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  • What is the difference between remote procedure call and web service

    - by xiao
    Is there any clear definition about RPC and Web Service? A quick wikipedia search shows: RPC: Remote procedure call (RPC) is an Inter-process communication technology that allows a computer program to cause a subroutine or procedure to execute in another address space (commonly on another computer on a shared network) without the programmer explicitly coding the details for this remote interaction. Web Service: Web services are typically application programming interfaces (API) or web APIs that are accessed via Hypertext Transfer Protocol and executed on a remote system hosting the requested services. Web services tend to fall into one of two camps: Big Web Services[1] and RESTful Web Services. I am not quite clear what the real difference between the two things. It seems that one thing could belongs to RPC and is kind of web service at the same time. Is Web Service a higher level representation of RPC?

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  • Communication via internet in Java

    - by Stuart
    What I mean is like servers on video games. You can run an application and it will set up a server on your computer with an IP and a port. For example, how would you make an application where one host application sets up a thing where it has an IP and a port, and another computer that has access to the internet as well can type in the IP and port and it would be able to communicate with the host? I mean simple communication, like sending a boolean or String. And would there be any security problems that would be needed to fix?

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  • What to see in India as a developer and student

    - by lasseespeholt
    Hi, I'm planning a trip to India around July-August. And I want to hear Indian developers or developers traveled to India if there are something interesting to see in India (around Bombay) for developers in general. Maybe a conference etc. I have looked at http://www.conferencealerts.com/computing.htm I have studied computer science in a year now but have been a spare time and independent developer for some years now. Furthermore, I have tried finding summer courses but that is properly too late now and computer science summer courses is hard to find in India. Best regards, Lasse Espeholt

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  • How do I generate (and label) a random integer with python 3.2?

    - by An hero
    Okay, so I'm admittedly a newbie to programming, but I can't determine how to get python v3.2 to generate a random positive integer between parameters I've given it. Just so you can understand the context, I'm trying to create a guessing-game where the user inputs parameters (say 1 to 50), and the computer generates a random number between the given numbers. The user would then have to guess the value that the computer has chosen. I've searched long and hard, but all of the solutions I can find only tell one how to get earlier versions of python to generate a random integer. As near as I can tell, v.3.2 changed how to generate and label a random integer. Anyone know how to do this? Thanks!

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  • COM+ Applications returns an error when when I try to add a new application

    - by Baright
    Error message returned 'An error occurred while processing the last operation. Error code 800401154 - Class not registered The event log may contain additional troubleshooting information.' The other thing is, the is a red arrow icon displayed over My Computer (Component Servers - Computers - My Computer). I have searched everywhere for this, but I couldnt find a solution that resolves my specific problem. Im using VISTA and this error started after I reinstalled my SQL server 2008. I have 2 dll that I need to add but I cannot, because of this error.

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  • Consuming Web Service via Windows Authentication

    - by saravanaram
    I am just trying to consuming a web service in remote computer using windows authentication however login credentials are different in local & remote computer. Code Snippet: Dim objproxy As New WebReference.Service1 'Create a new instance of CredentialCache. Dim mycredentialCache As CredentialCache = New CredentialCache() 'Create a new instance of NetworkCredential using the client Dim credentials As NetworkCredential = New NetworkCredential("username", "pwd","domain") 'Add the NetworkCredential to the CredentialCache. 'mycredentialCache.Add(New Uri(objproxy.Url), "Basic", credentials) objproxy.Credentials = credentials It is timing out but when i use mycredentialCache.Add(New Uri(objproxy.Url), "Basic", credentials) I get "401 Unauthorized" message, Please assist.

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  • C++ networking simple send and receive

    - by Wallter
    I'm trying to link 10 computers together, the program i would like to write would have one 'control' computer. From what I've looked up this computer would take all the packets sent over the network and do a echo with them... right? The other computers would need to be able to send information (then echoed to the others) to the 'control' ... is there a easy! or simple way to do this? From what I've seen i want a non-blocking socket? I have looked into sockets and such but for an armature programmer like me, this seems like a daunting task :) I'm kind-of looking for an easy class implication that has a send() and an event driven recv(). I'm not going to be sending that much information over the network.

