Beginning Perl Web Development - From Novice To Professional (2006)

350 ■I N D E X

storing mail server in environment variable, 119

surviving Slashdot effect, 187 service() method, 141 set_message() function, 37–38 shebang line (#!), 202

shell redirect characters, 74 short-circuited evaluation, 325

Simple Mail Transfer Protocol. See SMTP Simple Object Access Protocol. See SOAP singlevs. double-quoted strings, 288–290 Slashdot web site, 187

SMTP (Simple Mail Transfer Protocol), 118–125

creating SMTP object, 119–120 security with, 133

sending messages in Perl, 122–125 setting hello option, 120

setting subject and other header fields, 123–124

specifying localaddr(), localport(), and port options, 121

timeout value for server, 121

SOAP (Simple Object Access Protocol) about, 137–138

about SOAP::Lite, 139 defined, 137

setting up SOAP objects, 140–142 web sites with SOAP interfaces, 139

SOAP listener, 146–148 SOAP::Lite

about, 139

calling methods, 142–144

calling National Weather Service SOAP service, 149–152

calling SOAP server, 148–149 creating SOAP listener, 146–148 documentation for, 142

error handling, 144–145 importing and debugging, 139–140

printing ISBN search results, 143–144 security for SOAP web services, 152 setting types and names, 145–146 setting up SOAP object in, 140–142 traceable events in, 140

using autodispatch, 144 SOAP::Transport::HTTP module, 148 SOAP-based web services, 137–152 special variables, 313

SQL (Structured Query Language) creating HTML table for output, 67–69 logging queries, 70

outputting statements to HTML, 65–67

:standard group, 6 standards for cookies, 17 state() method, 55

statement handles about, 53–54 defined, 50

using binding parameters in, 63 statements

sanitizing with quote() method, 71 statement blocks and, 284

status codes in HTTP, 92 status line, 91

STDERR filehandle, 73–74, 75 STDIN filehandle, 73–74 STDOUT filehandle, 73–74 stream-based parsing

about, 165, 166 XML::SAX for, 172

string operators, 302–306 strings, 288–291

alternative delimiters for, 291 comparing, 318–319

converting between numbers and, 292–293

creating quotes with q// and qq//, 290–291

singlevs. double-quoted, 288–290 string comparison operators, 305, 318 string value comparisons, 304–306

submitting web forms, 100–101 subrequests, 278

suEXEC feature, 73, 85 SWITCH conditionals, 253 Sybase, 51

syntax

expression modifier, 324–325 if statement, 315

Mason, 269–278

Mason component, 271–272 operation, 308

request line, 91

Template Toolkit, 234, 240–257 while loop, 326

syntax checks, 28

system() function, 84, 85, 86 system interaction, 73–86

based on environment variables, 45–46

with CGI scripts, 26–27 closing filehandles, 76 defined, 73

executing system processes from Perl, 84–85

filehandles for, 73–74 obtaining directory listings, 77 opening filehandles, 74–75 Perl script permissions and, 73 protecting temporary files, 83

security considerations with, 85–86 trapping errors with die(), 75

352 ■I N D E X

logging based on, 229

printing from headers_in() output, 219–220

User Datagram Protocol (UDP), 128 user() method, 111

usernames

database security for stored, 70–71 setting up for POP3 servers, 111

■V

values

comparing string, 304–306 viewing variable, 313–315

variables, 306–313 about, 306

autoincrement and autodecrement, 308–310

checking tainted use of, 33

declaring with leading underscore, 245 defined, 285

defining and setting for templates, 244–245

FOREACH directive with loop, 250 interpolating, 313–315 interpolating $, 242

lexical, 310–312

mathematical operations on template, 245–246

modifying, 306–308 names of, 313 special, 313

syntax for operating and assigning at once, 308

testing definitions with if statements, 320 virtual methods for manipulating, 246

verbose output, 28 versions

CGI module, 4–5 RSS, 153, 159

viewing

environment variables in CGI script, 23–24 name_value pairs with headers_in()

method, 218–219 virtual methods, 246

■W

warnings on shebang line, 202 web forms. See forms

web servers

setting timeouts, 98–99

support for HEAD method by, 94

Web Service Definition Language (WSDL), 138

web sites. See also templates

building from template, 257, 259–261 building web page, 278–279 controlling browser redirects, 99

converting to Mason, 233

creating site configuration file with Template Toolkit, 257–259

Mason for, 263–264 mirroring, 102

password and username authentication for, 101–102

removing HTML tags from page, 103–104 sending additional header lines to pages,

99

setting additional parameters for get() function, 98

setting web page timeouts, 98–99 SOAP interfaces used by, 139 updating with ttree program, 236–240

while <STDIN> behavior, 327–328 WHILE directives, 252

while loops about, 326–327 infinite, 329

using while as statement modifier, 332–333

while <STDIN> behavior, 327–328 white space in Perl programs, 285 wildcard hosts (%)

defined, 59

pushing query results into array to find, 59–60

WRAPPER directives, 248 writing

error logs, 227–229 to filehandles, 76

first Perl program, 283–285 RSS, 159–162

WSDL (Web Service Definition Language), 138 -w option, 28

■X

-X file tests, 76–77

XML (eXtensible Markup Language). See also SOAP::Lite; XML::RSS module

creating SAX2 handler package for parsing, 176–177

parsing considerations in, 166 security with parsing, 180 SOAP and, 137

stream-based parsing, 165–166 tree-based parsing, 166, 179–180 XML::SAX for parsing, 172–179 XML::Simple for parsing, 166–168

XML::Grove, 179 XML::LibXML::SAX::Parser, 172 XML::Parser, 179 XML::RSS::Feed module, 163 XML::RSS module

debugging RSS scripts, 158–159, 163 parsing RSS feeds, 155–157, 163

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