package oss import ( "mime" "path" "strings" ) var extToMimeType = map[string]string{ ".xlsx": "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet", ".xltx": "application/vnd.openxmlformats-officedocument.spreadsheetml.template", ".potx": "application/vnd.openxmlformats-officedocument.presentationml.template", ".ppsx": "application/vnd.openxmlformats-officedocument.presentationml.slideshow", ".pptx": "application/vnd.openxmlformats-officedocument.presentationml.presentation", ".sldx": "application/vnd.openxmlformats-officedocument.presentationml.slide", ".docx": "application/vnd.openxmlformats-officedocument.wordprocessingml.document", ".dotx": "application/vnd.openxmlformats-officedocument.wordprocessingml.template", ".xlam": "application/vnd.ms-excel.addin.macroEnabled.12", ".xlsb": "application/vnd.ms-excel.sheet.binary.macroEnabled.12", ".apk": "application/vnd.android.package-archive", ".hqx": "application/mac-binhex40", ".cpt": "application/mac-compactpro", ".doc": "application/msword", ".ogg": "application/ogg", ".pdf": "application/pdf", ".rtf": "text/rtf", ".mif": "application/vnd.mif", ".xls": "application/vnd.ms-excel", ".ppt": "application/vnd.ms-powerpoint", ".odc": "application/vnd.oasis.opendocument.chart", ".odb": "application/vnd.oasis.opendocument.database", ".odf": "application/vnd.oasis.opendocument.formula", ".odg": "application/vnd.oasis.opendocument.graphics", ".otg": "application/vnd.oasis.opendocument.graphics-template", ".odi": "application/vnd.oasis.opendocument.image", ".odp": "application/vnd.oasis.opendocument.presentation", ".otp": "application/vnd.oasis.opendocument.presentation-template", ".ods": "application/vnd.oasis.opendocument.spreadsheet", ".ots": "application/vnd.oasis.opendocument.spreadsheet-template", ".odt": "application/vnd.oasis.opendocument.text", ".odm": "application/vnd.oasis.opendocument.text-master", ".ott": "application/vnd.oasis.opendocument.text-template", ".oth": "application/vnd.oasis.opendocument.text-web", ".sxw": "application/vnd.sun.xml.writer", ".stw": "application/vnd.sun.xml.writer.template", ".sxc": "application/vnd.sun.xml.calc", ".stc": "application/vnd.sun.xml.calc.template", ".sxd": "application/vnd.sun.xml.draw", ".std": "application/vnd.sun.xml.draw.template", ".sxi": "application/vnd.sun.xml.impress", ".sti": "application/vnd.sun.xml.impress.template", ".sxg": "application/vnd.sun.xml.writer.global", ".sxm": "application/vnd.sun.xml.math", ".sis": "application/vnd.symbian.install", ".wbxml": "application/vnd.wap.wbxml", ".wmlc": "application/vnd.wap.wmlc", ".wmlsc": "application/vnd.wap.wmlscriptc", ".bcpio": "application/x-bcpio", ".torrent": "application/x-bittorrent", ".bz2": "application/x-bzip2", ".vcd": "application/x-cdlink", ".pgn": "application/x-chess-pgn", ".cpio": "application/x-cpio", ".csh": "application/x-csh", ".dvi": "application/x-dvi", ".spl": "application/x-futuresplash", ".gtar": "application/x-gtar", ".hdf": "application/x-hdf", ".jar": "application/x-java-archive", ".jnlp": "application/x-java-jnlp-file", ".js": "application/x-javascript", ".ksp": "application/x-kspread", ".chrt": "application/x-kchart", ".kil": "application/x-killustrator", ".latex": "application/x-latex", ".rpm": "application/x-rpm", ".sh": "application/x-sh", ".shar": "application/x-shar", ".swf": "application/x-shockwave-flash", ".sit": "application/x-stuffit", ".sv4cpio": "application/x-sv4cpio", ".sv4crc": "application/x-sv4crc", ".tar": "application/x-tar", ".tcl": "application/x-tcl", ".tex": "application/x-tex", ".man": "application/x-troff-man", ".me": "application/x-troff-me", ".ms": "application/x-troff-ms", ".ustar": "application/x-ustar", ".src": "application