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• What HTTP headers are required to refresh a page on back button.

  - by cantabilesoftware

  I'm trying to get a page to refresh when navigated to from the back button. From what I understand after reading around a bit I should just need to mark the page as uncacheable but I can't get any browsers to refresh the page. These are the headers I've currently got: Cache-Control:no-cache Connection:keep-alive Content-Encoding:gzip Content-Length:1832 Content-Type:text/html; charset=utf-8 Date:Mon, 07 Jun 2010 14:05:39 GMT Expires:-1 Pragma:no-cache Server:Microsoft-IIS/7.5 Vary:Accept-Encoding Via:1.1 smoothwall:800 (squid/2.7.STABLE6) X-AspNet-Version:2.0.50727 X-AspNetMvc-Version:2.0 X-Cache:MISS from smoothwall X-Powered-By:ASP.NET Why would the browser pull this page from it's browser history and not refresh it?

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• .NET generic class instance - passing a variable data type

  - by FerretallicA

  As the title suggests, I'm tyring to pass a variable data type to a template class. Something like this: frmExample = New LookupForm(Of Models.MyClass) 'Works fine Dim SelectedType As Type = InstanceOfMyClass.GetType() 'Works fine frmExample = New LookupForm(Of SelectedType) 'Ba-bow! frmExample = New LookupForm(Of InstanceOfMyClass.GetType()) 'Ba-bow! LookupForm<Models.MyClass> frmExample; Type SelectedType = InstanceOfMyClass.GetType(); frmExample = new LookupForm<SelectedType.GetType()>(); //Ba-bow frmExample = new LookupForm<(Type)SelectedType>(); //Ba-bow I'm assuming it's something to do with the template being processed at compile time but even if I'm off the mark there, it wouldn't solve my problem anyway. I can't find any relevant information on using Reflection to instance template classes either. (How) can I create an instance of a dynamically typed repository at runtime?

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• Nginx + PHP-FPM Too Many Resources

  - by user3393046

  My Server has the following Specs CPU: 6 Cores Intel(R) Xeon(R) CPU E5-2650 v2 @ 2.60GHz RAM: 32 GB I have a problem with nginx+php-fpm. They are taking too many resources for an unknown reason. Even if i restart the nginx + php-fpm the start up processes will use many resources. My nginx Config is the following: user nginx; worker_processes auto; error_log /var/log/nginx/error.log warn; pid /var/run/nginx.pid; worker_rlimit_nofile 300000; events { worker_connections 6000; use epoll; } http { include /etc/nginx/mime.types; default_type application/octet-stream; log_format main '$remote_addr - $remote_user [$time_local] "$request" ' '$status $body_bytes_sent "$http_referer" ' '"$http_user_agent" "$http_x_forwarded_for"'; access_log /var/log/nginx/access.log main; sendfile on; #tcp_nopush on; keepalive_timeout 65; #gzip on; include /etc/nginx/conf.d/*.conf; } My php-fpm pool config is the following [www] user = nginx group = nginx listen = /var/run/php5-fpm.sock listen.owner = nginx listen.group = nginx listen.allowed_clients = 127.0.0.1 pm = ondemand pm.max_children = 1500; pm.process_idle_timeout = 5; chdir = / security.limit_extensions = .php I'm using on pm.ondemand since my website has to support many concurrent connections at the same time and i was unable to to it with dynamic/static. I guess this isnt the problem because as i said earlier when i restart nginx+php-fpm at the same time, they are taking too much resources without any request. Here is the screenshot with the CPU Usage http://s28.postimg.org/v54q25zod/Untitled.png

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• Apache, Tomcat and mod_jk for load balancing

  - by pHk

  Hi guys. I've set-up a basic Apache (2.2.x) and Tomcat (6.0.x) set-up using mod_jk for load balancing using the worker.properties file. Preliminary testing seems to show that this works relatively well, and it was quite easy to set-up. However; the fact that it was so easy to set-up has got me a little worried. We're dealing with 100 - 300 concurrent users using the same web application (deployed on 2 or 3 Tomcat instances). I have done a little Googling and looking around on here and there seems to be more than 1 way to accomplish this (one example on here used a balancer:// style URL, which I've never seen before in an Apache config). For example, one question I ask myself is how reliable the load detection on mod_jk really is (Busyness, Session, Request, etc). In your experience, does this set-up prove to be reliable in real world scenarios? Any pointers on improvements, pit falls or interesting literature/articles? I've worked with Apache before, but am in no way an expert. Thanks in advance.

