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• Array variable initialization error in Java

  - by trinity

  Hello I am trying to write a Java program that reads an input file consisting of URLs, extracts tokens from these, and keeps track of how many times each token appears in the file. I've written the following code: import java.io.*; import java.net.*; public class Main { static class Tokens { String name; int count; } public static void main(String[] args) { String url_str,host; String htokens[]; URL url; boolean found=false; Tokens t[]; int i,j,k; try { File f=new File("urlfile.txt"); FileReader fr=new FileReader(f); BufferedReader br=new BufferedReader(fr); while((url_str=br.readLine())!=null) { url=new URL(url_str); host=url.getHost(); htokens=host.split("\\.|\\-|\\_|\\~|[0-9]"); for(i=0;i<htokens.length;i++) { if(!htokens[i].isEmpty()) { for(j=0;j<t.length;j++) { if(htokens[i].equals(t[j].name)) { t[j].count++; found=true; } } if(!found) { k=t.length; t[k].name=htokens[i]; t[k].count=1; } } } System.out.println(t.length + "class tokens :"); for(i=0;i<t.length;i++) { System.out.println( "name :"+t[i].name+" frequency :"+t[i].count); } } br.close(); fr.close(); } catch(Exception e) { System.out.println(e); } } } But when I run it, it says: variable t not initialized.. What should I do to set it right?

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• Automatic linebreak in WPF label

  - by Vlad

  Dear all, is it possible for a WPF Label to split itself automatically into several lines? In my following example, the text is cropped at the right. <Window x:Class="..." xmlns="..." xmlns:x="..." Height="300" Width="300"> <Grid> <Label> `_Twas brillig, and the slithy toves did gyre and gimble in the wabe: all mimsy were the borogoves, and the mome raths outgrabe.</Label> </Grid> </Window> Am I doing something wrong? Taking other controls is unfortunately not a good option, since I need support of access keys. Replacing the Label with a TextBlock (having TextWrapping="Wrap"), and adjusting its control template to recognize access keys would be perhaps a solution, but isn't it an overkill? Edit: having a non-standard style for label will break skinning, so I would like to avoid it if possible.

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• Why can't I source my vimrc after installing vundle?

  - by John N

  I'm trying to get my Vim to update on the fly after editing vimrc. So I followed the instructions at Vimcast which basically source vimrc every time you hit save. But that doesn't work for some reason (when I save my vimrc it doesn't give any errors), so I decided to run source $HOME/.vimrc manually and here's what I got: -bash: Configuration file for vim set nocompatible : command not found -bash: Plugin Management { filetype off : command not found -bash: .vimrc: line 7: syntax error near unexpected token `(' -bash: .vimrc: line 7: ` call vundle#rc()' And here's my Vim info (I'm running Mac OS X 10.7.3): VIM - Vi IMproved 7.3 (2010 Aug 15, compiled Jul 31 2011 19:27:29) Compiled by [email protected] Normal version without GUI. Features included (+) or not (-): -arabic +autocmd -balloon_eval -browse +builtin_terms +byte_offset +cindent -clientserver -clipboard +cmdline_compl +cmdline_hist +cmdline_info +comments -conceal +cryptv +cscope +cursorbind +cursorshape +dialog_con +diff +digraphs -dnd -ebcdic -emacs_tags +eval +ex_extra +extra_search -farsi +file_in_path +find_in_path +float +folding -footer +fork() -gettext -hangul_input +iconv +insert_expand +jumplist -keymap -langmap +libcall +linebreak +lispindent +listcmds +localmap -lua +menu +mksession +modify_fname +mouse -mouseshape -mouse_dec -mouse_gpm -mouse_jsbterm -mouse_netterm -mouse_sysmouse +mouse_xterm +multi_byte +multi_lang -mzscheme +netbeans_intg -osfiletype +path_extra -perl +persistent_undo +postscript +printer -profile -python -python3 +quickfix +reltime -rightleft -ruby +scrollbind +signs +smartindent -sniff +startuptime +statusline -sun_workshop +syntax +tag_binary +tag_old_static -tag_any_white -tcl +terminfo +termresponse +textobjects +title -toolbar +user_commands +vertsplit +virtualedit +visual +visualextra +viminfo +vreplace +wildignore +wildmenu +windows +writebackup -X11 -xfontset -xim -xsmp -xterm_clipboard -xterm_save system vimrc file: "$VIM/vimrc" user vimrc file: "$HOME/.vimrc" user exrc file: "$HOME/.exrc" fall-back for $VIM: "/usr/share/vim" Compilation: gcc -c -I. -D_FORTIFY_SOURCE=0 -Iproto -DHAVE_CONFIG_H -arch i386 -arch x86_64 -g -Os -pipe Linking: gcc -arch i386 -arch x86_64 -o vim -lncurses Could anybody tell me what's wrong here? Thanks so much!

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• Obtaining MAC address

  - by rink.attendant.6

  According to Obtain client MAC address in ASP.NET Application, it is not possible. I am not entirely convinced because whenever I connect to Tim Hortons WiFi, my MAC address is known. Occasionally, the network is slow and I see this URL like this before being redirected to the Connect page: http://timhortonswifi.com/cp/tdl3/index.asp ?cmd=login &switchip=172.30.129.73 &mac=60:6c:66:17:1a:83 &ip=10.40.66.229 &essid=Tim%20Hortons%20WiFi &apname=TDL-ON-NEP-02177-WAP1 &apgroup=02177 &url=http%3A%2F%2Fweather%2Egc%2Eca%2Fcity%2Fpages%2Fon-72_metric_e%2Ehtml So according to this URL, the site knows the IP address of the router, my MAC address, the IP address assigned to my device by the router, the network SSID, some other pieces of information, and the URL I was trying to access prior to connecting. There's two options: Tim Hortons WiFi Basic and Tim Hortons WiFi Plus, where the "Plus" option allows me to connect to any Tim Hortons WiFi access point in Canada automatically with this device. Registration requires an email address, so I'm assuming this is possible by checking the MAC address and storing it in a database that routers ping upon connection. More info here. According to the extension of this page, I can safely assume it is ASP. How are they obtaining this information?

