json – Page 73 – Tarik Billa

How do I send a JSON string in a POST request in Go

September 24, 2022 by Tarik

I’m not familiar with napping, but using Golang’s net/http package works fine (playground): func main() { url := “http://restapi3.apiary.io/notes” fmt.Println(“URL:>”, url) var jsonStr = []byte(`{“title”:”Buy cheese and bread for breakfast.”}`) req, err := http.NewRequest(“POST”, url, bytes.NewBuffer(jsonStr)) req.Header.Set(“X-Custom-Header”, “myvalue”) req.Header.Set(“Content-Type”, “application/json”) client := &http.Client{} resp, err := client.Do(req) if err != nil { panic(err) } defer … Read more

How do I consume the JSON POST data in an Express application

September 23, 2022 by Tarik

I think you’re conflating the use of the response object with that of the request. The response object is for sending the HTTP response back to the calling client, whereas you are wanting to access the body of the request. See this answer which provides some guidance. If you are using valid JSON and are … Read more

Select objects based on value of variable in object using jq

September 22, 2022 by Tarik

Adapted from this post on Processing JSON with jq, you can use the select(bool) like this: $ jq ‘.[] | select(.location==”Stockholm”)’ json { “location”: “Stockholm”, “name”: “Walt” } { “location”: “Stockholm”, “name”: “Donald” }

Using jq to parse and display multiple fields in a json serially

September 21, 2022 by Tarik

I recommend using String Interpolation: jq ‘.users[] | “\(.first) \(.last)”‘ We are piping down the result of .users[] to generate the string “.first .last” using string interpolation. \(foo) syntax is used for string interpolation in jq. So, for the above example, it becomes “Stevie Wonder” (“.users[].first .users[].second” working elementwise) and “Michael Jackson”. jq reference: String … Read more

What are the differences between JSON and JSONP?

September 21, 2022 by Tarik

JSONP is JSON with padding. That is, you put a string at the beginning and a pair of parentheses around it. For example: //JSON {“name”:”stackoverflow”,”id”:5} //JSONP func({“name”:”stackoverflow”,”id”:5}); The result is that you can load the JSON as a script file. If you previously set up a function called func, then that function will be called … Read more

Is there a way to automatically build the package.json file for Node.js projects

September 18, 2022 by Tarik

The package.json file is used by npm to learn about your node.js project. Use npm init to generate package.json files for you! It comes bundled with npm. Read its documentation here: https://docs.npmjs.com/cli/init Also, there’s an official tool you can use to generate this file programmatically: https://github.com/npm/init-package-json

How to escape double quotes in JSON

September 17, 2022 by Tarik

Try this: “maingame”: { “day1”: { “text1”: “Tag 1”, “text2”: “Heute startet unsere Rundreise \” Example text\”. Jeden Tag wird ein neues Reiseziel angesteuert bis wir.</strong> ” } } (just one backslash (\) in front of quotes).

Can you use a trailing comma in a JSON object?

September 17, 2022 by Tarik

Unfortunately the JSON specification does not allow a trailing comma. There are a few browsers that will allow it, but generally you need to worry about all browsers. In general I try turn the problem around, and add the comma before the actual value, so you end up with code that looks like this: s.append(“[“); … Read more

Explanation of JSONB introduced by PostgreSQL

September 16, 2022 by Tarik

First, hstore is a contrib module, which only allows you to store key => value pairs, where keys and values can only be texts (however values can be sql NULLs too). Both json & jsonb allows you to store a valid JSON value (defined in its spec). F.ex. these are valid JSON representations: null, true, … Read more

XSLT equivalent for JSON

September 14, 2022 by Tarik

XSLT equivalents for JSON – a list of candidates (tools and specs) Tools 1. XSLT You can use XSLT for JSON with the aim of fn:json-to-xml. This section describes facilities allowing JSON data to be processed using XSLT. 2. jq jq is like sed for JSON data – you can use it to slice and … Read more