rewrite server module

This commit is contained in:
2026-01-16 16:08:10 -05:00
parent bfb5725880
commit 7e3af14059
6 changed files with 437 additions and 8 deletions

120
modules/server/archive.go Normal file
View File

@@ -0,0 +1,120 @@
package server
import (
"fmt"
"net/http"
"os"
"path"
"path/filepath"
"sort"
"strings"
"text/template"
"time"
)
/* this indexes and generate the page for viewing the archive directory */
func generateArchiveIndex(fsPath string, urlPath string) (string, error) {
info, err := os.Stat(fsPath)
if err != nil {
return "", err
}
if !info.IsDir() {
return "", fmt.Errorf("not a directory")
}
ents, err := os.ReadDir(fsPath)
if err != nil {
return "", err
}
type entryInfo struct {
name string
isDir bool
href string
size int64
mod time.Time
}
var list []entryInfo
for _, e := range ents {
n := e.Name()
full := filepath.Join(fsPath, n)
st, err := os.Stat(full)
if err != nil {
continue
}
isd := st.IsDir()
displayName := n
if isd {
displayName = n + "/"
}
href := path.Join(urlPath, n)
if isd && !strings.HasSuffix(href, "/") {
href = href + "/"
}
size := int64(-1)
if !isd {
size = st.Size()
}
list = append(list, entryInfo{name: displayName, isDir: isd, href: href, size: size, mod: st.ModTime()})
}
sort.Slice(list, func(i, j int) bool {
if list[i].isDir != list[j].isDir {
return list[i].isDir
}
return strings.ToLower(list[i].name) < strings.ToLower(list[j].name)
})
urlPath = strings.TrimPrefix(urlPath, "/archive")
var b strings.Builder
b.WriteString("<html>\n<head><title>Index of ")
b.WriteString(template.HTMLEscapeString(urlPath))
b.WriteString("</title></head>\n<body>\n<h1>Index of ")
b.WriteString(template.HTMLEscapeString(urlPath))
b.WriteString("</h1><hr><pre>")
if urlPath != "/" {
b.WriteString(
`<a href="/archive` +
template.HTMLEscapeString(path.Dir(strings.TrimSuffix(urlPath, "/"))) +
`">../</a>` + "\n",
)
} else {
b.WriteString(
`<a href="/">../</a>` + "\n",
)
}
nameCol := 50
for _, ei := range list {
escapedName := template.HTMLEscapeString(ei.name)
dateStr := ei.mod.Local().Format("02-Jan-2006 15:04")
var sizeStr string
if ei.isDir {
sizeStr = "-"
} else {
sizeStr = fmt.Sprintf("%d", ei.size)
}
spaces := 1
if len(escapedName) < nameCol {
spaces = nameCol - len(escapedName)
}
line := `<a href="` + template.HTMLEscapeString(ei.href) + `">` + escapedName + `</a>` + strings.Repeat(" ", spaces) + dateStr + strings.Repeat(" ", 19-len(sizeStr)) + sizeStr + "\n"
b.WriteString(line)
}
b.WriteString("</pre><hr></body>\n</html>")
return b.String(), nil
}
/* helper to read the archive files */
func readArchive(w http.ResponseWriter, route string) error {
fsPath := "." + route
if info, err := os.Stat(fsPath); err == nil && info.IsDir() {
if page, err := generateArchiveIndex(fsPath, route); err == nil {
w.Write([]byte(page))
return nil
} else {
return err
}
}
return nil
}

