andserver FileBrowser 图片浏览

1、需求：通过andserver 查询Android端数据库数据，需要返回图片的URL地址

andserver相关

AndServer的github地址【https://github.com/yanzhenjie/AndServer】
AndServer文档地址【https://www.yanzhenjie.com/AndServer/】
AndServer的相关博客地址【https://blog.csdn.net/yanzhenjie1003/article/details/51661599】比较老

AndServer，一个Android端的web服务器 https://blog.csdn.net/yanzhenjie1003/article/details/64090436

要做一个可以在网页输入地址就可以浏览图片的功能

自定义一个MyFileBrowser

import androidx.annotation.NonNull;
import androidx.annotation.Nullable;import com.yanzhenjie.andserver.annotation.Config;
import com.yanzhenjie.andserver.error.NotFoundException;
import com.yanzhenjie.andserver.framework.body.FileBody;
import com.yanzhenjie.andserver.framework.website.BasicWebsite;
import com.yanzhenjie.andserver.http.HttpRequest;
import com.yanzhenjie.andserver.http.ResponseBody;
import com.yanzhenjie.andserver.util.Assert;
import com.yanzhenjie.andserver.util.DigestUtils;
import com.yanzhenjie.andserver.util.MediaType;
import com.yanzhenjie.andserver.util.ObjectUtils;
import com.yanzhenjie.andserver.util.Patterns;
import com.yanzhenjie.andserver.util.StringUtils;import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.nio.charset.StandardCharsets;@Config
public class MyFileBrowser extends BasicWebsite implements Patterns {private final String mRootPath;/*** 路径组*/public String[] value = {"faceImg", "faceRecordImg", "cardRecordImg"};/*** 照片格式*/public String[] photo_s = {".jpg"};//路径规则     /storage/emulated/0/tecsunFacepublic MyFileBrowser(String rootPath) {Assert.isTrue(!StringUtils.isEmpty(rootPath), "The rootPath cannot be empty.");Assert.isTrue(rootPath.matches(Patterns.PATH), "The format of [%s] is wrong, it should be like [/root/project].");this.mRootPath = rootPath;}@Overridepublic boolean intercept(@NonNull HttpRequest request) {String httpPath = request.getPath();//  /faceImg/1.jpgFile source = findHttpPathResource(httpPath);return source != null;}/*** 判断是否是正确的照片路径** @param httpPath* @return*/private File findHttpPathResource(@NonNull String httpPath) {//修改后的路径检查String[] strings = httpPath.split("/");if (strings.length != 3) {return getDefault();}String filepath = strings[1];String photo = strings[2];//xxx.jpgif (!isPhoto(photo_s, photo)) {//判断是否是图片return getDefault();}boolean flag = isHave(value, filepath);//判断是否是我定义的路径if (flag) {String path = mRootPath + "/" + filepath + "/" + photo;File root = new File(path);return root.exists() ? root : getDefault();} else {return getDefault();}}/*** 照片后后缀判断** @param photos 照片组* @param photo  xx.jpg* @return boolean*/private boolean isPhoto(String[] photos, String photo) {for (String key : photos) {return photo.endsWith(key);}return false;}/*** 判断某个字符串是否存在于数组中** @param stringArray 原数组* @param source      查找的字符串* @return 是否找到*/public static boolean isHave(String[] stringArray, String source) {/*此方法有两个参数，第一个是要查找的字符串数组，第二个是要查找的字符或字符串*/boolean flag = false;for (String key : stringArray) {if (source.contains(key)) {flag = true;break;}}return flag;}private File getDefault() {return null;}/*** Find the path specified resource.** @param httpPath path.* @return return if the file is found.*/private File findPathResource(@NonNull String httpPath) {//修改前的路径检查if ("/".equals(httpPath)) {File root = new File(mRootPath);return root.exists() ? root : null;} else {File sourceFile = new File(mRootPath, httpPath);if (sourceFile.exists()) {return sourceFile;}}return null;}@Overridepublic String getETag(@NonNull HttpRequest request) throws IOException {String httpPath = request.getPath();File resource = findHttpPathResource(httpPath);if (resource != null) {String tag = resource.getAbsolutePath() + resource.lastModified();return DigestUtils.md5DigestAsHex(tag);}return null;}@Overridepublic long getLastModified(@NonNull HttpRequest request) throws IOException {String httpPath = request.getPath();File resource = findHttpPathResource(httpPath);if (resource != null) {return resource.lastModified();}return -1;}@NonNull@Overridepublic ResponseBody getBody(@NonNull HttpRequest request) throws IOException {String httpPath = request.getPath();File resource = findHttpPathResource(httpPath);if (resource == null) {throw new NotFoundException(httpPath);}if (resource.isDirectory()) {File tempFile = File.createTempFile("file_browser", ".html");OutputStream outputStream = new FileOutputStream(tempFile);String folderName = resource.getName();String prefix = String.format(FOLDER_HTML_PREFIX, folderName, folderName);outputStream.write(prefix.getBytes("utf-8"));File[] children = resource.listFiles();if (!ObjectUtils.isEmpty(children)) {for (File file : children) {String filePath = file.getAbsolutePath();int rootIndex = filePath.indexOf(mRootPath);String subHttpPath = filePath.substring(rootIndex + mRootPath.length());subHttpPath = addStartSlash(subHttpPath);String fileItem = String.format(FOLDER_ITEM, subHttpPath, file.getName());outputStream.write(fileItem.getBytes("utf-8"));}}outputStream.write(FOLDER_HTML_SUFFIX.getBytes("utf-8"));return new FileBody(tempFile) {@Nullable@Overridepublic MediaType contentType() {MediaType mimeType = super.contentType();if (mimeType != null) {mimeType = new MediaType(mimeType.getType(), mimeType.getSubtype(), StandardCharsets.UTF_8);}return mimeType;}};} else {return new FileBody(resource);}}private static final String FOLDER_HTML_PREFIX = "<!DOCTYPE html><html><head><meta http-equiv=\"content-type\" " +"content=\"text/html; charset=utf-8\"/> <meta name=\"viewport\" content=\"width=device-width, " +"initial-scale=1, user-scalable=no\"><metaname=\"format-detection\" content=\"telephone=no\"/> " +"<title>%1$s</title><style>.center_horizontal{margin:0 auto;text-align:center;} *,*::after,*::before " +"{box-sizing: border-box;margin: 0;padding: 0;}a:-webkit-any-link {color: -webkit-link;cursor: auto;" +"text-decoration: underline;}ul {list-style: none;display: block;list-style-type: none;-webkit-margin-before:" +" 1em;-webkit-margin-after: 1em;-webkit-margin-start: 0px;-webkit-margin-end: 0px;-webkit-padding-start: " +"40px;}li {display: list-item;text-align: -webkit-match-parent;margin-bottom: 5px;}</style></head><body><h1 " +"class=\"center_horizontal\">%2$s</h1><ul>";private static final String FOLDER_ITEM = "<li><a href=\"%1$s\">%2$s</a></li>";private static final String FOLDER_HTML_SUFFIX = "</ul></body></html>";

