According to boto3 documentation here: https://boto3.readthedocs.org/en/latest/reference/services/iot-data.html#client the update_thing_shadow method takes the thingName & JSON payload as parameters. Currently it reads:
client = boto3.client('iot-data', region_name='us-east-1')
data = {"state" : { "desired" : { "switch" : "on" }}}
mypayload = json.dumps(data)
response = client.update_thing_shadow(
thingName = 'MyDevice',
payload = b'mypayload'
)
When I use the command line there's no problem but can't seem to get it right from within the lamba function. I've called it with numerous versions of code (json.JSONEncoder, bytearray(), etc..) without any luck. The errors range from syntax to (ForbiddenException) when calling the UpdateThingShadow operation: Bad Request: ClientError. Has anyone had success calling this or a similar method from within a AWS lambda function? Thanks.
This code is working fine for me:
def set_thing_state(thingName, state):
# Change topic, qos and payload
payload = json.dumps({'state': { 'desired': { 'property': state } }})
logger.info("IOT update, thingName:"+thingName+", payload:"+payload)
#payload = {'state': { 'desired': { 'property': state } }}
response = client.update_thing_shadow(
thingName = thingName,
payload = payload
)
logger.info("IOT response: " + str(response))
logger.info("Body:"+response['payload'].read())
def get_thing_state(thingName):
response = client.get_thing_shadow(thingName=thingName)
streamingBody = response["payload"]
jsonState = json.loads(streamingBody.read())
print jsonState
#print jsonState["state"]["reported"]
Good luck
garnaat is right.
Just replace payload = b'mypayload' with payload = mypayload and it should work.
Related
const WebSocket = require('ws');
const ws = new WebSocket('wss://www.bitmex.com/realtime?subscribe=instrument:XBTUSD');
ws.on('message', function incoming(a) {
p=JSON.parse(a)
console.log(Object.keys(p));
console.log(p.data);
});
code can be tried here - npm.runkit.com/ws
I am trying to access the subparameters of the JSON object like bidprice and ask price. However unable to go beyond the data level. Have tried using data[0].bidprice,data.bidprice but nothing works.
Not sure if p.data is returning a str instead of a JSON.
Sample data is as follows
{ table: 'instrument',
action: 'update',
data:
[ { symbol: 'XBTUSD',
lastPrice: 6686,
lastTickDirection: 'MinusTick',
lastChangePcnt: 0.0053,
timestamp: '2018-09-23T15:04:18.946Z' } ] }
if output is stored as var a, a.data works but a.data.symbol or a.data[0].symbol doesnt work
EDIT: Here's a bit more context to how the JSON is received. I'm using the ApiAI API to generate a request to their platform, and they have a method to retrieve it, like this:
# instantiate ApiAI
ai = apiai.ApiAI(CLIENT_ACCESS_TOKEN)
# declare a request obect, fill in in lower lines
request = ai.text_request()
# send ApiAI the request
request.query = "{}".format(textobject.body)
# get response from ApiAI
response = request.getresponse()
response_decode = response.read().decode("utf-8")
response_data = json.loads(response_decode)
I'm coding a webapp in Django and trying to read through a JSON response POSTed to a webhook. The code to read through the JSON, after it has been decoded, is:
if response_data['result']['action'] != "":
Request.objects.create(
request = response_data['result']['resolvedQuery']
)
When I try to run this code, I get this error:
KeyError: 'result'
on the line
if response_data['result']['action'] != "":
I'm confused because it looks to me like 'result' should be a valid key to this JSON that is being read:
{
'id':'65738806-eb8b-4c9a-929f-28dc09d6a333',
'timestamp':'2017-07-10T04:59:46.345Z',
'lang':'en',
'result':{
'source':'agent',
'resolvedQuery':'Foobar',
'action':'Baz'
},
'alternateResult':{
'source':'domains',
'resolvedQuery':'abcdef',
'actionIncomplete':False,
},
'status':{
'code':200,
'errorType':'success'
}
}
Is there another way I should be reading this JSON in my program?
Try:
import JSON
if 'action' in response_data:
parsed_data = json.loads(response_data)
if parsed_data['result']['action'] != "":
Request.objects.create(request = parsed_data['result']['resolvedQuery'])
Thanks for everyone's thoughts. It turned out there was an another error with how I was trying to implement the ApiAI API, and that was causing this error. It now reads through the JSON fine, and I'm using #sasuke's suggestion.
POST ing json from javascript to server in Play Framework:
var myJson = {"name": "joe", "age":20};
var obj = JSON.parse(myJson);
$.ajax(jsRoutes.controllers.MyController.create(obj));
Now, I have the javascript router configured fine. If i recieve the obj as a string I can print it out to the console just fine.
routes.conf:
POST /person/add controllers.MyController.createFromAjax(ajax: String)
BUT, I want to write the json to MongoDB using an Async promise which Activator gives the compile time error:
scala.concurrent.Future[play.api.mvc.Result][error] cannot be applied to (String)
I have other routes that take no parameters that receive json using Postman and write it to MongoDB just fine
routes.conf
POST /heartrates/bulk controllers.HRController.createFromJson
If I omit the parameter on the route that receives the json from Ajax instead of using Postman I get a HTTP 400 error in the browser.
POST http://localhost:9000/person/add 400 (Bad Request)
SO, my question is, Ajax needs a parameter but String wont work. Play documentation says json is always received as a String. What am I doing wrong here?
