Created http response class and added error checking

Limelight/Network/AppManager.m

@@ -9,6 +9,7 @@
 #import "AppManager.h"
 #import "CryptoManager.h"
 #import "Utils.h"
+#import "HttpResponse.h"
 
 @implementation AppManager {
     NSOperationQueue* _opQueue;
@@ -60,8 +61,9 @@
     }
     if (appImage == nil) {
         HttpManager* hMan = [[HttpManager alloc] initWithHost:_host.address uniqueId:_uniqueId deviceName:deviceName cert:_cert];
-        NSData* appAsset = [hMan executeRequestSynchronously:[hMan newAppAssetRequestWithAppId:app.appId]];
-        appImage = [UIImage imageWithData:appAsset];
+        HttpResponse* appAssetResp = [hMan executeRequestSynchronously:[hMan newAppAssetRequestWithAppId:app.appId]];
+        
+        appImage = [UIImage imageWithData:appAssetResp.responseData];
         app.appImage = appImage;
         if (appImage != nil) {
             @synchronized(_imageCache) {

Limelight/Network/DiscoveryManager.m

@@ -39,14 +39,14 @@
 
 - (void) discoverHost:(NSString *)hostAddress withCallback:(void (^)(Host *))callback {
     HttpManager* hMan = [[HttpManager alloc] initWithHost:hostAddress uniqueId:_uniqueId deviceName:deviceName cert:_cert];
-    NSData* serverInfoData = [hMan executeRequestSynchronously:[hMan newServerInfoRequest]];
+    HttpResponse* serverInfoResponse = [hMan executeRequestSynchronously:[hMan newServerInfoRequest]];
     
     Host* host = nil;
-    if ([[HttpManager getStatusStringFromXML:serverInfoData] isEqualToString:@"OK"]) {
+    if ([serverInfoResponse isStatusOk]) {
         DataManager* dataMan = [[DataManager alloc] init];
         host = [dataMan createHost];
         host.address = hostAddress;
-        [HttpManager populateHostFromXML:serverInfoData host:host];
+        [serverInfoResponse populateHost:host];
         if (![self addHostToDiscovery:host]) {
             [dataMan removeHost:host];
         }

Limelight/Network/DiscoveryWorker.m

@@ -43,18 +43,18 @@ static const float POLL_RATE = 2.0f; // Poll every 2 seconds
     BOOL receivedResponse = NO;
     if (!self.cancelled && _host.localAddress != nil) {
         HttpManager* hMan = [[HttpManager alloc] initWithHost:_host.localAddress uniqueId:_uniqueId deviceName:deviceName cert:_cert];
-        NSData* serverInfoData = [hMan executeRequestSynchronously:[hMan newServerInfoRequest]];
-        if ([[HttpManager getStatusStringFromXML:serverInfoData] isEqualToString:@"OK"]) {
-            [HttpManager populateHostFromXML:serverInfoData host:_host];
+        HttpResponse* serverInfoResp = [hMan executeRequestSynchronously:[hMan newServerInfoRequest]];
+        if ([serverInfoResp isStatusOk]) {
+            [serverInfoResp populateHost:_host];
             _host.address = _host.localAddress;
             receivedResponse = YES;
         }
     }
     if (!self.cancelled && !receivedResponse && _host.externalAddress != nil) {
         HttpManager* hMan = [[HttpManager alloc] initWithHost:_host.externalAddress uniqueId:_uniqueId deviceName:deviceName cert:_cert];
-        NSData* serverInfoData = [hMan executeRequestSynchronously:[hMan newServerInfoRequest]];
-        if ([[HttpManager getStatusStringFromXML:serverInfoData] isEqualToString:@"OK"]) {
-            [HttpManager populateHostFromXML:serverInfoData host:_host];
+        HttpResponse* serverInfoResp = [hMan executeRequestSynchronously:[hMan newServerInfoRequest]];
+        if ([serverInfoResp isStatusOk]) {
+            [serverInfoResp populateHost:_host];
             _host.address = _host.externalAddress;
             receivedResponse = YES;
         }
@@ -62,9 +62,9 @@ static const float POLL_RATE = 2.0f; // Poll every 2 seconds
     
     if (!self.cancelled && !receivedResponse && _host.address != nil) {
         HttpManager* hMan = [[HttpManager alloc] initWithHost:_host.address uniqueId:_uniqueId deviceName:deviceName cert:_cert];
-        NSData* serverInfoData = [hMan executeRequestSynchronously:[hMan newServerInfoRequest]];
-        if ([[HttpManager getStatusStringFromXML:serverInfoData] isEqualToString:@"OK"]) {
-            [HttpManager populateHostFromXML:serverInfoData host:_host];
+        HttpResponse* serverInfoResp = [hMan executeRequestSynchronously:[hMan newServerInfoRequest]];
+        if ([serverInfoResp isStatusOk]) {
+            [serverInfoResp populateHost:_host];
             receivedResponse = YES;
         }
     }

