"regexp"
"runtime"
"strconv"
- "strings"
- "syscall"
+ "sync"
"time"
)
}
func GetBlockHandler(resp http.ResponseWriter, req *http.Request) {
- hash := mux.Vars(req)["hash"]
-
- hints := mux.Vars(req)["hints"]
-
- // Parse the locator string and hints from the request.
- // TODO(twp): implement a Locator type.
- var signature, timestamp string
- if hints != "" {
- signature_pat, _ := regexp.Compile("^A([[:xdigit:]]+)@([[:xdigit:]]{8})$")
- for _, hint := range strings.Split(hints, "+") {
- if match, _ := regexp.MatchString("^[[:digit:]]+$", hint); match {
- // Server ignores size hints
- } else if m := signature_pat.FindStringSubmatch(hint); m != nil {
- signature = m[1]
- timestamp = m[2]
- } else if match, _ := regexp.MatchString("^[[:upper:]]", hint); match {
- // Any unknown hint that starts with an uppercase letter is
- // presumed to be valid and ignored, to permit forward compatibility.
- } else {
- // Unknown format; not a valid locator.
- http.Error(resp, BadRequestError.Error(), BadRequestError.HTTPCode)
- return
- }
- }
- }
-
- // If permission checking is in effect, verify this
- // request's permission signature.
if enforce_permissions {
- if signature == "" || timestamp == "" {
- http.Error(resp, PermissionError.Error(), PermissionError.HTTPCode)
- return
- } else if IsExpired(timestamp) {
- http.Error(resp, ExpiredError.Error(), ExpiredError.HTTPCode)
+ locator := req.URL.Path[1:] // strip leading slash
+ if err := VerifySignature(locator, GetApiToken(req)); err != nil {
+ http.Error(resp, err.Error(), err.(*KeepError).HTTPCode)
return
- } else {
- req_locator := req.URL.Path[1:] // strip leading slash
- if !VerifySignature(req_locator, GetApiToken(req)) {
- http.Error(resp, PermissionError.Error(), PermissionError.HTTPCode)
- return
- }
}
}
- block, err := GetBlock(hash, false)
+ block, err := GetBlock(mux.Vars(req)["hash"], false)
if err != nil {
// This type assertion is safe because the only errors
// GetBlock can return are DiskHashError or NotFoundError.
return
}
}
+ // An empty line at EOF is the only way the client can be
+ // assured the entire index was received.
+ resp.Write([]byte{'\n'})
}
// StatusHandler
BytesUsed uint64 `json:"bytes_used"`
}
+type PoolStatus struct {
+ Alloc uint64 `json:"BytesAllocated"`
+ Cap int `json:"BuffersMax"`
+ Len int `json:"BuffersInUse"`
+}
+
type NodeStatus struct {
- Volumes []*VolumeStatus `json:"volumes"`
+ Volumes []*VolumeStatus `json:"volumes"`
+ BufferPool PoolStatus
+ Memory runtime.MemStats
}
+var st NodeStatus
+var stLock sync.Mutex
func StatusHandler(resp http.ResponseWriter, req *http.Request) {
- st := GetNodeStatus()
- if jstat, err := json.Marshal(st); err == nil {
+ stLock.Lock()
+ ReadNodeStatus(&st)
+ jstat, err := json.Marshal(&st)
+ stLock.Unlock()
+ if err == nil {
resp.Write(jstat)
} else {
log.Printf("json.Marshal: %s\n", err)
- log.Printf("NodeStatus = %v\n", st)
+ log.Printf("NodeStatus = %v\n", &st)
http.Error(resp, err.Error(), 500)
}
}
-// GetNodeStatus
-// Returns a NodeStatus struct describing this Keep
-// node's current status.
+// ReadNodeStatus populates the given NodeStatus struct with current
+// values.
//
-func GetNodeStatus() *NodeStatus {
- st := new(NodeStatus)
-
- st.Volumes = make([]*VolumeStatus, len(KeepVM.AllReadable()))
- for i, vol := range KeepVM.AllReadable() {
- st.Volumes[i] = vol.Status()
+func ReadNodeStatus(st *NodeStatus) {
+ vols := KeepVM.AllReadable()
+ if cap(st.Volumes) < len(vols) {
+ st.Volumes = make([]*VolumeStatus, len(vols))
}
- return st
-}
-
-// GetVolumeStatus
-// Returns a VolumeStatus describing the requested volume.
-//
-func GetVolumeStatus(volume string) *VolumeStatus {
- var fs syscall.Statfs_t
- var devnum uint64
-
- if fi, err := os.Stat(volume); err == nil {
- devnum = fi.Sys().(*syscall.Stat_t).Dev
- } else {
- log.Printf("GetVolumeStatus: os.Stat: %s\n", err)
- return nil
+ st.Volumes = st.Volumes[:0]
+ for _, vol := range vols {
+ if s := vol.Status(); s != nil {
+ st.Volumes = append(st.Volumes, s)
+ }
}
-
- err := syscall.Statfs(volume, &fs)
- if err != nil {
- log.Printf("GetVolumeStatus: statfs: %s\n", err)
- return nil
- }
- // These calculations match the way df calculates disk usage:
- // "free" space is measured by fs.Bavail, but "used" space
- // uses fs.Blocks - fs.Bfree.
- free := fs.Bavail * uint64(fs.Bsize)
- used := (fs.Blocks - fs.Bfree) * uint64(fs.Bsize)
- return &VolumeStatus{volume, devnum, free, used}
+ st.BufferPool.Alloc = bufs.Alloc()
+ st.BufferPool.Cap = bufs.Cap()
+ st.BufferPool.Len = bufs.Len()
+ runtime.ReadMemStats(&st.Memory)
}
// DeleteHandler processes DELETE requests.
}
}
+var validLocatorRe = regexp.MustCompile(`^[0-9a-f]{32}$`)
+
// IsValidLocator
// Return true if the specified string is a valid Keep locator.
// When Keep is extended to support hash types other than MD5,
// this should be updated to cover those as well.
//
func IsValidLocator(loc string) bool {
- match, err := regexp.MatchString(`^[0-9a-f]{32}$`, loc)
- if err == nil {
- return match
- }
- log.Printf("IsValidLocator: %s\n", err)
- return false
+ return validLocatorRe.MatchString(loc)
}
+var authRe = regexp.MustCompile(`^OAuth2\s+(.*)`)
+
// GetApiToken returns the OAuth2 token from the Authorization
// header of a HTTP request, or an empty string if no matching
// token is found.
func GetApiToken(req *http.Request) string {
if auth, ok := req.Header["Authorization"]; ok {
- if pat, err := regexp.Compile(`^OAuth2\s+(.*)`); err != nil {
- log.Println(err)
- } else if match := pat.FindStringSubmatch(auth[0]); match != nil {
+ if match := authRe.FindStringSubmatch(auth[0]); match != nil {
return match[1]
}
}
projects / arvados.git / blobdiff