Implementation Of Http Client Program using C | Network Lab Exercises

Step 1: Start.

Step 2: Read the Ip, port ID and message from command line

Step 3: Create a socket with address family AF_INET type SOCK_STERAM and default protocol.

Step 4: Initialize the socket and set it attributes set the required port number.

Step 5: Connect to the server using connect () function to initialize the request.

Step 6: Repeat steps 6-8 until server sends bye

Step 7: Accept the client message and write it to the server using write function.

Step 8: If the client message is bye go to step 9.

Step 9: Read the message from the server using read() function. Display the message.

Step 10: stop.

C Program To Implement Http Client

#include #include #include #include #include #include #include #include #define MAXBUF 1024 void PANIC(char *msg); #define PANIC(msg) {perror(msg); abort();} int main(int Count, char *Strings[]) { int sockfd, bytes_read; struct sockaddr_in dest; char buffer[MAXBUF]; /*---Make sure we have the right number of parameters---*/ if ( Count != 3 ) PANIC("usage: testport

\n"); if ( (sockfd = socket(AF_INET, SOCK_STREAM, 0)) < 0 ) PANIC("Socket"); /*---Initialize server address/port struct---*/ bzero(&dest, sizeof(dest)); dest.sin_family = AF_INET; dest.sin_port = htons(80); /*default HTTP Server port */ if ( inet_addr(Strings[1], &dest.sin_addr.s_addr) == 0 ) PANIC(Strings[1]); /*---Connect to server---*/ if ( connect(sockfd, (struct sockaddr*)&dest, sizeof(dest)) != 0 ) PANIC("Connect"); sprintf(buffer, "GET %s HTTP/1.0\n\n", Strings[2]); send(sockfd, buffer, strlen(buffer), 0); /*---While there's data, read and print it---*/ do { bzero(buffer, sizeof(buffer)); bytes_read = recv(sockfd, buffer, sizeof(buffer), 0); if ( bytes_read > 0 ) printf("%s", buffer); } while ( bytes_read > 0 ); /*---Clean up---*/ close(sockfd); return 0; }

SAMPLE INPUT OUTPUT:

$ gcc httpclient.c -o http.exe

$ http.exe 127.0.0.1:8080 hai
Msg: hai

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