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post.c
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post.c
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/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/* Cherokee
*
* Authors:
* Alvaro Lopez Ortega <alvaro@alobbs.com>
*
* Copyright (C) 2001-2006 Alvaro Lopez Ortega
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of version 2 of the GNU General Public
* License as published by the Free Software Foundation.
*
* 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
*/
#include "common-internal.h"
#include "post.h"
#include "util.h"
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#define ENTRIES "post"
ret_t
cherokee_post_init (cherokee_post_t *post)
{
post->type = post_undefined;
post->size = 0;
post->received = 0;
post->tmp_file_p = NULL;
post->walk_offset = 0;
cherokee_buffer_init (&post->info);
cherokee_buffer_init (&post->tmp_file);
return ret_ok;
}
ret_t
cherokee_post_mrproper (cherokee_post_t *post)
{
post->type = post_undefined;
post->size = 0;
post->received = 0;
post->walk_offset = 0;
if (post->tmp_file_p != NULL) {
fclose (post->tmp_file_p);
post->tmp_file_p = NULL;
}
if (!cherokee_buffer_is_empty (&post->tmp_file)) {
unlink (post->tmp_file.buf);
cherokee_buffer_mrproper (&post->tmp_file);
}
cherokee_buffer_mrproper (&post->info);
return ret_ok;
}
ret_t
cherokee_post_set_len (cherokee_post_t *post, size_t len)
{
post->type = (len > POST_SIZE_TO_DISK) ? post_in_tmp_file : post_in_memory;
post->size = len;
if (post->type == post_in_tmp_file) {
char *ptr;
char template[64];
strncpy (template, "/tmp/cherokee_post_XXXXXX", sizeof(template));
/* Generate a unique name
*/
ptr = mktemp (template);
if (unlikely (ptr == NULL))
return ret_error;
cherokee_buffer_add (&post->tmp_file, ptr, strlen(ptr));
/* Open the file for writting
*/
post->tmp_file_p = fopen (ptr, "w+");
if (unlikely (post->tmp_file_p == NULL))
return ret_error;
}
return ret_ok;
}
int
cherokee_post_is_empty (cherokee_post_t *post)
{
return (post->size <= 0);
}
int
cherokee_post_got_all (cherokee_post_t *post)
{
return (post->received >= post->size);
}
ret_t
cherokee_post_get_len (cherokee_post_t *post, size_t *len)
{
*len = post->size;
return ret_ok;
}
ret_t
cherokee_post_append (cherokee_post_t *post, char *str, size_t len)
{
cherokee_buffer_add (&post->info, str, len);
cherokee_post_commit_buf (post, len);
return ret_ok;
}
ret_t
cherokee_post_commit_buf (cherokee_post_t *post, size_t size)
{
size_t written;
if (size <= 0)
return ret_ok;
switch (post->type) {
case post_undefined:
return ret_error;
case post_in_memory:
post->received += size;
return ret_ok;
case post_in_tmp_file:
if (post->tmp_file_p == NULL)
return ret_error;
written = fwrite (post->info.buf, 1, post->info.len, post->tmp_file_p);
if (written < 0) return ret_error;
cherokee_buffer_move_to_begin (&post->info, written);
post->received += written;
return ret_ok;
}
return ret_error;
}
ret_t
cherokee_post_walk_reset (cherokee_post_t *post)
{
post->walk_offset = 0;
if (post->tmp_file_p != NULL) {
fseek (post->tmp_file_p, 0L, SEEK_SET);
}
return ret_ok;
}
ret_t
cherokee_post_walk_finished (cherokee_post_t *post)
{
switch (post->type) {
case post_in_memory:
return (post->walk_offset >= post->info.len) ? ret_ok : ret_eagain;
case post_in_tmp_file:
return (post->walk_offset >= post->size) ? ret_ok : ret_eagain;
default:
break;
}
SHOULDNT_HAPPEN;
return ret_error;
}
ret_t
cherokee_post_walk_to_fd (cherokee_post_t *post, int fd, int *eagain_fd, int *mode)
{
ssize_t r;
size_t ur;
/* Sanity check
*/
if (fd < 0) return ret_error;
/* Send a chunk..
*/
switch (post->type) {
case post_in_memory:
r = write (fd, post->info.buf + post->walk_offset,
post->info.len - post->walk_offset);
if (r < 0) {
if (errno == EAGAIN)
return ret_eagain;
TRACE(ENTRIES, "errno %d\n", errno);
return ret_error;
}
TRACE(ENTRIES, "wrote %d\n", r);
post->walk_offset += r;
return cherokee_post_walk_finished (post);
case post_in_tmp_file:
cherokee_buffer_ensure_size (&post->info, DEFAULT_READ_SIZE);
/* Read from the temp file is needed
*/
if (cherokee_buffer_is_empty (&post->info)) {
ur = fread (post->info.buf, 1, DEFAULT_READ_SIZE - 1, post->tmp_file_p);
if (ur <= 0) {
return (feof(post->tmp_file_p)) ? ret_ok : ret_error;
}
post->info.len = ur;
post->info.buf[ur] = '\0';
}
/* Write it to the fd
*/
r = write (fd, post->info.buf, post->info.len);
if (r < 0) {
if (errno == EAGAIN) {
if (eagain_fd) *eagain_fd = fd;
if (mode) *mode = 1;
return ret_eagain;
}
return ret_error;
}
else if (r == 0)
return ret_eagain;
cherokee_buffer_move_to_begin (&post->info, r);
post->walk_offset += r;
return cherokee_post_walk_finished (post);
default:
SHOULDNT_HAPPEN;
return ret_error;
}
return ret_ok;
}
ret_t
cherokee_post_walk_read (cherokee_post_t *post, cherokee_buffer_t *buf, cuint_t len)
{
size_t ur;
switch (post->type) {
case post_in_memory:
if (len > (post->info.len - post->walk_offset))
len = post->info.len - post->walk_offset;
cherokee_buffer_add (buf, post->info.buf + post->walk_offset, len);
post->walk_offset += len;
break;
case post_in_tmp_file:
cherokee_buffer_ensure_size (buf, buf->len + len + 1);
ur = fread (buf->buf + buf->len, 1, len, post->tmp_file_p);
if (ur <= 0) {
return (feof(post->tmp_file_p)) ? ret_ok : ret_error;
}
buf->len += ur;
buf->buf[buf->len] = '\0';
post->walk_offset += ur;
break;
default:
SHOULDNT_HAPPEN;
return ret_error;
}
return cherokee_post_walk_finished (post);
}