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  • Can I return values to PHP from an anonymous PL/SQL block?

    - by RenderIn
    I'm using PHP and OCI8 to execute anonymous Oracle PL/SQL blocks of code. Is there any way for me to bind a variable and get its output upon completion of the block, just as I can when I call stored procedures in a similar way? $SQL = "declare something varchar2 := 'I want this returned'; begin --How can I return the value of 'something' into a bound PHP variable? end;";

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  • What makes static initialization functions good, bad, or otherwise?

    - by Richard Levasseur
    Suppose you had code like this: _READERS = None _WRITERS = None def Init(num_readers, reader_params, num_writers, writer_params, ...args...): ...logic... _READERS = new ReaderPool(num_readers, reader_params) _WRITERS = new WriterPool(num_writers, writer_params) ...more logic... class Doer: def __init__(...args...): ... def Read(self, ...args...): c = _READERS.get() try: ...work with conn finally: _READERS.put(c) def Writer(...): ...similar to Read()... To me, this is a bad pattern to follow, some cons: Doers can be created without its preconditions being satisfied The code isn't easily testable because ConnPool can't be directly mocked out. Init has to be called right the first time. If its changed so it can be called multiple times, extra logic has to be added to check if variables are already defined, and lots of NULL values have to be passed around to skip re-initializing. In the event of threads, the above becomes more complicated by adding locking Globals aren't being used to communicate state (which isn't strictly bad, but a code smell) On the other hand, some pros: its very convenient to call Init(5, "user/pass", 2, "user/pass") It simple and "clean" Personally, I think the cons outweigh the pros, that is, testability and assured preconditions outweigh simplicity and convenience.

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  • How can I block a specific type of DDoS attack?

