I have this method that is in Java, what would be the same code in C#. I am struggling with what the C# code would be to do this
private String signSHA256RSA(String input) throws Exception
{
byte[] b1 = Base64.getDecoder().decode(privKey);
PKCS8EncodedKeySpec spec = new PKCS8EncodedKeySpec(b1);
KeyFactory kf = KeyFactory.getInstance("RSA");
Signature privateSignature = Signature.getInstance("SHA256withRSA");
privateSignature.initSign(kf.generatePrivate(spec));
privateSignature.update(input.getBytes(StandardCharsets.UTF_8));
return byteArrayToHex(privateSignature.sign());
}
This is how I solved this in the end.
I used this 3rd party library https://github.com/huysentruitw/pem-utils
Then I just used this code
private static string SignSHA256RSA(string itemToSign)
{
var bytes = Encoding.UTF8.GetBytes(itemToSign);
using (var stream = File.OpenRead(#"C:\PrivateKey.pem"))
using (var reader = new PemReader(stream))
{
var rsaParameters = reader.ReadRsaKey();
byte[] hv = SHA256.Create().ComputeHash(bytes);
RSACryptoServiceProvider prov = new RSACryptoServiceProvider();
RSAParameters rsp = new RSAParameters();
prov.ImportParameters(rsaParameters);
RSAPKCS1SignatureFormatter rf = new RSAPKCS1SignatureFormatter(prov);
rf.SetHashAlgorithm("SHA256");
byte[] signature = rf.CreateSignature(hv);
var finalHex = BitConverter.ToString(signature).Replace("-", string.Empty).ToLowerInvariant();
return finalHex;
}
}
With .NET standard 2.1 you need a little helper to decode the private key from Base64 encoded DER file.
using System;
using System.Security.Cryptography;
using System.Buffers.Binary;
using System.Text;
namespace Demo
{
class Program
{
const string DerPrivateKey = "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";
static void Main(string[] args)
{
var signature = SignSHA256RSA(base64Key: DerPrivateKey, input: "Hello world!");
System.Console.WriteLine("Signature (HEX): " + signature);
}
private static string SignSHA256RSA(string base64Key, string input)
{
// Load key with the little DER helper
var rsa = LoadRSAKey(derPrivateKey: Convert.FromBase64String(DerPrivateKey));
// Sign
var inputBytes = Encoding.UTF8.GetBytes(input);
var signatureBytes = rsa.SignData(inputBytes, 0, inputBytes.Length, HashAlgorithmName.SHA256, RSASignaturePadding.Pkcs1);
// Convert signature to hex
var signatureHex = BitConverter.ToString(signatureBytes).Replace("-", string.Empty);
return signatureHex;
}
private static RSA LoadRSAKey(ReadOnlySpan<byte> derPrivateKey)
{
// Expect sequence
if (AsnHelper.GetTag(derPrivateKey[0]) != 16)
throw new FormatException($"unexpected tag");
// Read sequence length
derPrivateKey = derPrivateKey.Slice(1);
if (!AsnHelper.TryReadLength(derPrivateKey, out var length, out var bytesRead))
throw new FormatException($"unexpected length");
var sequence = AsnHelper.ReadSequence(derPrivateKey.Slice(bytesRead, length));
// https://www.hanselman.com/blog/DecodingAnSSHKeyFromPEMToBASE64ToHEXToASN1ToPrimeDecimalNumbers.aspx
var rsaParameters = new RSAParameters
{
Modulus = sequence[1].RawData,
Exponent = sequence[2].RawData,
D = sequence[3].RawData,
P = sequence[4].RawData,
Q = sequence[5].RawData,
DP = sequence[6].RawData,
DQ = sequence[7].RawData,
InverseQ = sequence[8].RawData,
};
var rsa = RSA.Create();
rsa.ImportParameters(rsaParameters);
return rsa;
}
}
/// <summary>
/// Quick helper: only works on specific key format
///
/// https://en.wikipedia.org/wiki/X.690#BER_encoding
/// </summary>
internal static class AsnHelper
{
public static int GetTag(byte value) => value & 0b11111;
public static AsnEncodedDataCollection ReadSequence(ReadOnlySpan<byte> source)
{
var sequence = new AsnEncodedDataCollection();
while (!source.IsEmpty)
{
var tag = GetTag(source[0]);
if (tag != 2)
throw new FormatException("only support integer");
source = source.Slice(1);
if (!TryReadLength(source, out var length, out var bytesRead))
throw new FormatException("invalid length");
source = source.Slice(bytesRead);
var value = new AsnEncodedData(source.Slice(0, length).ToArray());
source = source.Slice(length);
sequence.Add(value);
}
return sequence;
}
public static bool TryReadLength(ReadOnlySpan<byte> source, out int length, out int bytesRead)
{
length = 0;
bytesRead = 0;
const byte MultiByteMarker = 0x80;
bytesRead = 1;
if ((source[0] & MultiByteMarker) == 0)
{
length = source[0];
return true;
}
int lengthLength = source[0] & 0x7F;
bytesRead += lengthLength;
if (lengthLength == 2)
{
length = BinaryPrimitives.ReadInt16BigEndian(source.Slice(1));
return true;
}
return false;
}
}
}
For testing, I generate a key with the following:
openssl genrsa 768 | openssl rsa -outform der | base64 -w 0
C#.Net code framework: 4.6,
It worked for me.
