Hi, i have been having some problems using JSON data in flash builder lately and I was hoping someone could help me out here.
I have spent the past month working solidly on this issue, so I HAVE been looking around, HAVE been trying out everything I can find or think of. I am simply stuck.
I have been working on a flex mobile application for the Blackberry Playbook tablet with Adobe Flash Builder 4.6. It is a reddit app, designed to give users the main reddit feed, subreddits, search function, hopefully log in stuff etc. Of course I need the aid of the reddit API to access this information, of which the documentation can be found here: https://github.com/reddit/reddit/wiki/API/ The api uses either XML or JSON formatted data.
Now onto my problem- Like mentioned above, i want to display the reddit feed inside the app. I want to be able to use a item renderer to customize the data that is shown within each entry of the list.
One entry would consist of:
1) a thumbnail of the image in the post
2) The title of the post
3) a 'like/dislike' button, but this is unimportant at the moment.
Of course to start out, i placed a spark List component onto the design view. Then i configured a new HTTP data service using the Data/Services panel. I specified http://www.reddit.com/r/all.json for the url. I configured the return type, and the did a Test Operation. Everything connected just fine. All the data came through as normal. I will give you an idea of what the data comes back as so that you may understand my issue later on.
Test Operation Results (json data structure):
NoName1
data
after
before
children
[0]
data
media_embed
score
id
title
thumbnail
url
(etc etc...)
kind
[1]
data
media_embed
score
title
thumbnail
(etc etc...)
kind
[2] (array continues)
modhash
kind
As you can see, to get to the thumnail for example, you would have to go through data.children[].data.thumnail. When I tried to bind this data to the spark List component, I specified the data service to be from the one above. Then I specified the Data provider option to be Children[], as this value is typically set to the array. Now this is where the trouble begins. The final option, Label Field, only gave me one value to choose from: 'kind'. So as you can tell, it wasnt expecting the data to go any further nested. It stops at the two value just within each array item, which would be Data and Kind, though it only offers me Kind. I need to go one level further to access Title and Thumbnail. This is my problem.
Now, I have analyzed the code for the binding, and I have tried altering it to accomodate the further nested value. No success what so ever. The following is the code that the binding generates:
<s:List
id="myList" width="100%" height="100%" change="myList_changeHandler(event)"
creationComplete="myList_creationCompleteHandler(event)" labelField="kind">
<s:AsyncListViewlist="{TypeUtility.convertToCollectionredditFeedJSONResult.lastResult.data.children)}"/>
<s:List>
Obviously i would want to have something like along the lines of:
"TypeUtility.convertToCollection(redditFeedJSONResult.lastResult.data.children.data" and then set the labelField="title" or "thumbnail".
I certainly hope someone can help me with this. I am out of my mind as to what to do. If you need any further clarification I would be happy to provide it. I tried to explain the situation above as clearly as possible. Thank you so much.
Ted
I have this situation often: get an XML or JSON data from the server, then trying to use it as a dataProvider for a spark.components.List or for a mx.controls.Menu and then they just wouldn't display the data as I want them, because something in the data is different from what they expect. And then they display wrong XML-children or [Object,Object,etc.]
And in such cases I just create an empty ArrayCollection() which serves as dataProvider instead (and can be sorted and/or filtered too). And when data comes from the server, I push() new Objects into it:
[Bindable]
private var _data:ArrayCollection = new ArrayCollection();
public function update(xlist:XMLList):void {
_data.length = 0;
for each (var xml:XML in xlist)
_data.push({label: xml, event: xml.#event});
}
This always works. And if you get your next problem - flickering of the List, then that is solvable by merging data too.
Good luck with your Playbook development, which is a cool piece of hardware :-)
Related
guys! I'm looking for a solution or some ideas on how to solve my task.
There is a video surveillance camera(vendor: Hikvision) with an accessible web-interface.
In the web-interface, there is a field Device Name containing data I need to retrieve by means of the Zabbix server and further to use this data for renaming discovered hosts.
Since Hikvision cameras support SNMP, I've tried the SNMP agent in Zabbix. I turned out that Hikvision MIB doesn't contain data from that field.
