Commit of all existing code.

app/cmd/cmd.go

@@ -0,0 +1,11 @@
+package cmd
+
+import "github.com/urfave/cli/v2"
+
+func intFlag(name string, value int, usage string) *cli.IntFlag {
+	return &cli.IntFlag{
+		Name:  name,
+		Value: value,
+		Usage: usage,
+	}
+}

app/cmd/serve.go

@@ -0,0 +1,38 @@
+package cmd
+
+import (
+	"frostfire.io/dir2opdspse/app/routes"
+	"github.com/gorilla/mux"
+	"github.com/urfave/cli/v2"
+	"net/http"
+	"strconv"
+	"time"
+)
+
+var Serve = cli.Command{
+	Name:        "serve",
+	Usage:       "Starts the webserver",
+	Description: "Start the Flux webserver. That's all you need to run.",
+	Action:      runServe,
+	Flags: []cli.Flag{
+		intFlag("port, p", 3000, "Web server port"),
+	},
+}
+
+func runServe(c *cli.Context) error {
+	r := mux.NewRouter()
+
+	fs := http.FileServer(http.Dir("books/"))
+	r.PathPrefix("/manga/").Handler(http.StripPrefix("/manga", fs))
+
+	routes.Init(c, r)
+
+	srv := &http.Server{
+		Handler:      r,
+		Addr:         ":" + strconv.Itoa(c.Int("port")),
+		WriteTimeout: 15 * time.Second,
+		ReadTimeout:  15 * time.Second,
+	}
+
+	return srv.ListenAndServe()
+}

app/opds/author_builder.go

@@ -0,0 +1,31 @@
+package opds
+
+import (
+	"github.com/lann/builder"
+	"golang.org/x/tools/blog/atom"
+)
+
+type authorBuilder builder.Builder
+
+func (a authorBuilder) Name(name string) authorBuilder {
+	return builder.Set(a, "Name", name).(authorBuilder)
+}
+
+func (a authorBuilder) URI(uri string) authorBuilder {
+	return builder.Set(a, "URI", uri).(authorBuilder)
+}
+
+func (a authorBuilder) Email(email string) authorBuilder {
+	return builder.Set(a, "Email", email).(authorBuilder)
+}
+
+func (a authorBuilder) InnerXML(inner string) authorBuilder {
+	return builder.Set(a, "InnerXML", inner).(authorBuilder)
+}
+
+func (a authorBuilder) Build() atom.Person {
+	return builder.GetStruct(a).(atom.Person)
+}
+
+// AuthorBuilder is a fluent immutable builder to build OPDS Authors
+var AuthorBuilder = builder.Register(authorBuilder{}, atom.Person{}).(authorBuilder)

app/opds/entry_builder.go

@@ -0,0 +1,49 @@
+package opds
+
+import (
+	"time"
+
+	"github.com/lann/builder"
+	"golang.org/x/tools/blog/atom"
+)
+
+type entryBuilder builder.Builder
+
+func (e entryBuilder) Title(title string) entryBuilder {
+	return builder.Set(e, "Title", title).(entryBuilder)
+}
+
+func (e entryBuilder) ID(id string) entryBuilder {
+	return builder.Set(e, "ID", id).(entryBuilder)
+}
+
+func (e entryBuilder) AddLink(link atom.Link) entryBuilder {
+	return builder.Append(e, "Link", link).(entryBuilder)
+}
+
+func (e entryBuilder) Published(published time.Time) entryBuilder {
+	return builder.Set(e, "Published", atom.Time(published)).(entryBuilder)
+}
+
+func (e entryBuilder) Updated(updated time.Time) entryBuilder {
+	return builder.Set(e, "Updated", atom.Time(updated)).(entryBuilder)
+}
+
+func (e entryBuilder) Author(author *atom.Person) entryBuilder {
+	return builder.Set(e, "Author", author).(entryBuilder)
+}
+
+func (e entryBuilder) Summary(summary *atom.Text) entryBuilder {
+	return builder.Set(e, "Summary", summary).(entryBuilder)
+}
+
+func (e entryBuilder) Content(content *atom.Text) entryBuilder {
+	return builder.Set(e, "Content", content).(entryBuilder)
+}
+
+func (e entryBuilder) Build() atom.Entry {
+	return builder.GetStruct(e).(atom.Entry)
+}
+
+// EntryBuilder is a fluent immutable builder to build OPDS entries
+var EntryBuilder = builder.Register(entryBuilder{}, atom.Entry{}).(entryBuilder)

