My question may first of all seem to have a duplicate but i have hit something that has suprised me. Yaws Webserver comes with a complete set SOAP example, but when i tried running it as is, this is what i get:
In text form, this is what i see in the shell:
1> inets:start().
ok
2> yaws_soap_lib:call("http://www.webservicex.net/WeatherForecast.asmx?WSDL","GetWeatherByPlaceName",["Boston"]).
=ERROR REPORT==== 15-Apr-2013::20:32:11 ===
Call to tuple fun {erlsom_parse,xml2StructCallback}.
Tuple funs are deprecated and will be removed in R16. Use "fun M:F/A" instead, for example "fun erlsom_parse:xml2StructCallback/2".
(This warning will only be shown the first time a tuple fun is called.)
{error,{decoding,"Malformed: Illegal character in prolog"}}
3> yaws_soap_lib:call("http://www.webservicex.net/WeatherForecast.asmx?WSDL","GetWeatherByPlaceName",["Boston"]).
{error,{decoding,"Malformed: Illegal character in prolog"}}
4>
You could try the yaws example following this page.
Another problem, is that i have tried other SOAP libraries like detergent and erlsoap and they are either too old or completely un-usable. Most of the solutions, even yaws, mentions his dependency on erlsom i pretty think for the XML parsing. But, i can hardly use erlsom single-handedly to offer soap services.
Somebody provide some information on how i can work with soap services (both a sa client and server) in erlang, and please explain the error i am getting with yaws. I am using the latest yaws version and erlang 15B.
This is an ugly hack, but here's how I deal with SOAP requests:
Write a function/module that wraps the following:
Set up some request templates (static XMLs) and fill them up with erlydtl
Make a HTTP POST request (using your client of choice) with SoapAction header set.
Take off the important stuff from the response using erlsom
From the official documentation we can read the following:
Tuple funs (a two-element tuple with a module name and a function) are
now officially deprecated and will be removed in R16. Use 'fun M:F/A'
instead.
So, Yaws should be updated. As a workaround, you have at least two options:
the Detergent library
Or, if you don't mind using the (not so) older Erlang R15, I believe it should work, as other users reported.
Related
I'm working on a php based site and integrating some facebook sdk into it to get some basic user information. One thing I've been running into is, when I make a request to the graph, how do I know if I should be using getGraphObject or getGraphEdge? I'm not seeing anything intuitive yet to tell me that.
I'm running the php-sdk4 -> version 5
Here's one example that I ran into last night..
$response = $fb->get('/me/friends', $fbToken);
$fbfriends = $response->getGraphEdge()->asArray();
In the documentation, if you look at the php example, they use getGraphObject. But when I use it, I get an error telling me I should probably use the Edge. There are a lot of "get" functions, but I don't see anything that tells me how to know what to use. getGraphObject, getGraphEdge, getGraphUser, etc. I'd love some insight into this one, because it's been a guessing game for me.
Basicly, when:
Getting /{node-id}, you should use getGraphNode() (getGraphObject() is deprecated)
Getting /{node-id-with-known-type}, you should use getGraph{Type}().
For example, getting /me then use getGraphUser(), getting /{event-id} then use getGraphEvent()
Getting /{node-id}/{edge-name}, you should use getGraphEdge() (getGraphList() is deprecated)
Getting /{node-id}/{edge-name-with-children-known-type}, you should use getGraphEdge({children-type-class}).
For example, getting /me/albums then use getGraphEdge('GraphAlbum')
Nodes class name are in Facebook\GraphNodes namespace.
I am currently trying to develop a web activity that a client would like to track via their Learning Management System. Their LMS uses the AICC standard (HACP binding), and they keep the actual learning objects on a separate content repository.
Right now I'm struggling with the types of communication between the LMS and the "course" given that they sit on two different servers. I'm able to retreive the sessionId and the aicc_url from the URL string when the course launches, and I can successfully post values to the aicc_url on the LMS.
The difficulty is that I can not read and parse the return response from the LMS (which is formatted as plain text). AICC stipulates that the course start with posting a "getParam" command to the aicc_url with the session id in order to retrieve information like completion status, bookmarking information from previous sessions, user ID information, etc, all of which I need.
I have tried three different approaches so far:
1 - I started with using jQuery (1.7) and AJAX, which is how I would typically go about a same-server implementation. This returned a "no transport" error on the XMLHttpRequest. After some forum reading, I tried making sure that the ajax call's crossdomain property was set to true, as well as a recommendation to insert $.support.cors = true above the ajax call, neither of which helped.
