I ran into an issue recently when in an existing Console Application project we're forced to remove a reference to WSE 3.0. When I tried to remove it from references (because I could not find where it's used) it turned out there is only one place and it's using the SoapEnvelope class.
A little bit about the application: it's a console application that connects to an Exchange Server and listens to incoming emails, around 2-3k emails daily.
The SoapEnvelope class is used to read and parse the email body:
/// <summary>
/// Reads content of received HTTP request.
/// </summary>
/// <param name="client">The specified client.</param>
/// <returns>The watermark string if the read is successful; otherwise the last watermark.</returns>
public string Read(TcpClient client)
{
try
{
_myReadBuffer = new byte[client.ReceiveBufferSize];
using (var networkStream = client.GetStream())
{
var httpRequest = new MailboxHttpRequest(networkStream);
if (httpRequest.HasBody)
{
var httpResponse = new MailboxHttpResponse(_mailbox);
httpResponse.ParseBody(httpRequest.Body);
httpResponse.Send(networkStream, httpRequest.Body);
}
return httpRequest.Watermark;
}
}
catch (Exception ex)
{
Logger.WriteErrorLine("[EventsCollector] Error calling Read in MailboxNotificationManager", ex);
return _mailbox.LastWatermark;
}
finally
{
_myReadBuffer = null;
}
}
And the ParseBody methods looks like this:
/// <summary>
/// Parses the XML body content of receive notification and initialized email processing, if new message was received.
/// </summary>
/// <param name="body">XML content of received notification.</param>
public void ParseBody(string body)
{
var soapEnvelope = new SoapEnvelope() { InnerXml = body };
var serializer = new XmlSerializer(typeof(SendNotificationResponseType));
using (var reader = new XmlNodeReader(soapEnvelope.Body.FirstChild))
{
var notificationResponse = (SendNotificationResponseType)serializer.Deserialize(reader);
if (notificationResponse.ResponseMessages != null) // Process notification, if request contains response message
{
_result = processNotification(notificationResponse);
}
}
}
As you can see, it creates a SoapEnvelope class to access the body`s first child.
MailboxHttpRequest class
private class MailboxHttpRequest
{
private readonly Regex _httpRequestBodyLengthPattern = new Regex(#"Content-Length: (?<BodyLength>\d*)", RegexOptions.Compiled);
private readonly Regex _httpRequestBodyPattern = new Regex(#"<\?xml .*", RegexOptions.Compiled);
private readonly Regex _httpRequestWatermarkPattern = new Regex(#"<t:Watermark>(?<Watermark>.*?)<\/t:Watermark>", RegexOptions.Compiled);
private const int _bufferSize = 8192;
public bool HasBody
{
get { return !String.IsNullOrEmpty(Body); }
}
public string Body { get; private set; }
public string Watermark { get; private set; }
/// <summary>
/// Initializes a new instance of the <see cref="MailboxHttpRequest"/> class and reads incoming messages
/// </summary>
/// <param name="networkStream">The network stream.</param>
public MailboxHttpRequest(NetworkStream networkStream)
{
var completeRequest = new StringBuilder();
var readBuffer = new byte[_bufferSize];
do // Read incoming message that might consist of many parts
{
var newDataLength = networkStream.Read(readBuffer, 0, readBuffer.Length);
completeRequest.Append(Encoding.ASCII.GetString(readBuffer, 0, newDataLength));
}
while (networkStream.DataAvailable || !requestWasFullyReceived(completeRequest.ToString()));
Body = _httpRequestBodyPattern.Match(completeRequest.ToString())
.Value;
Watermark = _httpRequestWatermarkPattern.Match(Body).Groups["Watermark"].Value;
}
}
The downside is that I`m not able test this part of code since I cant listen to same mailbox so I cant check what and how does the passed string look like.
If anybody has any suggestion on how to replace the SoapEnvelope class, would be greatly appreciate it.
Cosmin
I'm developing API via c# that will send notification to specific user ( android user) , then when user open the notification I want to redirect him to specific activity.
So I needed to send data along with notification message. I've tested it using Firebase Console and it's working fine , The notification is received and my launcher activity receive the extra from data has been sent
I've also tested it from my backend and the notification is received except that my launcher intent doesn't receive any extra.
