/[jscoverage]/trunk/jscoverage-server.c
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Revision 339 - (show annotations)
Fri Oct 24 16:13:57 2008 UTC (9 years, 9 months ago) by siliconforks
File MIME type: text/plain
File size: 39755 byte(s)
Add support for the JS 1.6 `for each' statement.
1 /*
2 jscoverage-server.c - JSCoverage server main routine
3 Copyright (C) 2008 siliconforks.com
4
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 2 of the License, or
8 (at your option) any later version.
9
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
14
15 You should have received a copy of the GNU General Public License along
16 with this program; if not, write to the Free Software Foundation, Inc.,
17 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
18 */
19
20 #include <config.h>
21
22 #include <assert.h>
23 #include <ctype.h>
24 #include <signal.h>
25 #include <stdint.h>
26 #include <string.h>
27
28 #include <dirent.h>
29 #ifdef HAVE_PTHREAD_H
30 #include <pthread.h>
31 #endif
32
33 #include "encoding.h"
34 #include "global.h"
35 #include "http-server.h"
36 #include "instrument-js.h"
37 #include "resource-manager.h"
38 #include "stream.h"
39 #include "util.h"
40
41 static const char * specified_encoding = NULL;
42 const char * jscoverage_encoding = "ISO-8859-1";
43 bool jscoverage_highlight = true;
44
45 typedef struct SourceCache {
46 char * url;
47 uint16_t * characters;
48 size_t num_characters;
49 struct SourceCache * next;
50 } SourceCache;
51
52 static SourceCache * source_cache = NULL;
53
54 static const struct {
55 const char * extension;
56 const char * mime_type;
57 } mime_types[] = {
58 {".gif", "image/gif"},
59 {".jpg", "image/jpeg"},
60 {".jpeg", "image/jpeg"},
61 {".png", "image/png"},
62 {".css", "text/css"},
63 {".html", "text/html"},
64 {".htm", "text/html"},
65 {".js", "text/javascript"},
66 {".txt", "text/plain"},
67 {".xml", "application/xml"},
68 };
69
70 static bool verbose = false;
71 static const char * report_directory = "jscoverage-report";
72 static const char * document_root = ".";
73 static bool proxy = false;
74 static const char ** no_instrument;
75 static size_t num_no_instrument = 0;
76
77 #ifdef __MINGW32__
78 CRITICAL_SECTION javascript_mutex;
79 CRITICAL_SECTION source_cache_mutex;
80 #define LOCK EnterCriticalSection
81 #define UNLOCK LeaveCriticalSection
82 #else
83 pthread_mutex_t javascript_mutex = PTHREAD_MUTEX_INITIALIZER;
84 pthread_mutex_t source_cache_mutex = PTHREAD_MUTEX_INITIALIZER;
85 #define LOCK pthread_mutex_lock
86 #define UNLOCK pthread_mutex_unlock
87 #endif
88
89 static const SourceCache * find_cached_source(const char * url) {
90 SourceCache * result = NULL;
91 LOCK(&source_cache_mutex);
92 for (SourceCache * p = source_cache; p != NULL; p = p->next) {
93 if (strcmp(url, p->url) == 0) {
94 result = p;
95 break;
96 }
97 }
98 UNLOCK(&source_cache_mutex);
99 return result;
100 }
101
102 static void add_cached_source(const char * url, uint16_t * characters, size_t num_characters) {
103 SourceCache * new_source_cache = xmalloc(sizeof(SourceCache));
104 new_source_cache->url = xstrdup(url);
105 new_source_cache->characters = characters;
106 new_source_cache->num_characters = num_characters;
107 LOCK(&source_cache_mutex);
108 new_source_cache->next = source_cache;
109 source_cache = new_source_cache;
110 UNLOCK(&source_cache_mutex);
111 }
112
113 static int get(const char * url, uint16_t ** characters, size_t * num_characters) __attribute__((warn_unused_result));
114
115 static int get(const char * url, uint16_t ** characters, size_t * num_characters) {
116 char * host = NULL;
117 uint16_t port;
118 char * abs_path = NULL;
119 char * query = NULL;
120 HTTPConnection * connection = NULL;
121 HTTPExchange * exchange = NULL;
122 Stream * stream = NULL;
123
124 int result = URL_parse(url, &host, &port, &abs_path, &query);
125 if (result != 0) {
126 goto done;
127 }
128
129 connection = HTTPConnection_new_client(host, port);
130 if (connection == NULL) {
131 result = -1;
132 goto done;
133 }
134
135 exchange = HTTPExchange_new(connection);
136 HTTPExchange_set_request_uri(exchange, url);
137 result = HTTPExchange_write_request_headers(exchange);
138 if (result != 0) {
139 goto done;
140 }
141
142 result = HTTPExchange_read_response_headers(exchange);
143 if (result != 0) {
144 goto done;
145 }
146
147 stream = Stream_new(0);
148 result = HTTPExchange_read_entire_response_entity_body(exchange, stream);
149 if (result != 0) {
150 goto done;
151 }
