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Write files in segments.

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This commit is contained in:
Lars Jung 2013-07-19 00:13:44 +02:00
parent ab45b3072c
commit 694ababf15
1 changed files with 12 additions and 1 deletions
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13
src/_h5ai/server/php/inc/Archive.php
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@ -2,6 +2,7 @@
class Archive { class Archive {
private static $SEGMENT_SIZE = 16777216; // 1024 * 1024 * 16 = 16MiB
private static $TAR_PASSTHRU_CMD = "cd [ROOTDIR] && tar --no-recursion -c -- [DIRS] [FILES]"; private static $TAR_PASSTHRU_CMD = "cd [ROOTDIR] && tar --no-recursion -c -- [DIRS] [FILES]";
private static $ZIP_PASSTHRU_CMD = "cd [ROOTDIR] && zip - -- [FILES]"; private static $ZIP_PASSTHRU_CMD = "cd [ROOTDIR] && zip - -- [FILES]";
@ -59,6 +60,7 @@ class Archive {
// POSIX.1-1988 UStar implementation, by @TvdW // POSIX.1-1988 UStar implementation, by @TvdW
set_time_limit(0);
$root_path = $this->app->get_abs_path(); $root_path = $this->app->get_abs_path();
// Build a list of filesizes so we can predict the total size // Build a list of filesizes so we can predict the total size
@ -110,7 +112,16 @@ class Archive {
$file_header = substr_replace($file_header, $checksum, 148, 8); $file_header = substr_replace($file_header, $checksum, 148, 8);
echo $file_header; echo $file_header;
readfile($file);
// Send file content in segments to not hit PHP's memory limit (default: 128M)
if ($fd = fopen($file, 'rb')) {
while (!feof($fd)) {
print fread($fd, Archive::$SEGMENT_SIZE);
ob_flush();
flush();
}
fclose($fd);
}
$pad_file = 512 - ($size % 512); $pad_file = 512 - ($size % 512);
if ($pad_file) echo str_repeat("\0", $pad_file); if ($pad_file) echo str_repeat("\0", $pad_file);