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n = recv(sock, &c, 1, MSG_PEEK);
if ((n > 0) && (c == '\n')){
recv(sock, &c, 1, 0);
}
else{
c = '\n';
}
}
buf[i] = c;
i++;
}
else{
c = '\n';
}
}
buf[i] = '\0';
return i;
}
// 通过文件名获取文件的类型
const char *get_file_type(const char *name){
char* dot;
// 自右向左查找‘.’字符, 如不存在返回NULL
dot = strrchr(name, '.');
if (dot == NULL)
return "text/plain; charset=utf-8";
if (strcmp(dot, ".html") == 0 || strcmp(dot, ".htm") == 0)
return "text/html; charset=utf-8";
if (strcmp(dot, ".jpg") == 0 || strcmp(dot, ".jpeg") == 0)
return "image/jpeg";
if (strcmp(dot, ".gif") == 0)
return "image/gif";
if (strcmp(dot, ".png") == 0)
return "image/png";
if (strcmp(dot, ".css") == 0)
return "text/css";
if (strcmp(dot, ".au") == 0)
return "audio/basic";
if (strcmp( dot, ".wav" ) == 0)
return "audio/wav";
if (strcmp(dot, ".avi") == 0)
return "video/x-msvideo";
if (strcmp(dot, ".mov") == 0 || strcmp(dot, ".qt") == 0)
return "video/quicktime";
if (strcmp(dot, ".mpeg") == 0 || strcmp(dot, ".mpe") == 0)
return "video/mpeg";
if (strcmp(dot, ".vrml") == 0 || strcmp(dot, ".wrl") == 0)
return "model/vrml";
if (strcmp(dot, ".midi") == 0 || strcmp(dot, ".mid") == 0)
return "audio/midi";
if (strcmp(dot, ".mp3") == 0)
return "audio/mpeg";
if (strcmp(dot, ".ogg") == 0)
return "application/ogg";
if (strcmp(dot, ".pac") == 0)
return "application/x-ns-proxy-autoconfig";
return "text/plain; charset=utf-8";
}
// 16进制数转化为10进制
int hexit(char c)
{
if (c >= '0' && c <= '9')
return c - '0';
if (c >= 'a' && c <= 'f')
return c - 'a' + 10;
if (c >= 'A' && c <= 'F')
return c - 'A' + 10;
return 0;
}
/*
* 这里的内容是处理%20之类的东西！是"解码"过程。
* %20 URL编码中的‘ ’(space)
* %21 '!' %22 '"' %23 '#' %24 '$'
* %25 '%' %26 '&' %27 ''' %28 '('......
* 相关知识html中的‘ ’(space)是 
*/
void encode_str(char* to, int tosize, const char* from)
{
int tolen;
for (tolen = 0; *from != '\0' && tolen + 4 < tosize; ++from)
{
if (isalnum(*from) || strchr("/_.-~", *from) != (char*)0)
{
*to = *from;
++to;
++tolen;
}
else
{
sprintf(to, "%%%02x", (int) *from & 0xff);
to += 3;
tolen += 3;
}
}
*to = '\0';
}
void decode_str(char *to, char *from)
{
for ( ; *from != '\0'; ++to, ++from )
{
if (from[0] == '%' && isxdigit(from[1]) && isxdigit(from[2]))
{
*to = hexit(from[1])*16 + hexit(from[2]);
from += 2;
}
else
{
*to = *from;
}
}
*to = '\0';
}
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