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48 package org.eclipse.jgit.transport;
49
50 import static org.eclipse.jgit.lib.RefDatabase.ALL;
51
52 import java.io.BufferedInputStream;
53 import java.io.IOException;
54 import java.io.InputStream;
55 import java.text.MessageFormat;
56 import java.util.ArrayList;
57 import java.util.Collection;
58 import java.util.Collections;
59 import java.util.HashMap;
60 import java.util.LinkedHashMap;
61 import java.util.List;
62 import java.util.Map;
63 import java.util.Set;
64
65 import org.eclipse.jgit.errors.MissingBundlePrerequisiteException;
66 import org.eclipse.jgit.errors.MissingObjectException;
67 import org.eclipse.jgit.errors.PackProtocolException;
68 import org.eclipse.jgit.errors.TransportException;
69 import org.eclipse.jgit.internal.JGitText;
70 import org.eclipse.jgit.internal.storage.file.PackLock;
71 import org.eclipse.jgit.lib.Constants;
72 import org.eclipse.jgit.lib.NullProgressMonitor;
73 import org.eclipse.jgit.lib.ObjectId;
74 import org.eclipse.jgit.lib.ObjectIdRef;
75 import org.eclipse.jgit.lib.ObjectInserter;
76 import org.eclipse.jgit.lib.ProgressMonitor;
77 import org.eclipse.jgit.lib.Ref;
78 import org.eclipse.jgit.revwalk.RevCommit;
79 import org.eclipse.jgit.revwalk.RevFlag;
80 import org.eclipse.jgit.revwalk.RevObject;
81 import org.eclipse.jgit.revwalk.RevWalk;
82 import org.eclipse.jgit.util.IO;
83 import org.eclipse.jgit.util.RawParseUtils;
84
85
86
87
88
89 class BundleFetchConnection extends BaseFetchConnection {
90
91 private final Transport transport;
92
93 InputStream bin;
94
95 final Map<ObjectId, String> prereqs = new HashMap<ObjectId, String>();
96
97 private String lockMessage;
98
99 private PackLock packLock;
100
101 BundleFetchConnection(Transport transportBundle, final InputStream src) throws TransportException {
102 transport = transportBundle;
103 bin = new BufferedInputStream(src);
104 try {
105 switch (readSignature()) {
106 case 2:
107 readBundleV2();
108 break;
109 default:
110 throw new TransportException(transport.uri, JGitText.get().notABundle);
111 }
112 } catch (TransportException err) {
113 close();
114 throw err;
115 } catch (IOException err) {
116 close();
117 throw new TransportException(transport.uri, err.getMessage(), err);
118 } catch (RuntimeException err) {
119 close();
120 throw new TransportException(transport.uri, err.getMessage(), err);
121 }
122 }
123
124 private int readSignature() throws IOException {
125 final String rev = readLine(new byte[1024]);
126 if (TransportBundle.V2_BUNDLE_SIGNATURE.equals(rev))
127 return 2;
128 throw new TransportException(transport.uri, JGitText.get().notABundle);
129 }
130
131 private void readBundleV2() throws IOException {
132 final byte[] hdrbuf = new byte[1024];
133 final LinkedHashMap<String, Ref> avail = new LinkedHashMap<String, Ref>();
134 for (;;) {
135 String line = readLine(hdrbuf);
136 if (line.length() == 0)
137 break;
138
139 if (line.charAt(0) == '-') {
140 ObjectId id = ObjectId.fromString(line.substring(1, 41));
141 String shortDesc = null;
142 if (line.length() > 42)
143 shortDesc = line.substring(42);
144 prereqs.put(id, shortDesc);
145 continue;
146 }
147
148 final String name = line.substring(41, line.length());
149 final ObjectId id = ObjectId.fromString(line.substring(0, 40));
150 final Ref prior = avail.put(name, new ObjectIdRef.Unpeeled(
151 Ref.Storage.NETWORK, name, id));
152 if (prior != null)
153 throw duplicateAdvertisement(name);
154 }
155 available(avail);
156 }
157
158 private PackProtocolException duplicateAdvertisement(final String name) {
159 return new PackProtocolException(transport.uri,
