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5f6b130d MV |
1 | // -*- mode: cpp; mode: fold -*- |
2 | // Description /*{{{*/ | |
3 | // $Id: mirror.cc,v 1.59 2004/05/08 19:42:35 mdz Exp $ | |
4 | /* ###################################################################### | |
5 | ||
6 | Mirror Aquire Method - This is the Mirror aquire method for APT. | |
7 | ||
8 | ##################################################################### */ | |
9 | /*}}}*/ | |
10 | // Include Files /*{{{*/ | |
ea542140 DK |
11 | #include <config.h> |
12 | ||
5f6b130d MV |
13 | #include <apt-pkg/fileutl.h> |
14 | #include <apt-pkg/acquire-method.h> | |
15 | #include <apt-pkg/acquire-item.h> | |
16 | #include <apt-pkg/acquire.h> | |
17 | #include <apt-pkg/error.h> | |
18 | #include <apt-pkg/hashes.h> | |
0c312e0e | 19 | #include <apt-pkg/sourcelist.h> |
5f6b130d | 20 | |
78c8f3cd | 21 | |
01a695e2 | 22 | #include <algorithm> |
78c8f3cd | 23 | #include <fstream> |
5f6b130d | 24 | #include <iostream> |
78c8f3cd | 25 | |
14e097c1 | 26 | #include <stdarg.h> |
d731f9c5 | 27 | #include <sys/stat.h> |
70288656 | 28 | #include <sys/types.h> |
78c8f3cd | 29 | #include <sys/utsname.h> |
70288656 | 30 | #include <dirent.h> |
14e097c1 | 31 | |
5f6b130d MV |
32 | using namespace std; |
33 | ||
0ded3ad3 MV |
34 | #include<sstream> |
35 | ||
5f6b130d MV |
36 | #include "mirror.h" |
37 | #include "http.h" | |
ea542140 | 38 | #include <apti18n.h> |
5f6b130d MV |
39 | /*}}}*/ |
40 | ||
362d2934 | 41 | /* Done: |
59271f62 | 42 | * - works with http (only!) |
362d2934 MV |
43 | * - always picks the first mirror from the list |
44 | * - call out to problem reporting script | |
45 | * - supports "deb mirror://host/path/to/mirror-list/// dist component" | |
a577a938 | 46 | * - uses pkgAcqMethod::FailReason() to have a string representation |
59271f62 | 47 | * of the failure that is also send to LP |
362d2934 | 48 | * |
86c17f0a | 49 | * TODO: |
d731f9c5 MV |
50 | * - deal with runing as non-root because we can't write to the lists |
51 | dir then -> use the cached mirror file | |
86c17f0a | 52 | * - better method to download than having a pkgAcquire interface here |
3f599bb7 | 53 | * and better error handling there! |
066b53e9 | 54 | * - support more than http |
86c17f0a | 55 | * - testing :) |
86c17f0a MV |
56 | */ |
57 | ||
5f6b130d | 58 | MirrorMethod::MirrorMethod() |
38eedeb7 | 59 | : HttpMethod(), DownloadedMirrorFile(false) |
5f6b130d | 60 | { |
5f6b130d MV |
61 | }; |
62 | ||
14e097c1 MV |
63 | // HttpMethod::Configuration - Handle a configuration message /*{{{*/ |
64 | // --------------------------------------------------------------------- | |
65 | /* We stash the desired pipeline depth */ | |
66 | bool MirrorMethod::Configuration(string Message) | |
67 | { | |
68 | if (pkgAcqMethod::Configuration(Message) == false) | |
69 | return false; | |
70 | Debug = _config->FindB("Debug::Acquire::mirror",false); | |
71 | ||
72 | return true; | |
73 | } | |
74 | /*}}}*/ | |
75 | ||
d731f9c5 | 76 | // clean the mirrors dir based on ttl information |
70288656 | 77 | bool MirrorMethod::Clean(string Dir) |
d731f9c5 | 78 | { |
0c312e0e MV |
79 | vector<metaIndex *>::const_iterator I; |
80 | ||
81 | if(Debug) | |
82 | clog << "MirrorMethod::Clean(): " << Dir << endl; | |
83 | ||
38eedeb7 MV |
84 | if(Dir == "/") |
85 | return _error->Error("will not clean: '/'"); | |
86 | ||
0c312e0e MV |
87 | // read sources.list |
88 | pkgSourceList list; | |
