I want an option like add comment in my forum to let the users post a quick reply.
Вован Путин -
I think you mean the 'Add Comment' option.
It's some AJAX stuff. That's how it works basically :
Some lines of
JavaScript calls a server-side
page, giving it some arguments, like
content of the comment, author, etc.
Server do some work, here it
certainly adds some rows in the
database, on the comments table..
Server give an answer to the client :
in PHP everything that is echoed is
returne to the client.
Client receive the answer, and
manipulate the page, usually via
the DOM, add the HTML that show
the comment, refresh some stuff,
etc.
See here for tutorial and overview of this technology.
Add comment is done using AJAX.
From wikipedia
Ajax, sometimes written as AJAX
(shorthand for asynchronous JavaScript
and XML), is a group of interrelated
web development techniques used on the
client-side to create interactive web
applications or rich Internet
applications. With Ajax, web
applications can retrieve data from
the server asynchronously in the
background without interfering with
the display and behavior of the
existing page. The use of Ajax has led
to an increase in interactive
animation on web pages1[2] and
better quality of Web services due to
the asynchronous mode. Data is usually
retrieved using the XMLHttpRequest
object. Despite the name, the use of
JavaScript and XML is not actually
required, nor do the requests need to
be asynchronous.[3]
It works via HTTP.
Related
I've been wondering how to fetch the PlayStation server status. They display it on this page:
https://status.playstation.com/en-us/
But PlayStation is known to use APIs instead of PHP database fetches. After looking around in the source code of the site, I found that they have a separate file called /data.json.
https://status.playstation.com/en-us/data.json
The content of this file is the same as the index file (for some reason). They use stuff like {{endDateTitle}} and {{message}}, but I can't find where it's defined, if it's pulled using a separate file or just pulled from a database using PHP.
How can I "reverse" this site and see if there's a API I can use to display the status on my site?
Maybe I did not get the question right, but it seems pretty straightforward.
If using firefox, open Developer tools, Network. Reload the page.
You can clearly see the requested URL
https://status.playstation.com/data/statuses/region/SCEA.json
It seems that an empty list as a status means "No problems" (since there are no problems I cannot verify this assumption. That's all
The parenthesis {{}} are used by various HTML templating languages, like angular, so you'd have to go through the js code to understand where they get updated.
I am doing IOT related project in Labview using Arudino as hardware.
I was able switch off/on an led on Arudino by Pressing OFF/ON on website by using datasocket vi. Now what i want is to control the intensity of led from Website.
I have a range slider in my website and its real time value can be viewed in textarea,div,input type.
Is there any way i can get that real time value that is being changed in HTML DOM in Labview.
I know that datasocket vi returns the html source code but not the HTML DOM.
I dont want to use the Web Publishing Services as they dont work in my Laptop.
This is the link im referring for datasocket.
Datasocket Labview
You can do something like creating a web socket, but I expect the easiest thing is to use a web service. You can create one in LV and add a setLEDIntensity method to it and call it from your JS code. You can find a simple example here and in other documents in that community.
Use WebSocket API for LabVIEW to send and receive data from the web. This is the best option for you.
https://decibel.ni.com/content/docs/DOC-40572
New to the JSON world and I'm trying to find out how to view a JSON object of a webpage. Will every webpage have a JSON object and if so how do I find it in order to get the data and display it on my site? I vaguely remember something about using Firebug?
Thanks,
B
Will every webpage have a JSON object
No.
Many web sites will not use any JSON; many will be completely static (HTML and CSS only).
It may only apply if there is a "Web API" (for programmatic access to content), but there are non-JSON ways to do APIs (the X in AJAX is for XML).
To determine how to access a site programmatically look at the site's developer documentation. If there isn't any documentation then any AJAX web debuggers (like FireBug) show may well be internal only and intended only for the site's own implementation; other uses could well be not welcome (you could be up for violating IP).
