参考文章
- 参考文章:【源码剖析】tinyhttpd —— C 语言实现最简单的 HTTP 服务器
- 参考文章:在Ubuntu下运行tinyhttpd及其测试例子
get和post请求格式
- get不带参请求格式
"GET / HTTP/1.1\n\n\n" - get带参请求格式(参数即url地址?后的部分)
"GET /?具体参数 HTTP/1.1\n\n\n" - post请求
"POST / HTTP/1.1\nContent-Length:119\n\nsongshiqixieaoxieao\n\n"意思是发送一内容长度为19的post请求。
具体分析
accept-request函数分析请求类型,get不带参数请求转serve_file函数处理,get带参数请求和post请求转execute_cgi函数处理。
serve_file函数发送请求头(headers函数)和html文档(cat函数)。
execute_cgi函数构造cgi_output和cgi_input2个管道，再fork出一进程，父进程负责与客户端之间的数据传输(读写),子进程通过cgi_input接收父进程接收来的信息，进行数据处理后，将要发送的信息通过cgi_output传递给父进程，父进程再发送给客户端。简而言之，父进程读写，子进程处理。
服务器代码
/* J. David's webserver */
/* This is a simple webserver.
* Created November 1999 by J. David Blackstone.
* CSE 4344 (Network concepts), Prof. Zeigler
* University of Texas at Arlington
*/
/* This program compiles for Sparc Solaris 2.6.
* To compile for Linux:
* 1) Comment out the #include line.
* 2) Comment out the line that defines the variable newthread.
* 3) Comment out the two lines that run pthread_create().
* 4) Uncomment the line that runs accept_request().
* 5) Remove -lsocket from the Makefile.
*/
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
union semun
{
int val;
struct semid_ds *buf;
unsigned short *arry;
};
static int sem_id = 0;
static int sem_id1 = 0;
static int set_semvalue(int,int);
static void del_semvalue(int);
static int semaphore_p(int);
static int semaphore_v(int);
//pthread_mutex_t mutex;
//sem_t father_sem; //整型
//sem_t son_sem;
#define ISspace(x) isspace((int)(x))
#define SERVER_STRING "Server: jdbhttpd/0.1.0\r\n"
clock_t start,end;
void accept_request(int);
void bad_request(int);
void cat(int, FILE *);
void cannot_execute(int);
void error_die(const char *);
void execute_cgi(int, const char *, const char *, const char *);
int get_line(int, char *, int);
void headers(int/*, const char **/);
void not_found(int);
void serve_file(int, const char *);
int startup(u_short *);
void unimplemented(int);
/**********************************************************************/
/* A request has caused a call to accept() on the server port to
* return. Process the request appropriately.
* Parameters: the socket connected to the client */
/**********************************************************************/
void accept_request(int client)
{
char buf[1024];
int numchars;
char method[255];
char url[255];
char path[512];
size_t i, j;
struct stat st;
int cgi = 0; /* becomes true if server decides this is a CGI program */
char *query_string = NULL;
/*得到请求的第一行*/
/*GET / HTTP/1.1\n*/
numchars = get_line(client, buf, sizeof(buf));
i = 0; j = 0;
/*把客户端的请求方法存到 method 数组*/
/*用空格终止*/
/*strcasecmp忽略大小写比较字符串*/
while (!ISspace(buf[j]) && (i < sizeof(method) - 1))
{
method[i] = buf[j];
i++; j++;
}
method[i] = '\0';
/*如果既不是 GET 又不是 POST 则无法处理 */
if (strcasecmp(method, "GET") && strcasecmp(method, "POST"))
{
unimplemented(client);
return;
}
/* POST 的时候开启 cgi */
if (strcasecmp(method, "POST") == 0)
{
printf("识别为post\n");
cgi = 1;
}
/*读取 url 地址*/
i = 0;
while (ISspace(buf[j]) && (j < sizeof(buf)))
j++;
/*仍然用空格终止*/
while (!ISspace(buf[j]) && (i < sizeof(url) - 1) && (j < sizeof(buf)))
{
/*存下 url */
url[i] = buf[j];
i++; j++;
}
url[i] = '\0';
/*处理 GET 方法*/
if (strcasecmp(method, "GET") == 0)
{
/* 待处理请求为 url */
query_string = url;
while ((*query_string != '?') && (*query_string != '\0'))
query_string++;
/* GET 方法特点，? 后面为参数*/
if (*query_string == '?')