I've been struggling for hours now , Any idea would help !
this is my code from c#
public String getNotification ()
{
string serverKey = "xxxx";
var result = "-1";
try
{
var webAddr = "https://fcm.googleapis.com/fcm/send";
var regID = "xxxx";
var httpWebRequest = (HttpWebRequest)WebRequest.Create(webAddr);
httpWebRequest.ContentType = "application/json";
httpWebRequest.Headers.Add("Authorization:key=" + serverKey);
httpWebRequest.Method = "POST";
using (var streamWriter = new StreamWriter(httpWebRequest.GetRequestStream()))
{
string json = "{\"to\": \"" + regID +
"\",\"notification\": {\"title\": \"Testing\",\"body\": \"Hi Testing\"}" +
"," + "\"data:\"" + "{\"mymsg\":" + "\"h\" }}";
streamWriter.Write(json);
streamWriter.Flush();
}
var httpResponse = (HttpWebResponse)httpWebRequest.GetResponse();
using (var streamReader = new StreamReader(httpResponse.GetResponseStream()))
{
result = streamReader.ReadToEnd();
}
return result;
}
catch (Exception ex)
{
Console.WriteLine(ex.ToString());
return "Can't Send";
}
}
}
And this is my launcher activity :
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Log.d("test" , "in main");
if (getIntent().getStringExtra("mymsg") != null) {
Log.d("test" , "has extra");
Intent intent = new Intent(this, Main2Activity.class);
startActivity(intent);
finish();
} else {
Log.d("test" , "no extra");
}
It looks like you have the wrong JSON:
," + "\"data:\"" + "{\"mymsg\":" + "\"h\" }} will be:
"data:" {
"mymsg":"h"
}
just correct your JSON. But I recommend using c# classes and serialization. Look at this simple example:
var payload = new {
to = "XXXX",
notification = new
{
body = "Test",
title = "Test"
},
data = new {
mymsg = "h"
}
}
// Using Newtonsoft.Json
string postbody = JsonConvert.SerializeObject(payload).ToString();
But its just example. You should create classes instead of anonym objects and using JsonProperty or another way to serialize the object. Something like that:
/// <summary>
/// Data for sending push-messages.
/// </summary>
public class PushData
{
/// <summary>
/// [IOS] Displaying message
/// </summary>
[JsonProperty("alert")]
public Alert Alert { get; set; }
/// <summary>
/// [IOS] badge value (can accept string representaion of number or "Increment")
/// </summary>
[JsonProperty("badge")]
public Int32? Badge { get; set; }
/// <summary>
/// [IOS] The name of sound to play
/// </summary>
[JsonProperty("sound")]
public String Sound { get; set; }
/// <summary>
/// [IOS>=7] Content to download in background
/// </summary>
/// <remarks>
/// Set 1 for silent mode
/// </remarks>
[JsonProperty("content-available")]
public Int32? ContentAvailable { get; set; }
/// <summary>
/// [IOS>=8] Category of interactive push with additional actions
/// </summary>
[JsonProperty("category")]
public String Category { get; set; }
/// <summary>
/// [Android] Used for collapsing some messages with same collapse_key
/// </summary>
[JsonProperty(PropertyName = "collapse_key")]
public String CollapseKey { get; set; }
/// <summary>
/// [Android] This parameter specifies how long (in seconds) the message should be kept in GCM storage if the device is offline.
/// The maximum time to live supported is 4 weeks, and the default value is 4 weeks.
/// </summary>
/// <value>
/// Time_to_live value of 0 means messages that can't be delivered immediately will be discarded
/// </value>
[JsonProperty("time_to_live")]
public Int32 TimeToLive { get; set; }
/// <summary>
/// [Android] Uri of activity to open when push activated by user
/// </summary>
[JsonProperty("url")]
public String Url { get; set; }
/// <summary>
/// Payload for push
/// </summary>
[JsonProperty("data")]
public Payload Payload { get; set; }
}
with message builder which serialize your message body to correct json string.
I'm trying to create a custom ReadLine() method in a custom Console class.
I want to create a Console application on Android and iOS by using Xamarin.Forms.
This is my Console class right now:
public class DHConsole
{
protected static Entry inEntry;
protected static Label outLabel;
protected static bool write = false;
public static bool completed = false;
/// <summary>
/// Gets the in output.
/// </summary>
/// <param name="edit">Edit.</param>
/// <param name="etr">Etr.</param>
public static void GetInOutputX(Label oLabel, Entry iEntry)
{
outLabel = oLabel; // Xamarin.Forms.Label
inEntry = iEntry; // Xamarin.Froms.Entry
}
/// <summary>
/// Write the specified output.
