I'm working on a soon to be legacy Rails App and I need to consume a local endpoint.
What I need to do is something like this
controller A
response = restClient.call("some other local endpoint belong to controller B")
do some formatting on the response
return formatted response to client
What I'm doing now is using Faraday lib for rest call:
conn = Faraday.new(
url: 'http://127.0.0.1:3000',
params: orig_params,
headers: { 'Content-Type' => 'application/json' }
)
response = conn.post('/api/v2/points/adjust')
format_response(response)
Is there a better way of doing so? what I was aiming for is like in a controller test
POST/GET like methods that 'knows' how to reach the local endpoint...
conceptually something like:
response = post('/api/v2/points/adjust')
format_response(response)
And yes, its very bad design but that is the constraint(as I mentioned it's a soon to be legacy app) I need to live with and the only questions what would be the best way to do it.
Related
I have a Grails controller that receives a DefaultMultipartHttpServletRequest like so:
def myController() {
DefaultMultipartHttpServletRequest proxyRequest = (DefaultMultipartHttpServletRequest) request
}
This controller acts as a proxy by taking pieces of this request and then resends the request to another destination.
For non-multipart requests, this worked fine, I did something like:
IProxyService service = (IProxyService) clientFactory.create()
Response response = service.doPOST(proxyRequest.getRequestBody())
Where proxyRequest.getRequestBody() contains a JSON block containing the request payload.
However, I do not know how to get this to work with multipart request payload, since the request body is no longer a simple block of JSON, but something like the following (taken from Chrome devtools):
How can I can pass this request payload through using my proxy service above, where doPost takes a String?
Have you tried
def parameterValue = request.getParameter("parameterName")
to get the parameter value?
If you see the method signatures for DefaultMultipartHttpServletRequest you will see there are methods for getting the files and other parameters separately because the request body is getting used to both upload the file and to pass in other parameters.
I am relatively new to writing code against REST APIs. It is possible I am analyzing the wrong problem here, so feel free to give big picture advice. The other twist is that the API I want to use is not yet configured, so I can't test.
I need to write some Rails code to create webhooks on the Jive API. Jive's docs show how to register the webservice via a curl request. I want to build the code as an admin function of my app in case we need to recreate the webhook for any reason.
Here are the Jive Docs.
Based on this guide, I'm thinking I need something like (I expect this example to sent a POST request to "sample.jiveon.com/api/core/v3/webhooks"):
#host = "sample.jiveon.com/api/core/v3"
#port = "443"
#post_ws = "/webhooks"
#payload ={
"events" => "document",
"callback" => "my_app/jive_listener",
"object" => "my/jive/space"
}.to_json
def post
req = Net::HTTP::Post.new(#post_ws, initheader = {'Content-Type' =>'application/json'})
req['Authorization'] = "Bearer my_key"
req.body = #payload
response = Net::HTTP.new(#host, #port).start {|http| http.request(req) }
end
end
Thanks.
It would be better to use gem like 'rest-client(https://github.com/rest-client/rest-client)'
Above gem does the many stuff, which you might be doing manually using bare ruby library. It depends on need of yours.
I am trying to send some json data from my controller written in rails to a java webservice.
On form submission i take all the input fields data do some procession on it and convert it into json object using to_json.
But how can i send it to java webservice
http://localhost:8080/exim/jsonToMapService?jsonData={"key":"value"}
You can use net/http. (as #Pierre wrote, you should create a class in lib folder, and put there your function)
url = URI.parse(service_url)
headers = {"host" => URL }
req = Net::HTTP::Post.new(url.path)
req["Content-Type"] = "application/json"
req["Accept"] = "application/json"
req.body = JSON.generate(some_data)
con = Net::HTTP.new(url.host, url.port)
# ssl for https
if full_url.include?("https")
con.use_ssl = true
con.verify_mode = OpenSSL::SSL::VERIFY_NONE
end
res = con.start {|http| http.request(req) }
To do things like this I suggest using either RestClient or Faraday. Howeve I strongly suggest not doing the HTTP call in your controller.
Using RestClient, it would look like this:
RestClient.get('http://localhost:8080/exim/jsonToMapService', { key: :value })
You should create a class to extract this logic in the lib folder for example.
