static final void sendRespondHeader(
final HashMap<String, Object> conProp,
final OutputStream respond,
String httpVersion,
final int httpStatusCode,
String httpStatusText,
ResponseHeader responseHeader)
throws IOException {
if (respond == null) throw new NullPointerException("The outputstream must not be null.");
if (conProp == null)
throw new NullPointerException("The connection property structure must not be null.");
if (httpVersion == null)
httpVersion = (String) conProp.get(HeaderFramework.CONNECTION_PROP_HTTP_VER);
if (httpVersion == null) httpVersion = HeaderFramework.HTTP_VERSION_1_1;
if (responseHeader == null) responseHeader = new ResponseHeader(httpStatusCode);
try {
if ((httpStatusText == null) || (httpStatusText.length() == 0)) {
if (HeaderFramework.http1_1.containsKey(Integer.toString(httpStatusCode)))
// http1_1 includes http1_0 messages
httpStatusText = HeaderFramework.http1_1.get(Integer.toString(httpStatusCode));
else httpStatusText = "Unknown";
}
final StringBuilder header = new StringBuilder(560);
// "HTTP/0.9" does not have a status line or header in the response
if (!httpVersion.toUpperCase().equals(HeaderFramework.HTTP_VERSION_0_9)) {
// write status line
header
.append(httpVersion)
.append(" ")
.append(Integer.toString(httpStatusCode))
.append(" ")
.append(httpStatusText)
.append("\r\n");
// prepare header
if (!responseHeader.containsKey(HeaderFramework.DATE))
responseHeader.put(HeaderFramework.DATE, HeaderFramework.formatRFC1123(new Date()));
if (!responseHeader.containsKey(HeaderFramework.CONTENT_TYPE))
responseHeader.put(HeaderFramework.CONTENT_TYPE, "text/html; charset=UTF-8"); // fix this
if (!responseHeader.containsKey(RequestHeader.CONNECTION)
&& conProp.containsKey(HeaderFramework.CONNECTION_PROP_PERSISTENT))
responseHeader.put(
RequestHeader.CONNECTION,
(String) conProp.get(HeaderFramework.CONNECTION_PROP_PERSISTENT));
if (!responseHeader.containsKey(RequestHeader.PROXY_CONNECTION)
&& conProp.containsKey(HeaderFramework.CONNECTION_PROP_PERSISTENT))
responseHeader.put(
RequestHeader.PROXY_CONNECTION,
(String) conProp.get(HeaderFramework.CONNECTION_PROP_PERSISTENT));
if (conProp.containsKey(HeaderFramework.CONNECTION_PROP_PERSISTENT)
&& conProp.get(HeaderFramework.CONNECTION_PROP_PERSISTENT).equals("keep-alive")
&& !responseHeader.containsKey(HeaderFramework.TRANSFER_ENCODING)
&& !responseHeader.containsKey(HeaderFramework.CONTENT_LENGTH))
responseHeader.put(HeaderFramework.CONTENT_LENGTH, "0");
// read custom headers
final Iterator<ResponseHeader.Entry> it =
responseHeader.getAdditionalHeaderProperties().iterator();
ResponseHeader.Entry e;
while (it.hasNext()) {
// Append user properties to the main String
// TODO: Should we check for user properites. What if they intersect properties that are
// already in header?
e = it.next();
header.append(e.getKey()).append(": ").append(e.getValue()).append("\r\n");
}
// write header
final Iterator<String> i = responseHeader.keySet().iterator();
String key;
char tag;
int count;
while (i.hasNext()) {
key = i.next();
tag = key.charAt(0);
if ((tag != '*')
&& (tag != '#')) { // '#' in key is reserved for proxy attributes as artificial header
// values
count = responseHeader.keyCount(key);
for (int j = 0; j < count; j++) {
header
.append(key)
.append(": ")
.append(responseHeader.getSingle(key, j))
.append("\r\n");
}
}
}
// end header
header.append("\r\n");
// sending headers to the client
respond.write(UTF8.getBytes(header.toString()));
// flush stream
respond.flush();
}
conProp.put(HeaderFramework.CONNECTION_PROP_PROXY_RESPOND_HEADER, responseHeader);
conProp.put(
HeaderFramework.CONNECTION_PROP_PROXY_RESPOND_STATUS, Integer.toString(httpStatusCode));
} catch (final Exception e) {
// any interruption may be caused be network error or because the user has closed
// the windows during transmission. We simply pass it as IOException
throw new IOException(e.getMessage());
}
}
