From d0293d535a9c6d96da425ea22965284e9a8c2aa6 Mon Sep 17 00:00:00 2001 From: Nader Farahani Date: Sun, 8 Feb 2015 22:19:03 +0000 Subject: [PATCH] Handling invalid file data, for example text files, by retruning error flags as part of the data object passed to the callbackFn of loadImage.parseMetaData so that invalid files can be easily detected and handled. --- js/load-image-meta.js | 3 ++- js/load-image.all.min.js | 2 +- test/test.js | 18 ++++++++++++++++++ 3 files changed, 21 insertions(+), 2 deletions(-) diff --git a/js/load-image-meta.js b/js/load-image-meta.js index d808508..65f22ad 100644 --- a/js/load-image-meta.js +++ b/js/load-image-meta.js @@ -130,7 +130,8 @@ } } } else { - console.log('Invalid JPEG file: Missing JPEG marker.'); + data.error = true; + data.error_msg = 'Invalid JPEG file: Missing JPEG marker.'; } callback(data); }, diff --git a/js/load-image.all.min.js b/js/load-image.all.min.js index befe38a..d5f0a2f 100644 --- a/js/load-image.all.min.js +++ 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program",3:"Aperture priority",4:"Shutter priority",5:"Creative program",6:"Action program",7:"Portrait mode",8:"Landscape mode"},MeteringMode:{0:"Unknown",1:"Average",2:"CenterWeightedAverage",3:"Spot",4:"MultiSpot",5:"Pattern",6:"Partial",255:"Other"},LightSource:{0:"Unknown",1:"Daylight",2:"Fluorescent",3:"Tungsten (incandescent light)",4:"Flash",9:"Fine weather",10:"Cloudy weather",11:"Shade",12:"Daylight fluorescent (D 5700 - 7100K)",13:"Day white fluorescent (N 4600 - 5400K)",14:"Cool white fluorescent (W 3900 - 4500K)",15:"White fluorescent (WW 3200 - 3700K)",17:"Standard light A",18:"Standard light B",19:"Standard light C",20:"D55",21:"D65",22:"D75",23:"D50",24:"ISO studio tungsten",255:"Other"},Flash:{0:"Flash did not fire",1:"Flash fired",5:"Strobe return light not detected",7:"Strobe return light detected",9:"Flash fired, compulsory flash mode",13:"Flash fired, compulsory flash mode, return light not detected",15:"Flash fired, compulsory flash mode, return light 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b=this.get(a);switch(a){case"LightSource":case"Flash":case"MeteringMode":case"ExposureProgram":case"SensingMethod":case"SceneCaptureType":case"SceneType":case"CustomRendered":case"WhiteBalance":case"GainControl":case"Contrast":case"Saturation":case"Sharpness":case"SubjectDistanceRange":case"FileSource":case"Orientation":return this.stringValues[a][b];case"ExifVersion":case"FlashpixVersion":return String.fromCharCode(b[0],b[1],b[2],b[3]);case"ComponentsConfiguration":return this.stringValues[a][b[0]]+this.stringValues[a][b[1]]+this.stringValues[a][b[2]]+this.stringValues[a][b[3]];case"GPSVersionID":return b[0]+"."+b[1]+"."+b[2]+"."+b[3]}return String(b)},function(a){var b,c=a.tags,d=a.map;for(b in c)c.hasOwnProperty(b)&&(d[c[b]]=b)}(a.ExifMap.prototype),a.ExifMap.prototype.getAll=function(){var a,b,c={};for(a in this)this.hasOwnProperty(a)&&(b=this.tags[a],b&&(c[b]=this.getText(b)));return c}}); \ No newline at end of file +!function(a){"use strict";var b=function(a,c,d){var 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a.width*a.height>1048576?