* Europagate, 1995
*
* $Log: urp.c,v $
- * Revision 1.1 1995/02/15 17:45:30 adam
+ * Revision 1.11 1995/02/22 15:22:33 adam
+ * Much more checking of run-time state. Show command never retrieves
+ * more records than indicated by the previous search request. Help
+ * command available. The maximum number of records retrieved can be
+ * controlled now.
+ *
+ * Revision 1.10 1995/02/22 08:51:35 adam
+ * Output function can be customized in fml, which is used to print
+ * the reply to reply_fd.
+ *
+ * Revision 1.9 1995/02/21 17:46:21 adam
+ * Minor changes.
+ *
+ * Revision 1.8 1995/02/21 12:12:00 adam
+ * Diagnostic record with error info. observed.
+ *
+ * Revision 1.7 1995/02/20 21:16:20 adam
+ * FML support. Bug fixes. Profile for drewdb.
+ *
+ * Revision 1.6 1995/02/17 14:41:14 quinn
+ * Added simple display of records.
+ *
+ * Revision 1.5 1995/02/17 14:22:13 adam
+ * First steps of CCL show command. Not finished yet.
+ *
+ * Revision 1.4 1995/02/17 09:08:36 adam
+ * Reply with subject. CCL base command implemented.
+ *
+ * Revision 1.3 1995/02/16 18:35:09 adam
+ * First use of Zdist library. Search requests are supported.
+ * Present requests are not supported yet.
+ *
+ * Revision 1.2 1995/02/16 13:21:00 adam
+ * Organization of resource files for targets and conversion
+ * language implemented.
+ *
+ * Revision 1.1 1995/02/15 17:45:30 adam
* First version of email gateway kernel. Email requests are read
* from stdin. The output is transferred to an MTA if 'From' is
* found in the header - or stdout if absent. No Z39.50 client is used.
#include <assert.h>
#include <ctype.h>
#include <string.h>
+#include <unistd.h>
#include "kernel.h"
#define LINE_MAX 256
+static void put_esc_str (const char *s)
+{
+ int escape_flag = 0;
+ while (*s)
+ {
+ if (*s == '\\' && s[1])
+ {
+ switch (*++s)
+ {
+ case 'n':
+ fputc ('\n', reply_fd);
+ break;
+ case 't':
+ fputc ('\t', reply_fd);
+ break;
+ default:
+ fputc (*s, reply_fd);
+ break;
+ }
+ escape_flag = 1;
+ }
+ else
+ {
+ if (*s != ' ' || !escape_flag)
+ fputc (*s, reply_fd);
+ escape_flag = 0;
+ }
+ s++;
+ }
+}
+
+static int reopen_target (void)
+{
+ const char *v;
+ if (info.zass)
+ gw_log (GW_LOG_WARN, "urp", "Zass free...");
+ info.zass = zass_open (info.hostname, info.port);
+ if (!info.zass)
+ {
+ fprintf (reply_fd, "%s %s:%d\n",
+ gw_res_get (info.kernel_res, "gw.err.connect",
+ "Cannot connect to target"),
+ info.hostname, info.port);
+ return -1;
+ }
+ v = gw_res_get (info.kernel_res, "gw.description", NULL);
+ if (v)
+ fprintf (reply_fd, "%s\n", v);
+ fprintf (reply_fd, "%s %s:%d\n",
+ gw_res_get (info.kernel_res, "gw.msg.connect",
+ "Connection established to"),
+ info.hostname, info.port);
+ if (*info.databases)
+ fprintf (reply_fd, "%s:\n%s\n",
