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deluge.go
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deluge.go
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// Copyright 2013-2018 Bruno Albuquerque (bga@bug-br.org.br).
//
// Licensed under the Apache License, Version 2.0 (the "License"); you may not
// use this file except in compliance with the License. You may obtain a copy of
// the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
// License for the specific language governing permissions and limitations under
// the License.
// Package deluge implements a Go wrapper around the Deluge Remote JSON API
// (http://deluge.readthedocs.io/en/develop/core/rpc.html). This allows
// programmers to control Deluge (http://deluge-torrent.org) programatically
// from inside Go programs. Note this is a work in progress and not everything
// is implemented but adding extra RPC calls is trivial.
package deluge
import (
"bytes"
"encoding/json"
"fmt"
"io/ioutil"
"net/http"
"sync/atomic"
)
// Deluge represents an endpoint for Deluge RPC requests.
type Deluge struct {
url string
password string
client *http.Client
cookies []*http.Cookie
id uint64
}
// New instantiates a new Deluge instance and authenticates with the
// server.
func New(url, password string) (*Deluge, error) {
d := &Deluge{
url,
password,
new(http.Client),
nil,
0,
}
err := d.authLogin()
if err != nil {
return nil, err
}
return d, err
}
// CoreAddTorrentFile wraps the core.add_torrent_file RPC call. fileName is the
// name of the original torrent file. fileDump is the base64 encoded contents of
// the file and options is a map with options to be set (consult de Deluge
// Torrent documentation for a list of valid options).
func (d *Deluge) CoreAddTorrentFile(fileName, fileDump string,
options map[string]interface{}) (string, error) {
response, err := d.sendJsonRequest("core.add_torrent_file",
[]interface{}{fileName, fileDump, options})
if err != nil {
return "", err
}
return response["result"].(string), nil
}
// CoreAddTorrentMagnet wraps the core.add_torrent_magnet RPC call. magnetUrl is
// the Magnet URL for the torrent and options is a map with options to be set
// (consult de Deluge Torrent documentation for a list of valid options).
func (d *Deluge) CoreAddTorrentMagnet(magnetUrl string,
options map[string]interface{}) (string, error) {
response, err := d.sendJsonRequest("core.add_torrent_magnet",
[]interface{}{magnetUrl, options})
if err != nil {
return "", err
}
return response["result"].(string), nil
}
// CoreAddTorrentUrl wraps the core.add_torrent_url RPC call. torrentUrl is
// the URL for the torrent and options is a map with options to be set
// (consult de Deluge Torrent documentation for a list of valid options).
func (d *Deluge) CoreAddTorrentUrl(torrentUrl string,
options map[string]interface{}) (string, error) {
response, err := d.sendJsonRequest("core.add_torrent_url",
[]interface{}{torrentUrl, options})
if err != nil {
return "", err
}
return response["result"].(string), nil
}
func (d *Deluge) authLogin() error {
response, err := d.sendJsonRequest("auth.login",
[]interface{}{d.password})
if err != nil {
return err
}
if response["result"] != true {
return fmt.Errorf("authetication failed")
}
return nil
}
func (d *Deluge) sendJsonRequest(method string,
params []interface{}) (map[string]interface{}, error) {
atomic.AddUint64(&(d.id), 1)
data, err := json.Marshal(map[string]interface{}{
"method": method,
"id": d.id,
"params": params,
})
if err != nil {
return nil, err
}
req, err := http.NewRequest("POST", d.url, bytes.NewReader(data))
if err != nil {
return nil, err
}
req.Header.Set("Content-Type", "application/json")
if d.cookies != nil {
for _, cookie := range d.cookies {
req.AddCookie(cookie)
}
}
resp, err := d.client.Do(req)
if err != nil {
return nil, err
}
defer resp.Body.Close()
if resp.StatusCode != 200 {
return nil, fmt.Errorf(
"received non-ok status to http request : %d",
resp.StatusCode)
}
d.cookies = resp.Cookies()
body, err := ioutil.ReadAll(resp.Body)
if err != nil {
return nil, err
}
result := make(map[string]interface{})
err = json.Unmarshal(body, &result)
if err != nil {
return nil, err
}
if result["error"] != nil {
return nil, fmt.Errorf("json error : %v", result["error"])
}
return result, nil
}