HTMLはオンラインプレビューExcel、word、pptを実現します。


officeで提供されるオンラインプレビュー機能https://view.officeapps.live....srcプレビューが必要なファイルを後につないでください。プレビュー機能が実現できないなら、httpの返したConteet-Typeが正しいかどうか確認してください。
ブラウザからファイルを返すときは、ContentTypeを指定する必要があります。以下はOffice 2007の対応する値です。「aplication/vnd. openxmlformatit- oficedocument.wodprocessinml.template」(for.dotx files)「appication/vd.openttttttttxfidedededededededettppppppppspspsplatitittttttttttttfifireretttttttttttttttfifilexxxxxxtttppppppppppppppppppppp- offcedocument.presentationml.sladeshow」(for.ppsx files)「aplication/vnd.openxmlformatis-oficedocument.presentatiml.template」(for.potx files)「aplication/vnd.openxmlformas- oficedocument.spreadshshetttttfifixxxxtttttttttttttttttttttttttttttttffffffttttttttxxxxxxxxxxxxxxxxttttttttppppppppppppppppppppppppplate」(for.xltx files)
参照リンク:
https://www.cnblogs.com/huang...officeオンラインプレビュードキュメント:https://products.office.com/z...officeファイル対応のcontentType:https://www.cnblogs.com/diony...
バグ解決記録:
もともとウェブサイトにはExcelをダウンロードする必要がありました。最初に実現したのはjs reportを使って実現しましたが、このサービスは有料で、しかも機能が強すぎて、学習コストが高いです。
私たちはExcelをダウンロードしたいだけです。後はExcel.jsという倉庫を探して実現します。
Excelをダウンロードするのは大丈夫です。ファイルフローを生成してから、直接steamに戻ります。ある日、上司はオンラインプレビューExcelでいくつかの案を考えたことがあると言いました。
  • 自分で解析エクセルを実現し、直接テーブルの形でHTML
  • に戻ります。
  • サードパーティjsライブラリを探して、Excelプレビューを実現します。
  • その他(既存のコードをできるだけ少なく修正する)
  • 他の案を探す時、他のMicrosoft Office 365はオンラインプレビューの機能を提供しています。https://view.officeapps.live....src後はExcelのダウンロード住所について行けばいいです。
    しかし、テストしてみましたが、成功しませんでした。私たちのサーバーはインターフェイスを通してExcelのURLをダウンロードして、上記のsrcの後ろにつなぎ合わせています。プレビューができなくて、エラーが発生します。
    しかし、静的リソースディレクトリにアクセスするなら、srcの後につなぎ合わせることができます。例えば、http://a.com/excel.xlsx オンラインプレビューができますhttps://a.com/download/report... オンラインプレビューができないなら、私はreponse Headerの設定の問題を疑っていますが、具体的にはどの配置の項目か分かりません。
    最初はhttpsの問題だと思っていましたが、テスト後、httpsとは関係なく、httpsとhttpプロトコルはすべてオンラインプレビューができます。URLに拡張子がないかどうかも考えています。officeはこのファイルの種類を認識できません。しかし、ダウンロード保存時には対応するファイルの拡張子名が自動的に認識されます。したがって、URLに拡張子がないという問題ではないはずです。サーバのバックエンドはNode.jsを使用しています。フレームはexpressを使用しています。Excelを静的なリソースファイルディレクトリの下に置くと、正常にプレビューできます。ファイルを静的なリソースフォルダの下に置いてアクセスすると、expressの中のレスポンス.sendFileメソッドを呼び出すのと同じです。私たちのインターフェースで使用します。
    res.set({
        'Content-Disposition': 'Attachment; filename="report.xlsx'
    });
    を設定して、レスポンスのheaderを設定して、ユーザーがファイルをダウンロードしてからローカルに保存する時に、デフォルトはExcelの拡張子です。
    はい、基礎知識が足りないので、expressのソースコードの中でsendFileの方法には何か秘密がありますか?modules/express/lib/レスポンス.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);
        }
      });
    };
    実際にsendFileで呼び出されたのはnode_modules/send/index.js方法であり、sendモジュールのコードを見て、発見された。
    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はファイルを送る時、上述のコードを呼び出すことができます。拡張子によると、名来でContentt-Typeを取得します。mimeのソースを見ると、mimeの中で、requireはtype.jsonになります。type.jsonは各種の拡張子の名前に対応するcontentt-typeです。
    元々のコードにはContent-Dispossitionだけが設定されていますので、この要求を代表して返送されたのはファイルです。しかし、office 365は実際にContent-Typeで取得しています。現在プレビューが必要なのはどのタイプのファイルですか?
    mimeライブラリのtype.jsonのサフィックス名に対応するContentTypeは、スピードチェックシートとして使用できます。
    {
      "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"
      ],
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        "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"
      ]
    }