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  • why don't more programming languages have builtin interfaces to the window manager?

    - by Naveen
    Programming is at the heart about automating tasks on a computer. Presumably those tasks would normally be done manually by a human. Humans use the computer through the keyboard, mouse, and interaction with the console or the window manager. But very few languages have built in functions that provide an interface to these basic computing objects. A notable exception is autohotkey, an open source language on windows, providing builtin functions that allow the following simple tasks: * Get Pixel Information * Get mouse position * Keyboard macros * Simulate key strokes * Simulate mouse click * Window management See examples on rosettacode. There have been various attempts on linux, many of which were stopped without explanation. One is the inactive tcl library: android. Search google code for android, lang:tcl

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  • VBScript Writing to Server Text File

    - by Keyfer Mathewson
    I have created a VBScript which pulls the service tag, username, and computer name from a computer. What I need to do now is compile this information in a text document. How it's set up is as follows: We have an Active Directory Server, with a folder for login scripts. I have created a batch file to run this .vbs script, and the script works well so far. What I now need is for a file on the AD server, called "logging.txt", to be populated with the information that is created with the .vbs script. This is the script I have so far: 'Get Dell Service Tag Info set ProSet = GetObject("winmgmts:").InstancesOf("Win32_BIOS") Set ProSet1 = GetObject("winmgmts:").InstancesOf("Win32_SystemEnclosure") For each Pro in ProSet For each Pro1 in ProSet1 ServiceTag=Pro.SerialNumber wscript.echo ServiceTag exit for Next exit for Next 'get username and computername, could also be asked in a batch Set oShell = WScript.CreateObject("WScript.Shell") Set oShellEnv = oShell.Environment("Process") sComputerName = oShellEnv("ComputerName") sUsername = oShellEnv("username") wscript.echo sComputerName & " " & sUsername Thank you very much in advance!

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  • Virus - How much it can affect?

    - by Sarang
    In our daily life, we come across various Viruses. In this internet world, we do have lots of type of viruses come to visit us ! While for the beginners, Virus is a complicated matter to fight with. Please explain the way how the virus come flow across the PC using Internet. What are the ways to search for them in the Personal Computer ? Also, we do have various solutions available in the market of Anti-Viruses, but also have different comments available for different software. Which is actually, really a useful Anti-Virus in the market that can give reliable performance ? Every Personal Computer connected to internet has to face against the viruses. Isn't there any general solution using Internet itself through which all networked computers get protected against Viruses ? Please give any solution.

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  • nginx doesn't parse php request

    - by lzyy
    env: ubuntu 9.10 / use gotdeb source / php version 5.3.1 / php5-fpm installed / php5-fpm is running , and listening 9000 port test by 2 commands below pgrep php5-fpm telnet localhost 9000 however if I visit from anthor computer in LAN ,using this address http://192.168.1.103/index.php the browser ask me to save this index.php , but if visit index.php , everything goes well sites-enabled/default file content env: ubuntu 9.10 / use gotdeb source / php version 5.3.1 / php5-fpm installed / php5-fpm is running , and listening 9000 port test by 2 commands below pgrep php5-fpm telnet localhost 9000 however if I visit from anthor computer in LAN ,using this address http://192.168.1.103/index.php the browser ask me to save this index.php , but if visit index.html , everything goes well sites-enabled/default file content location ~ \.php$ { fastcgi_pass 127.0.0.1:9000 fastcgi_index index.php fastcgi_param SCRIPT_FILENAME /var/www/$fastcgi_script_name include fastcgi_params }

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  • Send and receive data trough the power network

    - by luvieere
    I'm not interested in a hardware solution, I want to know about software that may "read" modulated signal received trough the power supply - some sort of a low-level driver that would access the power signal in a convenient place and demodulate it. Is there a way to receive signal from the computer's power supply? I'm interested in an API or library that would allow the computer to be seen as a node in a Power Line Communication network and receive data directly through the power cable, without the need for a converter. Is there any active research in this field? Edit: There is software that reads monitors and displays internal component voltages - DC voltage after being converted and filtered by the power supply - now I need is a method of data encoding that would be invariant to conversion and filtering, the original signal embedded in AC being present in some form within the converted DC signal.

