amelieykw

explain the theory of "how to store user passwords securely" with some example code in Python using a Bcrypt library

amelieykw

• Background : SQL Server Authentication + my Python scripts
• Problem : don't want a clear text password stored in the Python scripts
• Requirement : secure the passwords

amelieykw

Cookies and Sessions are inextricably intertwined, and fundamental to creating rich, interactive internet applications.

What we will be covering in this tutorial:

• What is a "cookie"
• What is a "session"
• Setting and reading cookies
• Using sessions
• Troubleshooting
• Further reading

amelieykw

JsonResponse Objects

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Web services are open standard (XML, SOAP, HTTP, etc.) based web applications that interact with other web applications for the purpose of exchanging data.

To summarize, a complete web service is, therefore, any service that −

• Is available over the Internet or private (intranet) networks
• Uses a standardized XML messaging system
• Is not tied to any one operating system or programming language
• Is self-describing via a common XML grammar
• Is discoverable via a simple find mechanism

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SOAP:

• Simple Object Access Protocol
• XML-based messaging protocol for exchanging information among computers
• an application of the XML specification

the initial focus of SOAP is remote procedure calls transported via HTTP.

Other frameworks including CORBA, DCOM, and Java RMI provide similar functionality to SOAP, but SOAP messages are written entirely in XML and are therefore uniquely platform- and language-independent.

SOAP Message Structure

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class ModelChoiceField(**kwargs)[source]

• Default widget: Select
• Empty value: None
• Normalizes to: A model instance.
• Validates that the given id exists in the queryset.
• Error message keys: required, invalid_choice

Allows the selection of a single model object, suitable for representing a foreign key.

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Similar to a one-dimensional array, a two-dimensional array also consists of a sequence of elements. But the elements can be laid out in a rectangular grid rather than a line.

An Example

// "static void main" must be defined in a public class.
public class Main {
    private static void printArray(int[][] a) {
        for (int i = 0; i < a.length; ++i) {
            System.out.println(a[i]);
        }

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An array is a basic data structure to store a collection of elements sequentially.

But elements can be accessed randomly since each element in the array can be identified by an array index.

An array can have one or more dimensions.

Here we start with the one-dimensional array, which is also called the linear array.

amelieykw

• Get Sub List of ArrayList
• Get the index of last occurrence of the element in the ArrayList
• Get element from ArrayList
• Get the index of first occurrence of the element in the ArrayList
• Check whether element exists in ArrayList