2 & 3 - I tried using an oldschool frameset with a form in a bottom frame which would submit and refresh with the returned text from the LMS and then reading that via javascript; and then a variation upon that using an iFrame as a target of an actual form with an onload handler to read and parse the contents. Both of these approaches worked in a same-server environment, but fail in the cross-domain environment.
I'm told that all the other courses running off the content repository bookmark as well as track completion, so obviously it is possible to read the return values from the LMS somehow; AICC is pitched frequently as working in cross-server scenarios, so I'm thinking there must be a frequently-used method to doing this in the AICC structure that I am overlooking. My forum searches so far haven't turned up anything that's gotten me much further, so if anyone has any experience in cross-domain AICC implementations I could certainly use recommendations!
The only idea I have left is to try setting up a PHP "relay" form on the same server as the course, and having the front-end page send values to that, and using the PHP to submit those to the LMS, and relay the return text from the LMS to the front-end iframe or ajax call so that it would be perceived as being within the same domain.... I'm not sure if there's a way to solve the issue without going server-side. It seems likely there must be a common solution to this within AICC.
Thanks in advance!
Edits and updates:
For anyone encountering similar problems, I found a few resources that may help explain the problem as well as some alternate solutions.
The first is specific to Plateau, a big player in the LMS industry that was acquired by Successfactors. It's some documentation that provide on setting up a proxy to handle cross-domain content:
http://content.plateausystems.com/ContentIntegration/content/support_files/Cross-domain_Proxlet_Installation.pdf
The second I found was a slide presentation from Successfactors that highlights the challenge of cross-domain content, and illustrates so back-end ideas for resolving it; including the use of reverse proxies. The relevant parts start around slide 21-22 (page 11 in the PDF).
http://www.successfactors.com/static/docs/successconnect/sf/successfactors-content-integration-turley.pdf
Hope that helps anyone else out there trying to resolve the same issues!
The answer in this post may lead you in the right direction:
Best Practice: Legitimate Cross-Site Scripting
I think you are on the right track with setting up a PHP "relay." I think this is similar to choice #1 in the answer from the other post and seems to make most sense with what you described in your question.
When using sinatra-r18n to handle internationalisation, the r18n lib exposes a variable t for use within your helpers, routes and templates, as per these instructions.
I have written a simple unit test using rack-unit to confirm that some of my pluralisations work but the test throws an error claiming t is nil.
I've tried referencing it via app.t, MySillyApp.t (where MySillyApp is the name of my Sinatra app), MySillyApp.settings.t etc and none of them give me access to the t I need.
What I am trying to achieve is a confirmation that my translation files include all the keys I need corresponding to plurals of various metric units my app needs to understand. Perhaps there is a more direct way of testing this without going via the Sinatra app itself. I'd welcome any insight here.
I had similar task to check localized strings in my Cucumber scenarios.
I've made working example.
Here you can find how strings got translated.
This file halps to understand how to add R18n support to your testing framework:
require 'r18n-core'
...
class SinCucR18nWorld
...
include R18n::Helpers
end
As you can see instead of rack/unit I'm using RSpec/Cucumber, sorry.
I have an ASP.net web service that I'm using for a web application which returns a either XML or JSON data to me, depending on the function I call. This has been working well thus far, but I've run into a problem. I want to create an "export" link on my page that will download a JSON file. The link is formatted very simply:
Export This Item
As you might imagine, this should export item 2. So far so good, yes?
Problem is that since I'm not specifically requesting that the accepted content type is JSON, ASP.net absolutely refuses to send back anything but XML, which just isn't appropriate for this situation. The code is essentially as follows:
[WebMethod]
[ScriptMethod(ResponseFormat = ResponseFormat.Json)]
public Item ExportItem(int itemId)
{
Context.Response.AddHeader("content-disposition", "attachment; filename=export.json"); //Makes it a download
return GetExportItem(itemId);
}
Despite my specifying the ResponseFormat as JSON, I always get back XML unless I request this method via AJAX (using Google Web Toolkit, BTW):
RequestBuilder builder = new RequestBuilder(RequestBuilder.POST, "mywebserviceaddress/ExportFunc");
builder.setHeader("Content-type","application/json; charset=utf-8");
builder.setHeader("Accepts","application/json");
builder.sendRequest("{\"itemId\":2}", new RequestCallback(){...});
That's great, but AJAX won't give me a download dialog. Is there any way to force ASP.net to give me back JSON, regardless of how the data is requested? It would seem to me that not having a manual override for this behavior is a gross design oversight.
