diff --git a/.gitignore b/.gitignore
index 80667581..d607a8db 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,6 @@
+#Demo
+DemoTestResource/
+
 # System
 .DS_Store
 
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 25c20ac5..66458570 100755
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,4 +1,8 @@
 #Changelog
+## 8.0.4(2020-10-20)
+## 优化
+- 优化超时问题
+
 ## 8.0.3(2020-09-23)
 ## 修正
 - 修复内存峰值问题
diff --git a/Qiniu.podspec b/Qiniu.podspec
index 046886b9..06de72f0 100755
--- a/Qiniu.podspec
+++ b/Qiniu.podspec
@@ -1,6 +1,6 @@
 Pod::Spec.new do |s|
   s.name         = 'Qiniu'
-  s.version      = '8.0.3'
+  s.version      = '8.0.4'
   s.summary      = 'Qiniu Resource Storage SDK for iOS and Mac'
   s.homepage     = 'https://github.com/qiniu/objc-sdk'
   s.social_media_url = 'http://weibo.com/qiniutek'
diff --git a/QiniuDemo/QiniuDemo.xcodeproj/project.pbxproj b/QiniuDemo/QiniuDemo.xcodeproj/project.pbxproj
index b588cb95..038c590e 100644
--- a/QiniuDemo/QiniuDemo.xcodeproj/project.pbxproj
+++ b/QiniuDemo/QiniuDemo.xcodeproj/project.pbxproj
@@ -9,6 +9,7 @@
 /* Begin PBXBuildFile section */
 		26F62ADDD5B6306E978C9A3F /* libPods-QiniuDemoTests.a in Frameworks */ = {isa = PBXBuildFile; fileRef = 14CB2139715DD7B6FD5B146E /* libPods-QiniuDemoTests.a */; };
 		2B848FF719DFA7ECB394CA9F /* libPods-QiniuDemo.a in Frameworks */ = {isa = PBXBuildFile; fileRef = 6B9BC5A8D93F988C1240E05F /* libPods-QiniuDemo.a */; };
+		318191AB2531516F00D18536 /* UploadResource.dmg in Resources */ = {isa = PBXBuildFile; fileRef = 318191AA2531516F00D18536 /* UploadResource.dmg */; };
 		93D230241C86D7F700434F6D /* main.m in Sources */ = {isa = PBXBuildFile; fileRef = 93D230231C86D7F700434F6D /* main.m */; };
 		93D230271C86D7F700434F6D /* AppDelegate.m in Sources */ = {isa = PBXBuildFile; fileRef = 93D230261C86D7F700434F6D /* AppDelegate.m */; };
 		93D2302A1C86D7F700434F6D /* ViewController.m in Sources */ = {isa = PBXBuildFile; fileRef = 93D230291C86D7F700434F6D /* ViewController.m */; };
@@ -39,6 +40,8 @@
 /* Begin PBXFileReference section */
 		14CB2139715DD7B6FD5B146E /* libPods-QiniuDemoTests.a */ = {isa = PBXFileReference; explicitFileType = archive.ar; includeInIndex = 0; path = "libPods-QiniuDemoTests.a"; sourceTree = BUILT_PRODUCTS_DIR; };
 		24EE530BBB100BED89B08A3D /* Pods-QiniuDemo.release.xcconfig */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text.xcconfig; name = "Pods-QiniuDemo.release.xcconfig"; path = "Pods/Target Support Files/Pods-QiniuDemo/Pods-QiniuDemo.release.xcconfig"; sourceTree = "<group>"; };
+		318191AA2531516F00D18536 /* UploadResource.dmg */ = {isa = PBXFileReference; lastKnownFileType = file; path = UploadResource.dmg; sourceTree = "<group>"; };
+		318191AF25315F3500D18536 /* Configure.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = Configure.h; sourceTree = "<group>"; };
 		6B9BC5A8D93F988C1240E05F /* libPods-QiniuDemo.a */ = {isa = PBXFileReference; explicitFileType = archive.ar; includeInIndex = 0; path = "libPods-QiniuDemo.a"; sourceTree = BUILT_PRODUCTS_DIR; };
 		93D2301F1C86D7F700434F6D /* QiniuDemo.app */ = {isa = PBXFileReference; explicitFileType = wrapper.application; includeInIndex = 0; path = QiniuDemo.app; sourceTree = BUILT_PRODUCTS_DIR; };
 		93D230231C86D7F700434F6D /* main.m */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.objc; path = main.m; sourceTree = "<group>"; };
@@ -88,6 +91,15 @@
 /* End PBXFrameworksBuildPhase section */
 
 /* Begin PBXGroup section */
+		318191A92531516F00D18536 /* DemoTestResource */ = {
+			isa = PBXGroup;
+			children = (
+				318191AF25315F3500D18536 /* Configure.h */,
+				318191AA2531516F00D18536 /* UploadResource.dmg */,
+			);
+			path = DemoTestResource;
+			sourceTree = "<group>";
+		};
 		63D8EA8E5532E578D972E007 /* Pods */ = {
 			isa = PBXGroup;
 			children = (
@@ -133,6 +145,7 @@
 		93D230211C86D7F700434F6D /* QiniuDemo */ = {
 			isa = PBXGroup;
 			children = (
+				318191A92531516F00D18536 /* DemoTestResource */,
 				93D230251C86D7F700434F6D /* AppDelegate.h */,
 				93D230261C86D7F700434F6D /* AppDelegate.m */,
 				93D230281C86D7F700434F6D /* ViewController.h */,
@@ -279,6 +292,7 @@
 			buildActionMask = 2147483647;
 			files = (
 				93D230321C86D7F700434F6D /* LaunchScreen.storyboard in Resources */,
+				318191AB2531516F00D18536 /* UploadResource.dmg in Resources */,
 				93D2302F1C86D7F700434F6D /* Assets.xcassets in Resources */,
 				93D2302D1C86D7F700434F6D /* Main.storyboard in Resources */,
 			);
diff --git a/QiniuDemo/QiniuDemo/Base.lproj/Main.storyboard b/QiniuDemo/QiniuDemo/Base.lproj/Main.storyboard
index e97430d2..1757995d 100755
--- a/QiniuDemo/QiniuDemo/Base.lproj/Main.storyboard
+++ b/QiniuDemo/QiniuDemo/Base.lproj/Main.storyboard
@@ -49,16 +49,16 @@
                                     <action selector="chooseAction:" destination="a0v-GO-7Qr" eventType="touchUpInside" id="tAj-mW-jxy"/>
                                 </connections>
                             </button>
-                            <button opaque="NO" contentMode="scaleToFill" contentHorizontalAlignment="center" contentVerticalAlignment="center" buttonType="roundedRect" lineBreakMode="middleTruncation" translatesAutoresizingMaskIntoConstraints="NO" id="Psn-X6-kmD">
+                            <button opaque="NO" contentMode="scaleToFill" contentHorizontalAlignment="center" contentVerticalAlignment="center" lineBreakMode="middleTruncation" translatesAutoresizingMaskIntoConstraints="NO" id="Psn-X6-kmD">
                                 <rect key="frame" x="70" y="662" width="274" height="50"/>
                                 <color key="backgroundColor" red="0.0" green="0.50196081400000003" blue="1" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
                                 <constraints>
                                     <constraint firstAttribute="height" constant="50" id="pu0-Bk-3Gw"/>
                                 </constraints>
-                                <fontDescription key="fontDescription" type="system" pointSize="20"/>
                                 <state key="normal" title="上传">
                                     <color key="titleColor" red="1" green="1" blue="1" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
                                 </state>
+                                <state key="selected" title="取消上传"/>
                                 <connections>
                                     <action selector="uploadAction:" destination="a0v-GO-7Qr" eventType="touchUpInside" id="QAY-9o-VbD"/>
                                 </connections>
diff --git a/QiniuDemo/QiniuDemo/ViewController.m b/QiniuDemo/QiniuDemo/ViewController.m
index 67279fdc..88e891ce 100755
--- a/QiniuDemo/QiniuDemo/ViewController.m
+++ b/QiniuDemo/QiniuDemo/ViewController.m
@@ -6,9 +6,17 @@
 //  Copyright © 2016年 Aaron. All rights reserved.
 //
 
+#import "Configure.h" // 测试参数配置，暂时只有token，可删除
+
 #import "ViewController.h"
 #import "QNTransactionManager.h"
 
+typedef NS_ENUM(NSInteger, UploadState){
+    UploadStatePrepare,
+    UploadStateUploading,
+    UploadStateCancelling
+};
+
 @interface ViewController () <UINavigationControllerDelegate, UIImagePickerControllerDelegate>
 
