// 静态网页 文本等的处理
static void echo_www(int sock,const char* path, ssize_t size)
{
int fd = open(path, O_RDONLY);
if (fd < 0)
{
echo_errno(sock);
return;
}
printf("get a new client: %d -> %s \n", sock, path);
char status_line[_SIZE_];
sprintf(status_line, "HTTP/1.0 200 OK\r\n\r\n");// 发送 回应行 和 空行 之间GET没有参数 参数 在url中
send(sock, status_line, strlen(status_line), 0);
/////////////////////////////////////////////////////
// sendfile 将fd拷贝到 sock 直接在内核态完成 不许要经历用户态 切换 【高效】
if (sendfile(sock, fd, NULL, size) < 0) // 发送文件内容 回应内容
{
echo_errno(sock);
return;
}
close(fd);
close(sock);
}
static void echo_www(int sock, const char *path, ssize_t size)
{
int fd = open(path, O_RDONLY); //index.html and ....... //fcntl
if(fd < 0)
{
echo_errno(sock);
return;
}
printf("get a new client %d\n %s\n", sock, path);
char status_line[SIZE];
sprintf(status_line, "HTTP/1.0 200 OK\r\n\r\n");
send(sock, status_line, strlen(status_line), 0);
if( sendfile(sock, fd, NULL, size) < 0 )
{
echo_errno(sock);
return;
}
close(fd);
}
static void echo_www(int sock,const char* path,ssize_t size)
{
int fd = open(path,O_RDONLY);
if(fd < 0)
{
echo_errno(sock,1);//
return ;
}
printf("get a new client: %d -> %s\n",sock,path);
char buf[SIZE];
sprintf(buf,"HTTP/1.0 200 OK\r\n\r\n");
send(sock,buf,strlen(buf),0);
if(sendfile(sock,fd,NULL,size) < 0)//sendfile 提高效率
{
echo_errno(sock,1);
return ;
}
close(fd);
}
static void * accept_request(void *arg)
{
int sock = (int)arg;
char buf[_SIZE_];
char method[_SIZE_/10];
char url[_SIZE_];
char path[_SIZE_];
memset(buf, '\0', sizeof(buf));
memset(buf, '\0', sizeof(method));
memset(buf, '\0', sizeof(url));
memset(buf, '\0', sizeof(path));
int cgi = 0;
int ret = -1;
char *query_string = NULL; // 数据参数
int len = sizeof(buf) / sizeof(buf[0]);
#ifdef _DEBUG_
do
{
// http 请求 报文 按行存储
ret = get_line(sock, buf, len);
printf("%s", buf);
fflush(stdout);
} while (ret > 0 && strcmp(buf, "\n") != 0);
#endif
ret = get_line(sock, buf, len); // 获取请求行
printf("line: %s\n", buf);
if (ret < 0)
{
echo_errno(sock);
return (void*)1;
}
// GET / HTTP/1.0
int i = 0; // method index
int j = 0; // buf index
// 请求行 包括 【方法(GET/POST)】【url】【HTTP/1.0(1.1)】
// 获取方法 GET/POST
while ((i < sizeof(method) - 1) && (j < sizeof(buf)) && (!isspace(buf[j])))
{
method[i] = buf[j];
++i;
++j;
}
method[i] = '\0';
// strcasecmp 忽略大小写的比较
if (strcasecmp(method, "GET") != 0 && strcasecmp(method, "POST") != 0)
{
echo_errno(sock);
return (void*)2;
}
// 跳过空格
while (j < sizeof(buf) && isspace(buf[j]))
{
j++;
}
i = 0;
// 获取url url是除了域名 端口号之后的 /。。。
while ((i < sizeof(url) - 1) && (j < sizeof(buf)) && (!isspace(buf[j])))
{
url[i++] = buf[j++];
}
url[i] = '\0';
//GET 所传递的参数 在URL中， 从server的QUERY_STRING 中获取
//POST 所传递的参数 在 数据包中 从server环境变量中CONTENT_LENGTH 环境变量中获取参数 数据的长度
if (strcasecmp(method, "POST") == 0)
{
cgi = 1;
}
if (strcasecmp(method, "GET") == 0)
{
query_string = url;
// 路径和数据参数 以？分隔 如 http:// baidu.com /s ? k = v
while (*query_string != '\0' && *query_string != '?')
