I'm developing a project that uses the ESP8266 with ArduinoJson library.
On my webserver I need create a http response with a JSON (read from a file) inside another JSON.
Something like this:
String data = "";
String success = "0";
File loadFile = SPIFFS.open(filename, "r");
if (!loadFile){
Serial.println("Il file non esiste: " + filename);
} else {
size_t size = loadFile.size();
if ( size == 0 ) {
Serial.println("File vuoto: " + filename);
} else {
while (loadFile.available()){
data += char(loadFile.read());
}
success = "1";
}
loadFile.close();
}
String json;
json = "{\"success\":\"" + String(success) + "\",";
json += "\"form\":\"" + data + "\"}";
server->send(200, "application/json", json);
The content of "data" variable is correct but the on client I get:
{
"success": 1,
"data": { }
}
Data is empty.
What is the right way to add a JSON string inside another JSON string in "arduino and esp8266"?
Related
I am working on a fully automatic pipeline for my company where we automatically set up projects, add users and upload files with the different APIs on BIM360. On the stage of adding a user I get a 500 internal server error:
{"code":2000,"message":"no implicit conversion of String into Integer"}
We are using a two-legged authentication approach and as such the header looks like this:
Authorization: Bearer <token> (It has account:write rights)
x-user-id: ************ (uid of my admin account)
Content-Type: application/json
The request content is this:
#"{
""email"": """ + ***#********.** + #""",
""services"": {
""document_management"": {
""access_level"": """ + admin+ #"""
},
""project_administration"": {
""access_level"": """ + admin+ #"""
}
},
""industry_roles"": []}";
I just can't quite seem to figure out what I am doing wrong. Hope someone can help me.
EDIT: Full code for this request
public async static Task<HttpStatusCode> AddUserToProjectEmail(string projectId, string accountId, string accessToken, string userToAddEmail, string userPrivilege, string adminUserId)
{
using (HttpClient httpClient = new HttpClient())
{
using (HttpRequestMessage request = new HttpRequestMessage())
{
//Documentation for what to put in the Http POST: https://forge.autodesk.com/en/docs/bim360/v1/reference/http/projects-project_id-users-import-POST/
request.Method = new HttpMethod("POST");
request.RequestUri = new Uri("https://developer.api.autodesk.com/hq/v2/regions/eu/accounts/" + accountId + "/projects/" + projectId + "/users/import");
//Make the request payload
string jsonPayload = AddPayloadToUserAddEmail(userToAddEmail, userPrivilege);
request.Content = new StringContent(jsonPayload);
request.Content.Headers.ContentType = MediaTypeHeaderValue.Parse("application/json");
request.Headers.Add("x-user-id", adminUserId);
request.Headers.Authorization = new AuthenticationHeaderValue("Bearer", accessToken);
//Send request
var response = await httpClient.SendAsync(request);
return response.StatusCode;
}
}
}
And the request payload method:
private static string AddPayloadToUserAddEmail(string userToAddEmail, string userPrivilege)
{
string payload = #"{
""email"": """ + userToAddEmail + #""",
""services"": {
""project_administration"": {
""access_level"": """ + userPrivilege + #"""
},
""document_management"": {
""access_level"": """ + userPrivilege + #"""
}
},
""industry_roles"": []
}";
return payload;
}
I have checked all the IDs through the URL on BIM360, however it's not possible to check the Uid of my account I think.
EDIT 2: I should note that I was getting a different error before I added the x-user-id header, where it just said forbidden which makes sense. This lead me to think it had something to do with the x-user-id header, but I can't figure it out.
Don't be like me and forget to wrap the payload into an array as stated on the docs that it has to be. Using this as payload worked
#"[{
""email"": """ + userToAddEmail + #""",
""services"": {
""project_administration"": {
""access_level"": """ + userPrivilege + #"""
},
""document_management"": {
""access_level"": """ + userPrivilege + #"""
}
},
""industry_roles"": []
}]";
I created an ArrayList with the json values from an Rest API.
