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  • How do you Access an Authenticated Google App Engine Service with Ruby?

    - by viatropos
    I am trying to do this same thing here but with Ruby: Access Authenticated GAE Client with Python. Any ideas how to retrieve authenticated content from GAE with Ruby? I am using the Ruby GData Gem to access everything in Google Docs and such and it's making life very easy, but now I'd like to access things on GAE that require admin access, programmatically, and it doesn't support that. Here's what I'm getting (using DocList, not sure what to use yet): c = GData::Client::DocList.new c.clientlogin(username, password, nil, nil, nil, "HOSTED") c => #<GData::Client::DocList:0x201bad8 @clientlogin_service="writely", @version="2", @auth_handler=#<GData::Auth::ClientLogin:0x200803c @account_type="HOSTED", @token="long-hash", @auth_url="https://www.google.com/accounts/ClientLogin", @service="writely">, @source="AnonymousApp", @headers={"Authorization"=>"GoogleLogin auth=long-hash", "User-Agent"=>"GoogleDataRubyUtil-AnonymousApp", "GData-Version"=>"2", "Content-Type"=>"application/atom+xml"}, @authsub_scope="http://docs.google.com/feeds/", @http_service=GData::HTTP::DefaultService> url = "http://my-cdn.appspot.com/files/restricted-file.html" c.get(url) => #<GData::HTTP::Response:0x20004b8 @status_code=302, @body="", @headers={"connection"=>"close", "date"=>"Sun, 11 Apr 2010 00:30:20 GMT", "content-type"=>"text/html", "server"=>"Google Frontend", "content-length"=>"0", "location"=>"https://www.google.com/accounts/ServiceLogin service=ah&continue=http://my-cdn.appspot.com/_ah/login%3Fcontinue%3D http://my-cdn.appspot.com/files/restricted-file.html& ltmpl=gm&ahname=My+CDN&sig=a-signature"}> Any tips? That other SO question pointed to doing something with the redirect... Not sure how to handle that. Just looking for a point in the right direction from the ruby experts. Thanks.

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  • jquery newbie: combine validate with hidding submit button.

    - by Jeffb
    I'm new a jQuery. I have gotten validate to work with my form (MVC 1.0 / C#) with this: <script type="text/javascript"> if (document.forms.length > 0) { document.forms[0].id = "PageForm"; document.forms[0].name = "PageForm"; } $(document).ready(function() { $("#PageForm").validate({ rules: { SigP: { required: true } }, messages: { SigP: "<font color='red'><b>A Sig Value is required. </b></font>" } }); }); </script> I also want to hide the Submit button to prevent twitchy mouse syndrome from causing duplicate entry before the controller completes and redirects (I'm using an GPR pattern). The following works for this purpose: <script type="text/javascript"> // // prevent double-click on submit // jQuery('input[type=submit]').click(function() { if (jQuery.data(this, 'clicked')) { return false; } else { jQuery.data(this, 'clicked', true); return true; } }); </script> However, I can't get the two to work together. Specifically, if validate fails after the Submit button is clicked (which happens given how the form works), then I can't get the form submitted again unless I do a browser refresh that resets the 'clicked' property. How can I rewrite the second method above to not set the clicked property unless the form validates? Thx.

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  • open source business intelligence solutions

    - by opensas
    which open source business intelligence solution would you recommend? All I need is to build some cubes and let the end user play with dimensions, filter data, sort, etc, and once it's done being able to export it to excel... I'd like the solution to be as simple and easy on resources as possible, and also I'd like it to be as much open source as possible, by the way. I've heard that many solutions available do have many restrictions when it comes to there community version. I'd like to ear your advices and the pros/cons of each alternative, to help me choose the right tool, and if you could point me to some basic demo and tutorial to get started. thanks a lot ps: I'm using sql server databases, they aren't huge databases (in general less than a million records) and I doesn't necessarily have to work on "live" data... ps: some useful links: http://en.wikipedia.org/wiki/Business_intelligence_tools#Open_source_free_products http://www.manageability.org/blog/stuff/open-source-java-business-intelligence http://www.jaspersoft.com/jasperanalysis http://community.pentaho.com/projects/bi_platform/ http://community.pentaho.com/faq/platform_licensing.php http://www.eclipse.org/birt/phoenix/ http://www.spagoworld.org/xwiki/bin/view/SpagoWorld/ http://docs.google.com/viewer?a=v&q=cache:vhsqMQXwCUkJ:www.ow2.org/xwiki/bin/download/Activities/EuropeLocalChapterWebinars/ELCWebinarOSBI.pdf+open+source+business+intelligence&hl=en&pid=bl&srcid=ADGEESgpJJ2MqaKprJQOF2jX2UXCZQjg_asv8d7EVYtq0Vma-e-tR1tFxS-I0SOW0IhJC5acYc94rkDOrgP1WckCp_vk4qhKqR9y2Klp_u9cL8hlXoKoUpMkpAd5wabu61A4W0y15E5P&sig=AHIEtbRJ5FAI-3YK-qtayPjKkF_CwOgZag

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  • Perl: Process Communcation

    - by Shiftbit
    Can anyone explain how I can successfully get my process communicating. I find the perldoc on IPC confusing. What I have so far is: $| = 1; $SIG{CHLD} = {wait}; my $parentPid = $$; if ($pid = fork();) ) { if ($pid == 0) { pipe($parentPid, $$); open PARENT, "<$parentPid"; while (<PARENT>) { print $_; } close PARENT; exit(); } else { pipe($parentPid, $pid); open CHILD, ">$pid"; or error("\nError opening: childPid\nRef: $!\n"); open (FH, "<list") or error("\nError opening: list\nRef: $!\n"); while(<FH>) { print CHILD, $_; } close FH or error("\nError closing: list\nRef: $!\n"); close CHILD or error("\nError closing: childPid\nRef: $!\n); } else { error("\nError forking\nRef: $!\n"); } First Question is what does Perldoc pipe mean by READHANDLE, WRITEHANDLE? Second Questions is can I implement a solution without relying on CPAN or other modules?

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  • upload photo at facebook via iphone

    - by yunas
    hello i am trying to upload my image from myapplication but not able to do so.... i have tried ASIFormDataRequest *theRequest = [ASIFormDataRequest requestWithURL:url]; NSString *nowTimestamp = [NSString stringWithFormat:@"%f",[[NSDate date] timeIntervalSince1970]]; [theRequest setPostValue:kApiKey forKey:@"api_key"]; [theRequest setPostValue:(float)[[NSDate date] timeIntervalSince1970] forKey:@"call_id"]; [theRequest setPostValue:@"1.0" forKey:@"v"]; [theRequest setData:[NSString stringWithString:@"abc"] forKey:@"status"]; [theRequest setPostValue:[NSString stringWithFormat:@"%lld",session1.uid] forKey:@"uid"]; NSLog(@"%lld",session1.uid); NSString *strSig = [[NSString alloc] init]; strSig = [strSig stringByAppendingString:[NSString stringWithFormat:@"@=%@",@"api_key",kApiKey]]; StrSig = [strSig stringByAppendingString:[NSString stringWithFormat:@"@=%@",@"call_id",nowTimestamp]]; strSig = [strSig stringByAppendingString:[NSString stringWithFormat:@"%@=%@",@"v",@"1.0"]]; strSig = [strSig stringByAppendingString:[NSString stringWithFormat:@"%@=%@",@"uid",[NSString stringWithFormat:@"%lld",session1.uid]]]; strSig = [strSig stringByAppendingString:kApiSecret]; [theRequest setPostValue:[self md5:strSig] forKey:@"sig"]; [theRequest setURL:url]; [theRequest setRequestMethod:@"POST"]; [theRequest setPostFormat:ASIMultipartFormDataPostFormat]; [theRequest startSynchronous]; but it says that signature is incorrect .... where i am wrong please help me.....

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  • How to verify the SSL connection when calling an URI?

    - by robertokl
    Hello, I am developing an web application that is authenticated using CAS (A single-sign-on solution: http://www.ja-sig.org/wiki/display/CAS/Home). For security reasons, I need two things to work: The communication between CAS and my application needs to be secure My application needs to accept the certification coming with CAS, so that I can guarantee that the CAS responding is the real CAS Server. This is what I got so far: uri = URI.parse("https://www.google.com/accounts") https = Net::HTTP.new(uri.host, uri.port) https.use_ssl = (uri.scheme == 'https') https.verify_mode = (OpenSSL::SSL::VERIFY_PEER) raw_res = https.start do |conn| conn.get("#{uri.path}?#{uri.query}") end This works just great in my Mac OSX. When I try to reach an insecure uri, it raises an exception, and when I try to reach a secure uri, it allow me normally, just like expected. The problem starts when I deploy my application on my Linux server. I tried in both Ubuntu and Red Hat. Independing of what uri I try to reach, it always raises me this exception: OpenSSL::SSL::SSLError: SSL_connect returned=1 errno=0 state=SSLv3 read server certificate B: certificate verify failed from /usr/local/lib/ruby/1.8/net/http.rb:586:in `connect' from /usr/local/lib/ruby/1.8/net/http.rb:586:in `connect' from /usr/local/lib/ruby/1.8/net/http.rb:553:in `do_start' from /usr/local/lib/ruby/1.8/net/http.rb:542:in `start' from (irb):7 I think this have something to do with my installed OpenSSL package, but I can't be sure. This are my installed OpenSSL packages: openssl.x86_64 0.9.8e-12.el5 installed openssl-devel.x86_64 0.9.8e-12.el5 installed I tried using HTTParty as well, but it just ignores the SSL certificated. I hope someone can help me, either by telling me a gem that works the way I need. Thanks.

