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• Devise not allowing active resource to access the services

  - by Saurabh Pandit

  In my application there are two folders one for a rails application and another for a ruby application. In the ruby folder I have created a ruby file in which I have written code to access some model which is present in the rails application using active resource. Sample code is shown below : active_resource_example.rb require 'rubygems' require 'active_resource' class Website < ActiveResource::Base self.site = "http://localhost:3000/admin/" self.user = "user" self.password = "password" end websites = Website.find(:all) puts websites.inspect In my rails application I have used ActiveAdmin gem which uses devise for authentication. On rails Server I get the following result : Started GET "/admin/websites.json" for 192.168.1.37 at 2011-11-12 14:41:06 +0530 Processing by Admin::WebsitesController#index as JSON Completed in 43ms And on my terminal where I executed active_resource_example.rb, I got following error : user@user:~/Desktop$ ruby active_resource_example.rb /home/user/.rvm/gems/ruby-1.9.2-p180/gems/activeresource-3.1.1/lib/active_resource/connection.rb:132:in `handle_response': Failed. Response code = 401. Response message = Unauthorized . (ActiveResource::UnauthorizedAccess) from /home/user/.rvm/gems/ruby-1.9.2-p180/gems/activeresource-3.1.1/lib/active_resource/connection.rb:115:in `request' from /home/user/.rvm/gems/ruby-1.9.2-p180/gems/activeresource-3.1.1/lib/active_resource/connection.rb:80:in `block in get' from /home/user/.rvm/gems/ruby-1.9.2-p180/gems/activeresource-3.1.1/lib/active_resource/connection.rb:218:in `with_auth' from /home/user/.rvm/gems/ruby-1.9.2-p180/gems/activeresource-3.1.1/lib/active_resource/connection.rb:80:in `get' from /home/user/.rvm/gems/ruby-1.9.2-p180/gems/activeresource-3.1.1/lib/active_resource/base.rb:894:in `find_every' from /home/user/.rvm/gems/ruby-1.9.2-p180/gems/activeresource-3.1.1/lib/active_resource/base.rb:806:in `find' from active_resource_example.rb:12:in `<main>' user@user:~/Desktop$ I tried this with another application in which Devise authentication is not used with the same configuration I used in active_resource_example.rb, there I got the result. Desperately need some solution to this issue.

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• How to force ADO.Net to use only the System.String DataType in the readers TableSchema.

  - by Keith Sirmons

  Howdy, I am using an OleDbConnection to query an Excel 2007 Spreadsheet. I want force the OleDbDataReader to use only string as the column datatype. The system is looking at the first 8 rows of data and inferring the data type to be Double. The problem is that on row 9 I have a string in that column and the OleDbDataReader is returning a Null value since it could not be cast to a Double. I have used these connection strings: Provider=Microsoft.ACE.OLEDB.12.0;Data Source="ExcelFile.xlsx";Persist Security Info=False;Extended Properties="Excel 12.0;IMEX=1;HDR=No" Provider=Microsoft.Jet.OLEDB.4.0;Data Source="ExcelFile.xlsx";Persist Security Info=False;Extended Properties="Excel 8.0;HDR=No;IMEX=1" Looking at the reader.GetSchemaTable().Rows[7].ItemArray[5], it's dataType is Double. Row 7 in this schema correlates with the specific column in Excel I am having issues with. ItemArray[5] is its DataType column Is it possible to create a custom TableSchema for the reader so when accessing the ExcelFiles, I can treat all cells as text instead of letting the system attempt to infer the datatype? I found some good info at this page: Tips for reading Excel spreadsheets using ADO.NET The main quirk about the ADO.NET interface is how datatypes are handled. (You'll notice I've been carefully avoiding the question of which datatypes are returned when reading the spreadsheet.) Are you ready for this? ADO.NET scans the first 8 rows of data, and based on that guesses the datatype for each column. Then it attempts to coerce all data from that column to that datatype, returning NULL whenever the coercion fails! Thank you, Keith Here is a reduced version of my code: using (OleDbConnection connection = new OleDbConnection(BuildConnectionString(dataMapper).ToString())) { connection.Open(); using (OleDbCommand cmd = new OleDbCommand()) { cmd.Connection = connection; cmd.CommandText = SELECT * from [Sheet1$]; using (OleDbDataReader reader = cmd.ExecuteReader()) { using (DataTable dataTable = new DataTable("TestTable")) { dataTable.Load(reader); base.SourceDataSet.Tables.Add(dataTable); } } } }

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• Why do Unicode characters show up properly in database, but as ? when printed in Java via Hibernate?

