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• Eventlet or gevent or Stackless + Twisted, Pylons, Django and SQL Alchemy

  - by Khorkrak

  We're using Twisted extensively for apps requiring a great deal of asynchronous io. There are some cases where stuff is cpu bound instead and for that we spawn a pool of processes to do the work and have a system for managing these across multiple servers as well - all done in Twisted. Works great. The problem is that it's hard to bring new team members up to speed. Writing asynchronous code in Twisted requires a near vertical learning curve. It's as if humans just don't think that way naturally. We're considering a mixed approach perhaps. Maybe do the xmlrpc server part and process management in Twisted still but the other stuff in code that at least looks synchronous while not being as such. Then again I like explicit over implicit so hmmm. Anyway onto greenlets - how well does that stuff work? So there's Stackless and as you can see from my Gallentean avatar I'm well aware of the tremendous success in it's use for CCP's flagship EVE Online game first hand. What about Eventlet or gevent? Well for now only Eventlet works with Twisted. However gevent claims to be faster since it's not a pure python implementation it instead uses libevent. It also has fewer idiosyncrasies and defects supposedly. The documentation there is minimal in comparison to Eventlet and it's maintained by 1 guy as far as I can tell. This makes me leery but all great projects start this way so... Then there's PyPy - I haven't even finished reading about that one yet - just saw it in this thread: Drawbacks of Stackless. So confusing - I'm wondering what the heck to do - sounds like Eventlet is probably the best bet but is it really stable enough? Anyone out there have any experience with it? Should we go with Stackless instead as it's been around and is proven technology - just like Twisted is as well - and they do work together nicely. But still I hate having to have a separate version of Python to do this. what to do.... This somewhat obnoxious blog entry hit the nail on the head for me though: Asynchronous IO for Grownups We're stuck using MySQL as well - I never knew how great PostgreSQL was until having had to work on a production OLTP system in MySQL instead - but that's another story. But if that monkey patch thing really works then wow. Just wow.

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• Help with a compiler warning: Initialization from distinct Objective-C type when types match

  - by Alex Gosselin

  Here is the function where I get the compiler warning, I can't seem to figure out what is causing it. Any help is appreciated. -(void)displaySelector{ //warning on the following line: InstanceSelectorViewController *controller = [[InstanceSelectorViewController alloc] initWithCreator:self]; [self.navController pushViewController:controller animated:YES]; [controller release]; } Interface and implementation for the initWithCreator: method -(InstanceSelectorViewController*)initWithCreator:(InstanceCreator*)creator; -(InstanceSelectorViewController*)initWithCreator:(InstanceCreator*)crt{ if (self = [self initWithNibName:@"InstanceSelectorViewController" bundle:nil]) { creator = crt; } return self; }

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• How to write Haskell function to verify parentheses matching?

  - by Rizo

  I need to write a function par :: String -> Bool to verify if a given string with parentheses is matching using stack module. Ex: par "(((()[()])))" = True par "((]())" = False Here's my stack module implementation: module Stack (Stack, push, pop, top, empty, isEmpty) where data Stack a = Stk [a] deriving (Show) push :: a -> Stack a -> Stack a push x (Stk xs) = Stk (x:xs) pop :: Stack a -> Stack a pop (Stk (_:xs)) = Stk xs pop _ = error "Stack.pop: empty stack" top :: Stack a -> a top (Stk (x:_)) = x top _ = error "Stack.top: empty stack" empty :: Stack a empty = Stk [] isEmpty :: Stack a -> Bool isEmpty (Stk [])= True isEmpty (Stk _) = False So I need to implement a 'par' function that would test a string of parentheses and say if parentheses in it matches or not. How can I do that using a stack?

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• Cross-platform embedded database/key-value store for C#

  - by Arne Claassen

  I'm looking for a fast, embeddable key/value store with cursor semantics over key collections (or a simple embeddable DB) that I can use in .NET and mono. Need it to be open-source, would prefer an MIT or Apache style license over a GPL license. Not opposed to a library that needs bindings to be written, as long as binaries are available for both windows and linux. Options considered: SQLite - has bindings and native implementation, but single-threaded and not all that fast Embedded InnoDB - no .NET bindings i can find and it's GPLv2 Berkley DB - no .NET bindings i can find Tokyo Cabinet - no .NET bindings i can find and problematic to build on windows MadCow Memory-mapped data structures - GPLv2 Is there an option better than the above that i'm missing, or bindings for the above i don't know about?