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• What are your favorite extension methods for C#/.NET? (codeplex.com/extensionoverflow)

  - by bovium

  Let's make a list of answers where you post your excellent and favorite extension methods. The requirement is that the full code must be posted and a example and an explanation on how to use it. Based on the high interest in this topic I have setup an Open Source Project called extensionoverflow on Codeplex. Please mark your answers with an acceptance to put the code in the Codeplex project. Please post the full sourcecode and not a link. Codeplex News: 11.11.2008 XmlSerialize / XmlDeserialize is now Implemented and Unit Tested. 11.11.2008 There is still room for more developers. ;-) Join NOW! 11.11.2008 Third contributer joined ExtensionOverflow, welcome to BKristensen 11.11.2008 FormatWith is now Implemented and Unit Tested. 09.11.2008 Second contributer joined ExtensionOverflow. welcome to chakrit. 09.11.2008 We need more developers. ;-) 09.11.2008 ThrowIfArgumentIsNull in now Implemented and Unit Tested on Codeplex.

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• Visual Studio add-in for performance benchmarking

  - by chiccodoro

  I'd like to measure the performance of some code blocks in my c# winforms application. In particular I want to measure performance regression/improvement after some restructuring of the code. So long I've seen the System.Diagnostics.Stopwatch. However, I want to avoid writing measuring code into my classes, I would rather prefer to separate measuring from actual code. As for debugging, you can set breakpoints on several code lines and "jump" from one to the next by "Continue Execution", I imagine something similar for measuring: Mark to lines of code and make Visual Studio display the time elapsing from one to the next. Is there any feature/add-in in that direction?

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• Under what conditions will sendmail try to immediately resend a message instead of waiting for the standard requeue interval?

  - by Mike B

  CentOS 5.8 | Sendmail 8.14.4 I used to think that if SendMail experienced a temporary (400-class) error during delivery, it would place the message in a deferred queue (e.g. /var/spool/mqueue) and retry an hour later. For the most part, that appears to be the case. But every now and then, I'll notice log entries like this (email/domains renamed to protect the innocent :-) ) : Dec 5 01:43:03 foobox-out sendmail [11078]: qBE3l7js123022: to=<[email protected]>, delay=00:00:00, xdelay=00:00:00, mailer=relay, pri=124588, relay=exbox.foo.com. [10.10.10.10], dsn=4.0.0, stat=Deferred: 421 4.3.2 The maximum number of concurrent connections has exceeded a limit, closing transmission channel Dec 5 01:53:34 foobox-out sendmail [12763]: qBE3l7js123022: to=<[email protected]>, delay=00:10:31, xdelay=00:00:00, mailer=relay, pri=214588, relay=exbox.foo.com., dsn=4.0.0, stat=Deferred: 452 4.3.1 Insufficient system resources Dec 5 02:53:35 foobox-out sendmail [23255]: qBE3l7js123022: to=<[email protected]>, delay=01:10:32, xdelay=00:00:01, mailer=relay, pri=304588, relay=exbox.foo.com. [10.10.10.10], dsn=2.0.0, stat=Sent (<[email protected]> Queued mail for delivery) Why did Sendmail try again just 10 minutes after the first attempt and then wait another hour before trying again? If this is expected behavior, what scenarios will cause this faster requeue interval to occur?

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• Server configration for our website [duplicate]

  - by Varun Varunesh

  This question already has an answer here: Can you help me with my capacity planning? 2 answers We are a start-up and 6 month back we have launched our beta version website. Now we are in a phase of building our website and web-services for the final product. This website will be based on PHP, Python, MySql database and with wamp server. Right now in the beta version we are using Azure VM for hosting, with configuration of 786MB RAM and Shared CPU. We have 200 avg users daily coming to our website. Now we are trying to increase the number of users from 200 to 1500 daily users. And I am thinking our server should have capability to handle at least 100 concurrent user. Also we have developed web-services for our mobile-apps. Which can also increase loads on the sever. So here are the question that takes me here, I am pretty much confused about whether to go with shared hosting or VM based hosting. If VM, then what configuration will be best for our requirement (as I discussed above) ? Currently our VM is a Windows based server and its very simple to manage, So other than cost factor why should I go for Linux based sever? What other factor should I keep in mind while choosing the server as per our requirement ?

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• Regular expressions and matching URLs with metacharacters

  - by James P.

