Major refactors; implement ranges

Signed-off-by: Laurent Bercot <ska@appnovation.com>

24 files changed, 384 insertions, 123 deletions

diff --git a/doc/future.html b/doc/future.html
index 1a8c3e5..512f3b7 100644
--- a/doc/future.html
+++ b/doc/future.html
@@ -25,23 +25,6 @@ of HTTP that would be nice to have, and that may be implemented at some point
 down the line.
 </p>
 
-<h2> Ranges </h2>
-
-<p>
- <a href="https://datatracker.ietf.org/doc/html/rfc9110#section-14">Ranges</a>
-are a useful part of HTTP when you are serving big files and connections may
-be interrupted and restarted: supporting the <tt>Range:</tt> header can save
-bandwidth, if the client only asks for the parts of the files that it's still
-missing.
-</p>
-
-<p>
- It hasn't been implemented in tipidee yet because parsing the <tt>Range:</tt>
-header is rather complex, and serving parts of files (as opposed to full files
-sequentially) also requires some extra coding that wasn't deemed worth it for
-an initial release.
-</p>
-
 <h2> HTTP Basic Authentication </h2>
 
 <p>
diff --git a/package/deps.mak b/package/deps.mak
index cd49648..b5296c5 100644
--- a/package/deps.mak
+++ b/package/deps.mak
@@ -42,28 +42,34 @@ src/libtipidee/tipidee_log_start.o src/libtipidee/tipidee_log_start.lo: src/libt
 src/libtipidee/tipidee_method.o src/libtipidee/tipidee_method.lo: src/libtipidee/tipidee_method.c src/include/tipidee/method.h
 src/libtipidee/tipidee_response_error_nofile.o src/libtipidee/tipidee_response_error_nofile.lo: src/libtipidee/tipidee_response_error_nofile.c src/include/tipidee/method.h src/include/tipidee/response.h
 src/libtipidee/tipidee_response_error_nofile_G.o src/libtipidee/tipidee_response_error_nofile_G.lo: src/libtipidee/tipidee_response_error_nofile_G.c src/include/tipidee/response.h
-src/libtipidee/tipidee_response_file.o src/libtipidee/tipidee_response_file.lo: src/libtipidee/tipidee_response_file.c src/include/tipidee/conf.h src/include/tipidee/method.h src/include/tipidee/response.h src/include/tipidee/rql.h src/include/tipidee/util.h
+src/libtipidee/tipidee_response_file.o src/libtipidee/tipidee_response_file.lo: src/libtipidee/tipidee_response_file.c src/include/tipidee/response.h
 src/libtipidee/tipidee_response_file_G.o src/libtipidee/tipidee_response_file_G.lo: src/libtipidee/tipidee_response_file_G.c src/include/tipidee/response.h
 src/libtipidee/tipidee_response_header_date.o src/libtipidee/tipidee_response_header_date.lo: src/libtipidee/tipidee_response_header_date.c src/include/tipidee/response.h
 src/libtipidee/tipidee_response_header_date_G.o src/libtipidee/tipidee_response_header_date_G.lo: src/libtipidee/tipidee_response_header_date_G.c src/include/tipidee/response.h
 src/libtipidee/tipidee_response_header_date_fmt.o src/libtipidee/tipidee_response_header_date_fmt.lo: src/libtipidee/tipidee_response_header_date_fmt.c src/include/tipidee/response.h
+src/libtipidee/tipidee_response_header_end.o src/libtipidee/tipidee_response_header_end.lo: src/libtipidee/tipidee_response_header_end.c src/include/tipidee/response.h
 src/libtipidee/tipidee_response_header_lastmodified.o src/libtipidee/tipidee_response_header_lastmodified.lo: src/libtipidee/tipidee_response_header_lastmodified.c src/include/tipidee/response.h
 src/libtipidee/tipidee_response_header_preparebuiltin.o src/libtipidee/tipidee_response_header_preparebuiltin.lo: src/libtipidee/tipidee_response_header_preparebuiltin.c src/include/tipidee/response.h
+src/libtipidee/tipidee_response_header_write.o src/libtipidee/tipidee_response_header_write.lo: src/libtipidee/tipidee_response_header_write.c src/include/tipidee/response.h
 src/libtipidee/tipidee_response_header_writeall.o src/libtipidee/tipidee_response_header_writeall.lo: src/libtipidee/tipidee_response_header_writeall.c src/include/tipidee/response.h
 src/libtipidee/tipidee_response_header_writeall_G.o src/libtipidee/tipidee_response_header_writeall_G.lo: src/libtipidee/tipidee_response_header_writeall_G.c src/include/tipidee/response.h
 src/libtipidee/tipidee_response_header_writemerge.o src/libtipidee/tipidee_response_header_writemerge.lo: src/libtipidee/tipidee_response_header_writemerge.c src/include/tipidee/headers.h src/include/tipidee/response.h
 src/libtipidee/tipidee_response_header_writemerge_G.o src/libtipidee/tipidee_response_header_writemerge_G.lo: src/libtipidee/tipidee_response_header_writemerge_G.c src/include/tipidee/response.h
+src/libtipidee/tipidee_response_partial.o src/libtipidee/tipidee_response_partial.lo: src/libtipidee/tipidee_response_partial.c src/include/tipidee/response.h src/include/tipidee/util.h
+src/libtipidee/tipidee_response_partial_G.o src/libtipidee/tipidee_response_partial_G.lo: src/libtipidee/tipidee_response_partial_G.c src/include/tipidee/response.h
 src/libtipidee/tipidee_response_status.o src/libtipidee/tipidee_response_status.lo: src/libtipidee/tipidee_response_status.c src/include/tipidee/response.h
 src/libtipidee/tipidee_rql_read.o src/libtipidee/tipidee_rql_read.lo: src/libtipidee/tipidee_rql_read.c src/include/tipidee/method.h src/include/tipidee/rql.h src/include/tipidee/uri.h
 src/libtipidee/tipidee_uri_parse.o src/libtipidee/tipidee_uri_parse.lo: src/libtipidee/tipidee_uri_parse.c src/include/tipidee/uri.h
 src/libtipidee/tipidee_util_chunked_read.o src/libtipidee/tipidee_util_chunked_read.lo: src/libtipidee/tipidee_util_chunked_read.c src/include/tipidee/util.h
 src/libtipidee/tipidee_util_defaulttext.o src/libtipidee/tipidee_util_defaulttext.lo: src/libtipidee/tipidee_util_defaulttext.c src/include/tipidee/util.h
 src/libtipidee/tipidee_util_httpdate.o src/libtipidee/tipidee_util_httpdate.lo: src/libtipidee/tipidee_util_httpdate.c src/include/tipidee/util.h
+src/libtipidee/tipidee_util_parse_range.o src/libtipidee/tipidee_util_parse_range.lo: src/libtipidee/tipidee_util_parse_range.c src/include/tipidee/util.h
 src/tipideed/cgi.o src/tipideed/cgi.lo: src/tipideed/cgi.c src/include/tipidee/tipidee.h src/tipideed/tipideed-internal.h
+src/tipideed/errors.o src/tipideed/errors.lo: src/tipideed/errors.c src/include/tipidee/log.h src/include/tipidee/response.h src/include/tipidee/util.h src/tipideed/tipideed-internal.h
 src/tipideed/harden.o src/tipideed/harden.lo: src/tipideed/harden.c src/tipideed/tipideed-internal.h
 src/tipideed/options.o src/tipideed/options.lo: src/tipideed/options.c src/include/tipidee/log.h src/include/tipidee/response.h src/tipideed/tipideed-internal.h
+src/tipideed/redirection.o src/tipideed/redirection.lo: src/tipideed/redirection.c src/include/tipidee/log.h src/include/tipidee/response.h src/include/tipidee/util.h src/tipideed/tipideed-internal.h
 src/tipideed/regular.o src/tipideed/regular.lo: src/tipideed/regular.c src/include/tipidee/log.h src/include/tipidee/method.h src/include/tipidee/response.h src/tipideed/tipideed-internal.h
-src/tipideed/responses.o src/tipideed/responses.lo: src/tipideed/responses.c src/include/tipidee/log.h src/include/tipidee/response.h src/include/tipidee/util.h src/tipideed/tipideed-internal.h
 src/tipideed/send_file.o src/tipideed/send_file.lo: src/tipideed/send_file.c src/tipideed/tipideed-internal.h
 src/tipideed/tipideed.o src/tipideed/tipideed.lo: src/tipideed/tipideed.c src/include/tipidee/tipidee.h src/tipideed/tipideed-internal.h
 src/tipideed/trace.o src/tipideed/trace.lo: src/tipideed/trace.c src/include/tipidee/log.h src/include/tipidee/method.h src/include/tipidee/response.h src/tipideed/tipideed-internal.h
@@ -74,12 +80,12 @@ tipidee-config: src/config/tipidee-config.o src/config/util.o src/config/node.o
 tipidee-config-preprocess: EXTRA_LIBS := -lskarnet
 tipidee-config-preprocess: src/config/tipidee-config-preprocess.o
 ifeq ($(strip $(STATIC_LIBS_ARE_PIC)),)
-libtipidee.a.xyzzy: src/libtipidee/tipidee_conf_free.o src/libtipidee/tipidee_conf_get.o src/libtipidee/tipidee_conf_get_argv.o src/libtipidee/tipidee_conf_get_content_type.o src/libtipidee/tipidee_conf_get_errorfile.o src/libtipidee/tipidee_conf_get_redirection.o src/libtipidee/tipidee_conf_get_resattr.o src/libtipidee/tipidee_conf_get_resattr1.o src/libtipidee/tipidee_conf_get_responseheaders.o src/libtipidee/tipidee_conf_get_string.o src/libtipidee/tipidee_conf_get_uint32.o src/libtipidee/tipidee_conf_init.o src/libtipidee/tipidee_headers_get_content_length.o src/libtipidee/tipidee_headers_init.o src/libtipidee/tipidee_headers_parse.o src/libtipidee/tipidee_headers_search.o src/libtipidee/tipidee_log_answer.o src/libtipidee/tipidee_log_exit.o src/libtipidee/tipidee_log_resource.o src/libtipidee/tipidee_log_request.o src/libtipidee/tipidee_log_start.o src/libtipidee/tipidee_method.o src/libtipidee/tipidee_response_error_nofile.o src/libtipidee/tipidee_response_error_nofile_G.o src/libtipidee/tipidee_response_file.o src/libtipidee/tipidee_response_file_G.o src/libtipidee/tipidee_response_header_date.o src/libtipidee/tipidee_response_header_date_G.o src/libtipidee/tipidee_response_header_date_fmt.o src/libtipidee/tipidee_response_header_lastmodified.o src/libtipidee/tipidee_response_header_preparebuiltin.o src/libtipidee/tipidee_response_header_writeall.o src/libtipidee/tipidee_response_header_writeall_G.o src/libtipidee/tipidee_response_header_writemerge.o src/libtipidee/tipidee_response_header_writemerge_G.o src/libtipidee/tipidee_response_status.o src/libtipidee/tipidee_rql_read.o src/libtipidee/tipidee_uri_parse.o src/libtipidee/tipidee_util_chunked_read.o src/libtipidee/tipidee_util_defaulttext.o src/libtipidee/tipidee_util_httpdate.o