使用MyFileBrowser

import android.content.Context;import com.yanzhenjie.andserver.annotation.Config;
import com.yanzhenjie.andserver.framework.config.Multipart;
import com.yanzhenjie.andserver.framework.config.WebConfig;import java.io.File;@Config
public class AppConfing implements WebConfig {@Overridepublic void onConfig(Context context, Delegate delegate) {delegate.addWebsite(new MyFileBrowser(PathManager.getInstance().getWebDir()));delegate.setMultipart(Multipart.newBuilder().allFileMaxSize(1024 * 1024 * 20) // 20M.fileMaxSize(1024 * 1024 * 5) // 5M.maxInMemorySize(1024 * 10) // 1024 * 10 bytes.uploadTempDir(new File(context.getCacheDir(), "_server_upload_cache_")).build());}
}

public class PathManager {private static PathManager sInstance;public static PathManager getInstance() {if (sInstance == null) {synchronized (PathManager.class) {if (sInstance == null) {sInstance = new PathManager();}}}return sInstance;}private String path;private PathManager() {path = FileUtils.ROOT + FileUtils.DIR;//文件在手机中的路径
//        path = FileUtils.ROOT + FileUtils.faceDIR;FileUtils.createNoMedia(path);}public String getRootDir() {return path;}public String getWebDir() {return path;}
}

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