#424

Committed 07 Sep 2026 03:43PM UTC coverage: 82.076% (+0.07%) from 82.005%

Build # #424

Build Type

push

Committed by

Commit Message

Retry failed connections caused by HTTP 429, 500, 502, 503 and 504 errors (Fixes #361)

Coverage Stats

29 of 31 new or added lines in 1 file covered. (93.55%)

6278 of 7649 relevant lines covered (82.08%)

0.82 hits per line

Source File
Press 'n' to go to next uncovered line, 'b' for previous

95.95

/jsign-crypto/src/main/java/net/jsign/jca/RESTClient.java

/*
 * Copyright 2021 Emmanuel Bourg
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package net.jsign.jca;

import java.io.IOException;
import java.net.HttpURLConnection;
import java.net.SocketTimeoutException;
import java.net.URL;
import java.net.URLEncoder;
import java.nio.charset.StandardCharsets;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Random;
import java.util.function.BiConsumer;
import java.util.function.Consumer;
import java.util.function.Function;
import java.util.logging.Level;
import java.util.logging.Logger;

import com.cedarsoftware.util.io.JsonReader;
import org.apache.commons.io.IOUtils;

class RESTClient {

    private final Logger log = Logger.getLogger(getClass().getName());

    /** Base URL of the REST service for relative resources */
    private final String endpoint;

    /** Callback setting the authentication headers for the request */
    private BiConsumer<HttpURLConnection, byte[]> authenticationHandler;

    /** Callback building an error message from the JSON formatted error response */
    private Function<Map<String, ?>, String> errorHandler;

    /** Number of attempts for a request */
    private int retries = 5;

    /** Initial pause between retries in milliseconds, doubled after each attempt on HTTP error (not on timeouts) */
    private int retryWait = 1000;

    /** Connect timeout in milliseconds */
    private int connectTimeout = 30000;

    /** Read timeout in milliseconds */
    private int readTimeout = 30000;

    public RESTClient(String endpoint) {
        this.endpoint = endpoint;
    }

    public RESTClient authentication(Consumer<HttpURLConnection>  authenticationHeaderSupplier) {
        this.authenticationHandler = (conn, data) -> authenticationHeaderSupplier.accept(conn);
        return this;
    }

    public RESTClient authentication(BiConsumer<HttpURLConnection, byte[]>  authenticationHeaderSupplier) {
        this.authenticationHandler = authenticationHeaderSupplier;
        return this;
    }

    public RESTClient errorHandler(Function<Map<String, ?>, String> errorHandler) {
        this.errorHandler = errorHandler;
        return this;
    }

    public RESTClient retries(int retries) {
        this.retries = retries;
        return this;
    }

    public RESTClient retryWait(int retryWait) {
        this.retryWait = retryWait;
        return this;
    }

    public RESTClient connectTimeout(int connectTimeout) {
        this.connectTimeout = connectTimeout;
        return this;
    }

    public RESTClient readTimeout(int readTimeout) {
        this.readTimeout = readTimeout;
        return this;
    }

    public Map<String, ?> get(String resource) throws IOException {
        return query("GET", resource, null, null);
    }

    public Map<String, ?> post(String resource, String body) throws IOException {
        return query("POST", resource, body, null);
    }

    public Map<String, ?> post(String resource, String body, Map<String, String> headers) throws IOException {
        return query("POST", resource, body, headers);
    }

    public Map<String, ?> post(String resource, Map<String, String> params) throws IOException {
        return post(resource, params, false);
    }

    public Map<String, ?> post(String resource, Map<String, ?> params, boolean multipart) throws IOException {
        Map<String, String> headers = new HashMap<>();
        StringBuilder body = new StringBuilder();

        if (multipart) {
            String boundary = "------------------------" + Long.toHexString(new Random().nextLong());
            headers.put("Content-Type", "multipart/form-data; boundary=" + boundary);

            for (String name : params.keySet()) {
                Object value = params.get(name);

                body.append("--" + boundary + "\r\n");
                if (value instanceof byte[]) {
                    body.append("Content-Type: application/octet-stream" + "\r\n");
                    body.append("Content-Disposition: form-data; name=\"" + name + '"' + "; filename=\"" + name + ".data\"\r\n");
                    body.append("\r\n");
                    body.append(new String((byte[]) value, StandardCharsets.UTF_8));
                } else {
                    body.append("Content-Disposition: form-data; name=\"" + name + '"' + "\r\n");
                    body.append("\r\n");
                    body.append(params.get(name));
                }
                body.append("\r\n");
            }

            body.append("--" + boundary + "--");

