#include <curl/curl.h>

int main(void) {
  CURL *curl = curl_easy_init();
  if (curl) {
    curl_easy_setopt(curl, CURLOPT_URL, "https://api.gugudata.com/stock/cn/trade_calendar?appkey=YOUR_APPKEY");
    curl_easy_setopt(curl, CURLOPT_CUSTOMREQUEST, "GET");
    curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, 1L);
    CURLcode res = curl_easy_perform(curl);
    (void)res;
    curl_easy_cleanup(curl);
  }
  return 0;
}

using System;
using System.Collections.Generic;
using System.IO;
using System.Net.Http;

var client = new HttpClient();
var request = new HttpRequestMessage(HttpMethod.Get, "https://api.gugudata.com/stock/cn/trade_calendar?appkey=YOUR_APPKEY");
var response = client.SendAsync(request).Result;
Console.WriteLine(response.Content.ReadAsStringAsync().Result);

package main

import (
  "fmt"
  "io"
  "net/http"
)

func main() {
  url := "https://api.gugudata.com/stock/cn/trade_calendar?appkey=YOUR_APPKEY"
  req, err := http.NewRequest("GET", url, nil)
  if err != nil {
    fmt.Println(err)
    return
  }
  res, err := http.DefaultClient.Do(req)
  if err != nil {
    fmt.Println(err)
    return
  }
  defer res.Body.Close()
  body, err := io.ReadAll(res.Body)
  if err != nil {
    fmt.Println(err)
    return
  }
  fmt.Println(string(body))
}

OkHttpClient client = new OkHttpClient().newBuilder().build();
Request request = new Request.Builder()
  .url("https://api.gugudata.com/stock/cn/trade_calendar?appkey=YOUR_APPKEY")
  .method("GET", null)
  .build();
Response response = client.newCall(request).execute();
System.out.println(response.body().string());

$.ajax({
  url: "https://api.gugudata.com/stock/cn/trade_calendar?appkey=YOUR_APPKEY",
  method: "GET",
}).done(function (response) {
  console.log(response);
});

const https = require("node:https");

const url = "https://api.gugudata.com/stock/cn/trade_calendar?appkey=YOUR_APPKEY";
const request = https.request(url, { method: "GET" }, handleResponse);
request.on("error", console.error);
request.end();

function handleResponse(response) {
  const chunks = [];
  response.on("data", function (chunk) {
    chunks.push(chunk);
  });
  response.on("end", function () {
    console.log(Buffer.concat(chunks).toString("utf8"));
  });
}

#import <Foundation/Foundation.h>

NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:@"https://api.gugudata.com/stock/cn/trade_calendar?appkey=YOUR_APPKEY"]];
[request setHTTPMethod:@"GET"];
NSURLSessionDataTask *task = [[NSURLSession sharedSession] dataTaskWithRequest:request completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {
  if (error) {
    NSLog(@"%@", error);
    return;
  }
  NSLog(@"%@", [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding]);
}];
[task resume];

<?php
$curl = curl_init();
curl_setopt_array($curl, array(
  CURLOPT_URL => "https://api.gugudata.com/stock/cn/trade_calendar?appkey=YOUR_APPKEY",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_FOLLOWLOCATION => true,
  CURLOPT_CUSTOMREQUEST => "GET",
));
$response = curl_exec($curl);
curl_close($curl);
echo $response;

import requests

url = "https://api.gugudata.com/stock/cn/trade_calendar?appkey=YOUR_APPKEY"
response = requests.request("GET", url)
print(response.text)

require "uri"
require "net/http"

url = URI("https://api.gugudata.com/stock/cn/trade_calendar?appkey=YOUR_APPKEY")
https = Net::HTTP.new(url.host, url.port)
https.use_ssl = true
request = Net::HTTP::Get.new(url)
response = https.request(request)
puts response.read_body

import Foundation

let semaphore = DispatchSemaphore(value: 0)
var request = URLRequest(url: URL(string: "https://api.gugudata.com/stock/cn/trade_calendar?appkey=YOUR_APPKEY")!, timeoutInterval: .infinity)
request.httpMethod = "GET"
let task = URLSession.shared.dataTask(with: request) { data, response, error in
  defer { semaphore.signal() }
  guard let data = data else {
    print(String(describing: error))
    return
  }
  print(String(data: data, encoding: .utf8)!)
}
task.resume()
semaphore.wait()