]>
Commit | Line | Data |
---|---|---|
7b17a7d7 LP |
1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
2 | ||
3 | /*** | |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2012 Lennart Poettering | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
9 | under the terms of the GNU Lesser General Public License as published by | |
10 | the Free Software Foundation; either version 2.1 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
13 | systemd is distributed in the hope that it will be useful, but | |
14 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | Lesser General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU Lesser General Public License | |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
20 | ***/ | |
21 | ||
22 | #include <stdlib.h> | |
23 | #include <string.h> | |
24 | #include <unistd.h> | |
25 | #include <fcntl.h> | |
858634ff | 26 | #include <getopt.h> |
7b17a7d7 LP |
27 | |
28 | #include <microhttpd.h> | |
29 | ||
30 | #include "log.h" | |
31 | #include "util.h" | |
32 | #include "sd-journal.h" | |
33 | #include "sd-daemon.h" | |
a7edaadd | 34 | #include "sd-bus.h" |
40ca29a1 | 35 | #include "bus-util.h" |
7b17a7d7 | 36 | #include "logs-show.h" |
e64690a8 | 37 | #include "microhttpd-util.h" |
858634ff | 38 | #include "build.h" |
a860325e | 39 | #include "fileio.h" |
7b17a7d7 LP |
40 | |
41 | typedef struct RequestMeta { | |
42 | sd_journal *journal; | |
43 | ||
44 | OutputMode mode; | |
45 | ||
46 | char *cursor; | |
47 | int64_t n_skip; | |
48 | uint64_t n_entries; | |
49 | bool n_entries_set; | |
50 | ||
51 | FILE *tmp; | |
52 | uint64_t delta, size; | |
98206c93 LP |
53 | |
54 | int argument_parse_error; | |
7a69007a LP |
55 | |
56 | bool follow; | |
c6511e85 | 57 | bool discrete; |
240a5fe8 LP |
58 | |
59 | uint64_t n_fields; | |
60 | bool n_fields_set; | |
7b17a7d7 LP |
61 | } RequestMeta; |
62 | ||
63 | static const char* const mime_types[_OUTPUT_MODE_MAX] = { | |
64 | [OUTPUT_SHORT] = "text/plain", | |
65 | [OUTPUT_JSON] = "application/json", | |
48383c25 LP |
66 | [OUTPUT_JSON_SSE] = "text/event-stream", |
67 | [OUTPUT_EXPORT] = "application/vnd.fdo.journal", | |
7b17a7d7 LP |
68 | }; |
69 | ||
70 | static RequestMeta *request_meta(void **connection_cls) { | |
71 | RequestMeta *m; | |
72 | ||
73 | if (*connection_cls) | |
74 | return *connection_cls; | |
75 | ||
76 | m = new0(RequestMeta, 1); | |
77 | if (!m) | |
78 | return NULL; | |
79 | ||
80 | *connection_cls = m; | |
81 | return m; | |
82 | } | |
83 | ||
84 | static void request_meta_free( | |
85 | void *cls, | |
86 | struct MHD_Connection *connection, | |
87 | void **connection_cls, | |
88 | enum MHD_RequestTerminationCode toe) { | |
89 | ||
90 | RequestMeta *m = *connection_cls; | |
91 | ||
92 | if (!m) | |
93 | return; | |
94 | ||
95 | if (m->journal) | |
96 | sd_journal_close(m->journal); | |
97 | ||
98 | if (m->tmp) | |
99 | fclose(m->tmp); | |
100 | ||
101 | free(m->cursor); | |
102 | free(m); | |
103 | } | |
104 | ||
105 | static int open_journal(RequestMeta *m) { | |
106 | assert(m); | |
107 | ||
108 | if (m->journal) | |
109 | return 0; | |
110 | ||
a688baa8 | 111 | return sd_journal_open(&m->journal, SD_JOURNAL_LOCAL_ONLY|SD_JOURNAL_SYSTEM); |
7b17a7d7 LP |
112 | } |
113 | ||
9775033d | 114 | static int respond_oom_internal(struct MHD_Connection *connection) { |
7b17a7d7 LP |
115 | struct MHD_Response *response; |
116 | const char m[] = "Out of memory.\n"; | |
117 | int ret; | |
118 | ||
119 | assert(connection); | |
120 | ||
121 | response = MHD_create_response_from_buffer(sizeof(m)-1, (char*) m, MHD_RESPMEM_PERSISTENT); | |
122 | if (!response) | |
123 | return MHD_NO; | |
124 | ||
125 | MHD_add_response_header(response, "Content-Type", "text/plain"); | |
126 | ret = MHD_queue_response(connection, MHD_HTTP_SERVICE_UNAVAILABLE, response); | |
127 | MHD_destroy_response(response); | |
128 | ||
129 | return ret; | |
130 | } | |
131 | ||
9775033d ZJS |
132 | #define respond_oom(connection) log_oom(), respond_oom_internal(connection) |
133 | ||
7b17a7d7 LP |
134 | static int respond_error( |
135 | struct MHD_Connection *connection, | |
136 | unsigned code, | |
137 | const char *format, ...) { | |
138 | ||
139 | struct MHD_Response *response; | |
