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|
/*
* Copyright 2006 Richard Wilson <info@tinct.net>
* Copyright 2010 Chris Young <chris@unsatisfactorysoftware.co.uk>
* Copyright 2010 Michael Drake <tlsa@netsurf-browser.org>
*
* This file is part of NetSurf, http://www.netsurf-browser.org/
*
* NetSurf is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* NetSurf is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/** \file
* Content for directory listings (implementation).
*/
#include <sys/types.h>
#include <dirent.h>
#include <stdbool.h>
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/stat.h>
#include <time.h>
#include "content/content_protected.h"
#include "content/fetch.h"
#include "render/directory.h"
#include "render/html.h"
#include "utils/messages.h"
#include "utils/url.h"
#include "utils/utils.h"
#define MAX_LENGTH 2048
#define NO_NAME_COLUMN 1
#define NO_TYPE_COLUMN 1 << 1
#define NO_SIZE_COLUMN 1 << 2
#define NO_DATE_COLUMN 1 << 3
#define NO_TIME_COLUMN 1 << 4
static const char footer[] = "</div>\n</body>\n</html>\n";
static const char* dirlist_generate_top(void);
static bool dirlist_generate_hide_columns(int flags, char *buffer,
int buffer_length);
static bool dirlist_generate_title(char *title, char *buffer,
int buffer_length);
static bool dirlist_generate_parent_link(char *parent, char *buffer,
int buffer_length);
static bool dirlist_generate_headings(char *buffer, int buffer_length);
static bool dirlist_generate_row(bool even, bool directory, char *url,
char *name, char *type, long long size, char *date,
char *time, char *buffer, int buffer_length);
static const char* dirlist_generate_bottom(void);
static int dirlist_filesize_calculate(unsigned long *bytesize);
static int dirlist_filesize_value(unsigned long bytesize);
static char* dirlist_filesize_unit(unsigned long bytesize);
/**
* Generates the top part of an HTML directroy listing page
*
* \return Top of directory listing HTML
*
* This is part of a series of functions. To generate a complete page,
* call the following functions in order:
*
* dirlist_generate_top()
* dirlist_generate_hide_columns() -- optional
* dirlist_generate_title()
* dirlist_generate_parent_link() -- optional
* dirlist_generate_headings()
* dirlist_generate_row() -- call 'n' times for 'n' rows
* dirlist_generate_bottom()
*/
const char* dirlist_generate_top(void)
{
return "<html>\n"
"<head>\n"
"<style>\n"
"html, body { margin: 0; padding: 0; }\n"
"body { background-color: #abf; }\n"
"h1 { padding: 5mm; margin: 0; "
"border-bottom: 2px solid #bcf; }\n"
"p { padding: 2px 5mm; margin: 0; }\n"
"div { display: table; width: 94%; margin: 5mm auto 0 auto; "
"padding: 0; }\n"
"a, strong { display: table-row; margin: 0; padding: 0; }\n"
"a.odd { background-color: #bcf; }\n"
"a.even { background-color: #b2c3ff; }\n"
"span { display: table-cell; }\n"
"em > span { padding-bottom: 1px; }\n"
"a + a>span { border-top: 1px solid #9af; }\n"
"span.name { padding-left: 22px; min-height: 19px;}\n"
"a.dir > span.name { font-weight: bold; }\n"
"a.dir > span.type { font-weight: bold; }\n"
"span.size { text-align: right; padding-right: 0.3em; }\n"
"span.size + span.size { text-align: left; "
"padding-right: 0; }\n";
}
/**
* Generates the part of an HTML directory listing page that can suppress
* particular columns
*
* \param flags flags for which cols to suppress. 0 to suppress none
* \param buffer buffer to fill with generated HTML
* \param buffer_length maximum size of buffer
* \return true iff buffer filled without error
*
* This is part of a series of functions. To generate a complete page,
* call the following functions in order:
*
* dirlist_generate_top()
* dirlist_generate_hide_columns() -- optional
* dirlist_generate_title()
* dirlist_generate_parent_link() -- optional
* dirlist_generate_headings()
* dirlist_generate_row() -- call 'n' times for 'n' rows
* dirlist_generate_bottom()
*/
bool dirlist_generate_hide_columns(int flags, char *buffer, int buffer_length)
{
int error = snprintf(buffer, buffer_length,
"%s\n%s\n%s\n%s\n%s\n",
(flags & NO_NAME_COLUMN) ?
"span.name { display: none; }\n" : "",
(flags & NO_TYPE_COLUMN) ?
"span.type { display: none; }\n" : "",
(flags & NO_SIZE_COLUMN) ?
"span.size { display: none; }\n" : "",
(flags & NO_DATE_COLUMN) ?
"span.date { display: none; }\n" : "",
(flags & NO_TIME_COLUMN) ?
