gosora/routes/attachments.go

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package routes
import (
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"database/sql"
"net/http"
"path/filepath"
"strconv"
"strings"
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c "github.com/Azareal/Gosora/common"
)
var maxAgeYear = "max-age=" + strconv.Itoa(int(c.Year))
func ShowAttachment(w http.ResponseWriter, r *http.Request, u *c.User, filename string) c.RouteError {
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sid, err := strconv.Atoi(r.FormValue("sid"))
if err != nil {
return c.LocalError("The sid is not an integer", w, r, u)
}
sectionTable := r.FormValue("stype")
filename = c.Stripslashes(filename)
if filename == "" {
return c.LocalError("Bad filename", w, r, u)
}
ext := filepath.Ext(filename)
if ext == "" || !c.AllowedFileExts.Contains(strings.TrimPrefix(ext, ".")) {
return c.LocalError("Bad extension", w, r, u)
}
// TODO: Use the same hook table as upstream
hTbl := c.GetHookTable()
skip, rerr := c.H_route_attach_start_hook(hTbl, w, r, u, filename)
if skip || rerr != nil {
return rerr
}
a, err := c.Attachments.GetForRenderRoute(filename, sid, sectionTable)
// ErrCorruptAttachPath is a possibility now
if err == sql.ErrNoRows {
return c.NotFound(w, r, nil)
} else if err != nil {
return c.InternalError(err, w, r)
}
skip, rerr = c.H_route_attach_post_get_hook(hTbl, w, r, u, a)
if skip || rerr != nil {
return rerr
}
if a.SectionTable == "forums" {
_, ferr := c.SimpleForumUserCheck(w, r, u, sid)
if ferr != nil {
return ferr
}
if !u.Perms.ViewTopic {
return c.NoPermissions(w, r, u)
}
} else {
return c.LocalError("Unknown section", w, r, u)
}
if a.OriginTable != "topics" && a.OriginTable != "replies" {
return c.LocalError("Unknown origin", w, r, u)
}
if !u.Loggedin {
w.Header().Set("Cache-Control", maxAgeYear)
} else {
guest := c.GuestUser
_, ferr := c.SimpleForumUserCheck(w, r, &guest, sid)
if ferr != nil {
return ferr
}
h := w.Header()
if guest.Perms.ViewTopic {
h.Set("Cache-Control", maxAgeYear)
} else {
h.Set("Cache-Control", "private")
}
}
// TODO: Fix the problem where non-existent files aren't greeted with custom 404s on ServeFile()'s side
http.ServeFile(w, r, "./attachs/"+filename)
return nil
}
func deleteAttachment(w http.ResponseWriter, r *http.Request, u *c.User, aid int, js bool) c.RouteError {
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e := c.DeleteAttachment(aid)
if e == sql.ErrNoRows {
return c.NotFoundJSQ(w, r, nil, js)
} else if e != nil {
return c.InternalErrorJSQ(e, w, r, js)
}
return nil
}
// TODO: Stop duplicating this code
// TODO: Use a transaction here
// TODO: Move this function to neutral ground
func uploadAttachment(w http.ResponseWriter, r *http.Request, u *c.User, sid int, stable string, oid int, otable, extra string) (pathMap map[string]string, rerr c.RouteError) {
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pathMap = make(map[string]string)
files, rerr := uploadFilesWithHash(w, r, u, "./attachs/")
if rerr != nil {
return nil, rerr
}
for _, filename := range files {
aid, err := c.Attachments.Add(sid, stable, oid, otable, u.ID, filename, extra)
if err != nil {
return nil, c.InternalError(err, w, r)
}
_, ok := pathMap[filename]
if ok {
pathMap[filename] += "," + strconv.Itoa(aid)
} else {
pathMap[filename] = strconv.Itoa(aid)
}
err = c.Attachments.AddLinked(otable, oid)
if err != nil {
return nil, c.InternalError(err, w, r)
}
}
return pathMap, nil
}