+ gw_res_get (info.kernel_res, "gw.msg.databases",
+ "Available databases"),
+ info.databases);
+ return 0;
+}
+
static char line_buf[LINE_MAX+1];
static struct command_word {
{ "continue", "continue" },
{ "status", "status" },
{ "cancel", "cancel" },
+{ "target", "target" },
{ NULL, NULL }
};
sprintf (resource_name, "%s%s", resource_prefix,
tab->resource_suffix);
- v = gw_res_get (kernel_res, resource_name, tab->default_value);
+ v = gw_res_get (info.kernel_res, resource_name, tab->default_value);
assert (v);
strcpy (command_names, v);
cp = command_names;
return 0;
}
-static int email_header (FILE *inf, char *from_str)
+static struct error_no_struct {
+ int no;
+ char *resource_name;
+} error_ccl_tab[] = {
+{ CCL_ERR_OK, "ok"},
+{ CCL_ERR_TERM_EXPECTED, "term.expected" },
+{ CCL_ERR_RP_EXPECTED, "rp.expected" },
+{ CCL_ERR_SETNAME_EXPECTED, "setname.expected" },
+{ CCL_ERR_OP_EXPECTED, "op.expected" },
+{ CCL_ERR_BAD_RP, "bad.rp" },
+{ CCL_ERR_UNKNOWN_QUAL, "unknown.qual" },
+{ CCL_ERR_DOUBLE_QUAL, "double.qual" },
+{ CCL_ERR_EQ_EXPECTED, "eq.expected" },
+{ CCL_ERR_BAD_RELATION, "bad.relation" },
+{ CCL_ERR_TRUNC_NOT_LEFT, "trunc.not.left" },
+{ CCL_ERR_TRUNC_NOT_BOTH, "trunc.not.both" },
+{ CCL_ERR_TRUNC_NOT_RIGHT, "trunc.not.right" },
+{ 0, NULL }
+};
+
+static char *error_no_search (struct error_no_struct *tab, int no)
+{
+ struct error_no_struct *p = tab;
+ while (p->resource_name)
+ {
+ if (no == p->no)
+ return p->resource_name;
+ p++;
+ }
+ return NULL;
+}
+
+static int email_header (FILE *inf, char *from_str, char *subject_str)
{
*from_str = '\0';
+ *subject_str = '\0';
while (fgets (line_buf, LINE_MAX, inf))
{
if (line_buf[0] == '\n')
return 0;
if (strncmp (line_buf, "From ", 5) == 0)
sscanf (line_buf+4, "%s", from_str);
+ if (strncmp (line_buf, "Subject: ", 9) == 0 &&
+ sscanf (line_buf+9, "%s", subject_str+1) == 1)
+ strcpy (subject_str, line_buf+9);
}
return 1;
}
+static void help_general (void)
+{
+ put_esc_str (gw_res_get (info.kernel_res, "gw.help.general",
+ "Commands available in this service:\n"));
+}
+
+static int exec_help (struct ccl_token *list)
+{
+ help_general ();
+
+#if 0
+ put_esc_str (gw_res_get (info.kernel_res, "gw.help.target",
+ "target <name> - selects a given target\n"));
+
+ put_esc_str (gw_res_get (info.kernel_res, "gw.help.base",
+ "base <base>.. - selects databases\n"));
+
+ put_esc_str (gw_res_get (info.kernel_res, "gw.help.find",
+ "find <query> - performs a search request\n"));
+
+ put_esc_str (gw_res_get (info.kernel_res, "gw.help.show",
+ "show <spec> - retrieves and displays "
+ "records\n"));
+ put_esc_str (gw_res_get (info.kernel_res, "gw.help.help",
+ "help - displays help\n"));
+#endif
+ return 0;
+}
+
static int exec_find (struct ccl_token *list)
{
+ const struct zass_searchent *p;
