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Nginx FastCGI response buffer sizes

By default when Nginx starts receiving a response from a FastCGI backend (such as PHP-FPM) it will buffer the response in memory before delivering it to the client. Any response larger than the set buffer size is saved to a temporary file on disk. This process is also explained at the Nginx ngx_http_fastcgi_module page document page.

Since disk is slow and memory is fast the aim is to get as many FastCGI responses passing through memory only. On the flip side we don't want to set an excessively large buffer as they are created and sized on a per request basis (i.e. it's not shared memory).

The related Nginx options are:

• fastcgi_buffering appeared in Nginx 1.5.6 (1.6.0 stable) and can be used to turn buffering completely on/off. It's on by default.
• [fastcgi_buffer_size](http://nginx.org/en/

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# to generate your dhparam.pem file, run in the terminal
openssl dhparam -out /etc/nginx/ssl/dhparam.pem 2048

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<?php
/**
 * A simple regex to test whether or not a facebook url is valid. For basic usage, this will do the job.
 * @see Test cases <http://ideone.com/ZMJp4f>
 */ 
	$fbUrlCheck = '/^(https?:\/\/)?(www\.)?facebook.com\/[a-zA-Z0-9(\.\?)?]/';
	$secondCheck = '/home((\/)?\.[a-zA-Z0-9])?/';
	
	$validUrl = 'https://www.facebook.com/atomicpages/';
	

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<?php
	add_shortcode('wp_caption', 'fixed_img_caption_shortcode');
	add_shortcode('caption', 'fixed_img_caption_shortcode');
	function fixed_img_caption_shortcode($attr, $content = null) {
		// New-style shortcode with the caption inside the shortcode with the link and image tags.
		if ( ! isset( $attr['caption'] ) ) {
			if ( preg_match( '#((?:<a [^>]+>\s*)?<img [^>]+>(?:\s*</a>)?)(.*)#is', $content, $matches ) ) {
				$content = $matches[1];
				$attr['caption'] = trim( $matches[2] );
			}

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<?php
/**
 * Filter the output of image_downsize() to return dynamically generated images for intermediate or inline sizes.
 *
 * <p>Because Wordpress generates all image sizes on first upload, if you change
 * theme or size settings after the upload, there won't be a matching file for
 * the requested size.<br/>
 * This filter addresses the problem of the default downsize process laoding
 * a large file and scaling it down in the browser if it doesn't find the right
 * size image. This can cause large files to be loaded unnecessarily and will

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# Stream a video
ffmpeg -re -i video.avi -vf "scale=40:ih*40/iw, crop=40:16" -f rawvideo -vcodec rawvideo -sws_flags bilinear -pix_fmt rgb24 - > /dev/udp/matelight.cbrp3.c-base.org/1337

# Loop a gif
ffmpeg -re -ignore_loop 0 -i image.gif -vf "scale=40:ih*40/iw, crop=40:16" -f rawvideo -vcodec rawvideo -sws_flags bilinear -pix_fmt rgb24 - > /dev/udp/matelight.cbrp3.c-base.org/1337

# Stream webcam
# Mac
ffmpeg -re -f avfoundation -r 30 -s 1280x720 -i "0" -vf "scale=40:ih*40/iw, crop=40:16, pp=autolevels:f, eq=1.5" -f rawvideo -vcodec rawvideo -sws_flags bilinear -pix_fmt rgb24 - > /dev/udp/matelight.cbrp3.c-base.org/1337

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using Newtonsoft.Json;
using System;
using System.Collections.Specialized;
using System.Net;
using System.Text;

//A simple C# class to post messages to a Slack channel
//Note: This class uses the Newtonsoft Json.NET serializer available via NuGet
public class SlackClient
{

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#!/bin/bash
## Install .NET Core 2.0.0 SDK on Ubuntu 16.04 64Bits
## Author: Nilton OS www.linuxpro.com.br
## https://www.microsoft.com/net/core#linuxubuntu
## https://docs.microsoft.com/en-us/aspnet/core/publishing/apache-proxy
## https://medium.com/@renato.groffe/net-core-e-sql-server-em-linux-primeiros-passos-89a7cb475ebd
## Version 0.1


curl https://packages.microsoft.com/keys/microsoft.asc | gpg --dearmor > microsoft.gpg

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server {
    listen  80;
    root /vagrant;
    index index.html index.htm index.php app.php app_dev.php;

    # Make site accessible from http://set-ip-address.xip.io
    server_name 192.168.33.10.xip.io;

    access_log /var/log/nginx/vagrant.com-access.log;
    error_log  /var/log/nginx/vagrant.com-error.log error;

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# check if there is a file named maintenance.html
# so when you want to disable maintenance mode just remname "mv maintenance.html maintenance.html.disabled"
RewriteCond %{DOCUMENT_ROOT}/maintenance.html -f
RewriteCond %{SCRIPT_FILENAME} !maintenance.html
RewriteRule ^.*$ /maintenance.html [R=503,L]
ErrorDocument 503 /maintenance.html