http: initial windows schannel http support

thirdparty/vschannel/vschannel.h

@@ -0,0 +1,47 @@
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <windows.h> 
+#include <winsock.h>
+#include <wincrypt.h>
+#include <wintrust.h>
+#include <schannel.h>
+
+#define SECURITY_WIN32
+#include <security.h>
+#include <sspi.h>
+
+#define IO_BUFFER_SIZE  0x10000
+
+#define TLS_MAX_BUFSIZ      32768
+
+// Define here to be sure
+#define SP_PROT_TLS1_2_CLIENT 0x00000800
+
+
+INT request(CHAR *host, CHAR *req, CHAR *out);
+
+static SECURITY_STATUS create_credentials(PCredHandle phCreds);
+
+static INT connect_to_server(CHAR *host, INT port_number, SOCKET *pSocket);
+
+static SECURITY_STATUS perform_client_handshake(
+	SOCKET Socket, PCredHandle phCreds, CHAR *host,
+	CtxtHandle *phContext, SecBuffer *pExtraData);
+
+static SECURITY_STATUS client_handshake_loop(
+	SOCKET Socket, PCredHandle phCreds, CtxtHandle *phContext,
+	BOOL fDoInitialRead, SecBuffer *pExtraData);
+
+static SECURITY_STATUS https_make_request(
+	SOCKET Socket, PCredHandle phCreds,
+	CtxtHandle *phContext, CHAR *req, CHAR *out, int *length);
+	// CtxtHandle *phContext, CHAR *path);
+
+static DWORD verify_server_certificate(
+	PCCERT_CONTEXT  pServerCert, PSTR host, DWORD dwCertFlags);
+
+static LONG disconnect_from_server(
+	SOCKET Socket, PCredHandle phCreds, CtxtHandle *phContext);
+
+static void get_new_client_credentials(CredHandle *phCreds, CtxtHandle *phContext);

vlib/http/backend_win.v

@@ -0,0 +1,30 @@
+// Copyright (c) 2019 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
+
+import strings 
+
+#flag windows -I @VROOT/thirdparty/vschannel
+#flag -lws2_32 -lcrypt32
+ 
+#include "vschannel.c"
+
+
+fn init_module() {}
+
+fn ssl_do(method, host_name, path string) string { 
+	mut buff := malloc(10000)
+	
+	req := '$method $path HTTP/1.0\r\nUser-Agent: v\r\nAccept:*/*\r\n\r\n'
+	length := int(C.request(host_name.str, req.str, buff))
+	
+	if length == 0 {
+		return ''
+	}
+
+	resp := tos(buff, length)
+	
+	return resp
+}

vlib/http/download_win.v

@@ -4,11 +4,15 @@
 
 module http
 
+#flag -l Urlmon
+
+#include <Urlmon.h>
+
 fn download_file_with_progress(url, out string, cb, cb_finished voidptr) {
 }
 
 pub fn download_file(url, out string) {
-	C.URLDownloadToFileW(0, url.to_wide(), out.to_wide(), 0, 0)
+	C.URLDownloadToFile(0, url.to_wide(), out.to_wide(), 0, 0)
 	/*
 	if (res == S_OK) {
 	println('Download Ok')

vlib/http/http.v

@@ -109,6 +109,7 @@ pub fn (req &Request) do() Response {
 		panic('non https requests are not supported right now') 
 	}
 	s := ssl_do(req.typ, url.host, url.path)
+	// s := ssl_do(req.typ, url.host, url.path) 
 	first_header := s.all_before('\n') 
 	mut status_code := 0 
 	if first_header.contains('HTTP/') {