private string SignSHA256RSA(string itemToSign)
{
string filePath = Server.MapPath("Merchant_private_key_test.pem");
var bytes = System.Text.Encoding.GetEncoding("UTF-8").GetBytes(itemToSign);
var sha256 = new SHA256CryptoServiceProvider();
byte[] rgbHash = sha256.ComputeHash(bytes);
StreamReader sr = new StreamReader(filePath);
PemReader pr = new PemReader(sr);
RsaPrivateCrtKeyParameters KeyPair = (RsaPrivateCrtKeyParameters)pr.ReadObject();
RSA rsa = DotNetUtilities.ToRSA(KeyPair);
string xmlRsa = rsa.ToXmlString(true);
RSACryptoServiceProvider key = new RSACryptoServiceProvider();
key.FromXmlString(xmlRsa);
RSAPKCS1SignatureFormatter formatter = new RSAPKCS1SignatureFormatter(key);
formatter.SetHashAlgorithm("SHA256");
byte[] inArray = formatter.CreateSignature(rgbHash);
return Convert.ToBase64String(inArray);
}
I am using this code to send notification message by C# with GCM, using Winforms, Webforms, whatever. Now I want to send to FCM (Firebase Cloud Messaging). Should I update my code? :
public class AndroidGCMPushNotification
{
public AndroidGCMPushNotification()
{
//
// TODO: Add constructor logic here
//
}
public string SendNotification(string deviceId, string message)
{
string SERVER_API_KEY = "server api key";
var SENDER_ID = "application number";
var value = message;
WebRequest tRequest;
tRequest = WebRequest.Create("https://android.googleapis.com/gcm/send");
tRequest.Method = "post";
tRequest.ContentType = " application/x-www-form-urlencoded;charset=UTF-8";
tRequest.Headers.Add(string.Format("Authorization: key={0}", SERVER_API_KEY));
tRequest.Headers.Add(string.Format("Sender: id={0}", SENDER_ID));
string postData = "collapse_key=score_update&time_to_live=108&delay_while_idle=1&data.message=" + value + "&data.time=" + System.DateTime.Now.ToString() + "®istration_id=" + deviceId + "";
Console.WriteLine(postData);
Byte[] byteArray = Encoding.UTF8.GetBytes(postData);
tRequest.ContentLength = byteArray.Length;
Stream dataStream = tRequest.GetRequestStream();
dataStream.Write(byteArray, 0, byteArray.Length);
dataStream.Close();
WebResponse tResponse = tRequest.GetResponse();
dataStream = tResponse.GetResponseStream();
StreamReader tReader = new StreamReader(dataStream);
String sResponseFromServer = tReader.ReadToEnd();
tReader.Close();
dataStream.Close();
tResponse.Close();
return sResponseFromServer;
}
}
but the GCM was changed to FCM. Is this same code to send the notification?
Where can I find the SERVER_API_KEY? Is the same solution?
firebase cloud messaging with c#:
working all .net platform (asp.net, .netmvc, .netcore)
WebRequest tRequest = WebRequest.Create("https://fcm.googleapis.com/fcm/send");
tRequest.Method = "post";
//serverKey - Key from Firebase cloud messaging server
tRequest.Headers.Add(string.Format("Authorization: key={0}", "AIXXXXXX...."));
//Sender Id - From firebase project setting
tRequest.Headers.Add(string.Format("Sender: id={0}", "XXXXX.."));
tRequest.ContentType = "application/json";
var payload = new
{
to = "e8EHtMwqsZY:APA91bFUktufXdsDLdXXXXXX..........XXXXXXXXXXXXXX",
priority = "high",
content_available = true,
notification = new
{
body = "Test",
title = "Test",
badge = 1
},
data = new
{
key1 = "value1",
key2 = "value2"
}
};
string postbody = JsonConvert.SerializeObject(payload).ToString();
Byte[] byteArray = Encoding.UTF8.GetBytes(postbody);
tRequest.ContentLength = byteArray.Length;
using (Stream dataStream = tRequest.GetRequestStream())
{
dataStream.Write(byteArray, 0, byteArray.Length);
using (WebResponse tResponse = tRequest.GetResponse())
{
using (Stream dataStreamResponse = tResponse.GetResponseStream())
{
if (dataStreamResponse != null) using (StreamReader tReader = new StreamReader(dataStreamResponse))
{
String sResponseFromServer = tReader.ReadToEnd();
//result.Response = sResponseFromServer;
}
}
}
}
Here is another approach of writing Notification Service inside ASP.Net REST API.
