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-Xms和-Xmx

-Xms和-Xmx是设置堆内存的最小值和最大值

JVM运行时数据区：

• 数据：方法区和堆Xmx

• 指令：程序计数器，虚拟机栈，本地方法栈

所以总结：那么Heap 越大可以供，程序申请的内存空间越少，就是说虚拟机栈越少（线程数量越少）

堆内存存储了对象，我们称为GC堆，我们增加-Xmx 只是增加了GC堆的大小正真执行程序的内存空间反而小了

• 对于高并发，创建对象不多的项目，可以降低Xmx的配置， 结合Xms 设定堆范围 -Xms256m -Xmx512

• 对于低并发，创建对象多的项目，（数据处理型的） 可以适当提高，Xmx

• 因为对象和数组是存放到Heap内的，栈帧中其实只存了对象地址，所以不存在爆的情况

注解校验

值校验

• @Null(message = "必须是null")

• @NotNull(message = "必须不是null") 适用于所有类型，且不能为null

• @NotBlank 不为空（不为null、去除首位空格后长度为0） ，并且类型为String

• @NotEmpty 用于字符串、集合、map、数组，且不能为null，并且长度或者大小大于1

• @AssertTrue 元素必须为true，并且类型为boolean

• @AssertFalse

范围校验

• @Min 被注解的元素其值必须大于等于最小值，并且类型为int，long，float，double。

• @Max 被注解的元素其值必须小于等于最小值，并且类型为int，long，float，double。

• @DecimalMin 证注解的元素值大于等于@DecimalMin指定的value值，并且类型为BigDecimal。

• @DecimalMax 验证注解的元素值小于等于@DecimalMax指定的value值 ，并且类型为BigDecimal

• @Range 注解的元素值在最小值和最大值之间，并且类型为BigDecimal，BigInteger，CharSequence，byte，short，int，long。

  @Range(max = 80, min = 18, message = "必须大于等于18或小于等于80")

• @Past

  @DateTimeFormat(pattern = "yyyy-MM-dd HH:mm:ss")
  @Past(message = "必须为过去的时间")
  private Date createDate;

• @Future

  @DateTimeFormat(pattern = "yyyy-MM-dd HH:mm:ss")
  @Future(message = "必须为未来的时间")
  private Date createDate;

长度校验

• @Size 被注解的元素的长度必须在指定范围内，并且类型为String，Array，List，Map

• @Length 验证注解的元素值长度在min和max区间内 ，并且类型为String。

格式校验

• @Digits 验证注解的元素值的整数位数和小数位数上限 ，并且类型为float，double，BigDecimal

  @Digits(integer=3, fraction = 2, message = "整数位上限为3位，小数位上限为2位")
  private BigDecimal height;

• @Pattern 被注解的元素必须符合指定的正则表达式，并且类型为String。

  @Pattern(regexp = "\\d{11}",message = "必须为数字，并且长度为11")
  private String mobile;

• @Email 验证注解的元素值是Email，也可以通过regexp和flag指定自定义的email格式，类型为String。

  @Email(message = "必须是邮箱")
  private String email;

布隆过滤器

布隆过滤器（Bloom Filter）是一种数据结构，用于快速检查一个元素是否属于某个集合中。它可以快速判断一个元素是否在一个大型集合中，且判断速度很快且不占用太多内存空间。

数据查询

布隆过滤器的数据查询过程主要分为以下几个步骤：

1.对要查询的元素进行k次哈希操作，得到k个哈希值。

2.查位数组中这k个位置的值是否都为1。

3.如果这k个位置的值都为1，则认为该元素可能在集合中；否则，认为该元素一定不在集合中。

优缺点

• 优点：时间和空间效率高，，，误判率低，，，支持高并发，，，易于实现

• 缺点：无法删除已添加的数据，，，误判率无法避免，，，无法精确判断元素是否存在

减少误判

• 使用多个布隆过滤器：将同一个元素添加到多个布隆过滤器中，查询时需要在所有布隆过滤器中查询。这种方法可以显著降低误判率，但是会增加存储空间和查询时间。

• 使用加密哈希函数：加密哈希函数可以使哈希值更难以预测，从而减少哈希冲突的概率。常见的加密哈希函数包括MD5、SHA-1等。

• 使用高质量的哈希函数：使用高质量的哈希函数可以减少哈希冲突的概率。常见的高质量哈希函数包括MurmurHash、CityHash等。

• 对于数据量较小的情况，可以使用简单的线性查找代替布隆过滤器，这样可以避免误判率过高的问题。

使用场景

缓存系统

缓存系统是一个常用的场景，布隆过滤器可以用来判断某个数据是否在缓存中。在实际操作中，可以先将缓存中的所有数据放入布隆过滤器中，然后查询时先查询布隆过滤器。如果查询结果表明该数据不存在，就说明该数据不在缓存中，需要从磁盘或者数据库中获取。如果查询结果表明该数据存在，就可以直接从缓存中获取，无需进行磁盘或数据库的访问。下面是一个使用布隆过滤器进行缓存判断的Java代码示例：

