I have the following thrift server (socket), listening for connections on a specific host/port.
final TProtocolFactory factory = new TBinaryProtocol.Factory();
TNonblockingServerTransport serverTransport = new TNonblockingServerSocket(serverPort);
final SignatureService.Processor theProcessor = new SignatureService.Processor(new SignatureServiceFacade());
TServer server = new THsHaServer(new THsHaServer.Args(serverTransport).processor(theProcessor).
protocolFactory(factory).
minWorkerThreads(minThreads).
maxWorkerThreads(maxThreads));
And following client connection:
clientTransport = new TFramedTransport(new TSocket(signatureHost, signaturePort));
final TProtocol theProtocol = new TBinaryProtocol(clientTransport);
client = new SignatureService.Client(theProtocol);
clientTransport.open();
//call the business specific method
client.doStuff(param1, param2, param3);
As we can see in the code above I need to provide the host and port in order to open a connection with the server.
But I want to use a service discovery with load balance support, because I'll have multiple instances of my service running.
Anybody has an example of this using nginx? All the examples is using regular http rest based applications.
Tks in advance.
Related
I have been having a look to a digest authentication example at:
http://hc.apache.org/httpcomponents-client-4.3.x/examples.html
In my scenario the there are several threads issuing HTTP requests and each of them has to be authenticated with their own set of credentials. Additionally, please consider this question is probably very specific for the Apache HTTP client 4.3 onwards, 4.2 handles authentication probably in a different way, although I didn't check it myself. That said, there goes the actual question.
I want to use just one client instance (static member of the class, that is threadsafe) and give it a connection manager to support several concurrent requests. The point is that each request will provide different credentials and I am not seeing the way to assign credentials per request as the credentials provider is set when building the http client. From the link above:
[...]
HttpHost targetHost = new HttpHost("localhost", 80, "http");
CredentialsProvider credsProvider = new BasicCredentialsProvider();
credsProvider.setCredentials(
new AuthScope(targetHost.getHostName(), targetHost.getPort()),
new UsernamePasswordCredentials("username", "password"));
CloseableHttpClient httpclient = HttpClients.custom()
.setDefaultCredentialsProvider(credsProvider).build();
[...]
Checking:
http://hc.apache.org/httpcomponents-client-ga/tutorial/html/authentication.html#d5e600
The code sample in point 4.4 (seek 4.4. HTTP authentication and execution context), seems to say that the HttpClientContext is given the auth cache and the credentials provider and then is passed to the HTTP request. Next to it the request is executed and it seems that the client will get credentials filtering by the host in the HTTP request. In other words: if the context (or the cache) has valid credentials for the target host of the current HTTP request, he will use them. The problem for me is that different threads will perform different requests to the same host.
Is there any way to provide custom credentials per HTTP request?
Thanks in advance for your time! :)
The problem for me is that different threads will perform different requests to the same host.
Why should this be a problem? As long as you use a different HttpContext instance per thread, execution contexts of those threads are going to be completely indepenent
CloseableHttpClient httpclient = HttpClients.createDefault();
CredentialsProvider credentialsProvider = new BasicCredentialsProvider();
credentialsProvider.setCredentials(AuthScope.ANY, new UsernamePasswordCredentials("user:pass"));
HttpClientContext localContext = HttpClientContext.create();
localContext.setCredentialsProvider(credentialsProvider);
HttpGet httpget = new HttpGet("http://localhost/");
CloseableHttpResponse response = httpclient.execute(httpget, localContext);
try {
EntityUtils.consume(response.getEntity());
} finally {
response.close();
}
I have a similar issue.
I must call n-times a service with a single system user, authenticated with NTLM. I want to do this using multiple threads.
What I came up with is creating a single HTTPClient with no default credential provider. When a request needs to be performed I use an injected CredentialProviderFactory into the method performing the request (in a specific thread). Using this I get a brand new CredentialsProvider and I put this into a Context (created in the thread).
