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/*
 * Copyright (c) 2013-2024 Hutool Team and hutool.cn
 *
 * 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 org.dromara.hutool.http.client.body;

import org.dromara.hutool.core.io.IoUtil;
import org.dromara.hutool.core.io.StreamProgress;
import org.dromara.hutool.core.io.file.FileNameUtil;
import org.dromara.hutool.core.io.file.FileUtil;
import org.dromara.hutool.core.io.stream.SyncInputStream;
import org.dromara.hutool.core.lang.Assert;
import org.dromara.hutool.core.text.StrUtil;
import org.dromara.hutool.http.HttpException;
import org.dromara.hutool.http.HttpGlobalConfig;
import org.dromara.hutool.http.client.Response;
import org.dromara.hutool.http.html.HtmlUtil;
import org.dromara.hutool.http.meta.HeaderName;

import java.io.*;

/**
 * 响应体部分封装
 *
 * @author looly
 */
public class ResponseBody implements HttpBody, Closeable {

	private final Response response;
	/**
	 * Http请求原始流
	 */
	private final SyncInputStream bodyStream;

	/**
	 * 构造
	 *
	 * @param response         响应体
	 * @param in               HTTP主体响应流
	 * @param isAsync          是否异步模式
	 * @param isIgnoreEOFError 是否忽略EOF错误
	 */
	public ResponseBody(final Response response, final InputStream in, final boolean isAsync, final boolean isIgnoreEOFError) {
		this.response = response;
		this.bodyStream = new SyncInputStream(in, response.contentLength(), isAsync, isIgnoreEOFError);
	}

	@Override
	public String contentType() {
		return response.header(HeaderName.CONTENT_TYPE);
	}

	@Override
	public long contentLength() {
		return response.contentLength();
	}

	@Override
	public InputStream getStream() {
		return this.bodyStream;
	}

	@Override
	public void write(final OutputStream out) {
		write(out, false, null);
	}

	/**
	 * 同步数据到内存,以bytes形式存储
	 *
	 * @return this
	 */
	public ResponseBody sync() {
		this.bodyStream.sync();
		return this;
	}

	/**
	 * 获取响应内容的bytes
	 *
	 * @return 响应内容bytes
	 */
	@Override
	public byte[] getBytes() {
		return this.bodyStream.readBytes();
	}

	/**
	 * 获取响应字符串,自动识别判断编码
	 *
	 * @return 响应字符串
	 */
	public String getString() {
		return HtmlUtil.getString(getBytes(), response.charset(), HttpGlobalConfig.isGetCharsetFromContent());
	}

	/**
	 * 将响应内容写出到{@link OutputStream}
* 异步模式下直接读取Http流写出,同步模式下将存储在内存中的响应内容写出
* 写出后会关闭Http流(异步模式) * * @param out 写出的流 * @param isCloseOut 是否关闭输出流 * @param streamProgress 进度显示接口,通过实现此接口显示下载进度 * @return 写出bytes数 * @since 3.3.2 */ public long write(final OutputStream out, final boolean isCloseOut, final StreamProgress streamProgress) { Assert.notNull(out, "[out] must be not null!"); try { return this.bodyStream.copyTo(out, streamProgress); } finally { if (isCloseOut) { IoUtil.closeQuietly(out); } } } /** * 将响应内容写出到文件 * * @param targetFileOrDir 写出到的文件或目录的路径 * @return 写出的文件 */ public File write(final String targetFileOrDir) { return write(FileUtil.file(targetFileOrDir)); } /** * 将响应内容写出到文件
* 异步模式下直接读取Http流写出,同步模式下将存储在内存中的响应内容写出
* 写出后会关闭Http流(异步模式) * * @param targetFileOrDir 写出到的文件或目录 * @return 写出的文件 */ public File write(final File targetFileOrDir) { return write(targetFileOrDir, null); } /** * 将响应内容写出到文件-避免未完成的文件 * 来自:https://gitee.com/dromara/hutool/pulls/407
* 此方法原理是先在目标文件同级目录下创建临时文件,下载之,等下载完毕后重命名,避免因下载错误导致的文件不完整。 * * @param targetFileOrDir 写出到的文件或目录 * @param streamProgress 进度显示接口,通过实现此接口显示下载进度 * @return 写出的文件对象 */ public File write(final File targetFileOrDir, final StreamProgress streamProgress) { return write(targetFileOrDir, null, streamProgress); } /** * 将响应内容写出到文件-避免未完成的文件 * 来自:https://gitee.com/dromara/hutool/pulls/407
* 此方法原理是先在目标文件同级目录下创建临时文件,下载之,等下载完毕后重命名,避免因下载错误导致的文件不完整。 * * @param targetFileOrDir 写出到的文件或目录 * @param tempFileSuffix 临时文件后缀,默认".temp" * @param streamProgress 进度显示接口,通过实现此接口显示下载进度 * @return 写出的文件对象 * @since 5.7.12 */ public File write(final File targetFileOrDir, final String tempFileSuffix, final StreamProgress streamProgress) { Assert.notNull(targetFileOrDir, "[targetFileOrDir] must be not null!"); File outFile = getTargetFile(targetFileOrDir, null); // 目标文件真实名称 final String fileName = outFile.getName(); // 临时文件 outFile = new File(outFile.getParentFile(), FileNameUtil.addTempSuffix(fileName, tempFileSuffix)); try { outFile = writeDirect(outFile, null, streamProgress); // 重命名下载好的临时文件 return FileUtil.rename(outFile, fileName, true); } catch (final Throwable e) { // 异常则删除临时文件 FileUtil.del(outFile); throw new HttpException(e); } } /** * 将响应内容直接写出到文件,目标为目录则从Content-Disposition中获取文件名 * * @param targetFileOrDir 写出到的文件 * @param customParamName 自定义的Content-Disposition中文件名的参数名 * @param streamProgress 进度显示接口,通过实现此接口显示下载进度 * @return 写出的文件 */ public File writeDirect(final File targetFileOrDir, final String customParamName, final StreamProgress streamProgress) { Assert.notNull(targetFileOrDir, "[targetFileOrDir] must be not null!"); final File outFile = getTargetFile(targetFileOrDir, customParamName); write(FileUtil.getOutputStream(outFile), true, streamProgress); return outFile; } @Override public void close() throws IOException { this.bodyStream.close(); } @Override public String toString() { return getString(); } // region ---------------------------------------------------------------------------- Private Methods /** * 从响应头补全下载文件名,返回补全名称后的文件 * * @param targetFileOrDir 目标文件夹或者目标文件 * @param customParamName 自定义的参数名称,如果传入{@code null},默认使用"filename" * @return File 保存的文件 * @since 5.4.1 */ private File getTargetFile(final File targetFileOrDir, final String customParamName) { if (!targetFileOrDir.isDirectory()) { // 非目录直接返回 return targetFileOrDir; } // 从头信息中获取文件名 final String fileName = response.getFileNameFromDisposition(customParamName); if (StrUtil.isBlank(fileName)) { throw new HttpException("Can`t get file name from [Content-Disposition]!"); } return FileUtil.file(targetFileOrDir, fileName); } // endregion ---------------------------------------------------------------------------- Private Methods }




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