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Add dart specific support for realm_http_transport_new
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../src/realm_dart_http_transport.h |
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//////////////////////////////////////////////////////////////////////////////// | ||
// | ||
// Copyright 2022 Realm Inc. | ||
// | ||
// Licensed under the Apache License, Version 2.0 (the "License"); | ||
// you may not use this file except in compliance with the License. | ||
// You may obtain a copy of the License at | ||
// | ||
// http://www.apache.org/licenses/LICENSE-2.0 | ||
// | ||
// Unless required by applicable law or agreed to in writing, software | ||
// distributed under the License is distributed on an "AS IS" BASIS, | ||
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
// See the License for the specific language governing permissions and | ||
// limitations under the License. | ||
// | ||
//////////////////////////////////////////////////////////////////////////////// | ||
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#include "realm_dart_http_transport.h" | ||
#include "dart_api_dl.h" | ||
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struct HandleScope { | ||
HandleScope() { | ||
Dart_EnterScope_DL(); | ||
} | ||
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~HandleScope() { | ||
Dart_ExitScope_DL(); | ||
} | ||
}; | ||
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class RequestCallbackData { | ||
static void finalize_handle(void* isolate_callback_data, void* peer) { | ||
auto request_callback_data = static_cast<RequestCallbackData*>(peer); | ||
request_callback_data->delete_handle(); | ||
} | ||
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void delete_handle() { | ||
if (m_handle) { | ||
Dart_DeleteWeakPersistentHandle_DL(m_handle); | ||
m_handle = nullptr; | ||
} | ||
} | ||
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public: | ||
RequestCallbackData(Dart_Handle handle, realm_dart_http_request_func_t callback) | ||
: m_handle(Dart_NewWeakPersistentHandle_DL(handle, nullptr, 1, finalize_handle)), m_callback(callback) | ||
{} | ||
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~RequestCallbackData() { | ||
delete_handle(); | ||
} | ||
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void callback(const realm_http_request_t request, void* request_context) { | ||
if (m_handle) { | ||
HandleScope scope; | ||
auto handle = Dart_HandleFromWeakPersistent_DL(m_handle); | ||
m_callback(handle, request, request_context); | ||
} | ||
} | ||
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private: | ||
Dart_WeakPersistentHandle m_handle; | ||
realm_dart_http_request_func_t m_callback; | ||
}; | ||
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void free_request_callback_data(void* userdata) { | ||
auto request_callback_data = static_cast<RequestCallbackData*>(userdata); | ||
delete request_callback_data; | ||
} | ||
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void on_request_callback( | ||
void* userdata, | ||
const realm_http_request_t request, | ||
void* request_context) | ||
{ | ||
auto request_callback_data = static_cast<RequestCallbackData*>(userdata); | ||
request_callback_data->callback(request, request_context); | ||
} | ||
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RLM_API realm_http_transport_t* realm_dart_http_transport_new( | ||
realm_dart_http_request_func_t request_callback, | ||
Dart_Handle userdata) | ||
{ | ||
auto request_callback_data = new RequestCallbackData(userdata, request_callback); | ||
return realm_http_transport_new(on_request_callback, request_callback_data, free_request_callback_data); | ||
} |
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//////////////////////////////////////////////////////////////////////////////// | ||
// | ||
// Copyright 2022 Realm Inc. | ||
// | ||
// Licensed under the Apache License, Version 2.0 (the "License"); | ||
// you may not use this file except in compliance with the License. | ||
// You may obtain a copy of the License at | ||
// | ||
// http://www.apache.org/licenses/LICENSE-2.0 | ||
// | ||
// Unless required by applicable law or agreed to in writing, software | ||
// distributed under the License is distributed on an "AS IS" BASIS, | ||
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
// See the License for the specific language governing permissions and | ||
// limitations under the License. | ||
// | ||
//////////////////////////////////////////////////////////////////////////////// | ||
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#ifndef REALM_DART_HTTP_TRANSPORT_H | ||
#define REALM_DART_HTTP_TRANSPORT_H | ||
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#include "realm.h" | ||
#include "dart_api_dl.h" | ||
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/** | ||
* Callback function used by Core to make a HTTP request. | ||
* | ||
* Complete the request by calling realm_dart_http_transport_complete_request(), | ||
* passing in the request_context pointer here and the received response. | ||
* Network request are expected to be asynchronous and can be completed on any thread. | ||
* | ||
* @param userdata The userdata pointer passed to realm_dart_http_transport_new(). | ||
* @param request The request to send. | ||
* @param request_context Internal state pointer of Core, needed by realm_http_transport_complete_request(). | ||
*/ | ||
typedef void (*realm_dart_http_request_func_t)(Dart_Handle userdata, const realm_http_request_t request, void* request_context); | ||
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/** | ||
* Create a new HTTP transport with these callbacks implementing its functionality. | ||
* | ||
* This is a dart specific wrapper for realm_http_transport_new. | ||
*/ | ||
RLM_API realm_http_transport_t* realm_dart_http_transport_new(realm_dart_http_request_func_t request_callback, | ||
Dart_Handle userdata); | ||
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#endif |