public async Task<bool> NotifyAsync(string to, string title, string body)
{
try
{
// Get the server key from FCM console
var serverKey = string.Format("key={0}", "Your server key - use app config");
// Get the sender id from FCM console
var senderId = string.Format("id={0}", "Your sender id - use app config");
var data = new
{
to, // Recipient device token
notification = new { title, body }
};
// Using Newtonsoft.Json
var jsonBody = JsonConvert.SerializeObject(data);
using (var httpRequest = new HttpRequestMessage(HttpMethod.Post, "https://fcm.googleapis.com/fcm/send"))
{
httpRequest.Headers.TryAddWithoutValidation("Authorization", serverKey);
httpRequest.Headers.TryAddWithoutValidation("Sender", senderId);
httpRequest.Content = new StringContent(jsonBody, Encoding.UTF8, "application/json");
using (var httpClient = new HttpClient())
{
var result = await httpClient.SendAsync(httpRequest);
if (result.IsSuccessStatusCode)
{
return true;
}
else
{
// Use result.StatusCode to handle failure
// Your custom error handler here
_logger.LogError($"Error sending notification. Status Code: {result.StatusCode}");
}
}
}
}
catch (Exception ex)
{
_logger.LogError($"Exception thrown in Notify Service: {ex}");
}
return false;
}
References:
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.Logging;
using Newtonsoft.Json;
using System.Net.Http;
using System.Text;
using System.Threading.Tasks;
I have posted this answer as this question was viewed most and this server side code was written in VS 2015 in C# for sending push notification either single device based on device id or subscribed topic to Xamarin Android app
public class FCMPushNotification
{
public FCMPushNotification()
{
// TODO: Add constructor logic here
}
public bool Successful
{
get;
set;
}
public string Response
{
get;
set;
}
public Exception Error
{
get;
set;
}
public FCMPushNotification SendNotification(string _title, string _message, string _topic)
{
FCMPushNotification result = new FCMPushNotification();
try
{
result.Successful = true;
result.Error = null;
// var value = message;
var requestUri = "https://fcm.googleapis.com/fcm/send";
WebRequest webRequest = WebRequest.Create(requestUri);
webRequest.Method = "POST";
webRequest.Headers.Add(string.Format("Authorization: key={0}", YOUR_FCM_SERVER_API_KEY));
webRequest.Headers.Add(string.Format("Sender: id={0}", YOUR_FCM_SENDER_ID));
webRequest.ContentType = "application/json";
var data = new
{
// to = YOUR_FCM_DEVICE_ID, // Uncoment this if you want to test for single device
to="/topics/"+_topic, // this is for topic
notification=new
{
title=_title,
body=_message,
//icon="myicon"
}
};
var serializer = new JavaScriptSerializer();
var json = serializer.Serialize(data);
Byte[] byteArray = Encoding.UTF8.GetBytes(json);
webRequest.ContentLength = byteArray.Length;
using (Stream dataStream = webRequest.GetRequestStream())
{
dataStream.Write(byteArray, 0, byteArray.Length);
using (WebResponse webResponse = webRequest.GetResponse())
{
using (Stream dataStreamResponse = webResponse.GetResponseStream())
{
using (StreamReader tReader = new StreamReader(dataStreamResponse))
{
String sResponseFromServer = tReader.ReadToEnd();
result.Response = sResponseFromServer;
}
}
}
}
}
catch(Exception ex)
{
result.Successful = false;
result.Response = null;
result.Error = ex;
}
return result;
}
}
and its uses
// start sending push notification to apps
FCMPushNotification fcmPush = new FCMPushNotification();
fcmPush.SendNotification("your notificatin title", "Your body message","news");
// end push notification
Yes, you should update your code to use Firebase Messaging interface.
There's a GitHub Project for that here.
