1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
| #include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <sys/types.h>
#include <sys/select.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <errno.h>
#include <fcntl.h>
#include <sys/stat.h>
int init_listen_socket(short port) {
int listen_fd;
int ret;
struct sockaddr_in server_addr;
listen_fd = socket(AF_INET, SOCK_STREAM, 0);
if (listen_fd < 0) {
fprintf(stderr, "fail to socket : %s\n", strerror(errno));
return -1;
}
int on = 1;
ret = setsockopt(listen_fd, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on));
if (ret == -1) {
perror("set sock reuse addr:");
return -1;
}
memset(&server_addr, 0, sizeof(server_addr));
server_addr.sin_family = AF_INET;
server_addr.sin_port = htons(port);
server_addr.sin_addr.s_addr = htonl(INADDR_ANY);
ret = bind(listen_fd, (struct sockaddr *) &server_addr, sizeof(server_addr));
if (ret < 0) {
perror("fail to bind");
return -1;
}
listen(listen_fd, 5);
return listen_fd;
}
void get_filetype(char *filename, char *filetype)
{
if (strstr(filename, ".html"))
strcpy(filetype, "text/html");
else if (strstr(filename, ".gif"))
strcpy(filetype, "image/gif");
else if (strstr(filename, ".png"))
strcpy(filetype, "image/png");
else if (strstr(filename, ".jpg"))
strcpy(filetype, "image/jpeg");
else
strcpy(filetype, "text/plain");
}
int main(int argc, char *argv[])
{
int listen_fd;
int new_fd;
char buf[1024];
char head[1024];
struct stat *file = NULL;
char *date = NULL;
char filetype[20] = {0};
int ret;
FILE *fp;
unsigned short port = 8888;
if (argc == 2) {
port = strtoul(argv[1], NULL, 10);
}
listen_fd = init_listen_socket(port);
if (listen_fd == -1) {
exit(-1);
}
printf("listen %d port...\n", port);
while (1) {
new_fd = accept(listen_fd, NULL, NULL);
if (new_fd < 0) {
perror("fail to accept");
break;
}
printf("Have a new connection!\n");
memset(buf, 0, sizeof(buf));
ret = recv(new_fd, buf, sizeof(buf), 0);
if(ret<0){
perror("recv");
}
printf("recv:%s" ,buf);
for(int i = 4;;i++)
if(buf[i] == 'H'&& buf[i+1] == 'T' && buf[i+2] == 'T' && buf[i+3] == 'P'){
buf[i-1] = 0;
break;
}
char *filename = buf + 5;
if(strlen(filename)==0)
strcpy(filename, "index.html");
memset(head,0,sizeof(head));
if(strcmp(filename,"health")==0)
{
filename="health.html";
}
fp = fopen(filename ,"rb");
if(NULL == fp){
strcpy(filename, "404.html");
sprintf(head, "HTTP/1.0 404 NOT FOUND\r\n");
fp = fopen(filename ,"rb");
}else
sprintf(head, "HTTP/1.0 200 OK\r\n");
fseek(fp, 0, SEEK_END);
int len = ftell(fp);
if (len <= 0)
{
fclose(fp);
return -1;
}
fseek(fp, 0, SEEK_SET);
date =(char *)malloc( 0x01 << 24);
len = fread(date, 1, len, fp);
get_filetype(filename, filetype);
sprintf(head, "%sServer: Tiny Web Server\r\n", head);
sprintf(head, "%sConnection: close\r\n", head);
sprintf(head, "%sContent-length: %d\r\n", head,len);
sprintf(head, "%sContent-type: %s\r\n\r\n", head, filetype);
printf("Response headers:\n");
printf("%s", head);
ret = send(new_fd, head ,strlen(head) , 0) ;
if(ret <0){
perror("send head");
exit(1);
}
ret = send(new_fd, date ,len , 0) ;
if(ret <0){
perror("send date");
exit(1);
}
free(date);
close(new_fd);
printf("close connection!\n");
}
return 0;
}
|