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• WCF <operation>Async methods not generated in proxy interface

  - by Charlie

  I want to use the Asnyc methods rather than the Begin on my WCF service client proxy because I'm updating WPF controls and need to make sure they're being updated from the UI thread. I could use the Dispatcher class to queue items for the UI thread but that's not what I'm asking about.. I've configured the service reference to generate the asynchronous operations, but it only generates the methods in proxy's implementation, not it's interface. The interface only contains syncronous and Begin methods. Why aren't these methods generated in the interface and is there a way to do this, or do I have to create a derived interface to manually add them?

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• Why not port Linux kernel to Common Lisp?

  - by rplevy

  Conventional wisdom states that OS kernels must be written in C in order to achieve the necessary levels of performance. This has been the justification for not using more expressive high level languages. However, for a few years now implementations of Common Lisp such as SBCL have proven to be just as performant as C. What then are the arguments against redoing the kernel in a powerfully expressive language, namely Common Lisp? I don't think anyone (at least anyone who knows what they are talking about) could argue against the fact that the benefits in transparency and readability would be tremendous, not to mention all the things that can't be done in C that can be done in Lisp, but there may be implementation details that would make this a bad idea.

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• com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: Unknown command

  - by adisembiring

  Hi .. I'm trying to create datasource for connection pooling mysql database in Websphere Application Server. I've set the JDBC Provider, I set the Implementation class name : com.mysql.jdbc.jdbc2.optional.MysqlConnectionPoolDataSource my mysql driver 5.1.6. but I got this error while I try to connect the datasource: The test connection operation failed for data source btn_itb_ds on server server1 at node qnode with the following exception: com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: Unknown command. View JVM logs for further details. I have read this http://bugs.mysql.com/bug.php?id=38388 trouble shooting. But they just suggest to upgrade mysql driver version 5.1.X and I have do that. but I've got the same error.

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• Logging IP address for uniqueness without storing the IP address itself for privacy

  - by szabgab

  In a web application when logging some data I'd like to make sure I can identify data that came at differetn times but from the same IP address. On the other hand for privacy concerns as the data will be released publicly I'd like to make sure the actual IP cannot be retrieved. So I need some one way mapping of the IP addresses to some other strings that ensures 1-1 mapping. If I understand correctly then MD5, SHA1 or SHA256 could be a solution. I wonder if they are not too expensive in terms of processing needed? I'd be interested in any solution though if there is implementation in Perl that would be even better.

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• Conversion of bytes into a type without changing the application (ie storing the conversion method i

  - by geoaxis

  Is there a way to store a conversion strategy (for converting some bytes) into a database and then execute it on the run time. If one were to store a complete java file, you would need to compile it, store the class and some how inject into the already running system. I am not sure how this would be possible. But using some kind of dynamic language on JVM would be nice. I see an example of execution of groovy from within spring context here http://www.devx.com/tips/Tip/42789 but this is still static in nature as application context contains the reference to the implementation and cannot be changed by database. Perhaps with JavaConfig of context it is possible. I am exploring options now, specifically with Spring 3.0. Your suggestions in any direction would be welcome.

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• Embedded file system and sqlite

  - by Jeff Lamb

  I'm working on an embedded project that has no file system, and our kludge of a database has ballooned in functionality. It's now so inefficient, we can't stand it any longer. I'm trying to figure out if there's built-in support for a flat file system in SQLite. I've dug around http://sqlite.org for a while now, but haven't found anything specifically covering it. Has anyone found a supported implementation written in C? It seems like such a straightforward request, but I can't find anything written about it. We have plenty of memory available. In a perfect world, I'd like to just set aside a large portion of it, pass the FS a pointer, then let the FS/SQLite library just use what it wants.

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• Nested class or not nested class?

  - by eriks

  I have class A and list of A objects. A has a function f that should be executed every X seconds (for the first instance every 1 second, for the seconds instance every 5 seconds, etc.). I have a scheduler class that is responsible to execute the functions at the correct time. What i thought to do is to create a new class, ATime, that will hold ptr to A instance and the time A::f should be executed. The scheduler will hold a min priority queue of Atime. Do you think it is the correct implementation? Should ATime be a nested class of the scheduler?

