Switch over cache handling system.

Add more values for the Go Info page.

pageHandler/go-info-page.go

@@ -36,14 +36,27 @@ type goInfoPage struct {
 	PageTemplate      *template.Template
 }
 
+func (gipg *goInfoPage) GetCacheIDExtension(urlParameters url.Values) string {
+	if urlParameters.Has("full") {
+		return "full"
+	} else {
+		return ""
+	}
+}
+
 type goInfoTemplateMarshal struct {
 	FullOutput         bool
 	RegisteredPages    []string
 	CachedPages        []string
+	ProcessID          int
+	ProductLocation    string
 	ProductName        string
 	ProductDescription string
 	BuildVersion       string
 	BuildDate          string
+	WorkingDirectory   string
+	Hostname           string
+	PageSize           int
 	GoVersion          string
 	GoRoutineNum       int
 	GoCGoCallNum       int64
@@ -52,6 +65,7 @@ type goInfoTemplateMarshal struct {
 	GoMaxProcs         int
 	ListenSettings     conf.ListenYaml
 	ServeSettings      conf.ServeYaml
+	Environment        []string
 }
 
 func (gipg *goInfoPage) GetPath() string {
@@ -72,14 +86,30 @@ func (gipg *goInfoPage) GetContents(urlParameters url.Values) (contentType strin
 		return "text/plain", []byte("Cannot Get Info.\r\n" + err.Error()), false
 	}
 	theBuffer := &utils.BufferedWriter{}
+	var regPages []string
+	var cacPages []string
+	env := make([]string, 0)
+	if urlParameters.Has("full") {
+		regPages = gipg.Handler.GetRegisteredPages()
+		cacPages = gipg.Handler.GetCachedPages()
+		env = os.Environ()
+	} else {
+		regPages = make([]string, len(gipg.Handler.PageProviders))
+		cacPages = make([]string, gipg.Handler.GetNumberOfCachedPages())
+	}
 	err = theTemplate.ExecuteTemplate(theBuffer, templateName, &goInfoTemplateMarshal{
 		FullOutput:         urlParameters.Has("full"),
-		RegisteredPages:    gipg.Handler.GetRegisteredPages(),
-		CachedPages:        gipg.Handler.GetCachedPages(),
+		RegisteredPages:    regPages,
+		CachedPages:        cacPages,
+		ProcessID:          os.Getpid(),
+		ProductLocation:    getStringOrError(os.Executable),
 		ProductName:        info.BuildName,
 		ProductDescription: info.BuildDescription,
 		BuildVersion:       info.BuildVersion,
 		BuildDate:          info.BuildDate,
+		WorkingDirectory:   getStringOrError(os.Getwd),
+		Hostname:           getStringOrError(os.Hostname),
+		PageSize:           os.Getpagesize(),
 		GoVersion:          runtime.Version(),
 		GoRoutineNum:       runtime.NumGoroutine(),
 		GoCGoCallNum:       runtime.NumCgoCall(),
@@ -88,6 +118,7 @@ func (gipg *goInfoPage) GetContents(urlParameters url.Values) (contentType strin
 		GoMaxProcs:         runtime.GOMAXPROCS(0),
 		ListenSettings:     info.ListenSettings,
 		ServeSettings:      info.ServeSettings,
+		Environment:        env,
 	})
 	if err != nil {
 		return "text/plain", []byte("Cannot Get Info.\r\n" + err.Error()), false
@@ -129,3 +160,12 @@ func (gipg *goInfoPage) getPageTemplate() (*template.Template, error) {
 		return gipg.PageTemplate, nil
 	}
 }
+
+func getStringOrError(funcIn func() (string, error)) string {
+	toReturn, err := funcIn()
+	if err == nil {
+		return toReturn
+	} else {
+		return "Error: " + err.Error()
+	}
+}

pageHandler/page-handler.go

@@ -53,26 +53,30 @@ func NewPageHandler(config conf.ServeYaml) *PageHandler {
 
 func (ph *PageHandler) ServeHTTP(writer http.ResponseWriter, request *http.Request) {
 	actualPagePath := strings.TrimRight(request.URL.Path, "/")
-	queryCollection, actualQueries := ph.GetCleanQuery(request)
 
+	var currentProvider PageProvider
+	canCache := false
+	actualQueries := ""
+	queryValues := request.URL.Query()
 	var pageContent []byte
-	var pageContentType string
+	pageContentType := ""
 	var lastMod time.Time
 
