MailJDTourDownloadDocsQualityTestsCoverage

Which source lines and branches the tests execute. Lines 91.5 %, branches 75.0 % (minimum 85 % and 72 %). main @ 399ffe3d · 21 October 2026 · pipeline 7238.

GCC Code Coverage Report

Directory: src/
Coverage: low: ≥ 0% medium: ≥ 75.0% high: ≥ 90.0%
Coverage Exec / Excl / Total
Lines: 92.3% 179 / 0 / 194
Functions: 95.2% 20 / 0 / 21
Branches: 71.2% 237 / 0 / 333
service/HtmlInlineImageService.cpp
Line Branch Exec Source
1 #include "HtmlInlineImageService.h"
2 #include "MimeParser.h"
3 #include "util/Utf8ByteCount.h"
4 #include <QCoreApplication>
5 #include <QFile>
6 #include <QFileInfo>
7 #include <QFutureWatcher>
8 #include <QSqlDatabase>
9 #include <QSqlDriver>
10 #include <QSqlError>
11 #include <QSqlQuery>
12 #include <QScopeGuard>
13 #include <QUuid>
14 #include <optional>
15 #include <QtConcurrent>
16 #include <QCryptographicHash>
17 #include <sqlite3.h>
18 #ifdef Q_OS_UNIX
19 #include <sys/stat.h>
20 #endif
21
22 namespace {
23 // S106-040: the retained connection is reused only for the same file —
24 // same path AND (on Unix) the same device and inode, like
25 // NativeImageResources. A cache database replaced at the same path (rebuild,
26 // restore) used to be read through the deleted inode until restart.
27 struct FileIdentity {
28 10 quint64 device = 0;
29 10 quint64 inode = 0;
30
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 10 bool operator==(const FileIdentity &) const = default;
31 };
32 20 std::optional<FileIdentity> fileIdentity(const QString &path) {
33 #ifdef Q_OS_UNIX
34 20 struct stat file{};
35
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 20 if (::stat(QFile::encodeName(path).constData(), &file) != 0 || !S_ISREG(file.st_mode))
36 ✗ return std::nullopt;
37 20 return FileIdentity{quint64(file.st_dev), quint64(file.st_ino)};
38 #else
39 return QFileInfo(path).isFile() ? std::optional<FileIdentity>(FileIdentity{}) : std::nullopt;
40 #endif
41 }
42
43 struct InlineReadConnection {
44 QString path;
45 QString name;
46 QSqlDatabase db;
47 FileIdentity identity;
48
49 3 ~InlineReadConnection() { reset(); }
50
51 20 void reset() {
52
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 20 if (db.isValid()) {
53 11 db.close();
54
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 11 db = QSqlDatabase();
55 }
56
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 20 if (!name.isEmpty()) QSqlDatabase::removeDatabase(name);
57 20 path.clear();
58 20 name.clear();
59 20 }
60
61 20 bool ensure(const QString &databasePath, QString *error) {
62
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 20 const auto current = fileIdentity(databasePath);
63
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 20 if (!current) {
64 ✗ reset();
65 ✗ *error = QStringLiteral("Inline image cache is unavailable");
66 ✗ return false;
67 }
68
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 20 if (db.isOpen() && path == databasePath && identity == *current) return true;
69
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 11 reset();
70
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 22 name = QStringLiteral("html-inline-") + QUuid::createUuid().toString();
71
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 22 db = QSqlDatabase::addDatabase(QStringLiteral("QSQLITE"), name);
72
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 11 db.setDatabaseName(databasePath);
73
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 22 db.setConnectOptions(QStringLiteral("QSQLITE_OPEN_READONLY;QSQLITE_BUSY_TIMEOUT=50"));
74
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 11 if (!db.open()) {
75 ✗ *error = db.lastError().text();
76 ✗ reset();
77 ✗ return false;
78 }
79 11 path = databasePath;
80 11 identity = *current;
81 11 return true;
82 }
83 };
84 }
85
86
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 23 HtmlInlineImageService::HtmlInlineImageService(QObject *parent) : QObject(parent) {
87
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 23 m_pool.setMaxThreadCount(1);
88
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 23 m_pool.setExpiryTimeout(-1);
89
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 24 connect(QCoreApplication::instance(), &QCoreApplication::aboutToQuit, this, [this] { stop(); });
90 23 }
91 44 HtmlInlineImageService::~HtmlInlineImageService() { stop(); }
92 8691 HtmlInlineImageService *HtmlInlineImageService::shared() {
93
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 8691 static QPointer<HtmlInlineImageService> service;
94
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 8691 if (!service) service = new HtmlInlineImageService(QCoreApplication::instance());
95 8691 return service;
96 }
97 24 void HtmlInlineImageService::stop() {
98 24 m_stopping = true;
99
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 24 for (const auto &request : m_pending) disconnect(request.destroyed);
100 24 m_pending.clear();
101
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 24 if (m_active) { m_active->cancelled->store(true); disconnect(m_active->destroyed); }
102
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 24 m_pool.waitForDone();
103 24 }
104 8721 void HtmlInlineImageService::cancel(QObject *owner) {
105
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 8721 if (m_active && m_active->owner == owner) m_active->cancelled->store(true);
106 8721 m_pending.removeIf([this, owner](const Request &request) {
107
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 79 if (request.owner && request.owner != owner) return false;
108 1 disconnect(request.destroyed);
109 1 return true;
110 });
111 8721 }
112 15 void HtmlInlineImageService::load(QObject *owner, HtmlInlineImageRequest input, Callback callback) {
113
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 15 cancel(owner);
114
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 17 if (!owner) return;
115 // Match the sanitizer's UTF-8 admission ceiling without cutting the existing
116 // full-HTML character capacity in half merely because QString uses UTF-16.
