nghttp2/src/shrpx_mruby_module_response.cc

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/*
* nghttp2 - HTTP/2 C Library
*
* Copyright (c) 2015 Tatsuhiro Tsujikawa
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#include "shrpx_mruby_module_response.h"
#include <mruby/variable.h>
#include <mruby/string.h>
#include <mruby/hash.h>
#include <mruby/array.h>
#include "shrpx_downstream.h"
#include "shrpx_upstream.h"
#include "shrpx_client_handler.h"
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#include "shrpx_mruby.h"
#include "shrpx_mruby_module.h"
#include "util.h"
#include "http2.h"
namespace shrpx {
namespace mruby {
namespace {
mrb_value response_init(mrb_state *mrb, mrb_value self) { return self; }
} // namespace
namespace {
mrb_value response_get_http_version_major(mrb_state *mrb, mrb_value self) {
auto data = static_cast<MRubyAssocData *>(mrb->ud);
auto downstream = data->downstream;
return mrb_fixnum_value(downstream->get_response_major());
}
} // namespace
namespace {
mrb_value response_get_http_version_minor(mrb_state *mrb, mrb_value self) {
auto data = static_cast<MRubyAssocData *>(mrb->ud);
auto downstream = data->downstream;
return mrb_fixnum_value(downstream->get_response_minor());
}
} // namespace
namespace {
mrb_value response_get_status(mrb_state *mrb, mrb_value self) {
auto data = static_cast<MRubyAssocData *>(mrb->ud);
auto downstream = data->downstream;
return mrb_fixnum_value(downstream->get_response_http_status());
}
} // namespace
namespace {
mrb_value response_set_status(mrb_state *mrb, mrb_value self) {
auto data = static_cast<MRubyAssocData *>(mrb->ud);
auto downstream = data->downstream;
mrb_int status;
mrb_get_args(mrb, "i", &status);
// We don't support 1xx status code for mruby scripting yet.
if (status < 200 || status > 999) {
mrb_raise(mrb, E_RUNTIME_ERROR,
"invalid status; it should be [200, 999], inclusive");
}
downstream->set_response_http_status(status);
return self;
}
} // namespace
namespace {
mrb_value response_get_headers(mrb_state *mrb, mrb_value self) {
auto data = static_cast<MRubyAssocData *>(mrb->ud);
auto downstream = data->downstream;
return create_headers_hash(mrb, downstream->get_response_headers());
}
} // namespace
namespace {
mrb_value response_mod_header(mrb_state *mrb, mrb_value self, bool repl) {
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auto data = static_cast<MRubyAssocData *>(mrb->ud);
auto downstream = data->downstream;
mrb_value key, values;
mrb_get_args(mrb, "oo", &key, &values);
if (RSTRING_LEN(key) == 0) {
mrb_raise(mrb, E_RUNTIME_ERROR, "empty key is not allowed");
}
key = mrb_funcall(mrb, key, "downcase", 0);
if (repl) {
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size_t p = 0;
auto &headers = downstream->get_response_headers();
for (size_t i = 0; i < headers.size(); ++i) {
auto &hd = headers[i];
if (util::streq(std::begin(hd.name), hd.name.size(), RSTRING_PTR(key),
RSTRING_LEN(key))) {
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continue;
}
if (i != p) {
headers[p++] = std::move(hd);
}
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}
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headers.resize(p);
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}
if (mrb_obj_is_instance_of(mrb, values, mrb->array_class)) {
auto n = mrb_ary_len(mrb, values);
for (int i = 0; i < n; ++i) {
auto value = mrb_ary_entry(values, i);
downstream->add_response_header(
std::string(RSTRING_PTR(key), RSTRING_LEN(key)),
std::string(RSTRING_PTR(value), RSTRING_LEN(value)));
}
} else if (!mrb_nil_p(values)) {
downstream->add_response_header(
std::string(RSTRING_PTR(key), RSTRING_LEN(key)),
std::string(RSTRING_PTR(values), RSTRING_LEN(values)));
}
data->response_headers_dirty = true;
return mrb_nil_value();
}
} // namespace
namespace {
mrb_value response_set_header(mrb_state *mrb, mrb_value self) {
return response_mod_header(mrb, self, true);
}
} // namespace
namespace {
mrb_value response_add_header(mrb_state *mrb, mrb_value self) {
return response_mod_header(mrb, self, false);
}
} // namespace
namespace {
mrb_value response_clear_headers(mrb_state *mrb, mrb_value self) {
auto data = static_cast<MRubyAssocData *>(mrb->ud);
auto downstream = data->downstream;
downstream->clear_response_headers();
return mrb_nil_value();
}
} // namespace
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namespace {
mrb_value response_return(mrb_state *mrb, mrb_value self) {
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auto data = static_cast<MRubyAssocData *>(mrb->ud);
auto downstream = data->downstream;
int rv;
if (downstream->get_response_state() == Downstream::MSG_COMPLETE) {
mrb_raise(mrb, E_RUNTIME_ERROR, "response has already been committed");
}
const char *val;
mrb_int vallen;
mrb_get_args(mrb, "|s", &val, &vallen);
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const uint8_t *body = nullptr;
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size_t bodylen = 0;
if (downstream->get_response_http_status() == 0) {
downstream->set_response_http_status(200);
}
if (data->response_headers_dirty) {
downstream->index_response_headers();
data->response_headers_dirty = false;
}
if (downstream->expect_response_body() && vallen > 0) {
body = reinterpret_cast<const uint8_t *>(val);
bodylen = vallen;
}
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auto cl = downstream->get_response_header(http2::HD_CONTENT_LENGTH);
if (cl) {
cl->value = util::utos(bodylen);
} else {
downstream->add_response_header("content-length", util::utos(bodylen),
http2::HD_CONTENT_LENGTH);
}
downstream->set_response_content_length(bodylen);
auto upstream = downstream->get_upstream();
rv = upstream->send_reply(downstream, body, bodylen);
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if (rv != 0) {
mrb_raise(mrb, E_RUNTIME_ERROR, "could not send response");
}
auto handler = upstream->get_client_handler();
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handler->signal_write();
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return self;
}
} // namespace
void init_response_class(mrb_state *mrb, RClass *module) {
auto response_class =
mrb_define_class_under(mrb, module, "Response", mrb->object_class);
mrb_define_method(mrb, response_class, "initialize", response_init,
MRB_ARGS_NONE());
mrb_define_method(mrb, response_class, "http_version_major",
response_get_http_version_major, MRB_ARGS_NONE());
mrb_define_method(mrb, response_class, "http_version_minor",
response_get_http_version_minor, MRB_ARGS_NONE());
mrb_define_method(mrb, response_class, "status", response_get_status,
MRB_ARGS_NONE());
mrb_define_method(mrb, response_class, "status=", response_set_status,
MRB_ARGS_REQ(1));
mrb_define_method(mrb, response_class, "headers", response_get_headers,
MRB_ARGS_NONE());
mrb_define_method(mrb, response_class, "add_header", response_add_header,
MRB_ARGS_REQ(2));
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mrb_define_method(mrb, response_class, "set_header", response_set_header,
MRB_ARGS_REQ(2));
mrb_define_method(mrb, response_class, "clear_headers",
response_clear_headers, MRB_ARGS_NONE());
mrb_define_method(mrb, response_class, "return", response_return,
MRB_ARGS_OPT(1));
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}
} // namespace mruby
} // namespace shrpx