-	if ph.CacheSettings.EnableContentsCaching {
-		cached := ph.getPageFromCache(request.URL, actualQueries)
-		if cached != nil {
-			pageContent = cached.Content
-			pageContentType = cached.ContentType
-			lastMod = cached.LastMod
-		}
-	}
+	if currentProvider = ph.PageProviders[actualPagePath]; currentProvider != nil {
+		actualQueries = currentProvider.GetCacheIDExtension(queryValues)
 
-	if pageContentType == "" {
-		if provider := ph.PageProviders[actualPagePath]; provider != nil {
-			var canCache bool
-			pageContentType, pageContent, canCache = provider.GetContents(queryCollection)
-			lastMod = provider.GetLastModified()
+		if ph.CacheSettings.EnableContentsCaching {
+			cached := ph.getPageFromCache(request.URL, actualQueries)
+			if cached != nil {
+				pageContent = cached.Content
+				pageContentType = cached.ContentType
+				lastMod = cached.LastMod
+			}
+		}
+
+		if pageContentType == "" {
+			pageContentType, pageContent, canCache = currentProvider.GetContents(queryValues)
+			lastMod = currentProvider.GetLastModified()
 			if pageContentType != "" && canCache && ph.CacheSettings.EnableContentsCaching {
 				ph.setPageToCache(request.URL, actualQueries, &CachedPage{
 					Content:     pageContent,
@@ -163,50 +167,6 @@ func (ph *PageHandler) ServeHTTP(writer http.ResponseWriter, request *http.Reque
 	}
 }
 
-func (ph *PageHandler) GetCleanQuery(request *http.Request) (url.Values, string) {
-	toClean := request.URL.Query()
-	provider := ph.PageProviders[request.URL.Path]
-	if provider == nil {
-		return make(url.Values), ""
-	}
-	supportedKeys := provider.GetSupportedURLParameters()
-	var toDelete []string
-	if ph.FilterURLQueries {
-		toDelete = make([]string, len(toClean))
-	}
-	theSize := 0
-	theQuery := ""
-	for s, v := range toClean {
-		noExist := true
-		for _, key := range supportedKeys {
-			if s == key {
-				noExist = false
-				break
-			}
-		}
-		if noExist {
-			if ph.FilterURLQueries {
-				toDelete[theSize] = s
-				theSize++
-			}
-		} else {
-			for _, i := range v {
-				if i == "" {
-					theQuery += s + "&"
-				} else {
-					theQuery += s + "=" + i + "&"
-				}
-			}
-		}
-	}
-	if ph.FilterURLQueries {
-		for i := 0; i < theSize; i++ {
-			delete(toClean, toDelete[i])
-		}
-	}
-	return toClean, strings.TrimRight(theQuery, "&")
-}
-
 func (ph *PageHandler) PurgeContentsCache(path string, query string) {
 	if ph.CacheSettings.EnableContentsCaching && ph.CacheSettings.EnableContentsCachePurge {
 		if path == "" {
@@ -313,8 +273,8 @@ func (ph *PageHandler) GetRegisteredPages() []string {
 }
 
 func (ph *PageHandler) GetCachedPages() []string {
-	ph.pageContentsCacheRWMutex.Lock()
-	defer ph.pageContentsCacheRWMutex.Unlock()
+	ph.pageContentsCacheRWMutex.RLock()
+	defer ph.pageContentsCacheRWMutex.RUnlock()
 	pages := make([]string, len(ph.PageContentsCache))
 	index := 0
 	for s := range ph.PageContentsCache {
@@ -323,3 +283,9 @@ func (ph *PageHandler) GetCachedPages() []string {
 	}
 	return pages
 }
+
+func (ph *PageHandler) GetNumberOfCachedPages() int {
+	ph.pageContentsCacheRWMutex.RLock()
+	defer ph.pageContentsCacheRWMutex.RUnlock()
+	return len(ph.PageContentsCache)
+}

pageHandler/page-provider.go

@@ -7,8 +7,8 @@ import (
 
 type PageProvider interface {
 	GetPath() string
-	GetSupportedURLParameters() []string
 	GetLastModified() time.Time
+	GetCacheIDExtension(urlParameters url.Values) string
 	GetContents(urlParameters url.Values) (contentType string, contents []byte, canCache bool)
 	PurgeTemplate()
 }