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File type in ADODB.Stream

Posted on 2006-06-22
6
Medium Priority
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Last Modified: 2013-12-03
Hi Experts,

To offer visitors a download without giving away the path to the file, I implemented the code as described in Microsofts Knowledge Base article "Use of the ADODB.Stream Object to Send Binary Files to the Browser through ASP" (http://support.microsoft.com/support/kb/articles/q276/4/88.asp).

Most of the files I want to send are PDF, so I changed
            Response.ContentType = "application/octet-stream"
to
            Response.ContentType = "application/pdf"

Is there any way to set the mime type automatically?
0
Comment
Question by:WebJoe
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6 Comments
 
LVL 7

Accepted Solution

by:
Hecatonchires earned 750 total points
ID: 16966700
dim fileExt
fileExt = ucase(right(objFile.name))
select case fileExt
     case "PDF"
        response.contentType= "application/pdf"
     case "TXT"
        response.contentType= "text"
     case "HTM"
        response.contentType = "text/html"
     default
        response.contentType = "application/octet-stream"
end select
0
 

Author Comment

by:WebJoe
ID: 16967668
I was afraid that would be the answer ... nothing more elegant, like a property of some object (other than file, I already checked that)?
0
 

Author Comment

by:WebJoe
ID: 16971079
so to have a (hopefully) correct content type, you'd have to do

<snip>
        sFileExtension = UCase(Right(sFile, (Len(sFile) - InStrRev(sFile, ".", -1, vbTextCompare))))