/x-wais-source", ".zip": "application/zip", ".m3u": "audio/x-mpegurl", ".ra": "audio/x-pn-realaudio", ".wav": "audio/x-wav", ".wma": "audio/x-ms-wma", ".wax": "audio/x-ms-wax", ".pdb": "chemical/x-pdb", ".xyz": "chemical/x-xyz", ".bmp": "image/bmp", ".gif": "image/gif", ".ief": "image/ief", ".png": "image/png", ".wbmp": "image/vnd.wap.wbmp", ".ras": "image/x-cmu-raster", ".pnm": "image/x-portable-anymap", ".pbm": "image/x-portable-bitmap", ".pgm": "image/x-portable-graymap", ".ppm": "image/x-portable-pixmap", ".rgb": "image/x-rgb", ".xbm": "image/x-xbitmap", ".xpm": "image/x-xpixmap", ".xwd": "image/x-xwindowdump", ".css": "text/css", ".rtx": "text/richtext", ".tsv": "text/tab-separated-values", ".jad": "text/vnd.sun.j2me.app-descriptor", ".wml": "text/vnd.wap.wml", ".wmls": "text/vnd.wap.wmlscript", ".etx": "text/x-setext", ".mxu": "video/vnd.mpegurl", ".flv": "video/x-flv", ".wm": "video/x-ms-wm", ".wmv": "video/x-ms-wmv", ".wmx": "video/x-ms-wmx", ".wvx": "video/x-ms-wvx", ".avi": "video/x-msvideo", ".movie": "video/x-sgi-movie", ".ice": "x-conference/x-cooltalk", ".3gp": "video/3gpp", ".ai": "application/postscript", ".aif": "audio/x-aiff", ".aifc": "audio/x-aiff", ".aiff": "audio/x-aiff", ".asc": "text/plain", ".atom": "application/atom+xml", ".au": "audio/basic", ".bin": "application/octet-stream", ".cdf": "application/x-netcdf", ".cgm": "image/cgm", ".class": "application/octet-stream", ".dcr": "application/x-director", ".dif": "video/x-dv", ".dir": "application/x-director", ".djv": "image/vnd.djvu", ".djvu": "image/vnd.djvu", ".dll": "application/octet-stream", ".dmg": "application/octet-stream", ".dms": "application/octet-stream", ".dtd": "application/xml-dtd", ".dv": "video/x-dv", ".dxr": "application/x-director", ".eps": "application/postscript", ".exe": "application/octet-stream", ".ez": "application/andrew-inset", ".gram": "application/srgs", ".grxml": "application/srgs+xml", ".gz": "application/x-gzip", ".htm": "text/html", ".html": "text/html", ".ico": "image/x-icon", ".ics": "text/calendar", ".ifb": "text/calendar", ".iges": "model/iges", ".igs": "model/iges", ".jp2": "image/jp2", ".jpe": "image/jpeg", ".jpeg": "image/jpeg", ".jpg": "image/jpeg", ".kar": "audio/midi", ".lha": "application/octet-stream", ".lzh": "application/octet-stream", ".m4a": "audio/mp4a-latm", ".m4p": "audio/mp4a-latm", ".m4u": "video/vnd.mpegurl", ".m4v": "video/x-m4v", ".mac": "image/x-macpaint", ".mathml": "application/mathml+xml", ".mesh": "model/mesh", ".mid": "audio/midi", ".midi": "audio/midi", ".mov": "video/quicktime", ".mp2": "audio/mpeg", ".mp3": "audio/mpeg", ".mp4": "video/mp4", ".mpe": "video/mpeg", ".mpeg": "video/mpeg", ".mpg": "video/mpeg", ".mpga": "audio/mpeg", ".msh": "model/mesh", ".nc": "application/x-netcdf", ".oda": "application/oda", ".ogv": "video/ogv", ".pct": "image/pict", ".pic": "image/pict", ".pict": "image/pict", ".pnt": "image/x-macpaint", ".pntg": "image/x-macpaint", ".ps": "application/postscript", ".qt": "video/quicktime", ".qti": "image/x-quicktime", ".qtif": "image/x-quicktime", ".ram": "audio/x-pn-realaudio", ".rdf": "application/rdf+xml", ".rm": "application/vnd.rn-realmedia", ".roff": "application/x-troff", ".sgm": "text/sgml", ".sgml": "text/sgml", ".silo": "model/mesh", ".skd": "application/x-koan", ".skm": "application/x-koan", ".skp": "application/x-koan", ".skt": "application/x-koan", ".smi": "application/smil", ".smil": "application/smil", ".snd": "audio/basic", ".so": "application/octet-stream", ".svg": "image/svg+xml", ".t": "application/x-troff", ".texi": "application/x-texinfo", ".texinfo": "application/x-texinfo", ".tif": "image/tiff", ".tiff": "image/tiff", ".tr": "application/x-troff