Limelight/Network/HttpManager.h

@@ -8,14 +8,10 @@
 
 #import <Foundation/Foundation.h>
 #import "Host.h"
+#import "HttpResponse.h"
 
 @interface HttpManager : NSObject <NSURLConnectionDelegate, NSURLConnectionDataDelegate>
 
-+ (NSArray*) getAppListFromXML:(NSData*)xml;
-+ (void) populateHostFromXML:(NSData*)xml host:(Host*)host;
-+ (NSString*) getStringFromXML:(NSData*)xml tag:(NSString*)tag;
-+ (NSString*) getStatusStringFromXML:(NSData*)xml;
-
 - (id) initWithHost:(NSString*) host uniqueId:(NSString*) uniqueId deviceName:(NSString*) deviceName cert:(NSData*) cert;
 - (NSURLRequest*) newPairRequest:(NSData*)salt;
 - (NSURLRequest*) newUnpairRequest;
@@ -29,7 +25,9 @@
 - (NSURLRequest*) newResumeRequestWithRiKey:(NSString*)riKey riKeyId:(int)riKeyId;
 - (NSURLRequest*) newQuitAppRequest;
 - (NSURLRequest*) newAppAssetRequestWithAppId:(NSString*)appId;
-- (NSData*) executeRequestSynchronously:(NSURLRequest*)request;
+- (HttpResponse*) executeRequestSynchronously:(NSURLRequest*)request;
+- (void) executeRequest:(NSURLRequest*)request;
+
 @end
 
 

Limelight/Network/HttpManager.m

@@ -26,207 +26,6 @@
 
 static const NSString* PORT = @"47984";
 
