package pageHandler import ( "golang.captainalm.com/cityuni-webserver/conf" "golang.captainalm.com/cityuni-webserver/utils/info" "golang.captainalm.com/cityuni-webserver/utils/io" "html/template" "net/url" "os" "path" "runtime" "sync" "time" ) const templateName = "goinfo.go.html" func newGoInfoPage(handlerIn *PageHandler, dataStore string, cacheTemplates bool) *goInfoPage { var ptm *sync.Mutex if cacheTemplates { ptm = &sync.Mutex{} } pageToReturn := &goInfoPage{ Handler: handlerIn, DataStore: dataStore, PageTemplateMutex: ptm, } return pageToReturn } type goInfoPage struct { Handler *PageHandler DataStore string PageTemplateMutex *sync.Mutex PageTemplate *template.Template } func (gipg *goInfoPage) GetCacheIDExtension(urlParameters url.Values) string { if urlParameters.Has("full") { return "full" } else { return "" } } type goInfoTemplateMarshal struct { FullOutput bool CurrentTime time.Time RegisteredPages []string CachedPages []string ProcessID int ParentProcessID int ProductLocation string ProductName string ProductDescription string BuildVersion string BuildDate string WorkingDirectory string Hostname string PageSize int GoVersion string GoRoutineNum int GoCGoCallNum int64 NumCPU int GoRoot string GoMaxProcs int Compiler string GoArch string GoOS string ListenSettings conf.ListenYaml ServeSettings conf.ServeYaml Environment []string } func (gipg *goInfoPage) GetPath() string { return "/goinfo.go" } func (gipg *goInfoPage) GetLastModified() time.Time { return time.Now() } func (gipg *goInfoPage) GetContents(urlParameters url.Values) (contentType string, contents []byte, canCache bool) { theTemplate, err := gipg.getPageTemplate() if err != nil { return "text/plain", []byte("Cannot Get Info.\r\n" + err.Error()), false } 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()) } theBuffer := &io.BufferedWriter{} err = theTemplate.ExecuteTemplate(theBuffer, templateName, &goInfoTemplateMarshal{ FullOutput: urlParameters.Has("full"), CurrentTime: time.Now(), RegisteredPages: regPages, CachedPages: cacPages, ProcessID: os.Getpid(), ParentProcessID: os.Getppid(), 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(), NumCPU: runtime.NumCPU(), GoRoot: runtime.GOROOT(), GoMaxProcs: runtime.GOMAXPROCS(0), Compiler: runtime.Compiler, GoArch: runtime.GOARCH, GoOS: runtime.GOOS, ListenSettings: info.ListenSettings, ServeSettings: info.ServeSettings, Environment: env, }) if err != nil { return "text/plain", []byte("Cannot Get Info.\r\n" + err.Error()), false } return "text/html", theBuffer.Data, false } func (gipg *goInfoPage) PurgeTemplate() { if gipg.PageTemplateMutex != nil { gipg.PageTemplateMutex.Lock() gipg.PageTemplate = nil gipg.PageTemplateMutex.Unlock() } } func (gipg *goInfoPage) getPageTemplate() (*template.Template, error) { if gipg.PageTemplateMutex != nil { gipg.PageTemplateMutex.Lock() defer gipg.PageTemplateMutex.Unlock() } if gipg.PageTemplate == nil { thePath := templateName if gipg.DataStore != "" { thePath = path.Join(gipg.DataStore, thePath) } loadedData, err := os.ReadFile(thePath) if err != nil { return nil, err } tmpl, err := template.New(templateName).Parse(string(loadedData)) if err != nil { return nil, err } if gipg.PageTemplateMutex != nil { gipg.PageTemplate = tmpl } return tmpl, nil } else { return gipg.PageTemplate, nil } } func getStringOrError(funcIn func() (string, error)) string { toReturn, err := funcIn() if err == nil { return toReturn } else { return "Error: " + err.Error() } }