Upgrade internals for page versitility.

Fix a bug in goinfo

conf/page.go

@@ -0,0 +1,19 @@
+package conf
+
+import "strings"
+
+type PageYaml struct {
+	PageName string `yaml:"pageName"`
+	PagePath string `yaml:"pagePath"`
+}
+
+func (py PageYaml) GetPagePath() string {
+	toReturn := py.PagePath
+	if !strings.HasSuffix(toReturn, ".go") {
+		toReturn += ".go"
+	}
+	if !strings.HasPrefix(toReturn, "/") {
+		toReturn = "/" + toReturn
+	}
+	return toReturn
+}

conf/serve.go

@@ -9,10 +9,13 @@ import (
 
 type ServeYaml struct {
 	DataStorage      string            `yaml:"dataStorage"`
+	TemplateStorage  string            `yaml:"templateStorage"`
 	Domains          []string          `yaml:"domains"`
 	RangeSupported   bool              `yaml:"rangeSupported"`
 	EnableGoInfoPage bool              `yaml:"enableGoInfoPage"`
 	CacheSettings    CacheSettingsYaml `yaml:"cacheSettings"`
+	PageSettings     []PageYaml        `yaml:"pageSettings"`
+	YmlDataFallback  bool              `yaml:"ymlDataFallback"`
 }
 
 func (sy ServeYaml) GetDomainString() string {
@@ -39,3 +42,20 @@ func (sy ServeYaml) GetDataStoragePath() string {
 		return sy.DataStorage
 	}
 }
+
+func (sy ServeYaml) GetTemplateStoragePath() string {
+	if sy.TemplateStorage == "" || !filepath.IsAbs(sy.TemplateStorage) {
+		wd, err := os.Getwd()
+		if err != nil {
+			return ""
+		} else {
+			if sy.TemplateStorage == "" {
+				return wd
+			} else {
+				return path.Join(wd, sy.TemplateStorage)
+			}
+		}
+	} else {
+		return sy.TemplateStorage
+	}
+}

config.example.yml

@@ -4,9 +4,13 @@ listen:
   webMethod: "http"
   identify: true
 serve:
+  dataStorage: ""
+  domains: []
   rangeSupported: true
   enableGoInfoPage: true
   cacheSettings:
+    enableTemplateCaching: false
+    enableTemplateCachePurge: false
     enableContentsCaching: true
     enableContentsCachePurge: true
     maxAge: 3600

goinfo.go.html

@@ -150,6 +150,10 @@
         <th>Memory Page Size</th>
         <td>{{ .PageSize }}</td>
     </tr>
+    <tr>
+        <th>System Time</th>
+        <td>{{ .CurrentTime }}</td>
+    </tr>
 </table>
 </p>
 <p>

pageHandler/go-info-page.go

@@ -45,6 +45,7 @@ func (gipg *goInfoPage) GetCacheIDExtension(urlParameters url.Values) string {
 
 type goInfoTemplateMarshal struct {
 	FullOutput         bool
+	CurrentTime        time.Time
 	RegisteredPages    []string
 	CachedPages        []string
 	ProcessID          int
@@ -98,6 +99,7 @@ func (gipg *goInfoPage) GetContents(urlParameters url.Values) (contentType strin
 	theBuffer := &io.BufferedWriter{}
 	err = theTemplate.ExecuteTemplate(theBuffer, templateName, &goInfoTemplateMarshal{
 		FullOutput:         urlParameters.Has("full"),
+		CurrentTime:        time.Now(),
 		RegisteredPages:    regPages,
 		CachedPages:        cacPages,
 		ProcessID:          os.Getpid(),

pageHandler/page-handler.go

@@ -43,9 +43,9 @@ func NewPageHandler(config conf.ServeYaml) *PageHandler {
 		CacheSettings:            config.CacheSettings,
 	}
 	if config.EnableGoInfoPage {
-		toReturn.PageProviders = GetProviders(config.CacheSettings.EnableTemplateCaching, config.DataStorage, toReturn)
+		toReturn.PageProviders = GetProviders(config.CacheSettings.EnableTemplateCaching, config.GetDataStoragePath(), toReturn, config.GetTemplateStoragePath(), config.PageSettings, config.YmlDataFallback)
 	} else {
-		toReturn.PageProviders = GetProviders(config.CacheSettings.EnableTemplateCaching, config.DataStorage, nil)
+		toReturn.PageProviders = GetProviders(config.CacheSettings.EnableTemplateCaching, config.GetDataStoragePath(), nil, config.GetTemplateStoragePath(), config.PageSettings, config.YmlDataFallback)
 	}
 	return toReturn
 }
@@ -286,6 +286,9 @@ func (ph *PageHandler) GetRegisteredPages() []string {
 }
 
 func (ph *PageHandler) GetCachedPages() []string {
+	if ph.pageContentsCacheRWMutex == nil {
+		return make([]string, 0)
+	}
 	ph.pageContentsCacheRWMutex.RLock()
 	defer ph.pageContentsCacheRWMutex.RUnlock()
 	pages := make([]string, len(ph.PageContentsCache))
@@ -298,6 +301,9 @@ func (ph *PageHandler) GetCachedPages() []string {
 }
 
 func (ph *PageHandler) GetNumberOfCachedPages() int {
+	if ph.pageContentsCacheRWMutex == nil {
+		return 0
+	}
 	ph.pageContentsCacheRWMutex.RLock()
 	defer ph.pageContentsCacheRWMutex.RUnlock()
 	return len(ph.PageContentsCache)

