Dr. Dobb's Journal - November 2008 - (Page 30)

Core Technology BUILDING YOUR OWN WEB SERVER change the ping command to check your server in your domain. Once you have web content in place and you can ping your server, you should be able to access your website with a browser (Internet Explorer, Firefox, or whatever) by specifying a Universal Resource Locator or URL of the form: http://hostname.domainname Webster2 Hardware Again, Webster2 is based entirely on the NB MOD5270LC development kit hardware. As such, only two things are required to get Webster2 running. First, you need to insert an SD memory card (64-GB max) into the socket on the development board and second. you need to download the web server code I provide (see “Resource Center,” page 5) with this article. While packaging the NB hardware is not required for its operation, I decided to package the development hardware to protect it If you don’t specify a specific HTML file to access, the file index.html is assumed. Once this works, you are good to go. from accidental abuse or damage. At my local electronics shop, I found a plastic box made by Serpac that the hardware would easily fit into; see the complete parts list in Table 1. Because I was going to hide the hardware inside the box, I thought it necessary to mount important controls and indicators on the outside. In the end, I mounted a power switch, power indicator, reset switch, and access indicator on the box; see Figures 1 and 2. The packaging steps I took are as follows: 1. Lay the NB module into the box with the dipswitch facing the front of the box to visualize how things will fit. 2. Remove any of the box’s molded standoffs that are in the way using a drill bit larger in diameter than the standoff. The idea is that the NB hardware should be supported in the box by the acrylic feet attached to the bottom of the printed circuit board (PCB). 3. With the PCB held in place, mark the box with the position of two or more of the PC Presents Bug of the Month #464 WN NE SIO R VE -lint 9.0 for C/C++ #include typedef const char *S; typedef char Player[100]; The football coach wanted to prefix a position indicator before each player, so in this example he would get "QB Joe Jackson". But something went wrong. Can you spot the problem? Visit our web site at www.gimpel.com void asgn_position( Player name, S pos ) { sprintf( name, "%s %s", pos, name ); } int main() { Player player = "Joe Jackson"; asgn_position( player, "QB" ); printf( "%s\n", player ); return 0; } PC-lint for C/C++ will catch this and many other bugs. It will analyze a mixed suite of C and C++ modules to uncover bugs, glitches, quirks and inconsistencies. Introducing Version 9.0: What, you ask, can be added to our ground-breaking lint products -products that already contain interfunction value tracking, auto variable and member value tracking, customizable function semantics, a comprehensive system of message suppression, and a rich set of over 500 Warnings that all together provide an environment in which few bugs can survive and none can flourish? The answer to that question is found in Version 9.0, which provides support for pre-compiled headers, static variable tracking, muti-thread analysis, support for MISRA C 2004 and MISRA C++ 2008, a rich set of program information reports including stack usage, and over 146 new messages. Full Support for ANSI/ISO C and C++. Figure 1: Inside the Webster2 chassis. PC-lint for C/C++ Numerous compilers/libraries supported. Runs on Windows, MSDOS, and OS/2. $389 Call FlexeLint for C/C++ 30 Day Money Back Guarantee The same great product for all UNIX systems. Distributed in shrouded C source form. Gimpel Software Serving the C/C++ Community for 22 Years. CALL TODAY (610) 584-4261 Or FAX (610) 584-4266 www.gimpel.com PC-lint and FlexeLint are trademarks of Gimpel Software 30 Dr. Dobb’s Journal l www.ddj.com l November 2008 Figure 2: The finished Webster2 Web Server From the left are the power switch, the green LED power on indicator, the pushbutton reset switch, and the red access LED. Holes are filed in the rear of the chassis for power supply and network cables to pass through. http://www.gimpel.com http://www.gimpel.com http://www.gimpel.com http://www.ddj.com

Table of Contents Feed for the Digital Edition of Dr. Dobb's Journal - November 2008

Dr. Dobb's Journal - November 2008 Contents Friday Night Fish Fry Alia Vox Developer Diaries Developer's Notebook Saving Open Source Conversations iPhone Building Your Own Web Server Green Telnet What's New In Boost Threads? Testing Service Oriented Architectures Test Case Generation, UML, and Eclipse Unit Testing Web Services C3 Programming The Agile Edge Swaine's Flames Effective Concurrency

Dr. Dobb's Journal - November 2008

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