using Stimulsoft.Base.Json;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Net;
using System.Text;
using System.Web;
namespace _WEBAPP
{
public class FireBasePush
{
private string FireBase_URL = "https://fcm.googleapis.com/fcm/send";
private string key_server;
public FireBasePush(String Key_Server)
{
this.key_server = Key_Server;
}
public dynamic SendPush(PushMessage message)
{
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(FireBase_URL);
request.Method = "POST";
request.Headers.Add("Authorization", "key=" + this.key_server);
request.ContentType = "application/json";
string json = JsonConvert.SerializeObject(message);
//json = json.Replace("content_available", "content-available");
byte[] byteArray = Encoding.UTF8.GetBytes(json);
request.ContentLength = byteArray.Length;
Stream dataStream = request.GetRequestStream();
dataStream.Write(byteArray, 0, byteArray.Length);
dataStream.Close();
HttpWebResponse respuesta = (HttpWebResponse)request.GetResponse();
if (respuesta.StatusCode == HttpStatusCode.Accepted || respuesta.StatusCode == HttpStatusCode.OK || respuesta.StatusCode == HttpStatusCode.Created)
{
StreamReader read = new StreamReader(respuesta.GetResponseStream());
String result = read.ReadToEnd();
read.Close();
respuesta.Close();
dynamic stuff = JsonConvert.DeserializeObject(result);
return stuff;
}
else
{
throw new Exception("Ocurrio un error al obtener la respuesta del servidor: " + respuesta.StatusCode);
}
}
}
public class PushMessage
{
private string _to;
private PushMessageData _notification;
private dynamic _data;
private dynamic _click_action;
public dynamic data
{
get { return _data; }
set { _data = value; }
}
public string to
{
get { return _to; }
set { _to = value; }
}
public PushMessageData notification
{
get { return _notification; }
set { _notification = value; }
}
public dynamic click_action
{
get
{
return _click_action;
}
set
{
_click_action = value;
}
}
}
public class PushMessageData
{
private string _title;
private string _text;
private string _sound = "default";
//private dynamic _content_available;
private string _click_action;
public string sound
{
get { return _sound; }
set { _sound = value; }
}
public string title
{
get { return _title; }
set { _title = value; }
}
public string text
{
get { return _text; }
set { _text = value; }
}
public string click_action
{
get
{
return _click_action;
}
set
{
_click_action = value;
}
}
}
}
Based on Teste's code .. I can confirm the following works. I can't say whether or not this is "good" code, but it certainly works and could get you back up and running quickly if you ended up with GCM to FCM server problems!
public AndroidFCMPushNotificationStatus SendNotification(string serverApiKey, string senderId, string deviceId, string message)
{
AndroidFCMPushNotificationStatus result = new AndroidFCMPushNotificationStatus();
try
{
result.Successful = false;
result.Error = null;
var value = message;
WebRequest tRequest = WebRequest.Create("https://fcm.googleapis.com/fcm/send");
tRequest.Method = "post";
tRequest.ContentType = "application/x-www-form-urlencoded;charset=UTF-8";
tRequest.Headers.Add(string.Format("Authorization: key={0}", serverApiKey));
tRequest.Headers.Add(string.Format("Sender: id={0}", senderId));
string postData = "collapse_key=score_update&time_to_live=108&delay_while_idle=1&data.message=" + value + "&data.time=" + System.DateTime.Now.ToString() + "®istration_id=" + deviceId + "";
Byte[] byteArray = Encoding.UTF8.GetBytes(postData);
tRequest.ContentLength = byteArray.Length;
using (Stream dataStream = tRequest.GetRequestStream())
{
dataStream.Write(byteArray, 0, byteArray.Length);
using (WebResponse tResponse = tRequest.GetResponse())
{
using (Stream dataStreamResponse = tResponse.GetResponseStream())
{
using (StreamReader tReader = new StreamReader(dataStreamResponse))
{
String sResponseFromServer = tReader.ReadToEnd();
result.Response = sResponseFromServer;
}
}
}
}
}
catch (Exception ex)
{
result.Successful = false;
result.Response = null;
result.Error = ex;
}
return result;
}
public class AndroidFCMPushNotificationStatus
{
public bool Successful
{
get;
set;
}
public string Response
{
get;
set;
}
public Exception Error
{
get;
set;
}
}
You need change url from https://android.googleapis.com/gcm/send to https://fcm.googleapis.com/fcm/send and change your app library too. this tutorial can help you https://firebase.google.com/docs/cloud-messaging/server#implementing-http-connection-server-protocol
Try to send a json object.
Replace this:
tRequest.ContentType = " application/x-www-form-urlencoded;charset=UTF-8";
string postData = "collapse_key=score_update&time_to_live=108&delay_while_idle=1&data.message=" + value + "&data.time=" + System.DateTime.Now.ToString() + "®istration_id=" + deviceId + "";
Console.WriteLine(postData);
Byte[] byteArray = Encoding.UTF8.GetBytes(postData);
For this:
tRequest.ContentType = "application/json";
var data = new
{
to = deviceId,
notification = new
{
body = "This is the message",
title = "This is the title",
icon = "myicon"
}
};
var serializer = new JavaScriptSerializer();
var json = serializer.Serialize(data);
Byte[] byteArray = Encoding.UTF8.GetBytes(json);
Here's the code for server side firebase cloud request from C# / Asp.net.
Please note that your client side should have same topic.
e.g.