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• Fluid CSS: floating column with max-width and overflow

  - by Ates Goral

  I'm using a fluid layout in the new theme that I'm working on for my blog. I often blog about code and include <pre> blocks within the posts. The float: left column for the content area has a max-width so that the column stops at a certain maximum width and can also be shrunk: +----------+ +------+ | text | | text | | | | | | | | | | | | | | | | | | | | | +----------+ +------+ max shrunk What I want is for the <pre> elements to be wider than the text column so that I can fit 80-character-wrapped code without horizontal scroll bars. But I want the <pre> elements to overflow from the content area, without affecting its fluidity: +----------+ +------+ | text | | text | | | | | +----------+--+ +------+------+ | code | | code | +----------+--+ +------+------+ | | | | +----------+ +------+ max shrunk But, max-width stops being fluid once I insert the overhanging <pre> in there: the width of the column remains at the specified max-width even when I shrink the browser beyond that width. I've reproduced the issue with this bare-minimum scenario: <div style="float: left; max-width: 460px; border: 1px solid red"> <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit</p> <pre style="max-width: 700px; border: 1px solid blue"> function foo() { // Lorem ipsum dolor sit amet, consectetur adipisicing elit } </pre> <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit</p> </div> I noticed that doing either of the following brings back the fluidity: Remove the <pre> (doh...) Remove the float: left The workaround I'm currently using is to insert the <pre> elements into "breaks" in the post column, so that the widths of the post segments and the <pre> segments are managed mutually exclusively: +----------+ +------+ | text | | text | +----------+ +------+ +-------------+ +-------------+ | code | | code | +-------------+ +-------------+ +----------+ +------+ +----------+ +------+ max shrunk But this forces me to insert additional closing and opening <div> elements into the post markup which I'd rather keep semantically pristine. Admittedly, I don't have a full grasp of how the box model works with floats with overflowing content, so I don't understand why the combination of float: left on the container and the <pre> inside it cripple the max-width of the container. I'm observing the same problem on Firefox/Chrome/Safari/Opera. IE6 (the crazy one) seems happy all the time. This also doesn't seem dependent on quirks/standards mode. Update I've done further testing to observe that max-width seems to get ignored when the element has a float: left. I glanced at the W3C box model chapter but couldn't immediately see an explicit mention of this behaviour. Any pointers?

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• Objective-C: how to prevent abstraction leaks

  - by iter

  I gather that in Objective-C I must declare instance variables as part of the interface of my class even if these variables are implementation details and have private access. In "subjective" C, I can declare a variable in my .c file and it is not visible outside of that compilation unit. I can declare it in the corresponding .h file, and then anyone who links in that compilation unit can see the variable. I wonder if there is an equivalent choice in Objective-C, or if I must indeed declare every ivar in the .h for my class. Ari.

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• XML/SOAP attributes for a complextype in kSOAP

  - by Soumya

  Hi, I'm trying to parse a SOAP response that contains nested ComplexTypes using the kSOAP library on Android 2.1. <event att1="value1" att2="value2" att3="value3"> <tag2> ... </tag2> <tag3> ... </tag3> </event> I've implemented my own class Event that implements org.ksoap2.serialization.KvmSerializable to parse this response. It is not clear to me if and how I can parse the attributes (att1, att2 and att3) of the event node. Is it even possible with the current kSOAP implementation? Thanks.

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• Multiple skins in ASP.NET MVC using StringTemplate

  - by Jamie

  I am considering the StringTemplate view engine for my ASP.NET MVC application. This application will be built with one skin, but I then expect many more, often very similar skins to be developed for it. This is primiarly the reason for my choice of StringTemplate as the view engine, as there will be zero logic in the views. In my head, I envisaged having each skin in a directory under the 'Views' directory in the folder structure, then maintaining a data structure which maps hostnames to skin directories. An obvious disadvantage of this approach is that I will have to explicitly specify my view files - an alternative might be to hack the implementation of the View() method to change the /views/controller/action standard path and insert an extra layer. Is anyone aware of any examples of implementations along these lines using ASP.NET MVC and StringTemplate at present? Can anyone forsee any potential problems with my approach? Thanks in advance.

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• iPad Simulator WebView/Google Maps API Issue

  - by EagleOfToledo

  I've only recently updated XCode to 3.2.2 and started to play with the iPad simulator. I am having an issue with a WebView. I am using it to load a url with a Google Maps API implementation. The map loads and displays properly but when I try and click and drag on it to pan the map around instead of the map being panned the whole webview is scrolled vertically, revealing the dark grey background. When I release it it bounces back into place. Also when I hold the option key down to pinch the map it does not respond. If I load the map.google.com page the map pans just fine and is responsive, but not my one. No special code here, just the usual NSUrlRequest. It works fine in the iPhone simulator, but not the iPad simulator. User Interaction Enabled is also checked. Any thoughts on why this is happening?

