basic ios functionality

src/ios/TextResponseSerializer.m

@@ -0,0 +1,58 @@
+#import "TextResponseSerializer.h"
+
+static BOOL AFErrorOrUnderlyingErrorHasCode(NSError *error, NSInteger code) {
+    if (error.code == code) {
+        return YES;
+    } else if (error.userInfo[NSUnderlyingErrorKey]) {
+        return AFErrorOrUnderlyingErrorHasCode(error.userInfo[NSUnderlyingErrorKey], code);
+    }
+
+    return NO;
+}
+
+@implementation TextResponseSerializer
+
++ (instancetype)serializer {
+    TextResponseSerializer *serializer = [[self alloc] init];
+    return serializer;
+}
+
+- (instancetype)init {
+    self = [super init];
+    if (!self) {
+        return nil;
+    }
+
+    self.acceptableContentTypes = [NSSet setWithObjects:@"text/*", nil];
+
+    return self;
+}
+
+#pragma mark - AFURLResponseSerialization
+
+- (id)responseObjectForResponse:(NSURLResponse *)response
+                           data:(NSData *)data
+                          error:(NSError *__autoreleasing *)error
+{
+    if (![self validateResponse:(NSHTTPURLResponse *)response data:data error:error]) {
+        if (AFErrorOrUnderlyingErrorHasCode(*error, NSURLErrorCannotDecodeContentData)) {
+            return nil;
+        }
+    }
+
+    // Workaround for behavior of Rails to return a single space for `head :ok` (a workaround for a bug in Safari), which is not interpreted as valid input by NSJSONSerialization.
+    // See https://github.com/rails/rails/issues/1742
+    NSStringEncoding stringEncoding = self.stringEncoding;
+    if (response.textEncodingName) {
+        CFStringEncoding encoding = CFStringConvertIANACharSetNameToEncoding((CFStringRef)response.textEncodingName);
+        if (encoding != kCFStringEncodingInvalidId) {
+            stringEncoding = CFStringConvertEncodingToNSStringEncoding(encoding);
+        }
+    }
+
+    NSString *responseString = [[NSString alloc] initWithData:data encoding:stringEncoding];
+
+    return responseString;
+}
+
+@end