(b=document.createElement("canvas"),b.width=b.height=1,c=b.getContext("2d"),c.drawImage(a,-a.width+1,0),0===c.getImageData(0,0,1,1).data[3]):!1},a.detectVerticalSquash=function(a,b){var c,d,e,f,g,h=a.naturalHeight||a.height,i=document.createElement("canvas"),j=i.getContext("2d");for(b&&(h/=2),i.width=1,i.height=h,j.drawImage(a,0,0),c=j.getImageData(0,0,1,h).data,d=0,e=h,f=h;f>d;)g=c[4*(f-1)+3],0===g?e=f:d=f,f=e+d>>1;return f/h||1},a.renderImageToCanvas=function(c,d,e,f,g,h,i,j,k,l){if("image/jpeg"===d._type){var m,n,o,p,q=c.getContext("2d"),r=document.createElement("canvas"),s=1024,t=r.getContext("2d");if(r.width=s,r.height=s,q.save(),m=a.detectSubsampling(d),m&&(e/=2,f/=2,g/=2,h/=2),n=a.detectVerticalSquash(d,m),m||1!==n){for(f*=n,k=Math.ceil(s*k/g),l=Math.ceil(s*l/h/n),j=0,p=0;h>p;){for(i=0,o=0;g>o;)t.clearRect(0,0,s,s),t.drawImage(d,e,f,g,h,-o,-p,g,h),q.drawImage(r,0,0,s,s,i,j,k,l),o+=s,i+=k;p+=s,j+=l}return q.restore(),c}}return b(c,d,e,f,g,h,i,j,k,l)}}}),function(a){"use strict";"function"==typeof define&&define.amd?define(["load-image"],a):a(window.loadImage)}(function(a){"use strict";var b=a.hasCanvasOption,c=a.transformCoordinates,d=a.getTransformedOptions;a.hasCanvasOption=function(c){return b.call(a,c)||c.orientation},a.transformCoordinates=function(b,d){c.call(a,b,d);var e=b.getContext("2d"),f=b.width,g=b.height,h=d.orientation;if(h&&!(h>8))switch(h>4&&(b.width=g,b.height=f),h){case 2:e.translate(f,0),e.scale(-1,1);break;case 3:e.translate(f,g),e.rotate(Math.PI);break;case 4:e.translate(0,g),e.scale(1,-1);break;case 5:e.rotate(.5*Math.PI),e.scale(1,-1);break;case 6:e.rotate(.5*Math.PI),e.translate(0,-g);break;case 7:e.rotate(.5*Math.PI),e.translate(f,-g),e.scale(-1,1);break;case 8:e.rotate(-.5*Math.PI),e.translate(-f,0)}},a.getTransformedOptions=function(b,c){var e,f,g=d.call(a,b,c),h=g.orientation;if(!h||h>8||1===h)return g;e={};for(f in g)g.hasOwnProperty(f)&&(e[f]=g[f]);switch(g.orientation){case 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a.apply(this,arguments)},a.metaDataParsers={jpeg:{65505:[]}},a.parseMetaData=function(b,c,d){d=d||{};var e=this,f=d.maxMetaDataSize||262144,g={},h=!(window.DataView&&b&&b.size>=12&&"image/jpeg"===b.type&&a.blobSlice);(h||!a.readFile(a.blobSlice.call(b,0,f),function(b){if(b.target.error)return console.log(b.target.error),void c(g);var f,h,i,j,k=b.target.result,l=new DataView(k),m=2,n=l.byteLength-4,o=m;if(65496===l.getUint16(0)){for(;n>m&&(f=l.getUint16(m),f>=65504&&65519>=f||65534===f);){if(h=l.getUint16(m+2)+2,m+h>l.byteLength){console.log("Invalid meta data: Invalid segment size.");break}if(i=a.metaDataParsers.jpeg[f])for(j=0;j6&&(g.imageHead=k.slice?k.slice(0,o):new Uint8Array(k).subarray(0,o))}else g.error=!0,g.error_msg="Invalid JPEG file: Missing JPEG marker.";c(g)},"readAsArrayBuffer"))&&c(g)}}),function(a){"use strict";"function"==typeof define&&define.amd?define(["load-image","load-image-meta"],a):a(window.loadImage)}(function(a){"use strict";a.ExifMap=function(){return this},a.ExifMap.prototype.map={Orientation:274},a.ExifMap.prototype.get=function(a){return this[a]||this[this.map[a]]},a.getExifThumbnail=function(a,b,c){var d,e,f;if(!c||b+c>a.byteLength)return void console.log("Invalid Exif data: Invalid thumbnail data.");for(d=[],e=0;c>e;e+=1)f=a.getUint8(b+e),d.push((16>f?"0":"")+f.toString(16));return"data:image/jpeg,%"+d.join("%")},a.exifTagTypes={1:{getValue:function(a,b){return a.getUint8(b)},size:1},2:{getValue:function(a,b){return String.fromCharCode(a.getUint8(b))},size:1,ascii:!0},3:{getValue:function(a,b,c){return a.getUint16(b,c)},size:2},4:{getValue:function(a,b,c){return