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• willRotateToInterfaceOrientation:duration: not called for iOS5 after dismissing from modal

  - by Jean-Denis Muys

  My main UIViewController overrides willRotateToInterfaceOrientation:duration: to adapt the background view for the correct orientation. This works fine when staying within the view. But in my app, the result of some user actions can lead to presenting another "daughter" UIViewController. When the user is done with that daughter UIViewController, she normally returns to the main view controller. My code calls dismissModalViewControllerAnimated: to do so. The issue occurs when the user changes the iPad orientation while the daughter UIViewController is on screen. Then, the main UIViewController will never see any call to willRotateToInterfaceOrientation:duration: and its background view will be incorrect. This setup works fine in iOS 4: the iOS 4 implementation of dismissModalViewControllerAnimated: calls UIWindow's _setRotatableClient:toOrientation:updateStatusBar:duration:force: which calls willRotateToInterfaceOrientation:duration: for the switched in UIViewController. Apparently , this behavior changed for iOS 5. How am I expected to implemented orientation changes while my view is off screen under iOS5? Am I supposed to query the current orientation in viewWillAppear: for example?

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• Can you help me get my head around openssl public key encryption with rsa.h in c++?

  - by Ben

  Hi there, I am trying to get my head around public key encryption using the openssl implementation of rsa in C++. Can you help? So far these are my thoughts (please do correct if necessary) Alice is connected to Bob over a network Alice and Bob want secure communications Alice generates a public / private key pair and sends public key to Bob Bob receives public key and encrypts a randomly generated symmetric cypher key (e.g. blowfish) with the public key and sends the result to Alice Alice decrypts the ciphertext with the originally generated private key and obtains the symmetric blowfish key Alice and Bob now both have knowledge of symmetric blowfish key and can establish a secure communication channel Now, I have looked at the openssl/rsa.h rsa implementation (since I already have practical experience with openssl/blowfish.h), and I see these two functions: int RSA_public_encrypt(int flen, unsigned char *from, unsigned char *to, RSA *rsa, int padding); int RSA_private_decrypt(int flen, unsigned char *from, unsigned char *to, RSA *rsa, int padding); If Alice is to generate *rsa, how does this yield the rsa key pair? Is there something like rsa_public and rsa_private which are derived from rsa? Does *rsa contain both public and private key and the above function automatically strips out the necessary key depending on whether it requires the public or private part? Should two unique *rsa pointers be generated so that actually, we have the following: int RSA_public_encrypt(int flen, unsigned char *from, unsigned char *to, RSA *rsa_public, int padding); int RSA_private_decrypt(int flen, unsigned char *from, unsigned char *to, RSA *rsa_private, int padding); Secondly, in what format should the *rsa public key be sent to Bob? Must it be reinterpreted in to a character array and then sent the standard way? I've heard something about certificates -- are they anything to do with it? Sorry for all the questions, Best Wishes, Ben. EDIT: Coe I am currently employing: /* * theEncryptor.cpp * * * Created by ben on 14/01/2010. * Copyright 2010 __MyCompanyName__. All rights reserved. * */ #include "theEncryptor.h" #include <iostream> #include <sys/socket.h> #include <sstream> theEncryptor::theEncryptor() { } void theEncryptor::blowfish(unsigned char *data, int data_len, unsigned char* key, int enc) { // hash the key first! unsigned char obuf[20]; bzero(obuf,20); SHA1((const unsigned char*)key, 64, obuf); BF_KEY bfkey; int keySize = 16;//strlen((char*)key); BF_set_key(&bfkey, keySize, obuf); unsigned char ivec[16]; memset(ivec, 0, 16); unsigned char* out=(unsigned char*) malloc(data_len); bzero(out,data_len); int num = 0; BF_cfb64_encrypt(data, out, data_len, &bfkey, ivec, &num, enc); //for(int i = 0;i<data_len;i++)data[i]=out[i]; memcpy(data, out, data_len); free(out); } void theEncryptor::generateRSAKeyPair(int bits) { rsa = RSA_generate_key(bits, 65537, NULL, NULL); } int theEncryptor::publicEncrypt(unsigned char* data, unsigned char* dataEncrypted,int dataLen) { return RSA_public_encrypt(dataLen, data, dataEncrypted, rsa, RSA_PKCS1_OAEP_PADDING); } int theEncryptor::privateDecrypt(unsigned char* dataEncrypted, unsigned char* dataDecrypted) { return RSA_private_decrypt(RSA_size(rsa), dataEncrypted, dataDecrypted, rsa, RSA_PKCS1_OAEP_PADDING); } void theEncryptor::receivePublicKeyAndSetRSA(int sock, int bits) { int max_hex_size = (bits / 4) + 1; char keybufA[max_hex_size]; bzero(keybufA,max_hex_size); char keybufB[max_hex_size]; bzero(keybufB,max_hex_size); int n = recv(sock,keybufA,max_hex_size,0); n = send(sock,"OK",2,0); n = recv(sock,keybufB,max_hex_size,0); n = send(sock,"OK",2,0); rsa = RSA_new(); BN_hex2bn(&rsa->n, keybufA); BN_hex2bn(&rsa->e, keybufB); } void theEncryptor::transmitPublicKey(int sock, int bits) { const int max_hex_size = (bits / 4) + 1; long size = max_hex_size; char keyBufferA[size]; char keyBufferB[size]; bzero(keyBufferA,size); bzero(keyBufferB,size); sprintf(keyBufferA,"%s\r\n",BN_bn2hex(rsa->n)); sprintf(keyBufferB,"%s\r\n",BN_bn2hex(rsa->e)); int n = send(sock,keyBufferA,size,0); char recBuf[2]; n = recv(sock,recBuf,2,0); n = send(sock,keyBufferB,size,0); n = recv(sock,recBuf,2,0); } void theEncryptor::generateRandomBlowfishKey(unsigned char* key, int bytes) { /* srand( (unsigned)time( NULL ) ); std::ostringstream stm; for(int i = 0;i<bytes;i++){ int randomValue = 65 + rand()% 26; stm << (char)((int)randomValue); } std::string str(stm.str()); const char* strs = str.c_str(); for(int i = 0;bytes;i++)key[i]=strs[i]; */ int n = RAND_bytes(key, bytes); if(n==0)std::cout<<"Warning key was generated with bad entropy. You should not consider communication to be secure"<<std::endl; } theEncryptor::~theEncryptor(){}

