2 * "$Id: rss.c 11173 2013-07-23 12:31:34Z msweet $"
4 * RSS notifier for CUPS.
6 * Copyright 2007-2012 by Apple Inc.
7 * Copyright 2007 by Easy Software Products.
9 * These coded instructions, statements, and computer programs are the
10 * property of Apple Inc. and are protected by Federal copyright
11 * law. Distribution and use rights are outlined in the file "LICENSE.txt"
12 * which should have been included with this file. If this file is
13 * file is missing or damaged, see the license at "http://www.cups.org/".
17 * main() - Main entry for the test notifier.
18 * compare_rss() - Compare two messages.
19 * delete_message() - Free all memory used by a message.
20 * load_rss() - Load an existing RSS feed file.
21 * new_message() - Create a new RSS message.
22 * password_cb() - Return the cached password.
23 * save_rss() - Save messages to a RSS file.
24 * xml_escape() - Copy a string, escaping &, <, and > as needed.
28 * Include necessary headers...
31 #include <cups/cups.h>
32 #include <cups/language.h>
33 #include <cups/string-private.h>
34 #include <cups/array.h>
35 #include <sys/select.h>
36 #include <cups/ipp-private.h> /* TODO: Update so we don't need this */
43 typedef struct _cups_rss_s /**** RSS message data ****/
45 int sequence_number; /* notify-sequence-number */
46 char *subject, /* Message subject/summary */
47 *text, /* Message text */
48 *link_url; /* Link to printer */
49 time_t event_time; /* When the event occurred */
57 static char *rss_password; /* Password for remote RSS */
64 static int compare_rss(_cups_rss_t *a, _cups_rss_t *b);
65 static void delete_message(_cups_rss_t *rss);
66 static void load_rss(cups_array_t *rss, const char *filename);
67 static _cups_rss_t *new_message(int sequence_number, char *subject,
68 char *text, char *link_url,
70 static const char *password_cb(const char *prompt);
71 static int save_rss(cups_array_t *rss, const char *filename,
73 static char *xml_escape(const char *s);
77 * 'main()' - Main entry for the test notifier.
80 int /* O - Exit status */
81 main(int argc, /* I - Number of command-line arguments */
82 char *argv[]) /* I - Command-line arguments */
84 int i; /* Looping var */
85 ipp_t *event; /* Event from scheduler */
86 ipp_state_t state; /* IPP event state */
87 char scheme[32], /* URI scheme ("rss") */
88 username[256], /* Username for remote RSS */
89 host[1024], /* Hostname for remote RSS */
90 resource[1024], /* RSS file */
91 *options; /* Options */
92 int port, /* Port number for remote RSS */
93 max_events; /* Maximum number of events */
94 http_t *http; /* Connection to remote server */
95 http_status_t status; /* HTTP GET/PUT status code */
96 char filename[1024], /* Local filename */
97 newname[1024]; /* filename.N */
98 cups_lang_t *language; /* Language information */
99 ipp_attribute_t *printer_up_time, /* Timestamp on event */
100 *notify_sequence_number,/* Sequence number */
101 *notify_printer_uri; /* Printer URI */
102 char *subject, /* Subject for notification message */
103 *text, /* Text for notification message */
104 link_url[1024], /* Link to printer */
105 link_scheme[32], /* Scheme for link */
106 link_username[256], /* Username for link */
107 link_host[1024], /* Host for link */
108 link_resource[1024]; /* Resource for link */
109 int link_port; /* Link port */
110 cups_array_t *rss; /* RSS message array */
111 _cups_rss_t *msg; /* RSS message */
112 char baseurl[1024]; /* Base URL */
113 fd_set input; /* Input set for select() */
114 struct timeval timeout; /* Timeout for select() */
115 int changed; /* Has the RSS data changed? */
116 int exit_status; /* Exit status */
119 fprintf(stderr, "DEBUG: argc=%d\n", argc);
120 for (i = 0; i < argc; i ++)
121 fprintf(stderr, "DEBUG: argv[%d]=\"%s\"\n", i, argv[i]);
124 * See whether we are publishing this RSS feed locally or remotely...
