rewrite server module
This commit is contained in:
120
modules/server/archive.go
Normal file
120
modules/server/archive.go
Normal file
@@ -0,0 +1,120 @@
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package server
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import (
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"fmt"
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"net/http"
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"os"
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"path"
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"path/filepath"
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"sort"
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"strings"
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"text/template"
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"time"
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)
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/* this indexes and generate the page for viewing the archive directory */
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func generateArchiveIndex(fsPath string, urlPath string) (string, error) {
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info, err := os.Stat(fsPath)
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if err != nil {
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return "", err
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}
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if !info.IsDir() {
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return "", fmt.Errorf("not a directory")
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}
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ents, err := os.ReadDir(fsPath)
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if err != nil {
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return "", err
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}
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type entryInfo struct {
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name string
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isDir bool
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href string
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size int64
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mod time.Time
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}
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var list []entryInfo
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for _, e := range ents {
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n := e.Name()
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full := filepath.Join(fsPath, n)
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st, err := os.Stat(full)
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if err != nil {
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continue
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}
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isd := st.IsDir()
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displayName := n
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if isd {
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displayName = n + "/"
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}
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href := path.Join(urlPath, n)
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if isd && !strings.HasSuffix(href, "/") {
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href = href + "/"
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}
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size := int64(-1)
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if !isd {
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size = st.Size()
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}
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list = append(list, entryInfo{name: displayName, isDir: isd, href: href, size: size, mod: st.ModTime()})
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}
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sort.Slice(list, func(i, j int) bool {
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if list[i].isDir != list[j].isDir {
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return list[i].isDir
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}
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return strings.ToLower(list[i].name) < strings.ToLower(list[j].name)
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})
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urlPath = strings.TrimPrefix(urlPath, "/archive")
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var b strings.Builder
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b.WriteString("<html>\n<head><title>Index of ")
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b.WriteString(template.HTMLEscapeString(urlPath))
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b.WriteString("</title></head>\n<body>\n<h1>Index of ")
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b.WriteString(template.HTMLEscapeString(urlPath))
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b.WriteString("</h1><hr><pre>")
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if urlPath != "/" {
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b.WriteString(
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`<a href="/archive` +
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template.HTMLEscapeString(path.Dir(strings.TrimSuffix(urlPath, "/"))) +
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`">../</a>` + "\n",
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)
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} else {
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b.WriteString(
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`<a href="/">../</a>` + "\n",
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)
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}
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nameCol := 50
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for _, ei := range list {
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escapedName := template.HTMLEscapeString(ei.name)
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dateStr := ei.mod.Local().Format("02-Jan-2006 15:04")
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var sizeStr string
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if ei.isDir {
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sizeStr = "-"
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} else {
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sizeStr = fmt.Sprintf("%d", ei.size)
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}
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spaces := 1
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if len(escapedName) < nameCol {
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spaces = nameCol - len(escapedName)
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}
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line := `<a href="` + template.HTMLEscapeString(ei.href) + `">` + escapedName + `</a>` + strings.Repeat(" ", spaces) + dateStr + strings.Repeat(" ", 19-len(sizeStr)) + sizeStr + "\n"
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b.WriteString(line)
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}
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b.WriteString("</pre><hr></body>\n</html>")
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return b.String(), nil
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}
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/* helper to read the archive files */
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func readArchive(w http.ResponseWriter, route string) error {
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fsPath := "." + route
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if info, err := os.Stat(fsPath); err == nil && info.IsDir() {
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if page, err := generateArchiveIndex(fsPath, route); err == nil {
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w.Write([]byte(page))
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return nil
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} else {
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return err
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}
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}
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return nil
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}
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80
modules/server/dirs.go
Normal file
80
modules/server/dirs.go
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@@ -0,0 +1,80 @@
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package server
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import (
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"fes/modules/ui"
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"fmt"
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"os"
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"path/filepath"
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"strings"
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)
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/* performs relavent handling based on the directory passaed
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*
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* Special directories
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* - www/ <= contains lua routes.
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* - static/ <= static content accessable at /static/path or /static/dir/path.
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* - include/ <= globally accessable lua functions, cannot directly access "fes" right now.
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* - archive/ <= contains user facing files such as archives or dists.
