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/* - mode: c; c-basic-offset: 2; indent-tabs-mode: nil; -*-
* vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
*
* Copyright (C) 2011 Stewart Smith
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <config.h>
#include <drizzled/module/module.h>
#include <drizzled/module/context.h>
#include <drizzled/plugin/plugin.h>
#include <drizzled/plugin.h>
#include <drizzled/sys_var.h>
#include <drizzled/gettext.h>
#include <drizzled/error.h>
#include <drizzled/query_id.h>
#include <drizzled/session.h>
#include <drizzled/internal/my_sys.h>
#include <drizzled/internal/m_string.h>
#include <algorithm>
#include <iostream>
#include <boost/program_options.hpp>
#include <drizzled/module/option_map.h>
#include <drizzled/constrained_value.h>
#include <evhttp.h>
#include <event.h>
#include <pthread.h>
#include <drizzled/execute.h>
#include <drizzled/sql/result_set.h>
#include <drizzled/plugin/listen.h>
#include <drizzled/plugin/client.h>
#include <drizzled/catalog/local.h>
#include <drizzled/version.h>
#include <plugin/json_server/json/json.h>
namespace po= boost::program_options;
using namespace drizzled;
using namespace std;
namespace drizzle_plugin
{
namespace json_server
{
static port_constraint port;
struct event_base *base= NULL;
struct evhttp *httpd;
static in_port_t getPort(void)
{
return port.get();
}
extern "C" void process_request(struct evhttp_request *req, void* );
extern "C" void process_root_request(struct evhttp_request *req, void* );
extern "C" void process_api01_version_req(struct evhttp_request *req, void* );
extern "C" void process_api01_sql_req(struct evhttp_request *req, void* );
extern "C" void process_request(struct evhttp_request *req, void* )
{
struct evbuffer *buf = evbuffer_new();
if (buf == NULL) return;
evbuffer_add_printf(buf, "Requested: %s\n", evhttp_request_uri(req));
evhttp_send_reply(req, HTTP_OK, "OK", buf);
}
extern "C" void process_root_request(struct evhttp_request *req, void* )
{
struct evbuffer *buf = evbuffer_new();
if (buf == NULL) return;
std::string output;
output.append("<html><head><title>JSON DATABASE interface demo</title></head>"
"<body>"
"<script lang=\"javascript\">"
"function to_table(obj) {"
" var str = '<table>';"
"for (var r=0; r< obj.length; r++) {"
" str+='<tr>';"
" for (var c=0; c < obj[r].length; c++) {"
" str+= '<td>' + obj[r][c] + '</td>';"
" }"
" str+='</tr>';"
"}"
"str+='</table>';"
"return str;"
"}"
"function run_query()\n"
"{"
"var url = document.getElementById(\"baseurl\").innerHTML;\n"
"var query= document.getElementById(\"query\").value;\n"
"var xmlHttp = new XMLHttpRequest();\n"
"xmlHttp.onreadystatechange = function () {\n"
"if (xmlHttp.readyState == 4 && xmlHttp.status == 200) {\n"
"var info = eval ( \"(\" + xmlHttp.responseText + \")\" );\n"
"document.getElementById( \"resultset\").innerHTML= to_table(info.result_set);\n"
"}\n"
"};\n"
"xmlHttp.open(\"POST\", url + \"/0.1/sql\", true);"
"xmlHttp.send(query);"
"}"
"\n\n"
"function update_version()\n"
"{drizzle_version(document.getElementById(\"baseurl\").innerHTML);}\n\n"
"function drizzle_version($url)"
"{"
"var xmlHttp = new XMLHttpRequest();\n"
"xmlHttp.onreadystatechange = function () {\n"
"if (xmlHttp.readyState == 4 && xmlHttp.status == 200) {\n"
"var info = eval ( \"(\" + xmlHttp.responseText + \")\" );\n"
"document.getElementById( \"drizzleversion\").innerHTML= info.version;\n"
"}\n"
"};\n"
"xmlHttp.open(\"GET\", $url + \"/0.1/version\", true);"
"xmlHttp.send(null);"
"}"
"</script>"
"<p>Drizzle Server at: <a id=\"baseurl\">http://localhost:8765</a></p>"
"<p>Drizzle server version: <a id=\"drizzleversion\"></a></p>"
"<p><textarea rows=\"3\" cols=\"40\" id=\"query\">"
