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httpsrv.c
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httpsrv.c
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#include <errno.h>
#include <fcntl.h>
#include <getopt.h>
#include <pthread.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/epoll.h>
#include <unistd.h>
#include "fd.h"
#include "global.h"
#include "handle_request.h"
#include "http_request.h"
#include "picohttpparser.h"
#include "thpool.h"
#include "timer.h"
#include "util.h"
static void check_option(int argc, char *argv[]);
static void set_sig_handler(int sig,void (*func)(int));
static void epoll_add_fd(int epfd,int fd,int events, http_request_t *request );
static void clean_request(http_request_t *request);
static int worker_loop(void *ptr);
int main(int argc, char *argv[])
{
//参数设置
check_option(argc,argv);
//屏蔽SIGPIPE,管道或socket的另一端已关闭. 写端会触发SIGPIPE信号导致服务端进程终止
set_sig_handler(SIGPIPE,SIG_IGN);
//创建监听描述符:SO_REUSEADDR,非阻塞
int listenfd = create_listenfd();
//创建epoll并添加监听描述符
int epfd = creat_epollfd();
//添加监听描述符到epfd: 可读, 边缘触发
http_request_t *request = (http_request_t *)malloc(sizeof(http_request_t));
epoll_add_fd(epfd,listenfd, EPOLLIN | EPOLLET,request);
//线程池: 默认4 worker
threadpool thpool = thpool_init(worker_num);
//初始化timer
timer_init();
pthread_mutex_init(&timer_lock,NULL);
//事件循环
for (;;)
{
size_t timeout = get_timewait();//incomplete
int n = epoll_wait(epfd, events, MAXEVENTS,timeout);
//若存在可读描述符, 遍历描述符
for (int i = 0; i < n; i++)
{
http_request_t *r = (http_request_t *)events[i].data.ptr;
int fd = r->fd;
/* 如果是监听描述符中来了新的连接,则一一连接,并将连接描述符添加到epoll中;
*/
if (listenfd == fd)
{
int infd;
while (1)
{
infd = accept(listenfd, NULL,NULL);
if (infd < 0)
{
//EAGAIN,EWOULDBLOCK属于本应阻塞错误, 可重试.
if ((errno == EAGAIN) || (errno == EWOULDBLOCK)) break;
log_warns("accept");//too many open files
break;
}
make_socket_non_blocking(infd);
http_request_t *request = (http_request_t *)malloc(sizeof(http_request_t));
epoll_add_fd(epfd,infd, EPOLLIN | EPOLLET | EPOLLONESHOT, request);
add_timer(request, TIMEOUT_DEFAULT, http_expire_handler);
} // end of while of accept
}
/* 若是已连接描述符有了可读事件, 则将任务添加到任务队列中 */
else
{
del_timer(events[i].data.ptr);
if ((events[i].events & EPOLLERR) || //发生错误
(events[i].events & EPOLLHUP) ||
(!(events[i].events & EPOLLIN)))
{
log_warns("epoll error fd: %d", r->fd);
clean_request(r); //移除该文件描述符
continue;
}
thpool_add_task(thpool, (void (*)(void *))worker_loop, events[i].data.ptr);
}
}
}
return 0;
}
static void check_option(int argc, char *argv[]){
int opt;
struct option long_option[] = {
{"help", no_argument, NULL, 'h'},
{"port", required_argument,NULL,'p'},
{"thread",required_argument,NULL,'t'},
{NULL, 0, NULL, 0}};
while ((opt = getopt_long(argc, argv, "hp:d:t:", long_option, NULL)) != -1)
{
switch (opt)
{
case 'h':
printf("\033[31m USAGE: \033[0m\n"
"\t-p PORT\n"
"\t-d DIR"
"\t-t THREAD_NUM"
);
exit(0);
case 'd':
printf("working dir:%s\n",optarg);
dir[0] = dir[1] = '\0';
sprintf(dir,"%s",optarg);
break;
case 'p':
printf("setting port:%s\n",optarg);
port = atoi(optarg);
break;
case 't':
printf("worker number:%s\n",optarg);
worker_num = atoi(optarg);
break;
default:
exit(1);
}
}
if (optind < argc)
{
printf("non-option: ");
while (optind < argc)