+ struct gw_user_set *us;
+
struct ccl_rpn_node *rpn;
int error;
const char *pos;
- rpn = ccl_find (bibset, list, &error, &pos);
+ us = user_set_add ("Default", -1);
+ rpn = ccl_find (info.bibset, list, &error, &pos);
if (!rpn)
{
- fprintf (reply_fd, " %*s^ - ", pos - line_buf, " ");
- fprintf (reply_fd, "%s\n", ccl_err_msg (error));
+ const char *v = NULL, *n;
+ char name[128];
+
+ fprintf (reply_fd, " %*s^ - ", pos - line_buf, " ");
+
+ n = error_no_search (error_ccl_tab, error);
+ if (n)
+ {
+ sprintf (name, "gw.err.%s", n);
+ v = gw_res_get (info.kernel_res, name, NULL);
+ }
+ if (!v)
+ v = ccl_err_msg (error);
+ fprintf (reply_fd, "%s\n", v);
return -1;
}
ccl_pr_tree (rpn, reply_fd);
fprintf (reply_fd, "\n");
+
+ if (!*info.databases)
+ {
+ fprintf (reply_fd, "%s\n",
+ gw_res_get (info.kernel_res, "gw.err.no.database",
+ "You must select database"));
+ return -3;
+ }
+ gw_log (GW_LOG_DEBUG, "urp", "Searching in database %s",
+ info.databases);
+ assert (info.zass);
+ p = zass_search (info.zass, rpn, "Default", info.databases);
+ if (!p)
+ return -1;
+ if (p->errcode != -1)
+ {
+ fprintf (reply_fd, "%s %d: %s\n",
+ gw_res_get (info.kernel_res, "gw.msg.z39errcode",
+ "Z39.50 error code"),
+ p->errcode, p->errstring);
+ return -2;
+ }
+ fprintf (reply_fd, "%d %s\n", p->num,
+ gw_res_get (info.kernel_res, "gw.msg.hits", "hit(s)"));
+ us->hits = p->num;
+ return 0;
+}
+
+static int exec_target (struct ccl_token *list)
+{
+ int len;
+ if (list->kind == CCL_TOK_EOL)
+ return -1;
+ len = list->len;
+ memcpy (info.target, list->name, len);
+ info.target [len] = '\0';
+
+ read_kernel_res ();
+ return reopen_target ();
+}
+
+static int exec_base (struct ccl_token *list)
+{
+ struct ccl_token *li = list;
+ int len = 0;
+
+ assert (info.zass);
+ if (list->kind == CCL_TOK_EOL)
+ return -1;
+ free (info.databases);
+ while (li->kind != CCL_TOK_EOL)
+ {
+ len += li->len + 1;
+ li = li->next;
+ if (li->kind == CCL_TOK_COMMA)
+ li = li->next;
+ }
+ info.databases = malloc (len);
+ assert (info.databases);
+ len = 0;
+ li = list;
+ while (li->kind != CCL_TOK_EOL)
+ {
+ memcpy (info.databases+len, li->name, li->len);
+ len += li->len;
+ info.databases[len++] = ',';
+ li = li->next;
+ if (li->kind == CCL_TOK_COMMA)
+ li = li->next;
+ }
+ info.databases[len-1] = '\0';
+ return 0;
+}
+
+struct command_word show_tab [] =
+{
+{ "f", "format"},
+{ "p", "position"},
+{ NULL, NULL }
+};
+
+static void present (const char *set, int number, int offset,
+ struct ccl_token *format_token)
+{
+ const struct zass_presentent *zp;
+ int len;
+ int max_number;
+ char format_str[40];
+
+ max_number = atoi (gw_res_get (info.kernel_res, "gw.max.show",
+ "200"));
+ if (number > max_number)
+ number = max_number;
+ gw_log (GW_LOG_DEBUG, "urp", "present in set %s", set);