+libtipidee.a.xyzzy: src/libtipidee/tipidee_conf_free.o src/libtipidee/tipidee_conf_get.o src/libtipidee/tipidee_conf_get_argv.o src/libtipidee/tipidee_conf_get_content_type.o src/libtipidee/tipidee_conf_get_errorfile.o src/libtipidee/tipidee_conf_get_redirection.o src/libtipidee/tipidee_conf_get_resattr.o src/libtipidee/tipidee_conf_get_resattr1.o src/libtipidee/tipidee_conf_get_responseheaders.o src/libtipidee/tipidee_conf_get_string.o src/libtipidee/tipidee_conf_get_uint32.o src/libtipidee/tipidee_conf_init.o src/libtipidee/tipidee_headers_get_content_length.o src/libtipidee/tipidee_headers_init.o src/libtipidee/tipidee_headers_parse.o src/libtipidee/tipidee_headers_search.o src/libtipidee/tipidee_log_answer.o src/libtipidee/tipidee_log_exit.o src/libtipidee/tipidee_log_request.o src/libtipidee/tipidee_log_resource.o src/libtipidee/tipidee_log_start.o src/libtipidee/tipidee_method.o src/libtipidee/tipidee_response_error_nofile.o src/libtipidee/tipidee_response_error_nofile_G.o src/libtipidee/tipidee_response_file.o src/libtipidee/tipidee_response_file_G.o src/libtipidee/tipidee_response_header_date.o src/libtipidee/tipidee_response_header_date_G.o src/libtipidee/tipidee_response_header_date_fmt.o src/libtipidee/tipidee_response_header_end.o src/libtipidee/tipidee_response_header_lastmodified.o src/libtipidee/tipidee_response_header_preparebuiltin.o src/libtipidee/tipidee_response_header_write.o src/libtipidee/tipidee_response_header_writeall.o src/libtipidee/tipidee_response_header_writeall_G.o src/libtipidee/tipidee_response_header_writemerge.o src/libtipidee/tipidee_response_header_writemerge_G.o src/libtipidee/tipidee_response_partial.o src/libtipidee/tipidee_response_partial_G.o src/libtipidee/tipidee_response_status.o src/libtipidee/tipidee_rql_read.o src/libtipidee/tipidee_uri_parse.o src/libtipidee/tipidee_util_chunked_read.o src/libtipidee/tipidee_util_defaulttext.o src/libtipidee/tipidee_util_httpdate.o src/libtipidee/tipidee_util_parse_range.o
 else
-libtipidee.a.xyzzy: src/libtipidee/tipidee_conf_free.lo src/libtipidee/tipidee_conf_get.lo src/libtipidee/tipidee_conf_get_argv.lo src/libtipidee/tipidee_conf_get_content_type.lo src/libtipidee/tipidee_conf_get_errorfile.lo src/libtipidee/tipidee_conf_get_redirection.lo src/libtipidee/tipidee_conf_get_resattr.lo src/libtipidee/tipidee_conf_get_resattr1.lo src/libtipidee/tipidee_conf_get_responseheaders.lo src/libtipidee/tipidee_conf_get_string.lo src/libtipidee/tipidee_conf_get_uint32.lo src/libtipidee/tipidee_conf_init.lo src/libtipidee/tipidee_headers_get_content_length.lo src/libtipidee/tipidee_headers_init.lo src/libtipidee/tipidee_headers_parse.lo src/libtipidee/tipidee_headers_search.lo src/libtipidee/tipidee_log_answer.lo src/libtipidee/tipidee_log_exit.lo src/libtipidee/tipidee_log_resource.lo src/libtipidee/tipidee_log_request.lo src/libtipidee/tipidee_log_start.lo src/libtipidee/tipidee_method.lo src/libtipidee/tipidee_response_error_nofile.lo src/libtipidee/tipidee_response_error_nofile_G.lo src/libtipidee/tipidee_response_file.lo src/libtipidee/tipidee_response_file_G.lo src/libtipidee/tipidee_response_header_date.lo src/libtipidee/tipidee_response_header_date_G.lo src/libtipidee/tipidee_response_header_date_fmt.lo src/libtipidee/tipidee_response_header_lastmodified.lo src/libtipidee/tipidee_response_header_preparebuiltin.lo src/libtipidee/tipidee_response_header_writeall.lo src/libtipidee/tipidee_response_header_writeall_G.lo src/libtipidee/tipidee_response_header_writemerge.lo src/libtipidee/tipidee_response_header_writemerge_G.lo src/libtipidee/tipidee_response_status.lo src/libtipidee/tipidee_rql_read.lo src/libtipidee/tipidee_uri_parse.lo src/libtipidee/tipidee_util_chunked_read.lo src/libtipidee/tipidee_util_defaulttext.lo src/libtipidee/tipidee_util_httpdate.lo
+libtipidee.a.xyzzy: src/libtipidee/tipidee_conf_free.lo src/libtipidee/tipidee_conf_get.lo src/libtipidee/tipidee_conf_get_argv.lo src/libtipidee/tipidee_conf_get_content_type.lo src/libtipidee/tipidee_conf_get_errorfile.lo src/libtipidee/tipidee_conf_get_redirection.lo src/libtipidee/tipidee_conf_get_resattr.lo src/libtipidee/tipidee_conf_get_resattr1.lo src/libtipidee/tipidee_conf_get_responseheaders.lo src/libtipidee/tipidee_conf_get_string.lo src/libtipidee/tipidee_conf_get_uint32.lo src/libtipidee/tipidee_conf_init.lo src/libtipidee/tipidee_headers_get_content_length.lo src/libtipidee/tipidee_headers_init.lo src/libtipidee/tipidee_headers_parse.lo src/libtipidee/tipidee_headers_search.lo src/libtipidee/tipidee_log_answer.lo src/libtipidee/tipidee_log_exit.lo src/libtipidee/tipidee_log_request.lo src/libtipidee/tipidee_log_resource.lo src/libtipidee/tipidee_log_start.lo src/libtipidee/tipidee_method.lo src/libtipidee/tipidee_response_error_nofile.lo src/libtipidee/tipidee_response_error_nofile_G.lo src/libtipidee/tipidee_response_file.lo src/libtipidee/tipidee_response_file_G.lo src/libtipidee/tipidee_response_header_date.lo src/libtipidee/tipidee_response_header_date_G.lo src/libtipidee/tipidee_response_header_date_fmt.lo src/libtipidee/tipidee_response_header_end.lo src/libtipidee/tipidee_response_header_lastmodified.lo src/libtipidee/tipidee_response_header_preparebuiltin.lo src/libtipidee/tipidee_response_header_write.lo src/libtipidee/tipidee_response_header_writeall.lo src/libtipidee/tipidee_response_header_writeall_G.lo src/libtipidee/tipidee_response_header_writemerge.lo src/libtipidee/tipidee_response_header_writemerge_G.lo src/libtipidee/tipidee_response_partial.lo src/libtipidee/tipidee_response_partial_G.lo src/libtipidee/tipidee_response_status.lo src/libtipidee/tipidee_rql_read.lo src/libtipidee/tipidee_uri_parse.lo src/libtipidee/tipidee_util_chunked_read.lo src/libtipidee/tipidee_util_defaulttext.lo src/libtipidee/tipidee_util_httpdate.lo src/libtipidee/tipidee_util_parse_range.lo
 endif
 libtipidee.so.xyzzy: EXTRA_LIBS := -lskarnet
-libtipidee.so.xyzzy: src/libtipidee/tipidee_conf_free.lo src/libtipidee/tipidee_conf_get.lo src/libtipidee/tipidee_conf_get_argv.lo src/libtipidee/tipidee_conf_get_content_type.lo src/libtipidee/tipidee_conf_get_errorfile.lo src/libtipidee/tipidee_conf_get_redirection.lo src/libtipidee/tipidee_conf_get_resattr.lo src/libtipidee/tipidee_conf_get_resattr1.lo src/libtipidee/tipidee_conf_get_responseheaders.lo src/libtipidee/tipidee_conf_get_string.lo src/libtipidee/tipidee_conf_get_uint32.lo src/libtipidee/tipidee_conf_init.lo src/libtipidee/tipidee_headers_get_content_length.lo src/libtipidee/tipidee_headers_init.lo src/libtipidee/tipidee_headers_parse.lo src/libtipidee/tipidee_headers_search.lo src/libtipidee/tipidee_log_answer.lo src/libtipidee/tipidee_log_exit.lo src/libtipidee/tipidee_log_resource.lo src/libtipidee/tipidee_log_request.lo src/libtipidee/tipidee_log_start.lo src/libtipidee/tipidee_method.lo src/libtipidee/tipidee_response_error_nofile.lo src/libtipidee/tipidee_response_error_nofile_G.lo src/libtipidee/tipidee_response_file.lo src/libtipidee/tipidee_response_file_G.lo src/libtipidee/tipidee_response_header_date.lo src/libtipidee/tipidee_response_header_date_G.lo src/libtipidee/tipidee_response_header_date_fmt.lo src/libtipidee/tipidee_response_header_lastmodified.lo src/libtipidee/tipidee_response_header_preparebuiltin.lo src/libtipidee/tipidee_response_header_writeall.lo src/libtipidee/tipidee_response_header_writeall_G.lo src/libtipidee/tipidee_response_header_writemerge.lo src/libtipidee/tipidee_response_header_writemerge_G.lo src/libtipidee/tipidee_response_status.lo src/libtipidee/tipidee_rql_read.lo src/libtipidee/tipidee_uri_parse.lo src/libtipidee/tipidee_util_chunked_read.lo src/libtipidee/tipidee_util_defaulttext.lo src/libtipidee/tipidee_util_httpdate.lo
+libtipidee.so.xyzzy: src/libtipidee/tipidee_conf_free.lo src/libtipidee/tipidee_conf_get.lo src/libtipidee/tipidee_conf_get_argv.lo src/libtipidee/tipidee_conf_get_content_type.lo src/libtipidee/tipidee_conf_get_errorfile.lo src/libtipidee/tipidee_conf_get_redirection.lo src/libtipidee/tipidee_conf_get_resattr.lo src/libtipidee/tipidee_conf_get_resattr1.lo src/libtipidee/tipidee_conf_get_responseheaders.lo src/libtipidee/tipidee_conf_get_string.lo src/libtipidee/tipidee_conf_get_uint32.lo src/libtipidee/tipidee_conf_init.lo src/libtipidee/tipidee_headers_get_content_length.lo src/libtipidee/tipidee_headers_init.lo src/libtipidee/tipidee_headers_parse.lo src/libtipidee/tipidee_headers_search.lo src/libtipidee/tipidee_log_answer.lo src/libtipidee/tipidee_log_exit.lo src/libtipidee/tipidee_log_request.lo src/libtipidee/tipidee_log_resource.lo src/libtipidee/tipidee_log_start.lo src/libtipidee/tipidee_method.lo src/libtipidee/tipidee_response_error_nofile.lo src/libtipidee/tipidee_response_error_nofile_G.lo src/libtipidee/tipidee_response_file.lo src/libtipidee/tipidee_response_file_G.lo src/libtipidee/tipidee_response_header_date.lo src/libtipidee/tipidee_response_header_date_G.lo src/libtipidee/tipidee_response_header_date_fmt.lo src/libtipidee/tipidee_response_header_end.lo src/libtipidee/tipidee_response_header_lastmodified.lo src/libtipidee/tipidee_response_header_preparebuiltin.lo src/libtipidee/tipidee_response_header_write.lo src/libtipidee/tipidee_response_header_writeall.lo src/libtipidee/tipidee_response_header_writeall_G.lo src/libtipidee/tipidee_response_header_writemerge.lo src/libtipidee/tipidee_response_header_writemerge_G.lo src/libtipidee/tipidee_response_partial.lo src/libtipidee/tipidee_response_partial_G.lo src/libtipidee/tipidee_response_status.lo src/libtipidee/tipidee_rql_read.lo src/libtipidee/tipidee_uri_parse.lo src/libtipidee/tipidee_util_chunked_read.lo src/libtipidee/tipidee_util_defaulttext.lo src/libtipidee/tipidee_util_httpdate.lo src/libtipidee/tipidee_util_parse_range.lo
 tipideed: EXTRA_LIBS := -lskarnet
-tipideed: src/tipideed/tipideed.o src/tipideed/cgi.o src/tipideed/harden.o src/tipideed/options.o src/tipideed/regular.o src/tipideed/responses.o src/tipideed/send_file.o src/tipideed/trace.o src/tipideed/util.o libtipidee.a.xyzzy
+tipideed: src/tipideed/tipideed.o src/tipideed/cgi.o src/tipideed/errors.o src/tipideed/harden.o src/tipideed/options.o src/tipideed/regular.o src/tipideed/redirection.o src/tipideed/send_file.o src/tipideed/trace.o src/tipideed/util.o libtipidee.a.xyzzy
 INTERNAL_LIBS :=
diff --git a/src/config/headers.c b/src/config/headers.c
index 0afdfb3..c3aa94c 100644
--- a/src/config/headers.c
+++ b/src/config/headers.c
@@ -21,7 +21,7 @@ struct builtinheaders_s
 