        } else {
            headers.put("Content-Type", "application/x-www-form-urlencoded");

            for (Map.Entry<String, ?> param : params.entrySet()) {
                if (body.length() > 0) {
                    body.append('&');
                }
                body.append(param.getKey()).append('=').append(URLEncoder.encode(param.getValue().toString(), "UTF-8"));
            }
        }

        return post(resource, body.toString(), headers);
    }

    private Map<String, ?> query(String method, String resource, String body, Map<String, String> headers) throws IOException {
        URL url = new URL(resource.startsWith("http") ? resource : endpoint + resource);
        log.finest(method + " " + url);
        HttpURLConnection c = open(url, conn -> {
            conn.setConnectTimeout(connectTimeout);
            conn.setReadTimeout(readTimeout);
            conn.setRequestMethod(method);
            String userAgent = System.getProperty("http.agent");
            conn.setRequestProperty("User-Agent", "Jsign (https://ebourg.github.io/jsign/)" + (userAgent != null ? " " + userAgent : ""));
            if (headers != null) {
                for (Map.Entry<String, String> header : headers.entrySet()) {
                    conn.setRequestProperty(header.getKey(), header.getValue());
                }
            }

            byte[] data = body != null ? body.getBytes(StandardCharsets.UTF_8) : null;
            if (authenticationHandler != null) {
                authenticationHandler.accept(conn, data);
            }
            if (body != null) {
                if (!conn.getRequestProperties().containsKey("Content-Type")) {
                    conn.setRequestProperty("Content-Type", "application/json; charset=utf-8");
                }
                conn.setRequestProperty("Content-Length", String.valueOf(data.length));
                conn.setRequestProperty("Accept", "*/*");
            }

            if (log.isLoggable(Level.FINEST)) {
                for (String requestHeader : conn.getRequestProperties().keySet()) {
                    List<String> values = conn.getRequestProperties().get(requestHeader);
                    log.finest(requestHeader + ": " + (values.size() == 1 ? values.get(0) : values));
                }
            }

            if (body != null) {
                log.finest("Content:\n" + body);
                conn.setDoOutput(true);
                conn.getOutputStream().write(data);
            }
            log.finest("");
        });

        HttpURLConnection conn = c;
        int responseCode = conn.getResponseCode();
        String contentType = conn.getHeaderField("Content-Type");
        log.finest("Response Code: " + responseCode);
        log.finest("Content-Type: " + contentType);

        if (responseCode < 400) {
            byte[] binaryResponse = IOUtils.toByteArray(conn.getInputStream());
            String response = new String(binaryResponse, StandardCharsets.UTF_8);
            log.finest("Content-Length: " + binaryResponse.length);
            log.finest("Content:\n" + response);
            log.finest("");

            Object value = JsonReader.jsonToJava(response);
            if (value instanceof Map) {
                return (Map) value;
            } else if (value instanceof Object[]) {
                Map<String, Object> map = new HashMap<>();
                map.put("result", value);
                return map;
            } else {
                Map<String, Object> map = new HashMap<>();
                map.put("result", response);
                return map;  
            }
        } else {
            String error = conn.getErrorStream() != null ? IOUtils.toString(conn.getErrorStream(), StandardCharsets.UTF_8) : "";
            if (conn.getErrorStream() != null) {
                log.finest("Error:\n" + error);
            }
            if (contentType != null && (contentType.startsWith("application/json") || contentType.startsWith("application/x-amz-json-1.1"))) {
                throw new IOException(errorHandler != null ? errorHandler.apply(JsonReader.jsonToMaps(error)) : error);
            } else {
                throw new IOException("HTTP Error " + responseCode + (conn.getResponseMessage() != null ? " - " + conn.getResponseMessage() : "") + " (" + url + ")");
            }
        }
    }

    /**
     * Opens a connection to the specified URL and makes several attempts if an error occurs.
     * The provided configurator is used to set up the connection before making the request.
     */
    private HttpURLConnection open(URL url, HttpURLConnectionHandler configurator) throws IOException {
        int attempt = 1;

