1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
|
// Copyright (C) 2015, The Duplicati Team
// http://www.duplicati.com, info@duplicati.com
//
// This library is free software; you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as
// published by the Free Software Foundation; either version 2.1 of the
// License, or (at your option) any later version.
//
// This library 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
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
using System;
using System.Net;
using System.Text;
using Newtonsoft.Json;
using Duplicati.Library.Utility;
namespace Duplicati.Library.Backend.Backblaze
{
public class B2AuthHelper : JSONWebHelper
{
private readonly string m_credentials;
private AuthResponse m_config;
private DateTime m_configExpires;
private const string AUTH_URL = "https://api.backblazeb2.com/b2api/v1/b2_authorize_account";
public B2AuthHelper(string userid, string password)
: base()
{
m_credentials = Convert.ToBase64String(Encoding.UTF8.GetBytes(userid + ":" + password));
}
public override HttpWebRequest CreateRequest(string url, string method = null)
{
var r = base.CreateRequest(url, method);
r.Headers["Authorization"] = AuthorizationToken;
return r;
}
public string AuthorizationToken { get { return Config.AuthorizationToken; } }
public string APIUrl { get { return Config.APIUrl; } }
public string DownloadUrl { get { return Config.DownloadUrl; } }
public string AccountID { get { return Config.AccountID; } }
private string DropTrailingSlashes(string url)
{
while(url.EndsWith("/", StringComparison.Ordinal))
url = url.Substring(0, url.Length - 1);
return url;
}
private AuthResponse Config
{
get
{
if (m_config == null || m_configExpires < DateTime.UtcNow)
{
var retries = 0;
while(true)
{
try
{
var req = base.CreateRequest(AUTH_URL);
req.Headers.Add("Authorization", string.Format("Basic {0}", m_credentials));
req.ContentType = "application/json; charset=utf-8";
using(var resp = (HttpWebResponse)new AsyncHttpRequest(req).GetResponse())
m_config = ReadJSONResponse<AuthResponse>(resp);
m_config.APIUrl = DropTrailingSlashes(m_config.APIUrl);
m_config.DownloadUrl = DropTrailingSlashes(m_config.DownloadUrl);
m_configExpires = DateTime.UtcNow + TimeSpan.FromHours(1);
return m_config;
}
catch (Exception ex)
{
var msg = ex.Message;
var clienterror = false;
try
{
// Only retry once on client errors
if (ex is WebException && (ex as WebException).Response is HttpWebResponse)
{
var sc = (int)((ex as WebException).Response as HttpWebResponse).StatusCode;
clienterror = (sc >= 400 && sc <= 499);
}
}
catch
{
}
if (retries >= (clienterror ? 1 : 5))
{
AttemptParseAndThrowException(ex);
throw;
}
System.Threading.Thread.Sleep(TimeSpan.FromSeconds(Math.Pow(2, retries)));
retries++;
}
}
}
return m_config;
}
}
public static void AttemptParseAndThrowException(Exception ex)
{
Exception newex = null;
try
{
if (ex is WebException && (ex as WebException).Response is HttpWebResponse)
{
string rawdata = null;
var hs = (ex as WebException).Response as HttpWebResponse;
using(var rs = Library.Utility.AsyncHttpRequest.TrySetTimeout(hs.GetResponseStream()))
using(var sr = new System.IO.StreamReader(rs))
rawdata = sr.ReadToEnd();
newex = new Exception("Raw message: " + rawdata);
var msg = JsonConvert.DeserializeObject<ErrorResponse>(rawdata);
newex = new Exception(string.Format("{0} - {1}: {2}", msg.Status, msg.Code, msg.Message));
}
}
catch
{
}
if (newex != null)
throw newex;
}
protected override void ParseException(Exception ex)
{
AttemptParseAndThrowException(ex);
}
public static HttpStatusCode GetExceptionStatusCode(Exception ex)
{
if (ex is WebException && (ex as WebException).Response is HttpWebResponse)
return ((ex as WebException).Response as HttpWebResponse).StatusCode;
else
return (HttpStatusCode)0;
}
private class ErrorResponse
{
[JsonProperty("code")]
public string Code { get; set; }
[JsonProperty("message")]
public string Message { get; set; }
[JsonProperty("status")]
public long Status { get; set; }
}
private class AuthResponse
{
[JsonProperty("accountId")]
public string AccountID { get; set; }
[JsonProperty("apiUrl")]
public string APIUrl { get; set; }
[JsonProperty("authorizationToken")]
public string AuthorizationToken { get; set; }
[JsonProperty("downloadUrl")]
public string DownloadUrl { get; set; }
}
}
}
|
