"net/http"
"os"
"os/signal"
+ "regexp"
"sync"
"syscall"
"time"
)
// Default TCP address on which to listen for requests.
-// Initialized by the -listen flag.
-const DEFAULT_ADDR = ":25107"
+// Override with -listen.
+const DefaultAddr = ":25107"
var listener net.Listener
pidfile string
)
- flagset := flag.NewFlagSet("default", flag.ExitOnError)
+ flagset := flag.NewFlagSet("keepproxy", flag.ExitOnError)
flagset.StringVar(
&listen,
"listen",
- DEFAULT_ADDR,
+ DefaultAddr,
"Interface on which to listen for requests, in the format "+
"ipaddr:port. e.g. -listen=10.0.1.24:8000. Use -listen=:port "+
"to listen on all network interfaces.")
log.Fatalf("Error setting up arvados client %s", err.Error())
}
+ if os.Getenv("ARVADOS_DEBUG") != "" {
+ keepclient.DebugPrintf = log.Printf
+ }
kc, err := keepclient.MakeKeepClient(&arv)
if err != nil {
log.Fatalf("Error setting up keep client %s", err.Error())
}
kc.Want_replicas = default_replicas
-
kc.Client.Timeout = time.Duration(timeout) * time.Second
+ go kc.RefreshServices(5*time.Minute, 3*time.Second)
listener, err = net.Listen("tcp", listen)
if err != nil {
log.Fatalf("Could not listen on %v", listen)
}
-
- go RefreshServicesList(kc)
+ log.Printf("Arvados Keep proxy started listening on %v", listener.Addr())
// Shut down the server gracefully (by closing the listener)
// if SIGTERM is received.
signal.Notify(term, syscall.SIGTERM)
signal.Notify(term, syscall.SIGINT)
- log.Printf("Arvados Keep proxy started listening on %v", listener.Addr())
-
- // Start listening for requests.
+ // Start serving requests.
http.Serve(listener, MakeRESTRouter(!no_get, !no_put, kc))
log.Println("shutting down")
expireTime int64
}
-// Refresh the keep service list every five minutes.
-func RefreshServicesList(kc *keepclient.KeepClient) {
- previousRoots := ""
- for {
- if err := kc.DiscoverKeepServers(); err != nil {
- log.Println("Error retrieving services list:", err)
- time.Sleep(3*time.Second)
- previousRoots = ""
- } else if len(kc.LocalRoots()) == 0 {
- log.Println("Received empty services list")
- time.Sleep(3*time.Second)
- previousRoots = ""
- } else {
- newRoots := fmt.Sprint("Locals ", kc.LocalRoots(), ", gateways ", kc.GatewayRoots())
- if newRoots != previousRoots {
- log.Println("Updated services list:", newRoots)
- previousRoots = newRoots
- }
- time.Sleep(300*time.Second)
- }
- }
-}
-
// Cache the token and set an expire time. If we already have an expire time
// on the token, it is not updated.
func (this *ApiTokenCache) RememberToken(token string) {
}
func GetRemoteAddress(req *http.Request) string {
- if realip := req.Header.Get("X-Real-IP"); realip != "" {
- if forwarded := req.Header.Get("X-Forwarded-For"); forwarded != realip {
- return fmt.Sprintf("%s (X-Forwarded-For %s)", realip, forwarded)
- } else {
- return realip
- }
+ if xff := req.Header.Get("X-Forwarded-For"); xff != "" {
+ return xff + "," + req.RemoteAddr
}
return req.RemoteAddr
}
-func CheckAuthorizationHeader(kc keepclient.KeepClient, cache *ApiTokenCache, req *http.Request) (pass bool, tok string) {
+func CheckAuthorizationHeader(kc *keepclient.KeepClient, cache *ApiTokenCache, req *http.Request) (pass bool, tok string) {
var auth string
if auth = req.Header.Get("Authorization"); auth == "" {
return false, ""
}
if cache.RecallToken(tok) {
- // Valid in the cache, short circut
+ // Valid in the cache, short circuit
return true, tok
}
*ApiTokenCache
}
+type IndexHandler struct {
+ *keepclient.KeepClient
+ *ApiTokenCache
+}
+
type InvalidPathHandler struct{}
type OptionsHandler struct{}
rest.Handle(`/{locator:[0-9a-f]{32}\+.*}`,
GetBlockHandler{kc, t}).Methods("GET", "HEAD")
rest.Handle(`/{locator:[0-9a-f]{32}}`, GetBlockHandler{kc, t}).Methods("GET", "HEAD")
+
+ // List all blocks
+ rest.Handle(`/index`, IndexHandler{kc, t}).Methods("GET")
+
