CGI, FastCGI, WSGI, uWSGI, uwsgi Article, understand

One CGI

# 1、 Universal gateway interface （Common Gateway Interface/CGI） It's an important Internet technology , You can have a client , Request data from a web browser to a program executed on a web server .CGI Describes a standard for transferring data between a server and a request handler .

# 2、CGI The program can be implemented in any script language or completely independent programming language , As long as the language can run on this system .

# 3、 Used for specification web Server transfer to php Data types and data formats in the interpreter , Include URL、 Query string 、POST data 、HTTP header etc. , That's to make sure web server The data passed is in standard format 

# 4、 One sentence summary ：  A standard , It defines how to transfer data between client and server 

Two FastCGI

# 1、 Fast universal Gateway Interface （Fast Common Gateway Interface／FastCGI） It's a way for interactive programs to interact with Web Protocol of server communication .FastCGI It's the early universal Gateway Interface （CGI） Enhanced version of .

# 2、FastCGI Committed to reducing web servers and CGI The cost of interaction between programs , So that the server can process more web requests at the same time .

# 3、 Use FastCGI Server for ：
    Apache HTTP Server ( part )
    Cherokee HTTP Server
    Hiawatha Webserver
    Lighttpd
    Nginx
    LiteSpeed Web Server
    Microsoft IIS
# 4、 One sentence summary ： CGI Upgraded version 

3、 ... and WSGI

# 1、Web Server gateway interface （Python Web Server Gateway Interface, Abbreviation for WSGI） Is for Python Defined by language Web The server and Web A simple and general interface between applications or frameworks . since WSGI After being developed , Similar interfaces have emerged in many other languages .

# 2、wsgi server ( such as uWSGI）  Want to be with  wsgi application（ such as django ） Interaction ,uwsgi You need to forward your requests to django  Handle , that uWSGI  and  django A unified specification is needed for the interaction and invocation of , The norm is WSGI WSGI（Web Server Gateway Interface）

# 3、WSGI, Full name  Web Server Gateway Interface, perhaps  Python Web Server Gateway Interface , Is for  Python  Defined by language  Web  The server and  Web  A simple and general interface between applications or frameworks . since  WSGI  After being developed , Similar interfaces have emerged in many other languages .

# 4、WSGI  The official definition of ,the Python Web Server Gateway Interface. It can be seen from the name , This thing is a Gateway, That's gateway . The role of gateway is to convert between protocols .

# 5、WSGI  As a  Web  The server and  Web  A low-level interface between applications or application frameworks , To improve portability  Web  What application development has in common .WSGI  It's based on the existing  CGI  Standard and designed 

# 6、 One sentence summary ：  by Python Defined web The server and web Interface standards between frameworks 

Four uWSGI

wsgiref,werkzeug（ One is in line with wsgi Agreed web The server + tool kit （ Encapsulated something ））
uWSGI  use c Written language , High performance 
gunicorn：python Written 
tornado： It can also be deployed django project 
# 1、 It's a Web The server （ Similar ones wsgiref,gunicorn）, It has achieved WSGI agreement 、uwsgi、http Such agreement . It is used to receive the dynamic request forwarded by the front-end server and send it to the server after processing  web  Applications .

# 2、Nginx in HttpUwsgiModule Its function is to communicate with uWSGI The server exchanges 

# 3、 One sentence summary ：  One Web Server, That is, an implementation of WSGI Server for , In general, and Apache It's a type of thing , Processing requests from .

5、 ... and uwsgi

location / {
    
          # Mode one 
          #include uwsgi_params; #  Import a Nginx Module he is used for and uWSGI Communicating 
         	#uwsgi_connect_timeout 30; #  Set up the connection uWSGI Timeout time 
          #uwsgi_pass 101.133.225.166:8080;
          # Mode two 
          #include uwsgi_params; #  Import a Nginx Module he is used for and uWSGI Communicating 
          #uwsgi_pass unix:///var/www/script/uwsgi.sock; #  Appoint uwsgi Of sock File all dynamic requests 
          # Mode three 
          proxy_pass http://101.133.225.166:8088
    
        }

# 1、 It is uWSGI The unique protocol implemented by the server , Used to define the type of transmission information , It is used for front-end servers and  uwsgi  Communication specification .

# 1、 One sentence summary ： uWSGI An agreement of its own 
uWSGI：web The server , Equate to wsgiref
uwsgi:uWSGI Own agreement 

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