+ gw_log (GW_LOG_DEBUG, "urp", "present of %d records from offset %d",
+ number, offset);
+ zp = zass_present(info.zass, (char *) set, offset, number);
+ if (zp)
+ {
+ int i;
+ zass_record *pp;
+
+ fprintf (reply_fd, gw_res_get (info.kernel_res,
+ "gw.msg.records",
+ "Got %d records"),
+ zp->num);
+ fprintf (reply_fd, "\n");
+ for (i = 0, pp = zp->records; pp; pp = pp->next, i++)
+ {
+ Iso2709Rec rec;
+#if USE_FML
+ const char *arg_ar[5];
+#endif
+ fprintf (reply_fd, "--- %d/%d ---\n",
+ i+offset, offset+zp->num-1);
+ if (!gw_res_get (info.kernel_res, "gw.ignore.which", NULL))
+ {
+ if (pp->which == ZASS_REC_DIAG)
+ {
+ fprintf (reply_fd, "Record error %d: %s\n",
+ pp->errcode, pp->errstring);
+ continue;
+ }
+ else if (pp->which != ZASS_REC_USMARC)
+ {
+ fprintf (reply_fd, "Unknown record kind %d\n",
+ pp->which);
+ continue;
+ }
+ }
+ rec = iso2709_cvt (pp->record);
+ if (rec)
+ {
+#if USE_FML
+ if (format_token)
+ {
+ len = format_token->len;
+ memcpy (format_str, format_token->name, len);
+ format_str[len] = '\0';
+ }
+ if (info.fml && format_token &&
+ (!strcmp (format_str, "0") || !strcmp (format_str, "1")))
+ {
+ arg_ar[0] = "\\f";
+ arg_ar[1] = format_str;
+ arg_ar[2] = " \\list";
+ arg_ar[3] = marc_to_str (info.fml, rec);
+ arg_ar[4] = NULL;
+ fml_exec_call_argv (info.fml, arg_ar);
+ }
+ else
+ iso2709_display (rec, reply_fd);
+#else
+ iso2709_display (rec, reply_fd);
+#endif
+ iso2709_rm (rec);
+ }
+ else
+ fprintf (reply_fd, "Not a MARC record\n");
+ }
+ }
+}
+
+static int exec_show (struct ccl_token *list)
+{
+ char tmp_str[20];
+ struct ccl_token *set_token = NULL;
+ struct ccl_token *format_token = NULL;
+ struct ccl_token *li = list;
+ int no_of_present = 0;
+
+ assert (info.zass);
+ while (li->kind != CCL_TOK_EOL)
+ {
+ int modifier_no = 0;
+ if (li->next->kind == CCL_TOK_EQ)
+ {
+ if (li->kind == CCL_TOK_SET) /* set = <name> ? */
+ {
+ li = li->next->next;
+ set_token = li;
+ }
+ else
+ {
+ modifier_no = command_search (show_tab, li, "ccl.token.");
+ if (!modifier_no)
+ {
+ fprintf (reply_fd, "Unknown modifier in show\n");
+ return -1;
+ }
+ li = li->next->next;
+ if (modifier_no == 1) /* f = <name> ? */
+ format_token = li;
+ else if (modifier_no == 2) /* p = <name> ? */
+ {
+ if (li->kind != CCL_TOK_EOL /* p = <name> - <name> ? */
+ && li->next->kind == CCL_TOK_MINUS
+ && li->next->next != CCL_TOK_EOL)
+ li = li->next->next;
+ }
+ }
+ if (!li->next)
+ {
+ fprintf (reply_fd, "%s\n", "Missing token after '='");
+ return -2;
+ }
+ li = li->next;
+ }
+ else
+ li = li->next;
+ }
+ if (set_token)
+ gw_log (GW_LOG_DEBUG, "urp", "Got set=%.*s", set_token->len,
+ set_token->name);
+ if (format_token)
+ gw_log (GW_LOG_DEBUG, "urp", "Got format=%.*s", format_token->len,
+ format_token->name);
+
