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Added some documentation

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This commit is contained in:
Mark Riddoch
2014-07-16 16:11:27 +01:00
parent 23eed37b9f
commit b335bad380
1 changed files with 126 additions and 3 deletions
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129
server/modules/routing/webserver.c
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@ -24,10 +24,16 @@
#include <monitor.h>
#include <string.h>
/**
* The instance structure for this router.
*/
typedef struct {
SERVICE *service;
} WEB_INSTANCE;
/**
* The session structure for this router.
*/
typedef struct {
SESSION *session;
} WEB_SESSION;
@ -75,9 +81,12 @@ static void send_servers(WEB_SESSION *);
static void send_monitors(WEB_SESSION *);
static void respond_error(WEB_SESSION *, int, char *);
/**
* A map of URL to function that implements the URL
*/
static struct {
char *page;
void (*fcn)(WEB_SESSION *);
char *page; /* URL */
void (*fcn)(WEB_SESSION *); /* Function to call */
} pages[] = {
{ "index.html", send_index },
{ "services.html", send_services },
@ -243,6 +252,9 @@ getCapabilities(ROUTER *inst, void *router_session)
return 0;
}
/**
* The HTML of the index page.
*/
static char *index_page =
"<HTML><HEAD>"
"<LINK REL=\"stylesheet\" type=\"text/css\" href=\"styles.css\">"
@ -254,6 +266,9 @@ static char *index_page =
"</FRAMESET>"
"</HTML>";
/**
* The HTML of the title page
*/
static char *title_page =
"<HTML><HEAD>"
"<LINK REL=\"stylesheet\" type=\"text/css\" href=\"styles.css\">"
@ -262,6 +277,9 @@ static char *title_page =
"<H1>MaxScale - Status View</H1>"
"</BODY></HTML>";
/**
* HTML of the main frames, those below the title frame
*/
static char *frame1_page =
"<HTML>"
"<FRAMESET COLS=\"20%,80%\">"
@ -270,6 +288,9 @@ static char *frame1_page =
"</FRAMESET>"
"</HTML>";
/**
* The menu page HTML
*/
static char *menu_page =
"<HTML><HEAD>"
"<LINK REL=\"stylesheet\" type=\"text/css\" href=\"styles.css\">"
@ -281,8 +302,14 @@ static char *menu_page =
"<LI><A HREF=\"sessions.html\" target=\"darea\">Sessions</A>"
"</UL></BODY></HTML>";
/**
* A blank page, contents of the display area when we first connect
*/
static char *blank_page = "<HTML><BODY>&nbsp;</BODY></HTML>";
/**
* The CSS used for every "page"
*/
static char *css =
"table, td, th { border: 1px solid blue; }\n"
"th { background-color: blue; color: white; padding: 5px }\n"
@ -297,7 +324,9 @@ static char *css =
"p { font-family: serif }\n"
"li { font-family: serif }\n";
/**
* Send the standard HTTP headers for an HTML file
*/
static void
send_html_header(DCB *dcb)
{
@ -313,12 +342,23 @@ const char *fmt = "%a, %d %b %Y %H:%M:%S GMT";
dcb_printf(dcb, "\r\n");
}
/**
* Send a static HTML page
*
* @param dcb The DCB of the connection to the browser
* @param html The HTML to send
*/
static void
send_static_html(DCB *dcb, char *html)
{
dcb_printf(dcb, html);
}
/**
* Send the index page
*
* @param session The router session
*/
static void
send_index(WEB_SESSION *session)
{
@ -329,6 +369,11 @@ DCB *dcb = session->session->client;
dcb_close(dcb);
}
/**
* Send the CSS
*
* @param session The router session
*/
static void
send_css(WEB_SESSION *session)
{
@ -339,6 +384,11 @@ DCB *dcb = session->session->client;
dcb_close(dcb);
}
/**
* Send the title page
*
* @param session The router session
*/
static void
send_title(WEB_SESSION *session)
{
@ -349,6 +399,11 @@ DCB *dcb = session->session->client;
dcb_close(dcb);
}
/**
* Send the frame1 page
*
* @param session The router session
*/
static void
send_frame1(WEB_SESSION *session)
{
@ -359,6 +414,11 @@ DCB *dcb = session->session->client;
dcb_close(dcb);
}
/**
* Send the menu page
*
* @param session The router session
*/
static void
send_menu(WEB_SESSION *session)
{
@ -369,6 +429,11 @@ DCB *dcb = session->session->client;
dcb_close(dcb);
}
/**
* Send a blank page
*
* @param session The router session
*/
static void
send_blank(WEB_SESSION *session)
{
@ -379,6 +444,13 @@ DCB *dcb = session->session->client;
dcb_close(dcb);
}
/**
* Write a table row for a service. This is called using the service
* iterator function
*
* @param service The service to display
* @param dcb The DCB to print the HTML to
*/
static void
service_row(SERVICE *service, DCB *dcb)
{
@ -387,6 +459,12 @@ service_row(SERVICE *service, DCB *dcb)
service->stats.n_current, service->stats.n_sessions);
}
/**
* Send the services page. This produces a table by means of the
* serviceIterate call.
*
* @param session The router session
*/
static void
send_services(WEB_SESSION *session)
{
@ -403,6 +481,13 @@ DCB *dcb = session->session->client;
dcb_close(dcb);
}
/**
* Write a session row for a session. this is called using the session
* iterator function
*
* @param session The session to display
* @param dcb The DCB to send the HTML to
*/
static void
session_row(SESSION *session, DCB *dcb)
{
@ -414,6 +499,13 @@ session_row(SESSION *session, DCB *dcb)
session_state(session->state));
}
/**
* Send the sessions page. The produces a table of all the current sessions
* display. It makes use of the sessionIterate call to call the function
* session_row() with each session.
*
* @param session The router session
*/
static void
send_sessions(WEB_SESSION *session)
{
@ -430,6 +522,13 @@ DCB *dcb = session->session->client;
dcb_close(dcb);
}
/**
* Display a table row for a particular server. This is called via the
* serverIterate call in send_servers.
*
* @param server The server to print
* @param dcb The DCB to send the HTML to
*/
static void
server_row(SERVER *server, DCB *dcb)
{
@ -438,6 +537,11 @@ server_row(SERVER *server, DCB *dcb)
server_status(server), server->stats.n_current);
}
/**
* Send the servers page
*
* @param session The router session
*/
static void
send_servers(WEB_SESSION *session)
{
@ -454,6 +558,12 @@ DCB *dcb = session->session->client;
dcb_close(dcb);
}
/**
* Print a table row for the monitors table
*
* @param monitor The monitor to print
* @param dcb The DCB to print to
*/
static void
monitor_row(MONITOR *monitor, DCB *dcb)
{
@ -462,6 +572,12 @@ monitor_row(MONITOR *monitor, DCB *dcb)
? "Running" : "Stopped");
}
/**
* Send the monitors page. This iterates on all the monitors and send
* the rows via the monitor_monitor.
*
* @param session The router session
*/
static void
send_monitors(WEB_SESSION *session)
{
@ -477,6 +593,13 @@ DCB *dcb = session->session->client;
dcb_close(dcb);
}
/**
* Respond with an HTTP error
*
* @param session The router session
* @param err The HTTP error code to send
* @param msg The message to print
*/
static void
respond_error(WEB_SESSION *session, int err, char *msg)
{