Writing CGI Application with Perl Book

	Foreword	xiii
	Preface	xv
	Acknowledgments	xix
Chapter 1	Perl, CGI, and this Book	1
1.1	What Is Perl?	1
1.2	What Is CGI?	3
1.2.1	Why Perl Is Good for CGI	4
1.3	About this Book	5
1.3.1	Who Is this Book For?	6
1.3.2	Conventions Used in this Book	6
1.3.3	Using perldoc	7
1.4	Using the CPAN	10
Chapter 2	What You Should Know	15
2.1	Prerequisites	15
2.2	Editors	18
2.3	File Permissions	18
2.4	Basic Security Concerns	19
2.5	Using -T	20
2.6	Checking for Taintedness and Laundering Data	22
2.7	Your PATH and -T	27
2.8	Installing a Script	29
2.9	Troubleshooting	32
2.10	Caching	38
2.10.1	The Expires HTTP Header	40
2.10.2	Cache-Control HTTP Header	41
2.11	Listings	42
Chapter 3	Using Your Environment	45
3.1	Introduction to %ENV	45
3.2	Adding to %ENV	48
3.3	Form Input Primer	53
3.4	Example Script: Visitor Log	55
3.5	Example Script: Basic Report	62
3.6	Reader Exercise	65
3.7	What Have We Learned?	66
3.8	Listings	67
Chapter 4	Introduction to Web Forms	69
4.1	Introduction	69
4.2	Form Tags	74
4.3	Reading Form Input with CGI.pm	84
4.4	Making Your Users Happy	92
4.5	Final Example	93
4.6	User Exercises	100
4.7	Program Listings	101
Chapter 5	Working with Cookies	105
5.1	Introduction	105
5.2	Security	106
5.3	Limitations	106
5.4	Cookie Pieces	106
5.5	Working with Cookies the Manual Way	108
5.6	Baking Cookies with CGI.pm	111
5.7	Controlling User Preferences with Cookies	114
5.8	User Exercises	121
Chapter 6	Access Counters	123
6.1	Introduction	123
6.2	Example Script: SSI Text Counter	124
6.3	Example Script: SSI Image Counter	130
6.4	Example Script: SSI Text Counter, with a Twist	133
6.5	Example Script: An Imageless Image Counter	136
6.6	Counter Conclusion	139
6.7	Reader Exercises	140
6.8	Listings	140
Chapter 7	Web-Based File Uploading	143
7.1	Introduction	143
7.2	File Uploading Basics	144
7.3	Viewing Files	160
7.4	Uploading Multiple Files	163
7.5	Reader Exercises	172
7.6	File Listings	173
Chapter 8	Tracking Clicks	181
8.1	Introduction	181
8.2	Example Script: A Simple Click Tracker	182
8.3	Example Script: Random Images	187
8.4	Example Script: Click Tracking (Reprise)	192
8.5	Reader Exercises	193
8.6	Listings	194
Chapter 9	Using mod_perl	197
9.1	What Is mod_perl?	197
9.2	Configuring mod_perl	199
9.3	Apache::Registry	201
9.4	Automatic Headers and Footers with Apache::Sandwich	204
9.5	A mod_perl Photo Album with Apache::Album	209
9.6	Authentication with Apache::AuthDBI	217
9.7	Writing a mod_perl Handler	220
9.8	Reader Exercises	226
9.9	Listings	226
Chapter 10	Web-Based E-mail	229
10.1	Introduction	229
10.2	Example Script: Checking POP3 Mail via the Web	230
10.3	Example Script: Reading E-mail via the Web	244
10.4	Example Script: Displaying Attachments	253
10.5	Example Script: Composing E-mail	256
10.6	Reader Exercises	260
10.7	Listings	261
Chapter 11	Introduction to DBI and Databases on the Web	267
11.1	Introduction	267
11.2	Using the Perl DBI	269
11.3	Connecting to the Database	270
11.3.1	Disconnecting from the Database	271
11.4	Preparing and Executing an SQL Query	272
11.5	Fetching Data	274
11.5.1	The fetchall_arrayref() Method	274
11.5.2	The fetchrow_arrayref() Method	277
11.5.3	The fetchrow_hashref() Method	279
11.5.4	The bind_columns() Method	280
11.6	Putting It All Together	281
11.6.1	The do() Method	286
11.6.2	Wrapping It Up	286
11.7	Reader Exercises	287
11.8	Listings	287
Chapter 12	Tied Variables	293
12.1	Introduction	293
12.2	Setting It All Up	295
12.3	Getting Started	296
12.4	Diving In	297
12.5	The Main Program	307
12.6	Finishing the ShopCart Module	316
12.7	Running the Program	326
12.8	Wrapping It Up	329
12.9	Program Listings	330
Chapter 13	Embedding Perl in HTML with Mason	339
13.1	Introduction	339
13.2	Installation	340
13.3	The Strategy	340
13.4	Mason Syntax	340
13.5	Special Mason Components	344
13.6	Cascading Execution	344
13.7	Moving Right Along	345
13.8	rss2html	350
13.9	my_news	356
13.10	footer	357
13.11	Wrapping It Up: The Code for the Example Site	360
Chapter 14	Document Management via the Web	369
14.1	Introduction	369
14.2	The Plan	370
14.3	auth.cgi	372
14.4	shared.pl	378
14.5	main.cgi	381
14.6	upload.cgi	390
14.7	viewer.cgi	401
14.8	Program Listings	406
Chapter 15	Dynamically Manipulating Images	419
15.1	Introduction	419
15.2	Adding Shapes and Text	420
15.3	Creating a Dynamic Graph	424
15.4	Creating Thumbnail Images	432
15.5	Filtering Images with Image::Magick	436
15.6	Animated Images	442
15.7	Reader Exercises	443
15.8	Listings	444
Chapter 16	RSS And XML	449
16.1	XML and RSS Overview	449
16.1.1	Structure of an XML Document	450
16.2	News Portals with RSS	450
16.2.1	A Home Page News Portal	453
16.3	Creating an RSS File	464
16.4	Reader Exercises	466
16.5	Listings	466
Appendix A	Server Codes	471
	100-199: Provide confirmation that a request is being processed	471
	200-299: Request was performed	471
	300-399: Request not performed	472
	400-499: Request is incomplete	472
	500-599: Internal server errors	474
Appendix B	Environment Variables	475
Appendix C	POSIX::strftime() Formats	477
Appendix D	General Public License	481
Appendix E	Artistic License	489
Appendix F	Perl Documentation	493
Appendix G	ASCII Codes	497
Appendix H	Special HTML Characters	503
	Resources	509
	Index	511