", ".txt": "text/plain", ".vrml": "model/vrml", ".vxml": "application/voicexml+xml", ".webm": "video/webm", ".wrl": "model/vrml", ".xht": "application/xhtml+xml", ".xhtml": "application/xhtml+xml", ".xml": "application/xml", ".xsl": "application/xml", ".xslt": "application/xslt+xml", ".xul": "application/vnd.mozilla.xul+xml", ".webp": "image/webp", ".323": "text/h323", ".aab": "application/x-authoware-bin", ".aam": "application/x-authoware-map", ".aas": "application/x-authoware-seg", ".acx": "application/internet-property-stream", ".als": "audio/X-Alpha5", ".amc": "application/x-mpeg", ".ani": "application/octet-stream", ".asd": "application/astound", ".asf": "video/x-ms-asf", ".asn": "application/astound", ".asp": "application/x-asap", ".asr": "video/x-ms-asf", ".asx": "video/x-ms-asf", ".avb": "application/octet-stream", ".awb": "audio/amr-wb", ".axs": "application/olescript", ".bas": "text/plain", ".bin ": "application/octet-stream", ".bld": "application/bld", ".bld2": "application/bld2", ".bpk": "application/octet-stream", ".c": "text/plain", ".cal": "image/x-cals", ".cat": "application/vnd.ms-pkiseccat", ".ccn": "application/x-cnc", ".cco": "application/x-cocoa", ".cer": "application/x-x509-ca-cert", ".cgi": "magnus-internal/cgi", ".chat": "application/x-chat", ".clp": "application/x-msclip", ".cmx": "image/x-cmx", ".co": "application/x-cult3d-object", ".cod": "image/cis-cod", ".conf": "text/plain", ".cpp": "text/plain", ".crd": "application/x-mscardfile", ".crl": "application/pkix-crl", ".crt": "application/x-x509-ca-cert", ".csm": "chemical/x-csml", ".csml": "chemical/x-csml", ".cur": "application/octet-stream", ".dcm": "x-lml/x-evm", ".dcx": "image/x-dcx", ".der": "application/x-x509-ca-cert", ".dhtml": "text/html", ".dot": "application/msword", ".dwf": "drawing/x-dwf", ".dwg": "application/x-autocad", ".dxf": "application/x-autocad", ".ebk": "application/x-expandedbook", ".emb": "chemical/x-embl-dl-nucleotide", ".embl": "chemical/x-embl-dl-nucleotide", ".epub": "application/epub+zip", ".eri": "image/x-eri", ".es": "audio/echospeech", ".esl": "audio/echospeech", ".etc": "application/x-earthtime", ".evm": "x-lml/x-evm", ".evy": "application/envoy", ".fh4": "image/x-freehand", ".fh5": "image/x-freehand", ".fhc": "image/x-freehand", ".fif": "application/fractals", ".flr": "x-world/x-vrml", ".fm": "application/x-maker", ".fpx": "image/x-fpx", ".fvi": "video/isivideo", ".gau": "chemical/x-gaussian-input", ".gca": "application/x-gca-compressed", ".gdb": "x-lml/x-gdb", ".gps": "application/x-gps", ".h": "text/plain", ".hdm": "text/x-hdml", ".hdml": "text/x-hdml", ".hlp": "application/winhlp", ".hta": "application/hta", ".htc": "text/x-component", ".hts": "text/html", ".htt": "text/webviewhtml", ".ifm": "image/gif", ".ifs": "image/ifs", ".iii": "application/x-iphone", ".imy": "audio/melody", ".ins": "application/x-internet-signup", ".ips": "application/x-ipscript", ".ipx": "application/x-ipix", ".isp": "application/x-internet-signup", ".it": "audio/x-mod", ".itz": "audio/x-mod", ".ivr": "i-world/i-vrml", ".j2k": "image/j2k", ".jam": "application/x-jam", ".java": "text/plain", ".jfif": "image/pipeg", ".jpz": "image/jpeg", ".jwc": "application/jwc", ".kjx": "application/x-kjx", ".lak": "x-lml/x-lak", ".lcc": "application/fastman", ".lcl": "application/x-digitalloca", ".lcr": "application/x-digitalloca", ".lgh": "application/lgh", ".lml": "x-lml/x-lml", ".lmlpack": "x-lml/x-lmlpack", ".log": "text/plain", ".lsf": "video/x-la-asf", ".lsx": "video/x-la-asf", ".m13": "application/x-msmediaview", ".m14": "application/x-msmediaview", ".m15": "audio/x-mod", ".m3url": "audio/x-mpegurl", ".m4b": "audio/mp4a-latm", ".ma1": "audio/ma1", ".ma2