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A micro framework for creating web applications in Kotlin and Java 8 with minimal effort
/*
* Copyright 2011- Per Wendel
*
* Licensed 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 spark;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Enumeration;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.TreeSet;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;
import spark.route.HttpMethod;
import spark.route.RouteMatch;
import spark.utils.IOUtils;
import spark.utils.SparkUtils;
/**
* Provides information about the HTTP request
*
* @author Per Wendel
*/
public class Request {
private static final org.slf4j.Logger LOG = org.slf4j.LoggerFactory.getLogger(Request.class);
private static final String USER_AGENT = "user-agent";
private Map params;
private List splat;
private QueryParamsMap queryMap;
private HttpMethod httpMethod;
private HttpServletRequest servletRequest;
private Session session = null;
/* Lazy loaded stuff */
private String body = null;
private Set headers = null;
// request.body # request body sent by the client (see below), DONE
// request.scheme # "http" DONE
// request.path_info # "/foo", DONE
// request.port # 80 DONE
// request.request_method # "GET", DONE
// request.query_string # "", DONE
// request.content_length # length of request.body, DONE
// request.media_type # media type of request.body DONE, content type?
// request.host # "example.com" DONE
// request["SOME_HEADER"] # value of SOME_HEADER header, DONE
// request.user_agent # user agent (used by :agent condition) DONE
// request.url # "http://example.com/example/foo" DONE
// request.ip # client IP address DONE
// request.env # raw env hash handed in by Rack, DONE
// request.get? # true (similar methods for other verbs)
// request.secure? # false (would be true over ssl)
// request.forwarded? # true (if running behind a reverse proxy)
// request.cookies # hash of browser cookies, DONE
// request.xhr? # is this an ajax request?
// request.script_name # "/example"
// request.form_data? # false
// request.referrer # the referrer of the client or '/'
protected Request() {
// Used by wrapper
}
/**
* Constructor
*/
Request(RouteMatch match, HttpServletRequest request) {
this.httpMethod = match.getHttpMethod();
this.servletRequest = request;
List requestList = SparkUtils.convertRouteToList(match.getRequestURI());
List matchedList = SparkUtils.convertRouteToList(match.getMatchUri());
params = getParams(requestList, matchedList);
splat = getSplat(requestList, matchedList);
}
/**
* Returns the value of the provided route pattern parameter.
* Example: parameter 'name' from the following pattern: (get '/hello/:name')
*
* @return null if the given param is null or not found
*/
public String params(String param) {
if (param == null) {
return null;
}
if (param.startsWith(":")) {
return params.get(param.toLowerCase()); // NOSONAR
} else {
return params.get(":" + param.toLowerCase()); // NOSONAR
}
}
/**
* Returns an arrat containing the splat (wildcard) parameters
*/
public String[] splat() {
return splat.toArray(new String[splat.size()]);
}
/**
* Returns request method e.g. GET, POST, PUT, ...
*/
public String requestMethod() {
return httpMethod.name();
}
/**
* Returns the scheme
*/
public String scheme() {
return servletRequest.getScheme();
}
/**
* Returns the host
*/
public String host() {
return servletRequest.getHeader("host");
}
/**
* Returns the user-agent
*/
public String userAgent() {
return servletRequest.getHeader(USER_AGENT);
}
/**
* Returns the server port
*/
public int port() {
return servletRequest.getServerPort();
}
/**
* Returns the path info
* Example return: "/example/foo"
*/
public String pathInfo() {
return servletRequest.getPathInfo();
}
/**
* Returns the URL string
*/
public String url() {
return servletRequest.getRequestURL().toString();
}
/**
* Returns the content type of the body
*/
public String contentType() {
return servletRequest.getContentType();
}
/**
* Returns the client's IP address
*/
public String ip() {
return servletRequest.getRemoteAddr();
}
/**
* Returns the request body sent by the client
*/
public String body() {
if (body == null) {
try {
body = IOUtils.toString(servletRequest.getInputStream());
} catch (Exception e) {
LOG.warn("Exception when reading body", e);
}
}
return body;
}
/**
* Returns the length of request.body
*/
public int contentLength() {
return servletRequest.getContentLength();
}
/**
* Returns the value of the provided queryParam
* Example: query parameter 'id' from the following request URI: /hello?id=foo
