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* rework _requireResolve error throws (to avoid using lambda w/default args -- which vc++ didn't care for)

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* add ExceptionEmitters to require/resolve so errors get logged even if invoked indpendently from a script
This commit is contained in:
humbletim 2017-02-16 20:19:40 -05:00
parent efc61c25ad
commit 32e450e6c2
1 changed files with 24 additions and 24 deletions
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48
libraries/script-engine/src/ScriptEngine.cpp
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@ -1361,28 +1361,22 @@ void ScriptEngine::print(const QString& message) {
QString ScriptEngine::_requireResolve(const QString& moduleId, const QString& relativeTo) {
QUrl defaultScriptsLoc = defaultScriptsLocation();
QUrl url(moduleId);
ExceptionEmitter tryCatcher(this, __FUNCTION__);
// helper to generate an exception and return a null string
auto resolverException = [=](const QString& detail, const QString& type = "Error") -> QString {
auto displayId = moduleId;
if (displayId.length() > MAX_DEBUG_VALUE_LENGTH) {
displayId = displayId.mid(0, MAX_DEBUG_VALUE_LENGTH) + "...";
}
currentContext()->throwValue(makeError(
QString("Cannot find module '%1' (%2)")
.arg(displayId)
.arg(detail), type));
return QString();
};
auto displayId = moduleId;
if (displayId.length() > MAX_DEBUG_VALUE_LENGTH) {
displayId = displayId.mid(0, MAX_DEBUG_VALUE_LENGTH) + "...";
}
auto message = QString("Cannot find module '%1' (%2)").arg(displayId);
auto ctx = currentContext();
// de-fuzz the input a little by restricting to rational sizes
auto idLength = url.toString().length();
if (idLength < 1 || idLength > MAX_MODULE_ID_LENTGH) {
return resolverException(
QString("rejecting invalid module id size (%1 chars [1,%2])")
.arg(idLength).arg(MAX_MODULE_ID_LENTGH),
"RangeError"
);
auto details = QString("rejecting invalid module id size (%1 chars [1,%2])")
.arg(idLength).arg(MAX_MODULE_ID_LENTGH);
ctx->throwValue(makeError(message.arg(details), "RangeError"));
return nullptr;
}
// this regex matches: absolute, dotted or path-like URLs
@ -1402,12 +1396,14 @@ QString ScriptEngine::_requireResolve(const QString& moduleId, const QString& re
url = defaultScriptsLoc;
url.setPath(systemModulePath);
if (!QFileInfo(url.toLocalFile()).isFile()) {
return resolverException("system module not found");
ctx->throwValue(makeError(message.arg("system module not found")));
return nullptr;
}
}
if (url.isRelative()) {
return resolverException("could not resolve module id");
ctx->throwValue(makeError(message.arg("could not resolve module id")));
return nullptr;
}
// if it looks like a local file, verify that it's an allowed path and really a file
@ -1420,18 +1416,21 @@ QString ScriptEngine::_requireResolve(const QString& moduleId, const QString& re
bool disallowOutsideFiles = !defaultScriptsLocation().isParentOf(canonical) && !currentSandboxURL.isLocalFile();
if (disallowOutsideFiles && !PathUtils::isDescendantOf(canonical, currentSandboxURL)) {
return resolverException(
ctx->throwValue(makeError(message.arg(
QString("path '%1' outside of origin script '%2' '%3'")
.arg(PathUtils::stripFilename(url))
.arg(PathUtils::stripFilename(currentSandboxURL))
.arg(canonical.toString())
);
)));
return nullptr;
}
if (!file.exists()) {
return resolverException("path does not exist: " + url.toLocalFile());
ctx->throwValue(makeError(message.arg("path does not exist: " + url.toLocalFile())));
return nullptr;
}
if (!file.isFile()) {
return resolverException("path is not a file: " + url.toLocalFile());
ctx->throwValue(makeError(message.arg("path is not a file: " + url.toLocalFile())));
return nullptr;
}
}
@ -1611,6 +1610,7 @@ QScriptValue ScriptEngine::require(const QString& moduleId) {
// serialize require calls so the ordering/caching works correctly across multiple Entities
// note: this is a Recursive mutex so nested require's should not affected
QMutexLocker locker(&_requireLock);
ExceptionEmitter tryCatcher(this, __FUNCTION__);
// _requireDepth++;
// QObject autoDecrement;connect(&autoDecrement, &QObject::destroyed, this, [this](){ _requireDepth--; });
@ -1632,7 +1632,7 @@ QScriptValue ScriptEngine::require(const QString& moduleId) {
// start by resolving the moduleId into a fully-qualified path/URL
QString modulePath = _requireResolve(moduleId);
if (hasUncaughtException()) {
if (modulePath.isNull() || tryCatcher.hasPending()) {
// the resolver already threw an exception -- bail early
return nullValue();
}