{
++query_string;
}
if(*query_string == '?') // GET 带参数 需要进一步处理参数
{
cgi = 1;
*query_string++ = '\0';
}
}
// 没指定具体网页 加默认网页 和 根文件夹（安全考虑）
sprintf(path, "httpdoc%s", url);
if (path[strlen(path) - 1] == '/')
{
strcat(path, "index.html");
}
// method , query_string, cgi, path
struct stat st;
if (stat(path, &st) < 0) // 测文件在不在
{
echo_errno(sock);
return (void*)3;
}
else
{
if (S_ISDIR(st.st_mode))// 测是不是 文件夹
{
strcat(path, "/index.html");
}
else if( (st.st_mode & S_IXUSR) ||\
(st.st_mode & S_IXGRP) ||\
(st.st_mode & S_IXOTH))
// 查看cgi执行权限
{
cgi = 1;
}
else
{}
if (cgi)
{
exec_cgi(sock, method, path, query_string);
}
else
{
clear_header(sock); //
echo_www(sock, path, st.st_size);
}
}
}
static void exec_cgi(int sock, const char *method, const char *path, const char *query_string )
{
char buf[_SIZE_];
int content_length = -1;// 内容长度 方便获取内容
int ret = -1;
int cgi_input[2];
int cgi_output[2];
char method_env[_SIZE_];
char query_string_env[_SIZE_];
char content_length_env[_SIZE_];
printf("[exec_cgi ]method : %s \n", method);
if (strcasecmp(method, "GET") == 0)
{
clear_header(sock);
}
else // POST
{
do
{
ret = get_line(sock, buf, sizeof(buf));
if (strncasecmp(buf, "Content-Length: ", 16) == 0)
{
content_length = atoi(&buf[16]);
// break 不用 break 即把参数Content-Length获取 又把 空行删除
}
}while ((ret > 0) && strcmp(buf, "\n") != 0);
if (content_length == -1)
{
echo_errno(sock);
return;
}
}
sprintf(buf, "HTTP/1.0 200 OK\r\n\r\n");
send(sock, buf, strlen(buf), 0);
// 创建 父子进程之间的 通信管道 cgi_input子进程的读 cgi_output子进程的写
if (pipe(cgi_input) < 0)
{
echo_errno(sock);
return;
}
if (pipe(cgi_output) < 0)
{
echo_errno(sock);
return;
}
pid_t id = fork();
if (id < 0)
{
echo_errno(sock);
return ;
}
if (id == 0)// child
{
close(cgi_input[1]);
close(cgi_output[0]);
// ////////////////
// 重定向 管道到 标准输入 和 输出 这样以后 printf()直接打到管道
dup2(cgi_input[0], 0);
dup2(cgi_output[1], 1);
sprintf(method_env, "REQUEST_METHOD=%s", method);
putenv(method_env);// 注册环境变量 这样 execl 执行二进制程序时时 获取这些参数方便getenv
// GET 要得 参数 在请求字段 中 环境变量注册 quer_string_env
// post 要的参数在 内容中 所以要知道 内容什么时候截至（内容长度）所以 只要知道content_length_env 就可以了
if (strcasecmp(method, "GET") == 0)
{
sprintf(query_string_env, "QUERY_STRING=%s", query_string);
putenv(query_string_env);
}
else // post
{
sprintf(content_length_env, "CONTENT_LENGTH=%d", content_length);
putenv(content_length_env);
printf("%d-----------env\n", content_length);
}
// 执行 二进制 程序
execl(path,path,NULL);
exit(1);
}
else // father
{
close(cgi_input[0]);
close(cgi_output[1]);
char c = '\0';
int i = 0;
printf("%s --fmethod\n", method);
if (strcasecmp(method, "POST") == 0)
{
printf("--father here %d\n", content_length);
for (; i < content_length; i++)
{
recv(sock, &c, 1, 0);
printf("--%c ", c);
fflush(stdout);
write(cgi_input[1], &c, 1);// 给子进程 发过去
}
}
printf("\n");
int ret = 0;
while ((ret = read(cgi_output[0], &c, 1)) > 0)// 子进程退出 文件符号关闭 read读完文件结尾 返回0
{
send(sock, &c, 1, 0);// 父进程 负责向sock发送子进程的数据
}
waitpid(id, NULL, 0);
close(sock);
}
}
static void * accept_request(void* arg)
{
int sock = (int)arg;
printf("%d\n",sock);
char buf[SIZE];
int ret = 0;
#ifdef _DEBUG_
do
{
ret = get_line(sock,buf,size);
printf("%s",buf);
fflush(stdout);
}while(ret > 0 && strcmp(buf,'\n'));
#endif
char method[SIZE / 10];
char url[SIZE];
char* query_string = NULL;
int cgi = 0;
