/[jscoverage]/trunk/jscoverage-server.c
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Revision 312 - (show annotations)
Mon Oct 13 17:52:01 2008 UTC (10 years, 1 month ago) by siliconforks
File MIME type: text/plain
File size: 39378 byte(s)
If the proxy does not support an encoding provided by the origin server, status is 500, not 502.
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 case '\v':
448 fputs("\\v", f);
449 break;
450 case '"':
451 fputs("\\\"", f);
452 break;
453 case '\\':
454 fputs("\\\\", f);
455 break;
456 default:
457 putc(c, f);
458 break;
459 }
460 }
461 putc('"', f);
462 }
463
464 static void write_source(const char * id, const uint16_t * characters, size_t num_characters, FILE * f) {
465 Stream * output = Stream_new(num_characters);
466 jscoverage_write_source(id, characters, num_characters, output);
467 fwrite(output->data, 1, output->length, f);
468 Stream_delete(output);
469 }
470
471 static void write_json_for_file(const FileCoverage * file_coverage, int i, void * p) {
472 FILE * f = p;
473
474 if (i > 0) {
475 putc(',', f);
476 }
477
478 write_js_quoted_string(f, file_coverage->id, strlen(file_coverage->id));
479
480 fputs(":{\"coverage\":[", f);
481 for (uint32_t i = 0; i < file_coverage->num_coverage_lines; i++) {
482 if (i > 0) {
483 putc(',', f);
484 }
485 int timesExecuted = file_coverage->coverage_lines[i];
486 if (timesExecuted < 0) {
487 fputs("null", f);
488 }
489 else {
490 fprintf(f, "%d", timesExecuted);
491 }
492 }
493 fputs("],\"source\":", f);
494 if (file_coverage->source_lines == NULL) {
495 if (proxy) {
496 const SourceCache * cached = find_cached_source(file_coverage->id);
497 if (cached == NULL) {
498 uint16_t * characters;
499 size_t num_characters;
500 if (get(file_coverage->id, &characters, &num_characters) == 0) {
501 write_source(file_coverage->id, characters, num_characters, f);
502 add_cached_source(file_coverage->id, characters, num_characters);
503 }
504 else {
505 fputs("[]", f);
506 HTTPServer_log_err("Warning: cannot retrieve URL: %s\n", file_coverage->id);
507 }
508 }
509 else {
510 write_source(file_coverage->id, cached->characters, cached->num_characters, f);
511 }
512 }
513 else {
514 /* check that the path begins with / */
515 if (file_coverage->id[0] == '/') {
516 char * source_path = make_path(document_root, file_coverage->id + 1);
517 FILE * source_file = fopen(source_path, "rb");
518 free(source_path);
519 if (source_file == NULL) {
520 fputs("[]", f);
521 HTTPServer_log_err("Warning: cannot open file: %s\n", file_coverage->id);
522 }
523 else {
524 Stream * stream = Stream_new(0);
525 Stream_write_file_contents(stream, source_file);
526 fclose(source_file);
527 uint16_t * characters;
528 size_t num_characters;
529 int result = jscoverage_bytes_to_characters(jscoverage_encoding, stream->data, stream->length, &characters, &num_characters);
530 Stream_delete(stream);
531 if (result == JSCOVERAGE_ERROR_ENCODING_NOT_SUPPORTED) {
532 fputs("[]", f);
533 HTTPServer_log_err("Warning: encoding %s not supported\n", jscoverage_encoding);
534 }
535 else if (result == JSCOVERAGE_ERROR_INVALID_BYTE_SEQUENCE) {
536 fputs("[]", f);
537 HTTPServer_log_err("Warning: error decoding %s in file %s\n", jscoverage_encoding, file_coverage->id);
538 }
539 else {
540 write_source(file_coverage->id, characters, num_characters, f);
541 free(characters);
542 }
543 }
544 }
545 else {
546 /* path does not begin with / */
547 fputs("[]", f);
548 HTTPServer_log_err("Warning: invalid source path: %s\n", file_coverage->id);
549 }
550 }
551 }
552 else {
