17 |
18 | #include "task.h"
19 |
20 | #define ISspace(x) isspace((int)(x))
21 |
22 | #define SERVER_STRING "Server: Malthttpd\r\n"
23 |
24 | /**********************************************************************/
25 | /* A request has caused a call to accept() on the server port to
26 | * return. Process the request appropriately.
27 | * Parameters: the socket connected to the client */
28 | /**********************************************************************/
29 | void task_conn::accept_request()
30 | {
31 | char buf[1024];
32 | int numchars;
33 | char method[255];
34 | char url[255];
35 | char path[512];
36 | size_t i, j;
37 | struct stat st;
38 | int cgi = 0; /* becomes true if server decides this is a CGI program */
39 | char *query_string = NULL;
40 |
41 | numchars = get_line(m_sockfd, buf, sizeof(buf));
42 | i = 0; j = 0;
43 |
44 | while (!ISspace(buf[j]) && (i < sizeof(method) - 1))
45 | {
46 | method[i] = buf[j];
47 | i++; j++;
48 | }
49 | method[i] = '\0';
50 |
51 | log(LOG_DEBUG_L, __FILE__, __LINE__, "task_conn:method is %s", buf);
52 | if (strcasecmp(method, "GET") && strcasecmp(method, "POST"))
53 | {
54 | log(LOG_DEBUG_L, __FILE__, __LINE__, "!GET & !POST");
55 | unimplemented(m_sockfd);
56 | return;
57 | }
58 |
59 | if (strcasecmp(method, "POST") == 0) //POST then start cgi
60 | cgi = 1;
61 |
62 | /*read url*/
63 | i = 0;
64 | while (ISspace(buf[j]) && (j < sizeof(buf)))
65 | j++;
66 | while (!ISspace(buf[j]) && (i < sizeof(url) - 1) && (j < sizeof(buf)))
67 | {
68 | /*save url */
69 | url[i] = buf[j];
70 | i++; j++;
71 | }
72 | url[i] = '\0';
73 |
74 | /*deal with GET method*/
75 | if (strcasecmp(method, "GET") == 0)
76 | {
77 | query_string = url;
78 | while ((*query_string != '?') && (*query_string != '\0'))
79 | query_string++;
80 | /* GET: after '?'' is args */
81 | if (*query_string == '?')
82 | {
83 | /*start cgi */
84 | cgi = 1;
85 | *query_string = '\0';
86 | query_string++;
87 | }
88 | }
89 |
90 | /* find files in htdocs/ */
91 | sprintf(path, "htdocs%s", url);
92 | /*default is index.html */
93 | if (path[strlen(path) - 1] == '/')
94 | strcat(path, "index.html");
95 |
96 | if (stat(path, &st) == -1) {
97 | while ((numchars > 0) && strcmp("\n", buf)) /* read & discard headers */
98 | numchars = get_line(m_sockfd, buf, sizeof(buf));
99 | /*404 error*/
100 | not_found(m_sockfd);
101 | }
102 | else
103 | {
104 | /*is a dir, use index.html in the dir*/
105 | if ((st.st_mode & S_IFMT) == S_IFDIR)
106 | strcat(path, "/index.html");
107 | /* if st has exec priviledge, cgi = 1*/
108 | if ((st.st_mode & S_IXUSR) || (st.st_mode & S_IXGRP) || (st.st_mode & S_IXOTH))
109 | {
110 | printf("task_conn:task_conntask_conn\n");
111 | cgi = 1;
112 | }
113 | /*!cgi return index.html, else exec cgi */
114 | if (!cgi)
115 | {
116 | log(LOG_DEBUG_L, __FILE__, __LINE__, "current is !cgi,GET method");
117 | serve_file(m_sockfd, path);
118 | }
119 | else
120 | {
121 | log(LOG_DEBUG_L, __FILE__, __LINE__, "current is cgi,post method");
122 | execute_cgi(m_sockfd, path, method, query_string);
123 | }
124 | }
125 |
126 | /* HTTP is non-connect, one connection is end */
127 | removefd( m_epollfd, m_sockfd );
128 | }
129 |
130 | /**********************************************************************/
131 | /* Inform the client that a request it has made has a problem.
132 | * Parameters: client socket */
133 | /**********************************************************************/
134 | void task_conn::bad_request(int client)
135 | {
136 | char buf[1024];
137 |
138 | /*return 400*/
139 | sprintf(buf, "HTTP/1.0 400 BAD REQUEST\r\n");
140 | send(client, buf, sizeof(buf), 0);
141 | sprintf(buf, "Content-type: text/html\r\n");
142 | send(client, buf, sizeof(buf), 0);
143 | sprintf(buf, "\r\n");
144 | send(client, buf, sizeof(buf), 0);
145 | sprintf(buf, "Your browser sent a bad request, ");
146 | send(client, buf, sizeof(buf), 0);
147 | sprintf(buf, "such as a POST without a Content-Length.\r\n");
148 | send(client, buf, sizeof(buf), 0);
149 | }
150 |
151 | /**********************************************************************/
152 | /* Put the entire contents of a file out on a socket. This function
153 | * is named after the UNIX "cat" command, because it might have been
154 | * easier just to do something like pipe, fork, and exec("cat").
