org.littleshoot.proxy
Class ProxyUtils

java.lang.Object
  org.littleshoot.proxy.ProxyUtils

public class ProxyUtils
extends Object

Utilities for the proxy.

Field Summary

static String	CONNECT_OK_HEADERS Constant for the headers for an OK response to an HTTP connect request.
static org.jboss.netty.channel.ChannelFutureListener	NO_OP_LISTENER Utility class for a no-op ChannelFutureListener.
static HttpRequestFilter	PASS_THROUGH_REQUEST_FILTER
static String	PATTERN_RFC1036 Date format pattern used to parse HTTP date headers in RFC 1036 format.
static String	PATTERN_RFC1123 Date format pattern used to parse HTTP date headers in RFC 1123 format.
static String	PROXY_ERROR_HEADERS Constant for the headers for a proxy error response.

Method Summary

static void	addVia(org.jboss.netty.handler.codec.http.HttpMessage msg) Adds the Via header to specify that the message has passed through the proxy.
static String	cacheUri(org.jboss.netty.handler.codec.http.HttpRequest httpRequest) Builds the cache URI from the request, including the host and the path.
static void	closeOnFlush(org.jboss.netty.channel.Channel ch) Closes the specified channel after all queued write requests are flushed.
static org.jboss.netty.handler.codec.http.HttpRequest	copyHttpRequest(org.jboss.netty.handler.codec.http.HttpRequest original) Creates a copy of an original HTTP request to void modifying it.
static org.jboss.netty.handler.codec.http.HttpRequest	copyHttpRequest(org.jboss.netty.handler.codec.http.HttpRequest original, boolean keepProxyFormat) Creates a copy of an original HTTP request to void modifying it.
static org.jboss.netty.handler.codec.http.HttpResponse	copyMutableResponseFields(org.jboss.netty.handler.codec.http.HttpResponse original, org.jboss.netty.handler.codec.http.HttpResponse copy) Copies the mutable fields from the response original to the copy.
static Charset	detectCharset(org.jboss.netty.handler.codec.http.HttpResponse http) Detect Charset Encoding of a HttpResponse based on Headers and Meta Tags
static String	formatDate(Date date) Formats the given date according to the RFC 1123 pattern.
static String	formatDate(Date date, String pattern) Formats the given date according to the specified pattern.
static String	httpDate() Creates a Date formatted for HTTP headers for the current time.
static String	parseHostAndPort(org.jboss.netty.handler.codec.http.HttpRequest httpRequest) Parses the host and port an HTTP request is being sent to.
static int	parsePort(org.jboss.netty.handler.codec.http.HttpRequest httpRequest) Parses the port from an address.
static void	printHeader(org.jboss.netty.handler.codec.http.HttpMessage msg, String name) Prints the specified header from the specified method.
static void	printHeaders(org.jboss.netty.handler.codec.http.HttpMessage msg) Prints the headers of the message (for debugging).
static void	stripHopByHopHeaders(org.jboss.netty.handler.codec.http.HttpMessage msg) Removes all headers that should not be forwarded.
static String	stripHost(String uri) Strips the host from a URI string.
static void	writeResponse(org.jboss.netty.channel.Channel channel, String statusLine, String headers) Writes a raw HTTP response to the channel.
static void	writeResponse(org.jboss.netty.channel.Channel channel, String statusLine, String headers, String responseBody) Writes a raw HTTP response to the channel.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

PATTERN_RFC1123

public static final String PATTERN_RFC1123

Date format pattern used to parse HTTP date headers in RFC 1123 format.

See Also:

Constant Field Values

PATTERN_RFC1036

public static final String PATTERN_RFC1036

Date format pattern used to parse HTTP date headers in RFC 1036 format.

See Also:

Constant Field Values

NO_OP_LISTENER

public static final org.jboss.netty.channel.ChannelFutureListener NO_OP_LISTENER

Utility class for a no-op ChannelFutureListener.

CONNECT_OK_HEADERS

public static final String CONNECT_OK_HEADERS

Constant for the headers for an OK response to an HTTP connect request.

PROXY_ERROR_HEADERS

public static final String PROXY_ERROR_HEADERS

Constant for the headers for a proxy error response.

PASS_THROUGH_REQUEST_FILTER

public static final HttpRequestFilter PASS_THROUGH_REQUEST_FILTER

Method Detail

stripHost

public static String stripHost(String uri)

Strips the host from a URI string. This will turn "http://host.com/path" into "/path".

Parameters:

uri - The URI to transform.