        '   Set the content type and stream type according to file extension
        Select Case sFileExtension
            Case "3DM", "3DMF", "QD3", "QD3D"
                sContentType = "x-world/x-3dmf"
            Case "A", "ARC", "ARJ", "BIN", "COM", "DUMP", "EXE", "LHA", "LHX", "LZH", "LZX", "O", "PSD", "SAVEME", "ZOO"
                sContentType = "application/octet-stream"
            Case "AAB"
                sContentType = "application/x-authorware-bin"
            Case "AAM"
                sContentType = "application/x-authorware-map"
            Case "AAS"
                sContentType = "application/x-authorware-seg"
            Case "ABC"
                sContentType = "text/vnd.abc"
            Case "ACGI", "HTM", "HTML", "HTMLS", "HTX", "SHTML"
                sContentType = "text/html"
            Case "AFL"
                sContentType = "video/animaflex"
            Case "AI", "EPS", "PS"
                sContentType = "application/postscript"
            Case "AIF", "AIFC", "AIFF"
                sContentType = "audio/aiff"
            Case "AIM"
                sContentType = "application/x-aim"
            Case "AIP"
                sContentType = "text/x-audiosoft-intra"
            Case "ANI"
                sContentType = "application/x-navi-animation"
            Case "AOS"
                sContentType = "application/x-nokia-9000-communicator-add-on-software"
            Case "APS"
                sContentType = "application/mime"
            Case "ART"
                sContentType = "image/x-jg"
            Case "ASM", "S"
                sContentType = "text/x-asm"
            Case "ASP"
                sContentType = "text/asp"
            Case "ASX", "ASF"
                sContentType = "video/x-ms-asf "
            Case "AU"
                sContentType = "audio/x-au"
            Case "AVI"
                sContentType = "video/msvideo"
            Case "AVS"
                sContentType = "video/avs-video"
            Case "BCPIO"
                sContentType = "application/x-bcpio"
            Case "BM", "BMP"
                sContentType = "image/bmp"
            Case "BMP"
                sContentType = "image/x-windows-bmp"
            Case "BOO", "BOOK"
                sContentType = "application/book"
            Case "BOZ", "BZ2"
                sContentType = "application/x-bzip2"
            Case "BSH", "SHAR"
                sContentType = "application/x-bsh"
            Case "BZ"
                sContentType = "application/x-bzip"
            Case "C", "C++", "CC", "CONF", "CXX", "DEF", "F", "F90", "FOR", "G", "H", "HH", "IDC", "JAV", "JAVA", "JS", "LIST", "LOG", "LST", "M", "MAR", "PL", "SDML", "TEXT", "TXT"
                sContentType = "text/plain"
            Case "CAT"
                sContentType = "application/vnd.ms-pki.seccat"
            Case "CCAD"
                sContentType = "application/clariscad"
            Case "CCO"
                sContentType = "application/x-cocoa"
            Case "CDF"
                sContentType = "application/cdf"
            Case "CER", "CRT"
                sContentType = "application/pkix-cert"
            Case "CHA", "CHAT"
                sContentType = "application/x-chat"
            Case "CLASS"
                sContentType = "application/java"
            Case "CPIO"
                sContentType = "application/x-cpio"
            Case "CPP"
                sContentType = "text/x-c"
            Case "CPT"
                sContentType = "application/mac-compactpro"
            Case "CRL"
                sContentType = "application/pkix-crl"
            Case "CSH"
                sContentType = "application/x-csh"
            Case "CSH"
                sContentType = "text/x-script.csh"
            Case "CSS"
                sContentType = "text/css"
            Case "DCR", "DIR", "DXR"
                sContentType = "application/x-director"
            Case "DEEPV"
                sContentType = "application/x-deepv"
            Case "DER"
                sContentType = "application/x-x509-ca-cert"
            Case "DIF", "DV"
                sContentType = "video/x-dv"
            Case "DL"
                sContentType = "video/dl"
            Case "DOC", "DOT", "W6W", "WIZ", "WORD"
                sContentType = "application/msword"
            Case "DP"
                sContentType = "application/commonground"
            Case "DRW"
                sContentType = "application/drafting"
            Case "DVI"
                sContentType = "application/x-dvi"
            Case "DWF"
                sContentType = "model/vnd.dwf"
            Case "DWG", "DXF", "SVF"
                sContentType = "image/vnd.dwg"
            Case "EL"
                sContentType = "text/x-script.elisp"
            Case "ELC"
                sContentType = "application/x-elc"
            Case "ENV"
                sContentType = "application/x-envoy"
            Case "ES"
                sContentType = "application/x-esrehber"
