Urls Which return JSON object? - iphone

can anybody give me the urls which return the JSON objects or we can say application/json to end user?

http://codeasp.net/articles/asp-net/222/how-to-shorten-url-with-jquery
http://codeasp.net/articles/asp-net/217/calling-web-service-using-jquery-in-asp-net
http://codeasp.net/articles/asp-net/214/cascading-dropdownlist-using-jquery-and-asp-net
http://codeasp.net/articles/asp-net/212/using-jquery-autocomplete-in-asp-net

#Raman Rana try this
http://www.unpossible.com/misc/lucky_numbers.json
This will return some numbers and for more information follow the tutorial....
http://mobileorchard.com/tutorial-json-over-http-on-the-iphone/
Hope this may help u!

If you are referring to this question, it seems that Weather.com does not support JSON (from my Googling).
You may need to use a different service, or convert the XML to JSON, or just read the XML.
The mime type application/json is returned, not sent as part of the request.

Related

How to handle error responses in a REST endpoint that accepts different Accept header values.

I'm trying to add a new content type to a REST endpoint. Currently it only returns json but I now need to be able to return also a CSV file.
As far as I know, the best way to do this is by using the Accept header with value text/csv and then add a converter that is able to react to this and convert the returned body to the proper CSV representation.
I've been able to do this but then I have a problem handling exceptions. Up until know, all the errors returned are in json. The frontend expects any 500 status code to contain a specific body with the error. But now, by adding the option to return either application/json or text/csv to my endpoint, in case of an error, the converter to be used to transform the body is going to be either the jackson converter or my custom one depending on the Accept header passed. Moreover, my frontend is going to need to read the content-type returned and parse the value based on the type of representation returned.
Is this the normal approach to handle this situation?
A faster workaround would be to forget about the Accept header and include a url parameter indicating the format expected. Doing it this way, I'd be able to change the content-type of the response and the parsing of the data directly in the controller as the GET request won't include any Accept header and it will be able to accept anything. There are some parts of the code already doing this where the only expected response format is CSV so I'm going to have a difficult time defending the use of the Accept header unless there is a better way of handling this.
my frontend is going to need to read the content-type returned and parse the value based on the type of representation returned.
Is this the normal approach to handle this situation?
Yes.
For example, RFC 7807 describes a common format for describing problems. So the server would send an application/problem+json or an application/problem+xml representation of the issue in the response, along with the usual meta data in the headers.
Consumers that understand application/problem+json can parse the data with in, and forward a useful description of the problem to the user/logs whatever. Consumers that don't understand that representation are limited to acting on the information in the headers.
A faster workaround would be to forget about the Accept header and include a url parameter indicating the format expected.
That's also fine -- more precisely, you can have a different resource responsible for the each of the different media-types that you support.
It may be useful to review section 3.4 of RFC 7231, which describes the semantics of content negotiation.

How to design REST API for export endpoint?

I am designing a REST API and am running into a design issue. I have alerts that I'd like the user to be able to export to one of a handful of file formats. So we're already getting into actions/commands with export, which feels like RPC and not REST.
Moreover, I don't want to assume a default file format. Instead, I'd like to require it to be provided. I don't know how to design the API to do that, and I also don't know what response code to return if the required parameter isn't provided.
So here's my first crack at it:
POST /api/alerts/export?format=csv
OR
POST /api/alerts/export/csv
Is this endpoint set up the way you would? And is it set up in the right way to require the file format? And if the required file format isn't provided, what's the correct status code to return?
Thanks.
In fact you should consider HTTP content negotiation (or CONNEG) to do this. This leverages the Accept header (see the HTTP specification: http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.1) that specifies which is the expected media type for the response.
For example, for CSV, you could have something like that:
GET /api/alerts
Accept: text/csv
If you want to specify additional hints (file name, ...), the server could return the Content-Disposition header (see the HTTP specification: http://www.w3.org/Protocols/rfc2616/rfc2616-sec19.html#sec19.5.1) in the response, as described below:
GET /api/alerts
Accept: text/csv
HTTP/1.1 200 OK
Content-Disposition: attachment; filename="alerts.csv"
(...)
Hope it helps you,
Thierry

Get form parameters from a post request using spray/scala

I'm really new with all this Scala/Spray. With some testing I was able to get parameters from a Get request using the parameters function. However I'm trying to fetch some parameters sent from a POST request on the body of the request. It seems like parameters function is unable to fetch those values.
As an example, I'm trying to get this values "name=john&lastname=smith" from the post request body. What is the best option to get these values?
Thank you
You could use [Form-Field-Filters] to extract parameters from POSTs
[Form-Field-Filters] https://github.com/spray/spray/wiki/Form-Field-Filters
Indeed, the parameters directive only handles things actually in the query-string and not parameters in the body of the request. To get things out of the body, you'll need to use the content directive and then unmarshal the content.
This spray-user thread may be helpful, as it includes some unmarshalling code doing precisely what you're looking for.
As of recent Spray versions, you need to use the Unmarshaller for FormData.

JAX-RS/Jersey client: unmarshall URI encoded name/value pairs

I wondered if anyone knows how best to unmarshall a response from a JAX-RS/Jersey client that is returning a response from paypal. The response is URI encoded in name/value pairs. I ask because I've already written some code that unmarshalls a google geocode response, given a class hierarchy it automagically transforms the JSON response into objects, but alas I've not been able to do similar with this simpler problem.
TIMESTAMP=2011%2d06%2d03T13%3a22%3a17Z&CORRELATIONID=f708c43c1d078&ACK=Success&VERSION=56%
Thanks for any help.
You're going to need to do something like this: Parsing query strings on Android.

iPhone json parsing problem

When I try to parse ( http://www.roundmenu.com/webservices/index.cfm?ws=listrst&filter=featured ) webservice in json I encounter issues.
If any one can find out what the problem please let me know.
thanks in advance.
That’s not valid JSON. As usual, it’s useful to validate JSON input via http://jsonlint.com.
That particular JSON input fails to properly escape double quotes (\") inside strings.
Put the response in a json formatter like this one on curiousconcept.com. It yields many errors, does look like it's invalid json.