553 fputc('[', f);
554 for (uint32_t i = 0; i < file_coverage->num_source_lines; i++) {
555 if (i > 0) {
556 fputc(',', f);
557 }
558 char * source_line = file_coverage->source_lines[i];
559 write_js_quoted_string(f, source_line, strlen(source_line));
560 }
561 fputc(']', f);
562 }
563 fputc('}', f);
564 }
565
566 static int write_json(Coverage * coverage, const char * path) __attribute__((warn_unused_result));
567
568 static int write_json(Coverage * coverage, const char * path) {
569 /* write the JSON */
570 FILE * f = fopen(path, "wb");
571 if (f == NULL) {
572 return -1;
573 }
574 putc('{', f);
575 Coverage_foreach_file(coverage, write_json_for_file, f);
576 putc('}', f);
577 if (fclose(f) == EOF) {
578 return -1;
579 }
580 return 0;
581 }
582
583 static void handle_jscoverage_request(HTTPExchange * exchange) {
584 /* set the `Server' response-header (RFC 2616 14.38, 3.8) */
585 HTTPExchange_set_response_header(exchange, HTTP_SERVER, "jscoverage-server/" VERSION);
586
587 const char * abs_path = HTTPExchange_get_abs_path(exchange);
588 assert(*abs_path != '\0');
589 if (str_starts_with(abs_path, "/jscoverage-store")) {
590 if (strcmp(HTTPExchange_get_method(exchange), "POST") != 0) {
591 HTTPExchange_set_response_header(exchange, HTTP_ALLOW, "POST");
592 send_response(exchange, 405, "Method not allowed\n");
593 return;
594 }
595
596 Stream * json = Stream_new(0);
597
598 /* read the POST body */
599 if (HTTPExchange_read_entire_request_entity_body(exchange, json) != 0) {
600 Stream_delete(json);
601 send_response(exchange, 400, "Could not read request body\n");
602 return;
603 }
604
605 Coverage * coverage = Coverage_new();
606 LOCK(&javascript_mutex);
607 int result = jscoverage_parse_json(coverage, json->data, json->length);
608 UNLOCK(&javascript_mutex);
609 Stream_delete(json);
610
611 if (result != 0) {
612 Coverage_delete(coverage);
613 send_response(exchange, 400, "Could not parse coverage data\n");
614 return;
615 }
616
617 mkdir_if_necessary(report_directory);
618 char * current_report_directory;
619 if (str_starts_with(abs_path, "/jscoverage-store/") && abs_path[18] != '\0') {
620 char * dir = decode_uri_component(abs_path + 18);
621 current_report_directory = make_path(report_directory, dir);
622 free(dir);
623 }
624 else {
625 current_report_directory = xstrdup(report_directory);
626 }
627 mkdir_if_necessary(current_report_directory);
628 char * path = make_path(current_report_directory, "jscoverage.json");
629
630 /* check if the JSON file exists */
631 struct stat buf;
632 if (stat(path, &buf) == 0) {
633 /* it exists: merge */
634 FILE * f = fopen(path, "rb");
635 if (f == NULL) {
636 result = 1;
637 }
638 else {
639 result = merge(coverage, f);
640 if (fclose(f) == EOF) {
641 result = 1;
642 }
643 }
644 if (result != 0) {
645 free(current_report_directory);
646 free(path);
647 Coverage_delete(coverage);
648 send_response(exchange, 500, "Could not merge with existing coverage data\n");
649 return;
650 }
651 }
652
653 result = write_json(coverage, path);
654 free(path);
655 Coverage_delete(coverage);
656 if (result != 0) {
657 free(current_report_directory);
658 send_response(exchange, 500, "Could not write coverage data\n");
659 return;
660 }
661
662 /* copy other files */
663 jscoverage_copy_resources(current_report_directory);
664 path = make_path(current_report_directory, "jscoverage.js");
665 free(current_report_directory);
666 FILE * f = fopen(path, "ab");
667 free(path);
668 if (f == NULL) {
669 send_response(exchange, 500, "Could not write to file: jscoverage.js\n");
