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These validators will be applied before the schema. These validators will be applied after the schema. If True, then it is not an error when keys that aren t associated with a validator are present. If True, then keys that aren t associated with a validator are removed. If this is given, then any keys that aren t available but are expected will be replaced with this value (and then validated). This does not override a present .if_missing attribute on validators. NoDefault is a special FormEncode class to mean that no default values have been specified and therefore missing keys shouldn t take a default value. If True, then missing keys will be missing in the result, if the validator doesn t have .if_missing on it already.

It is usually best to keep form schemas together so that you have a single place you can go to update them. It s also convenient for inheritance since you can make new form schemas that build on existing ones. If you put your forms in a model/form.py file, you can easily use them throughout your controllers. However, if you are creating a schema that is going to be used in only one controller, it is often more convenient to keep the schema with the controller. This is what you ll do here. Add the EmailForm schema to the top of the controller. Now that you have added the schema, you need to be able to use it in your controller to validate the submitted form data that comes in via request.params and to convert the validated values from the format in which they are submitted to Python objects that can be used in the controller.

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qDebug() qDebug() qDebug() qDebug() qDebug() qDebug() qDebug() qDebug() }

The first line of the constructor for the AESEncrypter class initializes the cipher object to use AES in CBC mode: public AESEncrypter(SecretKey key) throws Exception { cipher = CiphergetInstance("AES/CBC/PKCS5Padding"); secretKey = key; } It also specifies that PKCS #5 padding should be used If the input to encrypt is not, say, a multiple of 128 bits, it will be padded extra data will be added to the input to force the input to be a multiple of 128 bits While we do not go into the details of PKCS #5 (or other padding schemes), you can read more about the topic in PKCS #5: Password-Based Cryptography Standard, by RSA Laboratories The remaining line in the constructor simply caches the secret key in a data member of the AESEncrypter object We describe the encrypt() and decrypt() methods next Both of them take input and output streams as parameters.

This is very straightforward because each Schema base class (and therefore the EmailForm class) has a to_python() method to handle the validation and conversion If any of the validators fail to be able to convert the data, they raise a special exception type called a formencodeInvalid exception, which contains information about why the validation and conversion failed Let s see it in practice Be sure you ve added the EmailForm schema and import formencode line to the top of the controller file, and then update the submit() action to look like this: def submit(self): schema = EmailForm() try: form_result = schemato_python(dict(requestparams)) except formencodeInvalid, error: responsecontent_type = 'text/plain' return 'Invalid: 'unicode(error) else: return 'Your email is: %s'%form_resultget('email') You ll also need to update the simpleformhtml template to add the date field: <%inherit file="/basehtml" /> <h1>Enter Your E-mail Address</h1> ${hform(h.

"long"; loc.toString( t1, QLocale::LongFormat ); loc.toString( t2, QLocale::LongFormat ); loc.toString( t3, QLocale::LongFormat ); "default"; loc.toString( t1 ); loc.toString( t2 ); loc.toString( t3 );

url_for(controller='formtest', action='submit'), method='get')} <p>E-mail Address: ${htext('email')}</p> <p>Date: ${htext('date')}</p> <p> ${hsubmit('submit', 'Submit')}</p> ${hend_form()} </form> This new template is much simpler, but you ll notice that it doesn t contain any logic for setting the value of the e-mail field or displaying an error message This will be handled separately using HTML Fill, which I ll discuss later in the chapter If the values entered in the form are valid, the schema s to_python() method returns a dictionary of the validated and coerced data, in this case assigned to form_result This means you can guarantee that the form_result dictionary contains values that are valid and correct Python objects for the data types desired In this case, the e-mail address is a string, so requestparams['email'] happens to be the same as form_result['email'], but for the date field, request.

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