Proxy: escape explicit space in URI in default cache key.
If the flag space_in_uri is set, the URI in HTTP upstream request is escaped to
convert space to %20. However this flag is not checked while creating the
default cache key. This leads to different cache keys for requests
'/foo bar' and '/foo%20bar', while the upstream requests are identical.
Additionally, the change fixes background cache updates when the client URI
contains unescaped space. Default cache key in a subrequest is always based on
escaped URI, while the main request may not escape it. As a result, background
cache update subrequest may update a different cache entry.
diff --git a/src/http/modules/ngx_http_proxy_module.c b/src/http/modules/ngx_http_proxy_module.c
index 6bbbfae..efb4bed 100644
--- a/src/http/modules/ngx_http_proxy_module.c
+++ b/src/http/modules/ngx_http_proxy_module.c
@@ -1095,7 +1095,7 @@
loc_len = (r->valid_location && ctx->vars.uri.len) ? plcf->location.len : 0;
- if (r->quoted_uri || r->internal) {
+ if (r->quoted_uri || r->space_in_uri || r->internal) {
escape = 2 * ngx_escape_uri(NULL, r->uri.data + loc_len,
r->uri.len - loc_len, NGX_ESCAPE_URI);
} else {