a.getUint32(b,c)},size:4},5:{getValue:function(a,b,c){return a.getUint32(b,c)/a.getUint32(b+4,c)},size:8},9:{getValue:function(a,b,c){return a.getInt32(b,c)},size:4},10:{getValue:function(a,b,c){return a.getInt32(b,c)/a.getInt32(b+4,c)},size:8}},a.exifTagTypes[7]=a.exifTagTypes[1],a.getExifValue=function(b,c,d,e,f,g){var h,i,j,k,l,m,n=a.exifTagTypes[e];if(!n)return void console.log("Invalid Exif data: Invalid tag type.");if(h=n.size*f,i=h>4?c+b.getUint32(d+8,g):d+8,i+h>b.byteLength)return void console.log("Invalid Exif data: Invalid data offset.");if(1===f)return n.getValue(b,i,g);for(j=[],k=0;f>k;k+=1)j[k]=n.getValue(b,i+k*n.size,g);if(n.ascii){for(l="",k=0;ka.byteLength)return void console.log("Invalid Exif data: Invalid directory offset.");if(f=a.getUint16(c,d),g=c+2+12*f,g+4>a.byteLength)return void console.log("Invalid Exif data: Invalid directory size.");for(h=0;f>h;h+=1)this.parseExifTag(a,b,c+2+12*h,d,e);return a.getUint32(g,d)},a.parseExifData=function(b,c,d,e,f){if(!f.disableExif){var g,h,i,j=c+10;if(1165519206===b.getUint32(c+4)){if(j+8>b.byteLength)return void console.log("Invalid Exif data: Invalid segment size.");if(0!==b.getUint16(c+8))return void console.log("Invalid Exif data: Missing byte alignment offset.");switch(b.getUint16(j)){case 18761:g=!0;break;case 19789:g=!1;break;default:return void console.log("Invalid Exif data: Invalid byte alignment marker.")}if(42!==b.getUint16(j+2,g))return void console.log("Invalid Exif data: Missing TIFF marker.");h=b.getUint32(j+4,g),e.exif=new a.ExifMap,h=a.parseExifTags(b,j,j+h,g,e),h&&!f.disableExifThumbnail&&(i={exif:{}},h=a.parseExifTags(b,j,j+h,g,i),i.exif[513]&&(e.exif.Thumbnail=a.getExifThumbnail(b,j+i.exif[513],i.exif[514]))),e.exif[34665]&&!f.disableExifSub&&a.parseExifTags(b,j,j+e.exif[34665],g,e),e.exif[34853]&&!f.disableExifGps&&a.parseExifTags(b,j,j+e.exif[34853],g,e)}}},a.metaDataParsers.jpeg[65505].push(a.parseExifData)}),function(a){"use strict";"function"==typeof define&&define.amd?define(["load-image","load-image-exif"],a):a(window.loadImage)}(function(a){"use strict";a.ExifMap.prototype.tags={256:"ImageWidth",257:"ImageHeight",34665:"ExifIFDPointer",34853:"GPSInfoIFDPointer",40965:"InteroperabilityIFDPointer",258:"BitsPerSample",259:"Compression",262:"PhotometricInterpretation",274:"Orientation",277:"SamplesPerPixel",284:"PlanarConfiguration",530:"YCbCrSubSampling",531:"YCbCrPositioning",282:"XResolution",283:"YResolution",296:"ResolutionUnit",273:"StripOffsets",278:"RowsPerStrip",279:"StripByteCounts",513:"JPEGInterchangeFormat",514:"JPEGInterchangeFormatLength",301:"TransferFunction",318:"WhitePoint",319:"PrimaryChromaticities",529:"YCbCrCoefficients",532:"ReferenceBlackWhite",306:"DateTime",270:"ImageDescription",271:"Make",272:"Model",305:"Software",315:"Artist",33432:"Copyright",36864:"ExifVersion",40960:"FlashpixVersion",40961:"ColorSpace",40962:"PixelXDimension",40963:"PixelYDimension",42240:"Gamma",37121:"ComponentsConfiguration",37122:"CompressedBitsPerPixel",37500:"MakerNote",37510:"UserComment",40964:"RelatedSoundFile",36867:"DateTimeOriginal",36868:"DateTimeDigitized",37520:"SubSecTime",37521:"SubSecTimeOriginal",37522:"SubSecTimeDigitized",33434:"ExposureTime",33437:"FNumber",34850:"ExposureProgram",34852:"SpectralSensitivity",34855:"PhotographicSensitivity",34856:"OECF",34864:"SensitivityType",34865:"StandardOutputSensitivity",34866:"RecommendedExposureIndex",34867:"ISOSpeed",34868:"ISOSpeedLatitudeyyy",34869:"ISOSpeedLatitudezzz",37377:"ShutterSpeedValue",37378:"ApertureValue",37379:"BrightnessValue",37380:"ExposureBias",37381:"MaxApertureValue",37382:"SubjectDistance",37383:"MeteringMode",37384:"LightSource",37385:"Flash",37396:"SubjectArea",37386:"FocalLength",41483:"FlashEnergy",41484:"SpatialFrequencyResponse",41486:"FocalPlaneXResolution",41487:"FocalPlaneYResolution",41488:"FocalPlaneResolutionUnit",41492:"SubjectLocation",41493:"ExposureIndex",41495:"SensingMethod",41728:"FileSource",41729:"SceneType",41730:"CFAPattern",41985:"CustomRendered",41986:"ExposureMode",41987:"WhiteBalance",41988:"DigitalZoomRatio",41989:"FocalLengthIn35mmFilm",41990:"SceneCaptureType",41991:"GainControl",41992:"Contrast",41993:"Saturation",41994:"Sharpness",41995:"DeviceSettingDescription",41996:"SubjectDistanceRange",42016:"ImageUniqueID",42032:"CameraOwnerName",42033:"BodySerialNumber",42034:"LensSpecification",42035:"LensMake",42036:"LensModel",42037:"LensSerialNumber",0:"GPSVersionID",1:"GPSLatitudeRef",2:"GPSLatitude",3:"GPSLongitudeRef",4:"GPSLongitude",5:"GPSAltitudeRef",6:"GPSAltitude",7:"GPSTimeStamp",8:"GPSSatellites",9:"GPSStatus",10:"GPSMeasureMode",11:"GPSDOP",12:"GPSSpeedRef",13:"GPSSpeed",14:"GPSTrackRef",15:"GPSTrack",16:"GPSImgDirectionRef",17:"GPSImgDirection",18:"GPSMapDatum",19:"GPSDestLatitudeRef",20:"GPSDestLatitude",21:"GPSDestLongitudeRef",22:"GPSDestLongitude",23:"GPSDestBearingRef",24:"GPSDestBearing",25:"GPSDestDistanceRef",26:"GPSDestDistance",27:"GPSProcessingMethod",28:"GPSAreaInformation",29:"GPSDateStamp",30:"GPSDifferential",31:"GPSHPositioningError"},a.ExifMap.prototype.stringValues={ExposureProgram:{0:"Undefined",1:"Manual",2:"Normal program",3:"Aperture priority",4:"Shutter priority",5:"Creative program",6:"Action program",7:"Portrait mode",8:"Landscape mode"},MeteringMode:{0:"Unknown",1:"Average",2:"CenterWeightedAverage",3:"Spot",4:"MultiSpot",5:"Pattern",6:"Partial",255:"Other"},LightSource:{0:"Unknown",1:"Daylight",2:"Fluorescent",3:"Tungsten (incandescent light)",4:"Flash",9:"Fine weather",10:"Cloudy weather",11:"Shade",12:"Daylight fluorescent (D 5700 - 7100K)",13:"Day white fluorescent (N 4600 - 5400K)",14:"Cool white fluorescent (W 3900 - 4500K)",15:"White fluorescent (WW 3200 - 3700K)",17:"Standard light A",18:"Standard light B",19:"Standard light C",20:"D55",21:"D65",22:"D75",23:"D50",24:"ISO studio tungsten",255:"Other"},Flash:{0:"Flash did not fire",1:"Flash fired",5:"Strobe return light not detected",7:"Strobe return light detected",9:"Flash fired, compulsory flash mode",13:"Flash fired, compulsory flash mode, return light not detected",15:"Flash fired, compulsory flash mode, return light detected",16:"Flash did not fire, compulsory flash mode",24:"Flash did not fire, auto mode",25:"Flash fired, auto mode",29:"Flash fired, auto mode, return light not detected",31:"Flash fired, auto mode, return light detected",32:"No flash function",65:"Flash fired, red-eye reduction mode",69:"Flash fired, red-eye reduction mode, return light not detected",71:"Flash fired, red-eye reduction mode, return light detected",73:"Flash fired, compulsory flash mode, red-eye reduction mode",77:"Flash fired, compulsory flash mode, red-eye reduction mode, return light not detected",79:"Flash fired, compulsory flash mode, red-eye reduction mode, return light detected",89:"Flash fired, auto