pandemonium_engine/modules/http_server_simple/http_parser.cpp

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/*************************************************************************/
/* http_parser.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. */
/*************************************************************************/
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#include "http_parser.h"
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#include "./http_parser/http_parser.h"
#include "./multipart_parser_c/multipart_parser.h"
#include "core/log/logger.h"
#include "core/os/dir_access.h"
#include "core/os/os.h"
#include "modules/web/http/web_server_request.h"
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#include "simple_web_server_request.h"
#define PROTOCOL_ERROR_LOGGING_ENABLED 0
Ref<SimpleWebServerRequest> HTTPParser::get_next_request() {
ERR_FAIL_COND_V(_requests.size() == 0, Ref<SimpleWebServerRequest>());
Ref<SimpleWebServerRequest> rn = _requests[0];
_requests.remove(0);
return rn;
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}
int HTTPParser::get_request_count() const {
return _requests.size();
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}
bool HTTPParser::is_ready() const {
return _is_ready;
}
bool HTTPParser::is_finished() const {
return !_request.is_valid();
}
bool HTTPParser::has_error() const {
return _error;
}
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void HTTPParser::reset() {
_partial_data = "";
_is_ready = false;
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_content_type = REQUEST_CONTENT_URLENCODED;
_error = false;
_current_upload_files_size = 0;
_current_request_size = 0;
_request.unref();
_requests.clear();
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}
//returns the index where processing was ended -> start of the next query if != data_length
int HTTPParser::read_from_buffer(const char *p_buffer, const int p_data_length) {
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int parsed_bytes = 0;
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parsed_bytes = static_cast<int>(http_parser_execute(parser, settings, p_buffer, p_data_length));
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if (!_upload_file_access) {
_current_request_size += parsed_bytes;
if (_current_request_size >= max_request_size) {
_error = true;
#if PROTOCOL_ERROR_LOGGING_ENABLED
PLOG_ERR("_current_request_size >= max_request_size");
#endif
}
}
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return parsed_bytes;
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}
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HTTPParser::HTTPParser() {
// Should always get set from the outside, if it remains 0 it's a bug.
max_request_size = 0;
request_max_file_upload_size = 0;
upload_file_store_type = WebServerSimple::FILE_UPLOAD_STORE_TYPE_MEMORY;
_upload_file_access = NULL;
_current_request_size = 0;
_current_upload_files_size = 0;
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_is_ready = false;
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_content_type = REQUEST_CONTENT_URLENCODED;
_multipart_form_is_file = false;
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settings = memnew(http_parser_settings);
settings->on_message_begin = _on_message_begin_cb;
settings->on_url = _on_url_cb;
settings->on_status = _on_status_cb;
settings->on_header_field = _on_header_field_cb;
settings->on_header_value = _on_header_value_cb;
settings->on_headers_complete = _on_headers_complete_cb;
settings->on_body = _on_body_cb;
settings->on_message_complete = _on_message_complete_cb;
settings->on_chunk_header = _on_chunk_header_cb;
settings->on_chunk_complete = _on_chunk_complete_cb;
//parser = malloc(sizeof(http_parser));
parser = memnew(http_parser);
http_parser_init(parser, HTTP_REQUEST);
parser->data = this;
_multipart_parser_settings = memnew(multipart_parser_settings);
_multipart_parser_settings->on_header_field = _on_multipart_header_field_cb;
_multipart_parser_settings->on_header_value = _on_multipart_header_value_cb;
_multipart_parser_settings->on_part_data = _on_multipart_part_data_cb;
_multipart_parser_settings->on_part_data_begin = _on_multipart_part_data_begin_cb;