app/opds/feed_builder.go

@@ -0,0 +1,47 @@
+package opds
+
+import (
+	"time"
+
+	"github.com/lann/builder"
+	"golang.org/x/tools/blog/atom"
+)
+
+type AcquisitionFeed struct {
+	*atom.Feed
+	Dc   string `xml:"xmlns:dc,attr"`
+	Opds string `xml:"xmlns:opds,attr"`
+}
+
+type feedBuilder builder.Builder
+
+func (f feedBuilder) Title(title string) feedBuilder {
+	return builder.Set(f, "Title", title).(feedBuilder)
+}
+
+func (f feedBuilder) ID(id string) feedBuilder {
+	return builder.Set(f, "ID", id).(feedBuilder)
+}
+
+func (f feedBuilder) AddLink(link atom.Link) feedBuilder {
+	return builder.Append(f, "Link", link).(feedBuilder)
+}
+
+func (f feedBuilder) Updated(updated time.Time) feedBuilder {
+	return builder.Set(f, "Updated", atom.Time(updated)).(feedBuilder)
+}
+
+func (f feedBuilder) Author(author atom.Person) feedBuilder {
+	return builder.Set(f, "Author", &author).(feedBuilder)
+}
+
+func (f feedBuilder) AddEntry(entry atom.Entry) feedBuilder {
+	return builder.Append(f, "Entry", &entry).(feedBuilder)
+}
+
+func (f feedBuilder) Build() atom.Feed {
+	return builder.GetStruct(f).(atom.Feed)
+}
+
+// FeedBuilder is a fluent immutable builder to build OPDS Feeds
+var FeedBuilder = builder.Register(feedBuilder{}, atom.Feed{}).(feedBuilder)

app/opds/link_builder.go

@@ -0,0 +1,43 @@
+package opds
+
+import (
+	"github.com/lann/builder"
+	"golang.org/x/tools/blog/atom"
+)
+
+type linkBuilder builder.Builder
+
+func (l linkBuilder) Rel(rel string) linkBuilder {
+	return builder.Set(l, "Rel", rel).(linkBuilder)
+}
+
+func (l linkBuilder) Href(href string) linkBuilder {
+	return builder.Set(l, "Href", href).(linkBuilder)
+}
+
+func (l linkBuilder) Type(typeName string) linkBuilder {
+	return builder.Set(l, "Type", typeName).(linkBuilder)
+}
+
+func (l linkBuilder) HrefLang(lang string) linkBuilder {
+	return builder.Set(l, "HrefLang", lang).(linkBuilder)
+}
+
+func (l linkBuilder) Title(title string) linkBuilder {
+	return builder.Set(l, "Title", title).(linkBuilder)
+}
+
+func (l linkBuilder) Length(length uint) linkBuilder {
+	return builder.Set(l, "Length", length).(linkBuilder)
+}
+
+func (l linkBuilder) PseCount(count uint) linkBuilder {
+	return builder.Set(l, "PseCount", count).(linkBuilder)
+}
+
+func (l linkBuilder) Build() atom.Link {
+	return builder.GetStruct(l).(atom.Link)
+}
+
+// LinkBuilder is a fluent immutable builder to build OPDS Links
+var LinkBuilder = builder.Register(linkBuilder{}, atom.Link{}).(linkBuilder)

app/opds/text_builder.go

@@ -0,0 +1,23 @@
+package opds
+
+import (
+	"github.com/lann/builder"
+	"golang.org/x/tools/blog/atom"
+)
+
+type textBuilder builder.Builder
+
+func (t textBuilder) Type(textType string) textBuilder {
+	return builder.Set(t, "Type", textType).(textBuilder)
+}
+
+func (t textBuilder) Body(body string) textBuilder {
+	return builder.Set(t, "Body", body).(textBuilder)
+}
+
+func (t textBuilder) Build() atom.Text {
+	return builder.GetStruct(t).(atom.Text)
+}
+
+// TextBuilder is a fluent immutable builder to build OPDS texts
+var TextBuilder = builder.Register(textBuilder{}, atom.Text{}).(textBuilder)

