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  • gethostname() returns accurate hostname, bind() doesn't like it

    - by user2072848
    Doing a python socket tutorial, entire codebase is as follows import socket as so s = so.socket() host = so.gethostname() port = 12345 s.bind((host, port)) s.listen(5) while True: c, addr = s.accept() print 'Got connection from', addr c.send('Thank you for connecting') c.close() and error message: Traceback (most recent call last): File "server.py", line 13, in <module> s.bind((host, port)) File "/Users/solid*name*/anaconda/lib/python2.7/socket.py", line 224, in meth return getattr(self._sock,name)(*args) socket.gaierror: [Errno 8] nodename nor servname provided, or not known Printing hostname gives me super*name* Which is, in fact, my computer's hostname.

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  • Can squid forward DNS queries to a DNS server?

    - by pravin
    This might something be completely impossible to achieve, but before I give it a shot thought I might get some advice from a fellow geek. Would squid proxy DNS queries as well? I would like to forward DNS queries to go through squid and use squid's DNS error page, of course by customizing it. I see the DNS queries are hitting my squid box on UDP port 53. I can setup a port forwarding so that all these queries get sent to squid's port 3128. But would squid understand its a DNS query and forward those queries to the dns server set in squid.conf? I hope my question is clear but please shout up and I would be glad to give you some more info if needed. Thanks guys!

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  • libxml2dom and parsing

    - by Ockonal
    Hello, I have the html-content in some python-variable. Is it possible to use DOM for it? As I understand, libxml2dom is the tool for this. And about question. In my html there is div with id = 'some_needed_block'. In python-script: pageData = someHandler.read() pageDOM = libxml2dom.parseString(pageData, html=1) print pageDOM -> <libxml2dom.Document object at 0x2d160d0> block = pageDOM.getElementById('some_needed_block') print block -> <libxml2dom.Node object at 0xf5d1d0> def collect_text(node): s = "" for child_node in node.childNodes: if child_node.nodeType == child_node.TEXT_NODE: s += child_node.nodeValue else: s += collect_text(child_node) return s collect_text(block) -> for child_node in node.childNodes: -> AttributeError: 'NoneType' object has no attribute 'childNodes'

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  • How to Automatically re-raise Exceptions

    - by Brian
    If you wrap a call to HttpResponse.End within a try catch block, the ThreadAbortException would automatically be re-raised. I assume this is the case even if you wrap the try catch block in a try catch block. How can I accomplish the same thing? I do not have a real-world application for this. namespace Program { class ReJoice { public void End() //This does not automatically re-raise the exception if caught. { throw new Exception(); } } class Program { static void Main(string[] args) { try { ReJoice x = new ReJoice(); x.End(); } catch (Exception e) {} } } }

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  • SSIS FTP task connection error

    - by swapna
    Hi, I have a FTP connection manager in SSIS. I have configured it with serevr IP, port number, user name, and password. It was working fine. But suddenly its stopped working. But i am able to login directly to the FTP web site directly .It was not working temporarily.But now its working with same login credentials. But my FTP connection manager in SSIS is unable to connect to the server. with following Error message "connection cannot be established.server name ,port number ,credentials may be invalid" What could be the reason? I have checked servername,port and login credentials all are same. Note: This is a ssl ftp website(https://xxx.xx.xx.com/) Some one please look into this isssue and provide a solution. Thanks SNA

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  • Active printer problem in Printing word document through VB.net