_multipart_parser_settings->on_headers_complete = _on_multipart_headers_complete_cb;
_multipart_parser_settings->on_part_data_end = _on_multipart_part_data_end_cb;
_multipart_parser_settings->on_body_end = _on_multipart_body_end_cb;
_multipart_parser = NULL;
_error = false;
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}
HTTPParser::~HTTPParser() {
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memdelete(parser);
memdelete(settings);
parser = nullptr;
if (_upload_file_access) {
_upload_file_access->close();
memdelete(_upload_file_access);
_upload_file_access = NULL;
DirAccess *d = DirAccess::create_for_path(_upload_file_full_path.get_base_dir());
if (d) {
d->remove(_upload_file_full_path);
memdelete(d);
}
}
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}
void HTTPParser::_bind_methods() {
}
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int HTTPParser::HTTPParser::process_multipart_data(const char *at, size_t p_length) {
ERR_FAIL_COND_V(!_multipart_parser, p_length);
return multipart_parser_execute(_multipart_parser, at, p_length);
}
void HTTPParser::_process_multipart_header_value(const String &val) {
if (_queued_multipart_header_field == "content-disposition") {
int c = val.get_slice_count(";");
for (int j = 0; j < c; ++j) {
String vs = val.get_slicec(';', j).strip_edges();
if (vs.get_slice_count("=") != 2) {
continue;
}
String kk = vs.get_slicec('=', 0);
if (kk == "name") {
_multipart_form_name = vs.get_slicec('=', 1);
if (_multipart_form_name.length() >= 2 && _multipart_form_name.begins_with("\"") && _multipart_form_name.ends_with("\"")) {
_multipart_form_name.remove(0);
//TODO check if this should be _multipart_form_name.remove(_multipart_form_name.length() - 1);
_multipart_form_name.remove(_multipart_form_name.size() - 1);
}
} else if (kk == "filename") {
_multipart_form_filename = vs.get_slicec('=', 1);
_multipart_form_filename = _multipart_form_filename.replace("\"", "");
_multipart_form_is_file = true;
if (_multipart_form_name.length() >= 2 && _multipart_form_name.begins_with("\"") && _multipart_form_name.ends_with("\"")) {
_multipart_form_name.remove(0);
//TODO check if this should be _multipart_form_name.remove(_multipart_form_name.length() - 1);
_multipart_form_name.remove(_multipart_form_name.size() - 1);
}
if (upload_file_store_type == WebServerSimple::FILE_UPLOAD_STORE_TYPE_TEMP_FILES) {
if (_upload_file_access) {
ERR_PRINT("BUG! if (_upload_file_access) is true!");
_upload_file_access->close();
memdelete(_upload_file_access);
_upload_file_access = NULL;
}
DirAccess *da = DirAccess::create_for_path(upload_temp_file_store_path);
if (!da) {
// NO fallback!
ERR_PRINT("upload_file_store_type == FILE_UPLOAD_STORE_TYPE_TEMP_FILES, but temp file path cannot be opened! Sending Error!");
_error = true;
return;
}
// Just use OS::Time for now. These names are internal, and if the file is not copied out it will get deleted automatically.
// If filename exists just add values
String fbase_name = upload_temp_file_store_path + itos(OS::get_singleton()->get_unix_time()) + "_" + itos(OS::get_singleton()->get_ticks_usec());
String fname = fbase_name;
int fcounter = 0;
while (da->file_exists(fname) && fcounter < 100) {
fname = fbase_name + "_" + itos(fcounter);
++fcounter;
}
memdelete(da);
Error err;
_upload_file_access = FileAccess::open(fname, FileAccess::WRITE, &err);
if (err != OK) {
ERR_PRINT(vformat("upload_file_store_type == FILE_UPLOAD_STORE_TYPE_TEMP_FILES, but temp file cannot be opened! Sending Error! Error: %d, FileName: %s", itos(err), fname));
_error = true;
if (_upload_file_access) {
memdelete(_upload_file_access);
_upload_file_access = NULL;
}
}
_upload_file_full_path = fname;
}
}
}
} else if (_queued_multipart_header_field == "content-type") {
_multipart_form_content_type = val;
} else {
//Shouldn't happen, should probably close connection
}
_queued_multipart_header_field = "";
}
void HTTPParser::process_urlenc_data() {
if (_partial_data == "") {
return;
}
Vector<String> params = _partial_data.split("&", false);
for (int i = 0; i < params.size(); ++i) {
String p = params[i];
//Ignore if it has no, or more than one =
const CharType *c = p.ptr();
int eqc = 0;
for (int j = 0; j < p.length(); ++j) {
if (c[j] == '=') {
++eqc;
if (eqc > 1) {
break;
}
}
}