Scala Controller Code taken from Lightbend seed Play.Reactive.MongoDB:
def createBulkFromAjax = Action.async(parse.json) { request =>
val documents = for {
heartRate <- request.body.asOpt[JsArray].toStream
maybeHeartRate <- heartRate.value
validHeartRate <- maybeHeartRate.transform(transformer).asOpt.toList
} yield validHeartRate
for {
heartRate <- hrFuture
multiResult <- heartRate.bulkInsert(documents = documents, ordered = true)
} yield {
Logger.debug(s"Successfully inserted with multiResult: $multiResult")
Created(s"Created ${multiResult.n} heartRate")
}
}
I think you're getting mixed up between the parameters you pass to your Action as part of the jsRoutes call, and parameters that get passed to endpoints (i.e. the query string, query parameters etc).
Play will return a 400 Bad Request if you've declared a non-optional parameter (like you did with ajax: String) and you don't then actually supply it in your request.
While conceptually you are passing obj to your action, it's not as a query parameter - you've declared that your endpoint expects an HTTP POST - so the JSON should be in the HTTP request body. Notice your other endpoints don't take any query parameters.
So step 1 is to fix your routes file (I've renamed your method to match your other existing working one):
POST /person/add controllers.MyController.createFromJson
If you look at the Play documentation for the Javascript reverse router, you'll see that you'll need to set the type (aka HTTP method) if you're doing something other than a GET. So, step 2, here's what your Javascript should look like to achieve a POST:
var myJson = {"name": "joe", "age":20};
var obj = JSON.stringify(myJson);
var r = controllers.MyController.createFromJson;
$.ajax({url: r.url, type: r.type, data: obj });
After those changes you should be good; your controller code looks fine. If you still get 400 Bad Request responses, check that jQuery is setting your Content-Type header correctly - you may need to use the contentType option in the jQuery $.ajax call.
Edit after still getting 400 errors:
I've just noticed that you were using JSON.parse in your Javascript - as per this answer you should be using JSON.stringify to convert an object into something jQuery can send - otherwise it may try to URLEncode the data and/or send the fields as query parameters.
The other thing to look at is whether the JSON you are sending actually agrees with what you're trying to parse it as. I'm not sure if you've provided a simplified version for this question but it looks like you're trying to parse:
{"name": "joe", "age":20}
Using:
request.body.asOpt[JsArray]
Which will always result in a None - you didn't give it an array.
The Answer to ajax javascript routes in Play Framework 2.5 for ReativeMongo:
routes.conf:
GET /javascriptRoutes controllers.HRController.javascriptRoutes
HRController:
def javascriptRoutes = Action { implicit request =>
Ok(
JavaScriptReverseRouter("jsRoutes")(
routes.javascript.HRController.createBulkFromAjax
)
).as("text/javascript")
}
routes.conf:
POST /heartrates/add controllers.HRController.createBulkFromAjax
main.scala.html:
<script type="text/javascript" src="#routes.HRController.javascriptRoutes"></script>
javascript:
var r = jsRoutes.controllers.HRController.createBulkFromAjax();
$.ajax({url: r.url, type: r.type, contentType: "application/json", data: JsonString });
HRController:
def createBulkFromAjax = Action.async(parse.json) { request =>
//Transformation silent in case of failures.
val documents = for {
heartRate <- request.body.asOpt[JsArray].toStream
maybeHeartRate <- heartRate.value
validHeartRate <- maybeHeartRate.transform(transformer).asOpt.toList
} yield validHeartRate
for {
heartRate <- hrFuture
multiResult <- heartRate.bulkInsert(documents = documents, ordered = true)
} yield {
Logger.debug(s"Successfully inserted with multiResult: $multiResult")
Created(s"Created ${multiResult.n} heartRate")
}
}
HRController.createBulkFromAjax was built from a Lightbend activator ui seed example called play.ReactiveMogno
I wrote this code to use the http4s client library to make a POST call to a REST web service
val client = SimpleHttp1Client()
val form = UrlForm("username" -> userName, "password" -> password)
val uri = Uri.fromString(url).valueOr(throw _)
val list = List(`Content-Type`(MediaType.`application/json`), Accept(MediaType.`application/json`))
val req = POST(uri, form).map(_.putHeaders(list :_*))
try {
val result = client.expect[String](req).unsafePerformSync
Some(result)
} catch {
case e : Throwable => println(e.getMessage); None
}
Right now, the code gets a 400 Bad Request error and I have no idea about why. I am not able to print the entire body of the error in the code above.
when I make the same REST call thru POSTMAN I can see 400 Bad request error body
{
"errors": [
"password: field is required",
"username: field is required"
]
}
How can I print the entire error body in my code?
Also, in postman when I set Content-Type and Accept headers the post call succeeds. In the code above, I am setting the same 2 headers and the same json body but still this code gets 400 error.
val list = List[Header](Header("Accept", "application/json"), Header("Content-Type", "application/json"))
val req = POST(uri, form).map(_.replaceAllHeaders(list :_*))
I had a conversation with the http4s team on gitter and I found the answer. since that conversation is not indexed by google I am writing the answer here
val output : Either[String, Foo] = client.fetch(request) {
case Successful(resp) => resp.as[Foo].map(Right(_))
case resp => resp.as[String].map(Left(_))
}
This if there is an error. we get the entire body of the error with this.
I have a json file called data.json containing some data:
[
{
"name" : "toto"
}
]
And the script I wrote to manage it :
var Data = $resource("data.json", {},
{
query: {method:'GET',isArray:true}
});
var data = Data.query(function()
{
var d = data[0];
d.name = "Titi";
d.$save();
});
Everything work before I call $save() on my object. I have this error:
[11:30:24.962] "Error: [$resource:badcfg] Error in resource configuration.
Expected response to contain an object but got an array
I don't really know the problem. I have already read many examples and documentations but this does not seem clearer to me.
Just guessing to help quickly here... You may have several issues, var d = data[0]. data should be from an argument/parameter of the function not the var data which is null until the return result from Data.query changes it. $save should also likely be on the $resource object, not the object in the array. Not an angular person, but guessing that might be the case.