作为一个学校项目，我被要求构建一个简单的HTTP服务器，它可以处理和处理多个同步请求，并证明该服务器将我的主页传送到互联网浏览器。 （使用RFC 1945 / HTTP 1.0）
我参与了我的项目的一部分，所以你知道它是怎么回事 - 服务器侦听固定端口。当它收到TCP连接请求时，它通过另一个端口建立TCP连接，并在单独的线程中为请求提供服务。为简化此编程任务，我们将分两个阶段开发代码。在第一阶段，您将编写一个多线程服务器，它只显示它收到的HTTP请求消息的内容。在此程序正常运行后，您将添加生成适当响应所需的代码。
任何想法或样品？
答案 0 :(得分：1)
这是一年前我写过的带有线程池的http服务器示例：
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <assert.h>
#include <unistd.h>
#include <pthread.h>
#include <malloc.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <sys/wait.h>
#include <ctype.h>
#include <sys/mman.h>
#include <string.h>
#include <errno.h>
#include <dirent.h>
#include <signal.h>
#define KB 1024
/*function declerations*/
void send_content(int fd, int connfd,int isDir,char* path);
void enqueue(int data);
void* dequeue(void* ptr);
void send_to_client(int connfd, char* line);
/*global vars*/
pthread_mutex_t lock;
pthread_cond_t emp;
int sock =0;
int max_threads =0;
int global_count=0;
int finished =1;
int length=0;
/*Queue*/
struct node{
int info;
struct node *ptr;
}*head,*tail;
struct sigaction ready, last;
int main(int argc, char** argv){
int threads;
int requests;
int port;
int i;
int s;
int len_of_packet=1;
int fd;
int port1;
int file;
char content[16000];
char *fileContent ;
int thrd ;
int rc;
char method[KB];
char path[KB];
int s_len=0;
int r_len=0;
int fileLen;
int parsing;
unsigned int addr_size;
struct sockaddr_in serv_addr, client_addr;
struct stat st;
struct dirent *entry;
DIR *dir;
static fd_set readsocks, socks;
char buf[KB] ;
char Uniform_Resource_Identifier[KB];
int servfd;
int socket_of_accept;
off_t chunk=0;
size_t readData;
int sent;
assert (argc ==3 || argc ==4);
threads = strtol(argv[1], NULL, 10);
if ((errno == ERANGE && (threads == LONG_MAX || threads == LONG_MIN))
|| (errno != 0 && threads == 0)) {
perror("Error: strtol has been failed\n");
exit(0);
}
max_threads = threads;
requests = strtol(argv[2], NULL, 10);
if ((errno == ERANGE && (requests == LONG_MAX || requests == LONG_MIN))
|| (errno != 0 && requests == 0)) {
perror("Error: strtol has been failed\n");
exit(0);
}
port = 80;
if (argc == 4){
port = strtol(argv[3], NULL, 10);
if ((errno == ERANGE && (port == LONG_MAX || port == LONG_MIN))
|| (errno != 0 && port == 0)) {
perror("Error: strtol has been failed\n");
exit(0);
}
}
pthread_t threadsArr[threads];
if(pthread_mutex_init(&lock,NULL)!=0){
printf("Error: failed to init mutex\n");
return 1;
}
pthread_cond_init( &emp, NULL);
head=NULL;
tail=NULL;
/*create threads*/
for (thrd=0; thrd<threads;thrd++){
rc = pthread_create(&threadsArr[thrd], NULL, dequeue, (void*) &thrd);
if (rc){
printf("Error: failed to create thread\n");
return 1;
}
}
/* create socket */
servfd = socket(AF_INET, SOCK_STREAM, 0);
sock = servfd;
if (servfd == -1) {
printf("Error creating socket\n");
exit(1);
}
/* init prepernces */
memset(&serv_addr, '0', sizeof(serv_addr));
serv_addr.sin_family = AF_INET;
serv_addr.sin_addr.s_addr = htonl(INADDR_ANY);
serv_addr.sin_port = htons(port);
/* bind */
setsockopt(servfd, SOL_SOCKET, SO_REUSEADDR, (const char *) &len_of_packet,sizeof(int));
if (bind(servfd, (struct sockaddr*) &serv_addr, sizeof(serv_addr)) == -1) {
printf("Error: Bind has been failed\n");
