Author: markt
Date: Tue Mar 29 22:12:00 2011
New Revision: 1086783
URL: http://svn.apache.org/viewvc?rev=1086783&view=rev
Log:
HTTP range requests cannot be reliably served when a Writer is in use so
prevent the DefaultServlet from attempting to do so.
This is kkolinko's patch that stemmed from a private discussion about a TCK
test.
Modified:
tomcat/trunk/java/org/apache/catalina/servlets/DefaultServlet.java
tomcat/trunk/webapps/docs/changelog.xml
Modified: tomcat/trunk/java/org/apache/catalina/servlets/DefaultServlet.java
URL:
http://svn.apache.org/viewvc/tomcat/trunk/java/org/apache/catalina/servlets/DefaultServlet.java?rev=1086783&r1=1086782&r2=1086783&view=diff
==============================================================================
--- tomcat/trunk/java/org/apache/catalina/servlets/DefaultServlet.java
(original)
+++ tomcat/trunk/java/org/apache/catalina/servlets/DefaultServlet.java Tue Mar
29 22:12:00 2011
@@ -876,6 +876,8 @@ public class DefaultServlet
|| (contentType.startsWith("text"))
|| (contentType.endsWith("xml")) ) {
writer = response.getWriter();
+ // Cannot reliably serve partial content with a Writer
+ ranges = FULL;
} else {
throw e;
}
@@ -896,7 +898,8 @@ public class DefaultServlet
contentType + "'");
response.setContentType(contentType);
}
- if ((cacheEntry.resource != null) && (contentLength >= 0)) {
+ if ((cacheEntry.resource != null) && (contentLength >= 0)
+ && (!serveContent || ostream != null)) {
if (debug > 0)
log("DefaultServlet.serveFile: contentLength=" +
contentLength);
@@ -974,7 +977,8 @@ public class DefaultServlet
if (!checkSendfile(request, response, cacheEntry,
range.end - range.start + 1, range))
copy(cacheEntry, ostream, range);
} else {
- copy(cacheEntry, writer, range);
+ // we should not get here
+ throw new IllegalStateException();
}
}
@@ -993,8 +997,8 @@ public class DefaultServlet
copy(cacheEntry, ostream, ranges.iterator(),
contentType);
} else {
- copy(cacheEntry, writer, ranges.iterator(),
- contentType);
+ // we should not get here
+ throw new IllegalStateException();
}
}
@@ -1939,44 +1943,6 @@ public class DefaultServlet
* (even in the face of an exception).
*
* @param cacheEntry The cache entry for the source resource
- * @param writer The writer to write to
- * @param range Range the client wanted to retrieve
- * @exception IOException if an input/output error occurs
- */
- protected void copy(CacheEntry cacheEntry, PrintWriter writer,
- Range range)
- throws IOException {
-
- IOException exception = null;
-
- InputStream resourceInputStream = cacheEntry.resource.streamContent();
-
- Reader reader;
- if (fileEncoding == null) {
- reader = new InputStreamReader(resourceInputStream);
- } else {
- reader = new InputStreamReader(resourceInputStream,
- fileEncoding);
- }
-
- exception = copyRange(reader, writer, range.start, range.end);
-
- // Clean up the input stream
- reader.close();
-
- // Rethrow any exception that has occurred
- if (exception != null)
- throw exception;
-
- }
-
-
- /**
- * Copy the contents of the specified input stream to the specified
- * output stream, and ensure that both streams are closed before returning
- * (even in the face of an exception).
- *
- * @param cacheEntry The cache entry for the source resource
* @param ostream The output stream to write to
* @param ranges Enumeration of the ranges the client wanted to retrieve
* @param contentType Content type of the resource
@@ -2029,65 +1995,6 @@ public class DefaultServlet
* output stream, and ensure that both streams are closed before returning
* (even in the face of an exception).