"span.time { display: none; }\n" : "");
if (error < 0 || error >= buffer_length)
/* Error or buffer too small */
return false;
else
/* OK */
return true;
}
/**
* Generates the part of an HTML directory listing page that contains the title
*
* \param title title to use
* \param buffer buffer to fill with generated HTML
* \param buffer_length maximum size of buffer
* \return true iff buffer filled without error
*
* This is part of a series of functions. To generate a complete page,
* call the following functions in order:
*
* dirlist_generate_top()
* dirlist_generate_hide_columns() -- optional
* dirlist_generate_title()
* dirlist_generate_parent_link() -- optional
* dirlist_generate_headings()
* dirlist_generate_row() -- call 'n' times for 'n' rows
* dirlist_generate_bottom()
*/
bool dirlist_generate_title(char *title, char *buffer, int buffer_length)
{
int error = snprintf(buffer, buffer_length,
"</style>\n"
"<title>%s</title>\n"
"</head>\n"
"<body>\n"
"<h1>%s</h1>\n",
title, title);
if (error < 0 || error >= buffer_length)
/* Error or buffer too small */
return false;
else
/* OK */
return true;
}
/**
* Generates the part of an HTML directory listing page that links to the parent
* directory
*
* \param parent url of parent directory
* \param buffer buffer to fill with generated HTML
* \param buffer_length maximum size of buffer
* \return true iff buffer filled without error
*
* This is part of a series of functions. To generate a complete page,
* call the following functions in order:
*
* dirlist_generate_top()
* dirlist_generate_hide_columns() -- optional
* dirlist_generate_title()
* dirlist_generate_parent_link() -- optional
* dirlist_generate_headings()
* dirlist_generate_row() -- call 'n' times for 'n' rows
* dirlist_generate_bottom()
*/
bool dirlist_generate_parent_link(char *parent, char *buffer, int buffer_length)
{
int error = snprintf(buffer, buffer_length,
"<p><a href=\"%s\">%s</a></p>",
parent, messages_get("FileParent"));
if (error < 0 || error >= buffer_length)
/* Error or buffer too small */
return false;
else
/* OK */
return true;
}
/**
* Generates the part of an HTML directory listing page that displays the column
* headings
*
* \param buffer buffer to fill with generated HTML
* \param buffer_length maximum size of buffer
* \return true iff buffer filled without error
*
* This is part of a series of functions. To generate a complete page,
* call the following functions in order:
*
* dirlist_generate_top()
* dirlist_generate_hide_columns() -- optional
* dirlist_generate_title()
* dirlist_generate_parent_link() -- optional
* dirlist_generate_headings()
* dirlist_generate_row() -- call 'n' times for 'n' rows
* dirlist_generate_bottom()
*/
bool dirlist_generate_headings(char *buffer, int buffer_length)
{
int error = snprintf(buffer, buffer_length,
"<div>\n<strong>"
"<span class=\"name\">%s</span> "
"<span class=\"type\">%s</span> "
"<span class=\"size\">%s</span>"
"<span class=\"size\"></span> "
"<span class=\"date\">%s</span> "
"<span class=\"time\">%s</span></strong>\n",
messages_get("FileName"), messages_get("FileType"),
messages_get("FileSize"), messages_get("FileDate"),
messages_get("FileTime"));
if (error < 0 || error >= buffer_length)
/* Error or buffer too small */
return false;
else
/* OK */
return true;
}
/**
* Generates the part of an HTML directory listing page that displays a row
* in the directory contents table
*
* \param even evenness of row number, for alternate row colouring
* \param directory whether this row is for a directory (or a file)
* \param url url for row entry
* \param name name of row entry
* \param type MIME type of row entry
* \param size size of row entry. If negative, size is left blank
* \param date date row entry was last modified
* \param time time row entry was last modified
* \param buffer buffer to fill with generated HTML
* \param buffer_length maximum size of buffer
* \return true iff buffer filled without error
*
* This is part of a series of functions. To generate a complete page,
* call the following functions in order:
*
* dirlist_generate_top()
* dirlist_generate_hide_columns() -- optional
* dirlist_generate_title()
* dirlist_generate_parent_link() -- optional
* dirlist_generate_headings()
* dirlist_generate_row() -- call 'n' times for 'n' rows
* dirlist_generate_bottom()
*/
bool dirlist_generate_row(bool even, bool directory, char *url, char *name,
char *type, long long size, char *date, char *time,
char *buffer, int buffer_length)
{
const char *unit;
char size_string[100];
int error;
if (size < 0) {
unit = "";
strncpy(size_string, "", sizeof size_string);
} else {
unit = messages_get(dirlist_filesize_unit((unsigned long)size));
snprintf(size_string, sizeof size_string, "%d",
dirlist_filesize_value((unsigned long)size));
}
error = snprintf(buffer, buffer_length,
"<a href=\"%s\" class=\"%s %s\">"
"<span class=\"name\">%s</span> "
"<span class=\"type\">%s</span> "
"<span class=\"size\">%s</span>"
"<span class=\"size\">%s</span> "
"<span class=\"date\">%s</span> "
"<span class=\"time\">%s</span></a>\n",
url, even ? "even" : "odd",
directory ? "dir" : "file",
name, type, size_string, unit, date, time);
if (error < 0 || error >= buffer_length)
/* Error or buffer too small */
return false;
else
/* OK */
return true;
}
/**
* Generates the bottom part of an HTML directroy listing page
*
* \return Bottom of directory listing HTML
*
* This is part of a series of functions. To generate a complete page,
* call the following functions in order:
*
* dirlist_generate_top()
* dirlist_generate_hide_columns() -- optional
* dirlist_generate_title()
* dirlist_generate_parent_link() -- optional
* dirlist_generate_headings()
* dirlist_generate_row() -- call 'n' times for 'n' rows
* dirlist_generate_bottom()
*/
const char* dirlist_generate_bottom(void)
{
return "</div>\n"
"</body>\n"
"</html>\n";
}
/**
* Obtain display value and units for filesize after conversion to B/kB/MB/GB,
* as appropriate.
