所以我们在这里实现一下实时记录游戏日志的功能。
记录日志，具体记些什么呢？不可能把每一步都记的很清楚，但是我们在开发过程中，每一步可能会打印一些特定的输出，我们就在输出上做一些手脚，把它的每一行都记录下来。
环境：Cocos2d-x quick
if DEBUG_MODE then --把打印的log写入文件 LOG_FILE_NAME = "log_file.txt" BACKUP_LOG_FILE_NAME = "backup_log_file.txt" --如果之前写过文件就把之前的替换成备份 if io.exists(device.writablePath..LOG_FILE_NAME) then --检查之前是否有备份 if io.exists(device.writablePath..BACKUP_LOG_FILE_NAME) then --如果有备份则删掉备份 os.execute("rm "..device.writablePath..BACKUP_LOG_FILE_NAME) end --把之前的文件替换成备份文件 io.open(device.writablePath..BACKUP_LOG_FILE_NAME,'a+') os.execute("mv " .. device.writablePath..LOG_FILE_NAME .. " " .. device.writablePath..BACKUP_LOG_FILE_NAME) end --新建一个新的空文件 print(os.execute("touch "..device.writablePath..LOG_FILE_NAME)) LOG_FILE_PATH = io.open(device.writablePath..LOG_FILE_NAME,'a+') --重写print 让打印的东西能同时写入到文件里 old_print = print print = function (...) old_print(...) --写入 if ... then local args = {...} local s = args[1] if #args > 1 then for i=2,#args do s = s .. " | " .. args[i] end end LOG_FILE_PATH:write(tostring(s).."\n") LOG_FILE_PATH:flush() end end end
记录Log的方法就到此为止了，DEBUG_MODE在开启的时候没写一行print都会向文件里写入一行。
下面说一下上传。
上传我们用了libcurl，因为在iOS和Android的系统中没有集成，所以不能直接调用os.execute(curl xxxxx)，改在C++层进行上传的操作。
新建LogFile.cpp和LogFile.h两个文件
LogFile.cpp
//
// LogFile.cpp
// vegasnights
//
// Created by DonLiu on 16/7/6.
//
//
#include "LogFile.h"
/* parse headers for Content-Length */
size_t LogFile::getcontentlengthfunc(void *ptr,size_t size,size_t nmemb,void *stream)
{
int r;
long len = 0;
/* _snscanf() is Win32 specific */
//r = _snscanf(ptr,size * nmemb,"Content-Length: %ld\n",&len);
r = sscanf((const char*)ptr,&len);
if (r) /* Microsoft: we don't read the specs */
*((long *) stream) = len;
return size * nmemb;
}
/* discard downloaded data */
size_t LogFile::discardfunc(void *ptr,void *stream)
{
return size * nmemb;
}
//write data to upload
size_t LogFile::writefunc(void *ptr,void *stream)
{
return fwrite(ptr,size,nmemb,(FILE*)stream);
}
/* read data to upload */
size_t LogFile::readfunc(void *ptr,void *stream)
{
FILE *f = (FILE*)stream;
size_t n;
if (ferror(f))
return CURL_READFUNC_ABORT;
n = fread(ptr,f) * size;
return n;
}
int LogFile::upload(CURL *curlhandle,const char * remotepath,const char * localpath,const char * userpwd,long timeout,long tries)
{
FILE *f;
long uploaded_len = 0;
CURLcode r = CURLE_GOT_NOTHING;
int c;
f = fopen(localpath,"rb");
if (f == NULL) {
perror(NULL);
return 0;
}
curl_easy_setopt(curlhandle,CURLOPT_UPLOAD,1L);
curl_easy_setopt(curlhandle,CURLOPT_URL,remotepath);
curl_easy_setopt(curlhandle,CURLOPT_USERPWD,userpwd);
curl_easy_setopt(curlhandle,CURLOPT_CONNECTTIMEOUT,1);
if (timeout)
curl_easy_setopt(curlhandle,CURLOPT_FTP_RESPONSE_TIMEOUT,timeout);
curl_easy_setopt(curlhandle,CURLOPT_HEADERFUNCTION,getcontentlengthfunc);
curl_easy_setopt(curlhandle,CURLOPT_HEADERDATA,&uploaded_len);
curl_easy_setopt(curlhandle,CURLOPT_WRITEFUNCTION,discardfunc);
curl_easy_setopt(curlhandle,CURLOPT_READFUNCTION,readfunc);
curl_easy_setopt(curlhandle,CURLOPT_READDATA,f);
curl_easy_setopt(curlhandle,CURLOPT_FTPPORT,"-"); /* disable passive mode */
curl_easy_setopt(curlhandle,CURLOPT_FTP_CREATE_MISSING_DIRS,CURLOPT_VERBOSE,1L);
for (c = 0; (r != CURLE_OK) && (c < tries); c++) {
/* are we resuming? */
if (c) { /* yes */
/* determine the length of the file already written */
/*
* With NOBODY and NOHEADER,libcurl will issue a SIZE
* command,but the only way to retrieve the result is
* to parse the returned Content-Length header. Thus,* getcontentlengthfunc(). We need discardfunc() above
* because HEADER will dump the headers to stdout
* without it.
