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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" | |
34 | #include "logs-show.h" | |
35 | #include "virt.h" | |
858634ff | 36 | #include "build.h" |
7b17a7d7 LP |
37 | |
38 | typedef struct RequestMeta { | |
39 | sd_journal *journal; | |
40 | ||
41 | OutputMode mode; | |
42 | ||
43 | char *cursor; | |
44 | int64_t n_skip; | |
45 | uint64_t n_entries; | |
46 | bool n_entries_set; | |
47 | ||
48 | FILE *tmp; | |
49 | uint64_t delta, size; | |
98206c93 LP |
50 | |
51 | int argument_parse_error; | |
7a69007a LP |
52 | |
53 | bool follow; | |
c6511e85 | 54 | bool discrete; |
240a5fe8 LP |
55 | |
56 | uint64_t n_fields; | |
57 | bool n_fields_set; | |
7b17a7d7 LP |
58 | } RequestMeta; |
59 | ||
60 | static const char* const mime_types[_OUTPUT_MODE_MAX] = { | |
61 | [OUTPUT_SHORT] = "text/plain", | |
62 | [OUTPUT_JSON] = "application/json", | |
48383c25 LP |
63 | [OUTPUT_JSON_SSE] = "text/event-stream", |
64 | [OUTPUT_EXPORT] = "application/vnd.fdo.journal", | |
7b17a7d7 LP |
65 | }; |
66 | ||
67 | static RequestMeta *request_meta(void **connection_cls) { | |
68 | RequestMeta *m; | |
69 | ||
70 | if (*connection_cls) | |
71 | return *connection_cls; | |
72 | ||
73 | m = new0(RequestMeta, 1); | |
74 | if (!m) | |
75 | return NULL; | |
76 | ||
77 | *connection_cls = m; | |
78 | return m; | |
79 | } | |
80 | ||
81 | static void request_meta_free( | |
82 | void *cls, | |
83 | struct MHD_Connection *connection, | |
84 | void **connection_cls, | |
85 | enum MHD_RequestTerminationCode toe) { | |
86 | ||
87 | RequestMeta *m = *connection_cls; | |
88 | ||
89 | if (!m) | |
90 | return; | |
91 | ||
92 | if (m->journal) | |
93 | sd_journal_close(m->journal); | |
94 | ||
95 | if (m->tmp) | |
96 | fclose(m->tmp); | |
97 | ||
98 | free(m->cursor); | |
99 | free(m); | |
100 | } | |
101 | ||
102 | static int open_journal(RequestMeta *m) { | |
103 | assert(m); | |
104 | ||
105 | if (m->journal) | |
106 | return 0; | |
107 | ||
108 | return sd_journal_open(&m->journal, SD_JOURNAL_LOCAL_ONLY|SD_JOURNAL_SYSTEM_ONLY); | |
109 | } | |
110 | ||
111 | ||
112 | static int respond_oom(struct MHD_Connection *connection) { | |
113 | struct MHD_Response *response; | |
114 | const char m[] = "Out of memory.\n"; | |
115 | int ret; | |
116 | ||
117 | assert(connection); | |
118 | ||
119 | response = MHD_create_response_from_buffer(sizeof(m)-1, (char*) m, MHD_RESPMEM_PERSISTENT); | |
120 | if (!response) | |
121 | return MHD_NO; | |
122 | ||
123 | MHD_add_response_header(response, "Content-Type", "text/plain"); | |
124 | ret = MHD_queue_response(connection, MHD_HTTP_SERVICE_UNAVAILABLE, response); | |
125 | MHD_destroy_response(response); | |
126 | ||
127 | return ret; | |
128 | } | |
129 | ||
130 | static int respond_error( | |
131 | struct MHD_Connection *connection, | |
132 | unsigned code, | |
133 | const char *format, ...) { | |
134 | ||
135 | struct MHD_Response *response; | |
136 | char *m; | |
137 | int r; | |
138 | va_list ap; | |
139 | ||
140 | assert(connection); | |
141 | assert(format); | |
142 | ||
143 | va_start(ap, format); | |
