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  • python thread prob after build

    - by Apache
    hi expert, i'm having task to scan wifi at specific interval and send it to the server, i've it in python and its works fine when i run manually, then build it to package and when run there is no progress at all, i already ask this question before at http://stackoverflow.com/questions/2735410/python-scritp-problem-once-build-and-package-it, then, i re-modify my code as below, then i found that thread is not functioning once i build, #!/usr/bin/env python import subprocess,threading,... configFile = open('/opt/Jemapoh_Wifi/config.txt', 'r') url = configFile.readline().strip() intervalTime = configFile.readline().strip() status = configFile.readline().strip() print "url "+url print "intervalTime "+intervalTime print "Status "+status.strip() def getMacAddress(): proc = subprocess.Popen('ifconfig -a wlan0 | grep HWaddr | sed \'/^.*HWaddr */!d; s///;q\'', shell=True, stdout=subprocess.PIPE, ) macAddress = proc.communicate()[0].strip() return macAddress def getTimestamp(): from time import strftime timeStamp = strftime("%Y-%m-%d %H:%M:%S") return timeStamp def scanWifi(): try: print "Scanning..." proc = subprocess.Popen('iwlist scan 2>/dev/null', shell=True, stdout=subprocess.PIPE, ) stdout_str = proc.communicate()[0] stdout_list=stdout_str.split('\n') essid=[] rssi=[] preQuality=[] for line in stdout_list: line=line.strip() match=re.search('ESSID:"(\S+)"',line) if match: essid.append(match.group(1)) match=re.search('Quality=(\S+)',line) if match: preQuality.append(match.group(1)) for qualityConversion in preQuality: qualityConversion = qualityConversion.split()[0].split('/') temp = str(int(round(float(qualityConversion[0]) / float(qualityConversion[1]) * 100))).rjust(2) rssi.append(temp) dataToPost = '{"userId":"' + getMacAddress() + '","timestamp":"' + getTimestamp() + '","wifi":[' for no in range(len(essid)): dataToPost += '{"ssid":"' + essid[no] + '","rssi":"' + rssi[no] + '"}' if no+1 == len(essid): pass else: dataToPost += ',' dataToPost += ']}' query_args = {"data":dataToPost} request = urllib2.Request(url) request.add_data(urllib.urlencode(query_args)) request.add_header('Content-Type', 'application/x-www-form-urlencoded') print "Waiting for server response..." print urllib2.urlopen(request).read() print "Data Sent @ " + getTimestamp() print "------------------------------------------------------" t = threading.Timer(int(intervalTime), scanWifi).start() except Exception, e: print e t = threading.Timer(int(intervalTime), scanWifi) t.start() once build, its not reaching the thread, do can anyone help, why the thread is not working after build thanks

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  • Issue in creating Zip file using glob.glob

    - by infosyssec
    Hi, I am creating a Zip file from a folder (and subfolders). it works fine and creates a new .zip file also but I am having an issue while using glob.glob. It is reading all files from the desired folder (source folder) and writing to the new zip file but the problem is that it is, however, adding subdirectories, but not adding files form the subdirectories. I am giving user an option to select the filename and path as well as filetype also (Zip or Tar). I don;t get any problem while creating .tar.gz file, but when use creates .zip file, this problem comes across. Here is my code: for name in (Source_Dir): for name in glob.glob("/path/to/source/dir/*" ): myZip.write(name, os.path.basename(name), zipfile.ZIP_DEFLATED) myZip.close() Also, if I use code below: for dirpath, dirnames, filenames in os.walk(Source_Dir): myZip.write(os.path.join(dirpath, filename) os.path.basename(filename)) myZip.close() Now the 2nd code taks all files even if it inside the folder/ subfolders, creates a new .zip file and write to it without any directory strucure. It even does not take dir structure for main folder and simply write all files from main dir or subdir to that .zip file. Can anyone please help me or suggest me. I would prefer glob.glob rather than the 2nd option to use. Thanks in advance. Regards, Akash

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  • Android - Lifecycle and saving an Instance State questions

    - by The Salt
    So within my application is a form for creating a new user, with relevant details and information about the user. There's no problems there, it's just what happens when the user leaves the activity without pressing the confirm button. Here's what I want to do: If the user presses the back button, attempt to save all the data to the database and inform the user. If the activity is interrupted (ie by a phone call), save all the data into a temporary location so when the activity is at the top of the stack again, nothing appears to have changed (but the data still hasn't yet been saved to the database). If the activity gets killed for more resources when in the background, do the same as point 2 above (ie when the activity is started again, it appears that nothing has changed). If the whole application is started again (by clicking on the icon again) and there is temporary data stored from either points 2 or 3 above, navigate to the "create user" activity and display data as if nothings changed. Here's how I'm currently trying to do it: Use onDestroy() and isFinishing() functions to find when the activity is being killed, to cover point 1 above (to then try and save all data). Save all data with onSaveInstanceState into a bundle (to cover point 2 above) Does the bundle created with onSaveInstanceState survive the activity being killed for more resources, so when its recreated the previous state can be retrieved (as in point 3 above)? No idea how to implement point 4. Any help would be massively appreciated. Cheers!