  - by lupefiasco

  I'm writing a webapp, and interfacing with MySQL using Hibernate 3.5. Using "?????? ?????????" as my test string, I can input the string and see that it is properly persisted into the database. However, when I later pull the value out of the database and print to the console as a String, I see "?????? ?????????". If I use new OutputStreamWriter(System.out,"UTF-8"); then I get "„Éá„Çp„ÇØ„Éà„ÉÉ„Éó ·Éò·Éú·Éí·Éö·Éò·É°·É£·É†·Éò"". Why don't I see the original string? These are my hibernate.cfg.xml settings: <property name="hibernate.connection.useUnicode"> true </property> <property name="hibernate.connection.characterEncoding"> UTF-8 </property> <property name="hibernate.connection.charSet"> UTF-8 </property> and this is my database connection string: hibernate.connection.url = jdbc:mysql://localhost/mydatabase?autoReconnect=true&amp;useUnicode=true&amp;characterEncoding=UTF-8

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• JDBC connections: How to specify the port for data-transfer?

  - by LeO

  I wanto to run my JDBC-connection (either Oracle or MSSQL) through a proxy-server. Reason for this is to have additional controls of the traffic, especially for developing. I know, I could specify the proxy, which runs on my machine, and the port in the connection-string. But the specified connection-settings are only taken as some kind of handshake to agree on which port the data is finally transferred. And this is defenitly not the port which I have under proxy-control. So, does anybody have an idea, how to specify the port for the data-transfer? I would prefer if this could be done in the connection-string. The same issue applies for Oracle and MSSQL. Thx LeO

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• NSURLConnection not "firing" until UITableView scrolls..

  - by Simon

  Hi, I've got a UITableView that loads an image asynchronously and places it in the UITableViewCell once it's loaded (I'm using almost the exact same code as in the "LazyTableImages" tutorial). This works fine for all images when I scroll the table, but it's not loading the images that are first in the view. The code is definitely working fine as the class that actually sends the NSURLConnection request is being called correctly (I added an NSLog and it reached the console). The NSURLConnection is just not calling the delegate methods (didReceiveData, connectionDidFinishLoading, etc). Here's my code: HomeController.m - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { static NSString *CellIdentifier = @"Cell"; UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier]; if (cell == nil) { cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease]; NSArray *feed = [feeds objectAtIndex: indexPath.row]; /** * Name of person */ [...] /** * Feed entry */ [...] /** * Misc work */ [...] } FeedRecord *feedRecord = [self.entries objectAtIndex:indexPath.row]; if( !feedRecord.image ) { if (self.table.dragging == NO && self.table.decelerating == NO) { [self startIconDownload:feedRecord forIndexPath:indexPath]; } cell.imageView.image = [UIImage imageNamed:@"Placeholder.png"]; } return cell; } - (void)startIconDownload:(FeedRecord *)feedRecord forIndexPath:(NSIndexPath *)indexPath { IconDownloader *iconDownloader = [imageDownloadsInProgress objectForKey:indexPath]; if (iconDownloader == nil) { iconDownloader = [[IconDownloader alloc] init]; iconDownloader.feedRecord = feedRecord; iconDownloader.indexPathInTableView = indexPath; iconDownloader.delegate = self; [imageDownloadsInProgress setObject:iconDownloader forKey:indexPath]; [iconDownloader startDownload]; [iconDownloader release]; } } IconDownload.m #import "IconDownloader.h" #import "FeedRecord.h" #define kAppIconHeight 48 @implementation IconDownloader @synthesize feedRecord; @synthesize indexPathInTableView; @synthesize delegate; @synthesize activeDownload; @synthesize imageConnection; #pragma mark - (void)dealloc { [feedRecord release]; [indexPathInTableView release]; [activeDownload release]; [imageConnection cancel]; [imageConnection release]; [super dealloc]; } - (void)startDownload { NSLog(@"%@ %@",@"Started downloading", feedRecord.profilePicture); // this shows in log self.activeDownload = [NSMutableData data]; // alloc+init and start an NSURLConnection; release on completion/failure NSURLConnection *conn = [[NSURLConnection alloc] initWithRequest: [NSURLRequest requestWithURL: [NSURL URLWithString:feedRecord.profilePicture]] delegate:self]; self.imageConnection = conn; NSLog(@"%@",conn); // this shows in log [conn release]; } - (void)cancelDownload { [self.imageConnection cancel]; self.imageConnection = nil; self.activeDownload = nil; } #pragma mark - #pragma mark Download support (NSURLConnectionDelegate) - (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data { NSLog(@"%@ %@",@"Got data for", feedRecord.profilePicture); [self.activeDownload appendData:data]; } - (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error { NSLog(@"%@",@"Fail!"); // Clear the activeDownload property to allow later attempts self.activeDownload = nil; // Release the connection now that it's finished self.imageConnection = nil; } - (void)connectionDidFinishLoading:(NSURLConnection *)connection { NSLog(@"%@ %@",@"Done", feedRecord.profilePicture); // Set appIcon and clear temporary data/image UIImage *image = [[UIImage alloc] initWithData:self.activeDownload]; self.feedRecord.image = image; self.activeDownload = nil; [image release]; // Release the connection now that it's finished self.imageConnection = nil; NSLog(@"%@ %@",@"Our delegate is",delegate); // call our delegate and tell it that our icon is ready for display [delegate feedImageDidLoad:self.indexPathInTableView]; } @end Has anyone else experienced anything like this or can identify an issue with my code? Thanks!

