acquisition is better handled
This commit is contained in:
Sinuhe Tellez
parent
0337cff931
commit
79ce7b3c5b
1
.gitignore
vendored
1
.gitignore
vendored
@ -6,6 +6,7 @@
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# Folders
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_obj
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_test
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.idea
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# Architecture specific extensions/prefixes
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*.[568vq]
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262
main.go
262
main.go
@ -18,39 +18,181 @@
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package main
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import (
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"bufio"
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"encoding/xml"
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"encoding/base64"
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"flag"
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"io"
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"io/ioutil"
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"log"
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"mime"
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"net/http"
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"net/url"
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"os"
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"path"
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"path/filepath"
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"time"
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"golang.org/x/tools/blog/atom"
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"net/url"
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"time"
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)
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var dirRoot string
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type AcquisitionFeed struct {
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*atom.Feed
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Dc string `xml:"xmlns:dc,attr"`
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Opds string `xml:"xmlns:opds,attr"`
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}
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type CatalogFeed atom.Feed
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var (
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port,
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dirRoot,
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author,
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authorUri,
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authorEmail string
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updated atom.TimeStr
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)
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func init() {
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mime.AddExtensionType(".mobi", "application/x-mobipocket-ebook")
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mime.AddExtensionType(".epub", "application/epub+zip")
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mime.AddExtensionType(".fb2", "txt/xml")
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http.HandleFunc("/", errorHandler(catalogRoot))
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flag.StringVar(&port, "port", "8080", "The server will listen in this port")
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flag.StringVar(&dirRoot, "dir", "./books", "A directory with books")
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flag.StringVar(&author, "author", "", "The author of the feed")
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flag.StringVar(&authorUri, "uri", "", "The author uri")
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flag.StringVar(&authorEmail, "email", "", "The author email")
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flag.Parse()
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updated = atom.Time(time.Now())
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}
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func main() {
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portPtr := flag.String("port", "8080", "The server will listen in this port")
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dirPtr := flag.String("dir", "./books", "A directory with books")
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flag.Parse()
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http.HandleFunc("/", errorHandler(func(w http.ResponseWriter, req *http.Request) error {
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dirPath := filepath.Join(dirRoot, req.URL.Path)
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fi, err := os.Stat(dirPath)
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if err != nil {
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return err
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}
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dirRoot = *dirPtr
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log.Fatal(http.ListenAndServe(":"+*portPtr, nil))
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if fi.IsDir() {
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w.Write([]byte(xml.Header))
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return writeFeedTo(w, req.URL)
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}
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return writeFileTo(w, dirPath)
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}))
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log.Fatal(http.ListenAndServe(":"+port, nil))
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}
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func writeFeedTo(w io.Writer, u *url.URL) error {
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isAcquisition, err := isAcquisitionFeed(filepath.Join(dirRoot, u.Path))
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if err != nil {
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return err
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}
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if isAcquisition {
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return writeAcquisitionFeed(w, u)
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}
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return writeCatalogFeed(w, u)
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}
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func isAcquisitionFeed(p string) (bool, error) {
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fis, err := ioutil.ReadDir(p)
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if err != nil {
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return false, err
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}
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for _, fi := range fis {
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if !fi.IsDir() {
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return true, nil
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}
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}
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return false, nil
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}
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func writeCatalogFeed(w io.Writer, u *url.URL) error {
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//TODO: Do I am root
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feed := &CatalogFeed{ID: u.Path, Title: "Catalog feed in " + u.Path}
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feed.Author = &atom.Person{Name: author, Email: authorEmail, URI: authorUri}
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feed.Updated = updated
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abs_path := filepath.Join(dirRoot, u.Path)
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fis, err := ioutil.ReadDir(abs_path)
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if err != nil {
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return err
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}
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for _, fi := range fis {
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link := atom.Link{
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Rel:"subsection",
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Title: fi.Name(),
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Href: filepath.Join(u.EscapedPath(), url.PathEscape(fi.Name())),
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Type:"application/atom+xml;profile=opds-catalog;kind=acquisition",
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}
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entry := &atom.Entry{
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ID: filepath.Join(u.Path, fi.Name()),
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Title: fi.Name(),
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Updated: updated,
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Link: []atom.Link{link},
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}
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feed.Entry = append(feed.Entry, entry)
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}
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enc := xml.NewEncoder(w)
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enc.Indent(" ", " ")
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enc.Encode(feed)
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return nil
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}
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func writeAcquisitionFeed(w io.Writer, u *url.URL) error {
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f := &atom.Feed{}
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feed := &AcquisitionFeed{f, "http://purl.org/dc/terms/", "http://opds-spec.org/2010/catalog"}
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feed.ID = u.Path
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feed.Updated = updated
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feed.Title = filepath.Base(u.Path)
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feed.Author = &atom.Person{Name: author, Email: authorEmail, URI: authorUri}
