com.aliyun.odps.tunnel.VolumeTunnel Maven / Gradle / Ivy
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.aliyun.odps.tunnel;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.URI;
import java.net.URISyntaxException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;
import com.aliyun.odps.Odps;
import com.aliyun.odps.OdpsException;
import com.aliyun.odps.commons.transport.Connection;
import com.aliyun.odps.commons.transport.Headers;
import com.aliyun.odps.commons.transport.Response;
import com.aliyun.odps.commons.util.IOUtils;
import com.aliyun.odps.rest.RestClient;
import com.aliyun.odps.tunnel.io.CompressOption;
import com.aliyun.odps.tunnel.io.VolumeInputStream;
import com.aliyun.odps.tunnel.io.VolumeOutputStream;
/**
* 访问ODPS Volume Tunnel服务的入口类
* 暂未开放，仅限内部使用
*
* @author [email protected]
*/
public class VolumeTunnel {
private Configuration config;
/**
* 构造此类对象
*
* @param odps
* {@link com.aliyun.odps.Odps}
*/
public VolumeTunnel(Odps odps) {
this.config = new Configuration(odps);
}
/**
* 设置TunnelServer地址
*
* 没有设置TunnelServer地址的情况下, 自动选择
*
* @param endpoint
*/
public void setEndpoint(String endpoint) {
try {
URI u = new URI(endpoint);
config.setEndpoint(u);
} catch (URISyntaxException e) {
throw new IllegalArgumentException("Invalid endpoint.");
}
}
/**
* 构造一个新的{@link com.aliyun.odps.tunnel.VolumeTunnel.UploadSession}对象。
*
* @param projectName
* 上传File所在的project名称
* @param volumeName
* 上传File所在的volume名称
* @param partition
* 上传File的partition描述，由字母,数字,下划线组成，3-32个字符，举例如下: my_pt_001
*/
public UploadSession createUploadSession(String projectName, String volumeName, String partition)
throws TunnelException {
return new UploadSession(projectName, volumeName, partition);
}
/**
* 根据已有uploadId获取一个{@link com.aliyun.odps.tunnel.VolumeTunnel.UploadSession}对象。
*
* @param projectName
* 上传File所在的project名称
* @param volumeName
* 上传File所在的volume名称
* @param partition
* 上传File的partition描述，由字母,数字,下划线组成，3-32个字符，举例如下: my_pt_001
* @param uploadId
* Upload的唯一标识符
*/
public UploadSession getUploadSession(String projectName, String volumeName, String partition,
String uploadId) throws TunnelException {
return new UploadSession(projectName, volumeName, partition, uploadId);
}
/**
* 构造一个新的{@link com.aliyun.odps.tunnel.VolumeTunnel.DownloadSession}对象。
*
* @param projectName
* 下载File所在project名称
* @param volumeName
* 下载File所在volume名称
* @param partition
* 下载File的partition描述
* @param fileName
* 下载File的名称
*/
public DownloadSession createDownloadSession(String projectName, String volumeName,
String partition, String fileName)
throws TunnelException {
return new DownloadSession(projectName, volumeName, partition, fileName);
}
/**
* 根据已有downloadId获取一个{@link com.aliyun.odps.tunnel.VolumeTunnel.DownloadSession}对象。
*
* @param projectName
* 下载File所在project名称
* @param volumeName
* 下载File所在volume名称
* @param partition
* 下载File的partition描述
* @param fileName
* 下载File的名称
* @param downloadId
* VolumeTunnel.DownloadSession的唯一标识符
*/
public DownloadSession getDownloadSession(String projectName, String volumeName,
String partition, String fileName, String downloadId)
throws TunnelException {
return new DownloadSession(projectName, volumeName, partition, fileName, downloadId);
}
/**
* UploadStatus表示当前Upload的状态
*
UNKNOWN 未知
*
NORMAL 正常
*
CLOSING 关闭中
*
CLOSED 已关闭
*
CANCELED 已取消
*
EXPIRED 已过期
*
CRITICAL 严重错误
*/
public static enum UploadStatus {
UNKNOWN, NORMAL, CLOSING, CLOSED, CANCELED, EXPIRED, CRITICAL
}
/**
* UploadSession表示一个向ODPS表中上传数据的会话
*
*
* 向ODPS表上传数据的流程如下:
* 1) 创建UploadSession
* 2) 上传数据
* 3) 提交
*
*/
public class UploadSession {
private String id;
private String projectName;
private String volumeName;
private String partitionSpec;
private HashMap fileLists = new HashMap();