    - by sweety
    Hi My printer name is \\abc\First Floor A-Block its taking name \abc\First Floor A-Block on NE04:. How should i print it Private oWord As Word.Application Dim lobjDoc As Word.Document Dim strFolder as String Dim pd As New PrintDocument Dim strPrintername as String oWord = CreateObject("Word.Application") oWord.DisplayAlerts = Word.WdAlertLevel.wdAlertsNone oWord.ActivePrinter =strPrintername strFolder="D:\testdoc.prn" ' Here I am giving the printer name which is on network, But its taking name \abc\First Floor A-Block on NE04: lobjDoc = oWord.Documents.Open(CType(strFolder, Object)) lobjDoc.PageSetup.FirstPageTray = Word.WdPaperTray.wdPrinterAutomaticSheetFeed lobjDoc.PageSetup.OtherPagesTray = Word.WdPaperTray.wdPrinterAutomaticSheetFeed lobjDoc.PrintOut(Background:=False, Append:=False, OutputFileName:=strFolder, PrintToFile:=True) 'here its giving error about printer settings lobjDoc.Close(SaveChanges:=False) Is there any way to print word document with all its content through PrintDocument? thanks

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  • OpenLayers: Raise event when map is zoomed or moved by user

    - by David Pfeffer
    I'm using OpenLayers to display OpenStreetMap maps. (Though, I'd assume this should be general enough to work for any map product...) I'm displaying some very sophisticated vector overlays, and the amount and resolution of the features I'm returning from the server via GeoJSON to overlay has proven too much for many computers. What I'd like to do now instead is to only send data befitting the resolution of the current zoom, and fitting the current view port. This should be relatively easy to do using the GetResolution and CalculateBounds methods on the Map object. However, I don't know when to call these methods because I can't find a way to register a function to be called when the user pans the map (changing the view port) or zooms the map (changing the resolution and view port). How can I get a callback when the user pans or zooms the map?

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  • C SIGSEGV Handler & Mprotect

    - by pws5068
    I'm constructing a program which uses mprotect() to restrict a block of memory from accessing. When the memory is requested, a SIGSEGV is thrown which I listen for using a signal() call. Once the SIGSEGV has been detected, I need to somehow access the pointer to the memory that was requested (that threw the fault) and the size of the segment requested. Is this possible? void fifoSigHandler(){ // Needs to only remove protection from requested block of virtual memory mprotect(fifoVm,(size_t)fifoVm_size,PROT_WRITE); printf("Caught Seg Fault"); } void fifo_init(void* vm, int vm_size, int n_frames, int page_size) { fifoVm = vm; fifoVm_size = vm_size; fifoFrames = n_frames; fifoPageSize = page_size; mprotect(fifoVm,(size_t)fifoVm_size,PROT_NONE); signal(SIGSEGV, fifoSigHandler); } Additionally, is there a way to determine the level of mprotect() a block of memory is currently assigned (PROT_NONE,PROT_READ, etc..)?

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  • How do you interface with a USB to Parallel adapter?

    - by Hans
    I'm currently doing a project where I have to interact with a circuit I made through the parallel port of a computer. However, my computer doesn't have a parallel port so I borrowed a Parallel to USB adapter cable. The cable didn't come with any drivers, but it's recognized by the device manager as a "USB Printing Support" controller, under the USB section. It seems that old parallel printers can be plugged in and work properly without any problems. So my question is, if I write a program in Java that tries to interact with a parallel port directly, will it work? And if not, can anyone give me some pointers as to what I need to do to interact with it? Thanks.

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  • Windows.Networking.EndpointPair constructor parameters

    - by ComFreek
    I want to create a new EndpointPair object: // hostname is a string // port is an integer var endpointPair = new Windows.Networking.EndpointPair(null, null, hostname, port); But I always get this error: 0x800a000d - JavaScript runtime error: Type mismatch I've already tried the following: converting port to a string passing "" instead of null for the first two Parameters. (null should be okay if the documentation here, under the section Remarks, is right) passing no Parameters, but that ends up in an "too few parameters" error message Above all, the documentation about the constructor has been removed (as of September 4, 2012): http://msdn.microsoft.com/en-us/library/windows/apps/windows.networking.endpointpair.endpointpair.aspx

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  • Access Adobe InDesign files

    - by PeterMmm
    I need some directions for the following problem: I have a lot of InDesign files and i have to setup a process that will track if a certain paragraph or text block has changed between diferent versions of the file. If the text block has changed i want to extract that text block in a "portable" format (html, pdf, txt). Is there an Adobe product that would do that ? Is there any public API to access an InDesign file ? Is there the posibility to export InDesign to, say, html ?

