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//
// rhimportd
//
// The Radio Helsinki Rivendell Import Daemon
//
//
// Copyright (C) 2015-2016 Christian Pointner <equinox@helsinki.at>
//
// This file is part of rhimportd.
//
// rhimportd 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.
//
// rhimportd 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 rhimportd. If not, see <http://www.gnu.org/licenses/>.
//
package main
import (
"crypto/sha256"
"encoding/hex"
"encoding/json"
"io"
"net/http"
"strings"
"code.helsinki.at/rhrd-go/rddb"
"code.helsinki.at/rhrd-go/rhimport"
)
type webUploadResponseData struct {
ResponseCode int `json:"RESPONSE_CODE"`
ErrorString string `json:"ERROR_STRING"`
}
func webUploadErrorResponse(w http.ResponseWriter, code int, errStr string) {
w.Header().Set("Content-Type", "application/json")
w.WriteHeader(code)
encoder := json.NewEncoder(w)
respdata := webUploadResponseData{code, errStr}
encoder.Encode(respdata)
}
func webUploadSuccessResponse(w http.ResponseWriter) {
w.Header().Set("Content-Type", "application/json")
w.WriteHeader(http.StatusOK)
encoder := json.NewEncoder(w)
respdata := webUploadResponseData{http.StatusOK, "success"}
encoder.Encode(respdata)
}
func webUploadHandler(conf *rhimport.Config, db *rddb.DB, sessions *rhimport.SessionStore, trusted bool, w http.ResponseWriter, r *http.Request) {
rhdl.Printf("WebUploadHandler: %s requests '%s'", r.RemoteAddr, r.URL.String())
if r.Method != "POST" {
rhl.Printf("WebUploadHandler: got invalid request method")
webUploadErrorResponse(w, http.StatusMethodNotAllowed, "only POST method is allowed")
return
}
parts := strings.SplitN(r.URL.String(), "/", 2)
if len(parts) != 2 {
rhl.Printf("WebUploadHandler: got invalid request url")
webUploadErrorResponse(w, http.StatusBadRequest, "invalid request URL, should be <username>/<sessionid>")
return
}
username := parts[0]
sessionid := parts[1]
s, _, code, _ := sessions.Get(username, sessionid)
if code != http.StatusOK {
rhl.Printf("WebUploadHandler: refusing file upload for '%s/%s': session not found", username, sessionid)
webUploadErrorResponse(w, http.StatusUnauthorized, "session not found")
return
}
cancel, attachmentChan := s.AttachUploader()
if attachmentChan == nil || cancel == nil {
rhl.Printf("WebUploadHandler: refusing file upload for '%s/%s': session already uploading", username, sessionid)
webUploadErrorResponse(w, http.StatusForbidden, "upload already in progress")
return
}
defer close(attachmentChan)
rhl.Printf("WebUploadHandler: starting file upload for '%s/%s' (ContentLength: %d)", username, sessionid, r.ContentLength)
sizeTotal := uint64(0)
hash := sha256.New()
body := io.TeeReader(r.Body, hash)
for {
chunk := rhimport.AttachmentChunk{}
var data [128 * 1024]byte
n, err := body.Read(data[:])
if n > 0 {
sizeTotal += uint64(n)
chunk.Data = data[:n]
if err == io.EOF {
err = nil
}
}
chunk.Error = err
if err == io.EOF {
hashStr := hex.EncodeToString(hash.Sum(nil))
rhl.Printf("WebUploadHandler: file upload for '%s/%s' finished (%d bytes, SHA256: %s)", username, sessionid, sizeTotal, hashStr)
webUploadSuccessResponse(w)
return
}
select {
case <-cancel:
rhl.Printf("WebUploadHandler: file upload for '%s/%s' got canceld after %d bytes", username, sessionid, sizeTotal)
webUploadErrorResponse(w, http.StatusNoContent, "canceled")
return
case attachmentChan <- chunk:
}
if err != nil {
webUploadErrorResponse(w, http.StatusInternalServerError, err.Error())
return
}
}
}
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