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• Flex: How to refresh/repaint a chart?

  - by Rob

  I have a chart for which the data is provided asynchronously via a CallResponder (used with a RemoteObject). However, it does not seem possible to update the chart with the data after it has been initially drawn. Here are the relevant snippets of (simplified) code: // code below is in the application MXML <mx:CallResponder id="result" result="resultHandler(event)" /> private function resultHandler(event:ResultEvent):void { // panel is an instance of ChartPanel this.panel.init(event.result); } // invoked when user clicks a button private function displayChart():void { this.currentState = "ShowChart"; result.token = remoteObject.getUrlStatistics(); } // code below is in ChartPanel <mx:BarChart id="chart" /> public function init(value:Object):void { var xml:XMLList = XMLList(value); var data:ArrayCollection = new ArrayCollection(); for each (var element:XML in xml.children()) { // not shown: extract value out of XML, put in ArrayList data.addItem(...); } this.chart.dataProvider = data; } The result is that it draws an empty chart. the resultHandler function or init function in ChartPanel needs to trigger a repaint or something similar. I have tried: Firing a collection modified event after assigning it to chart.dataProvider calling invalidateDisplayList (tried with all components) binding the chart data provider to a variable, and doing the above. changing the view state on the last line of resultHandler. None of them worked. When I fetch the data and cache it locally, then use it to call init synchronously, the chart displays correctly. What am I missing here?

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• Alert Dialog with custom layout failing

  - by cmptrer

  So this is related to a question I asked earlier. I am trying to display an alert using a specified layout. My layout is: And the code to call and show the alert dialog is: Context mContext = getApplicationContext(); AlertDialog.Builder builder = new AlertDialog.Builder(mContext); // use a custom View defined in xml View view = LayoutInflater.from(mContext).inflate(R.layout.sell_dialog, (ViewGroup) findViewById(R.id.layout_root)); builder.setView(view); builder.setPositiveButton(android.R.string.ok, new OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { // do whatever you want with the input } }); AlertDialog alertDialog = builder.create(); alertDialog.show(); When I run it I get an error saying: Uncaught handler: thread main exiting due to uncaught exception android.view.WindowManager$NadTokenException: Unable to add window -- token null is not for an application I've looked through the android development site and can't figure it out. I think I'm just missing something obvious but the fix isn't jumping out at me. How can I get this alert dialog to display?

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• Problem with XElement and XslCompiledTransform

  - by Graham Clark

  I'm having some trouble using a combination of XElement and XslCompiledTransform. I've put the sample code I'm using below. If I get my input XML using the GetXmlDocumentXml() method, it works fine. If I use the GetXElementXml() method instead, I get an InvalidOperationException when calling the Transform method of XslComiledTransform: Token Text in state Start would result in an invalid XML document. Make sure that the ConformanceLevel setting is set to ConformanceLevel.Fragment or ConformanceLevel.Auto if you want to write an XML fragment. The CreateNavigator method on both XElement and XmlDocument returns an XPathNavigator. What extra stuff is XmlDocument doing so this all works, and how can I do the same with XElement? Am I just doing something insane? static void Main(string[] args) { XslCompiledTransform stylesheet = GetStylesheet(); // not shown for brevity IXPathNavigable input = this.GetXElementXml(); using (MemoryStream ms = this.TransformXml(input, stylesheet)) { XmlReader xr = XmlReader.Create(ms); xr.MoveToContent(); } } private MemoryStream TransformXml( IXPathNavigable xml, XslCompiledTransform stylesheet) { MemoryStream transformed = new MemoryStream(); XmlWriter writer = XmlWriter.Create(transformed); stylesheet.Transform(xml, null, writer); transformed.Position = 0; return transformed; } private IXPathNavigable GetXElementXml() { var xml = new XElement("x", new XElement("y", "sds")); return xml.CreateNavigator(); } private IXPathNavigable GetXmlDocumentXml() { var xml = new XmlDocument(); xml.LoadXml("<x><y>sds</y></x>"); return xml.CreateNavigator(); }

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• spring security login pages?

  - by es11

  I have some confusion with how spring security works: In my application, I need to have a login page for users after which they are redirected back the page from where they came. I went through a few spring security tutorials and read some articles, and the examples work by securing a certain page on a site (managed by the <intercept url ..> tag). Then Spring security will generate a login page (or you can specify your own) in order to access the secured page. I am confused because I don't want to necessary secure a given page on my site: I want a login page for users to log into after which they have access to elevated features of the site (through spring security's authorization features). My question is: given what I described, what would be the strategy to create this login page which, after login, would grant the logged in user the appropriate authorities? The hack I thought of would be to create a simple JSP page who's only function is to redirect back to the previous page. Then I would use Spring Security to secure that JSP page. But it seems like there should be a better way of doing this... Thanks

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• Shift-reduce: when to stop reducing?

  - by Joey Adams

  I'm trying to learn about shift-reduce parsing. Suppose we have the following grammar, using recursive rules that enforce order of operations, inspired by the ANSI C Yacc grammar: S: A; P : NUMBER | '(' S ')' ; M : P | M '*' P | M '/' P ; A : M | A '+' M | A '-' M ; And we want to parse 1+2 using shift-reduce parsing. First, the 1 is shifted as a NUMBER. My question is, is it then reduced to P, then M, then A, then finally S? How does it know where to stop? Suppose it does reduce all the way to S, then shifts '+'. We'd now have a stack containing: S '+' If we shift '2', the reductions might be: S '+' NUMBER S '+' P S '+' M S '+' A S '+' S Now, on either side of the last line, S could be P, M, A, or NUMBER, and it would still be valid in the sense that any combination would be a correct representation of the text. How does the parser "know" to make it A '+' M So that it can reduce the whole expression to A, then S? In other words, how does it know to stop reducing before shifting the next token? Is this a key difficulty in LR parser generation?