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  • By-Name-Parameters for Constructors

    - by hotzen
    Hello, coming from my other question is there a way to get by-name-parameters for constructors working? I need a way to provide a code-block which is executed on-demand/lazy/by-name inside an object and this code-block must be able to access the class-methods as if the code-block were part of the class. Following Testcase fails: package test class ByNameCons(code: => Unit) { def exec() = { println("pre-code") code println("post-code") } def meth() = println("method") def exec2(code2: => Unit) = { println("pre-code") code2 println("post-code") } } object ByNameCons { def main(args: Array[String]): Unit = { val tst = new ByNameCons { println("foo") meth() // knows meth() as code is part of ByNameCons } tst.exec() // ByName fails (executed right as constructor) println("--------") tst.exec2 { // ByName works println("foo") //meth() // does not know meth() as code is NOT part of ByNameCons } } } Output: foo method pre-code post-code -------- pre-code foo post-code

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  • GWT Custom Events

    - by Ciarán
    Hey I have a problem getting my head around how custom GWT event Handlers work. I have read quite a bit about the topic and it still is some what foggy. I have read threads here on Stackoverflow like this one http://stackoverflow.com/questions/998621/gwt-custom-event-handler.Could someone explain it in an applied mannar such as the following. I have 2 classes a block and a man class. When the man collides with the block the man fires an event ( onCollision() ) and then the block class listens for that event. Thanks

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  • What does class_eval <<-"end_eval", __FILE__, __LINE__ mean in Ruby?

    - by viatropos
    I'm learning how to use class_eval in modules (I'm somewhat familiar with class_eval) and came across this helpful class in resource_controller. In there they have things like this: class_eval <<-"end_eval", __FILE__, __LINE__ def #{block_accessor}(*args, &block) unless args.empty? && block.nil? args.push block if block_given? @#{block_accessor} = [args].flatten end @#{block_accessor} end end_eval What does __FILE__ and __LINE__ do in that context? I know __FILE__ references the current file, but what does that whole thing do exactly? Don't really know how to search for that :).

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  • How to make socket.listen(1) work for some time and then continue rest of code???

    - by Rami Jarrar
    I'm making server that make a tcp socket and work over port range, with each port it will listen on that port for some time, then continue the rest of the code. like this:: import socket sck = socket.socket(socket.AF_INET, socket.SOCK_STREAM) sck.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1) msg ='' ports = [x for x in xrange(4000)] while True: try: for i in ports: sck.bind(('',i)) ## sck.listen(1) ## make it just for some time and then continue this ## if there a connection do this conn, addr = sck.accept() msg = conn.recv(2048) ## do something ##if no connection continue the for loop conn.close() except KeyboardInterrupt: exit() so how i could make sck.listen(1) work just for some time ??

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  • How could I get informations about the SIM card on Windows CE

    - by jeleb
    Hello, I am using a device running on WindowsCE 5.00. I cannot connect the GPRS, there is an error message telling that the port cannot be opened and may be in use by another application. I am not sure but I think the port it is talking about is a comp port to the SIM card that cannot be opened because the SIM doesn't work anymore. To tell the truth, it is likely that one of my coworker did lock the SIM and kept his mouth shut ... How could I get any information about the SIM on Windows CE ? I am new at this and Windows CE is not really user friendly ... I have been strongly searching this on internet but didn't find anything. Any kind of information will be welcomed. Thanks,

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  • Detecting incorrect key using AES/GCM in JAVA

