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Skunk.cpp
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Skunk.cpp
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#include "Skunk.hpp"
#include <cstdio>
#include <cstring>
#include <iostream>
/**
* @file Skunk.cpp
*
* */
/**
* Przekazuje znak zapisany heksadecymalnie do typu char
* @param a - podawany na wejscie string z heksadecymalnym znakiem
*
* */
char CharFromHex (std::string a)
{
std::istringstream Blat (a);
int Z;
Blat >> std::hex >> Z;
return char(Z); // cast to char and return
}
/**
* Odczytuje strumien z pola tekstowego formularza widocznego w przegladarce
* i konwertuje go na typ string
*
* @param coded - parametr typu string odczytywany z pola tekstowego
* @return Text - zwraca przekonwertowany string
* */
std::string urldecoder(std::string coded){
std::string Text = coded;
std::string::size_type Pos;
std::string Hex;
while (std::string::npos != (Pos = Text.find('%')))
{
Hex = Text.substr(Pos + 1, 2);
Text.replace(Pos, 3, 1, CharFromHex(Hex));}
while (std::string::npos != (Pos = Text.find('+')))
{
Text.replace(Pos, 1, 1, ' ');}
return Text;
}
typedef std::map<std::string, std::string> StringMap;
/**
* Dodaje nowy widget do serwera
* @param w - nowy widget
* @return zwraca wskaznik na puste miejsce w liscie widgetow
* */
int Skunk::Server::addWidget(Skunk::Widget *w) {
widgets_.push_back(w);
w->id_ = nextID_;
std::string id = "id" + itoa(nextID_);
widgets_map_[id] = w;
return nextID_++;
}
/**
* Realizuje metode HTTP GET przy wiswietlaniu wszystkich dostepnych widgetow
* @param env - parametry zapytania HTTP
* @return zwraca odpowiedz serwera
*
* */
CSGI::Response Skunk::Server::get(CSGI::Env& env, std::string& username) {
CSGI::Response resp;
int count;
std::stringstream id_str;
resp.status = 200;
std::vector<Skunk::Widget *>::iterator it;
resp.content.append("<html>\n");
resp.content.append("\t<head><title>2012 TIN SERVER</title></head>\n");
resp.content.append("<script type='text/javascript' src='http://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js'></script>");
resp.content.append("\t<body>");
resp.content.append("\n\t\t<form method='post' action='/'>\n");
for (it = widgets_.begin(); it != widgets_.end(); it++) {
Skunk::Widget *w = *it;
if (auth_->canGET(username, w->id_)) {
resp.content.append(w->GET());
resp.content.append("<hr/>");
}
}
count = widgets_.size();
id_str << count;
resp.content.append("<input type='hidden' name='count' id='wid_count' value='");
resp.content.append(id_str.str());
resp.content.append("'/>");
resp.content.append("\n\t\t\t<input type='submit' value='Zmien'/>");
resp.content.append("\n\t\t</form>");
if(username == "admin"){
resp.content.append("\n\n\n<a href='/adduser' id='useradd' >Add new user</a>");
}
resp.content.append("<form method='post' action='/logout'>");
resp.content.append("<input type='submit' value='Logout'/>");
resp.content.append("</form>\n");
resp.content.append("<script type='text/javascript'>\n");
resp.content.append("jQuery(document).bind('ready',function(){\n");
resp.content.append("var count = $('#wid_count').attr('value');\n");
resp.content.append("var i;\n");
resp.content.append("var change_id;\n");
resp.content.append("var radio_count = $('#radio_count').attr('value');\n");
resp.content.append("for (i=0;i<count;++i){\n");
resp.content.append("$('#i'+i).change(function(){\n");
resp.content.append("change_id = $(this).attr('id');\n");
resp.content.append("$('#'+change_id+'_changed').val('true');\n");
resp.content.append("});\n");
resp.content.append("for (j=0;j<=radio_count;++j){\n"); ///wewnetrzny for dla radio radio_count
resp.content.append("$('#i'+i+'_'+j).click(function(){\n");
resp.content.append("alert('zmieniam');");
resp.content.append("change_id = $(this).attr('id');\n");
resp.content.append("alert(change_id);");
resp.content.append("$('#'+change_id+'_changed').val('true');\n");
resp.content.append("});\n");
resp.content.append("}\n");
resp.content.append("}\n");
///(value).attr('src'));
resp.content.append("});\n");
resp.content.append("</script>\n");
resp.content.append("\n\t</body>\n</html>\n");
resp.headers["Content-Type"] = "text/html";
resp.headers["Content-Length"] = itoa(resp.content.length());
return resp;
(void)env;
}
/**
* Parser wartosci kluczowych,uzywany do izolowania odpowiednich
* wartosci z parametrow zapytania HTTP
* @param src - string do parsowania
* @param separator - zadany do parsowania separator, zwykle &
* @return - zwraca sparsowana wartosc kluczowa
*
* */
StringMap parseKeyVals(std::string& src, std::string separator) {
StringMap ret;
std::string part, key, val;
size_t from = 0, amp, eq;
for (;;) {
amp = src.substr(from).find(separator);
part = src.substr(from, amp);