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• ERR_INCOMPLETE_CHUNKED_ENCODING apache 2.4

  - by Bujanca Mihai

  I upgraded my Ubuntu server to 14.04 and Apache 2.4.7. Now my images don't load and console yields net::ERR_INCOMPLETE_CHUNKED_ENCODING. Also, I can sometimes see some of the images load for a little while (1 sec max) and then they disappear. .htaccess RewriteEngine On # Serve the favicon file from img folder RewriteCond %{REQUEST_URI} ^/favicon.ico$ RewriteRule ^(.*)$ /img/$1 [NC,L] # Redirect HTTP traffic to WWW subdomain RewriteCond %{HTTPS} off [NC] RewriteCond %{HTTP_HOST} !^www\. [NC] RewriteRule ^(.*)$ http://www.%{HTTP_HOST}/$1 [R=301,L] # Redirect HTTPS traffic to WWW subdomain RewriteCond %{HTTPS} on [NC] RewriteCond %{HTTP_HOST} !^www\. [NC] RewriteRule ^(.*)$ https://www.%{HTTP_HOST}/$1 [R=301,L] # Auto Versioning rules RewriteCond %{REQUEST_FILENAME} !-s RewriteRule ^(.*)\.[\d]+\.(css|js)$ $1.$2 [L] # Default Zend rewrite rules RewriteCond %{REQUEST_FILENAME} -s [OR] RewriteCond %{REQUEST_FILENAME} -l [OR] RewriteCond %{REQUEST_FILENAME} -d RewriteRule ^.*$ - [NC,L] RewriteRule ^.*$ index.php [NC,L] VHost <VirtualHost *:80> ServerAdmin admin@localhost ServerName localhost DocumentRoot /home/mihai/ARTD/www/public/website # Omit this in production environment SetEnv APPLICATION_ENV local <Directory /home/mihai/ARTD/www/public/website > Options Indexes FollowSymLinks MultiViews AllowOverride All #Order deny,allow #Allow from all Require all granted </Directory> <IfModule mod_php5.c> php_value memory_limit 128M php_value upload_max_filesize 20M php_value post_max_size 20M </IfModule> ErrorLog /var/log/apache2/ARTD-error.log # Possible values include: debug, info, notice, warn, error, crit, # alert, emerg. LogLevel warn CustomLog /var/log/apache2/ARTD-access.log combined </VirtualHost> <IfModule mod_ssl.c> <VirtualHost *:443> ServerAdmin admin@localhost ServerName localhost DocumentRoot /home/mihai/ARTD/www/public/website # Omit this in production environment SetEnv APPLICATION_ENV local <Directory /home/mihai/ARTD/www/public/website > Options Indexes FollowSymLinks MultiViews AllowOverride All #Order deny,allow #Allow from all Require all granted </Directory> <IfModule mod_php5.c> php_value memory_limit 128M php_value upload_max_filesize 20M php_value post_max_size 20M </IfModule> ErrorLog /var/log/apache2/ARTD-ssl-error.log # Possible values include: debug, info, notice, warn, error, crit, # alert, emerg. LogLevel warn CustomLog /var/log/apache2/ARTD.log combined # SSL Engine Switch: # Enable/Disable SSL for this virtual host. SSLEngine on # A self-signed (snakeoil) certificate can be created by installing # the ssl-cert package. See # /usr/share/doc/apache2.2-common/README.Debian.gz for more info. # If both key and certificate are stored in the same file, only the # SSLCertificateFile directive is needed. SSLCertificateFile /etc/ssl/certs/ssl-cert-snakeoil.pem SSLCertificateKeyFile /etc/ssl/private/ssl-cert-snakeoil.key # Server Certificate Chain: # Point SSLCertificateChainFile at a file containing the # concatenation of PEM encoded CA certificates which form the # certificate chain for the server certificate. Alternatively # the referenced file can be the same as SSLCertificateFile # when the CA certificates are directly appended to the server # certificate for convinience. #SSLCertificateChainFile /etc/apache2/ssl.crt/server-ca.crt # Certificate Authority (CA): # Set the CA certificate verification path where to find CA # certificates for client authentication or alternatively one # huge file containing all of them (file must be PEM encoded) # Note: Inside SSLCACertificatePath you need hash symlinks # to point to the certificate files. Use the provided # Makefile to update the hash symlinks after changes. #SSLCACertificatePath /etc/ssl/certs/ #SSLCACertificateFile /etc/apache2/ssl.crt/ca-bundle.crt # Certificate Revocation Lists (CRL): # Set the CA revocation path where to find CA CRLs for client # authentication or alternatively one huge file containing all # of them (file must be PEM encoded) # Note: Inside SSLCARevocationPath you need hash symlinks # to point to the certificate files. Use the provided # Makefile to update the hash symlinks after changes. #SSLCARevocationPath /etc/apache2/ssl.crl/ #SSLCARevocationFile /etc/apache2/ssl.crl/ca-bundle.crl # Client Authentication (Type): # Client certificate verification type and depth. Types are # none, optional, require and optional_no_ca. Depth is a # number which specifies how deeply to verify the certificate # issuer chain before deciding the certificate is not valid. #SSLVerifyClient require #SSLVerifyDepth 10 # Access Control: # With SSLRequire you can do per-directory access control based # on arbitrary complex boolean expressions containing server # variable checks and other lookup directives. The syntax is a # mixture between C and Perl. See the mod_ssl documentation # for more details. #<Location /> #SSLRequire ( %{SSL_CIPHER} !