if (eqc > 1 || eqc == 0) {
continue;
}
String key = p.get_slicec('=', 0).replace("+", " ").percent_decode();
String value = p.get_slicec('=', 1).replace("+", " ").percent_decode();
_request->add_post_parameter(key, value);
}
}
bool HTTPParser::is_boundary_at(const char *at, size_t length) {
return false;
}
#define MESSAGE_DEBUG 0
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int HTTPParser::on_message_begin() {
if (_request.is_valid()) {
ERR_PRINT("Request was valid!");
}
_current_request_size = 0;
_current_upload_files_size = 0;
_in_header = true;
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_content_type = REQUEST_CONTENT_URLENCODED;
_multipart_form_is_file = false;
_request.instance();
switch (parser->method) {
case http_method::HTTP_DELETE:
_request->set_method(HTTPServerEnums::HTTP_METHOD_DELETE);
break;
case http_method::HTTP_GET:
_request->set_method(HTTPServerEnums::HTTP_METHOD_GET);
break;
case http_method::HTTP_HEAD:
_request->set_method(HTTPServerEnums::HTTP_METHOD_HEAD);
break;
case http_method::HTTP_POST:
_request->set_method(HTTPServerEnums::HTTP_METHOD_POST);
break;
case http_method::HTTP_PUT:
_request->set_method(HTTPServerEnums::HTTP_METHOD_PUT);
break;
case http_method::HTTP_OPTIONS:
_request->set_method(HTTPServerEnums::HTTP_METHOD_OPTIONS);
break;
case http_method::HTTP_PATCH:
_request->set_method(HTTPServerEnums::HTTP_METHOD_PATCH);
break;
default:
_request->set_method(HTTPServerEnums::HTTP_METHOD_INVALID);
_error = true;
#if PROTOCOL_ERROR_LOGGING_ENABLED
PLOG_ERR("Unimplemented / invalid method!");
#endif
break;
}
#if MESSAGE_DEBUG
ERR_PRINT("begin");
#endif
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return 0;
}
int HTTPParser::on_url(const char *at, size_t length) {
ERR_FAIL_COND_V(!_request.is_valid(), 0);
String s = String::utf8(at, length).uri_decode().strip_edges();
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#if MESSAGE_DEBUG
ERR_PRINT("url " + s);
#endif
_request->set_parser_path(s);
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return 0;
}
int HTTPParser::on_status(const char *at, size_t length) {
ERR_FAIL_COND_V(!_request.is_valid(), 0);
String s = String::utf8(at, length);
#if MESSAGE_DEBUG
ERR_PRINT("status " + s);
#endif
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return 0;
}
int HTTPParser::on_header_field(const char *at, size_t length) {
ERR_FAIL_COND_V(!_request.is_valid(), 0);
String s = String::utf8(at, length);
#if MESSAGE_DEBUG
ERR_PRINT("header_field " + s);
#endif
_queued_header_field = s.to_lower();
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return 0;
}
int HTTPParser::on_header_value(const char *at, size_t length) {
ERR_FAIL_COND_V(!_request.is_valid(), 0);
String s = String::utf8(at, length);
#if MESSAGE_DEBUG
ERR_PRINT("header_val " + s);
#endif
_request->add_header_parameter(_queued_header_field, s);
if (_queued_header_field == "host") {
_request->set_host(s);
} else if (_queued_header_field == "content-type") {
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// It can be:
// application/x-www-form-urlencoded (default) -> ignore, as its the default
// text/plain -> useful only for debugging "They are not reliably interpretable by computer"
// multipart/form-data
if (s.begins_with("multipart/form-data")) {
_content_type = REQUEST_CONTENT_MULTIPART_FORM_DATA;
int bs = s.find("boundary=");
if (bs == -1) {
//Error! boundary must exist
_error = true;
#if PROTOCOL_ERROR_LOGGING_ENABLED
PLOG_ERR("Boundary must exist!");
#endif
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return 0;
}
bs += 9; //skip ahead to the end of "boundary="
_multipart_boundary = "--" + s.substr(bs).strip_edges();
//_multipart_boundary = _multipart_boundary.strip_edges();
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//TODO can be inside quoted
//Append -- if it doesn't have it already
//It shouldn't be longer that 70 chars
//The CRLF preceeding could also be appended for simpler logic
if (_multipart_boundary.empty()) {
#if PROTOCOL_ERROR_LOGGING_ENABLED
PLOG_ERR("Empty boundary!");
#endif
_error = true;
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}
} else if (s.begins_with("text/plain")) {
_content_type = REQUEST_CONTENT_TEXT_PLAIN;
//maybe just close the connection?
