phantomjs not waiting for full page load

Question

I m using PhantomJS v1 4 1 to load some web pages  I don t have access to their server-side  I just getting links pointing to them  I m using obsolete version of Phantom because I need to support Adobe Flash on that web pages   The problem is many web-sites are loading their minor content async and that s why Phantom s onLoadFinished callback  analogue for onLoad in HTML  fired too early when not everything still has loaded  Can anyone suggest how can I wait for full load of a webpage to make  for example  a screenshot with all dynamic content like ads

User · Answer

this is my solution its worked for me    page onConsoleMessage   function msg  lineNum  sourceId         if msg   hey lets take screenshot                 window setInterval function                      try                                               var sta  page evaluateJavaScript  function    return jQuery active                                            if sta    0                                               window setTimeout function                            page render  test png                            clearInterval                            phantom exit                          1000                                                catch error                                console log error                   phantom exit 1                          1000                     page open address  function  status              if  status      success             console log  Unable to load url            phantom exit          else           page setContent page content replace   lt  body gt     lt script gt window onload   function   console log   hey lets take screenshot      lt  script gt  lt  body gt     address

User · Answer

You could try a combination of the waitfor and rasterize examples          See https   github com ariya phantomjs blob master examples waitfor js        Wait until the test condition is true or a timeout occurs  Useful for waiting    on a server response or for a ui change  fadeIn  etc   to occur         param testFx javascript condition that evaluates to a boolean     it can be passed in as a string  e g    1    1  or      bar   is   visible    or    as a callback function      param onReady what to do when testFx condition is fulfilled     it can be passed in as a string  e g    1    1  or      bar   is   visible    or    as a callback function      param timeOutMillis the max amount of time to wait  If not specified  3 sec is used      function waitFor testFx  onReady  timeOutMillis        var maxtimeOutMillis   timeOutMillis   timeOutMillis   3000     lt  Default Max Timout is 3s         start   new Date   getTime            condition    typeof testFx       string    eval testFx    testFx        lt  defensive code         interval   setInterval function                 if    new Date   getTime   - start  lt  maxtimeOutMillis   amp  amp   condition                        If not time-out yet and condition not yet fulfilled                 condition    typeof testFx       string    eval testFx    testFx        lt  defensive code               else                   if  condition                           If condition still not fulfilled  timeout but condition is  false                       console log   waitFor    timeout                        phantom exit 1                     else                          Condition fulfilled  timeout and or condition is  true                       console log   waitFor    finished in      new Date   getTime   - start     ms                         typeof onReady       string    eval onReady    onReady       lt  Do what it s supposed to do once the condition is fulfilled                     clearInterval interval      lt  Stop this interval                                            250      lt  repeat check every 250ms     var page   require  webpage   create    system   require  system    address  output  size   if  system args length  lt  3    system args length  gt  5        console log  Usage  rasterize js URL filename  paperwidth paperheight paperformat   zoom         console log    paper  pdf output  examples   5in 7 5in    10cm 20cm    A4    Letter         phantom exit 1     else       address   system args 1       output   system args 2       if  system args length  gt  3  amp  amp  system args 2  substr -4        pdf             size   system args 3  split               page paperSize   size length     2                 width   size 0               height   size 1               margin    0px                            format   system args 3               orientation    portrait               margin                     left    5mm                   top    8mm                   right    5mm                   bottom    9mm                                     if  system args length  gt  4            page zoomFactor   system args 4             var resources           page onResourceRequested   function request            resources request id    request stage             page onResourceReceived   function response            resources response id    response stage             page open address  function status            if  status      success                 console log  Unable to load the address                 phantom exit              else               waitFor function                        Check in the page if a specific element is now visible                 for   var i   1  i  lt  resources length    i                        if  resources i      end                             return false                                                          return true                 function                    page render output                  phantom exit                   10000

User · Answer

I would rather periodically check for document readyState status  https   developer mozilla org en-US docs Web API document readyState   Although this approach is a bit clunky  you can be sure that inside onPageReady function you are using fully loaded document   var page   require  webpage   create        url    http   example com index html    function onPageReady         var htmlContent   page evaluate function              return document documentElement outerHTML               console log htmlContent        phantom exit       page open url  function  status        function checkReadyState             setTimeout function                  var readyState   page evaluate function                      return document readyState                               if   complete      readyState                    onPageReady                  else                   checkReadyState                                         checkReadyState          Additional explanation   Using nested setTimeout instead of setInterval prevents checkReadyState from  overlapping  and race conditions when its execution is prolonged for some random reasons  setTimeout has a default delay of 4ms  https   stackoverflow com a 3580085 1011156  so active polling will not drastically affect program performance   document readyState      complete  means that document is completely loaded with all resources  https   html spec whatwg org multipage dom html current-document-readiness