152 char * encoding = HTTPMessage_get_charset(HTTPExchange_get_response_message(exchange));
153 if (encoding == NULL) {
154 encoding = xstrdup(jscoverage_encoding);
155 }
156 result = jscoverage_bytes_to_characters(encoding, stream->data, stream->length, characters, num_characters);
157 free(encoding);
158 if (result != 0) {
159 goto done;
160 }
161
162 result = 0;
163
164 done:
165 if (stream != NULL) {
166 Stream_delete(stream);
167 }
168 if (exchange != NULL) {
169 HTTPExchange_delete(exchange);
170 }
171 if (connection != NULL) {
172 if (HTTPConnection_delete(connection) != 0) {
173 HTTPServer_log_err("Warning: error closing connection after retrieving URL: %s\n", url);
174 }
175 }
176 free(host);
177 free(abs_path);
178 free(query);
179 return result;
180 }
181
182 static void send_response(HTTPExchange * exchange, uint16_t status_code, const char * html) {
183 HTTPExchange_set_status_code(exchange, status_code);
184 if (HTTPExchange_write_response(exchange, html, strlen(html)) != 0) {
185 HTTPServer_log_err("Warning: error writing to client\n");
186 }
187 }
188
189 /*
190 RFC 2396, Appendix A: we are checking for `pchar'
191 */
192 static bool is_escaped(char c) {
193 /* `pchar' */
194 if (strchr(":@&=+$,", c) != NULL) {
195 return false;
196 }
197
198 if (isalnum((unsigned char) c)) {
199 return false;
200 }
201
202 /* `mark' */
203 if (strchr("-_.!~*'()", c) != NULL) {
204 return false;
205 }
206
207 return true;
208 }
209
210 static char * encode_uri_component(const char * s) {
211 size_t length = 0;
212 for (const char * p = s; *p != '\0'; p++) {
213 if (is_escaped(*p)) {
214 length = addst(length, 3);
215 }
216 else {
217 length = addst(length, 1);
218 }
219 }
220
221 length = addst(length, 1);
222 char * result = xmalloc(length);
223 size_t i = 0;
224 for (const char * p = s; *p != '\0'; p++) {
225 if (is_escaped(*p)) {
226 result[i] = '%';
227 i++;
228 snprintf(result + i, 3, "%02X", *p);
229 i += 2;
230 }
231 else {
232 result[i] = *p;
233 i++;
234 }
235 }
236 result[i] = '\0';
237
238 return result;
239 }
240
241 static unsigned int hex_value(char c) {
242 if ('0' <= c && c <= '9') {
243 return c - '0';
244 }
245 else if ('A' <= c && c <= 'F') {
246 return c - 'A' + 10;
247 }
248 else if ('a' <= c && c <= 'f') {
249 return c - 'a' + 10;
250 }
251 else {
252 return 0;
253 }
254 }
255
256 static char * decode_uri_component(const char * s) {
257 size_t length = strlen(s);
258 char * result = xmalloc(length + 1);
259 char * p = result;
260 while (*s != '\0') {
261 if (*s == '%') {
262 if (s[1] == '\0' || s[2] == '\0') {
263 *p = '\0';
264 return result;
265 }
266 *p = hex_value(s[1]) * 16 + hex_value(s[2]);
267 s += 2;
268 }
269 else {
270 *p = *s;
271 }
272 p++;
273 s++;
274 }
275 *p = '\0';
276 return result;
277 }
278
279 static const char * get_entity(char c) {
280 switch(c) {
281 case '<':
282 return "&lt;";
283 case '>':
284 return "&gt;";
285 case '&':
286 return "&amp;";
287 case '\'':
288 return "&apos;";
289 case '"':
290 return "&quot;";
291 default:
292 return NULL;
293 }
294 }
295
296 static char * encode_html(const char * s) {
297 size_t length = 0;
298 for (const char * p = s; *p != '\0'; p++) {
299 const char * entity = get_entity(*p);
300 if (entity == NULL) {
301 length = addst(length, 1);
302 }
303 else {
304 length = addst(length, strlen(entity));
305 }
306 }
307
308 length = addst(length, 1);
309 char * result = xmalloc(length);
310 size_t i = 0;
311 for (const char * p = s; *p != '\0'; p++) {
312 const char * entity = get_entity(*p);
313 if (entity == NULL) {
314 result[i] = *p;
315 i++;
316 }
317 else {
318 strcpy(result + i, entity);
319 i += strlen(entity);
320 }
321 }
322 result[i] = '\0';
323
324 return result;
325 }
326
327 static const char * get_content_type(const char * path) {
328 char * last_dot = strrchr(path, '.');
329 if (last_dot == NULL) {
330 return "application/octet-stream";
331 }
332 for (size_t i = 0; i < sizeof(mime_types) / sizeof(mime_types[0]); i++) {
333 if (strcmp(last_dot, mime_types[i].extension) == 0) {
334 return mime_types[i].mime_type;
335 }
336 }
337 return "application/octet-stream";
338 }
339
340 /**
341 Checks whether a URI is on the no-instrument list.
342 @param uri the HTTP "Request-URI"; must not be NULL, and must not be a zero-length string
343 @return true if the URI is on the no-instrument list, false otherwise
344 */
345 static bool is_no_instrument(const char * uri) {
346 assert(*uri != '\0');
347
348 for (size_t i = 0; i < num_no_instrument; i++) {
349 if (str_starts_with(uri, no_instrument[i])) {
350 return true;
