Add X-Sendfile-Range feature (fixes #2005)

git-svn-id: svn://svn.lighttpd.net/lighttpd/branches/lighttpd-1.4.x@2531 152afb58-edef-0310-8abb-c4023f1b3aa9

NEWS

@@ -53,6 +53,7 @@ NEWS
   * Add support for "real" entropy from /dev/[u]random (fixes #1977)
   * Adding support for additional chars in LDAP usernames (fixes #1941)
   * Ignore multiple "If-None-Match" headers (only use first one, fixes #753)
+  * Add X-Sendfile-Range feature (fixes #2005)
 
 - 1.4.22 - 2009-03-07
   * Fix wrong lua type for CACHE_MISS/CACHE_HIT in mod_cml (fixes #533)

src/mod_fastcgi.c

@@ -2554,22 +2554,51 @@ static int fcgi_demux_response(server *srv, handler_ctx *hctx) {
 					stat_cache_entry *sce;
 
 					if (HANDLER_ERROR != stat_cache_get_entry(srv, con, ds->value, &sce)) {
-						data_string *dcls;
+						data_string *dcls, *dsr;
+						off_t start = 0, end = sce->st.st_size, len;
 						if (NULL == (dcls = (data_string *)array_get_unused_element(con->response.headers, TYPE_STRING))) {
 							dcls = data_response_init();
 						}
 						/* found */
-						http_chunk_append_file(srv, con, ds->value, 0, sce->st.st_size);
+						/* Assume we should serve from the beginning to the end of the file. */
+						/* If they gave us X-Sendfile-Range, adjust portion to serve. */
+						/* X-Sendfile-Range: header must include start offset, may include end offset, must end after the last offset */
+						if (NULL != (dsr = (data_string *) array_get_element(con->response.headers, "X-Sendfile-Range"))) {
+							char *end_part = NULL, *final_part = NULL;
+							start = strtoll(dsr->value->ptr, &end_part, 10);
+							if (start < 0 || end_part == ds->value->ptr) {
+								start = 0;
+								log_error_write(srv, __FILE__, __LINE__, "sb",
+									"Invalid X-Sendfile-Range header:",
+									dsr->value);
+							} else if (end_part && *end_part) {
+								end = strtoll(end_part, &final_part, 10);
+								if (end < 0 || end_part == final_part || !final_part || *final_part || start > end) {
+									start = 0;
+									end = sce->st.st_size;
+									log_error_write(srv, __FILE__, __LINE__, "sb",
+										"Invalid X-Sendfile-Range header:",
+										dsr->value);
+								} else {
+									if (end > sce->st.st_size) end = sce->st.st_size;
+									if (start > end) start = end;
+								}
+							} else {
+								if (start > end) start = end;
+							}
+						}
+						len = end - start;
+						if (len != 0) http_chunk_append_file(srv, con, ds->value, start, len);
 						hctx->send_content_body = 0; /* ignore the content */
 						joblist_append(srv, con);
 
-						buffer_copy_string_len(dcls->key, "Content-Length", sizeof("Content-Length")-1);
-						buffer_copy_off_t(dcls->value, sce->st.st_size);
+						buffer_copy_string_len(dcls->key, CONST_STR_LEN("Content-Length"));
+						buffer_copy_off_t(dcls->value, len);
 						dcls = (data_string*) array_replace(con->response.headers, (data_unset *)dcls);
 						if (dcls) dcls->free((data_unset*)dcls);
 
 						con->parsed_response |= HTTP_CONTENT_LENGTH;
-						con->response.content_length = sce->st.st_size;
+						con->response.content_length = len;
 					} else {
 						log_error_write(srv, __FILE__, __LINE__, "sb",
 							"send-file error: couldn't get stat_cache entry for:",

src/response.c

@@ -65,7 +65,7 @@ int http_response_write_header(server *srv, connection *con) {
 
 		if (ds->value->used && ds->key->used &&
 		    0 != strncasecmp(ds->key->ptr, CONST_STR_LEN("X-LIGHTTPD-")) &&
-			0 != strcasecmp(ds->key->ptr, "X-Sendfile")) {
+			0 != strncasecmp(ds->key->ptr, CONST_STR_LEN("X-Sendfile"))) {
 			if (0 == strcasecmp(ds->key->ptr, "Date")) have_date = 1;
 			if (0 == strcasecmp(ds->key->ptr, "Server")) have_server = 1;
 			if (0 == strcasecmp(ds->key->ptr, "Content-Encoding") && 304 == con->http_status) continue;

tests/docroot/www/sendfile.php

@@ -0,0 +1,7 @@
+<?php
+
+header("X-Sendfile: " . getcwd() . "/index.txt");
+
+if ($_GET["range"]) header("X-Sendfile-Range: " . $_GET["range"]);
+
+?>

tests/lighttpd.conf

@@ -82,7 +82,7 @@ $HTTP["url"] =~ "\.pdf$" {
 }
 
 fastcgi.debug               = 0
-fastcgi.server              = ( ".php" =>        ( ( "host" => "127.0.0.1", "port" => 1026, "broken-scriptfilename" => "enable" ) ),
+fastcgi.server              = ( ".php" =>        ( ( "host" => "127.0.0.1", "port" => 1026, "broken-scriptfilename" => "enable", "allow-x-send-file" => "enable" ) ),
 			        "/prefix.fcgi" => ( ( "host" => "127.0.0.1", "port" => 1026, "check-local" => "disable", "broken-scriptfilename" => "enable" ) )
 			      )
 

tests/mod-fastcgi.t

@@ -7,7 +7,7 @@ BEGIN {
 }
 
 use strict;
-use Test::More tests => 53;
+use Test::More tests => 55;
 use LightyTest;
 
 my $tf = LightyTest->new();
@@ -25,7 +25,7 @@ SKIP: {
 }
 
 SKIP: {
-	skip "no PHP running on port 1026", 30 unless $tf->listening_on(1026);
+	skip "no PHP running on port 1026", 32 unless $tf->listening_on(1026);
 
 	ok($tf->start_proc == 0, "Starting lighttpd") or goto cleanup;
 
@@ -174,6 +174,20 @@ EOF
 	$t->{RESPONSE} = [ { 'HTTP-Protocol' => 'HTTP/1.0', 'HTTP-Status' => 200, 'HTTP-Content' => '/foo/bar' } ];
 	ok($tf->handle_http($t) == 0, 'PATH_INFO, check-local off');
 
+	$t->{REQUEST}  = ( <<EOF
+GET /sendfile.php HTTP/1.0
+EOF
+ );
+	$t->{RESPONSE} = [ { 'HTTP-Protocol' => 'HTTP/1.0', 'HTTP-Status' => 200, 'Content-Length' => 4348 } ];
+	ok($tf->handle_http($t) == 0, 'X-Sendfile');
+
+	$t->{REQUEST}  = ( <<EOF
+GET /sendfile.php?range=3+10 HTTP/1.0
+EOF
+ );
+	$t->{RESPONSE} = [ { 'HTTP-Protocol' => 'HTTP/1.0', 'HTTP-Status' => 200, 'HTTP-Content' => 'OCTYPE ' } ];
+	ok($tf->handle_http($t) == 0, 'X-Sendfile-Range');
+
 
 	ok($tf->stop_proc == 0, "Stopping lighttpd");