117 15 const qsizetype inputBytes = input.expectedHtml.size() > MaxInputBytes
118
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 15 ? MaxInputBytes + 1
119
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 14 : MailJD::utf8ByteCountUpTo(input.expectedHtml, MaxInputBytes);
120 15 qsizetype bytes = inputBytes;
121
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 15 if (m_active) bytes += m_active->inputBytes;
122
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 53 for (const auto &request : m_pending) bytes += request.inputBytes;
123
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 15 if (m_stopping || m_pending.size() >= MaxPending || bytes > MaxInputBytes ||
124
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 26 !input.mailId.isValid() || input.mailId.accountId.size() > 4096 ||
125
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 43 input.databasePath.isEmpty() || input.databasePath.size() > 4096 || input.databasePath.contains(QChar::Null)) {
126 2 callback({{}, QStringLiteral("Inline image request is unavailable or exceeds its budget")});
127 2 return;
128 }
129
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 13 Request request{owner, std::move(input), std::move(callback), inputBytes};
130 13 const auto cancelled = request.cancelled;
131
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 14 request.destroyed = connect(owner, &QObject::destroyed, this, [cancelled] { cancelled->store(true); });
132
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 13 m_pending.append(std::move(request));
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 13 startNext();
134 17 }
135 25 void HtmlInlineImageService::startNext() {
136
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 28 if (m_stopping || m_active) return;
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 15 cancel(nullptr);
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 15 if (m_pending.isEmpty()) return;
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 12 m_active = m_pending.takeFirst();
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 12 auto *watcher = new QFutureWatcher<HtmlInlineImageResult>(this);
141
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 12 connect(watcher, &QFutureWatcher<HtmlInlineImageResult>::finished, this, [this, watcher] {
142 12 auto request = std::move(*m_active);
143 12 m_active.reset();
144
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 12 auto result = watcher->result();
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 12 watcher->deleteLater();
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 12 disconnect(request.destroyed);
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 12 const QPointer<HtmlInlineImageService> guard(this);
148
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 12 if (!m_stopping && request.owner && !request.cancelled->load()) request.callback(std::move(result));
149
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 12 if (guard) startNext();
150 12 });
151 12 const auto input = m_active->input;
152 12 const auto cancelled = m_active->cancelled;
153
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 24 watcher->setFuture(QtConcurrent::run(&m_pool, [input, cancelled] { return read(input, *cancelled); }));
154 12 }
155 22 HtmlInlineImageResult HtmlInlineImageService::read(const HtmlInlineImageRequest &input, const std::atomic_bool &cancelled) {
156
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 22 if (cancelled.load()) return {};
157 // This pool has one persistent worker. Reuse its read-only connection but
158 // finish each transaction, including cancelled/error reads, before the next
159 // message so WAL checkpoints and newer mailbox epochs remain visible.
160
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 21 static thread_local InlineReadConnection connection;
161
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 21 if (!QFileInfo(input.databasePath).isFile()) {
162
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 1 connection.reset();
163 1 return {{}, QStringLiteral("Inline image cache is unavailable")};
164 }
165 20 QString error;
166
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 20 if (!connection.ensure(input.databasePath, &error)) return {{}, error};
167 20 auto &db = connection.db;
168
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 20 if (!db.transaction()) {
169 ✗ error = db.lastError().text();
170 ✗ connection.reset();
171 ✗ return {{}, error};
172 }
173 20 HtmlInlineImageResult result;
174 {
175 // A superseded mail must not keep this single foreground lane occupied
176 // while SQLite compares a large text_html value or scans CID metadata.
177 // Remove the handler before rollback or a connection reset can close the
178 // native handle; the cancellation token outlives this worker invocation.