Also exploring web-interface through Developer tools in Google Chrome I stumbled upon the string Request URL: http://10.90.187.16/ISAPI/System/deviceInfo which gives such response in XML format:
<DeviceInfo xmlns="http://www.hikvision.com/ver20/XMLSchema" version="2.0">
<deviceName>1.5.1.1</deviceName>
<deviceID>566eec0b-6580-11b3-81a1-1868cb48861f</deviceID>
<deviceDescription>IPCamera</deviceDescription>
<deviceLocation>hangzhou</deviceLocation>
<systemContact>Hikvision.China</systemContact>
<model>DS-2CD2155FWD-IS</model>
<serialNumber>DS-2CD2155FWD-IS20170417AAWR749464587</serialNumber>
<macAddress>18:68:cb:48:86:1f</macAddress>
<firmwareVersion>V5.4.5</firmwareVersion>
<firmwareReleasedDate>build 170124</firmwareReleasedDate>
<encoderVersion>V7.3</encoderVersion>
<encoderReleasedDate>build 170123</encoderReleasedDate>
<bootVersion>V1.3.4</bootVersion>
<bootReleasedDate>100316</bootReleasedDate>
<hardwareVersion>0x0</hardwareVersion>
<deviceType>IPCamera</deviceType>
<telecontrolID>88</telecontrolID>
<supportBeep>false</supportBeep>
<supportVideoLoss>false</supportVideoLoss>
</DeviceInfo>
Where the tag <deviceName>1.5.1.1</deviceName> contains required data and now the question is how to put two and two together by means of Zabbix.
Digging into Zabbix documentation I've found an article about creating an Item based on HTTP agent with XML request . Unfortunately there are not any exmaples how to do it exactly.
Has somebody had such experience? Any clues will be helpful
You can create an HTTP Agent item, set it to TEXT type and point it to http://10.90.187.16/ISAPI/System/deviceInfo (don't forget the authentication, if required!), Zabbix will retrieve the full XML.
To get the desired value you have to create a dependent item, point it to the previous item and set up a preprocessing step.
Create a single XML Xpath preprocessing rule with parameter string(/DeviceInfo/DeviceName) to get the 1.5.1.1 value
If you want to get the firmware version, create another dependent item and set up the XPath to string(/DeviceInfo/FirmwareVersion) and so on for every element you need.
If you want a single value you can use a single item, adding the preprocessing rule to the http agent item. I use my solution for flexibility, maybe one day I'll need another XML element or maybe a firmware update will add some element to the page.
Dependent items are more flexible, but of course the full XML uses more storage in the database for stuff you don't need right now: it's a tradeoff, either way works!
I'd like to have a list of just the current titles for all questions in one of the smaller (less than 10,000 questions) stackexchange site. I tried the interactive utility here: https://api.stackexchange.com/docs/questions and it both reports the result as a json at the bottom, and produces the requesting url at the top. For example:
https://api.stackexchange.com/2.2/questions?order=desc&sort=activity&tagged=apples&site=cooking
returns this JSON in my browser:
{"items":[{"tags":["apples","crumble"],"owner":{ ...
...
...],"has_more":true,"quota_max":300,"quota_remaining":252}
What is quota? It was 10,000 on one search on one site, but suddenly it's only 300 here.
I won't be doing this very often, what I'd like is the quickest way to edit that (or similar of course) url so I can get a list of all of the titles on a small site. I don't understand how to use paging, and I don't need any of the other fields. I don't care if I get them, but I'm thinking if I exclude them I can have more at once.
If I need to script it, python (2.7) is my preferred (only) language.
quota_max is the number of requests your application is allowed per day. 300 is the default for an unregistered application. This used to be mentioned directly on the page describing throttles, but seems to have been removed. Here is historical information describing the default.
To increase this to 10,000, you need to register an application and then authenticate by passing an access token in your script.
To get all titles on a site, you can use a Python library to help:
StackAPI. The answer below will use this library. DISCLAIMER: I wrote this library
Py-StackExchange
SEAPI
StackPy
Assuming you have registered your application and authenticated we can proceed.
First, install StackAPI (documentation):
pip install stackapi
This code will then grab the 10,000 most recent questions (max_pages * page_size) for the site hardwarerecs. Each page costs you one API hit, so the more items per page, the few API calls.
from stackapi import StackAPI
SITE = StackAPI('hardwarerecs')
SITE.page_size = 100
SITE.max_pages = 100
# Filter to only get question title and link
filter = '!BHMIbze0EQ*ved8LyoO6rNjkuLgHPR'
questions = SITE.fetch('questions', filter=filter)
In the questions variable is a dictionary that looks very similar to the API output, except that the library did all the paging for you. Your data is in questions['data'] and, in this case, contains a list of dictionaries that look like this:
[
...
{u'link': u'http://hardwarerecs.stackexchange.com/questions/29/sound-board-to-replace-a-gl2200-in-a-house-of-worship-foh-setting',
u'title': u'Sound board to replace a GL2200 in a house-of-worship FOH setting?'},
{ u'link': u'http://hardwarerecs.stackexchange.com/questions/31/passive-gps-tracker-logger',
u'title': u'Passive GPS tracker/logger'}
...
]
This result set is limited to only the title and the link because of the filter we applied. You can find the appropriate filter by adjusting what fields you want in the web UI and copying the filter field.
The hardwarerecs parameter that is passed when creating the SITE parameter is the first part of the site's domain URL. Alternatively, you can find it by looking at the api_site_parameter for your site when looking at the /sites end point.
