxy(u.Backend, u.Version, signingTripper)
uploadPath := path.Join(u.DocumentRoot, "uploads/tmp")
uploadAccelerateProxy := upload.Accelerate(&upload.SkipRailsAuthorizer{TempPath: uploadPath}, proxy)
ciAPIProxyQueue := queueing.QueueRequests("ci_api_job_requests", uploadAccelerateProxy, u.APILimit, u.APIQueueLimit, u.APIQueueTimeout)
ciAPILongPolling := builds.RegisterHandler(ciAPIProxyQueue, redis.WatchKey, u.APICILongPollingDuration)
// Serve static files or forward the requests
defaultUpstream := static.ServeExisting(
u.URLPrefix,
staticpages.CacheDisabled,
static.DeployPage(static.ErrorPagesUnless(u.DevelopmentMode, uploadAccelerateProxy)),
)
u.Routes = []routeEntry{
// Git Clone
route("GET", gitProjectPattern+`info/refs\z`, git.GetInfoRefsHandler(api)),
route("POST", gitProjectPattern+`git-upload-pack\z`, contentEncodingHandler(git.UploadPack(api)), withMatcher(isContentType("application/x-git-upload-pack-request"))),
route("POST", gitProjectPattern+`git-receive-pack\z`, contentEncodingHandler(git.ReceivePack(api)), withMatcher(isContentType("application/x-git-receive-pack-request"))),
route("PUT", gitProjectPattern+`gitlab-lfs/objects/([0-9a-f]{64})/([0-9]+)\z`, lfs.PutStore(api, signingProxy), withMatcher(isContentType("application/octet-stream"))),
// CI Artifacts
route("POST", apiPattern+`v4/jobs/[0-9]+/artifacts\z`, contentEncodingHandler(artifacts.UploadArtifacts(api, proxy))),
route("POST", ciAPIPattern+`v1/builds/[0-9]+/artifacts\z`, contentEncodingHandler(artifacts.UploadArtifacts(api, proxy))),
// Terminal websocket
wsRoute(projectPattern+`environments/[0-9]+/terminal.ws\z`, channel.Handler(api)),
wsRoute(projectPattern+`-/jobs/[0-9]+/terminal.ws\z`, channel.Handler(api)),
// Proxy Job Services
wsRoute(projectPattern+`-/jobs/[0-9]+/proxy.ws\z`, channel.Handler(api)),
// Long poll and limit capacity given to jobs/request and builds/register.json
route("", apiPattern+`v4/jobs/request\z`, ciAPILongPolling),
route("", ciAPIPattern+`v1/builds/register.json\z`, ciAPILongPolling),
// Maven Artifact Repository
route("PUT", apiPattern+`v4/projects/[0-9]+/packages/maven/`, filestore.BodyUploader(api, proxy, nil)),
// Explicitly proxy API requests
route("", apiPattern, proxy),
route("", ciAPIPattern, proxy),
// Serve assets
route(
"", `^/assets/`,
static.ServeExisting(
u.URLPrefix,
staticpages.CacheExpireMax,
NotFoundUnless(u.DevelopmentMode, proxy),
),
withoutTracing(), // Tracing on assets is very noisy
),
// Uploads
route("POST", projectPattern+`uploads\z`, upload.Accelerate(api, proxy)),
route("POST", snippetUploadPattern, upload.Accelerate(api, proxy)),
route("POST", userUploadPattern, upload.Accelerate(api, proxy)),
// For legacy reasons, user uploads are stored under the document root.
// To prevent anybody who knows/guesses the URL of a user-uploaded file
// from downloading it we make sure requests to /uploads/ do _not_ pass
// through static.ServeExisting.
route("", `^/uploads/`, static.ErrorPagesUnless(u.DevelopmentMode, proxy)),
// This route lets us filter out health checks from our metrics.
route("", "^/-/", defaultUpstream),
route("", "", defaultUpstream),
}
}
func denyWebsocket(next http.Handler) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
if websocket.IsWebSocketUpgrade(r) {
helper.HTTPError(w, r, "websocket upgrade not allowed", http.StatusBadRequest)
return
}
next.ServeHTTP(w, r)
})
}