realm-js/ReactNative/RealmReact.mm

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/* Copyright 2015 Realm Inc - All Rights Reserved
* Proprietary and Confidential
*/
extern "C" {
#import "RealmReact.h"
#import "Base/RCTBridge.h"
#import <GCDWebServers/GCDWebServers.h>
#import <RealmJS/RealmJS.h>
#import <objc/runtime.h>
#import <dlfcn.h>
@interface NSObject (RCTJavaScriptContext)
- (instancetype)initWithJSContext:(JSGlobalContextRef)context;
- (JSGlobalContextRef)ctx;
@end
JSGlobalContextRef RealmReactGetJSGlobalContextForExecutor(id executor, bool create) {
Ivar contextIvar = class_getInstanceVariable([executor class], "_context");
if (!contextIvar) {
return NULL;
}
id rctJSContext = contextIvar ? object_getIvar(executor, contextIvar) : nil;
if (!rctJSContext && create) {
Class RCTJavaScriptContext = NSClassFromString(@"RCTJavaScriptContext");
if (RCTJavaScriptContext) {
JSGlobalContextRef ctx = JSGlobalContextCreate(NULL);
rctJSContext = [[RCTJavaScriptContext alloc] initWithJSContext:ctx];
object_setIvar(executor, contextIvar, rctJSContext);
}
else {
NSLog(@"Failed to load RCTJavaScriptContext class");
}
}
return [rctJSContext ctx];
}
}
#import <RealmJS/RealmRPC.hpp>
#import <RealmJS/RJSUtil.hpp>
@interface RealmReact () <RCTBridgeModule>
@end
@implementation RealmReact
@synthesize bridge = _bridge;
+ (void)load {
void (*RCTRegisterModule)(Class) = (void (*)(Class))dlsym(RTLD_DEFAULT, "RCTRegisterModule");
if (RCTRegisterModule) {
RCTRegisterModule(self);
}
else {
NSLog(@"Failed to load RCTRegisterModule symbol - %s", dlerror());
}
}
+ (NSString *)moduleName {
return @"Realm";
}
- (void)setBridge:(RCTBridge *)bridge {
_bridge = bridge;
static GCDWebServer *s_webServer;
static realm_js::RPCServer *rpcServer;
if (s_webServer) {
[s_webServer stop];
[s_webServer removeAllHandlers];
s_webServer = nil;
delete rpcServer;
}
// The executor could be a RCTWebSocketExecutor, in which case it won't have a JS context.
Ivar executorIvar = class_getInstanceVariable([bridge class], "_javaScriptExecutor");
id executor = object_getIvar(bridge, executorIvar);
if ([executor isMemberOfClass:NSClassFromString(@"RCTWebSocketExecutor")]) {
[GCDWebServer setLogLevel:3];
GCDWebServer *webServer = [[GCDWebServer alloc] init];
rpcServer = new realm_js::RPCServer();
// Add a handler to respond to POST requests on any URL
[webServer addDefaultHandlerForMethod:@"POST"
requestClass:[GCDWebServerDataRequest class]
processBlock:^GCDWebServerResponse *(GCDWebServerRequest* request) {
GCDWebServerResponse *response;
try {
// perform all realm ops on the main thread
__block NSData *responseData;
dispatch_sync(dispatch_get_main_queue(), ^{
realm_js::json args = realm_js::json::parse([[(GCDWebServerDataRequest *)request text] UTF8String]);
std::string responseText = rpcServer->perform_request(request.path.UTF8String, args).dump();
responseData = [NSData dataWithBytes:responseText.c_str() length:responseText.length()];
});
response = [[GCDWebServerDataResponse alloc] initWithData:responseData contentType:@"application/json"];
}
catch(std::exception &ex) {
NSLog(@"Invalid RPC request - %@", [(GCDWebServerDataRequest *)request text]);
response = [GCDWebServerErrorResponse responseWithClientError:kGCDWebServerHTTPStatusCode_UnprocessableEntity
underlyingError:nil
message:@"Invalid RPC request"];
}
[response setValue:@"http://localhost:8081" forAdditionalHeader:@"Access-Control-Allow-Origin"];
return response;
}];
[webServer startWithPort:8082 bonjourName:nil];
s_webServer = webServer;
return;
}
[executor executeBlockOnJavaScriptQueue:^{
JSGlobalContextRef ctx = RealmReactGetJSGlobalContextForExecutor(executor, true);
RJSInitializeInContext(ctx);
}];
}
@end