/**
* Returns the content length of the specified web socket message. If the specified message is not
* a web socket message, {@code -1} is returned.
*/
private static int getWebSocketContentLength(HttpHeader message) {
// WebSockset messages have constant content-lengths.
if (message instanceof HttpRequestHeader) {
HttpRequestHeader req = (HttpRequestHeader) message;
if (HttpMethod.GET.equals(req.getMethod())
&& req.containsHeader(Names.SEC_WEBSOCKET_KEY1)
&& req.containsHeader(Names.SEC_WEBSOCKET_KEY2)) {
return 8;
}
} else if (message instanceof HttpResponseHeader) {
HttpResponseHeader res = (HttpResponseHeader) message;
if (res.getStatus().getCode() == 101
&& res.containsHeader(Names.SEC_WEBSOCKET_ORIGIN)
&& res.containsHeader(Names.SEC_WEBSOCKET_LOCATION)) {
return 16;
}
}
// Not a web socket message
return -1;
}
public HttpResponse getResponse(HttpRequestHeader hdr) {
Log.i(LOG_TAG, " getResponse() started");
HttpResponse response;
if (hdr.getHeaderParams() == null) {
Log.e(LOG_TAG, "No header params found in request");
return new HttpResponse(HttpResponse.HTTP_BADREQUEST, "No header params found in request");
}
String method = hdr.getHeaderParams().getProperty("method");
if (method == null) {
Log.e(LOG_TAG, "No method in request headers");
return new HttpResponse(HttpResponse.HTTP_BADREQUEST, "No method in request headers");
}
if (!method.equalsIgnoreCase("GET")) {
Log.e(LOG_TAG, "getResponse() - only GET supported");
return new HttpResponse(HttpResponse.HTTP_NOTIMPLEMENTED, method + " not supported");
}
String filename = hdr.getHeaderParams().getProperty("uri");
if (filename == null
|| filename.startsWith("..")
|| filename.endsWith("..")
|| filename.indexOf("../") >= 0) {
Log.e(LOG_TAG, "getResponse() - file not found");
return new HttpResponse(HttpResponse.HTTP_FORBIDDEN, "Relative paths not allowed");
}
try {
String mime = "";
ContentInputStreamAdapter.ContentInputStream responseData =
inputStreamAdapter.getContentInputStream(filename);
if (responseData == null) {
return new HttpResponse(HttpResponse.HTTP_NOTFOUND, "File not found");
}
long startFrom = -1;
long endAt = -1;
String range = hdr.getHeaderParams().getProperty("range");
if (range != null) {
Log.i(LOG_TAG, "Request contains a range: " + range);
if (range.startsWith("bytes=")) {
range = range.substring("bytes=".length());
int minus = range.indexOf('-');
try {
if (minus > 0) {
startFrom = Long.parseLong(range.substring(0, minus));
endAt = Long.parseLong(range.substring(minus + 1));
}
} catch (NumberFormatException nfe) {
Log.w(LOG_TAG, "Non Fatal Error extracting range :" + range, nfe);
startFrom = -1;
endAt = -1;
}
}
}
if (startFrom >= 0) {
if (startFrom >= responseData.contentLength) {
response =
new HttpResponse(
HttpResponse.HTTP_RANGE_NOT_SATISFIABLE, HttpResponse.MIME_PLAINTEXT, "");
response.addHeader("Content-Range", "bytes 0-0/" + responseData.contentLength);
if (mime.startsWith("application/")) {
response.addHeader(
"Content-Disposition", "attachment; filename=\"" + responseData.filename + "\"");
}
} else {
response =
new HttpResponse(
HttpResponse.HTTP_PARTIALCONTENT, responseData.mime, responseData.content);
if (endAt < 0) {
endAt = responseData.contentLength - 1;
}
long length = endAt - startFrom + 1;
if (length < 0) {
length = 0;
}
if (startFrom > 0) {
responseData.content.skip(startFrom);
}
response.addHeader("Content-Length", "" + length);
response.addHeader(
"Content-Range",
"bytes " + startFrom + "-" + endAt + "/" + responseData.contentLength);
}
} else {
response = new HttpResponse(HttpResponse.HTTP_OK, responseData.mime, responseData.content);
response.addHeader("Content-Length", "" + responseData.contentLength);
response.addHeader("Accept-Ranges", "bytes");
}
response.addHeader("Original-Length", "" + responseData.contentLength);
response.addHeader(
"Last-Modified", dateFormatter.format(new Date(responseData.lastModifiedDate)));
} catch (IOException ioe) {
response =
new HttpResponse(HttpResponse.HTTP_INTERNALERROR, "IOException: " + ioe.getMessage());
Log.e(LOG_TAG, "Error Reading file", ioe);
}
response.addHeader("Date", dateFormatter.format(new Date()));
response.addHeader("Content-Type", "audio/x-m4a");
response.addHeader("Connection", "close");
response.addHeader("Cache-Control", "no-cache");
response.addHeader("Expires", "-1");
response.addHeader("Pragma", "no-cache");
Log.i(LOG_TAG, " getResponse() ended. Response = " + response);
return response;
}