127 if (httpSeparateURI(HTTP_URI_CODING_ALL, argv[1], scheme, sizeof(scheme),
128 username, sizeof(username), host, sizeof(host), &port,
129 resource, sizeof(resource)) < HTTP_URI_OK)
131 fprintf(stderr, "ERROR: Bad RSS URI \"%s\"!\n", argv[1]);
137 if ((options = strchr(resource, '?')) != NULL)
141 if (!strncmp(options, "max_events=", 11))
143 max_events = atoi(options + 11);
150 rss = cupsArrayNew((cups_array_func_t)compare_rss, NULL);
155 * Remote feed, see if we can get the current file...
158 int fd; /* Temporary file */
161 if ((rss_password = strchr(username, ':')) != NULL)
162 *rss_password++ = '\0';
164 cupsSetPasswordCB(password_cb);
165 cupsSetUser(username);
167 if ((fd = cupsTempFd(filename, sizeof(filename))) < 0)
169 fprintf(stderr, "ERROR: Unable to create temporary file: %s\n",
175 if ((http = httpConnect(host, port)) == NULL)
177 fprintf(stderr, "ERROR: Unable to connect to %s on port %d: %s\n",
178 host, port, strerror(errno));
186 status = cupsGetFd(http, resource, fd);
190 if (status != HTTP_OK && status != HTTP_NOT_FOUND)
192 fprintf(stderr, "ERROR: Unable to GET %s from %s on port %d: %d %s\n",
193 resource, host, port, status, httpStatus(status));
201 strlcpy(newname, filename, sizeof(newname));
203 httpAssembleURI(HTTP_URI_CODING_ALL, baseurl, sizeof(baseurl), "http",
204 NULL, host, port, resource);
208 const char *cachedir, /* CUPS_CACHEDIR */
209 *server_name, /* SERVER_NAME */
210 *server_port; /* SERVER_PORT */
215 if ((cachedir = getenv("CUPS_CACHEDIR")) == NULL)
216 cachedir = CUPS_CACHEDIR;
218 if ((server_name = getenv("SERVER_NAME")) == NULL)
219 server_name = "localhost";
221 if ((server_port = getenv("SERVER_PORT")) == NULL)
224 snprintf(filename, sizeof(filename), "%s/rss%s", cachedir, resource);
225 snprintf(newname, sizeof(newname), "%s.N", filename);
227 httpAssembleURIf(HTTP_URI_CODING_ALL, baseurl, sizeof(baseurl), "http",
228 NULL, server_name, atoi(server_port), "/rss%s", resource);
232 * Load the previous RSS file, if any...
235 load_rss(rss, filename);
237 changed = cupsArrayCount(rss) == 0;
240 * Localize for the user's chosen language...
243 language = cupsLangDefault();
246 * Read events and update the RSS file until we are out of events.
249 for (exit_status = 0, event = NULL;;)
254 * Save the messages to the file again, uploading as needed...
257 if (save_rss(rss, newname, baseurl))
262 * Upload the RSS file...
265 if ((status = cupsPutFile(http, resource, filename)) != HTTP_CREATED)
266 fprintf(stderr, "ERROR: Unable to PUT %s from %s on port %d: %d %s\n",
267 resource, host, port, status, httpStatus(status));
272 * Move the new RSS file over top the old one...
275 if (rename(newname, filename))
276 fprintf(stderr, "ERROR: Unable to rename %s to %s: %s\n",
277 newname, filename, strerror(errno));
285 * Wait up to 30 seconds for an event...
294 if (select(1, &input, NULL, NULL, &timeout) < 0)
296 else if (!FD_ISSET(0, &input))
298 fprintf(stderr, "DEBUG: %s is bored, exiting...\n", argv[1]);
303 * Read the next event...