160 MessageFormat.format(JGitText.get().duplicateAdvertisementsOf, name));
161 }
162
163 private String readLine(final byte[] hdrbuf) throws IOException {
164 bin.mark(hdrbuf.length);
165 final int cnt = bin.read(hdrbuf);
166 int lf = 0;
167 while (lf < cnt && hdrbuf[lf] != '\n')
168 lf++;
169 bin.reset();
170 IO.skipFully(bin, lf);
171 if (lf < cnt && hdrbuf[lf] == '\n')
172 IO.skipFully(bin, 1);
173 return RawParseUtils.decode(Constants.CHARSET, hdrbuf, 0, lf);
174 }
175
176 public boolean didFetchTestConnectivity() {
177 return false;
178 }
179
180 @Override
181 protected void doFetch(final ProgressMonitor monitor,
182 final Collection<Ref> want, final Set<ObjectId> have)
183 throws TransportException {
184 verifyPrerequisites();
185 try {
186 try (ObjectInserter ins = transport.local.newObjectInserter()) {
187 PackParser parser = ins.newPackParser(bin);
188 parser.setAllowThin(true);
189 parser.setObjectChecker(transport.getObjectChecker());
190 parser.setLockMessage(lockMessage);
191 packLock = parser.parse(NullProgressMonitor.INSTANCE);
192 ins.flush();
193 }
194 } catch (IOException err) {
195 close();
196 throw new TransportException(transport.uri, err.getMessage(), err);
197 } catch (RuntimeException err) {
198 close();
199 throw new TransportException(transport.uri, err.getMessage(), err);
200 }
201 }
202
203 public void setPackLockMessage(final String message) {
204 lockMessage = message;
205 }
206
207 public Collection<PackLock> getPackLocks() {
208 if (packLock != null)
209 return Collections.singleton(packLock);
210 return Collections.<PackLock> emptyList();
211 }
212
213 private void verifyPrerequisites() throws TransportException {
214 if (prereqs.isEmpty())
215 return;
216
217 try (final RevWalk rw = new RevWalk(transport.local)) {
218 final RevFlag PREREQ = rw.newFlag("PREREQ");
219 final RevFlag SEEN = rw.newFlag("SEEN");
220
221 final Map<ObjectId, String> missing = new HashMap<ObjectId, String>();
222 final List<RevObject> commits = new ArrayList<RevObject>();
223 for (final Map.Entry<ObjectId, String> e : prereqs.entrySet()) {
224 ObjectId p = e.getKey();
225 try {
226 final RevCommit c = rw.parseCommit(p);
227 if (!c.has(PREREQ)) {
228 c.add(PREREQ);
229 commits.add(c);
230 }
231 } catch (MissingObjectException notFound) {
232 missing.put(p, e.getValue());
233 } catch (IOException err) {
234 throw new TransportException(transport.uri, MessageFormat
235 .format(JGitText.get().cannotReadCommit, p.name()),
236 err);
237 }
238 }
239 if (!missing.isEmpty())
240 throw new MissingBundlePrerequisiteException(transport.uri,
241 missing);
242
243 Map<String, Ref> localRefs;
244 try {
245 localRefs = transport.local.getRefDatabase().getRefs(ALL);
246 } catch (IOException e) {
247 throw new TransportException(transport.uri, e.getMessage(), e);
248 }
249 for (final Ref r : localRefs.values()) {
250 try {
251 rw.markStart(rw.parseCommit(r.getObjectId()));
252 } catch (IOException readError) {
253
254 }
255 }
256
257 int remaining = commits.size();
258 try {
259 RevCommit c;
260 while ((c = rw.next()) != null) {
261 if (c.has(PREREQ)) {
262 c.add(SEEN);
263 if (--remaining == 0)
264 break;
265 }
266 }
267 } catch (IOException err) {
268 throw new TransportException(transport.uri,
269 JGitText.get().cannotReadObject, err);
270 }
271
272 if (remaining > 0) {
273 for (final RevObject o : commits) {
274 if (!o.has(SEEN))
275 missing.put(o, prereqs.get(o));
276 }
277 throw new MissingBundlePrerequisiteException(transport.uri,
278 missing);
279 }
280 }
281 }
282
283 @Override
284 public void close() {
285 if (bin != null) {
286 try {
287 bin.close();
288 } catch (IOException ie) {
289
290 } finally {
291 bin = null;
292 }
293 }
294 }
295 }