通过使用CocoaLumberjack 和GCDWebServer实现日志NSLog打印的重定向，并且可以使用浏览器访问日志
###CocoaLumberjack数据库存储并在PC端web访问 这个题目存在两个问题：1、使用CocoaLumberjack将文件日志存储在数据库；2、使用PC端使用web访问；那接下来我们分别解决两个问题。 ####1 使用CocoaLumberjack将日志文件存储到数据库 CocoaLumberjack的使用其他的地方都有就不在表述了，详细使用CocoaLumberjack github地址。
CocoaLumberjack的代码的流程，所有的log发送给DDlog对象，运行在自己的GCD队列（GlobalLoggingQueue），之后DDLog会将日志分发到其下注册的一个或多个Logger（并发），每个Logger处理受到的log，此时是在自己的GCD队列（loggerQueue）下操作的，然后分别执行其下的formatter，获取log应有的格式，最终将消息分发到不同的地方。
我们直奔主题，要存数据库，我们看文件目录：
//DDDBLogger.h
#import "DDAbstractDatabaseLogger.h"
@interface DDDBLogger : DDAbstractDatabaseLogger
@property (readwrite, assign) NSInteger saveDBTotalNum;
@end
实现：
#import "DDDBLogger.h"
#import "DBConnect.h"
#import "logSqlModel.h"
@interface DDDBLogger ()
@property (nonatomic, strong) DDLogMessage *saveDBLogMessage;
@end
@implementation DDDBLogger
//设置数据库存储的条数
- (void)setsaveDBTotalNum:(NSUInteger)threshold {
dispatch_block_t block = ^{
@autoreleasepool {
if (_saveDBTotalNum != threshold) {
_saveDBTotalNum = threshold;
}
}
};
//判断是否在自己logger GCD队列中
if ([self isOnInternalLoggerQueue]) {
block();
} else {
dispatch_queue_t globalLoggingQueue = [DDLog loggingQueue];
NSAssert(![self isOnGlobalLoggingQueue], @"Core architecture requirement failure");
dispatch_async(globalLoggingQueue, ^{
dispatch_async(self.loggerQueue, block);
});
}
}
-(instancetype)init
{
self = [super init];
if (self)
{
self.deleteOnEverySave = NO;
self.saveInterval = 1; //1 seconds，1秒发送一次
self.saveThreshold = 1; //每一条就发送
self.saveDBTotalNum = 2000; //数据库总共存2000 条
}
return self;
};
- (BOOL)db_log:(DDLogMessage *)logMessage
{
//没有日志信息
if(!_logFormatter)
{
return NO;
}
_saveDBLogMessage = logMessage;
return YES;
}
- (void)db_save {
if ([self isOnGlobalLoggingQueue]) {
NSAssert(NO, @"db_saveAnddelete should only be executed on the internaLoggerQueue thread, if you are seeing this, your doing it wrong");
}
[self saveLogEntries:self.saveDBLogMessage];
}
-(void)saveLogEntries:(DDLogMessage *)logMessage
{
logSqlModel *logSql = [[logSqlModel alloc] init];
//获取当前的数据库中村的数据的条数
//统计数据库数据条数的sql
NSInteger saveDBNum = [[DBConnect shareConnect] getDBDataCount: logSql.countSqlStr];
NSString *logTimeStr = [self stringFromDate:logMessage.timestamp];
NSString *line = [NSString stringWithFormat:@"%lu", (unsigned long)logMessage.line];
NSString *level = [NSString stringWithFormat:@"%lu", (unsigned long)logMessage.level];
if (_saveDBTotalNum < saveDBNum)
{
//数据库中存储的数据条数 大于 要求存储的条数
//删除的数据条数
NSInteger deleteNum = saveDBNum - _saveDBTotalNum;
NSString *deleteDataSqlStr = [NSString stringWithFormat:@"DELETE FROM logMessageHistory order by lastUpdateTime limit %ld", (long)deleteNum];
[[DBConnect shareConnect] executeUpdateSql:deleteDataSqlStr];
}else if (_saveDBTotalNum > saveDBNum) {
//数据库能保存的数据多余现在的数据，就是直接插入数据库
[[DBConnect shareConnect].dataBase executeUpdate:logSql.insertSqlStr,logTimeStr, logMessage.fileName, line, logMessage.function, logMessage.message, level, logMessage.timestamp];
}
else{
//数据库已经存满，此时需要update时间最早的数据
[[DBConnect shareConnect].dataBase executeUpdate: logSql.updateDataSqlStr,logTimeStr, logMessage.fileName, line, logMessage.function, logMessage.message, level, logMessage.timestamp];
}
}
- (NSString *)stringFromDate:(NSDate *)date{
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateFormat:@"yyyy-MM-dd HH:mm:ss"];
NSString *destDateString = [dateFormatter stringFromDate:date];
return destDateString;
}
@end
我们封装完Logger对象之后，我们需要实现LogFormatter，那么我们的DDDBLogFormatter的声明和实现：
#import <Foundation/Foundation.h>
#import "DDLog.h"
@interface DDDBLogFormatter : NSObject<DDLogFormatter>
@end
实现：
#import "DDDBLogFormatter.h"
@implementation DDDBLogFormatter
//实现代理协议format方法
-(NSString *)formatLogMessage:(DDLogMessage *)logMessage
{
NSMutableDictionary *logDic = [NSMutableDictionary dictionary];
NSString *locationString;
NSArray *parts = [logMessage->_file componentsSeparatedByString:@"/"];
if (parts.count > 0)
{
locationString = [parts lastObject];
