Noemi  Sanford

Noemi Sanford

1603766998

Using Axios' Proxy Option

Axios supports a proxy option that lets you define an HTTP proxy for your request. A proxied request is an HTTP request that Axios sends to a different server (the proxy server) than the request is actually meant for. The idea is that the proxy server will do something with the request before sending it to where the request is meant to go.

Below is the basic syntax of how you can proxy a request that is meant for httpbin.org to a proxy server listening on localhost:3000.

const axios = require('axios');
const res = await axios.get('http://httpbin.org/get?answer=42', {
  // `proxy` means the request actually goes to the server listening
  // on localhost:3000, but the request says it is meant for
  // 'http://httpbin.org/get?answer=42'
  proxy: {
    host: 'localhost',
    port: 3000
  }
});
console.log(res.data);

How A Proxied Request Works on the Server

Let’s take a look at the technical details of a proxied request. The http-proxy npm package is a popular HTTP proxy. Here’s a script that listens on port 3000 and prints any requests before sending them out to their intended destination.

const express = require('express');
const httpProxy = require('http-proxy');

// Create a proxy and listen on port 3000
const proxy = httpProxy.createProxyServer({});
const app = express();
app.get('*', function(req, res) {
  // Prints "Request GET https://httpbin.org/get?answer=42"
  console.log('Request', req.method, req.url);
  proxy.web(req, res, { target: `${req.protocol}://${req.hostname}` });
});
const server = await app.listen(3000);

const axios = require('axios');
const res = await axios.get('http://httpbin.org/get?answer=42', {
  // `proxy` means the request actually goes to the server listening
  // on localhost:3000, but the request says it is meant for
  // 'http://httpbin.org/get?answer=42'
  proxy: {
    host: 'localhost',
    port: 3000
  }
});
console.log(res.data);

Notice that Express reports req.url is an httpbin.org URL! That’s what we mean when we say Axios sends the request to a different server than the request is intended for. The URL associated with the request, req.url, is different than the proxy server’s URL, and the proxy server is responsible for forwarding the request to req.url.

#axios #programming #developer #web-development

What is GEEK

Buddha Community

Using Axios' Proxy Option

Why Use WordPress? What Can You Do With WordPress?

Can you use WordPress for anything other than blogging? To your surprise, yes. WordPress is more than just a blogging tool, and it has helped thousands of websites and web applications to thrive. The use of WordPress powers around 40% of online projects, and today in our blog, we would visit some amazing uses of WordPress other than blogging.
What Is The Use Of WordPress?

WordPress is the most popular website platform in the world. It is the first choice of businesses that want to set a feature-rich and dynamic Content Management System. So, if you ask what WordPress is used for, the answer is – everything. It is a super-flexible, feature-rich and secure platform that offers everything to build unique websites and applications. Let’s start knowing them:

1. Multiple Websites Under A Single Installation
WordPress Multisite allows you to develop multiple sites from a single WordPress installation. You can download WordPress and start building websites you want to launch under a single server. Literally speaking, you can handle hundreds of sites from one single dashboard, which now needs applause.
It is a highly efficient platform that allows you to easily run several websites under the same login credentials. One of the best things about WordPress is the themes it has to offer. You can simply download them and plugin for various sites and save space on sites without losing their speed.

2. WordPress Social Network
WordPress can be used for high-end projects such as Social Media Network. If you don’t have the money and patience to hire a coder and invest months in building a feature-rich social media site, go for WordPress. It is one of the most amazing uses of WordPress. Its stunning CMS is unbeatable. And you can build sites as good as Facebook or Reddit etc. It can just make the process a lot easier.
To set up a social media network, you would have to download a WordPress Plugin called BuddyPress. It would allow you to connect a community page with ease and would provide all the necessary features of a community or social media. It has direct messaging, activity stream, user groups, extended profiles, and so much more. You just have to download and configure it.
If BuddyPress doesn’t meet all your needs, don’t give up on your dreams. You can try out WP Symposium or PeepSo. There are also several themes you can use to build a social network.

