Connection management

Reviewed By: javache

Differential Revision: D5171773

fbshipit-source-id: 6421739736f732e021e85474253ab0ddb3804b0a

React/DevSupport/RCTInspectorDevServerHelper.mm

@@ -0,0 +1,74 @@
+#import "RCTInspectorDevServerHelper.h"
+
+#if RCT_DEV
+
+#import <jschelpers/JSCWrapper.h>
+
+#import "RCTDefines.h"
+#import "RCTInspectorPackagerConnection.h"
+
+using namespace facebook::react;
+
+static NSString *getDebugServerHost(NSURL *bundleURL)
+{
+  NSString *host = [bundleURL host];
+  if (!host) {
+    host = @"localhost";
+  }
+
+  NSNumber *port = [bundleURL port];
+  if (!port) {
+    port = @8081; // Packager default port
+  }
+
+  // this is consistent with the Android implementation, where http:// is the
+  // hardcoded implicit scheme for the debug server. Note, packagerURL
+  // technically looks like it could handle schemes/protocols other than HTTP,
+  // so rather than force HTTP, leave it be for now, in case someone is relying
+  // on that ability when developing against iOS.
+  return [NSString stringWithFormat:@"%@:%@", host, port];
+}
+
+static NSURL *getInspectorDeviceUrl(NSURL *bundleURL)
+{
+  // TODO: t19163919: figure out if there's a good way to get a friendly device
+  // name for the end user
+  return [NSURL URLWithString:[NSString stringWithFormat:@"http://%@/inspector/device?name=%@",
+                                                        getDebugServerHost(bundleURL),
+                                                        @""]];
+}
+
+
+@implementation RCTInspectorDevServerHelper
+
+RCT_NOT_IMPLEMENTED(- (instancetype)init)
+
++ (void)connectForContext:(JSGlobalContextRef)context
+            withBundleURL:(NSURL *)bundleURL
+{
+  if (!isCustomJSCPtr(context)) {
+    return;
+  }
+
+  NSURL *inspectorURL = getInspectorDeviceUrl(bundleURL);
+
+  // Note, using a static dictionary isn't really the greatest design, but
+  // the packager connection does the same thing, so it's at least consistent.
+  // This is a static map that holds different inspector clients per the inspectorURL
+  static NSMutableDictionary<NSString *, RCTInspectorPackagerConnection *> *socketConnections = nil;
+  if (socketConnections == nil) {
+    socketConnections = [NSMutableDictionary new];
+  }
+
+  NSString *key = [inspectorURL absoluteString];
+  RCTInspectorPackagerConnection *connection = socketConnections[key];
+  if (!connection) {
+    connection = [[RCTInspectorPackagerConnection alloc] initWithURL:inspectorURL];
+    socketConnections[key] = connection;
+    [connection connect];
+  }
+}
+
+@end
+
+#endif