first commit
This commit is contained in:
Manish
@ -0,0 +1,376 @@
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/**
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* Observe how the user enters content into the comment form in order to determine whether it's a bot or not.
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*
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* Note that no actual input is being saved here, only counts and timings between events.
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*/
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( function() {
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// Passive event listeners are guaranteed to never call e.preventDefault(),
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// but they're not supported in all browsers. Use this feature detection
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// to determine whether they're available for use.
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var supportsPassive = false;
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try {
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var opts = Object.defineProperty( {}, 'passive', {
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get : function() {
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supportsPassive = true;
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}
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} );
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window.addEventListener( 'testPassive', null, opts );
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window.removeEventListener( 'testPassive', null, opts );
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} catch ( e ) {}
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function init() {
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var input_begin = '';
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var keydowns = {};
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var lastKeyup = null;
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var lastKeydown = null;
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var keypresses = [];
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var modifierKeys = [];
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var correctionKeys = [];
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var lastMouseup = null;
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var lastMousedown = null;
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var mouseclicks = [];
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var mousemoveTimer = null;
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var lastMousemoveX = null;
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var lastMousemoveY = null;
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var mousemoveStart = null;
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var mousemoves = [];
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var touchmoveCountTimer = null;
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var touchmoveCount = 0;
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var lastTouchEnd = null;
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var lastTouchStart = null;
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var touchEvents = [];
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var scrollCountTimer = null;
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var scrollCount = 0;
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var correctionKeyCodes = [ 'Backspace', 'Delete', 'ArrowUp', 'ArrowDown', 'ArrowLeft', 'ArrowRight', 'Home', 'End', 'PageUp', 'PageDown' ];
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var modifierKeyCodes = [ 'Shift', 'CapsLock' ];
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var forms = document.querySelectorAll( 'form[method=post]' );
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for ( var i = 0; i < forms.length; i++ ) {
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var form = forms[i];
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var formAction = form.getAttribute( 'action' );
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// Ignore forms that POST directly to other domains; these could be things like payment forms.
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if ( formAction ) {
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// Check that the form is posting to an external URL, not a path.
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if ( formAction.indexOf( 'http://' ) == 0 || formAction.indexOf( 'https://' ) == 0 ) {
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if ( formAction.indexOf( 'http://' + window.location.hostname + '/' ) != 0 && formAction.indexOf( 'https://' + window.location.hostname + '/' ) != 0 ) {
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continue;
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}
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}
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}
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form.addEventListener( 'submit', function () {
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var ak_bkp = prepare_timestamp_array_for_request( keypresses );
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var ak_bmc = prepare_timestamp_array_for_request( mouseclicks );
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var ak_bte = prepare_timestamp_array_for_request( touchEvents );
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var ak_bmm = prepare_timestamp_array_for_request( mousemoves );
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var input_fields = {
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// When did the user begin entering any input?
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'bib': input_begin,
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// When was the form submitted?
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'bfs': Date.now(),
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// How many keypresses did they make?
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'bkpc': keypresses.length,
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// How quickly did they press a sample of keys, and how long between them?
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'bkp': ak_bkp,
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// How quickly did they click the mouse, and how long between clicks?
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'bmc': ak_bmc,
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// How many mouseclicks did they make?
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'bmcc': mouseclicks.length,
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// When did they press modifier keys (like Shift or Capslock)?
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'bmk': modifierKeys.join( ';' ),
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// When did they correct themselves? e.g., press Backspace, or use the arrow keys to move the cursor back
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'bck': correctionKeys.join( ';' ),
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// How many times did they move the mouse?
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'bmmc': mousemoves.length,
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// How many times did they move around using a touchscreen?
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'btmc': touchmoveCount,
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// How many times did they scroll?
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'bsc': scrollCount,
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// How quickly did they perform touch events, and how long between them?
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'bte': ak_bte,
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// How many touch events were there?
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'btec' : touchEvents.length,
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// How quickly did they move the mouse, and how long between moves?
