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pandemonium_engine/scene/main/http_request.cpp

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/*************************************************************************/
/* http_request.cpp */
/*************************************************************************/
/* This file is part of: */
/* PANDEMONIUM ENGINE */
/* https://github.com/Relintai/pandemonium_engine */
/*************************************************************************/
/* Copyright (c) 2022-present Péter Magyar. */
/* Copyright (c) 2014-2022 Godot Engine contributors (cf. AUTHORS.md). */
/* Copyright (c) 2007-2022 Juan Linietsky, Ariel Manzur. */
/* */
/* 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 "http_request.h"
#include "core/os/file_access.h"
#include "core/os/thread.h"
#include "scene/main/timer.h"
void HTTPRequest::_redirect_request(const String &p_new_url) {
}
Error HTTPRequest::_request() {
return client->connect_to_host(url, port, use_ssl, validate_ssl);
}
Error HTTPRequest::_parse_url(const String &p_url) {
use_ssl = false;
request_string = "";
port = 80;
request_sent = false;
got_response = false;
body_len = -1;
body.resize(0);
downloaded.set(0);
redirections = 0;
String scheme;
Error err = p_url.parse_url(scheme, url, port, request_string);
ERR_FAIL_COND_V_MSG(err != OK, err, "Error parsing URL: " + p_url + ".");
if (scheme == "https://") {
use_ssl = true;
} else if (scheme != "http://") {
ERR_FAIL_V_MSG(ERR_INVALID_PARAMETER, "Invalid URL scheme: " + scheme + ".");
}
if (port == 0) {
port = use_ssl ? 443 : 80;
}
if (request_string.empty()) {
request_string = "/";
}
return OK;
}
Error HTTPRequest::request(const String &p_url, const Vector<String> &p_custom_headers, bool p_ssl_validate_domain, HTTPClient::Method p_method, const String &p_request_data) {
// Copy the string into a raw buffer
PoolVector<uint8_t> raw_data;
CharString charstr = p_request_data.utf8();
size_t len = charstr.length();
raw_data.resize(len);
memcpy(raw_data.write().ptr(), charstr.ptr(), len);
return request_raw(p_url, p_custom_headers, p_ssl_validate_domain, p_method, raw_data);
}
Error HTTPRequest::request_raw(const String &p_url, const Vector<String> &p_custom_headers, bool p_ssl_validate_domain, HTTPClient::Method p_method, const PoolVector<uint8_t> &p_request_data_raw) {
ERR_FAIL_COND_V(!is_inside_tree(), ERR_UNCONFIGURED);
ERR_FAIL_COND_V_MSG(requesting, ERR_BUSY, "HTTPRequest is processing a request. Wait for completion or cancel it before attempting a new one.");
if (timeout > 0.0) {
timer->stop();
timer->start(timeout);
}
method = p_method;
Error err = _parse_url(p_url);
if (err) {
return err;
}
validate_ssl = p_ssl_validate_domain;
headers = p_custom_headers;
request_data = p_request_data_raw;
requesting = true;
if (use_threads.is_set()) {
thread_done.clear();
thread_request_quit.clear();
client->set_blocking_mode(true);
thread.start(_thread_func, this);
} else {
client->set_blocking_mode(false);
err = _request();
if (err != OK) {
call_deferred("_request_done", RESULT_CANT_CONNECT, 0, PoolStringArray(), PoolByteArray());
return ERR_CANT_CONNECT;
}
set_process_internal(true);
}
return OK;
}
void HTTPRequest::_thread_func(void *p_userdata) {
HTTPRequest *hr = (HTTPRequest *)p_userdata;
Error err = hr->_request();
if (err != OK) {
hr->call_deferred("_request_done", RESULT_CANT_CONNECT, 0, PoolStringArray(), PoolByteArray());
} else {
while (!hr->thread_request_quit.is_set()) {
bool exit = hr->_update_connection();
if (exit) {
break;
}
OS::get_singleton()->delay_usec(1);
}
}
hr->thread_done.set();
}
void HTTPRequest::cancel_request() {
timer->stop();
if (!requesting) {
return;
}
if (!use_threads.is_set()) {
set_process_internal(false);
} else {
thread_request_quit.set();
thread.wait_to_finish();
}
if (file) {
memdelete(file);