351 }
352
353 /*
354 For a local URL, accept "/foo/bar" and "foo/bar" on the no-instrument list.
355 */
356 if (! proxy && str_starts_with(uri + 1, no_instrument[i])) {
357 return true;
358 }
359 }
360
361 return false;
362 }
363
364 static bool is_javascript(HTTPExchange * exchange) {
365 const char * header = HTTPExchange_find_response_header(exchange, HTTP_CONTENT_TYPE);
366 if (header == NULL) {
367 /* guess based on extension */
368 return str_ends_with(HTTPExchange_get_request_uri(exchange), ".js");
369 }
370 else {
371 char * semicolon = strchr(header, ';');
372 char * content_type;
373 if (semicolon == NULL) {
374 content_type = xstrdup(header);
375 }
376 else {
377 content_type = xstrndup(header, semicolon - header);
378 }
379 /* RFC 4329 */
380 bool result = strcmp(content_type, "text/javascript") == 0 ||
381 strcmp(content_type, "text/ecmascript") == 0 ||
382 strcmp(content_type, "text/javascript1.0") == 0 ||
383 strcmp(content_type, "text/javascript1.1") == 0 ||
384 strcmp(content_type, "text/javascript1.2") == 0 ||
385 strcmp(content_type, "text/javascript1.3") == 0 ||
386 strcmp(content_type, "text/javascript1.4") == 0 ||
387 strcmp(content_type, "text/javascript1.5") == 0 ||
388 strcmp(content_type, "text/jscript") == 0 ||
389 strcmp(content_type, "text/livescript") == 0 ||
390 strcmp(content_type, "text/x-javascript") == 0 ||
391 strcmp(content_type, "text/x-ecmascript") == 0 ||
392 strcmp(content_type, "application/x-javascript") == 0 ||
393 strcmp(content_type, "application/x-ecmascript") == 0 ||
394 strcmp(content_type, "application/javascript") == 0 ||
395 strcmp(content_type, "application/ecmascript") == 0;
396 free(content_type);
397 return result;
398 }
399 }
400
401 static bool should_instrument_request(HTTPExchange * exchange) {
402 if (! is_javascript(exchange)) {
403 return false;
404 }
405
406 if (is_no_instrument(HTTPExchange_get_request_uri(exchange))) {
407 return false;
408 }
409
410 return true;
411 }
412
413 static int merge(Coverage * coverage, FILE * f) __attribute__((warn_unused_result));
414
415 static int merge(Coverage * coverage, FILE * f) {
416 Stream * stream = Stream_new(0);
417 Stream_write_file_contents(stream, f);
418
419 LOCK(&javascript_mutex);
420 int result = jscoverage_parse_json(coverage, stream->data, stream->length);
421 UNLOCK(&javascript_mutex);
422
423 Stream_delete(stream);
424 return result;
425 }
426
427 static void write_js_quoted_string(FILE * f, char * data, size_t length) {
428 putc('"', f);
429 for (size_t i = 0; i < length; i++) {
430 char c = data[i];
431 switch (c) {
432 case '\b':
433 fputs("\\b", f);
434 break;
435 case '\f':
436 fputs("\\f", f);
437 break;
438 case '\n':
439 fputs("\\n", f);
440 break;
441 case '\r':
442 fputs("\\r", f);
443 break;
444 case '\t':
445 fputs("\\t", f);
446 break;
447 /* IE doesn't support this */
448 /*
449 case '\v':
450 fputs("\\v", f);
451 break;
452 */
453 case '"':
454 fputs("\\\"", f);
455 break;
456 case '\\':
457 fputs("\\\\", f);
458 break;
459 default:
460 putc(c, f);
461 break;
462 }
463 }
464 putc('"', f);
465 }
466
467 static void write_source(const char * id, const uint16_t * characters, size_t num_characters, FILE * f) {
468 Stream * output = Stream_new(num_characters);
469 jscoverage_write_source(id, characters, num_characters, output);
470 fwrite(output->data, 1, output->length, f);
471 Stream_delete(output);
472 }
473
474 static void write_json_for_file(const FileCoverage * file_coverage, int i, void * p) {
475 FILE * f = p;
476
477 if (i > 0) {
478 putc(',', f);
479 }
480
481 write_js_quoted_string(f, file_coverage->id, strlen(file_coverage->id));
482
483 fputs(":{\"coverage\":[", f);
484 for (uint32_t i = 0; i < file_coverage->num_coverage_lines; i++) {
485 if (i > 0) {
486 putc(',', f);
487 }
488 int timesExecuted = file_coverage->coverage_lines[i];
489 if (timesExecuted < 0) {
490 fputs("null", f);
491 }
492 else {
493 fprintf(f, "%d", timesExecuted);
494 }
495 }
496 fputs("],\"source\":", f);
497 if (file_coverage->source_lines == NULL) {
498 if (proxy) {
499 const SourceCache * cached = find_cached_source(file_coverage->id);
500 if (cached == NULL) {
501 uint16_t * characters;
502 size_t num_characters;
503 if (get(file_coverage->id, &characters, &num_characters) == 0) {
504 write_source(file_coverage->id, characters, num_characters, f);
505 add_cached_source(file_coverage->id, characters, num_characters);
506 }
507 else {
508 fputs("[]", f);
509 HTTPServer_log_err("Warning: cannot retrieve URL: %s\n", file_coverage->id);
510 }
511 }
512 else {
513 write_source(file_coverage->id, cached->characters, cached->num_characters, f);
514 }
515 }
516 else {
517 /* check that the path begins with / */
518 if (file_coverage->id[0] == '/') {
519 char * source_path = make_path(document_root, file_coverage->id + 1);
520 FILE * source_file = fopen(source_path, "rb");
521 free(source_path);
522 if (source_file == NULL) {
523 fputs("[]", f);
524 HTTPServer_log_err("Warning: cannot open file: %s\n", file_coverage->id);
525 }
526 else {
527 Stream * stream = Stream_new(0);
528 Stream_write_file_contents(stream, source_file);
529 fclose(source_file);
530 uint16_t * characters;
531 size_t num_characters;
532 int result = jscoverage_bytes_to_characters(jscoverage_encoding, stream->data, stream->length, &characters, &num_characters);
533 Stream_delete(stream);
534 if (result == JSCOVERAGE_ERROR_ENCODING_NOT_SUPPORTED) {
535 fputs("[]", f);
536 HTTPServer_log_err("Warning: encoding %s not supported\n", jscoverage_encoding);
537 }
538 else if (result == JSCOVERAGE_ERROR_INVALID_BYTE_SEQUENCE) {