User · Answer

This is an old question  but since I was looking for full page load but for Spookyjs  that uses casperjs and phantomjs  and didn t find my solution  I made my own script for that  with the same approach as the user deemstone   What this approach does is  for a given quantity of time  if the page did not receive or started any request it will end the execution   On casper js file  if you installed it globally  the path would be something like  usr local lib node modules casperjs modules casper js  add the following lines   At the top of the file with all the global vars   var waitResponseInterval   500 var reqResInterval   null var reqResFinished   false var resetTimeout   function        Then inside function  createPage casper   just after  var page   require  webpage   create     add the following code    resetTimeout   function          if reqResInterval           clearTimeout reqResInterval        reqResInterval   setTimeout function             reqResFinished   true          page onLoadFinished  success          waitResponseInterval      resetTimeout     Then inside  page onResourceReceived   function onResourceReceived resource     on the first line add    resetTimeout     Do the same for  page onResourceRequested   function onResourceRequested requestData  request      Finally  on  page onLoadFinished   function onLoadFinished status     on the first line add    if  reqResFinished           return     reqResFinished   false   And that s it  hope this one helps someone in trouble like I was  This solution is for casperjs but works directly for Spooky   Good luck

User · Answer

I use a personnal blend of the phantomjs waitfor js example   This is my main js file    use strict    var wasSuccessful   phantom injectJs    lib waitFor js    var page   require  webpage   create     page open  http   foo com   function status      if  status      success         page includeJs  https   cdnjs cloudflare com ajax libs jquery 3 1 1 jquery min js   function           waitFor function             return page evaluate function               if   complete      document readyState                return true                         return false                       function             var fooText   page evaluate function               return     foo   text                         phantom exit                          else       console log  error        phantom exit 1             And the lib waitFor js file  which is just a copy and paste of the waifFor   function from the phantomjs waitfor js example    function waitFor testFx  onReady  timeOutMillis        var maxtimeOutMillis   timeOutMillis   timeOutMillis   3000     lt  Default Max Timout is 3s         start   new Date   getTime            condition   false          interval   setInterval function                 if    new Date   getTime   - start  lt  maxtimeOutMillis   amp  amp   condition                        If not time-out yet and condition not yet fulfilled                 condition    typeof testFx       string    eval testFx    testFx        lt  defensive code               else                   if  condition                           If condition still not fulfilled  timeout but condition is  false                       console log   waitFor    timeout                        phantom exit 1                     else                          Condition fulfilled  timeout and or condition is  true                          console log   waitFor    finished in      new Date   getTime   - start     ms                         typeof onReady       string    eval onReady    onReady       lt  Do what it s supposed to do once the condi gt                      clearInterval interval      lt  Stop this interval                                            250      lt  repeat check every 250ms     This method is not asynchronous but at least am I assured that all the resources were loaded before I try using them

User · Answer

In my program  I use some logic to judge if it was onload  watching it s network request  if there was no new request on past 200ms  I treat it onload   Use this  after onLoadFinish     function onLoadComplete page  callback       var waiting           request id     var interval   200     ms time waiting new request     var timer   setTimeout  timeout  interval       var max retry   3          var counter retry   0       function timeout            if waiting length  amp  amp  counter retry  lt  max retry               timer   setTimeout  timeout  interval               counter retry                return           else              try                  callback null  page                catch e                           for debug  log time cost     var tlogger            bindEvent page   request   function req           waiting push req id                bindEvent page   receive   function  res            var cT   res contentType          if  cT               console log   contentType     cT     url     res url                     if  cT  return remove res id           if cT indexOf  application     cT indexOf  text      0  return remove res id            if  res stage      start                 console log    received start     res id                 console log  JSON stringify res                 tlogger res id    new Date             else if  res stage      end                 console log    received end     res id   new Date   - tlogger res id                    console log  JSON stringify res                 remove res id                clearTimeout timer               timer   setTimeout timeout  interval                           bindEvent page   error   function err           remove err id           if waiting length     0               counter retry   0                         function remove id           var i   waiting indexOf  id            if i  lt  0               return           else              waiting splice i 1                        function bindEvent page  evt  cb           switch evt               case  request                   page onResourceRequested   cb                  break              case  receive                   page onResourceReceived   cb                  break              case  error                   page onResourceError   cb                  break              case  timeout                   page onResourceTimeout   cb                  break