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  • DSA signature verification input

    - by calccrypto
    What is the data inputted into DSA when PGP signs a message? From RFC4880, i found A Signature packet describes a binding between some public key and some data. The most common signatures are a signature of a file or a block of text, and a signature that is a certification of a User ID. im not sure if it is the entire public key, just the public key packet, or some other derivative of a pgp key packet. whatever it is, i cannot get the DSA signature to verify here is a sample im testing my program on: -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 abcd -----BEGIN PGP SIGNATURE----- Version: BCPG v1.39 iFkEARECABkFAk0z65ESHGFiYyAodGVzdCBrZXkpIDw+AAoJEC3Jkh8+bnkusO0A oKG+HPF2Qrsth2zS9pK+eSCBSypOAKDBgC2Z0vf2EgLiiNMk8Bxpq68NkQ== =gq0e -----END PGP SIGNATURE----- Dumped from pgpdump.net Old: Signature Packet(tag 2)(89 bytes) Ver 4 - new Sig type - Signature of a canonical text document(0x01). Pub alg - DSA Digital Signature Algorithm(pub 17) Hash alg - SHA1(hash 2) Hashed Sub: signature creation time(sub 2)(4 bytes) Time - Mon Jan 17 07:11:13 UTC 2011 Hashed Sub: signer's User ID(sub 28)(17 bytes) User ID - abc (test key) <> Sub: issuer key ID(sub 16)(8 bytes) Key ID - 0x2DC9921F3E6E792E Hash left 2 bytes - b0 ed DSA r(160 bits) - a1 be 1c f1 76 42 bb 2d 87 6c d2 f6 92 be 79 20 81 4b 2a 4e DSA s(160 bits) - c1 80 2d 99 d2 f7 f6 12 02 e2 88 d3 24 f0 1c 69 ab af 0d 91 -> hash(DSA q bits) and the public key for it is: -----BEGIN PGP PUBLIC KEY BLOCK----- Version: BCPG v1.39 mOIETTPqeBECALx+i9PIc4MB2DYXeqsWUav2cUtMU1N0inmFHSF/2x0d9IWEpVzE kRc30PvmEHI1faQit7NepnHkkphrXLAoZukAoNP3PB8NRQ6lRF6/6e8siUgJtmPL Af9IZOv4PI51gg6ICLKzNO9i3bcUx4yeG2vjMOUAvsLkhSTWob0RxWppo6Pn6MOg dMQHIM5sDH0xGN0dOezzt/imAf9St2B0HQXVfAAbveXBeRoO7jj/qcGx6hWmsKUr BVzdQhBk7Sku6C2KlMtkbtzd1fj8DtnrT8XOPKGp7/Y7ASzRtBFhYmMgKHRlc3Qg a2V5KSA8PohGBBMRAgAGBQJNM+p5AAoJEC3Jkh8+bnkuNEoAnj2QnqGtdlTgUXCQ Fyvwk5wiLGPfAJ4jTGTL62nWzsgrCDIMIfEG2shm8bjMBE0z6ngQAgCUlP7AlfO4 XuKGVCs4NvyBpd0KA0m0wjndOHRNSIz44x24vLfTO0GrueWjPMqRRLHO8zLJS/BX O/BHo6ypjN87Af0VPV1hcq20MEW2iujh3hBwthNwBWhtKdPXOndJGZaB7lshLJuW v9z6WyDNXj/SBEiV1gnPm0ELeg8Syhy5pCjMAgCFEc+NkCzcUOJkVpgLpk+VLwrJ /Wi9q+yCihaJ4EEFt/7vzqmrooXWz2vMugD1C+llN6HkCHTnuMH07/E/2dzciEYE GBECAAYFAk0z6nkACgkQLcmSHz5ueS7NTwCdED1P9NhgR2LqwyS+AEyqlQ0d5joA oK9xPUzjg4FlB+1QTHoOhuokxxyN =CTgL -----END PGP PUBLIC KEY BLOCK----- the public key packet of the key is mOIETTPqeBECALx+i9PIc4MB2DYXeqsWUav2cUtMU1N0inmFHSF/2x0d9IWEpVzEkRc30PvmEHI1faQi t7NepnHkkphrXLAoZukAoNP3PB8NRQ6lRF6/6e8siUgJtmPLAf9IZOv4PI51gg6ICLKzNO9i3bcUx4ye G2vjMOUAvsLkhSTWob0RxWppo6Pn6MOgdMQHIM5sDH0xGN0dOezzt/imAf9St2B0HQXVfAAbveXBeRoO 7jj/qcGx6hWmsKUrBVzdQhBk7Sku6C2KlMtkbtzd1fj8DtnrT8XOPKGp7/Y7ASzR in radix 64 i have tried many different combinations of sha1(< some data + 'abcd'),but the calculated value v never equals r, of the signature i know that the pgp implementation i used to create the key and signature is correct. i also know that my DSA implementation and PGP key data extraction program are correct. thus, the only thing left is the data to hash. what is the correct data to be hashed?

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  • How to verify the SSL connection when calling a URI?

    - by robertokl
    Hello, I am developing a web application that is authenticated using CAS (A single-sign-on solution: http://www.ja-sig.org/wiki/display/CAS/Home). For security reasons, I need two things to work: The communication between CAS and my application needs to be secure My application needs to accept the certification coming from CAS, so that I can guarantee that the CAS responding is the real CAS server This is what I got so far: uri = URI.parse("https://www.google.com/accounts") https = Net::HTTP.new(uri.host, uri.port) https.use_ssl = (uri.scheme == 'https') https.verify_mode = (OpenSSL::SSL::VERIFY_PEER) raw_res = https.start do |conn| conn.get("#{uri.path}?#{uri.query}") end This works just great in Mac OS X. When I try to reach an insecure URI, it raises an exception, and when I try to reach a secure URI, it allows me normally, just like expected. The problem starts when I deploy my application on my Linux server. I tried in both Ubuntu and Red Hat. Independent of what URI I try to reach, it always raises this exception: OpenSSL::SSL::SSLError: SSL_connect returned=1 errno=0 state=SSLv3 read server certificate B: certificate verify failed from /usr/local/lib/ruby/1.8/net/http.rb:586:in `connect' from /usr/local/lib/ruby/1.8/net/http.rb:586:in `connect' from /usr/local/lib/ruby/1.8/net/http.rb:553:in `do_start' from /usr/local/lib/ruby/1.8/net/http.rb:542:in `start' from (irb):7 I think this have something to do with my installed OpenSSL package, but I can't be sure. This are my installed OpenSSL packages: openssl.x86_64 0.9.8e-12.el5 installed openssl-devel.x86_64 0.9.8e-12.el5 installed I tried using HTTParty as well, but it just ignores the SSL certificate. I hope someone can help me, or tell me about a gem that works the way I need. Thanks.

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  • Directly call distutils' or setuptools' setup() function with command name/options, without parsing

    - by Ryan B. Lynch
    I'd like to call Python's distutils' or setuptools' setup() function in a slightly unconventional way, but I'm not sure whether distutils is meant for this kind of usage. As an example, let's say I currently have a 'setup.py' file, which looks like this (lifted verbatim from the distutils docs--the setuptools usage is almost identical): from distutils.core import setup setup(name='Distutils', version='1.0', description='Python Distribution Utilities', author='Greg Ward', author_email='[email protected]', url='http://www.python.org/sigs/distutils-sig/', packages=['distutils', 'distutils.command'], ) Normally, to build just the .spec file for an RPM of this module, I could run python setup.py bdist_rpm --spec-only, which parses the command line and calls the 'bdist_rpm' code to handle the RPM-specific stuff. The .spec file ends up in './dist'. How can I change my setup() invocation so that it runs the 'bdist_rpm' command with the '--spec-only' option, WITHOUT parsing command-line parameters? Can I pass the command name and options as parameters to setup()? Or can I manually construct a command line, and pass that as a parameter, instead? NOTE: I already know that I could call the script in a separate process, with an actual command line, using os.system() or the subprocess module or something similar. I'm trying to avoid using any kind of external command invocations. I'm looking specifically for a solution that runs setup() in the current interpreter. For background, I'm converting some release-management shell scripts into a single Python program. One of the tasks is running 'setup.py' to generate a .spec file for further pre-release testing. Running 'setup.py' as an external command, with its own command line options, seems like an awkward method, and it complicates the rest of the program. I feel like there may be a more Pythonic way.

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  • Problems uploading pictures to Facebook wall.

    - by Miguel Ángel Ortuño
    Hi, i'm trying to upload a JPEG picture to Facebook wall using libcurl. Appareantly the connection is established but cURL hangs when waiting for server response. The libcurl output is the following: About to connect() to api.facebook.com port 80 (#0) Trying 66.220.146.15... * connected Connected to api.facebook.com (66.220.146.15) port 80 (#0) POST /restserver.php?api_key=e57addd5a98ac4445e36359043ded182&call_id=3&caption=ddfg&format=JSON&method=facebook.photos.upload&session_key=a3fc731e4c0329201606daeb-723233322&sig=a3f32226cff3e49ec799cf7dcc17a57e&ss=1&v=1.0?method=photos.upload HTTP/1.1 User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1.14) Gecko/20080404 Firefox/2.0.0.14 Host: api.facebook.com Accept: / Content-Type: multipart/form-data; charset=UTF-8; boundary=PPoSt_dElImTTer MIME-version: 1.0 Content-Length: 128033 Expect: 100-continue Done waiting for 100-continue And the C++ code is as follow: String post_header = "Content-Type: multipart/form-data; charset=UTF-8; boundary=PPoSt_dElImTTer\r\nMIME-version: 1.0\r\n"; // POST binary data curl_slist* chunk = NULL; chunk = curl_slist_append(chunk, post_header.c_str()); curl_easy_setopt(m_http, CURLOPT_HTTPHEADER, chunk); curl_easy_setopt(m_http, CURLOPT_POST, true); curl_easy_setopt(m_http, CURLOPT_POSTFIELDS, buf); curl_easy_setopt(m_http, CURLOPT_POSTFIELDSIZE, all_size); curl_easy_setopt(m_http, CURLOPT_URL, m_request.c_str()); curl_easy_setopt(m_http, CURLOPT_WRITEFUNCTION, Facebook::Request::httpCallback); curl_easy_setopt(m_http, CURLOPT_WRITEDATA, this); curl_easy_setopt(m_http, CURLOPT_USERAGENT, "Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1.14) Gecko/20080404 Firefox/2.0.0.14"); curl_easy_setopt(m_http, CURLOPT_VERBOSE, true);

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  • How can I use `pipe` to facilitate interprocess communication in Perl?

