内容简介:使用office提供的在线预览功能src后面接你需要预览的文件下载地址.
使用office提供的在线预览功能
https://view.officeapps.live....
src后面接你需要预览的文件下载地址.
如果不能实现预览功能,提示报错
请检查http返回的Content-Type是否正确
当从浏览器返回一个文件时,需要指定ContentType,以下是Office2007对应的值:
"application/vnd.openxmlformats-officedocument.wordprocessingml.template" (for .dotx files)
"application/vnd.openxmlformats-officedocument.presentationml.presentation" (for .pptx files)
"application/vnd.openxmlformats-officedocument.presentationml.slideshow" (for .ppsx files)
"application/vnd.openxmlformats-officedocument.presentationml.template" (for .potx files)
"application/vnd.openxmlformats-officedocument.spreadsheetml.sheet" (for .xlsx files)
"application/vnd.openxmlformats-officedocument.spreadsheetml.template" (for .xltx files)
参考链接:
https://www.cnblogs.com/huang...
office在线预览文档: https://products.office.com/z...
office文件对应的contentType: https://www.cnblogs.com/diony...
bug解决记录:
原来网站中有个需要,是下载Excel.
最开始实现的时候,是使用jsreport来实现,但是该服务收费,并且由于功能太强大了,学习成本高.
因为我们只是想要下载Excel,后面就找了Excel.js这个库来实现.
下载Excel是没问题,生成文件流以后,,直接返回steam,有一天,领导说,需要在线预览Excel:fearful:
考虑过几种方案,
- 自己实现解析Excel,直接以表格的样式返回HTML
- 找第三方js库,来实现Excel预览,
- 其他(尽可能少改动现有代码)
在找其他方案的时候,发现,其他Microsoft Office365提供了在线预览的功能,只需要
https://view.officeapps.live....
src后面跟上Excel的下载地址就行.
但是测试了一下,发现并不能成功.因为我们服务器上通过接口下载Excel的URL拼接在上面src后面,不能预览,会报错.
但是,如果是访问静态资源目录,拼接在src后面,是可以的.
比如: http://a.com/excel.xlsx 可以在线预览
https://a.com/download/report... 不能在线预览
我就怀疑是response Header设置问题,但是,不清楚具体是哪个配置项.
最开始以为是https的问题,但是测试后发现,与https无关,https和http协议都能在线预览
也考虑过是不是URL上没用后缀,导致office无法识别该文件是什么类型,但是下载保存的时候,会自动识别出对应的文件后缀名,所以就肯定不是URL上没有后缀名导致的问题.
服务器后端使用的是Node.js,框架用的是express,如果将Excel放置在静态资源文件目录下,是能正常预览.
如果是将文件放在静态资源文件夹下访问,等同于调用express中的res.sendFile(filePath)方法.
我们的接口中,使用
res.set({ 'Content-Disposition': 'Attachment; filename="report.xlsx' });
来设置response的header,保证用户下载文件后存储到本地时默认是Excel后缀.
好,因为基础知识不牢,只能去查看express的源码中sendFile()方法有什么奥秘了
node_modules/express/lib/response.js
res.sendFile = function sendFile(path, options, callback) { var done = callback; var req = this.req; var res = this; var next = req.next; var opts = options || {}; if (!path) { throw new TypeError('path argument is required to res.sendFile'); } // support function as second arg if (typeof options === 'function') { done = options; opts = {}; } if (!opts.root && !isAbsolute(path)) { throw new TypeError('path must be absolute or specify root to res.sendFile'); } // create file stream var pathname = encodeURI(path); var file = send(req, pathname, opts); // transfer sendfile(res, file, opts, function (err) { if (done) return done(err); if (err && err.code === 'EISDIR') return next(); // next() all but write errors if (err && err.code !== 'ECONNABORTED' && err.syscall !== 'write') { next(err); } }); };
可以看到,实际上sendFile调用的是 node_modules/send/index.js
方法,
在看send模块中的代码,发现
var mime = require('mime') SendStream.prototype.type = function type (path) { var res = this.res if (res.getHeader('Content-Type')) return var type = mime.lookup(path) if (!type) { debug('no content-type') return } var charset = mime.charsets.lookup(type) debug('content-type %s', type) res.setHeader('Content-Type', type + (charset ? '; charset=' + charset : '')) }
express在发送文件时,会调用上述代码,根据后缀名来获取Content-Type.