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• Tokenizing a string with unequal number of spaces between fields

  - by gatechgrad

  I am tryint to tokenize entries from a file. However I am not able to use the line.split("") option because of unequal number of spaces between files. I am copying a few lines from my file below: "08-09-2010 21:21:46 00:22:7f:a6:9b:69 -79" "08-09-2010 21:21:46 04:4f:aa:b4:49:49 -79" "08-09-2010 21:21:46 04:4f:aa:31:4e:59 tikona 18002090044 -83" "08-09-2010 21:21:46 00:22:7f:26:9b:69 tikona 18002090044 -74" "08-09-2010 21:21:46 04:4f:aa:34:0d:c9 tikona 18002090044 -82" "08-09-2010 21:21:46 04:4f:aa:71:4e:59 -85" "08-09-2010 21:21:46 04:4f:aa:34:21:89 tikona 18002090044 -75" "08-09-2010 21:21:46 04:4f:aa:34:49:49 tikona 18002090044 -77" "08-09-2010 21:21:46 04:4f:aa:74:0d:c9 -85" "08-09-2010 21:22:47 18 APs were seen " I need to access the first column (which is a datetime object) the second column (00:22...) and the last column (-79 etc.). I have no trouble accessing the first and second columns, but not the last column. When I do a info=line.spilt(""), since the third column might or might no entries, I am not able to determine the token number. How do i access the 4th column? Is there a way i can use info[i].contains(" -")?

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• Paypal subscriptions IPN - problem with users subscribing multiple times

  - by Brian Armstrong

  I'm using paypal subscriptions and the instant payment notification (IPN) to handle subscribers on my site. For the most part it works well but there is one occasional problem I've encountered. Usually if a user cancels their subscription, I wait for the "end of term" (subscr_eot) notification before disabling access to my site. So if they prepay for the whole month, and then cancel right away, they still have access for the rest of the month (as it should be). But some users are having this problem where they: Cancel their subscription Before the "end of term" is reached they decide to re-subscribe When the "end of term" is reached for their first subscription, my app receives the notification and fires off an email to the user with something like "your account has been disabled, if you ever want to sign up again, you can re-subscribe by clicking here". This confuses them because they are thinking...that's weird, I thought I subscribed like a week ago (and they did). So they go subscribe AGAIN. Now they have two concurrent running subscriptions to my site and I get a support email in a month or two ("wtf you billed me twice this month jerk!!") So I haven't found a good way to fix this. I guess the best solution would be to do an additional API call when the "end of term" notification is received which asks paypal "hey did this person already re-subscribe?". If so then no need to fire off that email. But I haven't seen any way to do this API call yet. Another solution is to disable their account immediately when they cancel (the "subscr_cancel" notification) but then I get different angry support emails "hey I prepaid for the whole month why was my account disabled already!!". Anyone else solved this?

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• Big problem with Dijkstra algorithm in a linked list graph implementation

  - by Nazgulled

  Hi, I have my graph implemented with linked lists, for both vertices and edges and that is becoming an issue for the Dijkstra algorithm. As I said on a previous question, I'm converting this code that uses an adjacency matrix to work with my graph implementation. The problem is that when I find the minimum value I get an array index. This index would have match the vertex index if the graph vertexes were stored in an array instead. And the access to the vertex would be constant. I don't have time to change my graph implementation, but I do have an hash table, indexed by a unique number (but one that does not start at 0, it's like 100090000) which is the problem I'm having. Whenever I need, I use the modulo operator to get a number between 0 and the total number of vertices. This works fine for when I need an array index from the number, but when I need the number from the array index (to access the calculated minimum distance vertex in constant time), not so much. I tried to search for how to inverse the modulo operation, like, 100090000 mod 18000 = 10000 and, 10000 invmod 18000 = 100090000 but couldn't find a way to do it. My next alternative is to build some sort of reference array where, in the example above, arr[10000] = 100090000. That would fix the problem, but would require to loop the whole graph one more time. Do I have any better/easier solution with my current graph implementation?

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• In a WCF Client How Can I add SAML 2.0 assertion to SOAP Header?