char path[SIZE];
memset(method,'\0',sizeof(method));
memset(url,'\0',sizeof(url));
ret = get_line(sock,buf,sizeof(buf));
if(ret < 0)
{
echo_errno(sock,1);
return (void*)1;
}
printf("%s\n",buf);
//1 get method
//GET //xx//yy HTTP/1.1
int i = 0;
int j =0;
while(i< sizeof(method) - 1 && !isspace(buf[j]) && j < sizeof(buf) )
{
method[i]=buf[j];
++i;
++j;
}
method[i] = '\0';
//2 check method
if(strcasecmp(method,"GET")!=0 && strcasecmp(method,"POST") != 0)
{
echo_errno(sock,1);
return (void*)2;
}
//3 get url first step space
while(isspace(buf[j]))
{
++j;
}
i=0;
while(!isspace(buf[j])&& (i < sizeof(url)-1) && j < sizeof(buf))
{
url[i] = buf [j];
++i;
++j;
}
if(strcasecmp(method,"POST") == 0)
{
cgi = 1;
}
printf("method: %s,url_path :%s\n ",method,url);
if(strcasecmp(method,"GET") == 0)
{
query_string = url;
}
char *start = url;
while( *start != '\0')
{
if( *start == '?')
{
cgi = 1;
*start = '\0';
query_string = start+1;
break;
}
++start;
}
sprintf(path,"htdoc%s",url);
if(path[strlen(path)-1] == '/')
{
strcat(path,"index.html");
}
//
printf("path:%s\n",path);
printf("cgi:%d\n",cgi);
//method,query_string,cgi,path
struct stat st;
if(stat(path,&st) < 0)//default -> htdoc/index.html
{
printf("stat error\n");
echo_errno(sock,1);
return (void*)-3;
}
else
{
if(S_ISDIR(st.st_mode))
{
strcpy(path,"htdoc/index.html");
}
if(( st.st_mode & S_IXGRP)||\
( st.st_mode & S_IXGRP)||\
st.st_mode & S_IXOTH)
{
cgi = 1;
}
else
{}
//path cgi
if(cgi)
{
printf("cgi mode\n");
execut_cgi(sock,path,method,query_string);
}
else// 请求首页内容
{
clear_head(sock);
echo_www(sock,path,st.st_size);
}
}
close(sock); //no face link
return (void*) 0;
}
static void execut_cgi(int sock,const char* path,const char* method,const char* query_string)
{
int content_len = -1;
char buf[SIZE];
memset(buf,'\0',sizeof(buf));
int cgi_input[2];
int cgi_output[2];
printf("method: %s\n",method);
if(strcasecmp(method,"GET") == 0)
{
clear_head(sock);
}else //POST
{
printf("aaaaaaaaaaaaaaaa\n");
int ret = 0;
do{
ret = get_line(sock,buf,sizeof(buf));
if(strncasecmp(buf,"Content-Length: ",16) == 0)
{
content_len = atoi(&buf[16]);
}
}while((ret > 0) && strcmp(buf,"\n") != 0);
printf("contlen:%d\n",content_len);
if(content_len == -1)
{
echo_errno(sock,1);
return ;
}
}
if(pipe(cgi_output) < 0)
{
echo_errno(sock,1);
return ;
}
if(pipe(cgi_input) < 0)
{
echo_errno(sock,1);
return ;
}
sprintf(buf,"HTTP/1.0 200 OK\r\n\r\n");
send(sock,buf,strlen(buf),0);
pid_t id = fork();
// 处理客户端请求
if(id == 0)//child
{
close(cgi_input[1]);
close(cgi_output[0]);
dup2(cgi_input[0],0);
dup2(cgi_output[1],1);
sprintf(buf,"REQUEST_METHOD=%s",method);
putenv(buf);
if(strcasecmp(method,"GET") == 0)
{
sprintf(buf,"QUERY_STRING=%s",query_string);
putenv(buf);
}else
{
sprintf(buf,"CONTENT_LENGTH=%d",content_len);
putenv(buf);
}
execl(path,path,NULL);
exit(1);
}else //father
{
close(cgi_input[0]);
close(cgi_output[1]);
int i=0;
char c = '\0';
if(strcasecmp(method,"POST")==0)
{
printf("cccccccccccc\n");
for(;i < content_len;++i)
{
recv(sock,&c,1,0);
write(cgi_input[1],&c,1);
}
}
printf("\n");
while(read(cgi_output[0],&c,1) > 0)
{
send(sock,&c,1,0);
}
waitpid(id,NULL,0);
close(cgi_input[1]);
close(cgi_output[0]);
}
}
void* accept_request(void* arg)
{
pthread_detach(pthread_self());
int sock = (int)arg;
char buf[_SIZE_];