179 20 sqlite3 *sqlite = nullptr;
180
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 20 if (auto handle = db.driver()->handle();
181
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 20 handle.isValid() && QByteArray(handle.typeName()) == "sqlite3*")
182
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 20 sqlite = *static_cast<sqlite3 **>(handle.data());
183
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 20 if (sqlite) sqlite3_progress_handler(sqlite, 1000, [](void *context) {
184 ✗ return static_cast<const std::atomic_bool *>(context)->load(
185 ✗ std::memory_order_relaxed) ? 1 : 0;
186 }, const_cast<std::atomic_bool *>(&cancelled));
187 60 const auto clearProgress = qScopeGuard([sqlite] {
188
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 20 if (sqlite) sqlite3_progress_handler(sqlite, 0, nullptr, nullptr);
189 20 });
190 20 const auto readSnapshot = [&]() -> HtmlInlineImageResult {
191
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 20 QSqlQuery header(db);
192
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 20 header.prepare(QStringLiteral("SELECT h.id FROM headers h JOIN folders f ON f.id=h.folder_id "
193 "JOIN bodies b ON b.header_id=h.id WHERE f.account=? AND h.folder_id=? AND h.uid=? "
194 "AND f.uidvalidity=? AND b.text_html=?"));
195
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 20 header.addBindValue(input.mailId.accountId);
196
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 20 header.addBindValue(input.mailId.folderId);
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 20 header.addBindValue(input.mailId.uid);
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 20 header.addBindValue(input.uidValidity);
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 20 header.addBindValue(input.expectedHtml);
200
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 20 if (!header.exec()) return {{}, header.lastError().text()};
201
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 25 if (!header.next()) return {{}, QStringLiteral("Inline image message identity or content changed")};
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 15 const auto headerId = header.value(0).toLongLong();
203
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 15 header.finish();
204 struct Metadata { qint64 id = 0, bytes = 0; QString type; int count = 0; };
205 15 QHash<QString, Metadata> metadata;
206 15 QStringList order;
207
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 15 QSqlQuery rows(db);
208
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 15 rows.prepare(QStringLiteral("SELECT id,substr(content_id,1,4097),substr(content_type,1,257),length(data) "
209 "FROM attachments WHERE header_id=? AND presentation=1 ORDER BY id LIMIT 1001"));
210
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 15 rows.addBindValue(headerId);
211
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 15 if (!rows.exec()) return {{}, rows.lastError().text()};
212 15 int count = 0;
213
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 34 while (rows.next()) {
214
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 19 if (cancelled.load()) return {};
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 19 if (++count > 1000) return {{}, QStringLiteral("Inline image metadata exceeds its budget")};
216
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 19 const auto rawId = rows.value(1).toString();
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 19 if (rawId.size() > 4096) return {{}, QStringLiteral("Inline image identifier exceeds its budget")};
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 19 const auto id = MimeParser::normalizeContentId(rawId);
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 19 if (id.isEmpty()) continue;
220
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 19 if (!metadata.contains(id)) order.append(id);
221
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 19 auto &item = metadata[id];
222 19 ++item.count;
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 19 item.id = rows.value(0).toLongLong();
224
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 19 item.type = rows.value(2).toString();
225
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 19 item.bytes = rows.value(3).toLongLong();
226 19 }
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 15 if (rows.lastError().isValid()) return {{}, rows.lastError().text()};
228
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 15 rows.finish();
229 15 HtmlInlineImageResult output;
230
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 15 output.contentDigest = QCryptographicHash::hash(input.expectedHtml.toUtf8(), QCryptographicHash::Sha256);
231 15 qint64 aggregate = 0;
232
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 33 for (const auto &id : order) {
233
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 18 if (cancelled.load()) return {};
234 18 const auto item = metadata.value(id);
235
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 17 if (item.count != 1 || item.type.size() > 256 || item.bytes <= 0 ||
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 52 item.bytes > MimeParser::MaxInlineImageBytes ||
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 18 item.bytes > MimeParser::MaxInlineImageAggregateBytes - aggregate) continue;
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 17 QSqlQuery data(db);
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 17 data.prepare(QStringLiteral("SELECT data FROM attachments WHERE id=? AND header_id=?"));
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 17 data.addBindValue(item.id);
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 17 data.addBindValue(headerId);
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 17 if (!data.exec()) return {{}, data.lastError().text()};
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 17 if (!data.next()) return {{}, QStringLiteral("Inline image disappeared inside its snapshot")};
244
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 17 const auto bytes = data.value(0).toByteArray();
245 17 aggregate += bytes.size(); // Rejected bytes also consume the read budget.
246
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 17 if (!MimeParser::isAllowedInlineImage(item.type, bytes)) continue;
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 15 const auto type = item.type.section(';', 0, 0).trimmed().toLower();
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 30 output.images.insert(id, QStringLiteral("data:%1;base64,%2").arg(type, QString::fromLatin1(bytes.toBase64())));
249 22 }
250 15 return output;
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 30 };
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 20 result = readSnapshot();
253 20 }
254 // S106-040: after a failed read the next request starts on a fresh
255 // connection (a handle broken by an SQL error was kept for the process life).
256
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 20 const bool sqlError = !result.error.isEmpty() && !cancelled.load();
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 20 if (!db.rollback()) {
258 ✗ error = db.lastError().text();
259 ✗ connection.reset();
260 ✗ return {{}, error};
261 }
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 20 if (sqlError)
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 5 connection.reset();
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 20 return cancelled.load() ? HtmlInlineImageResult{} : result;
265 22 }
266