Home Backend Development Golang golang json escape characters

golang json escape characters

May 15, 2023 am 11:05 AM

In golang, json is a commonly used data exchange format. It can easily serialize structured data into json format, and can also deserialize back to the original data type from json format data. In the process of using json, sometimes you need to escape some special characters to avoid errors in the json string. So, how to escape json characters in golang? This article will introduce it to you in detail.

json in golang

In golang, you can use the encoding/json package to process json data. This package provides Marshal and Unmarshal functions, which can convert any data type in golang into a json format string, and convert a json format string back to the original data type in golang. The following is a simple example:

package main

import (
    "encoding/json"
    "fmt"
)

type Person struct {
    Name string `json:"name"`
    Age  int    `json:"age"`
}

func main() {
    p := Person{
        Name: "Tom",
        Age:  20,
    }
    data, _ := json.Marshal(p)
    fmt.Println(string(data))

    var newPerson Person
    json.Unmarshal(data, &newPerson)
    fmt.Println(newPerson)
}
Copy after login

The output result is:

{"name":"Tom","age":20}
{Tom 20}
Copy after login

As you can see, by serializing the Person structure instance into a json format string, and then deserializing it and Restoring it to a new Person instance realizes the process of converting the golang data type into json format, and then converting it back to the golang data type in the opposite direction.

Escape characters in json strings

In json strings, some characters need to be escaped, otherwise syntax errors will occur. Common escape characters include:

##\bBackspace##\f\n\r\tIf you do not use escape characters in the json string, but directly write special characters such as double quotes into the string, the following error will appear:
Escape character Meaning
\"Double quotes
\Backslash
/Forward slash
Page change
Line feed
Enter
Horizontal tab character
{"name": "Tom", "introduction": "I'm a "programmer""}
Copy after login

In the above json string, the double quotation mark does not use an escape character after the last word "programmer", causing the json encoder to not recognize it correctly. this string. This error can be handled as follows:

{"name":"Tom","introduction":"I'm a "programmer""}
Copy after login

In the above string, the programmer has used double quotes (") to escape the double quotes in the last word, thereby avoiding the json encoder An error occurred.

Json escape character processing

In golang, you can use json.Marshal for json escape character processing. This function will escape any required characters, including basic escape characters and Unicode code points.

For example, if you need to convert the following structure:

type Person struct {
    Name   string `json:"name"`
    Gender string `json:"gender"`
}
Copy after login

into the following json format string:

{"name":"Tom","gender":"He said, "I'm the best!""}
Copy after login
Copy after login

, you can use the following code:

p := Person{
    Name:   "Tom",
    Gender: `He said, "I'm the best!"`,
}
data, _ := json.Marshal(p)
fmt.Println(string(data))
Copy after login

The output result is:

{"name":"Tom","gender":"He said, "I'm the best!""}
Copy after login
Copy after login

It can be seen that when using the json.Marshal function to serialize the p instance into a string in json format, the double quotes are automatically escaped to ", thereby avoiding json encoding Converter error.

In addition to common escape characters, the json.Marshal function provided by golang can also handle control characters and multi-byte characters. We can serialize structure data into characters in json format Before string, process the characters that need to be escaped:

p := Person{
    Name:   "Tom",
    Gender: `He said, "I'm the best!"`,
}

// 处理多字节字符
p.Gender = strings.Replace(p.Gender, "!", "\uff01", -1)

// 处理控制字符
p.Gender = strings.Replace(p.Gender, "", "\u0001", -1)

data, _ := json.Marshal(p)
fmt.Println(string(data))
Copy after login

In the above code, first use the strings.Replace function in golang's standard library to replace the multi-byte characters in the string with the corresponding UTF-8 code point; then use the same method to replace the control characters in the string. Finally, use json.Marshal to serialize the p instance into a string in json format, and the output result is:

{"name":"Tom","gender":"He said, "I'm the best!\uff01""}
Copy after login

You can see that in the json string, we have escaped the characters that need to be escaped into the corresponding escape characters. This can avoid json encoder errors.

