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