140 | char *m; | |
141 | int r; | |
142 | va_list ap; | |
143 | ||
144 | assert(connection); | |
145 | assert(format); | |
146 | ||
147 | va_start(ap, format); | |
148 | r = vasprintf(&m, format, ap); | |
149 | va_end(ap); | |
150 | ||
151 | if (r < 0) | |
152 | return respond_oom(connection); | |
153 | ||
154 | response = MHD_create_response_from_buffer(strlen(m), m, MHD_RESPMEM_MUST_FREE); | |
155 | if (!response) { | |
156 | free(m); | |
157 | return respond_oom(connection); | |
158 | } | |
159 | ||
160 | MHD_add_response_header(response, "Content-Type", "text/plain"); | |
161 | r = MHD_queue_response(connection, code, response); | |
162 | MHD_destroy_response(response); | |
163 | ||
164 | return r; | |
165 | } | |
166 | ||
167 | static ssize_t request_reader_entries( | |
168 | void *cls, | |
169 | uint64_t pos, | |
170 | char *buf, | |
171 | size_t max) { | |
172 | ||
173 | RequestMeta *m = cls; | |
174 | int r; | |
175 | size_t n, k; | |
176 | ||
177 | assert(m); | |
178 | assert(buf); | |
179 | assert(max > 0); | |
180 | assert(pos >= m->delta); | |
181 | ||
182 | pos -= m->delta; | |
183 | ||
184 | while (pos >= m->size) { | |
185 | off_t sz; | |
186 | ||
187 | /* End of this entry, so let's serialize the next | |
188 | * one */ | |
189 | ||
190 | if (m->n_entries_set && | |
191 | m->n_entries <= 0) | |
192 | return MHD_CONTENT_READER_END_OF_STREAM; | |
193 | ||
77ad3b93 LP |
194 | if (m->n_skip < 0) |
195 | r = sd_journal_previous_skip(m->journal, (uint64_t) -m->n_skip + 1); | |
196 | else if (m->n_skip > 0) | |
7b17a7d7 LP |
197 | r = sd_journal_next_skip(m->journal, (uint64_t) m->n_skip + 1); |
198 | else | |
199 | r = sd_journal_next(m->journal); | |
200 | ||
201 | if (r < 0) { | |
202 | log_error("Failed to advance journal pointer: %s", strerror(-r)); | |
203 | return MHD_CONTENT_READER_END_WITH_ERROR; | |
7a69007a LP |
204 | } else if (r == 0) { |
205 | ||
206 | if (m->follow) { | |
207 | r = sd_journal_wait(m->journal, (uint64_t) -1); | |
208 | if (r < 0) { | |
209 | log_error("Couldn't wait for journal event: %s", strerror(-r)); | |
210 | return MHD_CONTENT_READER_END_WITH_ERROR; | |
211 | } | |
212 | ||
213 | continue; | |
214 | } | |
215 | ||
7b17a7d7 | 216 | return MHD_CONTENT_READER_END_OF_STREAM; |
7a69007a | 217 | } |
7b17a7d7 | 218 | |
c6511e85 LP |
219 | if (m->discrete) { |
220 | assert(m->cursor); | |
221 | ||
222 | r = sd_journal_test_cursor(m->journal, m->cursor); | |
223 | if (r < 0) { | |
224 | log_error("Failed to test cursor: %s", strerror(-r)); | |
225 | return MHD_CONTENT_READER_END_WITH_ERROR; | |
226 | } | |
227 | ||
228 | if (r == 0) | |
229 | return MHD_CONTENT_READER_END_OF_STREAM; | |
230 | } | |
231 | ||
7b17a7d7 LP |
232 | pos -= m->size; |
233 | m->delta += m->size; | |
234 | ||
235 | if (m->n_entries_set) | |
236 | m->n_entries -= 1; | |
237 | ||
238 | m->n_skip = 0; | |
239 | ||
240 | if (m->tmp) | |
241 | rewind(m->tmp); | |
242 | else { | |
243 | m->tmp = tmpfile(); | |
244 | if (!m->tmp) { | |
245 | log_error("Failed to create temporary file: %m"); | |
33b40551 | 246 | return MHD_CONTENT_READER_END_WITH_ERROR; |
7b17a7d7 LP |
247 | } |
248 | } | |
249 | ||
94e0bd7d | 250 | r = output_journal(m->tmp, m->journal, m->mode, 0, OUTPUT_FULL_WIDTH, NULL); |
7b17a7d7 LP |
251 | if (r < 0) { |
252 | log_error("Failed to serialize item: %s", strerror(-r)); | |
253 | return MHD_CONTENT_READER_END_WITH_ERROR; | |
254 | } | |
255 | ||
256 | sz = ftello(m->tmp); | |
257 | if (sz == (off_t) -1) { | |
258 | log_error("Failed to retrieve file position: %m"); | |
259 | return MHD_CONTENT_READER_END_WITH_ERROR; | |
260 | } | |
261 | ||
262 | m->size = (uint64_t) sz; | |
263 | } | |
264 | ||
265 | if (fseeko(m->tmp, pos, SEEK_SET) < 0) { | |
266 | log_error("Failed to seek to position: %m"); | |
267 | return MHD_CONTENT_READER_END_WITH_ERROR; | |
268 | } | |
269 | ||
270 | n = m->size - pos; | |
271 | if (n > max) | |
272 | n = max; | |
273 | ||
274 | errno = 0; | |
275 | k = fread(buf, 1, n, m->tmp); | |
276 | if (k != n) { | |
277 | log_error("Failed to read from file: %s", errno ? strerror(errno) : "Premature EOF"); | |
278 | return MHD_CONTENT_READER_END_WITH_ERROR; | |
279 | } | |
280 | ||