-+ (NSArray*) getAppListFromXML:(NSData*)xml {
-    xmlDocPtr docPtr = xmlParseMemory([xml bytes], (int)[xml length]);
-    
-    if (docPtr == NULL) {
-        NSLog(@"ERROR: An error occured trying to parse xml.");
-        return NULL;
-    }
-
-    xmlNodePtr node;
-    xmlNodePtr rootNode = node = xmlDocGetRootElement(docPtr);
-    
-    // Check root status_code
-    if (![HttpManager verifyStatus: rootNode]) {
-        NSLog(@"ERROR: Request returned with failure status");
-        xmlFreeDoc(docPtr);
-        return NULL;
-    }
-    
-    // Skip the root node
-    node = node->children;
-    
-    NSMutableArray* appList = [[NSMutableArray alloc] init];
-    
-    while (node != NULL) {
-        //NSLog(@"node: %s", node->name);
-        if (!xmlStrcmp(node->name, (const xmlChar*)"App")) {
-            xmlNodePtr appInfoNode = node->xmlChildrenNode;
-            NSString* appName;
-            NSString* appId;
-            BOOL appIsRunning = NO;
-            while (appInfoNode != NULL) {
-                //NSLog(@"appInfoNode: %s", appInfoNode->name);
-                if (!xmlStrcmp(appInfoNode->name, (const xmlChar*)"AppTitle")) {
-                    xmlChar* nodeVal = xmlNodeListGetString(docPtr, appInfoNode->xmlChildrenNode, 1);
-                    appName = [[NSString alloc] initWithCString:(const char*)nodeVal encoding:NSUTF8StringEncoding];
-                    xmlFree(nodeVal);
-                } else if (!xmlStrcmp(appInfoNode->name, (const xmlChar*)"ID")) {
-                    xmlChar* nodeVal = xmlNodeListGetString(docPtr, appInfoNode->xmlChildrenNode, 1);
-                    appId = [[NSString alloc] initWithCString:(const char*)nodeVal encoding:NSUTF8StringEncoding];
-                    xmlFree(nodeVal);
-                } else if (!xmlStrcmp(appInfoNode->name, (const xmlChar*)"IsRunning")) {
-                    xmlChar* nodeVal = xmlNodeListGetString(docPtr, appInfoNode->xmlChildrenNode, 1);
-                    appIsRunning = [[[NSString alloc] initWithCString:(const char*)nodeVal encoding:NSUTF8StringEncoding] isEqualToString:@"1"];
-                    xmlFree(nodeVal);
-                }
-                appInfoNode = appInfoNode->next;
-            }
-            App* app = [[App alloc] init];
-            app.appName = appName;
-            app.appId = appId;
-            app.isRunning = appIsRunning;
-            [appList addObject:app];
-        }
-        node = node->next;
-    }
-
-    xmlFreeDoc(docPtr);
-    
-    return appList;
-}
-
-+ (void) populateHostFromXML:(NSData*)xml host:(Host*)host {
-    xmlDocPtr docPtr = xmlParseMemory([xml bytes], (int)[xml length]);
-    
-    if (docPtr == NULL) {
-        NSLog(@"ERROR: An error occured trying to parse xml.");
-        return;
-    }
-
-    xmlNodePtr node;
-    xmlNodePtr rootNode = node = xmlDocGetRootElement(docPtr);
-    
-    // Check root status_code
-    if (![HttpManager verifyStatus: rootNode]) {
-        NSLog(@"ERROR: Request returned with failure status");
-        xmlFreeDoc(docPtr);
-        return;
-    }
-    
-    // Skip the root node
-    node = node->children;
-    
-    while (node != NULL) {
-        //NSLog(@"node: %s", node->name);
-        if (!xmlStrcmp(node->name, (const xmlChar*)"hostname")) {
-            xmlChar* nodeVal = xmlNodeListGetString(docPtr, node->xmlChildrenNode, 1);
-            host.name = [[NSString alloc] initWithCString:(const char*)nodeVal encoding:NSUTF8StringEncoding];
-            xmlFree(nodeVal);
-        } else if (!xmlStrcmp(node->name, (const xmlChar*)"ExternalIP")) {
-            xmlChar* nodeVal = xmlNodeListGetString(docPtr, node->xmlChildrenNode, 1);
-            host.externalAddress = [[NSString alloc] initWithCString:(const char*)nodeVal encoding:NSUTF8StringEncoding];
-            xmlFree(nodeVal);
-        } else if (!xmlStrcmp(node->name, (const xmlChar*)"LocalIP")) {
-            xmlChar* nodeVal = xmlNodeListGetString(docPtr, node->xmlChildrenNode, 1);
-            host.localAddress = [[NSString alloc] initWithCString:(const char*)nodeVal encoding:NSUTF8StringEncoding];