155 | * Parameters: the client socket descriptor
156 | * FILE pointer for the file to cat */
157 | /**********************************************************************/
158 | void task_conn::cat(int client, FILE *resource)
159 | {
160 | char buf[1024];
161 |
162 | /*read index.html, write to socket*/
163 | fgets(buf, sizeof(buf), resource);
164 | while (!feof(resource))
165 | {
166 | send(client, buf, strlen(buf), 0);
167 | fgets(buf, sizeof(buf), resource);
168 | }
169 | }
170 |
171 | /**********************************************************************/
172 | /* Inform the client that a CGI script could not be executed.
173 | * Parameter: the client socket descriptor. */
174 | /**********************************************************************/
175 | void task_conn::cannot_execute(int client)
176 | {
177 | char buf[1024];
178 |
179 | /* cannot execute cgi,return 500*/
180 | sprintf(buf, "HTTP/1.0 500 Internal Server Error\r\n");
181 | send(client, buf, strlen(buf), 0);
182 | sprintf(buf, "Content-type: text/html\r\n");
183 | send(client, buf, strlen(buf), 0);
184 | sprintf(buf, "\r\n");
185 | send(client, buf, strlen(buf), 0);
186 | sprintf(buf, "
Error prohibited CGI execution.\r\n");
187 | send(client, buf, strlen(buf), 0);
188 | }
189 |
190 | /**********************************************************************/
191 | /* Print out an error message with perror() (for system errors; based
192 | * on value of errno, which indicates system call errors) and exit the
193 | * program indicating an error. */
194 | /**********************************************************************/
195 | void task_conn::error_die(const char *sc)
196 | {
197 | /*deal with error */
198 | perror(sc);
199 | exit(1);
200 | }
201 |
202 | /**********************************************************************/
203 | /* Execute a CGI script. Will need to set environment variables as
204 | * appropriate.
205 | * Parameters: client socket descriptor
206 | * path to the CGI script */
207 | /**********************************************************************/
208 | void task_conn::execute_cgi(int client, const char *path, const char *method, const char *query_string)
209 | {
210 | char buf[1024];
211 | int cgi_output[2];
212 | int cgi_input[2];
213 | pid_t pid;
214 | int status;
215 | int i;
216 | char c;
217 | int numchars = 1;
218 | int content_length = -1;
219 |
220 | buf[0] = 'A'; buf[1] = '\0';
221 | if (strcasecmp(method, "GET") == 0)
222 | {
223 | while ((numchars > 0) && strcmp("\n", buf)) /* read & discard headers */
224 | numchars = get_line(client, buf, sizeof(buf));
225 | }
226 | else /* POST */
227 | {
228 | /* find content_length */
229 | numchars = get_line(client, buf, sizeof(buf));
230 | while ((numchars > 0) && strcmp("\n", buf))
231 | {
232 | buf[15] = '\0';
233 | if (strcasecmp(buf, "Content-Length:") == 0)
234 | content_length = atoi(&(buf[16]));
235 | numchars = get_line(client, buf, sizeof(buf));
236 | }
237 | /*not find content_length */
238 | if (content_length == -1) {
239 | bad_request(client);
240 | return;
241 | }
242 | }
243 |
244 | /* success, return 200 */
245 | sprintf(buf, "HTTP/1.0 200 OK\r\n");
246 | send(client, buf, strlen(buf), 0);
247 |
248 | if (pipe(cgi_output) < 0) {
249 | cannot_execute(client);
250 | return;
251 | }
252 | if (pipe(cgi_input) < 0) {
253 | cannot_execute(client);
254 | return;
255 | }
256 |
257 | if ((pid = fork()) < 0 ) {
258 | cannot_execute(client);
259 | return;
260 | }
261 |
262 | if (pid == 0) /* child: CGI script */
263 | {
264 | //execl(path, path, NULL);
265 |
266 | char meth_env[255];
267 | char query_env[255];
268 | char length_env[255];
269 |
270 | /* redirect STDOUT to cgi_output's write */
271 | dup2(cgi_output[1], 1);
272 | /* redirect STDIN to cgi_input's read */
273 | dup2(cgi_input[0], 0);
274 | /* close cgi_input's write and cgi_output's read */
275 | close(cgi_output[0]);
276 | close(cgi_input[1]);
277 | /* set request_method environment */
278 | sprintf(meth_env, "REQUEST_METHOD=%s", method);
279 | putenv(meth_env);
280 | if (strcasecmp(method, "GET") == 0) {
281 | /*set query_string environment*/
282 | sprintf(query_env, "QUERY_STRING=%s", query_string);
283 | putenv(query_env);
284 | }
285 | else { /* POST */
286 | /*set content_length environment*/
287 | sprintf(length_env, "CONTENT_LENGTH=%d", content_length);
288 | putenv(length_env);
