476 lines
14 KiB
C
476 lines
14 KiB
C
/*
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* tinyhttpd tiny http server
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*
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* @build make examples
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*
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* @server bin/tinyhttpd 8000
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*
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* @client bin/curl -v http://127.0.0.1:8000/
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* bin/curl -v http://127.0.0.1:8000/ping
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* bin/curl -v http://127.0.0.1:8000/echo -d "hello,world!"
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*
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* @webbench bin/wrk http://127.0.0.1:8000/ping
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*
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*/
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#include "hv.h"
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#include "hloop.h"
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/*
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* workflow:
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* hloop_new -> hloop_create_tcp_server -> hloop_run ->
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* on_accept -> HV_ALLOC(http_conn_t) -> hio_readline ->
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* on_recv -> parse_http_request_line -> hio_readline ->
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* on_recv -> parse_http_head -> ... -> hio_readbytes(content_length) ->
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* on_recv -> on_request -> http_reply-> hio_write -> hio_close ->
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* on_close -> HV_FREE(http_conn_t)
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*
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*/
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static const char* host = "0.0.0.0";
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static int port = 8000;
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static int thread_num = 1;
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static hloop_t* accept_loop = NULL;
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static hloop_t** worker_loops = NULL;
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#define HTTP_KEEPALIVE_TIMEOUT 60000 // ms
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#define HTTP_MAX_URL_LENGTH 256
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#define HTTP_MAX_HEAD_LENGTH 1024
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#define HTML_TAG_BEGIN "<html><body><center><h1>"
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#define HTML_TAG_END "</h1></center></body></html>"
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// status_message
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#define HTTP_OK "OK"
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#define NOT_FOUND "Not Found"
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#define NOT_IMPLEMENTED "Not Implemented"
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// Content-Type
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#define TEXT_PLAIN "text/plain"
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#define TEXT_HTML "text/html"
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typedef enum {
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s_begin,
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s_first_line,
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s_request_line = s_first_line,
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s_status_line = s_first_line,
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s_head,
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s_head_end,
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s_body,
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s_end
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} http_state_e;
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typedef struct {
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// first line
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int major_version;
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int minor_version;
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union {
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// request line
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struct {
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char method[32];
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char path[HTTP_MAX_URL_LENGTH];
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};
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// status line
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struct {
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int status_code;
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char status_message[64];
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};
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};
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// headers
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char host[64];
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int content_length;
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char content_type[64];
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unsigned keepalive: 1;
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// char head[HTTP_MAX_HEAD_LENGTH];
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// int head_len;
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// body
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char* body;
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int body_len; // body_len = content_length
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} http_msg_t;
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typedef struct {
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hio_t* io;
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http_state_e state;
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http_msg_t request;
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http_msg_t response;
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// for http_serve_file
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FILE* fp;
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hbuf_t filebuf;
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} http_conn_t;
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static char s_date[32] = {0};
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static void update_date(htimer_t* timer) {
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uint64_t now = hloop_now(hevent_loop(timer));
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gmtime_fmt(now, s_date);
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}
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static int http_response_dump(http_msg_t* msg, char* buf, int len) {
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int offset = 0;
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// status line
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offset += snprintf(buf + offset, len - offset, "HTTP/%d.%d %d %s\r\n", msg->major_version, msg->minor_version, msg->status_code, msg->status_message);
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// headers
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offset += snprintf(buf + offset, len - offset, "Server: libhv/%s\r\n", hv_version());
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offset += snprintf(buf + offset, len - offset, "Connection: %s\r\n", msg->keepalive ? "keep-alive" : "close");
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if (msg->content_length > 0) {
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offset += snprintf(buf + offset, len - offset, "Content-Length: %d\r\n", msg->content_length);
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}
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if (*msg->content_type) {
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offset += snprintf(buf + offset, len - offset, "Content-Type: %s\r\n", msg->content_type);
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}
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if (*s_date) {
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offset += snprintf(buf + offset, len - offset, "Date: %s\r\n", s_date);
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}
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// TODO: Add your headers