 @property (nonatomic, weak) IBOutlet UIButton* chooseBtn;
@@ -16,6 +24,7 @@ @interface ViewController () <UINavigationControllerDelegate, UIImagePickerContr
 @property (nonatomic, weak) IBOutlet UIImageView* preViewImage;
 @property (weak, nonatomic) IBOutlet UIProgressView *progressView;
 
+@property (nonatomic, assign) UploadState uploadState;
 @property (nonatomic, strong) NSString *token;
 @property (nonatomic, strong) UIImage *pickImage;
 
@@ -26,6 +35,7 @@ @implementation ViewController
 - (void)viewDidLoad {
     [super viewDidLoad];
     // Do any additional setup after loading the view, typically from a nib.
+    [self changeUploadState:UploadStatePrepare];
     self.title = @"七牛云上传";
 }
 
@@ -33,18 +43,48 @@ - (IBAction)chooseAction:(id)sender {
     [self gotoImageLibrary];
 }
 
-- (IBAction)uploadAction:(id)sender {
-    if (self.pickImage == nil) {
-        [self alertMessage:@"还未选择图片"];
+- (IBAction)uploadAction:(UIButton *)sender {
+    if (self.uploadState == UploadStatePrepare) {
+    
+#ifdef YourToken
+        NSString *path = [[NSBundle mainBundle] pathForResource:@"UploadResource.dmg" ofType:nil];
+        [self uploadImageToQNFilePath:path];
+        [self changeUploadState:UploadStateUploading];
+#else
+        if (self.pickImage == nil) {
+            [self alertMessage:@"还未选择图片"];
+        } else {
+            [self uploadImageToQNFilePath:[self getImagePath:self.pickImage]];
+            [self changeUploadState:UploadStateUploading];
+        }
+#endif
+        
     } else {
-        [self uploadImageToQNFilePath:[self getImagePath:self.pickImage]];
+        [self changeUploadState:UploadStateCancelling];
+    }
+}
+
+- (void)changeUploadState:(UploadState)uploadState{
+    
+    self.uploadState = uploadState;
+    if (uploadState == UploadStatePrepare) {
+        [self.uploadBtn setTitle:@"上传" forState:UIControlStateNormal];
+        self.uploadBtn.enabled = true;
+    } else if (uploadState == UploadStateUploading) {
+        [self.uploadBtn setTitle:@"取消上传" forState:UIControlStateNormal];
+        self.uploadBtn.enabled = true;
+    } else {
+        [self.uploadBtn setTitle:@"取消上传" forState:UIControlStateNormal];
+        self.uploadBtn.enabled = false;
     }
 }
 
 - (void)uploadImageToQNFilePath:(NSString *)filePath {
-    self.token = @"你的token";
+    
+    self.token = YourToken;
     QNConfiguration *configuration = [QNConfiguration build:^(QNConfigurationBuilder *builder) {
         builder.useConcurrentResumeUpload = true;
+        builder.recorder = [QNFileRecorder fileRecorderWithFolder:[NSHomeDirectory() stringByAppendingPathComponent:@"Documents"] error:nil];
     }];
     QNUploadManager *upManager = [[QNUploadManager alloc] initWithConfiguration:configuration];
     
@@ -55,11 +95,16 @@ - (void)uploadImageToQNFilePath:(NSString *)filePath {
     }
                                                                  params:nil
                                                                checkCrc:NO
-                                                     cancellationSignal:nil];
-    [upManager putFile:filePath key:nil token:self.token complete:^(QNResponseInfo *info, NSString *key, NSDictionary *resp) {
+                                                     cancellationSignal:^BOOL{
+        return weakSelf.uploadState == UploadStateCancelling;
+    }];
+    
+    [upManager putFile:filePath key:@"DemoResource" token:self.token complete:^(QNResponseInfo *info, NSString *key, NSDictionary *resp) {
         NSLog(@"info ===== %@", info);
         NSLog(@"resp ===== %@", resp);
-        [self alertMessage:info.message];
+        
+        [weakSelf changeUploadState:UploadStatePrepare];
+        [weakSelf alertMessage:info.message];
     }
                 option:uploadOption];
 }
diff --git a/QiniuSDK.xcodeproj/project.pbxproj b/QiniuSDK.xcodeproj/project.pbxproj
index 7e1930e7..91ada307 100644
--- a/QiniuSDK.xcodeproj/project.pbxproj
+++ b/QiniuSDK.xcodeproj/project.pbxproj
@@ -109,6 +109,9 @@
 		31C2EEEC242DEF6A00713A33 /* QNUtilTest.m in Sources */ = {isa = PBXBuildFile; fileRef = 31C2EEEB242DEF6A00713A33 /* QNUtilTest.m */; };
 		31C2EEED242DEF6A00713A33 /* QNUtilTest.m in Sources */ = {isa = PBXBuildFile; fileRef = 31C2EEEB242DEF6A00713A33 /* QNUtilTest.m */; };
 		31C6E68824ECC75700633629 /* NSData+QNGZip.m in Sources */ = {isa = PBXBuildFile; fileRef = 31259E3124E3D02C00CF7531 /* NSData+QNGZip.m */; };
+		31D8446A254017BD005C0222 /* QNErrorCode.h in Headers */ = {isa = PBXBuildFile; fileRef = 31D84468254017BD005C0222 /* QNErrorCode.h */; };
+		31D8446B254017BD005C0222 /* QNErrorCode.m in Sources */ = {isa = PBXBuildFile; fileRef = 31D84469254017BD005C0222 /* QNErrorCode.m */; };
+		31D8446C254017BD005C0222 /* QNErrorCode.m in Sources */ = {isa = PBXBuildFile; fileRef = 31D84469254017BD005C0222 /* QNErrorCode.m */; };
 		31DD31D624971BD7004BFDDE /* QNUploadFileNameTest.m in Sources */ = {isa = PBXBuildFile; fileRef = 31DD31D524971BD7004BFDDE /* QNUploadFileNameTest.m */; };
 		31DD31D724971BD7004BFDDE /* QNUploadFileNameTest.m in Sources */ = {isa = PBXBuildFile; fileRef = 31DD31D524971BD7004BFDDE /* QNUploadFileNameTest.m */; };
 		31E6B30124D8159F0097527D /* QNDnsCacheInfo.m in Sources */ = {isa = PBXBuildFile; fileRef = 31C2EEC6242CC52600713A33 /* QNDnsCacheInfo.m */; };
@@ -318,6 +321,8 @@
 		31C2EEE1242DE86300713A33 /* QNUtils.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = QNUtils.h; sourceTree = "<group>"; };
 		31C2EEE2242DE86300713A33 /* QNUtils.m */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.objc; path = QNUtils.m; sourceTree = "<group>"; };
 		31C2EEEB242DEF6A00713A33 /* QNUtilTest.m */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.objc; path = QNUtilTest.m; sourceTree = "<group>"; };
+		31D84468254017BD005C0222 /* QNErrorCode.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = QNErrorCode.h; sourceTree = "<group>"; };
+		31D84469254017BD005C0222 /* QNErrorCode.m */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.objc; path = QNErrorCode.m; sourceTree = "<group>"; };
 		31DD31D524971BD7004BFDDE /* QNUploadFileNameTest.m */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.objc; path = QNUploadFileNameTest.m; sourceTree = "<group>"; };
 		31F5537D2456F2F2000B66AD /* QNUrlSafeBase64.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = QNUrlSafeBase64.m; sourceTree = "<group>"; };
 		31F5537E2456F2F2000B66AD /* QNPHAssetResource.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = QNPHAssetResource.h; sourceTree = "<group>"; };
@@ -718,6 +723,8 @@
 				31494470244851DE00386F16 /* QNAutoZone.m */,
 				31494474244852BA00386F16 /* QNFixedZone.h */,
 				31494475244852BA00386F16 /* QNFixedZone.m */,
+				31D84468254017BD005C0222 /* QNErrorCode.h */,
+				31D84469254017BD005C0222 /* QNErrorCode.m */,
 			);
 			path = Common;
 			sourceTree = "<group>";
@@ -846,6 +853,7 @@
 				31494476244852BA00386F16 /* QNFixedZone.h in Headers */,
 				31494471244851DE00386F16 /* QNAutoZone.h in Headers */,
 				31C2EECC242CC52600713A33 /* QNDnsCacheFile.h in Headers */,
+				31D8446A254017BD005C0222 /* QNErrorCode.h in Headers */,
 				31F553D024597182000B66AD /* QNHttpSingleRequest.h in Headers */,
 				CC2513C42455C141003F4C65 /* QNTempFile.h in Headers */,
 				3149A1D324626B3100A2A15B /* QNUploadSystemClient.h in Headers */,
@@ -1154,6 +1162,7 @@
 				DFA9B64A19E0018800A15FD1 /* QNUploadOption.m in Sources */,
 				CC3F322422C0CCDF00F23681 /* QNUploadInfoReporter.m in Sources */,
 				DF2CDE6A19DAC6A400CE01FB /* QNUploadManager.m in Sources */,
+				31D8446B254017BD005C0222 /* QNErrorCode.m in Sources */,
 				3149A1DD2462A57400A2A15B /* QNUploadDomainRegion.m in Sources */,
 				31C2EEE4242DE86300713A33 /* QNUtils.m in Sources */,
 				31FD0920248662F900217848 /* QNUploadServerFreezeManager.m in Sources */,
@@ -1221,6 +1230,7 @@
 				31A18421246BD988001D6EEE /* QNUploadRequestInfo.m in Sources */,
 				31F553CD24596C3D000B66AD /* QNHttpRegionRequest.m in Sources */,
 				31F553B72457D2FF000B66AD /* QNSystem.m in Sources */,
+				31D8446C254017BD005C0222 /* QNErrorCode.m in Sources */,
 				31E6B30124D8159F0097527D /* QNDnsCacheInfo.m in Sources */,
 				CC2513B8245423C3003F4C65 /* QNConcurrentResumeUpload.m in Sources */,
 				31F553C22457FFB0000B66AD /* QNPipeline.m in Sources */,
diff --git a/QiniuSDK/Collect/QNReportItem.m b/QiniuSDK/Collect/QNReportItem.m
index 2a19ddb2..24672517 100644
--- a/QiniuSDK/Collect/QNReportItem.m
+++ b/QiniuSDK/Collect/QNReportItem.m
@@ -116,8 +116,10 @@ - (NSString *)requestReportErrorType{
         errorType = @"parse_error";
     } else if (self.statusCode == -1007 || self.statusCode == -1010 || self.statusCode == kQNMaliciousResponseError){
         errorType = @"malicious_response";
+    } else if (self.statusCode > -1130 && self.statusCode <= -1100){
+        errorType = @"unexpected_syscall_error";
     } else if (self.statusCode == kQNRequestCancelled
-            || self.statusCode == NSURLErrorCancelled){
+               || self.statusCode == NSURLErrorCancelled){
         errorType = @"user_canceled";
     } else {
         errorType = @"unknown_error";
diff --git a/QiniuSDK/Common/QNErrorCode.h b/QiniuSDK/Common/QNErrorCode.h
new file mode 100644
index 00000000..ccfcc8be
--- /dev/null
+++ b/QiniuSDK/Common/QNErrorCode.h
@@ -0,0 +1,54 @@
+//
+//  QNErrorCode.h
+//  QiniuSDK
+//
+//  Created by yangsen on 2020/10/21.
+//  Copyright © 2020 Qiniu. All rights reserved.
+//
+
+#import <Foundation/Foundation.h>
+
+/**
+ *    中途取消的状态码
+ */
+extern const int kQNRequestCancelled;
+
+/**
+ *    网络错误状态码
+ */
+extern const int kQNNetworkError;
+
+/**
+ *    错误参数状态码
+ */
+extern const int kQNInvalidArgument;
+
+/**
+ *    0 字节文件或数据
+ */
+extern const int kQNZeroDataSize;
+
+/**
+ *    错误token状态码
+ */
+extern const int kQNInvalidToken;
+
+/**
+ *    读取文件错误状态码
+ */
+extern const int kQNFileError;
+
+/**
+ *    本地 I/O 错误
+ */
+extern const int kQNLocalIOError;
+
+/**
+ *    ⽤户劫持错误 错误
+ */
+extern const int kQNMaliciousResponseError;
+
+/**
+ *    非预期的系统调用 错误
+ */
+extern const int kQNUnexpectedSysCallError;
diff --git a/QiniuSDK/Common/QNErrorCode.m b/QiniuSDK/Common/QNErrorCode.m
new file mode 100644
index 00000000..23518053
--- /dev/null
+++ b/QiniuSDK/Common/QNErrorCode.m
@@ -0,0 +1,19 @@
+//
+//  QNErrorCode.m
+//  QiniuSDK
+//
+//  Created by yangsen on 2020/10/21.
+//  Copyright © 2020 Qiniu. All rights reserved.
+//
+
+#import "QNErrorCode.h"
+
+const int kQNZeroDataSize = -6;
+const int kQNInvalidToken = -5;
+const int kQNFileError = -4;
+const int kQNInvalidArgument = -3;
+const int kQNRequestCancelled = -2;
+const int kQNNetworkError = -1;
+const int kQNLocalIOError = -7;
+const int kQNMaliciousResponseError = -8;
+const int kQNUnexpectedSysCallError = -10;
diff --git a/QiniuSDK/Http/QNResponseInfo.h b/QiniuSDK/Http/QNResponseInfo.h
index 8f9428e6..91606a8d 100755
--- a/QiniuSDK/Http/QNResponseInfo.h
+++ b/QiniuSDK/Http/QNResponseInfo.h
@@ -7,47 +7,7 @@
 //
 
