/* 75: */
/* 76: */ public int compareToVersion(ProtocolVersion that) /* 77: */ {
/* 78:209 */ if (that == null) {
/* 79:210 */ throw new IllegalArgumentException("Protocol version must not be null.");
/* 80: */ }
/* 81:213 */ if (!this.protocol.equals(that.protocol)) {
/* 82:214 */ throw new IllegalArgumentException(
"Versions for different protocols cannot be compared. " + this + " " + that);
/* 83: */ }
/* 84:219 */ int delta = getMajor() - that.getMajor();
/* 85:220 */ if (delta == 0) {
/* 86:221 */ delta = getMinor() - that.getMinor();
/* 87: */ }
/* 88:223 */ return delta;
/* 89: */ }
/**
* Compares this protocol version with another one. Only protocol versions with the same protocol
* name can be compared. This method does <i>not</i> define a total ordering, as it would be
* required for {@link java.lang.Comparable}.
*
* @param that the protocl version to compare with
* @return a negative integer, zero, or a positive integer as this version is less than, equal to,
* or greater than the argument version.
* @throws IllegalArgumentException if the argument has a different protocol name than this
* object, or if the argument is <code>null</code>
*/
public int compareToVersion(ProtocolVersion that) {
if (that == null) {
throw new IllegalArgumentException("Protocol version must not be null.");
}
if (!this.protocol.equals(that.protocol)) {
throw new IllegalArgumentException(
"Versions for different protocols cannot be compared. " + this + " " + that);
}
int delta = getMajor() - that.getMajor();
if (delta == 0) {
delta = getMinor() - that.getMinor();
}
return delta;
}
/**
* Opens the connection to a http server or proxy.
*
* @return the opened low level connection
* @throws IOException if the connection fails for any reason.
*/
@Override
AndroidHttpClientConnection openConnection(Request req) throws IOException {
SSLSocket sslSock = null;
if (mProxyHost != null) {
// If we have a proxy set, we first send a CONNECT request
// to the proxy; if the proxy returns 200 OK, we negotiate
// a secure connection to the target server via the proxy.
// If the request fails, we drop it, but provide the event
// handler with the response status and headers. The event
// handler is then responsible for cancelling the load or
// issueing a new request.
AndroidHttpClientConnection proxyConnection = null;
Socket proxySock = null;
try {
proxySock = new Socket(mProxyHost.getHostName(), mProxyHost.getPort());
proxySock.setSoTimeout(60 * 1000);
proxyConnection = new AndroidHttpClientConnection();
HttpParams params = new BasicHttpParams();
HttpConnectionParams.setSocketBufferSize(params, 8192);
proxyConnection.bind(proxySock, params);
} catch (IOException e) {
if (proxyConnection != null) {
proxyConnection.close();
}
String errorMessage = e.getMessage();
if (errorMessage == null) {
errorMessage = "failed to establish a connection to the proxy";
}
throw new IOException(errorMessage);
}
StatusLine statusLine = null;
int statusCode = 0;
Headers headers = new Headers();
try {
BasicHttpRequest proxyReq = new BasicHttpRequest("CONNECT", mHost.toHostString());
// add all 'proxy' headers from the original request, we also need
// to add 'host' header unless we want proxy to answer us with a
// 400 Bad Request
for (Header h : req.mHttpRequest.getAllHeaders()) {
String headerName = h.getName().toLowerCase(Locale.ROOT);
if (headerName.startsWith("proxy")
|| headerName.equals("keep-alive")
|| headerName.equals("host")) {
proxyReq.addHeader(h);
}
}
proxyConnection.sendRequestHeader(proxyReq);
proxyConnection.flush();
// it is possible to receive informational status
// codes prior to receiving actual headers;
// all those status codes are smaller than OK 200
// a loop is a standard way of dealing with them
do {
statusLine = proxyConnection.parseResponseHeader(headers);
statusCode = statusLine.getStatusCode();
} while (statusCode < HttpStatus.SC_OK);
} catch (ParseException e) {
String errorMessage = e.getMessage();
if (errorMessage == null) {
errorMessage = "failed to send a CONNECT request";
}
throw new IOException(errorMessage);
} catch (HttpException e) {
String errorMessage = e.getMessage();
if (errorMessage == null) {
errorMessage = "failed to send a CONNECT request";
}
throw new IOException(errorMessage);
} catch (IOException e) {
String errorMessage = e.getMessage();
if (errorMessage == null) {
errorMessage = "failed to send a CONNECT request";
}
throw new IOException(errorMessage);
}
if (statusCode == HttpStatus.SC_OK) {
try {
sslSock =
(SSLSocket)
getSocketFactory()
.createSocket(proxySock, mHost.getHostName(), mHost.getPort(), true);
} catch (IOException e) {
if (sslSock != null) {
sslSock.close();
}
String errorMessage = e.getMessage();
if (errorMessage == null) {
errorMessage = "failed to create an SSL socket";
}
throw new IOException(errorMessage);
}
} else {
// if the code is not OK, inform the event handler
ProtocolVersion version = statusLine.getProtocolVersion();
req.mEventHandler.status(
version.getMajor(), version.getMinor(), statusCode, statusLine.getReasonPhrase());
req.mEventHandler.headers(headers);
req.mEventHandler.endData();
proxyConnection.close();
// here, we return null to indicate that the original
// request needs to be dropped
return null;
}
} else {
// if we do not have a proxy, we simply connect to the host
try {
sslSock = (SSLSocket) getSocketFactory().createSocket(mHost.getHostName(), mHost.getPort());
sslSock.setSoTimeout(SOCKET_TIMEOUT);
} catch (IOException e) {
if (sslSock != null) {
sslSock.close();
}
String errorMessage = e.getMessage();
if (errorMessage == null) {
errorMessage = "failed to create an SSL socket";
}
throw new IOException(errorMessage);
}
}
// do handshake and validate server certificates
SslError error =
CertificateChainValidator.getInstance()
.doHandshakeAndValidateServerCertificates(this, sslSock, mHost.getHostName());
// Inform the user if there is a problem
if (error != null) {
// handleSslErrorRequest may immediately unsuspend if it wants to
// allow the certificate anyway.
