From 2a4c795d5a165f995e9f7dc84e07465b140f3770 Mon Sep 17 00:00:00 2001 From: Alan Pearce Date: Sat, 27 Apr 2024 21:18:03 +0200 Subject: implement live-reloading dev server Squashed commit of the following: commit 02f077432202af4d633eb2cad81dfdaa6921317f Author: Alan Pearce Date: Sat Apr 27 21:09:14 2024 +0200 builder: only remove output directory if set and in dev mode commit 47001e01c55fa6e74aafeda04ebc3e4e7c47eba0 Author: Alan Pearce Date: Sat Apr 27 21:03:37 2024 +0200 implement live reload on dev server commit 411ec969f61e4b73439f1c54ea29f75135ecc618 Author: Alan Pearce Date: Sat Apr 27 20:59:26 2024 +0200 server: implement graceful shutdown commit 5400132eb6eb1b638e0b3fd4265f51611c92d473 Author: Alan Pearce Date: Sat Apr 27 20:41:07 2024 +0200 add some debug logs commit 3c9b678197c044603950232d222f501ef74d7873 Author: Alan Pearce Date: Sat Apr 27 20:39:09 2024 +0200 prefix log output with executable name commit 300e24c179e390e9d3f5aeab4471c97f17f1fa64 Author: Alan Pearce Date: Sat Apr 27 20:29:42 2024 +0200 don't panic inside internal packages, return error instead commit fe2715d330402ad67fe866471bed89c7238ad2ec Author: Alan Pearce Date: Fri Apr 26 01:18:29 2024 +0200 config: use a table to configure CSP headers commit d012553aaf78a436fa8871830b5d720a9e292d4b Author: Alan Pearce Date: Thu Apr 25 17:13:39 2024 +0200 dev: create basic dev server to build and serve from a temporary directory commit a1d11d3e69650d9b43ca1b1d7b7ccc05a808d5c1 Author: Alan Pearce Date: Thu Apr 25 13:02:22 2024 +0200 remove unused redirect_other_hostnames config option commit fd67b19b5c7f76f0c3579e8a05ef20a618e90be7 Author: Alan Pearce Date: Thu Apr 25 12:58:53 2024 +0200 server: make port a string, which is what go uses commit c798e8e736c0649008cade337158399470a9099b Author: Alan Pearce Date: Thu Apr 25 12:58:33 2024 +0200 config: remove unused port variable commit f94882b9001f3b0855e26b26b4a84b96e3deb22b Author: Alan Pearce Date: Thu Apr 25 12:49:10 2024 +0200 re-organise module layout --- internal/server/filemap.go | 77 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 77 insertions(+) create mode 100644 internal/server/filemap.go (limited to 'internal/server/filemap.go') diff --git a/internal/server/filemap.go b/internal/server/filemap.go new file mode 100644 index 0000000..466db49 --- /dev/null +++ b/internal/server/filemap.go @@ -0,0 +1,77 @@ +package server + +import ( + "fmt" + "hash/fnv" + "io" + "io/fs" + "log" + "log/slog" + "os" + "path/filepath" + "strings" + + "github.com/pkg/errors" +) + +type File struct { + filename string + etag string +} + +var files = map[string]File{} + +func hashFile(filename string) (string, error) { + f, err := os.Open(filename) + if err != nil { + return "", err + } + defer f.Close() + hash := fnv.New64a() + if _, err := io.Copy(hash, f); err != nil { + return "", err + } + return fmt.Sprintf(`W/"%x"`, hash.Sum(nil)), nil +} + +func registerFile(urlpath string, filepath string) error { + if files[urlpath] != (File{}) { + log.Printf("registerFile called with duplicate file, urlPath: %s", urlpath) + return nil + } + hash, err := hashFile(filepath) + if err != nil { + return err + } + files[urlpath] = File{ + filename: filepath, + etag: hash, + } + return nil +} + +func registerContentFiles(root string) error { + err := filepath.WalkDir(root, func(filePath string, f fs.DirEntry, err error) error { + if err != nil { + return errors.WithMessagef(err, "failed to access path %s", filePath) + } + relPath, err := filepath.Rel(root, filePath) + if err != nil { + return errors.WithMessagef(err, "failed to make path relative, path: %s", filePath) + } + urlPath, _ := strings.CutSuffix(relPath, "index.html") + if !f.IsDir() { + slog.Debug("registering file", "urlpath", "/"+urlPath) + return registerFile("/"+urlPath, filePath) + } + return nil + }) + if err != nil { + return err + } + return nil +} + +func GetFile(urlPath string) File { + return files[urlPath] +} -- cgit 1.4.1