-            xmlFree(nodeVal);
-        } else if (!xmlStrcmp(node->name, (const xmlChar*)"uniqueid")) {
-            xmlChar* nodeVal = xmlNodeListGetString(docPtr, node->xmlChildrenNode, 1);
-            host.uuid = [[NSString alloc] initWithCString:(const char*)nodeVal encoding:NSUTF8StringEncoding];
-            xmlFree(nodeVal);
-        } else if (!xmlStrcmp(node->name, (const xmlChar*)"mac")) {
-            xmlChar* nodeVal = xmlNodeListGetString(docPtr, node->xmlChildrenNode, 1);
-            host.mac = [[NSString alloc] initWithCString:(const char*)nodeVal encoding:NSUTF8StringEncoding];
-            xmlFree(nodeVal);
-        } else if (!xmlStrcmp(node->name, (const xmlChar*)"PairStatus")) {
-            xmlChar* nodeVal = xmlNodeListGetString(docPtr, node->xmlChildrenNode, 1);
-            host.pairState = [[[NSString alloc] initWithCString:(const char*)nodeVal encoding:NSUTF8StringEncoding] isEqualToString:@"1"] ? PairStatePaired : PairStateUnpaired;
-            xmlFree(nodeVal);
-        }
-        
-        node = node->next;
-    }
-    
-    xmlFreeDoc(docPtr);
-}
-
-+ (NSString*) getStatusStringFromXML:(NSData*)xml {
-    xmlDocPtr docPtr = xmlParseMemory([xml bytes], (int)[xml length]);
-    
-    if (docPtr == NULL) {
-        NSLog(@"ERROR: An error occured trying to parse xml.");
-        return NULL;
-    }
-    
-    NSString* string;
-    xmlNodePtr rootNode = xmlDocGetRootElement(docPtr);
-    if (rootNode == NULL) {
-        NSLog(@"ERROR: No root XML element.");
-        xmlFreeDoc(docPtr);
-        return NULL;
-    }
-    
-    string = [HttpManager getStatusMessage: rootNode];
-    
-    xmlFreeDoc(docPtr);
-    
-    return string;
-}
-
-+ (NSString*) getStringFromXML:(NSData*)xml tag:(NSString*)tag {
-    xmlDocPtr docPtr = xmlParseMemory([xml bytes], (int)[xml length]);
-    
-    if (docPtr == NULL) {
-        NSLog(@"ERROR: An error occured trying to parse xml.");
-        return NULL;
-    }
-    NSString* value;
-    xmlNodePtr node;
-    xmlNodePtr rootNode = node = xmlDocGetRootElement(docPtr);
-    
-    // Check root status_code
-    if (![HttpManager verifyStatus: rootNode]) {
-        NSLog(@"ERROR: Request returned with failure status");
-        xmlFreeDoc(docPtr);
-        return NULL;
-    }
-    
-    // Skip the root node
-    node = node->children;
-    
-    while (node != NULL) {
-        //NSLog(@"node: %s", node->name);
-        if (!xmlStrcmp(node->name, (const xmlChar*)[tag UTF8String])) {
-            xmlChar* nodeVal = xmlNodeListGetString(docPtr, node->xmlChildrenNode, 1);
-            value = [[NSString alloc] initWithCString:(const char*)nodeVal encoding:NSUTF8StringEncoding];
-            xmlFree(nodeVal);
-        }
-        node = node->next;
-    }
-    //NSLog(@"xmlValue: %@", value);
-
-    xmlFreeDoc(docPtr);
-    
-    return value;
-}
-    
-+ (NSString*) getStatusMessage:(xmlNodePtr)docRoot {
-    xmlChar* statusMsgXml = xmlGetProp(docRoot, (const xmlChar*)"status_message");
-    NSString* statusMsg;
-    if (statusMsgXml != NULL) {
-        statusMsg = [NSString stringWithUTF8String:(const char*)statusMsgXml];
-        xmlFree(statusMsgXml);
-    }
-    else {
-        statusMsg = @"Server Error";
-    }
-
-    return statusMsg;
-}
-
-+ (bool) verifyStatus:(xmlNodePtr)docRoot {
-    xmlChar* statusStr = xmlGetProp(docRoot, (const xmlChar*)"status_code");
-    if (statusStr != NULL) {
-        int status = [[NSString stringWithUTF8String:(const char*)statusStr] intValue];
-        xmlFree(statusStr);
-        return status == 200;
-    }
-
-    return false;
-}
-
 + (NSData*) fixXmlVersion:(NSData*) xmlData {
     NSString* dataString = [[NSString alloc] initWithData:xmlData encoding:NSUTF8StringEncoding];
     NSString* xmlString = [dataString stringByReplacingOccurrencesOfString:@"UTF-16" withString:@"UTF-8" options:NSCaseInsensitiveSearch range:NSMakeRange(0, [dataString length])];
@@ -247,14 +46,14 @@ static const NSString* PORT = @"47984";
     return self;
 }
 