 static struct builtinheaders_s const builtinheaders[] =
 {
-  { .key = "Accept-Ranges", .value = "none", .overridable = 0 },
+  { .key = "Accept-Ranges", .value = "bytes", .overridable = 0 },
   { .key = "Allow", .value = 0, .overridable = 0 },
   { .key = "Cache-Control", .value = "private", .overridable = 1 },
   { .key = "Connection", .value = 0, .overridable = 0 },
diff --git a/src/include/tipidee/response.h b/src/include/tipidee/response.h
index 31b8df4..f912cd3 100644
--- a/src/include/tipidee/response.h
+++ b/src/include/tipidee/response.h
@@ -10,6 +10,7 @@
 
 #include <skalibs/gccattributes.h>
 #include <skalibs/stat.h>
+#include <skalibs/uint64.h>
 #include <skalibs/buffer.h>
 #include <skalibs/strerr.h>
 #include <skalibs/tai.h>
@@ -35,21 +36,24 @@ extern size_t tipidee_response_header_date_G (char *, size_t) ;
 
 extern size_t tipidee_response_header_lastmodified (char *, size_t, struct stat const *) ;
 
+extern size_t tipidee_response_header_write (buffer *, tipidee_response_header const *, uint32_t) ;
 extern size_t tipidee_response_header_writeall (buffer *, tipidee_response_header const *, uint32_t, uint32_t, tain const *) ;
 extern size_t tipidee_response_header_writeall_G (buffer *, tipidee_response_header const *, uint32_t, uint32_t) ;
-#define tipidee_response_header_writeall_g(b, rhdr, rhdrn, options) tipidee_response_header_writeall(b, rhdr, rhdrn, (options), &STAMP)
+
+extern size_t tipidee_response_header_end (buffer *) ;
+
 
 extern size_t tipidee_response_header_writemerge (buffer *, tipidee_response_header const *, uint32_t, tipidee_headers const *, uint32_t, tain const *) ;
 extern size_t tipidee_response_header_writemerge_G (buffer *, tipidee_response_header const *, uint32_t, tipidee_headers const *, uint32_t) ;
-#define tipidee_response_header_writemerge_g(b, rhdr, rhdrn, hdr, options) tipidee_response_header_writemerge(b, rhdr, rhdrn, hdr, (options), &STAMP)
 
-size_t tipidee_response_file (buffer *, tipidee_rql const *, unsigned int, char const *, struct stat const *, char const *, tipidee_response_header const *, uint32_t, uint32_t, tain const *) ;
-size_t tipidee_response_file_G (buffer *, tipidee_rql const *, unsigned int, char const *, struct stat const *, char const *, tipidee_response_header const *, uint32_t, uint32_t) ;
-#define tipidee_response_file_g(b, rql, status, reason, st, ct, rhdr, rhdrn, options) tipidee_response_file(b, rql, status, reason, st, ct, rhdr, rhdrn, (options), &STAMP)
+size_t tipidee_response_file (buffer *, tipidee_rql const *, unsigned int, char const *, struct stat const *, uint64_t, char const *, tipidee_response_header const *, uint32_t, uint32_t, tain const *) ;
+size_t tipidee_response_file_G (buffer *, tipidee_rql const *, unsigned int, char const *, struct stat const *, uint64_t, char const *, tipidee_response_header const *, uint32_t, uint32_t) ;
+
+size_t tipidee_response_partial (buffer *, tipidee_rql const *, struct stat const *, uint64_t, uint64_t, char const *, tipidee_response_header const *, uint32_t, uint32_t, tain const *) ;
+size_t tipidee_response_partial_G (buffer *, tipidee_rql const *, struct stat const *, uint64_t, uint64_t, char const *, tipidee_response_header const *, uint32_t, uint32_t) ;
 
