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Tables of Contents for Perl and Lwp
Chapter/Section Title
Page #
Page Count
Foreword
ix
Preface
xi
Introduction to Web Automation
1
14
The Web as Data Source
1
2
History of LWP
3
1
Installing LWP
4
5
Words of Caution
9
1
LWP in Action
10
5
Web Basics
15
16
URLs
15
2
An HTTP Transaction
17
2
LWP::Simple
19
5
Fetching Documents Without LWP::Simple
24
1
Example: Alta Vista
25
2
HTTP POST
27
1
Example: Babelfish
28
3
The LWP Class Model
31
17
The Basic Classes
31
1
Programming with LWP Classes
32
1
Inside the do GET and do POST Functions
33
1
User Agents
34
8
HTTP::Response Objects
42
5
LWP Classes: Behind the Scenes
47
1
URLs
48
10
Parsing URLs
48
6
Relative URLs
54
1
Converting Absolute URLs to Relative
55
2
Converting Relative URLs to Absolute
57
1
Forms
58
27
Elements of an HTML Form
59
1
LWP and GET Requests
59
3
Automating Form Analysis
62
2
Idiosyncrasies of HTML Forms
64
6
POST Example: License Plates
70
4
POST Example: ABEBooks.com
74
7
File Uploads
81
3
Limits on Forms
84
1
Simple HTML Processing with Regular Expressions
85
15
Automating Data Extraction
85
2
Regular Expression Techniques
87
4
Troubleshooting
91
2
When Regular Expressions Aren't Enough
93
1
Example: Extracting Links from a Bookmark File
93
3
Example: Extracting Links from Arbitrary HTML
96
2
Example: Extracting Temperatures from Weather Underground
98
2
HTML Processing with Tokens
100
19
HTML as Tokens
100
1
Basic HTML::TokeParser Use
101
4
Individual Tokens
105
2
Token Sequences
107
5
More HTML::TokeParser Methods
112
5
Using Extracted Text
117
2
Tokenizing Walkthrough
119
13
The Problem
119
1
Getting the Data
120
1
Inspecting the HTML
121
1
First Code
122
1
Narrowing In
123
2
Rewrite for Features
125
6
Alternatives
131
1
HTML Processing with Trees
132
16
Introduction to Trees
132
1
HTML::TreeBuilder
133
4
Processing
137
5
Example: BBC News
142
3
Example: Fresh Air
145
3
Modifying HTML with Trees
148
17
Changing Attributes
148
4
Deleting Images
152
1
Detaching and Reattaching
153
3
Attaching in Another Tree
156
5
Creating New Elements
161
4
Cookies, Authentication, and Advanced Requests
165
13
Cookies
165
4
Adding Extra Request Header Lines
169
3
Authentication
172
3
An HTTP Authentication Example: The Unicode Mailing Archive
175
3
Spiders
178
21
Types of Web-Querying Programs
178
2
A User Agent for Robots
180
1
Example: A Link-Checking Spider
181
16
Ideas for Further Expansion
197
2
A. LWP Modules
199
4
B. HTTP Status Codes
203
2
C. Common MIME Types
205
2
D. Language Tags
207
2
E. Common Content Encodings
209
2
F. ASCII Table
211
13
G. User's View of Object-Oriented Modules
224
11
Index
235