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Files
nxdk/samples/httpd/httpserver.c
2019-03-19 07:47:26 +01:00

130 lines
3.8 KiB
C

#include "lwip/opt.h"
#include "lwip/arch.h"
#include "lwip/api.h"
#include "httpserver.h"
#include <string.h>
#include <hal/xbox.h>
#if LWIP_NETCONN
#ifndef HTTPD_DEBUG
#define HTTPD_DEBUG LWIP_DBG_OFF
#endif
static const char http_html_hdr[] = "HTTP/1.1 200 OK\r\nContent-type: text/html\r\n\r\n";
static const char http_index_html[] = "<html><head><title>Congrats!</title></head><body><h1>Welcome to our lwIP HTTP server!</h1><p>This is a small test page, served by httpserver-netconn.<hr /><a href=\"/quit\">Restart</a></body></html>";
static const char http_quit_html[] = "<html><head><title>Restarting...</title></head><body>Restarting...</body></html>";
static void http_server_serve_index(struct netconn *conn)
{
/* Send the HTML header
* subtract 1 from the size, since we dont send the \0 in the string
* NETCONN_NOCOPY: our data is const static, so no need to copy it
*/
netconn_write(conn, http_html_hdr, sizeof(http_html_hdr)-1, NETCONN_NOCOPY);
/* Send our HTML page */
netconn_write(conn, http_index_html, sizeof(http_index_html)-1, NETCONN_NOCOPY);
}
static void http_server_serve_quit(struct netconn *conn)
{
netconn_write(conn, http_html_hdr, sizeof(http_html_hdr)-1, NETCONN_NOCOPY);
netconn_write(conn, http_quit_html, sizeof(http_quit_html)-1, NETCONN_NOCOPY);
}
/** Serve one HTTP connection accepted in the http thread */
static void
http_server_netconn_serve(struct netconn *conn)
{
struct netbuf *inbuf;
char *buf;
u16_t buflen;
err_t err;
ip_addr_t naddr;
u16_t port = 0;
/* Read the data from the port, blocking if nothing yet there.
We assume the request (the part we care about) is in one netbuf */
err = netconn_recv(conn, &inbuf);
if (err == ERR_OK) {
netbuf_data(inbuf, (void**)&buf, &buflen);
/* Get and display remote ip address and request headers */
netconn_peer(conn, &naddr, &port);
debugPrint("[Request from %s]\n", ip4addr_ntoa(ip_2_ip4(&naddr)));
for (int i = 0; i < buflen; i++) debugPrint("%c", buf[i]);
if ((buflen >= 9) && (memcmp(buf, "GET /quit", 9) == 0))
{
http_server_serve_quit(conn);
netconn_close(conn);
netbuf_delete(inbuf);
XReboot();
}
/* Is this an HTTP GET command? (only check the first 5 chars, since
there are other formats for GET, and we're keeping it very simple )*/
if (buflen>=5 &&
buf[0]=='G' &&
buf[1]=='E' &&
buf[2]=='T' &&
buf[3]==' ' &&
buf[4]=='/' ) {
http_server_serve_index(conn);
}
}
/* Close the connection (server closes in HTTP) */
netconn_close(conn);
/* Delete the buffer (netconn_recv gives us ownership,
so we have to make sure to deallocate the buffer) */
netbuf_delete(inbuf);
}
/** The main function, never returns! */
static void
http_server_netconn_thread(void *arg)
{
struct netconn *conn, *newconn;
err_t err;
LWIP_UNUSED_ARG(arg);
/* Create a new TCP connection handle */
conn = netconn_new(NETCONN_TCP);
LWIP_ERROR("http_server: invalid conn", (conn != NULL), return;);
/* Bind to port 80 (HTTP) with default IP address */
netconn_bind(conn, NULL, 80);
/* Put the connection into LISTEN state */
netconn_listen(conn);
do {
err = netconn_accept(conn, &newconn);
if (err == ERR_OK) {
http_server_netconn_serve(newconn);
netconn_delete(newconn);
}
} while(err == ERR_OK);
LWIP_DEBUGF(HTTPD_DEBUG,
("http_server_netconn_thread: netconn_accept received error %d, shutting down",
err));
netconn_close(conn);
netconn_delete(conn);
}
/** Initialize the HTTP server (start its thread) */
void
http_server_netconn_init(void)
{
sys_thread_new("http_server_netconn", http_server_netconn_thread, NULL, DEFAULT_THREAD_STACKSIZE, DEFAULT_THREAD_PRIO);
}
#endif /* LWIP_NETCONN*/