I have a Restlet application already working that accepts JSON and returns JSON entity as response.
I'm trying to understand how I can compress the JSON entity that is returned in the response.
I did not find any clear example on how to achieve it.
I think I have to put somewhere on the router chain the Encoder/EncoderService classes, but I really don't understand where and how to use them.
Could anybody help me?
After some testing, I got the answer.
Creating a new filter like this
Filter encoder = new Encoder(getContext(), false, true, new EncoderService(true));
inside the createInboundRoot() method of my own Application class did the trick, the client requests were already containing the gzip header needed.
Related
I am looking for either guidance or a good example where I can map data coming from rest services to JSON "type" object which can then be used in a number of different react components.
The JSON Object will be used to map data from a few different rest services, which essentially hold very similar data which makes it better to use one object and then to bind the data to the respective React Components.
I am fairly new to React.JS and I have googled around to find a data mapper to JSON from Rest Service example.
Can anyone help?
You typically don't have to do too much, at least on the front end side. As long as the REST endpoint can return JSON responses you'll be fine. Just make sure you set the appropriate Content-Type headers in the request. Note that setting the header doesn't guarantee a JSON response, the server has to be able to send it in that format.
If you're creating the REST service yourself, you have many options. If you're using node, you can simply return a javascript object. If you're using some other language like Java, C#, etc., they come with libraries that can serialize objects into JSON for you. I use JSON.net when working with C#. In these cases, because the data will be returned as a string, you'll just need to JSON.parse() it upon receiving it and then set it to the appropriate React component's state.
I use Alamofire to interact with the server API via JSON requests/responses. I want to make sure server responds with some strictly formed payload to my requests.
How do I check that, for example, in {"responseCode":15, "data":{"username":"maxpayne", "fullname":"Max Payne", "score":154, friends:["johndoe", "franksinatra"]}}, responseCode is a number, username and fullname are strings, and friends is an array of strings?
I can do it manually for each response, but seems like it's going to be the most worthless time waste.
Alamofire has .validate() method but it is created for different purpose as what I see. I also had a look at JSONSchemaSwift which seems to be a right solution, but is not in active development.
As an alternative, it could be good to have a JSON deserializer which validates a response automatically and creates an object based on a Swift class I define.
May be a bit late, but this came out kylef/JSONSchema.swiftcame out on github. It's a JSONSchema validator, simple and effective.
I'm brand new to Pentaho and I'm trying to do the following workflow:
read a bunch of lines out of a DB
do some transformations
POST them to a REST web service in JSON
I've got the first two figured out using an input step and the Json Output step.
However I have two problems doing the final step:
1) I can't get the JSON formatted how I want. It insists on doing {""=[{...}]} when I just want {...}. This isn't a big deal - I can work around this since I have control over the web service and I could relax the input requirements a bit. (Note: this page http://wiki.pentaho.com/display/EAI/JSON+output gives an example for the output I want by setting no. rows in a block=1 and an empty JSON block name, but it doesn't work as advertised.)
2) This is the critical one. I can't get the data to POST as JSON. It posts as key=value, where the key is the name I specify in the HTTP Post field name (on the 'Fields' tab) and the value is the encoded JSON. I just want to post the JSON as the request body. I've tried googling on this but can't find anyone else doing it, leading me to believe that I'm just approaching this wrong. Any pointers in the right direction?
Edit: I'm comfortable scripting (in Javascript or another language) but when I tried to use XmlHttpRequest in a custom javascript snippet I got an error that XmlHttpRequest is not defined.
Thanks!
This was trivial...just needed to use the REST Client (http://wiki.pentaho.com/display/EAI/Rest+Client) instead of the HTTP Post task. Somehow all my googling didn't discover that, so I'll leave this answer here in case someone else has the same problem as me.
You need to parse the JSON using a Modified JavaScript step. e.g. if the Output Value from the JSON Output is called result and its contents are {"data"=[{...}]}, you should call var plainJSON = JSON.stringify(JSON.parse(result).data[0]) to get the JSON.
In the HTTP Post step, the Request entity field should be plainJSON. Also, don't forget to add a header for Content-Type as application/json (you might have to add that as a constant)
Ok, this is my Nth question regarding this topic, and I'm getting really frustrated with Grails. Please have a quick look on one of my earlier questions for more details.
Among other things, my problem is that sending JSON formatted data to the controller when testing doesn't seem to work. The controller doesn't get null object, but the argument passed is practically empty--the JSON properties don't get set.
Aside from the controller code from the link above, I also tried,
def save() {
def model = new MyModel(request.JSON)
model.save()
}
but it still fails to set properties.
From my Web searches, I read that in older versions, parseRequest must be set to true in UrlMapping.groovy so that request data formatted in XML, JSON, etc. would automatically be parsed and passed as controller method argument. I'm working on Grails 2.3.9, and I'm not sure if it's still necessary to do that.
The time I thought I'd save if I use Grails on this project is being spent on looking for an answer to this seemingly simple task of testing a RESTful Web service.
No since 2.3.0 the parseRequest option doesn't do anything. The request is parsed lazily only when request.XML or request.JSON is accessed or when binding to a command object.
I am new to JSP and I am having trouble finding a simple concrete example to make a request to a server that returns a JSON object.
What I am trying to do is something like:
myjson_object = getJSONfrom("my.webserver.com/get/json")
I basically want to add such a line to an existing JSP page so that I can have the JSON object available. I would like to avoid using AJAX or JQuery. I have found several examples like this one, but for some reason they do not work in my case.
Probably trying to do that operation into JSP is not a good idea, since you'd need to use scriptlets and I understand scriptlets are now considered not a good practice (see this)... You'd better do it into a servlet (see this)...
Anyway the code would be similar. You first need to make the request and then parse the JSON response...
In order to make the request you can use HttpURLConnection class. See this question.
Once you have the server response into a BufferedReader, you can parse the JSON using some library, such as Gson. You can find lots of examples of JSON deserializing using Gson in SO, like this or this.