[#XX] Support virtual-hosted-style access to container

Signed-off-by: Denis Kirillov <d.kirillov@yadro.com>

app.go

@@ -15,6 +15,7 @@ import (
 	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/metrics"
 	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/resolver"
 	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/response"
+	hostRouter "git.frostfs.info/TrueCloudLab/frostfs-http-gw/router"
 	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/uploader"
 	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/utils"
 	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/pool"
@@ -338,8 +339,11 @@ func (a *app) Serve(ctx context.Context) {
 	uploadRoutes := uploader.New(ctx, a.AppParams(), a.settings.Uploader)
 	downloadRoutes := downloader.New(ctx, a.AppParams(), a.settings.Downloader)
 
+	domains := a.cfg.GetStringSlice(cfgListenDomains)
+	a.log.Info("fetch domains, prepare to use API", zap.Strings("domains", domains))
+
 	// Configure router.
-	a.configureRouter(uploadRoutes, downloadRoutes)
+	a.configureRouter(domains, uploadRoutes, downloadRoutes)
 
 	a.startServices()
 	a.initServers(ctx)
@@ -436,7 +440,42 @@ func (a *app) stopServices() {
 	}
 }
 
-func (a *app) configureRouter(uploadRoutes *uploader.Uploader, downloadRoutes *downloader.Downloader) {
+func (a *app) configureRouter(domains []string, uploadRoutes *uploader.Uploader, downloadRoutes *downloader.Downloader) {
+	hr := hostRouter.NewHostBucketRouter("cid")
+	hr.Default(a.defaultRouter(uploadRoutes, downloadRoutes))
+
+	bucketRouter := a.bucketRouter(uploadRoutes, downloadRoutes)
+	for _, domain := range domains {
+		hr.Map(domain, bucketRouter)
+	}
+
+	a.webServer.Handler = hr.Handler
+}
+
+func (a *app) bucketRouter(uploadRoutes *uploader.Uploader, downloadRoutes *downloader.Downloader) *router.Router {
+	r := router.New()
+	r.RedirectTrailingSlash = true
+	r.NotFound = func(r *fasthttp.RequestCtx) {
+		response.Error(r, "Not found", fasthttp.StatusNotFound)
+	}
+	r.MethodNotAllowed = func(r *fasthttp.RequestCtx) {
+		response.Error(r, "Method Not Allowed", fasthttp.StatusMethodNotAllowed)
+	}
+	r.POST("/upload", a.logger(uploadRoutes.Upload))
+	a.log.Info("added path /upload")
+	r.GET("/get/{oid}", a.logger(downloadRoutes.DownloadByAddress))
+	r.HEAD("/get/{oid}", a.logger(downloadRoutes.HeadByAddress))
+	a.log.Info("added path /get/{oid}")
+	r.GET("/get_by_attribute/{attr_key}/{attr_val:*}", a.logger(downloadRoutes.DownloadByAttribute))
+	r.HEAD("/get_by_attribute/{attr_key}/{attr_val:*}", a.logger(downloadRoutes.HeadByAttribute))
+	a.log.Info("added path /get_by_attribute/{attr_key}/{attr_val:*}")
+	r.GET("/zip/{prefix:*}", a.logger(downloadRoutes.DownloadZipped))
+	a.log.Info("added path /zip/{prefix}")
+
+	return r
+}
+
+func (a *app) defaultRouter(uploadRoutes *uploader.Uploader, downloadRoutes *downloader.Downloader) *router.Router {
 	r := router.New()
 	r.RedirectTrailingSlash = true
 	r.NotFound = func(r *fasthttp.RequestCtx) {
@@ -456,7 +495,7 @@ func (a *app) configureRouter(uploadRoutes *uploader.Uploader, downloadRoutes *d
 	r.GET("/zip/{cid}/{prefix:*}", a.logger(downloadRoutes.DownloadZipped))
 	a.log.Info("added path /zip/{cid}/{prefix}")
 
-	a.webServer.Handler = r.Handler
+	return r
 }
 
 func (a *app) logger(h fasthttp.RequestHandler) fasthttp.RequestHandler {

config/config.env

@@ -17,6 +17,9 @@ HTTP_GW_PROMETHEUS_ADDRESS=localhost:8084
 # Log level.
 HTTP_GW_LOGGER_LEVEL=debug
 
+# Domains to be able to use virtual-hosted-style access to bucket/container.
+HTTP_GW_LISTEN_DOMAINS=httpdev.frostfs.devenv
+
 HTTP_GW_SERVER_0_ADDRESS=0.0.0.0:443
 HTTP_GW_SERVER_0_TLS_ENABLED=false
 HTTP_GW_SERVER_0_TLS_CERT_FILE=/path/to/tls/cert

config/config.yaml

@@ -13,6 +13,10 @@ prometheus:
 logger:
   level: debug # Log level.
 