+ li = list;
+ while (li->kind != CCL_TOK_EOL)
+ {
+ int modifier_no = 0;
+ int offset = 0;
+ int number = 0;
+ int len;
+ if (li->next->kind == CCL_TOK_EQ && li->kind != CCL_TOK_SET)
+ {
+ modifier_no = command_search (show_tab, li, "ccl.token.");
+ li = li->next->next;
+ if (modifier_no == 2) /* p = <name> ? */
+ {
+ if (li->kind != CCL_TOK_EOL /* p = <name> - <name> ? */
+ && li->next->kind == CCL_TOK_MINUS
+ && li->next->next != CCL_TOK_EOL)
+ {
+ len = li->len;
+ memcpy (tmp_str, li->name, len);
+ tmp_str [len] = '\0';
+ offset = atoi (tmp_str);
+ li = li->next->next;
+
+ len = li->len;
+ memcpy (tmp_str, li->name, len);
+ tmp_str [len] = '\0';
+ number = atoi (tmp_str) - offset + 1;
+ }
+ else
+ {
+ len = li->len;
+ memcpy (tmp_str, li->name, len);
+ tmp_str [len] = '\0';
+ offset = atoi (tmp_str);
+ number = 1;
+ }
+ }
+ li = li->next;
+ }
+ else
+ {
+ len = li->len;
+ memcpy (tmp_str, li->name, len);
+ tmp_str[len] = '\0';
+ number = atoi (tmp_str);
+ offset = 1;
+ li = li->next;
+ }
+ if (offset > 0 && number > 0)
+ {
+ struct gw_user_set *us;
+
+ if (set_token)
+ {
+ len = set_token->len;
+ memcpy (tmp_str, set_token->name, len);
+ tmp_str[len] = '\0';
+ us = user_set_search (tmp_str);
+ }
+ else
+ us = user_set_search (NULL);
+ if (us && us->hits != -1) /* proper result-set? */
+ {
+ if (offset <= us->hits)
+ {
+ if (offset+number-1 > us->hits)
+ number = us->hits - offset+1;
+ present (us->name, offset, number, format_token);
+ }
+ }
+ else if (!no_of_present) /* display error message once! */
+ {
+ fprintf (reply_fd, "%s\n",
+ gw_res_get (info.kernel_res, "gw.err.no.set",
+ "No result-set generated"));
+ }
+ no_of_present++;
+ }
+ }
+ if (!no_of_present) /* no records shown so far? */
+ {
+ struct gw_user_set *us;
+ int default_show;
+
+ us = user_set_search (NULL);
+ if (us && us->hits != -1) /* proper result-set? */
+ {
+ default_show = atoi (gw_res_get (info.kernel_res,
+ "gw.default.show", "20"));
+ if (us->hits > default_show)
+ present (us->name, 1, default_show, format_token);
+ else if (us->hits > 0)
+ present (us->name, 1, us->hits, format_token);
+ }
+ else /* display error message */
+ {
+ fprintf (reply_fd, "%s\n",
+ gw_res_get (info.kernel_res, "gw.err.no.set",
+ "No result-set generated"));
+ return -3;
+ }
+ }
return 0;
}
struct ccl_token *cmd = ccl_tokenize (str);
int no;
- ccl_token_and = gw_res_get (kernel_res, "ccl.token.and", "and");
- ccl_token_or = gw_res_get (kernel_res, "ccl.token.or", "or");
- ccl_token_not = gw_res_get (kernel_res, "ccl.token.not", "not");
- ccl_token_set = gw_res_get (kernel_res, "ccl.token.set", "set");
-
- fprintf (reply_fd, "> %s", str);
- if (cmd->kind == CCL_TOK_TERM &&
+ if (cmd->kind != CCL_TOK_EOL &&
(no = command_search (command_tab, cmd, "ccl.command.")))