    - by 4r1y4n
    I'm using AES to encrypt/decrypt some files in GCM mode using BouncyCastle. While I'm proving wrong key for decryption there is no exception. How should I check that the key is incorrect? my code is this: SecretKeySpec incorrectKey = new SecretKeySpec(keyBytes, "AES"); IvParameterSpec ivSpec = new IvParameterSpec(ivBytes); Cipher cipher = Cipher.getInstance("AES/GCM/NoPadding", "BC"); byte[] block = new byte[1048576]; int i; cipher.init(Cipher.DECRYPT_MODE, incorrectKey, ivSpec); BufferedInputStream fis=new BufferedInputStream(new ProgressMonitorInputStream(null,"Decrypting ...",new FileInputStream("file.enc"))); BufferedOutputStream ro=new BufferedOutputStream(new FileOutputStream("file_org")); CipherOutputStream dcOut = new CipherOutputStream(ro, cipher); while ((i = fis.read(block)) != -1) { dcOut.write(block, 0, i); } dcOut.close(); fis.close(); thanks

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  • Opacity in CSS, some doubts

    - by André
    Hi, I have some doubts with opacity in CSS. I have a Header and a Footer that uses opacity, but I would like to turn off opacity the opacity in the text. Is that possible? To a better understanding I will post the code. <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en"> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /> <title> stu nicholls | CSS PLaY | cross browser fixed header/footer layout basic method </title> <style type="text/css" media="screen"> #printhead {display:none;} html { height:100%; max-height:100%; padding:0; margin:0; border:0; background:#fff; font-size:80%; font-family: "trebuchet ms", tahoma, verdana, arial, sans-serif; /* hide overflow:hidden from IE5/Mac */ /* \*/ overflow: hidden; /* */ } body {height:100%; max-height:100%; overflow:hidden; padding:0; margin:0; border:0;} #content {display:block; height:100%; max-height:100%; overflow:hidden; padding-left:0px; position:relative; z-index:3; word-wrap:break-word;} #head {position:absolute; margin:0; top:0; right:18px; display:block; width:100%; height:1; background-color:transparent; font-size:1em; z-index:5; color:#000; border-bottom:1px solid #000;} #foot {position:absolute; margin:0; bottom:-1px; right:18px; display:block; width:100%; height:30px; background-color:transparent; color:#000; text-align:right; font-size:2em; z-index:4; border-top:1px solid #000;} .pad1 {display:block; width:18px; height:18px; float:left;} /* Com este "height", alinho a border do header */ .pad2 {display:block; height:100px;} .pad3 {display:block; height:0px;} /* Com este "height" controlo onde começa o content e o scroll do browser */ #content p {padding:5px;} .bold {font-size:1.2em; font-weight:bold;} .red {color:#c00; margin-left:5px; font-family:"trebuchet ms", "trebuchet", "verdana", sans-serif;} h2 {margin-left:5px;} h3 {margin-left:5px;} /* Esta classe controla as caracteristicas do background do footer e do header. */ .bkg { background-color: blue; filter:alpha(opacity=35); /* IE's opacity*/ opacity: 0.35; height: 10; } iframe { border-style: none; width: 100%; height: 100%; } </style> </head> <body> <div id="head"> <div class="bkg"> <div class="pad1"></div>Header </div> </div> <div id="content"> <div class="pad3"></div> <iframe src="http://www.yahoo.com" id="iFrame"></iframe> <div class="pad2"></div> </div> </div> <div id="foot"><div class="bkg">Footer</div></div> </body> </html> I want to maintain the opacity in the blue color in the footer and header but I would like to put the text stronger. Is that possible? Best Regards,

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  • python and paramiko: how to check if end of ssh tunnel is still alive and reestablish if not?

    - by Christian
    Hello all, I'm trying to achieve the following: I have two hosts A and B. A establishes a remote port forwarding tunnel on B, i.e. B is the one a port is forwarded on to some where else and A is the one that sets up the tunnel. I tried the script rforward.py that ships with paramiko and it works very well so far. (I'm running rforward.py on A, which connects to B and forwards a port of B to somewhere else) However, when B is shutting down, A doesn't seem to recognize it. I'd rather like A to recognize that B is down and to try to reestablish the connection periodically in case B comes up again. Is there a way to do this? Thanks.

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  • How do you set rate limit access to your API using Iptables?