144 | r = vasprintf(&m, format, ap); | |
145 | va_end(ap); | |
146 | ||
147 | if (r < 0) | |
148 | return respond_oom(connection); | |
149 | ||
150 | response = MHD_create_response_from_buffer(strlen(m), m, MHD_RESPMEM_MUST_FREE); | |
151 | if (!response) { | |
152 | free(m); | |
153 | return respond_oom(connection); | |
154 | } | |
155 | ||
156 | MHD_add_response_header(response, "Content-Type", "text/plain"); | |
157 | r = MHD_queue_response(connection, code, response); | |
158 | MHD_destroy_response(response); | |
159 | ||
160 | return r; | |
161 | } | |
162 | ||
163 | static ssize_t request_reader_entries( | |
164 | void *cls, | |
165 | uint64_t pos, | |
166 | char *buf, | |
167 | size_t max) { | |
168 | ||
169 | RequestMeta *m = cls; | |
170 | int r; | |
171 | size_t n, k; | |
172 | ||
173 | assert(m); | |
174 | assert(buf); | |
175 | assert(max > 0); | |
176 | assert(pos >= m->delta); | |
177 | ||
178 | pos -= m->delta; | |
179 | ||
180 | while (pos >= m->size) { | |
181 | off_t sz; | |
182 | ||
183 | /* End of this entry, so let's serialize the next | |
184 | * one */ | |
185 | ||
186 | if (m->n_entries_set && | |
187 | m->n_entries <= 0) | |
188 | return MHD_CONTENT_READER_END_OF_STREAM; | |
189 | ||
77ad3b93 LP |
190 | if (m->n_skip < 0) |
191 | r = sd_journal_previous_skip(m->journal, (uint64_t) -m->n_skip + 1); | |
192 | else if (m->n_skip > 0) | |
7b17a7d7 LP |
193 | r = sd_journal_next_skip(m->journal, (uint64_t) m->n_skip + 1); |
194 | else | |
195 | r = sd_journal_next(m->journal); | |
196 | ||
197 | if (r < 0) { | |
198 | log_error("Failed to advance journal pointer: %s", strerror(-r)); | |
199 | return MHD_CONTENT_READER_END_WITH_ERROR; | |
7a69007a LP |
200 | } else if (r == 0) { |
201 | ||
202 | if (m->follow) { | |
203 | r = sd_journal_wait(m->journal, (uint64_t) -1); | |
204 | if (r < 0) { | |
205 | log_error("Couldn't wait for journal event: %s", strerror(-r)); | |
206 | return MHD_CONTENT_READER_END_WITH_ERROR; | |
207 | } | |
208 | ||
209 | continue; | |
210 | } | |
211 | ||
7b17a7d7 | 212 | return MHD_CONTENT_READER_END_OF_STREAM; |
7a69007a | 213 | } |
7b17a7d7 | 214 | |
c6511e85 LP |
215 | if (m->discrete) { |
216 | assert(m->cursor); | |
217 | ||
218 | r = sd_journal_test_cursor(m->journal, m->cursor); | |
219 | if (r < 0) { | |
220 | log_error("Failed to test cursor: %s", strerror(-r)); | |
221 | return MHD_CONTENT_READER_END_WITH_ERROR; | |
222 | } | |
223 | ||
224 | if (r == 0) | |
225 | return MHD_CONTENT_READER_END_OF_STREAM; | |
226 | } | |
227 | ||
7b17a7d7 LP |
228 | pos -= m->size; |
229 | m->delta += m->size; | |
230 | ||
231 | if (m->n_entries_set) | |
232 | m->n_entries -= 1; | |
233 | ||
234 | m->n_skip = 0; | |
235 | ||
236 | if (m->tmp) | |
237 | rewind(m->tmp); | |
238 | else { | |
239 | m->tmp = tmpfile(); | |
240 | if (!m->tmp) { | |
241 | log_error("Failed to create temporary file: %m"); | |
33b40551 | 242 | return MHD_CONTENT_READER_END_WITH_ERROR; |
7b17a7d7 LP |
243 | } |
244 | } | |
245 | ||
246 | r = output_journal(m->tmp, m->journal, m->mode, 0, OUTPUT_FULL_WIDTH); | |
247 | if (r < 0) { | |
248 | log_error("Failed to serialize item: %s", strerror(-r)); | |
