Sync: var fs = require(‘fs’); var obj = JSON.parse(fs.readFileSync(‘file’, ‘utf8’)); Async: var fs = require(‘fs’); var obj; fs.readFile(‘file’, ‘utf8’, function (err, data) { if (err) throw err; obj = JSON.parse(data); });
Json.NET does this… string json = @”{“”key1″”:””value1″”,””key2″”:””value2″”}”; var values = JsonConvert.DeserializeObject<Dictionary<string, string>>(json); More examples: Serializing Collections with Json.NET
In Node.js, you can use util.inspect(object). It automatically replaces circular links with “[Circular]”. Albeit being built-in (no installation is required), you must import it import * as util from ‘util’ // has no default export import { inspect } from ‘util’ // or directly // or var util = require(‘util’) To use it, simply call … Read more
Yes there are a couple of standards (albeit some liberties on the definition of standard) that have emerged: JSON API – JSON API covers creating and updating resources as well, not just responses. JSend – Simple and probably what you are already doing. OData JSON Protocol – Very complicated. HAL – Like OData but aiming … Read more
You can use Jackson’s class-level annotation: import com.fasterxml.jackson.annotation.JsonIgnoreProperties @JsonIgnoreProperties class { … } It will ignore every property you haven’t defined in your POJO. Very useful when you are just looking for a couple of properties in the JSON and don’t want to write the whole mapping. More info at Jackson’s website. If you want to … Read more
Technically YAML is a superset of JSON. This means that, in theory at least, a YAML parser can understand JSON, but not necessarily the other way around. See the official specs, in the section entitled “YAML: Relation to JSON”. In general, there are certain things I like about YAML that are not available in JSON. … Read more
jQuery.ajax attempts to convert the response body depending on the specified dataType parameter or the Content-Type header sent by the server. If the conversion fails (e.g. if the JSON/XML is invalid), the error callback is fired. Your AJAX code contains: dataType: “json” In this case jQuery: Evaluates the response as JSON and returns a JavaScript … Read more
With ES2017 async/await support, this is how to POST a JSON payload: (async () => { const rawResponse = await fetch(‘https://httpbin.org/post’, { method: ‘POST’, headers: { ‘Accept’: ‘application/json’, ‘Content-Type’: ‘application/json’ }, body: JSON.stringify({a: 1, b: ‘Textual content’}) }); const content = await rawResponse.json(); console.log(content); })(); Can’t use ES2017? See @vp_art’s answer using promises The question … Read more
I asked a similar question here: How do I upload a file with metadata using a REST web service? You basically have three choices: Base64 encode the file, at the expense of increasing the data size by around 33%, and add processing overhead in both the server and the client for encoding/decoding. Send the file … Read more
JSON does not allow real line-breaks. You need to replace all the line breaks with \n. eg: “first line second line” can saved with: “first line\nsecond line” Note: for Python, this should be written as: “first line\\nsecond line” where \\ is for escaping the backslash, otherwise python will treat \n as the control character “new … Read more