Windows+Qt使用gRPC

上篇文章《Windows+VS2017使用gRPC》编译出了Windows下可用的gRPC静态lib库文件，在此基础上要想在Qt上使用，需要使用MSVC2017 64bit构建组件进行构建。

grpc-server

新建基于Widget的Qt工程grpc-server

Widget.h

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51

#ifndef WIDGET_H #define WIDGET_H #include <QWidget> #include <iostream> #include <memory> #include <string> #include <grpcpp/grpcpp.h> #include "../grpcSetting/helloworld.grpc.pb.h" using grpc::Server; using grpc::ServerBuilder; using grpc::ServerContext; using grpc::Status; using helloworld::HelloRequest; using helloworld::HelloReply; using helloworld::Greeter; // Logic and data behind the server's behavior. class GreeterServiceImpl final : public Greeter::Service {     Status SayHello(ServerContext *context, const HelloRequest *request,                     HelloReply *reply) override     {         std::string prefix("Hello ");         reply->set_message(prefix + request->name());         return Status::OK;     } }; class QTextBrowser; class Widget : public QWidget {     Q_OBJECT public:     Widget(QWidget *parent = nullptr);     ~Widget(); private slots:     void startServer(); private:     QTextBrowser *text; }; #endif // WIDGET_H

Widget.cpp

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49

#include "Widget.h" #include <QVBoxLayout> #include <QTextBrowser> #include <QPushButton> Widget::Widget(QWidget *parent)     : QWidget(parent)     , text(new QTextBrowser()) {     setWindowTitle(tr("grpc-server"));     resize(320, 460);     QVBoxLayout *layout = new QVBoxLayout(this);     QPushButton *button = new QPushButton("Start");     connect(button, &QPushButton::clicked, this, &Widget::startServer);     layout->addWidget(text);     layout->addWidget(button);     setLayout(layout); } Widget::~Widget() { } void Widget::startServer() {     std::string server_address("0.0.0.0:50051");     GreeterServiceImpl service;     ServerBuilder builder;     // Listen on the given address without any authentication mechanism.     builder.AddListeningPort(server_address, grpc::InsecureServerCredentials());     // Register "service" as the instance through which we'll communicate with     // clients. In this case it corresponds to an *synchronous* service.     builder.RegisterService(&service);     // Finally assemble the server.     std::unique_ptr<Server> server(builder.BuildAndStart());     std::cout << "Server listening on " << server_address << std::endl;     if (text != nullptr)     {         text->setText(QString(tr("Server listening on %1")).arg(server_address.c_str()));     }     // Wait for the server to shutdown. Note that some other thread must be     // responsible for shutting down the server for this call to ever return.     server->Wait(); }

grpc-client

新建基于Widget的Qt工程grpc-client

Widget.h

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79

#ifndef WIDGET_H #define WIDGET_H #include <QWidget> #include <iostream> #include <memory> #include <string> #include <grpcpp/grpcpp.h> #include "../grpcSetting/helloworld.grpc.pb.h" using grpc::Channel; using grpc::ClientContext; using grpc::Status; using helloworld::HelloRequest; using helloworld::HelloReply; using helloworld::Greeter; class GreeterClient { public:     GreeterClient(std::shared_ptr<Channel> channel)         : stub_(Greeter::NewStub(channel)) {}     // Assembles the client's payload, sends it and presents the response back     // from the server.     std::string SayHello(const std::string &user)     {         // Data we are sending to the server.         HelloRequest request;         request.set_name(user);         // Container for the data we expect from the server.         HelloReply reply;         // Context for the client. It could be used to convey extra information to         // the server and/or tweak certain RPC behaviors.         ClientContext context;         // The actual RPC.         Status status = stub_->SayHello(&context, request, &reply);         // Act upon its status.         if (status.ok())         {             return reply.message();         }         else         {             std::cout << status.error_code() << ": " << status.error_message()                       << std::endl;             return "RPC failed";         }     } private:     std::unique_ptr<Greeter::Stub> stub_; }; class QTextBrowser; class Widget : public QWidget {     Q_OBJECT public:     Widget(QWidget *parent = nullptr);     ~Widget(); private slots:     void req(); private:     QTextBrowser *text; }; #endif // WIDGET_H