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offset += snprintf(buf + offset, len - offset, "\r\n");
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// body
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if (msg->body && msg->content_length > 0) {
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memcpy(buf + offset, msg->body, msg->content_length);
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offset += msg->content_length;
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}
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return offset;
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}
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static int http_reply(http_conn_t* conn,
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int status_code, const char* status_message,
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const char* content_type,
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const char* body, int body_len) {
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http_msg_t* req = &conn->request;
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http_msg_t* resp = &conn->response;
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resp->major_version = req->major_version;
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resp->minor_version = req->minor_version;
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resp->status_code = status_code;
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if (status_message) strncpy(resp->status_message, status_message, sizeof(req->status_message) - 1);
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if (content_type) strncpy(resp->content_type, content_type, sizeof(req->content_type) - 1);
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resp->keepalive = req->keepalive;
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if (body) {
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if (body_len <= 0) body_len = strlen(body);
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resp->content_length = body_len;
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resp->body = (char*)body;
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}
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char* buf = NULL;
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STACK_OR_HEAP_ALLOC(buf, HTTP_MAX_HEAD_LENGTH + resp->content_length, HTTP_MAX_HEAD_LENGTH + 1024);
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int msglen = http_response_dump(resp, buf, HTTP_MAX_HEAD_LENGTH + resp->content_length);
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int nwrite = hio_write(conn->io, buf, msglen);
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STACK_OR_HEAP_FREE(buf);
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return nwrite < 0 ? nwrite : msglen;
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}
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static void http_send_file(http_conn_t* conn) {
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if (!conn || !conn->fp) return;
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// alloc filebuf
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if (!conn->filebuf.base) {
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conn->filebuf.len = 4096;
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HV_ALLOC(conn->filebuf, conn->filebuf.len);
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}
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char* filebuf = conn->filebuf.base;
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size_t filebuflen = conn->filebuf.len;
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// read file
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int nread = fread(filebuf, 1, filebuflen, conn->fp);
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if (nread <= 0) {
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// eof or error
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hio_close(conn->io);
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return;
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}
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// send file
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hio_write(conn->io, filebuf, nread);
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}
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static void on_write(hio_t* io, const void* buf, int writebytes) {
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if (!io) return;
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if (!hio_write_is_complete(io)) return;
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http_conn_t* conn = (http_conn_t*)hevent_userdata(io);
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http_send_file(conn);
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}
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static int http_serve_file(http_conn_t* conn) {
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http_msg_t* req = &conn->request;
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http_msg_t* resp = &conn->response;
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// GET / HTTP/1.1\r\n
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const char* filepath = req->path + 1;
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// homepage
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if (*filepath == '\0') {
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filepath = "index.html";
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}
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// open file
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conn->fp = fopen(filepath, "rb");
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if (!conn->fp) {
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http_reply(conn, 404, NOT_FOUND, TEXT_HTML, HTML_TAG_BEGIN NOT_FOUND HTML_TAG_END, 0);
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return 404;
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}
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// send head
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size_t filesize = hv_filesize(filepath);
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resp->content_length = filesize;
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const char* suffix = hv_suffixname(filepath);
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const char* content_type = NULL;
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if (strcmp(suffix, "html") == 0) {
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content_type = TEXT_HTML;
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} else {
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// TODO: set content_type by suffix
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}
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hio_setcb_write(conn->io, on_write);
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int nwrite = http_reply(conn, 200, "OK", content_type, NULL, 0);
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if (nwrite < 0) return nwrite; // disconnected
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return 200;
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}
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static bool parse_http_request_line(http_conn_t* conn, char* buf, int len) {
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// GET / HTTP/1.1
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http_msg_t* req = &conn->request;
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sscanf(buf, "%s %s HTTP/%d.%d", req->method, req->path, &req->major_version, &req->minor_version);
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if (req->major_version != 1) return false;
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if (req->minor_version == 1) req->keepalive = 1;
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// printf("%s %s HTTP/%d.%d\r\n", req->method, req->path, req->major_version, req->minor_version);
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return true;
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}
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static bool parse_http_head(http_conn_t* conn, char* buf, int len) {
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http_msg_t* req = &conn->request;
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// Content-Type: text/html
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const char* key = buf;
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const char* val = buf;
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char* delim = strchr(buf, ':');
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if (!delim) return false;
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*delim = '\0';
