How to read local json import in flutter?

You should look into loading assets in flutter. You can’t simply import an arbitrary file. Importing is for source code/libraries. You need to declare this file as an asset in your pubspec.yaml flutter: assets: – json_data.json Then in your code you can load this asset as a String: import ‘package:flutter/services.dart’ show rootBundle; Future<String> getJson() { … Read more

CORS enabled but response for preflight has invalid HTTP status code 404 when POSTing JSON

Thanks but getting 405 error,after the above config changes. Finally it works after adding below code in web api Global.asax file protected void Application_BeginRequest(Object sender, EventArgs e) { //HttpContext.Current.Response.AddHeader(“Access-Control-Allow-Origin”, “*”); if (HttpContext.Current.Request.HttpMethod == “OPTIONS”) { HttpContext.Current.Response.AddHeader(“Cache-Control”, “no-cache”); HttpContext.Current.Response.AddHeader(“Access-Control-Allow-Methods”, “GET, POST”); HttpContext.Current.Response.AddHeader(“Access-Control-Allow-Headers”, “Content-Type, Accept”); HttpContext.Current.Response.AddHeader(“Access-Control-Max-Age”, “1728000”); HttpContext.Current.Response.End(); } }

passing JSON data to a Spring MVC controller

Add the following dependencies <dependency> <groupId>org.codehaus.jackson</groupId> <artifactId>jackson-mapper-asl</artifactId> <version>1.9.7</version> </dependency> <dependency> <groupId>org.codehaus.jackson</groupId> <artifactId>jackson-core-asl</artifactId> <version>1.9.7</version> </dependency> Modify request as follows $.ajax({ url:urlName, type:”POST”, contentType: “application/json; charset=utf-8”, data: jsonString, //Stringified Json Object async: false, //Cross-domain requests and dataType: “jsonp” requests do not support synchronous operation cache: false, //This will force requested pages not to be cached by the … Read more

Escaping Regex to get Valid JSON

Its just the slashes that are messing up the validation you could encode them using %5C which is the hex encoding of \ or what Mike W says you could double escape like \\ and then you could just decode them when you want to use them

How to format timestamp in outgoing JSON

What you can do is, wrap time.Time as your own custom type, and make it implement the Marshaler interface: type Marshaler interface { MarshalJSON() ([]byte, error) } So what you’d do is something like: type JSONTime time.Time func (t JSONTime)MarshalJSON() ([]byte, error) { //do your serializing here stamp := fmt.Sprintf(“\”%s\””, time.Time(t).Format(“Mon Jan _2”)) return []byte(stamp), … Read more

Dump Mongo Collection into JSON format

Mongo includes a mongoexport utility (see docs) which can dump a collection. This utility uses the native libmongoclient and is likely the fastest method. mongoexport -d <database> -c <collection_name> Also helpful: -o: write the output to file, otherwise standard output is used (docs) –jsonArray: generates a valid json document, instead of one json object per … Read more