Struct to CSV data as string without creating CSV file

I have a struct which I want to convert into a CSV string. I don't have to write the CSV file. I just need to create the CSV string.

The Go CSV package (https://golang.org/pkg/encoding/csv/) only provides the writing facility.

Here's the struct:

type myData struct {
    A string `json:"a"`
    B string `json:"b"`
    C string `json:"c"`
}

CSV:

1,2,3
4, ,6

I wanted a CSV string so that I can directly upload the string as a file in cloud storage via a serverless environment. So, I want to avoid creating a file in serverless environment.

Is there any package that can help in doing this?

You can use bytes.Buffer to write CSV data and get string using its String() function like this (live):

package main

import (
    "bytes"
    "encoding/csv"
    "fmt"
    "log"
)

func main() {
    data := [][]string{
        {"id", "name"},
        {"123", "ABC"},
        {"456", "XYZ"},
    }

    b := new(bytes.Buffer)
    w := csv.NewWriter(b)

    w.WriteAll(data)
    if err := w.Error(); err != nil {
        log.Fatal(err)
    }

    s := b.String()
    fmt.Println(s)
}

Output:

id,name
123,ABC
456,XYZ