/// </summary>
/// <returns>The write.</returns>
/// <param name="output">Output.</param>
public static void Write(string output)
{
outLabel.Text += output;
write = true;
}
/// <summary>
/// Writes the line.
/// </summary>
/// <param name="output">Output.</param>
public static void WriteLine(string output)
{
// Check if there already is set the method Write().
if (!write)
{
// Set the output on a new line.
outLabel.Text += "\n";
}
else
{
// Set the output on the current line.
// And set write to false.
write = false;
}
outLabel.Text += output;
}
/// <summary>
/// Reads the line.
/// </summary>
/// <returns>The line.</returns>
public static string ReadLine()
{
//GetLine(inEntry.Text).Wait();
//completed = false;
outLabel.Text += inEntry.Text;
return inEntry.Text;
}
/// <summary>
/// Reads the key.
/// </summary>
/// <returns>The key.</returns>
public static string ReadKey()
{
string input = inEntry.Text;
return input[input.Length - 1].ToString();
}
//protected async static Task GetLine(string entryText)
//{
// Task<string> textTask = entryText;
// string text = await textTask;
//}
}
The idea is to get the Console.WriteLine() and custom Console.ReadLine() on the screen like this:
DHConsole.WriteLine("What is the firstname of this new User?");
string firstname = DHConsole.ReadLine();
DHConsole.WriteLine("What is the lastname of this new User?");
string lastname = DHConsole.ReadLine();
DHConsole.WriteLine("What is the username of this new User?");
string username = DHConsole.ReadLine();
DHConsole.WriteLine("What is the name of the street of this new User?");
string street = DHConsole.ReadLine();
DHConsole.WriteLine("What is the house number of this new User?");
string houseNumber = DHConsole.ReadLine();
DHConsole.WriteLine("What is the name of the city of this new User?");
string city = DHConsole.ReadLine();
DHConsole.WriteLine("What is the name of the country of this new User?");
string country = DHConsole.ReadLine();
DHConsole.WriteLine("Do you want to continue registering?[Yes/No]");
string sContinue = DHConsole.ReadLine();
if (IsEqualCI(sContinue, "Yes"))
{
users.Add(new User
{
Id = createId(users),
FirstName = firstname,
LastName = lastname,
UserName = username,
Street = street,
HouseNumber = houseNumber,
City = city,
Country = country
});
}
else
{
DHConsole.WriteLine("OK, bye!");
}
But the output comes like this:
I tried the accepted answer on waiting for users response, but this doesn't work for my project.
Now my question is: How do I pause the code after each question, to wait for the user's response?
Thanks in advance!
What #Nkosi meant was to modify your ReadLine to following:
TaskCompletionSource<string> _tcs;
public Task<string> Readline()
{
_tcs = new TaskCompletionSource<string>();
EventHandler handler = null;
handler = new EventHandler((sender, args) =>
{
var entry = sender as Entry;
_tcs.SetResult(entry.Text);
entry.Text = string.Empty;
entry.Completed -= handler;
});
var ctrl = inEntry;
ctrl.Completed += handler;
ctrl.Focus();
return _tcs.Task;
}
Sample usage:
string firstname = await DHConsole.ReadLine();
Basically this code uses TaskCompletionSource and Completed event (which is fired when enter key is pressed).
I am trying to get Oauth to work with the Twitter Streaming API but I am getting a 401 Unauthorized error. I found a blog that provided code for the Oauth authentication, but I had to tweak it to get it to compile. Here's what I have so far in my main method:
HttpWebRequest webRequest = null;
HttpWebResponse webResponse = null;
StreamReader responseStream = null;
String twitterUser = Properties.Settings.Default.TwitterAccount;
String twitterPassword = Properties.Settings.Default.TwitterPassword;
String twitterHashtags = Properties.Settings.Default.TwitterHashtags;
String twitterConsumerKey = Properties.Settings.Default.TwitterConsumerKey;
String twitterConsumerSecret = Properties.Settings.Default.TwitterConsumerSecret;
String twitterAccessToken = Properties.Settings.Default.TwitterAccessTokens;
String twitterAccessTokenSecret = Properties.Settings.Default.TwitterAccessTokenSecret;
Int32 wait = 250;
while (true) //Auto retry on error!