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  • How to determine the port numbers for peripherals devices?

    - by smwikipedia
    I know that peripheral devices such as a hard driver, a floppy driver, etc are controlled by reading/writing certain control registers on their device controllers. I am wondering about the following questions: Is it true that when these peripheral devices are plugged onto the computer, the addresses(port numbers) of their control registers are thus determined by how they are attached to the address bus (i.e. the hard-wiring)? Who makes the scheme of the port number assignment? If I was given a naked computer(with no operating system and with many peripheral devices), how could I figure out the port number assignment so I can use them to control peripheral deveices.

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  • Gmail/Facebook/Hotmail not opening in Firefox/IE on Windows 7 Home

    - by singlepoint
    Hi, I am unable to open Gmail/Facebook/Hotmail on Firefox/IE on Widows 7 Home. I just unboxed a brand new hp laptop with Norton Security Suite running inside. I get following error message on Firefox. Please help. The connection has timed out The server at www.google.com is taking too long to respond. * The site could be temporarily unavailable or too busy. Try again in a few moments. * If you are unable to load any pages, check your computer's network connection. * If your computer or network is protected by a firewall or proxy, make sure that Firefox is permitted to access the Web

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  • Can a MAC address be used as a reliable part of a rights management (DRM) scheme?

    - by Jarrod Mosen
    We're currently writing some software that we want to protect. We thought that registering a user's MAC address in a database upon activation of the software seemed viable; we can profile and grab that with a Java applet, (is there a better way?) so getting it isn't too much of a problem. However, we want their computer to only run the application, and download application files/updates from the server when their MAC address has been verified with their one on-file. We understand that this means a lockdown to one computer, but special changes can be made on request. What would be the best way to verify their MAC address, to see if it exists in the database, and then serve them the files to run the application? (And to simply run it on subsequent requests, to prevent re-downloading.)

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  • Programming cookbook? [closed]

    - by user73669
    Possible Duplicate: What is the single most influential book every programmer should read? Hello With sites like The Daily WTF and recurring threads on Slashdot and elsewhere about bad programming, I figured that, to avoid people reinventing the wheel (badly or not), there should be a good, fat book on programming that would go through typical programming problems and show good, known algorithms, either in pseudo-code or some language with an easy syntax so that the language is not an issue. Here's the list of books on the subject I saw at my local computer bookstore. Can you recommend a couple, or add to this list if it's missing better options? The art of computer programming Code complete Masterminds of programming 97 things every programmer should know The passionate programmer Pragmatic thinking & learning Coders at work The algorithm design manual Algorithms and programming How to think about algorithms How to think like a programmer Why programs fail Beautiful data Beautiful code The productive programmer Solid code Write great code Clean code Programming language pragmatics Hello world Learning Processing Learn to program Thank you.

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  • How to determine the port numbers for peripheral devices?

    - by smwikipedia
    I know that peripheral devices such as a hard driver, a floppy driver, etc are controlled by reading/writing certain control registers on their device controllers. I am wondering about the following questions: Is it true that when these peripheral devices are plugged onto the computer, the addresses(port numbers) of their control registers are thus determined by how they are attached to the address bus (i.e. the hard-wiring rules, not any soft things)? Who makes the scheme of the port number assignment? If I was given a naked computer(with no operating system and with many peripheral devices), how could I figure out the port number assignment so I can use them to control peripheral deveices. At last and as usual, thanks for your patience and reply. 8^)

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  • An error occurred creating the form. See Exception.InnerException for details. The error is: Object

