package main
import (
+ "errors"
"flag"
"fmt"
"git.curoverse.com/arvados.git/sdk/go/arvadosclient"
"net/http"
"os"
"os/signal"
+ "reflect"
+ "regexp"
"sync"
"syscall"
"time"
log.Fatalf("Could not listen on %v", listen)
}
- go RefreshServicesList(&kc)
+ go RefreshServicesList(kc)
// 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 with server list %v", listener.Addr(), kc.ServiceRoots())
+ log.Printf("Arvados Keep proxy started listening on %v", listener.Addr())
// Start listening for requests.
- http.Serve(listener, MakeRESTRouter(!no_get, !no_put, &kc))
+ http.Serve(listener, MakeRESTRouter(!no_get, !no_put, kc))
log.Println("shutting down")
}
// Refresh the keep service list every five minutes.
func RefreshServicesList(kc *keepclient.KeepClient) {
+ var previousRoots = []map[string]string{}
+ var delay time.Duration = 0
for {
- time.Sleep(300 * time.Second)
- oldservices := kc.ServiceRoots()
- kc.DiscoverKeepServers()
- newservices := kc.ServiceRoots()
- s1 := fmt.Sprint(oldservices)
- s2 := fmt.Sprint(newservices)
- if s1 != s2 {
- log.Printf("Updated server list to %v", s2)
+ time.Sleep(delay * time.Second)
+ delay = 300
+ if err := kc.DiscoverKeepServers(); err != nil {
+ log.Println("Error retrieving services list:", err)
+ delay = 3
+ continue
}
+ newRoots := []map[string]string{kc.LocalRoots(), kc.GatewayRoots()}
+ if !reflect.DeepEqual(previousRoots, newRoots) {
+ log.Printf("Updated services list: locals %v gateways %v", newRoots[0], newRoots[1])
+ }
+ if len(newRoots[0]) == 0 {
+ log.Print("WARNING: No local services. Retrying in 3 seconds.")
+ delay = 3
+ }
+ previousRoots = newRoots
}
}
*ApiTokenCache
}
+type IndexHandler struct {
+ *keepclient.KeepClient
+ *ApiTokenCache
+}
+
type InvalidPathHandler struct{}
type OptionsHandler struct{}
rest := mux.NewRouter()
if enable_get {
- rest.Handle(`/{hash:[0-9a-f]{32}}+{hints}`,
+ rest.Handle(`/{locator:[0-9a-f]{32}\+.*}`,
GetBlockHandler{kc, t}).Methods("GET", "HEAD")
- rest.Handle(`/{hash:[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 {
- rest.Handle(`/{hash:[0-9a-f]{32}}+{hints}`, PutBlockHandler{kc, t}).Methods("PUT")
- rest.Handle(`/{hash:[0-9a-f]{32}}`, PutBlockHandler{kc, t}).Methods("PUT")
+ rest.Handle(`/{locator:[0-9a-f]{32}\+.*}`, PutBlockHandler{kc, t}).Methods("PUT")
+ rest.Handle(`/{locator:[0-9a-f]{32}}`, PutBlockHandler{kc, t}).Methods("PUT")
rest.Handle(`/`, PutBlockHandler{kc, t}).Methods("POST")
rest.Handle(`/{any}`, OptionsHandler{}).Methods("OPTIONS")
rest.Handle(`/`, OptionsHandler{}).Methods("OPTIONS")
SetCorsHeaders(resp)
}
-func (this GetBlockHandler) ServeHTTP(resp http.ResponseWriter, req *http.Request) {
- SetCorsHeaders(resp)
+var BadAuthorizationHeader = errors.New("Missing or invalid Authorization header")
+var ContentLengthMismatch = errors.New("Actual length != expected content length")
+var MethodNotSupported = errors.New("Method not supported")
- kc := *this.KeepClient
+var removeHint, _ = regexp.Compile("\\+K@[a-z0-9]{5}(\\+|$)")
- hash := mux.Vars(req)["hash"]
- hints := mux.Vars(req)["hints"]
+func (this GetBlockHandler) ServeHTTP(resp http.ResponseWriter, req *http.Request) {
+ SetCorsHeaders(resp)
- locator := keepclient.MakeLocator2(hash, hints)
+ locator := mux.Vars(req)["locator"]
+ var err error
+ var status int
+ var expectLength, responseLength int64
+ var proxiedURI = "-"
+
+ defer func() {
+ log.Println(GetRemoteAddress(req), req.Method, req.URL.Path, status, expectLength, responseLength, proxiedURI, err)
+ if status != http.StatusOK {
+ http.Error(resp, err.Error(), status)
+ }
+ }()
- log.Printf("%s: %s %s begin", GetRemoteAddress(req), req.Method, hash)