281 | return (ssize_t) k; | |
282 | } | |
283 | ||
284 | static int request_parse_accept( | |
285 | RequestMeta *m, | |
286 | struct MHD_Connection *connection) { | |
287 | ||
6374a73b | 288 | const char *header; |
7b17a7d7 LP |
289 | |
290 | assert(m); | |
291 | assert(connection); | |
292 | ||
6374a73b ZJS |
293 | header = MHD_lookup_connection_value(connection, MHD_HEADER_KIND, "Accept"); |
294 | if (!header) | |
7b17a7d7 LP |
295 | return 0; |
296 | ||
6374a73b | 297 | if (streq(header, mime_types[OUTPUT_JSON])) |
7b17a7d7 | 298 | m->mode = OUTPUT_JSON; |
6374a73b | 299 | else if (streq(header, mime_types[OUTPUT_JSON_SSE])) |
48383c25 | 300 | m->mode = OUTPUT_JSON_SSE; |
6374a73b | 301 | else if (streq(header, mime_types[OUTPUT_EXPORT])) |
7b17a7d7 LP |
302 | m->mode = OUTPUT_EXPORT; |
303 | else | |
304 | m->mode = OUTPUT_SHORT; | |
305 | ||
306 | return 0; | |
307 | } | |
308 | ||
309 | static int request_parse_range( | |
310 | RequestMeta *m, | |
311 | struct MHD_Connection *connection) { | |
312 | ||
313 | const char *range, *colon, *colon2; | |
314 | int r; | |
315 | ||
316 | assert(m); | |
317 | assert(connection); | |
318 | ||
319 | range = MHD_lookup_connection_value(connection, MHD_HEADER_KIND, "Range"); | |
320 | if (!range) | |
321 | return 0; | |
322 | ||
323 | if (!startswith(range, "entries=")) | |
324 | return 0; | |
325 | ||
326 | range += 8; | |
327 | range += strspn(range, WHITESPACE); | |
328 | ||
329 | colon = strchr(range, ':'); | |
330 | if (!colon) | |
331 | m->cursor = strdup(range); | |
332 | else { | |
333 | const char *p; | |
334 | ||
335 | colon2 = strchr(colon + 1, ':'); | |
336 | if (colon2) { | |
7fd1b19b | 337 | _cleanup_free_ char *t; |
7b17a7d7 LP |
338 | |
339 | t = strndup(colon + 1, colon2 - colon - 1); | |
340 | if (!t) | |
341 | return -ENOMEM; | |
342 | ||
343 | r = safe_atoi64(t, &m->n_skip); | |
7b17a7d7 LP |
344 | if (r < 0) |
345 | return r; | |
346 | } | |
347 | ||
348 | p = (colon2 ? colon2 : colon) + 1; | |
349 | if (*p) { | |
350 | r = safe_atou64(p, &m->n_entries); | |
351 | if (r < 0) | |
352 | return r; | |
353 | ||
354 | if (m->n_entries <= 0) | |
355 | return -EINVAL; | |
356 | ||
357 | m->n_entries_set = true; | |
358 | } | |
359 | ||
360 | m->cursor = strndup(range, colon - range); | |
361 | } | |
362 | ||
363 | if (!m->cursor) | |
364 | return -ENOMEM; | |
365 | ||
366 | m->cursor[strcspn(m->cursor, WHITESPACE)] = 0; | |
367 | if (isempty(m->cursor)) { | |
368 | free(m->cursor); | |
369 | m->cursor = NULL; | |
370 | } | |
371 | ||
372 | return 0; | |
373 | } | |
374 | ||
98206c93 LP |
375 | static int request_parse_arguments_iterator( |
376 | void *cls, | |
377 | enum MHD_ValueKind kind, | |
378 | const char *key, | |
379 | const char *value) { | |
380 | ||
381 | RequestMeta *m = cls; | |
382 | _cleanup_free_ char *p = NULL; | |
383 | int r; | |
384 | ||
385 | assert(m); | |
386 | ||
387 | if (isempty(key)) { | |
388 | m->argument_parse_error = -EINVAL; | |
389 | return MHD_NO; | |
390 | } | |
391 | ||
7a69007a LP |
392 | if (streq(key, "follow")) { |
393 | if (isempty(value)) { | |
394 | m->follow = true; | |
395 | return MHD_YES; | |
396 | } | |
397 | ||
398 | r = parse_boolean(value); | |
399 | if (r < 0) { | |
400 | m->argument_parse_error = r; | |
401 | return MHD_NO; | |
402 | } | |
403 | ||
404 | m->follow = r; | |
405 | return MHD_YES; | |
406 | } | |
407 | ||
c6511e85 LP |
408 | if (streq(key, "discrete")) { |
409 | if (isempty(value)) { | |
410 | m->discrete = true; | |
411 | return MHD_YES; | |
412 | } | |
413 | ||
414 | r = parse_boolean(value); | |
415 | if (r < 0) { | |
416 | m->argument_parse_error = r; | |
417 | return MHD_NO; | |
418 | } | |
419 | ||
420 | m->discrete = r; | |
421 | return MHD_YES; | |
422 | } | |
423 | ||
082d0180 LP |
424 | if (streq(key, "boot")) { |
425 | if (isempty(value)) | |
426 | r = true; | |
427 | else { | |
428 | r = parse_boolean(value); | |
429 | if (r < 0) { | |
430 | m->argument_parse_error = r; | |
431 | return MHD_NO; | |
432 | } | |
433 | } | |
434 | ||
435 | if (r) { | |
436 | char match[9 + 32 + 1] = "_BOOT_ID="; | |
437 | sd_id128_t bid; | |
438 | ||
439 | r = sd_id128_get_boot(&bid); | |
440 | if (r < 0) { | |