249 | return MHD_CONTENT_READER_END_WITH_ERROR; | |
250 | } | |
251 | ||
252 | sz = ftello(m->tmp); | |
253 | if (sz == (off_t) -1) { | |
254 | log_error("Failed to retrieve file position: %m"); | |
255 | return MHD_CONTENT_READER_END_WITH_ERROR; | |
256 | } | |
257 | ||
258 | m->size = (uint64_t) sz; | |
259 | } | |
260 | ||
261 | if (fseeko(m->tmp, pos, SEEK_SET) < 0) { | |
262 | log_error("Failed to seek to position: %m"); | |
263 | return MHD_CONTENT_READER_END_WITH_ERROR; | |
264 | } | |
265 | ||
266 | n = m->size - pos; | |
267 | if (n > max) | |
268 | n = max; | |
269 | ||
270 | errno = 0; | |
271 | k = fread(buf, 1, n, m->tmp); | |
272 | if (k != n) { | |
273 | log_error("Failed to read from file: %s", errno ? strerror(errno) : "Premature EOF"); | |
274 | return MHD_CONTENT_READER_END_WITH_ERROR; | |
275 | } | |
276 | ||
277 | return (ssize_t) k; | |
278 | } | |
279 | ||
280 | static int request_parse_accept( | |
281 | RequestMeta *m, | |
282 | struct MHD_Connection *connection) { | |
283 | ||
6374a73b | 284 | const char *header; |
7b17a7d7 LP |
285 | |
286 | assert(m); | |
287 | assert(connection); | |
288 | ||
6374a73b ZJS |
289 | header = MHD_lookup_connection_value(connection, MHD_HEADER_KIND, "Accept"); |
290 | if (!header) | |
7b17a7d7 LP |
291 | return 0; |
292 | ||
6374a73b | 293 | if (streq(header, mime_types[OUTPUT_JSON])) |
7b17a7d7 | 294 | m->mode = OUTPUT_JSON; |
6374a73b | 295 | else if (streq(header, mime_types[OUTPUT_JSON_SSE])) |
48383c25 | 296 | m->mode = OUTPUT_JSON_SSE; |
6374a73b | 297 | else if (streq(header, mime_types[OUTPUT_EXPORT])) |
7b17a7d7 LP |
298 | m->mode = OUTPUT_EXPORT; |
299 | else | |
300 | m->mode = OUTPUT_SHORT; | |
301 | ||
302 | return 0; | |
303 | } | |
304 | ||
305 | static int request_parse_range( | |
306 | RequestMeta *m, | |
307 | struct MHD_Connection *connection) { | |
308 | ||
309 | const char *range, *colon, *colon2; | |
310 | int r; | |
311 | ||
312 | assert(m); | |
313 | assert(connection); | |
314 | ||
315 | range = MHD_lookup_connection_value(connection, MHD_HEADER_KIND, "Range"); | |
316 | if (!range) | |
317 | return 0; | |
318 | ||
319 | if (!startswith(range, "entries=")) | |
320 | return 0; | |
321 | ||
322 | range += 8; | |
323 | range += strspn(range, WHITESPACE); | |
324 | ||
325 | colon = strchr(range, ':'); | |
326 | if (!colon) | |
327 | m->cursor = strdup(range); | |
328 | else { | |
329 | const char *p; | |
330 | ||
331 | colon2 = strchr(colon + 1, ':'); | |
332 | if (colon2) { | |
4a1909bb | 333 | char _cleanup_free_ *t; |
7b17a7d7 LP |
334 | |
335 | t = strndup(colon + 1, colon2 - colon - 1); | |
336 | if (!t) | |
337 | return -ENOMEM; | |
338 | ||
339 | r = safe_atoi64(t, &m->n_skip); | |
7b17a7d7 LP |
340 | if (r < 0) |
341 | return r; | |
342 | } | |
343 | ||
344 | p = (colon2 ? colon2 : colon) + 1; | |
345 | if (*p) { | |
346 | r = safe_atou64(p, &m->n_entries); | |
347 | if (r < 0) | |
348 | return r; | |
349 | ||
350 | if (m->n_entries <= 0) | |
351 | return -EINVAL; | |
352 | ||
353 | m->n_entries_set = true; | |
354 | } | |
355 | ||
356 | m->cursor = strndup(range, colon - range); | |
