mirror of
https://github.com/superseriousbusiness/gotosocial.git
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100 lines
3 KiB
Go
100 lines
3 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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"github.com/superseriousbusiness/gotosocial/internal/gtserror"
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"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
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)
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type DomainPermissionsRespRaw struct {
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body []byte
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}
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func (t *transport) DereferenceDomainPermissions(
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ctx context.Context,
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permSub *gtsmodel.DomainPermissionSubscription,
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useCacheHeaders bool,
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) (*DomainPermissionsRespRaw, error) {
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// Prepare new HTTP request to endpoint
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req, err := http.NewRequestWithContext(ctx, "GET", permSub.URI, nil)
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if err != nil {
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return nil, err
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}
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// Set basic auth header if necessary.
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if permSub.FetchUsername != "" || permSub.FetchPassword != "" {
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req.SetBasicAuth(permSub.FetchUsername, permSub.FetchPassword)
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}
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// Set relevant Accept headers.
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// Allow fallback in case target doesn't
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// negotiate content type correctly.
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req.Header.Add("Accept-Charset", "utf-8")
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req.Header.Add("Accept", permSub.ContentType.String()+","+"*/*")
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if useCacheHeaders {
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// If we've successfully fetched this list
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// before, set If-Modified-Since to last
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// success to make the request conditional.
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//
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// See: https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/If-Modified-Since
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if !permSub.SuccessfullyFetchedAt.IsZero() {
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timeStr := permSub.SuccessfullyFetchedAt.Format(http.TimeFormat)
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req.Header.Add("If-Modified-Since", timeStr)
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}
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// If we've got an ETag stored for this list, set
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// If-None-Match to make the request conditional.
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// See https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/ETag#caching_of_unchanged_resources.
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if len(permSub.ETag) != 0 {
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req.Header.Add("If-None-Match", permSub.ETag)
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}
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}
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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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// Read the body regardless of response code,
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// as we may want to store any error message.
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bytes, err := io.ReadAll(rsp.Body)
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if err != nil {
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return nil, err
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}
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if rsp.StatusCode == http.StatusNotModified {
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// Nothing has changed on the remote side since
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// we last fetched, so there's nothing to do.
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return nil, nil
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}
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// Ensure a non-error status response.
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if rsp.StatusCode != http.StatusOK {
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err := gtserror.NewFromResponse(rsp)
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return nil, err
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}
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}
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