add nipb0/blossom helpers.

nipb0/blossom/http.go

@@ -0,0 +1,89 @@
+package blossom
+
+import (
+	"context"
+	"encoding/base64"
+	"encoding/json"
+	"fmt"
+	"io"
+	"strconv"
+
+	"github.com/nbd-wtf/go-nostr"
+	"github.com/valyala/fasthttp"
+)
+
+// httpCall makes an HTTP request to the media server
+func (c *Client) httpCall(
+	ctx context.Context,
+	method string,
+	url string,
+	contentType string,
+	addAuthorization func() string,
+	body io.Reader,
+	contentSize int64,
+	result any,
+) error {
+	_ = ctx
+
+	req := fasthttp.AcquireRequest()
+	defer fasthttp.ReleaseRequest(req)
+
+	req.SetRequestURI(url)
+	req.Header.SetMethod(method)
+	req.Header.SetContentType(contentType)
+
+	resp := fasthttp.AcquireResponse()
+	defer fasthttp.ReleaseResponse(resp)
+
+	if addAuthorization != nil {
+		auth := addAuthorization()
+		if auth != "" {
+			req.Header.Add("Authorization", auth)
+		}
+	}
+
+	if body != nil {
+		req.SetBodyStream(body, int(contentSize))
+	}
+
+	err := c.httpClient.Do(req, resp)
+	if err != nil {
+		return fmt.Errorf("failed to call %s: %w\n", url, err)
+	}
+	if resp.Header.StatusCode() >= 300 {
+		reason := resp.Header.Peek("X-Reason")
+		return fmt.Errorf("%s returned an error (%d): %s", url, resp.StatusCode(), string(reason))
+	}
+
+	if result != nil {
+		return json.Unmarshal(resp.Body(), &result)
+	}
+
+	return nil
+}
+
+// authorizationHeader creates a Nostr-signed authorization header
+func (c *Client) authorizationHeader(
+	ctx context.Context,
+	modify func(*nostr.Event),
+) string {
+	evt := nostr.Event{
+		CreatedAt: nostr.Now(),
+		Kind:      24242,
+		Content:   "blossom stuff",
+		Tags: nostr.Tags{
+			nostr.Tag{"expiration", strconv.FormatInt(int64(nostr.Now())+60, 10)},
+		},
+	}
+
+	if modify != nil {
+		modify(&evt)
+	}
+
+	if err := c.signer.SignEvent(ctx, &evt); err != nil {
+		return ""
+	}
+
+	jevt, _ := json.Marshal(evt)
+	return "Nostr " + base64.StdEncoding.EncodeToString(jevt)
+}