89 | list.ReadMainList(); | |
70288656 MV |
90 | |
91 | DIR *D = opendir(Dir.c_str()); | |
92 | if (D == 0) | |
93 | return _error->Errno("opendir",_("Unable to read %s"),Dir.c_str()); | |
94 | ||
95 | string StartDir = SafeGetCWD(); | |
96 | if (chdir(Dir.c_str()) != 0) | |
97 | { | |
98 | closedir(D); | |
99 | return _error->Errno("chdir",_("Unable to change to %s"),Dir.c_str()); | |
100 | } | |
101 | ||
102 | for (struct dirent *Dir = readdir(D); Dir != 0; Dir = readdir(D)) | |
103 | { | |
104 | // Skip some files.. | |
105 | if (strcmp(Dir->d_name,"lock") == 0 || | |
106 | strcmp(Dir->d_name,"partial") == 0 || | |
107 | strcmp(Dir->d_name,".") == 0 || | |
108 | strcmp(Dir->d_name,"..") == 0) | |
109 | continue; | |
0c312e0e MV |
110 | |
111 | // see if we have that uri | |
112 | for(I=list.begin(); I != list.end(); I++) | |
70288656 | 113 | { |
0c312e0e | 114 | string uri = (*I)->GetURI(); |
b86f6421 | 115 | if(uri.find("mirror://") != 0) |
0c312e0e | 116 | continue; |
066b53e9 | 117 | string BaseUri = uri.substr(0,uri.size()-1); |
0c312e0e MV |
118 | if (URItoFileName(BaseUri) == Dir->d_name) |
119 | break; | |
70288656 | 120 | } |
0c312e0e MV |
121 | // nothing found, nuke it |
122 | if (I == list.end()) | |
70288656 | 123 | unlink(Dir->d_name); |
70288656 | 124 | }; |
d731f9c5 | 125 | |
70288656 MV |
126 | chdir(StartDir.c_str()); |
127 | closedir(D); | |
128 | return true; | |
d731f9c5 MV |
129 | } |
130 | ||
14e097c1 | 131 | |
38eedeb7 MV |
132 | bool MirrorMethod::DownloadMirrorFile(string mirror_uri_str) |
133 | { | |
38eedeb7 MV |
134 | // not that great to use pkgAcquire here, but we do not have |
135 | // any other way right now | |
136 | string fetch = BaseUri; | |
137 | fetch.replace(0,strlen("mirror://"),"http://"); | |
138 | ||
6885f3de MV |
139 | // append the dist as a query string |
140 | if (Dist != "") | |
141 | fetch += "?dist=" + Dist; | |
142 | ||
d6cc7079 MV |
143 | if(Debug) |
144 | clog << "MirrorMethod::DownloadMirrorFile(): '" << fetch << "'" | |
145 | << " to " << MirrorFile << endl; | |
146 | ||
38eedeb7 MV |
147 | pkgAcquire Fetcher; |
148 | new pkgAcqFile(&Fetcher, fetch, "", 0, "", "", "", MirrorFile); | |
149 | bool res = (Fetcher.Run() == pkgAcquire::Continue); | |
83e6798e | 150 | if(res) { |
38eedeb7 | 151 | DownloadedMirrorFile = true; |
83e6798e MV |
152 | chmod(MirrorFile.c_str(), 0644); |
153 | } | |
38eedeb7 | 154 | Fetcher.Shutdown(); |
d6cc7079 MV |
155 | |
156 | if(Debug) | |
157 | clog << "MirrorMethod::DownloadMirrorFile() success: " << res << endl; | |
158 | ||
38eedeb7 MV |
159 | return res; |
160 | } | |
161 | ||
01a695e2 MV |
162 | // Randomizes the lines in the mirror file, this is used so that |
163 | // we spread the load on the mirrors evenly | |
164 | bool MirrorMethod::RandomizeMirrorFile(string mirror_file) | |
165 | { | |
166 | vector<string> content; | |
167 | string line; | |
168 | ||
0004842d MV |
169 | if (!FileExists(mirror_file)) |
170 | return false; | |
171 | ||
01a695e2 MV |
172 | // read |
173 | ifstream in(mirror_file.c_str()); | |
0190e315 | 174 | while ( !in.eof() ) { |
01a695e2 MV |
175 | getline(in, line); |
176 | content.push_back(line); | |
177 | } | |
178 | ||
78c8f3cd MV |
179 | // we want the file to be random for each different machine, but also |
180 | // "stable" on the same machine. this is to avoid running into out-of-sync | |
181 | // issues (i.e. Release/Release.gpg different on each mirror) | |