As #eightbitraptor mentioned it, when performing HTTP request like above, you should avoid blocking by performing them in a background process like Delayed Job, Resque or Sideqik.
HI I have been trying to call REST POST API using jersey REST Client. The API is docs is
URL:
METHOD: POST
Header Info:-
X-GWS-APP-NAME: XYZ
Accept: application/json or application/xml
My Sample Jersey client code is
Client client = Client.create();
WebResource resource=client.resource(URL);
resource.accept(javax.ws.rs.core.MediaType.APPLICATION_XML);
resource.type(javax.ws.rs.core.MediaType.APPLICATION_XML);
resource.type("charset=utf-8");
ClientResponse response = resource.post(ClientResponse.class,myReqObj);
I have been trying this code variation since last 1 week and it is not working. Any help in this regard is highly appreciated.
The tricky part is that the WebResource methods follows the Builder design pattern so it returns a Builder object which you need to preserve and carry on as you call further methods to set the full context of the request.
When you do resource.accept, it returns something you don't store, so it's lost when you do resource.type and therefore only your last call takes effect.
You'd typically set all the criterias in one line, but you could also save the output in a local variable.
ClientResponse response = client.resource(URL)
.accept(MediaType.APPLICATION_XML)
.type(MediaType.APPLICATION_XML)
.post(ClientResponse.class,myReqObj);
I do like that.
Response response = webTarget.request(MediaType.APPLICATION_JSON_TYPE)
.accept(MediaType.APPLICATION_JSON_TYPE)
.post(Entity.entity(a, "application/json; charset=UTF-8"));
here, 'a' is account class instance which like
#XmlRootElement
public class account {
...
...
}
I'm trying to send an XMLHttpRequest object to my Rails server but the headers are causing my function to stop. Here are my observations:
When I comment out the 3 lines of code that set the headers, then xhr.readyState will eventually equal 4 (alert boxes within the anonymous function fire off).
If any one of the 3 header lines are uncommented, then the xhr object never changes state (none of the alert boxes ever fire off).
function saveUserProfile(){
var user_email = $('#userEmail_box').val();
var xhr = new XMLHttpRequest();
xhr.onreadystatechange=function(){
if (xhr.readyState==4 && xhr.status==200)
{
alert("Yes: " + xhr.readyState);
}
alert("No: " + xhr.readyState);
}
var method = 'POST';
var params = 'userEmail=user_email';
var url = 'http://localhost:3000/xhr_requests.json';
var async = true;
//Need to send proper header information with POST request
xhr.setRequestHeader('Content-type', 'application/x-www-form-urlencoded');
xhr.setRequestHeader('Content-length', params.length);
xhr.setRequestHeader('Connection', 'close');
xhr.open(method, url, async);
xhr.send(params);
}
My three questions are:
What do I need to change in the code above in order to send data through the POST method?
I'm under the impression that the POST method requires some headers to be sent but am not clear about which ones though "xhr.setRequestHeader('Content-type', 'application/x-www-form-urlencoded');" seems to be one that is often mentioned in references. Can somebody help me understand a) why headers need to be sent and b) which ones need to be sent?
I'm using a rails server and am developing locally. Ultimately, this code will be executed on the client side of a mobile device which will go to a hosted rails server for passing and receiving data. Are there limitations with using the POST method with a rails server? Keep in mind that I plan to use JSON when sending information to the client from the server.
Thanks!
UPDATE: The headers should come AFTER the opening the xhr request but BEFORE sending it:
xhr.open(method, url, async);
xhr.setRequestHeader('Content-type', 'application/x-www-form-urlencoded');
xhr.setRequestHeader('Content-length', params.length);
xhr.setRequestHeader('Connection', 'close');
xhr.send(params);
Hope this post saves somebody else 4 hours.
Does your web page with the JavaScript code also live on localhost:3000? If not, this is considered a cross-domain request, and your server will need to return special headers. So you have two options:
1) Host the web page on the same domain as the server, which will make this a same-domain request.
2) Have your server return the appropriate CORS headers. You can learn more about CORS here: http://www.html5rocks.com/en/tutorials/cors/