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fetch.go
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fetch.go
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package controllers
//
// GangGo Application Server
// Copyright (C) 2017 Lukas Matt <lukas@zauberstuhl.de>
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
//
import (
"net/http"
"github.com/revel/revel"
"git.feneas.org/ganggo/ganggo/app/models"
"git.feneas.org/ganggo/ganggo/app/helpers"
fhelpers "git.feneas.org/ganggo/federation/helpers"
"git.feneas.org/ganggo/federation"
"strings"
)
type Fetch struct {
*revel.Controller
}
type RenderBytes []byte
func (b RenderBytes) Apply(req *revel.Request, resp *revel.Response) {
resp.WriteHeader(http.StatusOK, "application/magic-envelope+xml")
resp.GetWriter().Write(b)
}
func (f Fetch) Index(shareable, guid string) revel.Result {
var payload []byte
switch {
case strings.EqualFold(shareable, models.ShareablePost):
fallthrough
// XXX hard-coded status message type
case strings.EqualFold(shareable, "status_message"):
var post models.Post
err := post.FindByGuid(guid)
if err != nil {
f.Log.Debug("Fetch post error", "err", err)
return f.NotFound(err.Error())
}
if !post.Public {
// only public entities should be fetchable
return f.NotFound("record not found")
}
if user, ok := post.IsLocal(); ok {
privKey, err := fhelpers.ParseRSAPrivateKey(
[]byte(user.SerializedPrivateKey))
if err != nil {
f.Log.Error("Fetch parse key error", "err", err)
return f.NotFound("record not found")
}
entity, err := federation.NewMessagePost(federation.DiasporaProtocol)
if err != nil {
f.Log.Error("Fetch message error", "err", err)
return f.NotFound("record not found")
}
entity.SetText(post.Text)
entity.SetAuthor(post.Person.Author)
entity.SetGuid(post.Guid)
entity.SetProvider(post.ProviderName)
entity.SetPublic(post.Public)
entity.SetCreatedAt(post.CreatedAt)
payload, err = entity.Marshal(privKey, nil)
if err != nil {
f.Log.Error("Fetch magic envelope error", "err", err)
return f.RenderError(err)
}
} else {
host, err := helpers.ParseHost(post.Person.Author)
if err != nil {
f.Log.Error("Fetch parse author error", "err", err)
return f.RenderError(err)
}
return f.Redirect("http://%s/fetch/%s/%s", host, shareable, guid)
}
default:
return f.NotFound("not supported type")
}
return RenderBytes(payload)
}