├── LICENSE ├── http_server.c ├── http_server.h └── main.c /LICENSE: -------------------------------------------------------------------------------- 1 | GNU GENERAL PUBLIC LICENSE 2 | Version 2, June 1991 3 | 4 | Copyright (C) 1989, 1991 Free Software Foundation, Inc., 5 | 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 6 | Everyone is permitted to copy and distribute verbatim copies 7 | of this license document, but changing it is not allowed. 8 | 9 | Preamble 10 | 11 | The licenses for most software are designed to take away your 12 | freedom to share and change it. By contrast, the GNU General Public 13 | License is intended to guarantee your freedom to share and change free 14 | software--to make sure the software is free for all its users. This 15 | General Public License applies to most of the Free Software 16 | Foundation's software and to any other program whose authors commit to 17 | using it. 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It is safest 289 | to attach them to the start of each source file to most effectively 290 | convey the exclusion of warranty; and each file should have at least 291 | the "copyright" line and a pointer to where the full notice is found. 292 | 293 | {description} 294 | Copyright (C) {year} {fullname} 295 | 296 | This program is free software; you can redistribute it and/or modify 297 | it under the terms of the GNU General Public License as published by 298 | the Free Software Foundation; either version 2 of the License, or 299 | (at your option) any later version. 300 | 301 | This program is distributed in the hope that it will be useful, 302 | but WITHOUT ANY WARRANTY; without even the implied warranty of 303 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 304 | GNU General Public License for more details. 305 | 306 | You should have received a copy of the GNU General Public License along 307 | with this program; if not, write to the Free Software Foundation, Inc., 308 | 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. 309 | 310 | Also add information on how to contact you by electronic and paper mail. 311 | 312 | If the program is interactive, make it output a short notice like this 313 | when it starts in an interactive mode: 314 | 315 | Gnomovision version 69, Copyright (C) year name of author 316 | Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'. 317 | This is free software, and you are welcome to redistribute it 318 | under certain conditions; type `show c' for details. 319 | 320 | The hypothetical commands `show w' and `show c' should show the appropriate 321 | parts of the General Public License. Of course, the commands you use may 322 | be called something other than `show w' and `show c'; they could even be 323 | mouse-clicks or menu items--whatever suits your program. 324 | 325 | You should also get your employer (if you work as a programmer) or your 326 | school, if any, to sign a "copyright disclaimer" for the program, if 327 | necessary. Here is a sample; alter the names: 328 | 329 | Yoyodyne, Inc., hereby disclaims all copyright interest in the program 330 | `Gnomovision' (which makes passes at compilers) written by James Hacker. 331 | 332 | {signature of Ty Coon}, 1 April 1989 333 | Ty Coon, President of Vice 334 | 335 | This General Public License does not permit incorporating your program into 336 | proprietary programs. If your program is a subroutine library, you may 337 | consider it more useful to permit linking proprietary applications with the 338 | library. If this is what you want to do, use the GNU Lesser General 339 | Public License instead of this License. 