{
/*开启 cgi */
cgi = 1;
*query_string = '\0';
query_string++;
}
}
/*格式化 url 到 path 数组，html 文件都在 htdocs 中*/
sprintf(path, "htdocs%s", url);
/*默认情况为 index.html */
if (path[strlen(path) - 1] == '/')
strcat(path, "index.html");
/*根据路径找到对应文件 */
if (stat(path, &st) == -1) {
/*把所有 headers 的信息都丢弃*/
printf("路径没找到文件\n");
while ((numchars > 0) && strcmp("\n", buf)) /* read & discard headers */
numchars = get_line(client, buf, sizeof(buf));
/*回应客户端找不到*/
not_found(client);
}
else
{
printf("路径找到文件\n");
printf("path:%s\n",path);
/*如果是个目录，则默认使用该目录下 index.html 文件*/
if ((st.st_mode & S_IFMT) == S_IFDIR)
{
// printf("6666\n");
strcat(path, "/index.html");
}
/*文件权限:分别是所有者可执行、群组可执行、其他可执行*/
if ((st.st_mode & S_IXUSR) || (st.st_mode & S_IXGRP) || (st.st_mode & S_IXOTH) )
cgi = 1;
/*不是 cgi,直接把服务器文件返回，否则执行 cgi */
if (!cgi)
{
printf("cgi=0,进入serve_file\n");
printf("path:%s\n",path);
serve_file(client, path);
}
else
{
printf("cgi=1,进入execute_cgi\n");
execute_cgi(client, path, method, query_string);
}
}
/*断开与客户端的连接（HTTP 特点：无连接）*/
close(client);
}
/**********************************************************************/
/* Inform the client that a request it has made has a problem.
* Parameters: client socket */
/**********************************************************************/
void bad_request(int client)
{
char buf[1024];
/*回应客户端错误的 HTTP 请求 */
sprintf(buf, "HTTP/1.0 400 BAD REQUEST\r\n");
send(client, buf, sizeof(buf), 0);
sprintf(buf, "Content-type: text/html\r\n");
send(client, buf, sizeof(buf), 0);
sprintf(buf, "\r\n");
send(client, buf, sizeof(buf), 0);
sprintf(buf, "Your browser sent a bad request, ");
send(client, buf, sizeof(buf), 0);
sprintf(buf, "such as a POST without a Content-Length.\r\n");
send(client, buf, sizeof(buf), 0);
}
/**********************************************************************/
/* Put the entire contents of a file out on a socket. This function
* is named after the UNIX "cat" command, because it might have been
* easier just to do something like pipe, fork, and exec("cat").
* Parameters: the client socket descriptor
* FILE pointer for the file to cat */
/**********************************************************************/
void cat(int client, FILE *resource)
{
char buf[1024];
printf("7777\n");
/*读取文件中的所有数据写到 socket */
fgets(buf, sizeof(buf), resource);
while (!feof(resource))
{
send(client, buf, strlen(buf), 0);
fgets(buf, sizeof(buf), resource);
}
printf("cat读取完毕\n");
}
/**********************************************************************/
/* Inform the client that a CGI script could not be executed.
* Parameter: the client socket descriptor. */
/**********************************************************************/
void cannot_execute(int client)
{
char buf[1024];
/* 回应客户端 cgi 无法执行*/
sprintf(buf, "HTTP/1.0 500 Internal Server Error\r\n");
send(client, buf, strlen(buf), 0);
sprintf(buf, "Content-type: text/html\r\n");
send(client, buf, strlen(buf), 0);
sprintf(buf, "\r\n");
send(client, buf, strlen(buf), 0);
sprintf(buf, "
Error prohibited CGI execution.\r\n");
send(client, buf, strlen(buf), 0);
}
/**********************************************************************/
/* Print out an error message with perror() (for system errors; based
* on value of errno, which indicates system call errors) and exit the
* program indicating an error. */
/**********************************************************************/
void error_die(const char *sc)
{
/*出错信息处理 */
perror(sc);
exit(1);
}
/**********************************************************************/
/* Execute a CGI script. Will need to set environment variables as
* appropriate.
