Curl کو Java کنورٹر

Java API ٹیسٹنگ کے لیے عام curl کمانڈز

یہاں کچھ عام curl کمانڈز ہیں جنہیں آپ Java کوڈ میں تبدیل کر سکتے ہیں:

• Basic GET request: curl https://api.example.com/users
• POST with JSON data: curl -X POST -H "Content-Type: application/json" -d '{"name":"John","email":"[email protected]"}' https://api.example.com/users
• PUT with authentication: curl -X PUT -H "Authorization: Bearer token123" -d '{"status":"active"}' https://api.example.com/users/1
• DELETE request: curl -X DELETE https://api.example.com/users/1
• Custom headers: curl -H "X-API-Key: abc123" -H "Accept: application/json" https://api.example.com/data

Java HttpClient مثالیں

Java کی HttpClient لائبریری (Java 11 میں متعارف کرائی گئی) HTTP ریکویسٹس بنانے کا ایک طاقتور اور جدید طریقہ ہے۔ یہاں کچھ عام Java HttpClient پیٹرنز ہیں:

Java HttpClient کے ساتھ فائل اپلوڈ

import java.io.IOException;
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;
import java.nio.file.Paths;

public class FileUploadExample {
    public static void main(String[] args) throws IOException, InterruptedException {
        HttpClient client = HttpClient.newBuilder()
                .version(HttpClient.Version.HTTP_2)
                .build();
                
        Path path = Paths.get("document.pdf");
        String boundary = "----WebKitFormBoundary" + System.currentTimeMillis();
        String contentType = "multipart/form-data; boundary=" + boundary;
        
        // Create multipart form data
        String data = "--" + boundary + "\r\n" +
                "Content-Disposition: form-data; name=\"file\"; filename=\"" + path.getFileName() + "\"\r\n" +
                "Content-Type: application/pdf\r\n\r\n";
                
        byte[] fileData = Files.readAllBytes(path);
        byte[] requestBody = new byte[data.getBytes().length + fileData.length + ("\r\n--" + boundary + "--\r\n").getBytes().length];
        
        System.arraycopy(data.getBytes(), 0, requestBody, 0, data.getBytes().length);
        System.arraycopy(fileData, 0, requestBody, data.getBytes().length, fileData.length);
        System.arraycopy(("\r\n--" + boundary + "--\r\n").getBytes(), 0, requestBody, 
                data.getBytes().length + fileData.length, ("\r\n--" + boundary + "--\r\n").getBytes().length);
        
        HttpRequest request = HttpRequest.newBuilder()
                .uri(URI.create("https://api.example.com/upload"))
                .header("Content-Type", contentType)
                .header("Authorization", "Bearer YOUR_TOKEN_HERE")
                .POST(HttpRequest.BodyPublishers.ofByteArray(requestBody))
                .build();
                
        HttpResponse response = client.send(request, 
                HttpResponse.BodyHandlers.ofString());
                
        System.out.println(response.body());
    }
}

ٹائم آؤٹ اور ایرر ہینڈلنگ کے ساتھ Java HttpClient

import java.io.IOException;
import java.net.URI;
import java.net.http.HttpClient;
import java.net.http.HttpRequest;
import java.net.http.HttpResponse;
import java.time.Duration;

public class ErrorHandlingExample {
    public static void main(String[] args) {
        HttpClient client = HttpClient.newBuilder()
                .version(HttpClient.Version.HTTP_2)
                .connectTimeout(Duration.ofSeconds(5))
                .build();
                
        HttpRequest request = HttpRequest.newBuilder()
                .uri(URI.create("https://api.example.com/data"))
                .timeout(Duration.ofSeconds(5))
                .GET()
                .build();
                
        try {
            HttpResponse response = client.send(request, 
                    HttpResponse.BodyHandlers.ofString());
                    
            int statusCode = response.statusCode();
            if (statusCode >= 200 && statusCode < 300) {
                System.out.println("Success: " + response.body());
            } else {
                System.out.println("Error: " + statusCode + " - " + response.body());
            }
        } catch (IOException e) {
            System.out.println("Connection error: " + e.getMessage());
        } catch (InterruptedException e) {
            System.out.println("Request interrupted: " + e.getMessage());
            Thread.currentThread().interrupt();
        } catch (Exception e) {
            System.out.println("Error making request: " + e.getMessage());
        }
    }
}

Java API ٹیسٹنگ کے لیے Curl کمانڈ حوالہ

Java کے ساتھ موثر API ٹیسٹنگ کے لیے curl کمانڈز کو سمجھنا ضروری ہے۔ یہاں ہمارے کنورٹر کے ذریعے سپورٹ کردہ عام curl آپشنز کا ایک فوری حوالہ ہے:

بنیادی curl سنٹیکس

curl [options] [URL]