357 | } | |
358 | ||
359 | if (!m->cursor) | |
360 | return -ENOMEM; | |
361 | ||
362 | m->cursor[strcspn(m->cursor, WHITESPACE)] = 0; | |
363 | if (isempty(m->cursor)) { | |
364 | free(m->cursor); | |
365 | m->cursor = NULL; | |
366 | } | |
367 | ||
368 | return 0; | |
369 | } | |
370 | ||
98206c93 LP |
371 | static int request_parse_arguments_iterator( |
372 | void *cls, | |
373 | enum MHD_ValueKind kind, | |
374 | const char *key, | |
375 | const char *value) { | |
376 | ||
377 | RequestMeta *m = cls; | |
378 | _cleanup_free_ char *p = NULL; | |
379 | int r; | |
380 | ||
381 | assert(m); | |
382 | ||
383 | if (isempty(key)) { | |
384 | m->argument_parse_error = -EINVAL; | |
385 | return MHD_NO; | |
386 | } | |
387 | ||
7a69007a LP |
388 | if (streq(key, "follow")) { |
389 | if (isempty(value)) { | |
390 | m->follow = true; | |
391 | return MHD_YES; | |
392 | } | |
393 | ||
394 | r = parse_boolean(value); | |
395 | if (r < 0) { | |
396 | m->argument_parse_error = r; | |
397 | return MHD_NO; | |
398 | } | |
399 | ||
400 | m->follow = r; | |
401 | return MHD_YES; | |
402 | } | |
403 | ||
c6511e85 LP |
404 | if (streq(key, "discrete")) { |
405 | if (isempty(value)) { | |
406 | m->discrete = true; | |
407 | return MHD_YES; | |
408 | } | |
409 | ||
410 | r = parse_boolean(value); | |
411 | if (r < 0) { | |
412 | m->argument_parse_error = r; | |
413 | return MHD_NO; | |
414 | } | |
415 | ||
416 | m->discrete = r; | |
417 | return MHD_YES; | |
418 | } | |
419 | ||
082d0180 LP |
420 | if (streq(key, "boot")) { |
421 | if (isempty(value)) | |
422 | r = true; | |
423 | else { | |
424 | r = parse_boolean(value); | |
425 | if (r < 0) { | |
426 | m->argument_parse_error = r; | |
427 | return MHD_NO; | |
428 | } | |
429 | } | |
430 | ||
431 | if (r) { | |
432 | char match[9 + 32 + 1] = "_BOOT_ID="; | |
433 | sd_id128_t bid; | |
434 | ||
435 | r = sd_id128_get_boot(&bid); | |
436 | if (r < 0) { | |
437 | log_error("Failed to get boot ID: %s", strerror(-r)); | |
438 | return MHD_NO; | |
439 | } | |
440 | ||
441 | sd_id128_to_string(bid, match + 9); | |
442 | r = sd_journal_add_match(m->journal, match, sizeof(match)-1); | |
443 | if (r < 0) { | |
444 | m->argument_parse_error = r; | |
445 | return MHD_NO; | |
446 | } | |
447 | } | |
448 | ||
449 | return MHD_YES; | |
450 | } | |
451 | ||
98206c93 LP |
452 | p = strjoin(key, "=", strempty(value), NULL); |
453 | if (!p) { | |
454 | m->argument_parse_error = log_oom(); | |
455 | return MHD_NO; | |
456 | } | |
457 | ||
458 | r = sd_journal_add_match(m->journal, p, 0); | |
459 | if (r < 0) { | |
460 | m->argument_parse_error = r; | |
461 | return MHD_NO; | |
462 | } | |
463 | ||
464 | return MHD_YES; | |
465 | } | |
466 | ||
467 | static int request_parse_arguments( | |
468 | RequestMeta *m, | |
469 | struct MHD_Connection *connection) { | |
470 | ||
471 | assert(m); | |
472 | assert(connection); | |
473 | ||
474 | m->argument_parse_error = 0; | |
475 | MHD_get_connection_values(connection, MHD_GET_ARGUMENT_KIND, request_parse_arguments_iterator, m); | |
476 | ||
477 | return m->argument_parse_error; | |
478 | } | |
479 | ||
7b17a7d7 LP |
