I have searched in this forum for quiet a bit and here's my problem -
I have a ng-repeat in my html which takes in a list of messages(Json object).
Each message JSON has a sender email address - e.g. abc#gmail.com
Now, I have to get the email address from the message and form another REST API request to fetch their images for e.g. - http://<>:8080/getImage/abc#gmail.com (email address dynamic)
So in my code, I'll have a ng-repeat and a ng-src pointing to the image REST URL
If there's no image in server, it returns a 404 and displays a broken image on the UI. How do I handle it? On the other hand, if I make a http request to determine if there's a success message and on failure return a default image, then the whole thing goes through an endless loop. I'll try to create a fiddle and include it for better explanation.
Use the error block to handle such behavior:
function($http) {
var restUrl = 'getImage/abc';
return {
fetchImage: function(imageId) {
var self = this;
return $http.get(restUrl + '/' + imageId).
success(function(data) {
return self.imageUrl = data;
}).
error(function(data) {
return self.imageUrl = "pathToDefaultImage";
});
},
...
Related
I have a question regarding a small issue that I'm having. I've created a widget that will live on the Service Portal to allow an admin to Accept or Reject requests.
The data for the widget is pulling from the Approvals (approval_approver) table. Under my GlideRecord, I have a query that checks for the state as requested. (Ex. addQuery('state', 'requested'))
To narrow down the search, I tried entering addQuery('sys_id', current.sys_id). When I use this query, my script breaks and I get an error on the Service Portal end.
Here's a sample of the GlideRecord script I've written to Accept.
[//Accept Request
if(input && input.action=="acceptApproval") {
var inRec1 = new GlideRecord('sysapproval_approver');
inRec1.addQuery('state', 'requested');
//inRec1.get('sys_id', current.sys_id);
inRec1.query();
if(inRec1.next()) {
inRec1.setValue('state', 'Approved');
inRec1.setValue('approver', gs.getUserID());
gs.addInfoMessage("Accept Approval Processed");
inRec1.update();
}
}][1]
I've research the web, tried using $sp.getParameter() as a work-around and no change.
I would really appreciate any help or insight on what I can do different to get script to work and filter the right records.
If I understand your question correctly, you are asking how to get the sysId of the sysapproval_approver record from the client-side in a widget.
Unless you have defined current elsewhere in your server script, current is undefined. Secondly, $sp.getParameter() is used to retrieve URL parameters. So unless you've included the sysId as a URL parameter, that will not get you what you are looking for.
One pattern that I've used is to pass an object to the client after the initial query that gets the list of requests.
When you're ready to send input to the server from the client, you can add relevant information to the input object. See the simplified example below. For the sake of brevity, the code below does not include error handling.
// Client-side function
approveRequest = function(sysId) {
$scope.server.get({
action: "requestApproval",
sysId: sysId
})
.then(function(response) {
console.log("Request approved");
});
};
// Server-side
var requestGr = new GlideRecord();
requestGr.addQuery("SOME_QUERY");
requestGr.query(); // Retrieve initial list of requests to display in the template
data.requests = []; // Add array of requests to data object to be passed to the client via the controller
while(requestsGr.next()) {
data.requests.push({
"number": requestsGr.getValue("number");
"state" : requestsGr.getValue("state");
"sysId" : requestsGr.getValue("sys_id");
});
}
if(input && input.action=="acceptApproval") {
var sysapprovalGr = new GlideRecord('sysapproval_approver');
if(sysapprovalGr.get(input.sysId)) {
sysapprovalGr.setValue('state', 'Approved');
sysapprovalGr.setValue('approver', gs.getUserID());
sysapprovalGr.update();
gs.addInfoMessage("Accept Approval Processed");
}
...
I would like to make a simple contact form for my website. I know how to use ajax to send data, but I don't know how to access it on the Node JS server.
If I were to send my data using this code:
var request=new XMLHttpRequest();
request.open("POST","url");
request.send("{value:'10'}");
How can I access my value in the JSON object I pass to the server?
There are a lot of ways to do this.
For example you could create an endpoint on your server e.g. with express http://expressjs.com/. It might look like this
router.post('/your/url', function(req, res, data) {
var value = req.body.value;
// do cool things with value
res.send('cool');
});
You define a post endpoint which will handle your request. Using the request object you can access the JSON object from the request
I used request_.on("data", function(data_){}); to get my data.
If in my client JS I use request.send("my data");
I can access my data by adding a listener to the request_ object in my Node JS server function.
request_.on("data", function(data_){
console.log(data_);// my data
}
I can then slice up my data any way I want to and use it how I see fit. No need for Express.
Here's my client function that is called when the submit button on my contact form is pressed:
function clickSubmit(event_) {
var xmlhttprequest = new XMLHttpRequest();
xmlhttprequest.open("POST", "contact");
xmlhttprequest.send("email=" + html.email.value + "&name=" + html.name.value + "&message=" + html.message.value);
}
And here's my Node JS server function:
function handleRequest(request_, response_) {
switch(request_.url) {
case "/contact":
request_.on("data", function(data_) {
console.log("data: " + data_);// Outputs the string sent by AJAX.