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• starting and stopping hsqldb from unit tests

  - by Casey

  I'm trying to create integration tests using hsqldb in an in memory mode. At the moment, I have to start the hsqldb server from the command line before running the unit tests. I would like to be able to be able to control the hsqldb server from my integration tests. I can't seem to get this to all work out though from code. Thanks, Casey Update: This appears to work along with having a hibernate.cfg.xml file in the classpath: org.hsqldb.Server.main(new String[]{}); and in my hibernate.cfg.xml file: <property name="connection.driver_class">org.hsqldb.jdbcDriver</property> <property name="connection.url">jdbc:hsqldb:mem:ww</property> <property name="connection.username">sa</property> <property name="connection.password"></property> <property name="connection.pool_size">1</property> <property name="dialect">org.hibernate.dialect.HSQLDialect</property> <property name="current_session_context_class">thread</property> <property name="cache.provider_class">org.hibernate.cache.NoCacheProvider</property> <property name="hbm2ddl.auto">update</property>

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• How to prevent GetOleDbSchemaTable from returning duplicate sheet names from Excel workbook

  - by Richard Bysouth

  Hi I have a function to return a DataView containing info on sheets in an Excel Workbook, as follows: Public Function GetSchemaInfo() As DataView Using connection As New OleDbConnection(GetConnectionString()) connection.Open() Dim schemaTable As DataTable = connection.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, Nothing) connection.Close() Return New DataView(schemaTable) End Using End Function This works fine except that if the workbook has linked data (i.e. pulls its data from another workbook), duplicate sheet names are returned. For example, Workbook1 has a single worksheet, Sheet1. I get 2 rows in the DataView, with the TABLE_NAME field being "Sheet1$" and "Sheet1$_". OK, I could use a RowFilter, but wondered whether there was a better way or why this extra row is returned? thanks Richard

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• Passing custom Python objects to nosetests

  - by Rob

  I am attempting to re-organize our test libraries for automation and nose seems really promising. My question is, what is the best strategy for passing Python objects into nose tests? Our tests are organized in a testlib with a bunch of modules that exercise different types of request operations. Something like this: testlib \-testmoda \-testmodb \-testmodc In some cases the test modules (i.e. testmoda) is nothing but test_something(), test_something2() functions while in some cases we have a TestModB class in testmob with the test_anotherthing1(), test_anotherthing2() functions. The cool thing is that nose easily finds both. Most of those test functions are request factory stuff that can easily share a single connection to our server farm. Thus we do a lot of test_something1(cnn), TestModB.test_anotherthing2(cnn), etc. Currently we don't use nose, instead we have a hodge-podge of homegrown driver scripts with hard-coded lists of tests to execute. Each of those driver scripts creates its own connection object. Maintaining those scripts and the connection minutia is painful. I'd like to take free advantage of nose's beautiful discovery functionality, passing in a connection object of my choosing. Thanks in advance! Rob P.S. The connection objects are not pickle-able. :(

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• How do you save images to a Blackberry device via HttpConnection?

