pistache（C++ REST 工具） 使用

项目不完善，使用需谨慎

相关资料
github
homepage / document

目前因为资料还是不是很多，所以最好的学习资料应该就是在github项目主页上挂着的各种实例了～

这里我将代码克隆了下来，用tree命令打印了一下目录：

host@lab:~/scode/pistache$ tree -d -L 2.├── build│   ├── CMakeFiles│   ├── examples│   ├── googletest-release-1.7.0│   ├── src│   └── tests├── examples   # 官方实例的目录├── googletest-release-1.7.0│   ├── build-aux│   ├── cmake│   ├── codegear│   ├── include│   ├── m4│   ├── make│   ├── msvc│   ├── samples│   ├── scripts│   ├── src│   ├── test│   └── xcode├── include│   └── serializer├── src│   ├── client│   ├── common│   └── server└── tests

这里贴出一个实例，顺便注释一下，给大家一个参考：

#include "http.h"#include "router.h"#include "endpoint.h"#include <algorithm>using namespace std;using namespace Net;void printCookies(const Net::Http::Request &req){  auto cookies = req.cookies();  # 获取cookies  std::cout << "Cookies: [" << std::endl;  const std::string indent(4, ' ');  # ' ' * 4 = '    '  for(const auto &c: cookies){    std::cout << indent << c.name << " = " << c.value << std::endl;  }  std::cout << "]" << std::endl;}namespace Generic{void handleReady(const Rest::Request &, Http::ResponseWriter response){  response.send(Http::Code::Ok, "1");}}class StatsEndpoint{public:  StatsEndpoint(Net::Address addr)      : httpEndpoint(std::make_shared<Net::Http::Endpoint>(addr)){}  void init(size_t thr = 2){    auto opts = Net::Http::Endpoint::options()        .threads(thr)        .flags(Net::Tcp::Options::InstallSignalHandler);    httpEndpoint->init(opts);    setupRoutes();  }  void start(){    httpEndpoint->setHandler(router.handler());    httpEndpoint->serve();  }  void shutdown(){    httpEndpoint->shutdown();  }private:  void setupRoutes(){    using namespace Net::Rest;    Routes::Post(router, "/record/:name/:value?",                 Routes::bind(&StatsEndpoint::doRecordMetric, this));  # bind    Routes::Get(router,                "/value/:name", Routes::bind(&StatsEndpoint::doGetMetric, this));    Routes::Get(router,                "/ready", Routes::bind(&Generic::handleReady));    Routes::Get(router,                "/auth", Routes::bind(&StatsEndpoint::doAuth, this));  }  void doRecordMetric(const Rest::Request &request, Net::Http::ResponseWriter response){    auto name = request.param(":name").as<std::string>();    Guard guard(metricsLock); // 加锁    auto it = std::find_if(metrics.begin(),                           metrics.end(),                           [&](const Metric &metric){      return metric.name() == name;    });    int val = 1;    if(request.hasParam(":value")){      auto value = request.param(":value");      val = value.as<int>();    }    if(it == std::end(metrics)){      metrics.push_back(Metric(std::move(name), val));      response.send(Http::Code::Created, std::to_string(val));    }else{      auto &metric = *it;      metric.incr(val);      response.send(Http::Code::Ok, std::to_string(metric.value()));    }  }  void doGetMetric(const Rest::Request &request, Net::Http::ResponseWriter response){    auto name = request.param(":name").as<std::string>();    Guard guard(metricsLock);    auto it = std::find_if(metrics.begin(), metrics.end(), [&](const Metric &metric){      return metric.name() == name;    });    if(it == std::end(metrics)){      response.send(Http::Code::Not_Found, "Metric does not exist");    }else{      const auto &metric = *it;      response.send(Http::Code::Ok, std::to_string(metric.value()));    }  }  void doAuth(const Rest::Request &request, Net::Http::ResponseWriter response){    printCookies(request);    response.cookies()        .add(Http::Cookie("lang", "en-US"));    response.send(Http::Code::Ok);  }  class Metric{  public:    Metric(std::string name, int initialValue = 1)        : name_(std::move(name)), value_(initialValue){}    int incr(int n = 1){      int old = value_;      value_ += n;      return old;    }    int value() const{      return value_;    }    std::string name() const{      return name_;    }  private:    std::string name_;    int value_;  };  typedef std::mutex Lock;  typedef std::lock_guard<Lock> Guard;  Lock metricsLock;  std::vector<Metric> metrics;  std::shared_ptr<Net::Http::Endpoint> httpEndpoint;  Rest::Router router;};int main(int argc, char *argv[]){  Net::Port port(9080);  int thr = 2;  if(argc >= 2){    port = std::stol(argv[1]);    if(argc == 3)      thr = std::stol(argv[2]);  }  Net::Address addr(Net::Ipv4::any(), port);  cout << "Cores = " << hardware_concurrency() << endl;  cout << "Using " << thr << " threads" << endl;  StatsEndpoint stats(addr);  stats.init(thr);  stats.start();  stats.shutdown();}