307 while ((state = ippReadFile(0, event)) != IPP_DATA)
309 if (state <= IPP_IDLE)
313 if (state == IPP_ERROR)
314 fputs("DEBUG: ippReadFile() returned IPP_ERROR!\n", stderr);
316 if (state <= IPP_IDLE)
320 * Collect the info from the event...
323 printer_up_time = ippFindAttribute(event, "printer-up-time",
325 notify_sequence_number = ippFindAttribute(event, "notify-sequence-number",
327 notify_printer_uri = ippFindAttribute(event, "notify-printer-uri",
329 subject = cupsNotifySubject(language, event);
330 text = cupsNotifyText(language, event);
332 if (printer_up_time && notify_sequence_number && subject && text)
335 * Create a new RSS message...
338 if (notify_printer_uri)
340 httpSeparateURI(HTTP_URI_CODING_ALL,
341 notify_printer_uri->values[0].string.text,
342 link_scheme, sizeof(link_scheme),
343 link_username, sizeof(link_username),
344 link_host, sizeof(link_host), &link_port,
345 link_resource, sizeof(link_resource));
346 httpAssembleURI(HTTP_URI_CODING_ALL, link_url, sizeof(link_url),
347 "http", link_username, link_host, link_port,
351 msg = new_message(notify_sequence_number->values[0].integer,
352 xml_escape(subject), xml_escape(text),
353 notify_printer_uri ? xml_escape(link_url) : NULL,
354 printer_up_time->values[0].integer);
358 fprintf(stderr, "ERROR: Unable to create message: %s\n",
365 * Add it to the array...
368 cupsArrayAdd(rss, msg);
373 * Trim the array as needed...
376 while (cupsArrayCount(rss) > max_events)
378 msg = cupsArrayFirst(rss);
380 cupsArrayRemove(rss, msg);
397 * We only get here when idle or error...
408 return (exit_status);
413 * 'compare_rss()' - Compare two messages.
416 static int /* O - Result of comparison */
417 compare_rss(_cups_rss_t *a, /* I - First message */
418 _cups_rss_t *b) /* I - Second message */
420 return (a->sequence_number - b->sequence_number);
425 * 'delete_message()' - Free all memory used by a message.
429 delete_message(_cups_rss_t *msg) /* I - RSS message */
445 * 'load_rss()' - Load an existing RSS feed file.
449 load_rss(cups_array_t *rss, /* I - RSS messages */
450 const char *filename) /* I - File to load */
452 FILE *fp; /* File pointer */
453 char line[4096], /* Line from file */
454 *subject, /* Subject */
456 *link_url, /* Link URL */
457 *start, /* Start of element */
458 *end; /* End of element */
459 time_t event_time; /* Event time */
460 int sequence_number; /* Sequence number */
461 int in_item; /* In an item */
462 _cups_rss_t *msg; /* New message */
465 if ((fp = fopen(filename, "r")) == NULL)
468 fprintf(stderr, "ERROR: Unable to open %s: %s\n", filename,
481 while (fgets(line, sizeof(line), fp))
483 if (strstr(line, "<item>"))
485 else if (strstr(line, "</item>") && in_item)
489 msg = new_message(sequence_number, subject, text, link_url,
493 cupsArrayAdd(rss, msg);
517 else if ((start = strstr(line, "<title>")) != NULL)
520 if ((end = strstr(start, "</title>")) != NULL)
523 subject = strdup(start);
526 else if ((start = strstr(line, "<description>")) != NULL)
529 if ((end = strstr(start, "</description>")) != NULL)
532 text = strdup(start);
535 else if ((start = strstr(line, "<link>")) != NULL)
538 if ((end = strstr(start, "</link>")) != NULL)
541 link_url = strdup(start);
544 else if ((start = strstr(line, "<pubDate>")) != NULL)
547 if ((end = strstr(start, "</pubDate>")) != NULL)
550 event_time = httpGetDateTime(start);
553 else if ((start = strstr(line, "<guid>")) != NULL)
554 sequence_number = atoi(start + 6);
571 * 'new_message()' - Create a new RSS message.
