Writing high-quality code: 151 suggestions for improving Java programs (Chapter 1: common methods and guidelines for JAVA Development ___ recommendation 1 ~ 5), java151
The reasonable man adapts himself to the world; The unreasonable one persists in trying to adapt the world himself.
People who understand the truth adapt themselves to the world; people who do not know the truth want to adapt the world to th
", that is, through authentication. Then if "$suth" is "1", some important information will be displayed.This code assumes that "$auth" is empty when no value is set, but an attacker can create any global variable and assign a value, and through a method like "http://server/test.php?auth=1", we can spoof this code to convince it that we are already certified.Therefore, in order to improve the security of PHP programs, we cannot trust any variables tha
Analysis of common vulnerability attacks in PHP programsSummary:PHP programs are not solid. With the widespread use of PHP, some hackers do not want to bother with PHP, and attacks by using PHP program vulnerabilities are one of them. In this section, we will analyze the security of PHP in terms of global variables, remote files, file uploads, library files, Session files, data types, and error-prone functi
Terminal windows and tools are often used for graphical operations on the centos system. However, opening these programs on the GUI is often complicated, for example, in a command terminal, sometimes you need to open another program when the original program runs. It is necessary to call out another terminal program. In this case, it is very convenient to set the shortcut key for the terminal command. The following describes how to set the shortcut ke
How to attack Common Vulnerabilities in PHP programs (below ). [Library files] as we discussed earlier, include () and require () are mainly used to support code libraries, because we usually put some frequently used functions into an independent file [library file], as we have discussed earlier, include () and require () are mainly used to support the code library, because we usually put some frequently us
can completely deceive this code to make it believe that we are already certified.
Therefore, in order to improve the security of PHP programs, we cannot trust any variables that are not explicitly defined. If there are a lot of variables in the program, this is a very difficult task.
A common protection method is to check the variables in the array http_get[] or post_vars[], which depends on how we subm
http: // server/test. php? Hello = hi setup = no. Then, not only "$ hello" is created, but "$ setup" is also created.Note: These two methods are the "POST" and "GET" methods we usually call.The following user authentication code exposes the security issues caused by the global variables of PHP:If ($ pass = "hello ")$ Auth = 1;...If ($ auth = 1)Echo "some important information ";?>The above code first checks whether the user's password is "hello". If yes, set "$ auth" to "1" to pass authenticat
, that is, only one thread to request, free memory, there is no thread to coordinate resources between, in order to avoid some chunks of large idle, the common practice is to reduce the type of memory block, increase the reuse rate, which may result in more internal fragmentation, If there is too much free memory, you can restart it directly.As a common memory management library, Tcmalloc may not be able to
strs[] = null;4 client5.m Ethoda ("China", STRs); 5 }That is, let the compiler know that this null value is a string type, the compilation can pass smoothly, also reduce the occurrence of errors.Ahvari Source: http://www.cnblogs.com/selene/This article to study, research and sharing of the main, copyright belongs to the author and the blog Garden, Welcome to reprint, if the text is inappropriate or wrong place also hope the great god you hesitate to point out. If you feel that this
[Transferred from: deep understanding of computer systems, Randal E. Bryant David O 'allaron]
10.11 common memory-related errors in C Programs
For C programmers, managing and using virtual memory can be a difficult and error-prone task. Memory-related errors are the most frightening errors because they are often displayed after a distance from the error source in terms of time and space. Write the wrong
android.mk add common templates for local programs and librariesAndroid add local programs or libraries, which are not related to the path they are located in, only with their configuration files android.mk about. the android.mk file can contain some of the system's public macros. Multiple executable programs, dynami
How to attack common vulnerabilities in PHP programs (II)Translation: analysist (Analyst)Source: http://www.china4lert.orgHow to attack common vulnerabilities in PHP programs (II)Original: Shaun Clowes Analyst [Library files]As we discussed earlier, include () and require () are mainly used to support the code library,
. php" through form input, but directly enters http: // server/test. php? Hello = Hi set... why? /A> $ hello "is created, and" $ setup "is also created.
Note: These two methods are the "post" and "get" methods we usually call.The following user authentication code exposes the security issues caused by the global variables of PHP:
If ($ pass = "hello ")$ Auth = 1;...If ($ auth = 1)Echo "some important information ";?>
The above code first checks whether the user's password is "hello". If y
I have written several software in easy language, and some software has been cracked. It is also normal to think about it. I also cracked other software a few years ago! It is precisely because of my experience in cracking software that I think it is very easy to learn about anti-cracking. Below I will explain some of
Windows batch machine, need to bulk swap programs. Write a script for everyone.net stop sharedaccess (firewall off) del/s d:\*.log d:\*.vbs d:\*.pdb d:\*.vbs d:\*.dmp (delete log) D:CD D:\Newsvrftp 192.168.1.1 (The program is placed in the FTP, WINDOWS2003 is not directly dragged OH) adminadmincd guoyabinget aaa2015-4-16.exe get Xxx2015-4-16.vbsbycopy aaa2015-4-16.exe d:\newsvr\aaa1/ycopy aaa2015-4-16.exe d:\newsvr
that:The subscript {0}, {1} 、、、 of the placeholder are set in the order of one of the keys. whether it is a resource class or a resource file, when it is found is a message, then if a variety of resource files come out together, then finally find which one? in fact, you need to prioritize at this point:the priority of the resource class is greater than the priority of the resource file, followed by the file name with the region identifier greater than the non-identity. message_zh_cn.class > Mes
that "$auth" is empty when no value is set, but that an attacker can create any global variable and assign a value, and by means of a similar "http://server/test.php?auth=1" method, we can completely spoof this code to make it believe that we are authenticated.
Therefore, in order to improve the security of PHP programs, we cannot trust any variables that are not explicitly defined. If there are many variables in the program, this is a very difficu
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