539 fputs("[]", f);
540 HTTPServer_log_err("Warning: error decoding %s in file %s\n", jscoverage_encoding, file_coverage->id);
541 }
542 else {
543 write_source(file_coverage->id, characters, num_characters, f);
544 free(characters);
545 }
546 }
547 }
548 else {
549 /* path does not begin with / */
550 fputs("[]", f);
551 HTTPServer_log_err("Warning: invalid source path: %s\n", file_coverage->id);
552 }
553 }
554 }
555 else {
556 fputc('[', f);
557 for (uint32_t i = 0; i < file_coverage->num_source_lines; i++) {
558 if (i > 0) {
559 fputc(',', f);
560 }
561 char * source_line = file_coverage->source_lines[i];
562 write_js_quoted_string(f, source_line, strlen(source_line));
563 }
564 fputc(']', f);
565 }
566 fputc('}', f);
567 }
568
569 static int write_json(Coverage * coverage, const char * path) __attribute__((warn_unused_result));
570
571 static int write_json(Coverage * coverage, const char * path) {
572 /* write the JSON */
573 FILE * f = fopen(path, "wb");
574 if (f == NULL) {
575 return -1;
576 }
577 putc('{', f);
578 Coverage_foreach_file(coverage, write_json_for_file, f);
579 putc('}', f);
580 if (fclose(f) == EOF) {
581 return -1;
582 }
583 return 0;
584 }
585
586 static void handle_jscoverage_request(HTTPExchange * exchange) {
587 /* set the `Server' response-header (RFC 2616 14.38, 3.8) */
588 HTTPExchange_set_response_header(exchange, HTTP_SERVER, "jscoverage-server/" VERSION);
589
590 const char * abs_path = HTTPExchange_get_abs_path(exchange);
591 assert(*abs_path != '\0');
592 if (str_starts_with(abs_path, "/jscoverage-store")) {
593 if (strcmp(HTTPExchange_get_method(exchange), "POST") != 0) {
594 HTTPExchange_set_response_header(exchange, HTTP_ALLOW, "POST");
595 send_response(exchange, 405, "Method not allowed\n");
596 return;
597 }
598
599 Stream * json = Stream_new(0);
600
601 /* read the POST body */
602 if (HTTPExchange_read_entire_request_entity_body(exchange, json) != 0) {
603 Stream_delete(json);
604 send_response(exchange, 400, "Could not read request body\n");
605 return;
606 }
607
608 Coverage * coverage = Coverage_new();
609 LOCK(&javascript_mutex);
610 int result = jscoverage_parse_json(coverage, json->data, json->length);
611 UNLOCK(&javascript_mutex);
612 Stream_delete(json);
613
614 if (result != 0) {
615 Coverage_delete(coverage);
616 send_response(exchange, 400, "Could not parse coverage data\n");
617 return;
618 }
619
620 mkdir_if_necessary(report_directory);
621 char * current_report_directory;
622 if (str_starts_with(abs_path, "/jscoverage-store/") && abs_path[18] != '\0') {
623 char * dir = decode_uri_component(abs_path + 18);
624 current_report_directory = make_path(report_directory, dir);
625 free(dir);
626 }
627 else {
628 current_report_directory = xstrdup(report_directory);
629 }
630 mkdir_if_necessary(current_report_directory);
631 char * path = make_path(current_report_directory, "jscoverage.json");
632
633 /* check if the JSON file exists */
634 struct stat buf;
635 if (stat(path, &buf) == 0) {
636 /* it exists: merge */
637 FILE * f = fopen(path, "rb");
638 if (f == NULL) {
639 result = 1;
640 }
641 else {
642 result = merge(coverage, f);
643 if (fclose(f) == EOF) {
644 result = 1;
645 }
646 }
647 if (result != 0) {
648 free(current_report_directory);
649 free(path);
650 Coverage_delete(coverage);
651 send_response(exchange, 500, "Could not merge with existing coverage data\n");
652 return;
653 }
654 }
655
656 result = write_json(coverage, path);
657 free(path);
658 Coverage_delete(coverage);
659 if (result != 0) {
660 free(current_report_directory);
661 send_response(exchange, 500, "Could not write coverage data\n");
662 return;
663 }
664
665 /* copy other files */
666 jscoverage_copy_resources(current_report_directory);
667 path = make_path(current_report_directory, "jscoverage.js");
668 free(current_report_directory);
669 FILE * f = fopen(path, "ab");
670 free(path);
671 if (f == NULL) {
672 send_response(exchange, 500, "Could not write to file: jscoverage.js\n");
673 return;
674 }
675 fputs("jscoverage_isReport = true;\r\n", f);
676 if (fclose(f) == EOF) {
677 send_response(exchange, 500, "Could not write to file: jscoverage.js\n");
678 return;
679 }
680
681 send_response(exchange, 200, "Coverage data stored\n");
682 }
683 else if (str_starts_with(abs_path, "/jscoverage-shutdown")) {
684 if (strcmp(HTTPExchange_get_method(exchange), "POST") != 0) {
685 HTTPExchange_set_response_header(exchange, HTTP_ALLOW, "POST");
686 send_response(exchange, 405, "Method not allowed\n");
687 return;
688 }
689
690 /* allow only from localhost */
691 struct sockaddr_in client;
692 if (HTTPExchange_get_peer(exchange, &client) != 0) {
693 send_response(exchange, 500, "Cannot get client address\n");
694 return;
695 }
696 if (client.sin_addr.s_addr != htonl(INADDR_LOOPBACK)) {
697 send_response(exchange, 403, "This operation can be performed only by localhost\n");
698 return;
699 }
700
701 send_response(exchange, 200, "The server will now shut down\n");
702 HTTPServer_shutdown();
703 }
704 else {
705 const char * path = abs_path + 1;
706 const struct Resource * resource = get_resource(path);
707 if (resource == NULL) {
708 send_response(exchange, 404, "Not found\n");
709 return;
710 }
711 HTTPExchange_set_response_header(exchange, HTTP_CONTENT_TYPE, get_content_type(path));
712 if (HTTPExchange_write_response(exchange, resource->data, resource->length) != 0) {
713 HTTPServer_log_err("Warning: error writing to client\n");
714 return;
715 }
716 if (strcmp(abs_path, "/jscoverage.js") == 0) {
717 const char * s = "jscoverage_isServer = true;\r\n";