{
try
{
var postData = "track=" + HttpUtility.UrlEncode(twitterHashtags);
var requestContentBuffer = Encoding.UTF8.GetBytes(postData);
webRequest = (HttpWebRequest)WebRequest.Create(new Uri("https://stream.twitter.com/1.1/statuses/filter.json"));
webRequest.Method = "POST";
webRequest.ContentLength = requestContentBuffer.Length;
webRequest.ContentType = "application/x-www-form-urlencoded";
webRequest.UserAgent = "OAuthTwitterStream";
webRequest.Headers["Accept-Encoding"] = "deflate, gzip";
webRequest.AutomaticDecompression = DecompressionMethods.GZip | DecompressionMethods.Deflate;
OAuthRequestAuthorizer _requestAuthorizer = new OAuthRequestAuthorizer(twitterConsumerKey, twitterConsumerSecret, twitterAccessToken, twitterAccessTokenSecret);
_requestAuthorizer.Authorize(webRequest, postData);
using (var dataStream = webRequest.GetRequestStream())
{
dataStream.Write(requestContentBuffer, 0, requestContentBuffer.Length);
}
webResponse = (HttpWebResponse)webRequest.GetResponse();
responseStream = new StreamReader(webResponse.GetResponseStream());
while (true)
{
string jsonText = responseStream.ReadLine();
dynamic o = JsonConvert.DeserializeObject(jsonText);
if (o.disconnect == null) //Sometimes you get a disconnect response, we don't want our clients to see this.
{
//do something with tweet object
}
}
}
catch (WebException ee)
{
if (ee.Status == WebExceptionStatus.ProtocolError)
{
if (wait < 10000)
wait = 10000;
else
{
if (wait < 240000)
wait = wait * 2;
}
}
Console.Error.WriteLine(ee.Message);
}
catch (Exception ee)
{
Console.Error.WriteLine(ee.Message);
}
finally
{
if (webRequest != null)
{
webRequest.Abort();
}
if (responseStream != null)
{
responseStream.Close();
responseStream = null;
}
if (webResponse != null)
{
webResponse.Close();
webResponse = null;
}
Console.WriteLine("Waiting: " + wait);
Thread.Sleep(wait);
}
}
And here is the Oauth class:
using System;
using System.Security.Cryptography;
using System.Collections.Generic;
using System.Text;
using System.Web;
namespace OAuth
{
public class OAuthBase
{
/// <summary>
/// Provides a predefined set of algorithms that are supported officially by the protocol
/// </summary>
public enum SignatureTypes
{
HMACSHA1,
PLAINTEXT,
RSASHA1
}
/// <summary>
/// Provides an internal structure to sort the query parameter
/// </summary>
protected class QueryParameter
{
private string name = null;
private string value = null;
public QueryParameter(string name, string value)
{
this.name = name;
this.value = value;
}
public string Name
{
get { return name; }
}
public string Value
{
get { return value; }
}
}
/// <summary>
/// Comparer class used to perform the sorting of the query parameters
/// </summary>
protected class QueryParameterComparer : IComparer<QueryParameter>
{
#region IComparer<QueryParameter> Members
public int Compare(QueryParameter x, QueryParameter y)
{
if (x.Name == y.Name)
{
return string.Compare(x.Value, y.Value);
}
else
{
return string.Compare(x.Name, y.Name);
}
}
#endregion
}
protected const string OAuthVersion = "1.0";
protected const string OAuthParameterPrefix = "oauth_";
//
// List of know and used oauth parameters' names
//
protected const string OAuthConsumerKeyKey = "oauth_consumer_key";
protected const string OAuthCallbackKey = "oauth_callback";
protected const string OAuthVersionKey = "oauth_version";
protected const string OAuthSignatureMethodKey = "oauth_signature_method";
protected const string OAuthSignatureKey = "oauth_signature";
protected const string OAuthTimestampKey = "oauth_timestamp";
protected const string OAuthNonceKey = "oauth_nonce";
protected const string OAuthTokenKey = "oauth_token";
protected const string OAuthTokenSecretKey = "oauth_token_secret";
protected const string HMACSHA1SignatureType = "HMAC-SHA1";
protected const string PlainTextSignatureType = "PLAINTEXT";
protected const string RSASHA1SignatureType = "RSA-SHA1";
protected Random random = new Random();
protected string unreservedChars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789-_.~";
/// <summary>
/// Helper function to compute a hash value
/// </summary>
/// <param name="hashAlgorithm">The hashing algoirhtm used. If that algorithm needs some initialization, like HMAC and its derivatives, they should be initialized prior to passing it to this function</param>
/// <param name="data">The data to hash</param>
/// <returns>a Base64 string of the hash value</returns>
private string ComputeHash(HashAlgorithm hashAlgorithm, string data)
{
if (hashAlgorithm == null)
{
throw new ArgumentNullException("hashAlgorithm");
}
if (string.IsNullOrEmpty(data))
{
throw new ArgumentNullException("data");
}
byte[] dataBuffer = System.Text.Encoding.ASCII.GetBytes(data);
byte[] hashBytes = hashAlgorithm.ComputeHash(dataBuffer);
return Convert.ToBase64String(hashBytes);
}
/// <summary>
/// Internal function to cut out all non oauth query string parameters (all parameters not begining with "oauth_")
/// </summary>
/// <param name="parameters">The query string part of the Url</param>
/// <returns>A list of QueryParameter each containing the parameter name and value</returns>
private List<QueryParameter> GetQueryParameters(string parameters)
{
if (parameters.StartsWith("?"))
