/**
* Interrogates the Request parameters and returns a prepared and parsed set of rows from the CSV
* file.
*
* @param params the Request parameters
* @return The rows from the uploaded CSV file
* @throws IOException
*/
public static Iterator<String[]> getRowsFromCsv(final Parameters params) throws IOException {
final Csv csv = new Csv();
InputStream is = params.getFile();
if (params.getDelimiter() != null) {
log.debug("Setting Field Delimiter to [ {} ]", params.getDelimiter());
csv.setFieldDelimiter(params.getDelimiter());
}
if (params.getSeparator() != null) {
log.debug("Setting Field Separator to [ {} ]", params.getSeparator());
csv.setFieldSeparatorRead(params.getSeparator());
}
// Hack to prevent empty-value ending lines from breaking
is =
terminateLines(
is,
params.getSeparator() != null ? params.getSeparator() : csv.getFieldSeparatorRead(),
params.getCharset());
return csv.read(is, params.getCharset());
}
@Override
protected final void doPost(SlingHttpServletRequest request, SlingHttpServletResponse response)
throws ServletException, IOException {
response.setContentType("application/json");
response.setCharacterEncoding("UTF-8");
final JSONObject jsonResponse = new JSONObject();
final TagManager tagManager = request.getResourceResolver().adaptTo(TagManager.class);
final RequestParameter charsetParam = request.getRequestParameter("charset");
final RequestParameter cleanParam = request.getRequestParameter("clean");
final RequestParameter delimiterParam = request.getRequestParameter("delimiter");
final RequestParameter fileParameter = request.getRequestParameter("file");
final RequestParameter separatorParam = request.getRequestParameter("separator");
final RequestParameter converterParam = request.getRequestParameter("converter");
final RequestParameter fallbackConverterParam =
request.getRequestParameter("fallbackConverter");
boolean clean = DEFAULT_CLEAN;
if (cleanParam != null) {
clean =
Boolean.valueOf(
StringUtils.defaultIfEmpty(cleanParam.toString(), String.valueOf(DEFAULT_CLEAN)));
}
String converter = DEFAULT_CONVERTER;
if (converterParam != null) {
converter = StringUtils.defaultIfEmpty(converterParam.toString(), DEFAULT_CONVERTER);
}
String fallbackConverter = NONE_CONVERTER;
if (fallbackConverterParam != null) {
fallbackConverter =
StringUtils.defaultIfEmpty(fallbackConverterParam.toString(), NONE_CONVERTER);
}
String charset = DEFAULT_CHARSET;
if (charsetParam != null) {
charset = StringUtils.defaultIfEmpty(charsetParam.toString(), DEFAULT_CHARSET);
}
Character delimiter = null;
if (delimiterParam != null && StringUtils.isNotBlank(delimiterParam.toString())) {
delimiter = delimiterParam.toString().charAt(0);
}
Character separator = null;
if (separatorParam != null && StringUtils.isNotBlank(separatorParam.toString())) {
separator = separatorParam.toString().charAt(0);
}
final List<TagDataConverter> tagDataConverters = new ArrayList<TagDataConverter>();
final TagDataConverter primaryTagConverter = this.getTagDataConverter(converter);
if (primaryTagConverter != null) {
tagDataConverters.add(primaryTagConverter);
}
final TagDataConverter fallbackTagConverter = this.getTagDataConverter(fallbackConverter);
if (fallbackTagConverter != null) {
tagDataConverters.add(fallbackTagConverter);
}
if (tagDataConverters.isEmpty()) {
log.error("Could not find Tag Data Converter [ {} ]", converter);
response.setStatus(SlingHttpServletResponse.SC_INTERNAL_SERVER_ERROR);
} else if (fileParameter != null && fileParameter.getInputStream() != null) {
InputStream is = fileParameter.getInputStream();
final Csv csv = new Csv();
if (delimiter != null) {
log.debug("Setting Field Delimiter to [ {} ]", delimiter);
csv.setFieldDelimiter(delimiter);
}
if (separator != null) {
log.debug("Setting Field Separator to [ {} ]", separator);
csv.setFieldSeparatorRead(separator);
}
if (clean) {
is = this.stripLineEnds(is, charset, csv.getFieldSeparatorRead());
}
final Iterator<String[]> rows = csv.read(is, charset);
try {
final List<String> result = this.makeTags(tagManager, tagDataConverters, rows);
try {
jsonResponse.put("tagIds", result);
} catch (JSONException e) {
log.error("Could not serialized Tag Maker results into JSON", e);
}
this.addMessage(jsonResponse, result.size() + " tags were processed");
} catch (InvalidTagFormatException e) {
log.error("Could not create Tag due to illegal formatting", e);
this.addMessage(jsonResponse, "Could not create tags due to illegal formatting");
response.setStatus(SlingHttpServletResponse.SC_INTERNAL_SERVER_ERROR);
} catch (RepositoryException e) {
log.error("Could not save Tags to JCR", e);
this.addMessage(jsonResponse, "Could not save tags");
response.setStatus(SlingHttpServletResponse.SC_INTERNAL_SERVER_ERROR);
}
} else {
log.error("Could not find CSV file in request.");
this.addMessage(jsonResponse, "CSV file is missing");
response.setStatus(SlingHttpServletResponse.SC_INTERNAL_SERVER_ERROR);
}
response.getWriter().print(jsonResponse.toString());
}