cgistub.cpp

来自「一个功能强大的内存数据库源代码,c++编写,有详细的注释」· C++ 代码 · 共 100 行

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//-< CGISTUB.CXX >---------------------------------------------------*--------*// FastDB                    Version 1.0         (c) 1999  GARRET    *     ?  *// (Main Memory Database Management System)                          *   /\|  *//                                                                   *  /  \  *//                          Created:     27-Mar-99    K.A. Knizhnik  * / [] \ *//                          Last update: 30-Jul-99    K.A. Knizhnik  * GARRET *//-------------------------------------------------------------------*--------*// Stub for CGI scripts //-------------------------------------------------------------------*--------*#include "stdtp.h"#include "sockio.h"void message(char const* msg){    printf("Content-type: text/html\r\n\r\n"	   "<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 3.2//EN\">"	   "<HTML><HEAD><TITLE>CGI STUB message</TITLE></HEAD><BODY>"	   "<H1><FONT COLOR=\"#FF0000\">%s</FONT></H1></BODY></HTML>", msg);    exit(0);}int main() {     char*  request = getenv("QUERY_STRING");    char*  buf;    size_t length;    size_t buf_size;    char* host = getenv("HTTP_HOST");    char* script = getenv("SCRIPT_NAME");    char* peer = getenv("REMOTE_ADDR");    assert(host != NULL);    assert(script != NULL);    if (request == NULL || *request == '\0') { 	char* length_str = getenv("CONTENT_LENGTH");	if (length_str == NULL || sscanf(length_str, "%d", &length) != 1) { 	    message("Failed to receive data using POST method");	}	buf_size = length + 14 + 6 + strlen(host) + strlen(script) + strlen(peer);	buf = new char[buf_size+1];	if (fread(buf, 1, length, stdin) != length) { 	    message("Failed to read data using POST method");	}    } else {	length = strlen(request);	buf_size = length + 14 + 6 + strlen(host) + strlen(script) + strlen(peer);	buf = new char[buf_size+1];	memcpy(buf, request, length);    }    if (length <= 7 || strncmp(buf, "socket=", 7) != 0) {	message("No socket field specified");    }    sprintf(buf+length, "&stub=http://%s%s&peer=%s&", host, script, peer);    char* addr = buf + 7;    char *src = addr, *dst = addr;    while (*src != '&') { 	if (*src == '+') {	    *dst++ = ' ';	    src += 1;	} else if (*src == '%') { 	    *dst++ = ((src[1] >= 'A' ? src[1] - 'A'+ 10 : src[1] - '0') << 4) |		     (src[2] >= 'A' ? src[2] - 'A'+ 10 : src[2] - '0');	    src += 3;	} else { 	    *dst++ = *src++;	}    }    *dst = '\0';    socket_t* s = socket_t::connect(addr);    if (s == NULL) { 	message("Failed to connect to application");    }    *(int*)buf = buf_size;    buf[4] = src - buf - 3;    if (!s->write(buf, buf_size)) { 	message("Failed to send query to application");    }    if (s->read(buf, 4, 4) != 4) { 	message("Failed to read reply length");    }    nat4 reply_length = *(int4*)buf;    if (reply_length > buf_size) { 	delete[] buf;	buf = new char[reply_length];    }     int size = reply_length - sizeof(reply_length);    if (s->read(buf, size, size) != size) { 	message("Failed to read reply");    }    fwrite(buf, 1, reply_length - sizeof(reply_length), stdout);    delete[] buf;    s->close();    return 0;}

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