FirebaseMessaging.getInstance().subscribeToTopic("news");
public String SendNotificationFromFirebaseCloud()
{
var result = "-1";
var webAddr = "https://fcm.googleapis.com/fcm/send";
var httpWebRequest = (HttpWebRequest)WebRequest.Create(webAddr);
httpWebRequest.ContentType = "application/json";
httpWebRequest.Headers.Add("Authorization:key=" + YOUR_FIREBASE_SERVER_KEY);
httpWebRequest.Method = "POST";
using (var streamWriter = new StreamWriter(httpWebRequest.GetRequestStream()))
{
string json = "{\"to\": \"/topics/news\",\"data\": {\"message\": \"This is a Firebase Cloud Messaging Topic Message!\",}}";
streamWriter.Write(json);
streamWriter.Flush();
}
var httpResponse = (HttpWebResponse)httpWebRequest.GetResponse();
using (var streamReader = new StreamReader(httpResponse.GetResponseStream()))
{
result = streamReader.ReadToEnd();
}
return result;
}
You can use this library, makes it seamless to send push notifications using Firebase Service from a C# backend download here
public SendNotice(int deviceType, string deviceToken, string message, int badge, int status, string sound)
{
AndroidFCMPushNotificationStatus result = new AndroidFCMPushNotificationStatus();
try
{
result.Successful = false;
result.Error = null;
var value = message;
WebRequest tRequest = WebRequest.Create("https://fcm.googleapis.com/fcm/send");
tRequest.Method = "post";
tRequest.ContentType = "application/json";
var serializer = new JavaScriptSerializer();
var json = "";
tRequest.Headers.Add(string.Format("Authorization: key={0}", "AA******"));
tRequest.Headers.Add(string.Format("Sender: id={0}", "11********"));
if (DeviceType == 2)
{
var body = new
{
to = deviceToken,
data = new
{
custom_notification = new
{
title = "Notification",
body = message,
sound = "default",
priority = "high",
show_in_foreground = true,
targetScreen = notificationType,//"detail",
},
},
priority = 10
};
json = serializer.Serialize(body);
}
else
{
var body = new
{
to = deviceToken,
content_available = true,
notification = new
{
title = "Notification",
body = message,
sound = "default",
show_in_foreground = true,
},
data = new
{
targetScreen = notificationType,
id = 0,
},
priority = 10
};
json = serializer.Serialize(body);
}
Byte[] byteArray = Encoding.UTF8.GetBytes(json);
tRequest.ContentLength = byteArray.Length;
using (Stream dataStream = tRequest.GetRequestStream())
{
dataStream.Write(byteArray, 0, byteArray.Length);
using (WebResponse tResponse = tRequest.GetResponse())
{
using (Stream dataStreamResponse = tResponse.GetResponseStream())
{
using (StreamReader tReader = new StreamReader(dataStreamResponse))
{
String sResponseFromServer = tReader.ReadToEnd();
result.Response = sResponseFromServer;
}
}
}
}
}
catch (Exception ex)
{
result.Successful = false;
result.Response = null;
result.Error = ex;
}
}
I write this code and It's worked for me .
public static string ExcutePushNotification(string title, string msg, string fcmToken, object data)
{
var serverKey = "AAAA*******************";
var senderId = "3333333333333";
var result = "-1";
var httpWebRequest = (HttpWebRequest)WebRequest.Create("https://fcm.googleapis.com/fcm/send");
httpWebRequest.ContentType = "application/json";
httpWebRequest.Headers.Add(string.Format("Authorization: key={0}", serverKey));
httpWebRequest.Headers.Add(string.Format("Sender: id={0}", senderId));
httpWebRequest.Method = "POST";
var payload = new
{
notification = new
{
title = title,
body = msg,
sound = "default"
},
data = new
{
info = data
},
to = fcmToken,
priority = "high",
content_available = true,
};
var serializer = new JavaScriptSerializer();
using (var streamWriter = new StreamWriter(httpWebRequest.GetRequestStream()))
{
string json = serializer.Serialize(payload);
streamWriter.Write(json);
streamWriter.Flush();
}
var httpResponse = (HttpWebResponse)httpWebRequest.GetResponse();
using (var streamReader = new StreamReader(httpResponse.GetResponseStream()))
{
result = streamReader.ReadToEnd();
}
return result;
}
I am using this approach and it is working fine:
public class PushNotification
{
private static readonly ILog Logger = LogManager.GetLogger(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType);
// firebase
private static Uri FireBasePushNotificationsURL = new Uri("https://fcm.googleapis.com/fcm/send");
private static string ServerKey = ConfigurationManager.AppSettings["FIREBASESERVERKEY"];
public static async Task<bool> SendPushNotification(List<SendNotificationModel> notificationData)
{
try
{
bool sent = false;
foreach (var data in notificationData)
{
var messageInformation = new Message()
{
notification = new Notification()
{
title = data.Title,
text = data.Message,
ClickAction = "FCM_PLUGIN_ACTIVITY"
},
data = data.data,
priority="high",
to =data.DeviceId
};
string jsonMessage = JsonConvert.SerializeObject(messageInformation);
//Create request to Firebase API
var request = new HttpRequestMessage(HttpMethod.Post, FireBasePushNotificationsURL);
request.Headers.TryAddWithoutValidation("Authorization", "key=" + ServerKey);
request.Content = new StringContent(jsonMessage, Encoding.UTF8, "application/json");
HttpResponseMessage result;
using (var client = new HttpClient())
{
result = await client.SendAsync(request);
sent = result.IsSuccessStatusCode;
}
}
return sent;
}
catch(Exception ex)
{
Logger.Error(ex);
return false;
}
}
}
Following Approach, I have used for writing Firebase Notification Service inside ASP.Net REST API.