670 return;
671 }
672 fputs("jscoverage_isReport = true;\r\n", f);
673 if (fclose(f) == EOF) {
674 send_response(exchange, 500, "Could not write to file: jscoverage.js\n");
675 return;
676 }
677
678 send_response(exchange, 200, "Coverage data stored\n");
679 }
680 else if (str_starts_with(abs_path, "/jscoverage-shutdown")) {
681 if (strcmp(HTTPExchange_get_method(exchange), "POST") != 0) {
682 HTTPExchange_set_response_header(exchange, HTTP_ALLOW, "POST");
683 send_response(exchange, 405, "Method not allowed\n");
684 return;
685 }
686
687 /* allow only from localhost */
688 struct sockaddr_in client;
689 if (HTTPExchange_get_peer(exchange, &client) != 0) {
690 send_response(exchange, 500, "Cannot get client address\n");
691 return;
692 }
693 if (client.sin_addr.s_addr != htonl(INADDR_LOOPBACK)) {
694 send_response(exchange, 403, "This operation can be performed only by localhost\n");
695 return;
696 }
697
698 send_response(exchange, 200, "The server will now shut down\n");
699 HTTPServer_shutdown();
700 }
701 else {
702 const char * path = abs_path + 1;
703 const struct Resource * resource = get_resource(path);
704 if (resource == NULL) {
705 send_response(exchange, 404, "Not found\n");
706 return;
707 }
708 HTTPExchange_set_response_header(exchange, HTTP_CONTENT_TYPE, get_content_type(path));
709 if (HTTPExchange_write_response(exchange, resource->data, resource->length) != 0) {
710 HTTPServer_log_err("Warning: error writing to client\n");
711 return;
712 }
713 if (strcmp(abs_path, "/jscoverage.js") == 0) {
714 const char * s = "jscoverage_isServer = true;\r\n";
715 if (HTTPExchange_write_response(exchange, s, strlen(s)) != 0) {
716 HTTPServer_log_err("Warning: error writing to client\n");
717 }
718 }
719 }
720 }
721
722 static void instrument_js(const char * id, const uint16_t * characters, size_t num_characters, Stream * output_stream) {
723 const struct Resource * resource = get_resource("report.js");
724 Stream_write(output_stream, resource->data, resource->length);
725
726 LOCK(&javascript_mutex);
727 jscoverage_instrument_js(id, characters, num_characters, output_stream);
728 UNLOCK(&javascript_mutex);
729 }
730
731 static bool is_hop_by_hop_header(const char * h) {
732 /* hop-by-hop headers (RFC 2616 13.5.1) */
733 return strcasecmp(h, HTTP_CONNECTION) == 0 ||
734 strcasecmp(h, "Keep-Alive") == 0 ||
735 strcasecmp(h, HTTP_PROXY_AUTHENTICATE) == 0 ||
736 strcasecmp(h, HTTP_PROXY_AUTHORIZATION) == 0 ||
737 strcasecmp(h, HTTP_TE) == 0 ||
738 strcasecmp(h, HTTP_TRAILER) == 0 ||
739 strcasecmp(h, HTTP_TRANSFER_ENCODING) == 0 ||
740 strcasecmp(h, HTTP_UPGRADE) == 0;
741 }
742
743 static void add_via_header(HTTPMessage * message, const char * version) {
744 char * value;
745 xasprintf(&value, "%s jscoverage-server", version);
746 HTTPMessage_add_header(message, HTTP_VIA, value);
747 free(value);
748 }
749
750 static int copy_http_message_body(HTTPMessage * from, HTTPMessage * to) __attribute__((warn_unused_result));
751
752 static int copy_http_message_body(HTTPMessage * from, HTTPMessage * to) {
753 uint8_t * buffer[8192];
754 for (;;) {
755 size_t bytes_read;
756 int result = HTTPMessage_read_message_body(from, buffer, 8192, &bytes_read);
757 if (result != 0) {
758 return result;
759 }
760 if (bytes_read == 0) {
761 return 0;
762 }
763 result = HTTPMessage_write(to, buffer, bytes_read);
764 if (result != 0) {
765 return result;
766 }
767 }
768 }
769
770 static void handle_proxy_request(HTTPExchange * client_exchange) {
771 HTTPConnection * server_connection = NULL;
772 HTTPExchange * server_exchange = NULL;