在查看mime的源码,会发现在mime中,require了一个type.json,而type.json就是各种后缀名对应的content-type
因为我们原来的代码中,只设置了Content-Disposition,代表该请求返回的是一个文件.
但是office365实际上是通过Content-Type来获取,当前需要预览的是什么类型的文件(word,ppt,Excel),所以,需要设置对应的Content-Type才能正确实现预览功能
mime库中type.json中后缀名对应的ContentType,可以用来做速查表
{ "application/andrew-inset": [ "ez" ], "application/applixware": [ "aw" ], "application/atom+xml": [ "atom" ], "application/atomcat+xml": [ "atomcat" ], "application/atomsvc+xml": [ "atomsvc" ], "application/bdoc": [ "bdoc" ], "application/ccxml+xml": [ "ccxml" ], "application/cdmi-capability": [ "cdmia" ], "application/cdmi-container": [ "cdmic" ], "application/cdmi-domain": [ "cdmid" ], "application/cdmi-object": [ "cdmio" ], "application/cdmi-queue": [ "cdmiq" ], "application/cu-seeme": [ "cu" ], "application/dash+xml": [ "mpd" ], "application/davmount+xml": [ "davmount" ], "application/docbook+xml": [ "dbk" ], "application/dssc+der": [ "dssc" ], "application/dssc+xml": [ "xdssc" ], "application/ecmascript": [ "ecma" ], "application/emma+xml": [ "emma" ], "application/epub+zip": [ "epub" ], "application/exi": [ "exi" ], "application/font-tdpfr": [ "pfr" ], "application/font-woff": [ "woff" ], "application/font-woff2": [ "woff2" ], "application/geo+json": [ "geojson" ], "application/gml+xml": [ "gml" ], "application/gpx+xml": [ "gpx" ], "application/gxf": [ "gxf" ], "application/gzip": [ "gz" ], "application/hyperstudio": [ "stk" ], "application/inkml+xml": [ "ink", "inkml" ], "application/ipfix": [ "ipfix" ], "application/java-archive": [ "jar", "war", "ear" ], "application/java-serialized-object": [ "ser" ], "application/java-vm": [ "class" ], "application/javascript": [ "js", "mjs" ], "application/json": [ "json", "map" ], "application/json5": [ "json5" ], "application/jsonml+json": [ "jsonml" ], "application/ld+json": [ "jsonld" ], "application/lost+xml": [ "lostxml" ], "application/mac-binhex40": [ "hqx" ], "application/mac-compactpro": [ "cpt" ], "application/mads+xml": [ "mads" ], "application/manifest+json": [ "webmanifest" ], "application/marc": [ "mrc" ], "application/marcxml+xml": [ "mrcx" ], "application/mathematica": [ "ma", "nb", "mb" ], "application/mathml+xml": [ "mathml" ], "application/mbox": [ "mbox" ], "application/mediaservercontrol+xml": [ "mscml" ], "application/metalink+xml": [ "metalink" ], "application/metalink4+xml": [ "meta4" ], "application/mets+xml": [ "mets" ], "application/mods+xml": [ "mods" ], "application/mp21": [ "m21", "mp21" ], "application/mp4": [ "mp4s", "m4p" ], "application/msword": [ "doc", "dot" ], "application/mxf": [ "mxf" ], "application/octet-stream": [ "bin", "dms", "lrf", "mar", "so", "dist", "distz", "pkg", "bpk", "dump", "elc", "deploy", "exe", "dll", "deb", "dmg", "iso", "img", "msi", "msp", "msm", "buffer" ], "application/oda": [ "oda" ], "application/oebps-package+xml": [ "opf" ], "application/ogg": [ "ogx" ], "application/omdoc+xml": [ "omdoc" ], "application/onenote": [ "onetoc", "onetoc2", "onetmp", "onepkg" ], "application/oxps": [ "oxps" ], "application/patch-ops-error+xml": [ "xer" ], "application/pdf": [ "pdf" ], "application/pgp-encrypted": [ "pgp" ], "application/pgp-signature": [ "asc", "sig" ], "application/pics-rules": [ "prf" ], "application/pkcs10": [ "p10" ], "application/pkcs7-mime": [ "p7m", "p7c" ], "application/pkcs7-signature": [ "p7s" ], "application/pkcs8": [ "p8" ], "application/pkix-attr-cert": [ "ac" ], "application/pkix-cert": [ "cer" ], "application/pkix-crl": [ "crl" ], "application/pkix-pkipath": [ "pkipath" ], "application/pkixcmp": [ "pki" ], "application/pls+xml": [ "pls" ], "application/postscript": [ "ai", "eps", "ps" ], "application/prs.cww": [ "cww" ], "application/pskc+xml": [ "pskcxml" ], "application/rdf+xml": [ "rdf" ], "application/reginfo+xml": [ "rif" ], "application/relax-ng-compact-syntax": [ "rnc" ], "application/resource-lists+xml": [ "rl" ], "application/resource-lists-diff+xml": [ "rld" ], "application/rls-services+xml": [ "rs" ], "application/rpki-ghostbusters": [ "gbr" ], "application/rpki-manifest": [ "mft" ], "application/rpki-roa": [ "roa" ], "application/rsd+xml": [ "rsd" ], "application/rss+xml": [ "rss" ], "application/rtf": [ "rtf" ], "application/sbml+xml": [ "sbml" ], "application/scvp-cv-request": [ "scq" ], "application/scvp-cv-response": [ "scs" ], "application/scvp-vp-request": [ "spq" ], "application/scvp-vp-response": [ "spp" ], "application/sdp": [ "sdp" ], "application/set-payment-initiation": [ "setpay" ], "application/set-registration-initiation": [ "setreg" ], "application/shf+xml": [ "shf" ], "application/smil+xml": [ "smi", "smil" ], "application/sparql-query": [ "rq" ], "application/sparql-results+xml": [ "srx" ], "application/srgs": [ "gram" ], "application/srgs+xml": [ "grxml" ], "application/sru+xml": [ "sru" ], "application/ssdl+xml": [ "ssdl" ], "application/ssml+xml": [ "ssml" ], "application/tei+xml": [ "tei", "teicorpus" ], "application/thraud+xml": [ "tfi" ], "application/timestamped-data": [ "tsd" ], "application/vnd.3gpp.pic-bw-large": [ "plb" ], "application/vnd.3gpp.pic-bw-small": [ "psb" ], "application/vnd.3gpp.pic-bw-var": [ "pvb" ], "application/vnd.3gpp2.tcap": [ "tcap" ], "application/vnd.3m.post-it-notes": [ "pwn" ], "application/vnd.accpac.simply.aso": [ "aso" ], "application/vnd.accpac.simply.imp": [ "imp" ], "application/vnd.acucobol": [ "acu" ], "application/vnd.acucorp": [ "atc", "acutc" ], "application/vnd.adobe.air-application-installer-package+zip": [ "air" ], "application/vnd.adobe.formscentral.fcdt": [ "fcdt" ], "application/vnd.adobe.fxp": [ "fxp", "fxpl" ], "application/vnd.adobe.xdp+xml": [ "xdp" ], "application/vnd.adobe.xfdf": [ "xfdf" ], "application/vnd.ahead.space": [ "ahead" ], "application/vnd.airzip.filesecure.azf": [ "azf" ], "application/vnd.airzip.filesecure.azs": [ "azs" ], "application/vnd.amazon.ebook": [ "azw" ], "application/vnd.americandynamics.acc": [ "acc" ], "application/vnd.amiga.ami": [ "ami" ], "application/vnd.android.package-archive": [ "apk" ], "application/vnd.anser-web-certificate-issue-initiation": [ "cii" ], "application/vnd.anser-web-funds-transfer-initiation": [ "fti" ], "application/vnd.antix.game-component": [ "atx" ], "application/vnd.apple.installer+xml": [ "mpkg" ], "application/vnd.apple.mpegurl": [ "m3u8" ], "application/vnd.apple.pkpass": [ "pkpass" ], "application/vnd.aristanetworks.swi": [ "swi" ], "application/vnd.astraea-software.iota": [ "iota" ], "application/vnd.audiograph": [ "aep" ], "application/vnd.blueice.multipass": [ "mpm" ], "application/vnd.bmi": [ "bmi" ], "application/vnd.businessobjects": [ "rep" ], "application/vnd.chemdraw+xml": [ "cdxml" ], "application/vnd.chipnuts.karaoke-mmd": [ "mmd" ], "application/vnd.cinderella": [ "cdy" ], "application/vnd.claymore": [ "cla" ], "application/vnd.cloanto.rp9": [ "rp9" ], "application/vnd.clonk.c4group": [ "c4g", "c4d", "c4f", "c4p", "c4u" ], "application/vnd.cluetrust.cartomobile-config": [ "c11amc" ], "application/vnd.cluetrust.cartomobile-config-pkg": [ "c11amz" ], "application/vnd.commonspace": [ "csp" ], "application/vnd.contact.cmsg": [ "cdbcmsg" ], "application/vnd.cosmocaller": [ "cmc" ], "application/vnd.crick.clicker": [ "clkx" ], "application/vnd.crick.clicker.keyboard": [ "clkk" ], "application/vnd.crick.clicker.palette": [ "clkp" ], "application/vnd.crick.clicker.template": [ "clkt" ], "application/vnd.crick.clicker.wordbank": [ "clkw" ], "application/vnd.criticaltools.wbs+xml": [ "wbs" ], "application/vnd.ctc-posml": [ "pml" ], "application/vnd.cups-ppd": [ "ppd" ], "application/vnd.curl.car": [ "car" ], "application/vnd.curl.pcurl": [ "pcurl" ], "application/vnd.dart": [ "dart" ], "application/vnd.data-vision.rdz": [ "rdz" ], "application/vnd.dece.data": [ "uvf", "uvvf", "uvd", "uvvd" ], "application/vnd.dece.ttml+xml": [ "uvt", "uvvt" ], "application/vnd.dece.unspecified": [ "uvx", "uvvx" ], "application/vnd.dece.zip": [ "uvz", "uvvz" ], "application/vnd.denovo.fcselayout-link": [ "fe_launch" ], "application/vnd.dna": [ "dna" ], "application/vnd.dolby.mlp": [ "mlp" ], "application/vnd.dpgraph": [ "dpg" ], "application/vnd.dreamfactory": [ "dfac" ], "application/vnd.ds-keypoint": [ "kpxx" ], "application/vnd.dvb.ait": [ "ait" ], "application/vnd.dvb.service": [ "svc" ], "application/vnd.dynageo": [ "geo" ], "application/vnd.ecowin.chart": [ "mag" ], "application/vnd.enliven": [ "nml" ], "application/vnd.epson.esf": [ "esf" ], "application/vnd.epson.msf": [ "msf" ], "application/vnd.epson.quickanime": [ "qam" ], "application/vnd.epson.salt": [ "slt" ], "application/vnd.epson.ssf": [ "ssf" ], "application/vnd.eszigno3+xml": [ "es3", "et3" ], "application/vnd.ezpix-album": [ "ez2" ], "application/vnd.ezpix-package": [ "ez3" ], "application/vnd.fdf": [ "fdf" ], "application/vnd.fdsn.mseed": [ "mseed" ], "application/vnd.fdsn.seed": [ "seed", "dataless" ], "application/vnd.flographit": [ "gph" ], "application/vnd.fluxtime.clip": [ "ftc" ], "application/vnd.framemaker": [ "fm", "frame", "maker", "book" ], "application/vnd.frogans.fnc": [ "fnc" ], "application/vnd.frogans.ltf": [ "ltf" ], "application/vnd.fsc.weblaunch": [ "fsc" ], "application/vnd.fujitsu.oasys": [ "oas" ], "application/vnd.fujitsu.oasys2": [ "oa2" ], "application/vnd.fujitsu.oasys3": [ "oa3" ], "application/vnd.fujitsu.oasysgp": [ "fg5" ], "application/vnd.fujitsu.oasysprs": [ "bh2" ], "application/vnd.fujixerox.ddd": [ "ddd" ], "application/vnd.fujixerox.docuworks": [ "xdw" ], "application/vnd.fujixerox.docuworks.binder": [ "xbd" ], "application/vnd.fuzzysheet": [ "fzs" ], "application/vnd.genomatix.tuxedo": [ "txd" ], "application/vnd.geogebra.file": [ "ggb" ], "application/vnd.geogebra.tool": [ "ggt" ], "application/vnd.geometry-explorer": [ "gex", "gre" ], "application/vnd.geonext": [ "gxt" ], "application/vnd.geoplan": [ "g2w" ], "application/vnd.geospace": [ "g3w" ], "application/vnd.gmx": [ "gmx" ], "application/vnd.google-apps.document": [ "gdoc" ], "application/vnd.google-apps.presentation": [ "gslides" ], "application/vnd.google-apps.spreadsheet": [ "gsheet" ], "application/vnd.google-earth.kml+xml": [ "kml" ], "application/vnd.google-earth.kmz": [ "kmz" ], "application/vnd.grafeq": [ "gqf", "gqs" ], "application/vnd.groove-account": [ "gac" ], "application/vnd.groove-help": [ "ghf" ], "application/vnd.groove-identity-message": [ "gim" ], "application/vnd.groove-injector": [ "grv" ], "application/vnd.groove-tool-message": [ "gtm" ], "application/vnd.groove-tool-template": [ "tpl" ], "application/vnd.groove-vcard": [ "vcg" ], "application/vnd.hal+xml": [ "hal" ], "application/vnd.handheld-entertainment+xml": [ "zmm" ], "application/vnd.hbci": [ "hbci" ], "application/vnd.hhe.lesson-player": [ "les" ], "application/vnd.hp-hpgl": [ "hpgl" ], "application/vnd.hp-hpid": [ "hpid" ], "application/vnd.hp-hps": [ "hps" ], "application/vnd.hp-jlyt": [ "jlt" ], "application/vnd.hp-pcl": [ "pcl" ], "application/vnd.hp-pclxl": [ "pclxl" ], "application/vnd.hydrostatix.sof-data": [ "sfd-hdstx" ], "application/vnd.ibm.minipay": [ "mpy" ], "application/vnd.ibm.modcap": [ "afp", "listafp", "list3820" ], "application/vnd.ibm.rights-management": [ "irm" ], "application/vnd.ibm.secure-container": [ "sc" ], "application/vnd.iccprofile": [ "icc", "icm" ], "application/vnd.igloader": [ "igl" ], "application/vnd.immervision-ivp": [ "ivp" ], "application/vnd.immervision-ivu": [ "ivu" ], "application/vnd.insors.igm": [ "igm" ], "application/vnd.intercon.formnet": [ "xpw", "xpx" ], "application/vnd.intergeo": [ "i2g" ], "application/vnd.intu.qbo": [ "qbo" ], "application/vnd.intu.qfx": [ "qfx" ], "application/vnd.ipunplugged.rcprofile": [ "rcprofile" ], "application/vnd.irepository.package+xml": [ "irp" ], "application/vnd.is-xpr": [ "xpr" ], "application/vnd.isac.fcs": [ "fcs" ], "application/vnd.jam": [ "jam" ], "application/vnd.jcp.javame.midlet-rms": [ "rms" ], "application/vnd.jisp": [ "jisp" ], "application/vnd.joost.joda-archive": [ "joda" ], "application/vnd.kahootz": [ "ktz", "ktr" ], "application/vnd.kde.karbon": [ "karbon" ], "application/vnd.kde.kchart": [ "chrt" ], "application/vnd.kde.kformula": [ "kfo" ], "application/vnd.kde.kivio": [ "flw" ], "application/vnd.kde.kontour": [ "kon" ], "application/vnd.kde.kpresenter": [ "kpr", "kpt" ], "application/vnd.kde.kspread": [ "ksp" ], "application/vnd.kde.kword": [ "kwd", "kwt" ], "application/vnd.kenameaapp": [ "htke" ], "application/vnd.kidspiration": [ "kia" ], "application/vnd.kinar": [ "kne", "knp" ], "application/vnd.koan": [ "skp", "skd", "skt", "skm" ], "application/vnd.kodak-descriptor": [ "sse" ], "application/vnd.las.las+xml": [ "lasxml" ], "application/vnd.llamagraphics.life-balance.desktop": [ "lbd" ], "application/vnd.llamagraphics.life-balance.exchange+xml": [ "lbe" ], "application/vnd.lotus-1-2-3": [ "123" ], "application/vnd.lotus-approach": [ "apr" ], "application/vnd.lotus-freelance": [ "pre" ], "application/vnd.lotus-notes": [ "nsf" ], "application/vnd.lotus-organizer": [ "org" ], "application/vnd.lotus-screencam": [ "scm" ], "application/vnd.lotus-wordpro": [ "lwp" ], "application/vnd.macports.portpkg": [ "portpkg" ], "application/vnd.mcd": [ "mcd" ], "application/vnd.medcalcdata": [ "mc1" ], "application/vnd.mediastation.cdkey": [ "cdkey" ], "application/vnd.mfer": [ "mwf" ], "application/vnd.mfmp": [ "mfm" ], "application/vnd.micrografx.flo": [ "flo" ], "application/vnd.micrografx.igx": [ "igx" ], "application/vnd.mif": [ "mif" ], "application/vnd.mobius.daf": [ "daf" ], "application/vnd.mobius.dis": [ "dis" ], "application/vnd.mobius.mbk": [ "mbk" ], "application/vnd.mobius.mqy": [ "mqy" ], "application/vnd.mobius.msl": [ "msl" ], "application/vnd.mobius.plc": [ "plc" ], "application/vnd.mobius.txf": [ "txf" ], "application/vnd.mophun.application": [ "mpn" ], "application/vnd.mophun.certificate": [ "mpc" ], "application/vnd.mozilla.xul+xml": [ "xul" ], "application/vnd.ms-artgalry": [ "cil" ], "application/vnd.ms-cab-compressed": [ "cab" ], "application/vnd.ms-excel": [ "xls", "xlm", "xla", "xlc", "xlt", "xlw" ], "application/vnd.ms-excel.addin.macroenabled.12": [ "xlam" ], 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"text/xml": [ "xml" ], "text/yaml": [ "yaml", "yml" ], "video/3gpp": [ "3gp", "3gpp" ], "video/3gpp2": [ "3g2" ], "video/h261": [ "h261" ], "video/h263": [ "h263" ], "video/h264": [ "h264" ], "video/jpeg": [ "jpgv" ], "video/jpm": [ "jpm", "jpgm" ], "video/mj2": [ "mj2", "mjp2" ], "video/mp2t": [ "ts" ], "video/mp4": [ "mp4", "mp4v", "mpg4" ], "video/mpeg": [ "mpeg", "mpg", "mpe", "m1v", "m2v" ], "video/ogg": [ "ogv" ], "video/quicktime": [ "qt", "mov" ], "video/vnd.dece.hd": [ "uvh", "uvvh" ], "video/vnd.dece.mobile": [ "uvm", "uvvm" ], "video/vnd.dece.pd": [ "uvp", "uvvp" ], "video/vnd.dece.sd": [ "uvs", "uvvs" ], "video/vnd.dece.video": [ "uvv", "uvvv" ], "video/vnd.dvb.file": [ "dvb" ], "video/vnd.fvt": [ "fvt" ], "video/vnd.mpegurl": [ "mxu", "m4u" ], "video/vnd.ms-playready.media.pyv": [ "pyv" ], "video/vnd.uvvu.mp4": [ "uvu", "uvvu" ], "video/vnd.vivo": [ "viv" ], "video/webm": [ "webm" ], "video/x-f4v": [ "f4v" ], "video/x-fli": [ "fli" ], "video/x-flv": [ "flv" ], "video/x-m4v": [ "m4v" ], "video/x-matroska": [ "mkv", "mk3d", "mks" ], "video/x-mng": [ "mng" ], "video/x-ms-asf": [ "asf", "asx" ], "video/x-ms-vob": [ "vob" ], "video/x-ms-wm": [ "wm" ], "video/x-ms-wmv": [ "wmv" ], "video/x-ms-wmx": [ "wmx" ], "video/x-ms-wvx": [ "wvx" ], "video/x-msvideo": [ "avi" ], "video/x-sgi-movie": [ "movie" ], "video/x-smv": [ "smv" ], "x-conference/x-cooltalk": [ "ice" ] }
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疯狂Java讲义
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