import com.google.common.hash.BloomFilter;
import com.google.common.hash.Funnels;
​
// 创建一个布隆过滤器
BloomFilter<String> bf = BloomFilter.create(Funnels.stringFunnel(), 1000000, 0.001);
​
// 将缓存中的所有数据加入布隆过滤器
for (String key : cache.keys()) {
    bf.put(key);
}
​
// 查询缓存中是否存在某个数据
if (bf.mightContain(key)) {
    value = cache.get(key);
} else {
    value = getFromDiskOrDatabase(key);
}

网络爬虫

网络爬虫是另一个常用的场景，布隆过滤器可以用来去重已经爬取过的URL。在实际操作中，可以将已经访问过的URL放入布隆过滤器中。每当需要访问一个新的URL时，先查询布隆过滤器。如果查询结果表明该URL已经存在，就说明该页面已经被爬取过，可以忽略。如果查询结果表明该URL不存在，就说明该页面尚未被爬取过，需要进行访问。

数据库系统

数据库系统是另一个常用的场景，布隆过滤器可以用来加速数据库查询。在实际操作中，可以将数据库中的所有关键字放入布隆过滤器中。每当需要查询某个关键字时，先查询布隆过滤器。如果查询结果表明该关键字不存在，就可以直接返回查询结果为空，无需进行数据库的访问。如果查询结果表明该关键字存在，就需要进行数据库的访问，查询具体的数据。

分布式系统

分布式系统是另一个常用的场景，布隆过滤器可以用来快速地判断某个元素是否在分布式系统中。在实际操作中，每个节点都可以维护一个布隆过滤器。当需要查询某个元素是否在分布式系统中时，可以将查询请求发送到所有节点，并在每个节点上查询布隆过滤器。如果查询结果表明该元素存在于任意一个节点中，就可以直接返回查询结果为真，无需进行进一步的操作。如果查询结果表明该元素不存在于任何一个节点中，就可以直接返回查询结果为假，无需进行进一步的操作。

Redisson组件

Redis实现布隆过滤器的底层就是通过bitmap这种数据结构，在Java中提供了一个客户端工具Redisson组件，它内置了布隆过滤器，可以让程序员非常简单直接地去设置布隆过滤器。

