Beginning Python - From Novice to Professional

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CHAPTER 25 ■ PROJECT 6: REMOTE EDITING WITH CGI 481 3. Edit the file to taste, enter the password (one you’ve set yourself, or the one used in the example, which is “foobar”), and click Save. Your browser should then contain the output of the save.cgi script, which is simply the message “The file has been saved.” 4. If you want to verify that the file has been modified, you may repeat the process of opening the file (Steps 1 and 2). Further Exploration With the techniques shown in this project, you can develop all kinds of Web systems. Some possible additions to the existing system are as follows: • Version control: Save old copies of the edited file so you can “undo” your changes. • Add support for user names so you know who changed what. • Add file locking (for example, with the fcntl module) so two users can’t edit the file at the same time. • Add a view.cgi script that automatically adds markup to the files (like the one in Chapter 20). • Make the scripts more robust by checking their input more thoroughly and adding more user-friendly error messages. • Avoid printing a confirmation message like “The file has been saved.” You can either add some more useful output, or redirect the user to another page/script. Redirection can be done with the Location header, which works like Content-type. Just add Location: followed by a space and a URL to the header section of the output (before the first empty line). In addition to expanding the capabilities of this CGI system, you might want to check out some more complex Web environments for Python (as discussed in Chapter 15). What Now? Now you’ve tried your hand at writing CGI scripts. In the next project, you expand on that by using an SQL database for storage. With that powerful combination, you’ll implement a fully functional Web-based bulletin board.
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Beginning Python From Novice to Pro
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For Ranveig
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■CHAPTER 23 Project 4: In the New
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viii ■CONTENTS Strings . . . . .
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x ■CONTENTS ■CHAPTER 5 Conditio
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xii ■CONTENTS ■CHAPTER 8 Except
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xvi ■CONTENTS Dynamic Web Pages w
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xx ■CONTENTS Second Implementatio
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xxii ■CONTENTS Preparations . . .
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About the Technical Reviewer ■JER
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Introduction A C program is like a
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CHAPTER 1 ■ ■ ■ Instant Hacki
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CHAPTER 3 ■ WORKING WITH STRINGS
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82 CHAPTER 5 ■ CONDITIONALS, LOOP
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110 CHAPTER 6 ■ ABSTRACTION But w
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124 CHAPTER 6 ■ ABSTRACTION Also,
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126 CHAPTER 6 ■ ABSTRACTION Feel
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130 CHAPTER 6 ■ ABSTRACTION So yo
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140 CHAPTER 7 ■ MORE ABSTRACTION
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160 CHAPTER 8 ■ EXCEPTIONS >>> im
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CHAPTER 9 ■ ■ ■ Magic Methods
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CHAPTER 9 ■ MAGIC METHODS, PROPER
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CHAPTER 10 ■ ■ ■ Batteries In
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256 CHAPTER 11 ■ FILES AND STUFF
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270 CHAPTER 12 ■ GRAPHICAL USER I
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CHAPTER 13 ■ ■ ■ Database Sup
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298 CHAPTER 14 ■ NETWORK PROGRAMM
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314 CHAPTER 15 ■ PYTHON AND THE W
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CHAPTER 16 ■ ■ ■ Testing, 1-2
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358 CHAPTER 17 ■ EXTENDING PYTHON
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CHAPTER 18 ■ ■ ■ Packaging Yo
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CHAPTER 18 ■ PACKAGING YOUR PROGR
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CHAPTER 19 ■ ■ ■ Playful Prog
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392 CHAPTER 20 ■ PROJECT 1: INSTA
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CHAPTER 22 ■ ■ ■ Project 3: X
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CHAPTER 22 ■ PROJECT 3: XML FOR A
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548 APPENDIX A ■ THE SHORT VERSIO
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APPENDIX B ■ ■ ■ Python Refer
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APPENDIX B ■ PYTHON REFERENCE 559
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APPENDIX C ■ ■ ■ Online Resou
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APPENDIX C ■ ONLINE RESOURCES 573
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576 ■INDEX interfaces 155-156 met
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578 ■INDEX problem 483 second imp
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580 ■INDEX cookie-cutter code aut
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582 ■INDEX enumerate function 559
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584 ■INDEX one line at a time 264
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586 ■INDEX hasattr function 560 w
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588 ■INDEX ■J Java Swing GUI to
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590 ■INDEX mod_python CGI handler
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592 ■INDEX open function bufferin
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594 ■INDEX pygame module 528, 573
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596 ■INDEX regex module importing
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598 ■INDEX setoutputsize method c
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600 ■INDEX string methods 59-60 f
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602 ■INDEX twisted.internet.react
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604 ■INDEX wx.Panel class SetSize
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Beginning Python - From Novice to Professional

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