public async Task<bool> NotifyAsync(string to, string title, string body)
{
try
{
//Server key from FCM console
var serverKey = string.Format("key={0}", "Provide your Server key here from Fibase console");
//Sender id from FCM console
var senderId = string.Format("id={0}", "Provide your Sender Id here from Firebase Console");
var data = new
{
to, // Recipient device token
notification = new { title, body }
};
// Using Newtonsoft.Json
var jsonBody = JsonConvert.SerializeObject(data);
using (var httpRequest = new HttpRequestMessage(HttpMethod.Post, "https://fcm.googleapis.com/fcm/send"))
{
httpRequest.Headers.TryAddWithoutValidation("Authorization", serverKey);
httpRequest.Headers.TryAddWithoutValidation("Sender", senderId);
httpRequest.Content = new StringContent(jsonBody, Encoding.UTF8, "application/json");
using (var httpClient = new HttpClient())
{
var result = await httpClient.SendAsync(httpRequest);
if (result.IsSuccessStatusCode)
{
return true;
}
else
{
// Use result.StatusCode to handle failure
// Your custom error handler here
return false;
}
}
}
}
catch (Exception ex)
{
throw ex;
}
return false;
}
Refer This blog for send Group Notification
https://firebase.google.com/docs/cloud-messaging/android/send-multiple
How I can send XML to a web service from C#(.NET)?
Not using "add references"
And I want get response from the service
This code has no exceptions, but I think app can't autorize in web service
I do so
class Program
{
static void Main(string[] args)
{
string xml = "<message>"+
"<service id="+"single"+" source = "+"AlphaName"+"/>"+
"<to>number</to>"+
"<body content-type="+"text/plain"+">"+
"This is a sample message"+
"</body>"+
"</message>";
Program prog = new Program();
HttpWebRequest request = (HttpWebRequest)WebRequest.Create("https://api.life.com.ua/ip2sms/");
request.Credentials = new NetworkCredential("login", "password");
byte[] authBytes = Encoding.UTF8.GetBytes("login:password".ToCharArray());
request.Headers["Authorization"] = Convert.ToBase64String(authBytes);
prog.requests(xml);
}
}
XML request
String requests(string xml)
{
WebResponse result = null;
WebRequest req = null;
Stream newStream = null;
Stream ReceiveStream = null;
StreamReader sr = null;
string strOut = "";
try
{
req = WebRequest.Create("https://api.life.com.ua/ip2sms/");
req.Method = "POST";
req.Timeout = 120000;
//req.ContentType = "text/xml; charset = \"utf8\"";
req.ContentType = "application/x-www-form-urlencoded";
byte[] SomeBytes = null;
SomeBytes = UTF8Encoding.UTF8.GetBytes(xml);
req.ContentLength = SomeBytes.Length;
newStream = req.GetRequestStream();
newStream.Write(SomeBytes, 0, SomeBytes.Length);
newStream.Close();
// считываем результат работы
result = req.GetResponse();
ReceiveStream = result.GetResponseStream();
Encoding encode = Encoding.UTF8;
sr = new StreamReader(ReceiveStream, encode);
Char[] read = new Char[256];
int count = sr.Read(read, 0, 256);
while (count > 0)
{
String str = new String(read, 0, count);
strOut += str;
count = sr.Read(read, 0, 256);
}
}
catch (Exception ex)
{
}
return strOut;
}
but nothing happens.Thanks!
I have a really simple ASP.NET Api Controller with one method.
public HttpResponseMessage<User> Post(User user)
{
return new HttpResponseMessage<User>(new User() { Name = "New User at Server" });
}
My debugger says that the method is called but the problem is that the parameter "user" has all its content set to null; I am using Fiddler to look at request and response.. and all looks good.
This is my service code in the client.