289 | }
290 |
291 | /*exec cgi*/
292 | execl(path, path, NULL);
293 | exit(0);
294 | } else { /* parent */
295 | /* close cgi_input' read and cgi_output's write*/
296 | log(LOG_DEBUG_L, __FILE__, __LINE__, "task_conn:parent %d", client);
297 | close(cgi_output[1]);
298 | close(cgi_input[0]);
299 | if (strcasecmp(method, "POST") == 0)
300 | /*recv POST data*/
301 | for (i = 0; i < content_length; i++) {
302 | recv(client, &c, 1, 0);
303 | log(LOG_DEBUG_L, __FILE__, __LINE__, "contents is %c", c);
304 | /*write POST data in cgi_input */
305 | write(cgi_input[1], &c, 1);
306 | }
307 | /*read cgi_ouput, send to client */
308 | while (read(cgi_output[0], &c, 1) > 0)
309 | {
310 | send(client, &c, 1, 0);
311 | }
312 |
313 | /*close pipe*/
314 | close(cgi_output[0]);
315 | close(cgi_input[1]);
316 |
317 | /*waitpid by parent in processpool.h*/
318 | }
319 | }
320 |
321 | /**********************************************************************/
322 | /* Get a line from a socket, whether the line ends in a newline,
323 | * carriage return, or a CRLF combination. Terminates the string read
324 | * with a null character. If no newline indicator is found before the
325 | * end of the buffer, the string is terminated with a null. If any of
326 | * the above three line terminators is read, the last character of the
327 | * string will be a linefeed and the string will be terminated with a
328 | * null character.
329 | * Parameters: the socket descriptor
330 | * the buffer to save the data in
331 | * the size of the buffer
332 | * Returns: the number of bytes stored (excluding null) */
333 | /**********************************************************************/
334 | int task_conn::get_line(int sock, char *buf, int size)
335 | {
336 | int i = 0;
337 | char c = '\0';
338 | int n;
339 |
340 | while ((i < size - 1) && (c != '\n'))
341 | {
342 | n = recv(sock, &c, 1, 0);
343 | if (n > 0)
344 | {
345 | if (c == '\r')
346 | {
347 | n = recv(sock, &c, 1, MSG_PEEK);
348 | if ((n > 0) && (c == '\n'))
349 | recv(sock, &c, 1, 0);
350 | else
351 | c = '\n';
352 | }
353 | buf[i] = c;
354 | i++;
355 | }
356 | else
357 | c = '\n';
358 | }
359 | buf[i] = '\0';
360 |
361 | return(i);
362 | }
363 |
364 | /**********************************************************************/
365 | /* Return the informational HTTP headers about a file. */
366 | /* Parameters: the socket to print the headers on
367 | * the name of the file */
368 | /**********************************************************************/
369 | void task_conn::headers(int client, const char *filename)
370 | {
371 | char buf[1024];
372 | (void)filename; /* could use filename to determine file type */
373 |
374 | strcpy(buf, "HTTP/1.0 200 OK\r\n");
375 | send(client, buf, strlen(buf), 0);
376 |
377 | strcpy(buf, SERVER_STRING);
378 | send(client, buf, strlen(buf), 0);
379 | sprintf(buf, "Content-Type: text/html\r\n");
380 | send(client, buf, strlen(buf), 0);
381 | strcpy(buf, "\r\n");
382 | send(client, buf, strlen(buf), 0);
383 | printf("task_conn:11111111111111111111");
384 | }
385 |
386 | /**********************************************************************/
387 | /* Give a client a 404 not found status message. */
388 | /**********************************************************************/
389 | void task_conn::not_found(int client)
390 | {
391 | char buf[1024];
392 |
393 | /* 404 */
394 | sprintf(buf, "HTTP/1.0 404 NOT FOUND\r\n");
395 | send(client, buf, strlen(buf), 0);
396 |
397 | sprintf(buf, SERVER_STRING);
398 | send(client, buf, strlen(buf), 0);
399 | sprintf(buf, "Content-Type: text/html\r\n");
400 | send(client, buf, strlen(buf), 0);
401 | sprintf(buf, "\r\n");
402 | send(client, buf, strlen(buf), 0);
403 | sprintf(buf, "
Not Found\r\n");
404 | send(client, buf, strlen(buf), 0);
405 | sprintf(buf, "The server could not fulfill\r\n");
406 | send(client, buf, strlen(buf), 0);
407 | sprintf(buf, "your request because the resource specified\r\n");
408 | send(client, buf, strlen(buf), 0);
409 | sprintf(buf, "is unavailable or nonexistent.\r\n");
410 | send(client, buf, strlen(buf), 0);
411 | sprintf(buf, "\r\n");
412 | send(client, buf, strlen(buf), 0);
413 | }
414 |
415 | /**********************************************************************/
416 | /* Send a regular file to the client. Use headers, and report
417 | * errors to client if they occur.
