External Go app request processing.

1 files changed, 69 insertions, 0 deletions

diff --git a/src/nginext/response.go b/src/nginext/response.go
new file mode 100644
index 00000000..dc864f6e
--- /dev/null
+++ b/src/nginext/response.go
@@ -0,0 +1,69 @@
+/*
+ * Copyright (C) Max Romanov
+ * Copyright (C) NGINX, Inc.
+ */
+
+package nginext
+
+/*
+#include "nxt_go_lib.h"
+*/
+import "C"
+
+import (
+	"fmt"
+	"net/http"
+	"os"
+)
+
+type response struct {
+	header     http.Header
+	headerSent bool
+	req        *http.Request
+	c_req      C.nxt_go_request_t
+}
+
+func new_response(c_req C.nxt_go_request_t, req *http.Request) *response {
+	resp := &response{
+		header: http.Header{},
+		req:    req,
+		c_req:  c_req,
+	}
+
+	return resp
+}
+
+func (r *response) Header() http.Header {
+	return r.header
+}
+
+func (r *response) Write(p []byte) (n int, err error) {
+	if !r.headerSent {
+		r.WriteHeader(http.StatusOK)
+	}
+
+	l := C.size_t(len(p))
+	b := getCBytes(p)
+	res := C.nxt_go_response_write(r.c_req, b, l)
+	C.free(b)
+	return int(res), nil
+}
+
+func (r *response) WriteHeader(code int) {
+	if r.headerSent {
+		// Note: explicitly using Stderr, as Stdout is our HTTP output.
+		fmt.Fprintf(os.Stderr, "CGI attempted to write header twice")
+		return
+	}
+	r.headerSent = true
+	fmt.Fprintf(r, "%s %d %s\r\n", r.req.Proto, code, http.StatusText(code))
+
+	// Set a default Content-Type
+	if _, hasType := r.header["Content-Type"]; !hasType {
+		r.header.Add("Content-Type", "text/html; charset=utf-8")
+	}
+
+	r.header.Write(r)
+
+	r.Write([]byte("\r\n"))
+}