Then I call the execute method on the client using the overload execute(method, context).
class MilestoneBarClient implements IMilestoneBarClient {
private static final Logger log = LoggerFactory.getLogger(MilestoneBarClient.class);
private MilestoneBarBuilder builder;
private CloseableHttpClient httpclient;
private MilestoneBarUriBuilder uriBuilder;
private ICredentialsProviderFactory credsProviderFactory;
MilestoneBarClient(CloseableHttpClient client, ICredentialsProviderFactory credsProviderFactory, MilestoneBarUriBuilder uriBuilder) {
this(client, credsProviderFactory, uriBuilder, new MilestoneBarBuilder());
}
MilestoneBarClient(CloseableHttpClient client, ICredentialsProviderFactory credsProviderFactory, MilestoneBarUriBuilder uriBuilder, MilestoneBarBuilder milestoneBarBuilder) {
this.credsProviderFactory = credsProviderFactory;
this.uriBuilder = uriBuilder;
this.builder = milestoneBarBuilder;
this.httpclient = client;
}
// This method is called by multiple threads
#Override
public MilestoneBar get(String npdNumber) {
log.debug("Asking milestone bar info for {}", npdNumber);
try {
String url = uriBuilder.getPathFor(npdNumber);
log.debug("Building request for URL {}", url);
HttpClientContext localContext = HttpClientContext.create();
localContext.setCredentialsProvider(credsProviderFactory.create());
HttpGet httpGet = new HttpGet(url);
long start = System.currentTimeMillis();
try(CloseableHttpResponse resp = httpclient.execute(httpGet, localContext)){
[...]
For some reasons I sometimes get an error, but I guess it's an NTLMCredentials issue (not being thread-safe...).
In your case, you could probably pass the factory to the get methods instead of passing in creation.
I am using the new Akka IO and followed this tutorial(which is a simple server-client application). My server actor system code looks like this:
// create the sever system
ActorSystem tcpServerSystem = ActorSystem.create("tcp-server-system");
// create the tcp actor
final ActorRef tcpServer = Tcp.get(tcpServerSystem).manager();
// create the server actor;
ActorRef serverActor = tcpServerSystem.actorOf(new Props(ServerActor.class).withRouter(new RoundRobinRouter(5)), "server");
// tell the tcp server to use an actor for listen connection on;
final List<Inet.SocketOption> options = new ArrayList<Inet.SocketOption>();
options.add(TcpSO.reuseAddress(true));
tcpServer.tell(TcpMessage.bind(serverActor, new InetSocketAddress("127.0.0.1", 12345), 10, options),
serverActor);
The ServerActor class it's just a plain actor that on it's onReceive does the followings:
logger.info("Received: " + o);
if (o instanceof Tcp.Connected){
connectionActor = getSender();
connectionActor.tell(TcpMessage.register(getSelf()), getSelf());
ByteStringBuilder byteStringBuilder = new ByteStringBuilder();
byteStringBuilder.putBytes("Hello Worlds".getBytes());
connectionActor.tell(TcpMessage.write(byteStringBuilder.result()), getSelf());
}
I am trying to test the server actor using netcat and have this "strange" behaviour: only the first client that connect tot the server is receiving the message send from the server. The nexts clients could connect to the server but does not receive the message. Also in debug mode the server actor doesn't get the Tcp.Connected message(except for the first connected client), so a registration message could not be sent to the client, althought the next clients could connect.
this is a known issue in the 2.2-M1 milestone, where the problem was that the TcpListener didn't register AcceptInterest on the selector unless it reached the configured BatchAcceptLimit, leading to it not being notified of new accepts if there where only a few connections pending.
It has been fixed and will be part of the next milestone release.
i am trying to host a wcf service which has a following attribute;
[ServiceBehavior(InstanceContextMode = InstanceContextMode.Single, ConcurrencyMode = ConcurrencyMode.Multiple)]
and i am creating host class like this;
var uri = new Uri("net.tcp://localhost:7951");
var binding = new NetTcpBinding();
host = new ServiceHost(typeof(ChatService), uri);
ServiceMetadataBehavior smb = host.Description.Behaviors.Find<ServiceMetadataBehavior>();
if (smb == null) host.Description.Behaviors.Add(new ServiceMetadataBehavior());
host.AddServiceEndpoint(typeof(IMetadataExchange), MetadataExchangeBindings.CreateMexTcpBinding(), "mex");
host.AddServiceEndpoint(typeof(IChat), new NetTcpBinding(), "");
host.Open();
So, on developer computer and dedicated server this is working. However, what i need to do is, host this on a VPS (vitual private server).
