证明：

略

以此文纪念我被爆破的粮仓

附录：此篇文章发表后一个月被举报了。我想问问肖战的粉丝：看看你们的所作所为，你们有什么资格举报？！

再附录：审核人员请看仔细，违规内容已经删除。

#include "csapp.h"void doit(int fd);void read_requesthdrs(rio_t *rp);int parse_uri(char *uri, char *filename, char *cgiargs);void serve_static(int fd, char *filename, int filesize);void get_filetype(char *filename, char *filetype);void serve_dynamic(int fd, char *filename, char *cgiargs);void clienterror(int fd, char *cause, char *errnum,    char *shortmsg, char *longmsg);void echo(int connfd);int main(int argc, char **argv){
     int listenfd, connfd;  char hostname[MAXLINE], port[MAXLINE];  socklen_t clientlen;  struct sockaddr_storage clientaddr;  /* Check command line args */  if (argc != 2) {
       fprintf(stderr, "usage: %s 
   
    \n", argv[0]);    exit(1);  }  listenfd = Open_listenfd(argv[1]);  while (1) {
       clientlen = sizeof(clientaddr);    connfd = Accept(listenfd, (SA *)&clientaddr, &clientlen); //line:netp:tiny:accept    Getnameinfo((SA *) &clientaddr, clientlen, hostname, MAXLINE,        port, MAXLINE, 0);    printf("Accepted connection from (%s, %s)\n", hostname, port);    echo(connfd);    Close(connfd);                                            //line:netp:tiny:close  }}void echo(int connfd) {
     size_t n;  char buf[MAXLINE];  rio_t rio;  Rio_readinitb(&rio, connfd);  while ((n = Rio_readlineb(&rio, buf, MAXLINE)) != 0) {
       if (strcmp(buf, "\r\n") == 0)      break;    Rio_writen(connfd, buf, n);  }}/* * doit - handle one HTTP request/response transaction */void doit(int fd){
     int is_static;  struct stat sbuf;  char buf[MAXLINE], method[MAXLINE], uri[MAXLINE], version[MAXLINE];  char filename[MAXLINE], cgiargs[MAXLINE];  rio_t rio;  /* Read request line and headers */  Rio_readinitb(&rio, fd);  if (!Rio_readlineb(&rio, buf, MAXLINE))  //line:netp:doit:readrequest    return;  printf("%s", buf);  sscanf(buf, "%s %s %s", method, uri, version);       //line:netp:doit:parserequest  if (strcasecmp(method, "GET")) {
                        //line:netp:doit:beginrequesterr    clienterror(fd, method, "501", "Not Implemented",        "Tiny does not implement this method");    return;  }                                                    //line:netp:doit:endrequesterr  read_requesthdrs(&rio);                              //line:netp:doit:readrequesthdrs  /* Parse URI from GET request */  is_static = parse_uri(uri, filename, cgiargs);       //line:netp:doit:staticcheck  if (stat(filename, &sbuf) < 0) {
                        //line:netp:doit:beginnotfound    clienterror(fd, filename, "404", "Not found",        "Tiny couldn't find this file");    return;  }                                                    //line:netp:doit:endnotfound  if (is_static) {
    /* Serve static content */    if (!(S_ISREG(sbuf.st_mode)) || !(S_IRUSR & sbuf.st_mode)) {
    //line:netp:doit:readable      clienterror(fd, filename, "403", "Forbidden",          "Tiny couldn't read the file");      return;    }    serve_static(fd, filename, sbuf.st_size);        //line:netp:doit:servestatic  }  else {
    /* Serve dynamic content */    if (!(S_ISREG(sbuf.st_mode)) || !(S_IXUSR & sbuf.st_mode)) {
    //line:netp:doit:executable      clienterror(fd, filename, "403", "Forbidden",          "Tiny couldn't run the CGI program");      return;    }    serve_dynamic(fd, filename, cgiargs);            //line:netp:doit:servedynamic  }}/* * read_requesthdrs - read HTTP request headers */void read_requesthdrs(rio_t *rp){
     char buf[MAXLINE];  Rio_readlineb(rp, buf, MAXLINE);  printf("%s", buf);  while(strcmp(buf, "\r\n")) {
             //line:netp:readhdrs:checkterm    Rio_readlineb(rp, buf, MAXLINE);    printf("%s", buf);  }  return;}/* * parse_uri - parse URI into filename and CGI args *             return 0 if dynamic content, 1 if static */int parse_uri(char *uri, char *filename, char *cgiargs){
     char *ptr;  if (!strstr(uri, "cgi-bin")) {