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  • Improve Application Performace

    - by Gtest
    Hello, Want To Improvide Performace Of C#.Net Applicaiton.. In My Application I am using Third Party Interop/Dll To Process .doc Files. It's a Simple Operation, Which Pass Input/Output FilePath to Interop dll ...& dll will execute text form input file. To Improve Performace I have Tried, Execute 2 therad to process 32 files.(each Thread process 16 files) Execute application code by creating 2 new AppDomains(each AppDomain Code process 16 files) Execute Code Using TPL(Task Parellel Library) But all options take around same time (32 sec) to process 32 files.Manually process tooks same 32 sec to process 32 files. Just tried one thing ..when i have created sample exe to process 16 files as input & output for refrence PAth given in TextBox. ..I open 2 exe instance to process. 1 exe has differnt 16 input files & output Created with input file path 2 exe has differnt 16 input files & output Created with input file path When i click on start button of both exe ..it use 100% cpu & Utilize both core significantly & Process Completed within 16 sec for 32 files. Can we provide this kind of explicit prallism to Improve my applicaiton Peformace? Thanks.

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  • Playing wave file ends immediatly (C++, Windows)

    - by TyBoer
    I've got a following situation. On a machine there is a Fritz ISDN card. There is a process that is responsible for playing a certain wave file on this device's wave out (ISDN connection is made at startup and made persistent). The scenario is easy, whenever needed the process calls waveOutWrite() on the previously opened wave device (everything initialized without any problems of course) and a callback function waits for MMWOMDONE msg to know that the playback has been finished. Since a few days however (nothing changed neither in the process nor the machine) the MMWOMDONE message comes immediately after calling waveOutWrite() even though the wave lasts a couple of seconds. Again no error is reported, it looks like the file was played but had zero length (which is not the case). I am also sure that waveOutReset() was not called by my process (it would also trigger sending the mentioned message). I already used to have some strange problems in the past that where solved simply by reinstalling TAPI drivers. This time for some reason it is problematic form me to perform that once again and am trying more analytical approach :). Any suggestions what might cause such a behavior? Maybe sth on the other end of the ISDN line?

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  • How to get error text in controller from BindingResult

    - by Mike
    I have an controller that returns JSON. It takes a form, which validates itself via spring annotations. I can get FieldError list from BindingResult, but they don't contain the text that a JSP would display in the tag. How can I get the error text to send back in JSON? @RequestMapping(method = RequestMethod.POST) public @ResponseBody JSONResponse submit(@Valid AnswerForm answerForm, BindingResult result, Model model, HttpServletRequest request, HttpServletResponse response) { if (result.hasErrors()) { response.setStatus(HttpServletResponse.SC_BAD_REQUEST); JSONResponse r = new JSONResponse(); r.setStatus(JSONResponseStatus.ERROR); //HOW DO I GET ERROR MESSAGES OUT OF BindingResult??? } else { JSONResponse r = new JSONResponse(); r.setStatus(JSONResponseStatus.OK); return r; } } JSONREsponse class is just a POJO public class JSONResponse implements Serializable { private JSONResponseStatus status; private String error; private Map<String,String> errors; private Map<String,Object> data; ...getters and setters... } Calling BindingResult.getAllErrors() returns an array of FieldError objects, but it doesn't have the actual errors.

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  • Why won't my styles show in a Dynamics CRM 4 IFRAME?

    - by Dan Crowther
    I have created a web page (ASP.NET) that includes a stylesheet to mimic Dynamics CRM styles. This is to be used in a CRM IFRAME (within a form). The stylesheet is referenced as follows: <head id="Head1" runat="server"> <link href="Styles.css" rel="stylesheet" type="text/css" /> </head> When I load the page in Visual Studio, all is well. When I load it in CRM, none of the styles are shown and no images are displayed. If I browse directly to the image, I get a 404 error. However, the pages function correctly. I have set read permissions for "Everyone" on the server to see if that was causing a problem but it didn't help. I also tried putting a plain HTML page in the folder and that won't load either - again a 404. The page is installed in the ISV folder ..../isv/MyProject. Can anyone help? EDIT This is on a multi-tenancy system. On my test company (testcompany) if I browse to http://crm/testcompany/isv/MyProject/MyPage.aspx, the page is loaded (without styles and images). If I browse to http://crm/testcompany/isv/MyProject/TestImage.gif, the image is not shown. If I browse to http://crm/isv/MyProject/TestImage.gif, the image is shown. Does this suggest a problem with the server setup and the way CRM messes around with virtual directories?