~ m/^(EXP|NULL)/ \ # and %{SSL_CLIENT_S_DN_O} eq "Snake Oil, Ltd." \ # and %{SSL_CLIENT_S_DN_OU} in {"Staff", "CA", "Dev"} \ # and %{TIME_WDAY} >= 1 and %{TIME_WDAY} <= 5 \ # and %{TIME_HOUR} >= 8 and %{TIME_HOUR} <= 20 ) \ # or %{REMOTE_ADDR} =~ m/^192\.76\.162\.[0-9]+$/ #</Location> # SSL Engine Options: # Set various options for the SSL engine. # o FakeBasicAuth: # Translate the client X.509 into a Basic Authorisation. This means that # the standard Auth/DBMAuth methods can be used for access control. The # user name is the `one line' version of the client's X.509 certificate. # Note that no password is obtained from the user. Every entry in the user # file needs this password: `xxj31ZMTZzkVA'. # o ExportCertData: # This exports two additional environment variables: SSL_CLIENT_CERT and # SSL_SERVER_CERT. These contain the PEM-encoded certificates of the # server (always existing) and the client (only existing when client # authentication is used). This can be used to import the certificates # into CGI scripts. # o StdEnvVars: # This exports the standard SSL/TLS related `SSL_*' environment variables. # Per default this exportation is switched off for performance reasons, # because the extraction step is an expensive operation and is usually # useless for serving static content. So one usually enables the # exportation for CGI and SSI requests only. # o StrictRequire: # This denies access when "SSLRequireSSL" or "SSLRequire" applied even # under a "Satisfy any" situation, i.e. when it applies access is denied # and no other module can change it. # o OptRenegotiate: # This enables optimized SSL connection renegotiation handling when SSL # directives are used in per-directory context. #SSLOptions +FakeBasicAuth +ExportCertData +StrictRequire #<FilesMatch "\.(cgi|shtml|phtml|php)$"> # SSLOptions +StdEnvVars #</FilesMatch> # SSL Protocol Adjustments: # The safe and default but still SSL/TLS standard compliant shutdown # approach is that mod_ssl sends the close notify alert but doesn't wait for # the close notify alert from client. When you need a different shutdown # approach you can use one of the following variables: # o ssl-unclean-shutdown: # This forces an unclean shutdown when the connection is closed, i.e. no # SSL close notify alert is send or allowed to received. This violates # the SSL/TLS standard but is needed for some brain-dead browsers. Use # this when you receive I/O errors because of the standard approach where # mod_ssl sends the close notify alert. # o ssl-accurate-shutdown: # This forces an accurate shutdown when the connection is closed, i.e. a # SSL close notify alert is send and mod_ssl waits for the close notify # alert of the client. This is 100% SSL/TLS standard compliant, but in # practice often causes hanging connections with brain-dead browsers. Use # this only for browsers where you know that their SSL implementation # works correctly. # Notice: Most problems of broken clients are also related to the HTTP # keep-alive facility, so you usually additionally want to disable # keep-alive for those clients, too. Use variable "nokeepalive" for this. # Similarly, one has to force some clients to use HTTP/1.0 to workaround # their broken HTTP/1.1 implementation. Use variables "downgrade-1.0" and # "force-response-1.0" for this. #BrowserMatch ".*MSIE.*" \ # nokeepalive ssl-unclean-shutdown \ # downgrade-1.0 force-response-1.0 </VirtualHost> </IfModule> logs Apache/2.4.7 (Ubuntu) PHP/5.5.9-1ubuntu4.3 OpenSSL/1.0.1f (internal dummy connection) 127.0.0.1 - - [25/Aug/2014:13:09:53 +0300] "GET /img/header/top-nav-separator.png HTTP/1.1" 200 462 "https://localhost/art" "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/34.0.1847.132 Safari/537.36"

