An example of implementation of markdown parsing library with go language


Blackfriday is a markdown processor implemented in go. You can input user provided data safely, fast, support universal extensions (tables, smart punctuation replacement, etc.), and it is safe input for all UTF-8 (Unicode).

Currently, HTML output and smartypants extension are supported.


First of all, of course, we should introduce:



output := blackfriday.MarkdownBasic(input)

Here, input is of type [] byte, and string of markdown type can be forced to be [] byte, that is, input = [] byte (string)

If you want to filter untrusted content, use the following method:


package main

import (


func main() {
  input := []byte("### 5 It's a good go document website
  unsafe := blackfriday.MarkdownCommon(input)
  html := bluemonday.UGCPolicy().SanitizeBytes(unsafe)

These are basically the operations

When I add a new article, I convert the data submitted by the form directly through the above method, and store both the markdown and the converted content in the database

However, when I render in the front end, there is another problem, that is, the HTML tags in the converted content will be directly displayed on the web page. To avoid this situation, I use the custom template function

//Defining template functions
  func unescaped(x string) interface{} { return template.HTML(x)}

  //Register template functions
  t := template.New("post.html")
  t = t.Funcs(template.FuncMap{"unescaped": unescaped})
  t, _ = t.ParseFiles("templates/post.html")
  t.Execute(w, post)

  //Using template functions

  {{ .Content|unescaped }}

The above is the whole content of this article, I hope to help you in your study, and I hope you can support developeppaer more.

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