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#include <pch.hpp>
#include <boost/filesystem/path.hpp>
#include <boost/algorithm/string/predicate.hpp>
#include "cgiRequestContext.h"
#include "commonObjects.h"
#include "rowProcessor.h"
#include "presenter.h"
#include "safeMapFind.h"
#include "scriptStorage.h"
#include "rowSet.h"
#include "exceptions.h"
#include <factory.impl.h>
typedef std::map<std::string, std::string> VarMap;
class RoutingTable {
public:
class Route;
typedef AdHoc::Factory<RoutingTable::Route, std::shared_ptr<const ScriptNode>> RouteFactory;
void loadRoutesFromFile(const std::string & routeFile) {
routeScriptPath = routeFile;
if (routeFile.empty()) {
routes.clear();
routeScript.reset();
}
else {
setRouteScript();
}
}
void clearRoutes() {
routes.clear();
}
void onBefore()
{
if (routeScript && !routeScript->isCurrent()) {
setRouteScript();
}
}
void setRouteScript()
{
routeScript = ScriptReader::resolveScript(CommonObjects::datasourceRoot, routeScriptPath, true);
routeScript->loader.addLoadTarget(routeScript->root(), Storer::into<RouteFactory>(&routes));
routes.clear();
routeScript->load(NULL, true);
}
ScriptReaderPtr routeScript;
std::string routeScriptPath;
const std::string & present(const std::string & path, VarMap & vars) const {
for (const auto & route : routes) {
vars.clear();
if (route->matches(path, vars)) {
return route->present;
}
}
throw ScriptNotFound("routed", path);
}
class RouteElem {
public:
virtual bool matches(const std::string &, VarMap & vars) const = 0;
};
typedef std::shared_ptr<RouteElem> RouteElemPtr;
class RouteLiteral : public RouteElem {
public:
RouteLiteral(const std::string & v) : value(v) { }
bool matches(const std::string & path, VarMap &) const {
return value == path;
}
const std::string value;
};
class RouteVar : public RouteElem {
public:
RouteVar(const std::string & v) : variable(v.substr(1, v.length() - 2)) { }
bool matches(const std::string & value, VarMap & vars) const {
vars[variable] = value;
return true;
}
const std::string variable;
};
class Route : public SourceObject {
public:
Route(ScriptNodePtr s) :
SourceObject(s),
present(s->value("present", NULL).as<std::string>()),
path(s->value("path", NULL).as<std::string>())
{
boost::filesystem::path fspath = path;
boost::filesystem::path::iterator p = fspath.begin();
p++;
while(p != fspath.end() && p->string() != ".") {
switch (p->string().front()) {
case '{':
routeElems.push_back(std::make_shared<RouteVar>(p->string()));
break;
default:
routeElems.push_back(std::make_shared<RouteLiteral>(p->string()));
break;
}
p++;
}
}
bool matches(const boost::filesystem::path & path, VarMap & vars) const {
boost::filesystem::path::iterator p = path.begin();
p++;
for (RouteElems::const_iterator re = routeElems.begin(); re != routeElems.end() || p != path.end(); re++) {
if (re == routeElems.end() || p == path.end() || !(*re)->matches(p->string(), vars)) {
return false;
}
while (++p != path.end() && p->string() == ".") ;
}
return true;
}
typedef std::list<RouteElemPtr> RouteElems;
RouteElems routeElems;
const std::string present;
const std::string path;
};
typedef std::shared_ptr<Route> RoutePtr;
std::list<RoutePtr> routes;
};
NAMEDFACTORY("route", RoutingTable::Route, RoutingTable::RouteFactory);
class ProgRouter;
class ProgRouterFactory : public RouterFactory::For<ProgRouter>, public LifeCycle {
public:
void onBefore() override
{
routingTable.onBefore();
}
static RoutingTable routingTable;
INITOPTIONS;
};
RoutingTable ProgRouterFactory::routingTable;
DECLARE_OPTIONS(ProgRouterFactory, "CGI Programmable Router options")
("cgi.progRouter.routes", Options::functions(
boost::bind(&RoutingTable::loadRoutesFromFile, &routingTable, _1),
boost::bind(&RoutingTable::clearRoutes, &routingTable)),
"Script file defining web service routes")
END_OPTIONS(ProgRouterFactory);
SimpleMessageException(UriElementNotFound);
class ProgRouter : public Router {
public:
ProgRouter(const std::string & p) :
path(p) {
}
std::string route() const {
return ProgRouterFactory::routingTable.present(path, vars);
}
bool isDefault() const {
return false;
}
VariableType routeParameter(const VariableType & vp) const {
return AdHoc::safeMapLookup<UriElementNotFound>(vars, vp);
}
unsigned int parameterCount() const {
return vars.size();
}
void present(const MultiRowSetPresenter * p) const {
p->addNewArray("uriElem", true);
boost::filesystem::path y(path);
boost::filesystem::path::iterator pathPart = y.begin();
while(++pathPart != y.end()) {
p->addNamedValue("uriElem", pathPart->string());
}
p->finishArray(true);
p->addNewArray("uriParam", true);
for (const auto & v : vars) {
p->addNewRow("uriParam");
p->addNamedValue(v.first, v.second);
p->finishRow();
}
p->finishArray(true);
}
private:
const std::string path;
mutable VarMap vars;
};
NAMEDPLUGIN("progRouter", ProgRouterFactory, RouterFactory);
class Routes : public RowSet {
public:
Routes(ScriptNodePtr s) :
SourceObject(s),
RowSet(s) { }
class RouteRowState : public RowState {
public:
RouteRowState() {
columns.insert(std::make_shared<Column>(0, "present"));
columns.insert(std::make_shared<Column>(1, "path"));
fields.resize(2);
}
const Columns & getColumns() const { return columns; }
mutable Columns columns;
friend class Routes;
};
void execute(const Glib::ustring & filter, const RowProcessorCallback & rp, ExecContext *) const
{
RouteRowState rs;
for (const auto & r : ProgRouterFactory::routingTable.routes) {
if (boost::algorithm::starts_with(r->path, filter)) {
rs.fields[0] = VariableType(r->present);
rs.fields[1] = VariableType(r->path);
rp(&rs);
}
}
}
};
NAMEDFACTORY("routes", Routes, RowSetFactory);
INSTANTIATEFACTORY(RoutingTable::Route, std::shared_ptr<const ScriptNode>);
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