Adding upstream version 18.2.2.upstream/18.2.2

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 26 insertions, 0 deletions

diff --git a/examples/rgw/rgw-cache/nginx-lua-file.lua b/examples/rgw/rgw-cache/nginx-lua-file.lua
new file mode 100644
index 000000000..efaf42230
--- /dev/null
+++ b/examples/rgw/rgw-cache/nginx-lua-file.lua
@@ -0,0 +1,26 @@
+local check = ngx.req.get_headers()["AUTHORIZATION"]
+local uri =  ngx.var.request_uri
+local ngx_re = require "ngx.re"
+local hdrs = ngx.req.get_headers()
+--Take all signedheaders names, this for creating the X-Amz-Cache which is necessary to override range header to be able to readahead an object
+local res, err = ngx_re.split(check,"SignedHeaders=")
+local res2, err2 = ngx_re.split(res[2],",")
+local res3, err3 = ngx_re.split(res2[1],";")
+local t = {}
+local concathdrs = string.char(0x00)
+for i = 1, #res3, 1 do
+    if hdrs[res3[i]] ~= nil then
+--0xB1 is the separator between header name and value 
+        t[i] = res3[i] .. string.char(0xB1) ..  hdrs[res3[i]]
+--0xB2 is the separator between headers
+        concathdrs = concathdrs .. string.char(0xB2) .. t[i]
+    end
+end
+-- check if the authorization header is not empty
+if check ~= nil then
+    local xamzcache = concathdrs:sub(2)
+    xamzcache = xamzcache .. string.char(0xB2) .. "Authorization" .. string.char(0xB1) .. check
+        if xamzcache:find("aws4_request") ~= nil and uri ~= "/" and uri:find("?") == nil and hdrs["if-match"] == nil then
+            ngx.var.authvar = xamzcache
+        end
+end