  - by Kai

  My script fetches xml via httpConnection and saves to persistent store. No problems there. Then I loop through the saved data to compose a list of image url's to fetch via queue. Each of these requests calls the httpConnection thread as so ... public synchronized void run() { HttpConnection connection = (HttpConnection)Connector.open("http://www.somedomain.com/image1.jpg"); connection.setRequestMethod("GET"); String contentType = connection.getHeaderField("Content-type"); InputStream responseData = connection.openInputStream(); connection.close(); outputFinal(responseData, contentType); } public synchronized void outputFinal(InputStream result, String contentType) throws SAXException, ParserConfigurationException, IOException { if(contentType.startsWith("text/")) { // bunch of xml save code that works fine } else if(contentType.equals("image/png") || contentType.equals("image/jpeg") || contentType.equals("image/gif")) { // how to save images here? } else { //default } } What I can't find any good documentation on is how one would take the response data and save it to an image stored on the device. Maybe I just overlooked something very obvious. Any help is very appreciated. Thanks

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• How would you audit ASP.NET Membership tables, while recording what user made the changes?

  - by Pete

  Using a trigger-based approach to audit logging, I am recording the history of changes made to tables in the database. The approach I'm using (with a static sql server login) to record which user made the change involves running a stored procedure at the outset of each database connection. The triggers use this username when recording the audit rows. (The triggers are provided by the product OmniAudit.) However, the ASP.NET Membership tables are accessed primarily through the Membership API. I need to pass in the current user's identity when the Membership API opens its database connection. I tried subclassing MembershipProvider but I cannot access the underlying database connection. It seems like this would be a common problem. Does anyone know of any hooks we can access when the ASP.NET Membership makes its database connection?

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• Arduino - AdHoc Network Setup

  - by methodMan

  I`m currently working with an arduino trying to build an adhoc network to which a device can connect to and send web request to. The problem I am currently having is that I can only set up one connection and then when that connection is terminated (client.stop()) all subsequent connections are not picked up by the server, even a curl command just sits there spinning. The first connection I start when I reset the server works fine and I am able to talk to the server; but after that, the arduino can no longer find new clients (even though it's trying with the library given). I`m using the sparkfun library for the wifly shield cloned from github, along with an Arduino Uno. My current code is based off their default example 'WiFly_AdHoc_Example' but I had to remove a few things to get the network to start up which might be the cause of this problem. Here is the .ino file that I am running. #include <SPI.h> #include <WiFly.h> //#include <SoftwareSerial.h> //SoftwareSerial mySerial( 5, 4); //Part from example not used(see below) WiFlyServer server(80); void setup() { Serial.begin(9600); //The code below is from the example but when I run it the WiFly will hang // on Wifly.begin(). Without it the WiFly starts up fine but only works for // one request. //mySerial.begin(9600); //WiFly.setUart(&mySerial); // Tell the WiFly library that we are not //using the SPIUart Serial.println("**************Starting WiFly**************"); // Enable Adhoc mod WiFly.begin(true); Serial.println("WiFly started, creating network."); if (!WiFly.createAdHocNetwork("wifly")) { Serial.print("Failed to create ad hoc network."); while (1) { // Hang on failure. } } Serial.println("Network created"); Serial.print("IP: "); Serial.println(WiFly.ip()); Serial.println("Starting Server..."); server.begin(); Serial.print("Server started, waiting for client."); } void loop() { delay(200); WiFlyClient client = server.available(); if (client) { Serial.println("Client Found."); // a string to store received commands String current_command = ""; while (client.connected()) { if (client.available()) { //Gets a character from the sent request. char c = client.read(); if (c=='#' || c=='\n') //End of extraneous output { current_command = ""; } else if(c!= '\n') { current_command+=c; } if (current_command== "get") { // output the value of each analog input pin for (int i = 0; i < 6; i++) { client.print("analog input "); client.print(i); client.print(" is "); client.print(analogRead(i)); client.println("<br />"); } } else if(current_command== "hello") { client.println("Hello there, I'm still here."); } else if (current_command== "quit") { client.println("Goodbye..."); client.stop(); current_command == ""; break; } else if (current_command == "*OPEN*") { current_command == ""; } } } // give the web browser time to receive the data delay(200); // close the connection client.stop(); } } If anyone understands this better then I (I`m new to arduino) please leave some helpful comments. Or just help me out on getting this little web server up and running so that I can hit it with more then one request. If there is any other helpful information I can provide please let me know. Thanks for reading and hope you can help. EDIT: Using telnet I can successfully connect (the first time) and send commands to the arduino including one to terminate the connection (calls the client.stop() method). But when I try to reconnect though telnet, it says the connection was successful but on the arduino it's still looping thinking the client is still false. WHAT??? I know right, I'm getting mixed messages from telnet vs arduino. None of the commands work obviously since the ardunio is still looping waiting for a client that evaluates to true. I'm gonna take a look at WiFlyServer from the library I imported and see if I can dig up the problem because somehow that server.available() method isn't finding new clients. Noticing a lot of TODO's in the library code.... EDIT: So I found the reason for the problem, it was in WiFlyServer.cpp file from the sparkfun library. The code that was causing the reconnect issue was infact in the server.availible() method. Right at the top of the method, there is a check: // TODO: Ensure no active non-server client connection. if (!WiFly.serverConnectionActive) { activeClient._port = 0; } For some reason when I comment this out, I can reconnect fine and everything works as it should. I will now dive into the library and see if I can fix this, I'm not exactly sure what this is doing but it gets called when the server connection is not active and is somehow blocking subsequent connections. Does anyone have any ideas how I might get to the root of this problem without using this commenting hack? Please help, no-one has commented or answered yet! Don't you want to join in on the fun???

