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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
package org.apache.tools.ant.taskdefs.condition;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;
import java.util.Locale;
import org.apache.tools.ant.BuildException;
import org.apache.tools.ant.Project;
import org.apache.tools.ant.ProjectComponent;
/**
* Condition to wait for a HTTP request to succeed. Its attribute(s) are:
* url - the URL of the request.
* errorsBeginAt - number at which errors begin at; default=400.
* requestMethod - HTTP request method to use; GET, HEAD, etc. default=GET
* @since Ant 1.5
*/
public class Http extends ProjectComponent implements Condition {
private static final int ERROR_BEGINS = 400;
private static final String DEFAULT_REQUEST_METHOD = "GET";
private String spec = null;
private String requestMethod = DEFAULT_REQUEST_METHOD;
/**
* Set the url attribute
* @param url the url of the request
*/
public void setUrl(String url) {
spec = url;
}
private int errorsBeginAt = ERROR_BEGINS;
/**
* Set the errorsBeginAt attribute
* @param errorsBeginAt number at which errors begin at, default is
* 400
*/
public void setErrorsBeginAt(int errorsBeginAt) {
this.errorsBeginAt = errorsBeginAt;
}
/**
* Sets the method to be used when issuing the HTTP request.
*
* @param method The HTTP request method to use. Valid values are
* the same as those accepted by the
* HttpURLConnection.setRequestMetho d() method,
* such as "GET", "HEAD", "TRACE", etc. The default
* if not specified is "GET".
*
* @see java.net.HttpURLConnection#setRequestMethod
* @since Ant 1.8.0
*/
public void setRequestMethod(String method) {
this.requestMethod = method == null ? DEFAULT_REQUEST_METHOD
: method.toUpperCase(Locale.ENGLISH);
}
/**
* @return true if the HTTP request succeeds
* @exception BuildException if an error occurs
*/
public boolean eval() throws BuildException {
if (spec == null) {
throw new BuildException("No url specified in http condition");
}
log("Checking for " + spec, Project.MSG_VERBOSE);
try {
URL url = new URL(spec);
try {
URLConnection conn = url.openConnection();
if (conn instanceof HttpURLConnection) {
HttpURLConnection http = (HttpURLConnection) conn;
http.setRequestMethod(requestMethod);
int code = http.getResponseCode();
log("Result code for " + spec + " was " + code,
Project.MSG_VERBOSE);
if (code > 0 && code < errorsBeginAt) {
return true;
}
return false;
}
} catch (java.net.ProtocolException pe) {
throw new BuildException("Invalid HTTP protocol: "
+ requestMethod, pe);
} catch (java.io.IOException e) {
return false;
}
} catch (MalformedURLException e) {
throw new BuildException("Badly formed URL: " + spec, e);
}
return true;
}
}
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