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/**
* ====================================================================
* Codificacion {@code application-www-www-form-urlencoded}.
* Los valores son codificados en tuplas de valores llaves separados
* por '&', con un '=' entre la llave y el valor.
* ====================================================================
*/
package httpcli;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.net.URLEncoder;
import java.nio.charset.Charset;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import httpcli.io.IOUtils;
public class FormBody extends RequestBody {
protected final List<String> keys = new ArrayList<String>();
protected final List<Object> values = new ArrayList<Object>();
public FormBody() {
}
public FormBody(Map<String, Object> map) {
addMap(map);
}
/**
* @param charset
* @return el tipo de contenido para POST o PUT.
*/
@Override public String contentType(Charset charset) {
return "application/x-www-form-urlencoded; charset=" + charset.name();
}
@Override public long contentLength(Charset charset) throws IOException {
ByteArrayOutputStream baos = null;
try {
baos = IOUtils.arrayOutputStream();
writeTo(baos, charset);
return baos.size();
} finally {
IOUtils.closeQuietly(baos);
}
}
@Override public void writeTo(OutputStream out, Charset chrst) throws IOException {
for (int i = 0, size = size(); i < size; i++) {
if (i > 0) out.write('&');
out.write(URLEncoder.encode(key(i), chrst.name()).getBytes());
out.write('=');
out.write(URLEncoder.encode(valueStr(i), chrst.name()).getBytes());
}
}
public String encodedUrlParams(Charset chrst) throws IOException {
ByteArrayOutputStream baos = null;
try {
baos = IOUtils.arrayOutputStream();
writeTo(baos, chrst);
return new String(baos.toByteArray(), chrst);
} finally {
IOUtils.closeQuietly(baos);
}
}
public int size() {
return keys.size();
}
public FormBody add(String key, Object value) {
keys.add(key);
values.add(value);
return this;
}
public FormBody addMap(Map<String, Object> map) {
for (Map.Entry<String, Object> entry : map.entrySet()) {
add(entry.getKey(), entry.getValue());
}
return this;
}
public String key(int index) {
return keys.get(index);
}
public Object value(int index) {
return values.get(index);
}
public String valueStr(int index) {
Object value = value(index);
return value == null ? "" : value.toString();
}
@Override public String toString() {
try {
return encodedUrlParams(HttpRequest.DEFAULT_ENCODING);
} catch(Exception e) {
return "";
}
}
}
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