    - by Mark
    My site is being attacked and is using up all the RAM. I looked at the Apache logs and every malicious hit seems to simply be a POST request on /, which is never required by a normal user. So I thought and wondered if there's any sort of solution or utility that will monitor my Apache logs and block every IP that performs a POST request on the site root. I'm not familiar with DDoS protection and searching didn't seem to give me an answer, so I came here. Thanks. Example logs: 103.3.221.202 - - [30/Sep/2012:16:02:03 +0000] "POST / HTTP/1.1" 302 485 "-" "Mozilla/5.0 (iPad; CPU OS 5_1_1 like Mac OS X) AppleWebKit/534.46 (KHTML, like Gecko) Version/5.1 Mobile/9B206 Safari/7534.48.3" 122.72.80.100 - - [30/Sep/2012:16:02:03 +0000] "POST / HTTP/1.1" 302 485 "-" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_7_4) AppleWebKit/536.11 (KHTML, like Gecko) Chrome/20.0.1132.47 Safari/536.11" 122.72.28.15 - - [30/Sep/2012:16:02:04 +0000] "POST / HTTP/1.1" 302 485 "-" "Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; SV1; .NET CLR 2.0.50727)" 210.75.120.5 - - [30/Sep/2012:16:02:04 +0000] "POST / HTTP/1.1" 302 485 "-" "Mozilla/5.0 (Windows NT 6.1; rv:12.0) Gecko/20100101 Firefox/12.0" 122.96.59.103 - - [30/Sep/2012:16:02:04 +0000] "POST / HTTP/1.1" 302 485 "-" "Mozilla/5.0 (Linux; U; Android 2.2; fr-fr; Desire_A8181 Build/FRF91) App3leWebKit/53.1 (KHTML, like Gecko) Version/4.0 Mobile Safari/533.1" 122.96.59.103 - - [30/Sep/2012:16:02:04 +0000] "POST / HTTP/1.1" 302 485 "-" "Mozilla/5.0 (Linux; U; Android 2.2; fr-fr; Desire_A8181 Build/FRF91) App3leWebKit/53.1 (KHTML, like Gecko) Version/4.0 Mobile Safari/533.1" 122.72.124.3 - - [30/Sep/2012:16:02:04 +0000] "POST / HTTP/1.1" 302 485 "-" "Mozilla/5.0 (X11; Ubuntu; Linux i686; rv:13.0) Gecko/20100101 Firefox/13.0.1" 122.72.112.148 - - [30/Sep/2012:16:02:04 +0000] "POST / HTTP/1.1" 302 485 "-" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10.7; rv:13.0) Gecko/20100101 Firefox/13.0.1" 190.39.210.26 - - [30/Sep/2012:16:02:04 +0000] "POST / HTTP/1.0" 302 485 "-" "Mozilla/5.0 (Windows NT 6.0; rv:13.0) Gecko/20100101 Firefox/13.0.1" 210.213.245.230 - - [30/Sep/2012:16:02:04 +0000] "POST / HTTP/1.0" 302 485 "-" "Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; SV1; .NET CLR 2.0.50727)" 101.44.1.25 - - [30/Sep/2012:16:02:12 +0000] "POST / HTTP/1.1" 302 522 "-" "Mozilla/5.0 (iPhone; CPU iPhone OS 5_1_1 like Mac OS X) AppleWebKit/534.46 (KHTML, like Gecko) Version/5.1 Mobile/9B206 Safari/7534.48.3" 101.44.1.28 - - [30/Sep/2012:16:02:12 +0000] "POST / HTTP/1.1" 302 522 "-" "Mozilla/5.0 (Windows NT 5.1; rv:13.0) Gecko/20100101 Firefox/13.0.1" 101.44.1.28 - - [30/Sep/2012:16:02:14 +0000] "POST / HTTP/1.1" 302 522 "-" "Mozilla/5.0 (Windows NT 5.1; rv:13.0) Gecko/20100101 Firefox/13.0.1" 103.3.221.202 - - [30/Sep/2012:16:02:13 +0000] "POST / HTTP/1.1" 302 466 "-" "Mozilla/5.0 (iPad; CPU OS 5_1_1 like Mac OS X) AppleWebKit/534.46 (KHTML, like Gecko) Version/5.1 Mobile/9B206 Safari/7534.48.3" 211.161.152.104 - - [30/Sep/2012:16:02:12 +0000] "POST / HTTP/1.1" 302 522 "-" "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)" 101.44.1.25 - - [30/Sep/2012:16:02:12 +0000] "POST / HTTP/1.1" 302 522 "-" "Mozilla/5.0 (Windows NT 5.1) AppleWebKit/536.11 (KHTML, like Gecko) Chrome/20.0.1132.47 Safari/536.11" 101.44.1.25 - - [30/Sep/2012:16:02:11 +0000] "POST / HTTP/1.1" 302 522 "-" "Mozilla/5.0 (Windows NT 5.1) AppleWebKit/536.11 (KHTML, like Gecko) Chrome/20.0.1132.47 Safari/536.11" 211.161.152.105 - - [30/Sep/2012:16:02:12 +0000] "POST / HTTP/1.1" 302 522 "-" "Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.2) Gecko/20100115 Firefox/3.6" 211.161.152.105 - - [30/Sep/2012:16:02:12 +0000] "POST / HTTP/1.1" 302 522 "-" "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; MRA 5.8 (build 4157); .NET CLR 2.0.50727; AskTbPTV/5.11.3.15590)" 211.161.152.105 - - [30/Sep/2012:16:02:12 +0000] "POST / HTTP/1.1" 302 522 "-" "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; MRA 5.8 (build 4157); .NET CLR 2.0.50727; AskTbPTV/5.11.3.15590)" 101.44.1.25 - - [30/Sep/2012:16:02:12 +0000] "POST / HTTP/1.1" 302 522 "-" "Mozilla/5.0 (Windows NT 5.1) AppleWebKit/536.11 (KHTML, like Gecko) Chrome/20.0.1132.47 Safari/536.11" 101.44.1.25 - - [30/Sep/2012:16:02:12 +0000] "POST / HTTP/1.1" 302 522 "-" "Mozilla/5.0 (iPhone; CPU iPhone OS 5_1_1 like Mac OS X) AppleWebKit/534.46 (KHTML, like Gecko) Version/5.1 Mobile/9B206 Safari/7534.48.3" 211.161.152.108 - - [30/Sep/2012:16:02:12 +0000] "POST / HTTP/1.1" 302 522 "-" "Mozilla/5.0 (iPad; CPU OS 5_1_1 like Mac OS X) AppleWebKit/534.46 (KHTML, like Gecko) Version/5.1 Mobile/9B206 Safari/7534.48.3" 101.44.1.28 - - [30/Sep/2012:16:02:13 +0000] "POST / HTTP/1.1" 302 522 "-" "Mozilla/5.0 (Windows NT 5.1; rv:13.0) Gecko/20100101 Firefox/13.0.1" 211.161.152.106 - - [30/Sep/2012:16:02:11 +0000] "POST / HTTP/1.1" 302 522 "-" "Mozilla/5.0 (Windows NT 5.1; rv:5.0.1) Gecko/20100101 Firefox/5.0.1" 103.3.221.202 - - [30/Sep/2012:16:02:13 +0000] "POST / HTTP/1.1" 302 466 "-" "Mozilla/5.0 (iPad; CPU OS 5_1_1 like Mac OS X) AppleWebKit/534.46 (KHTML, like Gecko) Version/5.1 Mobile/9B206 Safari/7534.48.3" 101.44.1.28 - - [30/Sep/2012:16:02:11 +0000] "POST / HTTP/1.1" 302 522 "-" "Mozilla/5.0 (Windows NT 5.1; rv:13.0) Gecko/20100101 Firefox/13.0.1" 211.161.152.105 - - [30/Sep/2012:16:02:12 +0000] "POST / HTTP/1.1" 302 522 "-" "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; MRA 5.8 (build 4157); .NET CLR 2.0.50727; AskTbPTV/5.11.3.15590)" 211.161.152.104 - - [30/Sep/2012:16:02:12 +0000] "POST / HTTP/1.1" 302 522 "-" "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)" 211.161.152.104 - - [30/Sep/2012:16:02:12 +0000] "POST / HTTP/1.1" 302 522 "-" "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)" 211.161.152.105 - - [30/Sep/2012:16:02:12 +0000] "POST / HTTP/1.1" 302 522 "-" "Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.2) Gecko/20100115 Firefox/3.6" 101.44.1.25 - - [30/Sep/2012:16:02:10 +0000] "POST / HTTP/1.1" 302 522 "-" "Mozilla/5.0 (Windows NT 5.1) AppleWebKit/536.11 (KHTML, like Gecko) Chrome/20.0.1132.47 Safari/536.11" 122.72.124.2 - - [30/Sep/2012:16:02:17 +0000] "POST / HTTP/1.1" 302 522 "-" "Mozilla/5.0 (Windows NT 5.1; rv:13.0) Gecko/20100101 Firefox/13.0.1" 122.72.124.2 - - [30/Sep/2012:16:02:11 +0000] "POST / HTTP/1.1" 302 522 "-" "Mozilla/5.0 (Windows NT 5.1; rv:13.0) Gecko/20100101 Firefox/13.0.1" 122.72.124.2 - - [30/Sep/2012:16:02:17 +0000] "POST / HTTP/1.1" 302 522 "-" "Mozilla/5.0 (Windows NT 5.1; rv:13.0) Gecko/20100101 Firefox/13.0.1" 210.213.245.230 - - [30/Sep/2012:16:02:12 +0000] "POST / HTTP/1.0" 302 522 "-" "Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; SV1; .NET CLR 2.0.50727)" iptables -L: Chain INPUT (policy ACCEPT) target prot opt source destination Chain FORWARD (policy ACCEPT) target prot opt source destination Chain OUTPUT (policy ACCEPT) target prot opt source destination - bui@debian:~$ sudo iptables -I INPUT 1 -m string --algo bm --string 'Keep-Alive: 300' -j DROP iptables: No chain/target/match by that name. bui@debian:~$ sudo iptables -A INPUT -m string --algo bm --string 'Keep-Alive: 300' -j DROP iptables: No chain/target/match by that name.