-extern size_t tipidee_response_error_nofile (buffer *, tipidee_rql const *, unsigned int, char const *, char const *, tipidee_response_header const *, uint32_t, uint32_t, tain const *) ;
-extern size_t tipidee_response_error_nofile_G (buffer *, tipidee_rql const *, unsigned int, char const *, char const *, tipidee_response_header const *, uint32_t, uint32_t) ;
-#define tipidee_response_error_nofile_g(b, rql, status, reason, text, rhdr, rhdrn, options) tipidee_response_error_nofile(b, rql, status, reason, text, rhdr, rhdrn, (options), &STAMP)
+extern size_t tipidee_response_error_nofile (buffer *, tipidee_rql const *, unsigned int, char const *, char const *, tipidee_response_header const *, uint32_t, tipidee_response_header const *, uint32_t, uint32_t, tain const *) ;
+extern size_t tipidee_response_error_nofile_G (buffer *, tipidee_rql const *, unsigned int, char const *, char const *, tipidee_response_header const *, uint32_t, tipidee_response_header const *, uint32_t, uint32_t) ;
 
 extern int tipidee_response_header_preparebuiltin (tipidee_response_header *, uint32_t, char const *, size_t) ;
 
diff --git a/src/include/tipidee/util.h b/src/include/tipidee/util.h
index 7870a23..18eb2ce 100644
--- a/src/include/tipidee/util.h
+++ b/src/include/tipidee/util.h
@@ -3,9 +3,10 @@
 #ifndef TIPIDEE_UTIL_H
 #define TIPIDEE_UTIL_H
 
-#include <stddef.h>
+#include <sys/types.h>
 #include <stdint.h>
 
+#include <skalibs/uint64.h>
 #include <skalibs/buffer.h>
 #include <skalibs/tai.h>
 #include <skalibs/stralloc.h>
@@ -31,4 +32,6 @@ extern int tipidee_util_chunked_read (buffer *, stralloc *, size_t, tain const *
 
 extern int tipidee_util_httpdate (char const *, tain *) ;
 extern int tipidee_util_defaulttext (unsigned int, tipidee_defaulttext *) ;
+extern int tipidee_util_parse_range (char const *, off_t, uint64_t *, uint64_t *) ;
+
 #endif
diff --git a/src/libtipidee/deps-lib/tipidee b/src/libtipidee/deps-lib/tipidee
index 985be7e..33f9f2f 100644
--- a/src/libtipidee/deps-lib/tipidee
+++ b/src/libtipidee/deps-lib/tipidee
@@ -16,8 +16,8 @@ tipidee_headers_parse.o
 tipidee_headers_search.o
 tipidee_log_answer.o
 tipidee_log_exit.o
-tipidee_log_resource.o
 tipidee_log_request.o
+tipidee_log_resource.o
 tipidee_log_start.o
 tipidee_method.o
 tipidee_response_error_nofile.o
@@ -27,16 +27,21 @@ tipidee_response_file_G.o
 tipidee_response_header_date.o
 tipidee_response_header_date_G.o
 tipidee_response_header_date_fmt.o
+tipidee_response_header_end.o
 tipidee_response_header_lastmodified.o
 tipidee_response_header_preparebuiltin.o
+tipidee_response_header_write.o
 tipidee_response_header_writeall.o
 tipidee_response_header_writeall_G.o
 tipidee_response_header_writemerge.o
 tipidee_response_header_writemerge_G.o
+tipidee_response_partial.o
+tipidee_response_partial_G.o
 tipidee_response_status.o
 tipidee_rql_read.o
 tipidee_uri_parse.o
 tipidee_util_chunked_read.o
 tipidee_util_defaulttext.o
 tipidee_util_httpdate.o
+tipidee_util_parse_range.o
 -lskarnet
diff --git a/src/libtipidee/tipidee_response_error_nofile.c b/src/libtipidee/tipidee_response_error_nofile.c
index 8a7cd53..10da032 100644
--- a/src/libtipidee/tipidee_response_error_nofile.c
+++ b/src/libtipidee/tipidee_response_error_nofile.c
@@ -8,19 +8,21 @@
 #include <tipidee/method.h>
 #include <tipidee/response.h>
 
-size_t tipidee_response_error_nofile (buffer *b, tipidee_rql const *rql, unsigned int status, char const *reason, char const *text, tipidee_response_header const *rhdr, uint32_t rhdrn, uint32_t options, tain const *stamp)
+size_t tipidee_response_error_nofile (buffer *b, tipidee_rql const *rql, unsigned int status, char const *reason, char const *text, tipidee_response_header const *rhdr, uint32_t rhdrn, tipidee_response_header const *plus, uint32_t plusn, uint32_t options, tain const *stamp)
 {
   static char const txt1[] = "<html>\n<head><title>" ;
   static char const txt2[] = "</title></head>\n<body>\n<h1> " ;
   static char const txt3[] = " </h1>\n<p>\n" ;
   static char const txt4[] = "\n</p>\n</body>\n</html>\n" ;
   char fmt[SIZE_FMT] ;
+  tipidee_response_header v[2] = { { .key = "Content-Type", .value = "text/html; charset=UTF-8", .options = 0 }, { .key = "Content-Length", .value = fmt, .options = 0 } } ;
   size_t n = tipidee_response_status(b, rql, status, reason) ;
   n += tipidee_response_header_writeall(b, rhdr, rhdrn, options, stamp) ;
-  n += buffer_putsnoflush(b, "Content-Type: text/html; charset=UTF-8\r\n") ;
-  n += buffer_putsnoflush(b, "Content-Length: ") ;
-  n += buffer_putnoflush(b, fmt, size_fmt(fmt, text ? sizeof(txt1) + sizeof(txt2) + sizeof(txt3) + sizeof(txt4) - 4 + 2 * strlen(reason) + strlen(text) : 0)) ;
-  n += buffer_putnoflush(b, "\r\n\r\n", 4) ;
+  if (plusn) n += tipidee_response_header_write(b, plus, plusn) ;
+  fmt[size_fmt(fmt, text ? sizeof(txt1) + sizeof(txt2) + sizeof(txt3) + sizeof(txt4) - 4 + 2 * strlen(reason) + strlen(text) : 0)] = 0 ;
+  n += tipidee_response_header_write(b, v, 2) ;
+
+  n += buffer_putnoflush(b, "\r\n", 2) ;
   if (text && rql->m != TIPIDEE_METHOD_HEAD)
   {
     n += buffer_putsnoflush(b, txt1) ;
diff --git a/src/libtipidee/tipidee_response_error_nofile_G.c b/src/libtipidee/tipidee_response_error_nofile_G.c
index d7239cc..e6bdce5 100644
--- a/src/libtipidee/tipidee_response_error_nofile_G.c
+++ b/src/libtipidee/tipidee_response_error_nofile_G.c
@@ -4,9 +4,9 @@
 
 #include <tipidee/response.h>
 
-size_t tipidee_response_error_nofile_G (buffer *b, tipidee_rql const *rql, unsigned int status, char const *reason, char const *text, tipidee_response_header const *rhdr, uint32_t rhdrn, uint32_t options)
+size_t tipidee_response_error_nofile_G (buffer *b, tipidee_rql const *rql, unsigned int status, char const *reason, char const *text, tipidee_response_header const *rhdr, uint32_t rhdrn, tipidee_response_header const *plus, uint32_t plusn, uint32_t options)
 {
   tain wstamp ;
   tain_wallclock_read(&wstamp) ;
-  return tipidee_response_error_nofile(b, rql, status, reason, text, rhdr, rhdrn, options, &wstamp) ;
+  return tipidee_response_error_nofile(b, rql, status, reason, text, rhdr, rhdrn, plus, plusn, options, &wstamp) ;
 }
diff --git a/src/libtipidee/tipidee_response_file.c b/src/libtipidee/tipidee_response_file.c
index f2021ee..b64d086 100644
--- a/src/libtipidee/tipidee_response_file.c
+++ b/src/libtipidee/tipidee_response_file.c
@@ -2,18 +2,15 @@
 
 #include <stddef.h>
 
-#include <skalibs/types.h>
+#include <skalibs/uint64.h>
 #include <skalibs/buffer.h>
 
-#include <tipidee/conf.h>
-#include <tipidee/method.h>
-#include <tipidee/rql.h>
 #include <tipidee/response.h>
-#include <tipidee/util.h>
 