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'bmm' : ak_bmm
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};
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var akismet_field_prefix = 'ak_';
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if ( this.getElementsByClassName ) {
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// Check to see if we've used an alternate field name prefix. We store this as an attribute of the container around some of the Akismet fields.
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var possible_akismet_containers = this.getElementsByClassName( 'akismet-fields-container' );
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for ( var containerIndex = 0; containerIndex < possible_akismet_containers.length; containerIndex++ ) {
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var container = possible_akismet_containers.item( containerIndex );
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if ( container.getAttribute( 'data-prefix' ) ) {
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akismet_field_prefix = container.getAttribute( 'data-prefix' );
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break;
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}
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}
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}
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for ( var field_name in input_fields ) {
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var field = document.createElement( 'input' );
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field.setAttribute( 'type', 'hidden' );
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field.setAttribute( 'name', akismet_field_prefix + field_name );
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field.setAttribute( 'value', input_fields[ field_name ] );
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this.appendChild( field );
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}
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}, supportsPassive ? { passive: true } : false );
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form.addEventListener( 'keydown', function ( e ) {
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// If you hold a key down, some browsers send multiple keydown events in a row.
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// Ignore any keydown events for a key that hasn't come back up yet.
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if ( e.key in keydowns ) {
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return;
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}
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var keydownTime = ( new Date() ).getTime();
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keydowns[ e.key ] = [ keydownTime ];
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if ( ! input_begin ) {
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input_begin = keydownTime;
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}
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// In some situations, we don't want to record an interval since the last keypress -- for example,
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// on the first keypress, or on a keypress after focus has changed to another element. Normally,
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// we want to record the time between the last keyup and this keydown. But if they press a
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// key while already pressing a key, we want to record the time between the two keydowns.
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var lastKeyEvent = Math.max( lastKeydown, lastKeyup );
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if ( lastKeyEvent ) {
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keydowns[ e.key ].push( keydownTime - lastKeyEvent );
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}
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lastKeydown = keydownTime;
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}, supportsPassive ? { passive: true } : false );
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form.addEventListener( 'keyup', function ( e ) {
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if ( ! ( e.key in keydowns ) ) {
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// This key was pressed before this script was loaded, or a mouseclick happened during the keypress, or...
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return;
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}
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var keyupTime = ( new Date() ).getTime();
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if ( 'TEXTAREA' === e.target.nodeName || 'INPUT' === e.target.nodeName ) {
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if ( -1 !== modifierKeyCodes.indexOf( e.key ) ) {
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modifierKeys.push( keypresses.length - 1 );
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} else if ( -1 !== correctionKeyCodes.indexOf( e.key ) ) {
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correctionKeys.push( keypresses.length - 1 );
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} else {
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// ^ Don't record timings for keys like Shift or backspace, since they
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// typically get held down for longer than regular typing.
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var keydownTime = keydowns[ e.key ][0];
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var keypress = [];
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// Keypress duration.
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keypress.push( keyupTime - keydownTime );
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// Amount of time between this keypress and the previous keypress.
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if ( keydowns[ e.key ].length > 1 ) {
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keypress.push( keydowns[ e.key ][1] );
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}
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keypresses.push( keypress );
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}
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}
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delete keydowns[ e.key ];
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lastKeyup = keyupTime;
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}, supportsPassive ? { passive: true } : false );
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form.addEventListener( "focusin", function ( e ) {
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lastKeydown = null;
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lastKeyup = null;
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keydowns = {};
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}, supportsPassive ? { passive: true } : false );
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form.addEventListener( "focusout", function ( e ) {
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lastKeydown = null;
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lastKeyup = null;
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keydowns = {};
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}, supportsPassive ? { passive: true } : false );
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}
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document.addEventListener( 'mousedown', function ( e ) {
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lastMousedown = ( new Date() ).getTime();
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}, supportsPassive ? { passive: true } : false );
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document.addEventListener( 'mouseup', function ( e ) {
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if ( ! lastMousedown ) {
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// If the mousedown happened before this script was loaded, but the mouseup happened after...
