| /* |
| * |
| * Copyright 2015, Google Inc. |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are |
| * met: |
| * |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * * Redistributions in binary form must reproduce the above |
| * copyright notice, this list of conditions and the following disclaimer |
| * in the documentation and/or other materials provided with the |
| * distribution. |
| * * Neither the name of Google Inc. nor the names of its |
| * contributors may be used to endorse or promote products derived from |
| * this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| * |
| */ |
| |
| // Generates a Python gRPC service interface out of Protobuf IDL. |
| |
| #include <cstring> |
| #include <memory> |
| #include <string> |
| #include <tuple> |
| |
| #include "src/compiler/python_generator.h" |
| #include <google/protobuf/compiler/code_generator.h> |
| #include <google/protobuf/compiler/plugin.h> |
| #include <google/protobuf/io/coded_stream.h> |
| #include <google/protobuf/io/zero_copy_stream.h> |
| #include <google/protobuf/descriptor.h> |
| |
| using google::protobuf::FileDescriptor; |
| using google::protobuf::compiler::CodeGenerator; |
| using google::protobuf::compiler::GeneratorContext; |
| using google::protobuf::compiler::PluginMain; |
| using google::protobuf::io::CodedOutputStream; |
| using google::protobuf::io::ZeroCopyOutputStream; |
| using std::string; |
| using std::strlen; |
| |
| class PythonGrpcGenerator : public CodeGenerator { |
| public: |
| PythonGrpcGenerator() {} |
| ~PythonGrpcGenerator() {} |
| |
| bool Generate(const FileDescriptor* file, const string& parameter, |
| GeneratorContext* context, string* error) const { |
| // Get output file name. |
| string file_name; |
| static const int proto_suffix_length = strlen(".proto"); |
| if (file->name().size() > static_cast<size_t>(proto_suffix_length) && |
| file->name().find_last_of(".proto") == file->name().size() - 1) { |
| file_name = file->name().substr( |
| 0, file->name().size() - proto_suffix_length) + "_pb2.py"; |
| } else { |
| *error = "Invalid proto file name. Proto file must end with .proto"; |
| return false; |
| } |
| |
| std::unique_ptr<ZeroCopyOutputStream> output( |
| context->OpenForInsert(file_name, "module_scope")); |
| CodedOutputStream coded_out(output.get()); |
| bool success = false; |
| string code = ""; |
| tie(success, code) = grpc_python_generator::GetServices(file); |
| if (success) { |
| coded_out.WriteRaw(code.data(), code.size()); |
| return true; |
| } else { |
| return false; |
| } |
| } |
| }; |
| |
| int main(int argc, char* argv[]) { |
| PythonGrpcGenerator generator; |
| return PluginMain(argc, argv, &generator); |
| } |