This might become a vulnerability to add sensitive JSON to your final HTML page.. JSON should be loaded like an ingredient to the soup, via Ajax for example on authenticated page. If it's not sensitive JSON then you should load it for performance reasons once it is required... it really depends on your choice. I have built a library to handle these kind of requests for web, check it out: https://github.com/alexmano/jsMan
I am at this website -
http://www.zoominfo.com/s/#!search/company/1.64.eyJjb21wYW55TmFtZSI6xIB2YWx1xIw6ImEiLCJpc1VzZWTEjXRyxJN9fQ%3D%3D
If you see the company name - Agilent Technologies Inc.
Its neither there in page source, nor in any json format.
But it does show in the Dom of Chrome Developer tool.
I have looked and analysed almost every requests that it sent, but still couldn't find where this data is saved.
By where the data is saved - I am looking to find where I can scrape that data from?
If by using python-requests and BeautifulSoup
I do see an XMLHTTPREQUEST made, not sure what that means, or if that is the clue to my answer.
I am still learning python, and it would be a very useful information if someone helps me with this.
Thanks in advance.
After the HTML is loaded, js requests for the data through an XMLHTTPREQUEST which is loaded right after the request is received on your client. That's why you see the DOM element right there using element inspector.
You didn't mention what goal you want to achieve or what tool you are using. Please be specific on your question. If you do not have any idea about this kind of pattern, google out angularjs, see some example.
do see an XMLHTTPREQUEST made, not sure what that means, or if that is the clue to my answer.
It means that javascript embedded in the page is sending an extra HHTP request to the web server. It is likely that the "Agilent Technologies Inc." text is being returned in the server's response to that request, and the javascript in the page is then injecting the text into the DOM in the appropriate place.
Where is the Data stored on Website
That is a completely different question ...
(You have already noted that the data (e.g. the company name) gets injected into the page displayed by your browser.)
On the server side, the data could be stored in the web server (or its back-end systems) in a variety of ways. Or it might not be stored at all. There is no way of knowing ... without looking at the server-side code and configurations.
I'm creating a wiki using Mediawiki for the first time. I would like to include automatically all backlinks of the current page in a template (like the "See also" section). I tried to play with the API, successfully, but I still haven't succeed in including the useful section of the result in my template.
I have been querying Google and Stackoverflow for days (maybe in the wrong way) but I'm still stuck.
Can somebody help me?
As far as I know, there is no reasonable way to do that. Probably the closest you could get is to write a JavaScript code that reacts on the presence of a specific HTML element in the page, makes the API request and then updates the HTML to include the result.
It’s not possible in wiki text to execute any JavaScript or use even more uncommon HTML. As such you won’t be able to use the MediaWiki API like that.
There are multiple different options you have to achieve something like this though:
You could use the API by including custom JavaScript code on MediaWiki:Common.js. The code there will be included automatically and can be used to enhance the wiki experience. This obviously requires JavaScript on the client so it might not be the best option; but at least you could use the API directly. You would have to add something to figure out where to place the results correctly though.
A better option would be to use an extension that gives you this output. You can either try to find an extension that already provides this functionality, or write your own that uses the internal MediaWiki API (not the JS one) to access that content.
One extension I could personally recommend you that does this (and many other things), is DynamicPageList (full disclosure: I’m somewhat affiliated with that project). It allows you to perform complex page selections.
For example what you are trying to do is to find all pages which link to your page. This can be easily done by DPL like this:
{{ #dpl: linksto = {{FULLPAGENAME}} }}
I wrote a blog post recently showing how to call the API to get the job queue size and display that inside of the wiki page. You can read about it at Display MediaWiki job queue size inside your wiki. This solution does require the External Data extension however. The code looks like:
{{#get_web_data: url={{SERVER}}{{SCRIPTPATH}}/api.php?action=query&meta=siteinfo&siprop=statistics&format=json
| format=JSON
| data=jobs=jobs}}
{{#external_value:jobs}}
You could easily swap in a different API call to get other data. For the specific item your looking for, #poke's answer above is probably better.