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• Resolving IEnumerable<T> with Unity

  - by Mark Seemann

  Can Unity automatically resolve IEnumerable<T>? Let's say I have a class with this constructor: public CoalescingParserSelector(IEnumerable<IParserBuilder> parserBuilders) and I configure individual IParserBuilder instances in the container: container.RegisterType<IParserSelector, CoalescingParserSelector>(); container.RegisterType<IParserBuilder, HelpParserBuilder>(); container.RegisterType<IParserBuilder, SomeOtherParserBuilder>(); can I make this work without having to implement a custom implementation of IEnumerable<IParserBuilder>? var selector = container.Resolve<IParserSelector>(); So far I haven't been able to express this in any simple way, but I'm still ramping up on Unity so I may have missed something.

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• License Check before executing

  - by jaklucky

  Hi, We have an application (written in C# on .NET Framework 3.5) that is licensed using our custom licensing mechanism. In the current implementation, in each method we first check for if the machine has valid license or not. To me, it is little bit awkward. Is there any way to let the runtime check for the license before creating the object or excuting a method? Will writing a custom attribute solves this problem? Any ideas or solutions are greatly appreciated. Thank you, Suresh

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• Adding video and flash functionality to the Ajax Control Toolkit HTMLEditor

  - by Beerdude26

  Greetings, I'm looking for a way to extend the functionality of the HTMLEditor control that the Ajax Control Toolkit supplies for ASP.net. I would like to add video and flash functionality to the editor (buttons, allowed tags, etc). To my knowledge, this is rather easy: plop in an tag with the correct parameters and it just works; I have videos running in the preview window of the editor. Unfortunately, the tag is stripped away when saving the HTML-code and updating it in the database. Hence, I would like to ask if there is any way of adding this functionality apart from manually adding the changes in the source control repository of the Ajax Control Toolkit and recompiling it. If this is not possible, but can offer some help concerning the implementation of this in the source code, it would also be much appreciated. Thank you for your time :)

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• .Net Custom Configuration Section and Saving Changes within PropertyGrid