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  • Why should I not wrap every block in "try"-"catch"?

    - by Konrad
    I have always been of the belief that if a method can throw an exception then it is reckless not to protect this call with a meaningful try block. I just posted 'You should ALWAYS wrap calls that can throw in try, catch blocks.' to this question and was told that it was 'remarkably bad advice' - I'd like to understand why. Thanks!

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  • GCC how to block system calls within a program?

    - by CMPITG
    Does anyone tell me how to block system calls within a program, please? I am building a system which takes a piece of C source code, compiles it with gcc and runs it. For security reasons, I need to prevent the compiled program from calling system calls. Is there any way to do it, from the source code level (e.g. stripping the header files of gcc, detecting malicious external calls, ...) to the executable level?

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  • Too much data for RSA block fail. What is PKCS#7?

    - by Tom Brito
    Talking about javax.crypto.Cipher; I was trying to encrypt data using Cipher.getInstance("RSA/None/NoPadding", "BC"); but I got the exception: ArrayIndexOutOfBoundsException: too much data for RSA block Looks like is something related to the "NoPadding", so, reading about padding, looks like CBC is the best approach to use here. I found at google something about "RSA/CBC/PKCS#7", what is this "PKCS#7"? And why its not listed on sun's standard algorithm names?

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  • How can I get valgrind to tell me the address of each non-freed block of memory?

    - by James
    Valgrind tells me function xxx allocated memory which was not freed. Fine. It's proving more difficult than usual to trace however. To this end I have created numerous: #ifdef DEBUG fprintf(stderr, "something happening:%lx\n", (unsigned long)ptr); #endif So I just need to match these ptr addresses that are displayed with the addresses of non-freed memory. How can I get valgrind to tell me the address of each non-freed block of memory?

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  • How to retrieve parent container ID after sorting using Jquery sortable??

    - by user187580
    Hello I have following markup and javascript to sort some items. Items can be sorted within a block or across other blocks. It works but I have a problem in retrieving correct block ID after an item is moved from one block to another. For example, if I move item 1 within "Block 1", I get "I am in Block= block_1" but if I move Item 1 to Block 2 I still get I am in Block 1. But I want to make the block 2 as its parent container. I need to retrieve this id so that I can do some ajax and update the db accordingly. Can you please help me correct this?? <div id="blocks_sortable"> <div id="block_1"> <h2>Block 1</h2> <div class="items_sortable connectedSortable"> <div id="item_1"> <span>Item 1</span></div> <div id="item_2"> <span>Item 2</span></div> <div id="item_3"> <span>Item 3</span></div> </div> </div> <div id="block_2"> <h2>Block 2</h2> <div class="items_sortable connectedSortable"> <div id="item_4"> <span>Item 4</span></div> <div id="item_5"> <span>Item 5</span></div> <div id="item_6"> <span>Item 6</span></div> </div> </div> </div> <script> $("#blocks_sortable").sortable({ }); $(".items_sortable").sortable({ connectWith: '.connectedSortable' , forcePlaceholderSize: true , stop : function(event, ui){ alert("I am in block = "+$(this).parent().attr("id")); } }).disableSelection(); </script> Thank you.

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  • How to center text in an inline-block span on lte firefox 2?

    - by Knu
    I have 3 spans inside a div. text-align:center isn't working (tried on the parent too) text-align: -moz-center neither (on ff2) i have to use spans no floats -moz-inline-box or -moz-inline-stack ? with -moz-inline-block it's working but the 2nd and 3rd spans clear left… Anyone got an idea? (fixing #6 is an alternative)

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  • C++ iterators, default initialization and what to use as an uninitialized sentinel.