下载不同后缀名文件的content-type配置

BaseContentType = {
    ".load": "text/html",
    ".123": "application/vnd.lotus-1-2-3",
    ".3ds": "image/x-3ds",
    ".3g2": "video/3gpp",
    ".3ga": "video/3gpp",
    ".3gp": "video/3gpp",
    ".3gpp": "video/3gpp",
    ".602": "application/x-t602",
    ".669": "audio/x-mod",
    ".7z": "application/x-7z-compressed",
    ".a": "application/x-archive",
    ".aac": "audio/mp4",
    ".abw": "application/x-abiword",
    ".abw.crashed": "application/x-abiword",
    ".abw.gz": "application/x-abiword",
    ".ac3": "audio/ac3",
    ".ace": "application/x-ace",
    ".adb": "text/x-adasrc",
    ".ads": "text/x-adasrc",
    ".afm": "application/x-font-afm",
    ".ag": "image/x-applix-graphics",
    ".ai": "application/illustrator",
    ".aif": "audio/x-aiff",
    ".aifc": "audio/x-aiff",
    ".aiff": "audio/x-aiff",
    ".al": "application/x-perl",
    ".alz": "application/x-alz",
    ".amr": "audio/amr",
    ".ani": "application/x-navi-animation",
    ".anim[1-9j]": "video/x-anim",
    ".anx": "application/annodex",
    ".ape": "audio/x-ape",
    ".arj": "application/x-arj",
    ".arw": "image/x-sony-arw",
    ".as": "application/x-applix-spreadsheet",
    ".asc": "text/plain",
    ".asf": "video/x-ms-asf",
    ".asp": "application/x-asp",
    ".ass": "text/x-ssa",
    ".asx": "audio/x-ms-asx",
    ".atom": "application/atom+xml",
    ".au": "audio/basic",
    ".avi": "video/x-msvideo",
    ".aw": "application/x-applix-word",
    ".awb": "audio/amr-wb",
    ".awk": "application/x-awk",
    ".axa": "audio/annodex",
    ".axv": "video/annodex",
    ".bak": "application/x-trash",
    ".bcpio": "application/x-bcpio",
    ".bdf": "application/x-font-bdf",
    ".bib": "text/x-bibtex",
    ".bin": "application/octet-stream",
    ".blend": "application/x-blender",
    ".blender": "application/x-blender",
    ".bmp": "image/bmp",
    ".bz": "application/x-bzip",
    ".bz2": "application/x-bzip",
    ".c": "text/x-csrc",
    ".c++": "text/x-c++src",
    ".cab": "application/vnd.ms-cab-compressed",
    ".cb7": "application/x-cb7",
    ".cbr": "application/x-cbr",
    ".cbt": "application/x-cbt",
    ".cbz": "application/x-cbz",
    ".cc": "text/x-c++src",
    ".cdf": "application/x-netcdf",
    ".cdr": "application/vnd.corel-draw",
    ".cer": "application/x-x509-ca-cert",
    ".cert": "application/x-x509-ca-cert",
    ".cgm": "image/cgm",
    ".chm": "application/x-chm",
    ".chrt": "application/x-kchart",
    ".class": "application/x-java",
    ".cls": "text/x-tex",
    ".cmake": "text/x-cmake",
    ".cpio": "application/x-cpio",
    ".cpio.gz": "application/x-cpio-compressed",
    ".cpp": "text/x-c++src",
    ".cr2": "image/x-canon-cr2",
    ".crt": "application/x-x509-ca-cert",
    ".crw": "image/x-canon-crw",
    ".cs": "text/x-csharp",
    ".csh": "application/x-csh",
    ".css": "text/css",
    ".cssl": "text/css",
    ".csv": "text/csv",
    ".cue": "application/x-cue",
    ".cur": "image/x-win-bitmap",
    ".cxx": "text/x-c++src",
    ".d": "text/x-dsrc",
    ".dar": "application/x-dar",
    ".dbf": "application/x-dbf",
    ".dc": "application/x-dc-rom",
    ".dcl": "text/x-dcl",
    ".dcm": "application/dicom",
    ".dcr": "image/x-kodak-dcr",
    ".dds": "image/x-dds",
    ".deb": "application/x-deb",
    ".der": "application/x-x509-ca-cert",
    ".desktop": "application/x-desktop",
    ".dia": "application/x-dia-diagram",
    ".diff": "text/x-patch",
    ".divx": "video/x-msvideo",
    ".djv": "image/vnd.djvu",
    ".djvu": "image/vnd.djvu",
    ".dng": "image/x-adobe-dng",
    ".doc": "application/msword",
    ".docbook": "application/docbook+xml",
    ".docm": "application/vnd.openxmlformats-officedocument.wordprocessingml.document",
    ".docx": "application/vnd.openxmlformats-officedocument.wordprocessingml.document",
    ".dot": "text/vnd.graphviz",
    ".dsl": "text/x-dsl",
    ".dtd": "application/xml-dtd",
    ".dtx": "text/x-tex",
    ".dv": "video/dv",
    ".dvi": "application/x-dvi",
    ".dvi.bz2": "application/x-bzdvi",
    ".dvi.gz": "application/x-gzdvi",