718 if (HTTPExchange_write_response(exchange, s, strlen(s)) != 0) {
719 HTTPServer_log_err("Warning: error writing to client\n");
720 }
721 }
722 }
723 }
724
725 static void instrument_js(const char * id, const uint16_t * characters, size_t num_characters, Stream * output_stream) {
726 const struct Resource * resource = get_resource("report.js");
727 Stream_write(output_stream, resource->data, resource->length);
728
729 LOCK(&javascript_mutex);
730 jscoverage_instrument_js(id, characters, num_characters, output_stream);
731 UNLOCK(&javascript_mutex);
732 }
733
734 static bool is_hop_by_hop_header(const char * h) {
735 /* hop-by-hop headers (RFC 2616 13.5.1) */
736 return strcasecmp(h, HTTP_CONNECTION) == 0 ||
737 strcasecmp(h, "Keep-Alive") == 0 ||
738 strcasecmp(h, HTTP_PROXY_AUTHENTICATE) == 0 ||
739 strcasecmp(h, HTTP_PROXY_AUTHORIZATION) == 0 ||
740 strcasecmp(h, HTTP_TE) == 0 ||
741 strcasecmp(h, HTTP_TRAILER) == 0 ||
742 strcasecmp(h, HTTP_TRANSFER_ENCODING) == 0 ||
743 strcasecmp(h, HTTP_UPGRADE) == 0;
744 }
745
746 static void add_via_header(HTTPMessage * message, const char * version) {
747 char * value;
748 xasprintf(&value, "%s jscoverage-server", version);
749 HTTPMessage_add_header(message, HTTP_VIA, value);
750 free(value);
751 }
752
753 static int copy_http_message_body(HTTPMessage * from, HTTPMessage * to) __attribute__((warn_unused_result));
754
755 static int copy_http_message_body(HTTPMessage * from, HTTPMessage * to) {
756 uint8_t * buffer[8192];
757 for (;;) {
758 size_t bytes_read;
759 int result = HTTPMessage_read_message_body(from, buffer, 8192, &bytes_read);
760 if (result != 0) {
761 return result;
762 }
763 if (bytes_read == 0) {
764 return 0;
765 }
766 result = HTTPMessage_write(to, buffer, bytes_read);
767 if (result != 0) {
768 return result;
769 }
770 }
771 }
772
773 static void handle_proxy_request(HTTPExchange * client_exchange) {
774 HTTPConnection * server_connection = NULL;
775 HTTPExchange * server_exchange = NULL;
776
777 const char * abs_path = HTTPExchange_get_abs_path(client_exchange);
778 if (str_starts_with(abs_path, "/jscoverage")) {
779 handle_jscoverage_request(client_exchange);
780 return;
781 }
782
783 const char * host = HTTPExchange_get_host(client_exchange);
784 uint16_t port = HTTPExchange_get_port(client_exchange);
785
786 /* create a new connection */
787 server_connection = HTTPConnection_new_client(host, port);
788 if (server_connection == NULL) {
789 send_response(client_exchange, 504, "Could not connect to server\n");
790 goto done;
791 }
792
793 /* create a new exchange */
794 server_exchange = HTTPExchange_new(server_connection);
795 HTTPExchange_set_method(server_exchange, HTTPExchange_get_method(client_exchange));
796 HTTPExchange_set_request_uri(server_exchange, HTTPExchange_get_request_uri(client_exchange));
797 for (const HTTPHeader * h = HTTPExchange_get_request_headers(client_exchange); h != NULL; h = h->next) {
798 if (strcasecmp(h->name, HTTP_TRAILER) == 0 || strcasecmp(h->name, HTTP_TRANSFER_ENCODING) == 0) {
799 /* do nothing: we want to keep this header */
800 }
801 else if (is_hop_by_hop_header(h->name) ||
802 strcasecmp(h->name, HTTP_ACCEPT_ENCODING) == 0 ||
803 strcasecmp(h->name, HTTP_RANGE) == 0) {
804 continue;
805 }
806 HTTPExchange_add_request_header(server_exchange, h->name, h->value);
807 }
808 add_via_header(HTTPExchange_get_request_message(server_exchange), HTTPExchange_get_request_http_version(client_exchange));
809
810 /* send the request */
811 if (HTTPExchange_write_request_headers(server_exchange) != 0) {
812 send_response(client_exchange, 502, "Could not write to server\n");
813 goto done;
814 }
815
816 /* handle POST or PUT */
817 if (HTTPExchange_request_has_body(client_exchange)) {
818 HTTPMessage * client_request = HTTPExchange_get_request_message(client_exchange);
819 HTTPMessage * server_request = HTTPExchange_get_request_message(server_exchange);
820 if (copy_http_message_body(client_request, server_request) != 0) {
821 send_response(client_exchange, 400, "Error copying request body from client to server\n");
822 goto done;
823 }
824 }
825
826 if (HTTPExchange_flush_request(server_exchange) != 0) {
827 send_response(client_exchange, 502, "Could not write to server\n");
828 goto done;
829 }
830
831 /* receive the response */
832 if (HTTPExchange_read_response_headers(server_exchange) != 0) {
833 send_response(client_exchange, 502, "Could not read headers from server\n");
834 goto done;
835 }
836
837 HTTPExchange_set_status_code(client_exchange, HTTPExchange_get_status_code(server_exchange));
838
839 if (HTTPExchange_response_has_body(server_exchange) && should_instrument_request(server_exchange)) {
840 /* needs instrumentation */
841 Stream * input_stream = Stream_new(0);
842 if (HTTPExchange_read_entire_response_entity_body(server_exchange, input_stream) != 0) {
843 Stream_delete(input_stream);
844 send_response(client_exchange, 502, "Could not read body from server\n");
845 goto done;
846 }
847
848 const char * request_uri = HTTPExchange_get_request_uri(client_exchange);
849 char * encoding = HTTPMessage_get_charset(HTTPExchange_get_response_message(server_exchange));
850 if (encoding == NULL) {
851 encoding = xstrdup(jscoverage_encoding);
852 }
853 uint16_t * characters;
854 size_t num_characters;
855 int result = jscoverage_bytes_to_characters(encoding, input_stream->data, input_stream->length, &characters, &num_characters);
856 free(encoding);
857 Stream_delete(input_stream);
858 if (result == JSCOVERAGE_ERROR_ENCODING_NOT_SUPPORTED) {