Returns:

A string with the URI stripped.

cacheUri

public static String cacheUri(org.jboss.netty.handler.codec.http.HttpRequest httpRequest)

Builds the cache URI from the request, including the host and the path.

Parameters:

httpRequest - The request.

Returns:

The cache URI.

formatDate

public static String formatDate(Date date)

Formats the given date according to the RFC 1123 pattern.

Parameters:

date - The date to format.

Returns:

An RFC 1123 formatted date string.

See Also:

PATTERN_RFC1123

formatDate

public static String formatDate(Date date,
                                String pattern)

Formats the given date according to the specified pattern. The pattern must conform to that used by the simple date format class.

Parameters:

date - The date to format.

pattern - The pattern to use for formatting the date.

Returns:

A formatted date string.

Throws:

IllegalArgumentException - If the given date pattern is invalid.

See Also:

SimpleDateFormat

httpDate

public static String httpDate()

Creates a Date formatted for HTTP headers for the current time.

Returns:

The formatted HTTP date.

copyMutableResponseFields

public static org.jboss.netty.handler.codec.http.HttpResponse copyMutableResponseFields(org.jboss.netty.handler.codec.http.HttpResponse original,
                                                                                        org.jboss.netty.handler.codec.http.HttpResponse copy)

Copies the mutable fields from the response original to the copy.

Parameters:

original - The original response to copy from.

copy - The copy.

Returns:

The copy with all mutable fields from the original.

writeResponse

public static void writeResponse(org.jboss.netty.channel.Channel channel,
                                 String statusLine,
                                 String headers)

Writes a raw HTTP response to the channel.

Parameters:

channel - The channel.

statusLine - The status line of the response.

headers - The raw headers string.

writeResponse

public static void writeResponse(org.jboss.netty.channel.Channel channel,
                                 String statusLine,
                                 String headers,
                                 String responseBody)

Writes a raw HTTP response to the channel.

Parameters:

channel - The channel.

statusLine - The status line of the response.

headers - The raw headers string.

responseBody - The response body.

printHeaders

public static void printHeaders(org.jboss.netty.handler.codec.http.HttpMessage msg)

Prints the headers of the message (for debugging).

Parameters:

msg - The HttpMessage.

printHeader

public static void printHeader(org.jboss.netty.handler.codec.http.HttpMessage msg,
                               String name)

Prints the specified header from the specified method.

Parameters:

msg - The HTTP message.

name - The name of the header to print.

closeOnFlush

public static void closeOnFlush(org.jboss.netty.channel.Channel ch)

Closes the specified channel after all queued write requests are flushed.

Parameters:

ch - The Channel to close.

parseHostAndPort

public static String parseHostAndPort(org.jboss.netty.handler.codec.http.HttpRequest httpRequest)

Parses the host and port an HTTP request is being sent to.

Parameters:

httpRequest - The request.

Returns:

The host and port string.

parsePort

public static int parsePort(org.jboss.netty.handler.codec.http.HttpRequest httpRequest)

Parses the port from an address.

Parameters:

httpRequest - The request containing the URI.

Returns:

The port. If not port is explicitly specified, returns the the default port 80 if the protocol is HTTP and 443 if the protocol is HTTPS.

copyHttpRequest

public static org.jboss.netty.handler.codec.http.HttpRequest copyHttpRequest(org.jboss.netty.handler.codec.http.HttpRequest original,
                                                                             boolean keepProxyFormat)

Creates a copy of an original HTTP request to void modifying it.

Parameters:

original - The original request.

keepProxyFormat - keep proxy-formatted URI (used in chaining)

Returns:

The request copy.

stripHopByHopHeaders

public static void stripHopByHopHeaders(org.jboss.netty.handler.codec.http.HttpMessage msg)

Removes all headers that should not be forwarded. See RFC 2616 13.5.1 End-to-end and Hop-by-hop Headers.

Parameters:

msg - The message to strip headers from.

copyHttpRequest

public static org.jboss.netty.handler.codec.http.HttpRequest copyHttpRequest(org.jboss.netty.handler.codec.http.HttpRequest original)

Creates a copy of an original HTTP request to void modifying it. This variant will unconditionally strip the proxy-formatted request.

Parameters:

original - The original request.

Returns:

The request copy.

addVia

public static void addVia(org.jboss.netty.handler.codec.http.HttpMessage msg)

Adds the Via header to specify that the message has passed through the proxy.

Parameters:

msg - The HTTP message.

detectCharset

public static Charset detectCharset(org.jboss.netty.handler.codec.http.HttpResponse http)

Detect Charset Encoding of a HttpResponse based on Headers and Meta Tags

Parameters:

http - The HTTP Response.