*
- * @param cacheEntry The cache entry for the source resource
- * @param writer The writer to write to
- * @param ranges Enumeration of the ranges the client wanted to retrieve
- * @param contentType Content type of the resource
- * @exception IOException if an input/output error occurs
- */
- protected void copy(CacheEntry cacheEntry, PrintWriter writer,
- Iterator<Range> ranges, String contentType)
- throws IOException {
-
- IOException exception = null;
-
- while ( (exception == null) && (ranges.hasNext()) ) {
-
- InputStream resourceInputStream =
cacheEntry.resource.streamContent();
-
- Reader reader;
- if (fileEncoding == null) {
- reader = new InputStreamReader(resourceInputStream);
- } else {
- reader = new InputStreamReader(resourceInputStream,
- fileEncoding);
- }
-
- Range currentRange = ranges.next();
-
- // Writing MIME header.
- writer.println();
- writer.println("--" + mimeSeparation);
- if (contentType != null)
- writer.println("Content-Type: " + contentType);
- writer.println("Content-Range: bytes " + currentRange.start
- + "-" + currentRange.end + "/"
- + currentRange.length);
- writer.println();
-
- // Printing content
- exception = copyRange(reader, writer, currentRange.start,
- currentRange.end);
-
- reader.close();
-
- }
-
- writer.println();
- writer.print("--" + mimeSeparation + "--");
-
- // Rethrow any exception that has occurred
- if (exception != null)
- throw exception;
-
- }
-
-
- /**
- * Copy the contents of the specified input stream to the specified
- * output stream, and ensure that both streams are closed before returning
- * (even in the face of an exception).
- *
* @param istream The input stream to read from
* @param ostream The output stream to write to
* @return Exception which occurred during processing
@@ -2205,60 +2112,6 @@ public class DefaultServlet
}
- /**
- * Copy the contents of the specified input stream to the specified
- * output stream, and ensure that both streams are closed before returning
- * (even in the face of an exception).
- *
- * @param reader The reader to read from
- * @param writer The writer to write to
- * @param start Start of the range which will be copied
- * @param end End of the range which will be copied
- * @return Exception which occurred during processing
- */
- protected IOException copyRange(Reader reader, PrintWriter writer,
- long start, long end) {
-
- long skipped = 0;
- try {
- skipped = reader.skip(start);
- } catch (IOException e) {
- return e;
- }
- if (skipped < start) {
- return new IOException(sm.getString("defaultservlet.skipfail",
- Long.valueOf(skipped), Long.valueOf(start)));
- }
-
- IOException exception = null;
- long bytesToRead = end - start + 1;
-
- char buffer[] = new char[input];
- int len = buffer.length;
- while ( (bytesToRead > 0) && (len >= buffer.length)) {
- try {
- len = reader.read(buffer);
- if (bytesToRead >= len) {
- writer.write(buffer, 0, len);
- bytesToRead -= len;
- } else {
- writer.write(buffer, 0, (int) bytesToRead);
- bytesToRead = 0;
- }
- } catch (IOException e) {
- exception = e;
- len = -1;
- }
- if (len < buffer.length)
- break;
- }
-
- return exception;
-
- }
-
-
-
// ------------------------------------------------------ Range Inner Class
Modified: tomcat/trunk/webapps/docs/changelog.xml
URL:
http://svn.apache.org/viewvc/tomcat/trunk/webapps/docs/changelog.xml?rev=1086783&r1=1086782&r2=1086783&view=diff
==============================================================================
--- tomcat/trunk/webapps/docs/changelog.xml (original)
+++ tomcat/trunk/webapps/docs/changelog.xml Tue Mar 29 22:12:00 2011
@@ -99,6 +99,10 @@
as integrated Windows authentication. This is a work in progress. See
the documentation for details. (markt)
</add>
+ <fix>
+ HTTP range requests cannot be reliably served when a Writer is in use
so
+ prevent the DefaultServlet from attempting to do so. (kkolinko)
+ </fix>
</changelog>
</subsection>
<subsection name="Coyote">
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