-- (NSData*) executeRequestSynchronously:(NSURLRequest*)request {
+- (HttpResponse*) executeRequestSynchronously:(NSURLRequest*)request {
     NSLog(@"Making Request: %@", request);
     [_respData setLength:0];
     dispatch_sync(dispatch_get_main_queue(), ^{
         [NSURLConnection connectionWithRequest:request delegate:self];
     });
     dispatch_semaphore_wait(_requestLock, DISPATCH_TIME_FOREVER);
-    return _requestResp;
+    return [HttpResponse responseWithData:_requestResp];
 }
 
 - (void) executeRequest:(NSURLRequest*)request {

Limelight/Network/HttpResponse.h

@@ -0,0 +1,26 @@
+//
+//  HttpResponse.h
+//  Limelight
+//
+//  Created by Diego Waxemberg on 1/30/15.
+//  Copyright (c) 2015 Limelight Stream. All rights reserved.
+//
+
+#import <Foundation/Foundation.h>
+#import "Host.h"
+
+@interface HttpResponse : NSObject
+
+@property (nonatomic) NSInteger statusCode;
+@property (nonatomic) NSString* statusMessage;
+@property (nonatomic) NSData* responseData;
+
++ (HttpResponse*) responseWithData:(NSData*)xml;
+
+- (NSString*) parseStringTag:(NSString*)tag;
+- (BOOL)parseIntTag:(NSString *)tag value:(NSInteger*)value;
+- (BOOL) isStatusOk;
+- (BOOL) populateHost:(Host*)host;
+- (NSArray*) getAppList;
+
+@end