  - by Tone

  I'm trying to add the saml 2.0 assertion node from the soap header example below - I came across the samlassertion type in the .net framework but that looks like it is only for saml 1.1. <S:Header> <To xmlns="http://www.w3.org/2005/08/addressing">https://rs1.greenwaymedical.com:8181/CONNECTGateway/EntityService/NhincProxyXDRRequestSecured</To> <Action xmlns="http://www.w3.org/2005/08/addressing">tns:ProvideAndRegisterDocumentSet-bRequest_Request</Action> <ReplyTo xmlns="http://www.w3.org/2005/08/addressing"> <Address>http://www.w3.org/2005/08/addressing/anonymous</Address> </ReplyTo> <MessageID xmlns="http://www.w3.org/2005/08/addressing">uuid:662ee047-3437-4781-a8d2-ee91bc940ef0</MessageID> <wsse:Security S:mustUnderstand="1"> <wsu:Timestamp xmlns:ns17="http://docs.oasis-open.org/ws-sx/ws-secureconversation/200512" xmlns:ns16="http://www.w3.org/2003/05/soap-envelope" wsu:Id="_1"> <wsu:Created>2010-05-26T03:51:57Z</wsu:Created> <wsu:Expires>2010-05-26T03:56:57Z</wsu:Expires> </wsu:Timestamp> <saml2:Assertion xmlns:ds="http://www.w3.org/2000/09/xmldsig#" xmlns:exc14n="http://www.w3.org/2001/10/xml-exc-c14n#" xmlns:saml2="urn:oasis:names:tc:SAML:2.0:assertion" xmlns:xenc="http://www.w3.org/2001/04/xmlenc#" xmlns:xs="http://www.w3.org/2001/XMLSchema" ID="bd1ecf8d-a6d8-488d-9183-a11227c6a219" IssueInstant="2010-05-26T03:51:57.959Z" Version="2.0"> <saml2:Issuer Format="urn:oasis:names:tc:SAML:1.1:nameid-format:X509SubjectName">CN=SAML User,OU=SU,O=SAML User,L=Los Angeles,ST=CA,C=US</saml2:Issuer> <saml2:Subject> <saml2:NameID Format="urn:oasis:names:tc:SAML:1.1:nameid-format:X509SubjectName">UID=kskagerb</saml2:NameID> <saml2:SubjectConfirmation Method="urn:oasis:names:tc:SAML:2.0:cm:holder-of-key"> <saml2:SubjectConfirmationData> <ds:KeyInfo> <ds:KeyValue> <ds:RSAKeyValue> <ds:Modulus>p4jUkEUg..gwO7U=</ds:Modulus> <ds:Exponent>AQAB</ds:Exponent> </ds:RSAKeyValue> </ds:KeyValue> </ds:KeyInfo> </saml2:SubjectConfirmationData> </saml2:SubjectConfirmation> </saml2:Subject> <saml2:AuthnStatement AuthnInstant="2009-04-16T13:15:39.000Z" SessionIndex="987"> <saml2:SubjectLocality Address="158.147.185.168" DNSName="cs.myharris.net"/> <saml2:AuthnContext> <saml2:AuthnContextClassRef>urn:oasis:names:tc:SAML:2.0:ac:classes:X509</saml2:AuthnContextClassRef> </saml2:AuthnContext> </saml2:AuthnStatement> <saml2:AttributeStatement> <saml2:Attribute Name="urn:oasis:names:tc:xspa:1.0:subject:subject-id"> <saml2:AttributeValue xmlns:ns6="http://www.w3.org/2001/XMLSchema-instance" xmlns:ns7="http://www.w3.org/2001/XMLSchema" ns6:type="ns7:string">Karl S Skagerberg</saml2:AttributeValue> </saml2:Attribute> <saml2:Attribute Name="urn:oasis:names:tc:xspa:1.0:subject:organization"> <saml2:AttributeValue xmlns:ns6="http://www.w3.org/2001/XMLSchema-instance" xmlns:ns7="http://www.w3.org/2001/XMLSchema" ns6:type="ns7:string">InternalTest2</saml2:AttributeValue> </saml2:Attribute> <saml2:Attribute Name="urn:oasis:names:tc:xspa:1.0:subject:organization-id"> <saml2:AttributeValue xmlns:ns6="http://www.w3.org/2001/XMLSchema-instance" xmlns:ns7="http://www.w3.org/2001/XMLSchema" ns6:type="ns7:string">2.2</saml2:AttributeValue> </saml2:Attribute> <saml2:Attribute Name="urn:nhin:names:saml:homeCommunityId"> <saml2:AttributeValue xmlns:ns6="http://www.w3.org/2001/XMLSchema-instance" xmlns:ns7="http://www.w3.org/2001/XMLSchema" ns6:type="ns7:string">2.16.840.1.113883.3.441</saml2:AttributeValue> </saml2:Attribute> <saml2:Attribute Name="urn:oasis:names:tc:xacml:2.0:subject:role"> <saml2:AttributeValue> <hl7:Role xmlns:hl7="urn:hl7-org:v3" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" code="307969004" codeSystem="2.16.840.1.113883.6.96" codeSystemName="SNOMED_CT" displayName="Public Health" xsi:type="hl7:CE"/> </saml2:AttributeValue> </saml2:Attribute> <saml2:Attribute Name="urn:oasis:names:tc:xspa:1.0:subject:purposeofuse"> <saml2:AttributeValue> <hl7:PurposeForUse xmlns:hl7="urn:hl7-org:v3" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" code="PUBLICHEALTH" codeSystem="2.16.840.1.113883.3.18.7.1" codeSystemName="nhin-purpose" displayName="Use or disclosure of Psychotherapy Notes" xsi:type="hl7:CE"/> </saml2:AttributeValue> </saml2:Attribute> <saml2:Attribute Name="urn:oasis:names:tc:xacml:2.0:resource:resource-id"> <saml2:AttributeValue xmlns:ns6="http://www.w3.org/2001/XMLSchema-instance" xmlns:ns7="http://www.w3.org/2001/XMLSchema" ns6:type="ns7:string">500000000^^^&amp;1.1&amp;ISO</saml2:AttributeValue> </saml2:Attribute> </saml2:AttributeStatement> <saml2:AuthzDecisionStatement Decision="Permit" Resource="https://158.147.185.168:8181/SamlReceiveService/SamlProcessWS"> <saml2:Action Namespace="urn:oasis:names:tc:SAML:1.0:action:rwedc">Execute</saml2:Action> <saml2:Evidence> <saml2:Assertion ID="40df7c0a-ff3e-4b26-baeb-f2910f6d05a9" IssueInstant="2009-04-16T13:10:39.093Z" Version="2.0"> <saml2:Issuer