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abs_path := filepath.Join(dirRoot, u.Path)
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fis, err := ioutil.ReadDir(abs_path)
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if err != nil {
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return err
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}
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entry := &atom.Entry{
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ID: u.Path,
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Title: filepath.Base(u.Path),
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Updated: updated,
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}
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for _, fi := range fis {
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ext := filepath.Ext(fi.Name())
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mime_type :=mime.TypeByExtension(ext)
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var rel string
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if rel="http://opds-spec.org/acquisition"; ext == ".png" || ext == ".jpg" || ext == ".jpeg" || ext == ".gift" {
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rel="http://opds-spec.org/image/thumbnail"
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}
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link := atom.Link{
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Rel: rel,
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Type: mime_type,
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Href:filepath.Join(u.EscapedPath(), url.PathEscape(fi.Name())),
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}
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entry.Link = append(entry.Link, link)
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}
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feed.Entry = append(feed.Entry, entry)
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enc := xml.NewEncoder(w)
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enc.Indent(" ", " ")
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enc.Encode(feed)
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return nil
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return nil
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}
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func writeFileTo(w io.Writer, filepath string) error {
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f, err := os.Open(filepath)
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if err != nil {
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return err
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}
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defer f.Close()
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r := bufio.NewReader(f)
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r.WriteTo(w)
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return nil
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}
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func errorHandler(f func(http.ResponseWriter, *http.Request) error) http.HandlerFunc {
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@ -62,101 +204,3 @@ func errorHandler(f func(http.ResponseWriter, *http.Request) error) http.Handler
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}
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}
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}
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func catalogRoot(w http.ResponseWriter, req *http.Request) error {
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dirPath := filepath.Join(dirRoot, req.URL.Path)
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fi, err := os.Stat(dirPath)
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if err != nil {
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return err
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}
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if fi.IsDir() {
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return catalogFeed(w, req, dirPath, fi.ModTime())
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}
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return writeFileTo(w, dirPath)
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}
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func catalogFeed(w io.Writer, r *http.Request, dirPath string, updatedTime time.Time) error {
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fis, err := ioutil.ReadDir(dirPath)
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if err != nil {
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return err
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}
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feed := &atom.Feed{Title: "OPDS Catalog: " + r.URL.Path}
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feed.ID = base64.StdEncoding.EncodeToString([]byte(r.URL.EscapedPath()))
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feed.Updated = atom.Time(updatedTime)
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if len(fis) < 1 {
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return writeFeedTo(w, feed)
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}
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err = FeedEntries(feed, fis, r)
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if err != nil {
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return err
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}
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return writeFeedTo(w, feed)
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}
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func FeedEntries(f *atom.Feed, fis []os.FileInfo, r *http.Request) error {
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for _, fi := range fis {
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e := &atom.Entry{Title: fi.Name()}
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e.ID = base64.StdEncoding.EncodeToString([]byte(path.Join(r.URL.EscapedPath(), url.PathEscape(fi.Name()))))
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e.Updated = atom.Time(fi.ModTime())
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l := atom.Link{Title: fi.Name(), Href: path.Join(r.URL.EscapedPath(), url.PathEscape(fi.Name()))}
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if !fi.IsDir() {
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l.Rel = "http://opds-spec.org/acquisition"
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}
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lType, err := getLinkType(path.Join(dirRoot, r.URL.Path, fi.Name()))
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if err != nil {
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return err
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}
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l.Type = lType
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e.Link = append(e.Link, l)
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f.Entry = append(f.Entry, e)
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}
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return nil
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}
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func writeFeedTo(w io.Writer, feed *atom.Feed) error {
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io.WriteString(w, "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n")
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enc := xml.NewEncoder(w)
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enc.Indent(" ", " ")
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if err := enc.Encode(feed); err != nil {
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return err
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}
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return nil
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}
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func writeFileTo(w io.Writer, filepath string) error {
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f, err := os.Open(filepath)
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if err != nil {
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return err
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}
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_, err = io.Copy(w, f)
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if err != nil {
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f.Close()
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return err
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}
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f.Close()
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return nil
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}
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func getLinkType(lPath string) (string, error) {
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fi, err := os.Stat(lPath)
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if err != nil {
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return "", err
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}
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if !fi.IsDir() {
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return mime.TypeByExtension(filepath.Ext(lPath)), nil
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}
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fis, err := ioutil.ReadDir(lPath)
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if err != nil {
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return "", err
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}
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for _, fi := range fis {
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if !fi.IsDir() {
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return "application/atom+xml;profile=opds-catalog;kind=acquisition", nil
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}
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}
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return "application/atom+xml;profile=opds-catalog;kind=navigation", nil
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}
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