    ".dwg": "image/vnd.dwg",
    ".dxf": "image/vnd.dxf",
    ".e": "text/x-eiffel",
    ".egon": "application/x-egon",
    ".eif": "text/x-eiffel",
    ".el": "text/x-emacs-lisp",
    ".emf": "image/x-emf",
    ".emp": "application/vnd.emusic-emusic_package",
    ".ent": "application/xml-external-parsed-entity",
    ".eps": "image/x-eps",
    ".eps.bz2": "image/x-bzeps",
    ".eps.gz": "image/x-gzeps",
    ".epsf": "image/x-eps",
    ".epsf.bz2": "image/x-bzeps",
    ".epsf.gz": "image/x-gzeps",
    ".epsi": "image/x-eps",
    ".epsi.bz2": "image/x-bzeps",
    ".epsi.gz": "image/x-gzeps",
    ".epub": "application/epub+zip",
    ".erl": "text/x-erlang",
    ".es": "application/ecmascript",
    ".etheme": "application/x-e-theme",
    ".etx": "text/x-setext",
    ".exe": "application/x-ms-dos-executable",
    ".exr": "image/x-exr",
    ".ez": "application/andrew-inset",
    ".f": "text/x-fortran",
    ".f90": "text/x-fortran",
    ".f95": "text/x-fortran",
    ".fb2": "application/x-fictionbook+xml",
    ".fig": "image/x-xfig",
    ".fits": "image/fits",
    ".fl": "application/x-fluid",
    ".flac": "audio/x-flac",
    ".flc": "video/x-flic",
    ".fli": "video/x-flic",
    ".flv": "video/x-flv",
    ".flw": "application/x-kivio",
    ".fo": "text/x-xslfo",
    ".for": "text/x-fortran",
    ".g3": "image/fax-g3",
    ".gb": "application/x-gameboy-rom",
    ".gba": "application/x-gba-rom",
    ".gcrd": "text/directory",
    ".ged": "application/x-gedcom",
    ".gedcom": "application/x-gedcom",
    ".gen": "application/x-genesis-rom",
    ".gf": "application/x-tex-gf",
    ".gg": "application/x-sms-rom",
    ".gif": "image/gif",
    ".glade": "application/x-glade",
    ".gmo": "application/x-gettext-translation",
    ".gnc": "application/x-gnucash",
    ".gnd": "application/gnunet-directory",
    ".gnucash": "application/x-gnucash",
    ".gnumeric": "application/x-gnumeric",
    ".gnuplot": "application/x-gnuplot",
    ".gp": "application/x-gnuplot",
    ".gpg": "application/pgp-encrypted",
    ".gplt": "application/x-gnuplot",
    ".gra": "application/x-graphite",
    ".gsf": "application/x-font-type1",
    ".gsm": "audio/x-gsm",
    ".gtar": "application/x-tar",
    ".gv": "text/vnd.graphviz",
    ".gvp": "text/x-google-video-pointer",
    ".gz": "application/x-gzip",
    ".h": "text/x-chdr",
    ".h++": "text/x-c++hdr",
    ".hdf": "application/x-hdf",
    ".hh": "text/x-c++hdr",
    ".hp": "text/x-c++hdr",
    ".hpgl": "application/vnd.hp-hpgl",
    ".hpp": "text/x-c++hdr",
    ".hs": "text/x-haskell",
    ".htm": "text/html",
    ".html": "text/html",
    ".hwp": "application/x-hwp",
    ".hwt": "application/x-hwt",
    ".hxx": "text/x-c++hdr",
    ".ica": "application/x-ica",
    ".icb": "image/x-tga",
    ".icns": "image/x-icns",
    ".ico": "image/vnd.microsoft.icon",
    ".ics": "text/calendar",
    ".idl": "text/x-idl",
    ".ief": "image/ief",
    ".iff": "image/x-iff",
    ".ilbm": "image/x-ilbm",
    ".ime": "text/x-imelody",
    ".imy": "text/x-imelody",
    ".ins": "text/x-tex",
    ".iptables": "text/x-iptables",
    ".iso": "application/x-cd-image",
    ".iso9660": "application/x-cd-image",
    ".it": "audio/x-it",
    ".j2k": "image/jp2",
    ".jad": "text/vnd.sun.j2me.app-descriptor",
    ".jar": "application/x-java-archive",
    ".java": "text/x-java",
    ".jng": "image/x-jng",
    ".jnlp": "application/x-java-jnlp-file",
    ".jp2": "image/jp2",
    ".jpc": "image/jp2",
    ".jpe": "image/jpeg",
    ".jpeg": "image/jpeg",
    ".jpf": "image/jp2",
    ".jpg": "image/jpeg",
    ".jpr": "application/x-jbuilder-project",
    ".jpx": "image/jp2",
    ".js": "application/javascript",
    ".json": "application/json",
    ".jsonp": "application/jsonp",
    ".k25": "image/x-kodak-k25",
    ".kar": "audio/midi",
    ".karbon": "application/x-karbon",
    ".kdc": "image/x-kodak-kdc",
    ".kdelnk": "application/x-desktop",
    ".kexi": "application/x-kexiproject-sqlite3",
    ".kexic": "application/x-kexi-connectiondata",
    ".kexis": "application/x-kexiproject-shortcut",
    ".kfo": "application/x-kformula",