// So we mark the connection as suspended, call handleSslErrorRequest
// then check if we're still suspended and only wait if we actually
// need to.
synchronized (mSuspendLock) {
mSuspended = true;
}
// don't hold the lock while calling out to the event handler
boolean canHandle = req.getEventHandler().handleSslErrorRequest(error);
if (!canHandle) {
throw new IOException("failed to handle " + error);
}
synchronized (mSuspendLock) {
if (mSuspended) {
try {
// Put a limit on how long we are waiting; if the timeout
// expires (which should never happen unless you choose
// to ignore the SSL error dialog for a very long time),
// we wake up the thread and abort the request. This is
// to prevent us from stalling the network if things go
// very bad.
mSuspendLock.wait(10 * 60 * 1000);
if (mSuspended) {
// mSuspended is true if we have not had a chance to
// restart the connection yet (ie, the wait timeout
// has expired)
mSuspended = false;
mAborted = true;
if (HttpLog.LOGV) {
HttpLog.v(
"HttpsConnection.openConnection():"
+ " SSL timeout expired and request was cancelled!!!");
}
}
} catch (InterruptedException e) {
// ignore
}
}
if (mAborted) {
// The user decided not to use this unverified connection
// so close it immediately.
sslSock.close();
throw new SSLConnectionClosedByUserException("connection closed by the user");
}
}
}
// All went well, we have an open, verified connection.
AndroidHttpClientConnection conn = new AndroidHttpClientConnection();
BasicHttpParams params = new BasicHttpParams();
params.setIntParameter(HttpConnectionParams.SOCKET_BUFFER_SIZE, 8192);
conn.bind(sslSock, params);
return conn;
}
/**
* Implements a patch out in 4.1.x and 4.2 that isn't available in 4.0.x which fixes a bug where
* connections aren't reused when the response is gzipped. See
* https://issues.apache.org/jira/browse/HTTPCORE-257 for info about the issue, and
* http://svn.apache.org/viewvc?view=revision&revision=1124215 for the patch which is copied
* here.
*/
@Override
public boolean keepAlive(final HttpResponse response, final HttpContext context) {
if (response == null) {
throw new IllegalArgumentException("HTTP response may not be null.");
}
if (context == null) {
throw new IllegalArgumentException("HTTP context may not be null.");
}
// Check for a self-terminating entity. If the end of the entity
// will
// be indicated by closing the connection, there is no keep-alive.
ProtocolVersion ver = response.getStatusLine().getProtocolVersion();
Header teh = response.getFirstHeader(HTTP.TRANSFER_ENCODING);
if (teh != null) {
if (!HTTP.CHUNK_CODING.equalsIgnoreCase(teh.getValue())) {
return false;
}
} else {
Header[] clhs = response.getHeaders(HTTP.CONTENT_LEN);
// Do not reuse if not properly content-length delimited
if (clhs == null || clhs.length != 1) {
return false;
}
Header clh = clhs[0];
try {
int contentLen = Integer.parseInt(clh.getValue());
if (contentLen < 0) {
return false;
}
} catch (NumberFormatException ex) {
return false;
}
}
// Check for the "Connection" header. If that is absent, check for
// the "Proxy-Connection" header. The latter is an unspecified and
// broken but unfortunately common extension of HTTP.
HeaderIterator hit = response.headerIterator(HTTP.CONN_DIRECTIVE);
if (!hit.hasNext()) hit = response.headerIterator("Proxy-Connection");
// Experimental usage of the "Connection" header in HTTP/1.0 is
// documented in RFC 2068, section 19.7.1. A token "keep-alive" is
// used to indicate that the connection should be persistent.
