@Melchicédec NDUWAYO I tried deleting one comment and ended up deleting full thing, sorry. I have a backup of the instructions I provided initially. Later we found this was related to CORS and that Livy does not support it yet. So alternatives are using an http proxy or your web application to redirect the requests. web page --> your web app backend --> livy I recommend you use google Postman as it has a feature to generate jquery code. Here is the jquery code to start a session: var settings = {
"async": true,
"crossDomain": true,
"url": "http://localhost:8999/sessions",
"method": "POST",
"headers": {
"Content-Type": "application/json",
"X-Requested-By": "user",
"Cache-Control": "no-cache",
},
"processData": false,
"data": "{\"kind\": \"spark\"}"
}
$.ajax(settings).done(function (response) {
console.log(response);
});
Of course on the done function instead of printing to console you need to parse the json and grab the session id to use later as a variable.
Then you will need to wait until session state transitions to idle, in oder to do this you need to execute the following request in regular intervals until state = idle: var settings = {
"async": true,
"crossDomain": true,
"url": "http://c24-node2:8999/sessions/<session_id>",
"method": "GET",
"headers": {
"Cache-Control": "no-cache",
"Postman-Token": "60246911-890b-4f81-8635-da52e54ef633"
}
}
$.ajax(settings).done(function (response) {
console.log(response);
});
Above done function needs to parse the json and check if state is idle
Once state is idle we can submit code using the following jquery code: var settings = {
"async": true,
"crossDomain": true,
"url": "http://c24-node2:8999/sessions/<session_id>/statements",
"method": "POST",
"headers": {
"Content-Type": "application/json",
"X-Requested-By": "user",
"Cache-Control": "no-cache",
"Postman-Token": "aece2722-cbdd-48a2-ae9a-821aba97a2b6"
},
"processData": false,
"data": "{\"code\": \"1 + 1\"}"
}
$.ajax(settings).done(function (response) {
console.log(response);
});
The above is pushing code "1+1" - Same as before with session we need to grab the result in done function and save the statement id to use later to retrieve the results.
With session id and statement id we can retrieve the results of the execution by running the following jquery: var settings = {
"async": true,
"crossDomain": true,
"url": "http://c24-node2:8999/sessions/<session_id>/statements/<statment_id>",
"method": "GET",
"headers": {
"Content-Type": "application/json",
"X-Requested-By": "user",
"Cache-Control": "no-cache",
"Postman-Token": "3be8a12e-af07-4567-83ff-e37b48974e76"
}
}
$.ajax(settings).done(function (response) {
console.log(response);
});
The result of the above execution should be similar to this: {
"id": 1,
"code": "1 + 1",
"state": "available",
"output": {
"status": "ok",
"execution_count": 1,
"data": {
"text/plain": "res1: Int = 2"
}
},
"progress": 1
}
Hopefully this will help you. Feel free to update this thread if you have any questions.
HTH
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