    ".kil": "application/x-killustrator",
    ".kino": "application/smil",
    ".kml": "application/vnd.google-earth.kml+xml",
    ".kmz": "application/vnd.google-earth.kmz",
    ".kon": "application/x-kontour",
    ".kpm": "application/x-kpovmodeler",
    ".kpr": "application/x-kpresenter",
    ".kpt": "application/x-kpresenter",
    ".kra": "application/x-krita",
    ".ksp": "application/x-kspread",
    ".kud": "application/x-kugar",
    ".kwd": "application/x-kword",
    ".kwt": "application/x-kword",
    ".la": "application/x-shared-library-la",
    ".latex": "text/x-tex",
    ".ldif": "text/x-ldif",
    ".lha": "application/x-lha",
    ".lhs": "text/x-literate-haskell",
    ".lhz": "application/x-lhz",
    ".log": "text/x-log",
    ".ltx": "text/x-tex",
    ".lua": "text/x-lua",
    ".lwo": "image/x-lwo",
    ".lwob": "image/x-lwo",
    ".lws": "image/x-lws",
    ".ly": "text/x-lilypond",
    ".lyx": "application/x-lyx",
    ".lz": "application/x-lzip",
    ".lzh": "application/x-lha",
    ".lzma": "application/x-lzma",
    ".lzo": "application/x-lzop",
    ".m": "text/x-matlab",
    ".m15": "audio/x-mod",
    ".m2t": "video/mpeg",
    ".m3u": "audio/x-mpegurl",
    ".m3u8": "audio/x-mpegurl",
    ".m4": "application/x-m4",
    ".m4a": "audio/mp4",
    ".m4b": "audio/x-m4b",
    ".m4v": "video/mp4",
    ".mab": "application/x-markaby",
    ".man": "application/x-troff-man",
    ".mbox": "application/mbox",
    ".md": "application/x-genesis-rom",
    ".mdb": "application/vnd.ms-access",
    ".mdi": "image/vnd.ms-modi",
    ".me": "text/x-troff-me",
    ".med": "audio/x-mod",
    ".metalink": "application/metalink+xml",
    ".mgp": "application/x-magicpoint",
    ".mid": "audio/midi",
    ".midi": "audio/midi",
    ".mif": "application/x-mif",
    ".minipsf": "audio/x-minipsf",
    ".mka": "audio/x-matroska",
    ".mkv": "video/x-matroska",
    ".ml": "text/x-ocaml",
    ".mli": "text/x-ocaml",
    ".mm": "text/x-troff-mm",
    ".mmf": "application/x-smaf",
    ".mml": "text/mathml",
    ".mng": "video/x-mng",
    ".mo": "application/x-gettext-translation",
    ".mo3": "audio/x-mo3",
    ".moc": "text/x-moc",
    ".mod": "audio/x-mod",
    ".mof": "text/x-mof",
    ".moov": "video/quicktime",
    ".mov": "video/quicktime",
    ".movie": "video/x-sgi-movie",
    ".mp+": "audio/x-musepack",
    ".mp2": "video/mpeg",
    ".mp3": "audio/mpeg",
    ".mp4": "video/mp4",
    ".mpc": "audio/x-musepack",
    ".mpe": "video/mpeg",
    ".mpeg": "video/mpeg",
    ".mpg": "video/mpeg",
    ".mpga": "audio/mpeg",
    ".mpp": "audio/x-musepack",
    ".mrl": "text/x-mrml",
    ".mrml": "text/x-mrml",
    ".mrw": "image/x-minolta-mrw",
    ".ms": "text/x-troff-ms",
    ".msi": "application/x-msi",
    ".msod": "image/x-msod",
    ".msx": "application/x-msx-rom",
    ".mtm": "audio/x-mod",
    ".mup": "text/x-mup",
    ".mxf": "application/mxf",
    ".n64": "application/x-n64-rom",
    ".nb": "application/mathematica",
    ".nc": "application/x-netcdf",
    ".nds": "application/x-nintendo-ds-rom",
    ".nef": "image/x-nikon-nef",
    ".nes": "application/x-nes-rom",
    ".nfo": "text/x-nfo",
    ".not": "text/x-mup",
    ".nsc": "application/x-netshow-channel",
    ".nsv": "video/x-nsv",
    ".o": "application/x-object",
    ".obj": "application/x-tgif",
    ".ocl": "text/x-ocl",
    ".oda": "application/oda",
    ".odb": "application/vnd.oasis.opendocument.database",
    ".odc": "application/vnd.oasis.opendocument.chart",
    ".odf": "application/vnd.oasis.opendocument.formula",
    ".odg": "application/vnd.oasis.opendocument.graphics",
    ".odi": "application/vnd.oasis.opendocument.image",
    ".odm": "application/vnd.oasis.opendocument.text-master",
    ".odp": "application/vnd.oasis.opendocument.presentation",
    ".ods": "application/vnd.oasis.opendocument.spreadsheet",
    ".odt": "application/vnd.oasis.opendocument.text",
    ".oga": "audio/ogg",
    ".ogg": "video/x-theora+ogg",
    ".ogm": "video/x-ogm+ogg",
    ".ogv": "video/ogg",
    ".ogx": "application/ogg",
    ".old": "application/x-trash",