public void AddUser(Models.User user, Action<Models.User> ShowResult)
{
var uiThreadScheduler = TaskScheduler.FromCurrentSynchronizationContext();
string url = "http://localhost:4921/User";
Uri uri = new Uri(url, UriKind.Absolute);
HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(uri);
request.Method = "POST";
request.ContentType = "application/x-www-form-urlencoded";
var sendWebPost = Task.Factory.FromAsync<Stream>(request.BeginGetRequestStream, request.EndGetRequestStream, null)
.ContinueWith(task =>
{
Tuple<string, string>[] stringToSend = { Tuple.Create<string, string>("user", ObjectToJson<Models.User>(user)) };
var bytesToSend = GetRequestBytes(stringToSend);
using (var stream = task.Result)
stream.Write(bytesToSend, 0, bytesToSend.Length);
}
).ContinueWith(task =>
{
Task.Factory.FromAsync<WebResponse>(request.BeginGetResponse, request.EndGetResponse, null)
.ContinueWith<WebResponse>(task2 => { ValidateResponse(task2); return task2.Result; })
.ContinueWith<Models.User>(task3 => {return JsonToObject<Models.User>(task3);})
.ContinueWith(task4 => { TryClearWorking(); ShowResult(task4.Result); }, uiThreadScheduler);
});;
}
public static string ObjectToJson<T>(T obj) where T : class
{
DataContractJsonSerializer serializer = new DataContractJsonSerializer(typeof(T));
MemoryStream stream = new MemoryStream();
StreamReader sr = new StreamReader(stream);
serializer.WriteObject(stream, obj);
sr.BaseStream.Position = 0;
string jsonString = sr.ReadToEnd();
return jsonString;
}
protected static byte[] GetRequestBytes(Tuple<string, string>[] postParameters)
{
if (postParameters == null || postParameters.Length == 0)
return new byte[0];
var sb = new StringBuilder();
foreach (var key in postParameters)
sb.Append(key.Item1 + "=" + key.Item2 + "&");
sb.Length = sb.Length - 1;
return Encoding.UTF8.GetBytes(sb.ToString());
}
Anyone who can give me some ideas where to start to look for errors.....
You need to set the Content-Length header.
I need advice. I zip and crypt SOAP message on web service and client side.
Client is winforms app.
If I only crypt SOAP message, it works good.
If I only zip SOAP message it also works good.
I use SOAP extension on crypt and zip SOAP.
I use AES - Advanced Encryption Standard - Rijndael and on compresion I use SharpZipLib from http://sourceforge.net/projects/sharpdevelop/.
The problem is I send dataset on client.
Firstly I zip and secondly encrypt SOAP on web service side.
Send on client.
On client side I load XML from stream. But it finish with this error :
Data at the root level is invalid. Line 1, position 2234.
Here is the code, where I load XML from stream:
var doc = new XmlDocument();
using (var reader = new XmlTextReader(inputStream))
{
doc.Load(reader);
}
Any advice ? Thank you...
Here are methods on web service side which zip and crypt SOAP :
//encrypt string
private static string EncryptString(string #string, string initialVector, string salt, string password,
string hashAlgorithm, int keySize, int passwordIterations)
{
byte[] initialVectorBytes = Encoding.ASCII.GetBytes(initialVector);
byte[] saltValueBytes = Encoding.ASCII.GetBytes(salt);
byte[] plainTextBytes = Encoding.UTF8.GetBytes(#string);
var derivedPassword = new PasswordDeriveBytes(password, saltValueBytes, hashAlgorithm, passwordIterations);
byte[] keyBytes = derivedPassword.GetBytes(keySize / 8);
var symmetricKey = new RijndaelManaged();
symmetricKey.Mode = CipherMode.CBC;
ICryptoTransform encryptor = symmetricKey.CreateEncryptor(keyBytes, initialVectorBytes);
using (var memStream = new MemoryStream())
{
var cryptoStream = new CryptoStream(memStream, encryptor, CryptoStreamMode.Write);
cryptoStream.Write(plainTextBytes, 0, plainTextBytes.Length);
cryptoStream.FlushFinalBlock();
var serializer = new XmlSerializer(typeof(byte[]));
var sb = new StringBuilder();
TextWriter writer = new StringWriter(sb);
serializer.Serialize(writer, memStream.ToArray());
writer.Flush();
var doc = new XmlDocument();
doc.LoadXml(sb.ToString());
if (doc.DocumentElement != null) return doc.DocumentElement.InnerXml;
}
return "";
}
//zip string
private static byte[] ZipArray(string stringToZip)
{
byte[] inputByteArray = Encoding.UTF8.GetBytes(stringToZip);
var ms = new MemoryStream();
// SharpZipLib.Zip,
var zipOut = new ZipOutputStream(ms);
var zipEntry = new ZipEntry("ZippedFile");
zipOut.PutNextEntry(zipEntry);
zipOut.SetLevel(7);
zipOut.Write(inputByteArray, 0, inputByteArray.Length);
zipOut.Finish();
zipOut.Close();
return ms.ToArray();
}
//zip and encrypt SOAP
public virtual Stream OutSoap(string[] soapElement, Stream inputStream)