": "audio/ma2", ".ma3": "audio/ma3", ".ma5": "audio/ma5", ".map": "magnus-internal/imagemap", ".mbd": "application/mbedlet", ".mct": "application/x-mascot", ".mdb": "application/x-msaccess", ".mdz": "audio/x-mod", ".mel": "text/x-vmel", ".mht": "message/rfc822", ".mhtml": "message/rfc822", ".mi": "application/x-mif", ".mil": "image/x-cals", ".mio": "audio/x-mio", ".mmf": "application/x-skt-lbs", ".mng": "video/x-mng", ".mny": "application/x-msmoney", ".moc": "application/x-mocha", ".mocha": "application/x-mocha", ".mod": "audio/x-mod", ".mof": "application/x-yumekara", ".mol": "chemical/x-mdl-molfile", ".mop": "chemical/x-mopac-input", ".mpa": "video/mpeg", ".mpc": "application/vnd.mpohun.certificate", ".mpg4": "video/mp4", ".mpn": "application/vnd.mophun.application", ".mpp": "application/vnd.ms-project", ".mps": "application/x-mapserver", ".mpv2": "video/mpeg", ".mrl": "text/x-mrml", ".mrm": "application/x-mrm", ".msg": "application/vnd.ms-outlook", ".mts": "application/metastream", ".mtx": "application/metastream", ".mtz": "application/metastream", ".mvb": "application/x-msmediaview", ".mzv": "application/metastream", ".nar": "application/zip", ".nbmp": "image/nbmp", ".ndb": "x-lml/x-ndb", ".ndwn": "application/ndwn", ".nif": "application/x-nif", ".nmz": "application/x-scream", ".nokia-op-logo": "image/vnd.nok-oplogo-color", ".npx": "application/x-netfpx", ".nsnd": "audio/nsnd", ".nva": "application/x-neva1", ".nws": "message/rfc822", ".oom": "application/x-AtlasMate-Plugin", ".p10": "application/pkcs10", ".p12": "application/x-pkcs12", ".p7b": "application/x-pkcs7-certificates", ".p7c": "application/x-pkcs7-mime", ".p7m": "application/x-pkcs7-mime", ".p7r": "application/x-pkcs7-certreqresp", ".p7s": "application/x-pkcs7-signature", ".pac": "audio/x-pac", ".pae": "audio/x-epac", ".pan": "application/x-pan", ".pcx": "image/x-pcx", ".pda": "image/x-pda", ".pfr": "application/font-tdpfr", ".pfx": "application/x-pkcs12", ".pko": "application/ynd.ms-pkipko", ".pm": "application/x-perl", ".pma": "application/x-perfmon", ".pmc": "application/x-perfmon", ".pmd": "application/x-pmd", ".pml": "application/x-perfmon", ".pmr": "application/x-perfmon", ".pmw": "application/x-perfmon", ".pnz": "image/png", ".pot,": "application/vnd.ms-powerpoint", ".pps": "application/vnd.ms-powerpoint", ".pqf": "application/x-cprplayer", ".pqi": "application/cprplayer", ".prc": "application/x-prc", ".prf": "application/pics-rules", ".prop": "text/plain", ".proxy": "application/x-ns-proxy-autoconfig", ".ptlk": "application/listenup", ".pub": "application/x-mspublisher", ".pvx": "video/x-pv-pvx", ".qcp": "audio/vnd.qcelp", ".r3t": "text/vnd.rn-realtext3d", ".rar": "application/octet-stream", ".rc": "text/plain", ".rf": "image/vnd.rn-realflash", ".rlf": "application/x-richlink", ".rmf": "audio/x-rmf", ".rmi": "audio/mid", ".rmm": "audio/x-pn-realaudio", ".rmvb": "audio/x-pn-realaudio", ".rnx": "application/vnd.rn-realplayer", ".rp": "image/vnd.rn-realpix", ".rt": "text/vnd.rn-realtext", ".rte": "x-lml/x-gps", ".rtg": "application/metastream", ".rv": "video/vnd.rn-realvideo", ".rwc": "application/x-rogerwilco", ".s3m": "audio/x-mod", ".s3z": "audio/x-mod", ".sca": "application/x-supercard", ".scd": "application/x-msschedule", ".sct": "text/scriptlet", ".sdf": "application/e-score", ".sea": "application/x-stuffit", ".setpay": "application/set-payment-initiation", ".setreg": "application/set-registration-initiation", ".shtml": "text/html", ".shtm": "text/html", ".shw": "application/presentations", ".si6": "image/si6", ".si7": "image/vnd.stiwap.sis", ".si9": "image/vnd.lgtwap.sis", ".slc": "application/x-salsa", ".smd": "audio/x-smd", ".smp": "application/studiom", ".smz": "audio/x-smd", ".spc": "application/x-pkcs7-certificates", ".spr": "application/x-sprite", ".sprite": "application/x-sprite", ".sdp": "application/sdp", ".spt": "application/x-spt", ".sst": "application/vnd.ms-pkicertstore", ".stk": "application/hyperstudio", ".stl": "application/vnd.ms-pkistl", ".stm": "text/html", ".svf": "image/vnd", ".svh": "image/svh", ".svr": "x-world/x-svr", ".swfl": "application/x-shockwave-flash", ".tad": "application/octet-stream", ".talk": "text/x-speech", ".taz": "application/x-tar", ".tbp": "application/x-timbuktu", ".tbt": "application/x-timbuktu", ".tgz": "application/x-compressed", ".thm": "application/vnd.eri.thm", ".tki": "application/x-tkined", ".tkined": "application/x-tkined", ".toc": "application/toc", ".toy": "image/toy", ".trk": "x-lml/x-gps", ".trm": "application/x-msterminal", ".tsi": "audio/tsplayer", ".tsp": "application/dsptype", ".ttf": "application/octet-stream", ".ttz": "application/t-time", ".uls": "text/iuls", ".ult": "audio/x-mod", ".uu": "application/x-uuencode", ".uue": "application/x-uuencode", ".vcf": "text/x-vcard", ".vdo": "video/vdo", ".vib": "audio/vib", ".viv": "video/vivo", ".vivo": "video/vivo", ".vmd": "application/vocaltec-media-desc", ".vmf": "application/vocaltec-media-file", ".vmi": "application/x-dreamcast-vms-info", ".vms": "application/x-dreamcast-vms", ".vox": "audio/voxware", ".vqe": "audio/x-twinvq-plugin", ".vqf": "audio/x-twinvq", ".vql": "audio/x-twinvq", ".vre": "x-world/x-vream", ".vrt": "x-world/x-vrt", ".vrw": "x-world/x-vream", ".vts": "workbook/formulaone", ".wcm": "application/vnd.ms-works", ".wdb": "application/vnd.ms-works", ".web": "application/vnd.xara", ".wi": "image/wavelet", ".wis": "application/x-InstallShield", ".wks": "application/vnd.ms-works", ".wmd": "application/x-ms-wmd", ".wmf": "application/x-msmetafile", ".wmlscript": "text/vnd.wap.wmlscript", ".wmz": "application/x-ms-wmz", ".wpng": "image/x-up-wpng", ".wps": "application/vnd.ms-works", ".wpt": "x-lml/x-gps", ".wri": "application/x-mswrite", ".wrz": "x-world/x-vrml", ".ws": "text/vnd.wap.wmlscript", ".wsc": "application/vnd.wap.wmlscriptc", ".wv": "video/wavelet", ".wxl": "application/x-wxl", ".x-gzip": "application/x-gzip", ".xaf": "x-world/x-vrml", ".xar": "application/vnd.xara", ".xdm": "application/x-xdma", ".xdma": "application/x-xdma", ".xdw": "application/vnd.fujixerox.docuworks", ".xhtm": "application/xhtml+xml", ".xla": "application/vnd.ms-excel", ".xlc": "application/vnd.ms-excel", ".xll": "application/x-excel", ".xlm": "application/vnd.ms-excel", ".xlt": "application/vnd.ms-excel", ".xlw": "application/vnd.ms-excel", ".xm": "audio/x-mod", ".xmz": "audio/x-mod", ".xof": "x-world/x-vrml", ".xpi": "application/x-xpinstall", ".xsit": "text/xml", ".yz1": "application/x-yz1", ".z": "application/x-compress", ".zac": "application/x-zaurus-zac", ".json": "application/json", } // TypeByExtension returns the MIME type associated with the file extension ext. // gets the file's MIME type for HTTP header Content-Type func TypeByExtension(filePath string) string { typ := mime.TypeByExtension(path.Ext(filePath)) if typ == "" { typ = extToMimeType[strings.ToLower(path.Ext(filePath))] } else { if strings.HasPrefix(typ, "text/") && strings.Contains(typ, "charset=") { typ = removeCharsetInMimeType(typ) } } return typ } // Remove charset from mime type func removeCharsetInMimeType(typ string) (str string) { temArr := strings.Split(typ, ";") var builder strings.Builder for i, s := range temArr { tmpStr := strings.Trim(s, " ") if strings.Contains(tmpStr, "charset=") { continue } if i == 0 { builder.WriteString(s) } else { builder.WriteString("; " + s) } } return builder.String() }