441 | log_error("Failed to get boot ID: %s", strerror(-r)); | |
442 | return MHD_NO; | |
443 | } | |
444 | ||
445 | sd_id128_to_string(bid, match + 9); | |
446 | r = sd_journal_add_match(m->journal, match, sizeof(match)-1); | |
447 | if (r < 0) { | |
448 | m->argument_parse_error = r; | |
449 | return MHD_NO; | |
450 | } | |
451 | } | |
452 | ||
453 | return MHD_YES; | |
454 | } | |
455 | ||
98206c93 LP |
456 | p = strjoin(key, "=", strempty(value), NULL); |
457 | if (!p) { | |
458 | m->argument_parse_error = log_oom(); | |
459 | return MHD_NO; | |
460 | } | |
461 | ||
462 | r = sd_journal_add_match(m->journal, p, 0); | |
463 | if (r < 0) { | |
464 | m->argument_parse_error = r; | |
465 | return MHD_NO; | |
466 | } | |
467 | ||
468 | return MHD_YES; | |
469 | } | |
470 | ||
471 | static int request_parse_arguments( | |
472 | RequestMeta *m, | |
473 | struct MHD_Connection *connection) { | |
474 | ||
475 | assert(m); | |
476 | assert(connection); | |
477 | ||
478 | m->argument_parse_error = 0; | |
479 | MHD_get_connection_values(connection, MHD_GET_ARGUMENT_KIND, request_parse_arguments_iterator, m); | |
480 | ||
481 | return m->argument_parse_error; | |
482 | } | |
483 | ||
7b17a7d7 LP |
484 | static int request_handler_entries( |
485 | struct MHD_Connection *connection, | |
8530a143 | 486 | void *connection_cls) { |
7b17a7d7 LP |
487 | |
488 | struct MHD_Response *response; | |
8530a143 | 489 | RequestMeta *m = connection_cls; |
7b17a7d7 LP |
490 | int r; |
491 | ||
492 | assert(connection); | |
8530a143 | 493 | assert(m); |
7b17a7d7 LP |
494 | |
495 | r = open_journal(m); | |
496 | if (r < 0) | |
497 | return respond_error(connection, MHD_HTTP_INTERNAL_SERVER_ERROR, "Failed to open journal: %s\n", strerror(-r)); | |
498 | ||
499 | if (request_parse_accept(m, connection) < 0) | |
500 | return respond_error(connection, MHD_HTTP_BAD_REQUEST, "Failed to parse Accept header.\n"); | |
501 | ||
502 | if (request_parse_range(m, connection) < 0) | |
503 | return respond_error(connection, MHD_HTTP_BAD_REQUEST, "Failed to parse Range header.\n"); | |
504 | ||
98206c93 LP |
505 | if (request_parse_arguments(m, connection) < 0) |
506 | return respond_error(connection, MHD_HTTP_BAD_REQUEST, "Failed to parse URL arguments.\n"); | |
507 | ||
c6511e85 LP |
508 | if (m->discrete) { |
509 | if (!m->cursor) | |
510 | return respond_error(connection, MHD_HTTP_BAD_REQUEST, "Discrete seeks require a cursor specification.\n"); | |
511 | ||
512 | m->n_entries = 1; | |
513 | m->n_entries_set = true; | |
514 | } | |
515 | ||
7b17a7d7 LP |
516 | if (m->cursor) |
517 | r = sd_journal_seek_cursor(m->journal, m->cursor); | |
518 | else if (m->n_skip >= 0) | |
519 | r = sd_journal_seek_head(m->journal); | |
520 | else if (m->n_skip < 0) | |
521 | r = sd_journal_seek_tail(m->journal); | |
522 | if (r < 0) | |
523 | return respond_error(connection, MHD_HTTP_BAD_REQUEST, "Failed to seek in journal.\n"); | |
524 | ||
525 | response = MHD_create_response_from_callback(MHD_SIZE_UNKNOWN, 4*1024, request_reader_entries, m, NULL); | |
526 | if (!response) | |
527 | return respond_oom(connection); | |
528 | ||
529 | MHD_add_response_header(response, "Content-Type", mime_types[m->mode]); | |
530 | ||
531 | r = MHD_queue_response(connection, MHD_HTTP_OK, response); | |
532 | MHD_destroy_response(response); | |
533 | ||
534 | return r; | |
535 | } | |
536 | ||
240a5fe8 LP |
537 | static int output_field(FILE *f, OutputMode m, const char *d, size_t l) { |
538 | const char *eq; | |
539 | size_t j; | |
540 | ||
541 | eq = memchr(d, '=', l); | |
542 | if (!eq) | |
543 | return -EINVAL; | |
544 | ||
545 | j = l - (eq - d + 1); | |
546 | ||
547 | if (m == OUTPUT_JSON) { | |
548 | fprintf(f, "{ \"%.*s\" : ", (int) (eq - d), d); | |
549 | json_escape(f, eq+1, j, OUTPUT_FULL_WIDTH); | |
550 | fputs(" }\n", f); | |
551 | } else { | |
552 | fwrite(eq+1, 1, j, f); | |
553 | fputc('\n', f); | |
554 | } | |
555 | ||
556 | return 0; | |
557 | } | |
558 | ||
559 | static ssize_t request_reader_fields( | |
560 | void *cls, | |
561 | uint64_t pos, | |
562 | char *buf, | |
563 | size_t max) { | |
564 | ||
565 | RequestMeta *m = cls; | |
566 | int r; | |
567 | size_t n, k; | |
568 | ||
569 | assert(m); | |
570 | assert(buf); | |