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  • Rails CSS not Loading using Heroku

    - by eWizardII
    I have the following site set up here on Heroku - http://www.peerinstruction.net/users/sign_up the issue is that I have updated the css yet it is not being actively reflected on the site, it just shows a textbox, with some edited/custom fonts. I have attached the css file in the following gist - https://gist.github.com/f74b626c54ecbb60bbde The signup page controller: !!! Strict %html %head %title= yield(:title) || "Untitled" = stylesheet_link_tag 'application', 'web-app-theme/base', 'web-app-theme/themes/activo/style', 'web-app-theme/override' = javascript_include_tag :defaults = csrf_meta_tag = yield(:head) %body #container #header %h1 %a{:href => "/"} Peer Instruction Network #user-navigation %ul.wat-cf %li .content.login .flash - flash.each do |type, message| %div{ :class => "message #{type}" } %p= message = form_for(resource, :as => resource_name, :url => session_path(resource_name), :html => { :class => "form login" }) do |f| .group.wat-cf .left= f.label :email, :class => "label right" .right= f.text_field :email, :class => "text_field" .group.wat-cf .left= f.label :password, :class => "label right" .right= f.password_field :password, :class => "text_field" .group.wat-cf .right %button.button{ :type => "submit" } Login /= link_to "Sign In", destroy_user_session_path #box = yield The signup pages haml file: %h2 .block .content.login .flash - flash.each do |type, message| %div{ :class => "message #{type}" } %p= message = form_for(resource, :as => resource_name, :url => registration_path(resource_name)) do |f| = devise_error_messages! %div = f.label :firstname %br/ = f.text_field :firstname %div = f.label :middlename %br/ = f.text_field :middlename %div = f.label :lastname %br/ = f.text_field :lastname %div = f.label :email %br/ = f.email_field :email %div = f.label :password %br/ = f.password_field :password %div = f.label :academic %br/ = f.text_field :academic %div= f.submit "Continue" = render :partial => "devise/shared/links" I used web-app-theme to create an activo theme and then modify it.

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  • Problems by inserting values from textboxes

    - by simon
    I'm trying to insert the current date to the database and i allways get the message(when i press the button on the form to save to my access database), that the data type is incorect in the conditional expression. the code: string conString = "Provider=Microsoft.Jet.OLEDB.4.0;" + "Data Source=C:\\Users\\Simon\\Desktop\\save.mdb"; OleDbConnection empConnection = new OleDbConnection(conString); string insertStatement = "INSERT INTO obroki_save " + "([ID_uporabnika],[ID_zivila],[skupaj_kalorij]) " + "VALUES (@ID_uporabnika,@ID_zivila,@skupaj_kalorij)"; OleDbCommand insertCommand = new OleDbCommand(insertStatement, empConnection); insertCommand.Parameters.Add("@ID_uporabnika", OleDbType.Char).Value = users.iDTextBox.Text; insertCommand.Parameters.Add("@ID_zivila", OleDbType.Char).Value = iDTextBox.Text; insertCommand.Parameters.Add("@skupaj_kalorij", OleDbType.Char).Value = textBox1.Text; empConnection.Open(); try { int count = insertCommand.ExecuteNonQuery(); } catch (OleDbException ex) { MessageBox.Show(ex.Message); } finally { empConnection.Close(); textBox1.Clear(); textBox2.Clear(); textBox3.Clear(); textBox4.Clear(); textBox5.Clear(); } I have now cut out the date,( i made access paste the date ), still there is the same problem. Is the first line ok? users.idtextbox.text? Please help !

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  • PHP Treat String as Variable

    - by Ygam
    Hi guys. I have a piece of code here that does not work despite me using a $$ on it to treat the string as a variable: <? foreach (KOHANA::config('list.amenities_forms') as $k => $v) : ?> <div class="form"> <fieldset> <legend><?php echo $v ?></legend> <input type="checkbox" name="<?=$k?>flag" id="<?=$k?>flag"/> <label class="inline"><?=$v?></label> <label>Description</label> <textarea cols="50" rows="5" name="<?=$k?>[]"><?= empty($$k[0]) ? '' : $$k[0]?></textarea> <label>Size</label> <input type="text" name="<?=$k?>[]" value="<?= empty($$k[1]) ? '' : $$k[1]?>"/> <label>Capacity</label> <input type="text" name="<?=$k?>[]" value="<?= empty($$k[2]) ? '' : $$k[2]?>"/> </fieldset> </div> <? endforeach?> the function Kohana::config returns this array: 'amenities_forms' => array( 'meeting_space' => 'Meeting Space', 'breakfast_room' => 'Breakfast Room', 'living_quarters' => 'Living Quarters', 'restaurant' => 'Restaurant', 'bar' => 'Bar' ) what could I be doing wrong?