            Case "ETX"
                sContentType = "text/x-setext"
            Case "EVY"
                sContentType = "application/envoy"
            Case "F77"
                sContentType = "text/x-fortran"
            Case "FDF"
                sContentType = "application/vnd.fdf"
            Case "FIF"
                sContentType = "image/fif"
            Case "FLI"
                sContentType = "video/fli"
            Case "FLO", "TURBOT            image/florian"
            Case "FLX"
                sContentType = "text/vnd.fmi.flexstor"
            Case "FMF"
                sContentType = "video/x-atomic3d-feature"
            Case "FPX"
                sContentType = "image/vnd.fpx"
            Case "FRL"
                sContentType = "application/freeloader"
            Case "FUNK", "MY", "PFUNK"
                sContentType = "audio/make"
            Case "G3"
                sContentType = "image/g3fax"
            Case "GIF"
                sContentType = "image/gif"
            Case "GL"
                sContentType = "video/gl"
            Case "GSD", "GSM"
                sContentType = "audio/x-gsm"
            Case "GSP"
                sContentType = "application/x-gsp"
            Case "GSS"
                sContentType = "application/x-gss"
            Case "GTAR"
                sContentType = "application/x-gtar"
            Case "GZ", "GZIP"
                sContentType = "application/x-gzip"
            Case "HDF"
                sContentType = "application/x-hdf"
            Case "HELP"
                sContentType = "application/x-helpfile"
            Case "HGL", "HPG", "HPGL"
                sContentType = "application/vnd.hp-hpgl"
            Case "HLB"
                sContentType = "text/x-script"
            Case "HLP"
                sContentType = "application/hlp"
            Case "HQX"
                sContentType = "application/binhex"
            Case "HTA"
                sContentType = "application/hta"
            Case "HTC"
                sContentType = "text/x-component"
            Case "HTT"
                sContentType = "text/webviewhtml"
            Case "ICE"
                sContentType = "x-conference/x-cooltalk"
            Case "ICO"
                sContentType = "image/x-icon"
            Case "IEF", "IEFS"
                sContentType = "image/ief"
            Case "IGES", "IGS"
                sContentType = "model/iges"
            Case "IMA"
                sContentType = "application/x-ima"
            Case "IMAP"
                sContentType = "application/x-httpd-imap"
            Case "INF"
                sContentType = "application/inf"
            Case "INS"
                sContentType = "application/x-internett-signup"
            Case "IP"
                sContentType = "application/x-ip2"
            Case "ISU"
                sContentType = "video/x-isvideo"
            Case "IT"
                sContentType = "audio/it"
            Case "IV"
                sContentType = "application/x-inventor"
            Case "IVR"
                sContentType = "i-world/i-vrml"
            Case "IVY"
                sContentType = "application/x-livescreen"
            Case "JAM"
                sContentType = "audio/x-jam"
            Case "JCM"
                sContentType = "application/x-java-commerce"
            Case "JFIF", "JFIF-TBNL", "JPE", "JPEG", "JPG"
                sContentType = "image/jpeg"
            Case "JPS"
                sContentType = "image/x-jps"
            Case "JUT"
                sContentType = "image/jutvision"
            Case "KAR", "MID", "MIDI"
                sContentType = "audio/midi"
            Case "KSH"
                sContentType = "text/x-script.ksh"
            Case "LA"
                sContentType = "audio/x-nspaudio"
            Case "LA", "LMA"
                sContentType = "audio/nspaudio"
            Case "LAM"
                sContentType = "audio/x-liveaudio"
            Case "LATEX", "LTX"
                sContentType = "application/x-latex"
            Case "LSP"
                sContentType = "text/x-script.lisp"
            Case "LSX"
                sContentType = "text/x-la-asf"
            Case "M1V", "M2V", "MP2", "MP3", "MPA", "MPE", "MPEG", "MPG"
                sContentType = "video/mpeg"
            Case "M2A", "MP2", "MPGA"
                sContentType = "audio/mpeg"
            Case "M3U"
                sContentType = "audio/x-mpequrl"
            Case "MAN"
                sContentType = "application/x-troff-man"
            Case "MAP"
                sContentType = "application/x-navimap"
            Case "MBD"
                sContentType = "application/mbedlet"
            Case "MC$"
                sContentType = "application/x-magic-cap-package-1.0"
            Case "MCD"
                sContentType = "application/mcad"
            Case "MCF"
                sContentType = "text/mcf"
            Case "MCP"