480 | static int request_handler_entries( |
481 | struct MHD_Connection *connection, | |
482 | void **connection_cls) { | |
483 | ||
484 | struct MHD_Response *response; | |
485 | RequestMeta *m; | |
486 | int r; | |
487 | ||
488 | assert(connection); | |
489 | assert(connection_cls); | |
490 | ||
491 | m = request_meta(connection_cls); | |
492 | if (!m) | |
493 | return respond_oom(connection); | |
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; | |
651 | RequestMeta *m; | |
652 | int r; | |
653 | ||
654 | assert(connection); | |
655 | assert(connection_cls); | |
656 | ||
657 | m = request_meta(connection_cls); | |
658 | if (!m) | |
659 | return respond_oom(connection); | |
660 | ||
661 | r = open_journal(m); | |
662 | if (r < 0) | |
663 | return respond_error(connection, MHD_HTTP_INTERNAL_SERVER_ERROR, "Failed to open journal: %s\n", strerror(-r)); | |
664 | ||
665 | if (request_parse_accept(m, connection) < 0) | |
666 | return respond_error(connection, MHD_HTTP_BAD_REQUEST, "Failed to parse Accept header.\n"); | |
667 | ||
668 | r = sd_journal_query_unique(m->journal, field); | |
669 | if (r < 0) | |
670 | return respond_error(connection, MHD_HTTP_BAD_REQUEST, "Failed to query unique fields.\n"); | |
671 | ||
672 | response = MHD_create_response_from_callback(MHD_SIZE_UNKNOWN, 4*1024, request_reader_fields, m, NULL); | |
673 | if (!response) | |
674 | return respond_oom(connection); | |
675 | ||
676 | MHD_add_response_header(response, "Content-Type", mime_types[m->mode == OUTPUT_JSON ? OUTPUT_JSON : OUTPUT_SHORT]); | |
677 | ||
678 | r = MHD_queue_response(connection, MHD_HTTP_OK, response); | |
679 | MHD_destroy_response(response); | |
680 | ||
681 | return r; | |
682 | } | |
683 | ||
7b17a7d7 LP |
684 | static int request_handler_redirect( |
685 | struct MHD_Connection *connection, | |
686 | const char *target) { | |
687 | ||
688 | char *page; | |
689 | struct MHD_Response *response; | |
690 | int ret; | |
691 | ||
692 | assert(connection); | |
fadd79d2 | 693 | assert(target); |
7b17a7d7 LP |
694 | |
695 | if (asprintf(&page, "<html><body>Please continue to the <a href=\"%s\">journal browser</a>.</body></html>", target) < 0) | |
696 | return respond_oom(connection); | |
697 | ||
698 | response = MHD_create_response_from_buffer(strlen(page), page, MHD_RESPMEM_MUST_FREE); | |
699 | if (!response) { | |
700 | free(page); | |
701 | return respond_oom(connection); | |
702 | } | |
703 | ||
704 | MHD_add_response_header(response, "Content-Type", "text/html"); | |
705 | MHD_add_response_header(response, "Location", target); | |
706 | ||
707 | ret = MHD_queue_response(connection, MHD_HTTP_MOVED_PERMANENTLY, response); | |
708 | MHD_destroy_response(response); | |
709 | ||
710 | return ret; | |
711 | } | |
712 | ||
713 | static int request_handler_file( | |
714 | struct MHD_Connection *connection, | |
715 | const char *path, | |
716 | const char *mime_type) { | |
717 | ||
718 | struct MHD_Response *response; | |
719 | int ret; | |
720 | _cleanup_close_ int fd = -1; | |
721 | struct stat st; | |
722 | ||
723 | assert(connection); | |
724 | assert(path); | |
725 | assert(mime_type); | |
726 | ||