+ kc := *this.KeepClient
var pass bool
var tok string
if pass, tok = CheckAuthorizationHeader(kc, this.ApiTokenCache, req); !pass {
- http.Error(resp, "Missing or invalid Authorization header", http.StatusForbidden)
+ status, err = http.StatusForbidden, BadAuthorizationHeader
return
}
kc.Arvados = &arvclient
var reader io.ReadCloser
- var err error
- var blocklen int64
- if req.Method == "GET" {
- reader, blocklen, _, err = kc.AuthorizedGet(hash, locator.Signature, locator.Timestamp)
- defer reader.Close()
- } else if req.Method == "HEAD" {
- blocklen, _, err = kc.AuthorizedAsk(hash, locator.Signature, locator.Timestamp)
+ locator = removeHint.ReplaceAllString(locator, "$1")
+
+ switch req.Method {
+ case "HEAD":
+ expectLength, proxiedURI, err = kc.Ask(locator)
+ case "GET":
+ reader, expectLength, proxiedURI, err = kc.Get(locator)
+ if reader != nil {
+ defer reader.Close()
+ }
+ default:
+ status, err = http.StatusNotImplemented, MethodNotSupported
+ return
}
- if blocklen > -1 {
- resp.Header().Set("Content-Length", fmt.Sprint(blocklen))
- } else {
- log.Printf("%s: %s %s Keep server did not return Content-Length",
- GetRemoteAddress(req), req.Method, hash)
+ if expectLength == -1 {
+ log.Println("Warning:", GetRemoteAddress(req), req.Method, proxiedURI, "Content-Length not provided")
}
- var status = 0
- switch err {
+ switch respErr := err.(type) {
case nil:
status = http.StatusOK
- if reader != nil {
- n, err2 := io.Copy(resp, reader)
- if blocklen > -1 && n != blocklen {
- log.Printf("%s: %s %s %v %v mismatched copy size expected Content-Length: %v",
- GetRemoteAddress(req), req.Method, hash, status, n, blocklen)
- } else if err2 == nil {
- log.Printf("%s: %s %s %v %v",
- GetRemoteAddress(req), req.Method, hash, status, n)
- } else {
- log.Printf("%s: %s %s %v %v copy error: %v",
- GetRemoteAddress(req), req.Method, hash, status, n, err2.Error())
+ resp.Header().Set("Content-Length", fmt.Sprint(expectLength))
+ switch req.Method {
+ case "HEAD":
+ responseLength = 0
+ case "GET":
+ responseLength, err = io.Copy(resp, reader)
+ if err == nil && expectLength > -1 && responseLength != expectLength {
+ err = ContentLengthMismatch
}
+ }
+ case keepclient.Error:
+ if respErr.Error() == "Block not found" {
+ status = http.StatusNotFound
+ } else if respErr.Temporary() {
+ status = http.StatusBadGateway
} else {
- log.Printf("%s: %s %s %v 0", GetRemoteAddress(req), req.Method, hash, status)
+ status = 422
}
- case keepclient.BlockNotFound:
- status = http.StatusNotFound
- http.Error(resp, "Not found", http.StatusNotFound)
default:
- status = http.StatusBadGateway
- http.Error(resp, err.Error(), http.StatusBadGateway)
- }
-
- if err != nil {
- log.Printf("%s: %s %s %v error: %v",
- GetRemoteAddress(req), req.Method, hash, status, err.Error())
+ status = http.StatusInternalServerError
}
}
+var LengthRequiredError = errors.New(http.StatusText(http.StatusLengthRequired))
+var LengthMismatchError = errors.New("Locator size hint does not match Content-Length header")
+
func (this PutBlockHandler) ServeHTTP(resp http.ResponseWriter, req *http.Request) {
SetCorsHeaders(resp)
kc := *this.KeepClient
+ var err error
+ var expectLength int64 = -1
+ var status = http.StatusInternalServerError
+ var wroteReplicas int
+ var locatorOut string = "-"
+
+ defer func() {
+ log.Println(GetRemoteAddress(req), req.Method, req.URL.Path, status, expectLength, kc.Want_replicas, wroteReplicas, locatorOut, err)
+ if status != http.StatusOK {
+ http.Error(resp, err.Error(), status)
+ }
+ }()
- hash := mux.Vars(req)["hash"]
- hints := mux.Vars(req)["hints"]
-
- locator := keepclient.MakeLocator2(hash, hints)