{
parameters = parameters.Remove(0, 1);
}
List<QueryParameter> result = new List<QueryParameter>();
if (!string.IsNullOrEmpty(parameters))
{
string[] p = parameters.Split('&');
foreach (string s in p)
{
if (!string.IsNullOrEmpty(s) && !s.StartsWith(OAuthParameterPrefix))
{
if (s.IndexOf('=') > -1)
{
string[] temp = s.Split('=');
result.Add(new QueryParameter(temp[0], temp[1]));
}
else
{
result.Add(new QueryParameter(s, string.Empty));
}
}
}
}
return result;
}
/// <summary>
/// This is a different Url Encode implementation since the default .NET one outputs the percent encoding in lower case.
/// While this is not a problem with the percent encoding spec, it is used in upper case throughout OAuth
/// </summary>
/// <param name="value">The value to Url encode</param>
/// <returns>Returns a Url encoded string</returns>
protected string UrlEncode(string value)
{
StringBuilder result = new StringBuilder();
foreach (char symbol in value)
{
if (unreservedChars.IndexOf(symbol) != -1)
{
result.Append(symbol);
}
else
{
result.Append('%' + String.Format("{0:X2}", (int)symbol));
}
}
return result.ToString();
}
/// <summary>
/// Normalizes the request parameters according to the spec
/// </summary>
/// <param name="parameters">The list of parameters already sorted</param>
/// <returns>a string representing the normalized parameters</returns>
protected string NormalizeRequestParameters(IList<QueryParameter> parameters)
{
StringBuilder sb = new StringBuilder();
QueryParameter p = null;
for (int i = 0; i < parameters.Count; i++)
{
p = parameters[i];
sb.AppendFormat("{0}={1}", p.Name, p.Value);
if (i < parameters.Count - 1)
{
sb.Append("&");
}
}
return sb.ToString();
}
/// <summary>
/// Generate the signature base that is used to produce the signature
/// </summary>
/// <param name="url">The full url that needs to be signed including its non OAuth url parameters</param>
/// <param name="consumerKey">The consumer key</param>
/// <param name="token">The token, if available. If not available pass null or an empty string</param>
/// <param name="tokenSecret">The token secret, if available. If not available pass null or an empty string</param>
/// <param name="httpMethod">The http method used. Must be a valid HTTP method verb (POST,GET,PUT, etc)</param>
/// <param name="signatureType">The signature type. To use the default values use <see cref="OAuthBase.SignatureTypes">OAuthBase.SignatureTypes</see>.</param>
/// <returns>The signature base</returns>
public string GenerateSignatureBase(Uri url, string consumerKey, string token, string tokenSecret, string httpMethod, string timeStamp, string nonce, string signatureType, out string normalizedUrl, out string normalizedRequestParameters)
{
if (token == null)
{
token = string.Empty;
}
if (tokenSecret == null)
{
tokenSecret = string.Empty;
}
if (string.IsNullOrEmpty(consumerKey))
{
throw new ArgumentNullException("consumerKey");
}
if (string.IsNullOrEmpty(httpMethod))
{
throw new ArgumentNullException("httpMethod");
}
if (string.IsNullOrEmpty(signatureType))
{
throw new ArgumentNullException("signatureType");
}
normalizedUrl = null;
normalizedRequestParameters = null;
List<QueryParameter> parameters = GetQueryParameters(url.Query);
parameters.Add(new QueryParameter(OAuthVersionKey, OAuthVersion));
parameters.Add(new QueryParameter(OAuthNonceKey, nonce));
parameters.Add(new QueryParameter(OAuthTimestampKey, timeStamp));
parameters.Add(new QueryParameter(OAuthSignatureMethodKey, signatureType));
parameters.Add(new QueryParameter(OAuthConsumerKeyKey, consumerKey));
if (!string.IsNullOrEmpty(token))
{
parameters.Add(new QueryParameter(OAuthTokenKey, token));
}