727 | fd = open(path, O_RDONLY|O_CLOEXEC); | |
728 | if (fd < 0) | |
729 | return respond_error(connection, MHD_HTTP_NOT_FOUND, "Failed to open file %s: %m\n", path); | |
730 | ||
731 | if (fstat(fd, &st) < 0) | |
732 | return respond_error(connection, MHD_HTTP_INTERNAL_SERVER_ERROR, "Failed to stat file: %m\n"); | |
733 | ||
734 | response = MHD_create_response_from_fd_at_offset(st.st_size, fd, 0); | |
735 | if (!response) | |
736 | return respond_oom(connection); | |
737 | ||
738 | fd = -1; | |
739 | ||
740 | MHD_add_response_header(response, "Content-Type", mime_type); | |
741 | ||
742 | ret = MHD_queue_response(connection, MHD_HTTP_OK, response); | |
743 | MHD_destroy_response(response); | |
744 | ||
745 | return ret; | |
746 | } | |
747 | ||
748 | static int request_handler_machine( | |
749 | struct MHD_Connection *connection, | |
750 | void **connection_cls) { | |
751 | ||
752 | struct MHD_Response *response; | |
753 | RequestMeta *m; | |
754 | int r; | |
755 | _cleanup_free_ char* hostname = NULL, *os_name = NULL; | |
756 | uint64_t cutoff_from, cutoff_to, usage; | |
757 | char *json; | |
758 | sd_id128_t mid, bid; | |
759 | const char *v = "bare"; | |
760 | ||
761 | assert(connection); | |
762 | ||
763 | m = request_meta(connection_cls); | |
764 | if (!m) | |
765 | return respond_oom(connection); | |
766 | ||
767 | r = open_journal(m); | |
768 | if (r < 0) | |
769 | return respond_error(connection, MHD_HTTP_INTERNAL_SERVER_ERROR, "Failed to open journal: %s\n", strerror(-r)); | |
770 | ||
771 | r = sd_id128_get_machine(&mid); | |
772 | if (r < 0) | |
773 | return respond_error(connection, MHD_HTTP_INTERNAL_SERVER_ERROR, "Failed to determine machine ID: %s\n", strerror(-r)); | |
774 | ||
775 | r = sd_id128_get_boot(&bid); | |
776 | if (r < 0) | |
777 | return respond_error(connection, MHD_HTTP_INTERNAL_SERVER_ERROR, "Failed to determine boot ID: %s\n", strerror(-r)); | |
778 | ||
779 | hostname = gethostname_malloc(); | |
780 | if (!hostname) | |
781 | return respond_oom(connection); | |
782 | ||
783 | r = sd_journal_get_usage(m->journal, &usage); | |
784 | if (r < 0) | |
785 | return respond_error(connection, MHD_HTTP_INTERNAL_SERVER_ERROR, "Failed to determine disk usage: %s\n", strerror(-r)); | |
786 | ||
787 | r = sd_journal_get_cutoff_realtime_usec(m->journal, &cutoff_from, &cutoff_to); | |
788 | if (r < 0) | |
789 | return respond_error(connection, MHD_HTTP_INTERNAL_SERVER_ERROR, "Failed to determine disk usage: %s\n", strerror(-r)); | |
790 | ||
791 | parse_env_file("/etc/os-release", NEWLINE, "PRETTY_NAME", &os_name, NULL); | |
792 | ||
793 | detect_virtualization(&v); | |
794 | ||
795 | r = asprintf(&json, | |
796 | "{ \"machine_id\" : \"" SD_ID128_FORMAT_STR "\"," | |
797 | "\"boot_id\" : \"" SD_ID128_FORMAT_STR "\"," | |
798 | "\"hostname\" : \"%s\"," | |
799 | "\"os_pretty_name\" : \"%s\"," | |
800 | "\"virtualization\" : \"%s\"," | |
801 | "\"usage\" : \"%llu\"," | |
802 | "\"cutoff_from_realtime\" : \"%llu\"," | |
803 | "\"cutoff_to_realtime\" : \"%llu\" }\n", | |
804 | SD_ID128_FORMAT_VAL(mid), | |
805 | SD_ID128_FORMAT_VAL(bid), | |
806 | hostname_cleanup(hostname), | |
