显示api返回数据中的特定数据,C++;卡萨布兰卡休息酒店 我是C++和Visual C++的新手,使用CPPRESTSDK Aka Casabraca访问API。
我在github上学习了教程,并能够在终端中显示返回数据 但我不知道如何显示特定的数据。返回数据为json格式 这是我的代码:显示api返回数据中的特定数据,C++;卡萨布兰卡休息酒店 我是C++和Visual C++的新手,使用CPPRESTSDK Aka Casabraca访问API。,c++,visual-c++,casablanca,cpprest-sdk,C++,Visual C++,Casablanca,Cpprest Sdk,我在github上学习了教程,并能够在终端中显示返回数据 但我不知道如何显示特定的数据。返回数据为json格式 这是我的代码: #include "stdafx.h" #include <iostream> #include <cpprest/http_client.h> #include <cpprest/filestream.h> //using namespace std; using namespace utility;
#include "stdafx.h"
#include <iostream>
#include <cpprest/http_client.h>
#include <cpprest/filestream.h>
//using namespace std;
using namespace utility; // Common utilities like string conversions
using namespace web; // Common features like URIs.
using namespace web::http; // Common HTTP functionality
using namespace web::http::client; // HTTP client features
using namespace concurrency::streams; // Asynchronous streams
int main(int argc, char* argv[])
{
auto fileStream = std::make_shared<ostream>();
// Open stream to output file.
pplx::task<void> requestTask = fstream::open_ostream(U("results.html")).then([=](ostream outFile)
{
*fileStream = outFile;
// Create http_client to send the request.
http_client client(U("http://192.168.0.13:3000/api/individual_employment_setting/detail/172"));
// Build request URI and start the request.
//uri_builder builder(U("/search"));
//builder.append_query(U("q"), U("cpprestsdk github"));
return client.request(methods::GET);
})
// Handle response headers arriving.
.then([=](http_response response)
{
printf("Received response status code:%u\n", response.status_code());
// Write response body into the file.
// return response.body().read_to_end(fileStream->streambuf());
stringstreambuf buffer;
response.body().read_to_end(buffer).get();
printf("Response body: \n %s", buffer.collection().c_str());
return fileStream->print(buffer.collection()); //write to file anyway
})
// Close the file stream.
.then([=](size_t)
{
return fileStream->close();
});
// Wait for all the outstanding I/O to complete and handle any exceptions
try
{
requestTask.wait();
}
catch (const std::exception &e)
{
printf("Error exception:%s\n", e.what());
}
return 0;
}
定义一个
web::json::value
变量,从响应中获取json响应
web::json::value response;
现在,一旦请求返回响应并且返回代码为OK
,那么您就可以使用extract_json()
从中提取json。像这样的
.then([&response](http_response _response){
if (_response.status_code() == web::http::status_codes::OK) {
response = _response.extract_json().get();
}
}
现在,您应该能够使用
response.as_object()
或auto id=response[L“data”][L“_id”].as_string()对response
执行json
操作代码>等等。您好,先生,我试图将自动id=响应[L“数据”][L“id”]输出为字符串();在控制台中,但它不显示任何数据。response[L“data”][L“\u id”]。as\u string()
转换为STLstring
。尝试使用.c_str()
和std::wcout进行输出
.then([&response](http_response _response){
if (_response.status_code() == web::http::status_codes::OK) {
response = _response.extract_json().get();
}
}