61 lines
1.3 KiB
Go
61 lines
1.3 KiB
Go
package protocol
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import (
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"bytes"
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"context"
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"encoding/json"
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"iter"
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"log"
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"net/http"
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"github.com/MetaMask/go-did-it"
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"github.com/ucan-wg/go-ucan/pkg/command"
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"github.com/ucan-wg/go-ucan/token/delegation"
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"github.com/ucan-wg/go-ucan/toolkit/client"
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"github.com/ucan-wg/go-ucan/toolkit/issuer"
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)
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var _ client.DelegationRequester = &Requester{}
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type Requester struct {
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issuerURL string
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}
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func NewRequester(issuerURL string) *Requester {
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return &Requester{issuerURL: issuerURL}
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}
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func (r Requester) RequestDelegation(ctx context.Context, audience did.DID, cmd command.Command, subject did.DID) (iter.Seq2[*delegation.Bundle, error], error) {
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log.Printf("requesting delegation for %s on %s", cmd, subject)
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// we match the simple json protocol of the issuer
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data := struct {
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Audience string `json:"aud"`
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Cmd string `json:"cmd"`
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Subject string `json:"sub"`
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}{
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Audience: audience.String(),
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Cmd: cmd.String(),
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Subject: subject.String(),
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}
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buf := &bytes.Buffer{}
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err := json.NewEncoder(buf).Encode(data)
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if err != nil {
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return nil, err
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}
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req, err := http.NewRequest(http.MethodPost, r.issuerURL, buf)
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if err != nil {
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return nil, err
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}
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res, err := http.DefaultClient.Do(req.WithContext(ctx))
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if err != nil {
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return nil, err
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}
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return issuer.DecodeResponse(res, audience, cmd, subject)
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}
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