eq = part.find("=");
key = part.substr(0, eq);
val = part.substr(eq + 1);
ret[key] = val;
if (amp == std::string::npos) break;
from = from + amp + separator.length();
}
return ret;
}
/**
* Parser danych metody POST
* @param env - parametry zapytania HTTP
* @return sparsowane dane POST
* */
StringMap parsePostData(CSGI::Env& env) {
return parseKeyVals(env["csgi.input"], "&");
}
/**
* Parser ciasteczek
* @param src - string zrodlowy
* @return - sparsowane ciasteczko (separator: ;)
* */
StringMap parseCookies(std::string& src) {
return parseKeyVals(src, ";");
}
/**
* Sprawdza autoryzacje uzytkownika poprzez parsowanie parametrów zapytania HTTP
* @param env - parametry zapytania HTTP
* @return identyfikator uzytkownika sesji
* */
std::string Skunk::Server::isAuthed(CSGI::Env& env) {
StringMap cookies = parseCookies(env["HTTP_COOKIE"]);
return sessions_[cookies["sessionid"]];
}
/**
* Usuwa z ciasteczek biezaca sesje
* @param env - parametry zapytania HTTP
*
* */
void Skunk::Server::removeSession(CSGI::Env& env) {
StringMap cookies = parseCookies(env["HTTP_COOKIE"]);
sessions_[cookies["sessionid"]] = "";
}
/**
* Wyswietla strone logowania
* @return odpowiedz HTTP
*
* */
CSGI::Response showLoginScreen() {
CSGI::Response resp;
resp.status = 200;
///wyglad strony
resp.content.append("<!DOCTYPE html>\n<html>\n");
resp.content.append("\t<head><title>2012 SKUNKS LOGIN</title></head>\n");
resp.content.append("\t<body>");
resp.content.append("<form method='post' action='/'>");
resp.content.append("<p style='position:absolute; left:0px; top:0px;'> Username: <input name='user' type='text'/></p><br />");
resp.content.append("<p style='position:absolute; left:300px;top:0px;'> Password: <input name='pass' type='password' /></p>"
"<br />");
resp.content.append("<input style='postition:absolute; left:0px; top:50px;' type='submit' value='Zaloguj'/>");
resp.content.append("</form>");
resp.content.append("\n\t</body>\n</html>\n");
resp.headers["Content-Type"] = "text/html";
resp.headers["Content-Length"] = itoa(resp.content.length());
return resp;
}
/**
* Wyswietla ekran dodawania nowego uzytkownika w panelu admina
* @return odpowiedz HTTP
* */
CSGI::Response addNewUser(){
CSGI::Response resp;
resp.status = 200;
resp.content.append("<!DOCTYPE html>\n<html>\n");
resp.content.append("\t<head><title>2012 SKUNKS ADD NEW USER</title></head>\n");
resp.content.append("\t<body>");
resp.content.append("<form method='post' action='/adduser'>");
resp.content.append("<p style='position:absolute; left:0px; top:0px;'> New username: <input name='user' type='text'/></p><br />");
resp.content.append("<p style='position:absolute; left:500px;top:0px;'> Password: <input name='pass' type='text' /></p>"
"<br />");
resp.content.append("<input style='postition:absolute; left:0px; top:50px;' type='submit' value='Utworz nowego usera'/>");
resp.content.append("</form>");
resp.content.append("\n\t</body>\n</html>\n");
resp.headers["Content-Type"] = "text/html";
resp.headers["Content-Length"] = itoa(resp.content.length());
return resp;
}
/**
* Sprawdza URI oraz typ metody HTTP i przydziela odpowiednie widoki
* w zaleznosci od potrzeb
* URI - dalsza czesc adresu url
* @param env - parametry zapytania HTTP
*
* */
CSGI::Response Skunk::Server::operator()(CSGI::Env& env) {
std::string session = "";
std::string username = isAuthed(env);
if (env["REQUEST_URI"].compare("/logout") == 0) {
removeSession(env);
return showLoginScreen();
}
if (username.compare("") == 0) {
if (env["REQUEST_METHOD"].compare("POST") == 0) {
StringMap cred = parsePostData(env);
if (auth_->verify(cred["user"], cred["pass"])) {
session.append("SkunkSession");
session.append(cred["user"]);
session.append(itoa(rand()));
username = sessions_[session] = cred["user"];
} else {
return showLoginScreen();
}
} else {
return showLoginScreen();
}
}
if (env["REQUEST_METHOD"].compare("POST") == 0) {
StringMap data = parsePostData(env);
for (int i = 0; i < nextID_; i++) {
std::string id = "id" + itoa(i);
std::string idc = id + "_changed";
if (data[idc].compare("true") == 0) {
Widget *w = widgets_map_[id];
if (auth_->canPOST(username, w->id_)) {
std::string decoded = urldecoder(data[id]);
w->POST(decoded);
}
}
}
}
if ((env["REQUEST_URI"].compare("/adduser") == 0)&&(username=="admin")){
if (env["REQUEST_METHOD"].compare("POST") == 0) {
StringMap cred = parsePostData(env);
auth_->addUser(cred["user"],cred["pass"]);
}
else{
return addNewUser();
}
}
CSGI::Response resp = this->get(env, username);
if (session.length() > 0)
resp.headers["Set-Cookie"] = "sessionid=" + session
+ "; Max-Age=" + itoa(5*60);
//FIXME: Minute is too low
return resp;
}
/**
* Uruchamia server CSGI
* */
void Skunk::Server::run(bool async) {
srv = new CSGI::Server(this, 8080);
srv->run(async);
}