859 send_response(client_exchange, 500, "Encoding not supported\n");
860 goto done;
861 }
862 else if (result == JSCOVERAGE_ERROR_INVALID_BYTE_SEQUENCE) {
863 send_response(client_exchange, 502, "Error decoding response\n");
864 goto done;
865 }
866
867 Stream * output_stream = Stream_new(0);
868 instrument_js(request_uri, characters, num_characters, output_stream);
869
870 /* send the headers to the client */
871 for (const HTTPHeader * h = HTTPExchange_get_response_headers(server_exchange); h != NULL; h = h->next) {
872 if (is_hop_by_hop_header(h->name) || strcasecmp(h->name, HTTP_CONTENT_LENGTH) == 0) {
873 continue;
874 }
875 else if (strcasecmp(h->name, HTTP_CONTENT_TYPE) == 0) {
876 HTTPExchange_add_response_header(client_exchange, HTTP_CONTENT_TYPE, "text/javascript; charset=ISO-8859-1");
877 continue;
878 }
879 HTTPExchange_add_response_header(client_exchange, h->name, h->value);
880 }
881 add_via_header(HTTPExchange_get_response_message(client_exchange), HTTPExchange_get_response_http_version(server_exchange));
882 HTTPExchange_set_response_content_length(client_exchange, output_stream->length);
883
884 /* send the instrumented code to the client */
885 if (HTTPExchange_write_response(client_exchange, output_stream->data, output_stream->length) != 0) {
886 HTTPServer_log_err("Warning: error writing to client\n");
887 }
888
889 /* characters go on the cache */
890 /*
891 free(characters);
892 */
893 Stream_delete(output_stream);
894 add_cached_source(request_uri, characters, num_characters);
895 }
896 else {
897 /* does not need instrumentation */
898
899 /* send the headers to the client */
900 for (const HTTPHeader * h = HTTPExchange_get_response_headers(server_exchange); h != NULL; h = h->next) {
901 if (strcasecmp(h->name, HTTP_TRAILER) == 0 || strcasecmp(h->name, HTTP_TRANSFER_ENCODING) == 0) {
902 /* do nothing: we want to keep this header */
903 }
904 else if (is_hop_by_hop_header(h->name)) {
905 continue;
906 }
907 HTTPExchange_add_response_header(client_exchange, h->name, h->value);
908 }
909 add_via_header(HTTPExchange_get_response_message(client_exchange), HTTPExchange_get_response_http_version(server_exchange));
910
911 if (HTTPExchange_write_response_headers(client_exchange) != 0) {
912 HTTPServer_log_err("Warning: error writing to client\n");
913 goto done;
914 }
915
916 if (HTTPExchange_response_has_body(server_exchange)) {
917 /* read the body from the server and send it to the client */
918 HTTPMessage * client_response = HTTPExchange_get_response_message(client_exchange);
919 HTTPMessage * server_response = HTTPExchange_get_response_message(server_exchange);
920 if (copy_http_message_body(server_response, client_response) != 0) {
921 HTTPServer_log_err("Warning: error copying response body from server to client\n");
922 goto done;
923 }
924 }
925 }
926
927 done:
928 if (server_exchange != NULL) {
929 HTTPExchange_delete(server_exchange);
930 }
931 if (server_connection != NULL) {
932 if (HTTPConnection_delete(server_connection) != 0) {
933 HTTPServer_log_err("Warning: error closing connection to server\n");
934 }
935 }
936 }
937
938 static void handle_local_request(HTTPExchange * exchange) {
939 /* add the `Server' response-header (RFC 2616 14.38, 3.8) */
940 HTTPExchange_add_response_header(exchange, HTTP_SERVER, "jscoverage-server/" VERSION);
941
942 char * decoded_path = NULL;
943 char * filesystem_path = NULL;
944
945 const char * abs_path = HTTPExchange_get_abs_path(exchange);
946 assert(*abs_path != '\0');
947
948 decoded_path = decode_uri_component(abs_path);
949
950 if (str_starts_with(decoded_path, "/jscoverage")) {
951 handle_jscoverage_request(exchange);
952 goto done;
953 }
954
955 if (strstr(decoded_path, "..") != NULL) {
956 send_response(exchange, 403, "Forbidden\n");
957 goto done;
958 }
959
960 filesystem_path = make_path(document_root, decoded_path + 1);
961 size_t filesystem_path_length = strlen(filesystem_path);
962 if (filesystem_path_length > 0 && filesystem_path[filesystem_path_length - 1] == '/') {
963 /* stat on Windows doesn't work with trailing slash */
964 filesystem_path[filesystem_path_length - 1] = '\0';
965 }
966
967 struct stat buf;
968 if (stat(filesystem_path, &buf) == -1) {
969 send_response(exchange, 404, "Not found\n");
970 goto done;
971 }
972
973 if (S_ISDIR(buf.st_mode)) {
974 if (abs_path[strlen(abs_path) - 1] != '/') {
975 const char * request_uri = HTTPExchange_get_request_uri(exchange);
976 char * uri = xmalloc(strlen(request_uri) + 2);
977 strcpy(uri, request_uri);
978 strcat(uri, "/");
979 HTTPExchange_add_response_header(exchange, "Location", uri);
980 free(uri);
981 send_response(exchange, 301, "Moved permanently\n");
982 goto done;
983 }
984
985 DIR * d = opendir(filesystem_path);
986 if (d == NULL) {
987 send_response(exchange, 404, "Not found\n");
988 goto done;
989 }
990
991 struct dirent * entry;
992 while ((entry = readdir(d)) != NULL) {
993 char * href = encode_uri_component(entry->d_name);
994 char * html_href = encode_html(href);
995 char * link = encode_html(entry->d_name);
996 char * directory_entry;
997 xasprintf(&directory_entry, "<a href=\"%s\">%s</a><br>\n", html_href, link);
998 if (HTTPExchange_write_response(exchange, directory_entry, strlen(directory_entry)) != 0) {
999 HTTPServer_log_err("Warning: error writing to client\n");
1000 }
1001 free(directory_entry);
1002 free(href);
1003 free(html_href);
1004 free(link);
1005 }
1006 closedir(d);
1007 }
1008 else if (S_ISREG(buf.st_mode)) {
1009 FILE * f = fopen(filesystem_path, "rb");
1010 if (f == NULL) {
1011 send_response(exchange, 404, "Not found\n");
1012 goto done;
