104 lines
3.0 KiB
C
104 lines
3.0 KiB
C
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#include "lwip/opt.h"
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#include "lwip/arch.h"
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#include "lwip/api.h"
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#include "httpserver-netconn.h"
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#if LWIP_NETCONN
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#ifndef HTTPD_DEBUG
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#define HTTPD_DEBUG LWIP_DBG_OFF
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#endif
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static const char http_html_hdr[] = "HTTP/1.1 200 OK\r\nContent-type: text/html\r\n\r\n";
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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.</body></html>";
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/** Serve one HTTP connection accepted in the http thread */
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static void
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http_server_netconn_serve(struct netconn *conn)
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{
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struct netbuf *inbuf;
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char *buf;
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u16_t buflen;
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err_t err;
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/* Read the data from the port, blocking if nothing yet there.
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We assume the request (the part we care about) is in one netbuf */
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err = netconn_recv(conn, &inbuf);
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if (err == ERR_OK) {
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netbuf_data(inbuf, (void**)&buf, &buflen);
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/* Is this an HTTP GET command? (only check the first 5 chars, since
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there are other formats for GET, and we're keeping it very simple )*/
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if (buflen>=5 &&
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buf[0]=='G' &&
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buf[1]=='E' &&
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buf[2]=='T' &&
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buf[3]==' ' &&
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buf[4]=='/' ) {
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/* Send the HTML header
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* subtract 1 from the size, since we don't send the \0 in the string
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* NETCONN_NOCOPY: our data is const static, so no need to copy it
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*/
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netconn_write(conn, http_html_hdr, sizeof(http_html_hdr)-1, NETCONN_NOCOPY);
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/* Send our HTML page */
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netconn_write(conn, http_index_html, sizeof(http_index_html)-1, NETCONN_NOCOPY);
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}
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}
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/* Close the connection (server closes in HTTP) */
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netconn_close(conn);
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/* Delete the buffer (netconn_recv gives us ownership,
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so we have to make sure to deallocate the buffer) */
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netbuf_delete(inbuf);
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}
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/** The main function, never returns! */
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static void
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http_server_netconn_thread(void *arg)
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{
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struct netconn *conn, *newconn;
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err_t err;
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LWIP_UNUSED_ARG(arg);
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/* Create a new TCP connection handle */
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/* Bind to port 80 (HTTP) with default IP address */
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#if LWIP_IPV6
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conn = netconn_new(NETCONN_TCP_IPV6);
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netconn_bind(conn, IP6_ADDR_ANY, 80);
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#else /* LWIP_IPV6 */
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conn = netconn_new(NETCONN_TCP);
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netconn_bind(conn, IP_ADDR_ANY, 80);
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#endif /* LWIP_IPV6 */
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LWIP_ERROR("http_server: invalid conn", (conn != NULL), return;);
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/* Put the connection into LISTEN state */
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netconn_listen(conn);
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do {
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err = netconn_accept(conn, &newconn);
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if (err == ERR_OK) {
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http_server_netconn_serve(newconn);
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netconn_delete(newconn);
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}
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} while(err == ERR_OK);
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LWIP_DEBUGF(HTTPD_DEBUG,
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("http_server_netconn_thread: netconn_accept received error %d, shutting down",
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err));
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netconn_close(conn);
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netconn_delete(conn);
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}
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/** Initialize the HTTP server (start its thread) */
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void
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http_server_netconn_init(void)
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{
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sys_thread_new("http_server_netconn", http_server_netconn_thread, NULL, DEFAULT_THREAD_STACKSIZE, DEFAULT_THREAD_PRIO);
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}
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#endif /* LWIP_NETCONN*/
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