Format="urn:oasis:names:tc:SAML:1.1:nameid-format:X509SubjectName">CN=SAML User,OU=Harris,O=HITS,L=Melbourne,ST=FL,C=US</saml2:Issuer> <saml2:Conditions NotBefore="2009-04-16T13:10:39.093Z" NotOnOrAfter="2009-12-31T12:00:00.000Z"/> <saml2:AttributeStatement> <saml2:Attribute Name="AccessConsentPolicy" NameFormat="http://www.hhs.gov/healthit/nhin"> <saml2:AttributeValue xmlns:ns6="http://www.w3.org/2001/XMLSchema-instance" xmlns:ns7="http://www.w3.org/2001/XMLSchema" ns6:type="ns7:string">Claim-Ref-1234</saml2:AttributeValue> </saml2:Attribute> <saml2:Attribute Name="InstanceAccessConsentPolicy" NameFormat="http://www.hhs.gov/healthit/nhin"> <saml2:AttributeValue xmlns:ns6="http://www.w3.org/2001/XMLSchema-instance" xmlns:ns7="http://www.w3.org/2001/XMLSchema" ns6:type="ns7:string">Claim-Instance-1</saml2:AttributeValue> </saml2:Attribute> </saml2:AttributeStatement> </saml2:Assertion> </saml2:Evidence> </saml2:AuthzDecisionStatement> <ds:Signature xmlns:ds="http://www.w3.org/2000/09/xmldsig#"> <ds:SignedInfo> <ds:CanonicalizationMethod Algorithm="http://www.w3.org/2001/10/xml-exc-c14n#"/> <ds:SignatureMethod Algorithm="http://www.w3.org/2000/09/xmldsig#rsa-sha1"/> <ds:Reference URI="#bd1ecf8d-a6d8-488d-9183-a11227c6a219"> <ds:Transforms> <ds:Transform Algorithm="http://www.w3.org/2000/09/xmldsig#enveloped-signature"/> <ds:Transform Algorithm="http://www.w3.org/2001/10/xml-exc-c14n#"/> </ds:Transforms> <ds:DigestMethod Algorithm="http://www.w3.org/2000/09/xmldsig#sha1"/> <ds:DigestValue>ONbZqPUyFVPMx4v9vvpJGNB4cao=</ds:DigestValue> </ds:Reference> </ds:SignedInfo> <ds:SignatureValue>Dm/aW5bB..pF93s=</ds:SignatureValue> <ds:KeyInfo> <ds:KeyValue> <ds:RSAKeyValue> <ds:Modulus>p4jUkEU..bzqgwO7U=</ds:Modulus> <ds:Exponent>AQAB</ds:Exponent> </ds:RSAKeyValue> </ds:KeyValue> </ds:KeyInfo> </ds:Signature> </saml2:Assertion> <ds:Signature xmlns:ns17="http://docs.oasis-open.org/ws-sx/ws-secureconversation/200512" xmlns:ns16="http://www.w3.org/2003/05/soap-envelope" Id="_2"> <ds:SignedInfo> <ds:CanonicalizationMethod Algorithm="http://www.w3.org/2001/10/xml-exc-c14n#"> <exc14n:InclusiveNamespaces PrefixList="wsse S"/> </ds:CanonicalizationMethod> <ds:SignatureMethod Algorithm="http://www.w3.org/2000/09/xmldsig#rsa-sha1"/> <ds:Reference URI="#_1"> <ds:Transforms> <ds:Transform Algorithm="http://www.w3.org/2001/10/xml-exc-c14n#"> <exc14n:InclusiveNamespaces PrefixList="wsu wsse S"/> </ds:Transform> </ds:Transforms> <ds:DigestMethod Algorithm="http://www.w3.org/2000/09/xmldsig#sha1"/> <ds:DigestValue> <Include xmlns="http://www.w3.org/2004/08/xop/include" href="cid:[email protected]"/> </ds:DigestValue> </ds:Reference> </ds:SignedInfo> <ds:SignatureValue> <Include xmlns="http://www.w3.org/2004/08/xop/include" href="cid:[email protected]"/> </ds:SignatureValue> <ds:KeyInfo> <wsse:SecurityTokenReference wsse11:TokenType="http://docs.oasis-open.org/wss/oasis-wss-saml-token-profile-1.1#SAMLV2.0"> <wsse:KeyIdentifier ValueType="http://docs.oasis-open.org/wss/oasis-wss-saml-token-profile-1.1#SAMLID">bd1ecf8d-a6d8-488d-9183-a11227c6a219</wsse:KeyIdentifier> </wsse:SecurityTokenReference> </ds:KeyInfo> </ds:Signature> </wsse:Security> </S:Header> I've been researching for days and cannot seem to come up with a straightforward way of doing this in WCF. The web service is running on Glassfish and is soap 1.1, I've tried using all the packaged wcf bindings but have not been able to get them to work. I started down the path of using a MessageInspector, and wrote one but then realized there must be a better way, surely WCF provides some way to insert saml 2.0 assertions. I've made the most progress writing a custom binding - i've been able to get the timestamp and signature nodes in the soap header, but cannot for the life of me figure out the saml assertion. Any ideas? public static System.ServiceModel.Channels.Binding BuildCONNECTCustomBinding() { TransportSecurityBindingElement transportSecurityBindingElement = SecurityBindingElement.CreateCertificateOverTransportBindingElement(MessageSecurityVersion.WSSecurity10WSTrustFebruary2005WSSecureConversationFebruary2005WSSecurityPolicy11BasicSecurityProfile10); TextMessageEncodingBindingElement textMessageEncodingBindingElement = new TextMessageEncodingBindingElement(MessageVersion.Soap11WSAddressing10, System.Text.Encoding.UTF8); HttpsTransportBindingElement httpsTransportBindingElement = new HttpsTransportBindingElement(); SecurityTokenReferenceType securityTokenReference = new SecurityTokenReferenceType(); BindingElementCollection bindingElementCollection = new BindingElementCollection(); bindingElementCollection.Add(transportSecurityBindingElement); bindingElementCollection.Add(textMessageEncodingBindingElement); bindingElementCollection.Add(httpsTransportBindingElement); CustomBinding cb = new CustomBinding(bindingElementCollection); cb.CreateBindingElements(); return cb; }