        HttpURLConnection conn;

        while (true) {
            try {
                conn = (HttpURLConnection) url.openConnection();
                configurator.handle(conn);

                int responseCode = conn.getResponseCode();
                if (isRetryableError(responseCode) && attempt < retries) {
                    if (conn.getErrorStream() != null) {
                        conn.getErrorStream().close();
                    }
                    long delay = getRetryDelay(conn, attempt);
                    log.fine("Connection attempt " + attempt + " of " + retries + " to " + url + " failed with HTTP error " + responseCode + ", retrying in " + delay + " ms");
                    pause(delay);
                } else {
                    break;
                }

            } catch (SocketTimeoutException e) {
                if (attempt < retries) {
                    log.fine("Connection attempt " + attempt + " of " + retries + " to " + url + " timed out, retrying in " + retryWait + " ms");
                    pause(retryWait);
                } else {
                    throw (IOException) new SocketTimeoutException("Unable to connect to " + url + " after " + retries + " attempts").initCause(e);
                }
            }
            attempt++;
        }

        return conn;
    }

    private boolean isRetryableError(int responseCode) {
        return responseCode == 429 // Too Many Requests
                || responseCode == HttpURLConnection.HTTP_INTERNAL_ERROR
                || responseCode == HttpURLConnection.HTTP_BAD_GATEWAY
                || responseCode == HttpURLConnection.HTTP_UNAVAILABLE
                || responseCode == HttpURLConnection.HTTP_GATEWAY_TIMEOUT;
    }

    /**
     * Returns the retry delay in milliseconds, either the value specified in the <code>Retry-After</code> header, or an
     * exponential backoff delay for the specified attempt capped to the connect timeout.
     */
    private long getRetryDelay(HttpURLConnection conn, int attempt) {
        Long retryAfter = getRetryAfter(conn);
        if (retryAfter != null) {
            return retryAfter;
        } else {
            return (long) Math.min(connectTimeout, retryWait * Math.pow(2, attempt - 1));
        }
    }

    /**
     * Returns the pause in milliseconds requested by the server with the <code>Retry-After</code> header,
     * or <code>null</code> if the header is absent or unparseable.
     */
    private Long getRetryAfter(HttpURLConnection conn) {
        String retryAfter = conn.getHeaderField("Retry-After");
        if (retryAfter == null) {
            return null;
        }

        try {
            return Long.parseLong(retryAfter.trim()) * 1000;
        } catch (NumberFormatException e) {
            long date = conn.getHeaderFieldDate("Retry-After", 0);
            return date > 0 ? Math.max(0, date - System.currentTimeMillis()) : null;
        }
    }

    private void pause(long millis) {
        try {
            Thread.sleep(millis);
        } catch (InterruptedException e) {
            Thread.currentThread().interrupt();
        }
    }

    private interface HttpURLConnectionHandler {
        void handle(HttpURLConnection conn) throws IOException;
    }
}