80
modules/server/dirs.go Normal file
View File

@@ -0,0 +1,80 @@
package server
import (
"fes/modules/ui"
"fmt"
"os"
"path/filepath"
"strings"
)
/* performs relavent handling based on the directory passaed
*
* Special directories
* - www/ <= contains lua routes.
* - static/ <= static content accessable at /static/path or /static/dir/path.
* - include/ <= globally accessable lua functions, cannot directly access "fes" right now.
* - archive/ <= contains user facing files such as archives or dists.
*
*/
func handleDir(entries []os.DirEntry, dir string, routes map[string]string, base string, isStatic bool) error {
for _, entry := range entries {
path := filepath.Join(dir, entry.Name())
if entry.IsDir() {
nextBase := joinBase(base, entry.Name())
subEntries, err := os.ReadDir(path)
if err != nil {
return fmt.Errorf("failed to read directory %s: %w", path, err)
}
if err := handleDir(subEntries, path, routes, nextBase, isStatic); err != nil {
return err
}
continue
}
route := joinBase(base, entry.Name())
if !isStatic && strings.HasSuffix(entry.Name(), ".lua") {
name := strings.TrimSuffix(entry.Name(), ".lua")
if name == "index" {
routes[basePath(base)] = path
routes[route] = path
continue
}
route = joinBase(base, name)
} else if !isStatic && strings.HasSuffix(entry.Name(), ".md") {
name := strings.TrimSuffix(entry.Name(), ".md")
if name == "index" {
routes[basePath(base)] = path
routes[route] = path
continue
}
route = joinBase(base, name)
}
routes[route] = path
}
return nil
}
/* helper to load all special directories */
func loadDirs() map[string]string {
routes := make(map[string]string)
if entries, err := os.ReadDir("www"); err == nil {
if err := handleDir(entries, "www", routes, "", false); err != nil {
ui.Warning("failed to handle www directory", err)
}
}
if entries, err := os.ReadDir("static"); err == nil {
if err := handleDir(entries, "static", routes, "/static", true); err != nil {
ui.Warning("failed to handle static directory", err)
}
}
if entries, err := os.ReadDir("archive"); err == nil {
if err := handleDir(entries, "archive", routes, "/archive", true); err != nil {
ui.Warning("failed to handle archive directory", err)
}
}
return routes
}

View File

@@ -1,6 +1,164 @@
package server package server
/* returns a string of rendered html */ import (
func render(luapath string) (string, error) { "fes/modules/config"
return "", nil "io/fs"
"os"
"path/filepath"
"strings"
lua "github.com/yuin/gopher-lua"
)
/* this is the request data we pass over the bus to the application, via the fes.bus interface */
type reqData struct {
path string
params map[string]string
}
/* returns a string of rendered html */
func render(luapath string, requestData reqData) ([]byte, error) {
L := lua.NewState()
defer L.Close()
if lib, err := fs.ReadDir(config.Lib, "lib"); err == nil {
for _, de := range lib {
if de.IsDir() || !strings.HasSuffix(de.Name(), ".lua") {
continue
}
path := filepath.Join("lib", de.Name())
if data, err := config.Lib.ReadFile(path); err != nil {
continue
} else {
L.DoString(string(data))
}
}
}
preloadLuaModule := func(name, path string) {
L.PreloadModule(name, func(L *lua.LState) int {
fileData, err := config.Lib.ReadFile(path)
if err != nil {
panic(err)
}
if err := L.DoString(string(fileData)); err != nil {
panic(err)
}
L.Push(L.Get(-1))
return 1
})
}
preloadLuaModule("lib.std", "lib/std.lua")
preloadLuaModule("lib.symbol", "lib/symbol.lua")
preloadLuaModule("lib.util", "lib/util.lua")
L.PreloadModule("fes", func(L *lua.LState) int {
mod := L.NewTable()
libModules := []string{}
if ents, err := fs.ReadDir(config.Lib, "lib"); err == nil {
for _, e := range ents {
if e.IsDir() || !strings.HasSuffix(e.Name(), ".lua") {
continue
}
libModules = append(libModules, strings.TrimSuffix(e.Name(), ".lua"))
}
}
for _, modName := range libModules {
path := filepath.Join("lib", modName+".lua")
fileData, err := config.Lib.ReadFile(path)
if err != nil {
continue
}
if err := L.DoString(string(fileData)); err != nil {
continue
}
val := L.Get(-1)
L.Pop(1)
tbl, ok := val.(*lua.LTable)
if !ok || tbl == nil {
tbl = L.NewTable()
}
if modName == "fes" {
tbl.ForEach(func(k, v lua.LValue) { mod.RawSet(k, v) })
} else {
mod.RawSetString(modName, tbl)
}
}
mod.RawSetString("app", func() *lua.LTable {
app := L.NewTable()
includeDir := "include"
includes, err := os.ReadDir(includeDir)
if err != nil {
return app // load no includes
}
for _, de := range includes {
if de.IsDir() || !strings.HasSuffix(de.Name(), ".lua") {
continue
}
base := strings.TrimSuffix(de.Name(), ".lua")
path := filepath.Join(includeDir, de.Name())
if _, err := os.Stat(path); err != nil {
continue
} else if err := L.DoFile(path); err != nil {
continue
}
val := L.Get(-1)
L.Pop(1)
tbl, ok := val.(*lua.LTable)
if !ok || tbl == nil {
tbl = L.NewTable()
}
app.RawSetString(base, tbl)
}
return app
}())
bus := L.NewTable()
bus.RawSetString("url", lua.LString(requestData.path))
params := L.NewTable()
for k, v := range requestData.params {
params.RawSetString(k, lua.LString(v))
}
bus.RawSetString("params", params)
mod.RawSetString("bus", bus)
mod.RawSetString("markdown_to_html", L.NewFunction(func(L *lua.LState) int {
L.Push(lua.LString(markdownToHTML(L.ToString(1))))
return 1
}))
L.Push(mod)
return 1
})
if err := L.DoFile(luapath); err != nil {
return []byte(""), err
}
if L.GetTop() == 0 {
return []byte(""), nil
}
L.SetGlobal("__fes_result", L.Get(-1))
if err := L.DoString("return tostring(__fes_result)"); err != nil {
L.GetGlobal("__fes_result")
if s := L.ToString(-1); s != "" {
return []byte(s), nil
}
return []byte(""), nil
}
if s := L.ToString(-1); s != "" {
return []byte(s), nil
}
return []byte(""), nil
} }

