Windows+Qt使用gRPC

時間 2019-11-15

標籤 windows+qt windows 使用 grpc 欄目 Windows 简体版

原文原文鏈接

上篇文章《Windows+VS2017使用gRPC》編譯出了Windows下可用的gRPC靜態lib庫文件，在此基礎上要想在Qt上使用，須要使用MSVC2017 64bit構建組件進行構建。html

grpc-server

新建基於Widget的Qt工程grpc-serverlinux

   Widget.h 
 

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   Widget.cpp 
 

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#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

新建基於Widget的Qt工程grpc-clientios

   Widget.h 
 

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#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 
 

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#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文件設置

添加預處理器定義：DEFINES += _WIN32_WINNT=0x0A00c++

添加連接庫以及包含庫：這裏直接複製過來了，一些冗餘的內容可根據實際狀況調整git

   *.pro 
 

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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

運行

參考

附錄

MinGW使用VS生成的靜態庫lib文件時，編譯不能經過，會提示：
error: No rule to make target '*.a', needed by '*.exe'. Stop.
可見它須要的時*.a的靜態庫文件，而沒法使用*.lib的靜態庫文件。
可是，MinGW調用linux生成的靜態庫.a文件，沒法連接成功，也沒法使用。
網上流傳着這樣的資料：
首先，下載安裝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」就能夠安裝好MSYS2.
而後運行msys2.exe腳本，執行以下命令：
一、pacman -Syu
二、執行完後，關閉終端，從新打開終端執行：pacman -Su
三、pacman -S git
四、pacman -S mingw-w64-i686-grpc
五、pacman -S mingw-w64-i686-qt5
六、pacman -S mingw-w64-i686-qt-creator
以後就能夠在安裝的qt creator中添加在msys2/mingw32/lib中的grpc靜態庫和protobuf靜態庫！！！而後本身根據官網編寫簡單的C++工程進行測試，只要你庫添加的沒問題，測試能夠經過。
可是，這個叫MSYS2的類Unix環境安裝軟件很慢，常常出現安裝不成功的問題，很很差使！github

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