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tinyhttpd-windows.cpp
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tinyhttpd-windows.cpp
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#ifndef WIN32_LEAN_AND_MEAN
#define WIN32_LEAN_AND_MEAN
#endif
#include <stdio.h>
#include <ctype.h>
#include <string.h>
#include <stdlib.h>
#include <stdint.h>
#include <winsock2.h>
#include <ws2tcpip.h>
#include <Windows.h>
#include <iphlpapi.h>
#include <io.h>
#define ISspace(x) isspace((int)(x))
#pragma comment(lib, "Ws2_32.lib")
#define SERVER_STRING "Server: jdbhttpd-windows/0.1.0\r\n"
void accept_request(SOCKET);
void cat(SOCKET, FILE *);
void error_die(const char *);
int get_line(SOCKET, char *, int);
void headers(SOCKET, const char *);
void not_found(SOCKET);
void server_file(SOCKET, const char *);
SOCKET startup(const char *);
void unimplemented(SOCKET);
void accept_request(SOCKET client_socket) {
SOCKET client = client_socket;
int numchars = 0;
size_t i, j;
char buf[1024];
char method[255];
char url[255];
char path[512];
int iResult;
numchars = get_line(client, buf, sizeof(buf));
i = 0;
j = 0;
while (!ISspace(buf[i]) && (i < sizeof(method) - 1)) {
method[i] = buf[i];
i++;
}
j = i;
method[i] = '\0';
if (_stricmp(method, "get") && _stricmp(method, "post")) {
unimplemented(client);
return;
}
i = 0;
while (ISspace(buf[j]) && (j < numchars)) {
j++;
}
while (!ISspace(buf[j]) && (i < sizeof(url) - 1) && (j < numchars)) {
url[i] = buf[j];
i++;
j++;
}
url[i] = '\0';
sprintf_s(path, "htdocs%s", url);
if (path[strlen(path) - 1] == '/') {
strcat_s(path, "index.html");
}
if (!_access(path, 0)) {
server_file(client,path);
} else {
not_found(client);
}
iResult = shutdown(client, SD_SEND);
if (iResult == SOCKET_ERROR) {
closesocket(client);
WSACleanup();
error_die("shutdown failed with error\n");
}
closesocket(client);
}
void cat(SOCKET client, FILE *resource) {
char buf[1024];
while (!feof(resource)) {
fgets(buf, sizeof(buf), resource);
send(client, buf, strlen(buf), 0);
}
}
void error_die(const char *sc)
{
perror(sc);
exit(1);
}
int get_line(SOCKET sock, char *buf, int size) {
int i = 0;
char c = '\0';
int n;
while ((i < size - 1) && (c != '\n')) {
n = recv(sock, &c, 1, 0);
if (n > 0) {
if (c == '\r') {
n = recv(sock, &c, 1, MSG_PEEK);
if ((n > 0) && (c == '\n')) {
recv(sock, &c, 1, 0);
}
else {
c = '\n';
}
}
buf[i] = c;
i++;
}
else
c = '\n';
}
buf[i] = '\0';
return i;
}
void headers(SOCKET client, const char *filename) {
char buf[1024];
strcpy_s(buf, "HTTP/1.0 200 OK\r\n");
send(client, buf, strlen(buf), 0);
strcpy_s(buf, SERVER_STRING);
send(client, buf, strlen(buf), 0);
strcpy_s(buf, "Content-Type: text/html\r\n");
send(client, buf, strlen(buf), 0);
strcpy_s(buf, "\r\n");
send(client, buf, strlen(buf), 0);
}
void not_found(SOCKET client) {
char buf[1024];
strcpy_s(buf, "HTTP/1.0 404 NOT FOUND\r\n");
send(client, buf, strlen(buf), 0);
strcpy_s(buf, SERVER_STRING);
send(client, buf, strlen(buf), 0);
strcpy_s(buf, "Content-Type: text/html\r\n");
send(client, buf, strlen(buf), 0);
strcpy_s(buf, "\r\n");
send(client, buf, strlen(buf), 0);