file = nullptr;
}
client->close();
body.resize(0);
got_response = false;
response_code = -1;
request_sent = false;
requesting = false;
}
bool HTTPRequest::_handle_response(bool *ret_value) {
if (!client->has_response()) {
call_deferred("_request_done", RESULT_NO_RESPONSE, 0, PoolStringArray(), PoolByteArray());
*ret_value = true;
return true;
}
got_response = true;
response_code = client->get_response_code();
List<String> rheaders;
client->get_response_headers(&rheaders);
response_headers.resize(0);
downloaded.set(0);
for (List<String>::Element *E = rheaders.front(); E; E = E->next()) {
response_headers.push_back(E->get());
}
if (response_code == 301 || response_code == 302) {
// Handle redirect
if (max_redirects >= 0 && redirections >= max_redirects) {
call_deferred("_request_done", RESULT_REDIRECT_LIMIT_REACHED, response_code, response_headers, PoolByteArray());
*ret_value = true;
return true;
}
String new_request;
for (List<String>::Element *E = rheaders.front(); E; E = E->next()) {
if (E->get().findn("Location: ") != -1) {
new_request = E->get().substr(9, E->get().length()).strip_edges();
}
}
if (new_request != "") {
// Process redirect
client->close();
int new_redirs = redirections + 1; // Because _request() will clear it
Error err;
if (new_request.begins_with("http")) {
// New url, request all again
_parse_url(new_request);
} else {
request_string = new_request;
}
err = _request();
if (err == OK) {
request_sent = false;
got_response = false;
body_len = -1;
body.resize(0);
downloaded.set(0);
redirections = new_redirs;
*ret_value = false;
return true;
}
}
}
return false;
}
bool HTTPRequest::_update_connection() {
switch (client->get_status()) {
case HTTPClient::STATUS_DISCONNECTED: {
call_deferred("_request_done", RESULT_CANT_CONNECT, 0, PoolStringArray(), PoolByteArray());
return true; // End it, since it's doing something
} break;
case HTTPClient::STATUS_RESOLVING: {
client->poll();
// Must wait
return false;
} break;
case HTTPClient::STATUS_CANT_RESOLVE: {
call_deferred("_request_done", RESULT_CANT_RESOLVE, 0, PoolStringArray(), PoolByteArray());
return true;
} break;
case HTTPClient::STATUS_CONNECTING: {
client->poll();
// Must wait
return false;
} break; // Connecting to IP
case HTTPClient::STATUS_CANT_CONNECT: {
call_deferred("_request_done", RESULT_CANT_CONNECT, 0, PoolStringArray(), PoolByteArray());
return true;
} break;
case HTTPClient::STATUS_CONNECTED: {
if (request_sent) {
if (!got_response) {
// No body
bool ret_value;
if (_handle_response(&ret_value)) {
return ret_value;
}
call_deferred("_request_done", RESULT_SUCCESS, response_code, response_headers, PoolByteArray());
return true;
}
if (body_len < 0) {
// Chunked transfer is done
call_deferred("_request_done", RESULT_SUCCESS, response_code, response_headers, body);
return true;
}
call_deferred("_request_done", RESULT_CHUNKED_BODY_SIZE_MISMATCH, response_code, response_headers, PoolByteArray());
return true;
// Request might have been done
} else {
// Did not request yet, do request
Error err = client->request_raw(method, request_string, headers, request_data);
if (err != OK) {
call_deferred("_request_done", RESULT_CONNECTION_ERROR, 0, PoolStringArray(), PoolByteArray());
return true;
}
request_sent = true;
return false;
}
} break; // Connected: break requests only accepted here
case HTTPClient::STATUS_REQUESTING: {
// Must wait, still requesting
client->poll();
return false;
} break; // Request in progress
case HTTPClient::STATUS_BODY: {
if (!got_response) {
bool ret_value;
if (_handle_response(&ret_value)) {
return ret_value;
}
if (!client->is_response_chunked() && client->get_response_body_length() == 0) {
call_deferred("_request_done", RESULT_SUCCESS, response_code, response_headers, PoolByteArray());
return true;
}
// No body len (-1) if chunked or no content-length header was provided.
