/** Parses the Content-Type HTTP header */
private void parseContentType(ByteScan.State bss) {
if (!ByteScan.SkipWhitespace(bss)) return;
if (bss.buf[bss.offset] == '"') bss.offset++;
if (!ByteScan.SkipWhitespace(bss)) return;
bss.mark();
while (!bss.eob()
&& (Character.isLetterOrDigit(bss.buf[bss.offset])
|| bss.buf[bss.offset] == '/'
|| bss.buf[bss.offset] == '-'
|| bss.buf[bss.offset] == '+'
|| bss.buf[bss.offset] == '.')) bss.offset++;
contentType = bss.toString().toLowerCase().trim();
if (contentType != null && contentType.indexOf("/") == -1) contentType = null;
if (!ByteScan.Find(bss, ';')) return;
if (!bss.eob()) {
bss.mark();
bss.offset = bss.end;
String inputStr = bss.toString().toLowerCase();
String paramStr;
StringTokenizer st = new StringTokenizer(inputStr, ";");
while (st.hasMoreTokens()) {
paramStr = st.nextToken().trim();
if (paramStr.startsWith("charset")) {
int eqOff = paramStr.indexOf('=', 7);
if (eqOff >= 0) {
charset = paramStr.substring(eqOff + 1).trim().toUpperCase();
charset = cleanCharset(charset);
}
}
}
}
}
/**
* Looks for <META http-equiv="Content-Type" ... or <?xml ... encoding=" and extracts content-type
* and/or charset info
*/
private void findAndParseContentType(ByteScan.State bss) {
if (!ByteScan.FindSkip(bss, '<')) return;
/** XML */
if (ByteScan.StartsWithSkip(bss, xmlChars)) {
// set byte scan region to that inside <?xml ... ?>
bss.mark();
if (!ByteScan.Find(bss, xmlEndChars)) return;
bss.end = bss.offset;
bss.flip();
// find encoding
if (!ByteScan.FindSkip(bss, encodingChars)) return;
// find starting doublequote
if (!ByteScan.FindSkip(bss, '"')) return;
bss.mark();
if (!ByteScan.Find(bss, '"')) return;
charset = bss.toString().toUpperCase();
return;
}
/** HTML */
bss.offset--;
while (ByteScan.FindSkip(bss, '<')) {
if (ByteScan.StartsWithSkip(bss, metaChars)) {
// make sure next comes whitespace
bss.mark();
if (!ByteScan.SkipWhitespace(bss)) return;
if (bss.offset == bss.mark) continue;
if (!ByteScan.StartsWithSkip(bss, httpEquivChars)) continue;
if (!ByteScan.SkipWhitespace(bss)) return;
// skip '=' character
if (bss.buf[bss.offset++] != '=') continue;
if (!ByteScan.SkipWhitespace(bss)) return;
// skip '"' character
if (bss.buf[bss.offset++] != '"') continue;
bss.mark();
if (!ByteScan.FindSkip(bss, '"')) return;
bss.flip();
if (!ByteScan.StartsWith(bss, contentTypeChars)) continue;
bss.flip();
if (!ByteScan.SkipWhitespace(bss)) return;
if (!ByteScan.StartsWithSkip(bss, contentChars)) return;
if (!ByteScan.SkipWhitespace(bss)) return;
// skip '=' character
if (bss.buf[bss.offset++] != '=') continue;
if (!ByteScan.SkipWhitespace(bss)) return;
// skip '=' character
if (bss.buf[bss.offset++] != '"') continue;
bss.mark();
if (!ByteScan.Find(bss, '"')) return;
tmpBss.init(bss.buf, bss.mark, bss.offset);
parseContentType(tmpBss);
if (contentType == null) contentType = "text/html";
break;
} else if (ByteScan.Equals(bss, closeHeadChars)) {
break;
}
}
}