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  • Lift XML Parsing Error

    - by bstevens90
    I know there are other questions on this and I have read through almost all of them and none of them solved my problem. I have inside a home directory: def search(in: NodeSeq) : NodeSeq = { bind("work", in, "docId" -> text("", did = _), "visitId" -> text("", vid = _), "provider" -> text("", prov = _), "emCode" -> text(ecode, ecode = _)) } along with: <lift:home.searchForm form="POST" multipart="true" > <table> <tr> <td>DocId</td> <td>VisitId</td> <td>Provider</td> <td>EanMCode</td> </tr> <tr> <td><work:docId /></td> <td><work:visitId /></td> <td><work:provider /></td> <td><work:emCode /></td> <td><button>Click Me!</button></td> </tr> </table> </lift:home.searchForm> Inside an html page. I have included xmlns:lift="http://liftweb.net/" in default.... I can't find anyway to fix this... I am getting XML Parsing Error: prefix not bound to a namespace Location: http://localhost:8080/ Line Number 29, Column 10: <td><work:docId></work:docId></td> in firefox. I have written similar code and had it working in another app and just cant even find anything im doing different thats not trivial naming... Thanks in advance!

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  • Getting progress reports from a layered worker class?

    - by Slashdev
    I have a layered worker class that I'm trying to get progress reports from. What I have looks something like this: public class Form1 { private void Start_Click() { Controller controller = new Controller(); controller.RunProcess(); } } public class Controller { public void RunProcess() { Thread newThread = new Thread(new ThreadStart(DoEverything)); newThread.Start(); } private void DoEverything() { // Commencing operation... Class1 class1 = new Class1(); class1.DoStuff(); Class2 class2 = new Class2(); class2.DoMoreStuff(); } } public class Class1 { public void DoStuff() { // Doing stuff Thread.Sleep(1000); // Want to report progress here } } public class Class2 { public void DoMoreStuff() { // Doing more stuff Thread.Sleep(2000); // Want to report progress here as well } } I've used the BackgroundWorker class before, but I think I need something a bit more free form for something like this. I think I could use a delegate/event solution, but I'm not sure how to apply it here. Let's say I've got a few labels or something on Form1 that I want to be able to update with class1 and class2's progress, what's the best way to do that?

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  • How to parse a custom XML-style error code response from a website

    - by user1870127
    I'm developing a program that queries and prints out open data from the local transit authority, which is returned in the form of an XML response. Normally, when there are buses scheduled to run in the next few hours (and in other typical situations), the XML response generated by the page is handled correctly by the java.net.URLConnection.getInputStream() function, and I am able to print the individual results afterwards. The problem is when the buses are NOT running, or when some other problem with my queries develops after it is sent to the transit authority's web server. When the authority developed their service, they came up with their own unique error response codes, which are also sent as XMLs. For example, one of these error messages might look like this: <Error xmlns:i="http://www.w3.org/2001/XMLSchema-instance"> <Code>3005</Code> <Message>Sorry, no stop estimates found for given values.</Message> </Error> (This code and similar is all that I receive from the transit authority in such situations.) However, it appears that URLConnection.getInputStream() and some of its siblings are unable to interpret this custom code as a "valid" response that I can handle and print out as an error message. Instead, they give me a more generic HTTP/1.1 404 Not Found error. This problem cascades into my program which then prints out a java.io.FileNotFoundException error pointing to the offending input stream. My question is therefore two-fold: 1. Is there a way to retrieve, parse, and print a custom XML-formatted error code sent by a web service using the plugins that are available in Java? 2. If the above is not possible, what other tools should I use or develop to handle such custom codes as described?

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  • How Does MVC Handle Missing Data Requirements

    - by Don Bakke
    I'm teaching myself MVC concepts in hopes of applying them to a non-OO/procedural development environment. I am pretty sure I understand simple View - Request - Controller - Request - Model - Response - Controller - Response - View flow. What I am struggling with is understanding more complex scenarios. For instance, let's say I have a shopping cart form with a button for 'Calculate Shipping'. Normally a click on this button will follow the above flow. But what if there is missing data, like the zip code? Should the View verify this first and alert the user before making a 'Calculate Shipping' request? Or should the request be made and the Model returns a notification that critical data is missing? If the latter, does the Controller instruct the View to alert the user? What if I wanted to prompt the user for the missing zip code (perhaps in a popup input display) and then automatically request the 'Calculate Shipping' method again? I suppose this gets into the question of how smart a View ought to be. It seems that MVC has evolved due to richer UI and automation (such as with data-binding) and this muddies the water from a purist MVC perspective. Any thoughts are greatly appreciated.