182 | struct utsname buf; | |
183 | int seed=1, i; | |
184 | if(uname(&buf) == 0) { | |
185 | for(i=0,seed=1; buf.nodename[i] != 0; i++) { | |
186 | seed = seed * 31 + buf.nodename[i]; | |
187 | } | |
188 | } | |
189 | srand( seed ); | |
01a695e2 MV |
190 | random_shuffle(content.begin(), content.end()); |
191 | ||
192 | // write | |
193 | ofstream out(mirror_file.c_str()); | |
194 | while ( !content.empty()) { | |
195 | line = content.back(); | |
196 | content.pop_back(); | |
197 | out << line << "\n"; | |
198 | } | |
199 | ||
200 | return true; | |
201 | } | |
202 | ||
03915427 MV |
203 | /* convert a the Queue->Uri back to the mirror base uri and look |
204 | * at all mirrors we have for this, this is needed as queue->uri | |
205 | * may point to different mirrors (if TryNextMirror() was run) | |
206 | */ | |
207 | void MirrorMethod::CurrentQueueUriToMirror() | |
208 | { | |
209 | // already in mirror:// style so nothing to do | |
210 | if(Queue->Uri.find("mirror://") == 0) | |
211 | return; | |
212 | ||
213 | // find current mirror and select next one | |
51561c4d DK |
214 | for (vector<string>::const_iterator mirror = AllMirrors.begin(); |
215 | mirror != AllMirrors.end(); ++mirror) | |
03915427 | 216 | { |
51561c4d | 217 | if (Queue->Uri.find(*mirror) == 0) |
03915427 | 218 | { |
51561c4d | 219 | Queue->Uri.replace(0, mirror->length(), BaseUri); |
03915427 MV |
220 | return; |
221 | } | |
222 | } | |
223 | _error->Error("Internal error: Failed to convert %s back to %s", | |
963b16dc | 224 | Queue->Uri.c_str(), BaseUri.c_str()); |
03915427 MV |
225 | } |
226 | ||
227 | bool MirrorMethod::TryNextMirror() | |
96db74ce | 228 | { |
03915427 | 229 | // find current mirror and select next one |
51561c4d DK |
230 | for (vector<string>::const_iterator mirror = AllMirrors.begin(); |
231 | mirror != AllMirrors.end(); ++mirror) | |
03915427 | 232 | { |
51561c4d DK |
233 | if (Queue->Uri.find(*mirror) != 0) |
234 | continue; | |
235 | ||
236 | vector<string>::const_iterator nextmirror = mirror + 1; | |
d6cc7079 | 237 | if (nextmirror == AllMirrors.end()) |
51561c4d DK |
238 | break; |
239 | Queue->Uri.replace(0, mirror->length(), *nextmirror); | |
240 | if (Debug) | |
241 | clog << "TryNextMirror: " << Queue->Uri << endl; | |
196fd136 MV |
242 | |
243 | // inform parent | |
244 | UsedMirror = *nextmirror; | |
245 | Log("Switching mirror"); | |
51561c4d | 246 | return true; |
03915427 MV |
247 | } |
248 | ||
963b16dc MV |
249 | if (Debug) |
250 | clog << "TryNextMirror could not find another mirror to try" << endl; | |
251 | ||
0ded3ad3 | 252 | return false; |
96db74ce MV |
253 | } |
254 | ||
255 | bool MirrorMethod::InitMirrors() | |
38eedeb7 MV |
256 | { |
257 | // if we do not have a MirrorFile, fallback | |
258 | if(!FileExists(MirrorFile)) | |
259 | { | |
260 | // FIXME: fallback to a default mirror here instead | |
261 | // and provide a config option to define that default | |
262 | return _error->Error(_("No mirror file '%s' found "), MirrorFile.c_str()); | |
263 | } | |
264 | ||
b46fb8ff MV |
265 | if (access(MirrorFile.c_str(), R_OK) != 0) |
266 | { | |
267 | // FIXME: fallback to a default mirror here instead | |
268 | // and provide a config option to define that default | |
269 | return _error->Error(_("Can not read mirror file '%s'"), MirrorFile.c_str()); | |
270 | } | |
271 | ||
38eedeb7 MV |
272 | // FIXME: make the mirror selection more clever, do not |
273 | // just use the first one! | |