char method[_SIZE_];
char url[_SIZE_];
char path[_SIZE_];
memset(buf, '\0', sizeof(buf));
memset(method, '\0', sizeof(method));
memset(url, '\0', sizeof(url));
memset(path, '\0', sizeof(path));
int cgi = 0;
int ret = -1;
char* query_string = NULL;
#ifdef _DEBUG_
do{
ret = get_line(sock, buf, sizeof(buf));
printf("%s", buf);
fflush(stdout);
} while((ret > 0) && (strcmp(buf, "\n") != 0));
#endif
ret = get_line(sock, buf, sizeof(buf));
if(ret < 0)
{
echo_errno(sock);
return (void *)1;
}
//GET /HTTP/1.1
int i = 0; // method index
int j = 0; // buf index
while( (i < sizeof(method)-1) && (j < sizeof(buf)) && (!isspace(buf[j])))
{
method[i] = buf[j];
i++, j++;
}
method[i] = '\0';
while( isspace(buf[j]) )
{
j++;
}
if(strcasecmp(method, "GET") != 0 && strcasecmp(method, "POST") != 0)
{
echo_errno(sock);
return (void*)2;
}
if(strcasecmp(method, "POST") == 0)
{
cgi = 1;
}
i = 0; // url index
while( (i<sizeof(url)-1) && (j < sizeof(buf)) && (!isspace(buf[j])))
{
url[i] = buf[j];
i++, j++;
}
if(strcasecmp(method, "GET") == 0)
{
query_string = url;
while(*query_string != '\0' && *query_string != '?' )
{
query_string++;
}
if(*query_string == '?')
{
cgi = 1;
*query_string = '\0';
query_string++;
}
}
// / /aa/bb/cc
sprintf(path, "htdoc%s", url); // htdoc/
if(path[strlen(path) - 1] == '/')
{
strcat(path, "index.html");
}
printf("method: %s\n", method);
printf("path: %s\n", path);
printf("query_string: %s\n", query_string);
struct stat st;
if(stat(path, &st) < 0)
{
echo_errno(sock);
return (void*)3;
}
else
{
if(S_ISDIR(st.st_mode))
{
strcpy(path, "htdoc/index.html");
}
else if( (st.st_mode & S_IXUSR) || (st.st_mode & S_IXGRP) || (st.st_mode & S_IXOTH) )
{
cgi = 1;
}
else
{}
if(cgi)
{
exec_cgi(sock, path, method, query_string);
}
else
{
clear_header(sock);
echo_html(sock, path, st.st_size);
}
}
close(sock);
return (void*)0;
}
static void* accept_request(void *arg) //static
{
int sock = (int)arg;
char buf[SIZE];
int len = sizeof(buf)/sizeof(*buf);
char method[SIZE/10];
char url[SIZE];
char path[SIZE];
int ret = -1;
int i = 0;
int j = 0;
char *query_string = NULL; //aim at val(can shu)
int cgi = 0;
#ifdef _DEBUG_
// do
// {
// ret = get_line(sock, buf, len);
// printf("%s", buf);
// fflush(stdout);
// }while(ret > 0 && (strcmp(buf, "\n") != 0) );
#endif
memset(buf, '\0', sizeof(buf));
memset(method, '\0', sizeof(method));
memset(url, '\0', sizeof(url));
memset(path, '\0', sizeof(buf));
//Request Line
ret = get_line(sock, buf, len);
if(ret <= 0)
{
echo_errno(sock);
return (void*)1;
}
i = 0; //method index
j = 0; //buf index
while((i < (sizeof(method)/sizeof(*method) - 1)) && (j < sizeof(buf)/sizeof(*buf) - 1) && (!isspace(buf[j]) ) )
{
method[i] = buf[j];
++i;
++j;
}
method[i] = '\0';
if((strcasecmp(method, "GET") != 0) && (strcasecmp(method, "POST")) )
{
//echo_errno(sock);
return (void*)2;
}
//URL
while(isspace(buf[j])) //Remove Space
{
++j;
}
i = 0;
while( ( i < sizeof(url)/sizeof(*url)-1 ) && (j < sizeof(buf)/sizeof(*buf)) && (!isspace(buf[j])) )
{
url[i] = buf[j];
++i;
++j;
}
url[i] = '\0';
if( strcasecmp(method, "POST") == 0 )
{
cgi = 1;
sprintf(path, "%s", url+1);
}
if( strcasecmp(method, "GET") == 0 )
{
query_string = url;
while( *query_string != '\0' && *query_string != '?' )
{
query_string++;
}
if(*query_string == '?')