{
printf("%s", argv[optind++]);
}
putchar ('\n');
exit(-1);
}
}
static void set_sig_handler(int sig,void (*func)(int)){
struct sigaction sa;
memset(&sa, 0, sizeof(sa));
sa.sa_handler = func;
sa.sa_flags = 0;
if (sigaction(sig, &sa, NULL) == -1)
log_err("err sigaction\n");
}
static void epoll_add_fd(int epfd,int fd,int events, http_request_t *request ){
struct epoll_event event_temp;
if (request == NULL)
{
log_err("malloc(sizeof(hs_http_request_t))");
}
request->fd = fd;
request->keeplive = 0;
request->epfd = epfd;
event_temp.data.ptr = (void *)request;
event_temp.events = events;
//添加该listenfd到epoll
epoll_add(epfd,fd,&event_temp);
return;
}
void clean_request(http_request_t *request){
Close(request->fd);
free(request->timer);
free(request);
}
/*************处理函数******************/
static int worker_loop(void *ptr){
#ifndef NDEBUG
printf("threadID: %ld\n",(unsigned long int)pthread_self());
#endif
http_request_t *request = (http_request_t *)ptr;
request->buflen=0;
request->prevbuflen=0;
request->finish = 0;
ssize_t rret;
while (1) {
/* 读取该请求 */
while ((rret = read(request->fd,
request->buf + request->buflen,
sizeof(request->buf) - request->buflen)) == -1 && errno == EINTR
)
continue;
if (rret == 0){ //正常关闭
clean_request(request);
return 0;
}
if (rret < 0){//读取发生错误
if ((errno == EAGAIN) || (errno == EWOULDBLOCK)){//可重试错误
//处理完毕
if(request->keeplive){
//重新注册
struct epoll_event event;
event.data.ptr = ptr;
request->finish = 0;
event.events = EPOLLIN | EPOLLET | EPOLLONESHOT;
epoll_ctl(request->epfd, EPOLL_CTL_MOD, request->fd, &event);
add_timer(request, TIMEOUT_DEFAULT, http_expire_handler);
return 0;
}else{
clean_request(request);
return 0;
}
}
else
{
clean_request(request);
return -1;
}
}
//正常读取
request->prevbuflen = request->buflen;
request->buflen += rret;
//解析请求
request->num_headers = sizeof(request->headers) / sizeof(request->headers[0]);
request->pret = phr_parse_request(request->buf, request->buflen, &request->method,
&request->method_len, &request->request_url, &request->request_url_len,
&request->minor_version, request->headers, &request->num_headers,
request->prevbuflen
);
if (request->pret > 0){//成功解析
//处理header
http_handle_header(ptr);
//处理URL
http_handle_url(ptr);
#ifndef NDEBUG
printf("request is %d bytes long\n", request->pret);
printf("method is %.*s\n", (int)request->method_len, request->method);
printf("path is %.*s\n", (int)request->path_len, request->path);
printf("HTTP version is 1.%d\n", request->minor_version);
printf("headers:\n");
for (size_t i = 0; i != request->num_headers; ++i) {
printf("%.*s: %.*s\n", (int)request->headers[i].name_len,request->headers[i].name,
(int)request->headers[i].value_len, request->headers[i].value);
}
printf("\033[31m ------------- \033[0m\n");
#endif
//判断文件类型
// file_type * request_file_type = get_file_type_from_path(request->path); php?待完成
//静态处理
response_static_file(request);
// break;
}
else if (request->pret == -1){//解析发生错误
clean_request(request);
return -1;
}
if (request->buflen == sizeof(request->buf)){
strncpy(request->buf, request->buf+request->prevbuflen,request->buflen-request->prevbuflen);
request->buflen=request->buflen-request->prevbuflen;
request->prevbuflen=0;
// return -1;
}
}
// clean_request(request);
return 0;
}