+ locatorIn := mux.Vars(req)["locator"]
- var contentLength int64 = -1
if req.Header.Get("Content-Length") != "" {
- _, err := fmt.Sscanf(req.Header.Get("Content-Length"), "%d", &contentLength)
+ _, err := fmt.Sscanf(req.Header.Get("Content-Length"), "%d", &expectLength)
if err != nil {
- resp.Header().Set("Content-Length", fmt.Sprintf("%d", contentLength))
+ resp.Header().Set("Content-Length", fmt.Sprintf("%d", expectLength))
}
}
- log.Printf("%s: %s %s Content-Length %v", GetRemoteAddress(req), req.Method, hash, contentLength)
-
- if contentLength < 0 {
- http.Error(resp, "Must include Content-Length header", http.StatusLengthRequired)
+ if expectLength < 0 {
+ err = LengthRequiredError
+ status = http.StatusLengthRequired
return
}
- if locator.Size > 0 && int64(locator.Size) != contentLength {
- http.Error(resp, "Locator size hint does not match Content-Length header", 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 {
- http.Error(resp, "Missing or invalid Authorization header", http.StatusForbidden)
+ err = BadAuthorizationHeader
+ status = http.StatusForbidden
return
}
}
// Now try to put the block through
- var replicas int
- var put_err error
- if hash == "" {
+ if locatorIn == "" {
if bytes, err := ioutil.ReadAll(req.Body); err != nil {
- msg := fmt.Sprintf("Error reading request body: %s", err)
- log.Printf(msg)
- http.Error(resp, msg, http.StatusInternalServerError)
+ err = errors.New(fmt.Sprintf("Error reading request body: %s", err))
+ status = http.StatusInternalServerError
return
} else {
- hash, replicas, put_err = kc.PutB(bytes)
+ locatorOut, wroteReplicas, err = kc.PutB(bytes)
}
} else {
- hash, replicas, put_err = kc.PutHR(hash, req.Body, contentLength)
+ locatorOut, wroteReplicas, err = kc.PutHR(locatorIn, req.Body, expectLength)
}
// Tell the client how many successful PUTs we accomplished
- resp.Header().Set(keepclient.X_Keep_Replicas_Stored, fmt.Sprintf("%d", replicas))
+ resp.Header().Set(keepclient.X_Keep_Replicas_Stored, fmt.Sprintf("%d", wroteReplicas))
- switch put_err {
+ switch err {
case nil:
- // Default will return http.StatusOK
- log.Printf("%s: %s %s finished, stored %v replicas (desired %v)", GetRemoteAddress(req), req.Method, hash, replicas, kc.Want_replicas)
- n, err2 := io.WriteString(resp, hash)
- if err2 != nil {
- log.Printf("%s: wrote %v bytes to response body and got error %v", n, err2.Error())
- }
+ status = http.StatusOK
+ _, err = io.WriteString(resp, locatorOut)
case keepclient.OversizeBlockError:
// Too much data
- http.Error(resp, fmt.Sprintf("Exceeded maximum blocksize %d", keepclient.BLOCKSIZE), http.StatusRequestEntityTooLarge)
+ status = http.StatusRequestEntityTooLarge
case keepclient.InsufficientReplicasError:
- if replicas > 0 {
+ if wroteReplicas > 0 {
// At least one write is considered success. The
// client can decide if getting less than the number of
// replications it asked for is a fatal error.
- // Default will return http.StatusOK
- n, err2 := io.WriteString(resp, hash)
- if err2 != nil {
- log.Printf("%s: wrote %v bytes to response body and got error %v", n, err2.Error())
- }
+ status = http.StatusOK
+ _, err = io.WriteString(resp, locatorOut)
} else {
- http.Error(resp, put_err.Error(), http.StatusServiceUnavailable)
+ status = http.StatusServiceUnavailable
}
default:
- http.Error(resp, put_err.Error(), http.StatusBadGateway)
+ 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
}
- if put_err != nil {
- log.Printf("%s: %s %s stored %v replicas (desired %v) got error %v", GetRemoteAddress(req), req.Method, hash, replicas, kc.Want_replicas, put_err.Error())
+ // 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