This is the code to read the Rest API:
#RestController
public class exemploclass {
#RequestMapping(value="/vectors")
//#Scheduled(fixedRate = 5000)
public ArrayList<StateVector> getStateVectors() throws Exception {
ArrayList<StateVector> vectors = new ArrayList<>();
String url = "https://opensky-network.org/api/states/all?lamin=41.1&lomin=6.1&lamax=43.1&lomax=8.1";
//String url = "https://opensky-network.org/api/states/all?lamin=45.8389&lomin=5.9962&lamax=47.8229&lomax=10.5226";
URL obj = new URL(url);
HttpURLConnection con = (HttpURLConnection) obj.openConnection();
// optional default is GET
con.setRequestMethod("GET");
//add request header
con.setRequestProperty("User-Agent", "Mozilla/5.0");
int responseCode = con.getResponseCode();
System.out.println("\nSending 'GET' request to URL : " + url);
System.out.println("Response Code : " + responseCode);
BufferedReader in = new BufferedReader(
new InputStreamReader(con.getInputStream()));
String inputLine;
StringBuffer response = new StringBuffer();
while ((inputLine = in.readLine()) != null) {
response.append(inputLine);
}
in.close();
JSONObject myResponse = new JSONObject(response.toString());
JSONArray states = myResponse.getJSONArray("states");
System.out.println("result after Reading JSON Response");
for (int i = 0; i < states.length(); i++) {
JSONArray jsonVector = states.getJSONArray(i);
String icao24 = jsonVector.optString(0);
String callsign = jsonVector.optString(1);
String origin_country = jsonVector.optString(2);
Boolean on_ground = jsonVector.optBoolean(8);
//System.out.println("icao24: " + icao24 + "| callsign: " + callsign + "| origin_country: " + origin_country + "| on_ground: " + on_ground);
//System.out.println("\n");
StateVector sv = new StateVector(icao24, callsign, origin_country, on_ground);
vectors.add(sv);
}
System.out.println("Size of data: " + vectors.size());
return vectors;
}
}
The last line " return vectors;" returns a list with the values i parsed and returns it like this:
But i want this more "pretty", i want it to be one Array in each line, how can i achieve this?
P.S. Its on the .html page, not on console
Your return value seems a valid Json Object. If you want it more pretty so you can read it clearly then pass it through an application that makes that json pretty.
If you call your API from Postman, it will give you a pretty Json Object which will be better formatted. This will be because you have annotated your controller with #RestController so it will deliver an application/json response which Postman will know and then it will try to make it prettier.
P.S. Its on the .html page, not on console
So you hit your API from a browser. Most browsers don't expect a Json object to be returned, so they will not make it pretty. You can't force that from your Service either.
Just hit your API from Postman, it will understand it and make it pretty.
I'm using asyncHTTPrequest for async request to a REST API in ESP8266.
I receive the response in JSON format but can't parse it.
This kind of parsing was working while i used to made sync call to API.
I tried to store the request->responseText() into a String variable because its return a String, but the variable never get any value.
void sendRequest() {
if (request.readyState() == 0 || request.readyState() == 4) {
request.open("GET", "http://192.168.1.103:45456/api/systems/1013/arduino");
request.send();
}
}
void requestCB(void* optParm, asyncHTTPrequest* request, int readyState) {
if (readyState == 4) {
Serial.println(request->responseText());
const size_t capacity = JSON_ARRAY_SIZE(1) + JSON_ARRAY_SIZE(2) + JSON_OBJECT_SIZE(2) + 2*JSON_OBJECT_SIZE(4) + JSON_OBJECT_SIZE(8)+816;
DynamicJsonBuffer jsonBuffer(capacity);
JsonObject& root = jsonBuffer.parseObject(request->responseText());
String a = request->responseText();
Serial.println(a);
JsonObject& schState = root["dataForArduino"][0];
String beginTime = schState["start"]; // "2019-12-02T21:51:00"
}
}
void setup() {
Serial.begin(9600);
wifi.Connect();
request.onReadyStateChange(requestCB);
ticker.attach(5, sendRequest);
}
I have wrote json parsing function (__get_from_json) to get key value from json here
e.g. if you have json response like
{
"timestamp" : "2020-04-01 19:20:49"
}
and in your application you want to parse timestamp value from it then
char response[max_response_size] = "{ \"timestamp\" : \"2020-04-01 19:20:49\" }";
char key[max_key_size] = "timestamp";
char value[max_value_size] = "";
if( __get_from_json( response, key, value, max_value_size ) ){
Serial.println(value);
}
I had the same problem and added .c_str() to get the response to print.
