一个HTTP分隔符来全部统治

Question

I have a configuration file in the format of blah = foo. I would like to have entries like:

http = https://stackoverflow.com/questions,header keys and values,string to search for.

I'm okay requiring that the the url be urlecncoded. Is there any ASCII character I can use that won't be valid value anywhere in the above example (After splitting once on =)? My example uses a comma but I think that is valid in a header value?

After pouring through some RFCs I figure someone is more familiar with this can save me some pain.

Also my project is in Go if there are existing std library that might help with this...

Answer 1

You can use a non-ascii character and urlencode, for example using the middle dot (compose + ^ + . on linux):

const sep = `·`
const t = `http = https://stackoverflow.com/questions·string to search for·header=value·header=value`

func parseLine(line string) (name, url, search string, headers []string) {
    idx := strings.Index(line, " = ")
    if idx == -1 {
        return
    }
    name = line[:idx]
    parts := strings.Split(line[idx+3:], sep)
    if len(parts) < 3 {
        // handle invalid line
    }
    url, search = parts[0], parts[1]
    headers = parts[2:]
    return
}

Although, using JSON is probably the best and most long-term maintainable option.

For completeness sake, a json version would look like:

type Site struct {
    Url     string
    Query   string
    Headers map[string]string
}

const t = `[
    {
        "url": "https://stackoverflow.com/questions",
        "query": "string to search for",
        "headers": {"header": "value", "header2": "value"}
    },
    {
        "url": "https://google.com",
        "query": "string to search for",
        "headers": {"header": "value", "header2": "value"}
    }
]`

func main() {
    var sites []Site
    err := json.Unmarshal([]byte(t), &sites)
    fmt.Printf("%+v (%v)
", sites, err)
}