83 lines
2.4 KiB
Go
83 lines
2.4 KiB
Go
package opentimestamps
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import (
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"bytes"
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"context"
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"fmt"
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"io"
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"net/http"
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)
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func Stamp(ctx context.Context, calendarUrl string, digest [32]byte) (Sequence, error) {
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body := bytes.NewBuffer(digest[:])
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req, err := http.NewRequestWithContext(ctx, "POST", normalizeUrl(calendarUrl)+"/digest", body)
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if err != nil {
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return nil, err
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}
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req.Header.Add("User-Agent", "github.com/fiatjaf/opentimestamps")
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req.Header.Add("Accept", "application/vnd.opentimestamps.v1")
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req.Header.Add("Content-Type", "application/x-www-form-urlencoded")
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resp, err := http.DefaultClient.Do(req)
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if err != nil {
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return nil, fmt.Errorf("'%s' request failed: %w", calendarUrl, err)
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}
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full, err := io.ReadAll(resp.Body)
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if err != nil {
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return nil, fmt.Errorf("failed to read response from '%s': %w", calendarUrl, err)
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}
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resp.Body.Close()
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seq, err := parseCalendarServerResponse(newBuffer(full))
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if err != nil {
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return nil, fmt.Errorf("failed to parse response from '%s': %w", calendarUrl, err)
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}
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return seq, nil
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}
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func ReadFromFile(data []byte) (*File, error) {
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return parseOTSFile(newBuffer(data))
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}
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func UpgradeSequence(ctx context.Context, seq Sequence, initial []byte) (Sequence, error) {
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result := seq.Compute(initial)
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attestation := seq.GetAttestation()
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url := fmt.Sprintf("%s/timestamp/%x", normalizeUrl(attestation.CalendarServerURL), result)
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req, err := http.NewRequestWithContext(ctx, "GET", url, nil)
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if err != nil {
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return nil, err
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}
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req.Header.Add("User-Agent", "github.com/fiatjaf/opentimestamps")
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req.Header.Add("Accept", "application/vnd.opentimestamps.v1")
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req.Header.Add("Content-Type", "application/x-www-form-urlencoded")
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resp, err := http.DefaultClient.Do(req)
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if err != nil {
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return nil, fmt.Errorf("'%s' request failed: %w", attestation.CalendarServerURL, err)
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}
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if resp.StatusCode >= 300 {
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return nil, fmt.Errorf("'%s' returned %d", attestation.CalendarServerURL, resp.StatusCode)
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}
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body, err := io.ReadAll(resp.Body)
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if err != nil {
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return nil, fmt.Errorf("failed to read response from '%s': %w", attestation.CalendarServerURL, err)
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}
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resp.Body.Close()
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tail, err := parseCalendarServerResponse(newBuffer(body))
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if err != nil {
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return nil, fmt.Errorf("failed to parse response from '%s': %w", attestation.CalendarServerURL, err)
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}
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newSeq := make(Sequence, len(seq)+len(tail)-1)
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copy(newSeq, seq[0:len(seq)-1])
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copy(newSeq[len(seq)-1:], tail)
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return newSeq, nil
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}
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