807 | os_name ? os_name : "Linux", | |
808 | v, | |
809 | (unsigned long long) usage, | |
810 | (unsigned long long) cutoff_from, | |
811 | (unsigned long long) cutoff_to); | |
812 | ||
813 | if (r < 0) | |
814 | return respond_oom(connection); | |
815 | ||
816 | response = MHD_create_response_from_buffer(strlen(json), json, MHD_RESPMEM_MUST_FREE); | |
817 | if (!response) { | |
818 | free(json); | |
819 | return respond_oom(connection); | |
820 | } | |
821 | ||
822 | MHD_add_response_header(response, "Content-Type", "application/json"); | |
823 | r = MHD_queue_response(connection, MHD_HTTP_OK, response); | |
824 | MHD_destroy_response(response); | |
825 | ||
826 | return r; | |
827 | } | |
828 | ||
829 | static int request_handler( | |
830 | void *cls, | |
831 | struct MHD_Connection *connection, | |
832 | const char *url, | |
833 | const char *method, | |
834 | const char *version, | |
835 | const char *upload_data, | |
836 | size_t *upload_data_size, | |
837 | void **connection_cls) { | |
838 | ||
839 | assert(connection); | |
840 | assert(url); | |
841 | assert(method); | |
842 | ||
843 | if (!streq(method, "GET")) | |
844 | return MHD_NO; | |
845 | ||
846 | if (streq(url, "/")) | |
847 | return request_handler_redirect(connection, "/browse"); | |
848 | ||
849 | if (streq(url, "/entries")) | |
850 | return request_handler_entries(connection, connection_cls); | |
851 | ||
240a5fe8 LP |
852 | if (startswith(url, "/fields/")) |
853 | return request_handler_fields(connection, url + 8, connection_cls); | |
854 | ||
7b17a7d7 LP |
855 | if (streq(url, "/browse")) |
856 | return request_handler_file(connection, DOCUMENT_ROOT "/browse.html", "text/html"); | |
857 | ||
858 | if (streq(url, "/machine")) | |
859 | return request_handler_machine(connection, connection_cls); | |
860 | ||
861 | return respond_error(connection, MHD_HTTP_NOT_FOUND, "Not found.\n"); | |
862 | } | |
863 | ||
858634ff ZJS |
864 | static char *key_pem = NULL; |
865 | static char *cert_pem = NULL; | |
866 | ||
867 | static int parse_argv(int argc, char *argv[]) { | |
868 | enum { | |
869 | ARG_VERSION = 0x100, | |
870 | ARG_KEY, | |
871 | ARG_CERT, | |
872 | }; | |
873 | ||
874 | int r, c; | |
875 | ||
876 | static const struct option options[] = { | |
877 | { "version", no_argument, NULL, ARG_VERSION }, | |
878 | { "key", required_argument, NULL, ARG_KEY }, | |
879 | { "cert", required_argument, NULL, ARG_CERT }, | |
880 | { NULL, 0, NULL, 0 } | |
881 | }; | |
882 | ||
883 | assert(argc >= 0); | |
884 | assert(argv); | |
885 | ||
886 | while ((c = getopt_long(argc, argv, "", options, NULL)) >= 0) | |
887 | switch(c) { | |
888 | case ARG_VERSION: | |
889 | puts(PACKAGE_STRING); | |
890 | puts(SYSTEMD_FEATURES); | |
891 | return 0; | |
892 | ||
893 | case ARG_KEY: | |
894 | if (key_pem) { | |
895 | log_error("Key file specified twice"); | |
896 | return -EINVAL; | |
897 | } | |
898 | r = read_full_file(optarg, &key_pem, NULL); | |
899 | if (r < 0) { | |
900 | log_error("Failed to read key file: %s", strerror(-r)); | |
901 | return r; | |
902 | } | |
903 | assert(key_pem); | |
904 | break; | |
7b17a7d7 | 905 | |