 #import "QNUploadRequestMetrics.h"
-
-/**
- *    中途取消的状态码
- */
-extern const int kQNRequestCancelled;
-
-/**
- *    网络错误状态码
- */
-extern const int kQNNetworkError;
-
-/**
- *    错误参数状态码
- */
-extern const int kQNInvalidArgument;
-
-/**
- *    0 字节文件或数据
- */
-extern const int kQNZeroDataSize;
-
-/**
- *    错误token状态码
- */
-extern const int kQNInvalidToken;
-
-/**
- *    读取文件错误状态码
- */
-extern const int kQNFileError;
-
-/**
- *    本地 I/O 错误
- */
-extern const int kQNLocalIOError;
-
-/**
- *    ⽤户劫持错误 错误
- */
-extern const int kQNMaliciousResponseError;
-
+#import "QNErrorCode.h"
 
 /**
  *    上传完成后返回的状态信息
@@ -88,6 +48,10 @@ extern const int kQNMaliciousResponseError;
 @property (nonatomic, readonly) BOOL couldHostRetry;
 /// 单个Region是否可以再次重试
 @property (nonatomic, readonly) BOOL couldRegionRetry;
+/// 当前host是否可达
+@property (nonatomic, readonly) BOOL canConnectToHost;
+/// 当前host是否可用
+@property (nonatomic, readonly) BOOL isHostUnavailable;
 /// 是否为 七牛响应
 @property (nonatomic, readonly, getter=isNotQiniu) BOOL notQiniu;
 
diff --git a/QiniuSDK/Http/QNResponseInfo.m b/QiniuSDK/Http/QNResponseInfo.m
index 5f1a6210..1f6b7678 100755
--- a/QiniuSDK/Http/QNResponseInfo.m
+++ b/QiniuSDK/Http/QNResponseInfo.m
@@ -10,15 +10,6 @@
 #import "QNUserAgent.h"
 #import "QNUtils.h"
 
-const int kQNZeroDataSize = -6;
-const int kQNInvalidToken = -5;
-const int kQNFileError = -4;
-const int kQNInvalidArgument = -3;
-const int kQNRequestCancelled = -2;
-const int kQNNetworkError = -1;
-const int kQNLocalIOError = -7;
-const int kQNMaliciousResponseError = -8;
-
 static NSString *kQNErrorDomain = @"qiniu.com";
 
 @interface QNResponseInfo ()
@@ -204,7 +195,7 @@ - (BOOL)couldRetry {
         || _statusCode == 608 || _statusCode == 612 || _statusCode == 614 || _statusCode == 616
         || _statusCode == 619 || _statusCode == 630 || _statusCode == 631 || _statusCode == 640
         || _statusCode == 701
-        ||(_statusCode < 0 && _statusCode > -1000)) {
+        || (_statusCode < -1 && _statusCode > -1000)) {
         return NO;
     } else {
         return YES;
@@ -212,10 +203,7 @@ - (BOOL)couldRetry {
 }
 
 - (BOOL)couldRegionRetry{
-    if ([self couldRetry] == NO
-        || _statusCode == 400
-        || _statusCode == 502 || _statusCode == 503 || _statusCode == 579 || _statusCode == 599
-        || self.isCancelled) {
+    if ([self couldRetry] == NO || _statusCode == 400 || _statusCode == 579 ) {
         return NO;
     } else {
         return YES;
@@ -223,13 +211,32 @@ - (BOOL)couldRegionRetry{
 }
 
