diff --git a/server-exp2/weblet b/server-exp2/weblet
index 269d4c9..50a75f7 100755
Binary files a/server-exp2/weblet and b/server-exp2/weblet differ
diff --git a/server-exp2/webletsp b/server-exp2/webletsp
index 2816b0b..41afc8f 100755
Binary files a/server-exp2/webletsp and b/server-exp2/webletsp differ
diff --git a/server-exp2/webletsp.c b/server-exp2/webletsp.c
index 073c262..7ce41b7 100644
--- a/server-exp2/webletsp.c
+++ b/server-exp2/webletsp.c
@@ -50,10 +50,10 @@ typedef void (*sighandler_t) (int sig) ;
 
 void Signal(int sig, sighandler_t handler){
     struct sigaction sa;
-    sa.sa_handler = sigchld_handler;
+    sa.sa_handler = handler;
     sigemptyset(&sa.sa_mask);
     sa.sa_flags = SA_RESTART;  // 确保被信号中断的系统调用自动重启
-    sigaction(SIGCHLD, &sa, NULL);
+    sigaction(sig, &sa, NULL);
 }
 
 
@@ -80,6 +80,9 @@ int main(int argc, char **argv)
     }
     port = atoi(argv[1]);
 
+    //设置SIGHLD的信号处理函数，用于收割结束的子进程
+    Signal(SIGCHLD, sigchld_handler);
+    Signal(SIGPIPE, SIG_IGN);
     listen_sock = open_listen_sock(port);
 
     for (hit=1; ; hit++) {             //hit为第几次请求，或第几次http事务
diff --git a/server-exp2/webletst b/server-exp2/webletst
index 1f4cef4..9f8546a 100755
Binary files a/server-exp2/webletst and b/server-exp2/webletst differ
diff --git a/server-exp2/实验2任务报告（多进程和多线程模型）(1).docx b/server-exp2/实验2任务报告（多进程和多线程模型）(1).docx
index 21b6958..b9a1cf4 100644
Binary files a/server-exp2/实验2任务报告（多进程和多线程模型）(1).docx and b/server-exp2/实验2任务报告（多进程和多线程模型）(1).docx differ
diff --git a/server-exp3/cgi-bin/add b/server-exp3/cgi-bin/add
new file mode 100644
index 0000000..6c58671
Binary files /dev/null and b/server-exp3/cgi-bin/add differ
diff --git a/server-exp3/cgi-bin/add.c b/server-exp3/cgi-bin/add.c
new file mode 100644
index 0000000..2d32e7a
--- /dev/null
+++ b/server-exp3/cgi-bin/add.c
@@ -0,0 +1,27 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#define MAXLINE 8192
+
+int main(void) {
+    char *buf, *p;
+    char content[MAXLINE];
+    int n1=0, n2=0;
+
+    /* Extract the two arguments from standard input */
+    scanf("%d&%d", &n1, &n2);
+    
+    /* Make the response body */
+    sprintf(content, "Welcome to add.com: ");
+    sprintf(content, "%sTHE Internet addition portal.\r\n<p>", content);
+    sprintf(content, "%sThe answer is: %d + %d = %d\r\n<p>", 
+	    content, n1, n2, n1 + n2);
+    sprintf(content, "%sThanks for visiting!\r\n", content);
+
+    /* Generate the HTTP response */
+    printf("Content-length: %d\r\n", (int) strlen(content));
+    printf("Content-type: text/html\r\n\r\n");
+    printf("%s", content);
+    fflush(stdout);
+    exit(0);
+}
diff --git a/server-exp3/common.c b/server-exp3/common.c
new file mode 100644
index 0000000..8c27c5b
--- /dev/null
+++ b/server-exp3/common.c
@@ -0,0 +1,243 @@
+/* $begin common.c */
+
+#include "common.h"
+
+
+
+/*********************************************************************
+ * The Rio package - robust I/O functions
+ **********************************************************************/
+/*
+ * rio_readn - robustly read n bytes (unbuffered)
+ */
+/* $begin rio_readn */
+ssize_t rio_readn(int fd, void *usrbuf, size_t n) 
+{
+    size_t nleft = n;
+    ssize_t nread;
+    char *bufp = usrbuf;
+
+    while (nleft > 0) {
+	if ((nread = read(fd, bufp, nleft)) < 0) {
+	    if (errno == EINTR) /* interrupted by sig handler return */
+		nread = 0;      /* and call read() again */
+	    else
+		return -1;      /* errno set by read() */ 
+	} 
+	else if (nread == 0)
+	    break;              /* EOF */
+	nleft -= nread;
+	bufp += nread;
+    }
+    return (n - nleft);         /* return >= 0 */
+}
+/* $end rio_readn */
+
+/*
+ * rio_writen - robustly write n bytes (unbuffered)
+ */
+/* $begin rio_writen */
+ssize_t rio_writen(int fd, void *usrbuf, size_t n) 
+{
+    size_t nleft = n;
+    ssize_t nwritten;
+    char *bufp = usrbuf;
+
+    while (nleft > 0) {
+	if ((nwritten = write(fd, bufp, nleft)) <= 0) {
+	    if (errno == EINTR)  /* interrupted by sig handler return */
+		nwritten = 0;    /* and call write() again */
+	    else
+		return -1;       /* errorno set by write() */
+	}
+	nleft -= nwritten;
+	bufp += nwritten;
+    }
+    return n;
+}
+/* $end rio_writen */
+
+
+/* 
+ * rio_read - This is a wrapper for the Unix read() function that
+ *    transfers min(n, rio_cnt) bytes from an internal buffer to a user
+ *    buffer, where n is the number of bytes requested by the user and
+ *    rio_cnt is the number of unread bytes in the internal buffer. On
+ *    entry, rio_read() refills the internal buffer via a call to
+ *    read() if the internal buffer is empty.
+ */
+/* $begin rio_read */
+static ssize_t rio_read(rio_t *rp, char *usrbuf, size_t n)
+{
+    int cnt;
+
+    while (rp->rio_cnt <= 0) {  /* refill if buf is empty */
+	rp->rio_cnt = read(rp->rio_fd, rp->rio_buf, 
+			   sizeof(rp->rio_buf));
+	if (rp->rio_cnt < 0) {
+	    if (errno != EINTR) /* interrupted by sig handler return */
+		return -1;
+	}
+	else if (rp->rio_cnt == 0)  /* EOF */
+	    return 0;
+	else 
+	    rp->rio_bufptr = rp->rio_buf; /* reset buffer ptr */
+    }
+
+    /* Copy min(n, rp->rio_cnt) bytes from internal buf to user buf */
+    cnt = n;          
+    if (rp->rio_cnt < n)   
+	cnt = rp->rio_cnt;
+    memcpy(usrbuf, rp->rio_bufptr, cnt);
+    rp->rio_bufptr += cnt;
+    rp->rio_cnt -= cnt;
+    return cnt;
+}
+/* $end rio_read */
+
+/*
+ * rio_readinitb - Associate a descriptor with a read buffer and reset buffer
+ */
+/* $begin rio_readinitb */
+void rio_readinitb(rio_t *rp, int fd) 
+{
+    rp->rio_fd = fd;  
+    rp->rio_cnt = 0;  
+    rp->rio_bufptr = rp->rio_buf;
+}
+/* $end rio_readinitb */
+
+/*
+ * rio_readnb - Robustly read n bytes (buffered)
+ */
+/* $begin rio_readnb */
+ssize_t rio_readnb(rio_t *rp, void *usrbuf, size_t n) 
+{
+    size_t nleft = n;
+    ssize_t nread;
+    char *bufp = usrbuf;
+    
+    while (nleft > 0) {
+	if ((nread = rio_read(rp, bufp, nleft)) < 0) {
+	    if (errno == EINTR) /* interrupted by sig handler return */
+		nread = 0;      /* call read() again */
+	    else
+		return -1;      /* errno set by read() */ 
+	} 
+	else if (nread == 0)
+	    break;              /* EOF */
+	nleft -= nread;
+	bufp += nread;
+    }
+    return (n - nleft);         /* return >= 0 */
+}
+/* $end rio_readnb */
+
+/* 
+ * rio_readlineb - robustly read a text line (buffered)
+ */
+/* $begin rio_readlineb */
+ssize_t rio_readlineb(rio_t *rp, void *usrbuf, size_t maxlen) 
+{
+    int n, rc;
+    char c, *bufp = usrbuf;
+
+    for (n = 1; n < maxlen; n++) { 
+	if ((rc = rio_read(rp, &c, 1)) == 1) {
+	    *bufp++ = c;
+	    if (c == '\n')
+		break;
+	} else if (rc == 0) {
+	    if (n == 1)
+		return 0; /* EOF, no data read */
+	    else
+		break;    /* EOF, some data was read */
+	} else
+	    return -1;	  /* error */
+    }
+    *bufp = 0;
+    return n;
+}
+/* $end rio_readlineb */
+
+/**********************************
+ * Wrappers for robust I/O routines
+ **********************************/
+
+
+/******************************** 
+ * Client/server helper functions
+ ********************************/
+/*
+ * open_client_sock - open connection to server at <hostname, port> 
+ *   and return a socket descriptor ready for reading and writing.
+ *   Returns -1 and sets errno on Unix error. 
+ *   Returns -2 and sets h_errno on DNS (gethostbyname) error.
+ */
+/* $begin open_client_sock */
+int open_client_sock(char *hostname, int port) 
+{
+    int client_sock;
+    struct hostent *hp;
+    struct sockaddr_in serveraddr;
+
+    if ((client_sock = socket(AF_INET, SOCK_STREAM, 0)) < 0)
+	return -1; /* check errno for cause of error */
+
+    /* Fill in the server's IP address and port */
+    if ((hp = gethostbyname(hostname)) == NULL)
+	return -2; /* check h_errno for cause of error */
+    bzero((char *) &serveraddr, sizeof(serveraddr));
+    serveraddr.sin_family = AF_INET;
+    bcopy((char *)hp->h_addr_list[0], 
+	  (char *)&serveraddr.sin_addr.s_addr, hp->h_length);
+    serveraddr.sin_port = htons(port);
+
+    /* Establish a connection with the server */
+    if (connect(client_sock, (SA *) &serveraddr, sizeof(serveraddr)) < 0)
+	return -1;
+    return client_sock;
+}
+/* $end open_client_sock */
+
+/*  
+ * open_listen_sock - open and return a listening socket on port
+ *     Returns -1 and sets errno on Unix error.