    ".oleo": "application/x-oleo",
    ".opml": "text/x-opml+xml",
    ".ora": "image/openraster",
    ".orf": "image/x-olympus-orf",
    ".otc": "application/vnd.oasis.opendocument.chart-template",
    ".otf": "application/x-font-otf",
    ".otg": "application/vnd.oasis.opendocument.graphics-template",
    ".oth": "application/vnd.oasis.opendocument.text-web",
    ".otp": "application/vnd.oasis.opendocument.presentation-template",
    ".ots": "application/vnd.oasis.opendocument.spreadsheet-template",
    ".ott": "application/vnd.oasis.opendocument.text-template",
    ".owl": "application/rdf+xml",
    ".oxt": "application/vnd.openofficeorg.extension",
    ".p": "text/x-pascal",
    ".p10": "application/pkcs10",
    ".p12": "application/x-pkcs12",
    ".p7b": "application/x-pkcs7-certificates",
    ".p7s": "application/pkcs7-signature",
    ".pack": "application/x-java-pack200",
    ".pak": "application/x-pak",
    ".par2": "application/x-par2",
    ".pas": "text/x-pascal",
    ".patch": "text/x-patch",
    ".pbm": "image/x-portable-bitmap",
    ".pcd": "image/x-photo-cd",
    ".pcf": "application/x-cisco-vpn-settings",
    ".pcf.gz": "application/x-font-pcf",
    ".pcf.z": "application/x-font-pcf",
    ".pcl": "application/vnd.hp-pcl",
    ".pcx": "image/x-pcx",
    ".pdb": "chemical/x-pdb",
    ".pdc": "application/x-aportisdoc",
    ".pdf": "application/pdf",
    ".pdf.bz2": "application/x-bzpdf",
    ".pdf.gz": "application/x-gzpdf",
    ".pef": "image/x-pentax-pef",
    ".pem": "application/x-x509-ca-cert",
    ".perl": "application/x-perl",
    ".pfa": "application/x-font-type1",
    ".pfb": "application/x-font-type1",
    ".pfx": "application/x-pkcs12",
    ".pgm": "image/x-portable-graymap",
    ".pgn": "application/x-chess-pgn",
    ".pgp": "application/pgp-encrypted",
    ".php": "application/x-php",
    ".php3": "application/x-php",
    ".php4": "application/x-php",
    ".pict": "image/x-pict",
    ".pict1": "image/x-pict",
    ".pict2": "image/x-pict",
    ".pickle": "application/python-pickle",
    ".pk": "application/x-tex-pk",
    ".pkipath": "application/pkix-pkipath",
    ".pkr": "application/pgp-keys",
    ".pl": "application/x-perl",
    ".pla": "audio/x-iriver-pla",
    ".pln": "application/x-planperfect",
    ".pls": "audio/x-scpls",
    ".pm": "application/x-perl",
    ".png": "image/png",
    ".pnm": "image/x-portable-anymap",
    ".pntg": "image/x-macpaint",
    ".po": "text/x-gettext-translation",
    ".por": "application/x-spss-por",
    ".pot": "text/x-gettext-translation-template",
    ".ppm": "image/x-portable-pixmap",
    ".pps": "application/vnd.ms-powerpoint",
    ".ppt": "application/vnd.ms-powerpoint",
    ".pptm": "application/vnd.openxmlformats-officedocument.presentationml.presentation",
    ".pptx": "application/vnd.openxmlformats-officedocument.presentationml.presentation",
    ".ppz": "application/vnd.ms-powerpoint",
    ".prc": "application/x-palm-database",
    ".ps": "application/postscript",
    ".ps.bz2": "application/x-bzpostscript",
    ".ps.gz": "application/x-gzpostscript",
    ".psd": "image/vnd.adobe.photoshop",
    ".psf": "audio/x-psf",
    ".psf.gz": "application/x-gz-font-linux-psf",
    ".psflib": "audio/x-psflib",
    ".psid": "audio/prs.sid",
    ".psw": "application/x-pocket-word",
    ".pw": "application/x-pw",
    ".py": "text/x-python",
    ".pyc": "application/x-python-bytecode",
    ".pyo": "application/x-python-bytecode",
    ".qif": "image/x-quicktime",
    ".qt": "video/quicktime",
    ".qtif": "image/x-quicktime",
    ".qtl": "application/x-quicktime-media-link",
    ".qtvr": "video/quicktime",
    ".ra": "audio/vnd.rn-realaudio",
    ".raf": "image/x-fuji-raf",
    ".ram": "application/ram",
    ".rar": "application/x-rar",
    ".ras": "image/x-cmu-raster",
    ".raw": "image/x-panasonic-raw",
    ".rax": "audio/vnd.rn-realaudio",
    ".rb": "application/x-ruby",
    ".rdf": "application/rdf+xml",
    ".rdfs": "application/rdf+xml",
    ".reg": "text/x-ms-regedit",
    ".rej": "application/x-reject",
    ".rgb": "image/x-rgb",