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*
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*/
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func handleDir(entries []os.DirEntry, dir string, routes map[string]string, base string, isStatic bool) error {
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for _, entry := range entries {
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path := filepath.Join(dir, entry.Name())
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if entry.IsDir() {
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nextBase := joinBase(base, entry.Name())
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subEntries, err := os.ReadDir(path)
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if err != nil {
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return fmt.Errorf("failed to read directory %s: %w", path, err)
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}
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if err := handleDir(subEntries, path, routes, nextBase, isStatic); err != nil {
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return err
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}
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continue
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}
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route := joinBase(base, entry.Name())
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if !isStatic && strings.HasSuffix(entry.Name(), ".lua") {
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name := strings.TrimSuffix(entry.Name(), ".lua")
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if name == "index" {
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routes[basePath(base)] = path
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routes[route] = path
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continue
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}
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route = joinBase(base, name)
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} else if !isStatic && strings.HasSuffix(entry.Name(), ".md") {
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name := strings.TrimSuffix(entry.Name(), ".md")
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if name == "index" {
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routes[basePath(base)] = path
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routes[route] = path
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continue
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}
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route = joinBase(base, name)
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}
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routes[route] = path
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}
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return nil
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}
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/* helper to load all special directories */
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func loadDirs() map[string]string {
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routes := make(map[string]string)
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if entries, err := os.ReadDir("www"); err == nil {
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if err := handleDir(entries, "www", routes, "", false); err != nil {
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ui.Warning("failed to handle www directory", err)
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}
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}
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if entries, err := os.ReadDir("static"); err == nil {
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if err := handleDir(entries, "static", routes, "/static", true); err != nil {
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ui.Warning("failed to handle static directory", err)
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}
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}
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if entries, err := os.ReadDir("archive"); err == nil {
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if err := handleDir(entries, "archive", routes, "/archive", true); err != nil {
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ui.Warning("failed to handle archive directory", err)
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}
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}
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return routes
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}
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@@ -1,6 +1,164 @@
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package server
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/* returns a string of rendered html */
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func render(luapath string) (string, error) {
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return "", nil
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import (
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"fes/modules/config"
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"io/fs"
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"os"
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"path/filepath"
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"strings"
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lua "github.com/yuin/gopher-lua"
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)
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/* this is the request data we pass over the bus to the application, via the fes.bus interface */
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type reqData struct {
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path string
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params map[string]string
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}
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/* returns a string of rendered html */
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func render(luapath string, requestData reqData) ([]byte, error) {
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L := lua.NewState()
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defer L.Close()
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if lib, err := fs.ReadDir(config.Lib, "lib"); err == nil {
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for _, de := range lib {
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if de.IsDir() || !strings.HasSuffix(de.Name(), ".lua") {
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continue
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}
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path := filepath.Join("lib", de.Name())
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if data, err := config.Lib.ReadFile(path); err != nil {
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continue
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} else {
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L.DoString(string(data))
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}
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}
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}
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preloadLuaModule := func(name, path string) {
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L.PreloadModule(name, func(L *lua.LState) int {
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fileData, err := config.Lib.ReadFile(path)
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if err != nil {
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panic(err)
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}
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if err := L.DoString(string(fileData)); err != nil {
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panic(err)
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}
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L.Push(L.Get(-1))
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return 1
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})
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}
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preloadLuaModule("lib.std", "lib/std.lua")
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preloadLuaModule("lib.symbol", "lib/symbol.lua")
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preloadLuaModule("lib.util", "lib/util.lua")
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L.PreloadModule("fes", func(L *lua.LState) int {
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mod := L.NewTable()
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libModules := []string{}
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if ents, err := fs.ReadDir(config.Lib, "lib"); err == nil {
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for _, e := range ents {
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if e.IsDir() || !strings.HasSuffix(e.Name(), ".lua") {
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continue
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}
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libModules = append(libModules, strings.TrimSuffix(e.Name(), ".lua"))
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}
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}
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for _, modName := range libModules {
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path := filepath.Join("lib", modName+".lua")
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fileData, err := config.Lib.ReadFile(path)
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if err != nil {
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continue
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}
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if err := L.DoString(string(fileData)); err != nil {
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continue
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}
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val := L.Get(-1)
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L.Pop(1)
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tbl, ok := val.(*lua.LTable)
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if !ok || tbl == nil {
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tbl = L.NewTable()
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}
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if modName == "fes" {
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tbl.ForEach(func(k, v lua.LValue) { mod.RawSet(k, v) })
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} else {
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mod.RawSetString(modName, tbl)
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}