});
break;
}
}
I am trying to render my riot tags on the server side and this works fine. The tags gets rendered on the server side and gets loaded on the client. Problem arises when I try to define my tags along with the definition of my routes using riot.route. The tags gets compiled to its corresponding Js files but on hitting my route it hits an internal server error and the error logged in the console is riot.route is not a function.
Code for my riot route in the script section of my tag.
<script>
var self = this;
this.data = opts.datastore
this.page = opts.datastore[0]
riot.route(function(id)
{
this.page = this.data.filter(function(r) { return r.id == id })[0] || {}
this.update();
})
this.doUpdate = function update()
{
opts.remarks = this.fname.value;
}
</script>
The data here comes from my server.js file via the datastore option and is a json data.
I have a servicestack service which when called via the browser (restful) Url ex:http://localhost:1616/myproducts, it works fine.
The service method has RedisCaching enabled. So first time it hits the data repository and caches it for subsequent use.
My problem is when I try calling it from a c# client via Soap12ServiceClient. It returns the below error:
Error in line 1 position 183. Expecting element '<target response>'
from namespace 'http://schemas.datacontract.org/2004/07/<target namespace>'..
Encountered 'Element' with name 'base64Binary',
namespace 'http://schemas.microsoft.com/2003/10/Serialization/'.
Below is my Client code:
var endpointURI = "http://mydevelopmentapi.serverhostingservices.com:1616/";
using (IServiceClient client = new Soap12ServiceClient(endpointURI))
{
var request = new ProductRequest { Param1 = "xy23432"};
client.Send<ProductResponse>(request);
}
It seems that the soapwsdl used is giving the problem, but I appear to have used the defaults as generated by servicestack..
Any help will be much appreciated.
Update
I was able over come this error by changing the cache code at the service end:
Code that returned error at client end:
return RequestContext.ToOptimizedResultUsingCache(this.CacheClient, cacheKey,
() =>
new ProductResponse(){CreateDate = DateTime.UtcNow,
products = new productRepository().Getproducts(request)
});
Code that works now:
var result = this.CacheClient.Get<ProductResponse>(cacheKey);
if (result == null)
{
this.CacheClient.Set<ProductResponse>(cacheKey, productResult);
result = productResult;
}
return result;
But I am still curious to know why the first method (RequestContext.ToOptimizedResultUsingCache) returned error at c# client?
But I am still curious to know why the first method (RequestContext.ToOptimizedResultUsingCache) returned error at c# client?
From what I can tell, the ToOptimizedResultUsingCache is trying to pull a specific format (xml, html, json, etc) out of the cache based on the RequestContext's ResponseContentType (see code here and here). When using the Soap12ServiceClient the ResponseContentType is text/html (not sure if this is correct/intentional within ServiceStack). So what ToOptimizedResultUsingCache is pulling out of the cache is a string of html. The html string is being returned to the Soap12ServiceClient and causing an exception.
By pulling directly out of the cache you are bypassing ToOptimizedResultUsingCache's 'format check' and returning something the Soap12ServiceClient can handle.
** If you are using Redis and creating your key with UrnId.Create method you should see a key like urn:ProductResponse:{yourkey}.html
Thanks for your response paaschpa.
I revisited the code and I was able to fix it. Since your response gave me the direction, I have accepted your answer. Below is my fix.
I moved the return statement from RequestContext to the response DTO.
Code which throws error when used via c# client (code was returning entire requestcontext):
return RequestContext.ToOptimizedResultUsingCache(this.CacheClient, cacheKey,
() =>
new ProductResponse(){CreateDate = DateTime.UtcNow,
products = new productRepository().Getproducts(request)
});
Fixed Code (return moved to response DTO):
RequestContext.ToOptimizedResultUsingCache(this.CacheClient, cacheKey,
() => {
return new ProductResponse(){CreateDate = DateTime.UtcNow,
products = new productRepository().Getproducts(request)
}
});
I have a Javascript component that when the DOM is loaded it needs to send a request out to our CDN, which may be in a different domain, to see if there is content for this component. If there is, the component will self-instantiate (its a link to open an embedded video in a modal), if not it will self destruct. My question is mainly about the Grails controller I am using to proxy the AJAX request.
Here is the JS in pseudocode:
checkForVideoAssets: function(videoDataUrl){
Ajax.get(videoDataUrl, function(data){
if(data.responseText==='error'){
//tear down the component
}
else{
//if there is data for the video instantiate the component
}
Here is the Grails controller:
def checkForModalVideoAsset = {
def req = new URL("http://" + params.videoUrl + "/expense/videos/")
def connection = req.openConnection()
if(connection.responseCode != 200){
render 'error'
}
if(connection.responseCode == 200){
render req.getText()
}
}
So, to sum up, the JS grabs an attribute from the DOM that has part of a URL (that we define by convention), sends that URL to the controller, the controller attempts to connect to that URL (at our CDN) and then passes that response back to the AJAX success callback inside the responseText part of the XHR object. This feels less than ideal to me, is it possible to pass the actual response back up to the JS function?
The httpbuilder may be usefull to you
I never tried it but something similar!?
def checkForModalVideoAsset = {
def http = new HTTPBuilder("http://" + params.videoUrl )
http.get(
path : "/expense/videos/",
contentType : TEXT ) { resp, reader ->
response.properties=resp.properties //<-- to easy to work but why not try :)
response << resp
}
}