Merge branch 'upload-feature'

1 files changed, 211 insertions, 0 deletions

diff --git a/src/rhimportd/uploadWeb.go b/src/rhimportd/uploadWeb.go
new file mode 100644
index 0000000..4b56a43
--- /dev/null
+++ b/src/rhimportd/uploadWeb.go
@@ -0,0 +1,211 @@
+//
+//  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 (
+	"code.helsinki.at/rhrd-go/rddb"
+	"code.helsinki.at/rhrd-go/rhimport"
+	"encoding/json"
+	"io"
+	"io/ioutil"
+	"net/http"
+	"os"
+	"strings"
+	"time"
+)
+
+type webUploadResponseData struct {
+	ResponseCode int    `json:"RESPONSE_CODE"`
+	ErrorString  string `json:"ERROR_STRING"`
+	SourceFile   string `json:"SOURCE_FILE"`
+}
+
+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 webUploadResponse(w http.ResponseWriter, file string) {
+	w.Header().Set("Content-Type", "application/json")
+	w.WriteHeader(http.StatusOK)
+	encoder := json.NewEncoder(w)
+	respdata := webUploadResponseData{http.StatusOK, "success", file}
+	encoder.Encode(respdata)
+}
+
+const (
+	webUploadMaxRequestSize = 2 << 30 // 2GB
+)
+
+func webUploadHandler(conf *rhimport.Config, db *rddb.DBChan, sessions *rhimport.SessionStoreChan, trusted bool, w http.ResponseWriter, r *http.Request) {
+	if r.Method == "GET" {
+		http.Redirect(w, r, "/static/upload-form.html", http.StatusTemporaryRedirect)
+		return
+	}
+
+	if r.Method != "POST" {
+		rhl.Printf("WebUploadHandler: got invalid request method")
+		webUploadErrorResponse(w, http.StatusMethodNotAllowed, "only POST and GET method are allowed")
+		return
+	}
+
+	// This is from: stackoverflow.com/questions/26392196
+	if r.ContentLength > webUploadMaxRequestSize {
+		rhl.Printf("WebUploadHandler: request ist to large: %d > %d", r.ContentLength, webUploadMaxRequestSize)
+		webUploadErrorResponse(w, http.StatusExpectationFailed, "request too large")
+		return
+	}
+	r.Body = http.MaxBytesReader(w, r.Body, webUploadMaxRequestSize)
+	if err := r.ParseMultipartForm(32 << 10); err != nil {
+		rhl.Printf("WebUploadHandler: error while parsing multi-part-form: %v", err)
+		webUploadErrorResponse(w, http.StatusBadRequest, err.Error())
+		return
+	}
+
+	username := r.FormValue("LOGIN_NAME")
+	password := r.FormValue("PASSWORD")
+	if username == "" {
+		webUploadErrorResponse(w, http.StatusBadRequest, "missing field LOGIN_NAME")
+		return
+	}
+	if password == "" {
+		webUploadErrorResponse(w, http.StatusBadRequest, "missing field LOGIN_NAME")
+		return
+	}
+
+	if authenticated, err := db.CheckPassword(username, password); err != nil {
+		rhl.Printf("WebUploadHandler: error checking username/password: %v", err)
+		webUploadErrorResponse(w, http.StatusUnauthorized, err.Error())
+		return
+	} else if !authenticated {
+		rhl.Printf("WebUploadHandler: invalid username/password")
+		webUploadErrorResponse(w, http.StatusUnauthorized, "invalid username/password")
+		return
+	}
+
+	src, hdr, err := r.FormFile("FILENAME")
+	if err != nil {
+		rhdl.Printf("WebUploadHandler: error looking for upload file in form: %s", err)
+		webUploadErrorResponse(w, http.StatusBadRequest, err.Error())
+		return
+	}
+	defer src.Close()
+
+	rhdl.Printf("WebUploadHandler: got request from user '%s', filename='%s'", username, hdr.Filename)
+
+	dstpath, err := ioutil.TempDir(conf.TempDir, "webupload-"+username+"-")
+	if err != nil {
+		rhl.Printf("WebUploadHandler: error creating temporary directory: %v", err)
+		webUploadErrorResponse(w, http.StatusInternalServerError, err.Error())
+		return
+	}
+
+	dstfile := dstpath + "/" + hdr.Filename
+	dst, err := os.OpenFile(dstfile, os.O_WRONLY|os.O_CREATE|os.O_EXCL, 0600)
+	if err != nil {
+		rhl.Printf("WebUploadHandler: Unable to create file '%s': %v", dstfile, err)
+		webUploadErrorResponse(w, http.StatusInternalServerError, err.Error())
+		return
+	}
+	defer dst.Close()
+
+	size, err := io.Copy(dst, src)
+	if err != nil {
+		rhl.Printf("WebUploadHandler: error storing uploaded file '%s': %v", dstfile, err)
+		webUploadErrorResponse(w, http.StatusInternalServerError, err.Error())
+		return
+	}
+	rhl.Printf("WebUploadHandler: stored file '%s' (size: %d Bytes)", dstfile, size)
+	webUploadResponse(w, "tmp://"+strings.TrimPrefix(dstfile, conf.TempDir))
+}
+
+func webUploadCleanerRun(dir *os.File, conf *rhimport.Config, maxAge time.Duration) {
+	t := time.NewTicker(1 * time.Minute)
+	defer t.Stop()
+	for now := range t.C {
+		var err error
+		if _, err = dir.Seek(0, 0); err != nil {
+			rhl.Printf("webUploadCleaner: reading directory contents failed: %s", err)
+			return
+		}
+
+		var entries []os.FileInfo
+		if entries, err = dir.Readdir(0); err != nil {
+			rhl.Printf("webUploadCleaner: reading directory contents failed: %s", err)
+			return
+		}
+
+		for _, entry := range entries {
+			if !strings.HasPrefix(entry.Name(), "webupload-") {
+				continue
+			}
+
+			age := now.Sub(entry.ModTime())
+			if age <= maxAge {
+				continue
+			}
+
+			if err := os.RemoveAll(conf.TempDir + entry.Name()); err != nil {
+				rhl.Printf("webUploadCleaner: deleting dir '%s' failed: %v", entry.Name(), err)
+				continue
+			}
+			rhl.Printf("webUploadCleaner: successfully deleted dir '%s', Age: %v", entry.Name(), age)
+		}
+	}
+}
+
+func webUploadCleaner(conf *rhimport.Config, maxAge time.Duration) {
+	first := true
+	for {
+		if !first {
+			time.Sleep(5 * time.Second)
+		}
+		first = false
+
+		dir, err := os.Open(conf.TempDir)
+		if err != nil {
+			rhl.Printf("webUploadCleaner: %s", err)
+			continue
+		}
+		if i, err := dir.Stat(); err != nil {
+			rhl.Printf("webUploadCleaner: %s", err)
+			dir.Close()
+			continue
+		} else {
+			if !i.IsDir() {
+				rhl.Printf("webUploadCleaner: %s is not a directory", conf.TempDir)
+				dir.Close()
+				continue
+			}
+		}
+		rhdl.Printf("webUploadCleaner: running with max age: %v", maxAge)
+		webUploadCleanerRun(dir, conf, maxAge)
+		rhdl.Printf("webUploadCleanerRun: returned - restring in 5 sec...")
+		dir.Close()
+	}
+}