/*
* WWWFormURLDecode.java
*
* Copyright 2008 Mark Logic Corporation.
* Portions Copyright 2007 Sun Microsystems, Inc.
* All rights reserved.
*
* The contents of this file are subject to the terms of either the GNU
* General Public License Version 2 only ("GPL") or the Common
* Development and Distribution License("CDDL") (collectively, the
* "License"). You may not use this file except in compliance with the
* License. You can obtain a copy of the License at
* https://xproc.dev.java.net/public/CDDL+GPL.html or
* docs/CDDL+GPL.txt in the distribution. See the License for the
* specific language governing permissions and limitations under the
* License. When distributing the software, include this License Header
* Notice in each file and include the License file at docs/CDDL+GPL.txt.
*/
package com.xmlcalabash.library;
import com.xmlcalabash.core.XProcConstants;
import com.xmlcalabash.core.XProcException;
import com.xmlcalabash.core.XProcRuntime;
import com.xmlcalabash.util.TreeWriter;
import com.xmlcalabash.util.TypeUtils;
import com.xmlcalabash.io.WritablePipe;
import net.sf.saxon.s9api.SaxonApiException;
import net.sf.saxon.s9api.QName;
import com.xmlcalabash.runtime.XAtomicStep;
/**
*
* @author ndw
*/
public class WWWFormURLDecode extends DefaultStep {
public static final QName _value = new QName("", "value");
public static final QName _name = new QName("", "name");
public static final QName c_paramset = new QName("c",XProcConstants.NS_XPROC_STEP,"param-set");
public static final QName c_param = new QName("c", XProcConstants.NS_XPROC_STEP, "param");
private WritablePipe result = null;
/** Creates a new instance of FormURLDecode */
public WWWFormURLDecode(XProcRuntime runtime, XAtomicStep step) {
super(runtime,step);
}
public void setOutput(String port, WritablePipe pipe) {
result = pipe;
}
public void reset() {
result.resetWriter();
}
public void run() throws SaxonApiException {
super.run();
String value = getOption(_value).getString();
TreeWriter tree = new TreeWriter(runtime);
tree.startDocument(step.getNode().getBaseURI());
tree.addStartElement(c_paramset);
tree.startContent();
String[] params = value.split("&");
for (int idx = 0; idx < params.length; idx++) {
String p = params[idx];
int pos = p.indexOf("=");
if (pos > 0) {
String name = p.substring(0, pos);
String val = p.substring(pos+1);
try {
TypeUtils.checkType(runtime, name, XProcConstants.xs_NCName, null);
} catch (XProcException e) {
throw XProcException.stepError(61);
}
tree.addStartElement(c_param);
tree.addAttribute(_name, name);
tree.addAttribute(_value, decode(val));
tree.startContent();
tree.addEndElement();
} else {
throw new XProcException(step.getNode(), "Badly formatted parameters");
}
}
tree.addEndElement();
tree.endDocument();
result.write(tree.getResult());
}
private String decode(String val) {
int pos;
String result = "";
while ((pos = val.indexOf("%")) >= 0) {
result += val.substring(0, pos);
try {
String digits = val.substring(pos+1,pos+3);
int dec = Integer.parseInt(digits, 16);
char ch = (char) dec;
result += ch;
} catch (StringIndexOutOfBoundsException ex) {
throw new XProcException("Badly formatted parameters", ex);
} catch (NumberFormatException ex) {
throw new XProcException("Badly formatted parameters", ex);
}
val = val.substring(pos+3);
}
result += val;
return result;
}
}