  I'm having trouble finding a regular expression that matches the following String. Korben;http://feeds.feedburner.com/KorbensBlog-UpgradeYourMind?format=xml;1 One problem is escaping the question mark. Java's pattern matcher doesn't seem to accept \? as a valid escape sequence but it also fails to work with the tester at myregexp.com. Here's what I have so far: ([a-zA-Z0-9])+;http://([a-zA-Z0-9./-]+);[0-9]+ Any suggestions? Edit: The original intent was to match all URLs that could be found after the first semi colon.

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• Which edition of windows internals should I read?

  - by pecker

  Hello, I want to get into windows driver development. I heard from the community that before diving into driver development one must be familiar with windows internals that means one must read "Windows Internals by Mark Russinovich. I'm going to buy this book today. Which edtition should I buy? 4th edition covers Windows XP & Windows 2003 where as 5th edition covers Windows Vista & windows server 2008. I don't know in driver world how much difference this thing would make. How different are these two editions? should I first read 4th edition & then come to 5th or should I directly dive into 5th?

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• How do I get a count of events each day with SQL?

  - by upl8

  I have a table that looks like this: Timestamp Event User ================ ===== ===== 1/1/2010 1:00 PM 100 John 1/1/2010 1:00 PM 103 Mark 1/2/2010 2:00 PM 100 John 1/2/2010 2:05 PM 100 Bill 1/2/2010 2:10 PM 103 Frank I want to write a query that shows the events for each day and a count for those events. Something like: Date Event EventCount ======== ===== ========== 1/1/2010 100 1 1/1/2010 103 1 1/2/2010 100 2 1/2/2010 103 1 The database is SQL Server Compact, so it doesn't support all the features of the full SQL Server. The query I have written so far is SELECT DATEADD(dd, DATEDIFF(dd, 0, Timestamp), 0) as Date, Event, Count(Event) as EventCount FROM Log GROUP BY Timestamp, Event This almost works, but EventCount is always 1. How can I get SQL Server to return the correct counts? All fields are mandatory.

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• c# multi threaded file processing

  - by user177883

  There is a folder that contains 1000 of small text files. I aim to parse and process all of them while more files are being populated in to the folder. My intention is to multithread this operation as the single threaded prototype took 6 minutes to process 1000 files. I like to have reader and writer thread(s) as following : while the reader thread(s) are reading the files, I d like to have writer thread(s) to process them. Once the reader is started reading a file, I d like to mark it as being processed, such as by renaming it, once it s read, rename it to completed. How to approach such multithreaded application ? Is it better to use a distributed hash table or a queue? Which data structure to use that would avoid locks? Would you have a better approach to this scheme that you like to share?

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• Passing in a value to a usercontrol through a foreach loop

  - by LooDaFunk

  in my asp.net mark up I have a foreach loop that iterates through a simple list. In this foreach loop I am adding a new user control and attempting to pass in the value from the loop. However, this value just wont budge and get inside that damn control! Anyone have any suggestions? <%foreach (userInfo i in this.items) { %> <uc1:ItemControl ID="ItemControl" runat="server" UserID='<%#Eval("userID") %>'/> <%} %> userID is a public property in the control, when it goes to set, the value is just literally : <%#Eval("userID") %. I've tried #Bind and =Value but nothing seems to work. Any help would be appreciated!

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• add text to curved image

  - by miki123

  $config['source_image'] = '/path/to/image/mypic.jpg'; $config['wm_text'] = 'Copyright 2006 - John Doe'; $config['wm_type'] = 'text'; $config['wm_font_path'] = './system/fonts/texb.ttf'; $config['wm_font_size'] = '16'; $config['wm_font_color'] = 'ffffff'; $config['wm_vrt_alignment'] = 'bottom'; $config['wm_hor_alignment'] = 'center'; $config['wm_padding'] = '20'; $this->image_lib->initialize($config); $this->image_lib->watermark(); This is water mark code in php, it is working fine when we add text to curve image like mug image, the letter is not overlap the curved image how can we overcome?

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• What are your favorite extension methods for C#? (codeplex.com/extensionoverflow)

  - by bovium

  Let's make a list of answers where you post your excellent and favorite extension methods. The requirement is that the full code must be posted and a example and an explanation on how to use it. Based on the high interest in this topic I have setup an Open Source Project called extensionoverflow on Codeplex. Please mark your answers with an acceptance to put the code in the Codeplex project. Please post the full sourcecode and not a link. Codeplex News: 11.11.2008 XmlSerialize / XmlDeserialize is now Implemented and Unit Tested. 11.11.2008 There is still room for more developers. ;-) Join NOW! 11.11.2008 Third contributer joined ExtensionOverflow, welcome to BKristensen 11.11.2008 FormatWith is now Implemented and Unit Tested. 09.11.2008 Second contributer joined ExtensionOverflow. welcome to chakrit. 09.11.2008 We need more developers. ;-) 09.11.2008 ThrowIfArgumentIsNull in now Implemented and Unit Tested on Codeplex.

