The scenario is as follows:
A WCF web service exists that outputs a valid GeoRSS feed. This lives in its own domain as a number of different applications have access to it.
A web page(on a different site) has been created with an instance of a VEMap(Bing/Virtual Earth map object).
Now, VEMap can accept an input feed in this format via the following:
var layer = new VEShapeLayer();
var veLayerSpec = new VEShapeSourceSpecification(VEDataType.GeoRSS, "someurl", layer);
map.ImportShapeLayerData(veLayerSpec, onComplete, true);
onComplete is a callback function I'm using to replace the default pin graphic with something custom.
The question is in regards to "someurl", which is a path to a local xml file containing the geographic information(georss simple format). I've realized this feed and the map must be hosted in the same domain, so I've created a generic handler that reads the remote feed and returns it in the same format.
var veLayerSpec = new VEShapeSourceSpecification(VEDataType.GeoRSS, "/somelocalhandler.ashx", layer);
When I do this, I get the VEMap error("z is null"). This is the same error one would receive when trying to access a remote feed. When I copy the feed into a local xml file(ie, "feed.xml") there is no error.
The order of operations is currently: remote feed -> local handler -> VEMap import
If I'm over complicating this procedure, let me know! I'm a bit new to the Bing Maps API and might have missed something. Any assistance is appreciated.
The format I have above is actually very close to what I needed. A similar solution was found by Mike McDougall. Although I was passing the RSS feed directly through the handler(writing the read stream directly), I just needed to specify the following from within the handler:
context.Response.ContentType = "text/xml";
context.Response.ContentEncoding = System.Text.Encoding.UTF8;
With the above fix, I'm able to have a remote GeoRSS feed successfully load a separately hosted Virtual Earth map instance.
Related
I’m currently using DataTables.js with server-site data source written on PHP.
The server-side script gives out the data exactly as required by datatables:
{“iTotalDisplayRecords”:”777”,”sEcho”:0,”aaData”:[[row1],[row2],[row3]]}
Now I would like to add an additional security layer with encrypting the response from the server and decrypting it after it is received by datatables.
I need this as I noticed some of the clients work through HTTPS proxy and the content of some rows get mistakenly blocked.
I’m using this solution for server-side PHP script to give out encrypted content using openssl_encrypt.
Then at client side I have:
function datatable_init (source) {
$.getJSON(source, function(data) {
decryptedContent = JSON.parse(CryptoJSAesDecrypt(“password”, data));
oTable = $(‘dtable’).dataTable({
“bProccesing”: false,
“bServerSide: true,
//“sAjaxSource”: source,
“data”: decryptedContent
...
});
I had to replace ”sAjaxSource” to ”data” as it is different datasource type now which requires different type of datatable JSON format:
{data:[[row1],[row2],[row3]}
and I can’t to pass iTotalDisplayRecords anymore.
Is there a way I can keep feeding server-side format of JSON to datatable but feed it as a local JS object/array?
P.S. Another idea I had is to encrypt/decrypt each individual row of the table but that’s probably going to be more complicated and slower
The ajax.dataSrc option seems to be helpful, because it provides the possibility to modify the data received via ajax and thus allows you to define a function which takes care of decrypting the received data again. Especially the last example given on the reference page looks promising in my opinion.
When I create a share link in the UI with the "Anyone with this link can view this item" option, I get a URL that looks like https://onedrive.live.com/redir?resid=XXX!YYYY&authkey=!ZZZZZ&ithint=<contentType>. What I can't figure out is how to use this URL from code to download the content of the file. Hitting the link gives HTML for a page to show the file.
How can I construct a call to download the file? Also, is there a way to construct a call to get some (XML/JSON) metadata about the file, and maybe even a preview or something? I want to be able to do this all without prompting a user for credentials, and all the API docs are about how to make authenticated calls. I want to make anonymous calls to get publicly-shared files.
Have a read over https://dev.onedrive.com - it documents how you can make a query to our service to get the metadata for an item, along with URLs that can be used to directly download the content.
