url.Values中的嵌套值

Question

I'm working on an API client and I need to be able to send a nested JSON structure with a client.PostForm request. The issue I'm encountering is this:

reqBody := url.Values{
    "method": {"server-method"},
    "arguments": {
        "download-dir": {"/path/to/downloads/dir"},
        "filename":     {variableWithURL},
        "paused":       {"false"},
    },
}

When I try to go build this, I get the following errors:

./transmission.go:17: syntax error: unexpected :, expecting }
./transmission.go:24: non-declaration statement outside function body
./transmission.go:26: non-declaration statement outside function body
./transmission.go:27: non-declaration statement outside function body
./transmission.go:29: non-declaration statement outside function body
./transmission.go:38: non-declaration statement outside function body
./transmission.go:39: syntax error: unexpected }

I'm wondering what the correct way to created a nested set of values in this scenario. Thanks in advance!

Answer 1

You are not using properly the url.Values, according to the source code (url package, url.go):

// Values maps a string key to a list of values.
// It is typically used for query parameters and form values.
// Unlike in the http.Header map, the keys in a Values map
// are case-sensitive.
type Values map[string][]string

But arguments is not compliant with the definition because the object of arguments is not an array of strings.