Tutto quello che serve per collegare l'API.

curl -X POST "https://www.qrcodegenerate.it/api/v1/qrcode/generate-static" \
  -H "Content-Type: application/json" \
  -H "x-api-key: LA_TUA_API_KEY" \
  --output qrcode.png \
  -d '{
    "content": "https://www.tuosito.it",
    "format": "png",
    "size": 300,
    "color": {
      "dark": "#000000",
      "light": "#ffffff"
    }
  }'

import { writeFile } from "node:fs/promises";

const apiKey = process.env.QRCODEGENERATE_API_KEY;
const endpoint = "https://www.qrcodegenerate.it/api/v1/qrcode/generate-static";

if (!apiKey) {
  throw new Error("Variabile QRCODEGENERATE_API_KEY mancante");
}

const response = await fetch(endpoint, {
  method: "POST",
  headers: {
    "Content-Type": "application/json",
    "x-api-key": apiKey
  },
  body: JSON.stringify({
    content: "https://www.tuosito.it",
    format: "png",
    size: 300,
    color: {
      dark: "#000000",
      light: "#ffffff"
    }
  })
});

if (!response.ok) {
  const errorBody = await response.text();
  throw new Error(`Errore API ${response.status}: ${errorBody}`);
}

const buffer = Buffer.from(await response.arrayBuffer());
await writeFile("qrcode.png", buffer);
console.log("QR Code salvato in qrcode.png");

import { writeFile } from "node:fs/promises";

const apiKey = process.env.QRCODEGENERATE_API_KEY;
const endpoint = new URL("https://www.qrcodegenerate.it/api/v1/qrcode/generate-static");

endpoint.searchParams.set("content", "https://www.tuosito.it");
endpoint.searchParams.set("format", "svg");
endpoint.searchParams.set("size", "300");
endpoint.searchParams.set("color[dark]", "#000000");
endpoint.searchParams.set("color[light]", "#ffffff");

const response = await fetch(endpoint, {
  method: "GET",
  headers: {
    "x-api-key": apiKey
  }
});

if (!response.ok) {
  const errorBody = await response.text();
  throw new Error(`Errore API ${response.status}: ${errorBody}`);
}

const svg = await response.text();
await writeFile("qrcode.svg", svg, "utf8");
console.log("QR Code SVG salvato in qrcode.svg");

import os
import requests

api_key = os.environ.get("QRCODEGENERATE_API_KEY")
endpoint = "https://www.qrcodegenerate.it/api/v1/qrcode/generate-static"

if not api_key:
    raise RuntimeError("Variabile QRCODEGENERATE_API_KEY mancante")

payload = {
    "content": "https://www.tuosito.it",
    "format": "png",
    "size": 300,
    "color": {
        "dark": "#000000",
        "light": "#ffffff"
    }
}

response = requests.post(
    endpoint,
    headers={"x-api-key": api_key},
    json=payload,
    timeout=30
)

if not response.ok:
    raise RuntimeError(f"Errore API {response.status_code}: {response.text}")

with open("qrcode.png", "wb") as file:
    file.write(response.content)

print("QR Code salvato in qrcode.png")

<?php
$apiKey = getenv('QRCODEGENERATE_API_KEY');
$endpoint = 'https://www.qrcodegenerate.it/api/v1/qrcode/generate-static';

if (!$apiKey) {
    throw new RuntimeException('Variabile QRCODEGENERATE_API_KEY mancante');
}

$payload = json_encode([
    'content' => 'https://www.tuosito.it',
    'format' => 'png',
    'size' => 300,
    'color' => [
        'dark' => '#000000',
        'light' => '#ffffff'
    ]
]);

$ch = curl_init($endpoint);
curl_setopt_array($ch, [
    CURLOPT_POST => true,
    CURLOPT_HTTPHEADER => [
        'Content-Type: application/json',
        'x-api-key: ' . $apiKey
    ],
    CURLOPT_POSTFIELDS => $payload,
    CURLOPT_RETURNTRANSFER => true,
    CURLOPT_TIMEOUT => 30
]);