    - by Cory
    How can you set rate limit access to API using Iptables. Tried to set limit using port 80, but I don't want to set limit to the web access entirely. Is there a way to specified a subdomain rather than port. Example: set rate limit to api.example.com not example.com? If there is no way to set rate limit by subdomain, what is the suggested rate limit access to port 80 without risking blocking a legitimate web user? One connection per second would be enough?

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  • Ways to call Blocks within Magento: createBlock vs Layout xml file

    - by N. B.
    Context: I'm trying to include Adminhtml blocks in the frontend of the site to replace some of the user account blocks. The first thing I'm trying to do is simply display the block on the correct page. I can replace the entire page by setting the Body of the response inside the controller, but I'm having a hard time including the block in the layout xml file and then calling it within the template. Why would I be able to create an adminhtml/sales_order_grid from Mage_Sales_OrderController using createBlock: $this->getResponse()->setBody($this->getLayout()->createBlock('adminhtml/sales_order_grid')->toHtml()); But not from a frontend layout, using a declaration <block type="adminhtml/sales_order_grid" name="orders_widget"/> within app/design/frontend/default/default/layout/sales.xml The latter produces an error without a stack trace: Fatal error: Call to a member function toHtml() on a non-object in app/code/core/Mage/Core/Model/Layout.php on line 526 Thanks for any guidance!

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  • css, jquery issue

    - by wadada
    I was playing with Infogrid on my site. I added a header, a footer and added some text on the last block of iron man. As you can see the footer doesn't show up and the text of the last block is cut off. Now if you remove overflow:hidden; on the body, html the footer shows up but the text is still cut off. Any idea on how this the footer could show up without the scrollbar (so overflow:hidden; has to stay) and how to get the text of the last block to show up entirely? Thanks in advance and have fun :) wadada

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  • Effective methods for reading and writing large files in C

    - by Bertholt Stutley Johnson
    I'm writing an application that deals with very large user-generated input files. The program will copy about 95 percent of the file, effectively duplicating it and switching a few words and values in the copy, and then appending the copy (in chunks) to the original file, such that each block (consisting of between 10 and 50 lines) in the original is followed by the copied and modified block, and then the next original block, and so on. The user-generated input conforms to a certain format, and it is highly unlikely that any line in the original file is longer than 100 characters long. Which would be the better approach? a) To use one file pointer and use variables that hold the current position of how much has been read and where to write to, seeking the file pointer back and forth to read and write; or b) To use multiple file pointers, one for reading and one for writing. I am mostly concerned with the efficiency of the program, as the input files will reach up to 25,000 lines, each about 50 characters long. Thanks!

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  • java checked exception in a catch clause compilation error

    - by srandpersonia
    Hi, I was expecting an compilation error in the following program because of the throw statement in the catch block as IOException is a checked exception and it is not caught by another try block within the catch block. But I am getting "Hurray!" printed. Any explanation would be much appreciated. According to JLS 11.2.3, http://java.sun.com/docs/books/jls/third_edition/html/exceptions.html It is a compile-time error if a method or constructor body can throw some exception type E when both of the following hold: * E is a checked exception type * E is not a subtype of some type declared in the throws clause of the method or constructor. import java.io.*; public class Test{ public static void main(String args[]) { System.out.println(method()); } public static int method() { try{ throw new Exception(); } catch(Exception e){ throw new IOException(); //No compile time error } finally{ System.out.println("Hurray!"); } } } Thanks in advance.

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  • want to change background of table td on hover

    - by Brad
    I have a webpage that displays a calendar, and I want to change the background-color of any td that has their day number linked, so when I hover over that day, it changes the background-color. I thought this would work: .main-calendar td { width:14%; height:100px; text-align:center; border:1px solid #000; font-size:20px; vertical-align:middle; display:block; } table.main-calendar td a:hover, table.main-calendar td a:visited { display:block; text-decoration:none; background-color:red; color:#fff; } table.main-calendar td a:link { display:block; text-decoration:none; background-color:green; color:#fff; } Any help is appreciated.

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