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
|
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Net;
using System.Net.Http;
using System.Net.Http.Headers;
using System.Reflection;
using System.Threading.Tasks;
using SendGrid.SmtpApi;
// ReSharper disable MemberCanBePrivate.Global
namespace SendGrid
{
public class Web : ITransport
{
#region Properties
//TODO: Make this configurable
public const String Endpoint = "https://api.sendgrid.com/api/mail.send.xml";
private readonly NetworkCredential _credentials;
private readonly HttpClient _client;
#endregion
/// <summary>
/// Creates a new Web interface for sending mail
/// </summary>
/// <param name="credentials">SendGridMessage user parameters</param>
public Web(NetworkCredential credentials)
: this(credentials, TimeSpan.FromSeconds(100)) { }
/// <summary>
/// Creates a new Web interface for sending mail.
/// </summary>
/// <param name="credentials">SendGridMessage user parameters</param>
/// <param name="httpTimeout">HTTP request timeout</param>
public Web(NetworkCredential credentials, TimeSpan httpTimeout)
{
_credentials = credentials;
_client = new HttpClient();
var version = Assembly.GetExecutingAssembly().GetName().Version.ToString();
_client.DefaultRequestHeaders.TryAddWithoutValidation("User-Agent", "sendgrid/" + version + ";csharp");
_client.Timeout = httpTimeout;
}
/// <summary>
/// Asynchronously delivers a message over SendGrid's Web interface
/// </summary>
/// <param name="message"></param>
public async Task DeliverAsync(ISendGrid message)
{
var content = new MultipartFormDataContent();
AttachFormParams(message, content);
AttachFiles(message, content);
var response = await _client.PostAsync(Endpoint, content);
await ErrorChecker.CheckForErrorsAsync(response);
}
#region Support Methods
private void AttachFormParams(ISendGrid message, MultipartFormDataContent content)
{
var formParams = FetchFormParams(message);
foreach (var keyValuePair in formParams)
{
content.Add(new StringContent(keyValuePair.Value), keyValuePair.Key);
}
}
private void AttachFiles(ISendGrid message, MultipartFormDataContent content)
{
var files = FetchFileBodies(message);
foreach (var file in files)
{
var fs = new FileStream(file.Key, FileMode.Open, FileAccess.Read);
var fileContent = new StreamContent(fs);
fileContent.Headers.ContentDisposition = new ContentDispositionHeaderValue("form-data")
{
Name = "files[" + Path.GetFileName(file.Key) + "]",
FileName = Path.GetFileName(file.Key)
};
fileContent.Headers.ContentType = MediaTypeHeaderValue.Parse("application/octet-stream");
content.Add(fileContent);
}
var streamingFiles = FetchStreamingFileBodies(message);
foreach (var file in streamingFiles)
{
var stream = file.Value;
var fileContent = new StreamContent(stream);
fileContent.Headers.ContentDisposition = new ContentDispositionHeaderValue("form-data")
{
Name = "files[" + Path.GetFileName(file.Key) + "]",
FileName = Path.GetFileName(file.Key)
};
fileContent.Headers.ContentType = MediaTypeHeaderValue.Parse("application/octet-stream");
content.Add(fileContent);
}
}
internal List<KeyValuePair<String, String>> FetchFormParams(ISendGrid message)
{
var result = new List<KeyValuePair<string, string>>
{
new KeyValuePair<String, String>("api_user", _credentials.UserName),
new KeyValuePair<String, String>("api_key", _credentials.Password),
new KeyValuePair<String, String>("headers",
message.Headers.Count == 0 ? null : Utils.SerializeDictionary(message.Headers)),
new KeyValuePair<String, String>("replyto",
message.ReplyTo.Length == 0 ? null : message.ReplyTo.ToList().First().Address),
new KeyValuePair<String, String>("from", message.From.Address),
new KeyValuePair<String, String>("fromname", message.From.DisplayName),
new KeyValuePair<String, String>("subject", message.Subject),
new KeyValuePair<String, String>("text", message.Text),
new KeyValuePair<String, String>("html", message.Html),
new KeyValuePair<String, String>("x-smtpapi", message.Header.JsonString() ?? "")
};
if (message.To != null)
{
result = result.Concat(message.To.ToList().Select(a => new KeyValuePair<String, String>("to[]", a.Address)))
.Concat(message.To.ToList().Select(a => new KeyValuePair<String, String>("toname[]", a.DisplayName)))
.ToList();
}
if (message.Cc != null)
{
result.AddRange(message.Cc.Select(c => new KeyValuePair<string, string>("cc[]", c.Address)));
}
if (message.Bcc != null)
{
result.AddRange(message.Bcc.Select(c => new KeyValuePair<string, string>("bcc[]", c.Address)));
}
if (message.GetEmbeddedImages().Count > 0) {
result = result.Concat(message.GetEmbeddedImages().ToList().Select(x => new KeyValuePair<String, String>(string.Format("content[{0}]", x.Key), x.Value)))
.ToList();
}
return result.Where(r => !String.IsNullOrEmpty(r.Value)).ToList();
}
internal IEnumerable<KeyValuePair<string, MemoryStream>> FetchStreamingFileBodies(ISendGrid message)
{
return message.StreamedAttachments.Select(kvp => kvp).ToList();
}
internal List<KeyValuePair<String, FileInfo>> FetchFileBodies(ISendGrid message)
{
return message.Attachments == null
? new List<KeyValuePair<string, FileInfo>>()
: message.Attachments.Select(name => new KeyValuePair<String, FileInfo>(name, new FileInfo(name))).ToList();
}
#endregion
}
}
|