$response = curl_exec($ch);
$statusCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);

if ($response === false) {
    throw new RuntimeException(curl_error($ch));
}

curl_close($ch);

if ($statusCode < 200 || $statusCode >= 300) {
    throw new RuntimeException('Errore API ' . $statusCode . ': ' . $response);
}

file_put_contents('qrcode.png', $response);
echo 'QR Code salvato in qrcode.png';

import { writeFile } from "node:fs/promises";

const apiKey = process.env.QRCODEGENERATE_API_KEY;
const endpoint = "https://www.qrcodegenerate.it/api/v1/qrcode/generate-static";

if (!apiKey) {
  throw new Error("Variabile QRCODEGENERATE_API_KEY mancante");
}

const payload = {
  content: "https://www.tuosito.it",
  format: "png",
  size: 300,
  color: {
    dark: "#000000",
    light: "#ffffff"
  }
};

const response = await fetch(endpoint, {
  method: "POST",
  headers: {
    "Content-Type": "application/json",
    "x-api-key": apiKey
  },
  body: JSON.stringify(payload)
});

if (!response.ok) {
  const errorBody = await response.text();
  throw new Error(`Errore API ${response.status}: ${errorBody}`);
}

const fileBuffer = Buffer.from(await response.arrayBuffer());
await writeFile("qrcode.png", fileBuffer);

require "net/http"
require "json"
require "uri"

api_key = ENV["QRCODEGENERATE_API_KEY"]
endpoint = URI("https://www.qrcodegenerate.it/api/v1/qrcode/generate-static")

raise "Variabile QRCODEGENERATE_API_KEY mancante" if api_key.to_s.empty?

request = Net::HTTP::Post.new(endpoint)
request["Content-Type"] = "application/json"
request["x-api-key"] = api_key
request.body = {
  content: "https://www.tuosito.it",
  format: "png",
  size: 300,
  color: {
    dark: "#000000",
    light: "#ffffff"
  }
}.to_json

response = Net::HTTP.start(endpoint.hostname, endpoint.port, use_ssl: endpoint.scheme == "https") do |http|
  http.request(request)
end

unless response.is_a?(Net::HTTPSuccess)
  raise "Errore API #{response.code}: #{response.body}"
end

File.binwrite("qrcode.png", response.body)
puts "QR Code salvato in qrcode.png"

import Foundation

@main
struct GenerateQrCode {
    static func main() async throws {
        let apiKey = ProcessInfo.processInfo.environment["QRCODEGENERATE_API_KEY"] ?? ""
        guard !apiKey.isEmpty else {
            fatalError("Variabile QRCODEGENERATE_API_KEY mancante")
        }

        let endpoint = URL(string: "https://www.qrcodegenerate.it/api/v1/qrcode/generate-static")!
        var request = URLRequest(url: endpoint)
        request.httpMethod = "POST"
        request.setValue("application/json", forHTTPHeaderField: "Content-Type")
        request.setValue(apiKey, forHTTPHeaderField: "x-api-key")

        let payload: [String: Any] = [
            "content": "https://www.tuosito.it",
            "format": "png",
            "size": 300,
            "color": [
                "dark": "#000000",
                "light": "#ffffff"
            ]
        ]

        request.httpBody = try JSONSerialization.data(withJSONObject: payload)

        let (data, response) = try await URLSession.shared.data(for: request)
        guard let httpResponse = response as? HTTPURLResponse,
              (200...299).contains(httpResponse.statusCode) else {
            let body = String(data: data, encoding: .utf8) ?? ""
            throw NSError(domain: "QRCodeGenerate", code: 1, userInfo: [NSLocalizedDescriptionKey: body])
        }

        try data.write(to: URL(fileURLWithPath: "qrcode.png"))
        print("QR Code salvato in qrcode.png")
    }
}

package main

import (
    "bytes"
    "encoding/json"
    "fmt"
    "io"
    "net/http"
    "os"
)

func main() {
    apiKey := os.Getenv("QRCODEGENERATE_API_KEY")
    if apiKey == "" {
        panic("Variabile QRCODEGENERATE_API_KEY mancante")
    }

