Echo Server

Task

Implement an HTTP server that echoes back the entire request it receives.

• Use the provided http-server.h library
• Implement the handle_request function
• Echo back the full HTTP request in the response body

Function Signature

void handle_request(char *request, int client_socket);

HTTP Response Format

HTTP/1.1 200 OK\r\n
Content-Type: text/plain\r\n
\r\n
<the full request echoed here>

IMPORTANT

Use \r\n (carriage return + newline) for line endings in HTTP, not just \n.

Notes

• Use send(client_socket, data, length, 0) to send data to the client
• Use strlen() to get string lengths
• Send the HTTP header first, then echo the request
• Include <string.h> for strlen()

---

Example

If a client sends:

GET /hello HTTP/1.1
Host: localhost:8000
User-Agent: curl/7.68.0
Accept: */*

Your server should respond with:

HTTP/1.1 200 OK
Content-Type: text/plain
 
GET /hello HTTP/1.1
Host: localhost:8000
User-Agent: curl/7.68.0
Accept: */*

Test Locally

$ gcc -o echo_server echo_server.c http-server.c
$ ./echo_server
Server started on port 8000
 
# In another terminal:
$ curl "http://localhost:8000/hello"
GET /hello HTTP/1.1
Host: localhost:8000
User-Agent: curl/7.68.0
Accept: */*

---

Code

#include "http-server.h"
#include <string.h>
 
void handle_request(char *request, int client_socket)
{  
    char* header = "HTTP/1.1 200 OK\r\nContent-Type: text/plain\r\n\r\n";
 
    send(client_socket, header, strlen(header), 0);
    send(client_socket, request, strlen(request), 0);
}