Mercurial > hg > nginx-quic
view docs/xslt/changes.xslt @ 6271:22ee99422329
HTTP/2: reject self-dependent streams.
Per RFC7540, a stream cannot depend on itself.
Previously, this requirement was enforced on PRIORITY frames, but not on
HEADERS frames and due to the implementation details nginx worker would
crash (stack overflow) while opening self-dependent stream.
Found with afl-fuzz.
Signed-off-by: Piotr Sikora <piotrsikora@google.com>
author | Piotr Sikora <piotrsikora@google.com> |
---|---|
date | Thu, 01 Oct 2015 20:25:55 -0700 |
parents | db6d07dbef3c |
children | b7e02f47a339 |
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<?xml version="1.0" encoding="utf-8"?> <xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0"> <xsl:output method="text"/> <xsl:param select="'en'" name="lang"/> <xsl:param select="'../xml/change_log_conf.xml'" name="configuration"/> <xsl:variable select="document($configuration)/configuration" name="conf"/> <xsl:variable select="$conf/start" name="start"/> <xsl:variable select="$conf/indent" name="indent"/> <xsl:variable select="$conf/length" name="max"/> <xsl:variable name="br"><br></xsl:variable> <xsl:template match="/"> <xsl:apply-templates select="change_log"/> </xsl:template> <xsl:template match="change_log"> <xsl:apply-templates select="changes"/> </xsl:template> <xsl:template match="changes"> <xsl:text> </xsl:text> <xsl:value-of select="substring(concat($conf/changes[@lang=$lang]/title, //change_log/@title, ' ', @ver, ' '), 1, $conf/changes[@lang=$lang]/length)"/> <xsl:if test="$lang='ru'"> <xsl:value-of select="@date"/> </xsl:if> <xsl:if test="$lang='en'"> <xsl:value-of select="substring(@date, 1, 2)"/> <xsl:value-of select="$conf/changes[@lang=$lang]/month[number(substring(current()/@date, 4, 2))]"/> <xsl:value-of select="substring(@date, 7, 4)"/> </xsl:if> <xsl:text> </xsl:text> <xsl:apply-templates select="change"/> <xsl:text> </xsl:text> </xsl:template> <xsl:template match="change"> <xsl:variable select="$conf/changes[@lang=$lang]/*[local-name(.)=current()/@type]" name="prefix"/> <xsl:variable name="postfix"> <xsl:if test="$prefix"> <xsl:text>: </xsl:text> </xsl:if> </xsl:variable> <xsl:apply-templates select="para[@lang=$lang]"><xsl:with-param select="concat($start, $prefix, $postfix)" name="prefix"/></xsl:apply-templates> </xsl:template> <xsl:template name="para" match="para"><xsl:param name="prefix"/> <xsl:variable name="text"> <xsl:apply-templates/> </xsl:variable> <xsl:text> </xsl:text> <xsl:call-template name="wrap"><xsl:with-param select="normalize-space($text)" name="text"/><xsl:with-param name="prefix"> <xsl:choose><xsl:when test="position() = 1"> <xsl:value-of select="$prefix"/> </xsl:when><xsl:otherwise> <xsl:value-of select="$indent"/> </xsl:otherwise></xsl:choose> </xsl:with-param></xsl:call-template></xsl:template> <xsl:template name="wrap"><xsl:param name="text"/><xsl:param name="prefix"/> <xsl:if test="$text"> <xsl:variable name="offset"> <xsl:choose> <xsl:when test="starts-with($text, concat($br, ' '))"> <xsl:value-of select="string-length($br) + 2"/> </xsl:when> <xsl:when test="starts-with($text, $br)"> <xsl:value-of select="string-length($br) + 1"/> </xsl:when> <xsl:otherwise> 1 </xsl:otherwise> </xsl:choose> </xsl:variable> <xsl:variable name="length"> <xsl:call-template name="length"><xsl:with-param select="substring($text, $offset)" name="text"/><xsl:with-param select="string-length($prefix)" name="prefix"/><xsl:with-param select="$max" name="length"/></xsl:call-template></xsl:variable> <xsl:value-of select="$prefix"/> <xsl:value-of select="normalize-space(translate(substring($text, $offset, $length), ' ', ' '))"/> <xsl:text> </xsl:text> <xsl:call-template name="wrap"><xsl:with-param select="substring($text, $length + $offset)" name="text"/><xsl:with-param select="$indent" name="prefix"/></xsl:call-template></xsl:if> </xsl:template> <xsl:template name="length"><xsl:param name="text"/><xsl:param name="prefix"/><xsl:param name="length"/> <xsl:variable select="substring-before(substring($text, 1, $length - $prefix + string-length($br)), $br)" name="break"/> <xsl:choose> <xsl:when test="$break"> <xsl:value-of select="string-length($break)"/> </xsl:when> <xsl:when test="$length = 0"> <xsl:value-of select="$max - $prefix"/> </xsl:when> <xsl:when test="string-length($text) + $prefix <= $length"> <xsl:value-of select="$length - $prefix"/> </xsl:when> <xsl:when test="substring($text, $length - $prefix + 1, 1) = ' '"> <xsl:value-of select="$length - $prefix + 1"/> </xsl:when> <xsl:otherwise> <xsl:call-template name="length"><xsl:with-param select="$text" name="text"/><xsl:with-param select="$prefix" name="prefix"/><xsl:with-param select="$length - 1" name="length"/></xsl:call-template></xsl:otherwise> </xsl:choose> </xsl:template> <xsl:template match="at">@</xsl:template> <xsl:template match="br"> <xsl:value-of select="$br"/> </xsl:template> <xsl:template match="nobr"> <xsl:value-of select="translate(., ' ', ' ')"/> </xsl:template> </xsl:stylesheet>