571 | assert(max > 0); | |
572 | assert(pos >= m->delta); | |
573 | ||
574 | pos -= m->delta; | |
575 | ||
576 | while (pos >= m->size) { | |
577 | off_t sz; | |
578 | const void *d; | |
579 | size_t l; | |
580 | ||
581 | /* End of this field, so let's serialize the next | |
582 | * one */ | |
583 | ||
584 | if (m->n_fields_set && | |
585 | m->n_fields <= 0) | |
586 | return MHD_CONTENT_READER_END_OF_STREAM; | |
587 | ||
588 | r = sd_journal_enumerate_unique(m->journal, &d, &l); | |
589 | if (r < 0) { | |
590 | log_error("Failed to advance field index: %s", strerror(-r)); | |
591 | return MHD_CONTENT_READER_END_WITH_ERROR; | |
592 | } else if (r == 0) | |
593 | return MHD_CONTENT_READER_END_OF_STREAM; | |
594 | ||
595 | pos -= m->size; | |
596 | m->delta += m->size; | |
597 | ||
598 | if (m->n_fields_set) | |
599 | m->n_fields -= 1; | |
600 | ||
601 | if (m->tmp) | |
602 | rewind(m->tmp); | |
603 | else { | |
604 | m->tmp = tmpfile(); | |
605 | if (!m->tmp) { | |
606 | log_error("Failed to create temporary file: %m"); | |
33b40551 | 607 | return MHD_CONTENT_READER_END_WITH_ERROR; |
240a5fe8 LP |
608 | } |
609 | } | |
610 | ||
611 | r = output_field(m->tmp, m->mode, d, l); | |
612 | if (r < 0) { | |
613 | log_error("Failed to serialize item: %s", strerror(-r)); | |
614 | return MHD_CONTENT_READER_END_WITH_ERROR; | |
615 | } | |
616 | ||
617 | sz = ftello(m->tmp); | |
618 | if (sz == (off_t) -1) { | |
619 | log_error("Failed to retrieve file position: %m"); | |
620 | return MHD_CONTENT_READER_END_WITH_ERROR; | |
621 | } | |
622 | ||
623 | m->size = (uint64_t) sz; | |
624 | } | |
625 | ||
626 | if (fseeko(m->tmp, pos, SEEK_SET) < 0) { | |
627 | log_error("Failed to seek to position: %m"); | |
628 | return MHD_CONTENT_READER_END_WITH_ERROR; | |
629 | } | |
630 | ||
631 | n = m->size - pos; | |
632 | if (n > max) | |
633 | n = max; | |
634 | ||
635 | errno = 0; | |
636 | k = fread(buf, 1, n, m->tmp); | |
637 | if (k != n) { | |
638 | log_error("Failed to read from file: %s", errno ? strerror(errno) : "Premature EOF"); | |
639 | return MHD_CONTENT_READER_END_WITH_ERROR; | |
640 | } | |
641 | ||
642 | return (ssize_t) k; | |
643 | } | |
644 | ||
645 | static int request_handler_fields( | |
646 | struct MHD_Connection *connection, | |
647 | const char *field, | |
648 | void *connection_cls) { | |
649 | ||
650 | struct MHD_Response *response; | |
8530a143 | 651 | RequestMeta *m = connection_cls; |
240a5fe8 LP |
652 | int r; |
653 | ||
654 | assert(connection); | |
8530a143 | 655 | assert(m); |
240a5fe8 LP |
656 | |
657 | r = open_journal(m); | |
658 | if (r < 0) | |
659 | return respond_error(connection, MHD_HTTP_INTERNAL_SERVER_ERROR, "Failed to open journal: %s\n", strerror(-r)); | |
660 | ||
661 | if (request_parse_accept(m, connection) < 0) | |
662 | return respond_error(connection, MHD_HTTP_BAD_REQUEST, "Failed to parse Accept header.\n"); | |
663 | ||
664 | r = sd_journal_query_unique(m->journal, field); | |
665 | if (r < 0) | |
666 | return respond_error(connection, MHD_HTTP_BAD_REQUEST, "Failed to query unique fields.\n"); | |
667 | ||
668 | response = MHD_create_response_from_callback(MHD_SIZE_UNKNOWN, 4*1024, request_reader_fields, m, NULL); | |
669 | if (!response) | |
670 | return respond_oom(connection); | |
671 | ||
672 | MHD_add_response_header(response, "Content-Type", mime_types[m->mode == OUTPUT_JSON ? OUTPUT_JSON : OUTPUT_SHORT]); | |
673 | ||
674 | r = MHD_queue_response(connection, MHD_HTTP_OK, response); | |
675 | MHD_destroy_response(response); | |
676 | ||
677 | return r; | |
678 | } | |
679 | ||
7b17a7d7 LP |
680 | static int request_handler_redirect( |
681 | struct MHD_Connection *connection, | |
682 | const char *target) { | |
683 | ||
684 | char *page; | |
685 | struct MHD_Response *response; | |
686 | int ret; | |
687 | ||
688 | assert(connection); | |
fadd79d2 | 689 | assert(target); |
7b17a7d7 LP |
690 | |
691 | if (asprintf(&page, "<html><body>Please continue to the <a href=\"%s\">journal browser</a>.</body></html>", target) < 0) | |
692 | return respond_oom(connection); | |
693 | ||
694 | response = MHD_create_response_from_buffer(strlen(page), page, MHD_RESPMEM_MUST_FREE); | |
695 | if (!response) { | |
696 | free(page); | |