1013 }
1014
1015 /*
1016 When do we send a charset with Content-Type?
1017 if Content-Type is "text" or "application"
1018 if instrumented JavaScript
1019 use Content-Type: application/javascript; charset=ISO-8859-1
1020 else if --encoding is given
1021 use that encoding
1022 else
1023 send no charset
1024 else
1025 send no charset
1026 */
1027 const char * content_type = get_content_type(filesystem_path);
1028 if (strcmp(content_type, "text/javascript") == 0 && ! is_no_instrument(abs_path)) {
1029 HTTPExchange_set_response_header(exchange, HTTP_CONTENT_TYPE, "text/javascript; charset=ISO-8859-1");
1030
1031 Stream * input_stream = Stream_new(0);
1032 Stream_write_file_contents(input_stream, f);
1033
1034 uint16_t * characters;
1035 size_t num_characters;
1036 int result = jscoverage_bytes_to_characters(jscoverage_encoding, input_stream->data, input_stream->length, &characters, &num_characters);
1037 Stream_delete(input_stream);
1038
1039 if (result == JSCOVERAGE_ERROR_ENCODING_NOT_SUPPORTED) {
1040 send_response(exchange, 500, "Encoding not supported\n");
1041 goto done;
1042 }
1043 else if (result == JSCOVERAGE_ERROR_INVALID_BYTE_SEQUENCE) {
1044 send_response(exchange, 500, "Error decoding JavaScript file\n");
1045 goto done;
1046 }
1047
1048 Stream * output_stream = Stream_new(0);
1049 instrument_js(abs_path, characters, num_characters, output_stream);
1050 free(characters);
1051
1052 if (HTTPExchange_write_response(exchange, output_stream->data, output_stream->length) != 0) {
1053 HTTPServer_log_err("Warning: error writing to client\n");
1054 }
1055 Stream_delete(output_stream);
1056 }
1057 else {
1058 /* send the Content-Type with charset if necessary */
1059 if (specified_encoding != NULL && (str_starts_with(content_type, "text/") || str_starts_with(content_type, "application/"))) {
1060 char * content_type_with_charset = NULL;
1061 xasprintf(&content_type_with_charset, "%s; charset=%s", content_type, specified_encoding);
1062 HTTPExchange_set_response_header(exchange, HTTP_CONTENT_TYPE, content_type_with_charset);
1063 free(content_type_with_charset);
1064 }
1065 else {
1066 HTTPExchange_set_response_header(exchange, HTTP_CONTENT_TYPE, content_type);
1067 }
1068
1069 char buffer[8192];
1070 size_t bytes_read;
1071 while ((bytes_read = fread(buffer, 1, 8192, f)) > 0) {
1072 if (HTTPExchange_write_response(exchange, buffer, bytes_read) != 0) {
1073 HTTPServer_log_err("Warning: error writing to client\n");
1074 }
1075 }
1076 }
1077 fclose(f);
1078 }
1079 else {
1080 send_response(exchange, 404, "Not found\n");
1081 goto done;
1082 }
1083
1084 done:
1085 free(filesystem_path);
1086 free(decoded_path);
1087 }
1088
1089 static void handler(HTTPExchange * exchange) {
1090 if (verbose) {
1091 HTTPServer_log_out("%s", HTTPExchange_get_request_line(exchange));
1092 }
1093
1094 if (proxy) {
1095 handle_proxy_request(exchange);
1096 }
1097 else {
1098 handle_local_request(exchange);
1099 }
1100 }
1101
1102 int main(int argc, char ** argv) {
1103 program = "jscoverage-server";
1104
1105 const char * ip_address = "127.0.0.1";
1106 const char * port = "8080";
1107 int shutdown = 0;
1108
1109 no_instrument = xnew(const char *, argc - 1);
1110
1111 for (int i = 1; i < argc; i++) {
1112 if (strcmp(argv[i], "-h") == 0 || strcmp(argv[i], "--help") == 0) {
1113 copy_resource_to_stream("jscoverage-server-help.txt", stdout);
1114 exit(EXIT_SUCCESS);
1115 }
1116 else if (strcmp(argv[i], "-V") == 0 || strcmp(argv[i], "--version") == 0) {
1117 version();
1118 }
1119 else if (strcmp(argv[i], "-v") == 0 || strcmp(argv[i], "--verbose") == 0) {
1120 verbose = 1;
1121 }
1122
1123 else if (strcmp(argv[i], "--report-dir") == 0) {
1124 i++;
1125 if (i == argc) {
1126 fatal_command_line("--report-dir: option requires an argument");
1127 }
1128 report_directory = argv[i];
1129 }
1130 else if (strncmp(argv[i], "--report-dir=", 13) == 0) {
1131 report_directory = argv[i] + 13;
1132 }
1133
1134 else if (strcmp(argv[i], "--document-root") == 0) {
1135 i++;
1136 if (i == argc) {
1137 fatal_command_line("--document-root: option requires an argument");
1138 }
1139 document_root = argv[i];
1140 }
1141 else if (strncmp(argv[i], "--document-root=", 16) == 0) {
1142 document_root = argv[i] + 16;
1143 }
1144
1145 else if (strcmp(argv[i], "--encoding") == 0) {
1146 i++;
1147 if (i == argc) {
1148 fatal_command_line("--encoding: option requires an argument");
1149 }
1150 jscoverage_encoding = argv[i];
1151 specified_encoding = jscoverage_encoding;