private UploadStatus status = UploadStatus.UNKNOWN;
private Configuration conf;
private RestClient tunnelServiceClient;
/**
* 构造一个新的{@link UploadSession}对象。
*
* @param projectName
* 上传File所在的project名称。
* @param volumeName
* 上传File所在Volume名称。
* @param partitionSpec
* 上传File的partition描述，格式如下: pt=xxx,dt=xxx。
*/
public UploadSession(String projectName, String volumeName, String partitionSpec)
throws TunnelException {
this.conf = VolumeTunnel.this.config;
this.projectName = projectName;
this.volumeName = volumeName;
this.partitionSpec = partitionSpec;
tunnelServiceClient = conf.newRestClient(projectName);
initiate();
}
/**
* 根据已有的uploadId构造一个{@link UploadSession}对象。
*
* @param projectName
* 上传File所在的project名称。
* @param volumeName
* 上传File所在Volume名称。
* @param partitionSpec
* 上传File的partition描述，格式如下: pt=xxx,dt=xxx。
* @param uploadId
* UploadSession的唯一标识符
*/
public UploadSession(String projectName, String volumeName, String partitionSpec,
String uploadId)
throws TunnelException {
this.conf = VolumeTunnel.this.config;
this.projectName = projectName;
this.volumeName = volumeName;
this.partitionSpec = partitionSpec;
this.id = uploadId;
tunnelServiceClient = conf.newRestClient(projectName);
reload();
}
private void initiate() throws TunnelException {
HashMap headers = new HashMap();
headers.put(Headers.CONTENT_LENGTH, String.valueOf(0));
HashMap params = new HashMap();
params.put(TunnelConstants.TYPE, "volumefile");
params
.put(TunnelConstants.TARGET, projectName + "/" + volumeName + "/" + partitionSpec + "/");
Connection conn = null;
try {
conn = tunnelServiceClient.connect(getResource(), "POST", params, headers);
Response resp = conn.getResponse();
if (resp.isOK()) {
loadFromJson(conn.getInputStream());
} else {
TunnelException e = new TunnelException(conn.getInputStream());
e.setRequestId(resp.getHeader(HttpHeaders.HEADER_ODPS_REQUEST_ID));
throw e;
}
} catch (IOException e) {
throw new TunnelException("Failed to create upload session with tunnel endpoint "
+ tunnelServiceClient.getEndpoint(), e);
} catch (TunnelException e) {
throw e;
} catch (OdpsException e) {
throw new TunnelException(e.getMessage(), e);
} finally {
if (conn != null) {
try {
conn.disconnect();
} catch (IOException e) {
// nothing
}
}
}
}
/**
* 创建{@link java.io.OutputStream}用来将数据流入到指定File。
*
* @param fileName
* 指定File的名称。
*/
public OutputStream openOutputStream(String fileName) throws TunnelException, IOException {
return openOutputStream(fileName, false, false);
}
/**
* 创建{@link java.io.OutputStream}用来将数据流入到指定File。
*
* @param fileName
* 指定File的名称。
* @param compress
* 设置压缩参数对传输数据进行压缩
*/
public OutputStream openOutputStream(String fileName, boolean compress)
throws TunnelException, IOException {
return openOutputStream(fileName, compress, false);
}
/**
* 创建{@link java.io.OutputStream}用来将数据流入到指定File。
*
* @param fileName
* 指定File的名称。
* @param compress
* 数据传输是否进行压缩
* @param append
* 是否采用断点续传
*/
public OutputStream openOutputStream(String fileName, boolean compress, boolean append)
throws TunnelException, IOException {
HashMap params = new HashMap();
HashMap headers = new HashMap();
headers.put(Headers.CONTENT_TYPE, "text/plain");
headers.put(Headers.TRANSFER_ENCODING, Headers.CHUNKED);
headers.put(HttpHeaders.HEADER_ODPS_TUNNEL_VERSION,
String.valueOf(TunnelConstants.VERSION));
if (compress) {
if (conf.getCompressOption().algorithm.equals(CompressOption.CompressAlgorithm.ODPS_ZLIB)) {
headers.put(HttpHeaders.CONTENT_ENCODING, "deflate");
} else {
throw new TunnelException("invalid compression option.");
}
}
fileName = formatFileName(fileName);
params.put(TunnelConstants.BLOCKID, fileName);
if (append) {
params.put(TunnelConstants.RESUME_MODE, null);
}
VolumeOutputStream vout = null;
Connection conn = null;