parameters.Sort(new QueryParameterComparer());
normalizedUrl = string.Format("{0}://{1}", url.Scheme, url.Host);
if (!((url.Scheme == "http" && url.Port == 80) || (url.Scheme == "https" && url.Port == 443)))
{
normalizedUrl += ":" + url.Port;
}
normalizedUrl += url.AbsolutePath;
normalizedRequestParameters = NormalizeRequestParameters(parameters);
StringBuilder signatureBase = new StringBuilder();
signatureBase.AppendFormat("{0}&", httpMethod.ToUpper());
signatureBase.AppendFormat("{0}&", UrlEncode(normalizedUrl));
signatureBase.AppendFormat("{0}", UrlEncode(normalizedRequestParameters));
return signatureBase.ToString();
}
/// <summary>
/// Generate the signature value based on the given signature base and hash algorithm
/// </summary>
/// <param name="signatureBase">The signature based as produced by the GenerateSignatureBase method or by any other means</param>
/// <param name="hash">The hash algorithm used to perform the hashing. If the hashing algorithm requires initialization or a key it should be set prior to calling this method</param>
/// <returns>A base64 string of the hash value</returns>
public string GenerateSignatureUsingHash(string signatureBase, HashAlgorithm hash)
{
return ComputeHash(hash, signatureBase);
}
/// <summary>
/// Generates a signature using the HMAC-SHA1 algorithm
/// </summary>
/// <param name="url">The full url that needs to be signed including its non OAuth url parameters</param>
/// <param name="consumerKey">The consumer key</param>
/// <param name="consumerSecret">The consumer seceret</param>
/// <param name="token">The token, if available. If not available pass null or an empty string</param>
/// <param name="tokenSecret">The token secret, if available. If not available pass null or an empty string</param>
/// <param name="httpMethod">The http method used. Must be a valid HTTP method verb (POST,GET,PUT, etc)</param>
/// <returns>A base64 string of the hash value</returns>
public string GenerateSignature(Uri url, string consumerKey, string consumerSecret, string token, string tokenSecret, string httpMethod, string timeStamp, string nonce, out string normalizedUrl, out string normalizedRequestParameters)
{
return GenerateSignature(url, consumerKey, consumerSecret, token, tokenSecret, httpMethod, timeStamp, nonce, SignatureTypes.HMACSHA1, out normalizedUrl, out normalizedRequestParameters);
}
/// <summary>
/// Generates a signature using the specified signatureType
/// </summary>
/// <param name="url">The full url that needs to be signed including its non OAuth url parameters</param>
/// <param name="consumerKey">The consumer key</param>
/// <param name="consumerSecret">The consumer seceret</param>
/// <param name="token">The token, if available. If not available pass null or an empty string</param>
/// <param name="tokenSecret">The token secret, if available. If not available pass null or an empty string</param>
/// <param name="httpMethod">The http method used. Must be a valid HTTP method verb (POST,GET,PUT, etc)</param>
/// <param name="signatureType">The type of signature to use</param>
/// <returns>A base64 string of the hash value</returns>
public string GenerateSignature(Uri url, string consumerKey, string consumerSecret, string token, string tokenSecret, string httpMethod, string timeStamp, string nonce, SignatureTypes signatureType, out string normalizedUrl, out string normalizedRequestParameters)
{
normalizedUrl = null;
normalizedRequestParameters = null;
switch (signatureType)
{
case SignatureTypes.PLAINTEXT:
return HttpUtility.UrlEncode(string.Format("{0}&{1}", consumerSecret, tokenSecret));
case SignatureTypes.HMACSHA1:
string signatureBase = GenerateSignatureBase(url, consumerKey, token, tokenSecret, httpMethod, timeStamp, nonce, HMACSHA1SignatureType, out normalizedUrl, out normalizedRequestParameters);
HMACSHA1 hmacsha1 = new HMACSHA1();
hmacsha1.Key = Encoding.ASCII.GetBytes(string.Format("{0}&{1}", UrlEncode(consumerSecret), string.IsNullOrEmpty(tokenSecret) ? "" : UrlEncode(tokenSecret)));
return GenerateSignatureUsingHash(signatureBase, hmacsha1);
case SignatureTypes.RSASHA1:
throw new NotImplementedException();
default:
throw new ArgumentException("Unknown signature type", "signatureType");
}
}
/// <summary>
/// Generate the timestamp for the signature
/// </summary>
/// <returns></returns>
public virtual string GenerateTimeStamp()
{
// Default implementation of UNIX time of the current UTC time
TimeSpan ts = DateTime.UtcNow - new DateTime(1970, 1, 1, 0, 0, 0, 0);
return Convert.ToInt64(ts.TotalSeconds).ToString();
}
/// <summary>
/// Generate a nonce
/// </summary>
/// <returns></returns>
public virtual string GenerateNonce()
{
// Just a simple implementation of a random number between 123400 and 9999999
return random.Next(123400, 9999999).ToString();
}
}
}
And finally the OAuthRequestAuthorizer class:
using OAuth;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Web;
namespace LiveTwitter
{
public interface IRequestAuthorizer
{
void Authorize(HttpWebRequest request, string postData);
}
public class OAuthRequestAuthorizer : OAuthBase, IRequestAuthorizer
{
private readonly string _twitterConsumerKey;
private readonly string _twitterConsumerSecret;
private readonly string _twitterAccessToken;
private readonly string _twitterAccessTokenSecret;
public OAuthRequestAuthorizer(string twitterConsumerKey, string twitterConsumerSecret, string twitterAccessToken, string twitterAccessTokenSecret)
{
_twitterConsumerKey = twitterConsumerKey;
_twitterConsumerSecret = twitterConsumerSecret;
_twitterAccessToken = twitterAccessToken;
_twitterAccessTokenSecret = twitterAccessTokenSecret;
}
public override string GenerateNonce()
{
return new Nonce().Value;
}
private string BuildHeader(HttpWebRequest request, Uri uri)
{
var nonce = GenerateNonce();
var timeStamp = GenerateTimeStamp();
string normalizedUrl;
string normalizedRequestParameters;
var httpMethod = request.Method;
var signature = GenerateSignature(uri, _twitterConsumerKey, _twitterConsumerSecret, _twitterAccessToken, _twitterAccessTokenSecret,
httpMethod, timeStamp, nonce, out normalizedUrl,
out normalizedRequestParameters);
// https://dev.twitter.com/docs/auth/authorizing-request
return
string.Format(
"OAuth oauth_consumer_key=\"{0}\", " +
"oauth_nonce=\"{1}\", " +
"oauth_signature=\"{2}\", " +
"oauth_signature_method=\"HMAC-SHA1\", " +
"oauth_timestamp=\"{3}\", " +
"oauth_token=\"{4}\", " +
"oauth_version=\"1.0\"",
UrlEncode(_twitterConsumerKey),
UrlEncode(_twitterConsumerKey),
UrlEncode(nonce),
UrlEncode(signature),
UrlEncode(timeStamp),
UrlEncode(_twitterAccessToken));
}
public void Authorize(HttpWebRequest request, string postData)
{
//NOTE: It's a must to collect all param either in the header/querystring or post body
var baseUri = string.IsNullOrEmpty(postData) || request.Method.ToUpper() == "GET"
? request.RequestUri
: new Uri(string.Format("{0}?{1}", request.RequestUri.AbsoluteUri, postData));
request.Headers["Authorization"] = BuildHeader(request, baseUri);
}
}
public class Nonce
{
public string Value { get; set; }
public Nonce()
{
Value = Guid.NewGuid().ToString();
}
}
}
I am using the correct API keys and I think I have the correct settings set up on the application. Any idea why I keep getting a 401? Also, if there is a simpler way to do this by all means let me know!