858634ff ZJS |
906 | case ARG_CERT: |
907 | if (cert_pem) { | |
908 | log_error("Certificate file specified twice"); | |
909 | return -EINVAL; | |
910 | } | |
911 | r = read_full_file(optarg, &cert_pem, NULL); | |
912 | if (r < 0) { | |
913 | log_error("Failed to read certificate file: %s", strerror(-r)); | |
914 | return r; | |
915 | } | |
916 | assert(cert_pem); | |
917 | break; | |
918 | ||
919 | case '?': | |
920 | return -EINVAL; | |
921 | ||
922 | default: | |
923 | log_error("Unknown option code %c", c); | |
924 | return -EINVAL; | |
925 | } | |
926 | ||
927 | if (optind < argc) { | |
7b17a7d7 | 928 | log_error("This program does not take arguments."); |
858634ff ZJS |
929 | return -EINVAL; |
930 | } | |
931 | ||
932 | if (!!key_pem != !!cert_pem) { | |
933 | log_error("Certificate and key files must be specified together"); | |
934 | return -EINVAL; | |
7b17a7d7 LP |
935 | } |
936 | ||
858634ff ZJS |
937 | return 1; |
938 | } | |
939 | ||
940 | int main(int argc, char *argv[]) { | |
941 | struct MHD_Daemon *d = NULL; | |
942 | int r, n; | |
943 | ||
77ad3b93 | 944 | log_set_target(LOG_TARGET_AUTO); |
7b17a7d7 LP |
945 | log_parse_environment(); |
946 | log_open(); | |
947 | ||
858634ff ZJS |
948 | r = parse_argv(argc, argv); |
949 | if (r < 0) | |
950 | return EXIT_FAILURE; | |
951 | if (r == 0) | |
952 | return EXIT_SUCCESS; | |
953 | ||
7b17a7d7 LP |
954 | n = sd_listen_fds(1); |
955 | if (n < 0) { | |
956 | log_error("Failed to determine passed sockets: %s", strerror(-n)); | |
957 | goto finish; | |
958 | } else if (n > 1) { | |
959 | log_error("Can't listen on more than one socket."); | |
960 | goto finish; | |
7b17a7d7 | 961 | } else { |
c54ff8e3 ZJS |
962 | struct MHD_OptionItem opts[] = { |
963 | { MHD_OPTION_NOTIFY_COMPLETED, | |
964 | (intptr_t) request_meta_free, NULL }, | |
965 | { MHD_OPTION_END, 0, NULL }, | |
858634ff ZJS |
966 | { MHD_OPTION_END, 0, NULL }, |
967 | { MHD_OPTION_END, 0, NULL }, | |
c54ff8e3 | 968 | { MHD_OPTION_END, 0, NULL }}; |
858634ff ZJS |
969 | int opts_pos = 1; |
970 | int flags = MHD_USE_THREAD_PER_CONNECTION|MHD_USE_POLL|MHD_USE_DEBUG; | |
971 | ||
c54ff8e3 | 972 | if (n > 0) |
858634ff ZJS |
973 | opts[opts_pos++] = (struct MHD_OptionItem) |
974 | {MHD_OPTION_LISTEN_SOCKET, SD_LISTEN_FDS_START}; | |
975 | if (key_pem) { | |
976 | assert(cert_pem); | |
977 | opts[opts_pos++] = (struct MHD_OptionItem) | |
978 | {MHD_OPTION_HTTPS_MEM_KEY, 0, key_pem}; | |
979 | opts[opts_pos++] = (struct MHD_OptionItem) | |
980 | {MHD_OPTION_HTTPS_MEM_CERT, 0, cert_pem}; | |
981 | flags |= MHD_USE_SSL; | |
982 | } | |
983 | ||
984 | d = MHD_start_daemon(flags, 19531, | |
985 | NULL, NULL, | |
986 | request_handler, NULL, | |
987 | MHD_OPTION_ARRAY, opts, | |
988 | MHD_OPTION_END); | |
7b17a7d7 LP |
989 | } |
990 | ||
6374a73b | 991 | if (!d) { |
7b17a7d7 LP |
992 | log_error("Failed to start daemon!"); |
993 | goto finish; | |
994 | } | |
995 | ||
996 | pause(); | |
997 | ||
998 | r = EXIT_SUCCESS; | |
999 | ||
1000 | finish: | |
6374a73b ZJS |
1001 | if (d) |
1002 | MHD_stop_daemon(d); | |
7b17a7d7 LP |
1003 | |
1004 | return r; | |
1005 | } |