418 | * Parameters: a pointer to a file structure produced from the socket
419 | * file descriptor
420 | * the name of the file to serve */
421 | /**********************************************************************/
422 | void task_conn::serve_file(int client, const char *filename)
423 | {
424 | FILE *resource = NULL;
425 | int numchars = 1;
426 | char buf[1024];
427 |
428 | buf[0] = 'A'; buf[1] = '\0';
429 | while ((numchars > 0) && strcmp("\n", buf)) /* read & discard headers */
430 | numchars = get_line(client, buf, sizeof(buf));
431 |
432 | /*open sever file*/
433 | resource = fopen(filename, "r");
434 | if (resource == NULL)
435 | not_found(client);
436 | else
437 | {
438 | /*HTTP header */
439 | headers(client, filename);
440 | /*copy file*/
441 | cat(client, resource);
442 | }
443 | fclose(resource);
444 | }
445 |
446 | /**********************************************************************/
447 | /* Inform the client that the requested web method has not been
448 | * implemented.
449 | * Parameter: the client socket */
450 | /**********************************************************************/
451 | void task_conn::unimplemented(int client)
452 | {
453 | char buf[1024];
454 |
455 |
456 | sprintf(buf, "HTTP/1.0 501 Method Not Implemented\r\n");
457 | send(client, buf, strlen(buf), 0);
458 |
459 | sprintf(buf, SERVER_STRING);
460 | send(client, buf, strlen(buf), 0);
461 | sprintf(buf, "Content-Type: text/html\r\n");
462 | send(client, buf, strlen(buf), 0);
463 | sprintf(buf, "\r\n");
464 | send(client, buf, strlen(buf), 0);
465 | sprintf(buf, "
Method Not Implemented\r\n");
466 | send(client, buf, strlen(buf), 0);
467 | sprintf(buf, "\r\n");
468 | send(client, buf, strlen(buf), 0);
469 | sprintf(buf, "HTTP request method not supported.\r\n");
470 | send(client, buf, strlen(buf), 0);
471 | sprintf(buf, "\r\n");
472 | send(client, buf, strlen(buf), 0);
473 | }
--------------------------------------------------------------------------------
/LICENSE:
--------------------------------------------------------------------------------
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202 | keep intact all notices of the absence of any warranty; and give all
203 | recipients a copy of this License along with the Program.
204 |
205 | You may charge any price or no price for each copy that you convey,
206 | and you may offer support or warranty protection for a fee.
207 |
208 | 5. Conveying Modified Source Versions.
209 |
210 | You may convey a work based on the Program, or the modifications to
211 | produce it from the Program, in the form of source code under the
212 | terms of section 4, provided that you also meet all of these conditions:
213 |
214 | a) The work must carry prominent notices stating that you modified
215 | it, and giving a relevant date.
216 |
217 | b) The work must carry prominent notices stating that it is
218 | released under this License and any conditions added under section
219 | 7. This requirement modifies the requirement in section 4 to
220 | "keep intact all notices".
221 |
222 | c) You must license the entire work, as a whole, under this
223 | License to anyone who comes into possession of a copy. This
224 | License will therefore apply, along with any applicable section 7
225 | additional terms, to the whole of the work, and all its parts,
226 | regardless of how they are packaged. This License gives no
227 | permission to license the work in any other way, but it does not
228 | invalidate such permission if you have separately received it.
229 |
230 | d) If the work has interactive user interfaces, each must display
231 | Appropriate Legal Notices; however, if the Program has interactive
232 | interfaces that do not display Appropriate Legal Notices, your
233 | work need not make them do so.
234 |
235 | A compilation of a covered work with other separate and independent
236 | works, which are not by their nature extensions of the covered work,
237 | and which are not combined with it such as to form a larger program,
238 | in or on a volume of a storage or distribution medium, is called an
239 | "aggregate" if the compilation and its resulting copyright are not
240 | used to limit the access or legal rights of the compilation's users
241 | beyond what the individual works permit. Inclusion of a covered work
242 | in an aggregate does not cause this License to apply to the other
243 | parts of the aggregate.
