/* (non-Javadoc)
* @see thredds.servlet.DatasetSource#isMine(javax.servlet.http.HttpServletRequest)
*/
public boolean isMine(HttpServletRequest req) {
StringBuffer urlbuf = req.getRequestURL();
String url;
try {
url = URLDecoder.decode(urlbuf.toString(), "UTF-8");
} catch (UnsupportedEncodingException e) {
return false;
}
if (url.contains("_expr_") && FerretCommands.containsCommand(url)) {
return true;
}
return false;
}
public NetcdfFile getNetcdfFile(HttpServletRequest req, HttpServletResponse res)
throws IOException {
StringBuffer jnl =
new StringBuffer("DEFINE ALIAS letdeq1 let/d=1\nDEFINE ALIAS ATTRCMD SET ATT/LIKE=\n");
StringBuffer urlbuf = req.getRequestURL();
String url = URLDecoder.decode(urlbuf.toString(), "UTF-8");
if (url.length() == urlbuf.length()) {
// Length unchanged, decoding was unnecessary.
url = urlbuf.toString();
}
log.debug("building netcdf file from " + url);
String base = getBaseURL(url);
ArrayList<String> expressions = getExpressions(url);
FerretIOServiceProvider fiosp = new FerretIOServiceProvider();
String data_path = fiosp.getDataDir();
if (expressions.size() == 2) {
if (!expressions.get(0).trim().equals("")) {
List<String> expression_one = new ArrayList<String>();
String od = URLDecoder.decode(expressions.get(0), "UTF-8");
String[] urls = od.split(",");
for (int i = 0; i < urls.length; i++) {
String[] cmds;
if (urls[i].contains("_cr_")) {
cmds = urls[i].split("_cr_");
for (int j = 0; j < cmds.length; j++) {
expression_one.add(cmds[j]);
}
} else if (urls[i].contains(";")) {
cmds = urls[i].split(";");
for (int j = 0; j < cmds.length; j++) {
expression_one.add(cmds[j]);
}
} else {
expression_one.add(urls[i]);
}
}
for (int i = 0; i < expression_one.size(); i++) {
String dataURL = URLDecoder.decode(expression_one.get(i), "UTF-8");
if (FerretCommands.containsCommand(dataURL)) {
// This is actually a command, not a data URL. Treat it as such...
if (!FerretCommands.containsForbiddenCommand(dataURL)) {
jnl.append(dataURL + "\n");
}
} else {
if (!FerretCommands.containsForbiddenCommand(dataURL)) {
int ds = i + 2;
jnl.append("use \"" + dataURL + "\"\n");
}
}
}
}
// Everything in the first bracket goes before the dataset.
jnl.append("use \"" + base + "\"\n");
if (!expressions.get(1).trim().equals("")) {
// Decode the expression because it might contain an encode URL.
String expr_two = URLDecoder.decode(expressions.get(1), "UTF-8");
String[] cmds;
if (expr_two.contains("_cr_")) {
cmds = expr_two.split("_cr_");
} else {
cmds = expr_two.split(";");
}
for (int i = 0; i < cmds.length; i++) {
cmds[i] = cmds[i].replaceAll("_q-t_", "\"");
if (!FerretCommands.containsForbiddenCommand(cmds[i])) {
jnl.append(cmds[i].replace("_qt_", "\"") + "\n");
}
}
}
} else if (expressions.size() == 1) {
if (!expressions.get(0).trim().equals("")) {
String od = URLDecoder.decode(expressions.get(0), "UTF-8");
String[] urls = od.split(",");
for (int i = 0; i < urls.length; i++) {
String dataURL = URLDecoder.decode(urls[i], "UTF-8");
if (FerretCommands.containsCommand(dataURL)) {
// This is actually a command, not a data URL. Treat it as such...
if (!FerretCommands.containsForbiddenCommand(dataURL)) {
jnl.append(dataURL + "\n");
}
} else {
if (!FerretCommands.containsForbiddenCommand(dataURL)) {
int ds = i + 2;
jnl.append("use \"" + dataURL.replace("_qt_", "\"") + "\"\n");
}
}
}
}
} else if (expressions.size() == 0) {
throw new IOException(
"Expression parsing failed for this URL. "
+ url
+ " Now expressions found inside the curly brackets.");
} else if (expressions.size() > 2) {
throw new IOException(
"Expression parsing failed for this URL. " + url + " Too many expressions found.");
}
String key = JDOMUtils.MD5Encode(jnl.toString());
String script = data_path + File.separator + "data_expr_" + key + ".jnl";
log.debug("using " + script + " for temporary script file.");
if (script.contains("../") || script.contains("/..")) {
throw new IOException("Illegal script file name.");
}
File script_file = new File(script);
if (!script_file.exists()) {
PrintWriter data_script = new PrintWriter(new FileOutputStream(script_file));
data_script.println(jnl);
data_script.close();
}
RandomAccessFile raf = new RandomAccessFile(script, "r");
return new FerretNetcdfFile(raf, req.getRequestURI());
}
