How Can I Efficiently Parse Multiple Consecutive JSON Objects in Go?

Parsing Multiple JSON Objects in Go

When encountering multiple JSON objects, such as those returned from servers in the format:

{"something":"foo"}
{"something-else":"bar"}

parsing can prove challenging. The following code snippet demonstrates difficulties encountered when using strings.Replace:

correct_format := strings.Replace(string(resp_body), "}{", "},{", -1)
json_output := "[" + correct_format + "]"

An alternative solution lies in utilizing a json.Decoder for effective decoding:

package main

import (
    "encoding/json"
    "fmt"
    "io"
    "log"
    "strings"
)

var input = `
{"foo": "bar"}
{"foo": "baz"}
`

type Doc struct {
    Foo string
}

func main() {
    dec := json.NewDecoder(strings.NewReader(input))
    for {
        var doc Doc

        err := dec.Decode(&doc)
        if err == io.EOF {
            // all done
            break
        }
        if err != nil {
            log.Fatal(err)
        }

        fmt.Printf("%+v\n", doc)
    }
}

This approach ensures successful parsing of multiple JSON objects, even in scenarios such as Common Crawl data.

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