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  • Struggling to create correct relationships in MS Access

    - by Yandawl
    http://img714.imageshack.us/img714/7820/croppercapture1.png Basically: an award(course) has many units, which can be either optional or core(mandatory), depending on the award. So for example: the unit 'Advanced Software Engineering' maybe a core unit for the award 'Software Engineering BSc' but only an optional unit for the course 'Web Technology BSc'. I've used flags for that purpose. A student is enrolled on an award so I need to get a complete list of core and optional units (bearing in mind that a student chooses 1 out of many possible optional units). Also, these units have events, e.g, a lecture, workshop or seminar, etc. and those events have sessions or instances of events where students enrolled on that particular unit are required to attend, and those attendances are stored in a separate table to form a register. So I need a hierarchy of expanding the tables something like this I guess: Awards - Students - Units - Sessions - Attendances Any help with this would be appreciated... It's blowing my mind and I'm really close to going insane! My tutor didn't spot I'd got it wrong when I showed my original data model to him and it's due in next week! Thank you :D

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  • DataGridView not displaying a row after it is created

    - by joslinm
    Hi, I'm using Visual Studio 10 and I just created a Database using SQL Server CE. Within it, I made a table CSLDataTable and that automatically created a CSLDataSet & CSLDataTableTableAdapter. The three variables were automatically created in my MainWindow.cs class: cSLDataSet cSLDataTableTableAdapter cSLDataTableBindingSource I have added a DataGridView in my Form called dataGridView and datasource cSLDataTableBindingSource. In my MainWindow(), I tried adding a row as a test: public MainWindow() { InitializeComponent(); CSLDataSet.CSLDataTableRow row = cSLDataSet.CSLDataTable.NewCSLDataTableRow(); row.File_ = "file"; row.Artist = "artist11"; row.Album = "album"; row.Save_Structure = "save"; row.Sent = false; row.Error = true; row.Release_Format = "release"; row.Bit_Rate = "bitrate.."; row.Year = "year"; row.Physical_Format = "format"; row.Bit_Format = "bitformat"; row.File_Path = "File!!path"; row.Site_Origin = "what"; cSLDataSet.CSLDataTable.Rows.Add(row); cSLDataSet.AcceptChanges(); cSLDataTableTableAdapter.Fill(cSLDataSet.CSLDataTable); cSLDataTableTableAdapter.Update(cSLDataSet); dataGridView.Refresh(); dataGridView.Update(); } In regards to the DataSet methods I tried calling, I had been trying to find a "correct" way to interact with the adapter, dataset, and datatable to successfully show the row, but to no avail. I'm rather new to using SQL Server CE Database, and read a lot of the MSDN sites & thought I was on the right track, but I've had no luck. The DataGridView shows the headers correctly, but that new row does not show up.

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  • Get Ajax4JSF (a4j component) running on Glassfish

    - by yournamehere
    I'm trying to build an JEE6-application on Glassfish V3, using JSF 2.0, Weld, JPA2 and Maven. Now i'm having trouble getting a simple <a4j:support> running. This is the fragment of my little example. When typing something into the inputtext, the outputtext should automatically be updated. But nothing happens (not in Firefox, not in IE8). <ui:composition xmlns:a4j="https://ajax4jsf.dev.java.net/ajax" (...)> <h:inputText value="#{personHome.message}"> <a4j:support event="onkeyup" reRender="repeater"/> </h:inputText> <h:outputText id="repeater" value="#{personHome.message}"/> Beside that my example doesn't work, my problem is also that i don't really understand if i need a JSF implementation (MyFaces, Richfaces, Primefaces etc.) or not to use a4j elements. Is it "built-in" in glassfish? Until now, i only have the following dependencies i think i need in for JSF: <dependency> <groupId>com.sun.faces</groupId> <artifactId>jsf-api</artifactId> <version>2.0.2</version> </dependency> <dependency> <groupId>com.sun.faces</groupId> <artifactId>jsf-impl</artifactId> <version>2.0.2</version> </dependency>I'm trying to build an JEE6-application on Glassfish V3, using JSF 2.0, Weld, JPA2 and Maven. <dependency> <groupId>javax</groupId> <artifactId>javaee-api</artifactId> <version>6.0</version> <scope>provided</scope> </dependency> So... what do i have to do to get Ajax4JSF running on a simple JEE-App on Glassfish? Any help is highly appreciated!