    - by Shiftbit
    Can anyone explain how I can successfully get my processes communicating? I find the perldoc on IPC confusing. What I have so far is: $| = 1; $SIG{CHLD} = {wait}; my $parentPid = $$; if ($pid = fork();) ) { if ($pid == 0) { pipe($parentPid, $$); open PARENT, "<$parentPid"; while (<PARENT>) { print $_; } close PARENT; exit(); } else { pipe($parentPid, $pid); open CHILD, ">$pid"; or error("\nError opening: childPid\nRef: $!\n"); open (FH, "<list") or error("\nError opening: list\nRef: $!\n"); while(<FH>) { print CHILD, $_; } close FH or error("\nError closing: list\nRef: $!\n"); close CHILD or error("\nError closing: childPid\nRef: $!\n); } else { error("\nError forking\nRef: $!\n"); } First: What does perldoc pipe mean by READHANDLE, WRITEHANDLE? Second: Can I implement a solution without relying on CPAN or other modules?

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  • Building a ctypes-"based" C library with distutils

    - by Robie Basak
    Following this recommendation, I have written a native C extension library to optimise part of a Python module via ctypes. I chose ctypes over writing a CPython-native library because it was quicker and easier (just a few functions with all tight loops inside). I've now hit a snag. If I want my work to be easily installable using distutils using python setup.py install, then distutils needs to be able to build my shared library and install it (presumably into /usr/lib/myproject). However, this not a Python extension module, and so as far as I can tell, distutils cannot do this. I've found a few references to people other people with this problem: Someone on numpy-discussion with a hack back in 2006. Somebody asking on distutils-sig and not getting an answer. Somebody asking on the main python list and being pointed to the innards of an existing project. I am aware that I can do something native and not use distutils for the shared library, or indeed use my distribution's packaging system. My concern is that this will limit usability as not everyone will be able to install it easily. So my question is: what is the current best way of distributing a shared library with distutils that will be used by ctypes but otherwise is OS-native and not a Python extension module? Feel free to answer with one of the hacks linked to above if you can expand on it and justify why that is the best way. If there is nothing better, at least all the information will be in one place.

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  • ncurses - resizing glitch

    - by ryyst
    I'm writing an ncurses program and am trying to make it respond correctly to terminal resizing. While I can read the terminal dimensions correctly in my program, ncurses doesn't seem to deal with new dimensions correctly. Here's a (somewhat lengthy) sample program: #include <ncurses.h> #include <string.h> #include <signal.h> #include <sys/ioctl.h> void handle_winch(int sig){ struct winsize w; ioctl(0, TIOCGWINSZ, &w); COLS = w.ws_col; LINES = w.ws_row; wresize(stdscr, LINES, COLS); clear(); mvprintw(0, 0, "COLS = %d, LINES = %d", COLS, LINES); for (int i = 0; i < COLS; i++) mvaddch(1, i, '*'); refresh(); } int main(int argc, char *argv[]){ initscr(); struct sigaction sa; memset(&sa, 0, sizeof(struct sigaction)); sa.sa_handler = handle_winch; sigaction(SIGWINCH, &sa, NULL); while(getch() != 27) {} endwin(); return 0; } If you run it, you can see that the terminal dimensions are correctly retrieved. But the second line, which is supposed to draw *-characters across the screen, doesn't work. Try resizing the window horizontally to make it larger, the line of *s will not get larger. What's the problem here? I'm aware that one can temporarily leave curses mode, but I'd prefer a cleaner solution. Thanks!

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  • PHP: json_decode dumping NULL, BOM not found

    - by SerEnder
    I've been trying to find out why this 'json_encode'd string isn't parsing out correctly, and came across previously answered questions that had the UTF BOM sequence that was throwing the error, but didn't help me here. Here's the code that isn't currently working: //Decode the notes attached to the sig $aNotes = json_decode($rule->getNotes(),true); $bom = pack("CCC",0xef,0xbb,0xbf); if(0 == strncmp($rule->getNotes(),$bom,3)) { print('BOM detected - json encoding in UTF-8<br/>'); } else { print('BOM NOT detected - json encoding correctly<br/>'); } print('rule->getNotes:<br/>' . $rule->getNotes() .'<br/>'); var_dump($aNotes); Which generates this result: BOM NOT detected - json encoding correctly rule->getNotes: [{"lDate":"Unknown","sAuthor":"Unknown","sNote":"This is a general purpose Russian spam rule that matches anything starting with 2, 3 or 4 hex digits followed by a domain name ending with .ru -RSK 2010-05-10"},{"lDate":"1295031463082","sAuthor":"Drew Thorstenson","sNote":"this is Ryan's ru rule"}] NULL I've run it through JSON Lint, which said it was valid, and An Online JSON Parser which parsed it correctly too. Any insight would be greatly appreciated.

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  • AJAX/JSONP Question. Access id denied using IE while requesting corss domain.

    - by Sisir
    Ok, Here we go. I have already searched the Stack for the answer i have found some useful info but i want to clear up some more things. I also search the net for the answer but no real help. I have worked with some api (yelp, ouside.in). In yelp i use to inject the script to head with the url request to the api with a callback funcion. I worked fine in all browsers. But while using outside.in api when i call the url the callback in not working. In yelp they have a url field can be used like that callback=callbackfuncion so the callback will automatically called. But in outside.in there is not such field available. Is there are any standard command for callback function which will work regardless of any server/api? I also tried a standard ajax request using jQuery $.ajax() function. It worked for my local pc for both IE and other browser but did not working in IE showing the error: access denied, other borwser seems ok. Firebug in my FF also don't notice any errors. Outside.in has an javascript example but it is too hard to me to understand github.com/outsidein/api-examples/tree/master/javascript/browser/ site i am working: http://citystir.com yelp: yelp.com outside.in: outside.in Techniqual info: i am using: wampserver in local, wordpress for hosting, Godaddy, apache for remote with linux. Codes: Using Jquery $.ajax url is like: "http://hyperlocal-api.outside.in/v1.1/states/Illinois/cities/chicago/stories?dev_key="+key+"&sig="+signeture+"&limit=3 function makeOutsideRequest(url){ $.ajax({ url: url, dataType: 'json', type: 'GET', success: function (data, status, xhr) { if (data == null) { alert("An error occurred connecting to " + url + ". Please ensure that the server is running and configured to allow cross-origin requests."); }else{ printHomeNews(data); } }, error: function (xhr, status, error) { alert("An error occurred - check the server log for a stack trace."); } }); } Thanks!

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  • Why my linux signal handler run only once

    - by Henry Fané
    #include <iostream> #include <signal.h> #include <fenv.h> #include <string.h> void signal_handler(int sig, siginfo_t *siginfo, void* context) { std::cout << " signal_handler " << fetestexcept(FE_ALL_EXCEPT) << std::endl; throw "exception"; } void divide() { float a = 1000., b = 0., c, f = 1e-300; c = a / b; std::cout << c << " and f = " << f << std::endl; } void init_sig_hanlder() { feenableexcept(FE_ALL_EXCEPT); struct sigaction sa, initial_sa; sa.sa_sigaction = &signal_handler ; sigemptyset( &sa.sa_mask ) ; sa.sa_flags = SA_SIGINFO; // man sigaction(3) // allows for void(*)(int,siginfo_t*,void*) handler sigaction(SIGFPE, &sa, &initial_sa); } int main(int argc, char** argv) { init_sig_hanlder(); while(true) { try { sleep(1); divide(); } catch(const char * a) { std::cout << "Exception in catch: " << a << std::endl; } catch(...) { std::cout << "Exception in ..." << std::endl; } } return 0; } Produce the following results on Linux/g++4.2: signal_handler 0 Exception in catch: exception inf and f = 0 inf and f = 0 inf and f = 0 inf and f = 0 So, signal handler is executed the first time but the next fp exception does not trigger the handler again. Where am I wrong ?