View File

@@ -2,17 +2,74 @@ package server
import ( import (
"fes/modules/config" "fes/modules/config"
"fes/modules/ui"
"fmt" "fmt"
"log" "log"
"net/http" "net/http"
"os"
"path/filepath"
"strings"
) )
var routes map[string]string var routes map[string]string
func Start(dir string) { func Start(dir string) {
http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) { if err := os.Chdir(dir); err != nil {
w.Write([]byte("<h1>Sup bitch</h1>")) ui.Error(fmt.Sprintf("failed to change directory to %s", dir), err)
}) }
log.Fatal(http.ListenAndServe(fmt.Sprintf(":%d", *config.Port), nil)) ui.Log("running root=%s, port=%d.", filepath.Clean(dir), *config.Port)
routes := loadDirs()
http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
route, ok := routes[r.URL.Path]
var err error = nil
/* defer won't update paramaters unless we do this. */
defer func() {
ui.Path(route, err)
}()
if !ok {
err = config.ErrRouteMiss
route = r.URL.Path
if strings.HasPrefix(route, "/archive") {
err = readArchive(w, route)
} else {
w.WriteHeader(http.StatusNotFound)
w.Write([]byte("not found :("))
}
return
}
params := make(map[string]string)
for k, v := range r.URL.Query() {
if len(v) > 0 {
params[k] = v[0]
}
}
var data []byte
if strings.HasSuffix(route, ".lua") {
data, err = render(route, reqData{path: r.URL.Path, params: params})
} else if strings.HasSuffix(route, ".md") {
data, err = os.ReadFile(route)
data = []byte(markdownToHTML(string(data)))
data = []byte("<style>body {max-width: 80ch;}</style>\n" + string(data))
} else {
data, err = os.ReadFile(route)
}
if err != nil {
http.Error(w, fmt.Sprintf("Error loading page: %v", err), http.StatusInternalServerError)
}
w.Write(data)
})
ui.Log("Server initialized")
log.Fatal(http.ListenAndServe(fmt.Sprintf("0.0.0.0:%d", *config.Port), nil))
} }

View File

@@ -15,3 +15,17 @@ func markdownToHTML(mdText string) string {
renderer := html.NewRenderer(opts) renderer := html.NewRenderer(opts)
return string(markdown.Render(doc, renderer)) return string(markdown.Render(doc, renderer))
} }
func basePath(base string) string {
if base == "" || base == "." {
return "/"
}
return base
}
func joinBase(base, name string) string {
if base == "" {
return "/" + name
}
return base + "/" + name
}

View File

@@ -9,7 +9,7 @@ var gitCommit string = "devel"
const PROGRAM_NAME string = "fes" const PROGRAM_NAME string = "fes"
const PROGRAM_NAME_LONG string = "fes/fSD" const PROGRAM_NAME_LONG string = "fes/fSD"
const VERSION string = "0.3.1" const VERSION string = "1.0.0"
func Version() { func Version() {
fmt.Printf("%s version %s\n", PROGRAM_NAME_LONG, VERSION) fmt.Printf("%s version %s\n", PROGRAM_NAME_LONG, VERSION)