1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
|
/*
* Copyright (C) 2015, Matthias Sohn <matthias.sohn@sap.com> and others
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Distribution License v. 1.0 which is available at
* https://www.eclipse.org/org/documents/edl-v10.php.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
package org.eclipse.jgit.lfs.server.fs;
import java.io.IOException;
import java.io.PrintWriter;
import java.text.MessageFormat;
import jakarta.servlet.AsyncContext;
import jakarta.servlet.ServletException;
import jakarta.servlet.annotation.WebServlet;
import jakarta.servlet.http.HttpServlet;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
import org.apache.http.HttpStatus;
import org.eclipse.jgit.lfs.errors.InvalidLongObjectIdException;
import org.eclipse.jgit.lfs.lib.AnyLongObjectId;
import org.eclipse.jgit.lfs.lib.Constants;
import org.eclipse.jgit.lfs.lib.LongObjectId;
import org.eclipse.jgit.lfs.server.internal.LfsGson;
import org.eclipse.jgit.lfs.server.internal.LfsServerText;
/**
* Servlet supporting upload and download of large objects as defined by the
* GitHub Large File Storage extension API extending git to allow separate
* storage of large files
* (https://github.com/github/git-lfs/tree/master/docs/api).
*
* @since 4.3
*/
@WebServlet(asyncSupported = true)
public class FileLfsServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
private final FileLfsRepository repository;
private final long timeout;
/**
* <p>Constructor for FileLfsServlet.</p>
*
* @param repository
* the repository storing the large objects
* @param timeout
* timeout for object upload / download in milliseconds
*/
public FileLfsServlet(FileLfsRepository repository, long timeout) {
this.repository = repository;
this.timeout = timeout;
}
/**
* {@inheritDoc}
*
* Handle object downloads
*/
@Override
protected void doGet(HttpServletRequest req,
HttpServletResponse rsp) throws ServletException, IOException {
AnyLongObjectId obj = getObjectToTransfer(req, rsp);
if (obj != null) {
if (repository.getSize(obj) == -1) {
sendError(rsp, HttpStatus.SC_NOT_FOUND, MessageFormat
.format(LfsServerText.get().objectNotFound,
obj.getName()));
return;
}
AsyncContext context = req.startAsync();
context.setTimeout(timeout);
rsp.getOutputStream()
.setWriteListener(new ObjectDownloadListener(repository,
context, rsp, obj));
}
}
/**
* Retrieve object id from request
*
* @param req
* servlet request
* @param rsp
* servlet response
* @return object id, or <code>null</code> if the object id could not be
* retrieved
* @throws java.io.IOException
* if an I/O error occurs
* @since 7.0
*/
protected AnyLongObjectId getObjectToTransfer(HttpServletRequest req,
HttpServletResponse rsp) throws IOException {
String info = req.getPathInfo();
int length = 1 + Constants.LONG_OBJECT_ID_STRING_LENGTH;
if (info.length() != length) {
sendError(rsp, HttpStatus.SC_UNPROCESSABLE_ENTITY, MessageFormat
.format(LfsServerText.get().invalidPathInfo, info));
return null;
}
try {
return LongObjectId.fromString(info.substring(1, length));
} catch (InvalidLongObjectIdException e) {
sendError(rsp, HttpStatus.SC_UNPROCESSABLE_ENTITY, e.getMessage());
return null;
}
}
/**
* {@inheritDoc}
*
* Handle object uploads
*/
@Override
protected void doPut(HttpServletRequest req,
HttpServletResponse rsp) throws ServletException, IOException {
AnyLongObjectId id = getObjectToTransfer(req, rsp);
if (id != null) {
AsyncContext context = req.startAsync();
context.setTimeout(timeout);
req.getInputStream().setReadListener(new ObjectUploadListener(
repository, context, req, rsp, id));
}
}
/**
* Send an error response.
*
* @param rsp
* the servlet response
* @param status
* HTTP status code
* @param message
* error message
* @throws java.io.IOException
* on failure to send the response
* @since 7.0
*/
protected static void sendError(HttpServletResponse rsp, int status, String message)
throws IOException {
if (rsp.isCommitted()) {
rsp.getOutputStream().close();
return;
}
rsp.reset();
rsp.setStatus(status);
try (PrintWriter writer = rsp.getWriter()) {
LfsGson.toJson(message, writer);
writer.flush();
}
rsp.flushBuffer();
}
}
|