 - (BOOL)couldHostRetry{
-    if ([self couldRegionRetry] == NO || _statusCode == 571) {
+    if ([self couldRegionRetry] == NO
+        || _statusCode == 502 || _statusCode == 503 || _statusCode == 571 || _statusCode == 599) {
         return NO;
     } else {
         return YES;
     }
 }
 
+- (BOOL)canConnectToHost{
+    if (_statusCode > 99 || self.isCancelled) {
+        return true;
+    } else {
+        return false;
+    }
+}
+
+- (BOOL)isHostUnavailable{
+    // 基本不可恢复，注：会影响下次请求，范围太大可能会造成大量的timeout
+    if ((_statusCode >= -2000 && _statusCode <= -1200)
+        || _statusCode == 502 || _statusCode == 503 || _statusCode == 504 || _statusCode == 599) {
+        return true;
+    } else {
+        return false;
+    }
+}
+
 - (BOOL)isConnectionBroken {
     return _statusCode == kQNNetworkError || _statusCode == NSURLErrorNotConnectedToInternet;
 }
diff --git a/QiniuSDK/Http/Request/HttpClient/UrlProtocol/QNCFHttpClient.m b/QiniuSDK/Http/Request/HttpClient/UrlProtocol/QNCFHttpClient.m
index ec92a78d..828e79f4 100644
--- a/QiniuSDK/Http/Request/HttpClient/UrlProtocol/QNCFHttpClient.m
+++ b/QiniuSDK/Http/Request/HttpClient/UrlProtocol/QNCFHttpClient.m
@@ -6,9 +6,11 @@
 //  Copyright © 2020 com.qiniu. All rights reserved.
 //
 
+#import "QNErrorCode.h"
 #import "QNDefine.h"
 #import "QNCFHttpClient.h"
 #import "NSURLRequest+QNRequest.h"
+#import <sys/errno.h>
 
 @interface QNCFHttpClient()<NSStreamDelegate>
 
@@ -156,7 +158,7 @@ - (void)evaluateInputStreamServerTrust{
         self.isInputStreamEvaluated = YES;
     } else {
         [self delegate_onError:[NSError errorWithDomain:@"CFNetwork SSLHandshake failed"
-                                                   code:-9807
+                                                   code:NSURLErrorSecureConnectionFailed
                                                userInfo:nil]];
     }
 }
@@ -286,8 +288,8 @@ - (void)stream:(NSStream *)aStream handleEvent:(NSStreamEvent)eventCode{
                 break;
             case NSStreamEventErrorOccurred:{
                 [self endProgress: YES];
+                [self delegate_onError:[self translateCFNetworkErrorIntoUrlError:[self.inputStream streamError]]];
                 [self closeInputStream];
-                [self delegate_onError:[self.inputStream streamError]];
             }
                 break;
             case NSStreamEventEndEncountered:{
@@ -361,6 +363,266 @@ - (void)timerAction{
     }
 }
 
+- (NSError *)translateCFNetworkErrorIntoUrlError:(NSError *)cfError{
+    if (cfError == nil) {
+        return nil;
+    }
+    
+    NSInteger errorCode = kQNNetworkError;
+    NSString *errorInfo = [NSString stringWithFormat:@"cf client:[%ld] %@", (long)errorCode, cfError.localizedDescription];
+    switch (cfError.code) {
+        case ENOENT: /* No such file or directory */
+            errorCode = NSFileNoSuchFileError;
+            break;
+        case EIO: /* Input/output error */
+            errorCode = kQNLocalIOError;
+            break;
+        case E2BIG: /* Argument list too long */
+            break;
+        case ENOEXEC: /* Exec format error */
+            errorCode = kQNLocalIOError;
+            break;
+        case EBADF: /* Bad file descriptor */
+            errorCode = kQNLocalIOError;
+            break;
+        case ECHILD: /* No child processes */
+            errorCode = kQNUnexpectedSysCallError;
+            break;
+        case EDEADLK: /* Resource deadlock avoided */
+            errorCode = kQNUnexpectedSysCallError;
+            break;
+        case ENOMEM: /* Cannot allocate memory */
+            errorCode = kQNUnexpectedSysCallError;
+            break;
+        case EACCES: /* Permission denied */
+            errorCode = NSURLErrorNoPermissionsToReadFile;
+            break;
+        case EFAULT: /* Bad address */
+            errorCode = NSURLErrorBadURL;
+            break;
+        case EBUSY: /* Device / Resource busy */
+            errorCode = kQNUnexpectedSysCallError;
+            break;
+        case EEXIST: /* File exists */
+            errorCode = kQNUnexpectedSysCallError;
+            break;
+        case ENODEV: /* Operation not supported by device */
+            errorCode = kQNUnexpectedSysCallError;
+            break;
+        case EISDIR: /* Is a directory */
+            errorCode = NSURLErrorFileIsDirectory;
+            break;
+        case ENOTDIR: /* Not a directory */
+            errorCode = kQNUnexpectedSysCallError;
+            break;
+        case EINVAL: /* Invalid argument */
+            errorCode = kQNUnexpectedSysCallError;
+            break;
+        case ENFILE: /* Too many open files in system */
+            errorCode = kQNUnexpectedSysCallError;
+            break;
+        case EMFILE: /* Too many open files */
+            errorCode = kQNUnexpectedSysCallError;
+            break;
+        case EFBIG: /* File too large */
+            errorCode = kQNUnexpectedSysCallError;
+            break;
+        case ENOSPC: /* No space left on device */
+            errorCode = kQNUnexpectedSysCallError;
+            break;
+        case ESPIPE: /* Illegal seek */
+            errorCode = kQNUnexpectedSysCallError;
+            break;
+        case EMLINK: /* Too many links */
+            errorCode = kQNUnexpectedSysCallError;
+            break;
+        case EPIPE: /* Broken pipe */
+            errorCode = kQNUnexpectedSysCallError;
+            break;
+        case EDOM: /* Numerical argument out of domain */
+            errorCode = kQNUnexpectedSysCallError;
+            break;
+        case ERANGE: /* Result too large */
+            errorCode = kQNUnexpectedSysCallError;
+            break;
+        case EAGAIN: /* Resource temporarily unavailable */
+            break;
+        case ENOTSOCK: /* Socket operation on non-socket */
+            break;
+        case EDESTADDRREQ: /* Destination address required */
+            errorCode = NSURLErrorBadURL;
+            break;
+        case EMSGSIZE: /* Message too long */
+            break;
+        case EPROTOTYPE: /* Protocol wrong type for socket */
+            break;
+        case ENOPROTOOPT: /* Protocol not available */
+            break;
+        case EPROTONOSUPPORT: /* Protocol not supported */
+            break;
+        case ENOTSUP: /* Operation not supported */
+            break;
+        case EPFNOSUPPORT: /* Protocol family not supported */
+            break;
+        case EAFNOSUPPORT: /* Address family not supported by protocol family */
+            break;
+        case EADDRINUSE: /* Address already in use */
+            break;
+        case EADDRNOTAVAIL: /* Can't assign requested address */
+            break;
+        case ENETDOWN: /* Network is down */
+            errorCode = NSURLErrorCannotConnectToHost;
+            break;
+        case ENETUNREACH: /* Network is unreachable */
+            errorCode = NSURLErrorNetworkConnectionLost;
+            break;
+        case ENETRESET: /* Network dropped connection on reset */
+            errorCode = NSURLErrorNetworkConnectionLost;
+            break;
+        case ECONNABORTED: /* Software caused connection abort */
+            errorCode = NSURLErrorNetworkConnectionLost;
+            break;
+        case ECONNRESET: /* Connection reset by peer */
+            errorCode = NSURLErrorNetworkConnectionLost;
+            break;
+        case ENOBUFS: /* No buffer space available */
+            errorCode = kQNUnexpectedSysCallError;
+            break;
+        case EISCONN: /* Socket is already connected */
+            break;
+        case ENOTCONN: /* Socket is not connected */
+            errorCode = NSURLErrorCannotConnectToHost;
+            break;
+        case ESHUTDOWN: /* Can't send after socket shutdown */
+            break;
+        case ETOOMANYREFS: /* Too many references: can't splice */
+            break;
+        case ETIMEDOUT: /* Operation timed out */
+            errorCode = NSURLErrorTimedOut;
+            break;
+        case ECONNREFUSED: /* Connection refused */
+            errorCode = NSURLErrorCannotConnectToHost;
+            break;
+        case ELOOP: /* Too many levels of symbolic links */
+            errorCode = kQNUnexpectedSysCallError;
+            break;
+        case ENAMETOOLONG: /* File name too long */
+            break;
+        case EHOSTDOWN: /* Host is down */
+            break;
+        case EHOSTUNREACH: /* No route to host */
+            break;
+        case ENOTEMPTY: /* Directory not empty */
+            break;
+        case EPROCLIM: /* Too many processes */
+            errorCode = kQNUnexpectedSysCallError;
+            break;
+        case EUSERS: /* Too many users */
+            errorCode = kQNUnexpectedSysCallError;
+            break;
+        case EDQUOT: /* Disc quota exceeded */
+            errorCode = kQNUnexpectedSysCallError;
+            break;
+        case ESTALE: /* Stale NFS file handle */
+            errorCode = kQNUnexpectedSysCallError;
+            break;
+        case EREMOTE: /* Too many levels of remote in path */
+            break;
+        case EBADRPC: /* RPC struct is bad */
+            errorCode = kQNUnexpectedSysCallError;
+            break;
+        case ERPCMISMATCH: /* RPC version wrong */
+            errorCode = kQNUnexpectedSysCallError;
+            break;
+        case EPROGUNAVAIL: /* RPC prog. not avail */
+            errorCode = kQNUnexpectedSysCallError;
+            break;
+        case EPROGMISMATCH: /* Program version wrong */
+            errorCode = kQNUnexpectedSysCallError;
+            break;
+        case EPROCUNAVAIL: /* Bad procedure for program */
+            errorCode = kQNUnexpectedSysCallError;
+            break;
+        case ENOLCK: /* No locks available */
+            errorCode = kQNUnexpectedSysCallError;
+            break;
+        case ENOSYS: /* Function not implemented */
+            errorCode = kQNUnexpectedSysCallError;
+            break;
+        case EFTYPE: /* Inappropriate file type or format */
+            break;
+        case EAUTH: /* Authentication error */
+            break;
+        case ENEEDAUTH: /* Need authenticator */
+            break;
+        case EPWROFF: /* Device power is off */
+            errorCode = kQNUnexpectedSysCallError;
+            break;
+        case EDEVERR: /* Device error, e.g. paper out */
+            errorCode = kQNUnexpectedSysCallError;
+            break;
+        case EOVERFLOW: /* Value too large to be stored in data type */
+            errorCode = kQNUnexpectedSysCallError;
+            break;
+        case EBADEXEC: /* Bad executable */
+            errorCode = kQNUnexpectedSysCallError;
+            break;
+        case EBADARCH: /* Bad CPU type in executable */
+            errorCode = kQNUnexpectedSysCallError;
+            break;
+        case ESHLIBVERS: /* Shared library version mismatch */
+            errorCode = kQNUnexpectedSysCallError;
+            break;
+        case EBADMACHO: /* Malformed Macho file */
+            errorCode = kQNUnexpectedSysCallError;
+            break;
+        case ECANCELED: /* Operation canceled */
+            errorCode = NSURLErrorCancelled;
+            break;
+        case EIDRM: /* Identifier removed */
+            break;
+        case ENOMSG: /* No message of desired type */
+            break;
+        case EILSEQ: /* Illegal byte sequence */
+            break;
+        case ENOATTR: /* Attribute not found */
+            break;
+        case EBADMSG: /* Bad message */
+            break;
+        case EMULTIHOP: /* Reserved */
+            break;
+        case ENODATA: /* No message available on STREAM */
+            break;
+        case ENOLINK: /* Reserved */
+            break;
+        case ENOSR: /* No STREAM resources */
+            break;
+        case ENOSTR: /* Not a STREAM */
+            break;
+        case EPROTO: /* Protocol error */
+            break;
+        case ETIME: /* STREAM ioctl timeout */
+            errorCode = NSURLErrorTimedOut;
+            break;
+        case EOPNOTSUPP: /* Operation not supported on socket */
+            break;
+        case ENOPOLICY: /* No such policy registered */
+            break;
+        case ENOTRECOVERABLE: /* State not recoverable */
+            break;
+        case EOWNERDEAD: /* Previous owner died */
+            errorCode = kQNUnexpectedSysCallError;
+            break;
+        case EQFULL: /* Interface output queue is full */
+            break;
+
+        default:
+            break;
+    }
+    
+    return [NSError errorWithDomain:NSURLErrorDomain code:errorCode userInfo:@{@"UserInfo" : errorInfo ?: @""}];
+}
+
 
