Question

我正在使用Android上的Web服务器而我无法将二进制文件发送到浏览器。提前致谢

如何将二进制数据发送到浏览器。请使用outputstream和inputstream来做。

Socket soc=server.accept();
BufferedReader buff=new BufferedReader(new InputStreamReader(soc.getInputStream()));

try{
    String req=buff.readLine().replace(" HTTP/1.0","").replace(" HTTP/1.1","").replace("GET ","");
//setTitle(req);
//buff.close();
File f=new File(homedir+req);
if(f.isDirectory()){
    File f2=new File(homedir+req+"/index.html");
    File f3=new File(homedir+req+"/INDEX.html");
    if(f2.exists()||f3.exists()){
        try{
        OutputStream out=soc.getOutputStream();
        PrintWriter pw=new PrintWriter(out);
        pw.print("HTTP/1.0 200 OK\n\rContent-type: text/html\n\r\n\r");
        pw.flush();
        //pw.close();
        FileInputStream inst=new FileInputStream(f2);
        copyStream(inst,out);
        out.close();
        pw.close();
        }catch(Exception k){
            OutputStream out=soc.getOutputStream();
            PrintWriter pw=new PrintWriter(out);
            pw.print("HTTP/1.0 200 OK\n\rContent-type: text/html\n\r\n\r");
            pw.flush();
            //pw.close();
            FileInputStream inst=new FileInputStream(f3);
            copyStream(inst,out);
            inst.close();
            out.close();
            pw.close();
        }
    }else
    throw new Exception("file not found");
}else{
OutputStream out=soc.getOutputStream();
    PrintWriter pw=new PrintWriter(out);
    String mim="";
    try{
        mim=MimeTypeMap.getSingleton().getMimeTypeFromExtension(f.getName().substring(f.getName().lastIndexOf(".")+1));
    }catch(Exception k){
        mim="text/html";
    }
    if(mim.isEmpty()){
        mim="text/html";
    }
    pw.print("HTTP/1.0 200 OK\n\rContent-type: "+mim+"\n\r\n\r");
    pw.flush();
    //pw.close();
    FileInputStream inst=new FileInputStream(f);
    copyStream(inst,out);
    inst.close();
    out.close();
    pw.close();
    }
}catch(Exception k){
    PrintWriter pw=new PrintWriter(soc.getOutputStream());
    pw.print("<html><h1>"+k.getMessage()+"</h1></html>");
    pw.flush();
    pw.close();
}
buff.close();
soc.close();

调用此选项时，浏览器显示以下内容：

OutputStream out=soc.getOutputStream();
PrintWriter pw=new PrintWriter(out);
String mim="";
try{
               mim=MimeTypeMap.getSingleton().getMimeTypeFromExtension(f.getName().substring(f.getName().lastIndexOf(".")+1));
}catch(Exception k){
    mim="text/html";
}
if(mim.isEmpty()){
    mim="text/html";
}
pw.print("HTTP/1.0 200 OK\n\rContent-type: "+mim+"\n\r\n\r");
pw.flush();
//pw.close();
FileInputStream inst=new FileInputStream(f);
copyStream(inst,out);
inst.close();
out.close();
pw.close();

以下是浏览器显示的内容：

What the browser shows

Answer 1

在此处更改：

String mim="image/"

try{
               mim += MimeTypeMap.getSingleton().getMimeTypeFromExtension(f.getName().substring(f.getName().lastIndexOf(".")+1));

此代码为图片设置了正确的内容类型，如：

image/jpg
image/jpeg
image/png

将图像发送到浏览器客户端

1 个答案: