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// file : mod/external-handler.hxx -*- C++ -*-
// copyright : Copyright (c) 2014-2019 Code Synthesis Ltd
// license : MIT; see accompanying LICENSE file
#ifndef MOD_EXTERNAL_HANDLER_HXX
#define MOD_EXTERNAL_HANDLER_HXX
#include <libbutl/manifest-parser.mxx>
#include <libbrep/types.hxx>
#include <libbrep/utility.hxx>
#include <mod/diagnostics.hxx>
namespace brep
{
// Utility for running external handler programs.
//
namespace external_handler
{
// Run an external handler program and, if it exited normally with the
// zero exit status, return the result manifest it is expected to write to
// stdout, containing at least the HTTP status value. Otherwise, log an
// error and return nullopt. Redirect the program stderr to the web server
// error log.
//
// If the timeout (in seconds) is not zero and the handler program does
// not exit in the allotted time, then it is killed and its termination is
// treated as abnormal.
//
// Note that warnings can be logged regardless of the program success. If
// the trace argument is not NULL, then trace records are also logged.
//
struct result_manifest
{
uint16_t status;
// All values, including status but excluding format version and
// end-of-manifest.
//
vector<butl::manifest_name_value> values;
};
optional<result_manifest>
run (const path& handler,
const strings& args,
const dir_path& data_dir,
size_t timeout,
const basic_mark& error,
const basic_mark& warn,
const basic_mark* trace);
}
}
#endif // MOD_EXTERNAL_HANDLER_HXX
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