utility.c File Reference

Webserver utility functions. More...

#include "compile_time.h"
#include "src/webserver/utility.h"
#include "src/lib/cache/cache_disk_images.h"
#include "src/lib/config/config_def.h"
#include "src/lib/filehandler.h"
#include "src/lib/log.h"
#include "src/lib/sds/sds_extras.h"
#include "src/lib/sds/sds_file.h"
#include "src/lib/sds/sds_url.h"
#include "src/webserver/response.h"

Include dependency graph for utility.c:

Functions
bool	webserver_enforce_acl (struct mg_connection *nc, sds acl)
bool	webserver_enforce_conn_limit (struct mg_connection *nc, int connection_count)
struct mg_connection *	get_nc_by_id (struct mg_mgr *mgr, unsigned long id)
struct t_list *	webserver_parse_arguments (struct mg_http_message *hm)
sds	print_ip (sds s, struct mg_addr *addr)
sds	get_uri_param (struct mg_str *query, const char *name)
bool	get_partition_from_uri (struct mg_connection *nc, struct mg_http_message *hm, struct t_frontend_nc_data *frontend_nc_data)
bool	check_imagescache (struct mg_connection *nc, struct mg_http_message *hm, struct t_mg_user_data *mg_user_data, const char *type, sds uri_decoded, int offset)
sds	webserver_find_image_file (sds basefilename)
bool	find_image_in_folder (sds *coverfile, sds music_directory, sds path, sds *names, int names_len)
void	webserver_handle_connection_close (struct mg_connection *nc)

Variables
static const char *	image_file_extensions []

Detailed Description

Webserver utility functions.

Function Documentation

check_imagescache()

bool check_imagescache	(	struct mg_connection *	nc,
		struct mg_http_message *	hm,
		struct t_mg_user_data *	mg_user_data,
		const char *	type,
		sds	uri_decoded,
		int	offset )

Checks the covercache and serves the image

Parameters

nc	mongoose connection
hm	http message
mg_user_data	pointer to mongoose configuration
type	cache type: cover or thumbs
uri_decoded	image uri
offset	embedded image offset

Returns

true if an image is served, false if no image was found in cache

find_image_in_folder()

bool find_image_in_folder	(	sds *	coverfile,
		sds	music_directory,
		sds	path,
		sds *	names,
		int	names_len )

Finds an image in a specific subdir in dir

Parameters

coverfile	pointer to already allocated sds string to append the found image path
music_directory	parent directory
path	subdirectory
names	sds array of names
names_len	length of sds array

Returns

true on success, else false

get_nc_by_id()

struct mg_connection * get_nc_by_id	(	struct mg_mgr *	mgr,
		unsigned long	id )

Returns the mongoose connection by id

Parameters

mgr	mongoose mgr
id	connection id

Returns

struct mg_connection* or NULL if not found

get_partition_from_uri()

bool get_partition_from_uri	(	struct mg_connection *	nc,
		struct mg_http_message *	hm,
		struct t_frontend_nc_data *	frontend_nc_data )

Sets the partition from uri and handles errors

Parameters

nc	mongoose connection
hm	http message
frontend_nc_data	frontend nc data

Returns

true on success, else false

get_uri_param()

sds get_uri_param	(	struct mg_str *	query,
		const char *	name )

Gets and decodes an url parameter. The key will not be url decoded before matching.

Parameters

query	query string to parse
name	name to get, you must append "=" to the name

Returns

url decoded value or NULL on error

print_ip()

sds print_ip	(	sds	s,
		struct mg_addr *	addr )

Prints the ip address from a mg_addr struct

Parameters

s	already allocated sds string to append the ip
addr	pointer to struct mg_addr

Returns

sds pointer to s

webserver_enforce_acl()

bool webserver_enforce_acl	(	struct mg_connection *	nc,
		sds	acl )

Public functions Matches the acl against the client ip and sends an error response / drains the connection if acl is not matched

Parameters

nc	mongoose connection
acl	acl string to check

Returns

true if acl matches, else false

webserver_enforce_conn_limit()

bool webserver_enforce_conn_limit	(	struct mg_connection *	nc,
		int	connection_count )

Enforces the connection limit

Parameters

nc	mongoose connection
connection_count	connection count

Returns

true if connection count is not exceeded, else false

webserver_find_image_file()

sds webserver_find_image_file

(

sds

basefilename

)

Finds the first image with basefilename by trying out extensions

Parameters

basefilename

basefilename to append extensions

Returns

pointer to extended basefilename on success, else empty

webserver_handle_connection_close()

void webserver_handle_connection_close

(

struct mg_connection *

nc

)

Drains the connection if connection is set to close

Parameters

nc	mongoose connection

webserver_parse_arguments()

struct t_list * webserver_parse_arguments

(

struct mg_http_message *

hm

)

Extract arguments from query parameters

Parameters

hm	Http message

Returns

Parsed arguments as t_list struct.

Variable Documentation

image_file_extensions

const char* image_file_extensions[]

static

Initial value:

= {
    "webp", "jpg", "jpeg", "png", "svg", "avif", "jxl",
    "WEBP", "JPG", "JPEG", "PNG", "SVG", "AVIF", "JXL",
    NULL}

Image file extensions to detect