strcpy_s(buf, "<HTML><TITLE>Not Found</TITLE>\r\n");
send(client, buf, strlen(buf), 0);
strcpy_s(buf, "<BODY><P>The server could not fulfill\r\n");
send(client, buf, strlen(buf), 0);
strcpy_s(buf, "your request because the resource specified\r\n");
send(client, buf, strlen(buf), 0);
strcpy_s(buf, "is unavailable or nonexistent.\r\n");
send(client, buf, strlen(buf), 0);
strcpy_s(buf, "</BODY></HTML>\r\n");
send(client, buf, strlen(buf), 0);
}
void server_file(SOCKET client, const char *filename) {
FILE *resource = NULL;
int numchars = 1;
char buf[1024];
buf[0] = 'A';
buf[1] = '\0';
while ((numchars > 0) && strcmp("\n", buf)) {
numchars = get_line(client, buf, sizeof(buf));
}
fopen_s(&resource,filename, "r");
if (resource == NULL) {
not_found(client);
} else {
headers(client, filename);
cat(client, resource);
}
fclose(resource);
}
SOCKET startup(char *port) {
SOCKET httpd = INVALID_SOCKET;
//initialize winsock
WSADATA wsaData;
int iResult;
iResult = WSAStartup(MAKEWORD(2, 2), &wsaData);
if (iResult != 0) {
error_die("WSAStartup failed\n");
}
struct addrinfo *result = NULL, *ptr = NULL, hints;
ZeroMemory(&hints, sizeof(hints));
hints.ai_family = AF_INET;
hints.ai_socktype = SOCK_STREAM;
hints.ai_protocol = IPPROTO_TCP;
hints.ai_flags = AI_PASSIVE;
iResult = getaddrinfo(NULL, port, &hints, &result);
if (iResult != 0) {
WSACleanup();
error_die("getaddrinfo failed:\n");
}
httpd = socket(result->ai_family, result->ai_socktype, result->ai_protocol);
if (httpd == INVALID_SOCKET) {
freeaddrinfo(result);
WSACleanup();
error_die("Error at socket()\n");
}
iResult = bind(httpd, result->ai_addr, (int)result->ai_addrlen);
if (iResult == SOCKET_ERROR) {
freeaddrinfo(result);
closesocket(httpd);
WSACleanup();
error_die("bind failed with error\n");
}
if (listen(httpd, SOMAXCONN) == SOCKET_ERROR) {
closesocket(httpd);
WSACleanup();
error_die("Listen failed with error\n");
}
return httpd;
}
void unimplemented(SOCKET client)
{
char buf[1024];
strcpy_s(buf, "HTTP/1.0 501 Method Not Implemented\r\n");
send(client, buf, strlen(buf), 0);
strcpy_s(buf, SERVER_STRING);
send(client, buf, strlen(buf), 0);
strcpy_s(buf, "Content-Type: text/html\r\n");
send(client, buf, strlen(buf), 0);
strcpy_s(buf, "\r\n");
send(client, buf, strlen(buf), 0);
strcpy_s(buf, "<HTML><HEAD><TITLE>Method Not Implemented\r\n");
send(client, buf, strlen(buf), 0);
strcpy_s(buf, "</TITLE></HEAD>\r\n");
send(client, buf, strlen(buf), 0);
strcpy_s(buf, "<BODY><P>HTTP request method not supported.\r\n");
send(client, buf, strlen(buf), 0);
strcpy_s(buf, "</BODY></HTML>\r\n");
send(client, buf, strlen(buf), 0);
}
int main(void) {
SOCKET server_sock = INVALID_SOCKET;
char port[] = "4000";
SOCKET client_sock = INVALID_SOCKET;
server_sock = startup(port);
printf("httpd running on port %s\n", port);
while (true) {
client_sock = accept(server_sock, NULL, NULL);
if (client_sock == INVALID_SOCKET) {
printf("accept failed:%d\n", WSAGetLastError());
closesocket(server_sock);
WSACleanup();
return 1;
}
accept_request(client_sock);
}
closesocket(server_sock);
WSACleanup();
return 0;
}