Summary

In golang, you can use the json.Marshal function to easily convert structure data into a json format string and automatically escape the characters that need to be escaped. This can avoid errors in the json string. The correctness of json data is guaranteed. When processing json data, other methods need to be used for conversion of multi-byte characters and control characters.

The above is the detailed content of golang json escape characters. For more information, please follow other related articles on the PHP Chinese website!

Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

AI Hentai Generator

AI Hentai Generator

Generate AI Hentai for free.

Hot Article

R.E.P.O. Energy Crystals Explained and What They Do (Yellow Crystal)
2 weeks ago By 尊渡假赌尊渡假赌尊渡假赌
Repo: How To Revive Teammates
4 weeks ago By 尊渡假赌尊渡假赌尊渡假赌
Hello Kitty Island Adventure: How To Get Giant Seeds
3 weeks ago By 尊渡假赌尊渡假赌尊渡假赌

Hot Tools

Notepad++7.3.1

Notepad++7.3.1

Easy-to-use and free code editor

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use

Zend Studio 13.0.1

Zend Studio 13.0.1

Powerful PHP integrated development environment

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)

Go language pack import: What is the difference between underscore and without underscore? Go language pack import: What is the difference between underscore and without underscore? Mar 03, 2025 pm 05:17 PM

This article explains Go's package import mechanisms: named imports (e.g., import "fmt") and blank imports (e.g., import _ "fmt"). Named imports make package contents accessible, while blank imports only execute t

How to convert MySQL query result List into a custom structure slice in Go language? How to convert MySQL query result List into a custom structure slice in Go language? Mar 03, 2025 pm 05:18 PM

This article details efficient conversion of MySQL query results into Go struct slices. It emphasizes using database/sql's Scan method for optimal performance, avoiding manual parsing. Best practices for struct field mapping using db tags and robus

How to implement short-term information transfer between pages in the Beego framework? How to implement short-term information transfer between pages in the Beego framework? Mar 03, 2025 pm 05:22 PM

This article explains Beego's NewFlash() function for inter-page data transfer in web applications. It focuses on using NewFlash() to display temporary messages (success, error, warning) between controllers, leveraging the session mechanism. Limita

How can I define custom type constraints for generics in Go? How can I define custom type constraints for generics in Go? Mar 10, 2025 pm 03:20 PM

This article explores Go's custom type constraints for generics. It details how interfaces define minimum type requirements for generic functions, improving type safety and code reusability. The article also discusses limitations and best practices

How do I write mock objects and stubs for testing in Go? How do I write mock objects and stubs for testing in Go? Mar 10, 2025 pm 05:38 PM

This article demonstrates creating mocks and stubs in Go for unit testing. It emphasizes using interfaces, provides examples of mock implementations, and discusses best practices like keeping mocks focused and using assertion libraries. The articl

How to write files in Go language conveniently? How to write files in Go language conveniently? Mar 03, 2025 pm 05:15 PM

This article details efficient file writing in Go, comparing os.WriteFile (suitable for small files) with os.OpenFile and buffered writes (optimal for large files). It emphasizes robust error handling, using defer, and checking for specific errors.

How do you write unit tests in Go? How do you write unit tests in Go? Mar 21, 2025 pm 06:34 PM

The article discusses writing unit tests in Go, covering best practices, mocking techniques, and tools for efficient test management.

How can I use tracing tools to understand the execution flow of my Go applications? How can I use tracing tools to understand the execution flow of my Go applications? Mar 10, 2025 pm 05:36 PM

This article explores using tracing tools to analyze Go application execution flow. It discusses manual and automatic instrumentation techniques, comparing tools like Jaeger, Zipkin, and OpenTelemetry, and highlighting effective data visualization

See all articles