340 | 341 | -------------------------------------------------------------------------------- /http_server.c: -------------------------------------------------------------------------------- 1 | /* 2 | * http_server.c 3 | * 4 | * Created on: 2015-1-7 5 | * Author: root 6 | */ 7 | 8 | #include 9 | #include 10 | #include 11 | #include /* See NOTES */ 12 | #include 13 | #include 14 | #include 15 | #include 16 | #include 17 | #include 18 | #include 19 | #include 20 | #include 21 | #include 22 | 23 | #include "http_server.h" 24 | 25 | #define WEB_ROOT "/WEB" 26 | int shmid = 0; 27 | 28 | /* 29 | * 1.处理僵尸问题 signal 30 | * 2.处理超时问题(20) select alarm 31 | * 3.保存连接数目(统计在线连接数) shared memory 32 | */ 33 | //standard IO(FILE*) 34 | //hello\r\n(\r 13 \n 10) 35 | //deal line read 36 | //GET / HTTP/1.1 37 | int read_line(int fd,char *buf,int size) 38 | { 39 | int i = 0; 40 | char ch; 41 | for(i = 0;i < size;++i) 42 | { 43 | int n = recv(fd,&ch,1,0); 44 | if(1 == n) 45 | { 46 | buf[i] = ch; 47 | //printf("%d\n",ch); 48 | if(ch == '\n') break; 49 | } 50 | else 51 | { 52 | return -1; 53 | } 54 | } 55 | return i+1; 56 | } 57 | 58 | void do_get(int fd,char *fileName) 59 | { 60 | char path[128] = {'\0'}; 61 | if(strcmp(fileName,"/") == 0) fileName = "/baidu.html"; 62 | sprintf(path,"%s%s",WEB_ROOT,fileName);//衔接字符串 63 | FILE *fp = fopen(path,"r"); 64 | if(fp == NULL) 65 | { 66 | printf("%s is not found\n",path); 67 | char errmsg[32] = {"

404 Not Found

"}; 68 | send(fd,errmsg,strlen(errmsg),0); 69 | return ; 70 | } 71 | while(1) 72 | { 73 | char buf[1024] = {'\0'}; 74 | int read_size = fread(buf,1,sizeof(buf),fp); 75 | if(read_size <= 0) break; 76 | send(fd,buf,read_size,0); 77 | } 78 | fclose(fp); 79 | } 80 | 81 | char* get_fileName(char *buf) 82 | { 83 | char *p = (char *)malloc(256); 84 | p = strchr(buf,' '); 85 | if(p != NULL) 86 | { 87 | *p++ = '\0'; 88 | if(strcmp(buf,"GET") == 0) 89 | { 90 | char *q = strchr(p,' '); 91 | if(q != NULL) 92 | { 93 | *q = '\0'; 94 | return p; 95 | } 96 | } 97 | return NULL; 98 | } 99 | return NULL; 100 | } 101 | 102 | void data_process(int clientfd) 103 | { 104 | fd_set rfds;//deal time out 105 | struct timeval tv; 106 | FD_ZERO(&rfds); 107 | FD_SET(clientfd, &rfds); 108 | tv.tv_sec = 10; 109 | tv.tv_usec = 0; 110 | struct sockaddr_in client_addr; 111 | socklen_t c_length = sizeof(client_addr); 112 | getpeername(clientfd,(struct sockaddr *)(&client_addr),&c_length); 113 | printf("a client %s:%u connect!\n",inet_ntoa(client_addr.sin_addr),client_addr.sin_port); 114 | // addr = (int *)shmat(shmid,NULL,0); 115 | // *addr = 0; 116 | // *addr = *addr + 1; 117 | // printf("count = %d\n",*addr); 118 | // shmdt(addr); 119 | int ret_sl = select(clientfd+1,&rfds,NULL,NULL,&tv); 120 | if(ret_sl == 0) 121 | { 122 | printf("time out a client %s:%u disconnect!\n",inet_ntoa(client_addr.sin_addr),client_addr.sin_port); 123 | //close(clientfd); 124 | // addr = (int *)shmat(shmid,NULL,0); 125 | // *addr = *addr - 1; 126 | // printf("count = %d\n",*addr); 127 | // shmctl(shmid,IPC_RMID,NULL); 128 | exit(0); 129 | } 130 | while(1) 131 | { 132 | char buf[256] = {'\0'}; 133 | int recv_size = read_line(clientfd,buf,sizeof(buf));//<==>read 134 | //printf("size:%d,recv:%s\n",recv_size,buf); 135 | if(recv_size <= 2) break; 136 | //printf("buf = %s\n",buf); 137 | 138 | char *fileName = get_fileName(buf); 139 | //printf("fileName = %s\n",fileName); 140 | if(fileName != NULL) 141 | { 142 | do_get(clientfd,fileName); 143 | } 144 | } 145 | printf("a client %s:%u disconnect!