git subrepo clone (merge) https://github.com/kubernetes-incubator/metrics-server.git metrics-server
subrepo:
subdir: "metrics-server"
merged: "92d8412"
upstream:
origin: "https://github.com/kubernetes-incubator/metrics-server.git"
branch: "master"
commit: "92d8412"
git-subrepo:
version: "0.4.0"
origin: "???"
commit: "???"
diff --git a/metrics-server/vendor/github.com/emicklei/go-restful/curly.go b/metrics-server/vendor/github.com/emicklei/go-restful/curly.go
new file mode 100644
index 0000000..79f1f5a
--- /dev/null
+++ b/metrics-server/vendor/github.com/emicklei/go-restful/curly.go
@@ -0,0 +1,164 @@
+package restful
+
+// Copyright 2013 Ernest Micklei. All rights reserved.
+// Use of this source code is governed by a license
+// that can be found in the LICENSE file.
+
+import (
+ "net/http"
+ "regexp"
+ "sort"
+ "strings"
+)
+
+// CurlyRouter expects Routes with paths that contain zero or more parameters in curly brackets.
+type CurlyRouter struct{}
+
+// SelectRoute is part of the Router interface and returns the best match
+// for the WebService and its Route for the given Request.
+func (c CurlyRouter) SelectRoute(
+ webServices []*WebService,
+ httpRequest *http.Request) (selectedService *WebService, selected *Route, err error) {
+
+ requestTokens := tokenizePath(httpRequest.URL.Path)
+
+ detectedService := c.detectWebService(requestTokens, webServices)
+ if detectedService == nil {
+ if trace {
+ traceLogger.Printf("no WebService was found to match URL path:%s\n", httpRequest.URL.Path)
+ }
+ return nil, nil, NewError(http.StatusNotFound, "404: Page Not Found")
+ }
+ candidateRoutes := c.selectRoutes(detectedService, requestTokens)
+ if len(candidateRoutes) == 0 {
+ if trace {
+ traceLogger.Printf("no Route in WebService with path %s was found to match URL path:%s\n", detectedService.rootPath, httpRequest.URL.Path)
+ }
+ return detectedService, nil, NewError(http.StatusNotFound, "404: Page Not Found")
+ }
+ selectedRoute, err := c.detectRoute(candidateRoutes, httpRequest)
+ if selectedRoute == nil {
+ return detectedService, nil, err
+ }
+ return detectedService, selectedRoute, nil
+}
+
+// selectRoutes return a collection of Route from a WebService that matches the path tokens from the request.
+func (c CurlyRouter) selectRoutes(ws *WebService, requestTokens []string) sortableCurlyRoutes {
+ candidates := sortableCurlyRoutes{}
+ for _, each := range ws.routes {
+ matches, paramCount, staticCount := c.matchesRouteByPathTokens(each.pathParts, requestTokens)
+ if matches {
+ candidates.add(curlyRoute{each, paramCount, staticCount}) // TODO make sure Routes() return pointers?
+ }
+ }
+ sort.Sort(sort.Reverse(candidates))
+ return candidates
+}
+
+// matchesRouteByPathTokens computes whether it matches, howmany parameters do match and what the number of static path elements are.
+func (c CurlyRouter) matchesRouteByPathTokens(routeTokens, requestTokens []string) (matches bool, paramCount int, staticCount int) {
+ if len(routeTokens) < len(requestTokens) {
+ // proceed in matching only if last routeToken is wildcard
+ count := len(routeTokens)
+ if count == 0 || !strings.HasSuffix(routeTokens[count-1], "*}") {
+ return false, 0, 0
+ }
+ // proceed
+ }
+ for i, routeToken := range routeTokens {
+ if i == len(requestTokens) {
+ // reached end of request path
+ return false, 0, 0
+ }
+ requestToken := requestTokens[i]
+ if strings.HasPrefix(routeToken, "{") {
+ paramCount++
+ if colon := strings.Index(routeToken, ":"); colon != -1 {
+ // match by regex
+ matchesToken, matchesRemainder := c.regularMatchesPathToken(routeToken, colon, requestToken)
+ if !matchesToken {
+ return false, 0, 0
+ }
+ if matchesRemainder {
+ break
+ }
+ }
+ } else { // no { prefix
+ if requestToken != routeToken {
+ return false, 0, 0
+ }
+ staticCount++
+ }
+ }
+ return true, paramCount, staticCount
+}
+
+// regularMatchesPathToken tests whether the regular expression part of routeToken matches the requestToken or all remaining tokens
+// format routeToken is {someVar:someExpression}, e.g. {zipcode:[\d][\d][\d][\d][A-Z][A-Z]}
+func (c CurlyRouter) regularMatchesPathToken(routeToken string, colon int, requestToken string) (matchesToken bool, matchesRemainder bool) {
+ regPart := routeToken[colon+1 : len(routeToken)-1]
+ if regPart == "*" {
+ if trace {
+ traceLogger.Printf("wildcard parameter detected in route token %s that matches %s\n", routeToken, requestToken)
+ }
+ return true, true
+ }
+ matched, err := regexp.MatchString(regPart, requestToken)
+ return (matched && err == nil), false
+}
+
+var jsr311Router = RouterJSR311{}
+
+// detectRoute selectes from a list of Route the first match by inspecting both the Accept and Content-Type
+// headers of the Request. See also RouterJSR311 in jsr311.go
+func (c CurlyRouter) detectRoute(candidateRoutes sortableCurlyRoutes, httpRequest *http.Request) (*Route, error) {
+ // tracing is done inside detectRoute
+ return jsr311Router.detectRoute(candidateRoutes.routes(), httpRequest)
+}
+
+// detectWebService returns the best matching webService given the list of path tokens.
+// see also computeWebserviceScore
+func (c CurlyRouter) detectWebService(requestTokens []string, webServices []*WebService) *WebService {
+ var best *WebService
+ score := -1
+ for _, each := range webServices {
+ matches, eachScore := c.computeWebserviceScore(requestTokens, each.pathExpr.tokens)
+ if matches && (eachScore > score) {
+ best = each
+ score = eachScore
+ }
+ }
+ return best
+}
+
+// computeWebserviceScore returns whether tokens match and
+// the weighted score of the longest matching consecutive tokens from the beginning.
+func (c CurlyRouter) computeWebserviceScore(requestTokens []string, tokens []string) (bool, int) {
+ if len(tokens) > len(requestTokens) {
+ return false, 0
+ }
+ score := 0
+ for i := 0; i < len(tokens); i++ {
+ each := requestTokens[i]
+ other := tokens[i]
+ if len(each) == 0 && len(other) == 0 {
+ score++
+ continue
+ }
+ if len(other) > 0 && strings.HasPrefix(other, "{") {
+ // no empty match
+ if len(each) == 0 {
+ return false, score
+ }
+ score += 1
+ } else {
+ // not a parameter
+ if each != other {
+ return false, score
+ }
+ score += (len(tokens) - i) * 10 //fuzzy
+ }
+ }
+ return true, score
+}