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#include <stdarg.h>#include <errno.h>#include <stdio.h>#include <fcntl.h>#include <unistd.h>#include <string.h>#include <time.h>#include <sys/types.h>#include <sys/stat.h>#include <dirent.h>#include <errno.h>#include <netinet/in.h>#include <sys/socket.h>#include <resolv.h>#include <arpa/inet.h>#include <stdlib.h>#include <signal.h>#include <getopt.h>#define DEFAULTIP "127.0.0.1"#define DEFAULTPORT "80"#define DEFAULTBACK "10"#define DEFAULTDIR "/home"#define DEFAULTLOG "/tmp/das-server.log"void prterrmsg(char *msg);#define prterrmsg(msg) { perror(msg); abort(); }void wrterrmsg(char *msg);#define wrterrmsg(msg) { fputs(msg, logfp); fputs(strerror(errno), logfp);fflush(logfp); abort(); }void prtinfomsg(char *msg);#define prtinfomsg(msg) { fputs(msg, stdout); }void wrtinfomsg(char *msg);#define wrtinfomsg(msg) { fputs(msg, logfp); fflush(logfp);}#define MAXBUF 1024char buffer[MAXBUF + 1];char *host = 0;char *port = 0;char *back = 0;char *dirroot = 0;char *logdir = 0;unsigned char daemon_y_n = 0;FILE *logfp;#define MAXPATH 150/*----------------------------------------*--- dir_up - 查找dirpath所指目录的上一级目录*----------------------------------------*/char *dir_up(char *dirpath){ static char Path[MAXPATH]; int len; strcpy(Path, dirpath); len = strlen(Path); if (len > 1 && Path[len - 1] == '/') len--; while (Path[len - 1] != '/' && len > 1) len--; Path[len] = 0; return Path;}/*------------------------------------------------------*--- AllocateMemory - 分配空间并把d所指的内容复制*------------------------------------------------------*/void AllocateMemory(char **s, int l, char *d){ *s = malloc(l + 1); bzero(*s, l + 1); memcpy(*s, d, l);}/************关于本文档*********************************************filename: das-server.c*purpose: 这是在Linux下用C语言写的目录访问服务器，支持目录浏览和文件下载*wrote by: zhoulifa(zhoulifa@163.com) 周立发(http://zhoulifa.bokee.com)Linux爱好者 Linux知识传播者 SOHO族 开发者 最擅长C语言*date time:2007-01-26 19:32*Note: 任何人可以任意复制代码并运用这些文档，当然包括你的商业用途* 但请遵循GPL*Thanks to: Google.com*Hope:希望越来越多的人贡献自己的力量，为科学技术发展出力* 科技站在巨人的肩膀上进步更快！感谢有开源前辈的贡献！*********************************************************************//*------------------------------------------------------*--- GiveResponse - 把Path所指的内容发送到client_sock去*-------------------如果Path是一个目录，则列出目录内容*-------------------如果Path是一个文件，则下载文件*------------------------------------------------------*/void GiveResponse(FILE * client_sock, char *Path){ struct dirent *dirent; struct stat info; char Filename[MAXPATH]; DIR *dir; int fd, len, ret; char *p, *realPath, *realFilename, *nport; /* 获得实际工作目录或文件 */ len = strlen(dirroot) + strlen(Path) + 1; realPath = malloc(len + 1); bzero(realPath, len + 1); sprintf(realPath, "%s/%s", dirroot, Path); /* 获得实际工作端口 */ len = strlen(port) + 1; nport = malloc(len + 1); bzero(nport, len + 1); sprintf(nport, ":%s", port); /* 获得实际工作目录或文件的信息以判断是文件还是目录 */ if (stat(realPath, &info)) { fprintf(client_sock, "HTTP/1.1 200 OK\r\nServer: DAS by ZhouLifa\r\nConnection: close\r\n\r\n<html><head><title>%d - %s</title></head>" "<body><font size=+4>Linux 下目录访问服务器</font><br><hr width=\"100%%\"><br><center>" "<table border cols=3 width=\"100%%\">", errno, strerror(errno)); fprintf(client_sock, "</table><font color=\"CC0000\" size=+2>请向管理员咨询为何出现如下错误提示：\n%s %s</font></body></html>", Path, strerror(errno)); goto out; } /* 处理浏览文件请求，即下载文件 */ if (S_ISREG(info.st_mode)) { fd = open(realPath, O_RDONLY); len = lseek(fd, 0, SEEK_END); p = (char *) malloc(len + 1); bzero(p, len + 1); lseek(fd, 0, SEEK_SET); ret = read(fd, p, len); close(fd); fprintf(client_sock, "HTTP/1.1 200 OK\r\nServer: DAS by ZhouLifa\r\nConnection: keep-alive\r\nContent-type: application/*\r\nContent-Length:%d\r\n\r\n", len); fwrite(p, len, 1, client_sock); free(p); } else if (S_ISDIR(info.st_mode)) { /* 处理浏览目录请求 */ dir = opendir(realPath); fprintf(client_sock, "HTTP/1.1 200 OK\r\nServer: DAS by ZhouLifa\r\nConnection: close\r\n\r\n<html><head><title>%s</title></head>" "<body><font size=+4>Linux 下目录访问服务器</font><br><hr width=\"100%%\"><br><center>" "<table border cols=3 width=\"100%%\">", Path); fprintf(client_sock, "<caption><font size=+3>目录 %s</font></caption>\n", Path); fprintf(client_sock, "<tr><td>名称</td><td>大小</td><td>修改时间</td></tr>\n"); if (dir == 0) { fprintf(client_sock, "</table><font color=\"CC0000\" size=+2>%s</font></body></html>", strerror(errno)); return; } /* 读取目录里的所有内容 */ while ((dirent = readdir(dir)) != 0) { if (strcmp(Path, "/") == 0) sprintf(Filename, "/%s", dirent->d_name); else sprintf(Filename, "%s/%s", Path, dirent->d_name); fprintf(client_sock, "<tr>"); len = strlen(dirroot) + strlen(Filename) + 1; realFilename = malloc(len + 1); bzero(realFilename, len + 1); sprintf(realFilename, "%s/%s", dirroot, Filename); if (stat(realFilename, &info) == 0) { if (strcmp(dirent->d_name, "..") == 0) fprintf(client_sock, "<td><a href=\"http://%s%s%s\">(parent)</a></td>", host, atoi(port) == 80 ? "" : nport, dir_up(Path)); else fprintf(client_sock, "<td><a href=\"http://%s%s%s\">%s</a></td>", host, atoi(port) == 80 ? "" : nport, Filename, dirent->d_name); if (S_ISDIR(info.st_mode)) fprintf(client_sock, "<td>目录</td>"); else if (S_ISREG(info.st_mode)) fprintf(client_sock, "<td>%d</td>", info.st_size); else if (S_ISLNK(info.st_mode)) fprintf(client_sock, "<td>链接</td>"); else if (S_ISCHR(info.st_mode)) fprintf(client_sock, "<td>字符设备</td>"); else if (S_ISBLK(info.st_mode)) fprintf(client_sock, "<td>块设备</td>"); else if (S_ISFIFO(info.st_mode)) fprintf(client_sock, "<td>FIFO</td>"); else if (S_ISSOCK(info.st_mode)) fprintf(client_sock, "<td>Socket</td>"); else fprintf(client_sock, "<td>(未知)</td>"); fprintf(client_sock, "<td>%s</td>", ctime(&info.st_ctime)); } fprintf(client_sock, "</tr>\n"); free(realFilename); } fprintf(client_sock, "</table></center></body></html>"); } else { /* 既非常规文件又非目录，禁止访问 */ fprintf(client_sock, "HTTP/1.1 200 OK\r\nServer: DAS by ZhouLifa\r\nConnection: close\r\n\r\n<html><head><title>permission denied</title></head>" "<body><font size=+4>Linux 下目录访问服务器</font><br><hr width=\"100%%\"><br><center>" "<table border cols=3 width=\"100%%\">"); fprintf(client_sock, "</table><font color=\"CC0000\" size=+2>你访问的资源'%s'被禁止访问，请联系管理员解决！</font></body>< /html>", Path); } out: free(realPath); free(nport);}/*------------------------------------------------------*--- getoption - 分析取出程序的参数*------------------------------------------------------*/void getoption(int argc, char **argv){ int c, len;⌨️ 快捷键说明
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