-/**
- * Delete a block.
- * @param $id identifier of the block.
- */
-function
-jirafeau_block_delete_ ($id)
-{
- $p = VAR_BLOCK . s2p ($id);
- if (!file_exists ($p))
- return;
-
- if (file_exists ($p . $id))
- unlink ($p . $id);
- if (file_exists ($p . $id . '_infos'))
- unlink ($p . $id . '_infos');
- $parse = $p;
- $scan = array();
- while (file_exists ($parse)
- && ($scan = scandir ($parse))
- && count ($scan) == 2 // '.' and '..' folders => empty.
- && basename ($parse) != basename (VAR_BLOCK))
- {
- rmdir ($parse);
- $parse = substr ($parse, 0, strlen($parse) - strlen(basename ($parse)) - 1);
- }
-}
-
-/**
- * Create a file filled with zeros.
- * @param $size size of the file.
- * @return a string corresponding to an id or the string "Error"
- */
-function
-jirafeau_block_init ($size)
-{
- if (!ctype_digit ($size) || $size <= 0)
- return "Error";
-
- /* Create folder. */
- $id;
- do
- {
- $id = jirafeau_gen_random (32);
- $p = VAR_BLOCK . s2p ($id);
- } while (file_exists ($p));
- @mkdir ($p, 0755, true);
- if (!file_exists ($p))
- {
- echo "Error";
- return;
- }
-
- /* Create block. */
- $p .= $id;
- $h = fopen ($p, 'w');
- $fill = str_repeat ("\0", 1024);
- for ($cnt = 0; $cnt < $size; $cnt += 1024)
- {
- if ($size - $cnt < 1024)
- $fill = str_repeat ("\0", $size - $cnt);
- if (fwrite ($h, $fill) === false)
- {
- fclose ($h);
- jirafeau_block_delete_ ($id);
- return "Error";
- }
- }
- fclose ($h);
-
- /* Generate a write/delete code. */
- $code = jirafeau_gen_random (12);
-
- /* Add block infos. */
- if (file_put_contents ($p . '_infos', date ('U') . NL . $size . NL . $code) === FALSE)
- {
- jirafeau_block_delete_ ($id);
- return "Error";
- }
-
- return $id . NL . $code;
-}
-
-/** Get block size in bytes.
- * @param $id identifier of the block
- * @return block size in bytes
- */
-function
-jirafeau_block_get_size ($id)
-{
- $p = VAR_BLOCK . s2p ($id) . $id;
- if (!file_exists ($p))
- return "Error";
-
- /* Check date. */
- $f = file ($p . '_infos');
- $date = trim ($f[0]);
- $block_size = trim ($f[1]);
- $stored_code = trim ($f[2]);
- /* Update date. */
- if (date ('U') - $date > JIRAFEAU_HOUR
- && date ('U') - $date < JIRAFEAU_MONTH)
- {
- if (file_put_contents ($p . '_infos', date ('U') . NL . $block_size . NL . $stored_code) === FALSE)
- {
- jirafeau_block_delete_ ($id);
- return "Error";
- }
- }
- /* Remove data. */
- elseif (date ('U') - $date >= JIRAFEAU_MONTH)
- {
- echo date ('U'). " $date ";
- jirafeau_block_delete_ ($id);
- return "Error";
- }
-
- return $block_size;
-}
-
-/**
- * Read some data in a block.
- * @param $id identifier of the block
- * @param $start where to read data (starting from zero).
- * @param $length length to read.
- * @return echo data
- */
-function
-jirafeau_block_read ($id, $start, $length)
-{
- if (!ctype_digit ($start) || $start < 0
- || !ctype_digit ($length) || $length <= 0)
- {
- echo "Error";
- return;
- }
-
- $p = VAR_BLOCK . s2p ($id) . $id;
- if (!file_exists ($p))
- {
- echo "Error";
- return;
- }
-
- /* Check date. */
- $f = file ($p . '_infos');
- $date = trim ($f[0]);
- $block_size = trim ($f[1]);
- $stored_code = trim ($f[2]);
- /* Update date. */
- if (date ('U') - $date > JIRAFEAU_HOUR
- && date ('U') - $date < JIRAFEAU_MONTH)
- {
- if (file_put_contents ($p . '_infos', date ('U') . NL . $block_size . NL . $stored_code) === FALSE)
- {
- jirafeau_block_delete_ ($id);
- echo "Error";
- return;
- }
- }
- /* Remove data. */
- elseif (date ('U') - $date >= JIRAFEAU_MONTH)
- {
- echo date ('U'). " $date ";
- jirafeau_block_delete_ ($id);
- echo "Error";
- return;
- }
-
- if ($start + $length > $block_size)
- {
- echo "Error";
- return;
- }
-
- /* Read content. */
- header ('Content-Length: ' . $length);
- header ('Content-Disposition: attachment');
-
- $r = fopen ($p, 'r');
- if (fseek ($r, $start) != 0)
- {
- echo "Error";
- return;
- }
- $c = 1024;
- for ($cnt = 0; $cnt < $length && !feof ($r); $cnt += 1024)
- {
- if ($length - $cnt < 1024)
- $c = $length - $cnt;
- print fread ($r, $c);
- ob_flush();
- }
- fclose ($r);
-}
-
-/**
- * Write some data in a block.
- * @param $id identifier of the block
- * @param $start where to writing data (starting from zero).
- * @param $data data to write.
- * @param $code code to allow writing.
- * @return string "Ok" or string "Error".
- */
-function
-jirafeau_block_write ($id, $start, $data, $code)
-{
- if (!ctype_digit ($start) || $start < 0
- || strlen ($code) == 0)
- return "Error";
-
- $p = VAR_BLOCK . s2p ($id) . $id;
- if (!file_exists ($p))
- return "Error";
-
- /* Check date. */
- $f = file ($p . '_infos');
- $date = trim ($f[0]);
- $block_size = trim ($f[1]);
- $stored_code = trim ($f[2]);
- /* Update date. */
- if (date ('U') - $date > JIRAFEAU_HOUR
- && date ('U') - $date < JIRAFEAU_MONTH)
- {
- if (file_put_contents ($p . '_infos', date ('U') . NL . $block_size . NL . $stored_code) === FALSE)
- {
- jirafeau_block_delete_ ($id);
- return "Error";
- }
- }
- /* Remove data. */
- elseif (date ('U') - $date >= JIRAFEAU_MONTH)
- {
- jirafeau_block_delete_ ($id);
- return "Error";
- }
-
- /* Check code. */
- if ($stored_code != $code)
- {
- echo "Error";
- return;
- }
-
- /* Check data. */
- $size = $data['size'];
- if ($size <= 0)
- return "Error";
- if ($start + $size > $block_size)
- return "Error";
-
- /* Open data. */
- $r = fopen ($data['tmp_name'], 'r');
-
- /* Open Block. */
- $w = fopen ($p, 'r+');
- if (fseek ($w, $start) != 0)
- return "Error";
-
- /* Write content. */
- $c = 1024;
- for ($cnt = 0; $cnt <= $size && !feof ($w); $cnt += 1024)
- {
- if ($size - $cnt < 1024)
- $c = $size - $cnt;
- $d = fread ($r, $c);
- fwrite ($w, $d);
- }
- fclose ($r);
- fclose ($w);
- unlink ($data['tmp_name']);
- return "Ok";
-}
-
-/**
- * Delete a block.
- * @param $id identifier of the block.
- * @param $code code to allow writing.
- * @return string "Ok" or string "Error".
- */
git.p6c8.net / jirafeau_project.git / blobdiff