}
} else if (_queued_header_field == "cookie") {
Vector<String> cookies = s.split(";");
for (int i = 0; i < cookies.size(); ++i) {
String c = cookies[i].strip_edges();
if (c.get_slice_count("=") != 2) {
continue;
}
String key = c.get_slice("=", 0);
String val = c.get_slice("=", 1);
_request->add_cookie_data(key, val);
}
}
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return 0;
}
int HTTPParser::on_headers_complete() {
ERR_FAIL_COND_V(!_request.is_valid(), 0);
#if MESSAGE_DEBUG
ERR_PRINT("headers_complete");
#endif
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//Check content length, and send error if bigger than server limit (add)
if (_content_type == REQUEST_CONTENT_MULTIPART_FORM_DATA) {
if (_multipart_parser) {
multipart_parser_free(_multipart_parser);
_multipart_parser = NULL;
}
_multipart_parser = multipart_parser_init(_multipart_boundary.ascii().get_data(), _multipart_parser_settings);
multipart_parser_set_data(_multipart_parser, this);
}
_in_header = false;
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_partial_data = "";
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return 0;
}
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int HTTPParser::on_body(const char *at, size_t p_length) {
ERR_FAIL_COND_V(!_request.is_valid(), 0);
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int length = static_cast<int>(p_length);
if (_content_type == REQUEST_CONTENT_MULTIPART_FORM_DATA) {
int wofs = _queued_multipart_form_data.size();
_queued_multipart_form_data.resize(_queued_multipart_form_data.size() + length);
char *w = _queued_multipart_form_data.ptrw();
for (int i = 0; i < length; ++i) {
w[wofs++] = at[i];
}
int processed = process_multipart_data(_queued_multipart_form_data.ptr(), _queued_multipart_form_data.size());
int size = _queued_multipart_form_data.size();
wofs = 0;
for (int i = processed; i < size; ++i) {
w[wofs++] = w[i];
}
_queued_multipart_form_data.resize(_queued_multipart_form_data.size() - processed);
return 0;
}
String s = String::utf8(at, length);
#if MESSAGE_DEBUG
ERR_PRINT("on_body " + s);
#endif
_partial_data += s;
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return 0;
}
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int HTTPParser::on_message_complete() {
ERR_FAIL_COND_V(!_request.is_valid(), 0);
#if MESSAGE_DEBUG
ERR_PRINT("msg_copmlete");
#endif
//if (_content_type == REQUEST_CONTENT_MULTIPART_FORM_DATA) {
// process_multipart_data();
//} else
if (_content_type == REQUEST_CONTENT_URLENCODED) {
process_urlenc_data();
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}
if (!_error) {
_requests.push_back(_request);
}
_request.unref();
if (_multipart_parser) {
multipart_parser_free(_multipart_parser);
_multipart_parser = NULL;
}
_multipart_boundary = "";
_queued_multipart_header_field = "";
_multipart_form_name = "";
_multipart_form_filename = "";
_multipart_form_content_type = "";
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return 0;
}
int HTTPParser::on_chunk_header() {
ERR_FAIL_COND_V(!_request.is_valid(), 0);
#if MESSAGE_DEBUG
ERR_PRINT("chunk_header");
#endif
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return 0;
}