                sContentType = "application/netmc"
            Case "ME"
                sContentType = "application/x-troff-me"
            Case "MHT", "MHTML", "MIME"
                sContentType = "message/rfc822"
            Case "MIF"
                sContentType = "application/x-frame"
            Case "MJF"
                sContentType = "audio/x-vnd.audioexplosion.mjuicemediafile"
            Case "MJPG"
                sContentType = "video/x-motion-jpeg"
            Case "MM", "MME"
                sContentType = "application/base64"
            Case "MOD"
                sContentType = "audio/mod"
            Case "MOOV", "MOV", "QT"
                sContentType = "video/quicktime"
            Case "MOVIE", "MV"
                sContentType = "video/x-sgi-movie"
            Case "MPC", "MPT", "MPV", "MPX"
                sContentType = "application/x-project"
            Case "MPP"
                sContentType = "application/vnd.ms-project"
            Case "MRC"
                sContentType = "application/marc"
            Case "MS"
                sContentType = "application/x-troff-ms"
            Case "MZZ"
                sContentType = "application/x-vnd.audioexplosion.mzz"
            Case "NAP", "NAPLPS            image/naplps"
            Case "NC"
                sContentType = "application/x-netcdf"
            Case "NCM"
                sContentType = "application/vnd.nokia.configuration-message"
            Case "NIF", "NIFF"
                sContentType = "image/x-niff"
            Case "NIX"
                sContentType = "application/x-mix-transfer"
            Case "NSC"
                sContentType = "application/x-conference"
            Case "NVD"
                sContentType = "application/x-navidoc"
            Case "ODA"
                sContentType = "application/oda"
            Case "OMC"
                sContentType = "application/x-omc"
            Case "OMCD"
                sContentType = "application/x-omcdatamaker"
            Case "OMCR"
                sContentType = "application/x-omcregerator"
            Case "P"
                sContentType = "text/x-pascal"
            Case "P10"
                sContentType = "application/pkcs10"
            Case "P12"
                sContentType = "application/pkcs-12"
            Case "P7A"
                sContentType = "application/x-pkcs7-signature"
            Case "P7C", "P7M"
                sContentType = "application/pkcs7-mime"
            Case "P7R"
                sContentType = "application/x-pkcs7-certreqresp"
            Case "P7S"
                sContentType = "application/pkcs7-signature"
            Case "PART", "PRT"
                sContentType = "application/pro_eng"
            Case "PAS"
                sContentType = "text/pascal"
            Case "PBM"
                sContentType = "image/x-portable-bitmap"
            Case "PCL"
                sContentType = "application/vnd.hp-pcl"
            Case "PCT"
                sContentType = "image/x-pict"
            Case "PCX"
                sContentType = "image/x-pcx"
            Case "PDB", "XYZ"
                sContentType = "chemical/x-pdb"
            Case "PDF"
                sContentType = "application/pdf"
            Case "PGM"
                sContentType = "image/x-portable-greymap"
            Case "PIC", "PICT"
                sContentType = "image/pict"
            Case "PKG"
                sContentType = "application/x-newton-compatible-pkg"
            Case "PKO"
                sContentType = "application/vnd.ms-pki.pko"
            Case "PLX"
                sContentType = "application/x-pixclscript"
            Case "PM"
                sContentType = "text/x-script.perl-module"
            Case "PM4", "PM5"
                sContentType = "application/x-pagemaker"
            Case "PNG", "X-PNG"
                sContentType = "image/png"
            Case "PNM"
                sContentType = "image/x-portable-anymap"
            Case "POT", "PPA", "PPS", "PPT", "PPZ", "PWZ"
                sContentType = "application/powerpoint"
            Case "POV"
                sContentType = "model/x-pov"
            Case "PPM"
                sContentType = "image/x-portable-pixmap"
            Case "PRE"
                sContentType = "application/x-freelance"
            Case "PVU"
                sContentType = "paleovu/x-pv"
            Case "PY"
                sContentType = "text/x-script.phyton"
            Case "PYC"
                sContentType = "applicaiton/x-bytecode.python"
            Case "QCP"
                sContentType = "audio/vnd.qcelp"
            Case "QIF", "QTI", "QTIF"
                sContentType = "image/x-quicktime"
            Case "QTC"
                sContentType = "video/x-qtc"
            Case "RA"
                sContentType = "audio/x-realaudio"
            Case "RA", "RAM", "RM", "RMM", "RMP"
                sContentType = "audio/x-pn-realaudio"
            Case "RAS", "RAST"
