forked from andreimarcu/linx-server
/
display.go
119 lines (99 loc) · 2.85 KB
/
display.go
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package main
import (
"encoding/json"
"io/ioutil"
"net/http"
"os"
"path"
"path/filepath"
"strconv"
"strings"
"time"
"github.com/dustin/go-humanize"
"github.com/flosch/pongo2"
"github.com/microcosm-cc/bluemonday"
"github.com/russross/blackfriday"
"github.com/zenazn/goji/web"
)
const maxDisplayFileSizeBytes = 1024 * 512
func fileDisplayHandler(c web.C, w http.ResponseWriter, r *http.Request) {
fileName := c.URLParams["name"]
filePath := path.Join(Config.filesDir, fileName)
err := checkFile(fileName)
if err == NotFoundErr {
notFoundHandler(c, w, r)
return
}
metadata, err := metadataRead(fileName)
if err != nil {
oopsHandler(c, w, r, RespAUTO, "Corrupt metadata.")
return
}
var expiryHuman string
if metadata.Expiry != neverExpire {
expiryHuman = humanize.RelTime(time.Now(), metadata.Expiry, "", "")
}
sizeHuman := humanize.Bytes(uint64(metadata.Size))
extra := make(map[string]string)
file, _ := os.Open(filePath)
defer file.Close()
header := make([]byte, 512)
file.Read(header)
extension := strings.TrimPrefix(filepath.Ext(fileName), ".")
if strings.EqualFold("application/json", r.Header.Get("Accept")) {
js, _ := json.Marshal(map[string]string{
"filename": fileName,
"expiry": strconv.FormatInt(metadata.Expiry.Unix(), 10),
"size": strconv.FormatInt(metadata.Size, 10),
"mimetype": metadata.Mimetype,
"sha256sum": metadata.Sha256sum,
})
w.Write(js)
return
}
var tpl *pongo2.Template
if strings.HasPrefix(metadata.Mimetype, "image/") {
tpl = Templates["display/image.html"]
} else if strings.HasPrefix(metadata.Mimetype, "video/") {
tpl = Templates["display/video.html"]
} else if strings.HasPrefix(metadata.Mimetype, "audio/") {
tpl = Templates["display/audio.html"]
} else if metadata.Mimetype == "application/pdf" {
tpl = Templates["display/pdf.html"]
} else if supportedBinExtension(extension) {
if metadata.Size < maxDisplayFileSizeBytes {
bytes, err := ioutil.ReadFile(filePath)
if err == nil {
extra["extension"] = extension
extra["lang_hl"], extra["lang_ace"] = extensionToHlAndAceLangs(extension)
extra["contents"] = string(bytes)
tpl = Templates["display/bin.html"]
}
}
} else if extension == "md" {
if metadata.Size < maxDisplayFileSizeBytes {
bytes, err := ioutil.ReadFile(filePath)
if err == nil {
unsafe := blackfriday.MarkdownCommon(bytes)
html := bluemonday.UGCPolicy().SanitizeBytes(unsafe)
extra["contents"] = string(html)
tpl = Templates["display/md.html"]
}
}
}
// Catch other files
if tpl == nil {
tpl = Templates["display/file.html"]
}
err = tpl.ExecuteWriter(pongo2.Context{
"mime": metadata.Mimetype,
"filename": fileName,
"size": sizeHuman,
"expiry": expiryHuman,
"extra": extra,
"files": metadata.ArchiveFiles,
}, w)
if err != nil {
oopsHandler(c, w, r, RespHTML, "")
}
}