So in your example it would be:
String a = request->responseText();
Serial.println(a.c_str());
For the JSON I also needed to add .c_str()
DynamicJsonDocument jsonDoc(2048);
DeserializeJson(jsonDoc, a.c_str());
How can I turn a JSON object, i.e. { username: "john", password: "1234" } into an OData string query in a function using typescript? I could not find a library to do this for me (Angular 6). Here is my attempt:
function ConvertToODataString (json: Object) {
let ret_str: string = "";
for (let key in json) {
ret_str += (key + "=" + json[key] + "&");
}
if (ret_str) {
ret_str = ret_str.substr(0, ret_str.length - 1); // remove last &
}
return ret_str;
}
Does anyone know of a better way? For now, my json is not multi-leveled.
You can use for ... in to enumerate the object properties, adding each key/value pair to an array, and combine the values with Array.join:
function convertObjectToQuery(obj: Object): string {
let values = new Array<string>();
for (let prop in obj) {
values.push(`${prop} eq '${obj[prop]}'`);
}
return encodeURI("$filter=" + values.join(" and "));
}
See this stackblitz for a demo.
JSON.parse function.
Example:
var obj = JSON.parse('{ "name":"John", "age":30, "city":"New York"}');
json={ "name":"John", "age":30, "city":"New York"};
var obj = JSON.parse(json+'');
I decided to use the HttpParms module instead:
import { HttpParams } from "#angular/common/http";
const params = new HttpParams()
.set("$filter", "Username eq '" + parameters["Username"] + "' and Password eq '" + parameters["Password"] + "'")
.set("$count", "true");
console.log(params.toString());
I'm a little stumped why I can't pull the "Type" field out of my JSON stream to make a decision. It seems like this should be so easy.
I have the following JSON that I have as input:
[
{
"Institution":"ABC",
"Facility":"XYZ",
"Make":"Sunrise",
"Model":"Admission",
"SerialNumber":"",
"Revision":"1",
"Type":"ABC_Admission",
"ArchiveData":"<CSV file contents>"
}
]
In my Java I have a try-catch block with a JsonHolder class that implements Serializable to hold the JSON. Here's the Java I currently have:
try {
// Parse and split the input
JsonHolder data = JsonHolder.getField("text", input);
DataExtractor.LOG.info("JsonHolder data= " + data);
TreeNode node = data.getTreeNode();
DataExtractor.LOG.info("node size= " + node.size());
node = node.path("Type");
JsonNode json = (JsonNode) node;
DataExtractor.LOG.info("json= " + json.asText());
// code to decide what to do based on Type found
if (json.asText().equals("ABC_Admission")) {
// do one thing
} else {
// do something else
}
} catch (IOException iox) {
DataExtractor.LOG.error("Error extracting data", iox);
this.collector.fail(input);
}
When I run my code I get the following output (NOTE: I changed my package name where the class is to just for this output display)
25741 [Thread-91-DataExtractor] INFO <proprietary package name>.DataExtractor - JsonHolder data= [
{
"Institution":"ABC",
"Facility":"XYZ",
"Make":"Sunrise",
"Model":"Admission",
"SerialNumber":"",
"Revision":"1",
"Type":"ABC_Admission",
"ArchiveData":"<CSV file contents>"
}
]
25741 [Thread-91-DataExtractor] INFO <proprietary package name>.DataExtractor - node size= 1
25741 [Thread-91-DataExtractor] INFO <proprietary package name>.DataExtractor - json=
As you can see I don't get anything out. I just want to extract the value of the field "Type", so I was expecting to get the value "ABC_Admission" in this case. I would have thought the node path would separate out just that field from the rest of the JSON tree.
What am I doing wrong?
After consulting with another developer I found out the issue is my JSON is inside an array. So, I need to iterate over that array and then pull out the Type field from the object.
The updated code to resolve this is below:
try {
// Parse and split the input
JsonHolder data = JsonHolder.getField("text", input);
DataExtractor.LOG.info("JsonHolder data= " + data);
TreeNode node = data.getTreeNode();
String type = null;
// if this is an array of objects, iterate through the array
// to get the object, and reference the field we want
if (node.isArray()){
ArrayNode ary = (ArrayNode) node;
for (int i = 0; i < ary.size(); ++i) {
JsonNode obj = ary.get(i);
if (obj.has("Type")) {
type = obj.path("Type").asText();
break;
}
}
}
if (type == null) {
// Do something with failure??
}
DataExtractor.LOG.info("json= " + type);
if (type.equals("ABC_Admission")) {
// do one thing
else {
// do something else
}
} catch (IOException iox) {
DataExtractor.LOG.error("Error extracting data", iox);
this.collector.fail(input);
}