int HTTPParser::on_chunk_complete() {
ERR_FAIL_COND_V(!_request.is_valid(), 0);
#if MESSAGE_DEBUG
ERR_PRINT("chunk_complete");
#endif
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return 0;
}
int HTTPParser::_on_message_begin_cb(http_parser *parser) {
HTTPParser *p = reinterpret_cast<HTTPParser *>(parser->data);
return p->on_message_begin();
}
int HTTPParser::_on_url_cb(http_parser *parser, const char *at, size_t length) {
HTTPParser *p = reinterpret_cast<HTTPParser *>(parser->data);
return p->on_url(at, length);
}
int HTTPParser::_on_status_cb(http_parser *parser, const char *at, size_t length) {
HTTPParser *p = reinterpret_cast<HTTPParser *>(parser->data);
return p->on_status(at, length);
}
int HTTPParser::_on_header_field_cb(http_parser *parser, const char *at, size_t length) {
HTTPParser *p = reinterpret_cast<HTTPParser *>(parser->data);
return p->on_header_field(at, length);
}
int HTTPParser::_on_header_value_cb(http_parser *parser, const char *at, size_t length) {
HTTPParser *p = reinterpret_cast<HTTPParser *>(parser->data);
return p->on_header_value(at, length);
}
int HTTPParser::_on_headers_complete_cb(http_parser *parser) {
HTTPParser *p = reinterpret_cast<HTTPParser *>(parser->data);
return p->on_headers_complete();
}
int HTTPParser::_on_body_cb(http_parser *parser, const char *at, size_t length) {
HTTPParser *p = reinterpret_cast<HTTPParser *>(parser->data);
return p->on_body(at, length);
}
int HTTPParser::_on_message_complete_cb(http_parser *parser) {
HTTPParser *p = reinterpret_cast<HTTPParser *>(parser->data);
return p->on_message_complete();
}
int HTTPParser::_on_chunk_header_cb(http_parser *parser) {
HTTPParser *p = reinterpret_cast<HTTPParser *>(parser->data);
return p->on_chunk_header();
}
int HTTPParser::_on_chunk_complete_cb(http_parser *parser) {
HTTPParser *p = reinterpret_cast<HTTPParser *>(parser->data);
return p->on_chunk_complete();
}
#define MULTIPART_MESSAGE_DEBUG 0
int HTTPParser::on_multipart_header_field_cb(const char *at, size_t length) {
String s = String::utf8(at, length);
_queued_multipart_header_field = s.to_lower();
#if MULTIPART_MESSAGE_DEBUG
ERR_PRINT("on_multipart_header_field_cb " + _queued_multipart_header_field);
#endif
return 0;
}
int HTTPParser::on_multipart_header_value_cb(const char *at, size_t length) {
String s = String::utf8(at, length);
_process_multipart_header_value(s);
#if MULTIPART_MESSAGE_DEBUG
ERR_PRINT("on_multipart_header_value_cb " + s);
#endif
return 0;
}
int HTTPParser::on_multipart_part_data_cb(const char *at, size_t length) {
#if MULTIPART_MESSAGE_DEBUG
ERR_PRINT("on_multipart_part_data_cb");
#endif
if (_upload_file_access) {
_upload_file_access->store_buffer((const uint8_t *)at, (uint64_t)length);
_current_upload_files_size += length;
if (_current_upload_files_size >= request_max_file_upload_size) {
_error = true;
#if PROTOCOL_ERROR_LOGGING_ENABLED
PLOG_ERR("_current_upload_files_size >= request_max_file_upload_size");
#endif
_upload_file_access->close();
memdelete(_upload_file_access);
_upload_file_access = NULL;
DirAccess *d = DirAccess::create_for_path(_upload_file_full_path.get_base_dir());
if (d) {
d->remove(_upload_file_full_path);
memdelete(d);