773
774 const char * abs_path = HTTPExchange_get_abs_path(client_exchange);
775 if (str_starts_with(abs_path, "/jscoverage")) {
776 handle_jscoverage_request(client_exchange);
777 return;
778 }
779
780 const char * host = HTTPExchange_get_host(client_exchange);
781 uint16_t port = HTTPExchange_get_port(client_exchange);
782
783 /* create a new connection */
784 server_connection = HTTPConnection_new_client(host, port);
785 if (server_connection == NULL) {
786 send_response(client_exchange, 504, "Could not connect to server\n");
787 goto done;
788 }
789
790 /* create a new exchange */
791 server_exchange = HTTPExchange_new(server_connection);
792 HTTPExchange_set_method(server_exchange, HTTPExchange_get_method(client_exchange));
793 HTTPExchange_set_request_uri(server_exchange, HTTPExchange_get_request_uri(client_exchange));
794 for (const HTTPHeader * h = HTTPExchange_get_request_headers(client_exchange); h != NULL; h = h->next) {
795 if (strcasecmp(h->name, HTTP_TRAILER) == 0 || strcasecmp(h->name, HTTP_TRANSFER_ENCODING) == 0) {
796 /* do nothing: we want to keep this header */
797 }
798 else if (is_hop_by_hop_header(h->name) ||
799 strcasecmp(h->name, HTTP_ACCEPT_ENCODING) == 0 ||
800 strcasecmp(h->name, HTTP_RANGE) == 0) {
801 continue;
802 }
803 HTTPExchange_add_request_header(server_exchange, h->name, h->value);
804 }
805 add_via_header(HTTPExchange_get_request_message(server_exchange), HTTPExchange_get_request_http_version(client_exchange));
806
807 /* send the request */
808 if (HTTPExchange_write_request_headers(server_exchange) != 0) {
809 send_response(client_exchange, 502, "Could not write to server\n");
810 goto done;
811 }
812
813 /* handle POST or PUT */
814 if (HTTPExchange_request_has_body(client_exchange)) {
815 HTTPMessage * client_request = HTTPExchange_get_request_message(client_exchange);
816 HTTPMessage * server_request = HTTPExchange_get_request_message(server_exchange);
817 if (copy_http_message_body(client_request, server_request) != 0) {
818 send_response(client_exchange, 400, "Error copying request body from client to server\n");
819 goto done;
820 }
821 }
822
823 if (HTTPExchange_flush_request(server_exchange) != 0) {
824 send_response(client_exchange, 502, "Could not write to server\n");
825 goto done;
826 }
827
828 /* receive the response */
829 if (HTTPExchange_read_response_headers(server_exchange) != 0) {
830 send_response(client_exchange, 502, "Could not read headers from server\n");
831 goto done;
832 }
833
834 HTTPExchange_set_status_code(client_exchange, HTTPExchange_get_status_code(server_exchange));
835
836 if (HTTPExchange_response_has_body(server_exchange) && should_instrument_request(server_exchange)) {
837 /* needs instrumentation */
838 Stream * input_stream = Stream_new(0);
839 if (HTTPExchange_read_entire_response_entity_body(server_exchange, input_stream) != 0) {
840 Stream_delete(input_stream);
841 send_response(client_exchange, 502, "Could not read body from server\n");
842 goto done;
843 }
844
845 const char * request_uri = HTTPExchange_get_request_uri(client_exchange);
846 char * encoding = HTTPMessage_get_charset(HTTPExchange_get_response_message(server_exchange));
847 if (encoding == NULL) {
848 encoding = xstrdup(jscoverage_encoding);
849 }
850 uint16_t * characters;
851 size_t num_characters;
852 int result = jscoverage_bytes_to_characters(encoding, input_stream->data, input_stream->length, &characters, &num_characters);
853 free(encoding);
854 Stream_delete(input_stream);
855 if (result == JSCOVERAGE_ERROR_ENCODING_NOT_SUPPORTED) {
