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Using the TLS transport directly provides you with absolute control over all aspects of the communication, but as you can see, it also requires a lot of code. In cases where such a fine degree of control is unnecessary (for example, any time you don t have to worry about constructing complex POST requests or specifying short timeouts), the built-in https:// wrapper provides the same functionality as demonstrated in the tlsGetDemo.php example, with quite a bit less effort on your part. Again, PHP 4.3.0 and above supports the https:// wrapper only if PHP has been compiled with OpenSSL support. If you are using the https:// wrapper, the stream itself provides access to the content of the resource, and the returned headers are stored in the (with HTTP instead of HTTPS, slightly misnamed) $http_response_header variable, which is accessible with the stream_get_meta_data() function. We demonstrate here using PHP to read the contents of a remote file, where the server is accessed with an SSL connection (that is, using a Certificate). This code can be found also as httpsDemo.php in the 16 folder of the downloadable archive of code for Pro PHP Security at http://www.apress.com. < php header( 'Content-Type: text/plain' ); $httpsUri = 'https://localhost/index.html'; // create a context $options = array( 'http' => array( 'user_agent' => 'sslConnections.php' ), 'ssl' => array( 'allow_self_signed' => TRUE ) ); $context = stream_context_create( $options );

Browser Step 1 <form action=".../step1.xhtml" ...> Next 4: The user clicks the Next button. 3: Response is sent.

The f:validateDoubleRange element registers a DoubleRangeValidator instance for a UIComponent. Table F-14 lists the element s attributes. Table F-14. f:validateDoubleRange Attributes

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// open a stream via HTTPS $stream = @fopen( $httpsUri, 'r', FALSE, $context ); if ( !$stream ) exit( "Could not open $httpsUri" ); print "Successfully opened $httpsUri; results are shown below\r\n\r\n"; print "Resource:\r\n"; // get resource $resource = stream_get_contents( $stream ); print_r( $resource ); print "\r\n"; print "Metadata:\r\n"; // look at the metadata $metadata = stream_get_meta_data( $stream ); print_r( $metadata ); // free the stream fclose( $stream ); > This script is straightforward You want to view a remote file using a secure connection, so you set variables to contain the fully qualified URI of the file and the options that the connection will use In order to set the options, you need to create a PHP context resource that holds the options As we mentioned before, when you create a context, you pass an array of options to stream_context_create().

ValExpr evaluating to Double ValExpr evaluating to Double ValExpr evaluating to javax. faces.validator. DoubleRangeValidator

5: The action U is copied to the RL location bar. Browser .../step1.xhtml Step 2 Next Finish 7: Response is sent.

This is actually an associative array of associative arrays, one array of options for each wrapper or transport being used in the stream So you create an array with two arrays of options, one for the HTTPS wrapper and one for the SSL transport underneath it In the HTTPS options, you set the User-Agent string to use (not because this is particularly important, but for demonstration purposes, just because you can), and in the SSL options you tell the system to accept a self-signed Certificate You then open a stream using the fopen() function, in read-only mode and without using the include path, and suppressing display of any errors (which could be a security risk, exposing for example your file structure to an attacker) with the @ operator.

Maximum value allowed for this component Minimum value allowed for this component An instance of the DoubleRangeValidator class

Figure 8 5. Why URL and content are mismatched This is quite confusing to the user. In addition, if the user tries to reload/refresh the page, the browser will try to submit the form to step1.xhtml again. This is probably not what she wants. Instead, all she wants maybe is to reload step2.xhtml. Can these problems be fixed Yes. You can tell the JSF navigation system to send a so called redirect response to the browser (see Figure 8 6). Usually a response contains HTML to be displayed in the browser, but a redirect response is different; it doesn t con tain any HTML code. Instead, it simply contains a URL. In this case, it contains the URL for step2.xhtml and tells the browser to go there. The browser will then update the URL in the location bar for step2.xhtml and send a request for step2.xhtml. Finally, step2.xhtml will generate a response, so you ll see step 2 in the browser window and in the location bar.

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