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return;
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}
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var now = ( new Date() ).getTime();
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var mouseclick = [];
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mouseclick.push( now - lastMousedown );
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if ( lastMouseup ) {
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mouseclick.push( lastMousedown - lastMouseup );
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}
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mouseclicks.push( mouseclick );
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lastMouseup = now;
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// If the mouse has been clicked, don't record this time as an interval between keypresses.
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lastKeydown = null;
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lastKeyup = null;
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keydowns = {};
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}, supportsPassive ? { passive: true } : false );
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document.addEventListener( 'mousemove', function ( e ) {
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if ( mousemoveTimer ) {
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clearTimeout( mousemoveTimer );
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mousemoveTimer = null;
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}
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else {
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mousemoveStart = ( new Date() ).getTime();
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lastMousemoveX = e.offsetX;
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lastMousemoveY = e.offsetY;
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}
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mousemoveTimer = setTimeout( function ( theEvent, originalMousemoveStart ) {
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var now = ( new Date() ).getTime() - 500; // To account for the timer delay.
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var mousemove = [];
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mousemove.push( now - originalMousemoveStart );
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mousemove.push(
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Math.round(
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Math.sqrt(
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Math.pow( theEvent.offsetX - lastMousemoveX, 2 ) +
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Math.pow( theEvent.offsetY - lastMousemoveY, 2 )
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)
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)
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);
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if ( mousemove[1] > 0 ) {
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// If there was no measurable distance, then it wasn't really a move.
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mousemoves.push( mousemove );
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}
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mousemoveStart = null;
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mousemoveTimer = null;
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}, 500, e, mousemoveStart );
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}, supportsPassive ? { passive: true } : false );
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document.addEventListener( 'touchmove', function ( e ) {
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if ( touchmoveCountTimer ) {
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clearTimeout( touchmoveCountTimer );
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}
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touchmoveCountTimer = setTimeout( function () {
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touchmoveCount++;
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}, 500 );
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}, supportsPassive ? { passive: true } : false );
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document.addEventListener( 'touchstart', function ( e ) {
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lastTouchStart = ( new Date() ).getTime();
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}, supportsPassive ? { passive: true } : false );
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document.addEventListener( 'touchend', function ( e ) {
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if ( ! lastTouchStart ) {
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// If the touchstart happened before this script was loaded, but the touchend happened after...
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return;
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}
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var now = ( new Date() ).getTime();
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var touchEvent = [];
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touchEvent.push( now - lastTouchStart );
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if ( lastTouchEnd ) {
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touchEvent.push( lastTouchStart - lastTouchEnd );
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}
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touchEvents.push( touchEvent );
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lastTouchEnd = now;
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// Don't record this time as an interval between keypresses.
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lastKeydown = null;
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lastKeyup = null;
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keydowns = {};
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}, supportsPassive ? { passive: true } : false );
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document.addEventListener( 'scroll', function ( e ) {
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if ( scrollCountTimer ) {
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clearTimeout( scrollCountTimer );
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}
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scrollCountTimer = setTimeout( function () {
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scrollCount++;
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}, 500 );
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}, supportsPassive ? { passive: true } : false );
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}
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/**
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* For the timestamp data that is collected, don't send more than `limit` data points in the request.
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* Choose a random slice and send those.
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*/
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function prepare_timestamp_array_for_request( a, limit ) {
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if ( ! limit ) {
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limit = 100;
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}
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var rv = '';
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if ( a.length > 0 ) {
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var random_starting_point = Math.max( 0, Math.floor( Math.random() * a.length - limit ) );
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for ( var i = 0; i < limit && i < a.length; i++ ) {
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rv += a[ random_starting_point + i ][0];
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if ( a[ random_starting_point + i ].length >= 2 ) {
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rv += "," + a[ random_starting_point + i ][1];
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}
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rv += ";";
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}
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}
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return rv;
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}
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if ( document.readyState !== 'loading' ) {
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init();
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} else {
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document.addEventListener( 'DOMContentLoaded', init );
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}
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})();
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Reference in New Issue
Block a user