org.springframework.http

Class HttpRange

java.lang.Object

org.springframework.http.HttpRange

Direct Known Subclasses:

HttpRange.ByteRange, HttpRange.SuffixByteRange

public abstract class HttpRange
extends java.lang.Object

Represents an HTTP (byte) range for use with the HTTP "Range" header.

Since:

4.2

Author:

Arjen Poutsma, Juergen Hoeller

See Also:

HTTP/1.1: Range Requests, HttpHeaders.setRange(List), HttpHeaders.getRange()

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
private static class	HttpRange.ByteRange Represents an HTTP/1.1 byte range, with a first and optional last position.
private static class	HttpRange.SuffixByteRange Represents an HTTP/1.1 suffix byte range, with a number of suffix bytes.

Field Summary

Fields

Modifier and Type	Field and Description
private static java.lang.String	BYTE_RANGE_PREFIX

Constructor Summary

Constructors

Constructor and Description
HttpRange()

Method Summary

Modifier and Type	Method and Description
static HttpRange	createByteRange(long firstBytePos) Create an HttpRange from the given position to the end.
static HttpRange	createByteRange(long firstBytePos, long lastBytePos) Create a HttpRange from the given fist to last position.
static HttpRange	createSuffixRange(long suffixLength) Create an HttpRange that ranges over the last given number of bytes.
abstract long	getRangeEnd(long length) Return the end of the range (inclusive) given the total length of a representation.
abstract long	getRangeStart(long length) Return the start of the range given the total length of a representation.
private static HttpRange	parseRange(java.lang.String range)
static java.util.List<HttpRange>	parseRanges(java.lang.String ranges) Parse the given, comma-separated string into a list of HttpRange objects.
ResourceRegion	toResourceRegion(Resource resource) Turn a Resource into a ResourceRegion using the range information contained in the current HttpRange.
static java.util.List<ResourceRegion>	toResourceRegions(java.util.List<HttpRange> ranges, Resource resource) Convert each HttpRange into a ResourceRegion, selecting the appropriate segment of the given Resource using the HTTP Range information.
static java.lang.String	toString(java.util.Collection<HttpRange> ranges) Return a string representation of the given list of HttpRange objects.

Methods inherited from class java.lang.Object

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

Field Detail

BYTE_RANGE_PREFIX

private static final java.lang.String BYTE_RANGE_PREFIX

See Also:

Constant Field Values

Constructor Detail

HttpRange

public HttpRange()

Method Detail

toResourceRegion

public ResourceRegion toResourceRegion(Resource resource)

Turn a Resource into a ResourceRegion using the range information contained in the current HttpRange.

Parameters:

resource - the Resource to select the region from

Returns:

the selected region of the given Resource

Since:

4.3

getRangeStart

public abstract long getRangeStart(long length)

Return the start of the range given the total length of a representation.

Parameters:

length - the length of the representation

Returns:

the start of this range for the representation

getRangeEnd

public abstract long getRangeEnd(long length)

Return the end of the range (inclusive) given the total length of a representation.

Parameters:

length - the length of the representation

Returns:

the end of the range for the representation

createByteRange

public static HttpRange createByteRange(long firstBytePos)

Create an HttpRange from the given position to the end.

Parameters:

firstBytePos - the first byte position

Returns:

a byte range that ranges from firstPos till the end

See Also:

Byte Ranges

createByteRange

public static HttpRange createByteRange(long firstBytePos,
                                        long lastBytePos)

Create a HttpRange from the given fist to last position.

Parameters:

firstBytePos - the first byte position

lastBytePos - the last byte position

Returns:

a byte range that ranges from firstPos till lastPos

See Also:

Byte Ranges

createSuffixRange

public static HttpRange createSuffixRange(long suffixLength)

Create an HttpRange that ranges over the last given number of bytes.

Parameters:

suffixLength - the number of bytes for the range

Returns:

a byte range that ranges over the last suffixLength number of bytes

See Also:

Byte Ranges

parseRanges

public static java.util.List<HttpRange> parseRanges(java.lang.String ranges)

Parse the given, comma-separated string into a list of HttpRange objects.

This method can be used to parse an Range header.

Parameters:

ranges - the string to parse

Returns:

the list of ranges

Throws:

java.lang.IllegalArgumentException - if the string cannot be parsed

parseRange

private static HttpRange parseRange(java.lang.String range)

toResourceRegions

public static java.util.List<ResourceRegion> toResourceRegions(java.util.List<HttpRange> ranges,
                                                               Resource resource)

Convert each HttpRange into a ResourceRegion, selecting the appropriate segment of the given Resource using the HTTP Range information.

Parameters:

ranges - the list of ranges

resource - the resource to select the regions from

Returns:

the list of regions for the given resource

toString

public static java.lang.String toString(java.util.Collection<HttpRange> ranges)

Return a string representation of the given list of HttpRange objects.

This method can be used to for an Range header.

Parameters:

ranges - the ranges to create a string of

Returns:

the string representation