nimona/go-nimona

package nimona

import (
    "fmt"
    "io"
    "net/http"
)

const (
    resolverWellKnownAlias = "https://%s/.well-known/nimona.json"
)

type ResolverHTTP struct{}

func (r *ResolverHTTP) ResolveIdentityAlias(alias IdentityAlias) (*IdentityInfo, error) {
    // make http request to url
    url := fmt.Sprintf(resolverWellKnownAlias, alias.Hostname)
    req, err := http.NewRequest("GET", url, http.NoBody)
    if err != nil {
        return nil, fmt.Errorf("unable to resolve KeygraphID: %w", err)
    }
    res, err := http.DefaultClient.Do(req)
    if err != nil {
        return nil, fmt.Errorf("unable to resolve KeygraphID: %w", err)
    }

    if res.StatusCode != 200 {
        return nil, fmt.Errorf("unable to resolve KeygraphID: %s", res.Status)
    }

    // get body
    defer res.Body.Close()
    body, err := io.ReadAll(res.Body)
    if err != nil {
        return nil, fmt.Errorf("unable to resolve KeygraphID: %w", err)
    }

    // parse response
    idDoc := &Document{}
    err = idDoc.UnmarshalJSON(body)
    if err != nil {
        return nil, fmt.Errorf("unable to resolve KeygraphID: %w", err)
    }

    // decode document
    id := &IdentityInfo{}
    err = id.FromDocument(idDoc)
    if err != nil {
        return nil, fmt.Errorf("unable to resolve KeygraphID: %w", err)
    }

    return id, nil
}