Develop Reference

Get URL of each video in SharePoint 2013 library with JavaScript

I need to get the URL of each video in a library with JavaScript (I don't know how many videos will be in the library). I also need to get specific information about each video, such as date created. How would I do this? I am using a Script Editor web part to execute the JavaScript.

You could use rest API to get the information you wanted.
/_api/web/lists/GetByTitle('library title')/files
/_api/web/GetFolderByServerRelativeUrl('/sites/dev/Doc')/Files
Get to know the SharePoint REST service

Rest call with the below url will get you what you looking for
/_api/web/lists/getbytitle('" + youlistname + "')/items?$select=*,FileRef/FileRef"

PHP HttpRequest to create a web page - how to handle long response times?

I am currently using javascript and XMLHttpRequest on a static html page to create a view of a record in Zotero. This works nicely except for one thing: The page html title.
I can of course also change the <title>...</title> tag, but if someone wants to post the view to for example facebook the static title on the web page will be shown there.
I can't think of any way to fix this with just a static page with javascript. I believe I need a dynamically created page from a server that does something similar to XMLHttpRequest.
For PHP there is HTTPRequest. Now to the problem. In the javascript version I can use asynchronous calls. With PHP I think I need synchronous calls. Is that something to worry about?
Is there perhaps some other way to handle this that I am not aware of?
UPDATE: It looks like those trying to answer are not at all familiar with Zotero. I should have been more clear. Zotero is a reference db located at http://zotero.org/. It has an API that can be used through XMLHttpRequest (which is what I said above).
Now I can not use that in my scenario which I described above. So I want to call the Zotero server from my server instead. (Through PHP or something else.)
(If you are not familiar with the concepts it might be hard to understand and answer the question. Of course.)
UPDATE 2: For those interested in how Facebook scraps an URL you post there, please test here: https://developers.facebook.com/tools/debug
As you can see by testing there no javascript is run.

Sorry, im not sure if i understand what you are trying to ask, are you just wanting to change the pages title?
Why not use javascript?
document.title = newTitle

Facebook expects the title (or opengraph :title tags) to be present when it fetches the page. It won't execyte any JavaScript for you to fill in the blanks.
A cool workaround would be to detect the Facebook scraper with PHP by parsing the User Agent string, and serving a version of the page with the information already filled in by PHP instead of JavaScript.
As far as I know, the Facebook scraper uses this header for User Agent: "facebookexternalhit/1.1 (+http://www.facebook.com/externalhit_uatext.php)"
You can check to see if part of that string is present in the header and load the page accordingly.
if (strpos($_SERVER['HTTP_USER_AGENT'], 'facebookexternalhit') !== false)
{
//synchronously load the title and opengraph tags here.
}
else
{
//load the page normally
}

How to catch a certain part of a website?

Suppose that we have a website. We want to show a specified part of this site in another site, like a table of data that shows latest news, and we want to show this part in our website with javascript.
Is this possible? Are there any more information needed?
We all know that with this code:
<iframe src="http://www.XYZ.com">
</iframe>
we can load all website, but how to load a specific part of a website?

I think your best bet is JQuery.load(), but I'm not up to speed on whether there are crossdomain problems with that approach. • Just checked and there are.
You can use PHP to load the output of a page with file_get_contents() or similar and then scrape out what you want for your own output.
Example:
$str = file_get_contents("http://ninemsn.com.au/");
// Reallly shouldn't use regex with HTML.
$region = '/(\<div id\=\"tabloid\_2\" class\=\"tabloids\">)(.*)(\<\/div\>)/';
preg_match($region, $str, $matches);
echo $matches[0];
Finally, something to keep in the back of your mind is that many of the larger websites that developers may want to get content from for their own website offer APIs to easily and efficiently obtain information from their site. YouTube, Twitter and a number of photo sharing sites are good examples of these. JSON and XML are probably the most common data formats that you will receive from these APIs.
Here are some examples of APIs that produce usable JSON:
YouTube video feed: https://gdata.youtube.com/feeds/api/users/Martyaced/uploads?alt=json
Twitter feed: http://api.twitter.com/1/statuses/user_timeline.json?screen_name=Martyaced

Google spreadsheet with hyperlinks via JSON

I'm using json-in-script to put content from a Google Spreadsheet on a web page. The spreadsheet has hyperlinks on some of the text in the cells. JSON doesn't seem to be getting anything other than the plain text of the spreadsheet, and no markup like hyperlinks. How do you get hyperlinks? Can you with JSON?
This is the src of what I'm importing:
http://spreadsheets.google.com/feeds/cells/0Aipg92XowKCndHhtbnZXQkllWEUzUjBEc3NkQXppdnc/1/public/values?alt=json-in-script&callback=cellEntries&min-row=2&min-col=1&max-col=7
This is the link to the spreadsheet (see how the items in col1 are linked?)
https://spreadsheets.google.com/spreadsheet/pub?hl=en_US&hl=en_US&key=0Aipg92XowKCndHhtbnZXQkllWEUzUjBEc3NkQXppdnc&output=html
Can anyone advise me how to get the hyperlinks?
Thanks!

You'll want to do some post-processing, checking if a value matches a URL. If it does, create your own tag for it.
Use one of these:
http://www.google.com/search?q=url+regex
Also, you know that you can embed Google Spreadsheets directly in a webpage? I'm guessing you're not doing this because it would use an iFrame, and what you want is the actual data?

Rather than using the Google Speadsheets API (which is quite cumbersome), you should use jsondata.com. It'll let you upload all the data from a .csv and embed it in your site with YouTube-style embed code.
The post processing is a piece of cake when you get your entire dataset to your application in a nicely formatted JSON object.

Cross Domain Javascript Bookmarklet

I've been at this for several days and searches including here haven't give me any solutions yet.
I am creating a Bookmarklet which is to interact with a POST API. I've gotten most of it working except the most important part; the sending of data from the iframe (I know horrible! If anyone knows a better solution please let me know) to the javascript on my domain (same domain as API so the communication with the API is no problem).
From the page the user clicks on the bookmarklet I need to get the following data to the javascript that is included in the iFrame.
var title = pageData[0].title;
var address = pageData[0].address;
var lastmodified = pageData[0].lastmodified;
var referralurl = pageData[0].referralurl;
I first fixed it with parsing this data as JSON and sending it through the name="" attribute of the iFrame but realized on about 20% of webpages this breaks. I get an access denied; also it's not a very pretty method.
Does anyone have anyidea on how I can solve this. I am not looking to use POSTS that redirect I want it all to be AJAX and as unobtrusive as possible. It's also worth noting I use the jQuery library.
Thank you very much,
Ice

You should look into easyXDM, it's very easy to use. Check out one of the examples on http://consumer.easyxdm.net/current/example/methods.html

After a lot of work I was able to find a solution using JSONP which is enables Cross Domain Javascript. It's very tricky with the Codeigniter Framework because passing data allong the URLs requires a lot of encoding and making sure you dont have illegal characters. Also I'm still looking to see how secure it really is.

If I understand your question correctly, you might have some success by looking into using a Script Tag proxy. This is the standard way to do cross domain AJAX in javascript frameworks like jquery and extjs.
See Jquery AJAX Documentation

If you need to pass data to the iframe, and the iframe is actually including another page, but that other page is on the same domain (a lot of assumptions, I know).
Then the man page code can do this:
DATA_FOR_IFRAME = ({'whatever': 'stuff'});
Then the code on the page included by the iframe can do this:
window.parent.DATA_FOR_IFRAME;
to get at the data :)