比特币源码阅读(HTTPReq_JSONRPC的注册和实现)

1.注册处理RPC请求的函数的堆栈

1.1.AppInit函数

src/bitcoind.cpp

static bool AppInit(int argc, char* argv[])
{
  fRet = AppInitMain();
}

1.2.AppInitMain函数

src/init.cpp

bool AppInitMain()
{
   RegisterAllCoreRPCCommands(tableRPC);
   if (!AppInitServers())
            return InitError(_("Unable to start HTTP server. See debug log for details."));
}

1.3.AppInitServers函数

src/init.cpp

static bool AppInitServers()
{
    if (!StartHTTPRPC())
        return false;
}

1.4.注册处理RPC请求的函数

src/httprpc.cpp

bool StartHTTPRPC()
{
    LogPrint(BCLog::RPC, "Starting HTTP RPC server\n");
    if (!InitRPCAuthentication())
        return false;

    RegisterHTTPHandler("/", true, HTTPReq_JSONRPC);  //注册处理RPC请求的函数
#ifdef ENABLE_WALLET
    // ifdef can be removed once we switch to better endpoint support and API versioning
    RegisterHTTPHandler("/wallet/", false, HTTPReq_JSONRPC);
#endif
    assert(EventBase());
    httpRPCTimerInterface = MakeUnique(EventBase());
    RPCSetTimerInterface(httpRPCTimerInterface.get());
    return true;
}

2.对RPC命令的处理

src/httprpc.cpp

static bool HTTPReq_JSONRPC(HTTPRequest* req, const std::string &)
{
  jreq.parse(valRequest);
  UniValue result = tableRPC.execute(jreq);  //执行CRPCTable的execute函数
}