servlets client request


In Java Servlets, a client sends a request to a server using the HTTP protocol. The request contains information about the resource being requested, such as the URL and any parameters. The server processes the request and sends a response back to the client, which may contain data or information about any errors that occurred.

When a servlet receives a client request, it can access information about the request using the HttpServletRequest interface. The HttpServletRequest interface provides methods for retrieving information about the request, such as the request method, headers, URL, parameters, and form data.

Some of the commonly used methods of the HttpServletRequest interface include:

  • getMethod(): Returns the HTTP method used for the request (e.g., GET, POST, PUT, DELETE).

  • getHeader(String name): Returns the value of the specified HTTP request header.

  • getParameter(String name): Returns the value of the specified request parameter.

  • getParameterValues(String name): Returns an array of values for the specified request parameter.

  • getRequestURI(): Returns the URI of the request.

  • getRequestURL(): Returns the URL of the request.

  • getRemoteAddr(): Returns the IP address of the client that sent the request.

  • getInputStream(): Returns an input stream containing the request body.

By using the HttpServletRequest interface, servlets can access information about the client request and generate appropriate responses. This can be useful for tasks such as handling form submissions, generating dynamic content, and implementing RESTful web services.