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gimp/plug-ins/uri/uri-backend-wget.c

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/* The GIMP -- an image manipulation program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* This program 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; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
/* Author: Josh MacDonald. */
#include "config.h"
#include <stdlib.h>
#include <stdio.h>
#include <sys/param.h>
#include <sys/wait.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <libgimp/gimp.h>
#include <libgimp/gimpui.h>
#include "libgimp/stdplugins-intl.h"
#define TIMEOUT "300"
#define BUFSIZE 1024
static void query (void);
static void run (const gchar *name,
gint nparams,
const GimpParam *param,
gint *nreturn_vals,
GimpParam **return_vals);
static gint32 load_image (const gchar *filename,
GimpRunMode run_mode,
GimpPDBStatusType *status /* return value */);
GimpPlugInInfo PLUG_IN_INFO =
{
NULL, /* init_proc */
NULL, /* quit_proc */
query, /* query_proc */
run, /* run_proc */
};
MAIN ()
static void
query (void)
{
static GimpParamDef load_args[] =
{
{ GIMP_PDB_INT32, "run_mode", "Interactive, non-interactive" },
{ GIMP_PDB_STRING, "filename", "The name of the file to load" },
{ GIMP_PDB_STRING, "raw_filename", "The name entered" }
};
static GimpParamDef load_return_vals[] =
{
{ GIMP_PDB_IMAGE, "image", "Output image" }
};
gimp_install_procedure ("file_url_load",
"loads files given a URL",
"You need to have GNU Wget installed.",
"Spencer Kimball & Peter Mattis",
"Spencer Kimball & Peter Mattis",
"1995-1997",
N_("URL"),
NULL,
GIMP_PLUGIN,
G_N_ELEMENTS (load_args),
G_N_ELEMENTS (load_return_vals),
load_args, load_return_vals);
gimp_plugin_menu_register ("file_url_load", "<Load>");
gimp_plugin_icon_register ("file_url_load",
GIMP_ICON_TYPE_STOCK_ID, GIMP_STOCK_WEB);
gimp_register_load_handler ("file_url_load",
"",
"http:,https:,ftp:");
}
static void
run (const gchar *name,
gint nparams,
const GimpParam *param,
gint *nreturn_vals,
GimpParam **return_vals)
{
static GimpParam values[2];
GimpRunMode run_mode;
GimpPDBStatusType status = GIMP_PDB_SUCCESS;
gint32 image_ID;
run_mode = param[0].data.d_int32;
*nreturn_vals = 1;
*return_vals = values;
values[0].type = GIMP_PDB_STATUS;
values[0].data.d_status = GIMP_PDB_EXECUTION_ERROR;
if (strcmp (name, "file_url_load") == 0)
{
image_ID = load_image (param[2].data.d_string,
run_mode,
&status);
if (image_ID != -1 &&
status == GIMP_PDB_SUCCESS)
{
*nreturn_vals = 2;
values[1].type = GIMP_PDB_IMAGE;
values[1].data.d_image = image_ID;
}
}
else
{
status = GIMP_PDB_CALLING_ERROR;
}
values[0].data.d_status = status;
}
static gint32
load_image (const gchar *filename,
GimpRunMode run_mode,
GimpPDBStatusType *status)
{
gint32 image_ID;
gchar *ext = strrchr (filename, '.');
gchar *tmpname;
gint pid;
gint wpid;
gint process_status;
gint p[2];
gboolean name_image = FALSE;
fprintf (stderr, "Loading URL: %s\n", filename);
if (!ext || ext[1] == 0 || strchr(ext, '/'))
tmpname = gimp_temp_name ("xxx");
else
{
tmpname = gimp_temp_name (ext + 1);
name_image = TRUE;
}
if (pipe (p) != 0)
{
g_message ("pipe() failed: %s", g_strerror (errno));
g_free (tmpname);
*status = GIMP_PDB_EXECUTION_ERROR;
return -1;
}
if ((pid = fork()) < 0)
{
g_message ("fork() failed: %s", g_strerror (errno));
g_free (tmpname);
*status = GIMP_PDB_EXECUTION_ERROR;
return -1;
}
else if (pid == 0)
{
close (p[0]);
close (2);
dup (p[1]);
close (p[1]);
#ifdef HAVE_PUTENV
/* produce deterministic output */
putenv ("LANGUAGE=C");
putenv ("LC_ALL=C");
putenv ("LANG=C");
#endif
execlp ("wget", "wget", "-T", TIMEOUT, filename, "-O", tmpname, NULL);
g_message ("exec() failed: wget: %s", g_strerror (errno));
g_free (tmpname);
_exit (127);
}
else
{
if (run_mode == GIMP_RUN_NONINTERACTIVE)
{
wpid = waitpid (pid, &process_status, 0);
if ((wpid < 0)
|| !WIFEXITED (process_status)
|| (WEXITSTATUS (process_status) != 0))
{
g_message ("wget exited abnormally on URL '%s'", filename);