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val = delim + 1;
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// trim space
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while (*val == ' ') ++val;
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// printf("%s: %s\r\n", key, val);
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if (stricmp(key, "Content-Length") == 0) {
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req->content_length = atoi(val);
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} else if (stricmp(key, "Content-Type") == 0) {
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strncpy(req->content_type, val, sizeof(req->content_type) - 1);
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} else if (stricmp(key, "Connection") == 0) {
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if (stricmp(val, "close") == 0) {
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req->keepalive = 0;
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}
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} else {
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// TODO: save other head
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}
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return true;
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}
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static int on_request(http_conn_t* conn) {
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http_msg_t* req = &conn->request;
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// TODO: router
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if (strcmp(req->method, "GET") == 0) {
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// GET /ping HTTP/1.1\r\n
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if (strcmp(req->path, "/ping") == 0) {
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http_reply(conn, 200, "OK", TEXT_PLAIN, "pong", 4);
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return 200;
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} else {
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// TODO: Add handler for your path
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}
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return http_serve_file(conn);
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} else if (strcmp(req->method, "POST") == 0) {
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// POST /echo HTTP/1.1\r\n
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if (strcmp(req->path, "/echo") == 0) {
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http_reply(conn, 200, "OK", req->content_type, req->body, req->content_length);
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return 200;
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} else {
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// TODO: Add handler for your path
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}
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} else {
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// TODO: handle other method
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}
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http_reply(conn, 501, NOT_IMPLEMENTED, TEXT_HTML, HTML_TAG_BEGIN NOT_IMPLEMENTED HTML_TAG_END, 0);
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return 501;
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}
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static void on_close(hio_t* io) {
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// printf("on_close fd=%d error=%d\n", hio_fd(io), hio_error(io));
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http_conn_t* conn = (http_conn_t*)hevent_userdata(io);
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if (conn) {
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if (conn->fp) {
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// close file
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fclose(conn->fp);
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conn->fp = NULL;
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}
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// free filebuf
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HV_FREE(conn->filebuf.base);
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HV_FREE(conn);
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hevent_set_userdata(io, NULL);
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}
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}
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static void on_recv(hio_t* io, void* buf, int readbytes) {
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char* str = (char*)buf;
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// printf("on_recv fd=%d readbytes=%d\n", hio_fd(io), readbytes);
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// printf("%.*s", readbytes, str);
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http_conn_t* conn = (http_conn_t*)hevent_userdata(io);
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http_msg_t* req = &conn->request;
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switch (conn->state) {
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case s_begin:
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// printf("s_begin");
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conn->state = s_first_line;
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case s_first_line:
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// printf("s_first_line\n");
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if (readbytes < 2) {
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fprintf(stderr, "Not match \r\n!");
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hio_close(io);
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return;
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}
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str[readbytes - 2] = '\0';
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if (parse_http_request_line(conn, str, readbytes - 2) == false) {
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fprintf(stderr, "Failed to parse http request line:\n%s\n", str);
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hio_close(io);
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return;
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}
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// start read head
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conn->state = s_head;
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hio_readline(io);
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break;
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case s_head:
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// printf("s_head\n");
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if (readbytes < 2) {
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fprintf(stderr, "Not match \r\n!");
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hio_close(io);
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return;
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}
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if (readbytes == 2 && str[0] == '\r' && str[1] == '\n') {
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conn->state = s_head_end;
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} else {
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str[readbytes - 2] = '\0';
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if (parse_http_head(conn, str, readbytes - 2) == false) {
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fprintf(stderr, "Failed to parse http head:\n%s\n", str);
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hio_close(io);
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return;
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}
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hio_readline(io);
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break;
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}
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case s_head_end:
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// printf("s_head_end\n");
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if (req->content_length == 0) {
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conn->state = s_end;
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goto s_end;
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} else {
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// start read body
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conn->state = s_body;
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// WARN: too large content_length should read multiple times!