* Parameters: client socket descriptor
* path to the CGI script */
/**********************************************************************/
void execute_cgi(int client, const char *path,
const char *method, const char *query_string)
{
printf("进入execute_cgi\n");
char buf[1024];
int cgi_output[2];
int cgi_input[2];
pid_t pid;
int status;
int i;
char c;
int numchars = 1;
int content_length = -1;
buf[0] = 'A'; buf[1] = '\0';
if (strcasecmp(method, "GET") == 0)
while ((numchars > 0) && strcmp("\n", buf)) /* read & discard headers */
numchars = get_line(client, buf, sizeof(buf));
else /* POST */
{
numchars = get_line(client, buf, sizeof(buf));
while ((numchars > 0) && strcmp("\n", buf))
{
buf[15] = '\0';/*切割方便比较*/
if (strcasecmp(buf, "Content-Length:") == 0)
printf("buf[16]=%c\n",buf[16]);
/*atoi函数为字符串转整型，这里取buf[16]的地址，为字符串转整型准备。*/
content_length = atoi(&(buf[16]));
numchars = get_line(client, buf, sizeof(buf));
}
if (content_length == -1) {
printf("bad_request\n");
bad_request(client);
return;
}
}
printf("测试bad_request content_length=%d\n",content_length);
sprintf(buf, "HTTP/1.0 200 OK\r\n");
send(client, buf, strlen(buf), 0);
if (pipe(cgi_output) < 0) {
cannot_execute(client);
return;
}
if (pipe(cgi_input) < 0) {
cannot_execute(client);
return;
}
sem_id = semget((key_t)1234, 1, 0666 | IPC_CREAT);
sem_id1 = semget((key_t)1235, 1, 0666 | IPC_CREAT);
if(!set_semvalue(sem_id,1))
{
fprintf(stderr, "Failed to initialize semaphore\n");
exit(EXIT_FAILURE);
}
if(!set_semvalue(sem_id1,0))
{
fprintf(stderr, "Failed to initialize semaphore\n");
exit(EXIT_FAILURE);
}
if ( (pid = fork()) < 0 ) {
cannot_execute(client);
return;
}
if (pid == 0) /* child: CGI script */
{
if(!semaphore_p(sem_id))
exit(EXIT_FAILURE);
// sem_wait(&son_sem);
// pthread_mutex_lock(&mutex);
printf("这是子进程,第一原子操作开始\n");
char meth_env[255];
char query_env[255];
char length_env[255];
dup2(cgi_output[1], 1);
dup2(cgi_input[0], 0);
close(cgi_output[0]);
close(cgi_input[1]);
sprintf(meth_env, "REQUEST_METHOD=%s", method);
putenv(meth_env);
if (strcasecmp(method, "GET") == 0) {
sprintf(query_env, "QUERY_STRING=%s", query_string);
putenv(query_env);
}
else { /* POST */
sprintf(length_env, "CONTENT_LENGTH=%d", content_length);
putenv(length_env);
}
//printf("第一原子操作完成\n");
if(!semaphore_v(sem_id1))
exit(EXIT_FAILURE);
// pthread_mutex_unlock(&mutex);
// sem_post(&father_sem);
//将信号量的值加一
// sem_wait(&son_sem);
// pthread_mutex_lock(&mutex);
if(!semaphore_p(sem_id))
exit(EXIT_FAILURE);
printf("服务器回应:\n");
// while (read(cgi_input[0], &c, 1) > 0)
char dd[30]={'\0'};
//gets(dd);
read(cgi_input[0], dd, sizeof(dd));
read(stdin,&dd,sizeof(dd));
printf("dd=%s\n",dd);
execl(path, path, NULL);
if(!semaphore_v(sem_id1))
exit(EXIT_FAILURE);
// pthread_mutex_unlock(&mutex);
exit(0);
} else {
printf("这是父进程，信号量初始化\n");
/* parent */
// printf("这是父进程,son_sem=%d,father_sem=%d\n",&son_sem,&father_sem);
// sem_wait(&father_sem);
// pthread_mutex_lock(&mutex);
if(!semaphore_p(sem_id1))
exit(EXIT_FAILURE);
printf("这是父进程 第二原子操作开始\n");
close(cgi_output[1]);
close(cgi_input[0]);
if (strcasecmp(method, "POST") == 0)
for (i = 0; i < content_length; i++) {
recv(client, &c, 1, 0);
printf("%c",c);/*不打\n换行符，无法显示？*/
write(cgi_input[1], &c, 1);
}
printf("recv完毕 第二原子操作结束\n");
if(!semaphore_v(sem_id))
exit(EXIT_FAILURE);
if(!semaphore_p(sem_id1))
exit(EXIT_FAILURE);
printf("父进程 第四原子操作开始\n");
// pthread_mutex_unlock(&mutex);
//将信号量的值加一
// sem_post(&son_sem);
// printf("son_sem+1,son_sem=%d\n",son_sem);
// sem_wait(&father_sem);
printf("send:\n");
char d[40]={'\0'};
int di=0;
while (read(cgi_output[0], &c, 1) > 0)
{
printf("%c",c);
d[di]=c;
di++;
}
d[++di]='\0';
send(client, d, sizeof(d), 0);
printf("send完毕\n");
close(cgi_output[0]);
close(cgi_input[1]);
printf("父进程 第四原子操作结束\n");
del_semvalue(sem_id);
del_semvalue(sem_id1);
waitpid(pid, &status, 0);
}
}
/**********************************************************************/
/* Get a line from a socket, whether the line ends in a newline,
* carriage return, or a CRLF combination. Terminates the string read
* with a null character. If no newline indicator is found before the
* end of the buffer, the string is terminated with a null. If any of
* the above three line terminators is read, the last character of the
* string will be a linefeed and the string will be terminated with a
* null character.