}
if (parts.count == 0)
{
locationString = @"no file";
}
logDic[@"gampTech"] = [NSString stringWithFormat:@"%@:%lu(%@):%@", locationString, (unsigned long)logMessage.line, logMessage.function, logMessage.message];
//NSMutableDictionary 转成 NSString
NSError *error;
NSData *outputJsonData = [NSJSONSerialization dataWithJSONObject:logDic options:0 error:&error];
if (error) {
return @"{\"gampTech\":\"error\"}";
}
NSString *outputJsonStr = [[NSString alloc] initWithData:outputJsonData encoding:NSUTF8StringEncoding];
if (outputJsonStr) {
return outputJsonStr;
}
return @"{\"gampTech\":\"error\"}";
}
@end
其中logSqlModel.h是我将sql封装之后的语句demo。 我们在需要CocoaLumberjack的同时还需要FMDB和GCDWebserver，前者数据库存储，后者建立网络访问。 ####2 PC端通过网络访问 在本地资源文件bundle中创建一个html,此HTML是返回的界面。
<!doctype html>
<html>
<head>
<script src="http://code.angularjs.org/angular-1.0.1.min.js"></script>
</head>
<body ng-app="myApp" ng-controller="mainCtrl">
<button ng-click="refresh()">refresh</button>
<div style="background: #07242E; color: #708284;height: auto;overflow: auto;min-height: 600px;max-height:700px" >
<ul>
<li ng-repeat="x in items" style='font-size:15px'>
{{ x.logtime }} [{{x.level}}]-{{x.filename}}:{{x.line}}/{{x.function}} => {{x.message}}
</li>
</ul>
</div>
<script>
var app = angular.module('myApp', []);
app.controller('mainCtrl', function($scope, $http) {
$http.get(location+'logs').success(function(response) {
$scope.items = response;
});
$scope.refresh = function(){
$http.get(location+'logs').success(function(response){
$scope.items = response;
});
};
});
</script>
</body>
</html>
接下来我们看GCDWebServer的调用本地方法列表：
#import <Foundation/Foundation.h>
@interface ExLogger : NSObject
+(void)prepare;
+(BOOL)startService;
+(void)stopService;
+(BOOL)isStarted;
@end
实现：
#import "ExLogger.h"
#import "GCDWebServer.h"
#import "GCDWebServerDataResponse.h"
@implementation ExLogger
static BOOL isStarted;
static GCDWebServer *_webServer;
+(void)prepare{
//TODO 初始化DDLog
[DDLog addLogger:[DDTTYLogger sharedInstance]];
//声明我们自己的Logger
DDDBLogger *logger = [[DDDBLogger alloc] init];
[logger setLogFormatter:[DDDBLogFormatter new]];
[logger setSaveDBTotalNum:2000];
[DDLog addLogger:logger];
//捕获异常数据
NSSetUncaughtExceptionHandler(&uncaughtExceptionHandler);
}
//从数据库查询日志
+(NSArray*)logsFromDB{
logSqlModel *logSql = [[logSqlModel alloc] init];
return [[DBConnect shareConnect] getDBlist:logSql.queryDataSqlStr];
}
+(BOOL)startService{
NSLog(@"start service! _webserver=%@",_webServer);
if (isStarted) {
return NO;
}
if(!_webServer)
_webServer = [[GCDWebServer alloc] init];
//首页请求
[_webServer addDefaultHandlerForMethod:@"GET" requestClass:[GCDWebServerRequest class] processBlock:^GCDWebServerResponse*(GCDWebServerRequest *request){
NSError *err;
NSString *path = [[NSBundle mainBundle].resourcePath stringByAppendingFormat:@"/%@/template.html", kBundleName];
NSLog(@"path:%@",path);
GCDWebServerResponse *response = [GCDWebServerDataResponse responseWithHTML:[NSString stringWithContentsOfFile:path encoding:NSUTF8StringEncoding error:&err]];
return response;
}];
//点击refresh按钮时请求日志数据
[_webServer addHandlerForMethod:@"GET" path:@"/logs" requestClass:[GCDWebServerRequest class] processBlock:^GCDWebServerResponse*(GCDWebServerRequest *request){
NSArray *array = [self logsFromDB];
return [GCDWebServerDataResponse responseWithJSONObject:array];
}];
isStarted = [_webServer startWithPort:8089 bonjourName:nil];
return isStarted;
}
+(void)stopService{
[_webServer stop];
[DDLog removeAllLoggers];
isStarted= NO;
_webServer = nil;
}
+(BOOL)isStarted{
return isStarted;
}
@end
此时我们就可以在手机的IP加上端口8089，在PC端查看。 (我的demo地址)[https://github.com/yanduhantan563/CocoaLogToWebServer]
-> CocoaLogToWebServer (1.0.0)
通过使用CocoaLumberjack 和GCDWebServer实现日志NSLog打印的重定向，并且可以使用浏览器访问日志
pod 'CocoaLogToWebServer', '~> 1.0.0'
- Homepage: https://github.com/yanduhantan563/CocoaLogToWebServer
- Source: https://github.com/yanduhantan563/CocoaLogToWebServer.git
- Versions: 1.0.0 [master repo]