// Note that the final specification of HTTP/1.1 in RFC 2616 does
// not
// include this information. Neither is the "Connection" header
// mentioned in RFC 1945, which informally describes HTTP/1.0.
//
// RFC 2616 specifies "close" as the only connection token with a
// specific meaning: it disables persistent connections.
//
// The "Proxy-Connection" header is not formally specified anywhere,
// but is commonly used to carry one token, "close" or "keep-alive".
// The "Connection" header, on the other hand, is defined as a
// sequence of tokens, where each token is a header name, and the
// token "close" has the above-mentioned additional meaning.
//
// To get through this mess, we treat the "Proxy-Connection" header
// in exactly the same way as the "Connection" header, but only if
// the latter is missing. We scan the sequence of tokens for both
// "close" and "keep-alive". As "close" is specified by RFC 2068,
// it takes precedence and indicates a non-persistent connection.
// If there is no "close" but a "keep-alive", we take the hint.
if (hit.hasNext()) {
try {
TokenIterator ti = createTokenIterator(hit);
boolean keepalive = false;
while (ti.hasNext()) {
final String token = ti.nextToken();
if (HTTP.CONN_CLOSE.equalsIgnoreCase(token)) {
return false;
} else if (HTTP.CONN_KEEP_ALIVE.equalsIgnoreCase(token)) {
// continue the loop, there may be a "close"
// afterwards
keepalive = true;
}
}
if (keepalive) return true;
// neither "close" nor "keep-alive", use default policy
} catch (ParseException px) {
// invalid connection header means no persistent connection
// we don't have logging in HttpCore, so the exception is
// lost
return false;
}
}
// default since HTTP/1.1 is persistent, before it was
// non-persistent
return !ver.lessEquals(HttpVersion.HTTP_1_0);
}
/**
* Handles receives one HTTP request over the given connection within the given execution context
* and sends a response back to the client.
*
* @param conn the active connection to the client
* @param context the actual execution context.
* @throws IOException in case of an I/O error.
* @throws HttpException in case of HTTP protocol violation or a processing problem.
*/
public void handleRequest(final HttpServerConnection conn, final HttpContext context)
throws IOException, HttpException {
context.setAttribute(ExecutionContext.HTTP_CONNECTION, conn);
HttpResponse response = null;
try {
HttpRequest request = conn.receiveRequestHeader();
request.setParams(new DefaultedHttpParams(request.getParams(), this.params));
ProtocolVersion ver = request.getRequestLine().getProtocolVersion();
if (!ver.lessEquals(HttpVersion.HTTP_1_1)) {
// Downgrade protocol version if greater than HTTP/1.1
ver = HttpVersion.HTTP_1_1;
}
if (request instanceof HttpEntityEnclosingRequest) {
if (((HttpEntityEnclosingRequest) request).expectContinue()) {
response = this.responseFactory.newHttpResponse(ver, HttpStatus.SC_CONTINUE, context);
response.setParams(new DefaultedHttpParams(response.getParams(), this.params));
if (this.expectationVerifier != null) {
try {
this.expectationVerifier.verify(request, response, context);
} catch (HttpException ex) {
response =
this.responseFactory.newHttpResponse(
HttpVersion.HTTP_1_0, HttpStatus.SC_INTERNAL_SERVER_ERROR, context);
response.setParams(new DefaultedHttpParams(response.getParams(), this.params));
handleException(ex, response);
}
}
if (response.getStatusLine().getStatusCode() < 200) {
// Send 1xx response indicating the server expections
// have been met
conn.sendResponseHeader(response);
conn.flush();
response = null;
conn.receiveRequestEntity((HttpEntityEnclosingRequest) request);
}
} else {
conn.receiveRequestEntity((HttpEntityEnclosingRequest) request);
}
}
if (response == null) {
response = this.responseFactory.newHttpResponse(ver, HttpStatus.SC_OK, context);
response.setParams(new DefaultedHttpParams(response.getParams(), this.params));
context.setAttribute(ExecutionContext.HTTP_REQUEST, request);
context.setAttribute(ExecutionContext.HTTP_RESPONSE, response);
this.processor.process(request, context);
doService(request, response, context);
}
// Make sure the request content is fully consumed
if (request instanceof HttpEntityEnclosingRequest) {
HttpEntity entity = ((HttpEntityEnclosingRequest) request).getEntity();
if (entity != null) {
entity.consumeContent();
}
}
} catch (HttpException ex) {
response =
this.responseFactory.newHttpResponse(
HttpVersion.HTTP_1_0, HttpStatus.SC_INTERNAL_SERVER_ERROR, context);
response.setParams(new DefaultedHttpParams(response.getParams(), this.params));
handleException(ex, response);
}
this.processor.process(response, context);
conn.sendResponseHeader(response);
conn.sendResponseEntity(response);
conn.flush();
if (!this.connStrategy.keepAlive(response, context)) {
conn.close();
}
}
