11644: Unify block-index handlers. Move prefix arg to query string.

[arvados.git] / services / keepstore / handlers.go

diff --git a/services/keepstore/handlers.go b/services/keepstore/handlers.go
index 33561426f912d08448d7297a192efe4d3b12cff0..bd88acb5a914a67d79bf7b423952bf175ec267bd 100644 (file)
--- a/services/keepstore/handlers.go
+++ b/services/keepstore/handlers.go
@@ -49,10 +49,10 @@ func MakeRESTRouter() *router {
        rest.HandleFunc(`/{hash:[0-9a-f]{32}}`, PutBlockHandler).Methods("PUT")
        rest.HandleFunc(`/{hash:[0-9a-f]{32}}`, DeleteHandler).Methods("DELETE")
        // List all blocks stored here. Privileged client only.
-       rest.HandleFunc(`/index`, IndexHandler).Methods("GET", "HEAD")
+       rest.HandleFunc(`/index`, rtr.IndexHandler).Methods("GET", "HEAD")
        // List blocks stored here whose hash has the given prefix.
        // Privileged client only.
-       rest.HandleFunc(`/index/{prefix:[0-9a-f]{0,32}}`, IndexHandler).Methods("GET", "HEAD")
+       rest.HandleFunc(`/index/{prefix:[0-9a-f]{0,32}}`, rtr.IndexHandler).Methods("GET", "HEAD")
 
        // Internals/debugging info (runtime.MemStats)
        rest.HandleFunc(`/debug.json`, rtr.DebugHandler).Methods("GET", "HEAD")
@@ -61,9 +61,9 @@ func MakeRESTRouter() *router {
        rest.HandleFunc(`/status.json`, rtr.StatusHandler).Methods("GET", "HEAD")
 
        // List mounts: UUID, readonly, tier, device ID, ...
-       rest.HandleFunc(`/mounts`, rtr.Mounts).Methods("GET")
-       rest.HandleFunc(`/mounts/{uuid}/blocks`, rtr.MountBlocks).Methods("GET")
-       rest.HandleFunc(`/mounts/{uuid}/blocks/{prefix:[0-9a-f]{0,32}}`, rtr.MountBlocks).Methods("GET")
+       rest.HandleFunc(`/mounts`, rtr.MountsHandler).Methods("GET")
+       rest.HandleFunc(`/mounts/{uuid}/blocks`, rtr.IndexHandler).Methods("GET")
+       rest.HandleFunc(`/mounts/{uuid}/blocks/`, rtr.IndexHandler).Methods("GET")
 
        // Replace the current pull queue.
        rest.HandleFunc(`/pull`, PullHandler).Methods("PUT")
@@ -228,18 +228,34 @@ func PutBlockHandler(resp http.ResponseWriter, req *http.Request) {
        resp.Write([]byte(returnHash + "\n"))
 }
 
-// IndexHandler is a HandleFunc to address /index and /index/{prefix} requests.
-func IndexHandler(resp http.ResponseWriter, req *http.Request) {
-       // Reject unauthorized requests.
+// IndexHandler responds to "/index", "/index/{prefix}", and
+// "/mounts/{uuid}/blocks" requests.
+func (rtr *router) IndexHandler(resp http.ResponseWriter, req *http.Request) {
        if !IsSystemAuth(GetAPIToken(req)) {
                http.Error(resp, UnauthorizedError.Error(), UnauthorizedError.HTTPCode)
                return
        }
 
        prefix := mux.Vars(req)["prefix"]
+       if prefix == "" {
+               req.ParseForm()
+               prefix = req.Form.Get("prefix")
+       }
 
-       for _, vol := range KeepVM.AllReadable() {
-               if err := vol.IndexTo(prefix, resp); err != nil {
+       uuid := mux.Vars(req)["uuid"]
+
+       var vols []Volume
+       if uuid == "" {
+               vols = KeepVM.AllReadable()
+       } else if v := KeepVM.Lookup(uuid, false); v == nil {
+               http.Error(resp, "mount not found", http.StatusNotFound)
+               return
+       } else {
+               vols = []Volume{v}
+       }
+
+       for _, v := range vols {
+               if err := v.IndexTo(prefix, resp); err != nil {
                        // The only errors returned by IndexTo are
                        // write errors returned by resp.Write(),
                        // which probably means the client has
@@ -255,32 +271,14 @@ func IndexHandler(resp http.ResponseWriter, req *http.Request) {
        resp.Write([]byte{'\n'})
 }
 
-// Mounts responds to "GET /mounts" requests.
-func (rtr *router) Mounts(resp http.ResponseWriter, req *http.Request) {
+// MountsHandler responds to "GET /mounts" requests.
+func (rtr *router) MountsHandler(resp http.ResponseWriter, req *http.Request) {
        err := json.NewEncoder(resp).Encode(KeepVM.Mounts())
        if err != nil {
                http.Error(resp, err.Error(), http.StatusInternalServerError)
        }
 }
 
-// MountBlocks responds to "GET /mounts/{uuid}/blocks" requests.
-func (rtr *router) MountBlocks(resp http.ResponseWriter, req *http.Request) {
-       if !IsSystemAuth(GetAPIToken(req)) {
-               http.Error(resp, UnauthorizedError.Error(), UnauthorizedError.HTTPCode)
-               return
-       }
-
-       uuid := mux.Vars(req)["uuid"]
-       prefix := mux.Vars(req)["prefix"]
-       if v := KeepVM.Lookup(uuid, false); v == nil {
-               http.Error(resp, "mount not found", http.StatusNotFound)
-       } else if err := v.IndexTo(prefix, resp); err != nil {
-               http.Error(resp, err.Error(), http.StatusInternalServerError)
-       } else {
-               resp.Write([]byte{'\n'})
-       }
-}
-
 // PoolStatus struct
 type PoolStatus struct {
        Alloc uint64 `json:"BytesAllocated"`