regex匹配字符串值并替换golang中所有出现的内容

Question

what would be the regex to match string

"{{media url=\"wysiwyg/Out_story.png\"}}

or

"{{skin url=\"wysiwyg/Out_story.png\"}}

in Golang

I need to replace every instance of these, there could be any number of them and replace it with

https://img.abc.com/xyz/valueOfURL from above

Answer 1

({{(media|skin) url=\\"(.*)\\"}}) should do the job.

It also will allow you to get the type (media or skin) as a string in your code for further use if needed.

For example, this code:

package main

import "fmt"
import "regexp"

func main() {

    re := regexp.MustCompile(`{{(media|skin) url=.*}}`)
    stringMedia := "{{media url=\"wysiwyg/Out_story.png\"}}"
    stringSkin := "{{skin url=\"wysiwyg/Out_story.png\"}}"

    match := re.FindStringSubmatch(stringMedia)
    if len(match) != 0 {
        fmt.Printf("1. %s
", match[1])
    }

    match = re.FindStringSubmatch(stringSkin)
    if len(match) != 0 {
        fmt.Printf("2. %s
", match[1])
    }
}

Outputs

1. media
2. skin

Then, to replace the match with the URL it contained, you can do something like this (Note the tweaks to the regexp to capture the full match as well as the url independently):

package main

import (
    "fmt"
    "regexp"
    "strings"
)

func main() {

    re := regexp.MustCompile(`({{(media|skin) url=\\"(.*)\\"}})`)
    stringMedia := "other stuff {{media url=\"wysiwyg/Out_story.png\"}} other stuff"
    stringSkin := "other stuff {{skin url=\"wysiwyg/Out_story.png\"}} other stuff"

    match := re.FindStringSubmatch(stringMedia)
    if len(match) != 0 {
        stringMedia = strings.Replace(stringMedia, match[1], fmt.Sprintf("https://img.abc.com/xyz/%s", match[3]), -1)
        fmt.Println(stringMedia)
    }

    match = re.FindStringSubmatch(stringSkin)
    if len(match) != 0 {
        stringSkin = strings.Replace(stringSkin, match[1], fmt.Sprintf("https://img.abc.com/xyz/%s", match[3]), -1)
        fmt.Println(stringSkin)
    }
}

Outputs:

other stuff https://img.abc.com/xyz/wysiwyg/Out_story.png other stuff
other stuff https://img.abc.com/xyz/wysiwyg/Out_story.png other stuff

You can test it out yourself on regex-golang.appspot.com or on the playground.