856 send_response(client_exchange, 500, "Encoding not supported\n");
857 goto done;
858 }
859 else if (result == JSCOVERAGE_ERROR_INVALID_BYTE_SEQUENCE) {
860 send_response(client_exchange, 502, "Error decoding response\n");
861 goto done;
862 }
863
864 Stream * output_stream = Stream_new(0);
865 instrument_js(request_uri, characters, num_characters, output_stream);
866
867 /* send the headers to the client */
868 for (const HTTPHeader * h = HTTPExchange_get_response_headers(server_exchange); h != NULL; h = h->next) {
869 if (is_hop_by_hop_header(h->name) || strcasecmp(h->name, HTTP_CONTENT_LENGTH) == 0) {
870 continue;
871 }
872 else if (strcasecmp(h->name, HTTP_CONTENT_TYPE) == 0) {
873 HTTPExchange_add_response_header(client_exchange, HTTP_CONTENT_TYPE, "text/javascript; charset=ISO-8859-1");
874 continue;
875 }
876 HTTPExchange_add_response_header(client_exchange, h->name, h->value);
877 }
878 add_via_header(HTTPExchange_get_response_message(client_exchange), HTTPExchange_get_response_http_version(server_exchange));
879 HTTPExchange_set_response_content_length(client_exchange, output_stream->length);
880
881 /* send the instrumented code to the client */
882 if (HTTPExchange_write_response(client_exchange, output_stream->data, output_stream->length) != 0) {
883 HTTPServer_log_err("Warning: error writing to client\n");
884 }
885
886 /* characters go on the cache */
887 /*
888 free(characters);
889 */
890 Stream_delete(output_stream);
891 add_cached_source(request_uri, characters, num_characters);
892 }
893 else {
894 /* does not need instrumentation */
895
896 /* send the headers to the client */
897 for (const HTTPHeader * h = HTTPExchange_get_response_headers(server_exchange); h != NULL; h = h->next) {
898 if (strcasecmp(h->name, HTTP_TRAILER) == 0 || strcasecmp(h->name, HTTP_TRANSFER_ENCODING) == 0) {
899 /* do nothing: we want to keep this header */
900 }
901 else if (is_hop_by_hop_header(h->name)) {
902 continue;
903 }
904 HTTPExchange_add_response_header(client_exchange, h->name, h->value);
905 }
906 add_via_header(HTTPExchange_get_response_message(client_exchange), HTTPExchange_get_response_http_version(server_exchange));
907
908 if (HTTPExchange_write_response_headers(client_exchange) != 0) {
909 HTTPServer_log_err("Warning: error writing to client\n");
910 goto done;
911 }
912
913 if (HTTPExchange_response_has_body(server_exchange)) {
914 /* read the body from the server and send it to the client */
915 HTTPMessage * client_response = HTTPExchange_get_response_message(client_exchange);
916 HTTPMessage * server_response = HTTPExchange_get_response_message(server_exchange);
917 if (copy_http_message_body(server_response, client_response) != 0) {
918 HTTPServer_log_err("Warning: error copying response body from server to client\n");
919 goto done;
920 }
921 }
922 }
923
924 done:
925 if (server_exchange != NULL) {
926 HTTPExchange_delete(server_exchange);
927 }
928 if (server_connection != NULL) {
929 if (HTTPConnection_delete(server_connection) != 0) {
930 HTTPServer_log_err("Warning: error closing connection to server\n");
931 }
932 }
933 }
934
935 static void handle_local_request(HTTPExchange * exchange) {
936 /* add the `Server' response-header (RFC 2616 14.38, 3.8) */
937 HTTPExchange_add_response_header(exchange, HTTP_SERVER, "jscoverage-server/" VERSION);
938
939 char * decoded_path = NULL;
940 char * filesystem_path = NULL;
941
942 const char * abs_path = HTTPExchange_get_abs_path(exchange);
943 assert(*abs_path != '\0');
944
945 decoded_path = decode_uri_component(abs_path);