// Change your webserver configuration if you want body len.
body_len = client->get_response_body_length();
if (body_size_limit >= 0 && body_len > body_size_limit) {
call_deferred("_request_done", RESULT_BODY_SIZE_LIMIT_EXCEEDED, response_code, response_headers, PoolByteArray());
return true;
}
if (download_to_file != String()) {
file = FileAccess::open(download_to_file, FileAccess::WRITE);
if (!file) {
call_deferred("_request_done", RESULT_DOWNLOAD_FILE_CANT_OPEN, response_code, response_headers, PoolByteArray());
return true;
}
}
}
client->poll();
if (client->get_status() != HTTPClient::STATUS_BODY) {
return false;
}
PoolByteArray chunk = client->read_response_body_chunk();
if (chunk.size()) {
downloaded.add(chunk.size());
if (file) {
PoolByteArray::Read r = chunk.read();
file->store_buffer(r.ptr(), chunk.size());
if (file->get_error() != OK) {
call_deferred("_request_done", RESULT_DOWNLOAD_FILE_WRITE_ERROR, response_code, response_headers, PoolByteArray());
return true;
}
} else {
body.append_array(chunk);
}
}
if (body_size_limit >= 0 && downloaded.get() > body_size_limit) {
call_deferred("_request_done", RESULT_BODY_SIZE_LIMIT_EXCEEDED, response_code, response_headers, PoolByteArray());
return true;
}
if (body_len >= 0) {
if (downloaded.get() == body_len) {
call_deferred("_request_done", RESULT_SUCCESS, response_code, response_headers, body);
return true;
}
} else if (client->get_status() == HTTPClient::STATUS_DISCONNECTED) {
// We read till EOF, with no errors. Request is done.
call_deferred("_request_done", RESULT_SUCCESS, response_code, response_headers, body);
return true;
}
return false;
} break; // Request resulted in body: break which must be read
case HTTPClient::STATUS_CONNECTION_ERROR: {
call_deferred("_request_done", RESULT_CONNECTION_ERROR, 0, PoolStringArray(), PoolByteArray());
return true;
} break;
case HTTPClient::STATUS_SSL_HANDSHAKE_ERROR: {
call_deferred("_request_done", RESULT_SSL_HANDSHAKE_ERROR, 0, PoolStringArray(), PoolByteArray());
return true;
} break;
}
ERR_FAIL_V(false);
}
void HTTPRequest::_request_done(int p_status, int p_code, const PoolStringArray &p_headers, const PoolByteArray &p_data) {
cancel_request();
emit_signal("request_completed", p_status, p_code, p_headers, p_data);
}
void HTTPRequest::_notification(int p_what) {
if (p_what == NOTIFICATION_INTERNAL_PROCESS) {
if (use_threads.is_set()) {
return;
}
bool done = _update_connection();
if (done) {
set_process_internal(false);
// cancel_request(); called from _request done now
}
}
if (p_what == NOTIFICATION_EXIT_TREE) {
if (requesting) {
cancel_request();
}
}
}
void HTTPRequest::set_use_threads(bool p_use) {
ERR_FAIL_COND(get_http_client_status() != HTTPClient::STATUS_DISCONNECTED);
use_threads.set_to(p_use);
}
bool HTTPRequest::is_using_threads() const {
return use_threads.is_set();
}
void HTTPRequest::set_body_size_limit(int p_bytes) {
ERR_FAIL_COND(get_http_client_status() != HTTPClient::STATUS_DISCONNECTED);
body_size_limit = p_bytes;
}
int HTTPRequest::get_body_size_limit() const {