Temboo simplifies the OAuth process for Twitter by breaking it down into two calls:
InitializeOAuth - returns a Twitter authorization URL that you can show to your users and have them grant your application access to their Twitter account
FinalizeOAuth- returns the access tokens you need for authenticated access to the Twitter Streaming API.
You can experiment with Temboo's Twitter OAuth support in your browser from the link below and then generate the source code you need to use this behavior in your app. If your language isn't supported (Temboo does not current have a C# SDK), you can generate REST API cURL commands.
https://www.temboo.com/library/Library/Twitter/OAuth/
(Full disclosure: I work at Temboo, so let me know if you have any questions!)
You've probably either found your bug or found another way of solving the problem by now, but in case you haven't, the 401 error is due to a copy paste error in your OAuthRequestAuthorizer class. You submitted the first parameter twice in the string.format method in the BuildHeader function.
It now returns a 406 error when I try it, but at least its moved past your 401 problem!
I had a very similar issue (and I think I might have taken the same code from the same blog looking at it).
I found that if I used all UPPER CASE characters for value of the track= parameter to the streaming API then I stopped getting the 401 errors.
I'm pulling feeds for my RSS project and I am running into a problem of not knowing how to allow the user to load more items into the collection. At the current moment, everything loads at once. While this is in some cases all right, I would like the user to be able to choose how things get loaded in case they have a slow mobile connection.
This is borrowed code and thus it only adds to my confusion.
Where could i be able to inject code into this sample to allow a dynamic loading of items, say, 30 at a time?
Rss Class:
namespace MyRSSService
{
public class RssService
{
/// Gets the RSS items.
/// <param name="rssFeed">The RSS feed.</param>
/// <param name="onGetRssItemsCompleted">The on get RSS items completed.</param>
/// <param name="onError">The on error.</param>
public static void GetRssItems(string rssFeed, Action<IList<RssItem>> onGetRssItemsCompleted = null, Action<Exception> onError = null, Action onFinally = null)
{
WebClient webClient = new WebClient();
// register on download complete event
webClient.OpenReadCompleted += delegate(object sender, OpenReadCompletedEventArgs e)
{
try
{
// report error
if (e.Error != null)
{
if (onError != null)
{
onError(e.Error);
}
return;
}
// convert rss result to model
IList<RssItem> rssItems = new List<RssItem>();
Stream stream = e.Result;
XmlReader response = XmlReader.Create(stream);
{
SyndicationFeed feeds = SyndicationFeed.Load(response);
foreach (SyndicationItem f in feeds.Items)
{
RssItem rssItem = new RssItem(f.Title.Text, f.Summary.Text, f.PublishDate.ToString(), f.Links[0].Uri.AbsoluteUri);
rssItems.Add(rssItem);
}
}
// notify completed callback
if (onGetRssItemsCompleted != null)
{
onGetRssItemsCompleted(rssItems);
}
}
finally
{
// notify finally callback
if (onFinally != null)
{
onFinally();
}
}
};
webClient.OpenReadAsync(new Uri(rssFeed));
}
}
}
items setting class:
namespace MyRSSService
{
public class RssItem
{
/// <summary>
/// Initializes a new instance of the <see cref="RssItem"/> class.
/// </summary>
/// <param name="title">The title.</param>
/// <param name="summary">The summary.</param>
/// <param name="publishedDate">The published date.</param>
/// <param name="url">The URL.</param>
public RssItem(string title, string summary, string publishedDate, string url)
{
Title = title;
Summary = summary;
PublishedDate = publishedDate;
Url = url;
// Get plain text from html
PlainSummary = HttpUtility.HtmlDecode(Regex.Replace(summary, "<[^>]+?>", ""));
}
public string Title { get; set; }
public string Summary { get; set; }
public string PublishedDate { get; set; }
public string Url { get; set; }
public string PlainSummary { get; set; }
}
}
the binding C# to the page to display the feeds
public partial class FeedPage : PhoneApplicationPage
{
private const string WindowsPhoneBlogPosts = "http://feeds.bbci.co.uk/news/rss.xml";
public FeedPage()
{
InitializeComponent();
RssService.GetRssItems(WindowsPhoneBlogPosts, (items) => { listbox.ItemsSource = items; }, (exception) => { MessageBox.Show(exception.Message); }, null);
}
}
Unless the server where the feed is hosted provides an API to limit the number of returned items (for example, this practice is used for the Xbox Marketplace), you will be downloading the entire feed, even if you decide to only show a part of it.