عام curl آپشنز

• -X, --request METHOD: Specify request method (GET, POST, PUT, DELETE, etc.)
• -H, --header LINE: Add header to the request
• -d, --data DATA: Send data in POST request
• -F, --form CONTENT: Submit form data
• -u, --user USER:PASSWORD: Server user and password
• -k, --insecure: Allow insecure server connections
• -I, --head: Show document info only
• -v, --verbose: Make the operation more verbose
• -s, --silent: Silent mode
• --connect-timeout SECONDS: Maximum time for connection

پیچیدہ curl کمانڈز کو تبدیل کرنا

ہمارا Java کنورٹر متعدد ہیڈرز، اتھنٹیکیشن، ڈیٹا پے لوڈز، اور مختلف آپشنز سمیت پیچیدہ curl کمانڈز کو سنبھالتا ہے۔ بس اپنی curl کمانڈ پیسٹ کریں اور HttpClient لائبریری کا استعمال کرتے ہوئے صاف، جدید Java کوڈ حاصل کریں۔

Java HttpClient بہترین طریقے

Java HttpClient لائبریری کے ساتھ کام کرتے وقت، موثر اور محفوظ API انٹریکشنز کے لیے ان بہترین طریقوں پر عمل کریں:

1. HttpClient انسٹینسز کو دوبارہ استعمال کریں

import java.net.http.HttpClient;
import java.net.http.HttpRequest;
import java.net.http.HttpResponse;
import java.net.URI;

public class HttpClientReuseExample {
    // Create a single HttpClient instance for the application
    private static final HttpClient httpClient = HttpClient.newBuilder()
            .version(HttpClient.Version.HTTP_2)
            .build();
            
    public static void main(String[] args) throws Exception {
        // First request
        HttpRequest request1 = HttpRequest.newBuilder()
                .uri(URI.create("https://api.example.com/users"))
                .GET()
                .build();
        HttpResponse response1 = httpClient.send(request1, 
                HttpResponse.BodyHandlers.ofString());
                
        // Second request (uses same client)
        HttpRequest request2 = HttpRequest.newBuilder()
                .uri(URI.create("https://api.example.com/products"))
                .GET()
                .build();
        HttpResponse response2 = httpClient.send(request2, 
                HttpResponse.BodyHandlers.ofString());
    }
}

2. مناسب ایرر ہینڈلنگ کو نافذ کریں

import java.io.IOException;
import java.net.URI;
import java.net.http.HttpClient;
import java.net.http.HttpRequest;
import java.net.http.HttpResponse;
import java.net.http.HttpTimeoutException;

public class ErrorHandlingBestPractice {
    public static void main(String[] args) {
        HttpClient client = HttpClient.newHttpClient();
        HttpRequest request = HttpRequest.newBuilder()
                .uri(URI.create("https://api.example.com/data"))
                .GET()
                .build();
                
        try {
            HttpResponse response = client.send(request, 
                    HttpResponse.BodyHandlers.ofString());
                    
            switch (response.statusCode()) {
                case 200:
                case 201:
                    System.out.println("Success: " + response.body());
                    break;
                case 400:
                    System.out.println("Bad request: " + response.body());
                    break;
                case 401:
                case 403:
                    System.out.println("Authentication error: " + response.statusCode());
                    break;
                case 404:
                    System.out.println("Resource not found");
                    break;
                case 500:
                case 503:
                    System.out.println("Server error: " + response.statusCode());
                    break;
                default:
                    System.out.println("Unexpected status: " + response.statusCode());
            }
        } catch (HttpTimeoutException e) {
            System.out.println("Request timed out: " + e.getMessage());
        } catch (IOException e) {
            System.out.println("Network error: " + e.getMessage());
        } catch (InterruptedException e) {
            System.out.println("Request interrupted");
            Thread.currentThread().interrupt();
        }
    }
}

3. بہتر کارکردگی کے لیے غیر ہمزمان ریکویسٹس کا استعمال کریں

import java.net.URI;
import java.net.http.HttpClient;
import java.net.http.HttpRequest;
import java.net.http.HttpResponse;
import java.util.concurrent.CompletableFuture;

public class AsyncRequestExample {
    public static void main(String[] args) {
        HttpClient client = HttpClient.newHttpClient();
        
        HttpRequest request = HttpRequest.newBuilder()
                .uri(URI.create("https://api.example.com/data"))
                .GET()
                .build();
                
        CompletableFuture> futureResponse = 
                client.sendAsync(request, HttpResponse.BodyHandlers.ofString());
                
        futureResponse
            .thenApply(HttpResponse::body)
            .thenAccept(System.out::println)
            .exceptionally(e -> {
                System.err.println("Error: " + e.getMessage());
                return null;
            });
            
        // Do other work while the request is processing
        System.out.println("Request sent asynchronously...");
        
        // Wait for the request to complete if needed
        futureResponse.join();
    }
}