+ */
+/* $begin open_listen_sock */
+int open_listen_sock(int port) 
+{
+    int listen_sock, optval=1;
+    struct sockaddr_in serveraddr;
+  
+    /* Create a socket descriptor */
+    if ((listen_sock = socket(AF_INET, SOCK_STREAM, 0)) < 0)
+	return -1;
+ 
+    /* Eliminates "Address already in use" error from bind. */
+    if (setsockopt(listen_sock, SOL_SOCKET, SO_REUSEADDR, 
+		   (const void *)&optval , sizeof(int)) < 0)
+	return -1;
+
+    /* Listen_sock will be an endpoint for all requests to port
+       on any IP address for this host */
+    bzero((char *) &serveraddr, sizeof(serveraddr));
+    serveraddr.sin_family = AF_INET; 
+    serveraddr.sin_addr.s_addr = htonl(INADDR_ANY); 
+    serveraddr.sin_port = htons((unsigned short)port); 
+    if (bind(listen_sock, (SA *)&serveraddr, sizeof(serveraddr)) < 0)
+	return -1;
+
+    /* Make it a listening socket ready to accept connection requests */
+    if (listen(listen_sock, LISTENQ) < 0)
+	return -1;
+    return listen_sock;
+}
+/* $end open_listen_sock */
+
+
+/* $end wrapper.c */
+
+
+
+
diff --git a/server-exp3/common.h b/server-exp3/common.h
new file mode 100644
index 0000000..edc667c
--- /dev/null
+++ b/server-exp3/common.h
@@ -0,0 +1,78 @@
+/* $begin common.h */
+#ifndef __COMMON_H__
+#define __COMMON_H__
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+#include <setjmp.h>
+#include <signal.h>
+#include <sys/time.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <sys/mman.h>
+#include <errno.h>
+#include <math.h>
+#include <pthread.h>
+#include <semaphore.h>
+#include <sys/socket.h>
+#include <netdb.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <limits.h>
+#include <sys/types.h> 
+#include <sys/ipc.h> 
+#include <sys/msg.h>
+#include <sys/shm.h>
+#include <sys/sem.h>
+#include <ctype.h>
+#include <sys/prctl.h>
+#include <stdbool.h>
+
+/* Default file permissions are DEF_MODE & ~DEF_UMASK */
+/* $begin createmasks */
+#define DEF_MODE   S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH
+#define DEF_UMASK  S_IWGRP|S_IWOTH
+/* $end createmasks */
+
+/* Simplifies calls to bind(), connect(), and accept() */
+/* $begin sockaddrdef */
+typedef struct sockaddr SA;
+/* $end sockaddrdef */
+
+/* Persistent state for the robust I/O (Rio) package */
+/* $begin rio_t */
+#define RIO_BUFSIZE 8192
+typedef struct {
+    int rio_fd;                /* descriptor for this internal buf */
+    int rio_cnt;               /* unread bytes in internal buf */
+    char *rio_bufptr;          /* next unread byte in internal buf */
+    char rio_buf[RIO_BUFSIZE]; /* internal buffer */
+} rio_t;
+/* $end rio_t */
+
+/* External variables */
+extern int h_errno;    /* defined by BIND for DNS errors */ 
+extern char **environ; /* defined by libc */
+
+/* Misc constants */
+#define	MAXLINE	 8192  /* max text line length */
+#define MAXBUF   8192  /* max I/O buffer size */
+#define LISTENQ  1024  /* second argument to listen() */
+
+/* Rio (Robust I/O) package */
+ssize_t rio_readn(int fd, void *usrbuf, size_t n);
+ssize_t rio_writen(int fd, void *usrbuf, size_t n);
+void rio_readinitb(rio_t *rp, int fd); 
+ssize_t	rio_readnb(rio_t *rp, void *usrbuf, size_t n);
+ssize_t	rio_readlineb(rio_t *rp, void *usrbuf, size_t maxlen);
+
+/* Client/server helper functions */
+int open_client_sock(char *hostname, int portno);
+int open_listen_sock(int portno);
+
+#endif /* __COMMON_H__ */
+/* $end common.h */
diff --git a/server-exp3/example.jpg b/server-exp3/example.jpg
new file mode 100644
index 0000000..3b09138
Binary files /dev/null and b/server-exp3/example.jpg differ
diff --git a/server-exp3/favicon.ico b/server-exp3/favicon.ico
new file mode 100644
index 0000000..b8c2f89
Binary files /dev/null and b/server-exp3/favicon.ico differ
diff --git a/server-exp3/index.html b/server-exp3/index.html
new file mode 100644
index 0000000..fcc9db0
--- /dev/null
+++ b/server-exp3/index.html
@@ -0,0 +1,13 @@
+<html>
+	<head>
+		<link rel="shortcut icon" href="favicon.ico" type="image/x-icon"/>
+		<title>the example web</title>
+	</head>
+	<body>
+		<H1>webserver test page</H1>
+		<p>
+			Not pretty but should prove that webserver works:-)
+		<p>
+		<IMG SRC="example.jpg">
+	</body>
+</html>
diff --git a/server-exp3/run.log b/server-exp3/run.log
new file mode 100644
index 0000000..1212f43
--- /dev/null
+++ b/server-exp3/run.log
@@ -0,0 +1,7 @@
+235735 fetches, 5 max parallel, 4.51969e+07 bytes, in 20 seconds
+191.728 mean bytes/connection
+11786.7 fetches/sec, 2.25985e+06 bytes/sec
+msecs/connect: 0.0682447 mean, 1.824 max, 0.018 min
+msecs/first-response: 0.323851 mean, 2.544 max, 0.054 min
+HTTP response codes:
+  code 200 -- 235735
diff --git a/server-exp3/server_pool.log b/server-exp3/server_pool.log
new file mode 100644
index 0000000..e69de29
diff --git a/server-exp3/t1.txt b/server-exp3/t1.txt
new file mode 100644
index 0000000..f885819
--- /dev/null
+++ b/server-exp3/t1.txt
@@ -0,0 +1,6 @@
+hello 
+world
+dgut
+computer
+Hello
+WORLD
diff --git a/server-exp3/t2.txt b/server-exp3/t2.txt
new file mode 100644
index 0000000..f885819
--- /dev/null
+++ b/server-exp3/t2.txt
@@ -0,0 +1,6 @@
+hello 
+world
+dgut
+computer
+Hello
+WORLD
diff --git a/server-exp3/test.html b/server-exp3/test.html
new file mode 100644
index 0000000..9161126
--- /dev/null
+++ b/server-exp3/test.html
@@ -0,0 +1,8 @@
+<html>
+<head>
+<title>a simple page for testing tiny</title>
+<head>
+<body>
+Hello World
+</body>
+</html>
\ No newline at end of file
diff --git a/server-exp3/thpool.c b/server-exp3/thpool.c
new file mode 100644
index 0000000..1b4d079
--- /dev/null
+++ b/server-exp3/thpool.c
@@ -0,0 +1,474 @@
+/* ********************************
+ * Author:       Johan Hanssen Seferidis
+ * License:	     MIT
+ * Description:  Library providing a threading pool where you can add
+ *               work. For usage, check the thpool.h file or README.md
+ *
+ */
+/** @file thpool.h */ /*
+                       *
+                       ********************************/
+
+#if defined(__APPLE__)
+#include <AvailabilityMacros.h>
+#else
+#ifndef _POSIX_C_SOURCE
+#define _POSIX_C_SOURCE 200809L
+#endif
+#ifndef _XOPEN_SOURCE
+#define _XOPEN_SOURCE 500
+#endif
+#endif
+#include <errno.h>
+#include <pthread.h>
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <time.h>
+#include <unistd.h>
+#if defined(__linux__)
+#include <sys/prctl.h>
+#endif
+#if defined(__FreeBSD__) || defined(__OpenBSD__)
+#include <pthread_np.h>
+#endif
+
+#include "thpool.h"
+
+#ifdef THPOOL_DEBUG
+#define THPOOL_DEBUG 1
+#else
+#define THPOOL_DEBUG 0
+#endif
+
+#if !defined(DISABLE_PRINT) || defined(THPOOL_DEBUG)
+#define err(str) fprintf(stderr, str)
+#else
+#define err(str)
+#endif
+
+#ifndef THPOOL_THREAD_NAME
+#define THPOOL_THREAD_NAME thpool
+#endif
+
+#define STRINGIFY(x) #x
+#define TOSTRING(x) STRINGIFY(x)
+
+static volatile int threads_keepalive;
+static volatile int threads_on_hold;
+
+/* ========================== STRUCTURES ============================ */
+
+
+/* ========================== PROTOTYPES ============================ */
+
+static int thread_init(thpool_* thpool_p, struct thread** thread_p, int id);
+static void* thread_do(struct thread* thread_p);
+static void thread_hold(int sig_id);
+static void thread_destroy(struct thread* thread_p);
+
+static int jobqueue_init(jobqueue* jobqueue_p);
+static void jobqueue_clear(jobqueue* jobqueue_p);
+static void jobqueue_push(jobqueue* jobqueue_p, struct job* newjob_p);
+static struct job* jobqueue_pull(jobqueue* jobqueue_p);
+static void jobqueue_destroy(jobqueue* jobqueue_p);
+
+static void bsem_init(struct bsem* bsem_p, int value);
+static void bsem_reset(struct bsem* bsem_p);
+static void bsem_post(struct bsem* bsem_p);
+static void bsem_post_all(struct bsem* bsem_p);
+static void bsem_wait(struct bsem* bsem_p);
+
+/* ========================== THREADPOOL ============================ */
+
+/* Initialise thread pool */
+struct thpool_* thpool_init(int num_threads) {
+    threads_on_hold = 0;
+    threads_keepalive = 1;
+
+    if (num_threads < 0) {
+        num_threads = 0;
+    }
+
+    /* Make new thread pool */
+    thpool_* thpool_p;
+    thpool_p = (struct thpool_*)malloc(sizeof(struct thpool_));
+    if (thpool_p == NULL) {
+        err("thpool_init(): Could not allocate memory for thread pool\n");
+        return NULL;
+    }
+    thpool_p->num_threads_alive = 0;
+    thpool_p->num_threads_working = 0;
+
+    /* Initialise the job queue */
+    if (jobqueue_init(&thpool_p->jobqueue) == -1) {
+        err("thpool_init(): Could not allocate memory for job queue\n");
+        free(thpool_p);
+        return NULL;
+    }
+
+    /* Make threads in pool */
+    thpool_p->threads = (struct thread**)malloc(num_threads * sizeof(struct thread*));
+    if (thpool_p->threads == NULL) {
+        err("thpool_init(): Could not allocate memory for threads\n");
+        jobqueue_destroy(&thpool_p->jobqueue);
+        free(thpool_p);
+        return NULL;
+    }
+
+    pthread_mutex_init(&(thpool_p->thcount_lock), NULL);
+    pthread_cond_init(&thpool_p->threads_all_idle, NULL);
+
+    /* Thread init */
+    int n;
+    for (n = 0; n < num_threads; n++) {
+        thread_init(thpool_p, &thpool_p->threads[n], n);
+#if THPOOL_DEBUG
+        printf("THPOOL_DEBUG: Created thread %d in pool \n", n);
+#endif
+    }
+
+    /* Wait for threads to initialize */
+    while (thpool_p->num_threads_alive != num_threads) {
+    }
+
+    return thpool_p;
+}
+
+/* Add work to the thread pool */
+int thpool_add_work(thpool_* thpool_p, void (*function_p)(void*), void* arg_p) {
+    job* newjob;
+
+    newjob = (struct job*)malloc(sizeof(struct job));
+    if (newjob == NULL) {
+        err("thpool_add_work(): Could not allocate memory for new job\n");
+        return -1;
+    }
+
+    /* add function and argument */
+    newjob->function = function_p;
+    newjob->arg = arg_p;
+
+    /* add job to queue */
+    jobqueue_push(&thpool_p->jobqueue, newjob);
+
+    return 0;
+}
+
+/* Wait until all jobs have finished */
+void thpool_wait(thpool_* thpool_p) {
+    pthread_mutex_lock(&thpool_p->thcount_lock);
+    while (thpool_p->jobqueue.len || thpool_p->num_threads_working) {
+        pthread_cond_wait(&thpool_p->threads_all_idle, &thpool_p->thcount_lock);
+    }
+    pthread_mutex_unlock(&thpool_p->thcount_lock);
+}
+
+/* Destroy the threadpool */
+void thpool_destroy(thpool_* thpool_p) {
+    /* No need to destroy if it's NULL */
+    if (thpool_p == NULL) return;
+
+    volatile int threads_total = thpool_p->num_threads_alive;
+
+    /* End each thread 's infinite loop */
+    threads_keepalive = 0;
+
+    /* Give one second to kill idle threads */
+    double TIMEOUT = 1.0;
+    time_t start, end;
+    double tpassed = 0.0;
+    time(&start);
+    while (tpassed < TIMEOUT && thpool_p->num_threads_alive) {
+        bsem_post_all(thpool_p->jobqueue.has_jobs);
+        time(&end);
+        tpassed = difftime(end, start);
+    }
+
+    /* Poll remaining threads */
+    while (thpool_p->num_threads_alive) {
+        bsem_post_all(thpool_p->jobqueue.has_jobs);
+        sleep(1);
+    }
+
+    /* Job queue cleanup */
+    jobqueue_destroy(&thpool_p->jobqueue);
+    /* Deallocs */
+    int n;
+    for (n = 0; n < threads_total; n++) {
+        thread_destroy(thpool_p->threads[n]);
+    }
+    free(thpool_p->threads);
+    free(thpool_p);
+}
+
+/* Pause all threads in threadpool */
+void thpool_pause(thpool_* thpool_p) {
+    int n;
+    for (n = 0; n < thpool_p->num_threads_alive; n++) {
+        pthread_kill(thpool_p->threads[n]->pthread, SIGUSR1);
+    }
+}
+
+/* Resume all threads in threadpool */
+void thpool_resume(thpool_* thpool_p) {
+    // resuming a single threadpool hasn't been
+    // implemented yet, meanwhile this suppresses
+    // the warnings
+    (void)thpool_p;
+
+    threads_on_hold = 0;
+}
+
+int thpool_num_threads_working(thpool_* thpool_p) { return thpool_p->num_threads_working; }
+
+/* ============================ THREAD ============================== */
+
+/* Initialize a thread in the thread pool
+ *
+ * @param thread        address to the pointer of the thread to be created
+ * @param id            id to be given to the thread
+ * @return 0 on success, -1 otherwise.