3. Create A Forum For Your Brand’s Community
Communities are very important for your business. They help you stay in constant connection with your users and consumers. And allow you to turn them into a loyal customer base. Meanwhile, there are many good technologies that can be used for building a community page – the good old WordPress is still the best.
It is the best community development technology. If you want to build your online community, you need to consider all the amazing features you get with WordPress. Plugins such as BB Press is an open-source, template-driven PHP/ MySQL forum software. It is very simple and doesn’t hamper the experience of the website.
Other tools such as wpFoRo and Asgaros Forum are equally good for creating a community blog. They are lightweight tools that are easy to manage and integrate with your WordPress site easily. However, there is only one tiny problem; you need to have some technical knowledge to build a WordPress Community blog page.

4. Shortcodes
Since we gave you a problem in the previous section, we would also give you a perfect solution for it. You might not know to code, but you have shortcodes. Shortcodes help you execute functions without having to code. It is an easy way to build an amazing website, add new features, customize plugins easily. They are short lines of code, and rather than memorizing multiple lines; you can have zero technical knowledge and start building a feature-rich website or application.
There are also plugins like Shortcoder, Shortcodes Ultimate, and the Basics available on WordPress that can be used, and you would not even have to remember the shortcodes.

5. Build Online Stores
If you still think about why to use WordPress, use it to build an online store. You can start selling your goods online and start selling. It is an affordable technology that helps you build a feature-rich eCommerce store with WordPress.
WooCommerce is an extension of WordPress and is one of the most used eCommerce solutions. WooCommerce holds a 28% share of the global market and is one of the best ways to set up an online store. It allows you to build user-friendly and professional online stores and has thousands of free and paid extensions. Moreover as an open-source platform, and you don’t have to pay for the license.
Apart from WooCommerce, there are Easy Digital Downloads, iThemes Exchange, Shopify eCommerce plugin, and so much more available.

6. Security Features
WordPress takes security very seriously. It offers tons of external solutions that help you in safeguarding your WordPress site. While there is no way to ensure 100% security, it provides regular updates with security patches and provides several plugins to help with backups, two-factor authorization, and more.
By choosing hosting providers like WP Engine, you can improve the security of the website. It helps in threat detection, manage patching and updates, and internal security audits for the customers, and so much more.

Read More

#use of wordpress #use wordpress for business website #use wordpress for website #what is use of wordpress #why use wordpress #why use wordpress to build a website

Noemi  Sanford

Noemi Sanford

1603766998

Using Axios' Proxy Option

Axios supports a proxy option that lets you define an HTTP proxy for your request. A proxied request is an HTTP request that Axios sends to a different server (the proxy server) than the request is actually meant for. The idea is that the proxy server will do something with the request before sending it to where the request is meant to go.

Below is the basic syntax of how you can proxy a request that is meant for httpbin.org to a proxy server listening on localhost:3000.

const axios = require('axios');
const res = await axios.get('http://httpbin.org/get?answer=42', {
  // `proxy` means the request actually goes to the server listening
  // on localhost:3000, but the request says it is meant for
  // 'http://httpbin.org/get?answer=42'
  proxy: {
    host: 'localhost',
    port: 3000
  }
});
console.log(res.data);

How A Proxied Request Works on the Server

Let’s take a look at the technical details of a proxied request. The http-proxy npm package is a popular HTTP proxy. Here’s a script that listens on port 3000 and prints any requests before sending them out to their intended destination.

const express = require('express');
const httpProxy = require('http-proxy');

// Create a proxy and listen on port 3000
const proxy = httpProxy.createProxyServer({});
const app = express();
app.get('*', function(req, res) {
  // Prints "Request GET https://httpbin.org/get?answer=42"
  console.log('Request', req.method, req.url);
  proxy.web(req, res, { target: `${req.protocol}://${req.hostname}` });
});
const server = await app.listen(3000);

const axios = require('axios');
const res = await axios.get('http://httpbin.org/get?answer=42', {
  // `proxy` means the request actually goes to the server listening
  // on localhost:3000, but the request says it is meant for
  // 'http://httpbin.org/get?answer=42'
  proxy: {
    host: 'localhost',
    port: 3000
  }
});
console.log(res.data);

Notice that Express reports req.url is an httpbin.org URL! That’s what we mean when we say Axios sends the request to a different server than the request is intended for. The URL associated with the request, req.url, is different than the proxy server’s URL, and the proxy server is responsible for forwarding the request to req.url.

#axios #programming #developer #web-development

Autumn  Blick

Autumn Blick

1603805749

What's the Link Between Web Automation and Web Proxies?