                sContentType = "image/cmu-raster"
            Case "REXX"
                sContentType = "text/x-script.rexx"
            Case "RF"
                sContentType = "image/vnd.rn-realflash"
            Case "RGB"
                sContentType = "image/x-rgb"
            Case "RMI"
                sContentType = "audio/mid"
            Case "RNG"
                sContentType = "application/ringing-tones"
            Case "RNX"
                sContentType = "application/vnd.rn-realplayer"
            Case "ROFF"
                sContentType = "application/x-troff"
            Case "RP"
                sContentType = "image/vnd.rn-realpix"
            Case "RPM"
                sContentType = "audio/x-pn-realaudio-plugin"
            Case "RT", "RTF", "RTX"
                sContentType = "text/richtext"
            Case "RV"
                sContentType = "video/vnd.rn-realvideo"
            Case "S3M"
                sContentType = "audio/s3m"
            Case "SBK"
                sContentType = "application/x-tbook"
            Case "SCM"
                sContentType = "application/x-lotusscreencam"
            Case "SDP"
                sContentType = "application/sdp"
            Case "SDR"
                sContentType = "application/sounder"
            Case "SEA"
                sContentType = "application/sea"
            Case "SET"
                sContentType = "application/set"
            Case "SGM", "SGML"
                sContentType = "text/sgml"
            Case "SH"
                sContentType = "application/x-sh"
            Case "SID"
                sContentType = "audio/x-psid"
            Case "SIT"
                sContentType = "application/x-sit"
            Case "SKD", "SKM", "SKP", "SKT"
                sContentType = "application/x-koan"
            Case "SL"
                sContentType = "application/x-seelogo"
            Case "SMI", "SMIL"
                sContentType = "application/smil"
            Case "SND"
                sContentType = "audio/basic"
            Case "SOL"
                sContentType = "application/solids"
            Case "SPC"
                sContentType = "application/x-pkcs7-certificates"
            Case "SPL"
                sContentType = "application/futuresplash"
            Case "SPR", "SPRITE            application/x-sprite"
            Case "SRC", "WSRC"
                sContentType = "application/x-wais-source"
            Case "SSI"
                sContentType = "text/x-server-parsed-html"
            Case "SSM"
                sContentType = "application/streamingmedia"
            Case "SST"
                sContentType = "application/vnd.ms-pki.certstore"
            Case "STEP", "STP"
                sContentType = "application/step"
            Case "STL"
                sContentType = "application/sla"
            Case "SV4CPIO            application/x-sv4cpio"
            Case "SV4CRC            application/x-sv4crc"
            Case "SVR"
                sContentType = "application/x-world"
            Case "SWF"
                sContentType = "application/x-shockwave-flash"
            Case "T"
                sContentType = "application/x-troff"
            Case "TALK"
                sContentType = "text/x-speech"
            Case "TAR"
                sContentType = "application/x-tar"
            Case "TBK"
                sContentType = "application/toolbook"
            Case "TCL"
                sContentType = "application/x-tcl"
            Case "TCSH"
                sContentType = "text/x-script.tcsh"
            Case "TEX"
                sContentType = "application/x-tex"
            Case "TEXI", "TEXINFO            application/x-texinfo"
            Case "TGZ"
                sContentType = "application/gnutar"
            Case "TIF", "TIFF"
                sContentType = "image/tiff"
            Case "TR"
                sContentType = "application/x-troff"
            Case "TSI"
                sContentType = "audio/tsp-audio"
            Case "TSP"
                sContentType = "audio/tsplayer"
            Case "TSV"
                sContentType = "text/tab-separated-values"
            Case "UIL"
                sContentType = "text/x-uil"
            Case "UNI", "UNIS", "URI", "URIS"
                sContentType = "text/uri-list"
            Case "UNV"
                sContentType = "application/i-deas"
            Case "USTAR"
                sContentType = "application/x-ustar"
            Case "UU", "UUE"
                sContentType = "text/x-uuencode"
            Case "VCD"
                sContentType = "application/x-cdlink"
            Case "VCS"
                sContentType = "text/x-vcalendar"
            Case "VDA"
                sContentType = "application/vda"
            Case "VDO"
                sContentType = "video/vdo"
            Case "VEW"
                sContentType = "application/groupwise"
            Case "VIV", "VIVO"
                sContentType = "video/vivo"