-size_t tipidee_response_file (buffer *b, tipidee_rql const *rql, unsigned int status, char const *reason, struct stat const *st, char const *ct, tipidee_response_header const *rhdr, uint32_t rhdrn, uint32_t options, tain const *stamp)
+size_t tipidee_response_file (buffer *b, tipidee_rql const *rql, unsigned int status, char const *reason, struct stat const *st, uint64_t cl, char const *ct, tipidee_response_header const *rhdr, uint32_t rhdrn, uint32_t options, tain const *stamp)
 {
   char fmt[128] ;
+  tipidee_response_header v[2] = { { .key = "Content-Type", .value = ct, .options = 0 }, { .key = "Content-Length", .value = fmt, .options = 0 } } ;
   size_t n = tipidee_response_status(b, rql, status, reason) ;
   n += tipidee_response_header_writeall(b, rhdr, rhdrn, options & 1, stamp) ;
   if (options & 2)
@@ -21,11 +18,7 @@ size_t tipidee_response_file (buffer *b, tipidee_rql const *rql, unsigned int st
     size_t l = tipidee_response_header_lastmodified(fmt, 128, st) ;
     if (l) n += buffer_putnoflush(b, fmt, l) ;
   }
-  n += buffer_putsnoflush(b, "Content-Type: ") ;
-  n += buffer_putsnoflush(b, ct) ;
-  n += buffer_putsnoflush(b, "\r\nContent-Length: ") ;
-  fmt[uint64_fmt(fmt, st->st_size)] = 0 ;
-  n += buffer_putsnoflush(b, fmt) ;
-  n += buffer_putnoflush(b, "\r\n\r\n", 4) ;
+  fmt[uint64_fmt(fmt, cl)] = 0 ;
+  n += tipidee_response_header_write(b, v, 2) ;
   return n ;
 }
diff --git a/src/libtipidee/tipidee_response_file_G.c b/src/libtipidee/tipidee_response_file_G.c
index 8c08c98..06af667 100644
--- a/src/libtipidee/tipidee_response_file_G.c
+++ b/src/libtipidee/tipidee_response_file_G.c
@@ -4,9 +4,9 @@
 
 #include <tipidee/response.h>
 
-size_t tipidee_response_file_G (buffer *b, tipidee_rql const *rql, unsigned int status, char const *reason, struct stat const *st, char const *ct, tipidee_response_header const *rhdr, uint32_t rhdrn, uint32_t options)
+size_t tipidee_response_file_G (buffer *b, tipidee_rql const *rql, unsigned int status, char const *reason, struct stat const *st, uint64_t cl, char const *ct, tipidee_response_header const *rhdr, uint32_t rhdrn, uint32_t options)
 {
   tain wstamp ;
   tain_wallclock_read(&wstamp) ;
-  return tipidee_response_file(b, rql, status, reason, st, ct, rhdr, rhdrn, options, &wstamp) ;
+  return tipidee_response_file(b, rql, status, reason, st, cl, ct, rhdr, rhdrn, options, &wstamp) ;
 }
diff --git a/src/libtipidee/tipidee_response_header_end.c b/src/libtipidee/tipidee_response_header_end.c
new file mode 100644
index 0000000..ddd8575
--- /dev/null
+++ b/src/libtipidee/tipidee_response_header_end.c
@@ -0,0 +1,10 @@
+/* ISC license. */
+
+#include <skalibs/buffer.h>
+
+#include <tipidee/response.h>
+
+size_t tipidee_response_header_end (buffer *b)
+{
+  return buffer_put(b, "\r\n", 2) ;
+}
diff --git a/src/libtipidee/tipidee_response_header_write.c b/src/libtipidee/tipidee_response_header_write.c
new file mode 100644
index 0000000..6c8edd9
--- /dev/null
+++ b/src/libtipidee/tipidee_response_header_write.c
@@ -0,0 +1,21 @@
+/* ISC license. */
+
+#include <stddef.h>
+
+#include <skalibs/buffer.h>
+
+#include <tipidee/response.h>
+
+size_t tipidee_response_header_write (buffer *b, tipidee_response_header const *hdr, uint32_t n)
+{
+  size_t m = 0 ;
+  for (uint32_t i = 0 ; i < n ; i++)
+  {
+    if (!hdr[i].value) continue ;
+    m += buffer_putsnoflush(b, hdr[i].key) ;
+    m += buffer_putnoflush(b, ": ", 2) ;
+    m += buffer_putsnoflush(b, hdr[i].value) ;
+    m += buffer_putnoflush(b, "\r\n", 2) ;
+  }
+  return m ;
+}
diff --git a/src/libtipidee/tipidee_response_header_writeall.c b/src/libtipidee/tipidee_response_header_writeall.c
index b94578d..36bc9bf 100644
--- a/src/libtipidee/tipidee_response_header_writeall.c
+++ b/src/libtipidee/tipidee_response_header_writeall.c
@@ -1,5 +1,7 @@
 /* ISC license. */
 
+#include <stddef.h>
+
 #include <skalibs/buffer.h>
 
 #include <tipidee/response.h>
@@ -9,13 +11,6 @@ size_t tipidee_response_header_writeall (buffer *b, tipidee_response_header cons
   char fmt[128] ;
   size_t m = buffer_putnoflush(b, fmt, tipidee_response_header_date(fmt, 128, stamp)) ;
   if (options & 1) m += buffer_putsnoflush(b, "Connection: close\r\n") ;
-  for (uint32_t i = 0 ; i < rhdrn ; i++)
-  {
-    if (!rhdr[i].value) continue ;
-    m += buffer_putsnoflush(b, rhdr[i].key) ;
-    m += buffer_putnoflush(b, ": ", 2) ;
-    m += buffer_putsnoflush(b, rhdr[i].value) ;
-    m += buffer_putnoflush(b, "\r\n", 2) ;
-  }
+  m += tipidee_response_header_write(b, rhdr, rhdrn) ;
   return m ;
 }
diff --git a/src/libtipidee/tipidee_response_partial.c b/src/libtipidee/tipidee_response_partial.c
new file mode 100644
index 0000000..4411896
--- /dev/null
+++ b/src/libtipidee/tipidee_response_partial.c
@@ -0,0 +1,29 @@
+/* ISC license. */
+
+#include <stddef.h>
+
+#include <skalibs/uint64.h>
+#include <skalibs/buffer.h>
+
+#include <tipidee/util.h>
+#include <tipidee/response.h>
+
+size_t tipidee_response_partial (buffer *b, tipidee_rql const *rql, struct stat const *st, uint64_t start, uint64_t len, char const *ct, tipidee_response_header const *rhdr, uint32_t rhdrn, uint32_t options, tain const *stamp)
+{
+  tipidee_defaulttext dt ;
+  size_t n ;
+  char fmt[UINT64_FMT] ;
+  if (!tipidee_util_defaulttext(206, &dt)) return 0 ;
+  n = tipidee_response_file(b, rql, 206, dt.reason, st, len, ct, rhdr, rhdrn, options, stamp) ;
+  if (len)
+  {
+    n += buffer_putsnoflush(b, "Content-Range: bytes ") ;
+    n += buffer_putnoflush(b, fmt, uint64_fmt(fmt, start)) ;
+    n += buffer_putnoflush(b, "-", 1) ;
+    n += buffer_putnoflush(b, fmt, uint64_fmt(fmt, start + len - 1)) ;
+    n += buffer_putnoflush(b, "/", 1) ;
+    n += buffer_putnoflush(b, fmt, uint64_fmt(fmt, st->st_size)) ;
+    n += buffer_putnoflush(b, "\r\n", 2) ;
+  }
+  return n ;
+}
diff --git a/src/libtipidee/tipidee_response_partial_G.c b/src/libtipidee/tipidee_response_partial_G.c
new file mode 100644
index 0000000..d9c5d78
--- /dev/null
+++ b/src/libtipidee/tipidee_response_partial_G.c
@@ -0,0 +1,12 @@
+/* ISC license. */
+
+#include <skalibs/tai.h>
+
+#include <tipidee/response.h>
+
+size_t tipidee_response_partial_G (buffer *b, tipidee_rql const *rql, struct stat const *st, uint64_t start, uint64_t len, char const *ct, tipidee_response_header const *rhdr, uint32_t rhdrn, uint32_t options)
+{
+  tain wstamp ;
+  tain_wallclock_read(&wstamp) ;
+  return tipidee_response_partial(b, rql, st, start, len, ct, rhdr, rhdrn, options, &wstamp) ;
+}
diff --git a/src/libtipidee/tipidee_util_parse_range.c b/src/libtipidee/tipidee_util_parse_range.c
new file mode 100644
index 0000000..e096fda
--- /dev/null
+++ b/src/libtipidee/tipidee_util_parse_range.c
@@ -0,0 +1,49 @@
+/* ISC license. */
+
+#include <string.h>
+
+#include <skalibs/uint64.h>
+
+#include <tipidee/util.h>
+
+int tipidee_util_parse_range (char const *s, off_t max, uint64_t *start, uint64_t *len)
+{
+  if (strncmp(s, "bytes=", 6)) return -1 ;
+  s += 6 ;
+  if (*s == '-')
+  {
+    uint64_t n ;
+    size_t m = uint64_scan(++s, &n) ;
+    if (!m) return -1 ;
+    s += m ;
+    if (*s && *s != ',') return -1 ;
+    if (n > max) return -1 ;
+    *start = max - n ;
+    *len = n ;
+    return 1 ;
+  }
+  else
+  {
+    uint64_t beg ;
+    uint64_t n ;
+    size_t m = uint64_scan(s, &beg) ;
+    if (!m) return -1 ;
+    s += m ;
+    if (*s++ != '-') return -1 ;
+    if (beg >= max) return -1 ;
+    if (!*s || *s == ',')
+    {
+      *start = beg ;
+      *len = max - beg ;
+      return 1 ;
+    }
+    m = uint64_scan(s, &n) ;
+    if (!m) return -1 ;
+    s += m ;
+    if (*s && *s != ',') return -1 ;
+    if (n >= max || n < beg) return -1 ;
+    *start = beg ;
+    *len = n + 1 - beg ;
+    return 1 ;
+  }
+}
diff --git a/src/tipideed/cgi.c b/src/tipideed/cgi.c
index 343f7af..14da139 100644
--- a/src/tipideed/cgi.c
+++ b/src/tipideed/cgi.c
@@ -25,13 +25,14 @@
 #include <tipidee/tipidee.h>
 #include "tipideed-internal.h"
 
