To whomever can help me!
I am submitting to a web service and receiving an xml file in return. I am
using POST b/c this is too large for a GET. If I use cURL then this works.
However with HttpClient (4.1.2) and the same parameters, I am getting a
truncated xml file returned.
Does anyone have an idea what might be wrong? I include the test file but not
the whole list of parameters I am submitting as this is a further 350Kb.
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.List;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicNameValuePair;
import org.xml.sax.helpers.DefaultHandler;
public class HttpClientTest {
public static void main(String[] args) throws Exception {
new HttpClientTest().runTest();
}
public void runTest() throws Exception {
List<NameValuePair> list = new ArrayList(50000);
list.add(new BasicNameValuePair("db", "pcassay"));
list.add(new BasicNameValuePair("dbfrom", "pcassay"));
// read in ~50000 ids from file. These are existing uids in the
pcassay
// database.
BufferedReader reader = new BufferedReader(new
InputStreamReader(getClass().getClassLoader().getResourceAsStream("ids.txt")));
String line = null;
while (null != (line = reader.readLine())) {
list.add(new BasicNameValuePair("id", line));
}
list.add(new BasicNameValuePair("term",
"summary[activityoutcomemethod]"));
list.add(new BasicNameValuePair("version", "2.0"));
list.add(new BasicNameValuePair("email", "[email protected]"));
list.add(new BasicNameValuePair("tool", "[email protected]"));
System.out.println("#NameValuePairs: " + list.size());
HttpPost post = new
HttpPost("http://eutils.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi";);
UrlEncodedFormEntity entity = new UrlEncodedFormEntity(list);
post.setEntity(entity);
HttpClient client = new DefaultHttpClient();
HttpResponse response = client.execute(post);
// dump to local file so we can refer to it.
File file = File.createTempFile("eutils", ".xml");
System.out.println("Copying eUtils stream to: " + file);
response.getEntity().writeTo(new BufferedOutputStream(new
FileOutputStream(file)));
InputStream is = new BufferedInputStream(new
FileInputStream(file));
// attempt to parse with sax. There will be an error if only a
fragment
// of the xml is returned.
SAXParserFactory factory = SAXParserFactory.newInstance();
SAXParser saxParser = factory.newSAXParser();
saxParser.parse(is, new DefaultHandler() {
});
}
}
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