Web-server

HTTP Web server in c++

I have developed a web server in c++ with this webserver ,you can easily develop web applications With this web server you can easily deploy your website

This webserver offers certain functionalities/features.

TMWEBProjector server(8080); There is a class of TMWEBProjector of which you have to create object while creating object ,you have to pass a 'port Number' , on which the server will listen/handle the request (in background socket will be bounded by this port number)

TMWebProjector has onRequest method in it's class with onRequest method ,you can specify for particular URL for which particular resource should run on the server side or serve to the client side

while writing functionality in our cpp file the function should contain two parameters ,First one Request type and second is Response Type .The functionality cannot return anything. return type of the function is void for example We have called onRequest() method of TMWEBProjector class,where we will pass two arguments first one is the URL ie->"/register",and second thing is the function address/name that is doSomething while defining the doSomething function ,we can give only two parameters the return type of doSomething function will be void

Request class provides following methods/functionalities->

1. It contains forward method with the help of forward method ,you can further forward request
2. It contains setInt() method
3. It contains setFloat() method
4. It contains setString() method

with above methods ,we can store the value,these value can be further access by the forwarded request

5. It contains get() method .

Return type of get Method is string whatever data comes from client side with request, you can easily fetch it using get() method available in the request class suppose data come in the form of JSON format,which consists {"username":"","Password":""} and you want to verify the username and password in the server side On the server side,you have to call get() method of Request class,while calling the get method,you have to pass one argument ,whichever property value/data you want to access which comes from client side

Response class provides following methods/functionalities->

1. It contains write method,with the help of write method ,you can send the response to the client side() with help of write method ,you can even send a html page
2. Close method available.

Web server works behind the scenes

what happens when a request comes from client side ?

how does the server start ?

TMWEBProjector server(8080) here,first we specified the port Number there is a start method present in the TMWEBProjector class server.start()-> by this our server will start ,and will goes in listening mode on specified(by user) port Number,

What happens in the background of the start() method ?

with the help of socket programming a socket will be created

Things are required to make socket

1)Internet Family

we will be using IPV4 as Internet Family AF_NET represents the value of IPV4

2. Communication Semantics

we will be passing number for communication semantics that number will be represented by SOCK_STREAM

3. Protocol

In our case protocol will be TCP/IP socket function will return anumber ,we will call it socketDescriptor whatever work we will do,it will be done using socketDescriptor

We will bind the socket (with the help of socket descriptor) to an IP and port number with bind function,we are binding socket with IP and Port Number Bind function will return a number .

After binding ,we are putting the socket in the listening mode ,here we are specifying, how many request can come at a time. after that ,there is infinite loop where accept method is being called. Due to accept method ,our socket will go in wait mode(waiting for the request to arrive) whenever a new request will come from client side,to accept method,that request will be diverted and accept method will return us a new socket descriptor

first Response type object will be made,while making it,we will be passing 'SocketDescirptor'.With this socketDescriptor response class object will able to send response to the client side(browser).

Now Request arrived from client side, It's parsing will be done,using requestParser method() will be called ,In requestParser method , client Side request (method(GET/POST)) type , will be known whether it's GET type request or POST type request ,decoding of data will be done first ,then that data will parsed ,it's property and values will be stored in the map

Request type object will be made, all these following properties of request class object will be set in requestParser method

1)resource,2)method,3)isClientSideTechnology ,4)mime Type,5)map

after requestParsing
It will be checked whether it is client side resource or server side resource. if it is client side resource ,then data in bytes will be sent to the server side if it's server side resource ,then it will be checked whether the request url, is mapped with (functionality )server side resource,if 'yes',then server side (resource) functionality will be executed on server end.