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  • Debugging Widget causes ANR

    - by Salv0
    I'm trying to debug an AppWidget but I incurred in a problem :D I placed a breakpoint on the top of the method: public void onReceive(Context context, Intent intent) { Log.v(TAG, "onReceive 1"); // BP on this line super.onReceive(context, intent); String action = intent.getAction(); // Checks on action and computations ... Log.v(TAG, "onReceive 2"); updateWidget(context); Log.v(TAG, "onReceive 3"); } The breakpoint stops the execution as expected but then the process dies. The problem is that the breakpoint ( I guess xD ) cause an ANR and the ActivityManager kills the process. That's the Log: 01-07 14:32:38.886: ERROR/ActivityManager(72): ANR in com.salvo.wifiwidget 01-07 14:32:38.886: INFO/Process(72): Sending signal. PID: 475 SIG: 9 ...... ...... 01-07 14:32:38.906: INFO/ActivityManager(72): Process com.salvo.wifiwidget (pid 475) has died. This cause the debug to stop. So the question is: there's a way to debug the widget without incurring in the ANR?? thanks in advance for the answers

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  • Email Tracking - By IP

    - by disasm
    I am trying to track an Email I received to see where it originated from (harmful scam Email). Here is the full header: Received-SPF: pass (domain of aol.com designates 205.188.109.203 as permitted sender) ZSwgeW91ciBpbmZvcm1hdGlvbiBoYXMgYmVlbiBhY2NlcHRlZCBhbmQgYXBw cm92ZWQgYnkgb3VyIFJlY3J1aXRpbmcgRGVwYXJ0bWVudC4gWU9VUiBGSVJT VCBBU1NJR05NRU5UIERFVEFJTFMuIFdlc3Rlcm4gVW5pb24gTW9uZXkgVHJh bnNmZXIgaGFkIHJlcG9ydHMgYWJvdXQgbGFwc2VzIGluIHRoZSBzZXJ2aWNl cyBvZiBzb21lIG9mIHRoZWlyIG91dGxldHMgYW5kIHNvbWUgbwEwAQEBAQN0 ZXh0L3BsYWluAwMwAgN0ZXh0L2h0bWwDAzIx X-YMailISG: HeDj35sWLDvNbQaO2B72kIm7hhiubE2qUysyBFo2m3GE4wsk FOs6uaYWwBVUBbL_ubGEs5Gitm1b86QFPuQYdS3g5s2f_uY3dyHhXh7DcBIB Ad4mJBzeRozs5.0s6vbqhsIEYlaKI4EDrsocJEbDbTUiUq2UyxZ7Ery8Iqow _sBVN0msHJvcI09KwmaXUteV_qCL7qFlj7WNSmdMM.wVUm3pyiWzw1VUZlyD nwoEzdEImQdwmJqoTM1YE8XU6BE8IkmUkh1Z8XkfLtHqmAsPi1_.Msbi8ubk QD71BcTABjb7ixELg5NfomsyZKVN.9G.TnuISlX5umByjS701ITyQ2PUYXai hoVCWg37bKWNR9MAWdogUK8PIV3MWPv5gdglNAKuPdS5Z7.01J39UGyH7R60 aIiIWdAsQ7_3VQBgIi9Seg2YM2j1U5g9QtdcJxBe0.1oigmj7G2sC9.YXNGX 3abQ1EcWVlJLuSuBbQ4Flpbe_Y3_ssz8nZIK2YjKy0U8WWe77vfnxdEBsknf w2OA_PAzHtuAAuxETnAOU_MeMIssgRAtihKC_26Au1LnKYCGPGADFBLaLNHF 30itI.kBvUjdvUfqV11dnGe50kFVzBGDMJFm8mXvb5WtIKq6qU1ZZmUroCew EgXjVZ.JKbux2KQmHh2zZbIJO3nOmLGkzuRczYiWCUNBDtmUZE6imuIQ4P6S RjusSbMITf2fIL_xe.qFCnW563sOdc4u.uXLDx.lq30740l8lWkkLX6KaDMF k9TY0VQKsMynqa4vXKpkTVNdukAcGd0p2i3newxY4q_9eZLn9czsJimfpKNW SX1bqjs0iCQHb4FTydf1Zpa2b.6lIhdjVlIM8tiWhfGhlUeM267T3njEM6nz 0vxyjparR_G_s0VnIVhSeLw2F5KpAL226w2yA.WBcqoG2ROSa7fK.0ZYwy36 Qcmk8C.HKj8Fng1qFLtEfaI4F66rCEJi7h1d6EK0Jk4a_TJnBBub1VQVoU.s SJ2ehs8aDjDqJw27_Ia4vYekKhIU8Oak0vYSmMXhZ5IvJfGfOHYVy4ebkoQf IDE3lSfex1nHZqcMqq0agPOZUOdznSIGJVx4T8m6MGwrEouvL.grhT6KUJQ5 g8UX6DVTgj.8lHuTyOzj3A3NRwDFs2JqicprOMJRS4UWYX8eQ1y4j.4ora36 LnWYm7k1n6X0lDBW5ZdZlsLy7.0al0G1uCIAZwBNo7FnHr6q2mQNwgFaPkNO FOiykqFHu0khLO_cZw87MpDslZO_3lFbJGlnchSs81hkESSQsldUxqdNkIV. yWsS58p1uuwVNksp4NB.QW41wfBtY5FU.Q80g8KiOZIz0daou3GlzoahcHoQ GPgSa86GKtSo.ew2xEUKk6c.ffAT9RjqNh5fzyhBdzEYURxJBYgMlL5DQp2G yYIGhlIS5h9JzPFVkk2XhBoY2NgEAAfJfAfqKoMNNKIW.bEwbgNa9xtSzHNg YdmDfOSkYkAGZDqwa.uONguq5.jqtnWDnx3GDyuoVg-- X-Originating-IP: [205.188.109.203] Authentication-Results: mta1343.mail.bf1.yahoo.com from=aol.com; domainkeys=neutral (no sig); from=mx.aol.com; dkim=pass (ok) Received: from 127.0.0.1 (EHLO omr-d06.mx.aol.com) (205.188.109.203) by mta1343.mail.bf1.yahoo.com with SMTP; Fri, 18 Oct 2013 10:11:15 -0700 Received: from mtaomg-da05.r1000.mx.aol.com (mtaomg-da05.r1000.mx.aol.com [172.29.51.141]) by omr-d06.mx.aol.com (Outbound Mail Relay) with ESMTP id ACFAD7012DFB4 for <.confidential.; Fri, 18 Oct 2013 13:11:15 -0400 (EDT) Received: from core-mfb002c.r1000.mail.aol.com (core-mfb002.r1000.mail.aol.com [172.29.47.199]) by mtaomg-da05.r1000.mx.aol.com (OMAG/Core Interface) with ESMTP id 2ADB6E000089 for <.confidential.; Fri, 18 Oct 2013 13:11:15 -0400 (EDT) References: <[email protected] <[email protected] <[email protected] To: .confidential. Subject:.confidential. In-Reply-To: <[email protected] X-MB-Message-Source: WebUI MIME-Version: 1.0 From: .confidential. X-MB-Message-Type: User Content-Type: multipart/alternative; boundary="--------MB_8D09A3C2FD3105D_1338_33A66_webmail-d257.sysops.aol.com" X-Mailer: AOL Webmail 38109-STANDARD Received: from 66.199.226.81 by webmail-d257.sysops.aol.com (205.188.17.42) with HTTP (WebMailUI); Fri, 18 Oct 2013 13:11:15 -0400 Message-Id: <[email protected] X-Originating-IP: [66.199.226.81] Date: Fri, 18 Oct 2013 13:11:15 -0400 (EDT) x-aol-global-disposition: G DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=mx.aol.com; s=20121107; t=1382116275; bh=9TXLF90L8beaMnjNzoKDwcv3Eq06jiZGN40YTBw2YOI=; h=From:To:Subject:Message-Id:Date:MIME-Version:Content-Type; b=xHVjoH5AccrOpPZoZZW+b41uJ7nzHDrryGsO6WzvtBOFGWX3xJMO3RB1ILFlJAsF6 P9olk8Gz6LDydX9SOZ4w/yPI8y8eU6z1AauwOPxw9F1lu82goIGwK3jIcvOv72koB5 Izq9By7L6PESEmmJ5nFc4ko9vH2CBMcJKPV95HTg= x-aol-sid: 3039ac1d338d52616bb37d53 Content-Length: 26445 The Email was from the aol domain, so I understand the IP of aol. My question is, looking at 66.199.226.81 , would it be safe to say that the Email originated from "Access Integrated Technologies"? Thanks for any help!

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  • Hidden DNS master only sending notify to one slave

    - by Rob
    My hidden DNS master is only sending notifies to one of the name servers for a zone I have 3 named servers ns0,ns1 & ns2 all running bind 9.7.3.dfsg-1ubuntu4.1. When an update is processed the master (ns0) seems to behave normally. ns0 (192.168.2.50) zone domain.org/IN: sending notifies (serial 2012060703) client 192.168.2.52#42892: transfer of 'domain.org/IN': AXFR-style IXFR started: TSIG rndc-key client 192.168.2.52#42892: transfer of 'domain.org/IN': AXFR-style IXFR ended ns2 (192.168.2.52) client 192.168.2.50#3762: received notify for zone 'domain.org': TSIG 'rndc-key' zone domain.org/IN: Transfer started. transfer of 'domain.org/IN' from 192.168.2.50#53: connected using 192.168.2.52#55747 zone domain.org/IN: transferred serial 2012060704: TSIG 'rndc-key' transfer of 'domain.org/IN' from 192.168.2.50#53: Transfer completed: 1 messages, 34 records, 1028 bytes, 0.001 secs (1028000 bytes/sec) Nothing happens on ns1. I've turned up the logging level but there's no information in syslog about the actual name servers bind has sent notifications to so I guess this is something it doesn't log. I've also tried watching tcpdump, it never makes any attempt to notify ns1 only ns2 192.168.2.50.56278 > 192.168.2.52.53: [udp sum ok] 56418 notify [b2&3=0x2400] [1a] [1au] ? SOA? domain.org. domain.org. [0s] SOA ns1.domain.net. dnsmaster.domain.net. ? 2012060801 10800 3600 604800 3600 ar: rndc-key. ANY [0s] TSIG hmac-md5.sig-alg.reg.int. fudge=300 maclen=16 origid=56418 error=0 otherlen=0 (174) the authoritive zone has both ns1 and ns2 records $ORIGIN domain.org. $TTL 3h @ IN SOA ns1.domain.net. dnsmaster.domain.net. ( 2012060801 ; Serial yyyymmddnn 3h ; Refresh After 3 hours 1h ; Retry Retry after 1 hour 1w ; Expire after 1 week 1h ) ; Minimum negative caching of 1 hour @ 3600 IN NS ns1.domain.net. @ 3600 IN NS ns2.domain.net. // Edit I have added also-notify {192.168.2.51;192.168.2.52;}; explicitly to the zone file and it all works fine, both ns1 and ns2 get notify messages and transfers succeed. I was under the impression bind would automatically send notifies to all NS records on a zone, maybe it's bugged?