app/routes/routes.go

@@ -0,0 +1,126 @@
+package routes
+
+import (
+	"archive/zip"
+	"bytes"
+	"encoding/json"
+	"encoding/xml"
+	"errors"
+	"frostfire.io/dir2opdspse/app/opds"
+	"frostfire.io/dir2opdspse/app/utils"
+	"github.com/gorilla/mux"
+	"github.com/urfave/cli/v2"
+	"io"
+	"log"
+	"net/http"
+	"os"
+	"path"
+	"regexp"
+	"slices"
+	"strconv"
+	"time"
+)
+
+func Init(c *cli.Context, r *mux.Router) {
+	r.HandleFunc("/", Home).Methods("GET")
+	r.HandleFunc("/stream/{manga}/{page}", Stream).Methods("GET")
+	r.HandleFunc("/test/{path:.*}/{page}", Test).Methods("GET")
+}
+
+func Home(w http.ResponseWriter, r *http.Request) {
+	feed := opds.FeedBuilder.
+		ID("dir2opds").
+		Title("dir2OPDS").
+		Updated(time.Now()).
+		AddLink(opds.LinkBuilder.
+			Rel("start").
+			Href("/").
+			Type("application/atom+xml;profile=opds-catalog;kind=navigation").
+			Build())
+
+	dirEntries, _ := os.ReadDir("books")
+	for _, entry := range dirEntries {
+		if !entry.IsDir() {
+			zFile, _ := zip.OpenReader(path.Join("books", entry.Name()))
+			//zCount := len(zFile.File)
+			_ = zFile.Close()
+
+			feed = feed.AddEntry(opds.EntryBuilder.
+				ID(utils.FileBasename(entry.Name())).
+				Title(utils.FileBasename(entry.Name())).
+				AddLink(opds.LinkBuilder.
+					Rel("http://opds-spec.org/acquisition").
+					Href("/manga/" + entry.Name()).
+					Type("application/x-cbz").
+					Title(utils.FileBasename(entry.Name())).
+					Build()).
+				AddLink(opds.LinkBuilder.
+					Rel("http://opds-spec.org/image").
+					Href("/stream/" + entry.Name() + "/0").
+					Type("image/png").
+					Build()).
+				AddLink(opds.LinkBuilder.
+					Rel("http://opds-spec.org/image/thumbnail").
+					Href("/stream/" + entry.Name() + "/0").
+					Type("image/png").
+					Build()).
+				AddLink(opds.LinkBuilder.
+					Rel("http://vaemendis.net/opds-pse/stream").
+					Href("/stream/" + entry.Name() + "/{pageNumber}").
+					Type("image/png").
+					//PseCount(10).
+					Build()).
+				Build())
+		}
+	}
+	data, err := xml.MarshalIndent(feed.Build(), "", "  ")
+	if err != nil {
+		panic(err)
+	}
+	http.ServeContent(w, r, "feed.xml", time.Now(), bytes.NewReader(data))
+}
+
+func Stream(w http.ResponseWriter, r *http.Request) {
+	re := regexp.MustCompile(`(\d+)(.*)`)
+	vars := mux.Vars(r)
+	if len(re.FindStringIndex(vars["page"])) <= 0 {
+		w.WriteHeader(404)
+		return
+	}
+
+	pageNumber := re.FindStringSubmatch(vars["page"])[1]
+
+	mangaPath := path.Join("books", vars["manga"])
+
+	if _, err := os.Stat(mangaPath); errors.Is(err, os.ErrNotExist) {
+		w.WriteHeader(404)
+		return
+	}
+
+	zf, err := zip.OpenReader(mangaPath)
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	pageIndex := slices.IndexFunc(zf.File, func(f *zip.File) bool {
+		page, _ := strconv.Atoi(pageNumber)
+		return f.Name == (strconv.Itoa(page+1) + ".png")
+	})
+
+	if pageIndex == -1 {
+		w.WriteHeader(404)
+		return
+	}
+
+	imf, _ := zf.File[pageIndex].Open()
+	imageBytes, _ := io.ReadAll(imf)
+	_ = imf.Close()
+	_ = zf.Close()
+
+	http.ServeContent(w, r, zf.File[0].Name, time.Now(), bytes.NewReader(imageBytes))
+}
+
+func Test(w http.ResponseWriter, r *http.Request) {
+	data, _ := json.MarshalIndent(r.URL, "", "  ")
+	http.ServeContent(w, r, "data.json", time.Now(), bytes.NewReader(data))
+}

app/utils/utils.go

@@ -0,0 +1,10 @@
+package utils
+
+import (
+	"path/filepath"
+	"strings"
+)
+
+func FileBasename(path string) string {
+	return strings.TrimSuffix(filepath.Base(path), filepath.Ext(path))
+}