vlib: use new filename format

vlib/net/http/download_nix.c.v

@@ -0,0 +1,52 @@
+// Copyright (c) 2019-2020 Alexander Medvednikov. All rights reserved.
+// Use of this source code is governed by an MIT license
+// that can be found in the LICENSE file.
+module http
+
+type downloadfn fn(written int)type download_finished_fn fn()
+/*
+struct DownloadStruct {
+mut:
+	stream  voidptr
+	written int
+	cb      downloadfn
+}
+*/
+fn download_cb(ptr voidptr, size, nmemb size_t, userp voidptr) {
+	/*
+	mut data := &DownloadStruct(userp)
+	written := C.fwrite(ptr, size, nmemb, data.stream)
+	data.written += written
+	data.cb(data.written)
+	//#data->cb(data->written); // TODO
+	return written
+*/
+}
+
+pub fn download_file_with_progress(url, out string, cb downloadfn, cb_finished fn()) {
+	/*
+	curl := C.curl_easy_init()
+	if isnil(curl) {
+		return
+	}
+	cout := out.str
+	fp := C.fopen(cout, 'wb')
+	C.curl_easy_setopt(curl, CURLOPT_URL, url.str)
+	C.curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, download_cb)
+	data := &DownloadStruct {
+		stream:fp
+		cb: cb
+	}
+	C.curl_easy_setopt(curl, CURLOPT_WRITEDATA, data)
+	mut d := 0.0
+	C.curl_easy_getinfo(curl, CURLINFO_CONTENT_LENGTH_DOWNLOAD, &d)
+	C.curl_easy_perform(curl)
+	C.curl_easy_cleanup(curl)
+	C.fclose(fp)
+	cb_finished()
+*/
+}
+
+fn empty() {
+}
+