     /* Static content */ //line:netp:parseuri:isstatic    strcpy(cgiargs, "");                             //line:netp:parseuri:clearcgi    strcpy(filename, ".");                           //line:netp:parseuri:beginconvert1    strcat(filename, uri);                           //line:netp:parseuri:endconvert1    if (uri[strlen(uri)-1] == '/')                   //line:netp:parseuri:slashcheck      strcat(filename, "home.html");               //line:netp:parseuri:appenddefault    return 1;  }  else {
     /* Dynamic content */                        //line:netp:parseuri:isdynamic    ptr = index(uri, '?');                           //line:netp:parseuri:beginextract    if (ptr) {
         strcpy(cgiargs, ptr+1);      *ptr = '\0';    }    else      strcpy(cgiargs, "");                         //line:netp:parseuri:endextract    strcpy(filename, ".");                           //line:netp:parseuri:beginconvert2    strcat(filename, uri);                           //line:netp:parseuri:endconvert2    return 0;  }}/* * serve_static - copy a file back to the client */void serve_static(int fd, char *filename, int filesize){
     int srcfd;  char *srcp, filetype[MAXLINE], buf[MAXBUF];  /* Send response headers to client */  get_filetype(filename, filetype);       //line:netp:servestatic:getfiletype  sprintf(buf, "HTTP/1.0 200 OK\r\n");    //line:netp:servestatic:beginserve  sprintf(buf, "%sServer: Tiny Web Server\r\n", buf);  sprintf(buf, "%sConnection: close\r\n", buf);  sprintf(buf, "%sContent-length: %d\r\n", buf, filesize);  sprintf(buf, "%sContent-type: %s\r\n\r\n", buf, filetype);  Rio_writen(fd, buf, strlen(buf));       //line:netp:servestatic:endserve  printf("Response headers:\n");  printf("%s", buf);  /* Send response body to client */  srcfd = Open(filename, O_RDONLY, 0);    //line:netp:servestatic:open  srcp = Mmap(0, filesize, PROT_READ, MAP_PRIVATE, srcfd, 0);//line:netp:servestatic:mmap  Close(srcfd);                           //line:netp:servestatic:close  Rio_writen(fd, srcp, filesize);         //line:netp:servestatic:write  Munmap(srcp, filesize);                 //line:netp:servestatic:munmap}/* * get_filetype - derive file type from file name */void get_filetype(char *filename, char *filetype){
     if (strstr(filename, ".html"))    strcpy(filetype, "text/html");  else if (strstr(filename, ".gif"))    strcpy(filetype, "image/gif");  else if (strstr(filename, ".png"))    strcpy(filetype, "image/png");  else if (strstr(filename, ".jpg"))    strcpy(filetype, "image/jpeg");  else    strcpy(filetype, "text/plain");}/* * serve_dynamic - run a CGI program on behalf of the client */void serve_dynamic(int fd, char *filename, char *cgiargs){
     char buf[MAXLINE], *emptylist[] = {
    NULL };  /* Return first part of HTTP response */  sprintf(buf, "HTTP/1.0 200 OK\r\n");  Rio_writen(fd, buf, strlen(buf));  sprintf(buf, "Server: Tiny Web Server\r\n");  Rio_writen(fd, buf, strlen(buf));  if (Fork() == 0) {
    /* Child */ //line:netp:servedynamic:fork    /* Real server would set all CGI vars here */    setenv("QUERY_STRING", cgiargs, 1); //line:netp:servedynamic:setenv    Dup2(fd, STDOUT_FILENO);         /* Redirect stdout to client */ //line:netp:servedynamic:dup2    Execve(filename, emptylist, environ); /* Run CGI program */ //line:netp:servedynamic:execve  }  Wait(NULL); /* Parent waits for and reaps child */ //line:netp:servedynamic:wait}/* * clienterror - returns an error message to the client * id clienterror(int fd, char *cause, char *errnum,    char *shortmsg, char *longmsg){  char buf[MAXLINE], body[MAXBUF];  /* Build the HTTP response body */  sprintf(body, "
    Tiny Error");  sprintf(body, "%s\r\n", body);  sprintf(body, "%s%s: %s\r\n", body, errnum, shortmsg);  sprintf(body, "%s
    %s: %s\r\n", body, longmsg, cause);  sprintf(body, "%s
    
    The Tiny Web server\r\n", body);  /* Print the HTTP response */  sprintf(buf, "HTTP/1.0 %s %s\r\n", errnum, shortmsg);  Rio_writen(fd, buf, strlen(buf));  sprintf(buf, "Content-type: text/html\r\n");  Rio_writen(fd, buf, strlen(buf));  sprintf(buf, "Content-length: %d\r\n\r\n", (int)strlen(body));  Rio_writen(fd, buf, strlen(buf));  Rio_writen(fd, body, strlen(body));}