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dummy text # , but that was before we had much experience with routes This time, although we ll defer the actual pages to Section 1223, we ll make the routes now, as seen in Listing 1219 This code uses the :member method inside a resources block, which we haven t seen before, but see if you can guess what it does

We can test TiniTerm using BlackBox and the null modem con guration shown in Figure 32 BlackBox allows the user to select all necessary parameters to communicate with the terminal program For our purposes select the following settings Data bits: 8 Stop bits: 1 Parity: none Data rate: 115,200

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We re now in a position to start implementing our signin model, namely, remembering user signin status forever and clearing the session only when the user explicitly signs out The signin functions themselves will end up crossing the traditional Model-ViewController lines; in particular, several signin functions will need to be available in both controllers and views You may recall from Section 425 that Ruby provides a module facility for packaging functions together and including them in multiple places, and that s the plan for the authentication functions We could make an entirely new module for authentication, but the Sessions controller already comes equipped with a module,

When you do start getting to the concrete (such as user interface design), try to be visual Draw a rough "screen flow" to help users understand how they're going to interact with the application

Assuming that the data rate selected in BlackBox is 115,200 bps, you can start in your Telnet session using a command similar to the following

namely, SessionsHelper Moreover, helpers are automatically included in Rails views, so all we need to do to use the Sessions helper functions in controllers is to include the module into the Application controller (Listing 911)

class ApplicationController < ActionController::Base protect_from_forgery include SessionsHelper end

Notice that the application is launched as a foreground process (that is, no & at the end of the command) This is important because background processes cannot read from Systemin For background processes, Systemin is fed from a comdalsemicommNullInputStream This allows the Telnet session itself to continue to process characters typed at the prompt, while other processes run in the background In this case, we want the application, TiniTerm, to process all console input If the BlackBox settings and serial cable are correct, you should be able to type data at the Telnet prompt and see the characters echoed at both the Telnet prompt and the BlackBox receive window You should also be able to type characters in the BlackBox transmit window and see them written to the Telnet prompt

By default, all the helpers are available in the views but not in the controllers We need the methods from the Sessions helper in both places, so we have to include it explicitly

3

Prioritize as you go It's good practice to start by talking about a phased approach, which is especially important when you're planning to use one of the interactive development methods described later in this chapter (see the section Project Management) Organize features to be implemented in phase 1, phase 2, and so forth This doesn't mean your list will necessarily be the rollout schedule, but it provides an idea of the priorities

Because HTTP is a stateless protocol, web applications requiring user signin must implement a way to track each user s progress from page to page One technique for maintaining the user signin status is to use a traditional Rails session (via the special session function) to store a remember token equal to the user s id:

This session object makes the user id available from page to page by storing it in a cookie that expires upon browser close On each page, the application can simply call

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