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• Entity data field validation and part data submission

  - by pradeeptp

  I have an entity class that has 10 fields. I am using MS Validation Application block to mark all fields as mandatory (IsRequired). I am implementing a securiy feature in which during updation of the data, not all the fields in the entity class will have data. For example a few users can only view 5 fileds while others all 10 fields during updation on GUI I have the following options 1) Bring all the data for all the fields from the DB table and hide the ones not accessible to the users in GUI. I am concerned about the performance because everytime GUI will pull unncessary data. 2) Bring the data (e.g. only 5 fields) that are permissible for access/view by the user on GUI. During submit, validation block will throw exception because all fields are marked as IsRequired and only data for 5 fields are sent back to the server. I want to know if there are any other good approaches to solve problems like this. I am using .NET 3.5 Thanks.

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• Configuring a MySQL 5.1 Instance on Windows 7 Professional x64 Fails

  - by Thomas Owens

  I'm trying to set up my laptops to function as mobile development environments. Installing the software on my Linux machine and getting it configured was fairly straightforward, however I'm having trouble getting MySQL 5.1 Server installed and configured on Windows 7 Professional 64-bit. I'm currently using the Windows MSI Installer for the complete MySQL 5.1 system (as opposed to the Essentials installer also available). I've tried to install using both the 32-bit and 64-bit versions of MySQL 5.1 - the same events occur in both. I've installed both the Server Instance Configuration Wizard and Workbench and everything appears to be installed just fine. When I open the Instance Configuration Wizard, I select Detailed Configuration. On the next screen, I select Development Environment, then Multifunctional Database on the next screen. I leave the InnoDB settings unchanged. I select Manual Setting with 5 concurrent connections. I enable TCP/IP Networking on Port 3306 and Enable Strict Mode. I select the Standard Character Set. I check the boxes for Install as a Windows Service (and provide the name "MySQL") and Include the Bin Directory in Windows PATH. On the next screen, I set my root user name and password. I do not enable root access from remote machines and I also do not create an anonymous account. On the final screen of the wizard, when I click "Execute", the first two tasks (Prepare Configuration and Write Configuration File) complete. However, when it reaches Start Service, the wizard hangs and becomes unresponsive ("Not Responding" appears in the title bar and Task Manager). I would really like to be able to use both my Windows and Linux laptops as full-blown mobile development environments, but I can't do that without being able to run MySQL. Has anyone encountered this problem before? What options do I have to correct it?

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• Referenced Assembly won't load

  - by Pavel

  I've got a visual studio 2010 project which publishes an assembly called myAssembly.ddl. I then want to reference myAssembly.dll from an existing vs 2008 project. If I try to load the reference it comes up with an yellow exclamation mark next to it, suggesting that the assembly wasn't loaded. However, I'm not getting any error messages during that process. Obviously, if i try to import the namespace in my code it doesn't compile. Converting myAssembly.dll to a .net version 3.5 doesn help. Nor does copying the assembly to a different directory and referencing it from there. Any ideas?

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• fixed-size tableView cell in iPhone?

  - by SeniorLee

  I want to have all same size(width) cells in tableView no matter what accessory they have. If text in a cell almost fits to a cell, If i click that cell, check mark(accessory at the right) is displayed and some of characters goes to next line. it's annyoing. It's ok to do wordwrap. I can adjust cell's height. But I dont' want a cell displays different number of characters in an line depends on it's clicked or not. How can I do that?? thanks.