697 | return respond_oom(connection); | |
698 | } | |
699 | ||
700 | MHD_add_response_header(response, "Content-Type", "text/html"); | |
701 | MHD_add_response_header(response, "Location", target); | |
702 | ||
703 | ret = MHD_queue_response(connection, MHD_HTTP_MOVED_PERMANENTLY, response); | |
704 | MHD_destroy_response(response); | |
705 | ||
706 | return ret; | |
707 | } | |
708 | ||
709 | static int request_handler_file( | |
710 | struct MHD_Connection *connection, | |
711 | const char *path, | |
712 | const char *mime_type) { | |
713 | ||
714 | struct MHD_Response *response; | |
715 | int ret; | |
716 | _cleanup_close_ int fd = -1; | |
717 | struct stat st; | |
718 | ||
719 | assert(connection); | |
720 | assert(path); | |
721 | assert(mime_type); | |
722 | ||
723 | fd = open(path, O_RDONLY|O_CLOEXEC); | |
724 | if (fd < 0) | |
725 | return respond_error(connection, MHD_HTTP_NOT_FOUND, "Failed to open file %s: %m\n", path); | |
726 | ||
727 | if (fstat(fd, &st) < 0) | |
728 | return respond_error(connection, MHD_HTTP_INTERNAL_SERVER_ERROR, "Failed to stat file: %m\n"); | |
729 | ||
730 | response = MHD_create_response_from_fd_at_offset(st.st_size, fd, 0); | |
731 | if (!response) | |
732 | return respond_oom(connection); | |
733 | ||
734 | fd = -1; | |
735 | ||
736 | MHD_add_response_header(response, "Content-Type", mime_type); | |
737 | ||
738 | ret = MHD_queue_response(connection, MHD_HTTP_OK, response); | |
739 | MHD_destroy_response(response); | |
740 | ||
741 | return ret; | |
742 | } | |
743 | ||
a7edaadd | 744 | static int get_virtualization(char **v) { |
917b5dc7 | 745 | _cleanup_bus_message_unref_ sd_bus_message *reply = NULL; |
a7edaadd LP |
746 | _cleanup_bus_unref_ sd_bus *bus = NULL; |
747 | const char *t; | |
748 | char *b; | |
749 | int r; | |
750 | ||
751 | r = sd_bus_open_system(&bus); | |
752 | if (r < 0) | |
753 | return r; | |
754 | ||
917b5dc7 | 755 | r = sd_bus_call_method( |
a7edaadd LP |
756 | bus, |
757 | "org.freedesktop.systemd1", | |
758 | "/org/freedesktop/systemd1", | |
759 | "org.freedesktop.DBus.Properties", | |
760 | "Get", | |
917b5dc7 LP |
761 | NULL, |
762 | &reply, | |
763 | "ss", | |
764 | "org.freedesktop.systemd1.Manager", | |
765 | "Virtualization"); | |
a7edaadd LP |
766 | if (r < 0) |
767 | return r; | |
768 | ||
769 | r = sd_bus_message_read(reply, "v", "s", &t); | |
770 | if (r < 0) | |
771 | return r; | |
772 | ||
773 | if (isempty(t)) { | |
774 | *v = NULL; | |
775 | return 0; | |
776 | } | |
777 | ||
778 | b = strdup(t); | |
779 | if (!b) | |
780 | return -ENOMEM; | |
781 | ||
782 | *v = b; | |
783 | return 1; | |
784 | } | |
785 | ||
7b17a7d7 LP |
786 | static int request_handler_machine( |
787 | struct MHD_Connection *connection, | |
8530a143 | 788 | void *connection_cls) { |
7b17a7d7 LP |
789 | |
790 | struct MHD_Response *response; | |
8530a143 | 791 | RequestMeta *m = connection_cls; |
7b17a7d7 LP |
792 | int r; |
793 | _cleanup_free_ char* hostname = NULL, *os_name = NULL; | |
794 | uint64_t cutoff_from, cutoff_to, usage; | |
795 | char *json; | |
796 | sd_id128_t mid, bid; | |
a7edaadd | 797 | _cleanup_free_ char *v = NULL; |
7b17a7d7 LP |
798 | |
799 | assert(connection); | |
8530a143 | 800 | assert(m); |
7b17a7d7 LP |
801 | |
802 | r = open_journal(m); | |
803 | if (r < 0) | |
804 | return respond_error(connection, MHD_HTTP_INTERNAL_SERVER_ERROR, "Failed to open journal: %s\n", strerror(-r)); | |
805 | ||
806 | r = sd_id128_get_machine(&mid); | |
807 | if (r < 0) | |
808 | return respond_error(connection, MHD_HTTP_INTERNAL_SERVER_ERROR, "Failed to determine machine ID: %s\n", strerror(-r)); | |
809 | ||
810 | r = sd_id128_get_boot(&bid); | |
811 | if (r < 0) | |
812 | return respond_error(connection, MHD_HTTP_INTERNAL_SERVER_ERROR, "Failed to determine boot ID: %s\n", strerror(-r)); | |
813 | ||
814 | hostname = gethostname_malloc(); | |
815 | if (!hostname) | |
816 | return respond_oom(connection); | |
817 | ||
818 | r = sd_journal_get_usage(m->journal, &usage); | |
819 | if (r < 0) | |
820 | return respond_error(connection, MHD_HTTP_INTERNAL_SERVER_ERROR, "Failed to determine disk usage: %s\n", strerror(-r)); | |
821 | ||
822 | r = sd_journal_get_cutoff_realtime_usec(m->journal, &cutoff_from, &cutoff_to); | |
