147 lines
3.2 KiB
Go
147 lines
3.2 KiB
Go
package contented
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import (
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"encoding/json"
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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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"github.com/boltdb/bolt"
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)
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var SERVER_HEADER string = `contented/0.1`
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type ServerOptions struct {
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DataDirectory string
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DBPath string
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AppTitle string
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MaxUploadBytes int64
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}
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type Server struct {
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opts ServerOptions
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db *bolt.DB
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metadataBucket []byte
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}
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func NewServer(opts *ServerOptions) (*Server, error) {
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s := &Server{
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opts: *opts,
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metadataBucket: []byte(`METADATA`),
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}
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b, err := bolt.Open(opts.DBPath, 0644, bolt.DefaultOptions)
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if err != nil {
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return nil, err
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}
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err = b.Update(func(tx *bolt.Tx) error {
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_, err := tx.CreateBucketIfNotExists(s.metadataBucket)
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return err
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})
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if err != nil {
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return nil, err
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}
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s.db = b
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return s, nil
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}
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func (this *Server) handleView(w http.ResponseWriter, r *http.Request, fileID string) error {
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// Load file
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f, err := os.Open(filepath.Join(this.opts.DataDirectory, fileID))
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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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// Load metadata
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m, err := this.Metadata(fileID)
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if err != nil {
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return err
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}
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// ServeContent only uses the filename to get the mime type, which we can
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// set accurately (including blacklist)
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w.Header().Set(`Content-Type`, m.MimeType)
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if m.MimeType == `application/octet-stream` {
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w.Header().Set(`Content-Disposition`, `attachment; filename="`+m.Filename+`"`)
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}
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http.ServeContent(w, r, "", m.UploadTime, f)
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return nil
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}
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func (this *Server) handleInformation(w http.ResponseWriter, fileID string) {
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m, err := this.Metadata(fileID)
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if err != nil {
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if os.IsNotExist(err) {
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http.Error(w, "Not found", 404)
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return
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}
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log.Println(err.Error())
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http.Error(w, "Internal error", 500)
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return
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}
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jb, err := json.Marshal(m)
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if err != nil {
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log.Println(err.Error())
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http.Error(w, "Internal error", 500)
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return
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}
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w.Header().Set(`Content-Type`, `application/json`)
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w.WriteHeader(200)
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w.Write(jb)
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}
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func (this *Server) ServeHTTP(w http.ResponseWriter, r *http.Request) {
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r.Header.Set(`Server`, SERVER_HEADER)
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if this.opts.MaxUploadBytes > 0 {
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r.Body = http.MaxBytesReader(w, r.Body, this.opts.MaxUploadBytes)
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}
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if r.Method == "GET" && strings.HasPrefix(r.URL.Path, `/view/`) {
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err := this.handleView(w, r, r.URL.Path[6:])
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if err != nil {
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log.Printf("%s View failed: %s\n", r.RemoteAddr, err.Error())
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if os.IsNotExist(err) {
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http.Error(w, "File not found", 404)
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} else {
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http.Error(w, "Couldn't provide content", 500)
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}
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}
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} else if r.Method == "GET" && strings.HasPrefix(r.URL.Path, `/info/`) {
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this.handleInformation(w, r.URL.Path[6:])
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} else if r.Method == "POST" && r.URL.Path == `/upload` {
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mp, mph, err := r.FormFile("f")
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if err != nil {
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log.Printf("%s Invalid request: %s\n", r.RemoteAddr, err.Error())
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http.Error(w, "Invalid request", 400)
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}
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path, err := this.handleUpload(mp, mph, strings.TrimRight(r.RemoteAddr, "0123456789:")) // strip remote-port
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if err != nil {
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log.Printf("%s Upload failed: %s\n", r.RemoteAddr, err.Error())
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http.Error(w, "Upload failed", 500)
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} else {
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http.Redirect(w, r, `/view/`+path, http.StatusFound)
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}
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} else if r.Method == "GET" && r.URL.Path == `/` {
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this.handleHomepage(w)
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} else {
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http.Error(w, "Not found", 404)
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}
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}
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