1152 }
1153 else if (strncmp(argv[i], "--encoding=", 11) == 0) {
1154 jscoverage_encoding = argv[i] + 11;
1155 specified_encoding = jscoverage_encoding;
1156 }
1157
1158 else if (strcmp(argv[i], "--ip-address") == 0) {
1159 i++;
1160 if (i == argc) {
1161 fatal_command_line("--ip-address: option requires an argument");
1162 }
1163 ip_address = argv[i];
1164 }
1165 else if (strncmp(argv[i], "--ip-address=", 13) == 0) {
1166 ip_address = argv[i] + 13;
1167 }
1168
1169 else if (strcmp(argv[i], "--js-version") == 0) {
1170 i++;
1171 if (i == argc) {
1172 fatal_command_line("--js-version: option requires an argument");
1173 }
1174 jscoverage_set_js_version(argv[i]);
1175 }
1176 else if (strncmp(argv[i], "--js-version=", 13) == 0) {
1177 jscoverage_set_js_version(argv[i] + 13);
1178 }
1179
1180 else if (strcmp(argv[i], "--no-highlight") == 0) {
1181 jscoverage_highlight = false;
1182 }
1183
1184 else if (strcmp(argv[i], "--no-instrument") == 0) {
1185 i++;
1186 if (i == argc) {
1187 fatal_command_line("--no-instrument: option requires an argument");
1188 }
1189 no_instrument[num_no_instrument] = argv[i];
1190 num_no_instrument++;
1191 }
1192 else if (strncmp(argv[i], "--no-instrument=", 16) == 0) {
1193 no_instrument[num_no_instrument] = argv[i] + 16;
1194 num_no_instrument++;
1195 }
1196
1197 else if (strcmp(argv[i], "--port") == 0) {
1198 i++;
1199 if (i == argc) {
1200 fatal_command_line("--port: option requires an argument");
1201 }
1202 port = argv[i];
1203 }
1204 else if (strncmp(argv[i], "--port=", 7) == 0) {
1205 port = argv[i] + 7;
1206 }
1207
1208 else if (strcmp(argv[i], "--proxy") == 0) {
1209 proxy = 1;
1210 }
1211
1212 else if (strcmp(argv[i], "--shutdown") == 0) {
1213 shutdown = 1;
1214 }
1215
1216 else if (strncmp(argv[i], "-", 1) == 0) {
1217 fatal_command_line("unrecognized option `%s'", argv[i]);
1218 }
1219 else {
1220 fatal_command_line("too many arguments");
1221 }
1222 }
1223
1224 /* check the port */
1225 char * end;
1226 unsigned long numeric_port = strtoul(port, &end, 10);
1227 if (*end != '\0') {
1228 fatal_command_line("--port: option must be an integer");
1229 }
1230 if (numeric_port > UINT16_MAX) {
1231 fatal_command_line("--port: option must be 16 bits");
1232 }
1233
1234 /* is this a shutdown? */
1235 if (shutdown) {
1236 #ifdef __MINGW32__
1237 WSADATA data;
1238 if (WSAStartup(MAKEWORD(1, 1), &data) != 0) {
1239 fatal("could not start Winsock");
1240 }
1241 #endif
1242
1243 /* INADDR_LOOPBACK */
1244 HTTPConnection * connection = HTTPConnection_new_client("127.0.0.1", numeric_port);
1245 if (connection == NULL) {
1246 fatal("could not connect to server");
1247 }
1248 HTTPExchange * exchange = HTTPExchange_new(connection);
1249 HTTPExchange_set_method(exchange, "POST");
1250 HTTPExchange_set_request_uri(exchange, "/jscoverage-shutdown");
1251 if (HTTPExchange_write_request_headers(exchange) != 0) {
1252 fatal("could not write request headers to server");
1253 }
1254 if (HTTPExchange_read_response_headers(exchange) != 0) {
1255 fatal("could not read response headers from server");
1256 }
1257 Stream * stream = Stream_new(0);
1258 if (HTTPExchange_read_entire_response_entity_body(exchange, stream) != 0) {
1259 fatal("could not read response body from server");
1260 }
1261 fwrite(stream->data, 1, stream->length, stdout);
1262 Stream_delete(stream);
1263 HTTPExchange_delete(exchange);
1264 if (HTTPConnection_delete(connection) != 0) {
1265 fatal("could not close connection with server");
1266 }
1267 exit(EXIT_SUCCESS);
1268 }
1269
1270 jscoverage_init();
1271
1272 #ifndef __MINGW32__
1273 /* handle broken pipe */
1274 signal(SIGPIPE, SIG_IGN);
1275 #endif
1276
1277 #ifdef __MINGW32__
1278 InitializeCriticalSection(&javascript_mutex);
1279 InitializeCriticalSection(&source_cache_mutex);
1280 #endif
1281
1282 if (verbose) {
1283 printf("Starting HTTP server on %s:%lu\n", ip_address, numeric_port);
1284 fflush(stdout);
1285 }
1286 HTTPServer_run(ip_address, (uint16_t) numeric_port, handler);
1287 if (verbose) {
1288 printf("Stopping HTTP server\n");
1289 fflush(stdout);
1290 }
1291
1292 jscoverage_cleanup();
1293
1294 free(no_instrument);
1295
1296 LOCK(&source_cache_mutex);
1297 while (source_cache != NULL) {
1298 SourceCache * p = source_cache;
1299 source_cache = source_cache->next;
1300 free(p->url);
1301 free(p->characters);
1302 free(p);
1303 }
1304 UNLOCK(&source_cache_mutex);
1305
1306 return 0;
1307 }

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