+ */
+static int thread_init(thpool_* thpool_p, struct thread** thread_p, int id) {
+    *thread_p = (struct thread*)malloc(sizeof(struct thread));
+    if (*thread_p == NULL) {
+        err("thread_init(): Could not allocate memory for thread\n");
+        return -1;
+    }
+
+    (*thread_p)->thpool_p = thpool_p;
+    (*thread_p)->id = id;
+
+    pthread_create(&(*thread_p)->pthread, NULL, (void* (*)(void*))thread_do, (*thread_p));
+    pthread_detach((*thread_p)->pthread);
+    return 0;
+}
+
+/* Sets the calling thread on hold */
+static void thread_hold(int sig_id) {
+    (void)sig_id;
+    threads_on_hold = 1;
+    while (threads_on_hold) {
+        sleep(1);
+    }
+}
+
+/* What each thread is doing
+ *
+ * In principle this is an endless loop. The only time this loop gets interrupted is once
+ * thpool_destroy() is invoked or the program exits.
+ *
+ * @param  thread        thread that will run this function
+ * @return nothing
+ */
+static void* thread_do(struct thread* thread_p) {
+    /* Set thread name for profiling and debugging */
+    char thread_name[16] = {0};
+
+    snprintf(thread_name, 16, TOSTRING(THPOOL_THREAD_NAME) "-%d", thread_p->id);
+
+#if defined(__linux__)
+    /* Use prctl instead to prevent using _GNU_SOURCE flag and implicit declaration */
+    prctl(PR_SET_NAME, thread_name);
+#elif defined(__APPLE__) && defined(__MACH__)
+    pthread_setname_np(thread_name);
+#elif defined(__FreeBSD__) || defined(__OpenBSD__)
+    pthread_set_name_np(thread_p->pthread, thread_name);
+#else
+    err("thread_do(): pthread_setname_np is not supported on this system");
+#endif
+
+    /* Assure all threads have been created before starting serving */
+    thpool_* thpool_p = thread_p->thpool_p;
+
+    /* Register signal handler */
+    struct sigaction act;
+    sigemptyset(&act.sa_mask);
+    act.sa_flags = SA_ONSTACK;
+    act.sa_handler = thread_hold;
+    if (sigaction(SIGUSR1, &act, NULL) == -1) {
+        err("thread_do(): cannot handle SIGUSR1");
+    }
+
+    /* Mark thread as alive (initialized) */
+    pthread_mutex_lock(&thpool_p->thcount_lock);
+    thpool_p->num_threads_alive += 1;
+    pthread_mutex_unlock(&thpool_p->thcount_lock);
+
+    while (threads_keepalive) {
+        bsem_wait(thpool_p->jobqueue.has_jobs);
+
+        if (threads_keepalive) {
+            pthread_mutex_lock(&thpool_p->thcount_lock);
+            thpool_p->num_threads_working++;
+            pthread_mutex_unlock(&thpool_p->thcount_lock);
+
+            /* Read job from queue and execute it */
+            void (*func_buff)(void*);
+            void* arg_buff;
+            job* job_p = jobqueue_pull(&thpool_p->jobqueue);
+            if (job_p) {
+             #ifdef DEBUG 
+                printf("线程%d开始处理\n",thread_p->id);
+             #endif
+                func_buff = job_p->function;
+                arg_buff = job_p->arg;
+                func_buff(arg_buff);
+                
+             #ifdef DEBUG 
+                printf("线程%d处理完成\n",thread_p->id);
+             #endif                
+                free(job_p);
+            }
+
+            pthread_mutex_lock(&thpool_p->thcount_lock);
+            thpool_p->num_threads_working--;
+            if (!thpool_p->num_threads_working) {
+                pthread_cond_signal(&thpool_p->threads_all_idle);
+            }
+            pthread_mutex_unlock(&thpool_p->thcount_lock);
+        }
+    }
+    pthread_mutex_lock(&thpool_p->thcount_lock);
+    thpool_p->num_threads_alive--;
+    pthread_mutex_unlock(&thpool_p->thcount_lock);
+
+    return NULL;
+}
+
+/* Frees a thread  */
+static void thread_destroy(thread* thread_p) { free(thread_p); }
+
+/* ============================ JOB QUEUE =========================== */
+
+/* Initialize queue */
+static int jobqueue_init(jobqueue* jobqueue_p) {
+    jobqueue_p->len = 0;
+    jobqueue_p->front = NULL;
+    jobqueue_p->rear = NULL;
+
+    jobqueue_p->has_jobs = (struct bsem*)malloc(sizeof(struct bsem));
+    if (jobqueue_p->has_jobs == NULL) {
+        return -1;
+    }
+
+    pthread_mutex_init(&(jobqueue_p->rwmutex), NULL);
+    bsem_init(jobqueue_p->has_jobs, 0);
+
+    return 0;
+}
+
+/* Clear the queue */
+static void jobqueue_clear(jobqueue* jobqueue_p) {
+    while (jobqueue_p->len) {
+        free(jobqueue_pull(jobqueue_p));
+    }
+
+    jobqueue_p->front = NULL;
+    jobqueue_p->rear = NULL;
+    bsem_reset(jobqueue_p->has_jobs);
+    jobqueue_p->len = 0;
+}
+
+/* Add (allocated) job to queue
+ */
+static void jobqueue_push(jobqueue* jobqueue_p, struct job* newjob) {
+    pthread_mutex_lock(&jobqueue_p->rwmutex);
+    newjob->prev = NULL;
+
+    switch (jobqueue_p->len) {
+        case 0: /* if no jobs in queue */
+            jobqueue_p->front = newjob;
+            jobqueue_p->rear = newjob;
+            break;
+
+        default: /* if jobs in queue */
+            jobqueue_p->rear->prev = newjob;
+            jobqueue_p->rear = newjob;
+    }
+    jobqueue_p->len++;
+
+    bsem_post(jobqueue_p->has_jobs);
+    pthread_mutex_unlock(&jobqueue_p->rwmutex);
+}
+
+/* Get first job from queue(removes it from queue)
+ * Notice: Caller MUST hold a mutex
+ */
+static struct job* jobqueue_pull(jobqueue* jobqueue_p) {
+    pthread_mutex_lock(&jobqueue_p->rwmutex);
+    job* job_p = jobqueue_p->front;
+
+    switch (jobqueue_p->len) {
+        case 0: /* if no jobs in queue */
+            break;
+
+        case 1: /* if one job in queue */
+            jobqueue_p->front = NULL;
+            jobqueue_p->rear = NULL;
+            jobqueue_p->len = 0;
+            break;
+
+        default: /* if >1 jobs in queue */
+            jobqueue_p->front = job_p->prev;
+            jobqueue_p->len--;
+            /* more than one job in queue -> post it */
+            bsem_post(jobqueue_p->has_jobs);
+    }
+
+    pthread_mutex_unlock(&jobqueue_p->rwmutex);
+    return job_p;
+}
+
+/* Free all queue resources back to the system */
+static void jobqueue_destroy(jobqueue* jobqueue_p) {
+    jobqueue_clear(jobqueue_p);
+    free(jobqueue_p->has_jobs);
+}
+
+/* ======================== SYNCHRONISATION ========================= */
+
+/* Init semaphore to 1 or 0 */
+static void bsem_init(bsem* bsem_p, int value) {
+    if (value < 0 || value > 1) {
+        err("bsem_init(): Binary semaphore can take only values 1 or 0");
+        exit(1);
+    }
+    pthread_mutex_init(&(bsem_p->mutex), NULL);
+    pthread_cond_init(&(bsem_p->cond), NULL);
+    bsem_p->v = value;
+}
+
+/* Reset semaphore to 0 */
+static void bsem_reset(bsem* bsem_p) {
+    pthread_mutex_destroy(&(bsem_p->mutex));
+    pthread_cond_destroy(&(bsem_p->cond));
+    bsem_init(bsem_p, 0);
+}
+
+/* Post to at least one thread */
+static void bsem_post(bsem* bsem_p) {
+    pthread_mutex_lock(&bsem_p->mutex);
+    bsem_p->v = 1;
+    pthread_cond_signal(&bsem_p->cond);
+    pthread_mutex_unlock(&bsem_p->mutex);
+}
+
+/* Post to all threads */
+static void bsem_post_all(bsem* bsem_p) {
+    pthread_mutex_lock(&bsem_p->mutex);
+    bsem_p->v = 1;
+    pthread_cond_broadcast(&bsem_p->cond);
+    pthread_mutex_unlock(&bsem_p->mutex);
+}
+
+/* Wait on semaphore until semaphore has value 0 */
+static void bsem_wait(bsem* bsem_p) {
+    pthread_mutex_lock(&bsem_p->mutex);
+    while (bsem_p->v != 1) {
+        pthread_cond_wait(&bsem_p->cond, &bsem_p->mutex);
+    }
+    bsem_p->v = 0;
+    pthread_mutex_unlock(&bsem_p->mutex);
+}
diff --git a/server-exp3/thpool.h b/server-exp3/thpool.h
new file mode 100644
index 0000000..ab25dfc
--- /dev/null
+++ b/server-exp3/thpool.h
@@ -0,0 +1,222 @@
+/**********************************
+ * @author      Johan Hanssen Seferidis
+ * License:     MIT
+ *
+ **********************************/
+
+#ifndef _THPOOL_
+#define _THPOOL_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* =================================== API ======================================= */
+
+/* ========================== STRUCTURES ============================ */
+
+/* Binary semaphore */
+typedef struct bsem {
+    pthread_mutex_t mutex;
+    pthread_cond_t cond;
+    int v;
+} bsem;
+
+/* Job */
+typedef struct job {
+    struct job* prev;            /* pointer to previous job   */
+    void (*function)(void* arg); /* function pointer          */
+    void* arg;                   /* function's argument       */
+} job;
+
+/* Job queue */
+typedef struct jobqueue {
+    pthread_mutex_t rwmutex; /* used for queue r/w access */
+    job* front;              /* pointer to front of queue */
+    job* rear;               /* pointer to rear  of queue */
+    bsem* has_jobs;          /* flag as binary semaphore  */
+    int len;                 /* number of jobs in queue   */
+} jobqueue;
+
+/* Thread */
+typedef struct thread {
+    int id;                   /* friendly id               */
+    pthread_t pthread;        /* pointer to actual thread  */
+    struct thpool_* thpool_p; /* access to thpool          */
+} thread;
+
+/* Threadpool */
+typedef struct thpool_ {
+    thread** threads;                 /* pointer to threads        */
+    volatile int num_threads_alive;   /* threads currently alive   */
+    volatile int num_threads_working; /* threads currently working */
+    pthread_mutex_t thcount_lock;     /* used for thread count etc */
+    pthread_cond_t threads_all_idle;  /* signal to thpool_wait     */
+    jobqueue jobqueue;                /* job queue                 */
+} thpool_;
+
+typedef struct thpool_* threadpool;
+
+/**
+ * @brief  Initialize threadpool
+ *
+ * Initializes a threadpool. This function will not return until all
+ * threads have initialized successfully.