Limelight/Network/HttpResponse.m

@@ -0,0 +1,222 @@
+//
+//  HttpResponse.m
+//  Limelight
+//
+//  Created by Diego Waxemberg on 1/30/15.
+//  Copyright (c) 2015 Limelight Stream. All rights reserved.
+//
+
+#import "HttpResponse.h"
+#import "App.h"
+#import <libxml2/libxml/xmlreader.h>
+
+@implementation HttpResponse
+
++ (HttpResponse*) responseWithData:(NSData*)xml {
+    HttpResponse* response = [[HttpResponse alloc] init];
+    response.responseData = xml;
+    
+    xmlDocPtr docPtr = xmlParseMemory([xml bytes], (int)[xml length]);
+    
+    if (docPtr == NULL) {
+        NSLog(@"ERROR: An error occured trying to parse xml.");
+        return response;
+    }
+    
+    xmlNodePtr rootNode = xmlDocGetRootElement(docPtr);
+    if (rootNode == NULL) {
+        NSLog(@"ERROR: No root XML element.");
+        xmlFreeDoc(docPtr);
+        return response;
+    }
+    
+    xmlChar* statusStr = xmlGetProp(rootNode, (const xmlChar*)"status_code");
+    if (statusStr != NULL) {
+        int status = [[NSString stringWithUTF8String:(const char*)statusStr] intValue];
+        xmlFree(statusStr);
+        response.statusCode = status;
+    }
+    
+    xmlChar* statusMsgXml = xmlGetProp(rootNode, (const xmlChar*)"status_message");
+    NSString* statusMsg;
+    if (statusMsgXml != NULL) {
+        statusMsg = [NSString stringWithUTF8String:(const char*)statusMsgXml];
+        xmlFree(statusMsgXml);
+    }
+    else {
+        statusMsg = @"Server Error";
+    }
+    response.statusMessage = statusMsg;
+    
+    
+    return response;
+}
+
+- (NSString*)parseStringTag:(NSString *)tag {
+    xmlDocPtr docPtr = xmlParseMemory([self.responseData bytes], (int)[self.responseData length]);
+    
+    if (docPtr == NULL) {
+        NSLog(@"ERROR: An error occured trying to parse xml.");
+        return nil;
+    }
+    
+    xmlNodePtr node = xmlDocGetRootElement(docPtr);
+    
+    // Check root status_code
+    if (![self isStatusOk]) {
+        NSLog(@"ERROR: Request returned with failure status");
+        xmlFreeDoc(docPtr);
+        return nil;
+    }
+    
+    // Skip the root node
+    node = node->children;
+   
+    NSString* value;
+    while (node != NULL) {
+        //NSLog(@"node: %s", node->name);
+        if (!xmlStrcmp(node->name, (const xmlChar*)[tag UTF8String])) {
+            xmlChar* nodeVal = xmlNodeListGetString(docPtr, node->xmlChildrenNode, 1);
+            value = [[NSString alloc] initWithCString:(const char*)nodeVal encoding:NSUTF8StringEncoding];
+            xmlFree(nodeVal);
+        }
+        node = node->next;
+    }
+    //NSLog(@"xmlValue: %@", value);
+    
+    xmlFreeDoc(docPtr);
+    return value;
+}
+
+- (BOOL)parseIntTag:(NSString *)tag value:(NSInteger*)value {
+    NSString* stringVal = [self parseStringTag:tag];
+    if (stringVal != nil) {
+        *value = [stringVal integerValue];
+        return true;
+    } else {
+        return false;
+    }
+}
+
+- (BOOL) isStatusOk {
+    return self.statusCode == 200;
+}
+
+- (BOOL) populateHost:(Host*)host {
+    xmlDocPtr docPtr = xmlParseMemory([self.responseData bytes], (int)[self.responseData length]);
+    
+    if (docPtr == NULL) {
+        NSLog(@"ERROR: An error occured trying to parse xml.");
+        return false;
+    }
+    
+    xmlNodePtr node = xmlDocGetRootElement(docPtr);
+    
+    // Check root status_code
+    if (![self isStatusOk]) {
+        NSLog(@"ERROR: Request returned with failure status");
+        xmlFreeDoc(docPtr);
+        return false;
+    }
+    
+    // Skip the root node
+    node = node->children;
+    
+    while (node != NULL) {
+        //NSLog(@"node: %s", node->name);
+        if (!xmlStrcmp(node->name, (const xmlChar*)"hostname")) {
+            xmlChar* nodeVal = xmlNodeListGetString(docPtr, node->xmlChildrenNode, 1);
+            host.name = [[NSString alloc] initWithCString:(const char*)nodeVal encoding:NSUTF8StringEncoding];
+            xmlFree(nodeVal);
+        } else if (!xmlStrcmp(node->name, (const xmlChar*)"ExternalIP")) {
+            xmlChar* nodeVal = xmlNodeListGetString(docPtr, node->xmlChildrenNode, 1);
+            host.externalAddress = [[NSString alloc] initWithCString:(const char*)nodeVal encoding:NSUTF8StringEncoding];
+            xmlFree(nodeVal);
+        } else if (!xmlStrcmp(node->name, (const xmlChar*)"LocalIP")) {
+            xmlChar* nodeVal = xmlNodeListGetString(docPtr, node->xmlChildrenNode, 1);
+            host.localAddress = [[NSString alloc] initWithCString:(const char*)nodeVal encoding:NSUTF8StringEncoding];
+            xmlFree(nodeVal);
+        } else if (!xmlStrcmp(node->name, (const xmlChar*)"uniqueid")) {
+            xmlChar* nodeVal = xmlNodeListGetString(docPtr, node->xmlChildrenNode, 1);
+            host.uuid = [[NSString alloc] initWithCString:(const char*)nodeVal encoding:NSUTF8StringEncoding];
+            xmlFree(nodeVal);
+        } else if (!xmlStrcmp(node->name, (const xmlChar*)"mac")) {
+            xmlChar* nodeVal = xmlNodeListGetString(docPtr, node->xmlChildrenNode, 1);
+            host.mac = [[NSString alloc] initWithCString:(const char*)nodeVal encoding:NSUTF8StringEncoding];
+            xmlFree(nodeVal);
+        } else if (!xmlStrcmp(node->name, (const xmlChar*)"PairStatus")) {
+            xmlChar* nodeVal = xmlNodeListGetString(docPtr, node->xmlChildrenNode, 1);
+            host.pairState = [[[NSString alloc] initWithCString:(const char*)nodeVal encoding:NSUTF8StringEncoding] isEqualToString:@"1"] ? PairStatePaired : PairStateUnpaired;
+            xmlFree(nodeVal);
+        }
+        
+        node = node->next;
+    }
+    
+    xmlFreeDoc(docPtr);
+    
+    return true;
+}
+
+- (NSArray*) getAppList {
+    xmlDocPtr docPtr = xmlParseMemory([self.responseData bytes], (int)[self.responseData length]);
+    
+    if (docPtr == NULL) {
+        NSLog(@"ERROR: An error occured trying to parse xml.");
+        return nil;
+    }
+    
+    xmlNodePtr node = xmlDocGetRootElement(docPtr);
+    
+    // Check root status_code
+    if (![self isStatusOk]) {
+        NSLog(@"ERROR: Request returned with failure status");
+        xmlFreeDoc(docPtr);
+        return nil;
+    }
+    
+    // Skip the root node
+    node = node->children;
+    
+    NSMutableArray* appList = [[NSMutableArray alloc] init];
+    
+    while (node != NULL) {
+        //NSLog(@"node: %s", node->name);
+        if (!xmlStrcmp(node->name, (const xmlChar*)"App")) {
+            xmlNodePtr appInfoNode = node->xmlChildrenNode;
+            NSString* appName;
+            NSString* appId;
+            BOOL appIsRunning = NO;
+            while (appInfoNode != NULL) {
+                //NSLog(@"appInfoNode: %s", appInfoNode->name);
+                if (!xmlStrcmp(appInfoNode->name, (const xmlChar*)"AppTitle")) {
+                    xmlChar* nodeVal = xmlNodeListGetString(docPtr, appInfoNode->xmlChildrenNode, 1);
+                    appName = [[NSString alloc] initWithCString:(const char*)nodeVal encoding:NSUTF8StringEncoding];
+                    xmlFree(nodeVal);
+                } else if (!xmlStrcmp(appInfoNode->name, (const xmlChar*)"ID")) {
+                    xmlChar* nodeVal = xmlNodeListGetString(docPtr, appInfoNode->xmlChildrenNode, 1);
+                    appId = [[NSString alloc] initWithCString:(const char*)nodeVal encoding:NSUTF8StringEncoding];
+                    xmlFree(nodeVal);
+                } else if (!xmlStrcmp(appInfoNode->name, (const xmlChar*)"IsRunning")) {
+                    xmlChar* nodeVal = xmlNodeListGetString(docPtr, appInfoNode->xmlChildrenNode, 1);
+                    appIsRunning = [[[NSString alloc] initWithCString:(const char*)nodeVal encoding:NSUTF8StringEncoding] isEqualToString:@"1"];
+                    xmlFree(nodeVal);
+                }
+                appInfoNode = appInfoNode->next;
+            }
+            App* app = [[App alloc] init];
+            app.appName = appName;
+            app.appId = appId;
+            app.isRunning = appIsRunning;
+            [appList addObject:app];
+        }
+        node = node->next;
+    }
+    
+    xmlFreeDoc(docPtr);
+    
+    return appList;
+}
+
+
+@end