*
* \param bytesize file size in bytes, updated to filesize in output units
* \return number of times bytesize has been divided by 1024
*/
int dirlist_filesize_calculate(unsigned long *bytesize)
{
int i = 0;
while (*bytesize > 1024 * 4) {
*bytesize /= 1024;
i++;
if (i == 3)
break;
}
return i;
}
/**
* Obtain display value for filesize after conversion to B/kB/MB/GB,
* as appropriate
*
* \param bytesize file size in bytes
* \return Value to display for file size, in units given by filesize_unit()
*/
int dirlist_filesize_value(unsigned long bytesize)
{
dirlist_filesize_calculate(&bytesize);
return (int)bytesize;
}
/**
* Obtain display units for filesize after conversion to B/kB/MB/GB,
* as appropriate
*
* \param bytesize file size in bytes
* \return Units to display for file size, for value given by filesize_value()
*/
char* dirlist_filesize_unit(unsigned long bytesize)
{
const char* units[] = { "Bytes", "kBytes", "MBytes", "GBytes" };
return (char*)units[dirlist_filesize_calculate(&bytesize)];
}
bool directory_create(struct content *c, const struct http_parameter *params) {
if (!html_create(c, params))
/* html_create() must have broadcast MSG_ERROR already, so we
* don't need to. */
return false;
binding_parse_chunk(c->data.html.parser_binding,
(uint8_t *) dirlist_generate_top(),
strlen(dirlist_generate_top()));
return true;
}
bool directory_convert(struct content *c) {
char *path;
DIR *parent;
struct dirent *entry;
union content_msg_data msg_data;
char buffer[MAX_LENGTH];
char *nice_path, *cnv, *tmp;
url_func_result res;
bool compare, directory;
char *up;
struct stat filestat;
char *filepath, *mimetype = NULL;
int filepath_size;
char *urlpath;
int urlpath_size;
char moddate[100];
char modtime[100];
long long filesize;
bool extendedinfo, evenrow = false;
char *title;
int title_length;
/* Get directory path from URL */
path = url_to_path(content__get_url(c));
if (!path) {
msg_data.error = messages_get("NoMemory");
content_broadcast(c, CONTENT_MSG_ERROR, msg_data);
return false;
}
/* Convert path for display */
nice_path = malloc(strlen(path) * 4 + 1);
if (!nice_path) {
msg_data.error = messages_get("MiscErr");
content_broadcast(c, CONTENT_MSG_ERROR, msg_data);
return false;
}
/* Escape special HTML characters */
for (cnv = nice_path, tmp = path; *tmp != '\0'; tmp++) {
if (*tmp == '<') {
*cnv++ = '&';
*cnv++ = 'l';
*cnv++ = 't';
*cnv++ = ';';
} else if (*tmp == '>') {
*cnv++ = '&';
*cnv++ = 'g';
*cnv++ = 't';
*cnv++ = ';';
} else {
*cnv++ = *tmp;
}
}
*cnv = '\0';
/* Set which columns to suppress */
dirlist_generate_hide_columns(0, buffer, MAX_LENGTH);
binding_parse_chunk(c->data.html.parser_binding,
(uint8_t *) buffer, strlen(buffer));
/* Construct a localised title string */
title_length = strlen(nice_path) + strlen(messages_get("FileIndex"));
title = malloc(title_length);
if(title == NULL) {
msg_data.error = messages_get("NoMemory");
content_broadcast(c, CONTENT_MSG_ERROR, msg_data);
return false;
}
/* Set title to localised "Index of <nice_path>" */
snprintf(title, title_length, messages_get("FileIndex"), nice_path);
/* Print document title and heading */
dirlist_generate_title(title, buffer, MAX_LENGTH);
free(nice_path);
free(title);
binding_parse_chunk(c->data.html.parser_binding,
(uint8_t *) buffer, strlen(buffer));
/* Print parent directory link */
res = url_parent(content__get_url(c), &up);
if (res == URL_FUNC_OK) {
res = url_compare(content__get_url(c), up, false, &compare);