    payload := map[string]interface{}{
        "content": "https://www.tuosito.it",
        "format":  "png",
        "size":    300,
        "color": map[string]string{
            "dark":  "#000000",
            "light": "#ffffff",
        },
    }

    body, err := json.Marshal(payload)
    if err != nil {
        panic(err)
    }

    req, err := http.NewRequest("POST", "https://www.qrcodegenerate.it/api/v1/qrcode/generate-static", bytes.NewReader(body))
    if err != nil {
        panic(err)
    }

    req.Header.Set("Content-Type", "application/json")
    req.Header.Set("x-api-key", apiKey)

    resp, err := http.DefaultClient.Do(req)
    if err != nil {
        panic(err)
    }
    defer resp.Body.Close()

    if resp.StatusCode < 200 || resp.StatusCode >= 300 {
        errorBody, _ := io.ReadAll(resp.Body)
        panic(fmt.Sprintf("Errore API %d: %s", resp.StatusCode, string(errorBody)))
    }

    file, err := os.Create("qrcode.png")
    if err != nil {
        panic(err)
    }
    defer file.Close()

    if _, err := io.Copy(file, resp.Body); err != nil {
        panic(err)
    }

    fmt.Println("QR Code salvato in qrcode.png")
}

#include <curl/curl.h>
#include <cstdio>
#include <cstdlib>
#include <iostream>
#include <string>

int main() {
    const char* apiKeyEnv = std::getenv("QRCODEGENERATE_API_KEY");
    if (apiKeyEnv == nullptr) {
        std::cerr << "Variabile QRCODEGENERATE_API_KEY mancante" << std::endl;
        return 1;
    }

    FILE* output = std::fopen("qrcode.png", "wb");
    if (!output) {
        std::cerr << "Impossibile creare qrcode.png" << std::endl;
        return 1;
    }

    CURL* curl = curl_easy_init();
    if (!curl) {
        std::fclose(output);
        return 1;
    }

    std::string apiHeader = std::string("x-api-key: ") + apiKeyEnv;
    struct curl_slist* headers = nullptr;
    headers = curl_slist_append(headers, "Content-Type: application/json");
    headers = curl_slist_append(headers, apiHeader.c_str());

    const char* payload = R"json({
        "content": "https://www.tuosito.it",
        "format": "png",
        "size": 300,
        "color": {
            "dark": "#000000",
            "light": "#ffffff"
        }
    })json";

    curl_easy_setopt(curl, CURLOPT_URL, "https://www.qrcodegenerate.it/api/v1/qrcode/generate-static");
    curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headers);
    curl_easy_setopt(curl, CURLOPT_POSTFIELDS, payload);
    curl_easy_setopt(curl, CURLOPT_WRITEDATA, output);

    CURLcode result = curl_easy_perform(curl);
    if (result != CURLE_OK) {
        std::cerr << curl_easy_strerror(result) << std::endl;
    }

    curl_slist_free_all(headers);
    curl_easy_cleanup(curl);
    std::fclose(output);

    return result == CURLE_OK ? 0 : 1;
}

using System.Text;

var apiKey = Environment.GetEnvironmentVariable("QRCODEGENERATE_API_KEY");
if (string.IsNullOrWhiteSpace(apiKey))
{
    throw new InvalidOperationException("Variabile QRCODEGENERATE_API_KEY mancante");
}

var endpoint = "https://www.qrcodegenerate.it/api/v1/qrcode/generate-static";
var json = """
{
  "content": "https://www.tuosito.it",
  "format": "png",
  "size": 300,
  "color": {
    "dark": "#000000",
    "light": "#ffffff"
  }
}
""";

using var client = new HttpClient();
using var request = new HttpRequestMessage(HttpMethod.Post, endpoint);
request.Headers.Add("x-api-key", apiKey);
request.Content = new StringContent(json, Encoding.UTF8, "application/json");

using var response = await client.SendAsync(request);
var body = await response.Content.ReadAsByteArrayAsync();

if (!response.IsSuccessStatusCode)
{
    var errorText = Encoding.UTF8.GetString(body);
    throw new Exception($"Errore API {(int)response.StatusCode}: {errorText}");
}

