मॉस्को मेट्रो के वाई-फाई में एक एंड्रॉइड डिवाइस का स्वचालित प्रमाणीकरण

function getUrl(url1,url2){
    url1=url1.split('?')[0];
    return url2.length?
        (/^http(s?):\/\//i.test(url2)?url2:
            (url2[0]=='/'?url1.split('/').slice(0,3).join('/')+url2:url1.split('/').slice(0,-1).join('/')+'/'+url2)
        ):url1;
}

function getVars(form,tag){
    vars='';
    fields=form.getElementsByTagName(tag);
    for(i=0;i<fields.length;i++)
        vars=vars+(i?'&':'')+fields[i].name+'='+fields[i].value;
    return vars;
}

function submit(xhr,request,form){
    request.url=getUrl(request.url,form.action);
    request.method=form.method;
    vars1=getVars(form,'input');
    vars2=getVars(form,'textarea');
    request.vars=vars1||vars2?(vars1?vars1:'')+(vars1&&vars2?'&':'')+(vars2?vars2:''):null;
    getPage(request,processPage,xhr);
}

function processPage(xhr,request){
    redir=xhr.getResponseHeader('Location');
    if(redir){
        if(redir==request.url) finalize(':  ');
        else{
            log('\n\n');
            getPage({'url':redir},processPage,xhr);
        }
    } else {
        forms=local('forms').split(',');
        id=null;
        for(i=0;i<forms.length;i++)
            if(xhr.response.getElementById(forms[i])) id=forms[i];
        if(id)submit(xhr,request,xhr.response.getElementById(id));
        else if(Number(local('debug'))){
            log('  :\n');
            forms=xhr.response.getElementsByTagName('form');
            if(forms.length)
                for(i=0;i<forms.length;i++)
                    log((i?', "':'"')+forms[i].id+'"');
            else log('');
            finalize();
        } else finalize(' ');
    }
}

function checkConn(xhr,request){
    redir=xhr.getResponseHeader('Location');
    if(redir){
        log('\n\n');
        getPage({'url':redir},processPage,xhr);
    } else {
        log('  ');
        finalize();
    }
}

function log(txt){
    logs=logs+(txt?txt:'');
}

function requestToText(request){
    return 'URL: '+request.url+'\nMethod: '+request.method+', Vars: '+request.vars+'\n\n';
}

function finalize(txt){
    log(txt);
    if(Number(local('debug'))) alert(logs);
    else if(txt) flashLong(txt);
    exit();
}

function getPage(request,func,xhr){
    if(!request.method) request.method='GET';
    if(!request.vars) request.vars=null;
    if(!xhr){
        xhr=new XMLHttpRequest();
        xhr.responseType="document";
        xhr.timeout=20*1000;
    }
    xhr.open(request.method,request.url,true);
    xhr.onload=function(){
        if(xhr.status==200 || xhr.status==401){
            log (requestToText(request)+'HTTP status: '+xhr.status+' '+xhr.statusText+'\n');
            func(xhr,request);
        } else {
            log(requestToText(request));
            finalize(' HTTP: '+xhr.status+' '+xhr.statusText);
        }
    }
    xhr.onerror=function(){
        log(requestToText(request));
        finalize(':  ');
    }
    xhr.ontimeout=function(){
        log(requestToText(request));
        finalize(':  ');
    }
    xhr.send(request.vars);
}

logs='';
getPage({'url':local('url')},checkConn);

function getUrl(url1,url2){
  url1=url1.split('?')[0];
  return url2.length?
    (/^http(s?):\/\//i.test(url2)?
      url2:
        (url2[0]=='/'?
        url1.split('/').slice(0,3).join('/')+url2:
        url1.split('/').slice(0,-1).join('/')+
      '/'+url2)
    ):url1;
}

function getVars(form,tag){
  vars='';
  fields=form.getElementsByTagName(
    tag);
  for(i=0;i<fields.length;i++)
    vars=vars+(i?'&':'')+fields[i].name+
      '='+fields[i].value;
  return vars;
}

function submit(xhr,request,form){
  request.url=getUrl(request.url,
    form.action);
  request.method=form.method;
  vars1=getVars(form,'input');
  vars2=getVars(form,'textarea');
  request.vars=vars1||vars2?
    (vars1?vars1:'')+
    (vars1&&vars2?'&':'')+
    (vars2?vars2:'')
    :null;
  getPage(request,processPage,xhr);
}

function processPage(xhr,request){
  redir=xhr.getResponseHeader(
    'Location');
  if(redir){
    if(redir==request.url)
      finalize(':  '+
        '');
    else{
      log('\n\n');
      getPage({'url':redir},processPage,
        xhr);
    }
  } else {
    forms=local('forms').split(',');
    id=null;
    for(i=0;i<forms.length;i++)
      if(xhr.response.getElementById(
          forms[i]))
        id=forms[i];
    if(id)submit(xhr,request,
      xhr.response.getElementById(id));
    else if(Number(local('debug'))){
      log('  :\n');
      forms=xhr.response.
        getElementsByTagName('form');
      if(forms.length)
        for(i=0;i<forms.length;i++)
          log((i?', "':'"')+forms[i].id+'"');
      else log('');
      finalize();
    } else finalize(
      ' ');
  }
}

function checkConn(xhr,request){
  redir=xhr.getResponseHeader(
    'Location');
  if(redir){
    log('\n\n');
    getPage({'url':redir},processPage,
      xhr);
  } else {
    log('  '+
      '');
    finalize();
  }
}

function log(txt){logs=logs+(txt?txt:'');}

function requestToText(request){
  return 'URL: '+request.url+
    '\nMethod: '+request.method+
    ', Vars: '+request.vars+'\n\n';
}

function finalize(txt){
  log(txt);
  if(Number(local('debug'))) alert(logs);
  else if(txt) flashLong(txt);
  exit();
}

function getPage(request,func,xhr){
  if(!request.method)
    request.method='GET';
  if(!request.vars)request.vars=null;
  if(!xhr){
    xhr=new XMLHttpRequest();
    xhr.responseType="document";
    xhr.timeout=20*1000;
  }
  xhr.open(request.method,
    request.url,true);
  xhr.onload=function(){
    if(xhr.status==200 ||
        xhr.status==401){
      log (requestToText(request)+
        'HTTP status: '+xhr.status+' '+
        xhr.statusText+'\n');
        func(xhr,request);
    } else {
      log(requestToText(request));
      finalize(' HTTP: '+
        xhr.status+' '+xhr.statusText);
    }
  }
  xhr.onerror=function(){
    log(requestToText(request));
    finalize(':  '+
      '');
  }
  xhr.ontimeout=function(){
    log(requestToText(request));
    finalize(':  '+
      '');
  }
  xhr.send(request.vars);
}

logs='';
getPage({'url':local('url')},checkConn);