*/
curl_easy_setopt(curlhandle,CURLOPT_NOBODY,1L);
curl_easy_setopt(curlhandle,CURLOPT_HEADER,1L);
r = curl_easy_perform(curlhandle);
if (r != CURLE_OK)
continue;
curl_easy_setopt(curlhandle,0L);
curl_easy_setopt(curlhandle,0L);
fseek(f,uploaded_len,SEEK_SET);
curl_easy_setopt(curlhandle,CURLOPT_APPEND,1L);
}
else { /* no */
curl_easy_setopt(curlhandle,0L);
}
r = curl_easy_perform(curlhandle);
}
fclose(f);
if (r == CURLE_OK)
return 1;
else {
fprintf(stderr,"%s\n",curl_easy_strerror(r));
return 0;
}
}
// 下载
int LogFile::download(CURL *curlhandle,long tries)
{
FILE *f;
curl_off_t local_file_len = -1 ;
long filesize =0 ;
CURLcode r = CURLE_GOT_NOTHING;
struct stat file_info;
int use_resume = 0;
//获取本地文件大小信息
if(stat(localpath,&file_info) == 0)
{
local_file_len = file_info.st_size;
use_resume = 1;
}
//追加方式打开文件，实现断点续传
f = fopen(localpath,"ab+");
if (f == NULL) {
perror(NULL);
return 0;
}
curl_easy_setopt(curlhandle,userpwd);
//连接超时设置
curl_easy_setopt(curlhandle,timeout);
//设置头处理函数
curl_easy_setopt(curlhandle,&filesize);
// 设置断点续传
curl_easy_setopt(curlhandle,CURLOPT_RESUME_FROM_LARGE,use_resume?local_file_len:0);
curl_easy_setopt(curlhandle,writefunc);
curl_easy_setopt(curlhandle,CURLOPT_WRITEDATA,CURLOPT_NOPROGRESS,1L);
r = curl_easy_perform(curlhandle);
fclose(f);
if (r == CURLE_OK)
return 1;
else {
fprintf(stderr,curl_easy_strerror(r));
return 0;
}
}
void LogFile::lua_upload(const char * remotepath,const char *localpath,const char * userpwd){
CURL *curlhandle = curl_easy_init();
upload(curlhandle,remotepath,localpath,userpwd,1,3);
curl_easy_cleanup(curlhandle);
curl_global_cleanup();
}
LogFile.h:
// // LogFile.hpp // vegasnights // // Created by DonLiu on 16/7/6. // // #ifndef LogFile_hpp #define LogFile_hpp #include <stdlib.h> #include <stdio.h> #include <curl/curl.h> #include <sys/stat.h> class LogFile { public: static size_t getcontentlengthfunc(void *ptr,void *stream); static size_t discardfunc(void *ptr,void *stream); static size_t writefunc(void *ptr,void *stream); static size_t readfunc(void *ptr,void *stream); static int upload(CURL *curlhandle,long tries); static int download(CURL *curlhandle,long tries); static void lua_upload(const char * remotepath,const char * userpwd); }; #endif /* LogFile_hpp */很清爽的一段代码。我把lua_upload这个方法抛到Lua里了，直接调用就好。