I'm trying to fetch "current / max Players" from this site:
http://rust-servers.net/server/64099/
I would like to display just the player numbers, eg. "70 / 175" on another website and have it update every time someone visits my .html page (I can change that one to .php if needed.)
How would I go about doing that in the most simple and efficient way?
I've googled the issue for some hours without any luck, I'm no closer to understanding what I would want to use to do this as everyone seems to suggest widely different methods and most seem way too verbose for the simple thing I'm trying to do - many examples fetch the data as JSON (?) with some JS/jQuery (?) and use a bit of code to find specific items in that data, define it as a variable or array and then display it later.
I've figured that the information I want can be referred to using XPath "/html/body/div[4]/div/div/div[9]/div[1]/table/tbody/tr[4]/td[2]/strong" but that's about it. How do I proceed from there?
Thank you.
It depends on which platform do you want to use.
If you use C#, you can use HtmlAgilityPack library.
It is basically like this:
var webClient.DownloadString("http://rust-servers.net/server/64099/");
var doc = new HtmlAgilityPack.HtmlDocument();
doc.LoadHtml(htmlCode);
var node = doc.DocumentNode.SelectSingleNode("/html[1]/body[1]/div[4]/div[1]/div[1]/div[9]/div[1]/table[1]/tbody[1]/tr[4]/td[2]");
var nodeValue = node.InnerText;
I am working on a fairly simple Heat Map application where the longitude and latitude of the points will be stored in a SQL Server database. I have been looking at an example that uses an array of objects as follows (eliminated a lot of data for brevity):
/* Sample data to demonstrate Bing Maps Heatmap */
/* http://alastair.wordpress.com */
var CrimeData = [
new Microsoft.Maps.Location(52.67280, 0.94392),
new Microsoft.Maps.Location(52.62423, 1.29493),
new Microsoft.Maps.Location(52.62187, 1.29080),
new Microsoft.Maps.Location(52.58962, 1.72228),
new Microsoft.Maps.Location(52.69915, 0.24332),
new Microsoft.Maps.Location(52.51161, 0.99350),
new Microsoft.Maps.Location(52.59573, 1.17067),
new Microsoft.Maps.Location(52.94351, 0.49153),
new Microsoft.Maps.Location(52.64585, 1.73145),
new Microsoft.Maps.Location(52.75424, 1.30079),
new Microsoft.Maps.Location(52.63566, 1.27176),
new Microsoft.Maps.Location(52.63882, 1.23121)
];
What I want to do is present the user with a list of some sort that displays all the data sets that exist in the database (they each have a name associated with them) and then allow the user to check all or only a select few. I will then need to generate an array like the above to create the heat map. Any ideas on a good approach to this?
What you trying to achieve is more related to a web developement rather than only related to Bing Maps.
To summarize, you have multiple ways to do this but it really depends on what you are capable to do and what you need in the interface.
What process/technology?
First, you need to determine what process you want to follow to display the data and it will set the technology that you will use. The questions that you need to ask yourself are:
Do you want to be able to change the data sets dynamically without refreshing the whole page?
If yes, it means that you will have to use asynchronous data loading through a dedicated web service in order to avoid loading all the information at the initial load of the page.
Do you have lots of data to load?
If so, it might comfort you with asynchronous loading to avoid loading all data.
If not loading every elements in multiple arrays might be the simplest solution.
Implementation
So now, you want to create a web service to load the data asynchronously, you can take a look at the following websites :
http://www.asp.net/get-started
http://www.stefanprodan.com/2011/04/async-operations-with-jquery-ajax-and-asp-net-mvc/
There might be interesting other website, you will be able to find them. If needed, add comment and I'm sure the community will help you.
If you want to generate the data directly in the script, it could be simple as you can compose the JavaScript directly in your dynamically created HTML page (in your ASP.Net markup code or whatever technology you're using).
I am doing a HTML5 app. Everything works well. The client suddenly requested that he needs to change error messages and text labels as he wish after completing the code, but without touching the HTML5. So I got two solutions in to my mind.
1 Use javascript variables
// Error Messages
var msg_authentication_failed = "The username or password is invalid. Please try again";
and use this variable as I wanted.
2 Use XML file (Or JSON)
<?xml version="1.0" encoding="ISO-8859-1"?>
<ErrorMessages>
<AuthenticationFail>The username or password is invalid. Please try again</AuthenticationFail>
</ErrorMessages>
Load XML file and set values using it's tag names.
However I feel that the 2nd solution is easy to maintain by the client but performance wise it's not good.
Is there any other possible way to get done this kind of requirement? Appreciate your suggestions.
I'm running a jQuery Mobile project which supports around 6 languages (from Europe) and what I did was simply maintaining the labels in a JSON string.
using the event pagebeforeshow I update the labels when showing form element's labels. If it is an error message, I wrote a custom function that can access the string based on the labelID.
More than XML, JSON is extremely easy to handle. I would suggest you to go ahead with it.