pageHandler/pages.go

@@ -1,18 +1,26 @@
 package pageHandler
 
-import "golang.captainalm.com/cityuni-webserver/pageHandler/pages/index"
+import (
+	"golang.captainalm.com/cityuni-webserver/conf"
+	"golang.captainalm.com/cityuni-webserver/pageHandler/pages/index"
+	"strings"
+)
 
 var providers map[string]PageProvider
 
-func GetProviders(cacheTemplates bool, dataStorage string, pageHandler *PageHandler) map[string]PageProvider {
+func GetProviders(cacheTemplates bool, dataStorage string, pageHandler *PageHandler, templateStorage string, pageSettings []conf.PageYaml, ymlDataFallback bool) map[string]PageProvider {
 	if providers == nil {
 		providers = make(map[string]PageProvider)
 		if pageHandler != nil {
 			infoPage := newGoInfoPage(pageHandler, dataStorage, cacheTemplates)
 			providers[infoPage.GetPath()] = infoPage //Go Information Page
 		}
-		indexPage := index.NewPage(dataStorage, cacheTemplates)
-		providers[indexPage.GetPath()] = indexPage
+		for _, cpg := range pageSettings { //Register pages
+			if strings.EqualFold(cpg.PageName, index.PageName) {
+				indexPage := index.NewPage(dataStorage, cacheTemplates, templateStorage, cpg.GetPagePath(), ymlDataFallback)
+				providers[indexPage.GetPath()] = indexPage
+			}
+		}
 	}
 	return providers
 }

pageHandler/pages/index/index-page.go

@@ -1,6 +1,7 @@
 package index
 
 import (
+	"errors"
 	"golang.captainalm.com/cityuni-webserver/utils/io"
 	"gopkg.in/yaml.v3"
 	"html/template"
@@ -12,10 +13,10 @@ import (
 	"time"
 )
 
+const PageName = "index"
 const templateName = "index.go.html"
-const yamlName = "index.go.yml"
 
-func NewPage(dataStore string, cacheTemplates bool) *Page {
+func NewPage(dataStore string, cacheTemplates bool, templateStore string, pagePath string, ymlDataFallback bool) *Page {
 	var ptm *sync.Mutex
 	var sdm *sync.Mutex
 	if cacheTemplates {
@@ -23,7 +24,10 @@ func NewPage(dataStore string, cacheTemplates bool) *Page {
 		sdm = &sync.Mutex{}
 	}
 	pageToReturn := &Page{
-		DataStore:         dataStore,
+		YMLDataFallback:   ymlDataFallback,
+		PagePath:          pagePath,
+		DataPath:          path.Join(dataStore, pagePath),
+		TemplatePath:      path.Join(templateStore, templateName),
 		StoredDataMutex:   sdm,
 		PageTemplateMutex: ptm,
 	}
@@ -31,7 +35,10 @@ func NewPage(dataStore string, cacheTemplates bool) *Page {
 }
 
 type Page struct {
-	DataStore            string
+	YMLDataFallback      bool
+	PagePath             string
+	DataPath             string
+	TemplatePath         string
 	StoredDataMutex      *sync.Mutex
 	StoredData           *DataYaml
 	LastModifiedData     time.Time
@@ -41,7 +48,7 @@ type Page struct {
 }
 
 func (p *Page) GetPath() string {
-	return "/index.go"
+	return p.PagePath
 }
 
 func (p *Page) GetLastModified() time.Time {
@@ -129,16 +136,12 @@ func (p *Page) getPageTemplate() (*template.Template, error) {
 		defer p.PageTemplateMutex.Unlock()
 	}
 	if p.PageTemplate == nil {
-		thePath := templateName
-		if p.DataStore != "" {
-			thePath = path.Join(p.DataStore, thePath)
-		}
-		stat, err := os.Stat(thePath)
+		stat, err := os.Stat(p.TemplatePath)
 		if err != nil {
 			return nil, err
 		}
 		p.LastModifiedTemplate = stat.ModTime()
-		loadedData, err := os.ReadFile(thePath)
+		loadedData, err := os.ReadFile(p.TemplatePath)
 		if err != nil {
 			return nil, err
 		}
@@ -161,13 +164,18 @@ func (p *Page) getPageData() (*DataYaml, error) {
 		defer p.StoredDataMutex.Unlock()
 	}
 	if p.StoredData == nil {
-		thePath := yamlName
-		if p.DataStore != "" {
-			thePath = path.Join(p.DataStore, thePath)
-		}
+		thePath := p.DataPath
 		stat, err := os.Stat(thePath)
 		if err != nil {
-			return nil, err
+			if p.YMLDataFallback && errors.Is(err, os.ErrNotExist) {
+				thePath += ".yml"
+				stat, err = os.Stat(thePath)
+				if err != nil {
+					return nil, err
+				}
+			} else {
+				return nil, err
+			}
 		}
 		p.LastModifiedData = stat.ModTime()
 		fileHandle, err := os.Open(thePath)
@@ -189,6 +197,7 @@ func (p *Page) getPageData() (*DataYaml, error) {
 			p.StoredData = dataYaml
 		}
 		return dataYaml, nil
+
 	} else {
 		return p.StoredData, nil
 	}