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markt pushed a commit to branch 7.0.x
in repository https://gitbox.apache.org/repos/asf/tomcat.git
The following commit(s) were added to refs/heads/7.0.x by this push:
new 917b3b4 Refactor sis.available() for more accurate return value
917b3b4 is described below
commit 917b3b402a512bb9a432a972499fd49b5f984cb3
Author: Mark Thomas <[email protected]>
AuthorDate: Mon Jul 6 19:33:00 2020 +0100
Refactor sis.available() for more accurate return value
---
java/org/apache/coyote/InputBuffer.java | 9 +++++++++
java/org/apache/coyote/ajp/AbstractAjpProcessor.java | 14 +++++++++-----
java/org/apache/coyote/http11/InputFilter.java | 11 +----------
java/org/apache/coyote/http11/InternalAprInputBuffer.java | 14 ++++++++++----
java/org/apache/coyote/http11/InternalInputBuffer.java | 14 ++++++++++----
java/org/apache/coyote/http11/InternalNioInputBuffer.java | 14 ++++++++++----
.../apache/coyote/http11/filters/BufferedInputFilter.java | 9 +++++++--
.../apache/coyote/http11/filters/ChunkedInputFilter.java | 8 +++++++-
.../apache/coyote/http11/filters/IdentityInputFilter.java | 3 ++-
webapps/docs/changelog.xml | 9 +++++++++
10 files changed, 74 insertions(+), 31 deletions(-)
diff --git a/java/org/apache/coyote/InputBuffer.java
b/java/org/apache/coyote/InputBuffer.java
index a38cc5c..cbb502f 100644
--- a/java/org/apache/coyote/InputBuffer.java
+++ b/java/org/apache/coyote/InputBuffer.java
@@ -45,4 +45,13 @@ public interface InputBuffer {
throws IOException;
+ /**
+ * Obtain an estimate of the number of bytes that can be read without
+ * blocking. Typically, this will be the number of available bytes known to
+ * be buffered.
+ *
+ * @return The number of bytes that can be read without blocking
+ */
+ public int available();
+
}
diff --git a/java/org/apache/coyote/ajp/AbstractAjpProcessor.java
b/java/org/apache/coyote/ajp/AbstractAjpProcessor.java
index 7016e41..93d01c3 100644
--- a/java/org/apache/coyote/ajp/AbstractAjpProcessor.java
+++ b/java/org/apache/coyote/ajp/AbstractAjpProcessor.java
@@ -1218,20 +1218,17 @@ public abstract class AbstractAjpProcessor<S> extends
AbstractProcessor<S> {
// ------------------------------------- InputStreamInputBuffer Inner Class
-
/**
* This class is an input buffer which will read its data from an input
* stream.
*/
protected class SocketInputBuffer implements InputBuffer {
-
/**
* Read bytes into the specified chunk.
*/
@Override
- public int doRead(ByteChunk chunk, Request req)
- throws IOException {
+ public int doRead(ByteChunk chunk, Request req) throws IOException {
if (endOfStream) {
return -1;
@@ -1250,9 +1247,16 @@ public abstract class AbstractAjpProcessor<S> extends
AbstractProcessor<S> {
chunk.setBytes(bc.getBuffer(), bc.getStart(), bc.getLength());
empty = true;
return chunk.getLength();
-
}
+ @Override
+ public int available() {
+ if (empty) {
+ return 0;
+ } else {
+ return bodyBytes.getByteChunk().getLength();
+ }
+ }
}
diff --git a/java/org/apache/coyote/http11/InputFilter.java
b/java/org/apache/coyote/http11/InputFilter.java
index a90c88b..a854ffe 100644
--- a/java/org/apache/coyote/http11/InputFilter.java
+++ b/java/org/apache/coyote/http11/InputFilter.java
@@ -75,14 +75,5 @@ public interface InputFilter extends InputBuffer {
* to consume extra bytes. The result of this method can't be negative (if
* an error happens, an IOException should be thrown instead).
*/
- public long end()
- throws IOException;
-
-
- /**
- * Amount of bytes still available in a buffer.
- */
- public int available();
-
-
+ public long end() throws IOException;
}
diff --git a/java/org/apache/coyote/http11/InternalAprInputBuffer.java
b/java/org/apache/coyote/http11/InternalAprInputBuffer.java
index 6f153a9..3921015 100644
--- a/java/org/apache/coyote/http11/InternalAprInputBuffer.java
+++ b/java/org/apache/coyote/http11/InternalAprInputBuffer.java
@@ -686,14 +686,11 @@ public class InternalAprInputBuffer extends
AbstractInputBuffer<Long> {
// ------------------------------------- InputStreamInputBuffer Inner Class
-
/**
* This class is an input buffer which will read its data from an input
* stream.
*/
- protected class SocketInputBuffer
- implements InputBuffer {
-
+ protected class SocketInputBuffer implements InputBuffer {
/**
* Read bytes into the specified chunk.