    ".rle": "image/rle",
    ".rm": "application/vnd.rn-realmedia",
    ".rmj": "application/vnd.rn-realmedia",
    ".rmm": "application/vnd.rn-realmedia",
    ".rms": "application/vnd.rn-realmedia",
    ".rmvb": "application/vnd.rn-realmedia",
    ".rmx": "application/vnd.rn-realmedia",
    ".roff": "text/troff",
    ".rp": "image/vnd.rn-realpix",
    ".rpm": "application/x-rpm",
    ".rss": "application/rss+xml",
    ".rt": "text/vnd.rn-realtext",
    ".rtf": "application/rtf",
    ".rtx": "text/richtext",
    ".rv": "video/vnd.rn-realvideo",
    ".rvx": "video/vnd.rn-realvideo",
    ".s3m": "audio/x-s3m",
    ".sam": "application/x-amipro",
    ".sami": "application/x-sami",
    ".sav": "application/x-spss-sav",
    ".scm": "text/x-scheme",
    ".sda": "application/vnd.stardivision.draw",
    ".sdc": "application/vnd.stardivision.calc",
    ".sdd": "application/vnd.stardivision.impress",
    ".sdp": "application/sdp",
    ".sds": "application/vnd.stardivision.chart",
    ".sdw": "application/vnd.stardivision.writer",
    ".sgf": "application/x-go-sgf",
    ".sgi": "image/x-sgi",
    ".sgl": "application/vnd.stardivision.writer",
    ".sgm": "text/sgml",
    ".sgml": "text/sgml",
    ".sh": "application/x-shellscript",
    ".shar": "application/x-shar",
    ".shn": "application/x-shorten",
    ".siag": "application/x-siag",
    ".sid": "audio/prs.sid",
    ".sik": "application/x-trash",
    ".sis": "application/vnd.symbian.install",
    ".sisx": "x-epoc/x-sisx-app",
    ".sit": "application/x-stuffit",
    ".siv": "application/sieve",
    ".sk": "image/x-skencil",
    ".sk1": "image/x-skencil",
    ".skr": "application/pgp-keys",
    ".slk": "text/spreadsheet",
    ".smaf": "application/x-smaf",
    ".smc": "application/x-snes-rom",
    ".smd": "application/vnd.stardivision.mail",
    ".smf": "application/vnd.stardivision.math",
    ".smi": "application/x-sami",
    ".smil": "application/smil",
    ".sml": "application/smil",
    ".sms": "application/x-sms-rom",
    ".snd": "audio/basic",
    ".so": "application/x-sharedlib",
    ".spc": "application/x-pkcs7-certificates",
    ".spd": "application/x-font-speedo",
    ".spec": "text/x-rpm-spec",
    ".spl": "application/x-shockwave-flash",
    ".spx": "audio/x-speex",
    ".sql": "text/x-sql",
    ".sr2": "image/x-sony-sr2",
    ".src": "application/x-wais-source",
    ".srf": "image/x-sony-srf",
    ".srt": "application/x-subrip",
    ".ssa": "text/x-ssa",
    ".stc": "application/vnd.sun.xml.calc.template",
    ".std": "application/vnd.sun.xml.draw.template",
    ".sti": "application/vnd.sun.xml.impress.template",
    ".stm": "audio/x-stm",
    ".stw": "application/vnd.sun.xml.writer.template",
    ".sty": "text/x-tex",
    ".sub": "text/x-subviewer",
    ".sun": "image/x-sun-raster",
    ".sv4cpio": "application/x-sv4cpio",
    ".sv4crc": "application/x-sv4crc",
    ".svg": "image/svg+xml",
    ".svgz": "image/svg+xml-compressed",
    ".swf": "application/x-shockwave-flash",
    ".sxc": "application/vnd.sun.xml.calc",
    ".sxd": "application/vnd.sun.xml.draw",
    ".sxg": "application/vnd.sun.xml.writer.global",
    ".sxi": "application/vnd.sun.xml.impress",
    ".sxm": "application/vnd.sun.xml.math",
    ".sxw": "application/vnd.sun.xml.writer",
    ".sylk": "text/spreadsheet",
    ".t": "text/troff",
    ".t2t": "text/x-txt2tags",
    ".tar": "application/x-tar",
    ".tar.bz": "application/x-bzip-compressed-tar",
    ".tar.bz2": "application/x-bzip-compressed-tar",
    ".tar.gz": "application/x-compressed-tar",
    ".tar.lzma": "application/x-lzma-compressed-tar",
    ".tar.lzo": "application/x-tzo",
    ".tar.xz": "application/x-xz-compressed-tar",
    ".tar.z": "application/x-tarz",
    ".tbz": "application/x-bzip-compressed-tar",
    ".tbz2": "application/x-bzip-compressed-tar",
    ".tcl": "text/x-tcl",
    ".tex": "text/x-tex",
    ".texi": "text/x-texinfo",
    ".texinfo": "text/x-texinfo",
    ".tga": "image/x-tga",
    ".tgz": "application/x-compressed-tar",
    ".theme": "application/x-theme",
    ".themepack": "application/x-windows-themepack",