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• Configure WebLogic MDB to listen to Foreing AMQ Server

  - by eliel.lobo

  I'm trying to create an MDB(EJB 3.0) on WebLogic 10.3.5. to listen to a Queue in an external AMQ server. but after much work and combination of tutorials i get the followin error when deployin on WwebLogic. [EJB:015027]The Message-Driven EJB is transactional but JMS connection factory referenced by the JNDI name: ActiveMQXAConnectionFactory is not a JMS XA connection factory. Here is a brief of the work i have done: I have added the corresponding libraries to my WLS classpath (following thos tuturial http://amadei.com.br/blog/index.php/connecting-weblogic-and-activemq) and I have created the corresponding JMS Modules as indicated in the tutorial. As connection factory I have used ActiveMQConnectionFactory initially and ActiveMQXAConnectionFactory later, I also ignome the jms. notation an just put plain names as testQueue. Then create a simple MDB whit the following structure. I explicitly defined "connectionFactoryJndiName" property because otherwise it assumes a WebLogic connection factory which is not found an then raises an error. @MessageDriven( activationConfig = { @ActivationConfigProperty(propertyName = "destinationType", propertyValue = "javax.jms.Queue"), @ActivationConfigProperty(propertyName = "destination", propertyValue = "testQueue"), @ActivationConfigProperty(propertyName = "connectionFactoryJndiName", propertyValue = "ActiveMQXAConnectionFactory") }, mappedName = "testQueue") public class ROMELReceiver implements MessageListener { /** * Default constructor. */ public ROMELReceiver() { // TODO Auto-generated constructor stub } /** * @see MessageListener#onMessage(Message) */ public void onMessage(Message message) { System.out.println("Message received"); } } At this point I'm stuck with the error mentioned above. Even though I use ActiveMQXAConnectionFactory instead of simply ActiveMQConnectionFactory, JNDI resources tree in web logic server shows org.apache.activemq.ActiveMQConnectionFactory as class for my configured connection factory. am i missing something? or is this just a completely wrong way to connect WebLogic whith AMQ? Thanks in advance.

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• Sockets with Silverlight 4

  - by AngryHacker

  I need to implement a persistent socket connection from my in-browser Silverlight 4 app to a device on the network. I need the following: Connect to it and keep a persistent connection Send and Receive data Get some type of event or notification (or detect it) when the connection drops. Is this possible with Silverlight 4? If so, can someone point me to some examples? All I am finding are some attempts at it with Silverlight 2.

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• .Net opening and closing database connections

  - by Dan

  I designed the data access portion of our framework so that every time a business object needs to interact with the database it would have to open a connection, invoke the data access layer (to execute the query), and then close the connection. Then if it needed to run in a transaction it would open the connection, begin the transaction, invoke the data access layer (to execute the query) and then commit the transaction, close the transaction, and finally close the connection. I did it this way with the mindset of open late and close early... but what if I needed to call other BO's to submit data in a single transaction? Is there a better way to handle opening and closing connections as well as working with transactions? I'm a rookie in designing application architecture so I hope I'm not doing this wrongly... any help is appreciated.

