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April 18, 2021 20:23
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httpd in c
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| @echo off | |
| IF NOT EXIST .\build mkdir .\build | |
| pushd .\build | |
| cl -nologo -Zi -FC ..\main.cpp Ws2_32.lib | |
| popd |
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| #define WIN32_LEAN_AND_MEAN 1 | |
| #include <windows.h> | |
| #include <winsock2.h> | |
| #include <ws2tcpip.h> | |
| #include <stdint.h> | |
| #include <stdio.h> | |
| typedef int8_t s8; | |
| typedef int16_t s16; | |
| typedef int32_t s32; | |
| typedef int64_t s64; | |
| typedef s32 b32; | |
| typedef uint8_t u8; | |
| typedef uint16_t u16; | |
| typedef uint32_t u32; | |
| typedef uint64_t u64; | |
| typedef float r32; | |
| typedef double r64; | |
| #define DEFAULT_BUFLEN 1024 | |
| char ListenBuffer[DEFAULT_BUFLEN]; | |
| int ListenBufferLen = DEFAULT_BUFLEN; | |
| #define MAX_CLIENT 16 | |
| SOCKET ClientSockets[MAX_CLIENT]; | |
| void Hello(int client) { | |
| char buf[1024]; | |
| sprintf(buf, "HTTP/1.0 200 Ok\r\n"); | |
| send(client, buf, strlen(buf), 0); | |
| sprintf(buf, "Content-Type: text/html\r\n"); | |
| send(client, buf, strlen(buf), 0); | |
| sprintf(buf, "\r\n"); | |
| send(client, buf, strlen(buf), 0); | |
| sprintf(buf, "<HTML><TITLE>Hello world</TITLE>\r\n"); | |
| send(client, buf, strlen(buf), 0); | |
| sprintf(buf, "<BODY><P>Hello\r\n"); | |
| send(client, buf, strlen(buf), 0); | |
| sprintf(buf, "</P></BODY></HTML>\r\n"); | |
| send(client, buf, strlen(buf), 0); | |
| } | |
| int CALLBACK | |
| WinMain(HINSTANCE Instance, | |
| HINSTANCE PrevInstance, | |
| LPSTR CommandLine, | |
| int ShowCode) | |
| { | |
| WSADATA WSAData; | |
| if (WSAStartup(MAKEWORD(2, 2), &WSAData)) { | |
| } | |
| if (LOBYTE(WSAData.wVersion) != 2 && HIBYTE(WSAData.wVersion) != 2) { | |
| } | |
| addrinfo *AddressInfo; | |
| addrinfo AddressInfoHint = {}; | |
| AddressInfoHint.ai_flags = AI_PASSIVE; | |
| AddressInfoHint.ai_family = AF_INET; | |
| AddressInfoHint.ai_socktype = SOCK_STREAM; | |
| AddressInfoHint.ai_protocol = IPPROTO_TCP; | |
| if (getaddrinfo(0, "8888", &AddressInfoHint, &AddressInfo) != 0) { | |
| printf("getaddrinfo failed\n"); | |
| WSACleanup(); | |
| return 1; | |
| } | |
| SOCKET Httpd = socket(AddressInfo->ai_family, AddressInfo->ai_socktype, AddressInfo->ai_protocol); | |
| if (Httpd == INVALID_SOCKET) { | |
| freeaddrinfo(AddressInfo); | |
| WSACleanup(); | |
| return 1; | |
| } | |
| if (bind(Httpd, AddressInfo->ai_addr, (int)AddressInfo->ai_addrlen) == SOCKET_ERROR) { | |
| printf("bind failed with error: %d\n", WSAGetLastError()); | |
| freeaddrinfo(AddressInfo); | |
| closesocket(Httpd); | |
| WSACleanup(); | |
| return 1; | |
| } | |
| freeaddrinfo(AddressInfo); | |
| if (listen(Httpd, SOMAXCONN) == SOCKET_ERROR) { | |
| closesocket(Httpd); | |
| WSACleanup(); | |
| return 1; | |
| } | |
| // note: initialization | |
| for (u32 ClientIndex = 0; ClientIndex < MAX_CLIENT; ++ClientIndex) { | |
| SOCKET *ClientSocket = ClientSockets + ClientIndex; | |
| *ClientSocket = 0; | |
| } | |
| fd_set SocketSet; | |
| for(;;) { | |
| FD_ZERO(&SocketSet); | |
| FD_SET(Httpd, &SocketSet); | |
| int max_sd = Httpd; | |
| // note: find a empty slot | |
| for (u32 ClientIndex = 0; ClientIndex < MAX_CLIENT; ++ClientIndex) { | |
| SOCKET *ClientSocket = ClientSockets + ClientIndex; | |
| if (*ClientSocket > 0) { | |
| FD_SET(*ClientSocket, &SocketSet); | |
| } | |
| if (*ClientSocket > max_sd) { | |
| max_sd = *ClientSocket; | |
| } | |
| } | |
| int Activity = select(max_sd + 1, &SocketSet, 0, 0, 0); | |
| if (Activity != SOCKET_ERROR) { | |
| if (FD_ISSET(Httpd, &SocketSet)) { | |
| SOCKET NewSocket = accept(Httpd, 0, 0); | |
| for (u32 ClientIndex = 0; ClientIndex < MAX_CLIENT; ++ClientIndex) { | |
| SOCKET *ClientSocket = ClientSockets + ClientIndex; | |
| if (*ClientSocket == 0) { | |
| *ClientSocket = NewSocket; | |
| break; | |
| } | |
| } | |
| } | |
| for (u32 ClientIndex = 0; ClientIndex < MAX_CLIENT; ++ClientIndex) { | |
| SOCKET *ClientSocket = ClientSockets + ClientIndex; | |
| if (*ClientSocket != 0 && FD_ISSET(*ClientSocket, &SocketSet)) { | |
| int ListenResult; | |
| do { | |
| ListenResult = recv(*ClientSocket, ListenBuffer, ListenBufferLen, 0); | |
| if (ListenResult > 0) { | |
| Hello(*ClientSocket); | |
| break; | |
| } else if (ListenResult == 0) { | |
| } else { | |
| } | |
| } while (ListenResult > 0); | |
| FD_CLR(*ClientSocket, &SocketSet); | |
| closesocket(*ClientSocket); | |
| *ClientSocket = 0; | |
| } | |
| } | |
| } | |
| } | |
| } |
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todo https://docs.microsoft.com/en-us/windows/win32/winsock/overlapped-i-o-and-event-objects-2