+#define dienomem(rql, docroot) die500sys(rql, 111, (docroot), "stralloc_catb")
+
 static void addenv_ (tipidee_rql const *rql, char const *docroot, char const *k, char const *v, int slash)
 {
   if (!stralloc_cats(&g.sa, k)
    || !stralloc_catb(&g.sa, "=/", 1 + !!slash)
    || !stralloc_cats(&g.sa, v)
-   || !stralloc_0(&g.sa))
-    die500sys(rql, 111, docroot, "stralloc_catb") ;
+   || !stralloc_0(&g.sa)) dienomem(rql, docroot) ;
 }
 
 #define addenv(rql, d, k, v) addenv_(rql, d, k, (v), 0)
@@ -40,8 +41,24 @@ static void addenv_ (tipidee_rql const *rql, char const *docroot, char const *k,
 static void delenv (tipidee_rql const *rql, char const *docroot, char const *k)
 {
   if (!stralloc_cats(&g.sa, k)
-   || !stralloc_0(&g.sa))
-    die500sys(rql, 111, docroot, "stralloc_catb") ;
+   || !stralloc_0(&g.sa)) dienomem(rql, docroot) ;
+}
+
+static void addrequesturi (tipidee_rql const *rql, char const *docroot, char const *script, char const *infopath)
+{
+  if (!stralloc_cats(&g.sa, "REQUEST_URI=")
+   || !stralloc_cats(&g.sa, script)) dienomem(rql, docroot) ;
+  if (infopath)
+  {
+    if (!stralloc_catb(&g.sa, "/", 1)
+     || !stralloc_cats(&g.sa, infopath)) dienomem(rql, docroot) ;
+  }
+  if (rql->uri.query)
+  {
+    if (!stralloc_catb(&g.sa, "?", 1)
+     || !stralloc_cats(&g.sa, rql->uri.query)) dienomem(rql, docroot) ;
+  }
+  if (!stralloc_0(&g.sa)) dienomem(rql, docroot) ;
 }
 
 static inline void modify_env (tipidee_rql const *rql, char const *docroot, tipidee_headers const *hdr, size_t cl, char const *script, char const *infopath)
@@ -61,13 +78,14 @@ static inline void modify_env (tipidee_rql const *rql, char const *docroot, tipi
   if (rql->uri.query) addenv(rql, docroot, "QUERY_STRING", rql->uri.query) ;
   else delenv(rql, docroot, "QUERY_STRING") ;
   addenv(rql, docroot, "SCRIPT_NAME", script) ;
+  addrequesturi(rql, docroot, script, infopath) ;
   addenv(rql, docroot, "SERVER_NAME", rql->uri.host) ;
   {
     char proto[9] = "HTTP/1.1" ;
     if (!rql->http_minor) proto[7] = '0' ;
     addenv(rql, docroot, "SERVER_PROTOCOL", proto) ;
   }
-  
+
   for (size_t i = 0 ; i < hdr->n ; i++)
   {
     char const *key = hdr->buf + hdr->list[i].left ;
diff --git a/src/tipideed/deps-exe/tipideed b/src/tipideed/deps-exe/tipideed
index 8e5263e..ac5d4a3 100644
--- a/src/tipideed/deps-exe/tipideed
+++ b/src/tipideed/deps-exe/tipideed
@@ -1,8 +1,9 @@
 cgi.o
+errors.o
 harden.o
 options.o
 regular.o
-responses.o
+redirection.o
 send_file.o
 trace.o
 util.o
diff --git a/src/tipideed/responses.c b/src/tipideed/errors.c
index 6e32ea9..9b00f3b 100644
--- a/src/tipideed/responses.c
+++ b/src/tipideed/errors.c
@@ -21,22 +21,28 @@
 
 #include "tipideed-internal.h"
 
-void response_error_early (tipidee_rql const *rql, unsigned int status, char const *reason, char const *text, uint32_t options)
+void response_error_early_plus (tipidee_rql const *rql, unsigned int status, char const *reason, char const *text, tipidee_response_header const *v, uint32_t n, uint32_t options)
 {
   tain deadline ;
-  tipidee_response_error_nofile_G(buffer_1, rql, status, reason, text, g.rhdr, g.rhdrn, options & 1 || !g.cont) ;
+  tipidee_response_error_nofile_G(buffer_1, rql, status, reason, text, g.rhdr, g.rhdrn, v, n, options & 1 || !g.cont) ;
   tain_add_g(&deadline, &g.writetto) ;
   if (!buffer_timed_flush_g(buffer_1, &deadline))
     strerr_diefu1sys(111, "write to stdout") ;
 }
 
-void response_error_early_and_exit (tipidee_rql const *rql, unsigned int status, char const *reason, char const *text)
+void response_error_early_plus_and_exit (tipidee_rql const *rql, unsigned int status, char const *reason, char const *text, tipidee_response_header const *v, uint32_t n)
 {
-  response_error_early(rql, status, reason, text, 1) ;
+  response_error_early_plus(rql, status, reason, text, v, n, 1) ;
   log_and_exit(1) ;
 }
 
-void response_error (tipidee_rql const *rql, char const *docroot, unsigned int status, uint32_t options)
+void eexit_405 (tipidee_rql const *rql)
+{
+  static tipidee_response_header const allowpost = { .key = "Allow", .value = "GET, HEAD, POST", .options = 0 } ;
+  response_error_early_plus_and_exit(rql, 405, "Method Not Allowed", "Invalid method for the resource.", &allowpost, 1) ;
+}
+
+void response_error_plus (tipidee_rql const *rql, char const *docroot, unsigned int status, tipidee_response_header const *plus, uint32_t plusn, uint32_t options)
 {
   tain deadline ;
   tipidee_defaulttext dt ;
@@ -85,7 +91,9 @@ void response_error (tipidee_rql const *rql, char const *docroot, unsigned int s
         }
         else
         {
-          tipidee_response_file_G(buffer_1, rql, status, dt.reason, &st, tipidee_conf_get_content_type(&g.conf, g.sa.s + pos), g.rhdr, g.rhdrn, options) ;
+          tipidee_response_file_G(buffer_1, rql, status, dt.reason, &st, st.st_size, tipidee_conf_get_content_type(&g.conf, g.sa.s + pos), g.rhdr, g.rhdrn, options) ;
+          tipidee_response_header_write(buffer_1, plus, plusn) ;
+          tipidee_response_header_end(buffer_1) ;
           tipidee_log_answer(g.logv, rql, status, st.st_size) ;
           send_file(fd, st.st_size, g.sa.s + pos) ;
           fd_close(fd) ;
@@ -95,56 +103,38 @@ void response_error (tipidee_rql const *rql, char const *docroot, unsigned int s
     }
   }
 
-  tipidee_response_error_nofile_G(buffer_1, rql, status, dt.reason, dt.text, g.rhdr, g.rhdrn, options & 1 || !g.cont) ;
+  tipidee_response_error_nofile_G(buffer_1, rql, status, dt.reason, dt.text, g.rhdr, g.rhdrn, plus, plusn, options & 1 || !g.cont) ;
   tipidee_log_answer(g.logv, rql, status, 0) ;
   tain_add_g(&deadline, &g.writetto) ;
   if (!buffer_timed_flush_g(buffer_1, &deadline))
     strerr_diefu1sys(111, "write to stdout") ;
 }
 
-void response_error_and_exit (tipidee_rql const *rql, char const *docroot, unsigned int status)
+void response_error_plus_and_exit (tipidee_rql const *rql, char const *docroot, unsigned int status, tipidee_response_header const *plus, uint32_t plusn)
 {
-  response_error(rql, docroot, status, 1) ;
+  response_error_plus(rql, docroot, status, plus, plusn, 1) ;
   log_and_exit(0) ;
 }
 
-void response_error_and_die (tipidee_rql const *rql, int e, char const *docroot, unsigned int status, char const *const *v, unsigned int n, uint32_t options)
+void response_error_plus_and_die (tipidee_rql const *rql, int e, char const *docroot, unsigned int status, tipidee_response_header const *plus, uint32_t plusn, char const *const *v, unsigned int n, uint32_t options)
 {
   int serr = errno ;
-  response_error(rql, docroot, status, options | 1) ;
+  response_error_plus(rql, docroot, status, plus, plusn, options | 1) ;
   errno = serr ;
   if (options & 1) strerr_dievsys(e, v, n) ;
   else strerr_diev(e, v, n) ;
 }
 