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• To GAC, or not to GAC?

  - by Jagd

  I have a data access layer (DAL) that is written in ASP.NET 3.5 and uses the Microsoft patterns & practices libraries (hereafter referred to as P&P) in order to accomplish its data access. I installed P&P and it resides in my GAC, so, logically, my DAL references it in the GAC. Therefore, the P&P libraries are never pulled down to the bin folder of my DAL. I use this DAL project in at least five (more than that even, but I'm too lazy to try to count them all) different websites. And this has all worked just fine for me because I'm the only developer who works on these websites. But, now I have other developers who are going to work on some of these websites. The problem: if a developer pulls the DAL project down from our code repository, it won't build for them if they don't have the P&P libraries installed. My question: should I expect the developers to install the P&P libraries, or should I just dump them in the bin folder and be done with it? I realize that dumping them into the bin folder is probably the easiest way to deal with the problem, but I've never been a big fan of the bin folder if I can reference them in the GAC instead.

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• using wget against protected site with NTLM

  - by Joey V.

  Trying to mirror a local intranet site and have found previous questions using 'wget'. It works great with sites that are anonymous, but I have not been able to use it against a site that is expecting username\password (IIS with Integrated Windows Authentication). Here is what I pass in: wget -c --http-user='domain\user' --http-password=pwd http://local/site -dv Here is the debug output (note I replaced some with dummy values obviously): Setting --verbose (verbose) to 1 DEBUG output created by Wget 1.11.4 on Windows-MSVC. --2009-07-14 09:39:04-- http://local/site Host `local' has not issued a general basic challenge. Resolving local... seconds 0.00, x.x.x.x Caching local = x.x.x.x Connecting to local|x.x.x.x|:80... seconds 0.00, connected. Created socket 1896. Releasing 0x003e32b0 (new refcount 1). ---request begin--- GET /site/ HTTP/1.0 User-Agent: Wget/1.11.4 Accept: */* Host: local Connection: Keep-Alive ---request end--- HTTP request sent, awaiting response... ---response begin--- HTTP/1.1 401 Access Denied Server: Microsoft-IIS/5.1 Date: Tue, 14 Jul 2009 13:39:04 GMT WWW-Authenticate: Negotiate WWW-Authenticate: NTLM Content-Length: 4431 Content-Type: text/html ---response end--- 401 Access Denied Closed fd 1896 Unknown authentication scheme. Authorization failed.

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• Cookies not present after using XMLHttpRequest

  - by Joe B

  I'm trying to make a bookmarklet to download videos off of YouTube, but I've come across a little problem. To detect the highest quality video available, I use a sort of brute force method, in which I make requests using the XMLHttpRequest object until a 404 isn't returned (I can't do it until a 200 ok is returned because YouTube redirects to a different server if the video is available, and the cross-domain policy won't allow me to access any of that data). Once a working URL is found, I simply set window.location to the URL and the download should start, right? Wrong. A request is made, but for reasons unknown to me, the cookies are stripped and YouTube returns a 403 access denied. This does not happen if the XML requests aren't made before it, i.e. if I just set the window.location to the URL everything works fine, it's when I do the XMLHttpRequest that the cookies aren't sent. It's hard to explain so here's the script: var formats = ["37", "22", "35", "34", "18", ""]; var url = "/get_video?video_id=" + yt.getConfig('SWF_ARGS')['video_id'] + "&t=" + (unescape(yt.getConfig('SWF_ARGS')['t'])) + "&fmt="; for (var i = 0; i < formats.length; i++) { xmlhttp = new XMLHttpRequest; xmlhttp.open("HEAD", url + formats[i], false); xmlhttp.send(null); if (xmlhttp.status != 404) { document.location = url + formats[i]; break } } That script does not send the cookies after setting the document.location and thus does not work. However, simply doing this: document.location = /get_video?video_id=" + yt.getConfig('SWF_ARGS')['video_id'] + "&t=" + (unescape(yt.getConfig('SWF_ARGS')['t'])) DOES send the cookies along with the request, and does work. The only downside is I can't automatically detect the highest quality, I just have to try every "fmt" parameter manually until I get it right. So my question is: why is the XMLHttpRequest object removing cookies from subsequent requests? This is the first time I've ever done anything in JS by the way, so please, go easy on me. ;)

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• Problem with header files of ARToolkitPlus after making the ARToolKitPlus dylib!

  - by MNassar

  I'm writing this Augmented Reality app for the iPhone and I'd decided to use ARToolKitPlus for it. Using QMake, I created the xcode project file and subsequently the libArToolKitPlus.dylib I tried to compile and run the sample files "simple" and "multi" which worked well. Now all other attempts that I tried to create another project and use the library have failed due to header files not being found. If I drag the "include" folder to the xcode project I get 8 errors instead of just one; The one is for the main include not being found is solved but then it includes 8 other headers that cannot be found (although they are in the same folder) #include "ARToolKitPlus/TrackerSingleMarkerImpl.h" I get a error: ARToolKitPlus/TrackerSingleMarkerImpl.h: No such file or directory If I drag the include folder then some of what I get: error: ARToolKitPlus/TrackerSingleMarker.h: No such file or directory error: ../src/TrackerSingleMarkerImpl.cpp: No such file or directory error: expected class-name before ',' token class TrackerSingleMarkerImpl : public TrackerSingleMarker, protected TrackerImpl<__PATTERN_SIZE_X,__PATTERN_SIZE_Y, __PATTERN_SAMPLE_NUM, __MAX_LOAD_PATTERNS, __MAX_IMAGE_PATTERNS Having the dylib doesnt make a difference as far as I can tell. What do you think I should do?? Would creating a framework help??

