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srnyxsrnyx
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Add HttpUtility 
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+166
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‎build.gradle.kts

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@@ -11,7 +11,10 @@ plugins {
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}
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repositories.mavenCentral()
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dependencies.compileOnly("org.jetbrains:annotations:24.0.1")
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dependencies {
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compileOnly("org.jetbrains:annotations:24.0.1")
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compileOnly("com.google.code.gson:gson:2.3.1")
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}
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setupJava("xyz.srnyx", "1.0.0", "General Java utility library for srnyx's projects", JavaVersion.VERSION_1_8)
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setupPublishing(

‎src/main/java/xyz/srnyx/javautilities/HttpUtility.java

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package xyz.srnyx.javautilities;
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import com.google.gson.JsonElement;
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import com.google.gson.JsonObject;
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import com.google.gson.JsonParser;
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import org.jetbrains.annotations.NotNull;
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import org.jetbrains.annotations.Nullable;
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import java.io.BufferedReader;
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import java.io.IOException;
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import java.io.InputStreamReader;
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import java.net.HttpURLConnection;
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import java.net.URI;
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import java.util.function.Function;
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import java.util.stream.Collectors;
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/**
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* Utility class for making HTTP requests
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*/
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public class HttpUtility {
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/**
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* Sends a GET request to the specified URL and returns the result of the specified function
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*
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* @param userAgent the user agent to use
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* @param url the URL to request from
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* @param function the function to apply to the {@link InputStreamReader}
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*
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* @param <T> the type of the result of the specified function
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*
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* @return the result of the specified function, or null if the request failed
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*/
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@Nullable
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public static <T> T get(@NotNull String userAgent, @NotNull String url, Function<InputStreamReader, T> function) {
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T result = null;
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HttpURLConnection connection = null;
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try {
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connection = (HttpURLConnection) URI.create(url).toURL().openConnection();
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connection.setRequestMethod("GET");
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connection.setRequestProperty("User-Agent", userAgent);
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if (connection.getResponseCode() == 404) return null;
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result = function.apply(new InputStreamReader(connection.getInputStream()));
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} catch (final IOException ignored) {
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// Ignored
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}
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if (connection != null) connection.disconnect();
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return result;
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}
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/**
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* Sends a GET request to the specified URL and returns the result as a {@link String}
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*
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* @param userAgent the user agent to use
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* @param urlString the URL to request from
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*
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* @return the {@link String}, or null if the request failed
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*/
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@Nullable
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public static String getString(@NotNull String userAgent, @NotNull String urlString) {
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return get(userAgent, urlString, reader -> new BufferedReader(reader).lines().collect(Collectors.joining("\n")));
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}
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/**
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* Sends a GET request to the specified URL and returns the result as a {@link JsonElement}
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*
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* @param userAgent the user agent to use when retrieving the {@link JsonElement}
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* @param urlString the URL to retrieve the {@link JsonElement} from
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*
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* @return the {@link JsonElement} retrieved from the specified URL
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*/
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@Nullable
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public static JsonElement getJson(@NotNull String userAgent, @NotNull String urlString) {
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return get(userAgent, urlString, reader -> new JsonParser().parse(reader));
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}
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/**
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* Sends a POST request to the specified URL with the specified {@link JsonObject JSON data}
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*
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* @param userAgent the user agent to use
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* @param urlString the URL to send the POST request to
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* @param data the {@link JsonObject JSON data} to send with the POST request
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*
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* @return the response code of the request
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*/
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public static int postJson(@NotNull String userAgent, @NotNull String urlString, @NotNull JsonElement data) {
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int responseCode = -1;
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HttpURLConnection connection = null;
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try {
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connection = (HttpURLConnection) URI.create(urlString).toURL().openConnection();
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connection.setRequestMethod("POST");
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connection.setRequestProperty("User-Agent", userAgent);
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connection.setRequestProperty("Content-Type", "application/json");
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connection.setDoOutput(true);
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connection.getOutputStream().write(data.toString().getBytes());
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responseCode = connection.getResponseCode();
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} catch (final IOException ignored) {
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// Ignored
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}
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if (connection != null) connection.disconnect();
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return responseCode;
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}
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/**
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* Sends a PUT request to the specified URL with the specified {@link JsonElement JSON data}
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*
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* @param userAgent the user agent to use
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* @param urlString the URL to send the PUT request to
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* @param data the {@link JsonElement JSON data} to send with the PUT request
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*
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* @return the response code of the request
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*/
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public static int putJson(@NotNull String userAgent, @NotNull String urlString, @NotNull JsonElement data) {
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int responseCode = -1;
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HttpURLConnection connection = null;
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try {
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connection = (HttpURLConnection) URI.create(urlString).toURL().openConnection();
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connection.setRequestMethod("PUT");
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connection.setRequestProperty("User-Agent", userAgent);
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connection.setRequestProperty("Content-Type", "application/json");
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connection.setDoOutput(true);
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connection.getOutputStream().write(data.toString().getBytes());
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responseCode = connection.getResponseCode();
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} catch (final IOException ignored) {
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// Ignored
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}
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if (connection != null) connection.disconnect();
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return responseCode;
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}
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/**
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* Sends a DELETE request to the specified URL
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*
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* @param userAgent the user agent to use
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* @param urlString the URL to send the DELETE request to
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*
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* @return the response code of the request
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*/
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public static int delete(@NotNull String userAgent, @NotNull String urlString) {
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int responseCode = -1;
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HttpURLConnection connection = null;
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try {
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connection = (HttpURLConnection) URI.create(urlString).toURL().openConnection();
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connection.setRequestMethod("DELETE");
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connection.setRequestProperty("User-Agent", userAgent);
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responseCode = connection.getResponseCode();
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} catch (final IOException ignored) {
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// Ignored
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}
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if (connection != null) connection.disconnect();
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return responseCode;
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}
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/**
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* Constructs a new {@link HttpUtility} instance (illegal)
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*
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* @throws UnsupportedOperationException if this class is instantiated
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*/
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private HttpUtility() {
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throw new UnsupportedOperationException("This is a utility class and cannot be instantiated");
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}
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}

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