o_18ufhmfmq19t513t3lgmn5l1qa8a.pdf

More documents

Recommendations

Info

CHAPTER 25 ■ PROJECT 6: REMOTE EDITING WITH CGI 475 text = form.getvalue('text', open('simple_edit.dat').read()) f = open('simple_edit.dat', 'w') f.write(text) f.close() print """Content-type: text/html A Simple Editor %s """ % text When accessed through a Web server, the CGI script checks for an input value called text. If such a value is submitted, the text is written to the file simple_edit.dat. The default value is the file’s current contents. Finally, a Web page (containing the field for editing and submitting the text) is shown. A screenshot of this page is shown in Figure 25-1. Figure 25-1. The simple_edit.cgi script in action
476 CHAPTER 25 ■ PROJECT 6: REMOTE EDITING WITH CGI Second Implementation Now that you’ve gotten the first prototype on the road, what’s missing? The system should be able to edit more than one file, and it should use password protection. (Because the document can be viewed by opening it directly in a browser, you won’t be paying much attention to the viewing part of the system.) The main difference from the first prototype is that you’ll split the functionality into several scripts—one for each “action” your system should be able to perform: index.html: This isn’t a script. It’s just a plain Web page with a form where you can enter a file name. It also has an Open button, which triggers edit.cgi. edit.cgi: Displays a given file in a text area; has a text field for password entry and a Save button, which triggers save.cgi. save.cgi: Saves the text it receives to a given file and displays a simple message (for example, “The file has been saved”). This script should also take care of the password checking. index.html The file index.html is an HTML file that contains the form used to enter a file name: File Editor File name: Note how the text field is named “filename”—that ensures its contents will be supplied as the CGI parameter filename to the edit.cgi script (which is the action attribute of the form tag). If you open this file in a browser, enter a file name in the text field, and click Open, the edit.cgi script will be run. edit.cgi The page displayed by edit.cgi should include a text area containing the current text of the file you’re editing, and a text field for entering a password. The only input needed is the file name, which the script receives from the form in index.html. Note, however, that it is fully possible to open the edit.cgi script directly, without submitting the form in index.html. In that case, you have no guarantee that the filename field of cgi.FieldStorage is set. So you have to add a check to ensure that there is a file name. If there is, the file will be opened from a directory that contains the files that may be edited. Let’s call the directory data. (You will, of course, have to create this directory.)
Page 2 and 3:
Beginning Python From Novice to Pro
Page 4:
For Ranveig
Page 7 and 8:
■CHAPTER 23 Project 4: In the New
Page 9 and 10:
viii ■CONTENTS Strings . . . . .
Page 11 and 12:
x ■CONTENTS ■CHAPTER 5 Conditio
Page 13 and 14:
xii ■CONTENTS ■CHAPTER 8 Except
Page 15 and 16:
xiv ■CONTENTS ■CHAPTER 11 Files
Page 17 and 18:
xvi ■CONTENTS Dynamic Web Pages w
Page 19 and 20:
xviii ■CONTENTS ■CHAPTER 20 Pro
Page 21 and 22:
xx ■CONTENTS Second Implementatio
Page 23 and 24:
xxii ■CONTENTS Preparations . . .
Page 26:
About the Technical Reviewer ■JER
Page 30 and 31:
Introduction A C program is like a
Page 32 and 33:
CHAPTER 1 ■ ■ ■ Instant Hacki
Page 34 and 35:
CHAPTER 1 ■ INSTANT HACKING: THE
Page 36 and 37:
Page 38 and 39:
Page 40 and 41:
Page 42 and 43:
Page 44 and 45:
Page 46 and 47:
Page 48 and 49:
Page 50 and 51:
Page 52 and 53:
Page 54 and 55:
Page 56 and 57:
Page 58 and 59:
Page 60 and 61:
Page 62 and 63:
CHAPTER 2 ■ ■ ■ Lists and Tup
Page 64 and 65:
CHAPTER 2 ■ LISTS AND TUPLES 33 I
Page 66 and 67:
CHAPTER 2 ■ LISTS AND TUPLES 35 A
Page 68 and 69:
CHAPTER 2 ■ LISTS AND TUPLES 37 >
Page 70 and 71:
CHAPTER 2 ■ LISTS AND TUPLES 39 M
Page 72 and 73:
CHAPTER 2 ■ LISTS AND TUPLES 41 T
Page 74 and 75:
CHAPTER 2 ■ LISTS AND TUPLES 43 L
Page 76 and 77:
CHAPTER 2 ■ LISTS AND TUPLES 45 W
Page 78 and 79:
CHAPTER 2 ■ LISTS AND TUPLES 47
Page 80 and 81:
CHAPTER 2 ■ LISTS AND TUPLES 49 a
Page 82 and 83:
CHAPTER 2 ■ LISTS AND TUPLES 51 S
Page 84 and 85:
CHAPTER 3 ■ ■ ■ Working with
Page 86 and 87:
CHAPTER 3 ■ WORKING WITH STRINGS
Page 88 and 89:
Page 90 and 91:
Page 92 and 93:
Page 94 and 95:
Page 96 and 97:
Page 98 and 99:
CHAPTER 4 ■ ■ ■ Dictionaries:
Page 100 and 101:
CHAPTER 4 ■ DICTIONARIES: WHEN IN
Page 102 and 103:
Page 104 and 105:
Page 106 and 107:
Page 108 and 109:
Page 110:
Page 113 and 114:
82 CHAPTER 5 ■ CONDITIONALS, LOOP
Page 115 and 116:
Page 117 and 118:
Page 119 and 120:
Page 121 and 122:
Page 123 and 124:
Page 125 and 126:
Page 127 and 128:
Page 129 and 130:
Page 131 and 132:
100 CHAPTER 5 ■ CONDITIONALS, LOO
Page 133 and 134:
Page 135 and 136:
Page 137 and 138:
Page 139 and 140:
Page 141 and 142:
110 CHAPTER 6 ■ ABSTRACTION But w
Page 143 and 144:
112 CHAPTER 6 ■ ABSTRACTION ■Ti
Page 145 and 146:
114 CHAPTER 6 ■ ABSTRACTION Can I
Page 147 and 148:
116 CHAPTER 6 ■ ABSTRACTION stora
Page 149 and 150:
118 CHAPTER 6 ■ ABSTRACTION 4. Yo
Page 151 and 152:
120 CHAPTER 6 ■ ABSTRACTION The p
Page 153 and 154:
122 CHAPTER 6 ■ ABSTRACTION >>> p
Page 155 and 156:
124 CHAPTER 6 ■ ABSTRACTION Also,
Page 157 and 158:
126 CHAPTER 6 ■ ABSTRACTION Feel
Page 159 and 160:
128 CHAPTER 6 ■ ABSTRACTION ■No
Page 161 and 162:
130 CHAPTER 6 ■ ABSTRACTION So yo
Page 163 and 164:
132 CHAPTER 6 ■ ABSTRACTION numer
Page 165 and 166:
134 CHAPTER 6 ■ ABSTRACTION LAMBD
Page 167 and 168:
136 CHAPTER 6 ■ ABSTRACTION In th
Page 169 and 170:
138 CHAPTER 6 ■ ABSTRACTION Scope
Page 171 and 172:
140 CHAPTER 7 ■ MORE ABSTRACTION
Page 173 and 174:
Page 175 and 176:
Page 177 and 178:
Page 179 and 180:
Page 181 and 182:
Page 183 and 184:
Page 185 and 186:
Page 187 and 188:
Page 189 and 190:
Page 191 and 192:
160 CHAPTER 8 ■ EXCEPTIONS >>> im
Page 193 and 194:
162 CHAPTER 8 ■ EXCEPTIONS Custom
Page 195 and 196:
164 CHAPTER 8 ■ EXCEPTIONS More T
Page 197 and 198:
166 CHAPTER 8 ■ EXCEPTIONS try: x
Page 199 and 200:
168 CHAPTER 8 ■ EXCEPTIONS Invali
Page 201 and 202:
170 CHAPTER 8 ■ EXCEPTIONS If you
Page 204 and 205:
CHAPTER 9 ■ ■ ■ Magic Methods
Page 206 and 207:
CHAPTER 9 ■ MAGIC METHODS, PROPER
Page 208 and 209:
Page 210 and 211:
Page 212 and 213:
Page 214 and 215:
Page 216 and 217:
Page 218 and 219:
Page 220 and 221:
Page 222 and 223:
Page 224 and 225:
Page 226 and 227:
Page 228 and 229:
Page 230 and 231:
Page 232 and 233:
Page 234 and 235:
CHAPTER 10 ■ ■ ■ Batteries In
Page 236 and 237:
CHAPTER 10 ■ BATTERIES INCLUDED 2
Page 238 and 239:
Page 240 and 241:
Page 242 and 243:
Page 244 and 245:
Page 246 and 247:
Page 248 and 249:
Page 250 and 251:
Page 252 and 253:
Page 254 and 255:
Page 256 and 257:
Page 258 and 259:
Page 260 and 261:
Page 262 and 263:
Page 264 and 265:
Page 266 and 267:
Page 268 and 269:
Page 270 and 271:
Page 272 and 273:
Page 274 and 275:
Page 276 and 277:
Page 278 and 279:
Page 280 and 281:
Page 282 and 283:
Page 284:
Page 287 and 288:
256 CHAPTER 11 ■ FILES AND STUFF
Page 289 and 290:
Page 291 and 292:
Page 293 and 294:
Page 295 and 296:
Page 297 and 298:
Page 299 and 300:
Page 301 and 302:
270 CHAPTER 12 ■ GRAPHICAL USER I
Page 303 and 304:
Page 305 and 306:
Page 307 and 308:
Page 309 and 310:
Page 311 and 312:
Page 313 and 314:
Page 316 and 317:
CHAPTER 13 ■ ■ ■ Database Sup
Page 318 and 319:
CHAPTER 13 ■ DATABASE SUPPORT 287
Page 320 and 321:
Page 322 and 323:
Page 324 and 325:
Page 326:
Page 329 and 330:
298 CHAPTER 14 ■ NETWORK PROGRAMM
Page 331 and 332:
Page 333 and 334:
Page 335 and 336:
Page 337 and 338:
Page 339 and 340:
Page 341 and 342:
Page 343 and 344:
Page 345 and 346:
314 CHAPTER 15 ■ PYTHON AND THE W
Page 347 and 348:
Page 349 and 350:
Page 351 and 352:
Page 353 and 354:
Page 355 and 356:
Page 357 and 358:
Page 359 and 360:
Page 361 and 362:
Page 363 and 364:
Page 365 and 366:
Page 367 and 368:
Page 369 and 370:
Page 372 and 373:
CHAPTER 16 ■ ■ ■ Testing, 1-2
Page 374 and 375:
CHAPTER 16 ■ TESTING, 1-2-3 343 W
Page 376 and 377:
CHAPTER 16 ■ TESTING, 1-2-3 345 d
Page 378 and 379:
CHAPTER 16 ■ TESTING, 1-2-3 347 u
Page 380 and 381:
CHAPTER 16 ■ TESTING, 1-2-3 349 F
Page 382 and 383:
CHAPTER 16 ■ TESTING, 1-2-3 351 P
Page 384 and 385:
CHAPTER 16 ■ TESTING, 1-2-3 353 "
Page 386:
CHAPTER 16 ■ TESTING, 1-2-3 355 N
Page 389 and 390:
358 CHAPTER 17 ■ EXTENDING PYTHON
Page 391 and 392:
Page 393 and 394:
Page 395 and 396:
Page 397 and 398:
Page 399 and 400:
Page 401 and 402:
Page 404 and 405:
CHAPTER 18 ■ ■ ■ Packaging Yo
Page 406 and 407:
CHAPTER 18 ■ PACKAGING YOUR PROGR
Page 408 and 409:
Page 410 and 411:
Page 412 and 413:
CHAPTER 19 ■ ■ ■ Playful Prog
Page 414 and 415:
CHAPTER 19 ■ PLAYFUL PROGRAMMING
Page 416 and 417:
Page 418 and 419:
Page 420:
Page 423 and 424:
392 CHAPTER 20 ■ PROJECT 1: INSTA
Page 425 and 426:
Page 427 and 428:
Page 429 and 430:
Page 431 and 432:
Page 433 and 434:
Page 435 and 436:
Page 437 and 438:
Page 439 and 440:
Page 442 and 443:
CHAPTER 21 ■ ■ ■ Project 2: P
Page 444 and 445:
CHAPTER 21 ■ PROJECT 2: PAINTING
Page 446 and 447:
Page 448 and 449:
Page 450 and 451:
Page 452 and 453:
CHAPTER 22 ■ ■ ■ Project 3: X
Page 454 and 455:
CHAPTER 22 ■ PROJECT 3: XML FOR A
Page 456 and 457: CHAPTER 22 ■ PROJECT 3: XML FOR A
Page 468: CHAPTER 22 ■ PROJECT 3: XML FOR A
Page 471 and 472: 440 CHAPTER 23 ■ PROJECT 4: IN TH
Page 486 and 487: CHAPTER 24 ■ ■ ■ Project 5: A
Page 488 and 489: CHAPTER 24 ■ PROJECT 5: A VIRTUAL
Page 504 and 505: CHAPTER 25 ■ ■ ■ Project 6: R
Page 508 and 509: CHAPTER 25 ■ PROJECT 6: REMOTE ED
Page 510 and 511: CHAPTER 25 ■ PROJECT 6: REMOTE ED
Page 512: CHAPTER 25 ■ PROJECT 6: REMOTE ED
Page 515 and 516: 484 CHAPTER 26 ■ PROJECT 7: YOUR
Page 531 and 532: 500 CHAPTER 27 ■ PROJECT 8: FILE
Page 558 and 559:
CHAPTER 29 ■ ■ ■ Project 10:
Page 560 and 561:
CHAPTER 29 ■ PROJECT 10: DO-IT-YO
Page 562 and 563:
Page 564 and 565:
Page 566 and 567:
Page 568 and 569:
Page 570 and 571:
Page 572 and 573:
Page 574 and 575:
Page 576 and 577:
Page 578 and 579:
APPENDIX A ■ ■ ■ The Short Ve
Page 580 and 581:
APPENDIX A ■ THE SHORT VERSION 54
Page 582 and 583:
Page 584 and 585:
Page 586:
Page 589 and 590:
558 APPENDIX B ■ PYTHON REFERENCE
Page 591 and 592:
Page 593 and 594:
Page 595 and 596:
Page 597 and 598:
Page 599 and 600:
Page 601 and 602:
Page 603 and 604:
572 APPENDIX C ■ ONLINE RESOURCES
Page 606 and 607:
Index ■Symbols - operator 558 !=
Page 608 and 609:
■INDEX 577 assertEqual method Tes
Page 610 and 611:
■INDEX 579 cmd module 252, 501 Cm
Page 612 and 613:
■INDEX 581 get method 74-75 has_k
Page 614 and 615:
■INDEX 583 ■F Factory class twi
Page 616 and 617:
■INDEX 585 finding conflicts 197
Page 618 and 619:
■INDEX 587 initialization 38 nami
Page 620 and 621:
■INDEX 589 localtime function tim
Page 622 and 623:
■INDEX 591 nesting blocks 88 Netw
Page 624 and 625:
■INDEX 593 playful programming 38
Page 626 and 627:
■INDEX 595 Python C API 365 hand-
Page 628 and 629:
■INDEX 597 ■S safe_substitute m
Page 630 and 631:
■INDEX 599 split function re modu
Page 632 and 633:
■INDEX 601 TestCase class methods
Page 634 and 635:
■INDEX 603 further exploration 47
Page 641:
forums.apress.com FOR PROFESSIONALS
show all

o_18ufhmfmq19t513t3lgmn5l1qa8a.pdf

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?