i have the following question:
i'm currently working with a software(MicroStrategy, BI) wich has a functionality that exports reports to pdf, it works something like this:
each report has an unique ID, so you select the report to export, and with jsp i send this report's id to the exporting tool, and it generates a complete URL with some parameters that the MicroStrategy server will read to generate the PDF.
What i'm trying is to capture this pdf url and send it to a Java method that will save this pdf in the hard drive without prompting anything to the user.
My problem is that this URL doesn't generate instantly, it takes a while, AND, some redirections are made in the process.
So, after all that chitchat, how can i capture that damn URL?
What i'm doing is making the pdf load into an iframe, and then extracting the url with a js code i found searching, assigning it to a JSP variable, and then, once i have the pdf url, call the Java Method. But it is not working.
The JavaScript function is this:
<script language="text/javascript">
function getSrc()
{
var CurrentUrl = document.getElementById('miframe').contentWindow.location.href;
if(currentUrl.substr(length-5)==".pdf")
{
return currentUrl;
}
else
{
setTimeout(getSrc(),5000);
}
}
</script>
and this is the call i make to it:
<% jsp code
String currentUrl="<script>document.writeln(getSrc();)</script>";
more jsp code %>
The rest of the code is actually fine, tried it with a normal pdf URL and it saved the pdf into the disk.
Hope it is understadable, and thanks in advance!
Your main problem is that you are calling getSrc, not passing it to setTimeout (you are actually passing null to setTimeout, unless the second call to getSrc happens to work, in which case you are passing a string, which setTimeout can't process due to "syntax errors".
Instead, use setTimeout(getSrc,5000); - no parentheses after getSrc. This passes the function, rather than its result.
Also, currentUrl.substr(length-5) is wrong, partly because length is undefined (you need currentUrl.length in there), and partly because you need -4 to get the last four characters.
I don't know what kind of access you have to MicroStrategy, but there is a MicroStrategy java api that will allow you to execute the document and get pdf without capturing the url.
Check out their Knowledge Base for examples.
Why don't you just save the report/document with PDF format as default, in this way when you open the report it will automatically generated in PDF.
If you don't like the idea to save a report in PDF (for example because you need it also as regular report and you don't want to maintain two version of the same object), you can use URLAPI to generate the PDF using &executionMode=3 and ¤tViewMedia=32.
Not sure about these parameters, the best way for you to figure out which they are (beside some MicroStrategy TN) is to export the report in PDF and check the url.
Related
I have an jQuery('#Frame').animate360 script on page and it calls a file called Profile.xml to get its settings etc.
Problem is Profile.xml is on Azure Blob and is in uppercase (PROFILE.XML). This means a 404 file not found error.
I can't change filename(Profile.xml) on azure.
The piece of JS that calls the Profile.xml seems to be encrypted in a library (HTML5Loader.js) i.e. The text 'Profile.xml' does not appear in any file and can only be found with chrome debugger in an unnamed file.
My instinct was to use something like Application_BeginRequest etc to catch a 'call' to https://storageblabla.blob.core.windows.net/uploads/ALPHA/3DIMAGES/1.010659/Profile.xml
and change it to ...../PROFILE.XML
but it's to late at that stage. It already knows that its a 404.
There must be some access, with code, to a point where a remote url is being called that can be intercepted.
Rekon its a one line fix but I just can't find the right term to search on.
In our web portal we generate PDFs for certain kinds of data. The user downloads the PDF by clicking an tag that references something that we return with content-type: application/pdf;charset=utf-8
This works well when it works; the browser realizes that it is getting a PDF file and opens a internal or external PDF reader, or asks the user to save the file, depending on browser and user configuration.
We have some cases where we may fail to generate the PDF though. First we didn't handle the error, a NullPointerException fell through and we got an ugly new page full of JSON formatted garbage. Then we tried returning an empty result, which the browser thinks is fine and just saves or sends an empty file. Then I tried returning a redirect, which confused Chrome which showed an alert telling the user that something strange was happening.
The href in the tag is on the format "/module/showmypdf.cmd?pdfid=67482". This, as I said, works fine when a valid pdf is returned.
So, is there any kind of best practice for error handling when it comes to sending non-HTML files to browsers? Is there something else I could try to make the browser interpret my response as a redirect?
Ok I figured out why the redirect didn't work. I was doing this in my Java Spring controller:
response.sendRedirect("redirect:mypage.html?pdfError=true");
The "redirect:" prefix is something you can use when returning the view name from a controller. In the sendDirect() call it only adds confusion. Removing "redirect:" fixed it.
I know there is a lot about this, but I can't find a solution that fits my situation. I am following behind someone else's asp.net code. We have a large amount of html and xml files generated by our site that a user can see. In one place, the link dynamically generated to load one of these pages is actually in a miniature form, making the browser think data is being submitted and looking for something 'new.' But the other is a button with the link generated in the vb code behind using a javascript function to open the page in a new window. I have tried simulating a form submit with "?submit=....." at the end but it didn't work.
tl;dr What javascript function can open a page and tell the browser to get the newest version, ignoring cache?
In JavaScript, I think the only way to prevent caching is to modify the url. One trick is to use the current date as timestamp:
url = url + "?_ts="+new Date().getTime();
(of course if your url already includes a querystring then replace the ? with an &)
There is no JavaScript to do what you need. If you need a fresh version, the easiest way is to add a timestamp to the URL's query string.