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• Apache https is slsow

  - by raucous12

  Hey, I've set apache up to use SSL with a self signed certificate. With http (KeepAlive off), I can get over 5000 requests per second. However, with https, I can only get 13 requests per second. I know there is supposed to be a bit of an overhead, but this seems abnormal. Can anyone suggest how I might go about debugging this. Here is the ab log for https: Server Software: Apache/2.2.3 Server Hostname: 127.0.0.1 Server Port: 443 SSL/TLS Protocol: TLSv1/SSLv3,DHE-RSA-AES256-SHA,4096,256 Document Path: /hello.html Document Length: 29 bytes Concurrency Level: 5 Time taken for tests: 30.49425 seconds Complete requests: 411 Failed requests: 0 Write errors: 0 Total transferred: 119601 bytes HTML transferred: 11919 bytes Requests per second: 13.68 [#/sec] (mean) Time per request: 365.565 [ms] (mean) Time per request: 73.113 [ms] (mean, across all concurrent requests) Transfer rate: 3.86 [Kbytes/sec] received Connection Times (ms) min mean[+/-sd] median max Connect: 190 347 74.3 333 716 Processing: 0 14 24.0 1 166 Waiting: 0 11 21.6 0 165 Total: 191 361 80.8 345 716 Percentage of the requests served within a certain time (ms) 50% 345 66% 377 75% 408 80% 421 90% 468 95% 521 98% 578 99% 596 100% 716 (longest request)

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• Passing get values mangles my urls

  - by SibLiant

  Just upgraded from 1.3 to 2.0.3 and I'm trying to migrate all the changes. I'm noticing that the following line echo $this->Html->link('Quote', array('controller'=>'crm_quotes', 'action'=>'index', $lead['id'].'/'.$crmContact['CrmContact']['id']), null); builds the url "/crm_quotes/index/15/21". When I click the link I'm taken to url: "/crm_quotes/index/15%2F212 so it's replacing the characters with the html # but it's ultimately breaking the link. When I manually edit the URL to the correct one: "/crm_quotes/index/15/21" the page loads. Can someone enlighten me? Should I be using the url function rather than link? I have a lot of pages that need multiple parameters passed in the url. I was using named parameters but after reading some comments by Mark Story I decided to stop the named parameters as he hinted at their possible removal from future versions.

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• Decoupling into DAL and BLL - my concerns.

  - by novice_man

  Hi, In many posts concerning this topic I come across very simple examples that do not answer my question. Let's say a have a document table and user table. In DAL written in ADO.NET i have a method to retries all documents for some criteria. Now I the UI I have a case where I need to show this list along with the names of the creator. Up to know I have it done with one method in DAL containig JOIN statement. However eveytime I have such a complex method i have to do custom mapping to some object that doesn't mark 1:1 to DB. Should it be put into another layer ? If so then I will have to resing from join query for iteration through results and querying each document author. . . which doen't make sense... (performance) what is the best approach for such scenarios ?

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• Not able to see Images with wmd-editor

  - by KhanS

  I am using wmd editor to enter some text. After entering the text, I am saving it as mark down into the database. While inserting the image, if I save as markdown I am not able to see the image in my aspx page.(Because it down not save image in <img> tab in markdown). If I save the text as html then, I am able to see the image. But another problem with html is, while editing the text I am seeing all tags(such as <code1><p>pre> ) in the wmd-editor.

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• Sales figures not displayed in form

  - by Brian Wilson

  Trying to calculate total sales for 5 items, 3 stores. Here's a s/s of what Im getting, along with my code. What am I missing/doing wrong? (p.s. It's not returning an error code in 'debug') Public Class Form1 Private Sub btnCalc_Click(sender As Object, e As EventArgs) Handles btnCalc.Click Dim ttlsales As Double 'set up array data Dim sales(,) As Integer = {{25, 64, 23, 45, 14}, {12, 82, 19, 34, 63}, {54, 22, 17, 43, 35}} Dim price() As Double = {12.0, 17.95, 95.0, 86.5, 78.0} 'mark totals Dim totals(2) As Double For store As Integer = 0 To 2 For item As Integer = 0 To 4 Next Next 'display output lstOut.Items.Add("Sales Per Store") For store As Integer = 0 To 2 lstOut.Items.Add(store + 1 & ":" & FormatCurrency(totals(store))) ttlsales += totals(store) Next lstOut.Items.Add("Total Sales: " & FormatCurrency(ttlsales)) End Sub End Class

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• How can I search for an email using the zend framework?

  - by Ali

  Hi guys I need to build a functionality that involves searching through emails in an inbox for emails whose subjects match a certain user inputted keyword. SInce I'm using the zend framework I would like a solution that uses the zend framework libraries. Aside this I have noticed that the zend libraries are a bit limited with respect to my requirements for email handling. Is there any open library available in php which can be used for handling emails - when I mean handling emails I mean like: Ease to mark and flag emails Moving of emails from folder to folder. Parsing emails searching through emails SOrting emails etc - the stuff you would require if you wished to build a web client. EDIT ========= I'm looking for a generic solution here. The emails are in a regular email inbox on an IMAP server. I need a way to be able to read through and search for emails in the inbox using any specialized library to make it easier.

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