From fe3e29e1f0a80c7795bafb877dbcc84752d153eb Mon Sep 17 00:00:00 2001
From: longbai <slongbai@gmail.com>
Date: Sat, 9 Aug 2014 11:14:29 +0800
Subject: [PATCH] add client id

---
 QiniuSDK/QiniuUtils.m | 15 +++++++++++++--
 1 file changed, 13 insertions(+), 2 deletions(-)

diff --git a/QiniuSDK/QiniuUtils.m b/QiniuSDK/QiniuUtils.m
index d7a9603..f35216d 100644
--- a/QiniuSDK/QiniuUtils.m
+++ b/QiniuSDK/QiniuUtils.m
@@ -41,12 +41,23 @@
     return [NSError errorWithDomain:kQiniuErrorDomain code:errorCode userInfo:userInfo];
 }
 
+static NSString* clientId(){
+    long long now_timestamp = [[NSDate date] timeIntervalSince1970]*1000;
+    int r = arc4random()%1000;
+    return [NSString stringWithFormat:@"%lld%u", now_timestamp, r];
+}
+
+static NSString* _clientId = nil;
+
 NSString *qiniuUserAgent() {
-    return  [NSString stringWithFormat:@"Qiniu-iOS/%@ (%@; iOS %@; )", kQiniuVersion, [[UIDevice currentDevice] model], [[UIDevice currentDevice] systemVersion]];
+    if (_clientId == nil){
+        _clientId = clientId();
+    }
+    return  [NSString stringWithFormat:@"Qiniu-iOS/%@ (%@; iOS %@; %@)", kQiniuVersion, [[UIDevice currentDevice] model], [[UIDevice currentDevice] systemVersion], _clientId];
 }
 
 BOOL isRetryHost(AFHTTPRequestOperation *operation) {
-    
+
     NSInteger errorCode = [operation.response statusCode];
 
     if (errorCode / 100 == 4 || errorCode / 100 == 6 || errorCode / 100 == 7) {