Widget.cpp

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43

#include "Widget.h" #include <QVBoxLayout> #include <QTextBrowser> #include <QPushButton> Widget::Widget(QWidget *parent)     : QWidget(parent)     , text(new QTextBrowser()) {     setWindowTitle(tr("grpc-client"));     resize(320, 460);     QVBoxLayout *layout = new QVBoxLayout(this);     QPushButton *button = new QPushButton("req");     connect(button, &QPushButton::clicked, this, &Widget::req);     layout->addWidget(text);     layout->addWidget(button);     setLayout(layout); } Widget::~Widget() { } void Widget::req() {     // Instantiate the client. It requires a channel, out of which the actual RPCs     // are created. This channel models a connection to an endpoint (in this case,     // localhost at port 50051). We indicate that the channel isn't authenticated     // (use of InsecureChannelCredentials()).     GreeterClient greeter(grpc::CreateChannel(                               "localhost:50051", grpc::InsecureChannelCredentials()));     std::string user("world");     std::string reply = greeter.SayHello(user);     std::cout << "Greeter received: " << reply << std::endl;     if (text != nullptr)     {         text->setText(QString("Greeter received: %1").arg(reply.c_str()));     } }

Pro文件设置

添加预处理器定义：DEFINES += _WIN32_WINNT=0x0A00

添加链接库以及包含库：这里直接复制过来了，一些冗余的内容可根据实际情况调整

*.pro

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53

INCLUDEPATH += $$PWD/../../../grpc_plugs/grpc/include INCLUDEPATH += $$PWD/../../../grpc_plugs/grpc/third_party/protobuf/src DEPENDPATH += $$PWD/../../../grpc_plugs/grpc/include win32: LIBS += -L$$PWD/../../../grpc_plugs/grpc/.build/Debug/ -lgrpc++ win32:!win32-g++: PRE_TARGETDEPS += $$PWD/../../../grpc_plugs/grpc/.build/Debug/grpc++.lib else:win32-g++: PRE_TARGETDEPS += $$PWD/../../../grpc_plugs/grpc/.build/Debug/libgrpc++.a win32: LIBS += -L$$PWD/../../../grpc_plugs/grpc/.build/Debug/ -lgrpc win32:!win32-g++: PRE_TARGETDEPS += $$PWD/../../../grpc_plugs/grpc/.build/Debug/grpc.lib else:win32-g++: PRE_TARGETDEPS += $$PWD/../../../grpc_plugs/grpc/.build/Debug/libgrpc.a win32: LIBS += -L$$PWD/../../../grpc_plugs/grpc/.build/Debug/ -lgpr win32:!win32-g++: PRE_TARGETDEPS += $$PWD/../../../grpc_plugs/grpc/.build/Debug/gpr.lib else:win32-g++: PRE_TARGETDEPS += $$PWD/../../../grpc_plugs/grpc/.build/Debug/libgpr.a win32: LIBS += -L$$PWD/../../../grpc_plugs/grpc/.build/Debug/ -laddress_sorting win32:!win32-g++: PRE_TARGETDEPS += $$PWD/../../../grpc_plugs/grpc/.build/Debug/address_sorting.lib else:win32-g++: PRE_TARGETDEPS += $$PWD/../../../grpc_plugs/grpc/.build/Debug/libaddress_sorting.a win32: LIBS += -L$$PWD/../../../grpc_plugs/grpc/.build/third_party/protobuf/Debug -llibprotobufd win32:!win32-g++: PRE_TARGETDEPS += $$PWD/../../../grpc_plugs/grpc/.build/third_party/protobuf/Debug/libprotobufd.lib else:win32-g++: PRE_TARGETDEPS += $$PWD/../../../grpc_plugs/grpc/.build/third_party/protobuf/Debug/liblibprotobufd.a win32: LIBS += -L$$PWD/../../../grpc_plugs/grpc/.build/third_party/zlib/Debug -lzlibd win32:!win32-g++: PRE_TARGETDEPS += $$PWD/../../../grpc_plugs/grpc/.build/third_party/zlib/Debug/zlibd.lib else:win32-g++: PRE_TARGETDEPS += $$PWD/../../../grpc_plugs/grpc/.build/third_party/zlib/Debug/libzlibd.a win32: LIBS += -L'C:/Program Files (x86)/Windows Kits/10/Lib/10.0.17763.0/um/x64/' -lWS2_32 INCLUDEPATH += 'C:/Program Files (x86)/Windows Kits/10/Lib/10.0.17763.0/um/x64' DEPENDPATH += 'C:/Program Files (x86)/Windows Kits/10/Lib/10.0.17763.0/um/x64' win32:!win32-g++: PRE_TARGETDEPS += 'C:/Program Files (x86)/Windows Kits/10/Lib/10.0.17763.0/um/x64/WS2_32.lib' else:win32-g++: PRE_TARGETDEPS += 'C:/Program Files (x86)/Windows Kits/10/Lib/10.0.17763.0/um/x64/libWS2_32.a' win32: LIBS += -L'C:/Program Files (x86)/Windows Kits/10/Lib/10.0.17763.0/um/x64/' -lAdvapi32 INCLUDEPATH += 'C:/Program Files (x86)/Windows Kits/10/Lib/10.0.17763.0/um/x64' DEPENDPATH += 'C:/Program Files (x86)/Windows Kits/10/Lib/10.0.17763.0/um/x64' win32:!win32-g++: PRE_TARGETDEPS += 'C:/Program Files (x86)/Windows Kits/10/Lib/10.0.17763.0/um/x64/Advapi32.lib' else:win32-g++: PRE_TARGETDEPS += 'C:/Program Files (x86)/Windows Kits/10/Lib/10.0.17763.0/um/x64/libAdvapi32.a' win32: LIBS += -L$$PWD/../../../grpc_plugs/grpc/.build/third_party/cares/cares/lib/Debug/ -lcares INCLUDEPATH += $$PWD/../../../grpc_plugs/grpc/.build/third_party/cares/cares/lib/Debug DEPENDPATH += $$PWD/../../../grpc_plugs/grpc/.build/third_party/cares/cares/lib/Debug win32:!win32-g++: PRE_TARGETDEPS += $$PWD/../../../grpc_plugs/grpc/.build/third_party/cares/cares/lib/Debug/cares.lib else:win32-g++: PRE_TARGETDEPS += $$PWD/../../../grpc_plugs/grpc/.build/third_party/cares/cares/lib/Debug/libcares.a