try {
conn = tunnelServiceClient.connect(getResource() + "/" + id, "POST", params, headers);
CompressOption option = compress ? conf.getCompressOption() : null;
vout = new VolumeOutputStream(conn, option);
} catch (IOException e) {
if (conn != null) {
conn.disconnect();
}
throw new TunnelException(e.getMessage(), e);
} catch (TunnelException e) {
throw e;
} catch (OdpsException e) {
if (conn != null) {
conn.disconnect();
}
throw new TunnelException(e.getMessage(), e);
}
return vout;
}
private void reload() throws TunnelException {
HashMap params = new HashMap();
HashMap headers = new HashMap();
headers.put(Headers.CONTENT_LENGTH, String.valueOf(0));
Connection conn = null;
try {
conn = tunnelServiceClient.connect(getResource() + "/" + id, "GET", params, headers);
Response resp = conn.getResponse();
if (resp.isOK()) {
loadFromJson(conn.getInputStream());
} else {
TunnelException e = new TunnelException(conn.getInputStream());
e.setRequestId(resp.getHeader(HttpHeaders.HEADER_ODPS_REQUEST_ID));
throw e;
}
} catch (IOException e) {
throw new TunnelException(e.getMessage(), e);
} catch (TunnelException e) {
throw e;
} catch (OdpsException e) {
throw new TunnelException(e.getMessage(), e);
} finally {
if (conn != null) {
try {
conn.disconnect();
} catch (IOException e) {
//
}
}
}
}
/**
* 提交本次上传的所有file
*
* @param files
* 已经成功上传的Files列表
* @throws com.aliyun.odps.tunnel.TunnelException
* 如果提供的file列表与Server端存在的file不一致抛出异常
*/
public void commit(String[] files) throws TunnelException, IOException {
if (files == null) {
throw new IllegalArgumentException("Invalid argument: files.");
}
List formatFiles = new ArrayList();
for (String fileId : files) {
formatFiles.add(formatFileName(fileId));
}
files = formatFiles.toArray(new String[0]);
HashMap clientFileMap = new HashMap();
for (String fileId : files) {
clientFileMap.put(fileId, true);
}
this.getStatus();
if (fileLists.size() != clientFileMap.size()) {
throw new TunnelException(
"File number not match, server: " + fileLists.size() + ", client: "
+ clientFileMap.size());
}
for (String fileId : files) {
if (!fileLists.containsKey(fileId)) {
throw new TunnelException("File not exits on server, file name is " + fileId);
}
}
completeUpload();
}
private String formatFileName(String fileName) throws TunnelException {
StringBuilder sb = new StringBuilder();
if (fileName.length() > 0 && fileName.charAt(0) == '/') {
throw new TunnelException("FileName cann't start with '/', file name is " + fileName);
}
int pos = 0;
boolean preSlash = false;
while (pos < fileName.length()) {
if (fileName.charAt(pos) == '/') {
if (!preSlash) {
sb.append(fileName.charAt(pos));
}
preSlash = true;
} else {
sb.append(fileName.charAt(pos));
preSlash = false;
}
pos++;
}
return sb.toString();
}
private void completeUpload() throws TunnelException, IOException {
HashMap params = new HashMap();
HashMap headers = new HashMap();
headers.put(Headers.CONTENT_LENGTH, String.valueOf(0));
int count = 0;
while (true) {
count++;
Connection conn = null;
try {
conn = tunnelServiceClient.connect(getResource() + "/" + id, "PUT", params, headers);
Response resp = conn.getResponse();
if (resp.isOK()) {
loadFromJson(conn.getInputStream());
break;
} else {
if (resp.getStatus() == HttpURLConnection.HTTP_INTERNAL_ERROR
&& count < 3) {
try {
Thread.sleep(2 * count * 1000);
} catch (InterruptedException e) {
throw new TunnelException(e.getMessage(), e);
}
continue;
}
throw new TunnelException(conn.getInputStream());
}
} catch (IOException e) {
throw new TunnelException(e.getMessage(), e);
} catch (TunnelException e) {
throw e;
} catch (OdpsException e) {
throw new TunnelException(e.getMessage(), e);
} finally {
if (conn != null) {
conn.disconnect();
}
}
}
}
/**
