Foundations of Python Network Programming

source code, 218
submit_form() method, 221
robots.txt files, 213
scrape_with_lxml() function, 217
scrape_with_soup() function, 217
spider programs, 213
split() and strip() methods, 218
Terms of Service, 212
tidy program, 217
Web Server Gateway Interface (WSGI)
concentric WSGI wrappers, 171
hostnames, 179–180
HTTP response codes, 178
implementation, 170
low-level socket code, 178
parameters, 170
paths, 179–180
pip installation tool, 180
simple Python function, 170
verbose coding style, 179
WebOb/Web Object library, 180
Werkzeug, 181
World Wide Web
Bottle, 210
Django application, 210
commands, 210
cross-site scripting, 209
CSRF protection, 209
definition, 206
features, 206–207
HTTP POST data, 207
models.py file, 207
ORM, 207
@require_http_methods() call, 209
SQLAlchemy, 208
template tags, 210
urls.py file, 208
views.py file, 208–209
fetchall() method, 192
Flask application, 210
app_insecure.py, 192–193
base.html, 197
HTML templates, 194
Jinja2 template, 195–196
login() and logout() pages, 194
pay() page, 194
Python web application, 194
forms and HTTP methods, 197

app_improved.py payments, 204

cross-site request forgery, 203

GET request, 197

misuse HTTP methods, 199

nonpersistent

cross-site scripting, 201

persistent cross-site scripting, 203

POST/PUT/DELETE method, 197

PyCon scholarships, 198

redirect() constructor, 198

safe and unsafe cookies, 199

techniques, 198

HTML

blanket approach, 188

<br> tag, 188

core standards and resources, 188

CSS and JavaScript, 188

definition, 188

<div>/<span> tag, 188

features, 189

Google Chrome, 189–190

Inspect Element, 190

list element, 188

hypermedia, 183

open_database() function, 191

Pyramid, 211

row.credit and row.dollars, 192

SQLite database, 191

Tornado, 210

URLs

address bar, 183

features, 184

fragment, 184

parsing and building, 184

query string, 184

relative URLs, 186–187

URNs, 184

web scraping (see Web scraping)

WebSockets, 211

wrap_socket() method, 100

„„„„„„„„„X, Y

xpath() method, 218

„„„„„„„„„Z

Zero Message Queue, 144

■ index

357