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hio_readbytes(io, req->content_length);
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break;
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}
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case s_body:
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// printf("s_body\n");
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req->body = str;
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req->body_len += readbytes;
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if (req->body_len == req->content_length) {
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conn->state = s_end;
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} else {
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// WARN: too large content_length should be handled by streaming!
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break;
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}
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case s_end:
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s_end:
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// printf("s_end\n");
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// received complete request
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on_request(conn);
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if (hio_is_closed(io)) return;
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if (req->keepalive) {
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// Connection: keep-alive\r\n
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// reset and receive next request
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memset(&conn->request, 0, sizeof(http_msg_t));
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memset(&conn->response, 0, sizeof(http_msg_t));
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conn->state = s_first_line;
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hio_readline(io);
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} else {
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// Connection: close\r\n
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hio_close(io);
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}
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break;
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default: break;
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}
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}
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static void new_conn_event(hevent_t* ev) {
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hloop_t* loop = ev->loop;
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hio_t* io = (hio_t*)hevent_userdata(ev);
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hio_attach(loop, io);
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/*
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char localaddrstr[SOCKADDR_STRLEN] = {0};
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char peeraddrstr[SOCKADDR_STRLEN] = {0};
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printf("tid=%ld connfd=%d [%s] <= [%s]\n",
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(long)hv_gettid(),
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(int)hio_fd(io),
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SOCKADDR_STR(hio_localaddr(io), localaddrstr),
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SOCKADDR_STR(hio_peeraddr(io), peeraddrstr));
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*/
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hio_setcb_close(io, on_close);
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hio_setcb_read(io, on_recv);
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hio_set_keepalive_timeout(io, HTTP_KEEPALIVE_TIMEOUT);
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http_conn_t* conn = NULL;
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HV_ALLOC_SIZEOF(conn);
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conn->io = io;
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hevent_set_userdata(io, conn);
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// start read first line
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conn->state = s_first_line;
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hio_readline(io);
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}
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static hloop_t* get_next_loop() {
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static int s_cur_index = 0;
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if (s_cur_index == thread_num) {
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s_cur_index = 0;
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}
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return worker_loops[s_cur_index++];
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}
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static void on_accept(hio_t* io) {
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hio_detach(io);
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hloop_t* worker_loop = get_next_loop();
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hevent_t ev;
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memset(&ev, 0, sizeof(ev));
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ev.loop = worker_loop;
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ev.cb = new_conn_event;
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ev.userdata = io;
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hloop_post_event(worker_loop, &ev);
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}
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static HTHREAD_ROUTINE(worker_thread) {
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hloop_t* loop = (hloop_t*)userdata;
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hloop_run(loop);
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return 0;
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}
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static HTHREAD_ROUTINE(accept_thread) {
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hloop_t* loop = (hloop_t*)userdata;
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hio_t* listenio = hloop_create_tcp_server(loop, host, port, on_accept);
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if (listenio == NULL) {
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exit(1);
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}
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printf("tinyhttpd listening on %s:%d, listenfd=%d, thread_num=%d\n",
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host, port, hio_fd(listenio), thread_num);
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// NOTE: add timer to update date every 1s
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htimer_add(loop, update_date, 1000, INFINITE);
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hloop_run(loop);
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return 0;
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}
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int main(int argc, char** argv) {
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if (argc < 2) {
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printf("Usage: %s port [thread_num]\n", argv[0]);
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return -10;
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}
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port = atoi(argv[1]);
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if (argc > 2) {
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thread_num = atoi(argv[2]);
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} else {
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thread_num = get_ncpu();
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}
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if (thread_num == 0) thread_num = 1;
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worker_loops = (hloop_t**)malloc(sizeof(hloop_t*) * thread_num);
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for (int i = 0; i < thread_num; ++i) {
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worker_loops[i] = hloop_new(HLOOP_FLAG_AUTO_FREE);
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hthread_create(worker_thread, worker_loops[i]);
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}
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accept_loop = hloop_new(HLOOP_FLAG_AUTO_FREE);
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accept_thread(accept_loop);
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return 0;
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}
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