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 "shrpx_log.h"
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#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;
const auto &resp = downstream->response();
return mrb_fixnum_value(resp.http_major);
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}
} // 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;
const auto &resp = downstream->response();
return mrb_fixnum_value(resp.http_minor);
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}
} // namespace
namespace {
mrb_value response_get_status(mrb_state *mrb, mrb_value self) {
auto data = static_cast<MRubyAssocData *>(mrb->ud);
auto downstream = data->downstream;
const auto &resp = downstream->response();
return mrb_fixnum_value(resp.http_status);
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}
} // namespace
namespace {
mrb_value response_set_status(mrb_state *mrb, mrb_value self) {
auto data = static_cast<MRubyAssocData *>(mrb->ud);
auto downstream = data->downstream;
auto &resp = downstream->response();
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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");
}
resp.http_status = status;
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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;
const auto &resp = downstream->response();
return create_headers_hash(mrb, resp.fs.headers());
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}
} // 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;
auto &resp = downstream->response();
auto &balloc = downstream->get_block_allocator();
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mrb_value key, values;
mrb_get_args(mrb, "So", &key, &values);
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if (RSTRING_LEN(key) == 0) {
mrb_raise(mrb, E_RUNTIME_ERROR, "empty key is not allowed");
}
auto ai = mrb_gc_arena_save(mrb);
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key = mrb_funcall(mrb, key, "downcase", 0);
auto keyref =
make_string_ref(balloc, StringRef{RSTRING_PTR(key),
static_cast<size_t>(RSTRING_LEN(key))});
mrb_gc_arena_restore(mrb, ai);
auto token = http2::lookup_token(keyref.byte(), keyref.size());
if (repl) {
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size_t p = 0;
auto &headers = resp.fs.headers();
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for (size_t i = 0; i < headers.size(); ++i) {
auto &kv = headers[i];
if (kv.name == keyref) {
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continue;
}
if (i != p) {
headers[p++] = std::move(kv);
}
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}
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headers.resize(p);
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}
if (mrb_array_p(values)) {
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auto n = mrb_ary_len(mrb, values);
for (int i = 0; i < n; ++i) {
auto value = mrb_ary_ref(mrb, values, i);
if (!mrb_string_p(value)) {
mrb_raise(mrb, E_RUNTIME_ERROR, "value must be string");
}
resp.fs.add_header_token(
keyref,
make_string_ref(balloc,
StringRef{RSTRING_PTR(value),
static_cast<size_t>(RSTRING_LEN(value))}),
false, token);
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}
} else if (mrb_string_p(values)) {
resp.fs.add_header_token(
keyref,
make_string_ref(balloc,
StringRef{RSTRING_PTR(values),
static_cast<size_t>(RSTRING_LEN(values))}),
false, token);
} else {
mrb_raise(mrb, E_RUNTIME_ERROR, "value must be string");
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}
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;
auto &resp = downstream->response();
resp.fs.clear_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;
auto &req = downstream->request();
auto &resp = downstream->response();
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int rv;
auto &balloc = downstream->get_block_allocator();
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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 (resp.http_status == 0) {
resp.http_status = 200;
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}
if (downstream->expect_response_body() && vallen > 0) {
body = reinterpret_cast<const uint8_t *>(val);
bodylen = vallen;
}
auto cl = resp.fs.header(http2::HD_CONTENT_LENGTH);
if (resp.http_status == 204 ||
(resp.http_status == 200 && req.method == HTTP_CONNECT)) {
if (cl) {
// Delete content-length here
http2::erase_header(cl);
}
resp.fs.content_length = -1;
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} else {
auto content_length = util::make_string_ref_uint(balloc, vallen);
if (cl) {
cl->value = content_length;
} else {
resp.fs.add_header_token(StringRef::from_lit("content-length"),
content_length, false, http2::HD_CONTENT_LENGTH);
}
resp.fs.content_length = vallen;
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}
auto date = resp.fs.header(http2::HD_DATE);
if (!date) {
auto lgconf = log_config();
lgconf->update_tstamp(std::chrono::system_clock::now());
resp.fs.add_header_token(StringRef::from_lit("date"),
make_string_ref(balloc, lgconf->tstamp->time_http),
false, http2::HD_DATE);
}
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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
namespace {
mrb_value response_send_info(mrb_state *mrb, mrb_value self) {
auto data = static_cast<MRubyAssocData *>(mrb->ud);
auto downstream = data->downstream;
auto &resp = downstream->response();
int rv;
if (downstream->get_response_state() == Downstream::MSG_COMPLETE) {
mrb_raise(mrb, E_RUNTIME_ERROR, "response has already been committed");
}
mrb_int http_status;
mrb_value hash;
mrb_get_args(mrb, "iH", &http_status, &hash);
if (http_status / 100 != 1) {
mrb_raise(mrb, E_RUNTIME_ERROR,
"status_code must be in range [100, 199], inclusive");
}
auto &balloc = downstream->get_block_allocator();
auto keys = mrb_hash_keys(mrb, hash);
auto keyslen = mrb_ary_len(mrb, keys);
for (int i = 0; i < keyslen; ++i) {
auto key = mrb_ary_ref(mrb, keys, i);
if (!mrb_string_p(key)) {
mrb_raise(mrb, E_RUNTIME_ERROR, "key must be string");
}
auto values = mrb_hash_get(mrb, hash, key);
auto ai = mrb_gc_arena_save(mrb);
key = mrb_funcall(mrb, key, "downcase", 0);
auto keyref = make_string_ref(
balloc,
StringRef{RSTRING_PTR(key), static_cast<size_t>(RSTRING_LEN(key))});
mrb_gc_arena_restore(mrb, ai);
auto token = http2::lookup_token(keyref.byte(), keyref.size());
if (mrb_array_p(values)) {
auto n = mrb_ary_len(mrb, values);
for (int i = 0; i < n; ++i) {
auto value = mrb_ary_ref(mrb, values, i);
if (!mrb_string_p(value)) {
mrb_raise(mrb, E_RUNTIME_ERROR, "value must be string");
}
resp.fs.add_header_token(
keyref,
make_string_ref(balloc,
StringRef{RSTRING_PTR(value),
static_cast<size_t>(RSTRING_LEN(value))}),
false, token);
}
} else if (mrb_string_p(values)) {
resp.fs.add_header_token(
keyref,
make_string_ref(balloc,
StringRef{RSTRING_PTR(values),
static_cast<size_t>(RSTRING_LEN(values))}),
false, token);
} else {
mrb_raise(mrb, E_RUNTIME_ERROR, "value must be string");
}
}
resp.http_status = http_status;
auto upstream = downstream->get_upstream();
rv = upstream->on_downstream_header_complete(downstream);
if (rv != 0) {
mrb_raise(mrb, E_RUNTIME_ERROR, "could not send non-final response");
}
return self;
}
} // namespace
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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));
mrb_define_method(mrb, response_class, "send_info", response_send_info,
MRB_ARGS_REQ(2));
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}
} // namespace mruby
} // namespace shrpx