    - by Hassan Syed
    The Context I have a custom template container class put together from a map and vector. The map resolves a string to an ordinal, and the vector resolves an ordinal (only an initial string to ordinal lookup is done, future references are to the vector) to the entry. The entries are modified intrusively to contain a a bool "assigned" and an iterator_type which is a const_iterator to the container class's map. My container class will use RCF's serialization code (which models boost::serialization) to serialize my container classes to nodes in a network. Serializing iterator's is not possible, or a can of worms, and I can easily regenerate them onces the vectors and maps are serialized on the remote site. The Question I need to default initialize, and be able to test that the iterator has not been assigned to (if it is assigned it is valid, if not it is invalid). Since map iterators are not invalidated upon operations performed on it (unless of course items are removed :D) am I to assume that map<x,y>::end() is a valid sentinel (regardless of the state of the map -- i.e., it could be empty) to initialize to ? I will always have access to the parent map, I'm just unsure wheather end() is the same as the map contents change. I don't want to use another level of indirection (--i.e., boost::optional) to achieve my goal, I'd rather forego compiler checks to correct logic, but it would be nice if I didn't need to. Misc This question exists, but most of its content seems non-sense. Assigning a NULL to an iterator is invalid according to g++ and clang++. This is another similar question, but it focuses on the common use-cases of iterators, which generally tends to be using the iterator to iterate, ofcourse in this use-case the state of the container isn't meant to change whilst iteration is going on.

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  • Why does my array initialization code cause a StackOverflowException to be thrown?

    - by MCS
    The following line of code in my class constructor is throwing a StackOverflowException: myList = new string[]{}; // myList is a property of type string[] Why is that happening? And what's the proper way to initialize an empty array? UPDATE: The cause was in the set method, in which I was attempting to trim all values. What's wrong with this code: set { for (int i = 0; i < myList.Length; i++) { if (myList[i] != null) myList[i] = myList[i].Trim(); } }

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  • Where is the best place to run initialization code for a UITabBarController?

    - by bobobobo
    I have a UITabBarController in my application. I have to perform some customization to the NIB file using code the first time a view embedded in that UITabBarController gets loaded. When applicationDidFinishLaunching occurs, the UITabBarController's views apparently are not loaded -- if I try to modify the view controllers inside a tab bar that the tab bar is to load in applicationDidFinishLaunching, then those changes are ignored. I'm assuming this is because the tab bar didn't finish loading yet. So, I need a good place to put code that will run immediately after a tabbar is fully ready -- i.e. after it has loaded all the views from their respective nib files. I'm finding the only place I can do this is to track the first time viewDidAppear on each individual view controller. Note I can't use viewWillAppear because I need the value of tabBarController.selectedIndex to be accurate, and it is only actually updated after viewDidAppear gets fired, not when viewWillAppear gets fired.

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  • why does Visual Studio not enforce try-catch-block implementation?

    - by Pedro
    Coming from Eclipse/Java, I noticed that in VisualStudio/C# it is not mandatory to care about Exceptions. While Eclipse forces the user to implement a try-catch-block or to add a throws declaration, this is not the case in Visual Studio. What is the reason Visual Studio doesn't inform about unhandled exceptions? Can I configure Visual Studio to force me to implement try-catch-blocks, or at least add a compiler-warning?

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  • Logging Application Block doesn't add log entries to Event Viewer on machines other than that on whi

    - by Neo
    I am using the Logging Application Block (of Microsoft Enterprise Library 5.0) to log exceptions in the Event Viewer that occur in my WPF XBAP application. However, exceptions are only being logged if the application is run on my machine (the machine it was built on). Any other machine it doesn't log anything. I've tried to find a reason why this might be occurring - I've tried setting requirePermission to false - but to no avail. Anyone any ideas on why this might be happening?

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