mode, red-eye reduction mode",93:"Flash fired, auto mode, return light not detected, red-eye reduction mode",95:"Flash fired, auto mode, return light detected, red-eye reduction mode"},SensingMethod:{1:"Undefined",2:"One-chip color area sensor",3:"Two-chip color area sensor",4:"Three-chip color area sensor",5:"Color sequential area sensor",7:"Trilinear sensor",8:"Color sequential linear sensor"},SceneCaptureType:{0:"Standard",1:"Landscape",2:"Portrait",3:"Night scene"},SceneType:{1:"Directly photographed"},CustomRendered:{0:"Normal process",1:"Custom process"},WhiteBalance:{0:"Auto white balance",1:"Manual white balance"},GainControl:{0:"None",1:"Low gain up",2:"High gain up",3:"Low gain down",4:"High gain down"},Contrast:{0:"Normal",1:"Soft",2:"Hard"},Saturation:{0:"Normal",1:"Low saturation",2:"High saturation"},Sharpness:{0:"Normal",1:"Soft",2:"Hard"},SubjectDistanceRange:{0:"Unknown",1:"Macro",2:"Close view",3:"Distant view"},FileSource:{3:"DSC"},ComponentsConfiguration:{0:"",1:"Y",2:"Cb",3:"Cr",4:"R",5:"G",6:"B"},Orientation:{1:"top-left",2:"top-right",3:"bottom-right",4:"bottom-left",5:"left-top",6:"right-top",7:"right-bottom",8:"left-bottom"}},a.ExifMap.prototype.getText=function(a){var b=this.get(a);switch(a){case"LightSource":case"Flash":case"MeteringMode":case"ExposureProgram":case"SensingMethod":case"SceneCaptureType":case"SceneType":case"CustomRendered":case"WhiteBalance":case"GainControl":case"Contrast":case"Saturation":case"Sharpness":case"SubjectDistanceRange":case"FileSource":case"Orientation":return this.stringValues[a][b];case"ExifVersion":case"FlashpixVersion":return String.fromCharCode(b[0],b[1],b[2],b[3]);case"ComponentsConfiguration":return this.stringValues[a][b[0]]+this.stringValues[a][b[1]]+this.stringValues[a][b[2]]+this.stringValues[a][b[3]];case"GPSVersionID":return b[0]+"."+b[1]+"."+b[2]+"."+b[3]}return String(b)},function(a){var b,c=a.tags,d=a.map;for(b in c)c.hasOwnProperty(b)&&(d[c[b]]=b)}(a.ExifMap.prototype),a.ExifMap.prototype.getAll=function(){var a,b,c={};for(a in this)this.hasOwnProperty(a)&&(b=this.tags[a],b&&(c[b]=this.getText(b)));return c}}); \ No newline at end of file diff --git a/test/test.js b/test/test.js index f26fc36..b9caf0e 100644 --- a/test/test.js +++ b/test/test.js @@ -40,8 +40,11 @@ 'hpanN0dXZ3eHl6goOEhYaHiImKkpOUlZaXmJmaoqOkpaanqKmq' + 'srO0tba3uLm6wsPExcbHyMnK0tPU1dbX2Nna4uPk5ebn6Onq8v' + 'P09fb3+Pn6/9oADAMBAAIRAxEAPwD+/iiiigD/2Q==', + b64DataTXT = 'VGhpcyBpcyBhIHNhbXBsZSB0ZXh0IGZpbGUu', imageUrlJPEG = 'data:image/jpeg;base64,' + b64DataJPEG, + imageUrlJPEGBad = 'data:image/jpeg;base64,' + b64DataTXT, blobJPEG = canCreateBlob && window.dataURLtoBlob(imageUrlJPEG), + blobJPEGBad = canCreateBlob && window.dataURLtoBlob(imageUrlJPEGBad), createBlob = function (data, type) { try { return new Blob([data], {type: type}); @@ -453,6 +456,21 @@ }); }); + it('Should set error information if invalid JPG data', function (done) { + loadImage.parseMetaData(blobJPEGBad, function (data) { + expect(data.error).to.be(true); + expect(data.error_msg).to.be('Invalid JPEG file: Missing JPEG marker.'); + done(); + }); + }); + + it('Should NOT set error information if valid JPG data', function (done) { + loadImage.parseMetaData(blobJPEG, function (data) { + expect(data.error).to.not.be(true); + expect(data.error_msg).to.not.be('Invalid JPEG file: Missing JPEG marker.'); + done(); + }); + }); }); }(