How to Fetch Flight Prices Using Kiwi.com API in Java

Fetching Flight Prices Using Kiwi.com API in Java

• Ensure you have the necessary dependencies, such as `HttpClient`, for making HTTP requests. You may need to add these to your build configuration file, like `pom.xml` for Maven or `build.gradle` for Gradle.

<!-- Maven Dependency for HTTP Client -->
<dependency>
    <groupId>org.apache.httpcomponents</groupId>
    <artifactId>httpclient</artifactId>
    <version>4.5.13</version>
</dependency>

• Initialize the HTTP client in your Java application. This client will be used to send requests to the Kiwi.com API.

import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;

public class FlightFetcher {
    private CloseableHttpClient httpClient;

    public FlightFetcher() {
        this.httpClient = HttpClients.createDefault();
    }
}

• Construct the GET request with the appropriate endpoint and parameters. Example endpoint would be for Kiwi.com `/v2/search` and requires parameters like `fly_from`, `fly_to`, `dateFrom`, `dateTo`, etc. Additionally, you must include your API key in the headers for authentication.

import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.utils.URIBuilder;

import java.net.URI;
import java.net.URISyntaxException;

public HttpGet createRequest(String origin, String destination, String date) throws URISyntaxException {
    URI uri = new URIBuilder("https://api.skypicker.com/flights")
            .addParameter("fly_from", origin)
            .addParameter("fly_to", destination)
            .addParameter("dateFrom", date)
            .addParameter("dateTo", date)
            .build();

    HttpGet request = new HttpGet(uri);
    request.setHeader("apikey", "YOUR_API_KEY");

    return request;
}

• Execute the request and handle the response. You would typically want to capture the response payload and parse it, usually returned as JSON.

import org.apache.http.HttpResponse;
import org.apache.http.util.EntityUtils;

import java.io.IOException;

public String executeRequest(HttpGet request) throws IOException {
    HttpResponse response = httpClient.execute(request);
    return EntityUtils.toString(response.getEntity(), "UTF-8");
}

• Parse the JSON response. Use a JSON library such as Gson or Jackson to convert the JSON response into a usable Java object.

import com.google.gson.Gson;
import com.google.gson.JsonObject;

public void parseJsonResponse(String jsonResponse) {
    Gson gson = new Gson();
    JsonObject jsonObject = gson.fromJson(jsonResponse, JsonObject.class);
    // Extract and use flight price information from jsonObject as needed
}

• Gracefully handle exceptions and errors. Always ensure that your code handles potential issues like network errors or bad responses from the API.

try {
    FlightFetcher flightFetcher = new FlightFetcher();
    HttpGet request = flightFetcher.createRequest("NYC", "LAX", "2023-12-01");
    String response = flightFetcher.executeRequest(request);
    flightFetcher.parseJsonResponse(response);
} catch (URISyntaxException | IOException e) {
    e.printStackTrace();
}

• Close the HTTP client when it's no longer needed to free up resources properly.

public void close() throws IOException {
    httpClient.close();
}

This example provides a basic outline for fetching and processing flight prices using the Kiwi.com API in Java. Always refer to the Kiwi.com API documentation for any specific requirements or updates related to their API usage.