运行

参考

• Qt使用GRPC之grpc安装（一）
• Qt使用GRPC之grpc安装（二）
• https://github.com/grpc/grpc/blob/master/BUILDING.md#user-content-windows
• grpc1.18.0 c++ windows visual studio 2017(vs2017)版本编译（入门）
• grpc1.18.0 c++ windows visual studio 2017(vs2017)版本Helloworld示例与解析

附录

MinGW使用VS生成的静态库lib文件时，编译不能通过，会提示：
error: No rule to make target '*.a', needed by '*.exe'. Stop.
可见它需要的时*.a的静态库文件，而无法使用*.lib的静态库文件。
但是，MinGW调用linux生成的静态库.a文件，无法链接成功，也无法使用。
网上流传着这样的资料：
首先，下载安装MSYS2：http://www.msys2.org/
（Download and run the installer - "x86_64" for 64-bit, "i686" for 32-bit Windows）
一路“下一步”就可以安装好MSYS2.
然后运行msys2.exe脚本，执行如下命令：
1、pacman -Syu
2、执行完后，关闭终端，重新打开终端执行：pacman -Su
3、pacman -S git
4、pacman -S mingw-w64-i686-grpc
5、pacman -S mingw-w64-i686-qt5
6、pacman -S mingw-w64-i686-qt-creator
之后就可以在安装的qt creator中添加在msys2/mingw32/lib中的grpc静态库和protobuf静态库！！！然后自己根据官网编写简单的C++工程进行测试，只要你库添加的没问题，测试可以通过。
但是，这个叫MSYS2的类Unix环境安装软件很慢，经常出现安装不成功的问题，很不好使！