    - by Ben
    I get this error when attempting to debug my form, I cannot see where at all the error could be (also does not highlight where), anyone have any suggestions? An error occurred creating the form. See Exception.InnerException for details. The error is: Object reference not set to an instance of an object. Public Class Form1 Dim dateCrap As String = "Date:" Dim IPcrap As String = "Ip:" Dim pcCrap As String = "Computer:" Dim programCrap As String = "Program:" Dim textz As String = TextBox1.Text Dim sep() As String = {vbNewLine & vbNewLine} Dim sections() As String = Text.Split(sep, StringSplitOptions.None) Dim NewArray() As String = TextBox1.Text.Split(vbNewLine) Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click For i = 0 To sections.Count - 1 TextBox2.Text = sections(i) Dim text2 As String = TextBox2.Text Dim sep2() As String = {vbNewLine & vbNewLine} Dim sections2() As String = Text.Split(sep, StringSplitOptions.None) Dim FTPinfo() As String = TextBox2.Text.Split(vbNewLine) Dim clsRequest As System.Net.FtpWebRequest = _ DirectCast(System.Net.WebRequest.Create(sections2(0).Replace("Url/Host:", "")), System.Net.FtpWebRequest) clsRequest.Credentials = New System.Net.NetworkCredential(sections2(1).Replace("Login:", ""), (sections2(2).Replace("Password:", ""))) clsRequest.Method = System.Net.WebRequestMethods.Ftp.UploadFile ' read in file... Dim bFile() As Byte = System.IO.File.ReadAllBytes(txtShellDir.Text) ' upload file... Dim clsStream As System.IO.Stream = clsRequest.GetRequestStream() clsStream.Write(bFile, 0, bFile.Length) clsStream.Close() clsStream.Dispose() Next End Sub Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click ListBox1.Items.Clear() Dim fdlg As OpenFileDialog = New OpenFileDialog() fdlg.Title = "Browse for the FTP List you wish to use." fdlg.InitialDirectory = Application.ExecutablePath fdlg.Filter = "All files (*.txt)|*.txt|txt files (*.txt)|*.txt" fdlg.FilterIndex = 2 fdlg.RestoreDirectory = True If fdlg.ShowDialog() = DialogResult.OK Then 'ListBox1.Items.AddRange(Split(My.Computer.FileSystem.ReadAllText(fdlg.FileName), vbNewLine)) TextBox1.Text = My.Computer.FileSystem.ReadAllText(fdlg.FileName) End If Dim tmp() As String = TextBox1.Text.Split(CChar(vbNewLine)) For Each line As String In tmp If line.Length > 1 Then TextBox1.AppendText(line & vbNewLine) End If Next TextBox1.Text = TextBox1.Text.Replace(" ", "") TextBox1.Text = TextBox1.Text.Replace("----------------------------------------------------------", vbNewLine) For Each item As String In NewArray ListBox1.Items.Add(item) Next Try For i = 0 To ListBox1.Items.Count - 1 If ListBox1.Items(i).Contains(dateCrap) Then ListBox1.Items.RemoveAt(i) End If Next Catch ex As Exception End Try Try For i = 0 To ListBox1.Items.Count - 1 If ListBox1.Items(i).Contains(IPcrap) Then ListBox1.Items.RemoveAt(i) End If Next Catch ex As Exception End Try Try For i = 0 To ListBox1.Items.Count - 1 If ListBox1.Items(i).Contains(pcCrap) Then ListBox1.Items.RemoveAt(i) End If Next Catch ex As Exception End Try Try For i = 0 To ListBox1.Items.Count - 1 If ListBox1.Items(i).Contains(programCrap) Then ListBox1.Items.RemoveAt(i) End If Next Catch ex As Exception End Try TextBox1.Text = "" For Each thing As Object In ListBox1.Items TextBox1.AppendText(thing.ToString & vbNewLine) Next End Sub Private Sub Button4_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) For i = 0 To ListBox1.SelectedItems.Count - 1 TextBox1.Text = TextBox1.Text & ListBox1.Items.Item(i).ToString() & vbNewLine Next End Sub End Class

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  • Error in vb.net windows service when connecting to SQL

    - by Clint
    I've installed a vb.net windows service on a Windows 2008 machine, that is attempting to connect to SQL 2005. The service starts succesfully, but can't see the database. The event log has the following entry. The description for Event ID 0 from source SU4.ESMR.DAL.Job.FillPriorityJobByType(oJobDS, TypeID: 3 cannot be found. Either the component that raises this event is not installed on your local computer or the installation is corrupted. You can install or repair the component on the local computer. This was tested locally on both XP and 2008. All environments are 32 bit.

