Read the content of a file (via socket)

Question

Hi,
I need to read the content of a file (.txt, or better, .jpg) and to write it again in another file.
I have this code (in Javascript):
    conn = new Socket;
    conn.encoding = "BINARY";
    if (conn.open ("127.0.0.1:8888")) {
    conn.timeout=30;
    conn.writeln("GET variousFiles/file.jpg HTTP/1.1");
    reply = conn.read(999999);
    conn.close();
    var file = new File("C:/APPS/New_File.txt");
    file.encoding = 'BINARY';
    var open_file = file.open("w+");
    file.write(reply);
    } else { alert("Errore: " + conn2.error); }
However my new file is always empty, because I can not read the content of the first file.
My variable "reply" is always empty.
Thanks and best regards.

Answer 1

There is a particular case with sugested function, if content is generated on the fly by the server -php, cgi, etc.-
In this case, http server doesn´t knows total size of response data, so response shows a chunked transfer-encoding header and data is parted in chunks, each one starting with it´s size, and following the data.
HTTP/1.1 200 OK
Date: Tue, 30 Apr 2013 12:43:41 GMT
Server: Apache/1.3.31 (Win32) mod_fastcgi/2.4.1
Connection: close
Transfer-Encoding: chunked
Content-Type: image/jpeg
f49
ÿØÿà  JFIF
I´m using this function to decode parted response, with initial chunkedString with firs chunk size; in this case, f49:
PartsSeparator="\r\n";
function getPartedBody(partedBodyString) {
    var separatorPosition=partedBodyString.indexOf(PartsSeparator);
    var chunkSize=new Number("0x"+partedBodyString.substring(0,separatorPosition));
    separatorPosition+=PartsSeparator.length;
    var bodyString=new String("BINARY");
    bodyString="";
    if (chunkSize>0)
        bodyString=partedBodyString.substring(separatorPosition,separatorPosition+chunkSize)+
            getChunkedResponse(partedBodyString.substring(separatorPosition+chunkSize+PartsSeparator. length));
    return bodyString;
Hope this helps
regards