 //MARK: -- delegate action
 - (void)delegate_redirectedToRequest:(NSURLRequest *)request
diff --git a/QiniuSDK/Http/Request/QNHttpRegionRequest.m b/QiniuSDK/Http/Request/QNHttpRegionRequest.m
index b48156ff..aa452893 100644
--- a/QiniuSDK/Http/Request/QNHttpRegionRequest.m
+++ b/QiniuSDK/Http/Request/QNHttpRegionRequest.m
@@ -182,14 +182,11 @@ - (void)complete:(QNResponseInfo *)responseInfo
 //MARK: --
 - (id <QNUploadServer>)getNextServer:(QNResponseInfo *)responseInfo{
 
-    if (responseInfo == nil) {
-        return [self.region getNextServer:NO freezeServer:nil];
-    }
-    
-    if (responseInfo.isTlsError == YES) {
+    if (responseInfo.isTlsError) {
         self.isUseOldServer = YES;
     }
-    return [self.region getNextServer:self.isUseOldServer freezeServer:self.currentServer];
+    
+    return [self.region getNextServer:self.isUseOldServer responseInfo:responseInfo freezeServer:self.currentServer];
 }
 
 @end
diff --git a/QiniuSDK/Http/Request/QNUploadRegionInfo.h b/QiniuSDK/Http/Request/QNUploadRegionInfo.h
index 166d68f2..906c975f 100644
--- a/QiniuSDK/Http/Request/QNUploadRegionInfo.h
+++ b/QiniuSDK/Http/Request/QNUploadRegionInfo.h
@@ -10,7 +10,7 @@
 
 NS_ASSUME_NONNULL_BEGIN
 
-@class QNZoneInfo;
+@class QNZoneInfo, QNResponseInfo;
 
 @protocol QNUploadRegion <NSObject>
 
@@ -20,6 +20,7 @@ NS_ASSUME_NONNULL_BEGIN
 - (void)setupRegionData:(QNZoneInfo * _Nullable)zoneInfo;
 
 - (id<QNUploadServer> _Nullable)getNextServer:(BOOL)isOldServer
+                                 responseInfo:(QNResponseInfo *)responseInfo
                                  freezeServer:(id <QNUploadServer> _Nullable)freezeServer;
 
 @end
diff --git a/QiniuSDK/Http/ServerRegion/QNUploadDomainRegion.m b/QiniuSDK/Http/ServerRegion/QNUploadDomainRegion.m
index f1e73c6f..5fc72c37 100644
--- a/QiniuSDK/Http/ServerRegion/QNUploadDomainRegion.m
+++ b/QiniuSDK/Http/ServerRegion/QNUploadDomainRegion.m
@@ -7,6 +7,7 @@
 //
 
 #import "QNUploadDomainRegion.h"
+#import "QNResponseInfo.h"
 #import "QNUploadServer.h"
 #import "QNZoneInfo.h"
 #import "QNUploadServerFreezeManager.h"
@@ -47,7 +48,7 @@ + (QNUploadServerDomain *)domain:(NSString *)host{
     domain.isAllFrozen = false;
     return domain;
 }
-- (QNUploadServer *)getServer{
+- (QNUploadServer *)getServer:(NSArray <QNUploadServerFreezeManager *> *)freezeManagerList{
     if (self.isAllFrozen || !self.host || self.host.length == 0) {
         return nil;
     }
@@ -56,12 +57,17 @@ - (QNUploadServer *)getServer{
         [self createIpGroupList];
     }
     