*/
public String queryParams(String queryParam) {
return servletRequest.getParameter(queryParam);
}
/**
* Returns the value of the provided header
*/
public String headers(String header) {
return servletRequest.getHeader(header);
}
/**
* Returns all query parameters
*/
public Set queryParams() {
return servletRequest.getParameterMap().keySet();
}
/**
* Returns all headers
*/
public Set headers() {
if (headers == null) {
headers = new TreeSet();
Enumeration enumeration = servletRequest.getHeaderNames();
while (enumeration.hasMoreElements()) {
headers.add(enumeration.nextElement());
}
}
return headers;
}
/**
* Returns the query string
*/
public String queryString() {
return servletRequest.getQueryString();
}
/**
* Sets an attribute on the request (can be fetched in filters/routes later in the chain)
* @param attribute The attribute
* @param value The attribute value
*/
public void attribute(String attribute, Object value) {
servletRequest.setAttribute(attribute, value);
}
/**
* Gets the value of the provided attribute
* @param attribute The attribute value or null if not present
*/
public Object attribute(String attribute) {
return servletRequest.getAttribute(attribute);
}
/**
* Returns all attributes
*/
public Set attributes() {
Set attrList = new HashSet();
Enumeration attributes = (Enumeration) servletRequest.getAttributeNames();
while (attributes.hasMoreElements()) {
attrList.add(attributes.nextElement());
}
return attrList;
}
/**
* Gets the raw HttpServletRequest object handed in by Jetty
*/
public HttpServletRequest raw() {
return servletRequest;
}
public QueryParamsMap queryMap() {
initQueryMap();
return queryMap;
}
public QueryParamsMap queryMap(String key) {
return queryMap().get(key);
}
private void initQueryMap() {
if (queryMap == null) {
queryMap = new QueryParamsMap(raw());
}
}
/**
* Returns the current session associated with this request,
* or if the request does not have a session, creates one.
*
* @return the session associated with this request
*/
public Session session() {
if (session == null) {
session = new Session(servletRequest.getSession());
}
return session;
}
/**
* Returns the current session associated with this request, or if there is
* no current session and create is true, returns a new session.
*
* @param create true to create a new session for this request if necessary;
* false to return null if there's no current session
* @return the session associated with this request or null if
* create is false and the request has no valid session
*/
public Session session(boolean create) {
if (session == null) {
HttpSession httpSession = servletRequest.getSession(create);
if (httpSession != null) {
session = new Session(httpSession);
}
}
return session;
}
/**
* @return request cookies (or empty Map if cookies dosn't present)
*/
public Map cookies() {
Map result = new HashMap();
Cookie[] cookies = servletRequest.getCookies();
if (cookies != null) {
for (Cookie cookie : cookies) {
result.put(cookie.getName(), cookie.getValue());
}
}
return result;
}
/**
* Gets cookie by name.
* @param name name of the cookie
* @return cookie value or null if the cookie was not found
*/
public String cookie(String name) {
Cookie[] cookies = servletRequest.getCookies();
if (cookies != null) {
for (Cookie cookie : cookies) {
if (cookie.getName().equals(name)) {
return cookie.getValue();
}
}
}
return null;
}
private static Map getParams(List request, List matched) {
LOG.debug("get params");
Map params = new HashMap();
for (int i = 0; (i < request.size()) && (i < matched.size()); i++) {
String matchedPart = matched.get(i);
if (SparkUtils.isParam(matchedPart)) {
LOG.debug("matchedPart: "
+ matchedPart
+ " = "
+ request.get(i));
params.put(matchedPart.toLowerCase(), request.get(i));
}
}
return Collections.unmodifiableMap(params);
}
private static List getSplat(List request, List matched) {
LOG.debug("get splat");
int nbrOfRequestParts = request.size();
int nbrOfMatchedParts = matched.size();
boolean sameLength = (nbrOfRequestParts == nbrOfMatchedParts);
List splat = new ArrayList();
for (int i = 0; (i < nbrOfRequestParts) && (i < nbrOfMatchedParts); i++) {
String matchedPart = matched.get(i);
if (SparkUtils.isSplat(matchedPart)) {
StringBuilder splatParam = new StringBuilder(request.get(i));
if (!sameLength && (i == (nbrOfMatchedParts -1))) {
for (int j = i + 1; j < nbrOfRequestParts; j++) {
splatParam.append("/");
splatParam.append(request.get(j));
}
}
splat.add(splatParam.toString());
}
}
return Collections.unmodifiableList(splat);
}
}