1	/*
2	* Copyright 2021 Emmanuel Bourg
3	*
4	* Licensed under the Apache License, Version 2.0 (the "License");
5	* you may not use this file except in compliance with the License.
6	* You may obtain a copy of the License at
7	*
8	* http://www.apache.org/licenses/LICENSE-2.0
9	*
10	* Unless required by applicable law or agreed to in writing, software
11	* distributed under the License is distributed on an "AS IS" BASIS,
12	* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13	* See the License for the specific language governing permissions and
14	* limitations under the License.
15	*/
16
17	package net.jsign.jca;
18
19	import java.io.IOException;
20	import java.net.HttpURLConnection;
21	import java.net.SocketTimeoutException;
22	import java.net.URL;
23	import java.net.URLEncoder;
24	import java.nio.charset.StandardCharsets;
25	import java.util.HashMap;
26	import java.util.List;
27	import java.util.Map;
28	import java.util.Random;
29	import java.util.function.BiConsumer;
30	import java.util.function.Consumer;
31	import java.util.function.Function;
32	import java.util.logging.Level;
33	import java.util.logging.Logger;
34
35	import com.cedarsoftware.util.io.JsonReader;
36	import org.apache.commons.io.IOUtils;
37
38	class RESTClient {
39
40	private final Logger log = Logger.getLogger(getClass().getName());	1 ✔
41
42	/** Base URL of the REST service for relative resources */
43	private final String endpoint;
44
45	/** Callback setting the authentication headers for the request */
46	private BiConsumer<HttpURLConnection, byte[]> authenticationHandler;
47
48	/** Callback building an error message from the JSON formatted error response */
49	private Function<Map<String, ?>, String> errorHandler;
50
51	/** Number of attempts for a request */
52	private int retries = 5;	1 ✔
53
54	/** Initial pause between retries in milliseconds, doubled after each attempt on HTTP error (not on timeouts) */
55	private int retryWait = 1000;	1 ✔
56
57	/** Connect timeout in milliseconds */
58	private int connectTimeout = 30000;	1 ✔
59
60	/** Read timeout in milliseconds */
61	private int readTimeout = 30000;	1 ✔
62
63	public RESTClient(String endpoint) {	1 ✔
64	this.endpoint = endpoint;	1 ✔
65	}	1 ✔
66
67	public RESTClient authentication(Consumer<HttpURLConnection> authenticationHeaderSupplier) {
68	this.authenticationHandler = (conn, data) -> authenticationHeaderSupplier.accept(conn);	1 ✔
69	return this;	1 ✔
70	}
71
72	public RESTClient authentication(BiConsumer<HttpURLConnection, byte[]> authenticationHeaderSupplier) {
73	this.authenticationHandler = authenticationHeaderSupplier;	1 ✔
74	return this;	1 ✔
75	}
76
77	public RESTClient errorHandler(Function<Map<String, ?>, String> errorHandler) {
78	this.errorHandler = errorHandler;	1 ✔
79	return this;	1 ✔
80	}
81
82	public RESTClient retries(int retries) {
83	this.retries = retries;	1 ✔
84	return this;	1 ✔
85	}
86
87	public RESTClient retryWait(int retryWait) {
88	this.retryWait = retryWait;	1 ✔
89	return this;	1 ✔
90	}
91
92	public RESTClient connectTimeout(int connectTimeout) {
93	this.connectTimeout = connectTimeout;	1 ✔
94	return this;	1 ✔
95	}
96
97	public RESTClient readTimeout(int readTimeout) {
98	this.readTimeout = readTimeout;	1 ✔
99	return this;	1 ✔
100	}
101
102	public Map<String, ?> get(String resource) throws IOException {
103	return query("GET", resource, null, null);	1 ✔
104	}
105
106	public Map<String, ?> post(String resource, String body) throws IOException {
107	return query("POST", resource, body, null);	1 ✔
108	}
109
110	public Map<String, ?> post(String resource, String body, Map<String, String> headers) throws IOException {
111	return query("POST", resource, body, headers);	1 ✔
112	}
113
114	public Map<String, ?> post(String resource, Map<String, String> params) throws IOException {
115	return post(resource, params, false);	1 ✔
116	}
117
118	public Map<String, ?> post(String resource, Map<String, ?> params, boolean multipart) throws IOException {
119	Map<String, String> headers = new HashMap<>();	1 ✔
120	StringBuilder body = new StringBuilder();	1 ✔
121
122	if (multipart) {	1 ✔