return body_size_limit;
}
void HTTPRequest::set_download_file(const String &p_file) {
ERR_FAIL_COND(get_http_client_status() != HTTPClient::STATUS_DISCONNECTED);
download_to_file = p_file;
}
String HTTPRequest::get_download_file() const {
return download_to_file;
}
void HTTPRequest::set_download_chunk_size(int p_chunk_size) {
ERR_FAIL_COND(get_http_client_status() != HTTPClient::STATUS_DISCONNECTED);
client->set_read_chunk_size(p_chunk_size);
}
int HTTPRequest::get_download_chunk_size() const {
return client->get_read_chunk_size();
}
HTTPClient::Status HTTPRequest::get_http_client_status() const {
return client->get_status();
}
void HTTPRequest::set_max_redirects(int p_max) {
max_redirects = p_max;
}
int HTTPRequest::get_max_redirects() const {
return max_redirects;
}
int HTTPRequest::get_downloaded_bytes() const {
return downloaded.get();
}
int HTTPRequest::get_body_size() const {
return body_len;
}
void HTTPRequest::set_http_proxy(const String &p_host, int p_port) {
client->set_http_proxy(p_host, p_port);
}
void HTTPRequest::set_https_proxy(const String &p_host, int p_port) {
client->set_https_proxy(p_host, p_port);
}
void HTTPRequest::set_timeout(double p_timeout) {
if (Math::is_zero_approx(p_timeout)) {
timeout = 0.0;
} else {
ERR_FAIL_COND(p_timeout < 0.0);
timeout = p_timeout;
}
}
double HTTPRequest::get_timeout() {
return timeout;
}
void HTTPRequest::_timeout() {
cancel_request();
call_deferred("_request_done", RESULT_TIMEOUT, 0, PoolStringArray(), PoolByteArray());
}
void HTTPRequest::_bind_methods() {
ClassDB::bind_method(D_METHOD("request_raw", "url", "custom_headers", "ssl_validate_domain", "method", "request_data_raw"), &HTTPRequest::request_raw, DEFVAL(PoolStringArray()), DEFVAL(true), DEFVAL(HTTPClient::METHOD_GET), DEFVAL(PoolVector<uint8_t>()));
ClassDB::bind_method(D_METHOD("request", "url", "custom_headers", "ssl_validate_domain", "method", "request_data"), &HTTPRequest::request, DEFVAL(PoolStringArray()), DEFVAL(true), DEFVAL(HTTPClient::METHOD_GET), DEFVAL(String()));
ClassDB::bind_method(D_METHOD("cancel_request"), &HTTPRequest::cancel_request);
ClassDB::bind_method(D_METHOD("get_http_client_status"), &HTTPRequest::get_http_client_status);
ClassDB::bind_method(D_METHOD("set_use_threads", "enable"), &HTTPRequest::set_use_threads);
ClassDB::bind_method(D_METHOD("is_using_threads"), &HTTPRequest::is_using_threads);
ClassDB::bind_method(D_METHOD("set_body_size_limit", "bytes"), &HTTPRequest::set_body_size_limit);
ClassDB::bind_method(D_METHOD("get_body_size_limit"), &HTTPRequest::get_body_size_limit);
ClassDB::bind_method(D_METHOD("set_max_redirects", "amount"), &HTTPRequest::set_max_redirects);
ClassDB::bind_method(D_METHOD("get_max_redirects"), &HTTPRequest::get_max_redirects);
ClassDB::bind_method(D_METHOD("set_download_file", "path"), &HTTPRequest::set_download_file);
ClassDB::bind_method(D_METHOD("get_download_file"), &HTTPRequest::get_download_file);
ClassDB::bind_method(D_METHOD("get_downloaded_bytes"), &HTTPRequest::get_downloaded_bytes);