244 |
245 | 6. Conveying Non-Source Forms.
246 |
247 | You may convey a covered work in object code form under the terms
248 | of sections 4 and 5, provided that you also convey the
249 | machine-readable Corresponding Source under the terms of this License,
250 | in one of these ways:
251 |
252 | a) Convey the object code in, or embodied in, a physical product
253 | (including a physical distribution medium), accompanied by the
254 | Corresponding Source fixed on a durable physical medium
255 | customarily used for software interchange.
256 |
257 | b) Convey the object code in, or embodied in, a physical product
258 | (including a physical distribution medium), accompanied by a
259 | written offer, valid for at least three years and valid for as
260 | long as you offer spare parts or customer support for that product
261 | model, to give anyone who possesses the object code either (1) a
262 | copy of the Corresponding Source for all the software in the
263 | product that is covered by this License, on a durable physical
264 | medium customarily used for software interchange, for a price no
265 | more than your reasonable cost of physically performing this
266 | conveying of source, or (2) access to copy the
267 | Corresponding Source from a network server at no charge.
268 |
269 | c) Convey individual copies of the object code with a copy of the
270 | written offer to provide the Corresponding Source. This
271 | alternative is allowed only occasionally and noncommercially, and
272 | only if you received the object code with such an offer, in accord
273 | with subsection 6b.
274 |
275 | d) Convey the object code by offering access from a designated
276 | place (gratis or for a charge), and offer equivalent access to the
277 | Corresponding Source in the same way through the same place at no
278 | further charge. You need not require recipients to copy the
279 | Corresponding Source along with the object code. If the place to
280 | copy the object code is a network server, the Corresponding Source
281 | may be on a different server (operated by you or a third party)
282 | that supports equivalent copying facilities, provided you maintain
283 | clear directions next to the object code saying where to find the
284 | Corresponding Source. Regardless of what server hosts the
285 | Corresponding Source, you remain obligated to ensure that it is
286 | available for as long as needed to satisfy these requirements.
287 |
288 | e) Convey the object code using peer-to-peer transmission, provided
289 | you inform other peers where the object code and Corresponding
290 | Source of the work are being offered to the general public at no
291 | charge under subsection 6d.
292 |
293 | A separable portion of the object code, whose source code is excluded
294 | from the Corresponding Source as a System Library, need not be
295 | included in conveying the object code work.
296 |
297 | A "User Product" is either (1) a "consumer product", which means any
298 | tangible personal property which is normally used for personal, family,
299 | or household purposes, or (2) anything designed or sold for incorporation
300 | into a dwelling. In determining whether a product is a consumer product,
301 | doubtful cases shall be resolved in favor of coverage. For a particular
302 | product received by a particular user, "normally used" refers to a
303 | typical or common use of that class of product, regardless of the status
304 | of the particular user or of the way in which the particular user
305 | actually uses, or expects or is expected to use, the product. A product
306 | is a consumer product regardless of whether the product has substantial
307 | commercial, industrial or non-consumer uses, unless such uses represent
308 | the only significant mode of use of the product.
309 |
310 | "Installation Information" for a User Product means any methods,
311 | procedures, authorization keys, or other information required to install
312 | and execute modified versions of a covered work in that User Product from
313 | a modified version of its Corresponding Source. The information must
314 | suffice to ensure that the continued functioning of the modified object
315 | code is in no case prevented or interfered with solely because
316 | modification has been made.
317 |
318 | If you convey an object code work under this section in, or with, or
319 | specifically for use in, a User Product, and the conveying occurs as
320 | part of a transaction in which the right of possession and use of the
321 | User Product is transferred to the recipient in perpetuity or for a
322 | fixed term (regardless of how the transaction is characterized), the
323 | Corresponding Source conveyed under this section must be accompanied
324 | by the Installation Information. But this requirement does not apply
325 | if neither you nor any third party retains the ability to install
326 | modified object code on the User Product (for example, the work has
327 | been installed in ROM).
328 |
329 | The requirement to provide Installation Information does not include a
330 | requirement to continue to provide support service, warranty, or updates
331 | for a work that has been modified or installed by the recipient, or for
332 | the User Product in which it has been modified or installed. Access to a
333 | network may be denied when the modification itself materially and
334 | adversely affects the operation of the network or violates the rules and
335 | protocols for communication across the network.
336 |
337 | Corresponding Source conveyed, and Installation Information provided,
338 | in accord with this section must be in a format that is publicly
339 | documented (and with an implementation available to the public in
340 | source code form), and must require no special password or key for
341 | unpacking, reading or copying.
342 |
343 | 7. Additional Terms.
344 |
345 | "Additional permissions" are terms that supplement the terms of this
346 | License by making exceptions from one or more of its conditions.
