Initial commit for Chrome metainstaller on Mac.

chrome/installer/mac/app/OmahaXMLRequest.m

+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#import <Foundation/Foundation.h>
+
+#include "OmahaXMLRequest.h"
+#include "SystemInfo.h"
+
+@implementation OmahaXMLRequest : NSObject
+
++ (NSXMLElement*)createElementWithName:(NSString*)name {
+  return [[NSXMLElement alloc] initWithName:name];
+}
+
++ (void)forElement:(NSXMLElement*)element
+      AddAttribute:(NSString*)attribute
+         WithValue:(NSString*)value {
+  [element
+      addAttribute:[NSXMLNode attributeWithName:attribute stringValue:value]];
+}
+
+// borisv@ indicated that the OS version, platform, appid, and version are the
+// user attributes that Omaha actually looks at. The other parameters are useful
+// for logging purposes but otherwise not directly used.
++ (NSXMLDocument*)createXMLRequestBody {
+  // NOTE: might be a good idea in the future to add a version# for this
+  // installer
+  NSString* protocol = @"3.0";
+
+  NSString* platform = @"mac";
+  NSString* operatingSystem = [SystemInfo getOSVersion];
+  NSString* architecture = [SystemInfo getArch];
+  NSString* plat_arch =
+      [NSString stringWithFormat:@"%@_%@", operatingSystem, architecture];
+
+  NSString* appid = @"com.google.Chrome";
+  NSString* version = @"0.0.0.0";
+  NSString* language = @"en-us";
+
+  NSXMLElement* root = [OmahaXMLRequest createElementWithName:@"request"];
+  [OmahaXMLRequest forElement:root AddAttribute:@"protocol" WithValue:protocol];
+
+  NSXMLElement* osChild = [OmahaXMLRequest createElementWithName:@"os"];
+  [OmahaXMLRequest forElement:osChild
+                 AddAttribute:@"platform"
+                    WithValue:platform];
+  [OmahaXMLRequest forElement:osChild
+                 AddAttribute:@"version"
+                    WithValue:operatingSystem];
+  [OmahaXMLRequest forElement:osChild
+                 AddAttribute:@"arch"
+                    WithValue:architecture];
+  [OmahaXMLRequest forElement:osChild AddAttribute:@"sp" WithValue:plat_arch];
+  [root addChild:osChild];
+
+  NSXMLElement* appChild = [OmahaXMLRequest createElementWithName:@"app"];
+  [OmahaXMLRequest forElement:appChild AddAttribute:@"appid" WithValue:appid];
+  [OmahaXMLRequest forElement:appChild
+                 AddAttribute:@"version"
+                    WithValue:version];
+  [OmahaXMLRequest forElement:appChild AddAttribute:@"lang" WithValue:language];
+  [root addChild:appChild];
+
+  NSXMLElement* updateChildChild =
+      [OmahaXMLRequest createElementWithName:@"updatecheck"];
+  [appChild addChild:updateChildChild];
+
+  NSXMLDocument* requestXMLDocument =
+      [[NSXMLDocument alloc] initWithRootElement:root];
+  return requestXMLDocument;
+}
+
+@end