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// SPDX-FileCopyrightText: Copyright The Miniflux Authors. All rights reserved.
// SPDX-License-Identifier: Apache-2.0
package rssbridge // import "miniflux.app/integration/rssbridge"
import (
"encoding/json"
"fmt"
"log/slog"
"net/http"
"net/url"
"strings"
"time"
)
const defaultClientTimeout = 30 * time.Second
type Bridge struct {
URL string `json:"url"`
BridgeMeta BridgeMeta `json:"bridgeMeta"`
}
type BridgeMeta struct {
Name string `json:"name"`
}
func DetectBridges(rssBridgeURL, websiteURL string) ([]*Bridge, error) {
endpointURL, err := url.Parse(rssBridgeURL)
if err != nil {
return nil, fmt.Errorf("RSS-Bridge: unable to parse bridge URL: %w", err)
}
values := endpointURL.Query()
values.Add("action", "findfeed")
values.Add("format", "atom")
values.Add("url", websiteURL)
endpointURL.RawQuery = values.Encode()
slog.Debug("Detecting RSS bridges", slog.String("url", endpointURL.String()))
request, err := http.NewRequest(http.MethodGet, endpointURL.String(), nil)
if err != nil {
return nil, fmt.Errorf("RSS-Bridge: unable to create request: %w", err)
}
httpClient := &http.Client{Timeout: defaultClientTimeout}
response, err := httpClient.Do(request)
if err != nil {
return nil, fmt.Errorf("RSS-Bridge: unable to execute request: %w", err)
}
defer response.Body.Close()
if response.StatusCode == http.StatusNotFound {
return nil, nil
}
if response.StatusCode > 400 {
return nil, fmt.Errorf("RSS-Bridge: unexpected status code %d", response.StatusCode)
}
var bridgeResponse []*Bridge
if err := json.NewDecoder(response.Body).Decode(&bridgeResponse); err != nil {
return nil, fmt.Errorf("RSS-Bridge: unable to decode bridge response: %w", err)
}
for _, bridge := range bridgeResponse {
slog.Debug("Found RSS bridge",
slog.String("name", bridge.BridgeMeta.Name),
slog.String("url", bridge.URL),
)
if strings.HasPrefix(bridge.URL, "./") {
bridge.URL = rssBridgeURL + bridge.URL[2:]
slog.Debug("Rewrited relative RSS bridge URL",
slog.String("name", bridge.BridgeMeta.Name),
slog.String("url", bridge.URL),
)
}
}
return bridgeResponse, nil
}
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