+ *
+ * @example
+ *
+ *    ..
+ *    threadpool thpool;                     //First we declare a threadpool
+ *    thpool = thpool_init(4);               //then we initialize it to 4 threads
+ *    ..
+ *
+ * @param  num_threads   number of threads to be created in the threadpool
+ * @return threadpool    created threadpool on success,
+ *                       NULL on error
+ */
+threadpool thpool_init(int num_threads);
+
+/**
+ * @brief Add work to the job queue
+ *
+ * Takes an action and its argument and adds it to the threadpool's job queue.
+ * If you want to add to work a function with more than one arguments then
+ * a way to implement this is by passing a pointer to a structure.
+ *
+ * NOTICE: You have to cast both the function and argument to not get warnings.
+ *
+ * @example
+ *
+ *    void print_num(int num){
+ *       printf("%d\n", num);
+ *    }
+ *
+ *    int main() {
+ *       ..
+ *       int a = 10;
+ *       thpool_add_work(thpool, (void*)print_num, (void*)a);
+ *       ..
+ *    }
+ *
+ * @param  threadpool    threadpool to which the work will be added
+ * @param  function_p    pointer to function to add as work
+ * @param  arg_p         pointer to an argument
+ * @return 0 on success, -1 otherwise.
+ */
+int thpool_add_work(threadpool, void (*function_p)(void*), void* arg_p);
+
+/**
+ * @brief Wait for all queued jobs to finish
+ *
+ * Will wait for all jobs - both queued and currently running to finish.
+ * Once the queue is empty and all work has completed, the calling thread
+ * (probably the main program) will continue.
+ *
+ * Smart polling is used in wait. The polling is initially 0 - meaning that
+ * there is virtually no polling at all. If after 1 seconds the threads
+ * haven't finished, the polling interval starts growing exponentially
+ * until it reaches max_secs seconds. Then it jumps down to a maximum polling
+ * interval assuming that heavy processing is being used in the threadpool.
+ *
+ * @example
+ *
+ *    ..
+ *    threadpool thpool = thpool_init(4);
+ *    ..
+ *    // Add a bunch of work
+ *    ..
+ *    thpool_wait(thpool);
+ *    puts("All added work has finished");
+ *    ..
+ *
+ * @param threadpool     the threadpool to wait for
+ * @return nothing
+ */
+void thpool_wait(threadpool);
+
+/**
+ * @brief Pauses all threads immediately
+ *
+ * The threads will be paused no matter if they are idle or working.
+ * The threads return to their previous states once thpool_resume
+ * is called.
+ *
+ * While the thread is being paused, new work can be added.
+ *
+ * @example
+ *
+ *    threadpool thpool = thpool_init(4);
+ *    thpool_pause(thpool);
+ *    ..
+ *    // Add a bunch of work
+ *    ..
+ *    thpool_resume(thpool); // Let the threads start their magic
+ *
+ * @param threadpool    the threadpool where the threads should be paused
+ * @return nothing
+ */
+void thpool_pause(threadpool);
+
+/**
+ * @brief Unpauses all threads if they are paused
+ *
+ * @example
+ *    ..
+ *    thpool_pause(thpool);
+ *    sleep(10);              // Delay execution 10 seconds
+ *    thpool_resume(thpool);
+ *    ..
+ *
+ * @param threadpool     the threadpool where the threads should be unpaused
+ * @return nothing
+ */
+void thpool_resume(threadpool);
+
+/**
+ * @brief Destroy the threadpool
+ *
+ * This will wait for the currently active threads to finish and then 'kill'
+ * the whole threadpool to free up memory.
+ *
+ * @example
+ * int main() {
+ *    threadpool thpool1 = thpool_init(2);
+ *    threadpool thpool2 = thpool_init(2);
+ *    ..
+ *    thpool_destroy(thpool1);
+ *    ..
+ *    return 0;
+ * }
+ *
+ * @param threadpool     the threadpool to destroy
+ * @return nothing
+ */
+void thpool_destroy(threadpool);
+
+/**
+ * @brief Show currently working threads
+ *
+ * Working threads are the threads that are performing work (not idle).
+ *
+ * @example
+ * int main() {
+ *    threadpool thpool1 = thpool_init(2);
+ *    threadpool thpool2 = thpool_init(2);
+ *    ..
+ *    printf("Working threads: %d\n", thpool_num_threads_working(thpool1));
+ *    ..
+ *    return 0;
+ * }
+ *
+ * @param threadpool     the threadpool of interest
+ * @return integer       number of threads working
+ */
+int thpool_num_threads_working(threadpool);
+threadpool* initThreadPool(int);
+
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
diff --git a/server-exp3/togglec b/server-exp3/togglec
new file mode 100755
index 0000000..65cd6f3
Binary files /dev/null and b/server-exp3/togglec differ
diff --git a/server-exp3/togglec.c b/server-exp3/togglec.c
new file mode 100644
index 0000000..f3dceb0
--- /dev/null
+++ b/server-exp3/togglec.c
@@ -0,0 +1,30 @@
+#include "common.h"
+
+int main(int argc, char **argv) 
+{
+    int client_sock, port;
+    char *host, buf[MAXLINE];
+    rio_t rio;
+
+    if (argc != 3) {
+	    fprintf(stderr, "usage: %s <host><port>\n", argv[0]);
+	    exit(1);
+    }
+    host = argv[1];
+    port = atoi(argv[2]);
+
+    client_sock = open_client_sock(host, port);
+    if(client_sock==-1) {
+        fputs("Error to connect the Server\n",stdout);
+        exit(1);
+    }
+ 
+    while (fgets(buf, MAXLINE, stdin) != NULL) {
+            //sleep(1);
+	    send(client_sock, buf, strlen(buf),0);
+	    recv(client_sock, buf, MAXLINE,0);
+	    fputs(buf, stdout);
+    }
+    close(client_sock);
+    exit(0);
+}
diff --git a/server-exp3/togglecm b/server-exp3/togglecm
new file mode 100644
index 0000000..582f702
--- /dev/null
+++ b/server-exp3/togglecm
@@ -0,0 +1,6 @@
+for i in {1..20}
+do 
+  ./togglec localhost 12345 < $1
+  sleep 1
+done
+
diff --git a/server-exp3/togglest_pool b/server-exp3/togglest_pool
new file mode 100755
index 0000000..d794cc4
Binary files /dev/null and b/server-exp3/togglest_pool differ
diff --git a/server-exp3/togglest_pool.c b/server-exp3/togglest_pool.c
new file mode 100644
index 0000000..62d0612
--- /dev/null
+++ b/server-exp3/togglest_pool.c
@@ -0,0 +1,113 @@
+#include "common.h"
+#include "thpool.h"
+
+#define NTHREADS   4
+#define SBUFSIZE   16
+
+typedef struct _param {
+   int hit;
+   int conn_sock;
+} param;
+
+void toggle(int conn_sock,int hit);
+void handle_request( void *arg) ;
+
+void toggle(int conn_sock,int hit) 
+{
+    size_t n; int i,no=0;
+    char buf[MAXLINE]; 
+
+    
+    while((n =recv(conn_sock, buf, MAXLINE,0))> 0) {
+	printf("toggle服务器收到第%d个客户第%d个消息,长度为%d字节\n", hit,++no,(int)n);
+
+        for(i=0; i<n; i++)
+            if(isupper(buf[i])) 
+                buf[i]=tolower(buf[i]);
+            else if(islower(buf[i]))
+                buf[i]=toupper(buf[i]);
+        //sleep(1);      
+	send (conn_sock, buf, n, 0);
+    }
+    
+}
+
+//示例任务 
+void handle_request(void *arg) 
+{
+    param* datap=(param *) arg;
+    int conn_sock = datap->conn_sock;
+    int hit = datap->hit;
+
+    printf("第%d个客户通信开始\n",hit);
+    //usleep(1);
+    toggle(conn_sock,hit);
+    printf("第%d个客户通信结束\n",hit);
+    
+    free(arg);
+    close(conn_sock);
+}
+
+//主函数
+int main(int argc, char **argv) {
+
+    int listen_sock, conn_sock, port,i; 
+    struct sockaddr_in clientaddr; 
+    struct hostent *hp;
+    char *haddrp;
+    int hit;
+ 
+    int nth[NTHREADS];
+    
+    socklen_t clientlen=sizeof(struct sockaddr_in);
+
+    if (argc != 2) {
+	    fprintf(stderr, "usage: %s <port>\n", argv[0]);
+	    exit(1);
+    }
+    
+    listen_sock = open_listen_sock(port);
+    if( listen_sock==-1) {
+    	printf("端口号%d繁忙\n",port);
+    	exit(1);
+    }    
+    
+    port = atoi(argv[1]);
+    
+    listen_sock = open_listen_sock(port);
+    if( listen_sock==-1) {
+    	printf("端口号%d繁忙\n",port);
+    	exit(1);
+    }
+
+    printf("start main\n");
+    // 初始化线程池
+    thpool_* pool = thpool_init(NTHREADS);
+
+    // 创建示例任务并将其添加到线程池
+     for (hit=1; ; hit++) { 
+	    conn_sock = accept(listen_sock, (SA *) &clientaddr, &clientlen);
+	    
+           //determine the domain name and IP address of the client 
+	    hp = gethostbyaddr((const char *)&clientaddr.sin_addr.s_addr, 
+			   sizeof(clientaddr.sin_addr.s_addr), AF_INET);
+	    haddrp = inet_ntoa(clientaddr.sin_addr);
+	    //printf("server connected to %s (%s)\n", hp->h_name, haddrp);
+	               
+            param *new_param = (param*) malloc(sizeof(param));