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}
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mod.RawSetString("app", func() *lua.LTable {
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app := L.NewTable()
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includeDir := "include"
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includes, err := os.ReadDir(includeDir)
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if err != nil {
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return app // load no includes
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}
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for _, de := range includes {
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if de.IsDir() || !strings.HasSuffix(de.Name(), ".lua") {
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continue
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}
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base := strings.TrimSuffix(de.Name(), ".lua")
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path := filepath.Join(includeDir, de.Name())
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if _, err := os.Stat(path); err != nil {
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continue
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} else if err := L.DoFile(path); err != nil {
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continue
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}
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val := L.Get(-1)
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L.Pop(1)
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tbl, ok := val.(*lua.LTable)
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if !ok || tbl == nil {
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tbl = L.NewTable()
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}
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app.RawSetString(base, tbl)
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}
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return app
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}())
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bus := L.NewTable()
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bus.RawSetString("url", lua.LString(requestData.path))
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params := L.NewTable()
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for k, v := range requestData.params {
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params.RawSetString(k, lua.LString(v))
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}
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bus.RawSetString("params", params)
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mod.RawSetString("bus", bus)
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mod.RawSetString("markdown_to_html", L.NewFunction(func(L *lua.LState) int {
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L.Push(lua.LString(markdownToHTML(L.ToString(1))))
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return 1
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}))
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L.Push(mod)
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return 1
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})
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if err := L.DoFile(luapath); err != nil {
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return []byte(""), err
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}
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if L.GetTop() == 0 {
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return []byte(""), nil
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}
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L.SetGlobal("__fes_result", L.Get(-1))
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if err := L.DoString("return tostring(__fes_result)"); err != nil {
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L.GetGlobal("__fes_result")
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if s := L.ToString(-1); s != "" {
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return []byte(s), nil
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}
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return []byte(""), nil
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}
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if s := L.ToString(-1); s != "" {
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return []byte(s), nil
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}
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return []byte(""), nil
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}
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@@ -2,17 +2,74 @@ package server
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import (
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"fes/modules/config"
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"fes/modules/ui"
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"fmt"
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"log"
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"net/http"
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"os"
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"path/filepath"
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"strings"
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)
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var routes map[string]string
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func Start(dir string) {
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http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
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w.Write([]byte("<h1>Sup bitch</h1>"))
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})
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if err := os.Chdir(dir); err != nil {
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ui.Error(fmt.Sprintf("failed to change directory to %s", dir), err)
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}
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log.Fatal(http.ListenAndServe(fmt.Sprintf(":%d", *config.Port), nil))
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ui.Log("running root=%s, port=%d.", filepath.Clean(dir), *config.Port)
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routes := loadDirs()
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http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
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route, ok := routes[r.URL.Path]
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var err error = nil
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/* defer won't update paramaters unless we do this. */
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defer func() {
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ui.Path(route, err)
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}()
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if !ok {
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err = config.ErrRouteMiss
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route = r.URL.Path
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if strings.HasPrefix(route, "/archive") {
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err = readArchive(w, route)
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} else {
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w.WriteHeader(http.StatusNotFound)
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w.Write([]byte("not found :("))
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}
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return
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}
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params := make(map[string]string)
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for k, v := range r.URL.Query() {
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if len(v) > 0 {
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params[k] = v[0]
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}
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}
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var data []byte
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if strings.HasSuffix(route, ".lua") {
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data, err = render(route, reqData{path: r.URL.Path, params: params})
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} else if strings.HasSuffix(route, ".md") {
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data, err = os.ReadFile(route)
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data = []byte(markdownToHTML(string(data)))
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data = []byte("<style>body {max-width: 80ch;}</style>\n" + string(data))
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} else {
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data, err = os.ReadFile(route)
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}
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if err != nil {
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http.Error(w, fmt.Sprintf("Error loading page: %v", err), http.StatusInternalServerError)
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}
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w.Write(data)
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})
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ui.Log("Server initialized")
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log.Fatal(http.ListenAndServe(fmt.Sprintf("0.0.0.0:%d", *config.Port), nil))
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}
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@@ -15,3 +15,17 @@ func markdownToHTML(mdText string) string {
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renderer := html.NewRenderer(opts)
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return string(markdown.Render(doc, renderer))
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}
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func basePath(base string) string {
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if base == "" || base == "." {
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return "/"
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}
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return base
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}
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func joinBase(base, name string) string {
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if base == "" {
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return "/" + name
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}
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return base + "/" + name
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}
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