Publication Type. More Filters. View 1 excerpt, cites background. Web server programs are one of the most popular computer applications in existence today. Our goal is to study the behavior of modern Web server application programs to understand how they interact … Expand. Online Sessions through Java Servlets. This paper presents a new, coprocess-based service for servlet-enabled web servers that allows for establishing online client sessions with an interactive program on the server computer.
This … Expand. Two-stage Programming via the Client-servlet-coprocess Interaction Model. This paper presents the client-servlet-coprocess interaction model, a new form of the client-server model. View 2 excerpts, cites background. The continuous growth of the Internet has driven people, all around the globe, to perform transactions on-line, search information or navigate using a browser. As more people feel comfortable using a … Expand.
Characterizing the behavior of Windows NT Web server workloads using processor performance counters. Adapting databases and WebDAV protocol. The pros and cons of Web programming. If several of us give the same feedback, it must probably make some sense.
The -T flag turns on taint mode. I am not sure you intended to do this, or just copied it from somewhere else. Taint mode essentially makes sure that data coming into your program from the outside must be validated before it's being used. That could bite you in the back. This is good! Well done. Your code should always start with strict and warnings.
You are importing a lot of stuff into your namespace, but all you use is param. Instead, consider importing only :cgi , which will give you less stuff, or only import param and header. That also makes it easier to remember where that function came from. If the file is called zero 0 , or , this will fail. Read more about that at the end of this post. While some people like to use logical operators for flow control, this is really weird to read.
If you want concise syntax without blocks, use a post-fix if or unless. Also, provide an error message as to why this failed. It's CGI, so this will show up in your server log. You don't want it to say Died at line 10 , do you? Don't use a GLOB as a file handle. It's global to all of your program, including other modules and namespaces. If another module was to use the same PATH name for a handle, this would conflict.
Instead, use a lexical file handle. This has the added benefit that Perl will take care of closing the handle for you as soon as the variable goes out of scope. In this case, that's when the program ends. So you don't have to use close explicitly. Use the three-argument form of open , where the second argument is the mode. Especially if part of your file name comes from the user and you didn't even untaint it , this is crucial advice.
Don't use binary or for flow control as it has tight binding. Use or instead, which binds very loosely, so you don't need to put the parentheses after open. It will also read more like actual English. Indent your code properly. This looks weird. You have indented the second line 9 spaces.
Looks like one full tab in vim, and one space. Instead, break it around properly, and align everything. Perhaps not even have the content disposition included. So there will be browsers out there that do completely unexpected things based on your code. Be sure to always test in all browsers you want to support. Should work on at least some recent browsers. How about also appending the filename to the script url? The period during which a system is error-free and immune from user input.
I've always had good luck with the following. Back to Seekers of Perl Wisdom. Replies are listed 'Best First'. The Web protocols were designed to identify, via MIME Content-Type headers, what sort of content a data stream has, but not specify exactly what to do with it. Various HTML constructs ware designed to suggest, but not to force. Many people configure their browsers in many different ways so there is no sure method.
Or you can try other methods; mainly a scripting language that might be able to do this for you. You can always encourage the user to make use of browser features to save a file to disk, such as right-clicking in most browsers.
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