@@ -713,5 +710,14 @@ public class InternalAprInputBuffer extends
AbstractInputBuffer<Long> {
return (length);
}
+
+ @Override
+ public int available() {
+ if (lastValid > pos) {
+ return lastValid - pos;
+ } else {
+ return 0;
+ }
+ }
}
}
diff --git a/java/org/apache/coyote/http11/InternalInputBuffer.java
b/java/org/apache/coyote/http11/InternalInputBuffer.java
index 4782d50..48bdc85 100644
--- a/java/org/apache/coyote/http11/InternalInputBuffer.java
+++ b/java/org/apache/coyote/http11/InternalInputBuffer.java
@@ -595,14 +595,11 @@ public class InternalInputBuffer extends
AbstractInputBuffer<Socket> {
// ------------------------------------- InputStreamInputBuffer Inner Class
-
/**
* This class is an input buffer which will read its data from an input
* stream.
*/
- protected class InputStreamInputBuffer
- implements InputBuffer {
-
+ protected class InputStreamInputBuffer implements InputBuffer {
/**
* Read bytes into the specified chunk.
@@ -622,5 +619,14 @@ public class InternalInputBuffer extends
AbstractInputBuffer<Socket> {
return (length);
}
+
+ @Override
+ public int available() {
+ if (lastValid > pos) {
+ return lastValid - pos;
+ } else {
+ return 0;
+ }
+ }
}
}
diff --git a/java/org/apache/coyote/http11/InternalNioInputBuffer.java
b/java/org/apache/coyote/http11/InternalNioInputBuffer.java
index 1da4c4c..339e186 100644
--- a/java/org/apache/coyote/http11/InternalNioInputBuffer.java
+++ b/java/org/apache/coyote/http11/InternalNioInputBuffer.java
@@ -867,14 +867,11 @@ public class InternalNioInputBuffer extends
AbstractInputBuffer<NioChannel> {
// ------------------------------------- InputStreamInputBuffer Inner Class
-
/**
* This class is an input buffer which will read its data from an input
* stream.
*/
- protected class SocketInputBuffer
- implements InputBuffer {
-
+ protected class SocketInputBuffer implements InputBuffer {
/**
* Read bytes into the specified chunk.
@@ -894,5 +891,14 @@ public class InternalNioInputBuffer extends
AbstractInputBuffer<NioChannel> {
return (length);
}
+
+ @Override
+ public int available() {
+ if (lastValid > pos) {
+ return lastValid - pos;
+ } else {
+ return 0;
+ }
+ }
}
}
diff --git a/java/org/apache/coyote/http11/filters/BufferedInputFilter.java
b/java/org/apache/coyote/http11/filters/BufferedInputFilter.java
index 4b393a6..e10dcb5 100644
--- a/java/org/apache/coyote/http11/filters/BufferedInputFilter.java
+++ b/java/org/apache/coyote/http11/filters/BufferedInputFilter.java
@@ -137,7 +137,12 @@ public class BufferedInputFilter implements InputFilter {
@Override
public int available() {
- return buffered.getLength();
+ int available = buffered.getLength();
+ if (available == 0) {
+ // No data buffered here. Try the next filter in the chain.
+ return buffer.available();
+ } else {
+ return available;
+ }
}
-
}
diff --git a/java/org/apache/coyote/http11/filters/ChunkedInputFilter.java
b/java/org/apache/coyote/http11/filters/ChunkedInputFilter.java
index 05e7680..5697512 100644
--- a/java/org/apache/coyote/http11/filters/ChunkedInputFilter.java
+++ b/java/org/apache/coyote/http11/filters/ChunkedInputFilter.java
@@ -265,7 +265,13 @@ public class ChunkedInputFilter implements InputFilter {
*/
@Override
public int available() {
- return lastValid - pos;
+ int available = lastValid - pos;
+ if (available == 0) {
+ // No data buffered here. Try the next filter in the chain.
+ return buffer.available();
+ } else {
+ return available;
+ }
}
diff --git a/java/org/apache/coyote/http11/filters/IdentityInputFilter.java
b/java/org/apache/coyote/http11/filters/IdentityInputFilter.java
index f5f6cd0..79570c6 100644
--- a/java/org/apache/coyote/http11/filters/IdentityInputFilter.java
+++ b/java/org/apache/coyote/http11/filters/IdentityInputFilter.java
@@ -209,7 +209,8 @@ public class IdentityInputFilter implements InputFilter {
*/
@Override
public int available() {
- return 0;
+ // No data buffered here. Try the next filter in the chain.
+ return buffer.available();
}
diff --git a/webapps/docs/changelog.xml b/webapps/docs/changelog.xml
index bcac7a0..c7ad12a 100644
--- a/webapps/docs/changelog.xml
+++ b/webapps/docs/changelog.xml
@@ -60,6 +60,15 @@
issues do not "pop up" wrt. others).
-->
<section name="Tomcat 7.0.106 (violetagg)" rtext="in development">
+ <subsection name="Coyote">
+ <changelog>
+ <fix>
+ Refactor the implementation of
+ <code>ServletInputStream.available()</code> to provide a more accurate
+ return value, particularly when end of stream has been reached. (markt)
+ </fix>
+ </changelog>
+ </subsection>
<subsection name="WebSocket">
<changelog>
<fix>
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