Created
July 19, 2020 08:43
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Java 8+ HTTP Client.
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import io.swagger.v3.oas.models.PathItem.HttpMethod; | |
import java.io.BufferedReader; | |
import java.io.InputStreamReader; | |
import java.net.HttpURLConnection; | |
import java.net.URL; | |
import java.util.stream.Collectors; | |
import lombok.NoArgsConstructor; | |
import lombok.SneakyThrows; | |
import lombok.extern.java.Log; | |
import lombok.val; | |
/** | |
* Utility HTTP 1.1 client for requesting to other external API. | |
*/ | |
@Log | |
@NoArgsConstructor(staticName = "create") | |
public class HttpClient { | |
/** | |
* Extracts the content requested from a URL. | |
* | |
* @param url The URL to source from. | |
* @return The extraction content in string form. | |
* @since 1.0-SNAPSHOT. | |
*/ | |
@SneakyThrows | |
public String sourceFrom(final String url) { | |
val conn = (HttpURLConnection) new URL(url).openConnection(); | |
conn.setRequestMethod(HttpMethod.GET.name()); | |
if (conn.getResponseCode() != HttpURLConnection.HTTP_OK) { | |
throw new IllegalStateException( | |
"Not satisfiable status code: [" + conn.getResponseCode() + "]"); | |
} | |
try (val stream = new BufferedReader( | |
new InputStreamReader(conn.getInputStream()))) { | |
return stream.lines().collect(Collectors.joining()); | |
} | |
} |
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