+            
+            new_param->hit = hit;   
+            new_param->conn_sock=conn_sock;
+
+	    thpool_add_work(pool,handle_request, (void*)new_param); 
+    }
+    
+    // 等待线程池中的所有任务执行完毕
+    thpool_wait(pool);
+
+    // 销毁线程池
+    thpool_destroy(pool);
+
+    printf("stop main\n");
+    return 0;
+}
diff --git a/server-exp3/urls b/server-exp3/urls
new file mode 100644
index 0000000..7ab9998
--- /dev/null
+++ b/server-exp3/urls
@@ -0,0 +1,2 @@
+http://127.0.0.1:9999/index.html
+http://127.0.0.1:9999/test.html
diff --git a/server-exp3/webclient b/server-exp3/webclient
new file mode 100755
index 0000000..2a386ff
Binary files /dev/null and b/server-exp3/webclient differ
diff --git a/server-exp3/webclient.c b/server-exp3/webclient.c
new file mode 100644
index 0000000..9f6ef9e
--- /dev/null
+++ b/server-exp3/webclient.c
@@ -0,0 +1,55 @@
+#include <arpa/inet.h>   // 提供IP地址转换函数
+#include <netinet/in.h>  // 提供套接字地址结构定义
+#include <stdio.h>       // 标准输入输出
+#include <stdlib.h>      // 标准库函数，如exit()
+#include <string.h>      // 字符串操作函数
+#include <sys/socket.h>  // 套接字相关函数
+#include <sys/types.h>   // 数据类型定义
+#include <unistd.h>      // POSIX API，如read()和write()
+
+//#define PORT 8181                /* 目标服务器的端口号 */
+//#define IP_ADDRESS "192.168.0.8" /* 目标服务器的IP地址 */
+#define BUFSIZE 8196             /* 缓冲区大小 */
+
+char *command = "GET /index.html HTTP/1.0 \r\n\r\n"; /* HTTP GET 请求命令 */
+
+// 错误处理函数，打印错误信息并退出程序
+void pexit(char *msg) {
+    perror(msg);  // 打印错误信息
+    exit(1);      // 退出程序
+}
+
+int main(int argc, char *argv[]) {//客户端启动命令为"./client 127.0.0.1  8088",argv[1]是IP地址，argv[2]是端口号8088
+    int i, sockfd;                 // sockfd是套接字文件描述符
+    char buffer[BUFSIZE];          // 用于存储从服务器接收的数据
+    struct sockaddr_in serv_addr;  // 定义服务器地址结构
+
+    // 打印尝试连接服务器的信息
+    printf("客户端尝试连接到 %s 和端口 %s\n", argv[1], argv[2]);
+
+    // 创建套接字，使用IPv4和TCP协议
+    if ((sockfd = socket(AF_INET, SOCK_STREAM, 0)) < 0) pexit("socket() 创建失败");
+
+    // 配置服务器地址
+    serv_addr.sin_family = AF_INET;                     // 地址族为IPv4
+    serv_addr.sin_addr.s_addr = inet_addr(argv[1]);  // 设置服务器IP地址,如"127.0.0.1"
+    serv_addr.sin_port = htons(atoi(argv[2]));                   // 设置服务器端口号,如"8088"
+
+    // 尝试连接到服务器
+    if (connect(sockfd, (struct sockaddr *)&serv_addr, sizeof(serv_addr)) < 0)
+        pexit("connect() 连接失败");
+
+    // 发送HTTP GET请求到服务器
+    printf("发送字节数=%ld %s\n", strlen(command), command);
+    if (write(sockfd, command, strlen(command)) < 0) pexit("write() 发送请求失败");
+
+    // 循环读取服务器返回的数据，并输出到标准输出
+    while ((i = read(sockfd, buffer, BUFSIZE)) > 0) {
+        if (write(1, buffer, i) < 0)  // 1表示标准输出
+            pexit("write() 输出到标准输出失败");
+    }
+
+    // 关闭套接字，释放资源
+    close(sockfd);
+    return 0;  // 程序正常退出
+}
diff --git a/server-exp3/webserver b/server-exp3/webserver
new file mode 100755
index 0000000..57071ac
Binary files /dev/null and b/server-exp3/webserver differ
diff --git a/server-exp3/webserver.c b/server-exp3/webserver.c
new file mode 100644
index 0000000..63c995e
--- /dev/null
+++ b/server-exp3/webserver.c
@@ -0,0 +1,343 @@
+#include <arpa/inet.h>   // 提供网络地址转换函数
+#include <errno.h>       // 定义错误码
+#include <fcntl.h>       // 文件操作相关函数
+#include <netinet/in.h>  // 定义网络协议的结构体和函数
+#include <signal.h>      // 提供信号处理函数
+#include <stdio.h>       // 标准输入输出
+#include <stdlib.h>      // 标准库函数，如exit()
+#include <string.h>      // 字符串操作函数
+#include <sys/socket.h>  // 套接字相关函数
+#include <sys/time.h>    // 提供 gettimeofday 函数
+#include <sys/types.h>   // 定义数据类型
+#include <time.h>        // 时间相关函数
+#include <unistd.h>      // 提供POSIX API，如read()、write()
+
+#define VERSION 23     // 服务器版本号
+#define BUFSIZE 8096   // 缓冲区大小
+#define ERROR 42       // 错误日志类型
+#define LOG 44         // 普通日志类型
+#define FORBIDDEN 403  // HTTP状态码：禁止访问
+#define NOTFOUND 404   // HTTP状态码：未找到资源
+
+#ifndef SIGCLD
+#define SIGCLD SIGCHLD  // 为兼容不同系统定义信号别名
+#endif
+
+// 支持的文件扩展名及其对应的MIME类型
+struct {
+    char *ext;       // 文件扩展名
+    char *filetype;  // MIME类型
+} extensions[] = {
+    {"gif", "image/gif"},
+    {"jpg", "image/jpg"},
+    {"jpeg", "image/jpeg"},
+    {"png", "image/png"},
+    {"ico", "image/ico"},
+    {"zip", "image/zip"},
+    {"gz", "image/gz"},
+    {"tar", "image/tar"},
+    {"htm", "text/html"},
+    {"html", "text/html"},
+    {0, 0}  // 结束标志
+};
+
+/* Ctrl+C信号处理函数 */
+void ctrlc_handler(int sig)
+{
+    printf("您按下了Ctrl+C终止了Web服务器\n");
+    exit(0);
+}
+
+// 计算两个时间点之间的时间差（以毫秒为单位）
+long calculate_time_diff(struct timespec start, struct timespec end) {
+    long diff_sec = end.tv_sec - start.tv_sec;       // 秒部分差值
+    long diff_nsec = end.tv_nsec - start.tv_nsec;    // 纳秒部分差值
+    return diff_sec * 1000 + diff_nsec / 1000000.0;  // 转换为毫秒
+}
+
+void logger(int type, const char *s1, const char *s2, int socket_fd) {
+    int fd;
+    char logbuffer[BUFSIZE * 2];
+    char timebuffer[64];  // 用于存储格式化时间字符串
+
+    // 获取当前时间（秒和微秒）
+    struct timeval tv;
+    gettimeofday(&tv, NULL);
+
+    // 将秒部分格式化为字符串（年月日 时分秒）
+    struct tm *tm_info = localtime(&tv.tv_sec);
+    strftime(timebuffer, sizeof(timebuffer), "%Y-%m-%d %H:%M:%S", tm_info);
+
+    // 添加毫秒部分到时间字符串
+    char full_timebuffer[256];
+    snprintf(full_timebuffer, sizeof(full_timebuffer), "[%s.%03ld]", timebuffer, tv.tv_usec / 1000);
+
+    // 根据日志类型生成日志内容
+    switch (type) {
+        case ERROR:  // 错误日志
+            snprintf(logbuffer, sizeof(logbuffer), "%s [ERROR] %s:%s Errno=%d exiting pid=%d",
+                     full_timebuffer, s1, s2, errno, getpid());
+            break;
+        case FORBIDDEN:  // 403 禁止访问
+            if (write(socket_fd,
+                      "HTTP/1.1 403 Forbidden\nContent-Length: 185\nConnection: "
+                      "close\nContent-Type: text/html\n\n"
+                      "<html><head>\n<title>403 "
+                      "Forbidden</title>\n</head><body>\n<h1>Forbidden</h1>\n"
+                      "The requested URL, file type or operation is not allowed on this simple "
+                      "static file webserver.\n"
+                      "</body></html>\n",
+                      271) < 0) {
+                perror("Failed to send 403 Forbidden response");
+            }
+            snprintf(logbuffer, sizeof(logbuffer), "%s [FORBIDDEN] %s:%s", full_timebuffer, s1, s2);
+            break;
+        case NOTFOUND:  // 404 未找到
+            if (write(socket_fd,
+                      "HTTP/1.1 404 Not Found\nContent-Length: 136\nConnection: "
+                      "close\nContent-Type: text/html\n\n"
+                      "<html><head>\n<title>404 Not Found</title>\n</head><body>\n<h1>Not "
+                      "Found</h1>\n"
+                      "The requested URL was not found on this server.\n</body></html>\n",
+                      224) < 0) {
+                perror("Failed to send 404 Not Found response");
+            }
+            snprintf(logbuffer, sizeof(logbuffer), "%s [NOT FOUND] %s:%s", full_timebuffer, s1, s2);
+            break;
+        case LOG:  // 普通日志
+            snprintf(logbuffer, sizeof(logbuffer), "%s [INFO] %s:%s:%d", full_timebuffer, s1, s2,
+                     socket_fd);
+            break;
+    }
+
+    // 打开日志文件并写入日志内容
+    #ifdef DEBUG
+    if ((fd = open("webserver.log", O_CREAT | O_WRONLY | O_APPEND, 0644)) >= 0) {
+        if (write(fd, logbuffer, strlen(logbuffer)) < 0) {
+            perror("Failed to write log to file");
+        }
+        if (write(fd, "\n", 1) < 0) {
+            perror("Failed to write newline to log file");
+        }
+        close(fd);
+    } else {
+        perror("Failed to open log file");
+    }
+    #endif
+}
+
+// 处理HTTP请求的函数
+void web(int fd, int hit) {
+    int j, file_fd, buflen;
+    long i, ret, len;
+    char *fstr;
+    static char buffer[BUFSIZE + 1];  // 静态缓冲区，自动初始化为0
+
+    // 定义计时变量
+    struct timespec start, end;
+    long duration;
+    logger(LOG, "Process new web request", "", fd);
+
+    // 记录开始时间（读取请求）
+    clock_gettime(CLOCK_MONOTONIC, &start);
+    ret = read(fd, buffer, BUFSIZE);  // 读取客户端请求
+    if (ret <= 0) {                   // 读取失败
+        logger(FORBIDDEN, "Failed to read browser request", "", fd);
+        return;
+    }
+    buffer[ret]='\0';
+    
+    #ifdef DEBUG
