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// file : libbutl/curl.cxx -*- C++ -*-
// copyright : Copyright (c) 2014-2019 Code Synthesis Ltd
// license : MIT; see accompanying LICENSE file
#ifndef __cpp_modules_ts
#include <libbutl/curl.mxx>
#endif
// C includes.
#include <cassert>
#ifndef __cpp_lib_modules_ts
#include <string>
#include <utility> // move()
#include <exception> // invalid_argument
#endif
// Other includes.
#ifdef __cpp_modules_ts
module butl.curl;
// Only imports additional to interface.
#ifdef __clang__
#ifdef __cpp_lib_modules_ts
import std.core;
#endif
import butl.path;
import butl.process;
import butl.fdstream;
import butl.small_vector;
#endif
import butl.utility; // casecmp()
#else
#include <libbutl/utility.mxx>
#endif
using namespace std;
namespace butl
{
process::pipe curl::
map_in (nullfd_t, method_proto mp, io_data& d)
{
switch (mp)
{
case ftp_put:
throw invalid_argument ("no input specified for PUT method");
case http_post:
throw invalid_argument ("no input specified for POST method");
case ftp_get:
case http_get:
{
d.pipe.in = fdnull (); // /dev/null
return pipe (d.pipe);
}
}
assert (false); // Can't be here.
return pipe ();
}
process::pipe curl::
map_in (const path& f, method_proto mp, io_data& d)
{
pipe r;
switch (mp)
{
case ftp_put:
case http_post:
{
if (mp == ftp_put)
{
d.options.push_back ("--upload-file");
d.options.push_back (f.string ().c_str ());
}
else
{
d.storage = '@' + f.string ();
d.options.push_back ("--data-binary");
d.options.push_back (d.storage.c_str ());
}
if (f.string () == "-")
{
d.pipe = fdopen_pipe (fdopen_mode::binary);
r = pipe (d.pipe);
out.open (move (d.pipe.out));
}
else
{
d.pipe.in = fdnull (); // /dev/null
r = pipe (d.pipe);
}
return r;
}
case ftp_get:
case http_get:
{
throw invalid_argument ("file input specified for GET method");
}
}
assert (false); // Can't be here.
return r;
}
process::pipe curl::
map_out (nullfd_t, method_proto mp, io_data& d)
{
switch (mp)
{
case ftp_get:
case http_get:
throw invalid_argument ("no output specified for GET method");
case ftp_put:
case http_post: // May or may not produce output.
{
d.pipe.out = fdnull ();
return pipe (d.pipe); // /dev/null
}
}
assert (false); // Can't be here.
return pipe ();
}
process::pipe curl::
map_out (const path& f, method_proto mp, io_data& d)
{
pipe r;
switch (mp)
{
case ftp_get:
case http_get:
case http_post:
{
if (f.string () == "-")
{
// Note: no need for any options, curl writes to stdout by default.
//
d.pipe = fdopen_pipe (fdopen_mode::binary);
r = pipe (d.pipe);
in.open (move (d.pipe.in));
}
else
{
d.options.push_back ("-o");
d.options.push_back (f.string ().c_str ());
d.pipe.out = fdnull (); // /dev/null
r = pipe (d.pipe);
}
return r;
}
case ftp_put:
{
throw invalid_argument ("file output specified for PUT method");
}
}
assert (false); // Can't be here.
return r;
}
curl::method_proto curl::
translate (method_type m, const string& u, method_proto_options& o)
{
size_t n (u.find ("://"));
if (n == string::npos)
throw invalid_argument ("no protocol in URL");
if (casecmp (u, "ftp", n) == 0 ||
casecmp (u, "tftp", n) == 0)
{
switch (m)
{
case method_type::get: return method_proto::ftp_get;
case method_type::put: return method_proto::ftp_put;
case method_type::post:
throw invalid_argument ("POST method with FTP protocol");
}
}
else if (casecmp (u, "http", n) == 0 ||
casecmp (u, "https", n) == 0)
{
o.push_back ("--fail"); // Fail on HTTP errors (e.g., 404).
o.push_back ("--location"); // Follow redirects.
switch (m)
{
case method_type::get: return method_proto::http_get;
case method_type::post: return method_proto::http_post;
case method_type::put:
throw invalid_argument ("PUT method with HTTP protocol");
}
}
throw invalid_argument ("unsupported protocol");
}
}
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