iOS client identifies itself via URL params

Recently, Crash started applying quotas for crash report uploads to protect the service and its client products from misbehaving product or product version. For the protection to be effective, products need to identify themselves during report upload via URL parameters. This new code makes iOS apps using Breakpad provide the parameters automatically.

src/client/mac/sender/uploader.mm

@@ -168,6 +168,10 @@ NSDictionary *readConfigurationData(const char *configFile) {
 
 // Records the uploaded crash ID to the log file.
 - (void)logUploadWithID:(const char *)uploadID;
+
+// Builds an URL parameter for a given dictionary key. Uses Uploader's parameters
+// to provide its value. Returns nil if no item is stored for the given key.
+- (NSURLQueryItem *)queryItemWithName:(NSString *)queryItemName forParamKey:(NSString *)key;
 @end
 
 @implementation Uploader
@@ -531,9 +535,42 @@ NSDictionary *readConfigurationData(const char *configFile) {
   [result release];
 }
 
+//=============================================================================
+- (NSURLQueryItem *)queryItemWithName:(NSString *)queryItemName forParamKey:(NSString *)key {
+  NSString *value = [parameters_ objectForKey:key];
+  NSString *escapedValue = [value stringByAddingPercentEncodingWithAllowedCharacters:
+                            [NSCharacterSet URLQueryAllowedCharacterSet]];
+  return [NSURLQueryItem queryItemWithName:queryItemName value:escapedValue];
+}
+
 //=============================================================================
 - (void)report {
   NSURL *url = [NSURL URLWithString:[parameters_ objectForKey:@BREAKPAD_URL]];
+
+  NSString *serverType = [parameters_ objectForKey:@BREAKPAD_SERVER_TYPE];
+  if ([serverType length] == 0 || [serverType isEqualToString:kGoogleServerType]) {
+    // when communicating to Crash @ Google, add URL params which identify the product
+    NSURLComponents *urlComponents = [NSURLComponents componentsWithURL:url
+                                               resolvingAgainstBaseURL:false];
+    NSMutableArray *queryItemsToAdd = [urlComponents.queryItems mutableCopyWithZone:nil];
+    if (queryItemsToAdd == nil) {
+      queryItemsToAdd = [[NSMutableArray alloc] init];
+    }
+
+    NSURLQueryItem *queryItemProduct = [self queryItemWithName:@"product"
+                                                   forParamKey:@BREAKPAD_PRODUCT];
+    NSURLQueryItem *queryItemVersion = [self queryItemWithName:@"version"
+                                                   forParamKey:@BREAKPAD_VERSION];
+    NSURLQueryItem *queryItemGuid = [self queryItemWithName:@"guid" forParamKey:@"guid"];
+
+    if (queryItemProduct != nil) [queryItemsToAdd addObject:queryItemProduct];
+    if (queryItemVersion != nil) [queryItemsToAdd addObject:queryItemVersion];
+    if (queryItemGuid != nil) [queryItemsToAdd addObject:queryItemGuid];
+
+    urlComponents.queryItems = queryItemsToAdd;
+    url = [urlComponents URL];
+  }
+
   HTTPMultipartUpload *upload = [[HTTPMultipartUpload alloc] initWithURL:url];
   NSMutableDictionary *uploadParameters = [NSMutableDictionary dictionary];