+# Domains to be able to use virtual-hosted-style access to bucket/container.
+listen_domains:
+  - httpdev.frostfs.devenv
+
 server:
   - address: 0.0.0.0:8080
     tls:

docs/gate-configuration.md

@@ -57,6 +57,10 @@ $ cat http.log
 # General section
 
 ```yaml
+listen_domains:
+  - httpdev.frostfs.devenv
+  - httpdev2.frostfs.devenv
+
 rpc_endpoint: http://morph-chain.frostfs.devenv:30333
 resolve_order:
   - nns
@@ -70,7 +74,8 @@ pool_error_threshold: 100
 ```
 
 | Parameter              | Type       | SIGHUP reload | Default value | Description                                                                        |
-|------------------------|------------|---------------|----------------|------------------------------------------------------------------------------------|
+|------------------------|------------|---------------|---------------|------------------------------------------------------------------------------------|
+| `listen_domains`       | `[]string` |               |               | Domains to be able to use virtual-hosted-style access to bucket/container.         |
 | `rpc_endpoint`         | `string`   | yes           |               | The address of the RPC host to which the gateway connects to resolve bucket names. |
 | `resolve_order`        | `[]string` | yes           | `[nns, dns]`  | Order of bucket name resolvers to use.                                             |
 | `connect_timeout`      | `duration` |               | `10s`         | Timeout to connect to a node.                                                      |

router/router.go

@@ -0,0 +1,69 @@
+package router
+
+import (
+	"strings"
+
+	"github.com/fasthttp/router"
+	"github.com/valyala/fasthttp"
+)
+
+type HostBucketRouter struct {
+	routes        map[string]*router.Router
+	bktParam      string
+	defaultRouter *router.Router
+}
+
+func NewHostBucketRouter(bktParam string) HostBucketRouter {
+	return HostBucketRouter{
+		routes:   make(map[string]*router.Router),
+		bktParam: bktParam,
+	}
+}
+
+func (hr *HostBucketRouter) Default(router *router.Router) {
+	hr.defaultRouter = router
+}
+
+func (hr HostBucketRouter) Map(host string, h *router.Router) {
+	hr.routes[strings.ToLower(host)] = h
+}
+
+func (hr HostBucketRouter) Handler(ctx *fasthttp.RequestCtx) {
+	bucket, domain := getBucketDomain(getHost(ctx))
+	_ = bucket
+	domainRouter, ok := hr.routes[strings.ToLower(domain)]
+	if !ok {
+		domainRouter = hr.defaultRouter
+		if domainRouter == nil {
+			ctx.Error(fasthttp.StatusMessage(fasthttp.StatusNotFound), fasthttp.StatusNotFound)
+			return
+		}
+	}
+
+	if bucket != "" {
+		ctx.SetUserValue(hr.bktParam, bucket)
+	}
+
+	domainRouter.Handler(ctx)
+}
+
+func getBucketDomain(host string) (bucket string, domain string) {
+	parts := strings.Split(host, ".")
+	if len(parts) > 1 {
+		return parts[0], strings.Join(parts[1:], ".")
+	}
+	return "", host
+}
+
+// getHost tries its best to return the request host.
+// According to section 14.23 of RFC 2616 the Host header
+// can include the port number if the default value of 80 is not used.
+func getHost(r *fasthttp.RequestCtx) string {
+	host := string(r.Host())
+
+	if i := strings.Index(host, ":"); i != -1 {
+		host = host[:i]
+	}
+
+	return host
+}

settings.go

@@ -57,6 +57,9 @@ const (
 	// Logger.
 	cfgLoggerLevel = "logger.level"
 
+	// Domains for host based bucket/container access
+	cfgListenDomains = "listen_domains"
+
 	// Wallet.
 	cfgWalletPassphrase = "wallet.passphrase"
 	cfgWalletPath       = "wallet.path"