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added code so that the Downloader now follows 1 level of redirection to download the file (part of patch for issue #196)

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Former-commit-id: ecd914dbcacad1e12a243fdff90f043ef114c160
This commit is contained in:
Jeremy Long
2015-02-18 20:10:44 -05:00
parent a28c2819fa
commit 085ab48f3f
1 changed files with 33 additions and 7 deletions
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40
dependency-check-utils/src/main/java/org/owasp/dependencycheck/utils/Downloader.java
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@@ -94,6 +94,34 @@ public final class Downloader {
conn = URLConnectionFactory.createHttpURLConnection(url, useProxy);
conn.setRequestProperty("Accept-Encoding", "gzip, deflate");
conn.connect();
int status = conn.getResponseCode();
if (status != HttpURLConnection.HTTP_OK) {
if (status == HttpURLConnection.HTTP_MOVED_TEMP
|| status == HttpURLConnection.HTTP_MOVED_PERM
|| status == HttpURLConnection.HTTP_SEE_OTHER) {
String location = conn.getHeaderField("Location");
try {
conn.disconnect();
} finally {
conn = null;
}
LOGGER.fine(String.format("Download is being redirected from %s to %s", url.toString(), location));
conn = URLConnectionFactory.createHttpURLConnection(new URL(location), useProxy);
conn.setRequestProperty("Accept-Encoding", "gzip, deflate");
conn.connect();
status = conn.getResponseCode();
}
}
if (status != 200) {
try {
conn.disconnect();
} finally {
conn = null;
}
final String msg = String.format("Error downloading file %s; received response code %s.", url.toString(), status);
throw new DownloadFailedException(msg);
}
} catch (IOException ex) {
try {
if (conn != null) {
@@ -105,8 +133,8 @@ public final class Downloader {
final String msg = String.format("Error downloading file %s; unable to connect.", url.toString());
throw new DownloadFailedException(msg, ex);
}
final String encoding = conn.getContentEncoding();
final String encoding = conn.getContentEncoding();
BufferedOutputStream writer = null;
InputStream reader = null;
try {
@@ -138,16 +166,14 @@ public final class Downloader {
try {
writer.close();
} catch (IOException ex) {
LOGGER.log(Level.FINEST,
"Error closing the writer in Downloader.", ex);
LOGGER.log(Level.FINEST, "Error closing the writer in Downloader.", ex);
}
}
if (reader != null) {
try {
reader.close();
} catch (IOException ex) {
LOGGER.log(Level.FINEST,
"Error closing the reader in Downloader.", ex);
LOGGER.log(Level.FINEST, "Error closing the reader in Downloader.", ex);
}
}
try {
@@ -160,8 +186,8 @@ public final class Downloader {
}
/**
* Makes an HTTP Head request to retrieve the last modified date of the given URL. If the file:// protocol is
* specified, then the lastTimestamp of the file is returned.
* Makes an HTTP Head request to retrieve the last modified date of the given URL. If the file:// protocol is specified, then
* the lastTimestamp of the file is returned.
*
* @param url the URL to retrieve the timestamp from
* @return an epoch timestamp