{
#region Load XML from SOAP
var doc = new XmlDocument();
using (XmlReader reader = XmlReader.Create(inputStream))
{
doc.Load(reader);
}
var nsMan = new XmlNamespaceManager(doc.NameTable);
nsMan.AddNamespace("soap",
"http://schemas.xmlsoap.org/soap/envelope/");
#endregion Load XML from SOAP
#region Zip SOAP
XmlNode bodyNode = doc.SelectSingleNode(#"//soap:Body", nsMan);
bodyNode = bodyNode.FirstChild.FirstChild;
while (bodyNode != null)
{
if (bodyNode.InnerXml.Length > 0)
{
// Zip
byte[] outData = ZipArray(bodyNode.InnerXml);
bodyNode.InnerXml = Convert.ToBase64String(outData);
}
bodyNode = bodyNode.NextSibling;
}
#endregion Zip SOAP
#region Crypt SOAP
foreach (string xPathQuery in soapElement)
{
XmlNodeList nodesToEncrypt = doc.SelectNodes(xPathQuery, nsMan);
if (nodesToEncrypt != null)
foreach (XmlNode nodeToEncrypt in nodesToEncrypt)
{
//Encrypt
nodeToEncrypt.InnerXml = EncryptString(nodeToEncrypt.InnerXml,
user.IV, user.Salt, user.Password, user.HashType,
user.KeySize, user.PasswordIterations);
}
}
#endregion Crypt SOAP
inputStream.Position = 0;
var settings = new XmlWriterSettings { Encoding = Encoding.UTF8 };
using (XmlWriter writer = XmlWriter.Create(inputStream, settings))
{
doc.WriteTo(writer);
return inputStream;
}
}
Here is a code on client side which decrypt and uzip SOAP :
//decrypt string
private static string DecryptString(string #string, string initialVector, string salt, string password,
string hashAlgorithm, int keySize, int passwordIterations)
{
byte[] initialVectorBytes = Encoding.ASCII.GetBytes(initialVector);
byte[] saltValueBytes = Encoding.ASCII.GetBytes(salt);
byte[] cipherTextBytes = Convert.FromBase64String(#string);
var derivedPassword = new PasswordDeriveBytes(password, saltValueBytes, hashAlgorithm, passwordIterations);
byte[] keyBytes = derivedPassword.GetBytes(keySize / 8);
var symmetricKey = new RijndaelManaged { Mode = CipherMode.CBC };
ICryptoTransform decryptor = symmetricKey.CreateDecryptor(keyBytes, initialVectorBytes);
using (var memStream = new MemoryStream(cipherTextBytes))
{
var cryptoStream = new CryptoStream(memStream, decryptor, CryptoStreamMode.Read);
var plainTextBytes = new byte[cipherTextBytes.Length];
int byteCount = cryptoStream.Read(plainTextBytes, 0, plainTextBytes.Length);
return Encoding.UTF8.GetString(plainTextBytes, 0, byteCount);
}
}
//unzip string
private static byte[] UnzipArray(string stringToUnzip)
{
byte[] inputByteArray = Convert.FromBase64String(stringToUnzip);
var ms = new MemoryStream(inputByteArray);
var ret = new MemoryStream();
// SharpZipLib.Zip
var zipIn = new ZipInputStream(ms);
var theEntry = zipIn.GetNextEntry();
var buffer = new Byte[2048];
int size = 2048;
while (true)
{
size = zipIn.Read(buffer, 0, buffer.Length);
if (size > 0)
{
ret.Write(buffer, 0, size);
}
else
{
break;
}
}
return ret.ToArray();
}
public virtual Stream InSoap(Stream inputStream, string[] soapElement)
{
#region Load XML from SOAP
var doc = new XmlDocument();
using (var reader = new XmlTextReader(inputStream))
{
doc.Load(reader);
}
var nsMan = new XmlNamespaceManager(doc.NameTable);
nsMan.AddNamespace("soap",
"http://schemas.xmlsoap.org/soap/envelope/");
#endregion Load XML from SOAP
#region Decrypt SOAP
foreach (string xPathQuery in soapElement)
{
XmlNodeList nodesToEncrypt = doc.SelectNodes(xPathQuery, nsMan);
if (nodesToEncrypt != null)
foreach (XmlNode nodeToEncrypt in nodesToEncrypt)
{
nodeToEncrypt.InnerXml = DecryptString(nodeToEncrypt.InnerXml, saltPhrase, passwordPhrase, initialVector,
hashAlgorithm, passwordIterations, keySize);
}
}
#endregion Decrypt SOAP
#region UnZip SOAP
XmlNode node = doc.SelectSingleNode("//soap:Body", nsMan);
node = node.FirstChild.FirstChild;
while (node != null)
{
if (node.InnerXml.Length > 0)
{
byte[] outData = UnzipArray(node.InnerXml);
string sTmp = Encoding.UTF8.GetString(outData);
node.InnerXml = sTmp;
}
node = node.NextSibling;
}
#endregion UnZip SOAP
var retStream = new MemoryStream();
doc.Save(retStream);
return retStream;
}
strong text
I'm not sure why your unencrypted xml won't parse, but I think you're first step should be to dump the decrypted data to the terminal to see exactly what text you're getting back. Perhaps the process corrupts your data somehow, or you have an encoding issue.
Alternatively, you could configure your server to use https and gzip compression to achieve the same goal. You won't loose any security with this approach and this is by far the more standard way to do things. You can also have a look at MS's support for the WS-Security standard