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