如何用ASP获取远程图片的高度
在页面中指定了宽度，如何用ASP获取远程图片的高度
比如：http://www.hdsjw.com/uploadfiles/200711299623757.jpg
<img src="http://www.hdsjw.com/uploadfiles/200711299623757.jpg" style="width: 313px; height: ？？？px;">
[解决办法]
Class imgInfo dim aso Private Sub Class_Initialize set aso=CreateObject("Adodb.Stream") aso.Mode=3 aso.Type=1 aso.Open End Sub Private Sub Class_Terminate err.clear set aso=nothingEnd SubPrivate Function Bin2Str(Bin)Dim I, StrFor I=1 to LenB(Bin)clow=MidB(Bin,I,1)If ASCB(clow)<128 ThenStr = Str & Chr(ASCB(clow))elseI=I+1If I <= LenB(Bin) Then Str = Str & Chr(ASCW(MidB(Bin,I,1)&clow))End IfNextBin2Str = StrEnd FunctionPrivate Function Num2Str(num,base,lens)dim retret = ""while(num>=base)ret = (num mod base) & retnum = (num - num mod base)/basewendNum2Str = right(string(lens,"0") & num & ret,lens)End FunctionPrivate Function Str2Num(str,base) dim ret ret = 0 for i=1 to len(str) ret = ret *base + cint(mid(str,i,1)) next Str2Num=retEnd FunctionPrivate Function BinVal(bin)dim retret = 0for i = lenb(bin) to 1 step -1ret = ret *256 + ascb(midb(bin,i,1))nextBinVal=retEnd FunctionPrivate Function BinVal2(bin)dim retret = 0for i = 1 to lenb(bin)ret = ret *256 + ascb(midb(bin,i,1))nextBinVal2=retEnd FunctionPrivate Function getImageSize(filespec,filefrom)dim ret(3)select case filefrom case 1 '1为同域文件，否则为异域文件 aso.LoadFromFile(filespec) case 2 ASO.Write filespec ASO.Position = 0end selectbFlag=ASO.Read(3)select case hex(binVal(bFlag))case "4E5089":aso.read(15)ret(0)="PNG"ret(1)=BinVal2(aso.read(2))aso.read(2)ret(2)=BinVal2(aso.read(2))case "464947":aso.read(3)ret(0)="GIF"ret(1)=BinVal(aso.read(2))ret(2)=BinVal(aso.read(2))case "535746":aso.read(5)binData=aso.Read(1)sConv=Num2Str(ascb(binData),2 ,8)nBits=Str2Num(left(sConv,5),2)sConv=mid(sConv,6)while(len(sConv)<nBits*4)binData=aso.Read(1)sConv=sConv&Num2Str(ascb(binData),2 ,8)wendret(0)="SWF"ret(1)=int(abs(Str2Num(mid(sConv,1*nBits+1,nBits),2)-Str2Num(mid(sConv,0*nBits+1,nBits),2))/20)ret(2)=int(abs(Str2Num(mid(sConv,3*nBits+1,nBits),2)-Str2Num(mid(sConv,2*nBits+1,nBits),2))/20)case "FFD8FF":dodo: p1=binVal(aso.Read(1)): loop while p1=255 and not aso.EOSIf p1>191 and p1<196 Then exit do else aso.read(binval2(aso.Read(2))-2)do:p1=binVal(aso.Read(1)):loop while p1<255 and not aso.EOSloop while trueaso.Read(3)ret(0)="JPG"ret(2)=binval2(aso.Read(2))ret(1)=binval2(aso.Read(2))case else:If left(Bin2Str(bFlag),2)="BM" Thenaso.Read(15)ret(0)="BMP"ret(1)=binval(aso.Read(4))ret(2)=binval(aso.Read(4))elseret(0)=""End Ifend selectret(3)="width=""" & ret(1) &""" height=""" & ret(2) &""""getimagesize=retEnd FunctionPublic Function imgW(pic_path,filefrom) '参数filefrom是判断文件是远程http开头的还是本地的 '1为本地，2为远程 select case filefrom case 1 Set fso1 = server.CreateObject("Scripting.FileSystemObject") If (fso1.FileExists(pic_path)) Then Set f1 = fso1.GetFile(pic_path) ext=fso1.GetExtensionName(pic_path) select case ext case "gif","bmp","jpg","png": arr=getImageSize(f1.path,1) imgW = arr(1) end select Set f1=nothing else imgW = 0 End If Set fso1=nothing case 2 Arr=GetImageSize(pic_path,2) imgW = Arr(1) end selectEnd FunctionPublic Function imgH(pic_path,filefrom) select case filefrom case 1 Set fso1 = server.CreateObject("Scripting.FileSystemObject") If (fso1.FileExists(pic_path)) Then Set f1 = fso1.GetFile(pic_path) ext=fso1.GetExtensionName(pic_path) select case ext case "gif","bmp","jpg","png": arr=getImageSize(f1.path,1) imgH = arr(2) end select Set f1=nothing else imgH = 0 End If Set fso1=nothing case 2 Arr=getImageSize(pic_path,2) imgH = Arr(2) end selectEnd FunctionEnd Class'可以用于读取远程图片信息的类Class Class_Http Private ArrProgId,Prog,Flag,strXmlHttp Private Sub Class_Initialize On Error Resume Next ArrProgId = Array("MSXML2.ServerXMLHTTP.4.0", "MSXML2.ServerXMLHTTP.3.0", "MSXML2.ServerXMLHTTP", "MSXML2.XMLHTTP.5.0", "MSXML2.XMLHTTP.4.0", "MSXML2.XMLHTTP.3.0", "MSXML2.XMLHTTP","Microsoft.XMLHTTP") For Each Prog In ArrProgId If (IsObjInstalled(Prog) = true) Then strXmlHttp = Prog Exit For End If Next End Sub Public Function IsObjInstalled(strClassString) On Error Resume Next IsObjInstalled = False Err = 0 Dim xTestObj Set xTestObj = Server.createObject(strClassString) If 0 = Err Then IsObjInstalled = True Set xTestObj = Nothing Err = 0 End Function Public Function GetHttpPage(URL) Dim xmlHttp If URL = "" Or Len(URL)<18 Or URL = "$False$" Then GetHttpPage = "$False$" Exit Function End If Set xmlHttp = Server.CreateObject(strXmlHttp) With xmlHttp .SetTimeouts 10000, 10000, 10000, 10000 .Open "GET", URL, False .Send() End With If xmlHttp.Readystate<>4 Then Set xmlHttp = Nothing GetHttpPage = "$False$" Exit Function End If GetHTTPPage = xmlHttp.responseBody Set xmlHttp = Nothing End FunctionEnd Class Set objHttp = New Class_Http Set objImage = New ImgInfo binBody = objHttp.GetHttpPage(img_file) 'response.write lenb(binbody) img_W = objImage.imgW(binBody,2) '取得图片宽度 img_H = objImage.imgH(binBody,2) '取得图片高度 Set objImage = Nothing Set objHttp = Nothing