123	String boundary = "------------------------" + Long.toHexString(new Random().nextLong());	1 ✔
124	headers.put("Content-Type", "multipart/form-data; boundary=" + boundary);	1 ✔
125
126	for (String name : params.keySet()) {	1 ✔
127	Object value = params.get(name);	1 ✔
128
129	body.append("--" + boundary + "\r\n");	1 ✔
130	if (value instanceof byte[]) {	1 ✔
131	body.append("Content-Type: application/octet-stream" + "\r\n");	1 ✔
132	body.append("Content-Disposition: form-data; name=\"" + name + '"' + "; filename=\"" + name + ".data\"\r\n");	1 ✔
133	body.append("\r\n");	1 ✔
134	body.append(new String((byte[]) value, StandardCharsets.UTF_8));	1 ✔
135	} else {
136	body.append("Content-Disposition: form-data; name=\"" + name + '"' + "\r\n");	1 ✔
137	body.append("\r\n");	1 ✔
138	body.append(params.get(name));	1 ✔
139	}
140	body.append("\r\n");	1 ✔
141	}	1 ✔
142
143	body.append("--" + boundary + "--");	1 ✔
144
145	} else {	1 ✔
146	headers.put("Content-Type", "application/x-www-form-urlencoded");	1 ✔
147
148	for (Map.Entry<String, ?> param : params.entrySet()) {	1 ✔
149	if (body.length() > 0) {	1 ✔
150	body.append('&');	1 ✔
151	}
152	body.append(param.getKey()).append('=').append(URLEncoder.encode(param.getValue().toString(), "UTF-8"));	1 ✔
153	}	1 ✔
154	}
155
156	return post(resource, body.toString(), headers);	1 ✔
157	}
158
159	private Map<String, ?> query(String method, String resource, String body, Map<String, String> headers) throws IOException {
160	URL url = new URL(resource.startsWith("http") ? resource : endpoint + resource);	1 ✔
161	log.finest(method + " " + url);	1 ✔
162	HttpURLConnection c = open(url, conn -> {	1 ✔
163	conn.setConnectTimeout(connectTimeout);	1 ✔
164	conn.setReadTimeout(readTimeout);	1 ✔
165	conn.setRequestMethod(method);	1 ✔
166	String userAgent = System.getProperty("http.agent");	1 ✔
167	conn.setRequestProperty("User-Agent", "Jsign (https://ebourg.github.io/jsign/)" + (userAgent != null ? " " + userAgent : ""));	1 ✔
168	if (headers != null) {	1 ✔
169	for (Map.Entry<String, String> header : headers.entrySet()) {	1 ✔
170	conn.setRequestProperty(header.getKey(), header.getValue());	1 ✔
171	}	1 ✔
172	}
173
174	byte[] data = body != null ? body.getBytes(StandardCharsets.UTF_8) : null;	1 ✔
175	if (authenticationHandler != null) {	1 ✔
176	authenticationHandler.accept(conn, data);	1 ✔
177	}
178	if (body != null) {	1 ✔
179	if (!conn.getRequestProperties().containsKey("Content-Type")) {	1 ✔
180	conn.setRequestProperty("Content-Type", "application/json; charset=utf-8");	1 ✔
181	}
182	conn.setRequestProperty("Content-Length", String.valueOf(data.length));	1 ✔
183	conn.setRequestProperty("Accept", "/");	1 ✔
184	}
185
186	if (log.isLoggable(Level.FINEST)) {	1 ✔
187	for (String requestHeader : conn.getRequestProperties().keySet()) {	×
188	List<String> values = conn.getRequestProperties().get(requestHeader);	×
189	log.finest(requestHeader + ": " + (values.size() == 1 ? values.get(0) : values));	×
190	}	×
191	}
192
193	if (body != null) {	1 ✔
194	log.finest("Content:\n" + body);	1 ✔
195	conn.setDoOutput(true);	1 ✔
196	conn.getOutputStream().write(data);	1 ✔
197	}
198	log.finest("");	1 ✔
199	});	1 ✔
200
201	HttpURLConnection conn = c;	1 ✔
202	int responseCode = conn.getResponseCode();	1 ✔
203	String contentType = conn.getHeaderField("Content-Type");	1 ✔
204	log.finest("Response Code: " + responseCode);	1 ✔
205	log.finest("Content-Type: " + contentType);	1 ✔
206
207	if (responseCode < 400) {	1 ✔
208	byte[] binaryResponse = IOUtils.toByteArray(conn.getInputStream());	1 ✔
209	String response = new String(binaryResponse, StandardCharsets.UTF_8);	1 ✔
210	log.finest("Content-Length: " + binaryResponse.length);	1 ✔
211	log.finest("Content:\n" + response);	1 ✔
212	log.finest("");	1 ✔
213
214	Object value = JsonReader.jsonToJava(response);	1 ✔
215	if (value instanceof Map) {	1 ✔
216	return (Map) value;	1 ✔
217	} else if (value instanceof Object[]) {	1 ✔
218	Map<String, Object> map = new HashMap<>();	1 ✔
219	map.put("result", value);	1 ✔
220	return map;	1 ✔
221	} else {
222	Map<String, Object> map = new HashMap<>();	1 ✔
223	map.put("result", response);	1 ✔
224	return map;	1 ✔
225	}
