source: azure_iot_hub_f767zi/trunk/asp_baseplatform/lwip/contrib-2.1.0/apps/httpserver/httpserver-netconn.c@ 457

Last change on this file since 457 was 457, checked in by coas-nagasima, 4 years ago

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1
2#include "lwip/opt.h"
3#include "lwip/arch.h"
4#include "lwip/api.h"
5
6#include "httpserver-netconn.h"
7
8#if LWIP_NETCONN
9
10#ifndef HTTPD_DEBUG
11#define HTTPD_DEBUG LWIP_DBG_OFF
12#endif
13
14static const char http_html_hdr[] = "HTTP/1.1 200 OK\r\nContent-type: text/html\r\n\r\n";
15static 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>";
16
17/** Serve one HTTP connection accepted in the http thread */
18static void
19http_server_netconn_serve(struct netconn *conn)
20{
21 struct netbuf *inbuf;
22 char *buf;
23 u16_t buflen;
24 err_t err;
25
26 /* Read the data from the port, blocking if nothing yet there.
27 We assume the request (the part we care about) is in one netbuf */
28 err = netconn_recv(conn, &inbuf);
29
30 if (err == ERR_OK) {
31 netbuf_data(inbuf, (void**)&buf, &buflen);
32
33 /* Is this an HTTP GET command? (only check the first 5 chars, since
34 there are other formats for GET, and we're keeping it very simple )*/
35 if (buflen>=5 &&
36 buf[0]=='G' &&
37 buf[1]=='E' &&
38 buf[2]=='T' &&
39 buf[3]==' ' &&
40 buf[4]=='/' ) {
41
42 /* Send the HTML header
43 * subtract 1 from the size, since we dont send the \0 in the string
44 * NETCONN_NOCOPY: our data is const static, so no need to copy it
45 */
46 netconn_write(conn, http_html_hdr, sizeof(http_html_hdr)-1, NETCONN_NOCOPY);
47
48 /* Send our HTML page */
49 netconn_write(conn, http_index_html, sizeof(http_index_html)-1, NETCONN_NOCOPY);
50 }
51 }
52 /* Close the connection (server closes in HTTP) */
53 netconn_close(conn);
54
55 /* Delete the buffer (netconn_recv gives us ownership,
56 so we have to make sure to deallocate the buffer) */
57 netbuf_delete(inbuf);
58}
59
60/** The main function, never returns! */
61static void
62http_server_netconn_thread(void *arg)
63{
64 struct netconn *conn, *newconn;
65 err_t err;
66 LWIP_UNUSED_ARG(arg);
67
68 /* Create a new TCP connection handle */
69 /* Bind to port 80 (HTTP) with default IP address */
70#if LWIP_IPV6
71 conn = netconn_new(NETCONN_TCP_IPV6);
72 netconn_bind(conn, IP6_ADDR_ANY, 80);
73#else /* LWIP_IPV6 */
74 conn = netconn_new(NETCONN_TCP);
75 netconn_bind(conn, IP_ADDR_ANY, 80);
76#endif /* LWIP_IPV6 */
77 LWIP_ERROR("http_server: invalid conn", (conn != NULL), return;);
78
79 /* Put the connection into LISTEN state */
80 netconn_listen(conn);
81
82 do {
83 err = netconn_accept(conn, &newconn);
84 if (err == ERR_OK) {
85 http_server_netconn_serve(newconn);
86 netconn_delete(newconn);
87 }
88 } while(err == ERR_OK);
89 LWIP_DEBUGF(HTTPD_DEBUG,
90 ("http_server_netconn_thread: netconn_accept received error %d, shutting down",
91 err));
92 netconn_close(conn);
93 netconn_delete(conn);
94}
95
96/** Initialize the HTTP server (start its thread) */
97void
98http_server_netconn_init(void)
99{
100 sys_thread_new("http_server_netconn", http_server_netconn_thread, NULL, DEFAULT_THREAD_STACKSIZE, DEFAULT_THREAD_PRIO);
101}
102
103#endif /* LWIP_NETCONN*/
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