I thought making a web project and adding this code block to global.asax application start method. but this failed. I suspect problem that the port is closed from firewall maybe.
What solution should I follow?
There is a proxy server on the clients site that all external request must go through. I am calling an external web service that needs the proxy settings.
The code I am using to set up the proxy for the web request can be seen below.
How would I go about setting up a test proxy server on my developer environment to verify that my code works?
string url = String.Format("http://currencyconverter.kowabunga.net/converter.asmx/GetConversionAmount?CurrencyFrom={0}&CurrencyTo={1}&RateDate={2}&Amount={3}", CurrencyFrom.Text, CurrencyTo.Text, formattedDate, amount);
WebRequest request = WebRequest.Create(url);
if (!string.IsNullOrEmpty(ConfigurationManager.AppSettings["proxyLogin"]))
{
WebProxy proxy = new WebProxy();
string proxyUrl = ConfigurationManager.AppSettings["proxyUrl"];
if (!string.IsNullOrEmpty(ConfigurationManager.AppSettings["proxyPort"]))
{
proxyUrl += ":" +ConfigurationManager.AppSettings["proxyPort"];
}
// Associate the newUri object to 'myProxy' object so that new myProxy settings can be set.
proxy.Address = new Uri(proxyUrl);
// Create a NetworkCredential object and associate it with the
// Proxy property of request object.
proxy.Credentials = new NetworkCredential(ConfigurationManager.AppSettings["proxyLogin"], ConfigurationManager.AppSettings["proxyPassword"]);
request.Proxy = proxy;
}
WebResponse response = request.GetResponse();
You can install a proxy server in your development environment and configure the machines in such a way that the service is deployed beyond the firewall and you need to connect to the service through the proxy server only.
I am using the HTTP Connection in the following way:
HttpConnection _httpConnection = null;
try {
_httpConnection = (HttpConnection)Connector.open(_url);
} catch(Exception e) { }
byte [] postDataBytes = _postData.getBytes();
_httpConnection.setRequestMethod(HttpConnection.POST);
_httpConnection.setRequestProperty("User-Agent","Profile/MIDP-2.0 Configuration/CLDC-1.0");
_httpConnection.setRequestProperty("Content-Language", "en-US");
_httpConnection.setRequestProperty("Content-Type","application/x-www-form-urlencoded");
_httpConnection.setRequestProperty("Connection", "close");
_httpConnection.setRequestProperty("Content-Length", Integer.toString(_postData.getBytes().length));
os = _httpConnection.openOutputStream();
os.write(postDataBytes);
os.flush();
This HTTP Connection requires parameters to successfully open. For example on a WIFI network, it requires the ";deviceside=true;interface=wifi" to be added to the URL.
The problem is for the EDGE connection. Each country requires different parameters to be added. For example in lebanon it requires ";deviceside=false" but in KSA if i add this parameter the connection will not open. In USA it needs different types of parametes. The question is how to establish an HTTP connection for all the countries with the same parameters. So that the application will successfully have an internet connection no matter where it is downloaded.
Welcome to the confusing world of network transports on BlackBerry! You will want to start with the article Connecting your BlackBerry - http and socket connections to the world.
Here is a simple example for "just give me a connection" (note, you will need to add appropriate error handling; also, myURL in the code below should have no connection descriptor info appended to it):
ConnectionFactory factory = new ConnectionFactory();
ConnectionDescriptor descriptor = factory.getConnection(myURL);
if (descriptor != null) {
_httpConnection = (HttpConnection) descriptor.getConnection();
...
}
Try using to use the method reffered in this link melick-rajee.blogspot.com and use it like
_url = "http://www.example.com";
_httpConnection = (HttpConnection)Connector.open(_url + getConnectionString());
You will have to sign the application to use this else the application will show exception.
To sign your application just go here Code Signing Keys
To use the connectionFactory, seems you need to set BisBOptions.
Try this:
connFact = new ConnectionFactory();
connFact.setTransportTypeOptions(TransportInfo.TRANSPORT_BIS_B,
new BisBOptions("mds-public"));