dead_simple_web_server.c

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <sys/wait.h>

#define BACKLOG 100
int sockfd;

void create_and_bind() {
    int portf=8880;
    int yes=1;
    struct sockaddr_in my_addr;

    if ((sockfd = socket(PF_INET, SOCK_STREAM, 0)) == -1) {
        perror("socket");
        exit(1);
    }

    if (setsockopt(sockfd,SOL_SOCKET,SO_REUSEADDR,&yes,sizeof(int)) == -1) {
        perror("setsockopt");
        exit(1);
    }

    my_addr.sin_family = AF_INET;
    my_addr.sin_port = htons(portf);
    my_addr.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
    memset(&(my_addr.sin_zero), '\0', 8);

    if (bind(sockfd, (struct sockaddr *)&my_addr, sizeof(struct sockaddr)) == -1) {
        perror("bind");
        exit(1);
    }

    if (listen(sockfd, BACKLOG) == -1) {
        perror("listen");
        exit(1);
    }
}

int main(void) {
    char in[3000],  sent[1024], code[50],  mime[100];
    char *result;
    char *json="{\"var1\":\"value1\"}";
    int new_fd;
    struct sockaddr_in their_addr;

    create_and_bind();
    while(1) {
        socklen_t sin_size = sizeof(struct sockaddr_in);
        if ((new_fd = accept(sockfd, (struct sockaddr *)&their_addr, &sin_size)) == -1) {
            perror("accept");
            continue;
        }

        if (read(new_fd, in, sizeof(in)) == -1) {
            perror("recive");
            continue;
        }
        result = strtok(in, " ");
        result = strtok(NULL, " ");
        printf("result=%s\n",result);

        strcpy (mime, "application/json");
        strcpy (code, "200 OK");

        sprintf(sent,"HTTP/1.1 %s\r\n",code);
        sprintf(sent+strlen(sent),"Server: picohttpd 0.1.0\r\n");
        sprintf(sent+strlen(sent), "Content-Length: %d\r\n",(int)strlen(json));
        sprintf(sent+strlen(sent), "Connection: close\r\n");
        sprintf(sent+strlen(sent), "Content-Type: %s; charset=utf-8\r\n\r\n",mime);
        sprintf(sent+strlen(sent), "%s",json);
        if (write(new_fd, sent, strlen(sent))<1){
        }
        close(new_fd);
    }
    return 0;
}