perror ("Bind: ");
exit(1);
}
/*listen */
if (listen(servfd, requests) == -1) {
printf("Error: Listen has been failed\n");
perror ("Listen: ");
exit(1);
}
FD_ZERO(&socks);
FD_SET(servfd, &socks);
int startLen = strlen("HTTP/1.0 200 OK\r\n"
"Content-Type: text/html; charset=UTF-8\r\n\r\n"
"<doctype !html><html><head><title></title>"
"<style>body"
"h1 { font-size:4cm; text-align: center; color: black;"
"}</style></head>"
"<body><h1>Service Unavailable (HTTP 503)</h1></body></html>\r\n");
int endLen = strlen("</h1></body></html>\r\n");
while(1){
sigfillset(&ready.sa_mask);
ready.sa_handler = SIG_IGN;
ready.sa_flags = 0;
if (sigaction(SIGINT, &ready,&last) || sigaction(SIGINT,&last,NULL)){
finished=0;
for(i=0; i<threads; i++){
rc = pthread_join(threadsArr[i], NULL);
if(rc != 0){
printf("Error: join has been failed\n");
perror("Join: ");
return 1;
}
}
pthread_mutex_destroy(&lock);
close(sock);
}
addr_size = sizeof(client_addr);
socket_of_accept = accept(servfd, (struct sockaddr *) &client_addr, &addr_size);
if (socket_of_accept == -1) {
printf("Error: Accept has been failed\n");
perror ("Accept: ");
exit(1);
}
enqueue(socket_of_accept);
if (length <= requests){
/*recieve message*/
r_len = recv(socket_of_accept, buf, KB,0);
if (r_len == -1){
printf("Error: recieve has been %d\n", socket_of_accept);
close(socket_of_accept);
exit(1);
}
sscanf(buf,"%s %s", method, Uniform_Resource_Identifier);
sscanf(Uniform_Resource_Identifier,"%s", path);
printf("method = %s, path = %s\n", method, path);
/*GET OR POST*/
if(strcmp(method, "GET")!= 0 && strcmp(method, "POST") != 0){
char response[] = "HTTP/1.0 200 OK\r\n"
"Content-Type: text/html; charset=UTF-8\r\n\r\n"
"<doctype !html><html><head><title></title>"
"<style>body"
"h1 { font-size:4cm; text-align: center; color: black;"
"}</style></head>"
"<body><h1>Service Unavailable (HTTP 503)</h1></body></html>\r\n";
s_len = send(socket_of_accept, response, strlen(response), 0);
if (s_len == -1){
printf("Error: failed to send message %s to client %d\n", response, socket_of_accept);
close(socket_of_accept);
exit(1);
}
}
if (stat(path, &st) == -1){ /*file not found*/
char response[] = "HTTP/1.0 200 OK\r\n"
"Content-Type: text/html; charset=UTF-8\r\n\r\n"
"<doctype !html><html><head><title></title>"
"<style>body"
"h1 { font-size:4cm; text-align: center; color: black;"
"}</style></head>"
"<body><h1>Not Found (HTTP 404)</h1></body></html>\r\n";
s_len = send(socket_of_accept, response, strlen(response), 0);
if (s_len == -1){
printf("Error: failed to send message %s to client %d\n", response, socket_of_accept);
close(socket_of_accept);
exit(1);
}
close(socket_of_accept);
}else {
if(S_ISDIR(st.st_mode)){/*directory*/
if((dir = opendir (path)) != NULL){
send_content(fd, socket_of_accept,1,path);
close(socket_of_accept);
}else{
printf("Error: failed to open directory: %s\n", path);
}
}else if(S_ISREG(st.st_mode) && st.st_size != 0){/*regular file*/
fd=open(path,O_RDONLY);
send_content(fd, socket_of_accept,0,path);
close(file);
close(socket_of_accept);
}
else{/*empty file*/
char response[] = "HTTP/1.0 200 OK\r\n"
"Content-Type: text/html; charset=UTF-8\r\n\r\n"
