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apropos_cgi.c
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apropos_cgi.c
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/*-
* Copyright (c) 2011 Abhinav Upadhyay <[email protected]>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <err.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "apropos-utils.h"
#include "cgi-utils.h"
typedef struct callback_data {
int count;
} callback_data;
static const char *HTMLTAB = " ";
/*
* print_form --
* Generates the beginning HTML body of the search form.
*/
static void
print_form(char *query)
{
printf("<html>\n");
printf("<head>\n");
printf("<title> NetBSD apropos </title>\n");
printf("<script type=\"text/javascript\" src=\"/jquery.js\"></script>\n");
printf("<script type=\"text/JavaScript\" src=\"/jquery.autocomplete.js\"></script>\n");
printf("<script type=\"text/javascript\" src=\"/ac.js\"></script>\n");
printf("<link href=\"/ac.css\" rel=\"stylesheet\" type=\"text/css\" />\n");
printf("</head>\n");
printf("<body>\n");
printf("<center>\n");
printf("<img src=\"http://netbsd.org/images/NetBSD.png\" height=\"200\" "
"width=\"200\" />");
printf("<table style=\"%s\">\n", "margin:10px;>\n");
printf("<form action=\"/cgi-bin/apropos.cgi\">\n");
printf("<tr >\n");
printf("<td> <input type=\"text\" name=\"q\" value=\"%s\" size=\"30\" id=\"query\"></td>\n",
query ? query : "" );
printf("<td> <input type=\"submit\" value=\"Search\"> </td>\n");
printf("</tr>\n");
printf("</table>");
}
static int
query_callback(void *data, const char *section, const char *name,
const char *name_desc, const char *snippet, size_t snippet_length)
{
printf("<div style=\"%s\">\n<tr>\n", "margin:20px; width: 60%");
printf("<td> <a href=\"/man/%s.html\">%s(%s) </a> %s%s</tr><tr><td>%s</tr> "
"<tr></tr></div>", name, name, section, HTMLTAB, name_desc,
snippet);
callback_data *cbdata = (callback_data *) data;
cbdata->count++;
return 0;
}
static void
search(sqlite3 *db, char *query, struct callback_data *cbdata, int page)
{
char *errmsg;
query_args args;
args.search_str = query;
args.sec_nums = NULL;
args.nrec = 10;
args.offset = (page - 1) * 10;
args.machine = NULL;
args.callback = &query_callback;
args.callback_data = cbdata;
args.errmsg = &errmsg;
printf("<table cellspacing=\"5px\" cellpadding=\"2px\" style=\"%s\">",
"align:left; margin:15px; width:65%; padding:10px;");
cbdata->count = 0;
run_query_html(db, &args);
printf("</table>");
printf("<div><h3>\n");
}
int
main(int argc, char *argv[])
{
int page;
int spell_correct = 0;
struct callback_data cbdata;
printf("Content-type:text/html;\n\n");
char *qstr = getenv("QUERY_STRING");
char *errmsg;
sqlite3 *db = init_db(MANDB_READONLY, MANCONF);
if (db == NULL) {
printf("Could not open database connection\n");
exit(EXIT_FAILURE);
}
char *query = get_param(qstr, "q");
lower(query);
query = remove_stopwords(query);
build_boolean_query(query);
char *p = get_param(qstr, "p");
if (p == NULL)
page = 1;
else
page = atoi(p);
print_form(query);
search(db, query, &cbdata, page);
char *correct_query;
char *term;
char *correct;
int spell_flag = 0;
if (spell_correct == 0 && cbdata.count == 0) {
correct_query = NULL;
spell_correct = 1;
for (term = strtok(query, " "); term; term = strtok(NULL, " ")) {
if ((correct = spell(db, term))) {
spell_flag = 1;
concat(&correct_query, correct);
}
else
concat(&correct_query, term);
}
if (spell_flag) {
printf("<h4>Did you mean %s ?</h2>\n", correct_query);
search(db, correct_query, &cbdata, page);
}
/* warnx("No relevant results obtained.\n"
"Please make sure that you spelled all the terms correctly "
"or try using better keywords.");*/
free(correct_query);
}
/* If 10 results were displayed then there might be more results,
* so display a link for Next page.
*/
if (cbdata.count == 10)
printf("<a href=\"/cgi-bin/apropos.cgi?q=%s&p=%d\"> Next </a>\n",
query, page + 1);
/* If we are on Page 2 or onwards, display a link for Previous page as well. */
if (page > 1) {
printf("%s\n", HTMLTAB);
printf("<a href=\"/cgi-bin/apropos.cgi?q=%s&p=%d\"> Previous </a>\n"
"</h3>\n",
query, page - 1);
}
printf("</h3></div>\n");
printf("</center>\n");
close_db(db);
free(query);
printf("</body>\n");
printf("</html>");
return 0;
}