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/* Copyright (c) 2019 Dovecot authors, see the included COPYING file */
#include "stats-common.h"
#include "str.h"
#include "array.h"
#include "strescape.h"
#include "connection.h"
#include "ostream.h"
#include "master-service.h"
#include "http-server.h"
#include "http-url.h"
#include "stats-metrics.h"
#include "stats-service.h"
#include "client-http.h"
struct stats_http_client;
struct stats_http_client {
struct http_server_connection *http_conn;
};
struct stats_http_resource {
pool_t pool;
const char *title;
struct http_server_resource *resource;
stats_http_resource_callback_t *callback;
void *context;
};
static struct http_server *stats_http_server;
static ARRAY(struct stats_http_resource *) stats_http_resources;
/*
* Request
*/
static void
stats_http_server_handle_request(void *context ATTR_UNUSED,
struct http_server_request *http_sreq)
{
http_server_request_fail(http_sreq, 404, "Path Not Found");
}
/*
* Connection
*/
static void
stats_http_server_connection_destroy(void *context, const char *reason);
static const struct http_server_callbacks stats_http_callbacks = {
.connection_destroy = stats_http_server_connection_destroy,
.handle_request = stats_http_server_handle_request
};
void client_http_create(struct master_service_connection *conn)
{
struct stats_http_client *client;
client = i_new(struct stats_http_client, 1);
client->http_conn = http_server_connection_create(
stats_http_server, conn->fd, conn->fd, conn->ssl,
&stats_http_callbacks, client);
}
static void stats_http_client_destroy(struct stats_http_client *client)
{
i_free(client);
master_service_client_connection_destroyed(master_service);
}
static void
stats_http_server_connection_destroy(void *context,
const char *reason ATTR_UNUSED)
{
struct stats_http_client *client = context;
if (client->http_conn == NULL) {
/* Already destroying client directly */
return;
}
/* HTTP connection is destroyed already now */
client->http_conn = NULL;
/* Destroy the connection itself */
stats_http_client_destroy(client);
}
/*
* Resources
*/
/* Registry */
static void
stats_http_resource_callback(struct stats_http_resource *res,
struct http_server_request *req,
const char *sub_path)
{
res->callback(res->context, req, sub_path);
}
#undef stats_http_resource_add
void stats_http_resource_add(const char *path, const char *title,
stats_http_resource_callback_t *callback,
void *context)
{
struct stats_http_resource *res;
pool_t pool;
pool = pool_alloconly_create("stats http resource", 2048);
res = p_new(pool, struct stats_http_resource, 1);
res->pool = pool;
res->title = p_strdup(pool, title);
res->callback = callback;
res->context = context;
res->resource = http_server_resource_create(
stats_http_server, pool, stats_http_resource_callback, res);
http_server_resource_add_location(res->resource, path);
pool_unref(&pool);
array_append(&stats_http_resources, &res, 1);
}
/* Root */
static void
stats_http_resource_root_make_response(struct http_server_response *resp,
const struct http_request *hreq)
{
struct stats_http_resource *res;
struct http_url url;
string_t *msg;
http_url_init_authority_from(&url, hreq->target.url);
msg = t_str_new(1024);
str_append(msg, "<!DOCTYPE html>\n");
str_append(msg, "<html lang=\"en\">\n");
str_append(msg, "\n");
str_append(msg, "<head>\n");
str_append(msg, "<meta charset=\"utf-8\">\n");
str_append(msg, "<title>Dovecot Stats</title>\n");
str_append(msg, "</head>\n");
str_append(msg, "\n");
str_append(msg, "<body>\n");
str_append(msg, "<h1>Dovecot Stats:</h1>\n");
str_append(msg, "<p><ul>\n");
array_foreach_elem(&stats_http_resources, res) {
if (res->title == NULL)
continue;
/* List the resource at its primary location. */
url.path = http_server_resource_get_path(res->resource);
str_append(msg, "<li><a href=\"");
str_append(msg, http_url_create(&url));
str_append(msg, "\">");
str_append(msg, res->title);
str_append(msg, "</a></li>\n");
}
str_append(msg, "</ul></p>\n");
str_append(msg, "</body>\n");
str_append(msg, "\n");
str_append(msg, "</html>\n");
http_server_response_set_payload_data(
resp, str_data(msg), str_len(msg));
}
static void
stats_http_resource_root_request(void *context ATTR_UNUSED,
struct http_server_request *req,
const char *sub_path)
{
const struct http_request *hreq = http_server_request_get(req);
struct http_server_response *resp;
if (strcmp(hreq->method, "OPTIONS") == 0) {
resp = http_server_response_create(req, 200, "OK");
http_server_response_add_header(resp, "Allow", "GET");
http_server_response_submit(resp);
return;
}
if (strcmp(hreq->method, "GET") != 0) {
http_server_request_fail_bad_method(req, "GET");
return;
}
if (*sub_path != '\0') {
http_server_request_fail(req, 404, "Not Found");
return;
}
resp = http_server_response_create(req, 200, "OK");
http_server_response_add_header(resp, "Content-Type",
"text/html; charset=utf-8");
stats_http_resource_root_make_response(resp, hreq);
http_server_response_submit(resp);
}
/*
* Server
*/
void client_http_init(const struct stats_settings *set)
{
struct http_server_settings http_set = {
.rawlog_dir = set->stats_http_rawlog_dir,
};
i_array_init(&stats_http_resources, 8);
stats_http_server = http_server_init(&http_set);
stats_http_resource_add("/", NULL,
stats_http_resource_root_request, NULL);
}
void client_http_deinit(void)
{
http_server_deinit(&stats_http_server);
array_free(&stats_http_resources);
}
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