+    // Host解析出IP时:
     if (self.ipGroupList && self.ipGroupList.count > 0) {
         QNUploadServer *server = nil;
         for (QNUploadIpGroup *ipGroup in self.ipGroupList) {
-            if (![kQNUploadServerFreezeManager isFrozenHost:self.host type:ipGroup.groupType]) {
+            if (![self isGroup:ipGroup.groupType frozenByFreezeManagers:freezeManagerList]) {
                 id <QNIDnsNetworkAddress> inetAddress = [ipGroup getServerIP];
-                server = [QNUploadServer server:self.host host:self.host ip:inetAddress.ipValue source:inetAddress.sourceValue ipPrefetchedTime:inetAddress.timestampValue];
+                server = [QNUploadServer server:self.host
+                                           host:self.host
+                                             ip:inetAddress.ipValue
+                                         source:inetAddress.sourceValue
+                               ipPrefetchedTime:inetAddress.timestampValue];
                 break;
             }
         }
@@ -69,13 +75,36 @@ - (QNUploadServer *)getServer{
             self.isAllFrozen = true;
         }
         return server;
-    } else if (![kQNUploadServerFreezeManager isFrozenHost:self.host type:nil]){
+    }
+    
+    // Host未解析出IP时:
+    NSString *groupType = [QNUtils getIpType:nil host:self.host];
+    if (![self isGroup:groupType frozenByFreezeManagers:freezeManagerList]){
         return [QNUploadServer server:self.host host:self.host ip:nil source:nil ipPrefetchedTime:nil];
     } else {
         self.isAllFrozen = true;
         return nil;
     }
 }
+
+- (BOOL)isGroup:(NSString *)groupType frozenByFreezeManagers:(NSArray <QNUploadServerFreezeManager *> *)freezeManagerList{
+    if (!groupType) {
+        return YES;
+    }
+    if (!freezeManagerList || freezeManagerList.count == 0) {
+        return NO;
+    }
+    
+    BOOL isFrozen = NO;
+    for (QNUploadServerFreezeManager *freezeManager in freezeManagerList) {
+        isFrozen = [freezeManager isFrozenHost:self.host type:groupType];
+        if (isFrozen) {
+            break;
+        }
+    }
+    return isFrozen;
+}
+
 - (QNUploadServer *)getOneServer{
     if (!self.host || self.host.length == 0) {
         return nil;
@@ -117,8 +146,8 @@ - (void)createIpGroupList{
         self.ipGroupList = ipGroupList;
     }
 }
-- (void)freeze:(NSString *)ip{
-    [kQNUploadServerFreezeManager freezeHost:self.host type:[QNUtils getIpType:ip host:self.host]];
+- (void)freeze:(NSString *)ip freezeManager:(QNUploadServerFreezeManager *)freezeManager frozenTime:(NSInteger)frozenTime{
+    [freezeManager freezeHost:self.host type:[QNUtils getIpType:ip host:self.host] frozenTime:frozenTime];
 }
 
 @end
@@ -128,6 +157,8 @@ @interface QNUploadDomainRegion()
 // 是否获取过，PS：当第一次获取Domain，而区域所有Domain又全部冻结时，返回一个domain尝试一次
 @property(atomic   , assign)BOOL hasGot;
 @property(atomic   , assign)BOOL isAllFrozen;
+// 局部冻结管理对象
+@property(nonatomic, strong)QNUploadServerFreezeManager *partialFreezeManager;
 @property(nonatomic, strong)NSArray <NSString *> *domainHostList;
 @property(nonatomic, strong)NSDictionary <NSString *, QNUploadServerDomain *> *domainDictionary;
 @property(nonatomic, strong)NSArray <NSString *> *oldDomainHostList;
@@ -145,6 +176,7 @@ - (void)setupRegionData:(QNZoneInfo *)zoneInfo{
     _zoneInfo = zoneInfo;
     
     self.isAllFrozen = NO;
+    
     NSMutableArray *serverGroups = [NSMutableArray array];
     NSMutableArray *domainHostList = [NSMutableArray array];
     if (zoneInfo.domains) {
@@ -173,22 +205,42 @@ - (NSDictionary *)createDomainDictionary:(NSArray <NSString *> *)hosts{
     return [domainDictionary copy];
 }
 
-- (id<QNUploadServer>)getNextServer:(BOOL)isOldServer
-                       freezeServer:(id<QNUploadServer>)freezeServer{
+- (id<QNUploadServer> _Nullable)getNextServer:(BOOL)isOldServer
+                                 responseInfo:(QNResponseInfo *)responseInfo
+                                 freezeServer:(id <QNUploadServer> _Nullable)freezeServer{
     if (self.isAllFrozen) {
         return nil;
     }
     
     if (freezeServer.serverId) {
-        [_domainDictionary[freezeServer.serverId] freeze:freezeServer.ip];
-        [_oldDomainDictionary[freezeServer.serverId] freeze:freezeServer.ip];
+        // 无法连接到Host || Host不可用， 局部冻结
+        if (!responseInfo.canConnectToHost || responseInfo.isHostUnavailable) {
+            [_domainDictionary[freezeServer.serverId] freeze:freezeServer.ip
+                                               freezeManager:self.partialFreezeManager
+                                                  frozenTime:kQNGlobalConfiguration.partialHostFrozenTime];
+            [_oldDomainDictionary[freezeServer.serverId] freeze:freezeServer.ip
+                                                  freezeManager:self.partialFreezeManager
+                                                     frozenTime:kQNGlobalConfiguration.partialHostFrozenTime];
+        }
+        
+        // Host不可用，全局冻结
+        if (responseInfo.isHostUnavailable) {
+            [_domainDictionary[freezeServer.serverId] freeze:freezeServer.ip
+                                               freezeManager:kQNUploadServerFreezeManager
+                                                  frozenTime:kQNGlobalConfiguration.globalHostFrozenTime];
+            [_oldDomainDictionary[freezeServer.serverId] freeze:freezeServer.ip
+                                                  freezeManager:kQNUploadServerFreezeManager
+                                                     frozenTime:kQNGlobalConfiguration.globalHostFrozenTime];
+        }
     }
     
+    
+    
     NSArray *hostList = isOldServer ? self.oldDomainHostList : self.domainHostList;
     NSDictionary *domainInfo = isOldServer ? self.oldDomainDictionary : self.domainDictionary;
     QNUploadServer *server = nil;
     for (NSString *host in hostList) {
-        server = [domainInfo[host] getServer];
+        server = [domainInfo[host] getServer:@[self.partialFreezeManager, kQNUploadServerFreezeManager]];
         if (server) {
            break;
         }
@@ -204,4 +256,12 @@ - (NSDictionary *)createDomainDictionary:(NSArray <NSString *> *)hosts{
     }
     return server;
 }
+
+- (QNUploadServerFreezeManager *)partialFreezeManager{
+    if (!_partialFreezeManager) {
+        _partialFreezeManager = [[QNUploadServerFreezeManager alloc] init];
+    }
+    return _partialFreezeManager;
+}
+
 @end
diff --git a/QiniuSDK/Http/ServerRegion/QNUploadServerFreezeManager.h b/QiniuSDK/Http/ServerRegion/QNUploadServerFreezeManager.h
index 8643ded6..6c64fb34 100644
--- a/QiniuSDK/Http/ServerRegion/QNUploadServerFreezeManager.h
+++ b/QiniuSDK/Http/ServerRegion/QNUploadServerFreezeManager.h
@@ -20,10 +20,16 @@ NS_ASSUME_NONNULL_BEGIN
 /// @param type host类型
 - (BOOL)isFrozenHost:(NSString *)host type:(NSString * _Nullable)type;
 
+/// 冻结host 冻结时间：kQNGlobalConfiguration.globalHostFrozenTime
+/// @param host host
+/// @param type host类型
+- (void)freezeHostA:(NSString *)host type:(NSString * _Nullable)type;
+
 /// 冻结host
 /// @param host host
 /// @param type host类型
-- (void)freezeHost:(NSString *)host type:(NSString * _Nullable)type;
+/// @param frozenTime 冻结时间
+- (void)freezeHost:(NSString *)host type:(NSString * _Nullable)type frozenTime:(NSInteger)frozenTime;
 
 @end
 
diff --git a/QiniuSDK/Http/ServerRegion/QNUploadServerFreezeManager.m b/QiniuSDK/Http/ServerRegion/QNUploadServerFreezeManager.m
index 82c09acf..cc1aa604 100644
--- a/QiniuSDK/Http/ServerRegion/QNUploadServerFreezeManager.m
+++ b/QiniuSDK/Http/ServerRegion/QNUploadServerFreezeManager.m
@@ -6,6 +6,7 @@
 //  Copyright © 2020 Qiniu. All rights reserved.
 //
 
+#import "QNConfiguration.h"
 #import "QNUploadServerFreezeManager.h"
 
 @interface QNUploadServerFreezeItem : NSObject
@@ -29,9 +30,9 @@ - (BOOL)isFrozenByDate:(NSDate *)date{
     }
     return isFrozen;
 }
-- (void)freeze{
+- (void)freeze:(NSInteger)frozenTime{
     @synchronized (self) {
-        self.freezeDate = [NSDate dateWithTimeIntervalSinceNow:10*60];
+        self.freezeDate = [NSDate dateWithTimeIntervalSinceNow:frozenTime];
     }
 }
 @end
@@ -73,6 +74,12 @@ - (BOOL)isFrozenHost:(NSString *)host type:(NSString *)type{
 }
 