<script type="text/javascript" src="/js/file?cacheBuster=<?= DateTime.Now ?>" > </script>
For better control, you can use a build version as your cacheBuster param so you don't have to request new files every time.
I'm looking to build a cross-site bookmarklet that gets a highlighted word, passes it to a CodeIgniter method (domain.com/controller/method), and returns the definition via a dictionary API. I've got a skeleton working well on a single domain, but I'm looking to expand it to use JSONP cross-domain. But I feel unclear.
I know I need to load a script from a remote location and inject it in the current context. And I believe I'll need to get the highlighted word on a page, then call a URL that looks like domain.com/controller/method/word to get that script. Then it gets foggy.
I think I essentially have two questions:
Where do I include the necessary javascript to handle the parsing and passing of the word via XMLHTTPRequest? I think this will be the SRC of the script that I'll inject in the new context. Is this somehow within my relevant CodeIgniter method? Or does this new script come from a random location on the same server as the relevant method and simply call to it?
Answer: This is not supplementary to XMLHTTPRequest, this is in lieu of it, so that step is completely removed. The new script calls to the method, passes requisite information via query strings, and receives the JSON array in response.
Am I correct in understanding I'll eventually pass the JSON response from the method back as word(json_encode($array));?
Answer: Yes, I'll pass that back as callbackFunctionName(json_encode($array));.
Do I need to set headers, as done here?
Update
I included the answers to two of my three answers above. If someone can explain things thoroughly, of course I'll mark their answer as correct, else I'll elaborate my stumbling blocks in an answer. I still have no idea where I write the callback function and what I'll be doing with that in JS.
Thanks so much for any help you can give on this.
First set your bookmarklet with a link you can drop on the bookmark bar:
<html>
<head></head>
<body>
load
</body>
</html>
Replace the url by your script, it will be loaded and running on the host page.
However it sits now in the hosted page, and can't call your server with XMLHTTPRequest as the domains do not match.
Here comes JSONP.
In the loaded script, you can put a function eg: function srvCallback(json){...}
When you want to call your server you will inject it as a script using a similar function as in the bookmarklet above:
function jsonp(src){
var s = document.createElement('script');
old = document.getElementById('srvCall');
old && document.body.removeChild(old);
s.charset = 'UTF-8';
s.id = 'srvCall';
document.body.insertBefore(s, document.body.firstChild);
s.src = src + '?' + new Date().getTime();
}
Inject your request, eg:
jsonp('http://domain.com/controller/method/word')
The server should respond something like:
srvCallback({word:'hello'});
And finally the function srvCallback is automatically called, inside the function you get your JSON and show the result to the user.
Very simple Ajax request taking employee id and returning the user info as HTML dumb.
Request ajax("employee/info?emp_id=3543")
Response id = 3543name = some name
This is just another simple JS trick to populate the UI. However i do not understand how something like below is equally able to execute correctly and dump the HTML code.
<script type="text/javascript" src="employee/info?emp_id=3543" />
When page encounters following code it executes like the ajax request is executed and dumps code into page. Only difference is its no more asynchronous as in case of Ajax.
Questions :
Is this correct approach ? its +ves and -ves.
Which are the correct scenarious to user it?
Is this also means that any HTML tag taking "src" tag can be used like this?
I have used this kind of javascript loading for cross domain scripting. Where it is very useful. Here is an example to show what I mean.
[Keep in mind, that JS does not allow cross domain calls from javascript; due to inbuilt security restrictions]
On domain www.xyz.com there lies a service that give me a list of users which can be accessed from http://xyz.com/users/list?age=20
It returns a json, with a wrapping method like following
JSON:
{username:"user1", age:21}
If I request this json wrapped in a method like as follows:
callMyMethod({username:"user1", age:21})
Then this is a wrapped json which if loads on my page; will try to invoke a method called callMyMethod. This would be allowed in a <script src="source"> kind of declaration but would not be allowed otherwise.
So what I can do is as follows
<script language="javascript" src="http://xyz.com/users/list?age=20"></script>
<script language="javascript">
function callMyMethod(data)
{
//so something with the passed json as data variable.
}
</script>
This would allow me to stuff with JSON coming from other domain, which I wouldn't have been able to do otherwise. So; you see how I could achieve a cross domain scripting which would have been a tough nut to crack otherwise.
This is just one of the uses.
Other reasons why someone would do that is:
To version their JS files with
releases.
To uncache the js files so that they are loaded on client as soon as some changes happen to js and params being passed to URL will try to fetch the latest JS. This would enable new changes getting reflected on client immediatly.
When you want to generate conditional JS.
The usage you have specified in example wouldn't probably serve much purpose; would probably just delay the loading of page if processing by server takes time and instead a async ajax call would be much preferred.
Is this correct approach ? its +ves
and -ves.
Depends whether you want to use asynchronous (ajax) way or not. Nothing like +ve or -ve.
The later method takes more time though.
Which are the correct scenarious to
user it?
Ajax way is the correct method there in that sense.
Is this also means that any HTML tag
taking "src" tag can be used like
this?
src is used to specify the source path. That is what it is meant to do.