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EA-43926 - MJE: JsonReader.syntaxError
This commit is contained in:
Sergey Simonchik
2013-02-19 15:46:26 +04:00
parent 38cececca4
commit 0cd5b6b48d
1 changed files with 46 additions and 8 deletions
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platform/lang-impl/src/com/intellij/platform/templates/github/DownloadUtil.java
+46 -8
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@@ -7,6 +7,7 @@ import com.intellij.openapi.project.Project;
import com.intellij.openapi.util.Ref;
import com.intellij.openapi.util.io.FileUtil;
import com.intellij.util.Producer;
import com.intellij.util.containers.Predicate;
import com.intellij.util.net.HttpConfigurable;
import com.intellij.util.net.NetUtils;
import org.jetbrains.annotations.NotNull;
@@ -27,25 +28,62 @@ public class DownloadUtil {
private static final Logger LOG = Logger.getInstance(DownloadUtil.class);
/**
* Downloads content of {@code url} to {@code outputFile} and uses .
* Downloads content of {@code url} to {@code outputFile} atomically.<br/>
* {@code outputFile} isn't modified if an I/O error occurs or {@code contentChecker} is provided and returns false on the downloaded content.
* More formally, the steps are:
* <ol>
* <li>Download {@code url} to {@code tempFile}. Stop in case of any I/O errors.</li>
* <li>Stop if {@code contentChecker} is provided, and it returns false on the downloaded content.</li>
* <li>Move {@code tempFile} to {@code outputFile}. On most OS this operation is done atomically.</li>
* </ol>
*
* Motivation: some web filtering products return pure HTML with HTTP 200 OK status instead of
* the asked content.
*
* @param indicator progress indicator
* @param url url to download
* @param outputFile output file
* @param tempFile temporary file to download to. This file is deleted on method exit.
* @param contentChecker checks whether the downloaded content is OK or not
* @returns true if no {@code contentChecker} is provided or the provided one returned true
* @throws IOException if an I/O error occurs
*/
public static boolean downloadAtomically(@Nullable ProgressIndicator indicator,
@NotNull String url,
@NotNull File outputFile,
@NotNull File tempFile,
@Nullable Predicate<String> contentChecker) throws IOException
{
try {
downloadContentToFile(indicator, url, tempFile);
if (contentChecker != null) {
String content = FileUtil.loadFile(tempFile);
if (!contentChecker.apply(content)) {
return false;
}
}
FileUtil.rename(tempFile, outputFile);
return true;
} finally {
FileUtil.delete(tempFile);
}
}
/**
* Downloads content of {@code url} to {@code outputFile} atomically.
* {@code outputFile} won't be modified in case of any I/O download errors.
*
* @param indicator progress indicator
* @param url url to download
* @param outputFile output file
* @param tempFile temporary file to download to. This file will be removed on method exit.
* @param tempFile temporary file to download to. This file is deleted on method exit.
*/
public static void downloadAtomically(@Nullable ProgressIndicator indicator,
@NotNull String url,
@NotNull File outputFile,
@NotNull File tempFile) throws IOException
{
try {
downloadContentToFile(indicator, url, tempFile);
FileUtil.rename(tempFile, outputFile);
} finally {
FileUtil.delete(tempFile);
}
downloadAtomically(indicator, url, outputFile, tempFile, null);
}