001    package railo.commons.net.http;
002    
003    import java.io.IOException;
004    import java.io.InputStream;
005    
006    import railo.print;
007    import railo.commons.io.IOUtil;
008    import railo.commons.io.res.ContentType;
009    import railo.commons.io.res.ContentTypeImpl;
010    import railo.commons.lang.StringUtil;
011    import railo.commons.net.HTTPUtil;
012    import railo.runtime.PageContext;
013    import railo.runtime.engine.ThreadLocalPageContext;
014    import railo.runtime.op.Caster;
015    
016    public abstract class HTTPResponseSupport implements HTTPResponse {
017            
018    
019    
020            @Override
021            public final long getContentLength() throws IOException {
022                    Header ct = getLastHeaderIgnoreCase("Content-Length");
023                    if(ct!=null) return Caster.toLongValue(ct.getValue(),-1);
024                    
025                    InputStream is=null;
026                    long length=0;
027                    try{
028                            is=getContentAsStream();
029    
030                if ( is == null )
031                    return 0;
032    
033                            byte[] buffer = new byte[1024];
034                        int len;
035                        while((len = is.read(buffer)) !=-1){
036                          length+=len;
037                        }
038                            return length;
039                    }
040                    finally {
041                            IOUtil.closeEL(is);
042                    }
043            }
044    
045            @Override
046            public final ContentType getContentType() {
047                    Header header = getLastHeaderIgnoreCase("Content-Type");
048                    if(header==null) return null;
049                    
050                    String[] mimeCharset = HTTPUtil.splitMimeTypeAndCharset(header.getValue(), null);
051                    if(mimeCharset==null) return null;
052                    
053                    String[] typeSub = HTTPUtil.splitTypeAndSubType(mimeCharset[0]);
054                    return new ContentTypeImpl(typeSub[0],typeSub[1],mimeCharset[1]);
055            }
056    
057            @Override
058            public final String getCharset() {
059                    ContentType ct = getContentType();
060                    String charset=null;
061                    if(ct!=null)charset=ct.getCharset();
062                    if(!StringUtil.isEmpty(charset)) return charset;
063                    
064                    PageContext pc = ThreadLocalPageContext.get();
065                    if(pc!=null) return pc.getConfig().getWebCharset();
066                    return "ISO-8859-1";
067            }
068    
069    }