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webserver.c
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webserver.c
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#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <arpa/inet.h>
#include <unistd.h>
#include <stdbool.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <signal.h>
#include <dirent.h>
#include "webserver.h"
pid_t child;
void cleanup(int signal) {
int status;
while (waitpid((pid_t) (-1), 0, WNOHANG) > 0);
}
int main(int argc, char **argv) {
signal(SIGCHLD, child_handler);
char *buffer = malloc(sizeof(char) * BUFFER_SIZE);
struct response *resp = malloc(sizeof(struct response));
struct request *req = malloc(sizeof(struct request));
int listenfd, confd;
int wt;
if(argc != 3){
fprintf(stderr, "Usage: webserver <port> <directory>.\n");
exit(0);
}
char *port = argv[1];
char *directory = argv[2];
/* check if directory exists */
DIR* dir = opendir(directory);
if(dir){
/* it exists*/
closedir(dir);
}
else{
fprintf(stderr, "Error directory does not exists.\n");
exit(0);
}
/* create listening descriptor */
listenfd = open_listenfd(port);
/* main loop */
while(1){
wt = WAITTIME;
/* file descriptor connected to client */
confd = accept(listenfd, NULL, NULL);
if(confd < 0){
fprintf(stderr, "Connection error.\n");
exit(0);
}
//child spawned process
if (fork() == 0){
close(listenfd);
while(read_tcp(confd, wt, buffer)){
parse_request(buffer, req, port);
create_response(req, resp,directory);
respond(confd,resp->header,resp->header_size);
if (resp->message_size > 0) {
respond(confd,resp->message, resp->message_size);
}
memset(resp,0, sizeof(struct response));
if(req->keep_conv){
wt = WAITTIME / 10 ;
}
else{
break;
}
}
close(confd);
free(req);
free(buffer);
free(resp);
exit(0);
}
close(confd);
}
free(req);
free(buffer);
free(resp);
close(listenfd);
}