347 | Additional permissions that are applicable to the entire Program shall
348 | be treated as though they were included in this License, to the extent
349 | that they are valid under applicable law. If additional permissions
350 | apply only to part of the Program, that part may be used separately
351 | under those permissions, but the entire Program remains governed by
352 | this License without regard to the additional permissions.
353 |
354 | When you convey a copy of a covered work, you may at your option
355 | remove any additional permissions from that copy, or from any part of
356 | it. (Additional permissions may be written to require their own
357 | removal in certain cases when you modify the work.) You may place
358 | additional permissions on material, added by you to a covered work,
359 | for which you have or can give appropriate copyright permission.
360 |
361 | Notwithstanding any other provision of this License, for material you
362 | add to a covered work, you may (if authorized by the copyright holders of
363 | that material) supplement the terms of this License with terms:
364 |
365 | a) Disclaiming warranty or limiting liability differently from the
366 | terms of sections 15 and 16 of this License; or
367 |
368 | b) Requiring preservation of specified reasonable legal notices or
369 | author attributions in that material or in the Appropriate Legal
370 | Notices displayed by works containing it; or
371 |
372 | c) Prohibiting misrepresentation of the origin of that material, or
373 | requiring that modified versions of such material be marked in
374 | reasonable ways as different from the original version; or
375 |
376 | d) Limiting the use for publicity purposes of names of licensors or
377 | authors of the material; or
378 |
379 | e) Declining to grant rights under trademark law for use of some
380 | trade names, trademarks, or service marks; or
381 |
382 | f) Requiring indemnification of licensors and authors of that
383 | material by anyone who conveys the material (or modified versions of
384 | it) with contractual assumptions of liability to the recipient, for
385 | any liability that these contractual assumptions directly impose on
386 | those licensors and authors.
387 |
388 | All other non-permissive additional terms are considered "further
389 | restrictions" within the meaning of section 10. If the Program as you
390 | received it, or any part of it, contains a notice stating that it is
391 | governed by this License along with a term that is a further
392 | restriction, you may remove that term. If a license document contains
393 | a further restriction but permits relicensing or conveying under this
394 | License, you may add to a covered work material governed by the terms
395 | of that license document, provided that the further restriction does
396 | not survive such relicensing or conveying.
397 |
398 | If you add terms to a covered work in accord with this section, you
399 | must place, in the relevant source files, a statement of the
400 | additional terms that apply to those files, or a notice indicating
401 | where to find the applicable terms.
402 |
403 | Additional terms, permissive or non-permissive, may be stated in the
404 | form of a separately written license, or stated as exceptions;
405 | the above requirements apply either way.
406 |
407 | 8. Termination.
408 |
409 | You may not propagate or modify a covered work except as expressly
410 | provided under this License. Any attempt otherwise to propagate or
411 | modify it is void, and will automatically terminate your rights under
412 | this License (including any patent licenses granted under the third
413 | paragraph of section 11).
414 |
415 | However, if you cease all violation of this License, then your
416 | license from a particular copyright holder is reinstated (a)
417 | provisionally, unless and until the copyright holder explicitly and
418 | finally terminates your license, and (b) permanently, if the copyright
419 | holder fails to notify you of the violation by some reasonable means
420 | prior to 60 days after the cessation.
421 |
422 | Moreover, your license from a particular copyright holder is
423 | reinstated permanently if the copyright holder notifies you of the
424 | violation by some reasonable means, this is the first time you have
425 | received notice of violation of this License (for any work) from that
426 | copyright holder, and you cure the violation prior to 30 days after
427 | your receipt of the notice.
428 |
429 | Termination of your rights under this section does not terminate the
430 | licenses of parties who have received copies or rights from you under
431 | this License. If your rights have been terminated and not permanently
432 | reinstated, you do not qualify to receive new licenses for the same
433 | material under section 10.
434 |
435 | 9. Acceptance Not Required for Having Copies.
436 |
437 | You are not required to accept this License in order to receive or
438 | run a copy of the Program. Ancillary propagation of a covered work
439 | occurring solely as a consequence of using peer-to-peer transmission
440 | to receive a copy likewise does not require acceptance. However,
441 | nothing other than this License grants you permission to propagate or
442 | modify any covered work. These actions infringe copyright if you do
443 | not accept this License. Therefore, by modifying or propagating a
444 | covered work, you indicate your acceptance of this License to do so.
445 |
446 | 10. Automatic Licensing of Downstream Recipients.
447 |
448 | Each time you convey a covered work, the recipient automatically
449 | receives a license from the original licensors, to run, modify and
450 | propagate that work, subject to this License. You are not responsible
451 | for enforcing compliance by third parties with this License.
