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com.aspectran.web.activity.request.WebRequestBodyParser Maven / Gradle / Ivy
/*
* Copyright (c) 2008-2023 The Aspectran Project
*
* 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 com.aspectran.web.activity.request;
import com.aspectran.core.activity.request.RequestBodyParser;
import com.aspectran.core.activity.request.RequestParseException;
import com.aspectran.core.activity.request.SizeLimitExceededException;
import com.aspectran.core.adapter.RequestAdapter;
import com.aspectran.core.context.rule.type.MethodType;
import com.aspectran.core.lang.Nullable;
import com.aspectran.core.util.ClassUtils;
import com.aspectran.core.util.LinkedMultiValueMap;
import com.aspectran.core.util.MultiValueMap;
import com.aspectran.core.util.StringUtils;
import com.aspectran.core.util.apon.JsonToApon;
import com.aspectran.core.util.apon.Parameters;
import com.aspectran.core.util.apon.XmlToApon;
import com.aspectran.web.support.http.MediaType;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;
import java.net.URLDecoder;
import java.util.List;
import java.util.Map;
/**
* Provides convenient methods to parse the request body.
*
* @since 6.2.0
*/
public class WebRequestBodyParser {
private static final String DEFAULT_ENCODING = "ISO-8859-1";
private static final int BUFFER_SIZE = 1024;
private WebRequestBodyParser() {
}
public static String parseBody(InputStream inputStream, String encoding)
throws IOException, SizeLimitExceededException {
return parseBody(inputStream, encoding, 0L);
}
public static String parseBody(InputStream inputStream, String encoding, long maxSize)
throws IOException, SizeLimitExceededException {
StringBuilder sb = new StringBuilder();
if (encoding == null) {
encoding = DEFAULT_ENCODING;
}
InputStreamReader reader = new InputStreamReader(inputStream, encoding);
char[] buffer = new char[BUFFER_SIZE];
int bytesRead;
long bytesTotal = 0L;
while ((bytesRead = reader.read(buffer)) != -1) {
if (maxSize > 0L) {
bytesTotal += bytesRead;
if (bytesTotal > maxSize) {
throw new SizeLimitExceededException("Maximum request size exceeded; actual: " +
bytesTotal + "; permitted: " + maxSize,
bytesTotal, maxSize);
}
}
sb.append(buffer, 0, bytesRead);
}
return sb.toString();
}
public static MultiValueMap parseURLEncoded(String body, String encoding)
throws UnsupportedEncodingException {
if (StringUtils.isEmpty(body)) {
return null;
}
MultiValueMap multiValueMap = new LinkedMultiValueMap<>();
String[] pairs = StringUtils.tokenize(body, "&");
for (String pair : pairs) {
int idx = pair.indexOf('=');
if (idx == -1) {
String name = URLDecoder.decode(pair, encoding);
multiValueMap.add(name, null);
} else {
String name = URLDecoder.decode(pair.substring(0, idx), encoding);
String value = URLDecoder.decode(pair.substring(idx + 1), encoding);
multiValueMap.add(name, value);
}
}
return multiValueMap;
}
public static void parseURLEncodedFormData(RequestAdapter requestAdapter) throws RequestParseException {
try {
String body = requestAdapter.getBody();
String encoding = requestAdapter.getEncoding();
MultiValueMap multiValueMap = parseURLEncoded(body, encoding);
if (multiValueMap != null) {
requestAdapter.putAllParameters(multiValueMap);
requestAdapter.setBody(null);
}
} catch (Exception e) {
throw new RequestParseException("Could not parse HTTP " + requestAdapter.getRequestMethod() +
" request body", e);
}
}
public static T parseURLEncodedAsParameters(
RequestAdapter requestAdapter, Class requiredType) throws RequestParseException {
try {
String encoding = requestAdapter.getEncoding();
if (encoding == null) {
encoding = DEFAULT_ENCODING;
}
MultiValueMap multiValueMap = parseURLEncoded(requestAdapter.getBody(), encoding);
if (multiValueMap != null && !multiValueMap.isEmpty()) {
T parameters = ClassUtils.createInstance(requiredType);
for (Map.Entry> entry : multiValueMap.entrySet()) {
String name = entry.getKey();
for (String value : entry.getValue()) {
parameters.putValue(name, value);
}
}
return parameters;
}
} catch (Exception e) {
throw new RequestParseException("Failed to parse URL-encoded form request body to required type [" +
requiredType.getName() + "]", e);
}
return null;
}
public static T parseBodyAsParameters(
RequestAdapter requestAdapter, @Nullable MediaType mediaType, Class requiredType)
throws RequestParseException {
if (mediaType == null) {
return null;
}
if (isURLEncodedForm(mediaType)) {
return parseURLEncodedAsParameters(requestAdapter, requiredType);
} else if (MediaType.APPLICATION_JSON.equalsTypeAndSubtype(mediaType)) {
try {
return JsonToApon.from(requestAdapter.getBody(), requiredType);
} catch (IOException e) {
throw new RequestParseException("Failed to parse request body of JSON format to required type [" +
requiredType.getName() + "]", e);
}
} else if (MediaType.APPLICATION_APON.equalsTypeAndSubtype(mediaType)) {
return RequestBodyParser.parseBodyAsParameters(requestAdapter.getBody(), requiredType);
} else if (MediaType.APPLICATION_XML.equalsTypeAndSubtype(mediaType)) {
try {
return XmlToApon.from(requestAdapter.getBody(), requiredType);
} catch (IOException e) {
throw new RequestParseException("Failed to parse request body of XML format to required type [" +
requiredType.getName() + "]", e);
}
} else {
return null;
}
}
public static boolean isMultipartForm(MethodType requestMethod, MediaType mediaType) {
return MethodType.POST.equals(requestMethod) &&
MediaType.MULTIPART_FORM_DATA.equalsTypeAndSubtype(mediaType);
}
public static boolean isURLEncodedForm(MediaType mediaType) {
return MediaType.APPLICATION_FORM_URLENCODED.equalsTypeAndSubtype(mediaType);
}
}