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• Java resource closing

  - by Bob

  Hi, I'm writing an app that connect to a website and read one line from it. I do it like this: try{ URLConnection connection = new URL("www.example.com").openConnection(); BufferedReader rd = new BufferedReader(new InputStreamReader(connection.getInputStream())); String response = rd.readLine(); rd.close(); }catch (Exception e) { //exception handling } Is it good? I mean, I close the BufferedReader in the last line, but I do not close the InputStreamReader. Should I create a standalone InputStreamReader from the connection.getInputStream, and a BufferedReader from the standalone InputStreamReader, than close all the two readers? I think it will be better to place the closing methods in the finally block like this: InputStreamReader isr = null; BufferedReader br = null; try{ URLConnection connection = new URL("www.example.com").openConnection(); isr = new InputStreamReader(connection.getInputStream()); br = new BufferedReader(isr); String response = br.readLine(); }catch (Exception e) { //exception handling }finally{ br.close(); isr.close(); } But it is ugly, because the closing methods can throw exception, so I have to handle or throw it. Which solution is better? Or what would be the best solution?

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• How to pass the parameter in SQL query from PowerShell

  - by Zshava

  I have this code in PowerShell, that executes SQL query for UPDATE table: $Connection=new-object data.sqlclient.sqlconnection "server=server;database=mydb;trusted_connection=true;" $Connection.open() For( $i = 0; $i -le $ActID.Length; $i ++ ){ $cmd = New-Object System.Data.SqlClient.SqlCommand $cmd.Connection = $Connection $cmd.CommandText = " update Table set Note = @PATH " $cmd.Parameters.Add("@PATH", $ActID[$i].Values) | Out-Null $cmd.ExecuteNonQuery() } I try to update table with variable defined in this string: $cmd.Parameters.Add("@PATH", $ActID[$i].Values) | Out-Null But when i try to execute script, error log says that there is no value passed in $ActID[$i] Is there other methods to pass parameters (variables) in powershell queries?

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• Using one sqlconnection/sqlcommand through 2 DB-bound methods

  - by dotnetdev

  I have a class with a method which gets data from a database through a SELECT stored proc. This method uses a SqlDbReader by returning ExecuteReader() on a SqlCommand. The connection and everything is made in this method, with fields (such as connection string) set as class level fields. I now need to populate an array based on the results of this query (so the columns of each row will go into the array with its own index). However, this query will not select all of the data from one table which is involved. I can write the queries to get what I need, but how can I use one connection throughout the class? If I instantiate the connection object and call Open() in the constructor, I get an exception @ runtime. I'm hoping for something like this: // At class level: sqlconn.Open(); // sqlcommand set up Method() { // Fire stored proc // Insert results in a collection } Method2() { // Pass same collection in (use same one), // Add new row columns into same collection } How can I do this with strict performance in mind? Thanks

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• Remote host: can tracert, can telnet, can*not* browse: what gives?

