decouples event name from JSValue-backed block event handler

this is accomplished by MD5-hashing event names to correspond to the block values

Author: pcperini

SocketIO.xcodeproj/project.xcworkspace/xcshareddata/SocketIO.xccheckout

@@ -14,7 +14,7 @@
 		<string>https://github.com/MegaBits/SIOSocket.git</string>
 	</dict>
 	<key>IDESourceControlProjectPath</key>
-	<string>SocketIO.xcodeproj/project.xcworkspace</string>
+	<string>SocketIO.xcodeproj</string>
 	<key>IDESourceControlProjectRelativeInstallPathDictionary</key>
 	<dict>
 		<key>0E77FB9618B0A7E05C2EE27348151B7941044E77</key>

SocketIO/SocketIO.m

@@ -123,6 +123,23 @@ - (void)testEmitMultiWord {
     [self waitForExpectationsWithTimeout: 10 handler: nil];
 }
 
+- (void)testEmitMultiWordWithCharacters {
+    XCTestExpectation *stringExpectation = [self expectationWithDescription: @"should emit multi word"];
+    [SIOSocket socketWithHost: @"http://localhost:3000" response: ^(SIOSocket *socket) {
+        XCTAssertNotNil(socket, @"socket could not connect to localhost");
+        [socket on: @"multi-word" callback: ^(SIOParameterArray *args) {
+            NSString *response = [args firstObject];
+            XCTAssert([response isEqualToString: @"word"], @"%@ != 'word'", response);
+            
+            [stringExpectation fulfill];
+        }];
+        
+        [socket emit: @"multi-word"];
+    }];
+    
+    [self waitForExpectationsWithTimeout: 10 handler: nil];
+}
+
 - (void)testBinaryData {
     XCTestExpectation *blobExpectation = [self expectationWithDescription: @"should send binary data as Blob"];
     [SIOSocket socketWithHost: @"http://localhost:3000" response: ^(SIOSocket *socket) {

SocketIO/Source/SIOSocket.m

@@ -9,11 +9,25 @@
 #import "SIOSocket.h"
 #import <JavaScriptCore/JavaScriptCore.h>
 #import "socket.io.js.h"
+#import <CommonCrypto/CommonCrypto.h>
 
 #ifdef __IPHONE_8_0
 #import <WebKit/WebKit.h>
 #endif
 
+static NSString *SIOMD5(NSString *string) {
+    const char *cstr = [string UTF8String];
+    unsigned char result[16];
+    CC_MD5(cstr, (unsigned int)strlen(cstr), result);
+    
+    return [NSString stringWithFormat: @"%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X",
+        result[0], result[1], result[2], result[3],
+        result[4], result[5], result[6], result[7],
+        result[8], result[9], result[10], result[11],
+        result[12], result[13], result[14], result[15]
+    ];
+};
+
 @interface SIOSocket ()
 
 @property UIWebView *javascriptWebView;
@@ -121,7 +135,7 @@ - (JSContext *)javascriptContext {
 
 // Event listeners
 - (void)on:(NSString *)event callback:(void (^)(SIOParameterArray *args))function {
-    NSString *eventID = [event stringByReplacingOccurrencesOfString: @" " withString: @"_"];
+    NSString *eventID = SIOMD5(event);
     self.javascriptContext[[NSString stringWithFormat: @"objc_%@", eventID]] = ^() {
         NSMutableArray *arguments = [NSMutableArray array];
         for (JSValue *object in [JSContext currentArguments]) {

socket_tester/app.js

@@ -117,4 +117,8 @@ server.on('connection', function(socket){
   socket.on('multi word', function() {
     socket.emit('multi word', 'word');
   });
+  
+  socket.on('multi-word', function() {
+    socket.emit('multi-word', 'word');
+  });
 });