* Parameters: the socket descriptor
* the buffer to save the data in
* the size of the buffer
* Returns: the number of bytes stored (excluding null) */
/**********************************************************************/
int get_line(int sock, char *buf, int size)
{
int i = 0;
char c = '\0';
int n;
/*把终止条件统一为 \n 换行符，标准化 buf 数组*/
while ((i < size - 1) && (c != '\n'))
{
/*一次仅接收一个字节*/
n = recv(sock, &c, 1, 0);
/* DEBUG printf("%02X\n", c); */
if (n > 0)
{
/*上文已经将终止条件设定为\n，接下来考虑的是：如果是以\r\n为结束位和\r为结束位，该如何将其改为\n为结束位*/
/*对于\r为结束位，直接改为\n结束位*/
/*对于\r\n为结束位，将\r\n改为\n，作为结束位*/
/*收到 \r 则继续接收下个字节，因为换行符可能是 \r\n */
if (c == '\r')
{
/*MSG_PEEK撇一眼*/
/*使用 MSG_PEEK 标志使下一次读取依然可以得到这次读取的内容，可认为接收窗口不滑动*/
/*撇一眼判断是不是\r\n*/
n = recv(sock, &c, 1, MSG_PEEK);
/* DEBUG printf("%02X\n", c); */
/*但如果是换行符则把它吸收掉*/
if ((n > 0) && (c == '\n'))
recv(sock, &c, 1, 0);
else
c = '\n';
}
/*存到缓冲区*/
buf[i] = c;
i++;
}
else
c = '\n';
}
buf[i] = '\0';
/*返回 buf 数组大小*/
return(i);
}
/**********************************************************************/
/* Return the informational HTTP headers about a file. */
/* Parameters: the socket to print the headers on
* the name of the file */
/**********************************************************************/
void headers(int client/*, const char *filename*/)
{
char buf[1024];
int ret=0;
// (void)filename; /* could use filename to determine file type */
printf("headers开始\n");
strcpy(buf, "HTTP/1.0 200 OK\r\n");
ret=send(client, buf, strlen(buf), 0);
if(ret==-1)
{
printf("songshiqi\n");
perror("1send");
}
strcpy(buf, SERVER_STRING);
ret=send(client, buf, strlen(buf), 0);
if(ret==-1)
{
printf("songshiqi\n");
perror("2send");
}
printf("headers中场\n");
sprintf(buf, "Content-Type: text/html\r\n");
ret=send(client, buf, strlen(buf), 0);
if(ret==-1)
{
perror("3send");
}
strcpy(buf, "\r\n");
ret=send(client, buf, strlen(buf), 0);
if(ret==-1)
{
perror("4send");
}
printf("headers结束\n");
}
/**********************************************************************/
/* Give a client a 404 not found status message. */
/**********************************************************************/
void not_found(int client)
{
char buf[1024];
/* 404 页面 */
sprintf(buf, "HTTP/1.0 404 NOT FOUND\r\n");
send(client, buf, strlen(buf), 0);
/*服务器信息*/
sprintf(buf, SERVER_STRING);
send(client, buf, strlen(buf), 0);
sprintf(buf, "Content-Type: text/html\r\n");
send(client, buf, strlen(buf), 0);
sprintf(buf, "\r\n");
send(client, buf, strlen(buf), 0);
sprintf(buf, "
Not Found \r\n");
send(client, buf, strlen(buf), 0);
sprintf(buf, "The server could not fulfill\r\n");
send(client, buf, strlen(buf), 0);
sprintf(buf, "your request because the resource specified\r\n");
send(client, buf, strlen(buf), 0);
sprintf(buf, "is unavailable or nonexistent.\r\n");
send(client, buf, strlen(buf), 0);
sprintf(buf, "\r\n");
send(client, buf, strlen(buf), 0);
}
/**********************************************************************/
/* Send a regular file to the client. Use headers, and report
* errors to client if they occur.