"<doctype !html><html><head><title></title>"
"<style>body"
"h1 { font-size:4cm; text-align: center; color: black;"
"}</style></head>"
"<body><h1> </h1></body></html>\r\n";
s_len = send(socket_of_accept, response, strlen(response), 0);
if (s_len == -1){
printf("Error: failed to send message %s to client %d\n", response, socket_of_accept);
close(socket_of_accept);
exit(1);
}
}
}
}else{/*full queue*/
/*send (HTTP 503)*/
char response[3000] = "HTTP/1.0 200 OK\r\n"
"Content-Type: text/html; charset=UTF-8\r\n\r\n"
"<doctype !html><html><head><title></title>"
"<style>body"
"h1 { font-size:4cm; text-align: center; color: black;"
"}</style></head>"
"<body><h1>Service Unavailable (HTTP 503)</h1></body></html>\r\n";
s_len = send(socket_of_accept, response, strlen(response), 0);
if (s_len == -1){
printf("Error: unable to send a message %s to: %d\n", response, socket_of_accept);
close(socket_of_accept);
exit(1);
}
close(socket_of_accept);
}
}
return 0;
}
void send_content(int fd, int connfd,int isDir,char* path){
char line[KB];
memset(line, 0, sizeof(line));
send_to_client(connfd, "HTTP/1.0 200 OK\r\n\r\n");
int return_value;
if(!isDir){
while ((return_value=read(fd, line, KB)) > 0) {
send_to_client(connfd, line);
memset(line, 0, sizeof(line));
}
if (return_value < 0){
perror("Error read");
send_to_client(connfd, "Error Resorces\n");
return;
}
}
else {
DIR *d;
struct dirent *dir;
d = opendir(path);
if (d)
{
while ((dir = readdir(d)) != NULL)
{
strcpy(line,dir->d_name);
strcat(line,"\n");
send_to_client(connfd,line);
memset(line, 0, sizeof(line));
}
closedir(d);
}
}
}
/*enqueue*/
void enqueue(int data)
{
int rc;
struct node* temp;
temp = (struct node *)malloc(1*sizeof(struct node));
if(temp == NULL){
printf("Error: couldn't allocate memory\n");
exit(1);
}
temp->ptr = NULL;
temp->info = data;
if (pthread_mutex_lock(&lock) !=0){
printf("Error: failed to lock\n");
exit(1);
}
if (length == 0) /*empty queue*/
{
head = temp;
}else
{
tail->ptr = temp;
}
tail = temp;
length++;
rc = pthread_cond_broadcast(&emp);
assert(rc==0);
if (pthread_mutex_unlock(&lock)!=0){
printf("Error: failed to unlock\n");
pthread_exit(0);
}
return;
}
void send_to_client(int connfd, char* line){
int nsent, totalsent;
int notwritten = strlen(line);
/* keep looping until nothing left to write*/
totalsent = 0;
while (notwritten > 0){
/* notwritten = how much we have left to write
totalsent = how much we've written so far
nsent = how much we've written in last write() call */
nsent = write(connfd, line + totalsent, notwritten);
assert(nsent>=0); // check if error occured (client closed connection?)
totalsent += nsent;
notwritten -= nsent;
}
}
/*dequeue*/
void* dequeue(void* ptr)
{
int rc;
int i=0;
int thread = *((int*)ptr);
struct node* temp;
while(finished){
if (pthread_mutex_lock(&lock) !=0){
printf("Error: lock has been failed\n");
pthread_exit(0);
}
while (length == 0)
{
rc = pthread_cond_wait(&emp, &lock);
assert(rc == 0);
}
int info = head->info;
temp = head;
head = head->ptr;
free(temp);
length--;
rc = pthread_cond_broadcast(&emp);
assert(rc==0);
if (pthread_mutex_unlock(&lock)!=0){
printf("Error: unlock has been failed\n");
pthread_exit(0);
}
}
pthread_exit(0);
}