274 | // BUT: we can not make this random, the mirror has to be | |
275 | // stable accross session, because otherwise we can | |
276 | // get into sync issues (got indexfiles from mirror A, | |
277 | // but packages from mirror B - one might be out of date etc) | |
278 | ifstream in(MirrorFile.c_str()); | |
96db74ce MV |
279 | string s; |
280 | while (!in.eof()) | |
281 | { | |
282 | getline(in, s); | |
95f395cc MV |
283 | |
284 | // ignore lines that start with # | |
285 | if (s.find("#") == 0) | |
286 | continue; | |
287 | // ignore empty lines | |
288 | if (s.size() == 0) | |
289 | continue; | |
290 | // ignore non http lines | |
291 | if (s.find("http://") != 0) | |
292 | continue; | |
293 | ||
294 | AllMirrors.push_back(s); | |
96db74ce | 295 | } |
03915427 MV |
296 | Mirror = AllMirrors[0]; |
297 | UsedMirror = Mirror; | |
38eedeb7 MV |
298 | return true; |
299 | } | |
300 | ||
301 | string MirrorMethod::GetMirrorFileName(string mirror_uri_str) | |
5f6b130d | 302 | { |
066b53e9 MV |
303 | /* |
304 | - a mirror_uri_str looks like this: | |
305 | mirror://people.ubuntu.com/~mvo/apt/mirror/mirrors/dists/feisty/Release.gpg | |
306 | ||
307 | - the matching source.list entry | |
308 | deb mirror://people.ubuntu.com/~mvo/apt/mirror/mirrors feisty main | |
309 | ||
310 | - we actually want to go after: | |
311 | http://people.ubuntu.com/~mvo/apt/mirror/mirrors | |
312 | ||
313 | And we need to save the BaseUri for later: | |
314 | - mirror://people.ubuntu.com/~mvo/apt/mirror/mirrors | |
315 | ||
316 | FIXME: what if we have two similar prefixes? | |
317 | mirror://people.ubuntu.com/~mvo/mirror | |
318 | mirror://people.ubuntu.com/~mvo/mirror2 | |
319 | then mirror_uri_str looks like: | |
320 | mirror://people.ubuntu.com/~mvo/apt/mirror/dists/feisty/Release.gpg | |
321 | mirror://people.ubuntu.com/~mvo/apt/mirror2/dists/feisty/Release.gpg | |
322 | we search sources.list and find: | |
323 | mirror://people.ubuntu.com/~mvo/apt/mirror | |
324 | in both cases! So we need to apply some domain knowledge here :( and | |
325 | check for /dists/ or /Release.gpg as suffixes | |
326 | */ | |
38eedeb7 | 327 | string name; |
f0b509cd | 328 | if(Debug) |
38eedeb7 | 329 | std::cerr << "GetMirrorFileName: " << mirror_uri_str << std::endl; |
066b53e9 MV |
330 | |
331 | // read sources.list and find match | |
332 | vector<metaIndex *>::const_iterator I; | |
333 | pkgSourceList list; | |
334 | list.ReadMainList(); | |
335 | for(I=list.begin(); I != list.end(); I++) | |
336 | { | |
337 | string uristr = (*I)->GetURI(); | |
f0b509cd MV |
338 | if(Debug) |
339 | std::cerr << "Checking: " << uristr << std::endl; | |
066b53e9 MV |
340 | if(uristr.substr(0,strlen("mirror://")) != string("mirror://")) |
341 | continue; | |
342 | // find matching uri in sources.list | |
343 | if(mirror_uri_str.substr(0,uristr.size()) == uristr) | |
344 | { | |
f0b509cd MV |
345 | if(Debug) |
346 | std::cerr << "found BaseURI: " << uristr << std::endl; | |
066b53e9 | 347 | BaseUri = uristr.substr(0,uristr.size()-1); |
6885f3de | 348 | Dist = (*I)->GetDist(); |
066b53e9 MV |
349 | } |
350 | } | |
70288656 | 351 | // get new file |
38eedeb7 | 352 | name = _config->FindDir("Dir::State::mirrors") + URItoFileName(BaseUri); |
5f6b130d | 353 | |
14e097c1 MV |
354 | if(Debug) |
355 | { | |
356 | cerr << "base-uri: " << BaseUri << endl; | |
38eedeb7 | 357 | cerr << "mirror-file: " << name << endl; |
d731f9c5 | 358 | } |