Web automation and web scraping are quite popular among people out there. That’s mainly because people tend to use web scraping and other similar automation technologies to grab information they want from the internet. The internet can be considered as one of the biggest sources of information. If we can use that wisely, we will be able to scrape lots of important facts. However, it is important for us to use appropriate methodologies to get the most out of web scraping. That’s where proxies come into play.

How Can Proxies Help You With Web Scraping?

When you are scraping the internet, you will have to go through lots of information available out there. Going through all the information is never an easy thing to do. You will have to deal with numerous struggles while you are going through the information available. Even if you can use tools to automate the task and overcome struggles, you will still have to invest a lot of time in it.

When you are using proxies, you will be able to crawl through multiple websites faster. This is a reliable method to go ahead with web crawling as well and there is no need to worry too much about the results that you are getting out of it.

Another great thing about proxies is that they will provide you with the chance to mimic that you are from different geographical locations around the world. While keeping that in mind, you will be able to proceed with using the proxy, where you can submit requests that are from different geographical regions. If you are keen to find geographically related information from the internet, you should be using this method. For example, numerous retailers and business owners tend to use this method in order to get a better understanding of local competition and the local customer base that they have.

If you want to try out the benefits that come along with web automation, you can use a free web proxy. You will be able to start experiencing all the amazing benefits that come along with it. Along with that, you will even receive the motivation to take your automation campaigns to the next level.

#automation #web #proxy #web-automation #web-scraping #using-proxies #website-scraping #website-scraping-tools

8 Commonly used Pandas display options you should know

Pandas tips and tricks to help you get started with Data Analysis

Pandas is one of the most important libraries for Data Manipulation and Analysis. It not only offers data structure & operations for manipulating data but also prints the result in a pretty tabular form with labeled rows and columns.

In most cases, the default settings of Pandas display should work well, but you may want your data to be displayed in some format that other than its default one. Pandas has an options system that allows you to customize display-related options. Display options can be configured using either methods or attributes as follows:

## Use methods
import pandas as pd

pd.set_option()
pd.get_option()

## Use attributes, for example display max_rows
pd.option.display.max_rows

In this article, we’ll take a look at the 8 commonly used display options. This article is structured as follows:

  1. Showing more rows
  2. Showing more columns
  3. Setting the max characters to be displayed
  4. Setting the precision for float columns
  5. Formating the display for large numbers
  6. Changing plotting backend
  7. Configuring the output of info()
  8. Resetting display options

Please check out the Notebook for source code

For demonstration, we will be using the Titanic dataset available on Kaggle.

#python #data-science #data-analysis #pandas #display-options #8 commonly used pandas display options you should know

Option Pricing Using Reinforcement Learning

This post demonstrates how to use reinforcement learning to price an American Option. An option is a derivative contract that gives its owner the right but not the obligation to buy or sell an underlying asset. Unlike its European-style counterpart, American-style option may exercise at any time before expiry.

American Option is known to be an optimal control MDP (Markov Decision Process) problem where the underlying process is Geometric Brownian motion ([1]). The Markovian state is a price-time tuple and the control is a binary action that decides on each day whether to exercise the option or not.

The optimal stopping policy looks like the figure below, where the x-axis is time and the y-axis is the stock price. The curve in red is commonly called the optimal exercise boundary. On each day, if the stock price falls in the exercise region that is located above the boundary for a call or below the boundary for a put, it is optimal to exercise the option and get paid by the amount between stock price and strike price.

Optimal Exercise Boundary

Optimal Exercise Boundary

One can imagine it as a discretized Q-table as illustrated in dotted grids. Every day the agent or the trader looks up the table and take action according to today’s’ price. The Q-table is monotonous in that all the grids above the boundary yield a go-decision and all the grids below yield a no-go decision. Therefore Q-learning suits well to find the optimal strategy that is defined by this boundary.

The remainder contains three sections. In the first section, a baseline price is computed using classical models. In the second section, an OpenAI gym environment is constructed, similar to building an Atari game. and then in the third section, an agent is trained with DQN (Deep Q-Network) to play American options, similar to training computers to play Atari games. The full Python notebook is located here on Github.


Section One — Baseline

There are many ways to price an American option, from for example binomial tree to Longstaff-Schwartz Monte Carlo methods. Here I use QuantLib package to price a one-year American put option.

#reinforcement-learning #options #tensorflow #option-pricing #deep-learning