    ".tif": "image/tiff",
    ".tiff": "image/tiff",
    ".tk": "text/x-tcl",
    ".tlz": "application/x-lzma-compressed-tar",
    ".tnef": "application/vnd.ms-tnef",
    ".tnf": "application/vnd.ms-tnef",
    ".toc": "application/x-cdrdao-toc",
    ".torrent": "application/x-bittorrent",
    ".tpic": "image/x-tga",
    ".tr": "text/troff",
    ".ts": "application/x-linguist",
    ".tsv": "text/tab-separated-values",
    ".tta": "audio/x-tta",
    ".ttc": "application/x-font-ttf",
    ".ttf": "application/x-font-ttf",
    ".ttx": "application/x-font-ttx",
    ".txt": "text/plain",
    ".txz": "application/x-xz-compressed-tar",
    ".tzo": "application/x-tzo",
    ".ufraw": "application/x-ufraw",
    ".ui": "application/x-designer",
    ".uil": "text/x-uil",
    ".ult": "audio/x-mod",
    ".uni": "audio/x-mod",
    ".uri": "text/x-uri",
    ".url": "text/x-uri",
    ".ustar": "application/x-ustar",
    ".vala": "text/x-vala",
    ".vapi": "text/x-vala",
    ".vcf": "text/directory",
    ".vcs": "text/calendar",
    ".vct": "text/directory",
    ".vda": "image/x-tga",
    ".vhd": "text/x-vhdl",
    ".vhdl": "text/x-vhdl",
    ".viv": "video/vivo",
    ".vivo": "video/vivo",
    ".vlc": "audio/x-mpegurl",
    ".vob": "video/mpeg",
    ".voc": "audio/x-voc",
    ".vor": "application/vnd.stardivision.writer",
    ".vst": "image/x-tga",
    ".wav": "audio/x-wav",
    ".wax": "audio/x-ms-asx",
    ".wb1": "application/x-quattropro",
    ".wb2": "application/x-quattropro",
    ".wb3": "application/x-quattropro",
    ".wbmp": "image/vnd.wap.wbmp",
    ".wcm": "application/vnd.ms-works",
    ".wdb": "application/vnd.ms-works",
    ".webm": "video/webm",
    ".wk1": "application/vnd.lotus-1-2-3",
    ".wk3": "application/vnd.lotus-1-2-3",
    ".wk4": "application/vnd.lotus-1-2-3",
    ".wks": "application/vnd.ms-works",
    ".wma": "audio/x-ms-wma",
    ".wmf": "image/x-wmf",
    ".wml": "text/vnd.wap.wml",
    ".wmls": "text/vnd.wap.wmlscript",
    ".wmv": "video/x-ms-wmv",
    ".wmx": "audio/x-ms-asx",
    ".wp": "application/vnd.wordperfect",
    ".wp4": "application/vnd.wordperfect",
    ".wp5": "application/vnd.wordperfect",
    ".wp6": "application/vnd.wordperfect",
    ".wpd": "application/vnd.wordperfect",
    ".wpg": "application/x-wpg",
    ".wpl": "application/vnd.ms-wpl",
    ".wpp": "application/vnd.wordperfect",
    ".wps": "application/vnd.ms-works",
    ".wri": "application/x-mswrite",
    ".wrl": "model/vrml",
    ".wv": "audio/x-wavpack",
    ".wvc": "audio/x-wavpack-correction",
    ".wvp": "audio/x-wavpack",
    ".wvx": "audio/x-ms-asx",
    ".x3f": "image/x-sigma-x3f",
    ".xac": "application/x-gnucash",
    ".xbel": "application/x-xbel",
    ".xbl": "application/xml",
    ".xbm": "image/x-xbitmap",
    ".xcf": "image/x-xcf",
    ".xcf.bz2": "image/x-compressed-xcf",
    ".xcf.gz": "image/x-compressed-xcf",
    ".xhtml": "application/xhtml+xml",
    ".xi": "audio/x-xi",
    ".xla": "application/vnd.ms-excel",
    ".xlc": "application/vnd.ms-excel",
    ".xld": "application/vnd.ms-excel",
    ".xlf": "application/x-xliff",
    ".xliff": "application/x-xliff",
    ".xll": "application/vnd.ms-excel",
    ".xlm": "application/vnd.ms-excel",
    ".xls": "application/vnd.ms-excel",
    ".xlsm": "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet",
    ".xlsx": "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet",
    ".xlt": "application/vnd.ms-excel",
    ".xlw": "application/vnd.ms-excel",
    ".xm": "audio/x-xm",
    ".xmf": "audio/x-xmf",
    ".xmi": "text/x-xmi",
    ".xml": "application/xml",
    ".xpm": "image/x-xpixmap",
    ".xps": "application/vnd.ms-xpsdocument",
    ".xsl": "application/xml",
    ".xslfo": "text/x-xslfo",
    ".xslt": "application/xml",
    ".xspf": "application/xspf+xml",
    ".xul": "application/vnd.mozilla.xul+xml",
    ".xwd": "image/x-xwindowdump",
    ".xyz": "chemical/x-pdb",
    ".xz": "application/x-xz",
    ".w2p": "application/w2p",
    ".z": "application/x-compress",
    ".zabw": "application/x-abiword",
    ".zip": "application/zip"
}