\n",inet_ntoa(client_addr.sin_addr),client_addr.sin_port); 146 | //close(clientfd); 147 | // addr = (int *)shmat(shmid,NULL,0); 148 | // *addr = *addr - 1; 149 | // printf("count = %d\n",*addr); 150 | // shmctl(shmid,IPC_RMID,NULL); 151 | exit(0); 152 | } 153 | 154 | int init_socket(int port) 155 | { 156 | int socketfd = socket(AF_INET,SOCK_STREAM,0); 157 | if(socketfd == -1) 158 | { 159 | perror("socket error"); 160 | exit(1); 161 | } 162 | 163 | struct sockaddr_in server_addr; 164 | server_addr.sin_family = AF_INET; 165 | server_addr.sin_addr.s_addr = htonl(INADDR_ANY); 166 | server_addr.sin_port = htons(port); 167 | memset(server_addr.sin_zero,0,sizeof(server_addr.sin_zero)); 168 | int opt = 1;//1代表重用地址 169 | /* 如果服务器终止后,服务器可以第二次快速启动而不用等待一段时间 */ 170 | int err = setsockopt(socketfd,SOL_SOCKET,SO_REUSEADDR,&opt,sizeof(int)); 171 | if(err == -1) 172 | { 173 | perror("setsockopt error"); 174 | exit(1); 175 | } 176 | int ret = bind(socketfd,(struct sockaddr *)(&server_addr),sizeof(server_addr)); 177 | if(ret == -1) 178 | { 179 | perror("bind error"); 180 | exit(1); 181 | } 182 | 183 | ret = listen(socketfd,20); 184 | if(ret == -1) 185 | { 186 | perror("listen error"); 187 | exit(1); 188 | } 189 | printf("My Web Server is Ready!\n"); 190 | return socketfd; 191 | } 192 | 193 | void start_server(int port) 194 | { 195 | int socketfd = init_socket(port); 196 | while(1) 197 | { 198 | int clientfd = accept(socketfd,NULL,NULL); 199 | if(clientfd == -1) 200 | { 201 | perror("accept error"); 202 | continue; 203 | } 204 | signal(SIGCHLD,sighandler); 205 | // shmid = shmget(1234,4,IPC_CREAT|0666); 206 | // printf("shmid = %d\n",shmid); 207 | //printf("g_data=%d\n",g_data); 208 | if(shmid == -1) 209 | { 210 | perror("error"); 211 | exit(1); 212 | } 213 | int pid = fork(); 214 | if(pid < 0) 215 | { 216 | perror("fork error"); 217 | break; 218 | } 219 | else if(pid == 0) 220 | { 221 | data_process(clientfd); 222 | } 223 | close(clientfd); 224 | } 225 | close(socketfd); 226 | } 227 | 228 | void sighandler(int signo) 229 | { 230 | printf("catch signo = %d\n",signo); 231 | while(1) 232 | { 233 | int ret= waitpid(-1,NULL,WNOHANG); 234 | printf("ret = %d\n",ret); 235 | if(ret > 0) return; 236 | } 237 | } 238 | 239 | -------------------------------------------------------------------------------- /http_server.h: -------------------------------------------------------------------------------- 1 | /* 2 | * http_server.h 3 | * 4 | * Created on: 2015-1-9 5 | * Author: root 6 | */ 7 | 8 | #ifndef HTTP_SERVER_H_ 9 | #define HTTP_SERVER_H_ 10 | 11 | int read_line(int fd,char *buf,int size); 12 | void do_get(int fd,char *fileName); 13 | char* get_fileName(char *buf); 14 | void data_process(int clientfd); 15 | int init_socket(int port); 16 | void start_server(int port); 17 | void sighandler(int signo); 18 | 19 | #endif /* HTTP_SERVER_H_ */ 20 | -------------------------------------------------------------------------------- /main.c: -------------------------------------------------------------------------------- 1 | #include 2 | #include 3 | #include 4 | #include "http_server.h" 5 | 6 | int main(int argc,char* argv[]) 7 | { 8 | start_server(80); 9 | return 0; 10 | } 11 | --------------------------------------------------------------------------------