452 |
453 | An "entity transaction" is a transaction transferring control of an
454 | organization, or substantially all assets of one, or subdividing an
455 | organization, or merging organizations. If propagation of a covered
456 | work results from an entity transaction, each party to that
457 | transaction who receives a copy of the work also receives whatever
458 | licenses to the work the party's predecessor in interest had or could
459 | give under the previous paragraph, plus a right to possession of the
460 | Corresponding Source of the work from the predecessor in interest, if
461 | the predecessor has it or can get it with reasonable efforts.
462 |
463 | You may not impose any further restrictions on the exercise of the
464 | rights granted or affirmed under this License. For example, you may
465 | not impose a license fee, royalty, or other charge for exercise of
466 | rights granted under this License, and you may not initiate litigation
467 | (including a cross-claim or counterclaim in a lawsuit) alleging that
468 | any patent claim is infringed by making, using, selling, offering for
469 | sale, or importing the Program or any portion of it.
470 |
471 | 11. Patents.
472 |
473 | A "contributor" is a copyright holder who authorizes use under this
474 | License of the Program or a work on which the Program is based. The
475 | work thus licensed is called the contributor's "contributor version".
476 |
477 | A contributor's "essential patent claims" are all patent claims
478 | owned or controlled by the contributor, whether already acquired or
479 | hereafter acquired, that would be infringed by some manner, permitted
480 | by this License, of making, using, or selling its contributor version,
481 | but do not include claims that would be infringed only as a
482 | consequence of further modification of the contributor version. For
483 | purposes of this definition, "control" includes the right to grant
484 | patent sublicenses in a manner consistent with the requirements of
485 | this License.
486 |
487 | Each contributor grants you a non-exclusive, worldwide, royalty-free
488 | patent license under the contributor's essential patent claims, to
489 | make, use, sell, offer for sale, import and otherwise run, modify and
490 | propagate the contents of its contributor version.
491 |
492 | In the following three paragraphs, a "patent license" is any express
493 | agreement or commitment, however denominated, not to enforce a patent
494 | (such as an express permission to practice a patent or covenant not to
495 | sue for patent infringement). To "grant" such a patent license to a
496 | party means to make such an agreement or commitment not to enforce a
497 | patent against the party.
498 |
499 | If you convey a covered work, knowingly relying on a patent license,
500 | and the Corresponding Source of the work is not available for anyone
501 | to copy, free of charge and under the terms of this License, through a
502 | publicly available network server or other readily accessible means,
503 | then you must either (1) cause the Corresponding Source to be so
504 | available, or (2) arrange to deprive yourself of the benefit of the
505 | patent license for this particular work, or (3) arrange, in a manner
506 | consistent with the requirements of this License, to extend the patent
507 | license to downstream recipients. "Knowingly relying" means you have
508 | actual knowledge that, but for the patent license, your conveying the
509 | covered work in a country, or your recipient's use of the covered work
510 | in a country, would infringe one or more identifiable patents in that
511 | country that you have reason to believe are valid.
512 |
513 | If, pursuant to or in connection with a single transaction or
514 | arrangement, you convey, or propagate by procuring conveyance of, a
515 | covered work, and grant a patent license to some of the parties
516 | receiving the covered work authorizing them to use, propagate, modify
517 | or convey a specific copy of the covered work, then the patent license
518 | you grant is automatically extended to all recipients of the covered
519 | work and works based on it.
520 |
521 | A patent license is "discriminatory" if it does not include within
522 | the scope of its coverage, prohibits the exercise of, or is
523 | conditioned on the non-exercise of one or more of the rights that are
524 | specifically granted under this License. You may not convey a covered
525 | work if you are a party to an arrangement with a third party that is
526 | in the business of distributing software, under which you make payment
527 | to the third party based on the extent of your activity of conveying
528 | the work, and under which the third party grants, to any of the
529 | parties who would receive the covered work from you, a discriminatory
530 | patent license (a) in connection with copies of the covered work
531 | conveyed by you (or copies made from those copies), or (b) primarily
532 | for and in connection with specific products or compilations that
533 | contain the covered work, unless you entered into that arrangement,
534 | or that patent license was granted, prior to 28 March 2007.
535 |
536 | Nothing in this License shall be construed as excluding or limiting
537 | any implied license or other defenses to infringement that may
538 | otherwise be available to you under applicable patent law.
539 |
540 | 12. No Surrender of Others' Freedom.
541 |
542 | If conditions are imposed on you (whether by court order, agreement or
543 | otherwise) that contradict the conditions of this License, they do not
544 | excuse you from the conditions of this License. If you cannot convey a
545 | covered work so as to satisfy simultaneously your obligations under this
546 | License and any other pertinent obligations, then as a consequence you may
547 | not convey it at all. For example, if you agree to terms that obligate you
548 | to collect a royalty for further conveying from those to whom you convey
549 | the Program, the only way you could satisfy both those terms and this
550 | License would be to refrain entirely from conveying the Program.