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  • Request Limit Length Limits for IIS&rsquo;s requestFiltering Module

    - by Rick Strahl
    Today I updated my CodePaste.net site to MVC 3 and pushed an update to the site. The update of MVC went pretty smooth as well as most of the update process to the live site. Short of missing a web.config change in the /views folder that caused blank pages on the server, the process was relatively painless. However, one issue that kicked my ass for about an hour – and not foe the first time – was a problem with my OpenId authentication using DotNetOpenAuth. I tested the site operation fairly extensively locally and everything worked no problem, but on the server the OpenId returns resulted in a 404 response from IIS for a nice friendly OpenId return URL like this: http://codepaste.net/Account/OpenIdLogon?dnoa.userSuppliedIdentifier=http%3A%2F%2Frstrahl.myopenid.com%2F&dnoa.return_to_sig_handle=%7B634239223364590000%7D%7BjbHzkg%3D%3D%7D&dnoa.return_to_sig=7%2BcGhp7UUkcV2B8W29ibIDnZuoGoqzyS%2F%2FbF%2FhhYscgWzjg%2BB%2Fj10ZpNdBkUCu86dkTL6f4OK2zY5qHhCnJ2Dw%3D%3D&openid.assoc_handle=%7BHMAC-SHA256%7D%7B4cca49b2%7D%7BMVGByQ%3D%3D%7D&openid.claimed_id=http%3A%2F%2Frstrahl.myopenid.com%2F&openid.identity=http%3A%2F%2Frstrahl.myopenid.com%2F&openid.mode=id_res&openid.ns=http%3A%2F%2Fspecs.openid.net%2Fauth%2F2.0&openid.ns.sreg=http%3A%2F%2Fopenid.net%2Fextensions%2Fsreg%2F1.1&openid.op_endpoint=http%3A%2F%2Fwww.myopenid.com%2Fserver&openid.response_nonce=2010-10-29T04%3A12%3A53Zn5F4r5&openid.return_to=http%3A%2F%2Fcodepaste.net%2FAccount%2FOpenIdLogon%3Fdnoa.userSuppliedIdentifier%3Dhttp%253A%252F%252Frstrahl.myopenid.com%252F%26dnoa.return_to_sig_handle%3D%257B634239223364590000%257D%257BjbHzkg%253D%253D%257D%26dnoa.return_to_sig%3D7%252BcGhp7UUkcV2B8W29ibIDnZuoGoqzyS%252F%252FbF%252FhhYscgWzjg%252BB%252Fj10ZpNdBkUCu86dkTL6f4OK2zY5qHhCnJ2Dw%253D%253D&openid.sig=h1GCSBTDAn1on98sLA6cti%2Bj1M6RffNerdVEI80mnYE%3D&openid.signed=assoc_handle%2Cclaimed_id%2Cidentity%2Cmode%2Cns%2Cns.sreg%2Cop_endpoint%2Cresponse_nonce%2Creturn_to%2Csigned%2Csreg.email%2Csreg.fullname&openid.sreg.email=rstrahl%40host.com&openid.sreg.fullname=Rick+Strahl A 404 of course isn’t terribly helpful – normally a 404 is a resource not found error, but the resource is definitely there. So how the heck do you figure out what’s wrong? If you’re just interested in the solution, here’s the short version: IIS by default allows only for a 1024 byte query string, which is obviously exceeded by the above. The setting is controlled by the RequestFiltering module in IIS 6 and later which can be configured in ApplicationHost.config (in \%windir\system32\inetsvr\config). To set the value configure the requestLimits key like so: <configuration> <security> <requestFiltering> <requestLimits maxQueryString="2048"> </requestLimits> </requestFiltering> </security> </configuration> This fixed me right up and made the requests work. How do you find out about problems like this? Ah yes the troubles of an administrator? Read on and I’ll take you through a quick review of how I tracked this down. Finding the Problem The issue with the error returned is that IIS returns a 404 Resource not found error and doesn’t provide much information about it. If you’re lucky enough to be able to run your site from the localhost IIS is actually very helpful and gives you the right information immediately in a nicely detailed error page. The bottom of the page actually describes exactly what needs to be fixed. One problem with this easy way to find an error: You HAVE TO run localhost. On my server which has about 10 domains running localhost doesn’t point at the particular site I had problems with so I didn’t get the luxury of this nice error page. Using Failed Request Tracing to retrieve Error Info The first place I go with IIS errors is to turn on Failed Request Tracing in IIS to get more error information. If you have access to the server to make a configuration change you can enable Failed Request Tracing like this: Find the Failed Request Tracing Rules in the IIS Service Manager.   Select the option and then Edit Site Tracing to enable tracing. Then add a rule for * (all content) and specify status codes from 100-999 to capture all errors. if you know exactly what error you’re looking for it might help to specify it exactly to keep the number of errors down. Then run your request and let it fail. IIS will throw error log files into a folder like this C:\inetpub\logs\FailedReqLogFiles\W3SVC5 where the last 5 is the instance ID of the site. These files are XML but they include an XSL stylesheet that provides some decent formatting. In this case it pointed me straight at the offending module:   Ok, it’s the RequestFilteringModule. Request Filtering is built into IIS 6-7 and configured in ApplicationHost.config. This module defines a few basic rules about what paths and extensions are allowed in requests and among other things how long a query string is allowed to be. Most of these settings are pretty sensible but the query string value can easily become a problem especially if you’re dealing with OpenId since these return URLs are quite extensive. Debugging failed requests is never fun, but IIS 6 and forward at least provides us the tools that can help us point in the right direction. The error message the FRT report isn’t as nice as the IIS error message but it at least points at the offending module which gave me the clue I needed to look at request restrictions in ApplicationHost.config. This would still be a stretch if you’re not intimately familiar, but I think with some Google searches it would be easy to track this down with a few tries… Hope this was useful to some of you. Useful to me to put this out as a reminder – I’ve run into this issue before myself and totally forgot. Next time I got it, right?© Rick Strahl, West Wind Technologies, 2005-2010Posted in ASP.NET  Security  

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  • Top Tweets SOA Partner Community – November 2011

    - by JuergenKress
    Send your tweets @soacommunity #soacommunity and follow us at http://twitter.com/soacommunity soacommunity SOA Community Dutch ACEs SOA Partner Community award celebration wp.me/p10C8u-i9 OracleBPM Gauging Maturity of your BPM Strategy – part 1/2, bit.ly/vJE9UZ MagicChatzi Dutch ACE’s and ACE Directors had a small party: achatzia.blogspot.com/2011/11/celebr… leonsmiers #Capgemini #Oracle #BPM Blog index bit.ly/tUYtvD #yam lucasjellema Blog post by my colleague Emiel on the AMIS blog: Timeouts in Oracle SOA Suite 11g – tinyurl.com/73amo3r biemond Solving __OAUX_GENXSD_.TOP.XSD with BPEL: When you use an external web service in combination with a BPEL servic… t.co/Gzzatzrr OracleBlogs Jumpstart Fusion Middleware projects with Oracle User Productivity Kit ow.ly/1fJMev cpurdy on Oracle Coherence data grid, its new RESTful APIs, and Oracle Service Bus (OSB): blogs.oracle.com/slc/entry/orac… Accenture Learn how Service-Oriented Architecture can help public service agencies solve legacy system issues. bit.ly/sTteM4 #SOA eelzinga Thanks for organising it Andreas! #soacommunity eelzinga Had a nice drink with the fellow Dutch Oracle ACE members for a little celebration of the SOA Community Partner Award. #soacommunity EmielP Wrote a blogpost about timeouts in the #Oracle #SOA Suite: bit.ly/uhUcrX OracleBlogs Processing Binary Data in SOA Suite 11g t.co/Tzd1xBsY OracleBlogs Finding the Value in SOA by Stephen Bennett t.co/9MMLJoLz OTNArchBeat SOA All the Time; Architects in AZ; Clearing Info Integration hurdles t.co/5viNj8ib OracleBlogs Demo: Business Transaction Management with SOA Management Pack ow.ly/1fFBv3 OTNArchBeat SOA All the Time; Architects in AZ; Clearing Info Integration hurdles t.co/Dnfzo0PN oracletechnet Wikis.oracle.com lives leonsmiers A new #capgemini #oracle #blog, Measuring the Human Task activity in Oracle BPM bit.ly/uPan08 #yam @CapgeminiOracle OTNArchBeat 3 SOA business cases, explained in a 2-minute elevator speech | @JoeMcKendrick t.co/aYGNkZup OTNArchBeat Gartner, Inc. places Oracle SOA Governance in Magic Quadrant for SOA Governance Technologies t.co/bSG5cuTr Jphjulstad Red carpet to Oracle BPM – evita.no evita.no/ikbViewer/soa-… Oracle #Oracle Named a Leader in #SOA Governance Magic Quadrant by Leading Analyst Firm t.co/prnyGu2U soacommunity What presentations & topics do you like to see at the next SOA & BPM & Webcenter Community Forum early 2012? #soacommunity soacommunity Oracle BPM Suite 11g Handbook Released wp.me/p10C8u-hU OTNArchBeat SOA Development Virtual Developer Day (On Demand) | @soacommunity bit.ly/sqhQmX OracleBlogs SOA Development Virtual Developer Day (On Demand) t.co/MDrdnx0h 9 Nov Favorite Undo Retweet Reply OracleBlogs Specialized Partners Only! New Service to Promote Your Events t.co/qTgyEpY4 biemond @stevendavelaar this is for you t.co/hInKCcfY it explains your sso problem soacommunity SOA Development Virtual Developer Day (on demand) t.co/flXPWk4R soacommunity IPT Swiss SOA Experts – thanks for the nice ink wp.me/p10C8u-i3 soacommunity Enjoy #wjax specially the presentations from our #ACE @t_winterberg @myfear @AdamBien pic.twitter.com/m8VcBSG3 OTNArchBeat Discounts on books, more, for Oracle Technology Network members bit.ly/vRxMfB OracleSOA Justify the ROI of SOA in 10 seconds…a pic is worth 1000 words bit.ly/roi_of_soa_img #oraclesoa #soa #oow11 orclateamsoa A-Team SOA Blog: Case Management in BPM 11g -  Mark Foster Oracle BPM 11g & Case Management I’ve seen… t.co/l5zb6pFr t_winterberg Die nächste SIG #SOA steht an: 7.12. in Hamburg. Neues Tooling und Erfahrungen rund um Oracle FMW, SOA, BPM… (cont) deck.ly/~YC57v OracleBlogs Continuous Integration for SOA/BPM ow.ly/1fsekI OracleBlogs BPM Suite 11g Handbook Released ow.ly/1frlzv lucasjellema Iterating over collection (array) in BPM (and dispatching jobs for entries in array): t.co/1SEhSvWv – subprocesses are the key. lucasjellema Lucas Jellema Useful tip from Mark Nelson: BPM API documentation (as well as Human Workflow Service) available: redstack.wordpress.com/2011/09/28/api… OTNArchBeat SOA, cloud: it’s the architecture that matters | Joe McKendrick zd.net/tNCiTF orclateamsoa: Building a job dispatcher in BPM -or- Iterating over collections in BPM ow.ly/1frbrz orclateamsoa Using the Database as a Policy Store for SOA 11g ow.ly/1frbrA OracleBPM Oracle launches Process Accelerators for BPM: t.co/XPEE61QL Jphjulstad Human-Centric BPM Selection Checklist t.co/3TZXZHLH OracleBlogs Fusion Middleware General Session at OOW 2011: Missed It? Read On… t.co/aU5JvM6K gschmutz Great! The product page of the OSB 11g Development Cookbook is now online: t.co/5Jfbe6Ng Looking forward to get it, u too? brhubart Oracle IT Architecture Essentials; Lightweight Composite Service Development with SCA and Spring; Cloud Migration ow.ly/7esNg eelzinga New blogpost : Oracle Service Bus, Generic fault handling, bit.ly/sGr4UL #osb #oracleservicebus For regular information on Oracle SOA Suite become a member in the SOA Partner Community for registration please visit  www.oracle.com/goto/emea/soa (OPN account required) Blog Twitter LinkedIn Mix Forum Technorati Tags: soacommunity,twitter,Oracle,SOA Community,Jürgen Kress,OPN

