1 files changed, 36 insertions, 0 deletions
diff --git a/src/cidschemehandler.cpp b/src/cidschemehandler.cpp
new file mode 100644
index 0000000..b4bb836
--- /dev/null
+++ b/src/cidschemehandler.cpp
@@ -0,0 +1,36 @@
+#include "cidschemehandler.h"
+
+#include <QBuffer>
+#include <QWebEngineUrlRequestJob>
+
+CidSchemeHandler::CidSchemeHandler(QObject *parent)
+    : QWebEngineUrlSchemeHandler(parent)
+{
+}
+
+void CidSchemeHandler::requestStarted(QWebEngineUrlRequestJob *job)
+{
+    // QUrl::path() returns the percent-DECODED body of a cid: URL (confirmed
+    // in Task 5's RequestInterceptor tests, and re-verified here for the
+    // namespaced "<prefix>!<id>" form specifically: '!' needs no percent
+    // escaping per RFC 3986 sub-delims, and even when a Content-ID's own
+    // characters are percent-encoded by the sender, decoding is idempotent
+    // with how the prefix was concatenated in HtmlBuilder::namespaceCids, so
+    // the string handed to path() here is exactly the map key that was
+    // inserted for this part).
+    const QString id = job->requestUrl().path();
+
+    if (!m_parts.contains(id)) {
+        job->fail(QWebEngineUrlRequestJob::UrlNotFound);
+        return;
+    }
+
+    const InlinePart part = m_parts.value(id);
+
+    // The buffer is parented to the job so it lives exactly as long as needed.
+    auto *buffer = new QBuffer(job);
+    buffer->setData(part.data);
+    buffer->open(QIODevice::ReadOnly);
+
+    job->reply(part.mimeType.toUtf8(), buffer);
+}