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rewrite network_access_manager and lxd backend to use POCO
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
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@@ -15,60 +15,189 @@ | |
| * | ||
| */ | ||
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| #include "local_socket_reply.h" | ||
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| #include <multipass/exceptions/local_socket_connection_exception.h> | ||
| #include <multipass/format.h> | ||
| #include <multipass/network_access_manager.h> | ||
| #include <Poco/Net/SocketAddress.h> | ||
| #include <Poco/Exception.h> | ||
| #include <QUrl> | ||
| #include <QByteArray> | ||
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| namespace mp = multipass; | ||
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| mp::NetworkAccessManager::NetworkAccessManager(QObject* parent) : QNetworkAccessManager(parent) | ||
| mp::NetworkAccessManager::NetworkAccessManager() | ||
| { | ||
| } | ||
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| mp::NetworkAccessManager::~NetworkAccessManager() | ||
| { | ||
| } | ||
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| QNetworkReply* mp::NetworkAccessManager::createRequest(QNetworkAccessManager::Operation operation, | ||
| const QNetworkRequest& orig_request, QIODevice* device) | ||
| QByteArray mp::NetworkAccessManager::sendRequest(const QUrl& url, const std::string& method, const QByteArray& data, | ||
| const std::map<std::string, std::string>& headers) | ||
| { | ||
| auto scheme = orig_request.url().scheme(); | ||
| auto scheme = url.scheme(); | ||
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| // To support http requests over Unix sockets, the initial URL needs to be in the form of: | ||
| // unix:///path/to/unix_socket@path/in/server (or 'local' instead of 'unix') | ||
| // | ||
| // For example, to get the general LXD configuration when LXD is installed as a snap: | ||
| // unix:////var/snap/lxd/common/lxd/[email protected] | ||
| if (scheme == "unix" || scheme == "local") | ||
| { | ||
| const auto url_parts = orig_request.url().toString().split('@'); | ||
| if (url_parts.count() != 2) | ||
| return sendUnixRequest(url, method, data, headers); | ||
| } | ||
| else | ||
| { | ||
| throw std::runtime_error("Only UNIX socket requests are supported"); | ||
| } | ||
| } | ||
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| QByteArray mp::NetworkAccessManager::sendMultipartRequest(const QUrl& url, const std::string& method, | ||
| const std::vector<std::pair<std::string, Poco::Net::PartSource*>>& parts, | ||
| const std::map<std::string, std::string>& headers) | ||
| { | ||
| auto scheme = url.scheme(); | ||
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| if (scheme == "unix" || scheme == "local") | ||
| { | ||
| return sendUnixMultipartRequest(url, method, parts, headers); | ||
| } | ||
| else | ||
| { | ||
| throw std::runtime_error("Only UNIX socket requests are supported"); | ||
| } | ||
| } | ||
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| QByteArray mp::NetworkAccessManager::sendUnixRequest(const QUrl& url, const std::string& method, const QByteArray& data, | ||
| const std::map<std::string, std::string>& headers) | ||
| { | ||
| // Parse the URL to get the socket path and the request path | ||
| auto url_str = url.toString(); | ||
| auto url_parts = url_str.split('@'); | ||
| if (url_parts.count() != 2) | ||
| { | ||
| throw std::runtime_error("The local socket scheme is malformed."); | ||
| } | ||
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| auto socket_path = QUrl(url_parts[0]).path().toStdString(); | ||
| auto request_path = url_parts[1].toStdString(); | ||
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| try | ||
| { | ||
| // Create a local stream socket and connect to the UNIX socket | ||
| Poco::Net::SocketAddress local_address(socket_path); | ||
| Poco::Net::StreamSocket local_socket; | ||
| local_socket.connect(local_address); | ||
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| // Create an HTTP client session with the local socket | ||
| Poco::Net::HTTPClientSession session(local_socket); | ||
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| // Create the request | ||
| Poco::Net::HTTPRequest request(method, "/" + request_path, Poco::Net::HTTPMessage::HTTP_1_1); | ||
| if (!data.isEmpty()) | ||
| request.setContentLength(data.size()); | ||
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| // Set headers | ||
| for (const auto& header : headers) | ||
| { | ||
| throw LocalSocketConnectionException("The local socket scheme is malformed."); | ||
| request.set(header.first, header.second); | ||
| } | ||
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| const auto socket_path = QUrl(url_parts[0]).path(); | ||