{
cgi = 1;
*query_string = '\0';
++query_string;
}
}
if( strcasecmp(method, "GET") == 0 )
{
sprintf(path, "htdoc%s", url);
if( path[strlen(path)-1] == '/' )
{
strcat(path, "index.html");
}
}
struct stat st;
if( stat(path, &st) < 0 )
{
//echo_errno(); //404
return (void*)3;
}
else //case : DIR
{
if( S_ISDIR(st.st_mode) )
{
strcat(path, "index.html");
}
else if( (st.st_mode & S_IXUSR) || (st.st_mode & S_IXGRP) || (st.st_mode & S_IXOTH) ) //bin(binary file)
{
cgi = 1;
}
else
{} //noting to do
}
printf("!@!#%@^ %s !@%@^%\n", buf);
if(cgi) // u+x file
{
printf("!!!!!!!!!!!!!!!!!!!!!!!!!!!!cgi\n");
exe_cgi(sock, method, path, query_string); //cgi mode
}
else //.jpg .html ...
{
printf("!!!!!!!!!!!!!!!!!!!!!!!!!!!!!www\n");
clear_header(sock); //! important!
echo_www(sock, path, st.st_size);
}
close(sock);
return 0;
}
static void exe_cgi( int sock, const char *method, const char *path, const char *query_string )
{
char buf[SIZE];
int content_length = -1;
//pipe named by child side
int cgi_input[2];
int cgi_output[2];
char method_env[SIZE];
char query_string_env[SIZE];
char content_length_env[SIZE];
char tmpc;
memset(buf, '\0', sizeof(buf)); // ! ! ! ! ! M U S T I N I T A R R A Y ! ! !
memset(method_env, '\0', sizeof(method_env));
memset(query_string_env, '\0', sizeof(query_string));
memset(content_length_env, '\0', sizeof(content_length_env));
if(strcasecmp(method, "GET") == 0 )
{
clear_header(sock); //"GET" send val by url ,already get
}
int ret = 0;
if(strcasecmp(method, "POST") == 0 ) //different
{
do
{
memset(buf, '\0', sizeof(buf));
ret = get_line(sock, buf, sizeof(buf));
if( strncasecmp(buf, "Content-Length: ", 16) == 0)
{
content_length = atoi(&buf[16]);
}
}while( (ret > 0) && strcmp(buf, "\n") != 0 );
printf("content_length = %d\n", content_length);
if( content_length == -1 )
{
echo_errno(sock);
return;
}
}
///////////// (8.11) /////////////////////////////
sprintf(buf, "HTTP/1.0 200 OK\r\n\r\n");
send(sock, buf, strlen(buf), 0);
if( pipe(cgi_input) < 0 )
{
echo_errno(sock);
return;
}
if( pipe(cgi_output) < 0 )
{
echo_errno(sock);
return;
}
pid_t id = fork();
if(id == 0) //child
{
close(cgi_input[1]);
close(cgi_output[0]);
dup2(cgi_input[0], 0);
dup2(cgi_output[1], 1);
sprintf(method_env, "REQUEST_METHOD=%s", method);
putenv(method_env);
if( strcasecmp(method, "GET") == 0 ) //GET
{
sprintf(query_string_env, "QUERY_STRING=%s", query_string);
putenv(query_string_env);
}
else //POST
{
sprintf(content_length_env, "CONTENT_LENGTH=%d", content_length);
putenv(content_length_env);
}
execl(path, path, NULL);
//run here , execl wrong
exit(1);
}
else //father
{
close(cgi_input[0]);
close(cgi_output[1]);
// dup2(cgi_input[1], 1);
// dup2(cgi_output[0], 0);
char c = '\0';
int i =0;
if( strcasecmp(method, "POST") == 0 )
{
for(; i < content_length; ++i)
{
recv(sock, &c, 1, 0);
printf("%c", c);
write(cgi_input[1], &c, 1);
}
}
int ret = 0;
while( read(cgi_output[0], &c, 1) > 0)
{
send(sock, &c, 1, 0);
}
waitpid(id, NULL, 0);
}
}