226	} else {
227	String error = conn.getErrorStream() != null ? IOUtils.toString(conn.getErrorStream(), StandardCharsets.UTF_8) : "";	1 ✔
228	if (conn.getErrorStream() != null) {	1 ✔
229	log.finest("Error:\n" + error);	1 ✔
230	}
231	if (contentType != null && (contentType.startsWith("application/json") \|\| contentType.startsWith("application/x-amz-json-1.1"))) {	1 ✔
232	throw new IOException(errorHandler != null ? errorHandler.apply(JsonReader.jsonToMaps(error)) : error);	1 ✔
233	} else {
234	throw new IOException("HTTP Error " + responseCode + (conn.getResponseMessage() != null ? " - " + conn.getResponseMessage() : "") + " (" + url + ")");	1 ✔
235	}
236	}
237	}
238
239	/**
240	* Opens a connection to the specified URL and makes several attempts if an error occurs.
241	* The provided configurator is used to set up the connection before making the request.
242	*/
243	private HttpURLConnection open(URL url, HttpURLConnectionHandler configurator) throws IOException {
244	int attempt = 1;	1 ✔
245
246	HttpURLConnection conn;
247
248	while (true) {
249	try {
250	conn = (HttpURLConnection) url.openConnection();	1 ✔
251	configurator.handle(conn);	1 ✔
252
253	int responseCode = conn.getResponseCode();	1 ✔
254	if (isRetryableError(responseCode) && attempt < retries) {	1 ✔
255	if (conn.getErrorStream() != null) {	1 ✔
256	conn.getErrorStream().close();	1 ✔
257	}
258	long delay = getRetryDelay(conn, attempt);	1 ✔
259	log.fine("Connection attempt " + attempt + " of " + retries + " to " + url + " failed with HTTP error " + responseCode + ", retrying in " + delay + " ms");	1 ✔
260	pause(delay);	1 ✔
261	} else {	1 ✔
262	break;	1 ✔
263	}
264
265	} catch (SocketTimeoutException e) {	1 ✔
266	if (attempt < retries) {	1 ✔
267	log.fine("Connection attempt " + attempt + " of " + retries + " to " + url + " timed out, retrying in " + retryWait + " ms");	1 ✔
268	pause(retryWait);	1 ✔
269	} else {
270	throw (IOException) new SocketTimeoutException("Unable to connect to " + url + " after " + retries + " attempts").initCause(e);	1 ✔
271	}
272	}	1 ✔
273	attempt++;	1 ✔
274	}
275
276	return conn;	1 ✔
277	}
278
279	private boolean isRetryableError(int responseCode) {
280	return responseCode == 429 // Too Many Requests	1 ✔
281	\|\| responseCode == HttpURLConnection.HTTP_INTERNAL_ERROR
282	\|\| responseCode == HttpURLConnection.HTTP_BAD_GATEWAY
283	\|\| responseCode == HttpURLConnection.HTTP_UNAVAILABLE
284	\|\| responseCode == HttpURLConnection.HTTP_GATEWAY_TIMEOUT;
285	}
286
287	/**
288	* Returns the retry delay in milliseconds, either the value specified in the <code>Retry-After</code> header, or an
289	* exponential backoff delay for the specified attempt capped to the connect timeout.
290	*/
291	private long getRetryDelay(HttpURLConnection conn, int attempt) {
292	Long retryAfter = getRetryAfter(conn);	1 ✔
293	if (retryAfter != null) {	1 ✔
294	return retryAfter;	1 ✔
295	} else {
296	return (long) Math.min(connectTimeout, retryWait * Math.pow(2, attempt - 1));	1 ✔
297	}
298	}
299
300	/**
301	* Returns the pause in milliseconds requested by the server with the <code>Retry-After</code> header,
302	* or <code>null</code> if the header is absent or unparseable.
303	*/
304	private Long getRetryAfter(HttpURLConnection conn) {
305	String retryAfter = conn.getHeaderField("Retry-After");	1 ✔
306	if (retryAfter == null) {	1 ✔
307	return null;	1 ✔
308	}
309
310	try {
311	return Long.parseLong(retryAfter.trim()) * 1000;	1 ✔
312	} catch (NumberFormatException e) {	1 ✔
313	long date = conn.getHeaderFieldDate("Retry-After", 0);	1 ✔
314	return date > 0 ? Math.max(0, date - System.currentTimeMillis()) : null;	1 ✔
315	}
316	}
317
318	private void pause(long millis) {
319	try {
320	Thread.sleep(millis);	1 ✔
NEW 321	} catch (InterruptedException e) {	×
NEW 322	Thread.currentThread().interrupt();	×
323	}	1 ✔
324	}	1 ✔
325
326	private interface HttpURLConnectionHandler {
327	void handle(HttpURLConnection conn) throws IOException;
328	}
329	}

ebourg / jsign / #424

Source File Press 'n' to go to next uncovered line, 'b' for previous

Source File
Press 'n' to go to next uncovered line, 'b' for previous