* 获取当前{@link UploadSession}的唯一标识符
*/
public String getId() {
return this.id;
}
/**
* 获取当前{@link UploadSession}的{@link Status}
*/
public UploadStatus getStatus() throws TunnelException {
reload();
return this.status;
}
/**
* 获取当前{@link UploadSession}已成功上传的files
*/
public String[] getFileList() throws TunnelException, IOException {
reload();
return fileLists.keySet().toArray(new String[0]);
}
/*
* 获取(@param fileName)在当前{@link UploadSession}已成功上传的长度
*
* @param fileName
* 指定File的名称。
*
* @throws TunnelException
*
*/
public Long getFileLength(String fileName) throws TunnelException, IOException {
fileName = formatFileName(fileName);
reload();
if (fileLists.containsKey(fileName)) {
return fileLists.get(fileName);
} else {
throw new TunnelException(fileName + " not exists in tunnel server");
}
}
private String getResource() {
StringBuilder sb = new StringBuilder();
sb.append("/projects/").append(projectName).append("/tunnel").append("/uploads");
return sb.toString();
}
/*
* Parse session properties from json stream.
*/
private void loadFromJson(InputStream is) throws TunnelException {
try {
String json = IOUtils.readStreamAsString(is);
JSONObject tree = JSONObject.parseObject(json);
// session id
String node = tree.getString("UploadID");
if (node != null) {
id = node;
}
// status
node = tree.getString("Status");
if (node != null) {
status = UploadStatus.valueOf(node.toUpperCase());
}
// fileList
fileLists.clear();
JSONArray node2 = tree.getJSONArray("FileList");
if (node2 != null) {
for (int i = 0; i < node2.size(); ++i) {
JSONObject fileNode = node2.getJSONObject(i);
String fileName = fileNode.getString("FileName");
Long fileLength = fileNode.getLong("FileLength");
fileLists.put(fileName, fileLength);
}
}
} catch (Exception e) {
throw new TunnelException("Invalid json content.", e);
}
}
}
/**
* 下载会话的状态
*
UNKNOWN 未知
*
NORMAL 正常
*
CLOSED 关闭
*
EXPIRED 过期
*/
public static enum DownloadStatus {
UNKNOWN, NORMAL, CLOSED, EXPIRED
}
/**
* 此类表示一个向ODPS中下载Volume的会话
*
*
* 向ODPS下载Volume的流程如下:
* 1) 创建DownloadSession
* 2) 下载数据
*
*/
public class DownloadSession {
private String id;
private String projectName;
private String volumeName;
private String partitionSpec;
private String fileName;
private long fileLength = (long) -1;
private DownloadStatus status = DownloadStatus.UNKNOWN;
private Configuration conf;
private RestClient tunnelServiceClient;
/**
* 构造一个新的{@link DownloadSession}。
*
* @param projectName
* 下载File所在project名称
* @param volumeName
* 下载File所在volume名称
* @param partitionSpec
* 下载File的partition描述，格式如下: pt=xxx,dt=xxx
* @param fileName
* 下载File的名称
*/
public DownloadSession(String projectName, String volumeName, String partitionSpec,
String fileName) throws TunnelException {
this.conf = VolumeTunnel.this.config;
this.projectName = projectName;
this.volumeName = volumeName;
this.partitionSpec = partitionSpec;
this.fileName = formatFileName(fileName);
tunnelServiceClient = conf.newRestClient(projectName);
initiate();
}
/**
* 根据已有downloadId构造一个{@link DownloadSession}对象。
*
* @param projectName
* 下载File所在project名称
* @param volumeName
* 下载File所在volume名称
* @param partitionSpec
* 下载File的partition描述，格式如下: pt=xxx,dt=xxx
* @param fileName
* 下载File的名称
* @param downloadId
* DownloadSession的唯一标识符
*/
public DownloadSession(String projectName, String volumeName, String partitionSpec,
String fileName, String downloadId)
throws TunnelException {
this.conf = VolumeTunnel.this.config;
this.projectName = projectName;
this.volumeName = volumeName;
this.partitionSpec = partitionSpec;
this.fileName = formatFileName(fileName);
this.id = downloadId;
tunnelServiceClient = conf.newRestClient(projectName);
reload();
//check if volumeName, partitionName and fileName consistent with downloadId.