  - by MacThePenguin

  One of my customers of the company I work for has made a change to their Internet connection, and now we can't connect to them any more from our LAN. To help me troubleshoot this issue, the network guy on the customer's site has configured their firewall so that a HTTPS connection to their public IP address is open to any IP. I should put https://<customer's IP> in my browser and get a web page. Well, it works from any network I've tried (even from my smartphone), just not from my company's LAN. I thought it may be an issue with our firewall (though I checked its rules and it allows outbound TCP port 443 to anywhere), so I just connected a PC directly to the network connection of our provider, bypassing out firewall completely, and still it didn't work (everything else worked). So I asked for help to our Internet provider's customer service, and they asked me to do a tracert to our customer's IP. The tracert is successful, as the final hop shown in the output is the host I want to reach. So they said there's no problem. :( I also tried telnet <customer's IP> 443 and that works as well: I get a blank page with the cursor blinking (I've tried using another random port and that gives me an error message, as it should). Still, from any browser of any PC in my LAN I can't open that URL. I tried checking the network traffic with Wireshark: I see the packages going through and answers coming back, thought the packets I see passing are far less than they are if I successfully connect to another HTTPS website. See the attached screenshot: I had to blur the IPs, anyway the longer string is my PC's local IP address, the shorter one is the customer's public IP. I don't know what else to try. This is the only IP doing this... Any idea what could I try to find a solution to this issue? Thanks, let me know if you need further details. Edit: when I say "it doesn't work" I mean: the page doesn't open, the browser keeps loading for a long time and eventually shows an error saying that the page cannot be opened. I'm not in my office now so I can't paste the exact message, but it's the usual message you get when the browser reaches its timeout. When I say "it works", I mean the browser loads and shows a webpage (it's the logon page for the customers' firewall admin interface: so there's the firewall brand's logo and there are fields to enter a user id and a password). Update 13/09/2012: tried again to connect to the customer's network through our Internet connection without a firewall. This is what I did: Run a Kubuntu 12.04 live distro on a spare laptop; Updated all the packages I could and installed WireShark; Attached it to my LAN and verified that I couldn't open https://<customer's IP>. Verified that the Wireshark trace for this attempt was the same as the one I've already posted; Verified that I could connect to another customer's host using rdesktop (it worked); Tried to rdesktop to <customer's IP>, here's the output: kubuntu@kubuntu:/etc$ rdesktop <customer's IP> Autoselected keyboard map en-us ERROR: recv: Connection reset by peer Disconnected the laptop from the LAN; Disconnected the firewall from the Extranet connection, connected the laptop instead. Set its network configuration so that I could access the Internet; Verified that I could connect to other websites in http and https and in RDP to other customers' hosts - it all worked as expected; Verified that I could still traceroute to <customer's IP>: I could; Verified that I still couldn't open https://<customer's IP> (same exact result as before); Checked the WireShark trace for this attempt and noticed a different behaviour: I could see packets going out to the customer's IP, but no replies at all; Tried to run rdesktop again, with a slightly different result: kubuntu@kubuntu:/etc/network$ rdesktop <customer's IP> Autoselected keyboard map en-us ERROR: <customer's IP>: unable to connect Finally gave up, put everything back as it was before, turned off the laptop and lost the WireShark traces I had saved. :( I still remember them very well though. :) Can you get anything out of it? Thank you very much. Update 12/09/2012 n.2: I followed the suggestion by MadHatter in the comments. From inside the firewall, this is what I get: user@ubuntu-mantis:~$ openssl s_client -connect <customer's IP>:443 CONNECTED(00000003) If I now type GET / the output pauses for several seconds and then I get: write:errno=104 I'm going to try the same, but bypassing the firewall, as soon as I can. Thanks. Update 12/09/2012 n.3: So, I think ISA Server is altering the results of my tests... I tried installing Wireshark directly on the firewall and monitoring the packets on the Extranet network card. When the destination is the customer's IP, whatever service I try to connect to (HTTPS, RDP or SAProuter), I can only see outbound packets and no response packets whatsoever from their side. It looks like ISA Server is "faking" the remote server's replies, that's why I get a connection using telnet or the openSSL client. This is the wireshark trace from inside our LAN: But this is the trace on the Extranet network card: This makes a bit more sense... I'll send this info to the customer's tech and see if he can make anything out of it. Thanks to all that took the time to read my question and post suggestions. I'll update this post again.

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• Help needed to resolve RMI RemoteException

  - by Gabriel Parenza

  Hello friends, Any idea why do I get RemoteException while trying to invoke methods on Unix machine from Windows. I am inside the network and dont think this is because of firewall problem as I can do "telnet" from Windows to Unix box after starting the RMI server at the unix box. I also could not understand why is it going to local loopback IP? Stack Trace:: RemoteException occured, details java.rmi.ConnectException: Connection refused to host: 127.0.0.1; nested exception is: java.net.ConnectException: Connection refused: connect java.rmi.ConnectException: Connection refused to host: 127.0.0.1; nested exception is: java.net.ConnectException: Connection refused: connect Many thanks in advance.

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• System.Data.OracleClient requires Oracle client software version 8.1.7 or greater

  - by sachin kulkarni

  I have installed Oracle client version 10g on my PC(Registry ORACLE_BASE-D:\oracle\product\10.2.0). I have added below references. System.Data.OracleClient. I am getting above mentioned error. Below is the Code Snippet . public static OracleConnection getConnection() { try { dataSource = new SqlDataSource(); dataSource.ConnectionString = System.Configuration.ConfigurationManager.AppSettings.Get("conn"); OracleConnection connection = new OracleConnection(); if (dataSource == null) { // Error during initialization of InitialContext or Datasource throw new Exception("###### Fatal Exception ###### - DataSource is not initialized.Pls check the stdout/logs."); } else { connection.ConnectionString = dataSource.ConnectionString; connection.Open(); } return connection; }catch (Exception ex) { throw ex; } } Please let me know what are the areas of Concern and where Iam missing.I am new for the combination of Oracle and Asp.Net.

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• Connect to internet with Qt for symbian

  - by Martin

  I'm creating a Qt Symbian application and need to connect to internet. In some way I need to let the user choose a connection when the app starts. I could use Qt Mobility to get it working but when Nokia approves I wan't do publish my application on Ovi Store. As the Qt Mobility is not included in Qt 4.6 it might be a problem to publish my app later. So for this reason I'm thinking of using native APIs instead. The idea is to use: qt_SetDefaultIap() to set the connection on start. I have been looking at this to actually understand what it is doing. If I have two connections that the app could use, one with WIFI and one through mobile internet, which one will qt_SetDefaultIap() choose? And can I in some way with native api make the user choose a connection on start up? (qt_SetDefaultIap seems to just set a default connection on its own, without user choice) Thanks!