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• BreezingForms Integrator Finalize Code and $this->execPieceByName('ff_InitLib');

  - by nickyt

  I've started working on a Joomla! project (I'm mainly a C#/ASP.NET kind a guy). I'm using BreezingForms and have created forms, got them working, but now I need to do some additional code in the "Finalize Code" section. I need to access form elements via BreezingForms(FacileForms) API. Here's what I'm doing, but it chokes: $this->execPieceByName('ff_SubmitLib'); // Is this necessary? // load the standard Facile Forms library $this->execPieceByName('ff_InitLib'); // page breaks here. // get the name of the uploaded file $filename = ff_getSubmit('someUploadedFile'); Now I don't know what goes wrong. The page posts back blank. I'm not sure how to debug this in Joomla. I currently do not have access to the server to debug, so I would need to debug remotely at runtime (not ideal I know). My account is of type Administrator for the Joomla backend. As far as I know all the plugins/modules are installed. Any ideas?

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• java RMI newbie-- some basic questions about SSL and auth/.rate limiting an RMI service

  - by Arvind

  I am trying to work to secure a java based RMI service using SSL. I have some basic questions about the capabilities of using SSL. Specifically, from what I understand, the client and server connecting via SSL will need to have appropriate credential certificates in both client and server, for a client to be granted access to the server. Am I correct in my understanding? Also, what I want to know is, can a person who is already using my RMI service and has access to a client machine , make a copy of the certificate in the client machine to other client machines-- and then invoke my RMI service from those other machines as well? How do I prevent such a situation from occurring? I mean, in a REST API you can use OAuth authentication, can we have some kind of authentication in an RMI Service? Also, can I possibly limit usage of the RMI service? For eg, a specific client may be allowed to make only 5000 calls per day to my RMI service, and if he makes more calls the calls occurring after the 5000 calls limit are all denied? How do I do such rate limiting and/or authentication for my RMI Service?

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• Password Cracking Windows Accounts

  - by Kevin

  At work we have laptops with encrypted harddrives. Most developers here (on occasion I have been guilty of it too) leave their laptops in hibernate mode when they take them home at night. Obviously, Windows (i.e. there is a program running in the background which does it for windows) must have a method to unencrypt the data on the drive, or it wouldn't be able to access it. That being said, I always thought that leaving a windows machine on in hibernate mode in a non-secure place (not at work on a lock) is a security threat, because someone could take the machine, leave it running, hack the windows accounts and use it to encrypt the data and steal the information. When I got to thinking about how I would go about breaking into the windows system without restarting it, I couldn't figure out if it was possible. I know it is possible to write a program to crack windows passwords once you have access to the appropriate file(s). But is it possible to execute a program from a locked Windows system that would do this? I don't know of a way to do it, but I am not a Windows expert. If so, is there a way to prevent it? I don't want to expose security vulnerabilities about how to do it, so I would ask that someone wouldn't post the necessary steps in details, but if someone could say something like "Yes, it's possible the USB drive allows arbitrary execution," that would be great! EDIT: The idea being with the encryption is that you can't reboot the system, because once you do, the disk encryption on the system requires a login before being able to start windows. With the machine being in hibernate, the system owner has already bypassed the encryption for the attacker, leaving windows as the only line of defense to protect the data.

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• Efficient Context-Free Grammar parser, preferably Python-friendly

  - by Max Shawabkeh

  I am in need of parsing a small subset of English for one of my project, described as a context-free grammar with (1-level) feature structures (example) and I need to do it efficiently . Right now I'm using NLTK's parser which produces the right output but is very slow. For my grammar of ~450 fairly ambiguous non-lexicon rules and half a million lexical entries, parsing simple sentences can take anywhere from 2 to 30 seconds, depending it seems on the number of resulting trees. Lexical entries have little to no effect on performance. Another problem is that loading the (25MB) grammar+lexicon at the beginning can take up to a minute. From what I can find in literature, the running time of the algorithm used to parse such a grammar (Earley or CKY) should be linear to the size of the grammar and cubic to the size of the input token list. My experience with NLTK indicates that ambiguity is what hurts the performance most, not the absolute size of the grammar. So now I'm looking for a CFG parser to replace NLTK. I've been considering PLY but I can't tell whether it supports feature structures in CFGs, which are required in my case, and the examples I've seen seem to be doing a lot of procedural parsing rather than just specifying a grammar. Can anybody show me an example of PLY both supporting feature structs and using a declarative grammar? I'm also fine with any other parser that can do what I need efficiently. A Python interface is preferable but not absolutely necessary.

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• Unmanaged DLL in C# Web Service