Limelight/Network/PairManager.m

@@ -9,6 +9,7 @@
 #import "PairManager.h"
 #import "CryptoManager.h"
 #import "Utils.h"
+#import "HttpResponse.h"
 
 #include <dispatch/dispatch.h>
 
@@ -27,18 +28,19 @@
 }
 
 - (void) main {
-    NSData* serverInfo = [_httpManager executeRequestSynchronously:[_httpManager newServerInfoRequest]];
-    if (serverInfo == NULL) {
+    HttpResponse* serverInfo = [_httpManager executeRequestSynchronously:[_httpManager newServerInfoRequest]];
+    if (serverInfo == nil) {
         [_callback pairFailed:@"Unable to connect to PC"];
         return;
     }
-    if (![[HttpManager getStringFromXML:serverInfo tag:@"currentgame"] isEqual:@"0"]) {
-        [_callback pairFailed:@"You must stop streaming before attempting to pair."];
-    }
-    else if (![[HttpManager getStringFromXML:serverInfo tag:@"PairStatus"] isEqual:@"1"]) {
-        [self initiatePair];
-    } else {
-        [_callback alreadyPaired];
+    if ([serverInfo isStatusOk]) {
+        if (![[serverInfo parseStringTag:@"currentgame"] isEqual:@"0"]) {
+            [_callback pairFailed:@"You must stop streaming before attempting to pair."];
+        } else if (![[serverInfo parseStringTag:@"PairStatus"] isEqual:@"1"]) {
+            [self initiatePair];
+        } else {
+            [_callback alreadyPaired];
+        }
     }
 }
 
@@ -48,16 +50,18 @@
     NSLog(@"PIN: %@, saltedPIN: %@", PIN, salt);
     [_callback showPIN:PIN];
     
-    NSData* pairResp = [_httpManager executeRequestSynchronously:[_httpManager newPairRequest:salt]];
-    NSString* pairedString;
-    pairedString = [HttpManager getStringFromXML:pairResp tag:@"paired"];
-    if (pairedString == NULL || ![pairedString isEqualToString:@"1"]) {
-        [_httpManager executeRequestSynchronously:[_httpManager newUnpairRequest]];
+    HttpResponse* pairResp = [_httpManager executeRequestSynchronously:[_httpManager newPairRequest:salt]];
+    if (![self verifyResponseStatus:pairResp]) {
+        return;
+    }
+    NSInteger* pairedStatus;
+    if (![pairResp parseIntTag:@"paired" value:pairedStatus] || !pairedStatus) {
+        [_httpManager executeRequest:[_httpManager newUnpairRequest]];
         [_callback pairFailed:@"Pairing was declined by the target."];
         return;
     }
     
-    NSString* plainCert = [HttpManager getStringFromXML:pairResp tag:@"plaincert"];
+    NSString* plainCert = [pairResp parseStringTag:@"plaincert"];
     
     CryptoManager* cryptoMan = [[CryptoManager alloc] init];
     NSData* aesKey = [cryptoMan createAESKeyFromSalt:salt];
@@ -65,15 +69,17 @@
     NSData* randomChallenge = [Utils randomBytes:16];
     NSData* encryptedChallenge = [cryptoMan aesEncrypt:randomChallenge withKey:aesKey];
     
-    NSData* challengeResp = [_httpManager executeRequestSynchronously:[_httpManager newChallengeRequest:encryptedChallenge]];
-    pairedString = [HttpManager getStringFromXML:challengeResp tag:@"paired"];
-    if (pairedString == NULL || ![pairedString isEqualToString:@"1"]) {
-        [_httpManager executeRequestSynchronously:[_httpManager newUnpairRequest]];
+    HttpResponse* challengeResp = [_httpManager executeRequestSynchronously:[_httpManager newChallengeRequest:encryptedChallenge]];
+    if (![self verifyResponseStatus:challengeResp]) {
+        return;
+    }
+    if (![challengeResp parseIntTag:@"paired" value:pairedStatus] || !pairedStatus) {
+        [_httpManager executeRequest:[_httpManager newUnpairRequest]];
         [_callback pairFailed:@"Pairing stage #2 failed"];
         return;
     }
     
-    NSData* encServerChallengeResp = [Utils hexToBytes:[HttpManager getStringFromXML:challengeResp tag:@"challengeresponse"]];
+    NSData* encServerChallengeResp = [Utils hexToBytes:[challengeResp parseStringTag:@"challengeresponse"]];
     NSData* decServerChallengeResp = [cryptoMan aesDecrypt:encServerChallengeResp withKey:aesKey];
     
     NSData* serverResponse = [decServerChallengeResp subdataWithRange:NSMakeRange(0, 20)];
@@ -83,50 +89,70 @@
     NSData* challengeRespHash = [cryptoMan SHA1HashData:[self concatData:[self concatData:serverChallenge with:[CryptoManager getSignatureFromCert:_cert]] with:clientSecret]];
     NSData* challengeRespEncrypted = [cryptoMan aesEncrypt:challengeRespHash withKey:aesKey];
     