+    printf("第%d个客户请求:%s\n",hit,buffer);
+    #endif 
+    
+    // 记录结束时间并计算耗时
+    clock_gettime(CLOCK_MONOTONIC, &end);
+    duration = calculate_time_diff(start, end);
+    logger(LOG, "Time taken for request reading", "", duration);
+
+    // 清除换行符和回车符
+    for (i = 0; i < ret; i++) {
+        if (buffer[i] == '\r' || buffer[i] == '\n') buffer[i] = '*';
+    }
+
+    // 记录开始时间（解析请求）
+    clock_gettime(CLOCK_MONOTONIC, &start);
+    if (strncmp(buffer, "GET ", 4)) {  // 检查是否为GET请求
+        logger(FORBIDDEN, "Only simple GET operation supported", buffer, fd);
+        return;
+    }
+    logger(LOG, "request", buffer, hit);
+
+    for (i = 4; i < BUFSIZE; i++) {  // 截取文件路径
+        if (buffer[i] == ' ') {
+            buffer[i] = 0;
+            break;
+        }
+    }
+    clock_gettime(CLOCK_MONOTONIC, &end);
+    duration = calculate_time_diff(start, end);
+    logger(LOG, "Time taken for request parsing", "", duration);
+
+    // 检查路径是否合法
+    for (j = 0; j < i - 1; j++) {
+        if (buffer[j] == '.' && buffer[j + 1] == '.') {
+            logger(FORBIDDEN, "Parent directory (..) path names not supported", buffer, fd);
+            return;
+        }
+    }
+
+    // 默认返回 index.html
+    if (!strncmp(&buffer[0], "GET /\0", 6)) strcpy(buffer, "GET /index.html");
+
+    // 文件类型解析
+    buflen = strlen(buffer);
+    fstr = 0;
+    clock_gettime(CLOCK_MONOTONIC, &start);
+    for (i = 0; extensions[i].ext != 0; i++) {
+        len = strlen(extensions[i].ext);
+        if (!strncmp(&buffer[buflen - len], extensions[i].ext, len)) {
+            fstr = extensions[i].filetype;
+            break;
+        }
+    }
+    clock_gettime(CLOCK_MONOTONIC, &end);
+    duration = calculate_time_diff(start, end);
+    logger(LOG, "Time taken for file type detection", "", duration);
+
+    if (fstr == 0) {
+        logger(FORBIDDEN, "File extension type not supported", buffer, fd);
+        return;
+    }
+
+    // 文件打开
+    clock_gettime(CLOCK_MONOTONIC, &start);
+    if ((file_fd = open(&buffer[5], O_RDONLY)) == -1) {
+        logger(NOTFOUND, "Failed to open file", &buffer[5], fd);
+        return;
+    }
+    clock_gettime(CLOCK_MONOTONIC, &end);
+    duration = calculate_time_diff(start, end);
+    logger(LOG, "Time taken for file opening", "", duration);
+
+    // 文件读取与传输
+    logger(LOG, "SEND", &buffer[5], hit);
+    clock_gettime(CLOCK_MONOTONIC, &start);
+    len = (long)lseek(file_fd, 0, SEEK_END);
+    lseek(file_fd, 0, SEEK_SET);
+    sprintf(buffer,
+            "HTTP/1.1 200 OK\nServer: nweb/%d.0\nContent-Length: %ld\nConnection: "
+            "close\nContent-Type: %s\n\n",
+            VERSION, len, fstr);
+
+    logger(LOG, "Header", buffer, hit);
+    if (write(fd, buffer, strlen(buffer)) < 0) {
+        logger(ERROR, "Failed to write HTTP header", "", fd);
+        close(file_fd);
+        return;
+    }
+
+    // 分块读取文件内容并发送
+    while ((ret = read(file_fd, buffer, BUFSIZE)) > 0) {
+        if (write(fd, buffer, ret) < 0) {
+            logger(ERROR, "Failed to write file content", "", fd);
+            break;
+        }
+    }
+    clock_gettime(CLOCK_MONOTONIC, &end);
+    duration = calculate_time_diff(start, end);
+    logger(LOG, "Time taken for file transfer", "", duration);
+
+    #ifdef DEBUG
+    printf("第%d个客户服务器完成\n",hit);
+    #endif 
+
+    // 关闭文件和套接字
+    close(file_fd);
+    close(fd);
+}
+
+// 主函数，设置服务器并监听客户端连接
+int main(int argc, char **argv) {
+    int i, port, listenfd, socketfd, hit;
+    socklen_t length;
+    static struct sockaddr_in cli_addr;   // 客户端地址
+    static struct sockaddr_in serv_addr;  // 服务器地址
+
+    // 检查命令行参数是否正确
+    if (argc < 3 || argc > 3 || !strcmp(argv[1], "-?")) {
+        (void)printf(
+            "hint: webserver Port-Number Top-Directory\t\tversion %d\n\n"
+            "\twebserver is a small and very safe mini web server\n"
+            "\twebserver only servers out file/web pages with extensions named below\n"
+            "\t and only from the named directory or its sub-directories.\n"
+            "\tThere is no fancy features = safe and secure.\n\n"
+            "\tExample: webserver 8181 /home/oslab &\n\n"
+            "\tOnly Supports:",
+            VERSION);
+        for (i = 0; extensions[i].ext != 0; i++) (void)printf(" %s", extensions[i].ext);
+
+        (void)printf(
+            "\n\tNot Supported: URLs including \"..\", Java, Javascript, CGI\n"
+            "\tNot Supported: directories / /etc /bin /lib /tmp /usr /dev /sbin \n"
+            "\tNo warranty given or implied\n\tNigel Griffiths nag@uk.ibm.com\n");
+        exit(0);
+    }
+    
+    /* 设置Ctrl+C信号处理 */
+    if(signal(SIGINT,ctrlc_handler)==SIG_ERR) 
+        (void)printf("错误: 无法设置SIGINT信号处理\n");
+
+    if (!strncmp(argv[2], "/", 2) || !strncmp(argv[2], "/etc", 5) || !strncmp(argv[2], "/bin", 5) ||
+        !strncmp(argv[2], "/lib", 5) || !strncmp(argv[2], "/tmp", 5) ||
+        !strncmp(argv[2], "/usr", 5) || !strncmp(argv[2], "/dev", 5) ||
+        !strncmp(argv[2], "/sbin", 6)) {
+        (void)printf("ERROR: Bad top directory %s, see nweb -?\n", argv[2]);
+        exit(3);
+    }
+
+    // 验证并切换到指定目录
+    if (chdir(argv[2]) == -1) {
+        perror("Failed to change directory");
+        exit(4);
+    }
+
+    port = atoi(argv[1]);
+    if (port < 1 || port > 60000) {
+        fprintf(stderr, "Invalid port number: %d\n", port);
+        exit(1);
+    }
+     // 设置服务器监听套接字
+    if ((listenfd = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
+        perror("Socket creation failed");
+        exit(1);
+    }   serv_addr.sin_family = AF_INET;
+    
+       /* Eliminates "Address already in use" error from bind. */
+    int   optval=1;
+    if (setsockopt(listenfd, SOL_SOCKET, SO_REUSEADDR, 
+		   (const void *)&optval , sizeof(int)) < 0)
+	return -1;
+
+    serv_addr.sin_addr.s_addr = htonl(INADDR_ANY);
+    serv_addr.sin_port = htons(port);
+    if (bind(listenfd, (struct sockaddr *)&serv_addr, sizeof(serv_addr)) < 0) {
+        perror("Bind failed");
+        exit(1);
+    }
+    if (listen(listenfd, 64) < 0) {
+        perror("Listen failed");
+        exit(1);
+    }
+
+    // 接受客户端连接
+    for (hit = 1;; hit++) {
+        length = sizeof(cli_addr);
+        if ((socketfd = accept(listenfd, (struct sockaddr *)&cli_addr, &length)) < 0) {
+            logger(ERROR, "system call", "accept", 0);
+        }
+        web(socketfd, hit);
+    }
+    logger(LOG, "webserver exit noramlly", "", 0);
+    return 0;
+}
diff --git a/server-exp3/webserver.log b/server-exp3/webserver.log
new file mode 100644
index 0000000..e37eebc
--- /dev/null
+++ b/server-exp3/webserver.log
@@ -0,0 +1,92 @@
+[2025-04-21 16:17:13.181] [INFO] Process new web request::4
+[2025-04-21 16:17:19.416] [FORBIDDEN] Failed to read browser request:
+[2025-04-21 16:17:22.472] [INFO] Process new web request::5
+[2025-04-21 16:17:22.475] [INFO] Time taken for request reading::2
+[2025-04-21 16:17:22.475] [INFO] request:GET /index.html HTTP/1.1**Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8**Upgrade-Insecure-Requests: 1**User-Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/60.5 Safari/605.1.15**Accept-Encoding: gzip, deflate**Accept-Language: zh-CN,zh;q=0.90**Connection: Keep-Alive**Host: 127.0.0.1:8088**Sec-Fetch-Dest: document**Sec-Fetch-Mode: navigate**Sec-Fetch-Site: none****:2
+[2025-04-21 16:17:22.475] [INFO] Time taken for request parsing::0
+[2025-04-21 16:17:22.475] [INFO] Time taken for file type detection::0
+[2025-04-21 16:17:22.475] [INFO] Time taken for file opening::0
+[2025-04-21 16:17:22.475] [INFO] SEND:index.html:2
+[2025-04-21 16:17:22.475] [INFO] Header:HTTP/1.1 200 OK
+Server: nweb/23.0
+Content-Length: 275
+Connection: close
+Content-Type: text/html
+
+:2
+[2025-04-21 16:17:22.489] [INFO] Time taken for file transfer::14
+[2025-04-21 16:17:23.071] [INFO] Process new web request::5
+[2025-04-21 16:17:23.071] [INFO] Time taken for request reading::0
+[2025-04-21 16:17:23.071] [INFO] request:GET /example.jpg HTTP/1.1**Accept: image/webp,video/*;q=0.8,image/png,image/svg+xml,image/*;q=0.8,*/*;q=0.5**Referer: http://127.0.0.1:8088/index.html**User-Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/60.5 Safari/605.1.15**Accept-Encoding: gzip, deflate**Accept-Language: zh-CN,zh;q=0.90**Connection: Keep-Alive**Host: 127.0.0.1:8088**Sec-Fetch-Dest: image**Sec-Fetch-Mode: no-cors**Sec-Fetch-Site: same-origin****:3