38eedeb7 | 359 | return name; |
5f6b130d MV |
360 | } |
361 | ||
362 | // MirrorMethod::Fetch - Fetch an item /*{{{*/ | |
363 | // --------------------------------------------------------------------- | |
364 | /* This adds an item to the pipeline. We keep the pipeline at a fixed | |
365 | depth. */ | |
366 | bool MirrorMethod::Fetch(FetchItem *Itm) | |
367 | { | |
5dad4134 MV |
368 | if(Debug) |
369 | clog << "MirrorMethod::Fetch()" << endl; | |
370 | ||
38eedeb7 MV |
371 | // the http method uses Fetch(0) as a way to update the pipeline, |
372 | // just let it do its work in this case - Fetch() with a valid | |
373 | // Itm will always run before the first Fetch(0) | |
374 | if(Itm == NULL) | |
375 | return HttpMethod::Fetch(Itm); | |
376 | ||
377 | // if we don't have the name of the mirror file on disk yet, | |
378 | // calculate it now (can be derived from the uri) | |
379 | if(MirrorFile.empty()) | |
380 | MirrorFile = GetMirrorFileName(Itm->Uri); | |
381 | ||
382 | // download mirror file once (if we are after index files) | |
383 | if(Itm->IndexFile && !DownloadedMirrorFile) | |
5f6b130d | 384 | { |
70288656 | 385 | Clean(_config->FindDir("Dir::State::mirrors")); |
0004842d MV |
386 | if (DownloadMirrorFile(Itm->Uri)) |
387 | RandomizeMirrorFile(MirrorFile); | |
5f6b130d MV |
388 | } |
389 | ||
2ac9b90b | 390 | if(AllMirrors.empty()) { |
96db74ce | 391 | if(!InitMirrors()) { |
5dad4134 MV |
392 | // no valid mirror selected, something went wrong downloading |
393 | // from the master mirror site most likely and there is | |
394 | // no old mirror file availalbe | |
395 | return false; | |
396 | } | |
397 | } | |
5dad4134 | 398 | |
963b16dc MV |
399 | if(Itm->Uri.find("mirror://") != string::npos) |
400 | Itm->Uri.replace(0,BaseUri.size(), Mirror); | |
38eedeb7 | 401 | |
963b16dc MV |
402 | if(Debug) |
403 | clog << "Fetch: " << Itm->Uri << endl << endl; | |
38eedeb7 | 404 | |
14e097c1 MV |
405 | // now run the real fetcher |
406 | return HttpMethod::Fetch(Itm); | |
5f6b130d MV |
407 | }; |
408 | ||
14e097c1 MV |
409 | void MirrorMethod::Fail(string Err,bool Transient) |
410 | { | |
2ac9b90b MV |
411 | // FIXME: TryNextMirror is not ideal for indexfile as we may |
412 | // run into auth issues | |
413 | ||
414 | if (Debug) | |
415 | clog << "Failure to get " << Queue->Uri << endl; | |
416 | ||
417 | // try the next mirror on fail (if its not a expected failure, | |
418 | // e.g. translations are ok to ignore) | |
963b16dc | 419 | if (!Queue->FailIgnore && TryNextMirror()) |
483dfdd8 | 420 | return; |
483dfdd8 MV |
421 | |
422 | // all mirrors failed, so bail out | |
0ded3ad3 MV |
423 | string s; |
424 | strprintf(s, _("[Mirror: %s]"), Mirror.c_str()); | |
425 | SetIP(s); | |
426 | ||
03915427 | 427 | CurrentQueueUriToMirror(); |
14e097c1 MV |
428 | pkgAcqMethod::Fail(Err, Transient); |
429 | } | |
430 | ||
431 | void MirrorMethod::URIStart(FetchResult &Res) | |
432 | { | |
03915427 | 433 | CurrentQueueUriToMirror(); |
14e097c1 MV |
434 | pkgAcqMethod::URIStart(Res); |
435 | } | |
436 | ||
437 | void MirrorMethod::URIDone(FetchResult &Res,FetchResult *Alt) | |
438 | { | |
03915427 | 439 | CurrentQueueUriToMirror(); |
14e097c1 MV |
440 | pkgAcqMethod::URIDone(Res, Alt); |
441 | } | |
442 | ||
443 | ||
5f6b130d MV |
444 | int main() |
445 | { | |
446 | setlocale(LC_ALL, ""); | |
447 | ||
448 | MirrorMethod Mth; | |
449 | ||
14e097c1 | 450 | return Mth.Loop(); |
5f6b130d MV |
451 | } |
452 | ||
453 |