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Fix: Use form POST submission for Collabora (not GET query string)

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- Collabora requires POST request to /loleaflet/dist/loleaflet.html
- WOPISrc must be in request body as form parameter
- Form targets iframe by name for proper document loading
- Matches WOPI/Collabora standard integration pattern
This commit is contained in:
Leon Bösche
2026-01-12 16:46:11 +01:00
parent d58137716f
commit 18f5b3f98b
1 changed files with 17 additions and 10 deletions
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27
go_cloud/internal/http/wopi_handlers.go
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@@ -5,7 +5,6 @@ import (
"fmt"
"io"
"net/http"
"net/url"
"strings"
"sync"
"time"
@@ -664,14 +663,13 @@ func collaboraProxyHandler(w http.ResponseWriter, r *http.Request, db *database.
// Build WOPISrc URL
wopiSrc := fmt.Sprintf("https://go.b0esche.cloud/wopi/files/%s?access_token=%s", fileID, accessToken)
// Build Collabora editor URL with WOPISrc in query string
collaboraEditorURL := fmt.Sprintf("%s/loleaflet/dist/loleaflet.html?WOPISrc=%s", collaboraURL, url.QueryEscape(wopiSrc))
// Return HTML page with auto-submitting form
// Collabora requires: POST to /loleaflet/dist/loleaflet.html with WOPISrc in request body
htmlContent := fmt.Sprintf(`<!DOCTYPE html>
<html>
<head>
<title>Loading Document...</title>
<meta charset="utf-8">
<style>
body { margin: 0; padding: 0; background: #f5f5f5; font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; }
.container { display: flex; justify-content: center; align-items: center; height: 100vh; }
@@ -682,15 +680,24 @@ func collaboraProxyHandler(w http.ResponseWriter, r *http.Request, db *database.
<div class="container">
<div class="message">Loading document in Collabora Online...</div>
</div>
<iframe id="collabora-frame" style="display:none; width:100%%; height:100%%; border:none;"></iframe>
<form method="POST" action="%s/loleaflet/dist/loleaflet.html" target="collabora-frame" id="collaboraForm" style="display: none;">
<input type="hidden" name="WOPISrc" value="%s">
</form>
<iframe name="collabora-frame" id="collabora-frame" style="width:100%%; height:100%%; border:none; position:absolute; top:0; left:0;"></iframe>
<script>
// Load Collabora editor in iframe
var frame = document.getElementById('collabora-frame');
frame.style.display = 'block';
frame.src = '%s';
(function() {
var form = document.getElementById('collaboraForm');
var frame = document.getElementById('collabora-frame');
if (form && frame) {
console.log('[COLLABORA] Submitting form to Collabora...');
form.submit();
} else {
console.error('[COLLABORA] Form or frame element not found!');
}
})();
</script>
</body>
</html>`, collaboraEditorURL)
</html>`, collaboraURL, wopiSrc)
w.Header().Set("Content-Type", "text/html; charset=utf-8")
// Don't set X-Frame-Options - this endpoint is meant to be loaded in an iframe