+ // List blocks whose hash has the given prefix
+ rest.Handle(`/index/{prefix:[0-9a-f]{0,32}}`, IndexHandler{kc, t}).Methods("GET")
}
if enable_put {
var ContentLengthMismatch = errors.New("Actual length != expected content length")
var MethodNotSupported = errors.New("Method not supported")
+var removeHint, _ = regexp.Compile("\\+K@[a-z0-9]{5}(\\+|$)")
+
func (this GetBlockHandler) ServeHTTP(resp http.ResponseWriter, req *http.Request) {
SetCorsHeaders(resp)
var pass bool
var tok string
- if pass, tok = CheckAuthorizationHeader(kc, this.ApiTokenCache, req); !pass {
+ if pass, tok = CheckAuthorizationHeader(&kc, this.ApiTokenCache, req); !pass {
status, err = http.StatusForbidden, BadAuthorizationHeader
return
}
var reader io.ReadCloser
+ locator = removeHint.ReplaceAllString(locator, "$1")
+
switch req.Method {
case "HEAD":
expectLength, proxiedURI, err = kc.Ask(locator)
log.Println("Warning:", GetRemoteAddress(req), req.Method, proxiedURI, "Content-Length not provided")
}
- switch err {
+ switch respErr := err.(type) {
case nil:
status = http.StatusOK
resp.Header().Set("Content-Length", fmt.Sprint(expectLength))
err = ContentLengthMismatch
}
}
- case keepclient.BlockNotFound:
- status = http.StatusNotFound
+ case keepclient.Error:
+ if respErr == keepclient.BlockNotFound {
+ status = http.StatusNotFound
+ } else if respErr.Temporary() {
+ status = http.StatusBadGateway
+ } else {
+ status = 422
+ }
default:
- status = http.StatusBadGateway
+ status = http.StatusInternalServerError
}
}
return
}
- if loc := keepclient.MakeLocator(locatorIn); loc.Size > 0 && int64(loc.Size) != expectLength {
- err = LengthMismatchError
- status = http.StatusBadRequest
- return
+ if locatorIn != "" {
+ var loc *keepclient.Locator
+ if loc, err = keepclient.MakeLocator(locatorIn); err != nil {
+ status = http.StatusBadRequest
+ return
+ } else if loc.Size > 0 && int64(loc.Size) != expectLength {
+ err = LengthMismatchError
+ status = http.StatusBadRequest
+ return
+ }
}
var pass bool
var tok string
- if pass, tok = CheckAuthorizationHeader(kc, this.ApiTokenCache, req); !pass {
+ if pass, tok = CheckAuthorizationHeader(&kc, this.ApiTokenCache, req); !pass {
err = BadAuthorizationHeader
status = http.StatusForbidden
return
status = http.StatusBadGateway
}
}
+
+// ServeHTTP implementation for IndexHandler
+// Supports only GET requests for /index/{prefix:[0-9a-f]{0,32}}
+// For each keep server found in LocalRoots:
+// Invokes GetIndex using keepclient
+// Expects "complete" response (terminating with blank new line)
+// Aborts on any errors
+// Concatenates responses from all those keep servers and returns
+func (handler IndexHandler) ServeHTTP(resp http.ResponseWriter, req *http.Request) {
+ SetCorsHeaders(resp)
+
+ prefix := mux.Vars(req)["prefix"]
+ var err error
+ var status int
+
+ defer func() {
+ if status != http.StatusOK {
+ http.Error(resp, err.Error(), status)
+ }
+ }()
+
+ kc := *handler.KeepClient
+
+ ok, token := CheckAuthorizationHeader(&kc, handler.ApiTokenCache, req)
+ if !ok {
+ status, err = http.StatusForbidden, BadAuthorizationHeader
+ return
+ }
+
+ // Copy ArvadosClient struct and use the client's API token
+ arvclient := *kc.Arvados
+ arvclient.ApiToken = token
+ kc.Arvados = &arvclient
+
+ // Only GET method is supported
+ if req.Method != "GET" {
+ status, err = http.StatusNotImplemented, MethodNotSupported
+ return
+ }
+
+ // Get index from all LocalRoots and write to resp
+ var reader io.Reader
+ for uuid := range kc.LocalRoots() {
+ reader, err = kc.GetIndex(uuid, prefix)
+ if err != nil {
+ status = http.StatusBadGateway
+ return
+ }
+
+ _, err = io.Copy(resp, reader)
+ if err != nil {
+ status = http.StatusBadGateway
+ return
+ }
+ }
+
+ // Got index from all the keep servers and wrote to resp
+ status = http.StatusOK
+ resp.Write([]byte("\n"))
+}
projects / arvados.git / blobdiff