823 | if (r < 0) | |
824 | return respond_error(connection, MHD_HTTP_INTERNAL_SERVER_ERROR, "Failed to determine disk usage: %s\n", strerror(-r)); | |
825 | ||
826 | parse_env_file("/etc/os-release", NEWLINE, "PRETTY_NAME", &os_name, NULL); | |
827 | ||
a7edaadd | 828 | get_virtualization(&v); |
7b17a7d7 LP |
829 | |
830 | r = asprintf(&json, | |
831 | "{ \"machine_id\" : \"" SD_ID128_FORMAT_STR "\"," | |
832 | "\"boot_id\" : \"" SD_ID128_FORMAT_STR "\"," | |
833 | "\"hostname\" : \"%s\"," | |
834 | "\"os_pretty_name\" : \"%s\"," | |
835 | "\"virtualization\" : \"%s\"," | |
507f22bd ZJS |
836 | "\"usage\" : \"%"PRIu64"\"," |
837 | "\"cutoff_from_realtime\" : \"%"PRIu64"\"," | |
838 | "\"cutoff_to_realtime\" : \"%"PRIu64"\" }\n", | |
7b17a7d7 LP |
839 | SD_ID128_FORMAT_VAL(mid), |
840 | SD_ID128_FORMAT_VAL(bid), | |
e724b063 | 841 | hostname_cleanup(hostname, false), |
7b17a7d7 | 842 | os_name ? os_name : "Linux", |
a7edaadd | 843 | v ? v : "bare", |
507f22bd ZJS |
844 | usage, |
845 | cutoff_from, | |
846 | cutoff_to); | |
7b17a7d7 LP |
847 | |
848 | if (r < 0) | |
849 | return respond_oom(connection); | |
850 | ||
851 | response = MHD_create_response_from_buffer(strlen(json), json, MHD_RESPMEM_MUST_FREE); | |
852 | if (!response) { | |
853 | free(json); | |
854 | return respond_oom(connection); | |
855 | } | |
856 | ||
857 | MHD_add_response_header(response, "Content-Type", "application/json"); | |
858 | r = MHD_queue_response(connection, MHD_HTTP_OK, response); | |
859 | MHD_destroy_response(response); | |
860 | ||
861 | return r; | |
862 | } | |
863 | ||
864 | static int request_handler( | |
865 | void *cls, | |
866 | struct MHD_Connection *connection, | |
867 | const char *url, | |
868 | const char *method, | |
869 | const char *version, | |
870 | const char *upload_data, | |
871 | size_t *upload_data_size, | |
872 | void **connection_cls) { | |
873 | ||
874 | assert(connection); | |
8530a143 | 875 | assert(connection_cls); |
7b17a7d7 LP |
876 | assert(url); |
877 | assert(method); | |
878 | ||
879 | if (!streq(method, "GET")) | |
a93035ce ZJS |
880 | return respond_error(connection, MHD_HTTP_METHOD_NOT_ACCEPTABLE, |
881 | "Unsupported method.\n"); | |
882 | ||
7b17a7d7 | 883 | |
8530a143 ZJS |
884 | if (!*connection_cls) { |
885 | if (!request_meta(connection_cls)) | |
886 | return respond_oom(connection); | |
887 | return MHD_YES; | |
888 | } | |
889 | ||
7b17a7d7 LP |
890 | if (streq(url, "/")) |
891 | return request_handler_redirect(connection, "/browse"); | |
892 | ||
893 | if (streq(url, "/entries")) | |
8530a143 | 894 | return request_handler_entries(connection, *connection_cls); |
7b17a7d7 | 895 | |
240a5fe8 | 896 | if (startswith(url, "/fields/")) |
8530a143 | 897 | return request_handler_fields(connection, url + 8, *connection_cls); |
240a5fe8 | 898 | |
7b17a7d7 LP |
899 | if (streq(url, "/browse")) |
900 | return request_handler_file(connection, DOCUMENT_ROOT "/browse.html", "text/html"); | |
901 | ||
902 | if (streq(url, "/machine")) | |
8530a143 | 903 | return request_handler_machine(connection, *connection_cls); |
7b17a7d7 LP |
904 | |
905 | return respond_error(connection, MHD_HTTP_NOT_FOUND, "Not found.\n"); | |
906 | } | |
907 | ||
c3a7cfb7 ZJS |
908 | static int help(void) { |
909 | ||
910 | printf("%s [OPTIONS...] ...\n\n" | |
911 | "HTTP server for journal events.\n\n" | |
912 | " -h --help Show this help\n" | |
913 | " --version Show package version\n" | |
914 | " --cert=CERT.PEM Specify server certificate in PEM format\n" | |
915 | " --key=KEY.PEM Specify server key in PEM format\n", | |
916 | program_invocation_short_name); | |
917 | ||
918 | return 0; | |
919 | } | |
920 | ||
858634ff ZJS |
921 | static char *key_pem = NULL; |
922 | static char *cert_pem = NULL; | |
923 | ||
924 | static int parse_argv(int argc, char *argv[]) { | |
925 | enum { | |
926 | ARG_VERSION = 0x100, | |
927 | ARG_KEY, | |
928 | ARG_CERT, | |
929 | }; | |
930 | ||
931 | int r, c; | |
932 | ||
933 | static const struct option options[] = { | |
c3a7cfb7 | 934 | { "help", no_argument, NULL, 'h' }, |
858634ff ZJS |
935 | { "version", no_argument, NULL, ARG_VERSION }, |
936 | { "key", required_argument, NULL, ARG_KEY }, | |
