void CMsnADLPayload::ToString(CMsnClient* client, acl::string& out,
const std::list<CMembership*>& memberShips)
{
std::list<MSN_DOMAIN*> domains;
acl::string buf;
// 遍历所有的联系人成员
std::list<CMembership*>::const_iterator cit = memberShips.begin();
for (; cit != memberShips.end(); cit++)
{
const CMembership* memberShip = *cit;
const std::list<Member*>& members = memberShip->GetMembers();
std::list<Member*>::const_iterator cit2 = members.begin();
for (; cit2 != members.end(); cit2++)
AddToDomain(domains, *cit2);
}
buf = "<ml l='1'>";
std::list<MSN_DOMAIN*>::const_iterator cit2 = domains.begin();
for (; cit2 != domains.end(); cit2++)
{
AddXmlNode(buf, *cit2);
if (buf.length() >= 4096)
{
buf << "</ml>";
out << "ADL " << client->Sid()
<< " " << (int) buf.length() << "\r\n";
out.append(buf);
buf = "<ml l='1'>";
}
}
//buf.format_append("<d n='live.com'><c n='support.service' t='32'>"
// "<s l='2' n='IM' /><s l='2' n='PE' /></c></d>");
//buf.format_append("<d n='live.com'><c n='support.service' l='2' t='1'/></d>");
buf << "</ml>";
out << "ADL " << client->Sid() << " " << (int) buf.length() << "\r\n";
out.append(buf);
ClearDomain(domains);
}
bool mem_cache::get(const acl::string& key, acl::string& buf, unsigned short* flags)
{
bool has_tried = false;
buf.clear();
m_line.format("get %s\r\n", key.c_str());
AGAIN:
if (open() == false)
return (false);
if (m_conn->write(m_line) < 0)
{
close();
if (m_retry && !has_tried)
{
has_tried = true;
goto AGAIN;
}
m_ebuf.format("write get(%s) error", key.c_str());
return (false);
}
// 读取服务器响应行
if (m_conn->gets(m_line) == false)
{
close();
if (m_retry && !has_tried)
{
has_tried = true;
goto AGAIN;
}
m_ebuf.format("reply for get(%s) error", key.c_str());
return (false);
}
else if (m_line == "END")
{
m_ebuf.format("not found");
return (false);
}
else if (error_happen(m_line.c_str()))
{
close();
return (false);
}
// VALUE {key} {flags} {bytes}\r\n
ACL_ARGV* tokens = acl_argv_split(m_line.c_str(), " \t");
if (tokens->argc < 4 || strcasecmp(tokens->argv[0], "VALUE") != 0)
{
close();
m_ebuf.format("server error for get(%s)", key.c_str());
acl_argv_free(tokens);
return (false);
}
if (flags)
*flags = (unsigned short) atoi(tokens->argv[2]);
int len = atoi(tokens->argv[3]);
if (len < 0)
{
close();
m_ebuf.format("value's len < 0");
acl_argv_free(tokens);
return (false);
}
else if (len == 0)
{
acl_argv_free(tokens);
return (true);
}
acl_argv_free(tokens);
// 得需要保证足够的空间能容纳读取的数据，该种方式
// 可能会造成数据量非常大时的缓冲区溢出！
char tmp[4096];
int n;
while (true)
{
n = sizeof(tmp);
if (n > len)
n = len;
if ((n = m_conn->read(tmp, n, false)) < 0)
{
close();
m_ebuf.format("read data for get cmd error");
return (false);
}
buf.append(tmp, n);
len -= n;
if (len <= 0)
break;
}
// 读取数据尾部的 "\r\n"
if (m_conn->gets(m_line) == false)
{
close();
m_ebuf.format("read data's delimiter error");
return (false);
}
// 读取 "END\r\n"
if (m_conn->gets(m_line) == false || m_line != "END")
{
close();
m_ebuf.format("END flag not found");
return (false);
}
return (true);
}