Update with more details
Sorry, the documentation you need for your specific scenario is still in process (along with the associated SDK changes) so I'll give you an overview of how to do it.
There's a sibling to the /drives path called /shares which accepts a sharing URL (such as the one you have above) in an encoded format and allows you to get metadata for the item it represents. This does not require authentication provided the sharing URL has a valid authkey.
The encoding scheme for the id is u!<UrlSafeBase64EncodedUrl>, where <UrlSafeBase64EncodedUrl> follows the guidelines outlined here (trim the = characters from the end).
Here's a snippet that should give you an idea of the whole process:
string originalUrl = "https://onedrive.live.com/redir?resid=XXX!YYYY&authkey=!foo";
byte[] urlAsUtf8Bytes = Encoding.UTF8.GetBytes(originalUrl);
string utf8BytesAsBase64String = Convert.ToBase64String(urlAsUtf8Bytes);
string encodedUrl = "u!" + utf8BytesAsBase64String.TrimEnd('=').Replace('/', '_').Replace('+', '-');
string metadataUrl = "https://api.onedrive.com/v1.0/shares/" + encodedUrl + "/root";
From there you can append /content if you want to get the contents of the file, or you can start navigating through if the URL represents a folder (e.g. /children/childfile.txt)
I am creating the application which need to track all tweets from user who registered to my application, i tried to track those with streaming API , there are public API, user API , and site API,
in those API it just have an option to follow the user ID by add the comma separated user ID
https://dev.twitter.com/streaming/overview/request-parameters#follow
but i think it is not flexible, if there are a new user registered , i need to rebuild the HTTP request , and also if there are so many users try to listen this stream and query will be so long,
it will be
https://stream.twitter.com/1.1/statuses/filter.json?follow=[user1],[user2],[user3]........[userN],
i afraid the query wont fit, i just need a parameter to filter all user who registered in my application such as, for example.
https://stream.twitter.com/1.1/statuses/filter.json?application=[applicationID]
but i think twitter dev does not provide it
so, is there any way to filter stream by application ID?
I didn't see anything like tracking by application id. If your query become too complex (too many follows/keywords), public streaming api will reject it,
and you can't open more than 2 connections with user stream. So, last solution is using Site Stream, -> you can open as many user connections as you have users registered to your app.
BUT the docs says :
"Site Streams is currently in a closed beta. Applications are no
longer being accepted."
Contact twitter to be sure
Arstechnica has a very interesting article about it. Take a look at this code and the link in the end of this post
If you are using python pycurl will do the job. Its provides a way to execute a function for every little piece of data received.
import pycurl, json
STREAM_URL = "http://chirpstream.twitter.com/2b/user.json"
USER = "YOUR_USERNAME"
PASS = "XXXXXXXXX"
userlist = ['user1',...,'userN']
def on_receive(self, data):
self.buffer += data
if data.endswith("rn") and self.buffer.strip():
content = json.loads(self.buffer)
self.buffer = ""
if "text" in content and content['user'] in userlist:
#do stuff
conn = pycurl.Curl()
conn.setopt(pycurl.USERPWD, "%s:%s" % (USER, PASS))
conn.setopt(pycurl.URL, STREAM_URL)
conn.setopt(pycurl.WRITEFUNCTION, on_receive)
conn.perform()
You can find more information here Real time twitter stream api
I have a Grid, a Store and Model for its data and AJAX proxy for the Store that is pointing to my self-written PHP back-end. The PHP backend writes to log each time it is called.
The system works OK for Read, Update and Delete calls. However now I need to add new field to Store, which I do in such a way:
(here, some new data were generated...)
var newEntry=Ext.ModelManager.create({
id:id,
title: title,
url: '/php/'+fname,
minithumb: '/php/'+small,
thumb:'/php/'+thumb
}, 'MyApp.model.fileListModel');
var store=Ext.getCmp('currGallery').getStore();
store.add(newEntry);
store.sync();
I have the new line appearing in the Grid.