946
947 if (str_starts_with(decoded_path, "/jscoverage")) {
948 handle_jscoverage_request(exchange);
949 goto done;
950 }
951
952 if (strstr(decoded_path, "..") != NULL) {
953 send_response(exchange, 403, "Forbidden\n");
954 goto done;
955 }
956
957 filesystem_path = make_path(document_root, decoded_path + 1);
958 size_t filesystem_path_length = strlen(filesystem_path);
959 if (filesystem_path_length > 0 && filesystem_path[filesystem_path_length - 1] == '/') {
960 /* stat on Windows doesn't work with trailing slash */
961 filesystem_path[filesystem_path_length - 1] = '\0';
962 }
963
964 struct stat buf;
965 if (stat(filesystem_path, &buf) == -1) {
966 send_response(exchange, 404, "Not found\n");
967 goto done;
968 }
969
970 if (S_ISDIR(buf.st_mode)) {
971 if (abs_path[strlen(abs_path) - 1] != '/') {
972 const char * request_uri = HTTPExchange_get_request_uri(exchange);
973 char * uri = xmalloc(strlen(request_uri) + 2);
974 strcpy(uri, request_uri);
975 strcat(uri, "/");
976 HTTPExchange_add_response_header(exchange, "Location", uri);
977 free(uri);
978 send_response(exchange, 301, "Moved permanently\n");
979 goto done;
980 }
981
982 DIR * d = opendir(filesystem_path);
983 if (d == NULL) {
984 send_response(exchange, 404, "Not found\n");
985 goto done;
986 }
987
988 struct dirent * entry;
989 while ((entry = readdir(d)) != NULL) {
990 char * href = encode_uri_component(entry->d_name);
991 char * html_href = encode_html(href);
992 char * link = encode_html(entry->d_name);
993 char * directory_entry;
994 xasprintf(&directory_entry, "<a href=\"%s\">%s</a><br>\n", html_href, link);
995 if (HTTPExchange_write_response(exchange, directory_entry, strlen(directory_entry)) != 0) {
996 HTTPServer_log_err("Warning: error writing to client\n");
997 }
998 free(directory_entry);
999 free(href);
1000 free(html_href);
1001 free(link);
1002 }
1003 closedir(d);
1004 }
1005 else if (S_ISREG(buf.st_mode)) {
1006 FILE * f = fopen(filesystem_path, "rb");
1007 if (f == NULL) {
1008 send_response(exchange, 404, "Not found\n");
1009 goto done;
1010 }
1011
1012 /*
1013 When do we send a charset with Content-Type?
1014 if Content-Type is "text" or "application"
1015 if instrumented JavaScript
1016 use Content-Type: application/javascript; charset=ISO-8859-1
1017 else if --encoding is given
1018 use that encoding
1019 else
1020 send no charset
1021 else
1022 send no charset
1023 */
1024 const char * content_type = get_content_type(filesystem_path);
1025 if (strcmp(content_type, "text/javascript") == 0 && ! is_no_instrument(abs_path)) {
1026 HTTPExchange_set_response_header(exchange, HTTP_CONTENT_TYPE, "text/javascript; charset=ISO-8859-1");
1027
1028 Stream * input_stream = Stream_new(0);
1029 Stream_write_file_contents(input_stream, f);
1030
1031 uint16_t * characters;
1032 size_t num_characters;
1033 int result = jscoverage_bytes_to_characters(jscoverage_encoding, input_stream->data, input_stream->length, &characters, &num_characters);
1034 Stream_delete(input_stream);
1035
1036 if (result == JSCOVERAGE_ERROR_ENCODING_NOT_SUPPORTED) {
1037 send_response(exchange, 500, "Encoding not supported\n");
1038 goto done;
1039 }
1040 else if (result == JSCOVERAGE_ERROR_INVALID_BYTE_SEQUENCE) {
1041 send_response(exchange, 500, "Error decoding JavaScript file\n");
1042 goto done;
1043 }
1044
1045 Stream * output_stream = Stream_new(0);
1046 instrument_js(abs_path, characters, num_characters, output_stream);
1047 free(characters);
1048
1049 if (HTTPExchange_write_response(exchange, output_stream->data, output_stream->length) != 0) {