+[2025-04-21 16:17:23.071] [INFO] Time taken for request parsing::0
+[2025-04-21 16:17:23.071] [INFO] Time taken for file type detection::0
+[2025-04-21 16:17:23.071] [INFO] Time taken for file opening::0
+[2025-04-21 16:17:23.071] [INFO] SEND:example.jpg:3
+[2025-04-21 16:17:23.071] [INFO] Header:HTTP/1.1 200 OK
+Server: nweb/23.0
+Content-Length: 193852
+Connection: close
+Content-Type: image/jpg
+
+:3
+[2025-04-21 16:17:23.334] [INFO] Time taken for file transfer::262
+[2025-04-21 16:18:42.699] [INFO] Process new web request::5
+[2025-04-21 16:18:42.699] [INFO] Time taken for request reading::0
+[2025-04-21 16:18:42.699] [INFO] request:GET /index.html HTTP/1.0 ****���P;��aqo��գ� �!}s�
'D+�DxS��^h_q�#�n�y�~�:4
+[2025-04-21 16:18:42.699] [INFO] Time taken for request parsing::0
+[2025-04-21 16:18:42.699] [INFO] Time taken for file type detection::0
+[2025-04-21 16:18:42.699] [INFO] Time taken for file opening::0
+[2025-04-21 16:18:42.699] [INFO] SEND:index.html:4
+[2025-04-21 16:18:42.699] [INFO] Header:HTTP/1.1 200 OK
+Server: nweb/23.0
+Content-Length: 275
+Connection: close
+Content-Type: text/html
+
+:4
+[2025-04-21 16:18:42.699] [INFO] Time taken for file transfer::0
+[2026-06-16 16:27:48.793] [INFO] Process new web request::4
+[2026-06-16 16:27:48.793] [INFO] Time taken for request reading::0
+[2026-06-16 16:27:48.793] [INFO] request:GET /index.html HTTP/1.0 ****:1
+[2026-06-16 16:27:48.793] [INFO] Time taken for request parsing::0
+[2026-06-16 16:27:48.793] [INFO] Time taken for file type detection::0
+[2026-06-16 16:27:48.793] [INFO] Time taken for file opening::0
+[2026-06-16 16:27:48.794] [INFO] SEND:index.html:1
+[2026-06-16 16:27:48.794] [INFO] Header:HTTP/1.1 200 OK
+Server: nweb/23.0
+Content-Length: 275
+Connection: close
+Content-Type: text/html
+
+:1
+[2026-06-16 16:27:48.794] [INFO] Time taken for file transfer::0
+[2026-06-16 16:47:59.043] [INFO] Process new web request::4
+[2026-06-16 16:47:59.044] [INFO] Time taken for request reading::0
+[2026-06-16 16:47:59.044] [INFO] request:GET /index.html HTTP/1.0 ****:1
+[2026-06-16 16:47:59.044] [INFO] Time taken for request parsing::0
+[2026-06-16 16:47:59.044] [INFO] Time taken for file type detection::0
+[2026-06-16 16:47:59.044] [INFO] Time taken for file opening::0
+[2026-06-16 16:47:59.044] [INFO] SEND:index.html:1
+[2026-06-16 16:47:59.044] [INFO] Header:HTTP/1.1 200 OK
+Server: nweb/23.0
+Content-Length: 275
+Connection: close
+Content-Type: text/html
+
+:1
+[2026-06-16 16:47:59.045] [INFO] Time taken for file transfer::0
+[2026-06-16 17:12:17.415] [INFO] Process new web request::5
+[2026-06-16 17:12:17.415] [INFO] Time taken for request reading::0
+[2026-06-16 17:12:17.416] [INFO] request:GET /index.html HTTP/1.1**Host: 127.0.0.1:8088**User-Agent: curl/8.18.0**Accept: */*****:2
+[2026-06-16 17:12:17.416] [INFO] Time taken for request parsing::0
+[2026-06-16 17:12:17.416] [INFO] Time taken for file type detection::0
+[2026-06-16 17:12:17.416] [INFO] Time taken for file opening::0
+[2026-06-16 17:12:17.416] [INFO] SEND:index.html:2
+[2026-06-16 17:12:17.416] [INFO] Header:HTTP/1.1 200 OK
+Server: nweb/23.0
+Content-Length: 275
+Connection: close
+Content-Type: text/html
+
+:2
+[2026-06-16 17:12:17.416] [INFO] Time taken for file transfer::0
diff --git a/server-exp3/webserver_pool b/server-exp3/webserver_pool
new file mode 100755
index 0000000..cb4ee7e
Binary files /dev/null and b/server-exp3/webserver_pool differ
diff --git a/server-exp3/webserver_pool.c b/server-exp3/webserver_pool.c
new file mode 100644
index 0000000..b5bdb96
--- /dev/null
+++ b/server-exp3/webserver_pool.c
@@ -0,0 +1,374 @@
+#include <arpa/inet.h>   // 提供网络地址转换函数
+#include <errno.h>       // 定义错误码
+#include <fcntl.h>       // 文件操作相关函数
+#include <netinet/in.h>  // 定义网络协议的结构体和函数
+#include <signal.h>      // 提供信号处理函数
+#include <stdio.h>       // 标准输入输出
+#include <stdlib.h>      // 标准库函数，如exit()
+#include <string.h>      // 字符串操作函数
+#include <sys/socket.h>  // 套接字相关函数
+#include <sys/time.h>    // 提供 gettimeofday 函数
+#include <sys/types.h>   // 定义数据类型
+#include <time.h>        // 时间相关函数
+#include <unistd.h>      // 提供POSIX API，如read()、write()
+#include "thpool.h"
+
+
+#define VERSION 23     // 服务器版本号
+#define BUFSIZE 8096   // 缓冲区大小
+#define ERROR 42       // 错误日志类型
+#define LOG 44         // 普通日志类型
+#define FORBIDDEN 403  // HTTP状态码：禁止访问
+#define NOTFOUND 404   // HTTP状态码：未找到资源
+#define NTHREADS   4
+#define SBUFSIZE   16
+
+#ifndef SIGCLD
+#define SIGCLD SIGCHLD  // 为兼容不同系统定义信号别名
+#endif
+
+// 支持的文件扩展名及其对应的MIME类型
+struct {
+    char *ext;       // 文件扩展名
+    char *filetype;  // MIME类型
+} extensions[] = {
+    {"gif", "image/gif"},
+    {"jpg", "image/jpg"},
+    {"jpeg", "image/jpeg"},
+    {"png", "image/png"},
+    {"ico", "image/ico"},
+    {"zip", "image/zip"},
+    {"gz", "image/gz"},
+    {"tar", "image/tar"},
+    {"htm", "text/html"},
+    {"html", "text/html"},
+    {0, 0}  // 结束标志
+};
+
+typedef struct _param {
+   int hit;
+   int socketfd;
+} param;
+
+/* Ctrl+C信号处理函数 */
+void ctrlc_handler(int sig)
+{
+    printf("您按下了Ctrl+C终止了Web服务器\n");
+    exit(0);
+}
+
+// 计算两个时间点之间的时间差（以毫秒为单位）
+long calculate_time_diff(struct timespec start, struct timespec end) {
+    long diff_sec = end.tv_sec - start.tv_sec;       // 秒部分差值
+    long diff_nsec = end.tv_nsec - start.tv_nsec;    // 纳秒部分差值
+    return diff_sec * 1000 + diff_nsec / 1000000.0;  // 转换为毫秒
+}
+
+void logger(int type, const char *s1, const char *s2, int socket_fd) {
+    int fd;
+    char logbuffer[BUFSIZE * 2];
+    char timebuffer[64];  // 用于存储格式化时间字符串
+
+    // 获取当前时间（秒和微秒）
+    struct timeval tv;
+    gettimeofday(&tv, NULL);
+
+    // 将秒部分格式化为字符串（年月日 时分秒）
+    struct tm *tm_info = localtime(&tv.tv_sec);
+    strftime(timebuffer, sizeof(timebuffer), "%Y-%m-%d %H:%M:%S", tm_info);
+
+    // 添加毫秒部分到时间字符串
+    char full_timebuffer[256];
+    snprintf(full_timebuffer, sizeof(full_timebuffer), "[%s.%03ld]", timebuffer, tv.tv_usec / 1000);
+
+    // 根据日志类型生成日志内容
+    switch (type) {
+        case ERROR:  // 错误日志
+            snprintf(logbuffer, sizeof(logbuffer), "%s [ERROR] %s:%s Errno=%d exiting pid=%d",
+                     full_timebuffer, s1, s2, errno, getpid());
+            break;
+        case FORBIDDEN:  // 403 禁止访问
+            if (write(socket_fd,
+                      "HTTP/1.1 403 Forbidden\nContent-Length: 185\nConnection: "
+                      "close\nContent-Type: text/html\n\n"
+                      "<html><head>\n<title>403 "
+                      "Forbidden</title>\n</head><body>\n<h1>Forbidden</h1>\n"
+                      "The requested URL, file type or operation is not allowed on this simple "
+                      "static file webserver.\n"
+                      "</body></html>\n",
+                      271) < 0) {
+                perror("Failed to send 403 Forbidden response");
+            }
+            snprintf(logbuffer, sizeof(logbuffer), "%s [FORBIDDEN] %s:%s", full_timebuffer, s1, s2);
+            break;
+        case NOTFOUND:  // 404 未找到
+            if (write(socket_fd,
+                      "HTTP/1.1 404 Not Found\nContent-Length: 136\nConnection: "
+                      "close\nContent-Type: text/html\n\n"
+                      "<html><head>\n<title>404 Not Found</title>\n</head><body>\n<h1>Not "
+                      "Found</h1>\n"
+                      "The requested URL was not found on this server.\n</body></html>\n",
+                      224) < 0) {
+                perror("Failed to send 404 Not Found response");
+            }
+            snprintf(logbuffer, sizeof(logbuffer), "%s [NOT FOUND] %s:%s", full_timebuffer, s1, s2);
+            break;
+        case LOG:  // 普通日志
+            snprintf(logbuffer, sizeof(logbuffer), "%s [INFO] %s:%s:%d", full_timebuffer, s1, s2,
+                     socket_fd);
+            break;
+    }
+
+    // 打开日志文件并写入日志内容
+    #ifdef DEBUG
+    if ((fd = open("webserver.log", O_CREAT | O_WRONLY | O_APPEND, 0644)) >= 0) {
+        if (write(fd, logbuffer, strlen(logbuffer)) < 0) {
+            perror("Failed to write log to file");