if (!this.volumeName.equalsIgnoreCase(volumeName) ||
!this.partitionSpec.equalsIgnoreCase(partitionSpec) ||
!this.fileName.equalsIgnoreCase(fileName)) {
throw new TunnelException(
"volumeName, partitionName or fileName doesn't match whith downloadId.");
}
}
// initiate a new volume download session
private void initiate() throws TunnelException {
HashMap headers = new HashMap();
headers.put(Headers.CONTENT_LENGTH, String.valueOf(0));
HashMap params = new HashMap();
params.put(TunnelConstants.TYPE, "volumefile");
params.put(TunnelConstants.TARGET,
projectName + "/" + volumeName + "/" + partitionSpec + "/" + fileName);
Connection conn = null;
try {
conn = tunnelServiceClient.connect(getResource(), "POST", params, headers);
Response resp = conn.getResponse();
if (resp.isOK()) {
loadFromJson(conn.getInputStream());
} else {
TunnelException e = new TunnelException(conn.getInputStream());
e.setRequestId(resp.getHeader(HttpHeaders.HEADER_ODPS_REQUEST_ID));
throw e;
}
} catch (IOException e) {
throw new TunnelException("Failed to create download session with tunnel endpoint "
+ tunnelServiceClient.getEndpoint(), e);
} catch (TunnelException e) {
throw e;
} catch (OdpsException e) {
throw new TunnelException(e.getMessage(), e);
} finally {
if (conn != null) {
try {
conn.disconnect();
} catch (IOException e) {
// nothing
}
}
}
}
// reload volume download session properties
private void reload() throws TunnelException {
HashMap params = new HashMap();
HashMap headers = new HashMap();
headers.put(Headers.CONTENT_LENGTH, String.valueOf(0));
Connection conn = null;
try {
conn = tunnelServiceClient.connect(getResource() + "/" + id, "GET", params, headers);
Response resp = conn.getResponse();
if (resp.isOK()) {
loadFromJson(conn.getInputStream());
} else {
TunnelException e = new TunnelException(conn.getInputStream());
e.setRequestId(resp.getHeader(HttpHeaders.HEADER_ODPS_REQUEST_ID));
throw e;
}
} catch (IOException e) {
throw new TunnelException(e.getMessage(), e);
} catch (TunnelException e) {
throw e;
} catch (OdpsException e) {
throw new TunnelException(e.getMessage(), e);
} finally {
if (conn != null) {
try {
conn.disconnect();
} catch (IOException e) {
//
}
}
}
}
/**
* 创建{@link java.io.InputStream}用来将指定File以数据流的形式输出。
*/
public InputStream openInputStream() throws TunnelException, IOException {
return this.openInputStream(0, Long.MAX_VALUE, false);
}
/**
* 创建{@link java.io.InputStream}用来将指定File以数据流的形式输出。
*
* @param compress
* 压缩选项,即使设置了压缩选项，如果server
* 不支持压缩，传输数据也不会被压缩
*/
public InputStream openInputStream(boolean compress) throws TunnelException, IOException {
return this.openInputStream(0, Long.MAX_VALUE, compress);
}
/**
* 创建{@link java.io.InputStream}用来将指定File以数据流的形式输出。
*
* @param start
* 本次要读的起始位置。
* @param length
* 本次要读的字节数量。
*/
public InputStream openInputStream(long start, long length)
throws TunnelException, IOException {
return openInputStream(start, length, false);
}
/**
* 创建{@link java.io.InputStream}用来将指定File以数据流的形式输出。
*
* @param start
* 本次要读的起始位置。
* @param length
* 本次要读的字节数量。
* @param compress
* 压缩选项,即使设置了压缩选项，如果server
* 不支持压缩，传输数据也不会被压缩
*/
public InputStream openInputStream(long start, long length, boolean compress)
throws TunnelException, IOException {
HashMap params = new HashMap();
HashMap headers = new HashMap();
headers.put(Headers.CONTENT_LENGTH, String.valueOf(0));
headers.put(HttpHeaders.HEADER_ODPS_TUNNEL_VERSION,