551 |
552 | 13. Use with the GNU Affero General Public License.
553 |
554 | Notwithstanding any other provision of this License, you have
555 | permission to link or combine any covered work with a work licensed
556 | under version 3 of the GNU Affero General Public License into a single
557 | combined work, and to convey the resulting work. The terms of this
558 | License will continue to apply to the part which is the covered work,
559 | but the special requirements of the GNU Affero General Public License,
560 | section 13, concerning interaction through a network will apply to the
561 | combination as such.
562 |
563 | 14. Revised Versions of this License.
564 |
565 | The Free Software Foundation may publish revised and/or new versions of
566 | the GNU General Public License from time to time. Such new versions will
567 | be similar in spirit to the present version, but may differ in detail to
568 | address new problems or concerns.
569 |
570 | Each version is given a distinguishing version number. If the
571 | Program specifies that a certain numbered version of the GNU General
572 | Public License "or any later version" applies to it, you have the
573 | option of following the terms and conditions either of that numbered
574 | version or of any later version published by the Free Software
575 | Foundation. If the Program does not specify a version number of the
576 | GNU General Public License, you may choose any version ever published
577 | by the Free Software Foundation.
578 |
579 | If the Program specifies that a proxy can decide which future
580 | versions of the GNU General Public License can be used, that proxy's
581 | public statement of acceptance of a version permanently authorizes you
582 | to choose that version for the Program.
583 |
584 | Later license versions may give you additional or different
585 | permissions. However, no additional obligations are imposed on any
586 | author or copyright holder as a result of your choosing to follow a
587 | later version.
588 |
589 | 15. Disclaimer of Warranty.
590 |
591 | THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
592 | APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
593 | HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
594 | OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
595 | THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
596 | PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
597 | IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
598 | ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
599 |
600 | 16. Limitation of Liability.
601 |
602 | IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
603 | WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
604 | THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
605 | GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
606 | USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
607 | DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
608 | PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
609 | EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
610 | SUCH DAMAGES.
611 |
612 | 17. Interpretation of Sections 15 and 16.
613 |
614 | If the disclaimer of warranty and limitation of liability provided
615 | above cannot be given local legal effect according to their terms,
616 | reviewing courts shall apply local law that most closely approximates
617 | an absolute waiver of all civil liability in connection with the
618 | Program, unless a warranty or assumption of liability accompanies a
619 | copy of the Program in return for a fee.
620 |
621 | END OF TERMS AND CONDITIONS
622 |
623 | How to Apply These Terms to Your New Programs
624 |
625 | If you develop a new program, and you want it to be of the greatest
626 | possible use to the public, the best way to achieve this is to make it
627 | free software which everyone can redistribute and change under these terms.
628 |
629 | To do so, attach the following notices to the program. It is safest
630 | to attach them to the start of each source file to most effectively
631 | state the exclusion of warranty; and each file should have at least
632 | the "copyright" line and a pointer to where the full notice is found.
633 |
634 | {one line to give the program's name and a brief idea of what it does.}
635 | Copyright (C) 2018 {name of author}
636 |
637 | This program is free software: you can redistribute it and/or modify
638 | it under the terms of the GNU General Public License as published by
639 | the Free Software Foundation, either version 3 of the License, or
640 | (at your option) any later version.
641 |
642 | This program is distributed in the hope that it will be useful,
643 | but WITHOUT ANY WARRANTY; without even the implied warranty of
644 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
645 | GNU General Public License for more details.
646 |
647 | You should have received a copy of the GNU General Public License
648 | along with this program. If not, see .
649 |
650 | Also add information on how to contact you by electronic and paper mail.
651 |
652 | If the program does terminal interaction, make it output a short
653 | notice like this when it starts in an interactive mode:
654 |
655 | tinyserver Copyright (C) 2018 Malt
656 | This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
657 | This is free software, and you are welcome to redistribute it
658 | under certain conditions; type `show c' for details.
659 |
660 | The hypothetical commands `show w' and `show c' should show the appropriate
661 | parts of the General Public License. Of course, your program's commands
662 | might be different; for a GUI interface, you would use an "about box".
663 |
664 | You should also get your employer (if you work as a programmer) or school,
665 | if any, to sign a "copyright disclaimer" for the program, if necessary.
666 | For more information on this, and how to apply and follow the GNU GPL, see
667 | .
668 |
669 | The GNU General Public License does not permit incorporating your program
670 | into proprietary programs. If your program is a subroutine library, you
671 | may consider it more useful to permit linking proprietary applications with
672 | the library. If this is what you want to do, use the GNU Lesser General
673 | Public License instead of this License. But first, please read
674 | .
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