await File.WriteAllBytesAsync("qrcode.png", body);
Console.WriteLine("QR Code salvato in qrcode.png");

import java.net.URI;
import java.net.http.HttpClient;
import java.net.http.HttpRequest;
import java.net.http.HttpResponse;
import java.nio.file.Files;
import java.nio.file.Path;

public class GenerateQrCode {
    public static void main(String[] args) throws Exception {
        String apiKey = System.getenv("QRCODEGENERATE_API_KEY");
        if (apiKey == null || apiKey.isBlank()) {
            throw new IllegalStateException("Variabile QRCODEGENERATE_API_KEY mancante");
        }

        String json = """
        {
          "content": "https://www.tuosito.it",
          "format": "png",
          "size": 300,
          "color": {
            "dark": "#000000",
            "light": "#ffffff"
          }
        }
        """;

        HttpRequest request = HttpRequest.newBuilder()
            .uri(URI.create("https://www.qrcodegenerate.it/api/v1/qrcode/generate-static"))
            .header("Content-Type", "application/json")
            .header("x-api-key", apiKey)
            .POST(HttpRequest.BodyPublishers.ofString(json))
            .build();

        HttpResponse<byte[]> response = HttpClient.newHttpClient()
            .send(request, HttpResponse.BodyHandlers.ofByteArray());

        if (response.statusCode() < 200 || response.statusCode() >= 300) {
            throw new RuntimeException("Errore API " + response.statusCode() + ": " + new String(response.body()));
        }

        Files.write(Path.of("qrcode.png"), response.body());
        System.out.println("QR Code salvato in qrcode.png");
    }
}

Imports System
Imports System.IO
Imports System.Net.Http
Imports System.Text
Imports System.Threading.Tasks

Module Program
    Sub Main()
        MainAsync().GetAwaiter().GetResult()
    End Sub

    Private Async Function MainAsync() As Task
        Dim apiKey = Environment.GetEnvironmentVariable("QRCODEGENERATE_API_KEY")
        If String.IsNullOrWhiteSpace(apiKey) Then
            Throw New InvalidOperationException("Variabile QRCODEGENERATE_API_KEY mancante")
        End If

        Dim endpoint = "https://www.qrcodegenerate.it/api/v1/qrcode/generate-static"
        Dim json = "{" &
            """content"":""https://www.tuosito.it""," &
            """format"":""png""," &
            """size"":300," &
            """color"":{""dark"":""#000000"",""light"":""#ffffff""}" &
        "}"

        Using client As New HttpClient()
            Using request As New HttpRequestMessage(HttpMethod.Post, endpoint)
                request.Headers.Add("x-api-key", apiKey)
                request.Content = New StringContent(json, Encoding.UTF8, "application/json")

                Using response = Await client.SendAsync(request)
                    Dim body = Await response.Content.ReadAsByteArrayAsync()

                    If Not response.IsSuccessStatusCode Then
                        Dim errorText = Encoding.UTF8.GetString(body)
                        Throw New Exception("Errore API " & CInt(response.StatusCode) & ": " & errorText)
                    End If

                    File.WriteAllBytes("qrcode.png", body)
                    Console.WriteLine("QR Code salvato in qrcode.png")
                End Using
            End Using
        End Using
    End Function
End Module

<form id="qrForm">
  <input id="qrContent" type="url" placeholder="https://www.tuosito.it" required>
  <button type="submit">Genera QR</button>
</form>

<img id="qrPreview" alt="QR Code generato" hidden>

<script>
document.getElementById("qrForm").addEventListener("submit", async (event) => {
  event.preventDefault();

  const content = document.getElementById("qrContent").value;
  const response = await fetch("/api/qr-proxy", {
    method: "POST",
    headers: {
      "Content-Type": "application/json"
    },
    body: JSON.stringify({ content })
  });

  if (!response.ok) {
    throw new Error(await response.text());
  }

  const blob = await response.blob();
  const imageUrl = URL.createObjectURL(blob);
  const preview = document.getElementById("qrPreview");
  preview.src = imageUrl;
  preview.hidden = false;
});
</script>