本文實例為大家分享了C++實現HTTP服務器的相關代碼，供大家參考，具體內容如下
#include <Winsock2.h>#include <windows.h>#include <malloc.h>#include <stdio.h>#include <string.h>#include <time.h> #pragma comment (lib,"ws2_32")#define uPort 80#define MAX_BUFFER 100000#define SENDBLOCK 200000#define SERVERNAME "AcIDSoftWebServer/0.1b"#define FileName "HelloWorld.html" typedef struct _NODE_ { SOCKET s; sockaddr_in Addr; _NODE_* pNext; }Node,*pNode; //多線程處理多個客戶端的連接typedef struct _THREAD_{ DWORD ThreadID; HANDLE hThread; _THREAD_* pNext;}Thread,*pThread; pNode pHead = NULL;pNode pTail = NULL;pThread pHeadThread = NULL;pThread pTailThread = NULL; bool InitSocket();//線程函數DWORD WINAPI AcceptThread(LPVOID lpParam);DWORD WINAPI ClientThread(LPVOID lpParam);bool IoComplete(char* szRequest); //數據包的校驗函數bool AddClientList(SOCKET s,sockaddr_in addr);bool AddThreadList(HANDLE hThread,DWORD ThreadID);bool ParseRequest(char* szRequest, char* szResponse, BOOL &bKeepAlive); //我們存放Html文件的目錄char HtmlDir[512]={0}; void main(){ if (!InitSocket()) { printf("InitSocket Error/n"); return; } GetCurrentDirectory(512,HtmlDir); strcat(HtmlDir,"//HTML//"); strcat(HtmlDir,FileName); //啟動一個接受線程 HANDLE hAcceptThread = CreateThread(NULL,0,AcceptThread,NULL,0,NULL); //在這里我們使用事件模型來實現我們的Web服務器 //創建一個事件 WaitForSingleObject(hAcceptThread,INFINITE);} DWORD WINAPI AcceptThread(LPVOID lpParam) //接收線程{ //創建一個監聽套接字 SOCKET sListen = WSASocket(AF_INET,SOCK_STREAM,0,NULL,0,WSA_FLAG_OVERLAPPED); //使用事件重疊的套接字 if (sListen==INVALID_SOCKET) { printf("Create Listen Error/n"); return -1; } //初始化本服務器的地址 sockaddr_in LocalAddr; LocalAddr.sin_addr.S_un.S_addr = INADDR_ANY; LocalAddr.sin_family = AF_INET; LocalAddr.sin_port = htons(uPort); //綁定套接字 80端口 int Ret = bind(sListen,(sockaddr*)&LocalAddr,sizeof(LocalAddr)); if (Ret==SOCKET_ERROR) { printf("Bind Error/n"); return -1; } //監聽 listen(sListen,5); //創建一個事件 WSAEVENT Event = WSACreateEvent(); if (Event==WSA_INVALID_EVENT) { printf("Create WSAEVENT Error/n"); closesocket(sListen); CloseHandle(Event); //創建事件失敗 關閉套接字 關閉事件 return -1; } //將我們的監聽套接字與我們的事件進行關聯屬性為Accept WSAEventSelect(sListen,Event,FD_ACCEPT); WSANETWORKEVENTS NetWorkEvent; sockaddr_in ClientAddr; int nLen = sizeof(ClientAddr); DWORD dwIndex = 0; while (1) { dwIndex = WSAWaitForMultipleEvents(1,&Event,FALSE,WSA_INFINITE,FALSE); dwIndex = dwIndex - WAIT_OBJECT_0; if (dwIndex==WSA_WAIT_TIMEOUT||dwIndex==WSA_WAIT_FAILED) { continue; } //如果有真正的事件我們就進行判斷 WSAEnumNetworkEvents(sListen,Event,&NetWorkEvent); ResetEvent(&Event); // if (NetWorkEvent.lNetworkEvents == FD_ACCEPT) { if (NetWorkEvent.iErrorCode[FD_ACCEPT_BIT]==0) { //我們要為新的連接進行接受并申請內存存入鏈表中 SOCKET sClient = WSAAccept(sListen, (sockaddr*)&ClientAddr, &nLen, NULL, NULL); if (sClient==INVALID_SOCKET) { continue; } else { //如果接收成功我們要把用戶的所有信息存放到鏈表中 if (!AddClientList(sClient,ClientAddr)) { continue; } } } } } return 0;} DWORD WINAPI ClientThread(LPVOID lpParam){ //我們將每個用戶的信息以參數的形式傳入到該線程 pNode pTemp = (pNode)lpParam; SOCKET sClient = pTemp->s; //這是通信套接字 WSAEVENT Event = WSACreateEvent(); //該事件是與通信套接字關聯以判斷事件的種類 WSANETWORKEVENTS NetWorkEvent; char szRequest[1024]={0}; //請求報文 char szResponse[1024]={0}; //響應報文 BOOL bKeepAlive = FALSE; //是否持續連接 if(Event == WSA_INVALID_EVENT) { return -1; } int Ret = WSAEventSelect(sClient, Event, FD_READ | FD_WRITE | FD_CLOSE); //關聯事件和套接字 DWORD dwIndex = 0; while (1) { dwIndex = WSAWaitForMultipleEvents(1,&Event,FALSE,WSA_INFINITE,FALSE); dwIndex = dwIndex - WAIT_OBJECT_0; if (dwIndex==WSA_WAIT_TIMEOUT||dwIndex==WSA_WAIT_FAILED) { continue; } // 分析什么網絡事件產生 Ret = WSAEnumNetworkEvents(sClient,Event,&NetWorkEvent); //其他情況 if(!NetWorkEvent.lNetworkEvents) { continue; } if (NetWorkEvent.lNetworkEvents & FD_READ) //這里很有意思的 { DWORD NumberOfBytesRecvd; WSABUF Buffers; DWORD dwBufferCount = 1; char szBuffer[MAX_BUFFER]; DWORD Flags = 0; Buffers.buf = szBuffer; Buffers.len = MAX_BUFFER; Ret = WSARecv(sClient,&Buffers,dwBufferCount,&NumberOfBytesRecvd,&Flags,NULL,NULL); //我們在這里要檢測是否得到的完整請求 memcpy(szRequest,szBuffer,NumberOfBytesRecvd); if (!IoComplete(szRequest)) //校驗數據包 { continue; } if (!ParseRequest(szRequest, szResponse, bKeepAlive)) //分析數據包 { //我在這里就進行了簡單的處理 continue; } DWORD NumberOfBytesSent = 0; DWORD dwBytesSent = 0; //發送響應到客戶端 do { Buffers.len = (strlen(szResponse) - dwBytesSent) >= SENDBLOCK ? SENDBLOCK : strlen(szResponse) - dwBytesSent; Buffers.buf = (char*)((DWORD)szResponse + dwBytesSent); Ret = WSASend( sClient, &Buffers, 1, &NumberOfBytesSent, 0, 0, NULL); if(SOCKET_ERROR != Ret) dwBytesSent += NumberOfBytesSent; } while((dwBytesSent < strlen(szResponse)) && SOCKET_ERROR != Ret); } if(NetWorkEvent.lNetworkEvents & FD_CLOSE) { //在這里我沒有處理，我們要將內存進行釋放否則內存泄露 } } return 0;} bool InitSocket(){ WSADATA wsadata; if (WSAStartup(MAKEWORD(2,2),&wsadata)==0) //使用Socket前必須調用 參數 作用 返回值 { return true; } return false;} bool AddClientList(SOCKET s,sockaddr_in addr){ pNode pTemp = (pNode)malloc(sizeof(Node)); HANDLE hThread = NULL; DWORD ThreadID = 0; if (pTemp==NULL) { printf("No Memory/n"); return false; } else { pTemp->s = s; pTemp->Addr = addr; pTemp->pNext = NULL; if (pHead==NULL) { pHead = pTail = pTemp; } else { pTail->pNext = pTemp; pTail = pTail->pNext; } //我們要為用戶開辟新的線程 hThread = CreateThread(NULL,0,ClientThread,(LPVOID)pTemp,0,&ThreadID); if (hThread==NULL) { free(pTemp); return false; } if (!AddThreadList(hThread,ThreadID)) { free(pTemp); return false; } } return true;} bool AddThreadList(HANDLE hThread,DWORD ThreadID){ pThread pTemp = (pThread)malloc(sizeof(Thread)); if (pTemp==NULL) { printf("No Memory/n"); return false; } else { pTemp->hThread = hThread; pTemp->ThreadID = ThreadID; pTemp->pNext = NULL; if (pHeadThread==NULL) { pHeadThread = pTailThread = pTemp; } else { pTailThread->pNext = pTemp; pTailThread = pTailThread->pNext; } } return true;} //校驗數據包bool IoComplete(char* szRequest){ char* pTemp = NULL; //定義臨時空指針 int nLen = strlen(szRequest); //請求數據包長度 pTemp = szRequest; pTemp = pTemp+nLen-4; //定位指針 if (strcmp(pTemp,"/r/n/r/n")==0) //校驗請求頭部行末尾的回車控制符和換行符以及空行 { return true; } return false;} //分析數據包bool ParseRequest(char* szRequest, char* szResponse, BOOL &bKeepAlive){ char* p = NULL; p = szRequest; int n = 0; char* pTemp = strstr(p," "); //判斷字符串str2是否是str1的子串。如果是，則該函數返回str2在str1中首次出現的地址；否則，返回NULL。 n = pTemp - p; //指針長度// pTemp = pTemp + n - 1; //將我們的指針下移 //定義一個臨時的緩沖區來存放我們 char szMode[10]={0}; char szFileName[10]={0}; memcpy(szMode,p,n); //將請求方法拷貝到szMode數組中 if (strcmp(szMode,"GET")==0) //一定要將Get寫成大寫 { //獲取文件名 pTemp = strstr(pTemp," "); pTemp = pTemp + 1; //只有調試的時候才能發現這里的秘密 memcpy(szFileName,pTemp,1); if (strcmp(szFileName,"/")==0) { strcpy(szFileName,FileName); } else { return false; } } else { return false; } // 分析鏈接類型 pTemp = strstr(szRequest,"/nConnection: Keep-Alive"); //協議版本 n = pTemp - p; if (p>0) { bKeepAlive = TRUE; } else //這里的設置是為了Proxy程序的運行 { bKeepAlive = TRUE; } //定義一個回顯頭 char pResponseHeader[512]={0}; char szStatusCode[20]={0}; char szContentType[20]={0}; strcpy(szStatusCode,"200 OK"); strcpy(szContentType,"text/html"); char szDT[128]; struct tm *newtime; long ltime; time(<ime); newtime = gmtime(<ime); strftime(szDT, 128,"%a, %d %b %Y %H:%M:%S GMT", newtime); //讀取文件 //定義一個文件流指針 FILE* fp = fopen(HtmlDir,"rb"); fpos_t lengthActual = 0; int length = 0; char* BufferTemp = NULL; if (fp!=NULL) { // 獲得文件大小 fseek(fp, 0, SEEK_END); fgetpos(fp, &lengthActual); fseek(fp, 0, SEEK_SET); //計算出文件的大小后我們進行分配內存 BufferTemp = (char*)malloc(sizeof(char)*((int)lengthActual)); length = fread(BufferTemp,1,(int)lengthActual,fp); fclose(fp); // 返回響應 sprintf(pResponseHeader, "HTTP/1.0 %s/r/nDate: %s/r/nServer: %s/r/nAccept-Ranges: bytes/r/nContent-Length: %d/r/nConnection: %s/r/nContent-Type: %s/r/n/r/n", szStatusCode, szDT, SERVERNAME, length, bKeepAlive ? "Keep-Alive" : "close", szContentType); //響應報文 } //如果我們的文件沒有找到我們將引導用戶到另外的錯誤頁面 else { } strcpy(szResponse,pResponseHeader); strcat(szResponse,BufferTemp); free(BufferTemp); BufferTemp = NULL; return true;} 以上就是本文的全部內容，希望對大家的學習有所幫助。