-void exit_405_ (tipidee_rql const *rql, uint32_t options)
+void exit_405 (tipidee_rql const *rql, char const *docroot, uint32_t options)
 {
-  tain deadline ;
-  tipidee_response_status(buffer_1, rql, 405, "Method Not Allowed") ;
-  tipidee_response_header_writeall_G(buffer_1, g.rhdr, g.rhdrn, 1) ;
-  buffer_putsnoflush(buffer_1, "Allow: GET, HEAD") ;
-  if (options & 1) buffer_putsnoflush(buffer_1, ", POST") ;
-  buffer_putnoflush(buffer_1, "\r\n\r\n", 4) ;
-  if (!(options & 2)) tipidee_log_answer(g.logv, rql, 405, 0) ;
-  tain_add_g(&deadline, &g.writetto) ;
-  if (!buffer_timed_flush_g(buffer_1, &deadline))
-    strerr_diefu1sys(111, "write to stdout") ;
-  log_and_exit(0) ;
+  tipidee_response_header hd = { .key = "Allow", .value = options & 1 ? "GET, HEAD, POST" : "GET, HEAD", .options = 0 } ;
+  response_error_plus_and_exit(rql, docroot, 405, &hd, 1) ;
 }
 
-void respond_30x (tipidee_rql const *rql, tipidee_redirection const *rd)
+void respond_416 (tipidee_rql const *rql, char const *docroot, uint64_t size)
 {
-  static unsigned int const status[4] = { 307, 308, 302, 301 } ;
-  static char const *const reason[4] = { "Temporary Redirect", "Permanent Redirect", "Found", "Moved Permanently" } ;
-  tain deadline ;
-  tipidee_response_status(buffer_1, rql, status[rd->type], reason[rd->type]) ;
-  tipidee_response_header_writeall_G(buffer_1, g.rhdr, g.rhdrn, 0) ;
-  buffer_putsnoflush(buffer_1, "Content-Length: 0\r\nLocation: ") ;
-  buffer_putsnoflush(buffer_1, rd->location) ;
-  if (rd->sub) buffer_putsnoflush(buffer_1, rd->sub) ;
-  buffer_putnoflush(buffer_1, "\r\n\r\n", 4) ;
-  tipidee_log_answer(g.logv, rql, status[rd->type], 0) ;
-  tain_add_g(&deadline, &g.writetto) ;
-  if (!buffer_timed_flush_g(buffer_1, &deadline))
-    strerr_diefu1sys(111, "write to stdout") ;
+  char buf[8 + UINT64_FMT] = "bytes */" ;
+  tipidee_response_header cr = { .key = "Content-Range", .value = buf, .options = 0 } ;
+  buf[8 + uint64_fmt(buf + 8, size)] = 0 ;
+  response_error_plus(rql, docroot, 416, &cr, 1, 0) ;
 }
diff --git a/src/tipideed/redirection.c b/src/tipideed/redirection.c
new file mode 100644
index 0000000..e525e66
--- /dev/null
+++ b/src/tipideed/redirection.c
@@ -0,0 +1,29 @@
+/* ISC license. */
+
+#include <skalibs/buffer.h>
+#include <skalibs/strerr.h>
+#include <skalibs/tai.h>
+#include <skalibs/unix-timed.h>
+
+#include <tipidee/log.h>
+#include <tipidee/util.h>
+#include <tipidee/response.h>
+#include "tipideed-internal.h"
+
+void respond_30x (tipidee_rql const *rql, tipidee_redirection const *rd)
+{
+  static unsigned int const status[4] = { 307, 308, 302, 301 } ;
+  tipidee_defaulttext dt ;
+  tain deadline ;
+  tipidee_util_defaulttext(status[rd->type], &dt) ;
+  tipidee_response_status(buffer_1, rql, status[rd->type], dt.reason) ;
+  tipidee_response_header_writeall_G(buffer_1, g.rhdr, g.rhdrn, 0) ;
+  buffer_putsnoflush(buffer_1, "Content-Length: 0\r\nLocation: ") ;
+  buffer_putsnoflush(buffer_1, rd->location) ;
+  if (rd->sub) buffer_putsnoflush(buffer_1, rd->sub) ;
+  buffer_putnoflush(buffer_1, "\r\n\r\n", 4) ;
+  tipidee_log_answer(g.logv, rql, status[rd->type], 0) ;
+  tain_add_g(&deadline, &g.writetto) ;
+  if (!buffer_timed_flush_g(buffer_1, &deadline))
+    strerr_diefu1sys(111, "write to stdout") ;
+}
diff --git a/src/tipideed/regular.c b/src/tipideed/regular.c
index 67fba35..3d82750 100644
--- a/src/tipideed/regular.c
+++ b/src/tipideed/regular.c
@@ -22,7 +22,8 @@ int respond_regular (tipidee_rql const *rql, char const *docroot, char const *fn
   if (rql->m == TIPIDEE_METHOD_HEAD)
   {
     tain deadline ;
-    tipidee_response_file_G(buffer_1, rql, 200, "OK", st, ra->content_type, g.rhdr, g.rhdrn, 2 | !g.cont) ;
+    tipidee_response_file_G(buffer_1, rql, 200, "OK", st, st->st_size, ra->content_type, g.rhdr, g.rhdrn, 2 | !g.cont) ;
+    tipidee_response_header_end(buffer_1) ;
     tipidee_log_answer(g.logv, rql, 200, st->st_size) ;
     tain_add_g(&deadline, &g.writetto) ;
     if (!buffer_timed_flush_g(buffer_1, &deadline))
@@ -40,7 +41,8 @@ int respond_regular (tipidee_rql const *rql, char const *docroot, char const *fn
       }
       else die500sys(rql, 111, docroot, "open ", fn) ;
     }
-    tipidee_response_file_G(buffer_1, rql, 200, "OK", st, ra->content_type, g.rhdr, g.rhdrn, 2 | !g.cont) ;
+    tipidee_response_file_G(buffer_1, rql, 200, "OK", st, st->st_size, ra->content_type, g.rhdr, g.rhdrn, 2 | !g.cont) ;
+    tipidee_response_header_end(buffer_1) ;
     tipidee_log_answer(g.logv, rql, 200, st->st_size) ;
     send_file(fd, st->st_size, fn) ;
     fd_close(fd) ;
@@ -58,10 +60,30 @@ int respond_304 (tipidee_rql const *rql, char const *fn, struct stat const *st)
     size_t l = tipidee_response_header_lastmodified(fmt, 128, st) ;
     if (l) buffer_putnoflush(buffer_1, fmt, l) ;
   }
-  buffer_putnoflush(buffer_1, "\r\n", 2) ;
+  tipidee_response_header_end(buffer_1) ;
   tipidee_log_answer(g.logv, rql, 304, 0) ;
   tain_add_g(&deadline, &g.writetto) ;
   if (!buffer_timed_flush_g(buffer_1, &deadline))
     strerr_diefu1sys(111, "write to stdout") ;
   return 0 ;
 }
+
+int respond_partial (tipidee_rql const *rql, char const *docroot, char const *fn, struct stat const *st, uint64_t start, uint64_t len, tipidee_resattr const *ra)
+{
+  int fd = open_read(fn) ;
+  if (fd == -1)
+  {
+    if (errno == EACCES)
+    {
+      respond_403(rql, docroot) ;
+      return 0 ;
+    }
+    else die500sys(rql, 111, docroot, "open ", fn) ;
+  }
+  tipidee_response_partial_G(buffer_1, rql, st, start, len, ra->content_type, g.rhdr, g.rhdrn, 2 | !g.cont) ;
+  tipidee_response_header_end(buffer_1) ;
+  tipidee_log_answer(g.logv, rql, 206, len) ;
+  send_file_range(fd, start, len, fn) ;
+  fd_close(fd) ;
+  return 0 ;
+}
diff --git a/src/tipideed/send_file.c b/src/tipideed/send_file.c
index 6d97167..bcbd1c7 100644
--- a/src/tipideed/send_file.c
+++ b/src/tipideed/send_file.c
@@ -2,6 +2,66 @@
 
 #include <skalibs/sysdeps.h>
 
+#ifdef SKALIBS_HASSENDFILE
+
+#include <sys/types.h>
+#include <sys/sendfile.h>
+#include <limits.h>
+
+#include <skalibs/uint64.h>
+#include <skalibs/strerr.h>
+#include <skalibs/tai.h>
+#include <skalibs/unix-timed.h>
+
+#include "tipideed-internal.h"
+
+void init_splice_pipe (void)
+{
+}
+
+struct sendfile_s
+{
+  int fd ;
+  off_t pos ;  
+  uint64_t n ;
+} ;
+
+static int s_getfd (void *p)
+{
+  (void)p ;
+  return 1 ;
+}
+
+static int s_isnonempty (void *p)
+{
+  struct sendfile_s *sf = p ;
+  return !!sf->n ;
+}
+
+static int s_flush (void *p)
+{
+  struct sendfile_s *sf = p ;
+  while (sf->n)
+  {
+    ssize_t r = sendfile(1, sf->fd, &sf->pos, sf->n > SSIZE_MAX ? SSIZE_MAX : sf->n) ;
+    if (r == -1) return 0 ;
+    sf->n -= r ;
+  }
+  return 1 ;
+}
+
+void send_file_range (int fd, uint64_t offset, uint64_t n, char const *fn)
+{
+  struct sendfile_s sf = { .pos = offset, .n = n, .fd = fd } ;
+  tain deadline ;
+  tain_add_g(&deadline, &g.writetto) ;
+  if (!buffer_timed_flush_g(buffer_1, &deadline))
+    strerr_diefu2sys(111, "write", " to stdout") ;
+  if (!timed_flush_g(&sf, &s_getfd, &s_isnonempty, &s_flush, &deadline))
+    strerr_diefu3sys(111, "sendfile ", fn, " to stdout") ;
+}
+
+#else
 #ifdef SKALIBS_HASSPLICE
 
