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Limit the access of the HttpHeaders for performance reasons

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This commit is contained in:
Norman Maurer 2013-12-18 13:55:15 +01:00
parent e9f09ea9f5
commit 0052d83db1
1 changed files with 14 additions and 8 deletions
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22
codec-http/src/main/java/io/netty/handler/codec/http/HttpObjectDecoder.java
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@ -110,6 +110,7 @@ public abstract class HttpObjectDecoder extends ReplayingDecoder<HttpObjectDecod
private HttpMessage message;
private long chunkSize;
private int headerSize;
private long contentLength = Long.MIN_VALUE;
private final AppendableCharSequence sb = new AppendableCharSequence(128);
/**
@ -222,7 +223,7 @@ public abstract class HttpObjectDecoder extends ReplayingDecoder<HttpObjectDecod
reset();
return;
}
long contentLength = HttpHeaders.getContentLength(message, -1);
long contentLength = contentLength();
if (contentLength == 0 || contentLength == -1 && isDecodingRequest()) {
out.add(message);
out.add(LastHttpContent.EMPTY_LAST_CONTENT);
@ -236,7 +237,7 @@ public abstract class HttpObjectDecoder extends ReplayingDecoder<HttpObjectDecod
if (nextState == State.READ_FIXED_LENGTH_CONTENT) {
// chunkSize will be decreased as the READ_FIXED_LENGTH_CONTENT state reads data chunk by chunk.
chunkSize = HttpHeaders.getContentLength(message, -1);
chunkSize = contentLength;
}
// We return here, this forces decode to be called again where we will decode the content
@ -371,8 +372,6 @@ public abstract class HttpObjectDecoder extends ReplayingDecoder<HttpObjectDecod
// Handle the last unfinished message.
if (message != null) {
HttpMessage message = this.message;
this.message = null;
// Check if the closure of the connection signifies the end of the content.
boolean prematureClosure;
@ -383,9 +382,9 @@ public abstract class HttpObjectDecoder extends ReplayingDecoder<HttpObjectDecod
// Compare the length of the received content and the 'Content-Length' header.
// If the 'Content-Length' header is absent, the length of the content is determined by the end of the
// connection, so it is perfectly fine.
long expectedContentLength = HttpHeaders.getContentLength(message, -1);
prematureClosure = expectedContentLength > 0;
prematureClosure = contentLength() > 0;
}
reset();
if (!prematureClosure) {
out.add(LastHttpContent.EMPTY_LAST_CONTENT);
@ -419,7 +418,7 @@ public abstract class HttpObjectDecoder extends ReplayingDecoder<HttpObjectDecod
private void reset() {
HttpMessage message = this.message;
this.message = null;
contentLength = Long.MIN_VALUE;
if (!isDecodingRequest()) {
HttpResponse res = (HttpResponse) message;
if (res != null && res.getStatus().code() == 101) {
@ -499,7 +498,7 @@ public abstract class HttpObjectDecoder extends ReplayingDecoder<HttpObjectDecod
nextState = State.SKIP_CONTROL_CHARS;
} else if (HttpHeaders.isTransferEncodingChunked(message)) {
nextState = State.READ_CHUNK_SIZE;
} else if (HttpHeaders.getContentLength(message, -1) >= 0) {
} else if (contentLength() >= 0) {
nextState = State.READ_FIXED_LENGTH_CONTENT;
} else {
nextState = State.READ_VARIABLE_LENGTH_CONTENT;
@ -507,6 +506,13 @@ public abstract class HttpObjectDecoder extends ReplayingDecoder<HttpObjectDecod
return nextState;
}
private long contentLength() {
if (contentLength == Long.MIN_VALUE) {
contentLength = HttpHeaders.getContentLength(message, -1);
}
return contentLength;
}
private LastHttpContent readTrailingHeaders(ByteBuf buffer) {
headerSize = 0;
AppendableCharSequence line = readHeader(buffer);