1050 HTTPServer_log_err("Warning: error writing to client\n");
1051 }
1052 Stream_delete(output_stream);
1053 }
1054 else {
1055 /* send the Content-Type with charset if necessary */
1056 if (specified_encoding != NULL && (str_starts_with(content_type, "text/") || str_starts_with(content_type, "application/"))) {
1057 char * content_type_with_charset = NULL;
1058 xasprintf(&content_type_with_charset, "%s; charset=%s", content_type, specified_encoding);
1059 HTTPExchange_set_response_header(exchange, HTTP_CONTENT_TYPE, content_type_with_charset);
1060 free(content_type_with_charset);
1061 }
1062 else {
1063 HTTPExchange_set_response_header(exchange, HTTP_CONTENT_TYPE, content_type);
1064 }
1065
1066 char buffer[8192];
1067 size_t bytes_read;
1068 while ((bytes_read = fread(buffer, 1, 8192, f)) > 0) {
1069 if (HTTPExchange_write_response(exchange, buffer, bytes_read) != 0) {
1070 HTTPServer_log_err("Warning: error writing to client\n");
1071 }
1072 }
1073 }
1074 fclose(f);
1075 }
1076 else {
1077 send_response(exchange, 404, "Not found\n");
1078 goto done;
1079 }
1080
1081 done:
1082 free(filesystem_path);
1083 free(decoded_path);
1084 }
1085
1086 static void handler(HTTPExchange * exchange) {
1087 if (verbose) {
1088 HTTPServer_log_out("%s", HTTPExchange_get_request_line(exchange));
1089 }
1090
1091 if (proxy) {
1092 handle_proxy_request(exchange);
1093 }
1094 else {
1095 handle_local_request(exchange);
1096 }
1097 }
1098
1099 int main(int argc, char ** argv) {
1100 program = "jscoverage-server";
1101
1102 const char * ip_address = "127.0.0.1";
1103 const char * port = "8080";
1104 int shutdown = 0;
1105
1106 no_instrument = xnew(const char *, argc - 1);
1107
1108 for (int i = 1; i < argc; i++) {
1109 if (strcmp(argv[i], "-h") == 0 || strcmp(argv[i], "--help") == 0) {
1110 copy_resource_to_stream("jscoverage-server-help.txt", stdout);
1111 exit(EXIT_SUCCESS);
1112 }
1113 else if (strcmp(argv[i], "-V") == 0 || strcmp(argv[i], "--version") == 0) {
1114 version();
1115 }
1116 else if (strcmp(argv[i], "-v") == 0 || strcmp(argv[i], "--verbose") == 0) {
1117 verbose = 1;
1118 }
1119
1120 else if (strcmp(argv[i], "--report-dir") == 0) {
1121 i++;
1122 if (i == argc) {
1123 fatal_command_line("--report-dir: option requires an argument");
1124 }
1125 report_directory = argv[i];
1126 }
1127 else if (strncmp(argv[i], "--report-dir=", 13) == 0) {
1128 report_directory = argv[i] + 13;
1129 }
1130
1131 else if (strcmp(argv[i], "--document-root") == 0) {
1132 i++;
1133 if (i == argc) {
1134 fatal_command_line("--document-root: option requires an argument");
1135 }
1136 document_root = argv[i];
1137 }
1138 else if (strncmp(argv[i], "--document-root=", 16) == 0) {
1139 document_root = argv[i] + 16;
1140 }
1141
1142 else if (strcmp(argv[i], "--encoding") == 0) {
1143 i++;
1144 if (i == argc) {
1145 fatal_command_line("--encoding: option requires an argument");
1146 }
1147 jscoverage_encoding = argv[i];
1148 specified_encoding = jscoverage_encoding;
1149 }
1150 else if (strncmp(argv[i], "--encoding=", 11) == 0) {
1151 jscoverage_encoding = argv[i] + 11;
1152 specified_encoding = jscoverage_encoding;
1153 }
1154
1155 else if (strcmp(argv[i], "--ip-address") == 0) {
1156 i++;
1157 if (i == argc) {
1158 fatal_command_line("--ip-address: option requires an argument");
1159 }
1160 ip_address = argv[i];
1161 }
1162 else if (strncmp(argv[i], "--ip-address=", 13) == 0) {
1163 ip_address = argv[i] + 13;
1164 }
1165
1166 else if (strcmp(argv[i], "--no-highlight") == 0) {
1167 jscoverage_highlight = false;
1168 }
1169