User · Answer

Do Mouse move while page is loading should work   page sendEvent  click  200  660    do   phantom page sendEvent  mousemove      while  page loading    UPDATE When submitting the form  nothing was returned  so the program stopped  The program did not wait for the page to load as it took a few seconds for the redirect to begin  telling it to move the mouse until the URL changes to the home page gave the browser as much time as it needed to change  then telling it to wait for the page to finish loading allowed the page to full load before the content was grabbed  page evaluate function      document getElementsByClassName  btn btn-primary btn-block   0  click        do   phantom page sendEvent  mousemove      while  page evaluate function     return document location     quot https   www bestwaywholesale co uk  quot        do   phantom page sendEvent  mousemove      while  page loading

User · Answer

I found this solution useful in a NodeJS app   I use it just in desperate cases because it launches a timeout in order to wait for the full page load    The second argument is the callback function which is going to be called once the response is ready    phantom   require  phantom     var fullLoad   function anUrl  callbackDone        phantom create function  ph            ph createPage function  page                page open anUrl  function  status                    if  status      success                         console error  pahtom  error opening     anUrl  status                       ph exit                      else                          timeOut                     global setTimeout function                              page evaluate function                                  return document documentElement innerHTML                             function  result                                ph exit       EXTREMLY IMPORTANT                             callbackDone result      callback                                                    5000                                                            var callback   function htmlBody           do smth with the htmlBody    fullLoad  your url    callback

User · Answer

Another approach is to just ask PhantomJS to wait for a bit after the page has loaded before doing the render  as per the regular rasterize js example  but with a longer timeout to allow the JavaScript to finish loading additional resources   page open address  function  status        if  status      success             console log  Unable to load the address             phantom exit          else           window setTimeout function                  page render output               phantom exit               1000      Change timeout as required to allow sufficient time

User · Answer

Here is a solution that waits for all resource requests to complete  Once complete it will log the page content to the console and generate a screenshot of the rendered page  Although this solution can serve as a good starting point  I have observed it fail so it s definitely not a complete solution  I didn t have much luck using document readyState  I was influenced by the waitfor js example found on the phantomjs examples page  var system   require  system    var webPage   require  webpage     var page   webPage create    var url   system args 1    page viewportSize       width  1280    height  720     var requestsArray        page onResourceRequested   function requestData  networkRequest      requestsArray push requestData id       page onResourceReceived   function response      var index   requestsArray indexOf response id     if  index  gt  -1  amp  amp  response stage      end         requestsArray splice index  1           page open url  function status       var interval   setInterval function           if  requestsArray length     0           clearInterval interval         var content   page content        console log content         page render  yourLoadedPage png          phantom exit               500

User · Answer

I found this approach useful in some cases   page onConsoleMessage function msg         do something e g  page render       Than if you own the page put some script inside    lt script gt    window onload   function        console log  page loaded         lt  script gt

User · Answer

This the code I use   var system   require  system    var page   require  webpage   create     page open  http          function          console log page content         var k   0         var loop   setInterval function              var qrcode   page evaluate function s                 return document querySelector s  src                 qrcode img               k              if  qrcode                console log  dataURI    qrcode                clearInterval loop                phantom exit                           if  k     50  phantom exit       10 sec timeout          200           Basically given the fact you re supposed to know that the page is full downloaded when a given element appears on the DOM  So the script is going to wait until this happens

User · Answer

Maybe you can use the onResourceRequested and onResourceReceived callbacks to detect asynchronous loading  Here s an example of using those callbacks from their documentation   var page   require  webpage   create    page onResourceRequested   function  request        console log  Request     JSON stringify request  undefined  4       page onResourceReceived   function  response        console log  Receive     JSON stringify response  undefined  4       page open url     Also  you can look at examples netsniff js for a working example

User · Answer

This is an implementation of Supr s answer  Also it uses setTimeout instead of setInterval as Mateusz Charytoniuk suggested   Phantomjs will exit in 1000ms when there isn t any request or response      load the module var webpage   require  webpage       get timestamp function getTimestamp           or use Date now       return new Date   getTime       var lastTimestamp   getTimestamp     var page   webpage create    page onResourceRequested   function request           update the timestamp when there is a request     lastTimestamp   getTimestamp       page onResourceReceived   function response           update the timestamp when there is a response     lastTimestamp   getTimestamp        page open html  function status        if  status      success                exit if it fails to load the page         phantom exit 1             else             do something here            function checkReadyState         setTimeout function              var curentTimestamp   getTimestamp            if curentTimestamp-lastTimestamp gt 1000                  exit if there isn t request or response in 1000ms             phantom exit                      else              checkReadyState                     100      checkReadyState

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