"SELECT * from DATA_DICTIONARY.GLOBAL_STATUS;"
"</textarea>"
"<button type=\"button\" onclick=\"run_query();\">Execute Query</button>"
"<div id=\"resultset\"/>"
"<script lang=\"javascript\">update_version(); run_query();</script>"
"</body></html>");
evbuffer_add(buf, output.c_str(), output.length());
evhttp_send_reply(req, HTTP_OK, "OK", buf);
}
extern "C" void process_api01_version_req(struct evhttp_request *req, void* )
{
struct evbuffer *buf = evbuffer_new();
if (buf == NULL) return;
Json::Value root;
root["version"]= ::drizzled::version();
Json::StyledWriter writer;
std::string output= writer.write(root);
evbuffer_add(buf, output.c_str(), output.length());
evhttp_send_reply(req, HTTP_OK, "OK", buf);
}
extern "C" void process_api01_sql_req(struct evhttp_request *req, void* )
{
struct evbuffer *buf = evbuffer_new();
if (buf == NULL) return;
std::string input;
char buffer[1024];
int l=0;
do {
l= evbuffer_remove(req->input_buffer, buffer, 1024);
input.append(buffer, l);
}while(l);
drizzled::Session::shared_ptr _session= drizzled::Session::make_shared(drizzled::plugin::Listen::getNullClient(),
drizzled::catalog::local());
drizzled::identifier::user::mptr user_id= identifier::User::make_shared();
user_id->setUser("");
_session->setUser(user_id);
_session->set_db("test");
drizzled::Execute execute(*(_session.get()), true);
drizzled::sql::ResultSet result_set(1);
/* Execute wraps the SQL to run within a transaction */
execute.run(input, result_set);
drizzled::sql::Exception exception= result_set.getException();
drizzled::error_t err= exception.getErrorCode();
Json::Value root;
root["sqlstate"]= exception.getSQLState();
if ((err != drizzled::EE_OK) && (err != drizzled::ER_EMPTY_QUERY))
{
root["error_message"]= exception.getErrorMessage();
root["error_code"]= exception.getErrorCode();
}
while (result_set.next())
{
Json::Value json_row;
for (size_t x= 0; x < result_set.getMetaData().getColumnCount(); x++)
{
if (not result_set.isNull(x))
{
json_row[x]= result_set.getString(x);
}
}
root["result_set"].append(json_row);
}
root["query"]= input;
Json::StyledWriter writer;
std::string output= writer.write(root);
evbuffer_add(buf, output.c_str(), output.length());
evhttp_send_reply(req, HTTP_OK, "OK", buf);
}
extern "C" void *libevent_thread(void*);
extern "C" void *libevent_thread(void*)
{
internal::my_thread_init();
event_base_dispatch(base);
evhttp_free(httpd);
return NULL;
}
static int json_server_init(drizzled::module::Context &context)
{
context.registerVariable(new sys_var_constrained_value_readonly<in_port_t>("port", port));
base= event_init();
httpd= evhttp_new(base);
if (httpd == NULL)
return -1;
int r= evhttp_bind_socket(httpd, "0.0.0.0", getPort());
if (r != 0)
return -2;
evhttp_set_cb(httpd, "/", process_root_request, NULL);
evhttp_set_cb(httpd, "/0.1/version", process_api01_version_req, NULL);
evhttp_set_cb(httpd, "/0.1/sql", process_api01_sql_req, NULL);
evhttp_set_gencb(httpd, process_request, NULL);
pthread_t libevent_loop_thread;
pthread_create(&libevent_loop_thread, NULL, libevent_thread, NULL);
return 0;
}
static void init_options(drizzled::module::option_context &context)
{
context("port",
po::value<port_constraint>(&port)->default_value(80),
_("Port number to use for connection or 0 for default (port 80) "));
}
} /* namespace json_server */
} /* namespace drizzle_plugin */
DRIZZLE_DECLARE_PLUGIN
{
DRIZZLE_VERSION_ID,
"json-server",
"0.1",
"Stewart Smith",
"JSON HTTP interface",
PLUGIN_LICENSE_GPL,
drizzle_plugin::json_server::json_server_init, /* Plugin Init */
NULL, /* depends */
drizzle_plugin::json_server::init_options /* config options */
}
DRIZZLE_DECLARE_PLUGIN_END;
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