String.valueOf(TunnelConstants.VERSION));
if (compress) {
if (conf.getCompressOption().algorithm
.equals(CompressOption.CompressAlgorithm.ODPS_ZLIB)) {
headers.put(Headers.ACCEPT_ENCODING, "deflate");
} else {
throw new TunnelException("invalid compression option.");
}
}
params.put("data", null);
params.put(TunnelConstants.RANGE, "(" + start + "," + length + ")");
VolumeInputStream vin = null;
Connection conn = null;
try {
conn = tunnelServiceClient.connect(getResource() + "/" + id, "GET", params, headers);
Response resp = conn.getResponse();
if (!resp.isOK()) {
TunnelException err = new TunnelException(conn.getInputStream());
err.setRequestId(resp.getHeader(HttpHeaders.HEADER_ODPS_REQUEST_ID));
throw new IOException(err);
}
String content_encoding = resp.getHeader(Headers.CONTENT_ENCODING);
if (content_encoding != null) {
if (resp.getHeader(Headers.CONTENT_ENCODING).equals("deflate")) {
conf.setCompressOption(new CompressOption(
CompressOption.CompressAlgorithm.ODPS_ZLIB, -1, 0));
} else {
throw new TunnelException("invalid content encoding");
}
compress = true;
} else {
compress = false;
}
CompressOption option = compress ? conf.getCompressOption() : null;
vin = new VolumeInputStream(conn, option);
} catch (IOException e) {
if (conn != null) {
conn.disconnect();
}
throw new TunnelException(e.getMessage(), e);
} catch (TunnelException e) {
throw e;
} catch (OdpsException e) {
if (conn != null) {
conn.disconnect();
}
throw new TunnelException(e.getMessage(), e);
}
return vin;
}
/**
* 获取当前{@link DownloadSession}操作的File的长度。
*/
public long getFileLength() {
return this.fileLength;
}
/**
* 获取当前{@link DownloadSession}的唯一标识符
*/
public String getId() {
return this.id;
}
/**
* 获取当前{@link DownloadSession}的{@link Status}
*/
public DownloadStatus getStatus() throws TunnelException, IOException {
reload();
return status;
}
private String getResource() {
StringBuilder sb = new StringBuilder();
sb.append("/projects/").append(this.projectName).append("/tunnel").append("/downloads");
return sb.toString();
}
private void loadFromJson(InputStream is) throws TunnelException {
try {
String json = IOUtils.readStreamAsString(is);
JSONObject tree = JSON.parseObject(json);
// session id
String node = tree.getString("DownloadID");
if (node != null) {
id = node;
}
// status
node = tree.getString("Status");
if (node != null) {
status = DownloadStatus.valueOf(node.toUpperCase());
}
// file
JSONObject node2 = tree.getJSONObject("File");
if (node2 != null) {
fileName = node2.getString("FileName");
fileLength = node2.getLong("FileLength");
}
// partition
node2 = tree.getJSONObject("Partition");
if (node2 != null) {
volumeName = node2.getString("Volume");
partitionSpec = node2.getString("Partition");
}
} catch (Exception e) {
throw new TunnelException("Invalid json content.", e);
}
}
private String formatFileName(String fileName) throws TunnelException {
StringBuilder sb = new StringBuilder();
if (fileName.length() > 0 && fileName.charAt(0) == '/') {
throw new TunnelException("FileName cann't start with '/', file name is " + fileName);
}
int pos = 0;
boolean preSlash = false;
while (pos < fileName.length()) {
if (fileName.charAt(pos) == '/') {
if (!preSlash) {
sb.append(fileName.charAt(pos));
}
preSlash = true;
} else {
sb.append(fileName.charAt(pos));
preSlash = false;
}
pos++;
}
return sb.toString();
}
}
}
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