Workshop

Quiz

1: To do server push, what functions need to be used from the CGI module?

  1. multipart_start and multipart_end

  2. multipart_init, multipart_start, and multipart_end

  3. push_start and push_end

2: All browsers support client pull because it's part of the HTML standard.

  1. True

  2. False

3: Cache proxies are guaranteed not to cache what kinds of Web pages?

  1. Responses from an HTML form that uses the POST method

  2. Server-pushed content

  3. Any CGI program's output

Answers

A1: b. The multipart_init is used to get the browser ready for a multipart Web pages. The multipart_start and multipart_end mark the beginning and ending of each such page.
A2: b. Quite False. The <META> tags can be ignored by browsers, so says the standard. Also, using the -Refresh option in the header function doesn't guarantee that the browser will reload the page as requested; the browser has the option of ignoring that directive too.
A3: a. The answer was explained in the "Q&A" section.

Activities

  • Modify the hit counter in Listing 23.3 (or 23.4) to keep different counts for various types of browsers. To do this, you'll need a different file for each browser type you will keep track of. Don't forget to keep an extra file around for those browsers that you can't identify.

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