httpd.c File Reference

Httpd server.

Copyright (c) 2013-2018 Microchip Technology Inc. and its subsidiaries.

#include <string.h>
#include "lwip/opt.h"
#include "lwip/tcpip.h"
#include "fs.h"
#include "httpd.h"
#include "cgi.h"

Macros
#define	HTTP_DEFAULT_PAGE   "index.html"

Functions
const char *	get_ext (const char *name)
	Get filename extension type. More...
static void	http_decodeUrl (const char *raw_buf, size_t raw_len, char *decodec_buf, size_t len)
	Decode URL. More...
static void	http_getPageName (const char *recv_buf, size_t recv_len, char *page_name, size_t len)
	Get requested page name. More...
int	http_getValue (char *tolenized_buf, size_t tolenized_buf_len, const char *key, char *value, size_t len)
	Get key value from tokenized buffer. More...
static char	http_hexToAscii (char first, char second)
	ASCII to HEX converter. More...
void	http_request (void *pvParameters)
	Core HTTP server function processing the request. More...
static int	http_searchContentType (const char *name)
	Match content type based on filename extension. More...
void	http_sendInternalErr (struct netconn *client, int content_type)
	Send HTTP internal server error code. More...
void	http_sendOk (struct netconn *client, int content_type)
	Send the HTTP header with the appropriated content type. More...
int	http_tokenizeGetRequest (char *raw_buf, size_t raw_len)
	Tokenize a buffer. More...

Variables
struct {
const char *   content
const char *   key
}	http_content_type []
static const char	http_html_hdr_200 [] = "HTTP/1.0 200 OK\r\n"
static const char	http_html_hdr_404 [] = "HTTP/1.0 404 Not Found\r\n"
static const char	http_html_hdr_500 [] = "HTTP/1.0 500 Internal Server Error\r\n"
const char	http_server_error []
BoardStatus	status

#define HTTP_DEFAULT_PAGE   "index.html"

Referenced by http_request().

const char* get_ext

(

const char *

name

)

Get filename extension type.

Parameters

name	String containing a filename.

Returns

Extension type on success, NULL otherwise.

References NULL.

Referenced by cgi_search(), and http_searchContentType().

static void http_decodeUrl ( const char *  raw_buf, size_t  raw_len, char *  decodec_buf, size_t  len  )

static

Decode URL.

Parameters

raw_buf	Input buffer.
raw_len	Input buffer length.
decodec_buf	Output decoded buffer.
len	Output buffer length.

References http_hexToAscii().

Referenced by http_getValue().

static void http_getPageName ( const char *  recv_buf, size_t  recv_len, char *  page_name, size_t  len  )

static

Get requested page name.

Parameters

recv_buf	Receive buffer.
recv_len	Receive buffer length.
page_name	Output buffer to store requestd page name.
len	Output buffer length.

Referenced by http_request().

int http_getValue	(	char *	tolenized_buf,
		size_t	tolenized_buf_len,
		const char *	key,
		char *	value,
		size_t	len
	)

Get key value from tokenized buffer.

References http_decodeUrl().

static char http_hexToAscii ( char  first, char  second  )

static

ASCII to HEX converter.

Parameters

first	First digit.
second	Second digit.

Returns

String result.

Referenced by http_decodeUrl().

void http_request

(

void *

pvParameters

)

Core HTTP server function processing the request.

Parameters

pvParameters

Netconn socket to use.

References cgi_search(), cgi_table, fs_file::data, ERR_OK, fs_open(), HTTP_CONTENT_HTML, HTTP_DEFAULT_PAGE, http_getPageName(), http_html_hdr_404, http_searchContentType(), http_sendInternalErr(), http_sendOk(), http_server_error, fs_file::len, netbuf_data(), netbuf_delete(), netconn_close(), NETCONN_COPY, netconn_delete(), netconn_recv(), netconn_write, NULL, and vTaskDelete().

Referenced by http_task().

static int http_searchContentType ( const char *  name )

static

Match content type based on filename extension.

Parameters

name	String containing a filename.

Returns

Content type index on success, 0 otherwise.

References get_ext(), HTTP_CONTENT_CNT, HTTP_CONTENT_JPEG, http_content_type, and key.

Referenced by http_request().

void http_sendInternalErr	(	struct netconn *	client,
		int	content_type
	)

Send HTTP internal server error code.

References content, http_content_type, http_html_hdr_500, NETCONN_COPY, and netconn_write.

Referenced by http_request().

void http_sendOk	(	struct netconn *	client,
		int	content_type
	)

Send the HTTP header with the appropriated content type.

Parameters

client	Socket to send data to.
content_type	Index in the http_content_type table.

References content, http_content_type, http_html_hdr_200, NETCONN_COPY, and netconn_write.

Referenced by cgi_chipInfo(), cgi_status(), and http_request().

int http_tokenizeGetRequest	(	char *	raw_buf,
		size_t	raw_len
	)

Tokenize a buffer.

Parameters

raw_buf	Buffer to parse.
raw_len	Buffer length.

Returns

The number of found tokens.

const char* content

Referenced by http_sendInternalErr(), and http_sendOk().

struct { ... } http_content_type[]

Initial value:

= {
    {"", "Content-type: application/json\r\n\r\n"},
    {"html", "Content-type: text/html\r\n\r\n"},
    {"css", "Content-type: text/css\r\n\r\n"},
    {"js", "Content-type: text/javascript\r\n\r\n"},
    {"png", "Content-type: image/png\r\n\r\n"},
    {"jpg", "Content-type: image/jpeg\r\n\r\n"},
    {"gif", "Content-type: image/gif\r\n\r\n"},
    {"txt", "Content-type: text/plain\r\n\r\n"},
}

Referenced by http_searchContentType(), http_sendInternalErr(), and http_sendOk().

const char http_html_hdr_200[] = "HTTP/1.0 200 OK\r\n"

static

Referenced by http_sendOk().

const char http_html_hdr_404[] = "HTTP/1.0 404 Not Found\r\n"

static

Referenced by http_request().

const char http_html_hdr_500[] = "HTTP/1.0 500 Internal Server Error\r\n"

static

Referenced by http_sendInternalErr().

const char http_server_error[]

Initial value:

= " \
<!DOCTYPE html PUBLIC \"-//IETF//DTD HTML 2.0//EN\"> \
<html><head><meta http-equiv=\"Content-Type\" content=\"text/html; charset=ISO-8859-1\"> \
<title>500 Internal Server error</title></head><body><h1>500 Internal Server error</h1> \
<p>The internal server error was occur while processing the requested page.</p> \
</body></html>"

Referenced by http_request().

const char* key

Referenced by http_searchContentType().

BoardStatus status

Referenced by cgi_status(), pio_handler_process(), and smc_ecc_get_status().