[core] consolidate dynamic handler response parse

- consolidate dynamic handler HTTP response parsing code
- reduce string copies for CGI, FastCGI, SCGI, proxy response headers
- let read() signal EOF or EAGAIN instead of ioctl FIONREAD 0-data-ready

1 files changed, 18 insertions, 1 deletions

diff --git a/src/response.h b/src/response.h
index 0fc8bfcd..3d20eb1e 100644
--- a/src/response.h
+++ b/src/response.h
@@ -20,14 +20,31 @@ typedef struct http_cgi_opts_t {
   buffer *strip_request_uri;
 } http_cgi_opts;
 
+enum {
+  BACKEND_UNSET = 0,
+  BACKEND_PROXY,
+  BACKEND_CGI,
+  BACKEND_FASTCGI,
+  BACKEND_SCGI
+};
+
+typedef struct http_response_opts_t {
+  int backend;
+  int authorizer;
+  unsigned short local_redir;
+  unsigned short xsendfile_allow;
+  array *xsendfile_docroot;
+} http_response_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_parse_headers(server *srv, connection *con, http_response_opts *opts, buffer *hdrs);
+handler_t http_response_read(server *srv, connection *con, http_response_opts *opts, buffer *b, int fd, int *fde_ndx);
 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);
 void http_response_send_file (server *srv, connection *con, buffer *path);
-void http_response_xsendfile (server *srv, connection *con, buffer *path, const array *xdocroot);
 void http_response_backend_done (server *srv, connection *con);
 void http_response_backend_error (server *srv, connection *con);