  - by Paul

  If I load the My.Settings object (app.config) into a PropertyGrid, I am able to edit the property inside the propertygrid and the change is automatically saved. PropertyGrid1.SelectedObject = My.Settings I want to do the same with a Custom Configuration Section. Following this code example (from here http://www.codeproject.com/KB/vb/SerializePropertyGrid.aspx), he is doing explicit serialization to disk when a "Save" button is pushed. Public Class Form1 'Load AppSettings Dim _appSettings As New AppSettings() Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click _appSettings = AppSettings.Load() ' Actually change the form size Me.Size = _appSettings.WindowSize PropertyGrid1.SelectedObject = _appSettings End Sub Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click _appSettings.Save() End Sub End Class In my code, my custom section Inherits from ConfigurationSection (see below) Question: Is there something built into ConfigurationSection class that does the autosave? If not, what is the best way to handle this, should it be in the PropertyGrid.PropertyValueChagned? (how does the My.Settings handle this internally?) Here is the example Custom Class that I am trying to get to auto-save and how I load into property grid. Dim config As System.Configuration.Configuration = _ ConfigurationManager.OpenExeConfiguration( _ ConfigurationUserLevel.None) PropertyGrid2.SelectedObject = config.GetSection("CustomSection") Public NotInheritable Class CustomSection Inherits ConfigurationSection ' The collection (property bag) that contains ' the section properties. Private Shared _Properties As ConfigurationPropertyCollection ' The FileName property. Private Shared _FileName As New ConfigurationProperty("fileName", GetType(String), "def.txt", ConfigurationPropertyOptions.IsRequired) ' The MasUsers property. Private Shared _MaxUsers _ As New ConfigurationProperty("maxUsers", _ GetType(Int32), 1000, _ ConfigurationPropertyOptions.None) ' The MaxIdleTime property. Private Shared _MaxIdleTime _ As New ConfigurationProperty("maxIdleTime", _ GetType(TimeSpan), TimeSpan.FromMinutes(5), _ ConfigurationPropertyOptions.IsRequired) ' CustomSection constructor. Public Sub New() _Properties = New ConfigurationPropertyCollection() _Properties.Add(_FileName) _Properties.Add(_MaxUsers) _Properties.Add(_MaxIdleTime) End Sub 'New ' This is a key customization. ' It returns the initialized property bag. Protected Overrides ReadOnly Property Properties() _ As ConfigurationPropertyCollection Get Return _Properties End Get End Property <StringValidator( _ InvalidCharacters:=" ~!@#$%^&*()[]{}/;'""|\", _ MinLength:=1, MaxLength:=60)> _ <EditorAttribute(GetType(System.Windows.Forms.Design.FileNameEditor), GetType(System.Drawing.Design.UITypeEditor))> _ Public Property FileName() As String Get Return CStr(Me("fileName")) End Get Set(ByVal value As String) Me("fileName") = value End Set End Property <LongValidator(MinValue:=1, _ MaxValue:=1000000, ExcludeRange:=False)> _ Public Property MaxUsers() As Int32 Get Return Fix(Me("maxUsers")) End Get Set(ByVal value As Int32) Me("maxUsers") = value End Set End Property <TimeSpanValidator(MinValueString:="0:0:30", _ MaxValueString:="5:00:0", ExcludeRange:=False)> _ Public Property MaxIdleTime() As TimeSpan Get Return CType(Me("maxIdleTime"), TimeSpan) End Get Set(ByVal value As TimeSpan) Me("maxIdleTime") = value End Set End Property End Class 'CustomSection

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• How to create Python module distribution to gracefully fall-back to pure Python code

  - by Craig McQueen

  I have written a Python module, and I have two versions: a pure Python implementation and a C extension. I've written the __init__.py file so that it tries to import the C extension, and if that fails, it imports the pure Python code (is that reasonable?). Now, I'd like to know what is the best way to distribute this module (e.g. write setup.py) so it can be easily used by people with or without the facility to build, or use, the C extension, just by running: python setup.py install My experience is limited, but I see two possible cases: User does not have MS Visual Studio, or the GCC compiler suite, installed on their machine, to build the C extension User is running IronPython, Jython, or anything other than CPython. I only have used CPython. So I'm not sure how I could distribute this module so that it would work smoothly and be easy to install on those platforms, if they're unable to use the C extension.

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• How to create Python module distribution to gracefully fall-back to pure Python code

  - by Craig McQueen

  I have written a Python module, and I have two versions: a pure Python implementation and a C extension. I've written the __init__.py file so that it tries to import the C extension, and if that fails, it imports the pure Python code (is that reasonable?). Now, I'd like to know what is the best way to distribute this module (e.g. write setup.py) so it can be easily used by people with or without the facility to build, or use, the C extension. My experience is limited but I see two possible cases: User does not have MS Visual Studio, or the GCC compiler suite, installed on their machine, to build the C extension User is running IronPython, Jython, or anything other than CPython. I only have used CPython. So I'm not sure how I could distribute this module so that it would work smoothly and be easy to install on those platforms, if they're unable to use the C extension.

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