* Parameters: a pointer to a file structure produced from the socket
* file descriptor
* the name of the file to serve */
/**********************************************************************/
void serve_file(int client, const char *filename)
{
FILE *resource = NULL;
int numchars = 1;
char buf[1024];
buf[0] = 'A'; buf[1] = '\0';
while ((numchars > 0) && strcmp("\n", buf)) /* read & discard headers */
numchars = get_line(client, buf, sizeof(buf));
resource = fopen(filename, "r");
if (resource == NULL)
not_found(client);
else
{
printf("sesource不为0,即将执行headers和cat\n");
headers(client/*, filename*/);
cat(client, resource);
}
//sleep(1);
fclose(resource);
printf("线程已执行完毕\n");
end = clock();
printf("songshiqi\n");
printf("time=%f\n",(double)(end-start)/1000);
}
/**********************************************************************/
/* This function starts the process of listening for web connections
* on a specified port. If the port is 0, then dynamically allocate a
* port and modify the original port variable to reflect the actual
* port.
* Parameters: pointer to variable containing the port to connect on
* Returns: the socket */
/**********************************************************************/
int startup(u_short *port)
{
int httpd = 0;
struct sockaddr_in name;
httpd = socket(PF_INET, SOCK_STREAM, 0);/*创建一个TCP套接字*/
if (httpd == -1)
error_die("socket");
memset(&name, 0, sizeof(name));
name.sin_family = AF_INET;
name.sin_port = htons(11004);/*若端口为0,则系统随机选择一个未被使用的端口号,这里改为指定一个空闲的端口号*/
name.sin_addr.s_addr = htonl(INADDR_ANY);/*系统自动填入本机IP*/
if (bind(httpd, (struct sockaddr *)&name, sizeof(name)) < 0)/*socket绑定到制定的IP地址和端口号*/
error_die("bind");
if (*port == 0) /* if dynamically allocating a port */
{
int namelen = sizeof(name);
/*获取主机名,从而获取分配的端口号*/
if (getsockname(httpd, (struct sockaddr *)&name, (socklen_t *)&namelen) == -1)
error_die("getsockname");
*port = ntohs(name.sin_port);
}
if (listen(httpd, 5) < 0)/*监听连接请求。5--backlog:系统维护的一个跟踪握手未完成的连接的队列的大小*/
error_die("listen");
return(httpd);
}
/**********************************************************************/
/* Inform the client that the requested web method has not been
* implemented.