if ((res == URL_FUNC_OK) && !compare) {
dirlist_generate_parent_link(up, buffer, MAX_LENGTH);
binding_parse_chunk(c->data.html.parser_binding,
(uint8_t *) buffer, strlen(buffer));
}
free(up);
}
/* Print directory contents table column headings */
dirlist_generate_headings(buffer, MAX_LENGTH);
binding_parse_chunk(c->data.html.parser_binding,
(uint8_t *) buffer, strlen(buffer));
if ((parent = opendir(path)) == NULL) {
msg_data.error = messages_get("EmptyErr");
content_broadcast(c, CONTENT_MSG_ERROR, msg_data);
return false;
}
/* Print a row for each item in the directory */
while ((entry = readdir(parent)) != NULL) {
if (!strcmp(entry->d_name, ".") ||
!strcmp(entry->d_name, ".."))
/* Skip . and .. entries */
continue;
filepath_size = strlen(path) + strlen(entry->d_name) + 2;
filepath = malloc(filepath_size);
if (filepath != NULL) {
strcpy(filepath, path);
if (path_add_part(filepath, filepath_size,
entry->d_name) == false) {
msg_data.error = messages_get("MiscErr");
content_broadcast(c, CONTENT_MSG_ERROR,
msg_data);
return false;
}
if (stat(filepath, &filestat) == 0)
extendedinfo = true;
else
extendedinfo = false;
} else {
msg_data.error = messages_get("MiscErr");
content_broadcast(c, CONTENT_MSG_ERROR, msg_data);
return false;
}
if (S_ISDIR(filestat.st_mode))
directory = true;
else
directory = false;
urlpath_size = strlen(content__get_url(c)) +
strlen(entry->d_name) + 2;
urlpath = malloc(urlpath_size);
if (urlpath != NULL) {
strcpy(urlpath, content__get_url(c));
if(urlpath[strlen(urlpath) - 1] != '/')
strncat(urlpath, "/", urlpath_size);
strncat(urlpath, entry->d_name, urlpath_size);
if (extendedinfo == true) {
/* Get date in output format */
if (strftime((char *)&moddate, sizeof moddate,
"%a %d %b %Y",
localtime(
&filestat.st_mtime)) == 0)
strncpy(moddate, "-", sizeof moddate);
/* Get time in output format */
if (strftime((char *)&modtime, sizeof modtime,
"%H:%M",
localtime(
&filestat.st_mtime)) == 0)
strncpy(modtime, "-", sizeof modtime);
if (directory) {
mimetype = strdup((char*)messages_get(
"FileDirectory"));
filesize = -1;
} else {
mimetype = fetch_mimetype(filepath);
filesize = (long long)
filestat.st_size;
}
} else {
strncpy(moddate, "", sizeof moddate);
strncpy(modtime, "", sizeof modtime);
filesize = -1;
}
/* Print row */
dirlist_generate_row(evenrow, directory,
urlpath, entry->d_name,
mimetype ? mimetype : (char*)"",
filesize,
moddate, modtime,
buffer, MAX_LENGTH);
binding_parse_chunk(c->data.html.parser_binding,
(uint8_t *) buffer, strlen(buffer));
free(urlpath);
}
if (evenrow == false)
evenrow = true;
else
evenrow = false;
if (mimetype != NULL) {
free(mimetype);
mimetype = NULL;
}
free(filepath);
}
closedir(parent);
binding_parse_chunk(c->data.html.parser_binding,
(uint8_t *) dirlist_generate_bottom(),
strlen(dirlist_generate_bottom()));
c->type = CONTENT_HTML;
return html_convert(c);
}
void directory_destroy(struct content *c)
{
/* This will only get called if the content is destroyed before
* content_convert() is called. Simply force the type to HTML and
* delegate the cleanup to html_destroy() */
c->type = CONTENT_HTML;
html_destroy(c);
return;
}
bool directory_clone(const struct content *old, struct content *new_content)
{
/* This will only get called if the content is cloned before
* content_convert() is called. Simply replay creation. */
if (directory_create(new_content, NULL) == false)
return false;
return true;
}
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