ClassDB::bind_method(D_METHOD("get_body_size"), &HTTPRequest::get_body_size);
ClassDB::bind_method(D_METHOD("_redirect_request"), &HTTPRequest::_redirect_request);
ClassDB::bind_method(D_METHOD("_request_done"), &HTTPRequest::_request_done);
ClassDB::bind_method(D_METHOD("set_timeout", "timeout"), &HTTPRequest::set_timeout);
ClassDB::bind_method(D_METHOD("get_timeout"), &HTTPRequest::get_timeout);
ClassDB::bind_method(D_METHOD("set_download_chunk_size", "chunk_size"), &HTTPRequest::set_download_chunk_size);
ClassDB::bind_method(D_METHOD("get_download_chunk_size"), &HTTPRequest::get_download_chunk_size);
ClassDB::bind_method(D_METHOD("set_http_proxy", "host", "port"), &HTTPRequest::set_http_proxy);
ClassDB::bind_method(D_METHOD("set_https_proxy", "host", "port"), &HTTPRequest::set_https_proxy);
ClassDB::bind_method(D_METHOD("_timeout"), &HTTPRequest::_timeout);
ADD_PROPERTY(PropertyInfo(Variant::STRING, "download_file", PROPERTY_HINT_FILE), "set_download_file", "get_download_file");
ADD_PROPERTY(PropertyInfo(Variant::INT, "download_chunk_size", PROPERTY_HINT_RANGE, "256,16777216"), "set_download_chunk_size", "get_download_chunk_size");
ADD_PROPERTY(PropertyInfo(Variant::BOOL, "use_threads"), "set_use_threads", "is_using_threads");
ADD_PROPERTY(PropertyInfo(Variant::INT, "body_size_limit", PROPERTY_HINT_RANGE, "-1,2000000000"), "set_body_size_limit", "get_body_size_limit");
ADD_PROPERTY(PropertyInfo(Variant::INT, "max_redirects", PROPERTY_HINT_RANGE, "-1,64"), "set_max_redirects", "get_max_redirects");
ADD_PROPERTY(PropertyInfo(Variant::REAL, "timeout", PROPERTY_HINT_RANGE, "0,3600,0.1,or_greater"), "set_timeout", "get_timeout");
ADD_SIGNAL(MethodInfo("request_completed", PropertyInfo(Variant::INT, "result"), PropertyInfo(Variant::INT, "response_code"), PropertyInfo(Variant::POOL_STRING_ARRAY, "headers"), PropertyInfo(Variant::POOL_BYTE_ARRAY, "body")));
BIND_ENUM_CONSTANT(RESULT_SUCCESS);
//BIND_ENUM_CONSTANT( RESULT_NO_BODY );
BIND_ENUM_CONSTANT(RESULT_CHUNKED_BODY_SIZE_MISMATCH);
BIND_ENUM_CONSTANT(RESULT_CANT_CONNECT);
BIND_ENUM_CONSTANT(RESULT_CANT_RESOLVE);
BIND_ENUM_CONSTANT(RESULT_CONNECTION_ERROR);
BIND_ENUM_CONSTANT(RESULT_SSL_HANDSHAKE_ERROR);
BIND_ENUM_CONSTANT(RESULT_NO_RESPONSE);
BIND_ENUM_CONSTANT(RESULT_BODY_SIZE_LIMIT_EXCEEDED);
BIND_ENUM_CONSTANT(RESULT_REQUEST_FAILED);
BIND_ENUM_CONSTANT(RESULT_DOWNLOAD_FILE_CANT_OPEN);
BIND_ENUM_CONSTANT(RESULT_DOWNLOAD_FILE_WRITE_ERROR);
BIND_ENUM_CONSTANT(RESULT_REDIRECT_LIMIT_REACHED);
BIND_ENUM_CONSTANT(RESULT_TIMEOUT);
}
HTTPRequest::HTTPRequest() {
port = 80;
redirections = 0;
max_redirects = 8;
body_len = -1;
got_response = false;
validate_ssl = false;
use_ssl = false;
response_code = 0;
request_sent = false;
requesting = false;
client.instance();
body_size_limit = -1;
file = nullptr;
timer = memnew(Timer);
timer->set_one_shot(true);
timer->connect("timeout", this, "_timeout");
add_child(timer);
timeout = 0.0;
}
HTTPRequest::~HTTPRequest() {
if (file) {
memdelete(file);
}
}
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