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/* $Id: parse.cpp 1649 2009-10-19 14:35:01Z terpstra $
*
* parse.cpp - Deal with CGI ugliness
*
* Copyright (C) 2002 - Wesley W. Terpstra
*
* License: GPL
*
* Authors: 'Wesley W. Terpstra' <wesley@terpstra.ca>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#define _FILE_OFFSET_BITS 64
#include <iostream>
#include <cstdlib>
#include "parse.h"
inline int fromHex(char c)
{
if (c >= 'A' && c <= 'Z') return c - 'A' + 10;
if (c >= 'a' && c <= 'z') return c - 'a' + 10;
if (c >= '0' && c <= '9') return c - '0';
return -1;
}
string decipherHalf(const string& str)
{
// cout << "deciper: " << str << endl;
string out;
int high, low;
string::size_type b = 0, e;
while ((e = str.find_first_of("%+", b)) != string::npos)
{
out.append(str, b, e - b);
if (str[e] == '+') out.append(" ");
else if (str.length() > e+2 &&
(high = fromHex(str[e+1])) != -1 &&
(low = fromHex(str[e+2])) != -1)
{
int ch = high << 4 | low;
out += ((char)ch);
e += 2;
}
else
{ // keep the broken escape char
out.append("%");
}
b = e+1;
}
out.append(str, b, string::npos);
return out;
}
pair<string, string> splitParam(const string& str)
{
// cout << "split: " << str << endl;
string::size_type split = str.find('=');
if (split == string::npos)
return pair<string, string>(decipherHalf(str), "");
else return pair<string, string>(
decipherHalf(str.substr(0, split)),
decipherHalf(str.substr(split+1, string::npos)));
}
map<string, string> getParams()
{
map<string, string> out;
const char* x = getenv("QUERY_STRING");
string str = x?x:"";
// cout << "parse: " << str << endl;
string::size_type b = str.find_first_not_of('&', 0), e;
if (b == string::npos) return out;
while ((e = str.find_first_of('&', b)) != string::npos)
{
out.insert(splitParam(str.substr(b, e - b)));
b = str.find_first_not_of('&', e+1);
if (b == string::npos) break;
}
if (b != string::npos)
out.insert(splitParam(str.substr(b, str.length() - b)));
return out;
}
map<string, string> getCookies()
{
map<string, string> out;
const char* x = getenv("HTTP_COOKIE");
string str = x?x:"";
// cout << "parse: " << str << endl;
string::size_type b = str.find_first_not_of("; ", 0), e;
if (b == string::npos) return out;
while ((e = str.find_first_of("; ", b)) != string::npos)
{
out.insert(splitParam(str.substr(b, e - b)));
b = str.find_first_not_of("; ", e+1);
if (b == string::npos) break;
}
if (b != string::npos)
out.insert(splitParam(str.substr(b, str.length() - b)));
return out;
}
string uriEncode(const string& str)
{
string out;
static const char tbl[17] = "0123456789ABCDEF";
string::size_type b = 0, e;
while ((e = str.find_first_not_of(
"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789~:/.,@-!",
b)) != string::npos)
{
out.append(str, b, e - b);
out += '%';
out += tbl[(str[e] >> 4) & 0xF];
out += tbl[(str[e] >> 0) & 0xF];
b = e+1;
}
out.append(str, b, str.length() - b);
return out;
}
int redirectUrl(const string& url)
{
string proto(url, 0, 11);
for (string::size_type i = 0; i < proto.length(); ++i)
if (proto[i] >= 'A' && proto[i] <= 'Z')
proto[i] += 'a' - 'A';
if (proto == "javascript:")
{
cout << "Status: 200 OK\r\n"
<< "Content-type: text/plain\r\n\r\n"
<< "Javascript go awaaayyyyyaaayyy! GO AWAY!\n";
}
else
{
cout << "Status: 303 Moved Permanently\r\n"
<< "Location: " << uriEncode(url) << "\r\n"
<< "Content-type: text/html\r\n\r\n"
<< "<!DOCTYPE HTML PUBLIC \"-//IETF//DTD HTML 2.0//EN\">\r\n"
<< "<html><head>\r\n"
<< "<title>301 Moved Permanently</title>\r\n"
<< "</head><body>\r\n"
<< "<h1>Moved Permanently</h1>\r\n"
<< "The document has moved <a href=\"" << uriEncode(url) << "\">here</a>.\r\n"
<< "<p><hr>\r\n"
<< "</body></html>\r\n";
}
return 0;
}
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