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  • top Tweets SOA Partner Community – May 2012

    - by JuergenKress
    Send your tweets @soacommunity #soacommunity and follow us at http://twitter.com/soacommunity SOA Community BPMN2.0 Oracle notations poster from eaiesb http://wp.me/p10C8u-pu Torsten WinterbergLook out for new Oracle #BPM edition coming up soon: The Oracle BPM Standard edtion! Great news for easy entry, small licence fees. Yes! Danilo Schmiedel Had a great chat with customer yesterday about #OracleBPM. Next step will be a 5day event combining modeling and implementation @soacommunity Frank Nimphius Still reading "Oracle Business Process Management Suite 11g Handbook". Excellent resource for a non-SOA but ADF guy like me ;-) Oracle New webcast: Maximize #Oracle #WebLogic Server ROI with Oracle #Enterprise #Manager 12c on May 2 at 10 am PT. Register http://bit.ly/JFUrR9 OTNArchBeat@OTNArchBeat BPM in Financial Services Industry | Sanjeev Sharma http://bit.ly/HCCxui JDeveloper & ADF BPEL 11.1.1.6 Certified for Prebuilt E-Business Suite 12.1.3 SOA Integrations http://dlvr.it/1V9SxR Oracle UPK & Tutor Collaborate Attendees: Visit the UPK demo pod, SIGS, and sessions: If you are attending Collaborate 2012 - Sun. http://bit.ly/J39z65 Heidi Buelow see #fmw track RT @demed: Are you going to #KSCOPE12 in San Antonio, June 24-28? http://kscope12.com/component/ seminar/seminarslist?topicsid=6 Use promo code Fusion for discount! Sabine Leitner #SIG #Middleware 15.05. Frankfurt #Oracle #DOAG Planung & Aufbau WebLogic Server #WLS http://bit.ly/HKsCWV @OracleWebLogic @soacommunity SOA Community MDS explorer by Red Samurai http://wp.me/p10C8u-pp Biemond &reg; Retrieve or set a HTTP header from Oracle BPEL: With Oracle SOA Suite 11g patch 12928372 you can finally retrie http://bit.ly/JejTHC Lucas Jellema Call for papers for UKOUG 2012 has opened: http://techandebs.ukoug.org /default.asp?p=9306 (deadline 1st of June) OTNArchBeat BPM API usage: List all BPM Processes for a user | Kavitha Srinivasan http://bit.ly/IJKVfj demed SOA, Cloud + Service Tech symposium (London, Sep 24-25) call for paper is open http://www.servicetechsymposium. com /call2012.php @techsymp #oraclesoa OracleBlogs Lessons learned configuring OER 11g Workflows http://ow.ly/1iMsKh OTNArchBeat Scripting WebLogic Admin Server Startup | Antony Reynolds http://bit.ly/IH5ciU orclateamsoa A-Team Blog #ateam: BPM API usage: List all BPM Processes for a user http://ow.ly/1iJADp Lucas Jellema Just blogged about our Live FMW Application Development show during OBUG 2012, next Tuesday 24th April in Maastricht: OracleBlogs OEG integration with OSB/OWSM - 11g http://ow.ly/1iKx7G SOA Community SOA Community Newsletter April 2012 http://wp.me/p10C8u-pl Frank DorstRT @whitehorsesnl: Whiteblog: BPM Process Spaces in Oracle Webcenter (Patch Set 5(http://bit.ly/Hxzh29) #soacommunity #bpm #oracle) David Shaffer The Advanced SOA suite training class next week in Redwood City is full! Learned a lot about accepting credit card payments. OTNArchBeat Running Built-In Test Simulator with SOA Suite Healthcare 11g in PS4 and PS5 | Shub Lahiri http://bit.ly/IgI8GN SOA Community Oracle Fusion Middleware Innovation Awards 2012, Call for Nominations #ofmaward #soa #bpm #soacommunity OTNArchBeat Updated SOA Documents now available in ITSO Reference Library http://bit.ly/I3Y6Sg Oracle Middleware Data Integrator & SOA - why 2 products better than one for integration? Webcast: Apr 24 10 AM PT http://bit.ly/IzmtKR Andrejus Baranovskis Red Samurai MDS Cleaner V2.0 http://fb.me/FxLVz82w SOA Community “@rluttikhuizen: Chapter 4 of SOA Made Simple book "Classification of Services" ready for collegial review” can #soacommunity get a preview? Xavier Verhaeghe #Gartner figures are out: #Oracle top in App Server market share (43.1%) and Relational #Database, too (48.8%) in 2011 Sabine Leitner WLS12c, Exa*, IDM, EM12c, DB @ Private, Public, Hybrid #Cloud Event 26.04. FFM #Oracle http://bit.ly/zcRuxi @OracleCloudZone @soacommunity Michel Schildmeijer@wlscommunity @MiddlewareMagic @OTNArchBeat @Oracle_Fusion Oracle WebLogic / SOA Suite 11g HACMP Cluster take-over http://lnkd.in/G78qMd Oracle Middleware Hear how ODI and SOA's unified approach are key to untangling your business. April 24 10AM PT http://bit.ly/IdcsUz #Oracle OTNArchBeat Using SAP Adapter with OSB 11g (PS3) | Shub Lahiri http://bit.ly/IswR9K SOA Community Integrating with Oracle Fusion Applications: Discovering Integration Artifacts https://blogs.oracle.com/governance /entry/integrating_with_oracle_fusion_ applications #soacommunity #oer #governance OracleBlogs Tuning B2B Server Engine Threads in SOA Suite 11g http://ow.ly/1iH5bx OracleBlogs Top Tweets SOA Partner Community April 2012 http://ow.ly/1iVHfA SOA Community Oracle SOA Suite 11g Database Growth Management http://wp.me/p10C8u-pi Sabine Leitner WLS12c,Exa*,IDM,EM12c, DB @ Private, Public, Hybrid #Cloud Event 24.04. München #Oracle http://bit.ly/zcRuxi @OracleCloudZone @soacommunity SOA Community Testing Business Rules by Mark Nelson http://redstack.wordpress.com/2012/ 04/18/testing-business-rules/ #soacommunity #soa #rules #oracle SOA CommunityTop Tweets SOA Partner Community - April 2012 http://wp.me/p10C8u-pn OTNArchBeat Webcast: Untangle Your Business with Oracle Unified SOA and Data Integration - April 24 http://bit.ly/IQexqT OTNArchBeat"Do more with SOA Integration: Best of Packt" contributors include @gschmutz, @llaszews, many others http://amzn.to/HVWwYt ServiceTechSymposium Symposium agenda page coming together - page launched today with keynotes, sessions to be added shortly. http://www.servicetechsymposium.com /agenda2012.php SOA Community Shipping Specialization plaques - congratulation #Fujitsu - request yours https://soacommunity.wordpress. com/2011/02/23/who-are-the-soa-experts-specialization-recognized-by-customers/ #soacommunity #OPN http://pic.twitter.com/YMRm2ion ServiceTechSymposium call for Presentations Submission Deadline Moved Up to May 21, 2012. Send your presentations submissions ASAP! ServiceTechSymposium Symposium Keynote by Vicente Navarro, European Space Agency, added to agenda: "SOA & Service-Orientation at the European Space Agency" SOA Community Running a large #soa project? Make sure you read - Oracle SOA Suite 11g Database Growth Management #soacommunity #opn SOA Community List all BPM Processes for a user by Yogesh l #bpm #oracle #soacommunity  For regular information on Oracle SOA Suite become a member in the SOA Partner Community for registration please visit  www.oracle.com/goto/emea/soa (OPN account required) Blog Twitter LinkedIn Mix Forum Technorati Tags: soacommunity, twitter,Oracle,SOA Community,Jürgen Kress,OPN,SOA,BPM