1170 else if (strcmp(argv[i], "--no-instrument") == 0) {
1171 i++;
1172 if (i == argc) {
1173 fatal_command_line("--no-instrument: option requires an argument");
1174 }
1175 no_instrument[num_no_instrument] = argv[i];
1176 num_no_instrument++;
1177 }
1178 else if (strncmp(argv[i], "--no-instrument=", 16) == 0) {
1179 no_instrument[num_no_instrument] = argv[i] + 16;
1180 num_no_instrument++;
1181 }
1182
1183 else if (strcmp(argv[i], "--port") == 0) {
1184 i++;
1185 if (i == argc) {
1186 fatal_command_line("--port: option requires an argument");
1187 }
1188 port = argv[i];
1189 }
1190 else if (strncmp(argv[i], "--port=", 7) == 0) {
1191 port = argv[i] + 7;
1192 }
1193
1194 else if (strcmp(argv[i], "--proxy") == 0) {
1195 proxy = 1;
1196 }
1197
1198 else if (strcmp(argv[i], "--shutdown") == 0) {
1199 shutdown = 1;
1200 }
1201
1202 else if (strncmp(argv[i], "-", 1) == 0) {
1203 fatal_command_line("unrecognized option `%s'", argv[i]);
1204 }
1205 else {
1206 fatal_command_line("too many arguments");
1207 }
1208 }
1209
1210 /* check the port */
1211 char * end;
1212 unsigned long numeric_port = strtoul(port, &end, 10);
1213 if (*end != '\0') {
1214 fatal_command_line("--port: option must be an integer");
1215 }
1216 if (numeric_port > UINT16_MAX) {
1217 fatal_command_line("--port: option must be 16 bits");
1218 }
1219
1220 /* is this a shutdown? */
1221 if (shutdown) {
1222 #ifdef __MINGW32__
1223 WSADATA data;
1224 if (WSAStartup(MAKEWORD(1, 1), &data) != 0) {
1225 fatal("could not start Winsock");
1226 }
1227 #endif
1228
1229 /* INADDR_LOOPBACK */
1230 HTTPConnection * connection = HTTPConnection_new_client("127.0.0.1", numeric_port);
1231 if (connection == NULL) {
1232 fatal("could not connect to server");
1233 }
1234 HTTPExchange * exchange = HTTPExchange_new(connection);
1235 HTTPExchange_set_method(exchange, "POST");
1236 HTTPExchange_set_request_uri(exchange, "/jscoverage-shutdown");
1237 if (HTTPExchange_write_request_headers(exchange) != 0) {
1238 fatal("could not write request headers to server");
1239 }
1240 if (HTTPExchange_read_response_headers(exchange) != 0) {
1241 fatal("could not read response headers from server");
1242 }
1243 Stream * stream = Stream_new(0);
1244 if (HTTPExchange_read_entire_response_entity_body(exchange, stream) != 0) {
1245 fatal("could not read response body from server");
1246 }
1247 fwrite(stream->data, 1, stream->length, stdout);
1248 Stream_delete(stream);
1249 HTTPExchange_delete(exchange);
1250 if (HTTPConnection_delete(connection) != 0) {
1251 fatal("could not close connection with server");
1252 }
1253 exit(EXIT_SUCCESS);
1254 }
1255
1256 jscoverage_init();
1257
1258 #ifndef __MINGW32__
1259 /* handle broken pipe */
1260 signal(SIGPIPE, SIG_IGN);
1261 #endif
1262
1263 #ifdef __MINGW32__
1264 InitializeCriticalSection(&javascript_mutex);
1265 InitializeCriticalSection(&source_cache_mutex);
1266 #endif
1267
1268 if (verbose) {
1269 printf("Starting HTTP server on %s:%lu\n", ip_address, numeric_port);
1270 fflush(stdout);
1271 }
1272 HTTPServer_run(ip_address, (uint16_t) numeric_port, handler);
1273 if (verbose) {
1274 printf("Stopping HTTP server\n");
1275 fflush(stdout);
1276 }
1277
1278 jscoverage_cleanup();
1279
1280 free(no_instrument);
1281
1282 LOCK(&source_cache_mutex);
1283 while (source_cache != NULL) {
1284 SourceCache * p = source_cache;
1285 source_cache = source_cache->next;
1286 free(p->url);
1287 free(p->characters);
1288 free(p);
1289 }
1290 UNLOCK(&source_cache_mutex);
1291
1292 return 0;
1293 }

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