public String formPost(String url, Map<String, String> params) throws IOException {
if (url == null || url.trim().length() <= 0) {
throw new IllegalArgumentException("POST url can not be empty");
}
Map<String, String> response = new HashMap<String, String>();
PostMethod poster = new PostMethod(url);
String content = "";
String encoding = HTTP.UTF_8;
String contentType = "application/x-www-form-urlencoded;charset=" + encoding;
if (params != null && params.size() > 0) {
content = format(params, encoding);
}
StringRequestEntity entity = new StringRequestEntity(content, contentType, encoding);
poster.setRequestEntity(entity);
httpClient.executeMethod(poster);
return responseBodyAsString(poster);
}
private static String format(Map<String, String> parameters, final String encoding) {
final StringBuilder sb = new StringBuilder();
Set<Map.Entry<String, String>> entrySet = parameters.entrySet();
Iterator<Map.Entry<String, String>> iterator = entrySet.iterator();
while (iterator.hasNext()) {
Map.Entry<String, String> entry = iterator.next();
final String encodedName = encode(entry.getKey(), encoding);
final String value = entry.getValue();
final String encodedValue = value != null ? encode(value, encoding) : "";
if (sb.length() > 0) {
sb.append("&");
}
sb.append(encodedName);
sb.append("=");
sb.append(encodedValue);
}
return sb.toString();
}
public static String decode(final String content, final String encoding) {
try {
return URLDecoder.decode(content, encoding != null ? encoding : HTTP.DEFAULT_CONTENT_CHARSET);
} catch (UnsupportedEncodingException problem) {
throw new IllegalArgumentException(problem);
}
}
public static String encode(final String content, final String encoding) {
try {
return URLEncoder.encode(content, encoding != null ? encoding : HTTP.DEFAULT_CONTENT_CHARSET);
} catch (UnsupportedEncodingException problem) {
throw new IllegalArgumentException(problem);
}
}
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