/**
* Call the GetMethod.
*
* @param url The URL for the HTTP GET method.
* @return GetMethod
* @throws WebserverSystemException If connection failed.
*/
public GetMethod get(final String url, final HashMap<String, String> params)
throws RepositoryException {
GetMethod get = null;
try {
get = new GetMethod(url);
Set<String> paramKeys = params.keySet();
NameValuePair[] paramsArray = new NameValuePair[paramKeys.size()];
Iterator<String> iterator = paramKeys.iterator();
int i = 0;
while (iterator.hasNext()) {
String key = iterator.next();
String value = params.get(key);
paramsArray[i] = new NameValuePair(key, value);
i++;
}
if (params.size() > 0) {
String queryString = EncodingUtil.formUrlEncode(paramsArray, "UTF-8");
get.setQueryString(queryString);
}
// get.setQueryString(paramsArray);
int responseCode = getHttpClient().executeMethod(get);
if ((responseCode / 100) != (HTTP_RESPONSE_OK / 100)) {
String message = get.getResponseBodyAsString();
if (message == null) {
Header header = get.getResponseHeader("eSciDocException");
String value = header.getValue();
if (value != null) {
message = "GET-Request with url " + url + " results with Exception:" + value + " .";
} else {
message = "Connection to '" + url + "' failed with response code " + responseCode;
}
}
get.releaseConnection();
log.info(message);
throw new RepositoryException(message);
}
} catch (HttpException e) {
throw new RepositoryException(e.getMessage(), e);
} catch (IOException e) {
throw new RepositoryException(e.getMessage(), e);
}
return get;
}
/** Guts of the implementation, returns a complete Choices result, or null for a failure. */
private Choices queryPerson(String text, int start, int limit) {
// punt if there is no query text
if (text == null || text.trim().length() == 0) return new Choices(true);
// 1. build CQL query
DCPersonName pn = new DCPersonName(text);
StringBuilder query = new StringBuilder();
query
.append("local.FirstName = \"")
.append(pn.getFirstNames())
.append("\" and local.FamilyName = \"")
.append(pn.getLastName())
.append("\"");
// XXX arbitrary default limit - should be configurable?
if (limit == 0) limit = 50;
NameValuePair args[] = new NameValuePair[6];
args[0] = new NameValuePair("operation", "searchRetrieve");
args[1] = new NameValuePair("version", "1.1");
args[2] = new NameValuePair("recordSchema", "info:srw/schema/1/marcxml-v1.1");
args[3] = new NameValuePair("query", query.toString());
args[4] = new NameValuePair("maximumRecords", String.valueOf(limit));
args[5] = new NameValuePair("startRecord", String.valueOf(start + 1));
HttpClient hc = new HttpClient();
String srUrl = url + "?" + EncodingUtil.formUrlEncode(args, "UTF8");
GetMethod get = new GetMethod(srUrl);
log.debug("Trying SRU query, URL=" + srUrl);
// 2. web request
try {
int status = hc.executeMethod(get);
if (status == 200) {
SAXParserFactory spf = SAXParserFactory.newInstance();
SAXParser sp = spf.newSAXParser();
XMLReader xr = sp.getXMLReader();
SRUHandler handler = new SRUHandler();
// XXX FIXME: should turn off validation here explicitly, but
// it seems to be off by default.
xr.setFeature("http://xml.org/sax/features/namespaces", true);
xr.setContentHandler(handler);
xr.setErrorHandler(handler);
xr.parse(new InputSource(get.getResponseBodyAsStream()));
// this probably just means more results available..
if (handler.hits != handler.result.size())
log.warn(
"Discrepency in results, result.length="
+ handler.result.size()
+ ", yet expected results="
+ handler.hits);
boolean more = handler.hits > (start + handler.result.size());
// XXX add non-auth option; perhaps the UI should do this?
// XXX it's really a policy matter if they allow unauth result.
// XXX good, stop it.
// handler.result.add(new Choice("", text, "Non-Authority: \""+text+"\""));
int confidence;
if (handler.hits == 0) confidence = Choices.CF_NOTFOUND;
else if (handler.hits == 1) confidence = Choices.CF_UNCERTAIN;
else confidence = Choices.CF_AMBIGUOUS;
return new Choices(
handler.result.toArray(new Choice[handler.result.size()]),
start,
handler.hits,
confidence,
more);
}
} catch (HttpException e) {
log.error("SRU query failed: ", e);
return new Choices(true);
} catch (IOException e) {
log.error("SRU query failed: ", e);
return new Choices(true);
} catch (ParserConfigurationException e) {
log.warn("Failed parsing SRU result: ", e);
return new Choices(true);
} catch (SAXException e) {
log.warn("Failed parsing SRU result: ", e);
return new Choices(true);
} finally {
get.releaseConnection();
}
return new Choices(true);
}