 #include <skalibs/nonposix.h>
@@ -10,7 +70,9 @@
 #include <stdint.h>
 #include <unistd.h>
 
+#include <skalibs/uint64.h>
 #include <skalibs/strerr.h>
+#include <skalibs/tai.h>
 #include <skalibs/djbunix.h>
 #include <skalibs/unix-timed.h>
 
@@ -53,7 +115,7 @@ static int flush (void *b)
   return 1 ;
 }
 
-void send_file (int fd, uint64_t n, char const *fn)
+void send_file_range (int fd, uint64_t offset, uint64_t n, char const *fn)
 {
   tain deadline ;
   struct spliceinfo_s si = { .last = 0 } ;
@@ -62,7 +124,7 @@ void send_file (int fd, uint64_t n, char const *fn)
     strerr_diefu2sys(111, "write", " to stdout") ;
   while (n)
   {
-    si.n = splice(fd, 0, g.p[1], 0, n, 0) ;
+    si.n = splice(fd, &offset, g.p[1], 0, n, 0) ;
     if (si.n == -1) strerr_diefu2sys(111, "read from ", fn) ;
     else if (!si.n) strerr_diefu3x(111, "serve ", fn, ": file was truncated") ;
     else if (si.n > n)
@@ -81,7 +143,10 @@ void send_file (int fd, uint64_t n, char const *fn)
 #else
 
 #include <sys/uio.h>
+#include <unistd.h>
+#include <stdint.h>
 
+#include <skalibs/uint64.h>
 #include <skalibs/allreadwrite.h>
 #include <skalibs/buffer.h>
 #include <skalibs/strerr.h>
@@ -94,12 +159,14 @@ void init_splice_pipe (void)
 {
 }
 
-void send_file (int fd, uint64_t n, char const *fn)
+void send_file_range (int fd, uint64_t offset, uint64_t n, char const *fn)
 {
   tain deadline ;
   struct iovec v[2] ;
   ssize_t r ;
   if (!n) goto flushit ;  /* I know, I know, but do-while SUCKS */
+  if (offset && lseek(fd, offset, SEEK_SET) == -1)
+    strerr_diefu2sys(111, "lseek on ", fn) ;
  fillit:
   buffer_wpeek(buffer_1, v) ;
   r = allreadv(fd, v, 2) ;
@@ -120,3 +187,4 @@ void send_file (int fd, uint64_t n, char const *fn)
 }
 
 #endif
+#endif
diff --git a/src/tipideed/tipideed-internal.h b/src/tipideed/tipideed-internal.h
index 8631861..4b35efa 100644
--- a/src/tipideed/tipideed-internal.h
+++ b/src/tipideed/tipideed-internal.h
@@ -79,28 +79,33 @@ extern void tipideed_harden (unsigned int) ;
 
  /* Responses */
 
-extern void response_error_early (tipidee_rql const *, unsigned int, char const *, char const *, uint32_t) ;  /* set bit 0 for Connection: close */
-extern void response_error_early_and_exit (tipidee_rql const *, unsigned int, char const *, char const *) gccattr_noreturn ;
-extern void exit_405_ (tipidee_rql const *, uint32_t) gccattr_noreturn ;  /* set bit 0 for Allow: POST, bit 1 for preexit */
+#define response_error_early(rql, status, reason, text, options) response_error_early_plus(rql, status, reason, text, 0, 0, options)
+extern void response_error_early_plus (tipidee_rql const *, unsigned int, char const *, char const *, tipidee_response_header const *, uint32_t, uint32_t) ;
+#define response_error_early_and_exit(rql, status, reason, text) response_error_early_plus_and_exit(rql, status, reason, (text), 0, 0)
+extern void response_error_early_plus_and_exit (tipidee_rql const *, unsigned int, char const *, char const *, tipidee_response_header const *, uint32_t) gccattr_noreturn ;
+extern void eexit_405 (tipidee_rql const *) gccattr_noreturn ;
 
 #define eexit_400(r, s) response_error_early_and_exit(r, 400, "Bad Request", s)
-#define eexit_405(r) exit_405_((r), 3)
 #define eexit_408(r) response_error_early_and_exit((r), 408, "Request Timeout", 0)
 #define eexit_413(r, s) response_error_early_and_exit(r, 413, "Request Entity Too Large", s)
 #define eexit_501(r, s) response_error_early_and_exit(r, 501, "Not Implemented", s)
 
+#define response_error(rql, docroot, status, options) response_error_plus(rql, docroot, status, 0, 0, options)
+extern void response_error_plus (tipidee_rql const *, char const *, unsigned int, tipidee_response_header const *, uint32_t, uint32_t) ;  /* set bit 0 for Connection: close */
+#define response_error_and_exit(rql, docroot, status) response_error_plus_and_exit(rql, docroot, (status), 0, 0)
+extern void response_error_plus_and_exit (tipidee_rql const *, char const *, unsigned int, tipidee_response_header const *, uint32_t) gccattr_noreturn ;
+#define response_error_and_die(rql, e, docroot, status, v, n, options) response_error_plus_and_die(rql, e, docroot, status, 0, 0, v, n, options)
+extern void response_error_plus_and_die (tipidee_rql const *, int, char const *, unsigned int, tipidee_response_header const *, uint32_t, char const *const *, unsigned int, uint32_t) gccattr_noreturn ;  /* set bit 0 for diesys */
 
-extern void response_error (tipidee_rql const *, char const *, unsigned int, uint32_t) ;  /* set bit 0 for Connection: close */
-extern void response_error_and_exit (tipidee_rql const *, char const *, unsigned int) gccattr_noreturn ;
-extern void response_error_and_die (tipidee_rql const *, int, char const *, unsigned int, char const *const *, unsigned int, uint32_t) gccattr_noreturn ;  /* set bit 0 for diesys */
-
+extern void exit_405 (tipidee_rql const *, char const *, uint32_t) gccattr_noreturn ;
 #define exit_400(r, d) response_error_and_exit(r, (d), 400)
-#define exit_405(r) exit_405_((r), 0)
 #define exit_408(r, d) response_error_and_exit(r, (d), 408)
 #define exit_413(r, d) response_error_and_exit(r, (d), 413)
 #define exit_501(r, d) response_error_and_exit(r, (d), 501)
 
 extern void respond_30x (tipidee_rql const *, tipidee_redirection const *) ;
+extern void respond_416 (tipidee_rql const *, char const *, uint64_t) ;
+
 #define respond_403(r, d) response_error(r, (d), 403, 0)
 #define respond_404(r, d) response_error(r, (d), 404, 0)
 #define respond_414(r, d) response_error(r, (d), 414, 0)
@@ -126,12 +131,14 @@ extern int respond_options (tipidee_rql const *, uint32_t) ;
  /* send_file */
 
 extern void init_splice_pipe (void) ;
-extern void send_file (int, uint64_t, char const *) ;
+extern void send_file_range (int, uint64_t, uint64_t, char const *) ;
+#define send_file(fd, n, fn) send_file_range(fd, 0, n, fn)
 
 
  /* regular */
 
 extern int respond_regular (tipidee_rql const *, char const *, char const *, struct stat const *, tipidee_resattr const *) ;
+extern int respond_partial (tipidee_rql const *, char const *, char const *, struct stat const *, uint64_t, uint64_t, tipidee_resattr const *) ;
 extern int respond_304 (tipidee_rql const *, char const *, struct stat const *) ;
 
 
diff --git a/src/tipideed/tipideed.c b/src/tipideed/tipideed.c
index 8323db1..69280f6 100644
--- a/src/tipideed/tipideed.c
+++ b/src/tipideed/tipideed.c
@@ -11,6 +11,7 @@
 #include <skalibs/posixplz.h>
 #include <skalibs/env.h>
 #include <skalibs/uint16.h>
+#include <skalibs/uint64.h>
 #include <skalibs/types.h>
 #include <skalibs/bytestr.h>
 #include <skalibs/sgetopt.h>
@@ -286,7 +287,7 @@ static inline int serve (tipidee_rql *rql, char const *docroot, char *uribuf, ti
   if (!ra.flags & TIPIDEE_RA_FLAG_CGI)
   {
     if (infopath) { respond_404(rql, docroot) ; return 0 ; }
-    if (rql->m == TIPIDEE_METHOD_POST) exit_405(rql) ;
+    if (rql->m == TIPIDEE_METHOD_POST) exit_405(rql, docroot, 0) ;
   }
 
   if (rql->m == TIPIDEE_METHOD_OPTIONS)
@@ -306,6 +307,19 @@ static inline int serve (tipidee_rql *rql, char const *docroot, char *uribuf, ti
      && tain_less(&actual, &wanted))
       return respond_304(rql, fn, &st) ;
   }
+
+  if (rql->m == TIPIDEE_METHOD_GET)
+  {
+    infopath = tipidee_headers_search(hdr, "Range") ;
+    if (infopath)
+    {
+      uint64_t start, len ;
+      int r = tipidee_util_parse_range(infopath, st.st_size, &start, &len) ;
+      if (r > 0) return respond_partial(rql, docroot, fn, &st, start, len, &ra) ;
+      if (r < 0) { respond_416(rql, docroot, st.st_size) ; return 0 ; }
+    }
+  }
+
   return respond_regular(rql, docroot, fn, &st, &ra) ;
 }