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• Unable to make 2 parallel TCP requests to the same TCP Client

  - by soldieraman

  Error: Unable to read data from the transport connection: A blocking operation was interrupted by a call to WSACancelBlockingCall Situation There is a TCP Server My web application connects to this TCP Server Using the below code: TcpClientInfo = new TcpClient(); _result = TcpClientInfo.BeginConnect(<serverAddress>,<portNumber>, null, null); bool success = _result.AsyncWaitHandle.WaitOne(20000, true); if (!success) { TcpClientInfo.Close(); throw new Exception("Connection Timeout: Failed to establish connection."); } NetworkStreamInfo = TcpClientInfo.GetStream(); NetworkStreamInfo.ReadTimeout = 20000; 2 Users use the same application from two different location to access information from this server at the SAME TIME Server takes around 2sec to reply Both Connect But One of the user gets above error "Unable to read data from the transport connection: A blocking operation was interrupted by a call to WSACancelBlockingCall" when trying to read data from stream How can I resolve this issue? Use a better way of connecting to the server Can't because it's a server issue if a server issue, how should the server handle request to avoid this problem

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• Error invoking stored procedure with input parameter from ADO.Net

  - by George2

  Hello everyone, I am using VSTS 2008 + C# + .Net 3.5 + ADO.Net. Here is my code and related error message. The error message says, @Param1 is not supplied, but actually it is supplied in my code. Any ideas what is wrong? System.Data.SqlClient.SqlException: Procedure or function 'Pr_Foo' expects parameter '@Param1', which was not supplied. class Program { private static SqlCommand _command; private static SqlConnection connection; private static readonly string _storedProcedureName = "Pr_Foo"; private static readonly string connectionString = "server=.;integrated Security=sspi;initial catalog=FooDB"; public static void Prepare() { connection = new SqlConnection(connectionString); connection.Open(); _command = connection.CreateCommand(); _command.CommandText = _storedProcedureName; _command.CommandType = CommandType.StoredProcedure; } public static void Dispose() { connection.Close(); } public static void Run() { try { SqlParameter Param1 = _command.Parameters.Add("@Param1", SqlDbType.Int, 300101); Param1.Direction = ParameterDirection.Input; SqlParameter Param2 = _command.Parameters.Add("@Param2", SqlDbType.Int, 100); portal_SiteInfoID.Direction = ParameterDirection.Input; SqlParameter Param3 = _command.Parameters.Add("@Param3", SqlDbType.Int, 200); portal_RoleInfoID.Direction = ParameterDirection.Input; _command.ExecuteScalar(); } catch (Exception e) { Console.WriteLine(e); } } static void Main(string[] args) { try { Prepare(); Thread t1 = new Thread(Program.Run); t1.Start(); t1.Join(); Dispose(); } catch (Exception ex) { Console.WriteLine(ex.Message + "\t" + ex.StackTrace); } } } Thanks in advance, George

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• Why release the NSURLConnection instance in this statement?

  - by aquaibm

  I read this in a book. -(IBAction) updateTweets { tweetsView.text = @""; [tweetsData release]; tweetsData = [[NSMutableData alloc] init]; NSURL *url = [NSURL URLWithString:@"http://twitter.com/statuses/public_timeline.xml" ]; NSURLRequest *request = [[NSURLRequest alloc] initWithURL: url]; NSURLConnection *connection = [[NSURLConnection alloc] initWithRequest:request delegate:self]; [connection release]; [request release]; [activityIndicator startAnimating]; } In this statement,is that correct to release the "connection" instance at that time? After releasing it which means this NSURLConnection instance will be destroyed since it's reference count is 0 ,how are we going to make this connection operation work? THANKS.

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• Modifying jQuery ajax request Connectino header

  - by Pat

  I'm trying to modify the Connection header with the following code with no success jQuery.ajax ( { url: URL, async: boolVariable, beforeSend: function(xhr) { xhr.setRequestHeader("Connection", "close"); } } ) The request headers via Firebug show: Connection keep-alive X-Requested-With XMLHttpRequest Any odd bugs/problems with setting this particular header known? Or is there something I'm doing wrong?

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