-    NSData* secretResp = [_httpManager executeRequestSynchronously:[_httpManager newChallengeRespRequest:challengeRespEncrypted]];
-    pairedString = [HttpManager getStringFromXML:secretResp tag:@"paired"];
-    if (pairedString == NULL || ![pairedString isEqualToString:@"1"]) {
-        [_httpManager executeRequestSynchronously:[_httpManager newUnpairRequest]];
+    HttpResponse* secretResp = [_httpManager executeRequestSynchronously:[_httpManager newChallengeRespRequest:challengeRespEncrypted]];
+    if (![self verifyResponseStatus:secretResp]) {
+        return;
+    }
+    if (![secretResp parseIntTag:@"paired" value:pairedStatus] || !pairedStatus) {
+        [_httpManager executeRequest:[_httpManager newUnpairRequest]];
         [_callback pairFailed:@"Pairing stage #3 failed"];
         return;
     }
     
-    NSData* serverSecretResp = [Utils hexToBytes:[HttpManager getStringFromXML:secretResp tag:@"pairingsecret"]];
+    NSData* serverSecretResp = [Utils hexToBytes:[secretResp parseStringTag:@"pairingsecret"]];
     NSData* serverSecret = [serverSecretResp subdataWithRange:NSMakeRange(0, 16)];
     NSData* serverSignature = [serverSecretResp subdataWithRange:NSMakeRange(16, 256)];
     
     if (![cryptoMan verifySignature:serverSecret withSignature:serverSignature andCert:[Utils hexToBytes:plainCert]]) {
-        [_httpManager executeRequestSynchronously:[_httpManager newUnpairRequest]];
+        [_httpManager executeRequest:[_httpManager newUnpairRequest]];
         [_callback pairFailed:@"Server certificate invalid"];
         return;
     }
     
     NSData* serverChallengeRespHash = [cryptoMan SHA1HashData:[self concatData:[self concatData:randomChallenge with:[CryptoManager getSignatureFromCert:[Utils hexToBytes:plainCert]]] with:serverSecret]];
     if (![serverChallengeRespHash isEqual:serverResponse]) {
-        [_httpManager executeRequestSynchronously:[_httpManager newUnpairRequest]];
+        [_httpManager executeRequest:[_httpManager newUnpairRequest]];
         [_callback pairFailed:@"Incorrect PIN"];
         return;
     }
     
     NSData* clientPairingSecret = [self concatData:clientSecret with:[cryptoMan signData:clientSecret withKey:[CryptoManager readKeyFromFile]]];
-    NSData* clientSecretResp = [_httpManager executeRequestSynchronously:[_httpManager newClientSecretRespRequest:[Utils bytesToHex:clientPairingSecret]]];
-    pairedString = [HttpManager getStringFromXML:clientSecretResp tag:@"paired"];
-    if (pairedString == NULL || ![pairedString isEqualToString:@"1"]) {
-        [_httpManager executeRequestSynchronously:[_httpManager newUnpairRequest]];
+    HttpResponse* clientSecretResp = [_httpManager executeRequestSynchronously:[_httpManager newClientSecretRespRequest:[Utils bytesToHex:clientPairingSecret]]];
+    if (![self verifyResponseStatus:clientSecretResp]) {
+        return;
+    }
+    if ([clientSecretResp parseIntTag:@"paired" value:pairedStatus] || !pairedStatus) {
+        [_httpManager executeRequest:[_httpManager newUnpairRequest]];
         [_callback pairFailed:@"Pairing stage #4 failed"];
         return;
     }
     
-    NSData* clientPairChallenge = [_httpManager executeRequestSynchronously:[_httpManager newPairChallenge]];
-    pairedString = [HttpManager getStringFromXML:clientPairChallenge tag:@"paired"];
-    if (pairedString == NULL || ![pairedString isEqualToString:@"1"]) {
-        [_httpManager executeRequestSynchronously:[_httpManager newUnpairRequest]];
+    HttpResponse* clientPairChallengeResp = [_httpManager executeRequestSynchronously:[_httpManager newPairChallenge]];
+    if (![self verifyResponseStatus:clientPairChallengeResp]) {
+        return;
+    }
+    if (![clientPairChallengeResp parseIntTag:@"paired" value:pairedStatus] || !pairedStatus) {
+        [_httpManager executeRequest:[_httpManager newUnpairRequest]];
         [_callback pairFailed:@"Pairing stage #5 failed"];
         return;
     }
     [_callback pairSuccessful];
 }
 
+- (BOOL) verifyResponseStatus:(HttpResponse*)resp {
+    if (resp == nil) {
+        [_httpManager executeRequest:[_httpManager newUnpairRequest]];
+        [_callback pairFailed:@"Network error occured."];
+        return false;
+    } else if (![resp isStatusOk]) {
+        [_httpManager executeRequest:[_httpManager newUnpairRequest]];
+        [_callback pairFailed:resp.statusMessage];
+        return false;
+    } else {
+        return true;
+    }
+}
+
 - (NSData*) concatData:(NSData*)data with:(NSData*)moreData {
     NSMutableData* concatData = [[NSMutableData alloc] initWithData:data];
     [concatData appendData:moreData];