I initialize my SockJs URL as
var protocols = ['xhr-polling', 'xdr-polling', 'xdr-streaming', 'xhr-streaming'];
var options = {protocols_whitelist: protocols, debug: true,server:tets};
_ws = new SockJS(url, null, options);
I want to send out a request parameter , for example somesite/sockjs/info?someparam=tets"
Is it possible? Documentation of SockJs refers that options is map which can have key value but i am not sure what key to use here.
I verified URL at server which SockJs sends over and it is
http://http_backend/cecobrowsega-3.0.0.0.31/sockjs/testapp/620/4ydem52f/xhr?null
So in absence of request param its appending a null, seems there is a way to send over request param!
It's available in latest sock js client. Discussion here https://github.com/sockjs/sockjs-client/issues/72
we can pass query string along with the connection URL, same syntax as for any HTTP call
For those who needs code sample:
var socket = new SockJS('http://localhost/ws?token=AAA');
var stompClient = Stomp.over(socket);
stompClient.connect({}, function(frame) {
stompClient.subscribe('/topic/echo', function(data) {
// topic handler
});
}
}, function(err) {
// connection error
});
Now all the requests related to websocket will have parameter "?token=AAA"
http://localhost/ws/info?token=AAA&t=1446482506843
http://localhost/ws/515/z45wjz24/websocket?token=AAA
Tested with SockJS 1.0.3
Related
I use electronjs for building a cross platform desktop application. I would like to send a custom header with a value for every request from electron. Initially in loadURL(), i could use extraHeaders to set the custom header. How to send it in all subsequent requests?
As recommended by the documentation, you should use session object and the method onBeforeSendHeaders:
const { session } = require('electron')
// Modify the user agent for all requests to the following urls.
const filter = {
urls: ['https://*.github.com/*', '*://electron.github.io']
}
session.defaultSession.webRequest.onBeforeSendHeaders(filter, (details, callback) => {
details.requestHeaders['User-Agent'] = 'MyAgent'
callback({ requestHeaders: details.requestHeaders })
})
I am developing a SAPUI5 application that uses the SAP OData service CRM_OPPORTUNITY.
In my program I am trying to do the following request to the OData service
getMax: function(oEvent) {
var oModel = this.getOpportunityODataService();
var maxHitData;
oModel
.read(
"RetrieveMaxHit",
null,
null,
false,
function(oData, resp) {
maxHitData = {
RetrieveMaxHit: resp.data.results[0]
};
});
return maxHitData;
},
getOpportunityODataService : function(){
var oModel = new sap.ui.model.odata.ODataModel("/sap/opu/odata/sap/CRM_OPPORTUNITY/");
oModel.forceNoCache(true);
return oModel;
},
The response to this request does not contain any response Data. resp.data is undefined.
If I do the request in a browser I get the following response
<d:RetrieveMaxHit xmlns:d="http://schemas.microsoft.com/ado/2007/08/dataservices" xmlns:m="http://schemas.microsoft.com/ado/2007/08/dataservices/metadata" m:type="CRM_OPPORTUNITY.MaxHit">
<d:MaxHitNumber>100</d:MaxHitNumber>
<d:ActionResult>X</d:ActionResult>
</d:RetrieveMaxHit>
I hope someone can help me grasp why resp.data does not contain the data returned from the sevice? What am I missing?
Should you not use
oModel
.read(
"**/**RetrieveMaxHit",
Did you also check on your gateway system with /IWFND/TRACES that the correct service is invoked and is indeed giving back the correct feedback?
Problem was that the oDatamodel had to be instantiated with JSON set to TRUE. Apparently the response in XML returned when calling the FunctionImport was not able to be correctly mapped into the response.Data.
var parameters = {
json: true
};
var oModel = new sap.ui.model.odata.ODataModel("http://XXXXX:XXXX/sap/opu/odata/sap/CRM_OPPORTUNITY/", parameters);
I established a RESTful server, and I can get a simple string with my Chrome or IE using this URL: "http://localhost:8080/WebService/RESTful/getString"
But when using Dart, it always returns a error message:
"[object XMLHttpRequestProgressEvent]"
From the onError() callback method,
I'm sure that server returns a string with "text/plain" MIME type in Java.
Here is the code:
import 'dart:html';
void main() {
HtmlElement btn = document.body.querySelector("#btn");
btn.onClick.listen(onClick);
}
void onClick(Event v) {
var url = "http://localhost:8080/WebService/RESTful/getString";
HttpRequest.getString(url).then((str) {
window.alert(str.toString());
}, onError: (e) {
window.alert(e);
});
}
Who can help me ?
If you try to fetch resources from another server than the one your page was loaded from, this server needs to return CORS headers otherwise your browser refuses to fetch form this other server.
It depends on your server how this can be configured or added.
See for example
- How do you add CORS headers in Redstone interceptor?