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  • PHP Post Count in Forum

    - by Chris
    I'm currently desiging a forum application, I considered using a premade but decided against it as it's useful for me to learn some of the techniques. So I've written a fairly full featured forum... great. One of the problems I want to solve is to include user data for each post, at the minute the post table includes the poster ID (obviously) and I added the poster's username at a later date so I didn't have to query the User DB for X number of posts in a thread. However, it's become apparent I now want to do this, usernames don't need to update retrospectively, however avatars, sigs, and especially post counts need to update actively, so data in some form needs keeping up to date somewhere... What would be a good way of implementing this? I obviously don't want to include any more user data on the Posts DB table than necessary, but I'm struggling to find an easy way to do this short of querying the DB for each post in a thread, which is potentially going to create a lot of traffic. How have other people solved this, I've been examining the code on some other open source apps but I can't find what I'm looking for. Is it possible to select multiple records in one query? In which case I could build an array dynamically on each page request (eg 'SQL blah blah' then a for each loop to insert the ID's). Could I join the tables each time? Do I submit a query for each post? Hmm.

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  • Slow Databinding setup time in C# .NET 4.0

    - by Svisstack
    Hello, I have got a problem. I have windows forms application with dynamic generated layout, but i have a problem in performance. In this form i use DataBinding from .NET 4.0 and databinding after setup works fine, but he binding setup time for ONE control blocking my application on approx 0.7 second. I have some controls and time of binging setuping is around 2 minutes. I trying all possible solutions, I dont have any ideas without write self binding class. Why is wrong with my code? case "Boolean": { Binding b = new Binding("Checked", __bindingsource, __ep.Name); CheckBox cb = new CheckBox(); /* * HERE is the problem */ cb.DataBindings.Add(b); /* * HERE is the end of problem */ __flp.Controls.Add(cb); __bindingcontrol.AddBinding(b); break; } Without problem code lines all works fast and without binding ;-( but i want binding turn on in normal speed. PS1. I have suspended layout in generation time. PS2. I have same problem with binding TextBox'es, PictureBoxe's, CheckBox is only example. How to do that?

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  • Session cookie not being created in Rails, very rarely and frustratingly.

    - by James
    Hi everyone, This is an issue sporadically for very few users, however we haven't been able to replicate it. However I have now got a Chrome instance (Mac) which is reproducing the error (for some unknown reason), and I hope to not restart it until I have this nailed! Rails application, using memcached for session store. While the bug manifests in the _app_session_id cookie not being created, our javascript-generated cookie test and app-generated language cookies are being created successfully. This means that 422 / InvalidAuthToken errors are thrown for every form that is submitted by those afflicted - people can't log into the app. The error occurs across all browsers - had reports for IE7 and Firefox (which most users use). Switching to another browser often fixes the issue (though not always), and standard cache-cookie-clear tactics do not. So now that I have got Chrome open which is having the same issue - in development, staging and live environments (meaning http and https). All other browsers are fine. I've restarted the servers and restarted memcached. I don't really want to restart Chrome - in the risk that the issue does go away with that (having said that, it hasn't worked for users). I've been tcpdumping the requests - and although I'll keep digging, I'd love it if anyone had any suggestions, places to start looking, anything. This is really painful ;) Thanks!

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  • Converting currencies via intermediate currencies.

    - by chillitom
    class FxRate { string Base { get; set; } string Target { get; set; } double Rate { get; set; } } private IList<FxRate> rates = new List<FxRate> { new FxRate {Base = "EUR", Target = "USD", Rate = 1.3668}, new FxRate {Base = "GBP", Target = "USD", Rate = 1.5039}, new FxRate {Base = "USD", Target = "CHF", Rate = 1.0694}, new FxRate {Base = "CHF", Target = "SEK", Rate = 8.12} // ... }; Given a large yet incomplete list of exchange rates where all currencies appear at least once (either as a target or base currency): What algorithm would I use to be able to derive rates for exchanges that aren't directly listed? I'm looking for a general purpose algorithm of the form: public double Rate(string baseCode, string targetCode, double currency) { return ... } In the example above a derived rate would be GBP-CHF or EUR-SEK (which would require using the conversions for EUR-USD, USD-CHF, CHF-SEK) Whilst I know how to do the conversions by hand I'm looking for a tidy way (perhaps using LINQ) to perform these derived conversions perhaps involving multiple currency hops, what's the nicest way to go about this?