 - (void)freezeHost:(NSString *)host type:(NSString *)type{
+    [self freezeHost:host type:type frozenTime:kQNGlobalConfiguration.globalHostFrozenTime];
+}
+
+- (void)freezeHost:(NSString *)host
+              type:(NSString * _Nullable)type
+        frozenTime:(NSInteger)frozenTime{
     if (!host || host.length == 0) {
         return;
     }
@@ -82,7 +89,7 @@ - (void)freezeHost:(NSString *)host type:(NSString *)type{
         item = [QNUploadServerFreezeItem item:host type:type];
         self.freezeInfo[infoKey] = item;
     }
-    [item freeze];
+    [item freeze:frozenTime];
 }
 
 - (NSString *)getItemInfoKey:(NSString *)host type:(NSString *)type{
diff --git a/QiniuSDK/Storage/QNConfiguration.h b/QiniuSDK/Storage/QNConfiguration.h
index 6f40f025..b74f5ef0 100644
--- a/QiniuSDK/Storage/QNConfiguration.h
+++ b/QiniuSDK/Storage/QNConfiguration.h
@@ -68,7 +68,8 @@ typedef void (^QNConfigurationBuilderBlock)(QNConfigurationBuilder *builder);
 @property (readonly) NSTimeInterval retryInterval;
 
 /**
- *    超时时间 单位 秒
+ *    单个请求超时时间 单位 秒
+ *    注：每个文件上传肯能存在多个操作，当每个操作失败时，可能存在多个请求重试。
  */
 @property (readonly) UInt32 timeoutInterval;
 
@@ -78,7 +79,9 @@ typedef void (^QNConfigurationBuilderBlock)(QNConfigurationBuilder *builder);
 @property (nonatomic, assign, readonly) BOOL useHttps;
 
 /**
- *   是否开启并发分片上传，默认为NO
+ *   单个文件是否开启并发分片上传，默认为NO
+ *   单个文件大小大于4M时，会采用分片上传，每个分片会已单独的请求进行上传操作，多个上传操作可以使用并发，
+ *   也可以采用串行，采用并发时，可以设置并发的个数(对concurrentTaskCount进行设置)。
  */
 @property (nonatomic, assign, readonly) BOOL useConcurrentResumeUpload;
 
@@ -154,6 +157,20 @@ typedef void (^QNConfigurationBuilderBlock)(QNConfigurationBuilder *builder);
  */
 @property(nonatomic,  copy, readonly)NSString *dnsCacheDir;
 
+
+/**
+ *   Host全局冻结时间  单位：秒   默认：30  推荐范围：[10 ~ 60]
+ *   当某个Host的上传失败后并且可能短时间无法恢复，会冻结该Host，globalHostFrozenTime为全局冻结时间
+ */
+@property(nonatomic, assign)UInt32 globalHostFrozenTime;
+
+/**
+ *   Host局部冻结时间，只会影响当前长传操作  单位：秒   默认：5*60  推荐范围：[60 ~ 10*60]
+ *   当某个Host的上传失败后并且可能短时间可能会恢复，会冻结该Host，partialHostFrozenTime为全局冻结时间
+ */
+@property(nonatomic, assign)UInt32 partialHostFrozenTime;
+
+
 + (instancetype)shared;
 
 @end
diff --git a/QiniuSDK/Storage/QNConfiguration.m b/QiniuSDK/Storage/QNConfiguration.m
index abf62318..34eab209 100644
--- a/QiniuSDK/Storage/QNConfiguration.m
+++ b/QiniuSDK/Storage/QNConfiguration.m
@@ -78,6 +78,9 @@ - (void)setupData{
     _dnsCacheDir = [NSHomeDirectory() stringByAppendingPathComponent:@"Library/Caches/Dns"];
     _dnsRepreHostNum = 2;
     _dnsCacheTime = kQNDefaultDnsCacheTime;
+    
+    _globalHostFrozenTime = 30;
+    _partialHostFrozenTime = 5*60;
 }
 @end
 
diff --git a/QiniuSDK/Storage/QNPartsUpload.m b/QiniuSDK/Storage/QNPartsUpload.m
index 44217be0..77287eb2 100644
--- a/QiniuSDK/Storage/QNPartsUpload.m
+++ b/QiniuSDK/Storage/QNPartsUpload.m
@@ -110,7 +110,7 @@ - (void)recoverUploadInfoFromRecord{
     QNZoneInfo *zoneInfo = [QNZoneInfo zoneInfoFromDictionary:info[kQNRecordZoneInfoKey]];
     QNUploadFileInfo *fileInfo = [QNUploadFileInfo infoFromDictionary:info[kQNRecordFileInfoKey]];
     self.recoveredFrom = @(fileInfo.progress * fileInfo.size);
-    if (zoneInfo && fileInfo && fileInfo.uploadBlocks.firstObject.size != [self getUploadChunkSize]) {
+    if (zoneInfo && fileInfo && fileInfo.uploadBlocks.firstObject.uploadDataList.firstObject.size == [self getUploadChunkSize]) {
         [self insertRegionAtFirstByZoneInfo:zoneInfo];
         self.uploadFileInfo = fileInfo;
     } else {
diff --git a/QiniuSDK/Utils/QNUtils.h b/QiniuSDK/Utils/QNUtils.h
index 8ac55274..45246b8b 100644
--- a/QiniuSDK/Utils/QNUtils.h
+++ b/QiniuSDK/Utils/QNUtils.h
@@ -52,7 +52,7 @@ NS_ASSUME_NONNULL_BEGIN
 /// 根据ip和host来确定IP的类型，host可为空
 /// @param ip ip
 /// @param host host
-+ (NSString *)getIpType:(NSString *)ip host:(NSString *)host;
++ (NSString *)getIpType:(NSString * _Nullable)ip host:(NSString * _Nullable)host;
 
 @end
 
diff --git a/QiniuSDK/Utils/QNUtils.m b/QiniuSDK/Utils/QNUtils.m
index e0b7497c..94bd2505 100644
--- a/QiniuSDK/Utils/QNUtils.m
+++ b/QiniuSDK/Utils/QNUtils.m
@@ -90,7 +90,7 @@ + (NSString *)formEscape:(NSString *)string{
 
 + (NSString *)getIpType:(NSString *)ip host:(NSString *)host{
     
-    NSString *type = nil;
+    NSString *type = host;
     if (!ip || ip.length == 0) {
         return type;
     }
diff --git a/QiniuSDK/Utils/QNVersion.h b/QiniuSDK/Utils/QNVersion.h
index 83e953e6..6ad4941b 100755
--- a/QiniuSDK/Utils/QNVersion.h
+++ b/QiniuSDK/Utils/QNVersion.h
@@ -11,4 +11,4 @@
 /**
  *    sdk 版本
  */
-static NSString *const kQiniuVersion = @"8.0.3";
+static NSString *const kQiniuVersion = @"8.0.4";
diff --git a/QiniuSDKTests/QNTestConfig.h b/QiniuSDKTests/QNTestConfig.h
index 2173c4cb..b88ad93d 100755
--- a/QiniuSDKTests/QNTestConfig.h
+++ b/QiniuSDKTests/QNTestConfig.h
@@ -7,14 +7,13 @@
 //
 