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  • BPM Suite 11gR1 Released

    - by Manoj Das
    This morning (April 27th, 2010), Oracle BPM Suite 11gR1 became available for download from OTN and eDelivery. If you have been following our plans in this area, you know that this is the release unifying BEA ALBPM product, which became Oracle BPM10gR3, with the Oracle stack. Some of the highlights of this release are: BPMN 2.0 modeling and simulation Web based Process Composer for BPMN and Rules authoring Zero-code environment with full access to Oracle SOA Suite’s rich set of application and other adapters Process Spaces – Out-of-box integration with Web Center Suite Process Analytics – Native process cubes as well as integration with Oracle BAM You can learn more about this release from the documentation. Notes about downloading and installing Please note that Oracle BPM Suite 11gR1 is delivered and installed as part of SOA 11.1.1.3.0, which is a sparse release (only incremental patch). To install: Download and install SOA 11.1.1.2.0, which is a full release (you can find the bits at the above location) Download and install SOA 11.1.1.3.0 During configure step (using the Fusion Middleware configuration wizard), use the Oracle Business Process Management template supplied with the SOA Suite11g (11.1.1.3.0) If you plan to use Process Spaces, also install Web Center 11.1.1.3.0, which also is delivered as a sparse release and needs to be installed on top of Web Center 11.1.1.2.0 Some early feedback We have been receiving very encouraging feedback on this release. Some quotes from partners are included below: “I just attended a preview workshop on BPM Studio, Oracle's BPMN 2.0 tool, held by Clemens Utschig Utschig from Oracle HQ. The usability and ease to get started are impressive. In the business view analysts can intuitively start modeling, then developers refine in their own, more technical view. The BPM Studio sets itself apart from pure play BPMN 2.0 tools by being seamlessly integrated inside a holistic SOA / BPM toolset: BPMN models are placed in SCA-Composites in SOA Suite 11g. This allows to abstract away the complexities of SOA integration aspects from business process aspects. For UIs in BPMN tasks, you have the richness of ADF 11g based Frontends. With BPM Studio we architects have a new modeling and development IDE that gives us interesting design challenges to grasp and elaborate, since many things BPMN 2.0 are different from good ol' BPEL. For example, for simple transformations, you don't use BPEL "assign" any more, but add the transformation directly to the service call. There is much less XPath involved. And, there is no translation from model to BPEL code anymore, so the awkward process model to BPEL roundtrip, which never really worked as well as it looked on marketing slides, is obsolete: With BPMN 2.0 "the model is the code". Now, these are great times to start the journey into BPM! Some tips: Start Projects smoothly, with initial processes being not overly complex and not using the more esoteric areas of BPMN, to manage the learning path and to stay successful with each iteration. Verify non functional requirements by conducting performance and load tests early. As mentioned above, separate all technical integration logic into SOA Suite or Oracle Service Bus. And - share your experience!” Hajo Normann, SOA Architect - Oracle ACE Director - Co-Leader DOAG SIG SOA   "Reuse of components across the Oracle 11G Fusion Middleware stack, like for instance a Database Adapter, is essential. It improves stability and predictability of the solution. BPM just is one of the components plugging into the stack and reuses all other components." Mr. Leon Smiers, Oracle Solution Architect, Capgemini   “I had the opportunity to follow a hands-on workshop held by Clemens for Oracle partners and I was really impressed of the overall offering of BPM11g. BPM11g allows the execution of BPMN 2.0 processes, without having to transform/translate them first to BPEL in order to be executable. The fact that BPMN uses the same underlying service infrastructure of SOA Suite 11g has a lot of benefits for us already familiar with SOA Suite 11g. BPMN is just another SCA component within a SCA composite and can (re)use all the existing components like Rules, Human Workflow, Adapters and Mediator. I also like the fact that BPMN runs on the same service engine as BPEL. By that all known best practices for making a BPEL  process reliable are valid for BPMN processes as well. Last but not least, BPMN is integrated into the superior end-to-end tracing of SOA Suite 11g. With BPM11g, Oracle offers a very competitive product which will have a big effect on the IT market. Clemens and Jürgen: Thanks for the great workshop! I’m really looking forward to my first project using Oracle BPM11g!” Guido Schmutz, Technology Manager / Oracle ACE Director for Fusion Middleware and SOA, Company:  Trivadis Some earlier feedback were summarized in this post.

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  • CodePlex Daily Summary for Sunday, November 18, 2012