But with or withour sync() call, I have no calls going to my PHP back end. It however reads one more time. Store has parameter autoSync :true and does great updating data automatically when I edit existing line in the Grid.
What am I missing?
Try not to set id when creating new record.
In fact I was missing a
newEntry.phantom = true;
flag. After I set it before adding to store, Store and its Proxy started to send data to server.
Maybe ID solution also works, dunno.
Can Flash be used together with SQL? I have a Flash form and I need to connect it to SQL. If there is any example on the net about this topic. I can't find it.
You don't use ActionScript directly with an SQL database. Instead you make http requests from ActionScript to a server, specifying the correct parameters. A typical opensource setup, is a PHP script communicating with a MySQL DB, but you can use Java with Oracle, Ruby with CouchDB, .NET with SQL or any other possible configuration. The important point is that you must be able to call a server script and pass variables... typically a Restful setup.
Once your PHP script has been properly configured, you can use http POST or http GET to send values from ActionScript.
PHP:
<?php
$updateValue = $_POST["updateValue"];
$dbResult = updateDB( $updateValue ); //This should return the db response
echo( $dbResult );
?>
To call this script from ActionScript, you need to create a variables object.
var variables:URLVariables = new URLVariables();
variables.updateValue = "someResult";
The variable name .updateValue, must match the php variable exactly.
now create a URLRequest Object, specifying the location of your script. For this example the method must be set to POST. You add the variable above to the data setter of the request.
var request:URLRequest = new URLRequest( "yourScript.php" );
request.method = URLRequestMethod.POST;
request.data = variables;
Now create a URLLoader and add an event listener. Do not pass the request created above to the constructor, but to the load method.
var loader:URLLoader = new URLLoader();
loader.addEventListener(Event.COMPLETE, onComplete );
loader.load( request );
The handler would look something like this.
private function onComplete( e:Event ) : void
{
trace( URLLoader( e.target ).data.toString() );
}
This example shows how to update and receive a response from a server / db combo. However, you can also query a DB through the script and parse the result. So in the PHP example above, you can output JSON, XML or even a piped string, and this can be consumed by ActionScript.
XML is a popular choice, as ActionScript's e4x support treats XML like a native object.
To treat the response above like an XML response, use the following in the onComplete handler.
private function onComplete( e:Event ) : void
{
var result:XML = XML( URLLoader( e.target ).data );
}
This will throw an error if your xml is poorly formed, so ensure the server script always prints out valid XML, even if there is a DB error.
The problem with this is giving someone a flash file that directly accesses SQL server is very insecure. Even if it's possible, which I have seen SOCKET classes out there to do so for MySQL (though never used it), allowing users to remotely connect to your DB is insecure as the user can sniff the login information.
In my opinion, the best way to do this is to create a Client/Server script. You can easily do this with PHP or ASP.net by using SendAndLoad to send the data you need to pass to SQL via POST fields. You can then send back the values in PHP with:
echo 'success='.+urlencode(data);
With this, flash can access the data via the success field.
I don't personally code flash but I work with a company who develops KIOSK applications for dozens of tradeshow companies, and my job is to store the data, return it to them. This is the method we use. You can make it even cleaner by using actual web services such as SOAP, but this method gets the job done if its just you using it.
You should look into Zend Amf or even the Zend Framework for server side communication with Flash. As far as I know Zend Amf is the fastest way to communicate with PHP ( therefore your database ) also you can pass & return complex Objects from the client to the server and vice versa.
Consider this , for instance. You have a bunch of data in your database , you implement functions in ZF whereas this data is formatted and set as a group of Value Objects. From Flash , you query ZF , Zf queries the database , retrieve & formats your data, return your Value Objects as a JSON string ( for instance ). In Flash, you retrieve you JSON string , decode it and assign your Value Objects to whatever relevant classes you have.
There are plenty of tutorials out there regarding Flash communication with the Zend Framework.
Here's an example:
http://gotoandlearn.com/play.php?id=90