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  • Patterns for non-layered applications

    - by Paul Stovell
    In Patterns of Enterprise Application Architecture, Martin Fowler writes: This book is thus about how you decompose an enterprise application into layers and how those layers work together. Most nontrivial enterprise applications use a layered architecture of some form, but in some situations other approaches, such as pipes and filters, are valuable. I don't go into those situations, focussing instead on the context of a layered architecture because it's the most widely useful. What patterns exist for building non-layered applications/parts of an application? Take a statistical modelling engine for a financial institution. There might be a layer for data access, but I expect that most of the code would be in a single layer. Would you still expect to see Gang of Four patterns in such a layer? How about a domain model? Would you use OO at all, or would it be purely functional? The quote mentions pipes and filters as alternate models to layers. I can easily imagine a such an engine using pipes as a way to break down the data processing. What other patterns exist? Are there common patterns for areas like task scheduling, results aggregation, or work distribution? What are some alternatives to MapReduce?

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  • convincing C# compiler that execution will stop after a member returns

    - by Sarah Vessels
    I don't think this is currently possible or if it's even a good idea, but it's something I was thinking about just now. I use MSTest for unit testing my C# project. In one of my tests, I do the following: MyClass instance; try { instance = getValue(); } catch (MyException ex) { Assert.Fail("Caught MyException"); } instance.doStuff(); // Use of unassigned local variable 'instance' To make this code compile, I have to assign a value to instance either at its declaration or in the catch block. However, Assert.Fail will never, to the best of my knowledge, allow execution to proceed past it, hence instance will never be used without a value. Why is it then that I must assign a value to it? If I change the Assert.Fail to something like throw ex, the code compiles fine, I assume because it knows that exception will disallow execution to proceed to a point where instance would be used uninitialized. So is it a case of runtime versus compile-time knowledge about where execution will be allowed to proceed? Would it ever be reasonable for C# to have some way of saying that a member, in this case Assert.Fail, will never allow execution after it returns? Maybe that could be in the form of a method attribute. Would this be useful or an unnecessary complexity for the compiler?

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  • Php code works on every browser but not on IE8, help please

