80 lines
2.5 KiB
Go
80 lines
2.5 KiB
Go
// GoToSocial
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// Copyright (C) GoToSocial Authors admin@gotosocial.org
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// SPDX-License-Identifier: AGPL-3.0-or-later
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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package transport
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import (
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"context"
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"io"
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"net/http"
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"net/url"
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apiutil "github.com/superseriousbusiness/gotosocial/internal/api/util"
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"github.com/superseriousbusiness/gotosocial/internal/config"
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"github.com/superseriousbusiness/gotosocial/internal/gtserror"
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"github.com/superseriousbusiness/gotosocial/internal/uris"
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)
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func (t *transport) Dereference(ctx context.Context, iri *url.URL) ([]byte, error) {
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// if the request is to us, we can shortcut for certain URIs rather than going through
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// the normal request flow, thereby saving time and energy
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if iri.Host == config.GetHost() {
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if uris.IsFollowersPath(iri) {
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// the request is for followers of one of our accounts, which we can shortcut
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return t.controller.dereferenceLocalFollowers(ctx, iri)
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}
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if uris.IsUserPath(iri) {
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// the request is for one of our accounts, which we can shortcut
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return t.controller.dereferenceLocalUser(ctx, iri)
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}
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}
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// Build IRI just once
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iriStr := iri.String()
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// Prepare new HTTP request to endpoint
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req, err := http.NewRequestWithContext(ctx, "GET", iriStr, 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("Accept", string(apiutil.AppActivityLDJSON)+","+string(apiutil.AppActivityJSON))
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req.Header.Add("Accept-Charset", "utf-8")
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req.Header.Set("Host", iri.Host)
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// Perform the HTTP request
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rsp, err := t.GET(req)
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if err != nil {
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return nil, err
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}
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defer rsp.Body.Close()
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// Ensure a non-error status response.
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if rsp.StatusCode != http.StatusOK {
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return nil, gtserror.NewFromResponse(rsp)
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}
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// Ensure that the incoming request content-type is expected.
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if ct := rsp.Header.Get("Content-Type"); !apiutil.ASContentType(ct) {
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err := gtserror.Newf("non activity streams response: %s", ct)
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return nil, gtserror.SetMalformed(err)
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}
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return io.ReadAll(rsp.Body)
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}
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