    CodePlex Daily Summary for Sunday, November 18, 2012Popular ReleasesSTeaL : stealed functionarities from STL: STeaL 0.3 (prerelease): set_adaptor<T> added.ExtJS based ASP.NET 2.0 Controls: FineUI v3.2.0: +2012-11-18 v3.2.0 -?????????????????SelectedValueArray????????(◇?◆:)。 -???????????????????RecoverPropertiesFromJObject????(〓?〓、????、??、Vian_Pan)。 -????????????,?????????????,???SelectedValueArray???????(sam.chang)。 -??Alert.Show???????????(swtseaman)。 -???????????????,??Icon??IconUrl????(swtseaman)。 -?????????TimePicker(??)。 -?????????,??/res.axd?css=blue.css&v=1。 -????????,?????????????,???????。 -????MenuCheckBox(???????)。 -?RadioButton??AutoPostBack??。 -???????FCKEditor?????????...BugNET Issue Tracker: BugNET 1.2: Please read our release notes for BugNET 1.2: http://blog.bugnetproject.com/bugnet-1-2-has-been-released Please do not post questions as reviews. Questions should be posted in the Discussions tab, where they will usually get promptly responded to. If you post a question as a review, you will pollute the rating, and you won't get an answer.Paint.NET PSD Plugin: 2.2.0: Changes: Layer group visibility is now applied to all layers within the group. This greatly improves the visual fidelity of complex PSD files that have hidden layer groups. Layer group names are prefixed so that users can get an indication of the layer group hierarchy. (Paint.NET has a flat list of layers, so the hierarchy is flattened out on load.) The progress bar now reports status when saving PSD files, instead of showing an indeterminate rolling bar. Performance improvement of 1...replaceSID: replaceSID v0.1.145.12321: Changelog: - Added Backup ACL - Added Restore ACL - Some Bugfixes - Settings Tested in development enviroment. Still needs to be tested in production.AppBarUtils: AppBarUtils 2.2: Starting from this release, AppBarUtils supports both Windows Phone SDK 7.1 and 8.0. You can download the dll accordingly. If you're upgrading an existing app to Windows Phone 8.0, you can just replace the dll without any changes to the existing code. Of course, you need to make sure that you have the correct Blend SDK dll referenced. The source code contains two testing projects, one for WP SDK 7.1, the other for WP SDK 8.0, which share the same code base. You can refer to these two projec...YALV! - Yet Another Log4Net Viewer: YALV! v1.2.0.0: New release for YALV Project - Version 1.2.0.0 New feature: - Russian localization Improvements - Minor GUI changesfastBinaryJSON: v1.3.5: - added support for root level DataSet and DataTable deserialize (you have to do ToObject<DataSet>(...) ) - added dataset tests - added MonoDroid projectWater Entity for SunBurn: Sunburn Water Entity For 2.0.1.8 (Deffered Only): Sunburn water entity for Sunburn 2.0.1.8 for deffered rendering only, forward water is not working yet. You need to download water normal maps, from Sunburn Reflection/Refraction example from Here.CRM 2011 Visual Ribbon Editor: Visual Ribbon Editor (1.3.1116.7): [IMPROVED] Detailed error message descriptions for FaultException [FIX] Fixed bug in rule CrmOfflineAccessStateRule which had incorrect State attribute name [FIX] Fixed bug in rule EntityPropertyRule which was missing PropertyValue attribute [FIX] Current connection information was not displayed in status bar while refreshing list of entitiesSuper Metroid Randomizer: Super Metroid Randomizer v5: v5 -Added command line functionality for automation purposes. -Implented Krankdud's change to randomize the Etecoon's item. NOTE: this version will not accept seeds from a previous version. The seed format has changed by necessity. v4 -Started putting version numbers at the top of the form. -Added a warning when suitless Maridia is required in a parsed seed. v3 -Changed seed to only generate filename-legal characters. Using old seeds will still work exactly the same. -Files can now be saved...Caliburn Micro: WPF, Silverlight, WP7 and WinRT/Metro made easy.: Caliburn.Micro v1.4: Changes This version includes many bug fixes across all platforms, improvements to nuget support and...the biggest news of all...full support for both WinRT and WP8. Download Contents Debug and Release Assemblies Samples Readme.txt License.txt Packages Available on Nuget Caliburn.Micro – The full framework compiled into an assembly. Caliburn.Micro.Start - Includes Caliburn.Micro plus a starting bootstrapper, view model and view. Caliburn.Micro.Container – The Caliburn.Micro invers...DirectX Tool Kit: November 15, 2012: November 15, 2012 Added support for WIC2 when available on Windows 8 and Windows 7 with KB 2670838 Cleaned up warning level 4 warningsDotNetNuke® Community Edition CMS: 06.02.05: Major Highlights Updated the system so that it supports nested folders in the App_Code folder Updated the Global Error Handling so that when errors within the global.asax handler happen, they are caught and shown in a page displaying the original HTTP error code Fixed issue that stopped users from specifying Link URLs that open on a new window Security FixesFixed issue in the Member Directory module that could show members to non authenticated users Fixed issue in the Lists modul...xUnit.net Contrib: xunitcontrib-resharper 0.7 (RS 7.1, 6.1.1): xunitcontrib release 0.6.1 (ReSharper runner) This release provides a test runner plugin for Resharper 7.1 RTM and 6.1.1, targetting all versions of xUnit.net. (See the xUnit.net project to download xUnit.net itself.) This release drops 7.0 support and targets the latest revisions of the last two major versions of ReSharper (namely 7.0 and 6.1.1). Copies of the plugin that support previous verions of ReSharper can be downloaded from this release. Also note that all builds work against ALL ...OnTopReplica: Release 3.4: Update to the 3 version with major fixes and improvements. Compatible with Windows 8. Now runs (and requires) .NET Framework v.4.0. Added relative mode for region selection (allows the user to select regions as margins from the borders of the thumbnail, useful for windows which have a variable size but fixed size controls, like video players). Improved window seeking when restoring cloned thumbnail or cloning a window by title or by class. Improved settings persistence. Improved co...DotSpatial: DotSpatial 1.4: This is a Minor Release. See the changes in the issue tracker. Minimal -- includes DotSpatial core and essential extensions Extended -- includes debugging symbols and additional extensions Tutorials are available. Just want to run the software? End user (non-programmer) version available branded as MapWindow Want to add your own feature? Develop a plugin, using the template and contribute to the extension feed (you can also write extensions that you distribute in other ways). Components ...WinRT XAML Toolkit: WinRT XAML Toolkit - 1.3.5: WinRT XAML Toolkit based on the Windows 8 RTM SDK. Download the latest source from the SOURCE CODE page. For compiled version use NuGet. You can add it to your project in Visual Studio by going to View/Other Windows/Package Manager Console and entering: PM> Install-Package winrtxamltoolkit Features Attachable Behaviors AwaitableUI extensions Controls Converters Debugging helpers Extension methods Imaging helpers IO helpers VisualTree helpers Samples Recent changes Docum...AcDown?????: AcDown????? v4.3: ??●AcDown??????????、??、??、???????。????,????,?????????????????????????。???????????Acfun、????(Bilibili)、??、??、YouTube、??、???、??????、SF????、????????????。 ●??????AcPlay?????,??????、????????????????。 ● AcDown??????????????????,????????????????????????????。 ● AcDown???????C#??,????.NET Framework 2.0??。?????"Acfun?????"。 ????32??64? Windows XP/Vista/7/8 ???? 32??64? ???Linux ????(1)????????Windows XP???,????????.NET Framework 2.0???(x86),?????"?????????"??? (2)???????????Linux???,????????Mono?? ??2...????: ???? 1.0: ????New ProjectsBigStringComparer: Proj for compa re big strin gsCarShow: ProjDocManager: ProjFinDesktop: ProjFolder-File Compare: Windows app that compares the files in two given folders/subfolders. Results display in five tabs: Files in A,in B, in A not in B, in B not in A, and differentFoq: Foq is a lightweight mocking library for F#. Use Foq to mock abstract classes and interfaces.GtFramework: A 2D Game FrameworkGucSharep: ProjiDrive: The iDrive solution is a website that enables you to upload and share files.InitialPrototype: This is Initial Prototype of my web 2.0 projectIvanProjects: This is Ivan's ProjectsJAudio Player: JAudio Player is a player for BMS music sequences that are used in several games for Nintendo GameCube and Wii.JGoldDirector: ProjKontinum: Demo site for working flow.Netkill: Simple kill button for network connectivity, with some additional features. Disable network connectivity with a single click, or when a certain program starts.only one test project: um projecto que basicamente não faz nada!! :PP2StillLife: Making a still life with shaders. Warps an image.PetaPX: PetaPX is a photo community powered by creative people worldwide that lets you discover, share, buy and sell inspiring photographs. Qbicon Editor: 2D Polygonal Maps Editor for games and other - Graphical Editor for polygonal objects, points. - Layers - Textures Quick-Chat-Application: Chat Application made using multi-layered architectures( ASP.NET MVC and WCF service).Regular Expression Editor: Regular Expression Editor is the tool for editing and testing Regular ExpressionsScout - Web Patrol: A Microsoft Internet Explorer plug-in that will notifies the user when selected Favorites have been updated since those pages were last visited.silowniafitness: nothingnessSports Tracker: Sports league management system.Stellissimo Wordpress Text Box plugin: Develope to wordpress plugin to add a text boxvba: vba????WCFNH11: clase nh WebCalendar: This will be the summary...?lassifier Tool For OpenCV: Program to calculate vector for function DetectMultiScale in OpenCV.

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  • Computer Networks UNISA - Chap 8 &ndash; Wireless Networking

    - by MarkPearl
    After reading this section you should be able to Explain how nodes exchange wireless signals Identify potential obstacles to successful transmission and their repercussions, such as interference and reflection Understand WLAN architecture Specify the characteristics of popular WLAN transmission methods including 802.11 a/b/g/n Install and configure wireless access points and their clients Describe wireless MAN and WAN technologies, including 802.16 and satellite communications The Wireless Spectrum All wireless signals are carried through the air by electromagnetic waves. The wireless spectrum is a continuum of the electromagnetic waves used for data and voice communication. The wireless spectrum falls between 9KHZ and 300 GHZ. Characteristics of Wireless Transmission Antennas Each type of wireless service requires an antenna specifically designed for that service. The service’s specification determine the antenna’s power output, frequency, and radiation pattern. A directional antenna issues wireless signals along a single direction. An omnidirectional antenna issues and receives wireless signals with equal strength and clarity in all directions The geographical area that an antenna or wireless system can reach is known as its range Signal Propagation LOS (line of sight) uses the least amount of energy and results in the reception of the clearest possible signal. When there is an obstacle in the way, the signal may… pass through the object or be obsrobed by the object or may be subject to reflection, diffraction or scattering. Reflection – waves encounter an object and bounces off it. Diffraction – signal splits into secondary waves when it encounters an obstruction Scattering – is the diffusion or the reflection in multiple different directions of a signal Signal Degradation Fading occurs as a signal hits various objects. Because of fading, the strength of the signal that reaches the receiver is lower than the transmitted signal strength. The further a signal moves from its source, the weaker it gets (this is called attenuation) Signals are also affected by noise – the electromagnetic interference) Interference can distort and weaken a wireless signal in the same way that noise distorts and weakens a wired signal. Frequency Ranges Older wireless devices used the 2.4 GHZ band to send and receive signals. This had 11 communication channels that are unlicensed. Newer wireless devices can also use the 5 GHZ band which has 24 unlicensed bands Narrowband, Broadband, and Spread Spectrum Signals Narrowband – a transmitter concentrates the signal energy at a single frequency or in a very small range of frequencies Broadband – uses a relatively wide band of the wireless spectrum and offers higher throughputs than narrowband technologies The use of multiple frequencies to transmit a signal is known as spread-spectrum technology. In other words a signal never stays continuously within one frequency range during its transmission. One specific implementation of spread spectrum is FHSS (frequency hoping spread spectrum). Another type is known as DSS (direct sequence spread spectrum) Fixed vs. Mobile Each type of wireless communication falls into one of two categories Fixed – the location of the transmitted and receiver do not move (results in energy saved because weaker signal strength is possible with directional antennas) Mobile – the location can change WLAN (Wireless LAN) Architecture There are two main types of arrangements Adhoc – data is sent directly between devices – good for small local devices Infrastructure mode – a wireless access point is placed centrally, that all devices connect with 802.11 WLANs The most popular wireless standards used on contemporary LANs are those developed by IEEE’s 802.11 committee. Over the years several distinct standards related to wireless networking have been released. Four of the best known standards are also referred to as Wi-Fi. They are…. 802.11b 802.11a 802.11g 802.11n These four standards share many characteristics. i.e. All 4 use half duplex signalling Follow the same access method Access Method 802.11 standards specify the use of CSMA/CA (Carrier Sense Multiple Access with Collision Avoidance) to access a shared medium. Using CSMA/CA before a station begins to send data on an 802.11 network, it checks for existing wireless transmissions. If the source node detects no transmission activity on the network, it waits a brief period of time and then sends its transmission. If the source does detect activity, it waits a brief period of time before checking again. The destination node receives the transmission and, after verifying its accuracy, issues an acknowledgement (ACT) packet to the source. If the source receives the ACK it assumes the transmission was successful, – if it does not receive an ACK it assumes the transmission failed and sends it again. Association Two types of scanning… Active – station transmits a special frame, known as a prove, on all available channels within its frequency range. When an access point finds the probe frame, it issues a probe response. Passive – wireless station listens on all channels within its frequency range for a special signal, known as a beacon frame, issued from an access point – the beacon frame contains information necessary to connect to the point. Re-association occurs when a mobile user moves out of one access point’s range and into the range of another. Frames Read page 378 – 381 about frames and specific 802.11 protocols Bluetooth Networks Sony Ericson originally invented the Bluetooth technology in the early 1990s. In 1998 other manufacturers joined Ericsson in the Special Interest Group (SIG) whose aim was to refine and standardize the technology. Bluetooth was designed to be used on small networks composed of personal communications devices. It has become popular wireless technology for communicating among cellular telephones, phone headsets, etc. Wireless WANs and Internet Access Refer to pages 396 – 402 of the textbook for details.

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