574 static _cups_rss_t * /* O - New message */
575 new_message(int sequence_number, /* I - notify-sequence-number */
576 char *subject, /* I - Subject/summary */
577 char *text, /* I - Text */
578 char *link_url, /* I - Link to printer */
579 time_t event_time) /* I - Date/time of event */
581 _cups_rss_t *msg; /* New message */
584 if ((msg = calloc(1, sizeof(_cups_rss_t))) == NULL)
587 msg->sequence_number = sequence_number;
588 msg->subject = subject;
590 msg->link_url = link_url;
591 msg->event_time = event_time;
598 * 'password_cb()' - Return the cached password.
601 static const char * /* O - Cached password */
602 password_cb(const char *prompt) /* I - Prompt string, unused */
606 return (rss_password);
611 * 'save_rss()' - Save messages to a RSS file.
614 static int /* O - 1 on success, 0 on failure */
615 save_rss(cups_array_t *rss, /* I - RSS messages */
616 const char *filename, /* I - File to save to */
617 const char *baseurl) /* I - Base URL */
619 FILE *fp; /* File pointer */
620 _cups_rss_t *msg; /* Current message */
621 char date[1024]; /* Current date */
622 char *href; /* Escaped base URL */
625 if ((fp = fopen(filename, "w")) == NULL)
627 fprintf(stderr, "ERROR: Unable to create %s: %s\n", filename,
632 fputs("<?xml version=\"1.0\"?>\n", fp);
633 fputs("<rss version=\"2.0\">\n", fp);
634 fputs(" <channel>\n", fp);
635 fputs(" <title>CUPS RSS Feed</title>\n", fp);
637 href = xml_escape(baseurl);
638 fprintf(fp, " <link>%s</link>\n", href);
641 fputs(" <description>CUPS RSS Feed</description>\n", fp);
642 fputs(" <generator>" CUPS_SVERSION "</generator>\n", fp);
643 fputs(" <ttl>1</ttl>\n", fp);
645 fprintf(fp, " <pubDate>%s</pubDate>\n",
646 httpGetDateString2(time(NULL), date, sizeof(date)));
648 for (msg = (_cups_rss_t *)cupsArrayLast(rss);
650 msg = (_cups_rss_t *)cupsArrayPrev(rss))
652 fputs(" <item>\n", fp);
653 fprintf(fp, " <title>%s</title>\n", msg->subject);
654 fprintf(fp, " <description>%s</description>\n", msg->text);
656 fprintf(fp, " <link>%s</link>\n", msg->link_url);
657 fprintf(fp, " <pubDate>%s</pubDate>\n",
658 httpGetDateString2(msg->event_time, date, sizeof(date)));
659 fprintf(fp, " <guid>%d</guid>\n", msg->sequence_number);
660 fputs(" </item>\n", fp);
663 fputs(" </channel>\n", fp);
664 fputs("</rss>\n", fp);
666 return (!fclose(fp));
671 * 'xml_escape()' - Copy a string, escaping &, <, and > as needed.
674 static char * /* O - Escaped string */
675 xml_escape(const char *s) /* I - String to escape */
677 char *e, /* Escaped string */
678 *eptr; /* Pointer into escaped string */
679 const char *sptr; /* Pointer into string */
680 size_t bytes; /* Bytes needed for string */
684 * First figure out how many extra bytes we need...
687 for (bytes = 0, sptr = s; *sptr; sptr ++)
689 bytes += 4; /* & */
690 else if (*sptr == '<' || *sptr == '>')
691 bytes += 3; /* < and > */
694 * If there is nothing to escape, just strdup() it...
701 * Otherwise allocate memory and copy...
704 if ((e = malloc(bytes + 1 + strlen(s))) == NULL)
707 for (eptr = e, sptr = s; *sptr; sptr ++)
716 else if (*sptr == '<')
723 else if (*sptr == '>')
740 * End of "$Id: rss.c 11173 2013-07-23 12:31:34Z msweet $".