- CORS with Dart, how do I get it to work?
The code part:
function PushRequests(strUser, eClientType, iSectorId, strDeviceId, arrRequests) {
var input = {
method : 'post',
returnedContentType : 'xml',
path : 'SomeAddress/PushRequests',
parameters : {
'strUser' : strUser.toString(),
'eClientType' : eClientType.toString(),
'iSectorId' : iSectorId.toString(),
'strDeviceId' : strDeviceId.toString(),
'arrRequests' : arrRequests // <- the array
}
};
return WL.Server.invokeHttp(input);
}
The response:
Procedure invocation error. Content is not allowed in prolog.,Failed to parse the payload from backend (procedure: HttpRequest)
I have tried to strignify the array by the navite way and via JSON. This is not the solution.
I know the problem is with the array passed. Does anybody know a workaround, or a way to correctly pass an array to the adapter?
I know the problem is with the array passed.
How do you know this?
Content is not allowed in prolog.
This is almost always a symptom of passing data to an XML parser that is invalid XML, or has some characters before the prolog, which is:
<?xml version="1.0" encoding="utf-8"?>
In your adapter, you've told it to expect XML from the backend HTTP service you're calling. I was able to reproduce the same message you see by returning invalid XML from my backend HTTP service. In fact, I can put anything in the response that is invalid XML, and I'll get the "Content is not allowed in prolog." message. I can return a page that is a 404 page, or with a Content-Type header of "text/plain". The adapter was told to expect XML, but given something else.
Please be sure to check that you are not getting a 404 page, or 500, or something else from the backend HTTP service your adapter is calling.
Here's how I reproduced the "Content is not allowed in prolog" message from my adapter:
First, create an adapter with xmltester.xml:
<wl:adapter name="xmltester"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:wl="http://www.worklight.com/integration"
xmlns:http="http://www.worklight.com/integration/http">
<displayName>xmltester</displayName>
<description>xmltester</description>
<connectivity>
<connectionPolicy xsi:type="http:HTTPConnectionPolicyType">
<protocol>http</protocol>
<domain>localhost</domain>
<port>3000</port>
</connectionPolicy>
<loadConstraints maxConcurrentConnectionsPerNode="2" />
</connectivity>
<procedure name="getStuff"/>
</wl:adapter>
and xmltester-impl.js:
function getStuff() {
var input = {
method : 'get',
returnedContentType : 'xml',
path : 'index.xml',
parameters : {
'arrRequests' : JSON.stringify(['one', 'two'])
}
};
return WL.Server.invokeHttp(input);
}
I created a node server (server.js) to be my backend:
var express = require('express');
var app = express();
var port = 3000;
app.get('/index.xml', function(req, res){
var body = '<?xml version="1.0" encoding="utf-8"?><boo/>';
res.setHeader('Content-Type', 'application/xml');
res.setHeader('Content-Length', body.length);
res.end(body);
});
app.listen(port);
console.log('Listening on port %s', port);
Started the server:
npm install express
node server.js
Then created a Worklight app with a button:
<button id="doit">Do it!</button>
And linked up a click listener to see what I get back from Worklight when the adapter is invoked:
$ = WLJQ;
$("#doit").click(function() {
var invocationData = {
adapter : 'xmltester',
procedure : 'getStuff',
parameters : []
};
WL.Client.invokeProcedure(invocationData,{
onSuccess : function(data) {alert("SUCCESS" + JSON.stringify(data));},
onFailure : function(data) {alert("FAILURE" + JSON.stringify(data));}
});
return false;
});
I could recreate the problem exactly when my backend server returned a payload with extra characters in front of the prolog (which you can try yourself by editing the server.js code above), like:
somethinghere<?xml version="1.0" encoding="utf-8"?>
Or any non-XML payload, for that matter.
returnedContentType : 'xml'
Failed to parse the payload from backend
Is the returned content in xml format? If not, can you cange the returnedContentType field to 'plain' or 'html' or whichever format you are expecting it in?
We are building a server with net module, and having hard time extracting the URL (and resource path) from the request. The following code crashes, saying:
Parameter 'url' must be a string not undefined.
File netServer.js:
var net = require('net');
var url = require('url');
var server = net.createServer(function(socket) { //'connection' listener
socket.on('connect', function(request) {
});
socket.on('data', function(request) {
var pathname = url.parse(request.url).pathname;
console.log("Request for " + pathname + " received.");
});
socket.on('end', function() {
});
});
server.listen(8080, function() { //'listening' listener
console.log('server bound');
});
Any suggestions?
Are you trying to build an HTTP server? net is a TCP package, so all you get is the remoteAddress and remotePort, the rest will be sent on the data handler (which is just passed a Buffer, or a string, depending on the encoding).
Use the HTTP module for this, because it does all of the parsing for you.