}
}
} else {
int l = static_cast<int>(length);
int mfdofs = _multipart_form_data.size();
_multipart_form_data.resize(mfdofs + length);
char *w = _multipart_form_data.ptrw();
for (int i = 0; i < l; ++i) {
w[mfdofs++] = at[i];
}
}
return 0;
}
int HTTPParser::on_multipart_part_data_begin_cb() {
#if MULTIPART_MESSAGE_DEBUG
ERR_PRINT("on_multipart_part_data_begin_cb");
#endif
return 0;
}
int HTTPParser::on_multipart_headers_complete_cb() {
#if MULTIPART_MESSAGE_DEBUG
ERR_PRINT("on_multipart_headers_complete_cb");
#endif
return 0;
}
int HTTPParser::on_multipart_part_data_end_cb() {
#if MULTIPART_MESSAGE_DEBUG
ERR_PRINT("on_multipart_part_data_end_cb");
#endif
if (_multipart_form_is_file) {
if (_upload_file_access) {
_upload_file_access->close();
memdelete(_upload_file_access);
_upload_file_access = NULL;
_request->add_file_temp_file(_multipart_form_name, _multipart_form_filename, _upload_file_full_path);
} else {
if (_multipart_form_data.size() > 0) {
PoolByteArray file_data;
int len = _multipart_form_data.size();
file_data.resize(len);
PoolByteArray::Write w = file_data.write();
const char *r = _multipart_form_data.ptr();
for (int i = 0; i < len; i++) {
w[i] = r[i];
}
w.release();
_request->add_file_memory(_multipart_form_name, _multipart_form_filename, file_data);
}
}
} else {
String s = String::utf8(_multipart_form_data.ptr(), _multipart_form_data.size());
_request->add_post_parameter(_multipart_form_name, s);
}
_multipart_form_is_file = false;
_multipart_form_data.clear();
return 0;
}
int HTTPParser::on_multipart_body_end_cb() {
#if MULTIPART_MESSAGE_DEBUG
ERR_PRINT("on_multipart_body_end_cb");
#endif
return 0;
}
int HTTPParser::_on_multipart_header_field_cb(multipart_parser *parser, const char *at, size_t length) {
HTTPParser *p = reinterpret_cast<HTTPParser *>(multipart_parser_get_data(parser));
return p->on_multipart_header_field_cb(at, length);
}
int HTTPParser::_on_multipart_header_value_cb(multipart_parser *parser, const char *at, size_t length) {
HTTPParser *p = reinterpret_cast<HTTPParser *>(multipart_parser_get_data(parser));
return p->on_multipart_header_value_cb(at, length);
}
int HTTPParser::_on_multipart_part_data_cb(multipart_parser *parser, const char *at, size_t length) {
HTTPParser *p = reinterpret_cast<HTTPParser *>(multipart_parser_get_data(parser));
return p->on_multipart_part_data_cb(at, length);
}
int HTTPParser::_on_multipart_part_data_begin_cb(multipart_parser *parser) {
HTTPParser *p = reinterpret_cast<HTTPParser *>(multipart_parser_get_data(parser));
return p->on_multipart_part_data_begin_cb();
}
int HTTPParser::_on_multipart_headers_complete_cb(multipart_parser *parser) {
HTTPParser *p = reinterpret_cast<HTTPParser *>(multipart_parser_get_data(parser));
return p->on_multipart_headers_complete_cb();
}
int HTTPParser::_on_multipart_part_data_end_cb(multipart_parser *parser) {
HTTPParser *p = reinterpret_cast<HTTPParser *>(multipart_parser_get_data(parser));
return p->on_multipart_part_data_end_cb();
}
int HTTPParser::_on_multipart_body_end_cb(multipart_parser *parser) {
HTTPParser *p = reinterpret_cast<HTTPParser *>(multipart_parser_get_data(parser));
return p->on_multipart_body_end_cb();
}