+        }
+        if (write(fd, "\n", 1) < 0) {
+            perror("Failed to write newline to log file");
+        }
+        close(fd);
+    } else {
+        perror("Failed to open log file");
+    }
+    #endif
+}
+
+// 处理HTTP请求的函数
+void web(void *arg) {
+    int j, file_fd, buflen;
+    long i, ret, len;
+    char *fstr;
+    char buffer[BUFSIZE + 1];  // 改为线程局部栈缓冲区，避免多线程共享同一缓冲区造成竞争
+    param* datap=(param *) arg;
+    int fd = datap->socketfd;
+    int hit = datap->hit;
+
+    // 定义计时变量
+    struct timespec start, end;
+    long duration;
+    logger(LOG, "Process new web request", "", fd);
+
+    // 记录开始时间（读取请求）
+    clock_gettime(CLOCK_MONOTONIC, &start);
+    ret = read(fd, buffer, BUFSIZE);  // 读取客户端请求
+    if (ret <= 0) {                   // 读取失败
+        logger(FORBIDDEN, "Failed to read browser request", "", fd);
+        return;
+    }
+    buffer[ret]='\0';
+    
+    #ifdef DEBUG
+    printf("第%d个客户请求:%s\n",hit,buffer);
+    #endif 
+    
+    // 记录结束时间并计算耗时
+    clock_gettime(CLOCK_MONOTONIC, &end);
+    duration = calculate_time_diff(start, end);
+    logger(LOG, "Time taken for request reading", "", duration);
+
+    // 清除换行符和回车符
+    for (i = 0; i < ret; i++) {
+        if (buffer[i] == '\r' || buffer[i] == '\n') buffer[i] = '*';
+    }
+
+    // 记录开始时间（解析请求）
+    clock_gettime(CLOCK_MONOTONIC, &start);
+    if (strncmp(buffer, "GET ", 4)) {  // 检查是否为GET请求
+        logger(FORBIDDEN, "Only simple GET operation supported", buffer, fd);
+        return;
+    }
+    logger(LOG, "request", buffer, hit);
+
+    for (i = 4; i < BUFSIZE; i++) {  // 截取文件路径
+        if (buffer[i] == ' ') {
+            buffer[i] = 0;
+            break;
+        }
+    }
+    clock_gettime(CLOCK_MONOTONIC, &end);
+    duration = calculate_time_diff(start, end);
+    logger(LOG, "Time taken for request parsing", "", duration);
+
+    // 检查路径是否合法
+    for (j = 0; j < i - 1; j++) {
+        if (buffer[j] == '.' && buffer[j + 1] == '.') {
+            logger(FORBIDDEN, "Parent directory (..) path names not supported", buffer, fd);
+            return;
+        }
+    }
+
+    // 默认返回 index.html
+    if (!strncmp(&buffer[0], "GET /\0", 6)) strcpy(buffer, "GET /index.html");
+
+    // 文件类型解析
+    buflen = strlen(buffer);
+    fstr = 0;
+    clock_gettime(CLOCK_MONOTONIC, &start);
+    for (i = 0; extensions[i].ext != 0; i++) {
+        len = strlen(extensions[i].ext);
+        if (!strncmp(&buffer[buflen - len], extensions[i].ext, len)) {
+            fstr = extensions[i].filetype;
+            break;
+        }
+    }
+    clock_gettime(CLOCK_MONOTONIC, &end);
+    duration = calculate_time_diff(start, end);
+    logger(LOG, "Time taken for file type detection", "", duration);
+
+    if (fstr == 0) {
+        logger(FORBIDDEN, "File extension type not supported", buffer, fd);
+        return;
+    }
+
+    // 文件打开
+    clock_gettime(CLOCK_MONOTONIC, &start);
+    if ((file_fd = open(&buffer[5], O_RDONLY)) == -1) {
+        logger(NOTFOUND, "Failed to open file", &buffer[5], fd);
+        return;
+    }
+    clock_gettime(CLOCK_MONOTONIC, &end);
+    duration = calculate_time_diff(start, end);
+    logger(LOG, "Time taken for file opening", "", duration);
+
+    // 文件读取与传输
+    logger(LOG, "SEND", &buffer[5], hit);
+    clock_gettime(CLOCK_MONOTONIC, &start);
+    len = (long)lseek(file_fd, 0, SEEK_END);
+    lseek(file_fd, 0, SEEK_SET);
+    sprintf(buffer,
+            "HTTP/1.1 200 OK\nServer: nweb/%d.0\nContent-Length: %ld\nConnection: "
+            "close\nContent-Type: %s\n\n",
+            VERSION, len, fstr);
+
+    logger(LOG, "Header", buffer, hit);
+    if (write(fd, buffer, strlen(buffer)) < 0) {
+        logger(ERROR, "Failed to write HTTP header", "", fd);
+        close(file_fd);
+        return;
+    }
+
+    // 分块读取文件内容并发送
+    while ((ret = read(file_fd, buffer, BUFSIZE)) > 0) {
+        if (write(fd, buffer, ret) < 0) {
+            logger(ERROR, "Failed to write file content", "", fd);
+            break;
+        }
+    }
+    clock_gettime(CLOCK_MONOTONIC, &end);
+    duration = calculate_time_diff(start, end);
+    logger(LOG, "Time taken for file transfer", "", duration);
+
+    #ifdef DEBUG
+    printf("第%d个客户服务器完成\n",hit);
+    #endif 
+
+    // 关闭文件和套接字
+    free(arg);
+    close(file_fd);
+    close(fd);
+}
+
+
+
+
+// 主函数，设置服务器并监听客户端连接
+int main(int argc, char **argv) {
+    int i, port, listenfd, socketfd, hit;
+    socklen_t length;
+    static struct sockaddr_in cli_addr;   // 客户端地址
+    static struct sockaddr_in serv_addr;  // 服务器地址
+
+    // 检查命令行参数是否正确
+    if (argc < 3 || argc > 3 || !strcmp(argv[1], "-?")) {
+        (void)printf(
+            "hint: webserver Port-Number Top-Directory\t\tversion %d\n\n"
+            "\twebserver is a small and very safe mini web server\n"
+            "\twebserver only servers out file/web pages with extensions named below\n"
+            "\t and only from the named directory or its sub-directories.\n"
+            "\tThere is no fancy features = safe and secure.\n\n"
+            "\tExample: webserver 8181 /home/oslab &\n\n"
+            "\tOnly Supports:",
+            VERSION);
+        for (i = 0; extensions[i].ext != 0; i++) (void)printf(" %s", extensions[i].ext);
+
+        (void)printf(
+            "\n\tNot Supported: URLs including \"..\", Java, Javascript, CGI\n"
+            "\tNot Supported: directories / /etc /bin /lib /tmp /usr /dev /sbin \n"
+            "\tNo warranty given or implied\n\tNigel Griffiths nag@uk.ibm.com\n");
+        exit(0);
+    }
+    
+    /* 设置Ctrl+C信号处理 */
+    if(signal(SIGINT,ctrlc_handler)==SIG_ERR) 
+        (void)printf("错误: 无法设置SIGINT信号处理\n");
+
+    if (!strncmp(argv[2], "/", 2) || !strncmp(argv[2], "/etc", 5) || !strncmp(argv[2], "/bin", 5) ||
+        !strncmp(argv[2], "/lib", 5) || !strncmp(argv[2], "/tmp", 5) ||
+        !strncmp(argv[2], "/usr", 5) || !strncmp(argv[2], "/dev", 5) ||
+        !strncmp(argv[2], "/sbin", 6)) {
+        (void)printf("ERROR: Bad top directory %s, see nweb -?\n", argv[2]);
+        exit(3);
+    }
+
+    // 验证并切换到指定目录
+    if (chdir(argv[2]) == -1) {
+        perror("Failed to change directory");
+        exit(4);
+    }
+
+    port = atoi(argv[1]);
+    if (port < 1 || port > 60000) {
+        fprintf(stderr, "Invalid port number: %d\n", port);
+        exit(1);
+    }
+     // 设置服务器监听套接字
+    if ((listenfd = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
+        perror("Socket creation failed");
+        exit(1);
+    }   serv_addr.sin_family = AF_INET;
+    
+       /* Eliminates "Address already in use" error from bind. */
+    int   optval=1;
+    if (setsockopt(listenfd, SOL_SOCKET, SO_REUSEADDR, 
+		   (const void *)&optval , sizeof(int)) < 0)
+	return -1;
+
+    serv_addr.sin_addr.s_addr = htonl(INADDR_ANY);
+    serv_addr.sin_port = htons(port);
+    if (bind(listenfd, (struct sockaddr *)&serv_addr, sizeof(serv_addr)) < 0) {
+        perror("Bind failed");
+        exit(1);
+    }
+    if (listen(listenfd, 64) < 0) {
+        perror("Listen failed");
+        exit(1);
+    }
+
+    printf("start main\n");
+    // 初始化线程池
+    thpool_* pool = thpool_init(NTHREADS);
+
+    // 接受客户端连接
+    for (hit = 1;; hit++) {
+        length = sizeof(cli_addr);
+        if ((socketfd = accept(listenfd, (struct sockaddr *)&cli_addr, &length)) < 0) {
+            logger(ERROR, "system call", "accept", 0);
+        }
+
+        param *new_param = (param*) malloc(sizeof(param));
+        new_param->hit = hit;   
+        new_param->socketfd=socketfd;
+
+        thpool_add_work(pool,web, (void*)new_param);
+    }
+
+    // 等待线程池中的所有任务执行完毕
+    thpool_wait(pool);
+
+    // 销毁线程池
+    thpool_destroy(pool);
+    logger(LOG, "webserver exit noramlly", "", 0);
+    return 0;
+}
diff --git a/server-exp3/实验3任务报告.docx b/server-exp3/实验3任务报告.docx
new file mode 100644
index 0000000..ebc3ebd
Binary files /dev/null and b/server-exp3/实验3任务报告.docx differ
diff --git a/server-exp3/实验3文件清单.txt b/server-exp3/实验3文件清单.txt
new file mode 100644
index 0000000..b73c57a
--- /dev/null
+++ b/server-exp3/实验3文件清单.txt
@@ -0,0 +1,3 @@
+taskline.c、taskline.h: 预线程服务器任务管理程序
+pool.c、pool.h: 线程池服务器的线程管理和任务管理程序
+urls: 记录运行http_load执行时，访问哪些网址
\ No newline at end of file