consistent, shared code to create CGI env

consolidated from CGI, FastCGI, SCGI, SSI

Note: due to prior inconsistencies between the code in mod_cgi,
mod_fastcgi, mod_scgi, and mod_ssi, there are some minor behavior
changes.

CONTENT_LENGTH is now always set, even if 0
  (though CONTENT_LENGTH is never set for FASTCGI_AUTHORIZER)
PATH_INFO is created only if present, not if empty.
  (mod_fastcgi and mod_ssi previously set PATH_INFO="" (blank value))
PATH_TRANSLATED is now set if PATH_INFO is present
  (previously missing from mod_cgi and mod_ssi)

mod_ssi now sets DOCUMENT_ROOT to con->physical.basedir, like others
  (previously, mod_ssi set DOCUMENT_ROOT to con->physical.doc_root,
   which matched con->physical.basedir unless mod_alias changed basedir)
mod_ssi now sets REQUEST_URI to con->request.orig_uri, like others
  (previously, mod_ssi set REQUEST_URI to con->request.uri, which
   matched con->request.orig_uri except after redirects, error docs)

1 files changed, 10 insertions, 0 deletions

diff --git a/src/response.h b/src/response.h
index 3302f3e2..0fc8bfcd 100644
--- a/src/response.h
+++ b/src/response.h
@@ -13,6 +13,16 @@ int response_header_insert(server *srv, connection *con, const char *key, size_t
 int response_header_overwrite(server *srv, connection *con, const char *key, size_t keylen, const char *value, size_t vallen);
 int response_header_append(server *srv, connection *con, const char *key, size_t keylen, const char *value, size_t vallen);
 
+typedef struct http_cgi_opts_t {
+  int authorizer;
+  int break_scriptfilename_for_php;
+  buffer *docroot;
+  buffer *strip_request_uri;
+} http_cgi_opts;
+
+typedef int (*http_cgi_header_append_cb)(void *vdata, const char *k, size_t klen, const char *v, size_t vlen);
+int http_cgi_headers(server *srv, connection *con, http_cgi_opts *opts, http_cgi_header_append_cb cb, void *vdata);
+
 handler_t http_response_prepare(server *srv, connection *con);
 int http_response_redirect_to_directory(server *srv, connection *con);
 int http_response_handle_cachable(server *srv, connection *con, buffer * mtime);