| // Send the request | ||
| std::ostream& os = session.sendRequest(request); | ||
| if (!data.isEmpty()) | ||
| { | ||
| os.write(data.constData(), data.size()); | ||
| } | ||
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| LocalSocketUPtr local_socket = std::make_unique<QLocalSocket>(); | ||
| // Receive the response | ||
| Poco::Net::HTTPResponse response; | ||
| std::istream& rs = session.receiveResponse(response); | ||
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| local_socket->connectToServer(socket_path); | ||
| if (!local_socket->waitForConnected(5000)) | ||
| // Read the response data | ||
| QByteArray response_data; | ||
| char buffer[1024]; | ||
| while (rs.read(buffer, sizeof(buffer))) | ||
| { | ||
| response_data.append(buffer, rs.gcount()); | ||
| } | ||
| // Read any remaining bytes | ||
| if (rs.gcount() > 0) | ||
| { | ||
| throw LocalSocketConnectionException( | ||
| fmt::format("Cannot connect to {}: {}", socket_path, local_socket->errorString())); | ||
| response_data.append(buffer, rs.gcount()); | ||
| } | ||
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| const auto server_path = url_parts[1]; | ||
| QNetworkRequest request{orig_request}; | ||
| return response_data; | ||
| } | ||
| catch (Poco::Exception& ex) | ||
| { | ||
| throw std::runtime_error("Failed to communicate over UNIX socket: " + ex.displayText()); | ||
| } | ||
| } | ||
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| QUrl url(QString("/%1").arg(server_path)); | ||
| url.setHost(orig_request.url().host()); | ||
| QByteArray mp::NetworkAccessManager::sendUnixMultipartRequest(const QUrl& url, const std::string& method, | ||
| const std::vector<std::pair<std::string, Poco::Net::PartSource*>>& parts, | ||
| const std::map<std::string, std::string>& headers) | ||
| { | ||
| // Parse the URL to get the socket path and the request path | ||
| auto url_str = url.toString(); | ||
| auto url_parts = url_str.split('@'); | ||
| if (url_parts.count() != 2) | ||
| { | ||
| throw std::runtime_error("The local socket scheme is malformed."); | ||
| } | ||
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| request.setUrl(url); | ||
| auto socket_path = QUrl(url_parts[0]).path().toStdString(); | ||
| auto request_path = url_parts[1].toStdString(); | ||
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| try | ||
| { | ||
| // Create a local stream socket and connect to the UNIX socket | ||
| Poco::Net::SocketAddress local_address(socket_path); | ||
| Poco::Net::StreamSocket local_socket; | ||
| local_socket.connect(local_address); | ||
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| // The caller needs to be responsible for freeing the allocated memory | ||
| return new LocalSocketReply(std::move(local_socket), request, device); | ||
| // Create an HTTP client session with the local socket | ||
| Poco::Net::HTTPClientSession session(local_socket); | ||
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| // Create the request | ||
| Poco::Net::HTTPRequest request(method, "/" + request_path, Poco::Net::HTTPMessage::HTTP_1_1); | ||
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| // Set headers | ||
| for (const auto& header : headers) | ||
| { | ||
| request.set(header.first, header.second); | ||
| } | ||
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| // Create the HTMLForm and add parts | ||
| Poco::Net::HTMLForm form(Poco::Net::HTMLForm::ENCODING_MULTIPART); | ||
| for (const auto& part : parts) | ||
| { | ||
| form.addPart(part.first, part.second); // HTMLForm takes ownership of PartSource* | ||
| } | ||
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| // Prepare the request with the form | ||
| form.prepareSubmit(request); | ||
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| // Send the request | ||
| std::ostream& os = session.sendRequest(request); | ||
| form.write(os); | ||
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| // Receive the response | ||
| Poco::Net::HTTPResponse response; | ||
| std::istream& rs = session.receiveResponse(response); | ||
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| // Read the response data | ||
| QByteArray response_data; | ||
| char buffer[1024]; | ||
| while (rs.read(buffer, sizeof(buffer))) | ||
| { | ||
| response_data.append(buffer, rs.gcount()); | ||
| } | ||
| // Read any remaining bytes | ||
| if (rs.gcount() > 0) | ||
| { | ||
| response_data.append(buffer, rs.gcount()); | ||
| } | ||
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| return response_data; | ||
| } | ||
| else | ||
| catch (Poco::Exception& ex) | ||
| { | ||
| return QNetworkAccessManager::createRequest(operation, orig_request, device); | ||
| throw std::runtime_error("Failed to communicate over UNIX socket: " + ex.displayText()); | ||
| } | ||
| } | ||
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