g_free (tmpname);
*status = GIMP_PDB_EXECUTION_ERROR;
return -1;
}
}
else
{
FILE *input;
gchar buf[BUFSIZE];
gboolean seen_resolve = FALSE;
gboolean connected = FALSE;
gboolean file_found = FALSE;
gchar sizestr[32];
gint size = 0;
gchar *message;
gint i, j;
gchar dot;
gint kilobytes = 0;
gboolean finished = FALSE;
gboolean debug = FALSE;
#define DEBUG(x) if (debug) fprintf (stderr, (x))
close (p[1]);
input = fdopen (p[0], "r");
/* hardcoded and not-really-foolproof scanning of wget putput */
if (fgets (buf, BUFSIZE, input) == NULL)
{
/* no message here because failing on the first line means
* that wget was not found
*/
g_free (tmpname);
*status = GIMP_PDB_EXECUTION_ERROR;
return -1;
}
DEBUG (buf);
/* The second line is the local copy of the file */
if (fgets (buf, BUFSIZE, input) == NULL)
{
g_message ("wget exited abnormally on URL '%s'", filename);
g_free (tmpname);
*status = GIMP_PDB_EXECUTION_ERROR;
return -1;
}
DEBUG (buf);
/* The third line is "Connecting to..." */
gimp_progress_init ("Connecting to server... "
"(timeout is "TIMEOUT" seconds)");
read_connect:
if (fgets (buf, BUFSIZE, input) == NULL)
{
g_message ("wget exited abnormally on URL '%s'", filename);
g_free (tmpname);
*status = GIMP_PDB_EXECUTION_ERROR;
return -1;
}
else if (strstr (buf, "connected"))
{
connected = TRUE;
}
/* newer wgets have a "Resolving foo" line, so eat it */
else if (!seen_resolve && strstr (buf, "Resolving"))
{
seen_resolve = TRUE;
goto read_connect;
}
DEBUG (buf);
/* The fourth line is either the network request or an error */
gimp_progress_init ("Opening URL... "
"(timeout is "TIMEOUT" seconds)");
if (fgets (buf, BUFSIZE, input) == NULL)
{
g_message ("wget exited abnormally on URL '%s'", filename);
g_free (tmpname);
*status = GIMP_PDB_EXECUTION_ERROR;
return -1;
}
else if (! connected)
{
g_message ("A network error occured: %s", buf);
DEBUG (buf);
g_free (tmpname);
*status = GIMP_PDB_EXECUTION_ERROR;
return -1;
}
DEBUG (buf);
/* The fifth line is either the length of the file or an error */
if (fgets (buf, BUFSIZE, input) == NULL)
{
g_message ("wget exited abnormally on URL '%s'", filename);
g_free (tmpname);
*status = GIMP_PDB_EXECUTION_ERROR;
return -1;
}
else if (strstr (buf, "Length"))
{
file_found = TRUE;
}
else
{
g_message ("A network error occured: %s", buf);
DEBUG (buf);
g_free (tmpname);
*status = GIMP_PDB_EXECUTION_ERROR;
return -1;
}
DEBUG (buf);
if (sscanf (buf, "Length: %31s", sizestr) != 1)
{
g_message ("Could not parse wget's file length message");
g_free (tmpname);
*status = GIMP_PDB_EXECUTION_ERROR;
return -1;
}
/* strip away commas */
for (i = 0, j = 0; i < sizeof (sizestr); i++, j++)
{
if (sizestr[i] == ',')
i++;
sizestr[j] = sizestr[i];
if (sizestr[j] == '\0')
break;
}
size = atoi (sizestr);
/* Start the actual download... */
message = g_strdup_printf ("Downloading %d bytes of image data... "
"(timeout is "TIMEOUT" seconds)", size);
gimp_progress_init (message);
g_free (message);
/* Switch to byte parsing wget's output... */
while (1)
{
dot = fgetc (input);
if (feof (input))
break;
if (debug)
{
fputc (dot, stderr);
fflush (stderr);
}
if (dot == '.') /* one kilobyte */
{
kilobytes++;
gimp_progress_update ((gdouble) (kilobytes * 1024) /
(gdouble) size);
}
else if (dot == ':') /* the time string contains a ':' */
{
fgets (buf, BUFSIZE, input);
DEBUG (buf);
if (! strstr (buf, "error"))
{
finished = TRUE;
gimp_progress_update (1.0);
}
break;
}
}
if (! finished)
{
g_message ("wget exited before finishing downloading URL\n'%s'",
filename);
unlink (tmpname);
g_free (tmpname);
*status = GIMP_PDB_EXECUTION_ERROR;
return -1;
}
}
}
image_ID = gimp_file_load (GIMP_RUN_INTERACTIVE, tmpname, tmpname);
unlink (tmpname);
g_free (tmpname);
if (image_ID != -1)
{
*status = GIMP_PDB_SUCCESS;
if (name_image)
gimp_image_set_filename (image_ID, filename);
else
gimp_image_set_filename (image_ID, "");
}
else
*status = GIMP_PDB_EXECUTION_ERROR;
return image_ID;
}
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