* Parameter: the client socket */
/**********************************************************************/
void unimplemented(int client)
{
char buf[1024];
/* HTTP method 不被支持*/
sprintf(buf, "HTTP/1.0 501 Method Not Implemented\r\n");
send(client, buf, strlen(buf), 0);
/*服务器信息*/
sprintf(buf, SERVER_STRING);
send(client, buf, strlen(buf), 0);
sprintf(buf, "Content-Type: text/html\r\n");
send(client, buf, strlen(buf), 0);
sprintf(buf, "\r\n");
send(client, buf, strlen(buf), 0);
sprintf(buf, "
Method Not Implemented\r\n");
send(client, buf, strlen(buf), 0);
sprintf(buf, " \r\n");
send(client, buf, strlen(buf), 0);
sprintf(buf, "HTTP request method not supported.\r\n");
send(client, buf, strlen(buf), 0);
sprintf(buf, "\r\n");
send(client, buf, strlen(buf), 0);
}
/**********************************************************************/
int main(void)
{
// pthread_mutex_init(&mutex, NULL);
//初始化信号量
// sem_init(&son_sem, 1, 0); //将son_sem值置为1
// sem_init(&father_sem, 1, 0); //将father_sem值置为0
//sem_post(&father_sem);
int server_sock = -1;
u_short port = 0;
int client_sock = -1;
struct sockaddr_in client_name;
int client_name_len = sizeof(client_name);
pthread_t newthread;
/*在对应端口建立 httpd 服务*/
server_sock = startup(&port);
printf("httpd running on port %d\n", port);
int songshiqi=1;
while (1)
{
/*套接字收到客户端连接请求*/
client_sock = accept(server_sock,(struct sockaddr *)&client_name,&client_name_len);
printf("there have a client,num %d\n",songshiqi);
start = clock();
songshiqi++;
if (client_sock == -1)
error_die("accept");
/*派生新线程用 accept_request 函数处理新请求*/
/* accept_request(client_sock); */
if (pthread_create(&newthread , NULL, accept_request, client_sock) != 0)
perror("pthread_create");
// sleep(1);
// exit(1);
}
close(server_sock);
return(0);
}
static int set_semvalue(int sem_id,int i)
{
//用于初始化信号量，在使用信号量前必须这样做
union semun sem_union;
sem_union.val = i;
if(semctl(sem_id, 0, SETVAL, sem_union) == -1)
return 0;
return 1;
}
static void del_semvalue(int sem_id)
{
//删除信号量
union semun sem_union;
if(semctl(sem_id, 0, IPC_RMID, sem_union) == -1)
fprintf(stderr, "Failed to delete semaphore\n");
}
static int semaphore_p(int sem_id)
{
//对信号量做减1操作，即等待P（sv）
struct sembuf sem_b;
sem_b.sem_num = 0;
sem_b.sem_op = -1;//P()
sem_b.sem_flg = SEM_UNDO;
if(semop(sem_id, &sem_b, 1) == -1)
{
fprintf(stderr, "semaphore_p failed\n");
return 0;
}
return 1;
}
static int semaphore_v(int sem_id)
{
//这是一个释放操作，它使信号量变为可用，即发送信号V（sv）
struct sembuf sem_b;
sem_b.sem_num = 0;
sem_b.sem_op = 1;//V()
sem_b.sem_flg = SEM_UNDO;
if(semop(sem_id, &sem_b, 1) == -1)
{
fprintf(stderr, "semaphore_v failed\n");
return 0;
}
return 1;
}
客户端代码
#include
#include
#include
#include
#include
#include
#include
/*服务器发送了3个包，客户端接收一个包，但量一样，保证量。*/
/*当前读取，当前读取，可能会漏读很多*/
/*关注recv阻塞*/
clock_t start,end;
int main(int argc, char *argv[])
{
int sockfd;
int len;
struct sockaddr_in address;
int result;
char buf[] = "POST / HTTP/1.1\nContent-Length:119\n\nsongshiqixieaoxieao\n\n";
char get[1024] = {0};
sockfd = socket(AF_INET, SOCK_STREAM, 0);
address.sin_family = AF_INET;
address.sin_addr.s_addr = inet_addr("127.0.0.1");/*本机IP地址*/
address.sin_port = htons(11004);/*tinyhttpd的端口*/
len = sizeof(address);
result = connect(sockfd, (struct sockaddr *)&address, len);
if (result == -1)
{
perror("oops:client:");
_exit(1);
}
start = clock();
write(sockfd,buf, sizeof(buf));/*发送请求*/
// time_t start,end;
// start =time(NULL);//or time(&start);
int ret=1;
int myalready=0;
int songshiqi=0;
sleep(2);
//ret=read(sockfd,get+myalready, sizeof(get));/*接收返回数据*/
//songshiqi++;
// myalready=+ret;
while(/*myalready<240*/1)
{
ret=read(sockfd,get+myalready, sizeof(get));/*接收返回数据*/
if(ret==-1)
{
perror("ret");
break;
}
//sleep(1);
songshiqi++;
myalready=+ret;
printf("songshiqi=%d ret=%d myalready=%d\n",songshiqi,ret,myalready);
}
end =clock();
printf("time=%lf\n",(double)(end-start)/1000);
/*打印返回数据*/
printf("-----------------------------show buffer -----------------------------\n");
printf("%s",get);
printf("----------------------------------------------------------------------\n");
close(sockfd);
_exit(0);
}