    - by DomingoSL
    I think the error has to be in a incompatibility with IE8 and the cookies manipulation, cuz in IE8 you can see the password and login asking screen but when you enter the data and send it the browser seems to do nothing, this is a url you were you can try my code: http://200.8.27.127/tiempo/teacher.php and this is the code: <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta content="it" http-equiv="Content-Language" /> <meta content="text/html; charset=utf-8" http-equiv="Content-Type" /> <title>Formulario</title> <style type="text/css"> h1 { font: 50px Tahoma, Helvetica, Arial, Sans-Serif; text-align: center; color: #111; text-shadow: 0px 2px 3px #555; } h2 { font: 14px Tahoma, Helvetica, Arial, Sans-Serif; text-align: center; color: #CCC; text-shadow: 0px 1px 2px #555; } h3 { font: 10px Tahoma, Helvetica, Arial, Sans-Serif; text-align: center; color: #CCC; } b1 { font: 16px Tahoma, Helvetica, Arial, Sans-Serif; color: #DDD; } b2 { font: 10px Tahoma, Helvetica, Arial, Sans-Serif; color: #F9F7ED; } .caja { width: 690px; height: 40px; background-color: transparent; border: 0px solid #000000; font-size:x-large; color: #222; font-family: 'Trebuchet MS', 'Lucida Sans Unicode', 'Lucida Grande', 'Lucida Sans', Arial, sans-serif; font-weight: bold;" size="299"; } .style1 { text-align: right; } </style> </head> <body style="background-image: url('IMG/bg.png')"> <script type="text/javascript" src="JS/jquery-1.4.2.min.js"></script> <script type="text/javascript" src="JS/jquery.notifications-1.1.min.js"></script> <link rel="stylesheet" type="text/css" href="JS/jquery.notifications.css" /> <script> function checkCharCount(textfield) { if(textfield.value.length > 300) textfield.value = textfield.value.substr(0, 300); document.getElementById("charCounter").innerHTML = 300 - textfield.value.length; } </script> <?php include("/LIB/HeadSQL.php"); include("/LIB/error.php"); if (isset($_COOKIE['ID_tablon'])) { $username = $_COOKIE['ID_tablon']; $pass = $_COOKIE['Key_tablon']; $check = mysql_query("SELECT * FROM usuarios WHERE nombre = '$username'") or die(mysql_error()); while($info = mysql_fetch_array( $check )) { if ($pass != $info['clave']) { login(); } else { entro($info['email'],$username); } } } else { login(); } function login() { if (isset($_POST['quiere'])) { if(!$_POST['username'] | !$_POST['pass']) { include("LIB/login.php"); error('Debes llenar todos los campos.',0); } else { $check = mysql_query("SELECT * FROM usuarios WHERE nombre = '".$_POST['username']."'") or die(mysql_error()); $check2 = mysql_num_rows($check); if ($check2 == 0) { include("LIB/login.php"); error('Ese usuario no existe.',0); } while($info = mysql_fetch_array( $check )) { $_POST['pass'] = stripslashes($_POST['pass']); $info['clave'] = stripslashes($info['clave']); //$_POST['pass'] = md5($_POST['pass']); if ($_POST['pass'] != $info['clave']) { include("LIB/login.php"); error('La clave es incorrecta.',0); } else { $_POST['username'] = stripslashes($_POST['username']); $hour = time() + 3600; setcookie("ID_tablon", $_POST['username'], $hour); setcookie("Key_tablon", $_POST['pass'], $hour); entro($info['email'],$_POST['username']); } } } } else { include("LIB/login.php"); } exit; } function entro($email,$username) { ?> <div id="todo" align="center" > <div id="cabeza" style="width:850px;height:100px"> </div> <div id="contenido" style="width:850px;height:420px;background-image: url(IMG/cuadro.png)" > <div id="titulo" style="width:765px;height:75px;padding-top: 18px;margin: auto;text-align: left;"> <b1>Bienvenido <b><?php echo($username); ?></b></b1><br> <?php $check = mysql_query("SELECT * FROM sms WHERE ref = '".$username."' ORDER BY fecha DESC LIMIT 0, 1") or die(mysql_error()); while($info = mysql_fetch_array( $check )) { echo("<b1> Tu ultimo mensaje enviado fue: </b1><b2>" . $info['texto'] . " enviado el " . $info['fecha'] . "</b2>"); } ?> </div> <form method="post"> <div id="formulario" style="width:850px;height:255px;margin-top: 10px"> <div id="foto" align="right" style="width:725px; height:40px;padding-top: 11px;margin: auto"> <?php $size = 60; $grav_url = "http://www.gravatar.com/avatar/" . md5( strtolower( $email ) ) . "?size=" . $size; $size = 256; $grav_urlB = "http://www.gravatar.com/avatar/" . md5( strtolower( $email ) ) . "?size=" . $size; echo('<img alt="Image" src="' . $grav_url . '" />'); ?> </div> <div id="texto" style="width:850px;height:29px; margin-top: 38px;margin-left: 4px"> <input name="sms" type="text" onKeyUp="checkCharCount(this)" class="caja" /> </div> <div id="botones" style="width:725px;height:27px; margin-top: 15px" class="style1"> <input name="usuario" type="hidden" value="<?php echo($username); ?>" /> <input name="Submit1" type="image" value="submit" src="IMG/envia.png" /> </div> <div id="resta" style="width:850px;height:29px; margin-top: 53px;margin-left: 4px"> <h2><span id="charCounter">300</span> caracteres restantes.</h2> <h3><a href=logout.php>Cerrar Sesion</a></h3> </div> </div> </form> </div> </div> </body> </html> <?php session_start(); if (isset($_POST['Submit1'])) { if (isset($_SESSION['token']) && (time() - $_SESSION['token']) < 5) { error('Debes esperar 5 segundos para poder enviar otra informacion.',0); } else { $_SESSION['token'] = time(); include("/LIB/HeadSQL.php"); include("/LIB/comprueba.php"); $insert = "INSERT INTO sms (ref, texto, fecha) VALUES ('" . addslashes($_POST['usuario']) . "', '" . addslashes($_POST['sms']) . "', NOW() )"; $add_member = mysql_query($insert); error("Tu mensage ha sido enviado con exito.",1); } } exit; } ?> do you think the isuue can be on the javascript? try the code firts with Firefox or google chrome, then try in IE8.

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  • Multiplication of 2 positive numbers giving a negative result

    - by krandiash
    My program is an implementation of a bloom filter. However, when I'm storing my hash function results in the bit array, the function (of the form f(i) = (a*i + b) % m where a,b,i,m are all positive integers) is giving me a negative result. The problem seems to be in the calculation of a*i which is coming out to be negative. Ignore the print statements in the code; those were for debugging. Basically, the value of temp in this block of code is coming out to be negative and so I'm getting an ArrayOutOfBoundsException. m is the bit array length, z is the number of hash functions being used, S is the set of values which are members of this bloom filter and H stores the values of a and b for the hash functions f1, f2, ..., fz. public static int[] makeBitArray(int m, int z, ArrayList<Integer> S, int[] H) { int[] C = new int[m]; for (int i = 0; i < z; i++) { for (int q = 0; q < S.size() ; q++) { System.out.println(H[2*i]); int temp = S.get(q)*(H[2*i]); System.out.println(temp); System.out.println(S.get(q)); System.out.println(H[2*i + 1]); System.out.println(m); int t = ((H[2*i]*S.get(q)) + H[2*i + 1])%m; System.out.println(t); C[t] = 1; } } return C; } Any help is appreciated.

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