  - by Telis

  Hi Guys, please help µe as I am new into accessing an unmanaged DLL from C#.. I have a large unmanaged DLL in C++ and I am trying to access the DLL's classes and functions from a C# Web Service. I have seen many examples how to use DLLImport, but for some reason I am stuck with my very first wrapper method spending many hours with no luck.. What should I do to return an object in my 'Marshaled' [DllImport..] function? I would like to do something like that: [DllImport("unmanaged.dll")] public static extern MyClass MyFunction(); Here is the definition of my C++ class and the function that I want to access: class __declspec(dllexport) TPDate { public: TPDate(); TPDate(const TPDate& rhs); ... //today's date. static TPDate AsOfDate(void); ... } In my Web service I have declared the following StructLayout: [StructLayout(LayoutKind.Sequential)] public class TPDate { public TPDate(TPDate d) { _tpDate = d; } public TPDate _tpDate; } and here's where I think that I'm not doing something right: class WrapperTPDate { [DllImport("TPTools.dll", ExactSpelling=false, EntryPoint = "?AsOfDate@TPDate@@SA?AV1@XZ", CallingConvention = CallingConvention.StdCall)] [return: MarshalAs(UnmanagedType.Struct)] **public static extern TPDate AsOfDate();**// HERE THERE IS PROBLEM }; I am calling the wrapper as follows from my WebMethod: [WebMethod] public void ConstructModel() { TPDate date1 = WrapperTPDate.AsOfDate();// Here I get exception TPDate date = new TPDate(date1); } The exception i am getting is: System.Web.Services.Protocols.SoapException: Server was unable to process request. ---> System.Runtime.InteropServices.MarshalDirectiveException: Cannot marshal 'return value': Invalid managed/unmanaged type combination (this type must be paired with LPStruct or Interface). If I change it to LPSTRUCT, I am getting another exception: System.Web.Services.Protocols.SoapException: Server was unable to process request. ---> System.AccessViolationException: Attempted to read or write protected memory. This is often an indication that other memory is corrupt Could you please tell me where I'm doing wrong here Thanks

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• Lucene stop words not removed during searching need a substitute for AnalyzingQueryParser

  - by iamrohitbanga

  I have created a Lucene index with the following analyzer. public class DocSpecAnalyzer extends Analyzer { private static CharArraySet stopSet;// = new HashSet<String>(Arrays.asList());//STOP_WORDS_SET; static { stopSet = new CharArraySet(FDConstants.stopwords, true); // uncommenting this displays all the stop words // for (String s: FDConstants.stopwords) { // System.out.println(s); // } } /** * Specifies whether deprecated acronyms should be replaced with HOST type. * See {@linkplain https://issues.apache.org/jira/browse/LUCENE-1068} */ private final boolean enableStopPositionIncrements; private final Version matchVersion; public DocSpecAnalyzer(Version matchVersion) { this.matchVersion = matchVersion; enableStopPositionIncrements = StopFilter.getEnablePositionIncrementsVersionDefault(matchVersion); } public TokenStream tokenStream(String fieldName, Reader reader) { StandardTokenizer tokenStream = new StandardTokenizer(matchVersion, reader); tokenStream.setMaxTokenLength(DEFAULT_MAX_TOKEN_LENGTH); TokenStream result = new StandardFilter(tokenStream); result = new LowerCaseFilter(result); result = new StopFilter(enableStopPositionIncrements, result, stopSet); result = new PorterStemFilter(result); return result; } /** Default maximum allowed token length */ public static final int DEFAULT_MAX_TOKEN_LENGTH = 255; } Now when I search for documents for a query containing stop words, i get hits for stop words also. It is because of http://lucene.apache.org/java/2_9_2/api/contrib-misc/org/apache/lucene/queryParser/analyzing/AnalyzingQueryParser.html not handling stop words. Is there a substitute? Update: forgot to mention that I need to do a fuzzy search. that is why i am using an AnalyzingQueryParser. Update portion of code that invokes AnalyzingQueryParser AnalyzingQueryParser parser = new AnalyzingQueryParser(Version.LUCENE_CURRENT,"description", analyzer); // fuzzy matching preparation String fuzzyStr = TextQuery.prepareFuzzy(tq.text, fuzzyDist); Query query = parser.parse(fuzzyStr); TopScoreDocCollector collector = TopScoreDocCollector.create(numHits, true); searcher.search(query, collector);

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• Struts2 ParametersInterceptor problem with oauth_token

  - by Tahir Akram

  I am developing an application in Struts2 with Twitter4J at GAE/J. I am getting following exception in the GAE log. Unable to understand whats wrong with it. com.opensymphony.xwork2.interceptor.ParametersInterceptor setParameters: ParametersInterceptor - [setParameters]: Unexpected Exception caught setting 'oauth_token' on 'class com.action.Home: Error setting expression 'oauth_token' with value '[Ljava.lang.String;@146ac5a' Following is my struts.xml <!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN" "http://struts.apache.org/dtds/struts-2.0.dtd" <constant name="struts.enable.DynamicMethodInvocation" value="false" /> <constant name="struts.devMode" value="false" /> <package name="hello" extends="struts-default" > <action name="Home" class="com.action.Home"> <result name="SUCCESS">/home.jsp</result> <result name="ERROR">/message.jsp</result> </action> </package> Home.java code Twitter twitter = new Twitter(); HttpSession session = request.getSession(); twitter.setOAuthConsumer(FFConstants.CONSUMER_KEY, FFConstants.CONSUMER_SECRET); AccessToken accessToken = twitter.getOAuthAccessToken((String)session.getAttribute("token"), (String)session.getAttribute("tokenSecret")); twitter.setOAuthAccessToken(accessToken); User user = twitter.verifyCredentials(); It will be great if some one give me pointer on it. Thanks.

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• Python equivalent of IDL's stop and .reset

  - by Jamie

  Hi there, I'm relatively new to python but have a bit of experience using IDL. I was wondering if anyone knows if there are equivalent commands in python for IDL's stop and .reset commands. If I'm running some IDL script I wrote that I put a stop command in, essentially what it does is stop the script there and give me access to the command line in the middle of the script. So I have access to all the functions and variables that I defined before the stop command, which I find really useful for debugging. The .reset command I find extremely useful too. What it does is reset the the IDL environment (clears all variables, functions, etc.). It's as if I closed that session and opened a new one, but without having to exit and restart IDL. I find that if I'm trying to debug a script I wrote it's useful sometimes to start from scratch and not have to reset IDL (or python now). It would be useful also in python to be able to un-import any modules I had previously imported. Any help with these issues would be greatly appreciated. Cheers Related Python Drop into REPL Is it possible to go into ipython from code?

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