            Case "VMD"
                sContentType = "application/vocaltec-media-desc"
            Case "VMF"
                sContentType = "application/vocaltec-media-file"
            Case "VOC"
                sContentType = "audio/voc"
            Case "VOS"
                sContentType = "video/vosaic"
            Case "VOX"
                sContentType = "audio/voxware"
            Case "VQE", "VQL"
                sContentType = "audio/x-twinvq-plugin"
            Case "VQF"
                sContentType = "audio/x-twinvq"
            Case "VRML", "WRL", "WRZ"
                sContentType = "model/vrml"
            Case "VRT"
                sContentType = "x-world/x-vrt"
            Case "VSD", "VST", "VSW"
                sContentType = "application/x-visio"
            Case "W60"
                sContentType = "application/wordperfect6.0"
            Case "W61"
                sContentType = "application/wordperfect6.1"
            Case "WAV"
                sContentType = "audio/wav"
            Case "WAX"
                sContentType = "audio/x-ms-wax "
            Case "WB1"
                sContentType = "application/x-qpro"
            Case "WBMP"
                sContentType = "image/vnd.wap.wbmp"
            Case "WEB"
                sContentType = "application/vnd.xara"
            Case "WK1"
                sContentType = "application/x-123"
            Case "WM"
                sContentType = "video/x-ms-wm "
            Case "WMA"
                sContentType = "audio/x-ms-wma "
            Case "WMD"
                sContentType = "application/x-ms-wmd "
            Case "WMF"
                sContentType = "windows/metafile"
            Case "WML"
                sContentType = "text/vnd.wap.wml"
            Case "WMLC"
                sContentType = "application/vnd.wap.wmlc"
            Case "WMLS"
                sContentType = "text/vnd.wap.wmlscript"
            Case "WMLSC"
                sContentType = "application/vnd.wap.wmlscriptc"
            Case "WMV"
                sContentType = "video/x-ms-wmv "
            Case "WMX"
                sContentType = "video/x-ms-wmx "
            Case "WMZ"
                sContentType = "application/x-ms-wmz "
            Case "WP", "WP5", "WP6", "WPD"
                sContentType = "application/wordperfect"
            Case "WQ1"
                sContentType = "application/x-lotus"
            Case "WRI"
                sContentType = "application/mswrite"
            Case "WSC"
                sContentType = "text/scriplet"
            Case "WTK"
                sContentType = "application/x-wintalk"
            Case "WVX"
                sContentType = "video/x-ms-wvx "
            Case "XBM", "XPM"
                sContentType = "image/xpm"
            Case "XDR"
                sContentType = "video/x-amt-demorun"
            Case "XGZ"
                sContentType = "xgl/drawing"
            Case "XIF"
                sContentType = "image/vnd.xiff"
            Case "XL", "XLA", "XLB", "XLC", "XLD", "XLK", "XLL", "XLM", "XLS", "XLT", "XLV", "XLW"
                sContentType = "application/excel"
            Case "XM"
                sContentType = "audio/xm"
            Case "XML"
                sContentType = "application/xml"
            Case "XMZ"
                sContentType = "xgl/movie"
            Case "XPIX"
                sContentType = "application/x-vnd.ls-xpix"
            Case "XSR"
                sContentType = "video/x-amt-showrun"
            Case "XWD"
                sContentType = "image/x-xwd"
            Case "Z"
                sContentType = "application/x-compressed"
            Case "ZIP"
                sContentType = "application/zip"
            Case "ZSH"
                sContentType = "text/x-script.zsh"
            Case Else
                sContentType = "application/octet-stream"
        End Select

        If Left(sContentType, InStr(1, sContentType, "/", vbTextCompare) - 1) Then
            lStreamType = adTypeText
        Else
            lStreamType = adTypeBinary
        End If

        Response.ContentType = sContentType

        '   open a stream
        Set objStream = Server.CreateObject("ADODB.Stream")
        objStream.Open

        '   set type
        objStream.Type = lStreamType
<snip>
(assuption: variables DIMed, adType-constants defined)
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LVL 7

Expert Comment

by:Hecatonchires
ID: 16978484
That'd... pretty much do it.  Maybe encapsulise it in a function so that your code is neater.

The windows filesystem doesn't seem to keep a real mime-type, just extensions. - its very 'bolted on' the side.  (Unlike the old mac and beos fs's)
0
 
LVL 7

Expert Comment

by:Hecatonchires
ID: 16978485
and i should have done the right in the first comment better...
0
 

Author Comment

by:WebJoe
ID: 16978851
Too bad, but thanks for you effort
0

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