 // 华东上传凭证
-static NSString *const token_z0 = @"jH983zIUFIP1OVumiBVGeAfiLYJvwrF45S-t22eu:ez4rOXpaVgvi3crRG6AiyVKeiI0=:eyJzY29wZSI6InpvbmUwLXNwYWNlIiwiZGVhZGxpbmUiOjE2MDI4MTM4MzgsICJyZXR1cm5Cb2R5Ijoie1wiZm9vXCI6JCh4OmZvbyksIFwiYmFyXCI6JCh4OmJhciksIFwibWltZVR5cGVcIjokKG1pbWVUeXBlKSwgXCJoYXNoXCI6JChldGFnKSwgXCJrZXlcIjokKGtleSksIFwiZm5hbWVcIjokKGZuYW1lKX0ifQ==";
+static NSString *const token_z0 = @"dxVQk8gyk3WswArbNhdKIwmwibJ9nFsQhMNUmtIM:fZ3KJJuoziYifdcWs3ZyAGEaNwg=:eyJzY29wZSI6ImtvZG8tcGhvbmUtem9uZTAtc3BhY2UiLCJkZWFkbGluZSI6MTYwNzk5OTM3MSwgInJldHVybkJvZHkiOiJ7XCJmb29cIjokKHg6Zm9vKSwgXCJiYXJcIjokKHg6YmFyKSwgXCJtaW1lVHlwZVwiOiQobWltZVR5cGUpLCBcImhhc2hcIjokKGV0YWcpLCBcImtleVwiOiQoa2V5KSwgXCJmbmFtZVwiOiQoZm5hbWUpfSJ9";
 // 华北上传凭证
-static NSString *const token_z1 = @"jH983zIUFIP1OVumiBVGeAfiLYJvwrF45S-t22eu:Kap-Eviyi9IbJGzSPmmw3cUoYtk=:eyJzY29wZSI6InpvbmUxLXNwYWNlIiwiZGVhZGxpbmUiOjE2MDI4MTM4MzgsICJyZXR1cm5Cb2R5Ijoie1wiZm9vXCI6JCh4OmZvbyksIFwiYmFyXCI6JCh4OmJhciksIFwibWltZVR5cGVcIjokKG1pbWVUeXBlKSwgXCJoYXNoXCI6JChldGFnKSwgXCJrZXlcIjokKGtleSksIFwiZm5hbWVcIjokKGZuYW1lKX0ifQ==";
+static NSString *const token_z1 = @"dxVQk8gyk3WswArbNhdKIwmwibJ9nFsQhMNUmtIM:2PxOY2MFmI__f8T1Fa5IeBkMgr4=:eyJzY29wZSI6ImtvZG8tcGhvbmUtem9uZTEtc3BhY2UiLCJkZWFkbGluZSI6MTYwNzk5OTM3MSwgInJldHVybkJvZHkiOiJ7XCJmb29cIjokKHg6Zm9vKSwgXCJiYXJcIjokKHg6YmFyKSwgXCJtaW1lVHlwZVwiOiQobWltZVR5cGUpLCBcImhhc2hcIjokKGV0YWcpLCBcImtleVwiOiQoa2V5KSwgXCJmbmFtZVwiOiQoZm5hbWUpfSJ9";
 // 华南上传凭证
-static NSString *const token_z2 = @"jH983zIUFIP1OVumiBVGeAfiLYJvwrF45S-t22eu:oL_S6KjFynR9K3POoXA4FzrvNaQ=:eyJzY29wZSI6InpvbmUyLXNwYWNlIiwiZGVhZGxpbmUiOjE2MDI4MTM4MzgsICJyZXR1cm5Cb2R5Ijoie1wiZm9vXCI6JCh4OmZvbyksIFwiYmFyXCI6JCh4OmJhciksIFwibWltZVR5cGVcIjokKG1pbWVUeXBlKSwgXCJoYXNoXCI6JChldGFnKSwgXCJrZXlcIjokKGtleSksIFwiZm5hbWVcIjokKGZuYW1lKX0ifQ==";
+static NSString *const token_z2 = @"dxVQk8gyk3WswArbNhdKIwmwibJ9nFsQhMNUmtIM:o-quFL-koBFMH77sY-dfeVFdi2w=:eyJzY29wZSI6ImtvZG8tcGhvbmUtem9uZTItc3BhY2UiLCJkZWFkbGluZSI6MTYwNzk5OTM3MSwgInJldHVybkJvZHkiOiJ7XCJmb29cIjokKHg6Zm9vKSwgXCJiYXJcIjokKHg6YmFyKSwgXCJtaW1lVHlwZVwiOiQobWltZVR5cGUpLCBcImhhc2hcIjokKGV0YWcpLCBcImtleVwiOiQoa2V5KSwgXCJmbmFtZVwiOiQoZm5hbWUpfSJ9";
 // 北美上传凭证
-static NSString *const token_na0 = @"jH983zIUFIP1OVumiBVGeAfiLYJvwrF45S-t22eu:QvVBb6GybzXbwFRpD501sq7rTJQ=:eyJzY29wZSI6InpvbmUtbmEwLXNwYWNlIiwiZGVhZGxpbmUiOjE2MDI4MTM4MzgsICJyZXR1cm5Cb2R5Ijoie1wiZm9vXCI6JCh4OmZvbyksIFwiYmFyXCI6JCh4OmJhciksIFwibWltZVR5cGVcIjokKG1pbWVUeXBlKSwgXCJoYXNoXCI6JChldGFnKSwgXCJrZXlcIjokKGtleSksIFwiZm5hbWVcIjokKGZuYW1lKX0ifQ==";
+static NSString *const token_na0 = @"dxVQk8gyk3WswArbNhdKIwmwibJ9nFsQhMNUmtIM:ZYyUxEAWTX1Dt1SXXBIxsI24lOk=:eyJzY29wZSI6ImtvZG8tcGhvbmUtem9uZS1uYTAtc3BhY2UiLCJkZWFkbGluZSI6MTYwNzk5OTM3MSwgInJldHVybkJvZHkiOiJ7XCJmb29cIjokKHg6Zm9vKSwgXCJiYXJcIjokKHg6YmFyKSwgXCJtaW1lVHlwZVwiOiQobWltZVR5cGUpLCBcImhhc2hcIjokKGV0YWcpLCBcImtleVwiOiQoa2V5KSwgXCJmbmFtZVwiOiQoZm5hbWUpfSJ9";
 // 东南亚上传凭证
-static NSString *const token_as0 = @"jH983zIUFIP1OVumiBVGeAfiLYJvwrF45S-t22eu:ggZIV7H5fzZH7fmvri8bCp8g16k=:eyJzY29wZSI6InpvbmUtYXMwLXNwYWNlIiwiZGVhZGxpbmUiOjE2MDI4MTM4MzgsICJyZXR1cm5Cb2R5Ijoie1wiZm9vXCI6JCh4OmZvbyksIFwiYmFyXCI6JCh4OmJhciksIFwibWltZVR5cGVcIjokKG1pbWVUeXBlKSwgXCJoYXNoXCI6JChldGFnKSwgXCJrZXlcIjokKGtleSksIFwiZm5hbWVcIjokKGZuYW1lKX0ifQ==";
-static NSString *const invalidBucketToken = @"jH983zIUFIP1OVumiBVGeAfiLYJvwrF45S-t22eu:h1suPy2XxIUQqWkpvXGWp04R_xc=:eyJzY29wZSI6InpvbmVfaW52YWxpZCIsImRlYWRsaW5lIjoxNjAyODEzODM4LCAicmV0dXJuQm9keSI6IntcImZvb1wiOiQoeDpmb28pLCBcImJhclwiOiQoeDpiYXIpLCBcIm1pbWVUeXBlXCI6JChtaW1lVHlwZSksIFwiaGFzaFwiOiQoZXRhZyksIFwia2V5XCI6JChrZXkpLCBcImZuYW1lXCI6JChmbmFtZSl9In0=";
-
+static NSString *const token_as0 = @"dxVQk8gyk3WswArbNhdKIwmwibJ9nFsQhMNUmtIM:-Cl2qhwXsjvzY7LoLjTiCzo1uE4=:eyJzY29wZSI6ImtvZG8tcGhvbmUtem9uZS1hczAtc3BhY2UiLCJkZWFkbGluZSI6MTYwNzk5OTM3MSwgInJldHVybkJvZHkiOiJ7XCJmb29cIjokKHg6Zm9vKSwgXCJiYXJcIjokKHg6YmFyKSwgXCJtaW1lVHlwZVwiOiQobWltZVR5cGUpLCBcImhhc2hcIjokKGV0YWcpLCBcImtleVwiOiQoa2V5KSwgXCJmbmFtZVwiOiQoZm5hbWUpfSJ9";
+static NSString *const invalidBucketToken = @"dxVQk8gyk3WswArbNhdKIwmwibJ9nFsQhMNUmtIM:ic0-CiQySRLzeeT-qhX1zYC8ElU=:eyJzY29wZSI6InpvbmVfaW52YWxpZCIsImRlYWRsaW5lIjoxNjA3OTk5MzcxLCAicmV0dXJuQm9keSI6IntcImZvb1wiOiQoeDpmb28pLCBcImJhclwiOiQoeDpiYXIpLCBcIm1pbWVUeXBlXCI6JChtaW1lVHlwZSksIFwiaGFzaFwiOiQoZXRhZyksIFwia2V5XCI6JChrZXkpLCBcImZuYW1lXCI6JChmbmFtZSl9In0=";
diff --git a/README.md b/README.md
index ca1aa4eb..26dee05d 100755
--- a/README.md
+++ b/README.md
@@ -13,7 +13,7 @@
 通过 CocoaPods
 
 ```ruby
-pod "Qiniu", "~> 8.0.3" 
+pod "Qiniu", "~> 8.0.4" 
 ```
 
 ## 运行环境