{
+ if (!info.zass && no != 9 && no != 4)
+ reopen_target ();
+ fprintf (reply_fd, "\n> %s", str);
+ if (!info.zass && (no == 1 || no == 2 || no == 3))
+ {
+ fprintf (reply_fd, "%s\n",
+ gw_res_get (info.kernel_res, "gw.err.no.target",
+ "No connection established - "
+ "command ignored"));
+ return 0;
+ }
switch (no)
{
case 1:
return exec_find (cmd->next);
- break;
case 2:
- fprintf (reply_fd, " show found\n");
- break;
+ return exec_show (cmd->next);
+ case 3:
+ return exec_base (cmd->next);
+ case 4:
+ return exec_help (cmd->next);
+ case 9:
+ return exec_target (cmd->next);
default:
- fprintf (reply_fd, " unimplemented command\n");
+ fprintf (reply_fd, "%s\n",
+ gw_res_get (info.kernel_res, "gw.err.unimplemented",
+ "Not implemented yet"));
}
}
else
- fprintf (reply_fd, " ^ unknown command\n");
+ {
+ fprintf (reply_fd, "\n> %s", str);
+ fprintf (reply_fd, " ^ %s\n",
+ gw_res_get (info.kernel_res, "gw.err.unknown.command",
+ "unknown command. "
+ "Use help to see list of commands"));
+ }
return 0;
}
int urp (FILE *inf)
{
char from_str[128];
+ char subject_str[128];
int command_no = 0;
char *reply_fname = NULL;
- if (email_header (inf, from_str))
+ if (email_header (inf, from_str, subject_str))
{
gw_log (GW_LOG_WARN, "urp", "No message body");
return -1;
}
if (*from_str)
{
- reply_fname = tempnam (gw_res_get (kernel_res,
+ reply_fname = tempnam (gw_res_get (info.kernel_res,
"gw.reply.tmp.dir", NULL),
- gw_res_get (kernel_res,
+ gw_res_get (info.kernel_res,
"gw.reply.tmp.prefix", "gwr"));
reply_fd = fopen (reply_fname, "w");
reply_fname);
return -1;
}
+ fprintf (reply_fd, "Subject: ");
+ if (*subject_str)
+ fprintf (reply_fd, "Z39.50 Re: %s", subject_str);
+ else
+ fprintf (reply_fd, "%s\n", gw_res_get (info.kernel_res,
+ "gw.msg.subject",
+ "Your Query"));
+ fprintf (reply_fd, "\n");
}
- fprintf (reply_fd, "%s\n", gw_res_get (kernel_res, "gw.msg.greeting",
+ else
+ gw_log (GW_LOG_WARN, "urp", "No From in email header");
+ fprintf (reply_fd, "%s\n", gw_res_get (info.kernel_res, "gw.msg.greeting",
"Email->Z39.50 gateway"));
while (fgets (line_buf, LINE_MAX, inf))
{
if (line_buf[0] == '\n')
break;
+ ccl_token_and = gw_res_get (info.kernel_res, "ccl.token.and", "and");
+ ccl_token_or = gw_res_get (info.kernel_res, "ccl.token.or", "or");
+ ccl_token_not = gw_res_get (info.kernel_res, "ccl.token.not", "not");
+ ccl_token_set = gw_res_get (info.kernel_res, "ccl.token.set", "set");
if (isalpha (line_buf[0]))
exec_command (line_buf);
command_no++;
}
if (!command_no)
- fprintf (reply_fd, "%s\n", gw_res_get (kernel_res, "gw.err.nullbody",
+ {
+ fprintf (reply_fd, "%s\n", gw_res_get (info.kernel_res,
+ "gw.err.nullbody",
"No body"));
+ help_general ();
+ }
if (*from_str)
{
const char *mta;
fclose (reply_fd);
reply_fd = stdout;
- mta = gw_res_get (kernel_res, "gw.reply.mta", "/usr/lib/sendmail");
+ mta = gw_res_get (info.kernel_res, "gw.reply.mta",
+ "/usr/lib/sendmail");
sprintf (cmd, "%s %s < %s", mta, from_str, reply_fname);
mta_code = system (cmd);