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string sFileName="111.jpg";
std::vector<char> *buffer = response->getResponseData();
char* buf = (char*)malloc(buffer->size());
std::copy(buffer->begin(), buffer->end(), buf);
string aaaa=buf;
CCLOG("string收到图片字节%d",strlen(aaaa.c_str()));
CCLOG("char收到图片字节%d",buffer->size());
FILE *fp = fopen(sFileName.c_str(),"wb+");
fwrite(buf,1,buffer->size(),fp);
fclose(fp);