QUICK ANSWER:
First off, let me say that I think that womp's answer is probably the better way to go long term (Convert to WCF), but deostroll led me to the answer that I'll be using for the immediate future. Also, it should be noted that this seems to work primarily because I wanted just a download, may not work as well in all situations. In any case, here's the code that I ended up using to get the result I wanted:
[WebMethod]
[ScriptMethod(ResponseFormat = ResponseFormat.Json)]
public void ExportItem(int itemId)
{
Item item = GetExportItem(itemId);
JavaScriptSerializer js = new JavaScriptSerializer();
string str = js.Serialize(item);
Context.Response.Clear();
Context.Response.ContentType = "application/json";
Context.Response.AddHeader("content-disposition", "attachment; filename=export.json");
Context.Response.AddHeader("content-length", str.Length.ToString());
Context.Response.Flush();
Context.Response.Write(str);
}
Please note the return type of void (which means that your WDSL will be next to useless for this function). Returning anything will screw up the response that is being hand-built.
Asp.net web services are SOAP-based web services. They'll always return XML. The Ajax libraries came along and the ScriptMethod stuff was introduced, but it doesn't change the underlying concept of it.
There's a couple things you can do.
WebMethods are borderline obsolete with the introduction of WCF. You might consider migrating your web services to WCF, in which you'll have much greater control over the output format.
If you don't want to do that, you can manually serialize the result of your webservice calls into JSON, and the service will wrap that in a SOAP header. You would then need to strip out the SOAP stuff.
Here are two forums threads for your reference:
http://forums.asp.net/t/1118828.aspx
http://forums.asp.net/p/1054378/2338982.aspx#2338982
I have no clear idea. They say on concentrating on setting the content type to application/json. I haven't worked with wcf before, but I think you can make use of the Response object.
Set the content type on the response object. Do a response.write passing your json data as string and then do a response.end.
Just thought I'd throw this out there since it wasn't mentioned previously... if you use WebServices with ASP.NET 3.5, JSON is the default return format. It also comes along with JSON serializer so you can stop using the JavascriptSerializer.
This article on Rick Strahl's blog talks about the strongly-typed conversion you can do between server side classes and JSON objects from the client.
I've recently completed a project using this new JSON stuff in .NET 3.5, and I'm extremely impressed with the performance. Maybe it's worth a look...
I would like to fetch a source of file and wrap it within JSONP.
For example, I want to retrieve pets.txt as text from a host I don't own. I want to do that by using nothing but client-side JavaScript.
I'm looking for online service which can convert anything to JSONP.
YQL
Yahoo Query Language is one of them.
http://query.yahooapis.com/v1/public/yql?q=select%20*%20from%20html%20where%20url%3D"http://elv1s.ru/x/pets.txt"&format=json&callback=grab
This works if URL is not blocked by robots.txt. YQL have respect to robots.txt. I can't fetch http://userscripts.org/scripts/source/62706.user.js because it blocked via robots.txt.
http://query.yahooapis.com/v1/public/yql?q=select%20*%20from%20html%20where%20url%3D"http://userscripts.org/scripts/source/62706.user.js"&format=json&callback=grab
"forbidden":"robots.txt for the domain disallows crawling for url: http://userscripts.org/scripts/source/62706.user.js"
So I'm looking for another solutions.
I built jsonpwrapper.com.
It's unstable and slower than YQL, but it doesn't care about robots.txt.
Here's another one, much faster, built on DigitalOcean & CloudFlare, utilizing caching et al: http://json2jsonp.com
Nononono. No. Just please; no. That is not JSONP, it is javascript that executes a function with an object as its parameter that contains more javascript. Aaah!
This is JSON because it's just one object:
{
'one': 1,
'two': 2,
'three':3
}
This is JSONP because it's just one object passed through a function; if you go to http://somesite/get_some_object?jsonp=grab, the server will return:
grab({
'one': 1,
'two': 2,
'three':3
});
This is not JSON at all. It's just Javascript:
alert("hello");
And this? Javascript code stored inside a string (ouch!) inside an object passed to a function that should evaluate the string (but it might or might not):
grab({"body": "alert(\"Hello!\");\n"});
Look at all those semicolons and backslashes! I get nightmares from this kind of stuff. It's like a badly written Lisp macro because it's much more complicated than it needs to (and should!) be. Instead, define a function called grab in your code:
function grab(message) {
alert(message.body);
}
and then use JSONP to have the server return:
grab({body: "Hello!"});
Don't let the server decide how to run your web page Instead, let your web page decide how to run the web page and just have the server fill in the blanks.
As for an online service that does this? I don't know of any, sorry
I'm not sure what you're trying to do here, but nobody will use something like this. Nobody is going to trust your service to always execute as it should and output expected JavaScript code. You see Yahoo doing it because people trust Yahoo, but they will not trust you.