937 | { "cert", required_argument, NULL, ARG_CERT }, | |
eb9da376 | 938 | {} |
858634ff ZJS |
939 | }; |
940 | ||
941 | assert(argc >= 0); | |
942 | assert(argv); | |
943 | ||
c3a7cfb7 | 944 | while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0) |
eb9da376 | 945 | |
858634ff | 946 | switch(c) { |
eb9da376 LP |
947 | |
948 | case 'h': | |
949 | return help(); | |
950 | ||
858634ff ZJS |
951 | case ARG_VERSION: |
952 | puts(PACKAGE_STRING); | |
953 | puts(SYSTEMD_FEATURES); | |
954 | return 0; | |
955 | ||
956 | case ARG_KEY: | |
957 | if (key_pem) { | |
958 | log_error("Key file specified twice"); | |
959 | return -EINVAL; | |
960 | } | |
961 | r = read_full_file(optarg, &key_pem, NULL); | |
962 | if (r < 0) { | |
963 | log_error("Failed to read key file: %s", strerror(-r)); | |
964 | return r; | |
965 | } | |
966 | assert(key_pem); | |
967 | break; | |
7b17a7d7 | 968 | |
858634ff ZJS |
969 | case ARG_CERT: |
970 | if (cert_pem) { | |
971 | log_error("Certificate file specified twice"); | |
972 | return -EINVAL; | |
973 | } | |
974 | r = read_full_file(optarg, &cert_pem, NULL); | |
975 | if (r < 0) { | |
976 | log_error("Failed to read certificate file: %s", strerror(-r)); | |
977 | return r; | |
978 | } | |
979 | assert(cert_pem); | |
980 | break; | |
981 | ||
982 | case '?': | |
983 | return -EINVAL; | |
984 | ||
985 | default: | |
eb9da376 | 986 | assert_not_reached("Unhandled option"); |
858634ff ZJS |
987 | } |
988 | ||
989 | if (optind < argc) { | |
7b17a7d7 | 990 | log_error("This program does not take arguments."); |
858634ff ZJS |
991 | return -EINVAL; |
992 | } | |
993 | ||
994 | if (!!key_pem != !!cert_pem) { | |
995 | log_error("Certificate and key files must be specified together"); | |
996 | return -EINVAL; | |
7b17a7d7 LP |
997 | } |
998 | ||
858634ff ZJS |
999 | return 1; |
1000 | } | |
1001 | ||
1002 | int main(int argc, char *argv[]) { | |
1003 | struct MHD_Daemon *d = NULL; | |
1004 | int r, n; | |
1005 | ||
77ad3b93 | 1006 | log_set_target(LOG_TARGET_AUTO); |
7b17a7d7 LP |
1007 | log_parse_environment(); |
1008 | log_open(); | |
1009 | ||
858634ff ZJS |
1010 | r = parse_argv(argc, argv); |
1011 | if (r < 0) | |
1012 | return EXIT_FAILURE; | |
1013 | if (r == 0) | |
1014 | return EXIT_SUCCESS; | |
1015 | ||
7b17a7d7 LP |
1016 | n = sd_listen_fds(1); |
1017 | if (n < 0) { | |
1018 | log_error("Failed to determine passed sockets: %s", strerror(-n)); | |
1019 | goto finish; | |
1020 | } else if (n > 1) { | |
1021 | log_error("Can't listen on more than one socket."); | |
1022 | goto finish; | |
7b17a7d7 | 1023 | } else { |
c54ff8e3 ZJS |
1024 | struct MHD_OptionItem opts[] = { |
1025 | { MHD_OPTION_NOTIFY_COMPLETED, | |
1026 | (intptr_t) request_meta_free, NULL }, | |
e64690a8 ZJS |
1027 | { MHD_OPTION_EXTERNAL_LOGGER, |
1028 | (intptr_t) microhttpd_logger, NULL }, | |
c54ff8e3 | 1029 | { MHD_OPTION_END, 0, NULL }, |
858634ff ZJS |
1030 | { MHD_OPTION_END, 0, NULL }, |
1031 | { MHD_OPTION_END, 0, NULL }, | |
c54ff8e3 | 1032 | { MHD_OPTION_END, 0, NULL }}; |
e64690a8 | 1033 | int opts_pos = 2; |
858634ff ZJS |
1034 | int flags = MHD_USE_THREAD_PER_CONNECTION|MHD_USE_POLL|MHD_USE_DEBUG; |
1035 | ||
c54ff8e3 | 1036 | if (n > 0) |
858634ff ZJS |
1037 | opts[opts_pos++] = (struct MHD_OptionItem) |
1038 | {MHD_OPTION_LISTEN_SOCKET, SD_LISTEN_FDS_START}; | |
1039 | if (key_pem) { | |
1040 | assert(cert_pem); | |
1041 | opts[opts_pos++] = (struct MHD_OptionItem) | |
1042 | {MHD_OPTION_HTTPS_MEM_KEY, 0, key_pem}; | |
1043 | opts[opts_pos++] = (struct MHD_OptionItem) | |
1044 | {MHD_OPTION_HTTPS_MEM_CERT, 0, cert_pem}; | |
1045 | flags |= MHD_USE_SSL; | |
1046 | } | |
1047 | ||
1048 | d = MHD_start_daemon(flags, 19531, | |
1049 | NULL, NULL, | |
1050 | request_handler, NULL, | |
1051 | MHD_OPTION_ARRAY, opts, | |
1052 | MHD_OPTION_END); | |
7b17a7d7 LP |
1053 | } |
1054 | ||
6374a73b | 1055 | if (!d) { |
7b17a7d7 LP |
1056 | log_error("Failed to start daemon!"); |
1057 | goto finish; | |
1058 | } | |
1059 | ||
1060 | pause(); | |
1061 | ||
1062 | r = EXIT_SUCCESS; | |
1063 | ||
1064 | finish: | |
6374a73b ZJS |
1065 | if (d) |
1066 | MHD_stop_daemon(d); | |
7b17a7d7 LP |
1067 | |
1068 | return r; | |
1069 | } |