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  • XML-RPC in CodeIgniter is for creating a API?

    - by ajsie
    I have read some tutorials about creating an API and i wonder if XML-RPC and XML-RPC server in CodeIgniter are for creating this? If yes, what are the benefits of using these classes rather than im just using regular class/methods/params to create my API interface. This is what it said in the documentation: Quite simply it is a way for two computers to communicate over the internet using XML. One computer, which we will call the client, sends an XML-RPC request to another computer, which we will call the server. Once the server receives and processes the request it will send back a response to the client.

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  • How to connect android application running on a device to a local web application?

    - by guna
    I have my droid device connected through USB and using Eclipse for debugging my application running on the device. Everything is fine, except my application needs to connect to a web application running on the same host computer (Windows XP, IE). The web address on the IE was "http://local:4566/MyApp/". I tried to set my android app to "http://10.0.2.2:4566/MyApp", but no luck. The android app's connection simply times out. The document under http://developer.android.com/guide/developing/tools/emulator.html says that the ip address may be different for devices (see Network Address Space section) but no further details on how to find that. Question is, how to I connect to a local web application running on my host computer (windows xp) from an Android application connected through USB running debug under Eclipse? Appreciate any help. thanks, Guna

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  • can't connect Java client to C server.

    - by nexes
    I have a very simple server written in C and an equally simple client written in Java. When I run them both on the same computer everything works, but when I try to run the server on computer A and the client on computer B, I get the error IOException connection refused from the java client. I can't seem to find out whats happening, any thoughts? I've even turned off the firewalls but the problem still persists. server. #include <stdio.h> #include <unistd.h> #include <string.h> #include <sys/types.h> #include <sys/socket.h> #include <netinet/in.h> #define PORT 3557 #define BUF 256 int main(int argc, char *argv[]) { struct sockaddr_in host, remote; int host_fd, remote_fd; int size = sizeof(struct sockaddr);; char data[BUF]; host.sin_family = AF_INET; host.sin_addr.s_addr = htonl(INADDR_ANY); host.sin_port = htons(PORT); memset(&host.sin_zero, 0, sizeof(host.sin_zero)); host_fd = socket(AF_INET, SOCK_STREAM, 0); if(host_fd == -1) { printf("socket error %d\n", host_fd); return 1; } if(bind(host_fd, (struct sockaddr *)&host, size)) { printf("bind error\n"); return 1; } if(listen(host_fd, 5)) { printf("listen error"); return 1; } printf("Server setup, waiting for connection...\n"); remote_fd = accept(host_fd, (struct sockaddr *)&remote, &size); printf("connection made\n"); int read = recv(remote_fd, data, BUF, 0); data[read] = '\0'; printf("read = %d, data = %s\n", read, data); shutdown(remote_fd, SHUT_RDWR); close(remote_fd); return 0; } client. import java.net.*; import java.io.*; public class socket { public static void main(String[] argv) { DataOutputStream os = null; try { Socket socket = new Socket("192.168.1.103", 3557); os = new DataOutputStream(socket.getOutputStream()); os.writeBytes("phone 12"); os.close(); socket.close(); } catch (UnknownHostException e) { System.out.println("Unkonw exception " + e.getMessage()); } catch (IOException e) { System.out.println("IOException caught " + e.getMessage()); } } }

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  • loading an image from a package in Java (JFrame)

    - by Shahar Kazaz
    i'm having a problem loading an image from a package i created in the project that was set to contain images, i have to write the whole picture location in the computer instead of just the package that contains it. i've tried several things but nothing seams to work... where is the command i use to load the image : searchBar = ImageIO.read(new File("C:\\Users\\ASUS\\Documents\\NetBeansProjects\\Project\\src\\Images\\search.jpg")); "Images" is a package in my project , this works, but when i try loading the image without the "C:\..." only with the "\Images..." it doesn't , so i have to change it every time i open this project in another computer. hopefully one of u has the answer for me , thanks in advance for any answer :)

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