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Build and publish release / Build and publish RemotePackSync (push) Successful in 51s
48 lines
2.0 KiB
Java
48 lines
2.0 KiB
Java
package dev.lexian.remotepacksync;
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import java.io.IOException;
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import java.net.URI;
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import java.net.http.HttpClient;
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import java.net.http.HttpRequest;
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import java.net.http.HttpResponse;
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import java.time.Duration;
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import java.util.HexFormat;
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import java.util.regex.Matcher;
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import java.util.regex.Pattern;
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/** Downloads and validates a SHA-1 checksum without downloading the resource pack itself. */
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public final class RemoteSha1Fetcher {
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private static final Pattern SHA1_PATTERN = Pattern.compile("(?i)(?<![0-9a-f])[0-9a-f]{40}(?![0-9a-f])");
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private static final Duration REQUEST_TIMEOUT = Duration.ofSeconds(15);
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private static final int MAX_RESPONSE_BYTES = 64 * 1024;
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private final HttpClient client = HttpClient.newBuilder()
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.connectTimeout(Duration.ofSeconds(10))
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.followRedirects(HttpClient.Redirect.NORMAL)
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.build();
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public byte[] fetch(URI sha1Url) throws IOException, InterruptedException {
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HttpRequest request = HttpRequest.newBuilder(sha1Url)
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.GET()
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.timeout(REQUEST_TIMEOUT)
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.header("Accept", "text/plain, text/*;q=0.9, */*;q=0.1")
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.header("User-Agent", "RemotePackSync/v1.0.0")
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.build();
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HttpResponse<byte[]> response = client.send(request, HttpResponse.BodyHandlers.ofByteArray());
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if (response.statusCode() < 200 || response.statusCode() >= 300) {
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throw new IOException("SHA-1 endpoint returned HTTP " + response.statusCode());
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}
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if (response.body().length > MAX_RESPONSE_BYTES) {
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throw new IOException("SHA-1 response exceeds " + MAX_RESPONSE_BYTES + " bytes");
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}
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String responseText = new String(response.body(), java.nio.charset.StandardCharsets.UTF_8);
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Matcher matcher = SHA1_PATTERN.matcher(responseText);
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if (!matcher.find()) {
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throw new IOException("SHA-1 response does not contain a 40-character hexadecimal SHA-1");
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}
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return HexFormat.of().parseHex(matcher.group());
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}
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}
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