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Implements methods to connect to DataCite.

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Refactored the method to send get requests to DataCite so it can be used
for the metadata and the doi api.
Implemented a method to send a post request to the doi api.
This commit is contained in:
Pascal-Nicolas Becker
2013-03-20 18:43:24 +01:00
parent 04863a996e
commit b8752e0ddc
1 changed files with 80 additions and 17 deletions
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97
dspace-api/src/main/java/org/dspace/identifier/doi/DataCiteConnector.java
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@@ -18,7 +18,10 @@ import org.apache.http.StatusLine;
import org.apache.http.auth.AuthScope;
import org.apache.http.auth.UsernamePasswordCredentials;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.client.utils.URIBuilder;
import org.apache.http.entity.ContentType;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.util.EntityUtils;
import org.dspace.content.DSpaceObject;
@@ -462,15 +465,90 @@ implements DOIConnector
this.reserved.clear();
}
private DataCiteResponse sendDOIPostRequest(String doi, String url) {
// post mds/doi/
// body should contaion "doi=<doi>\nurl=<url>}n"
DefaultHttpClient httpclient = new DefaultHttpClient();
httpclient.getCredentialsProvider().setCredentials(
new AuthScope(HOST, 443),
new UsernamePasswordCredentials(this.getUsername(), this.getPassword()));
URIBuilder uribuilder = new URIBuilder();
uribuilder.setScheme("https").setHost(HOST).setPath(DOI_PATH
+ doi.substring(DOI.SCHEME.length()));
HttpEntity respEntity = null;
try
{
// assemble request content:
String req = "doi=" + doi + "\n" + "url=" + url + "\n";
ContentType contentType = ContentType.create("text/plain", "UTF-8");
HttpEntity reqEntity = new StringEntity(req, contentType);
HttpPost httppost = new HttpPost(uribuilder.build());
httppost.setEntity(reqEntity);
HttpResponse response = httpclient.execute(httppost);
StatusLine status = response.getStatusLine();
int statusCode = status.getStatusCode();
respEntity = response.getEntity();
if (null == respEntity)
{
return new DataCiteResponse(statusCode, null);
}
return new DataCiteResponse(statusCode, EntityUtils.toString(respEntity, "UTF-8"));
}
catch (IOException e)
{
log.warn("Caught an IOException: " + e.getMessage());
throw new RuntimeException(e);
}
catch (URISyntaxException e)
{
log.error("The URL we constructed to check a DOI "
+ "produced a URISyntaxException. Please check the configuration parameters!");
log.error("The URL was {}.", "https://" + HOST +
DOI_PATH + "/" + doi.substring(DOI.SCHEME.length()));
throw new IllegalArgumentException("The URL we constructed to check a DOI "
+ "produced a URISyntaxException. Please check the configuration parameters!", e);
}
finally
{
try
{
// Release any ressources used by HTTP-Request.
if (null != respEntity)
EntityUtils.consume(respEntity);
}
catch (IOException e)
{
log.warn("Can't release HTTP-Entity: " + e.getMessage());
}
}
}
// TODO
private void sendMetadataDeleteRequest() {
}
private DataCiteResponse sendDOIGetRequest(String doi) {
// get mds/doi/<doi>
return sendGetRequest(doi, DOI_PATH);
}
private DataCiteResponse sendMetadataGetRequest(String doi) {
return sendGetRequest(doi, METADATA_PATH);
}
private DataCiteResponse sendGetRequest(String doi, String path) {
// get mds/metadata/<doi>
DefaultHttpClient httpclient = new DefaultHttpClient();
httpclient.getCredentialsProvider().setCredentials(
new AuthScope(HOST, 443),
new UsernamePasswordCredentials(this.getUsername(), this.getPassword()));
URIBuilder uribuilder = new URIBuilder();
uribuilder.setScheme("https").setHost(HOST).setPath(DOI_PATH
uribuilder.setScheme("https").setHost(HOST).setPath(path
+ doi.substring(DOI.SCHEME.length()));
HttpEntity entity = null;
@@ -517,21 +595,6 @@ implements DOIConnector
}
}
// TODO
private void sendDOIPostRequest() {
}
// TODO
private void sendMetadataDeleteRequest() {
}
// TODO
private DataCiteResponse sendMetadataGetRequest(String doi) {
return null;
}
// TODO
private void sendMetadataPostRequest() {