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#include <stdexcept>
#include <regex>
#include <string>
#include "codec_stack_builder.hh"
#include "http_codec.hh"
#include "loggers.hh"
#include "LibItsHttp_TypesAndValues.hh"
#include "LibItsHttp_MessageBodyTypes.hh"
#include "LibItsHttp_XmlMessageBodyTypes.hh"
int http_codec::encode (const LibItsHttp__TypesAndValues::HttpMessage& msg, OCTETSTRING& data)
{
loggers::get_instance().log_msg(">>> http_codec::encode: ", (const Base_Type&)msg);
TTCN_EncDec::clear_error();
TTCN_Buffer encoding_buffer;
_ec.reset();
int result;
if (msg.ischosen(LibItsHttp__TypesAndValues::HttpMessage::ALT_request)) {
result = encode_request(msg.request(), encoding_buffer);
} else if (msg.ischosen(LibItsHttp__TypesAndValues::HttpMessage::ALT_response)) {
result = encode_response(msg.response(), encoding_buffer);
} else {
loggers::get_instance().warning("http_codec::encode: Unbound HttpMessage");
return -1;
}
data = OCTETSTRING(encoding_buffer.get_len(), encoding_buffer.get_data());
loggers::get_instance().log_msg("<<< http_codec::encode: data=", data);
return result;
}
int http_codec::decode (const OCTETSTRING& data, LibItsHttp__TypesAndValues::HttpMessage& msg, params* params)
{
loggers::get_instance().log_msg(">>> http_codec::decode: data=", data);
TTCN_EncDec::clear_error();
TTCN_Buffer decoding_buffer(data);
loggers::get_instance().log_to_hexa("http_codec::decode: decoding_buffer=", decoding_buffer);
_dc.reset();
_params = params;
// Get the first line (e.g. HTTP/1.1 302 Found or POST / HTTP/1.1)
CHARSTRING message_id;
if (get_line(decoding_buffer, message_id) == -1) {
return -1;
}
loggers::get_instance().log_msg("http_codec::decode: message_id: ", message_id);
// Extract parameters
try {
std::string str(static_cast<const char*>(message_id));
std::regex rgx ("\\s*(\\w+)/");
std::sregex_iterator begin(str.cbegin(), str.cend(), rgx);
std::smatch m = *begin;
loggers::get_instance().log("http_codec::decode: %d - %s", m.size(), m[0].str().c_str());
if (m[0].str().compare("HTTP/") == 0) { // HTTP response
LibItsHttp__TypesAndValues::Response response;
std::regex rgx ("\\s*HTTP/(\\d+)\\.(\\d+)\\s+(\\d+)\\s+(\\w+)*");
std::sregex_iterator begin(str.cbegin(), str.cend(), rgx);
std::smatch m = *begin;
loggers::get_instance().log("http_codec::decode: Process response: %d", m.size());
if (m.size() != 5) {
loggers::get_instance().error("http_codec::decode: Unsupported tag");
return -1;
}
response.version__major() = std::stoi(m[1].str().c_str());
response.version__minor() = std::stoi(m[2].str().c_str());
response.statuscode() = std::stoi(m[3].str().c_str());
response.statustext() = CHARSTRING(m[4].str().c_str());
LibItsHttp__TypesAndValues::HeaderLines headers;
decode_headers(decoding_buffer, headers);
response.header() = headers;
loggers::get_instance().log_to_hexa("Before decoding Body: ", decoding_buffer);
LibItsHttp__MessageBodyTypes::HttpMessageBody body;
if (decode_body(decoding_buffer, body) == -1) {
response.body().set_to_omit();
} else {
response.body() = OPTIONAL<LibItsHttp__MessageBodyTypes::HttpMessageBody>(body);
}
msg.response() = response;
} else { // HTTP request
LibItsHttp__TypesAndValues::Request request;
std::regex rgx ("\\s*(\\w+)\\s+(.+)\\s+HTTP/(\\d)\\.(\\d)");
std::sregex_iterator begin(str.cbegin(), str.cend(), rgx);
std::smatch m = *begin;
if (m.size() != 5) {
loggers::get_instance().error("http_codec::decode: Unsupported tag");
return -1;
}
request.method() = CHARSTRING(m[1].str().c_str());
request.uri() = CHARSTRING(m[2].str().c_str());
request.version__major() = std::stoi(m[3].str().c_str());
request.version__minor() = std::stoi(m[4].str().c_str());
LibItsHttp__TypesAndValues::HeaderLines headers;
decode_headers(decoding_buffer, headers);
request.header() = headers;
OPTIONAL<LibItsHttp__MessageBodyTypes::HttpMessageBody> body;
body.set_to_omit();
if (decode_body(decoding_buffer, body) == -1) {
request.body().set_to_omit();
} else {
request.body() = body;
}
msg.request() = request;
}
loggers::get_instance().log_msg("<<< http_codec::decode: ", (const Base_Type&)msg);
return 0;
}
catch(const std::logic_error& e) {
return -1;
}
}
int http_codec::encode_request(const LibItsHttp__TypesAndValues::Request& p_request, TTCN_Buffer& p_encoding_buffer)
{
loggers::get_instance().log_msg(">>> http_codec::encode_request: ", (const Base_Type&)p_request);
const OPTIONAL<LibItsHttp__MessageBodyTypes::HttpMessageBody>& v = p_request.body();
OCTETSTRING os;
if (v.ispresent()) {
const LibItsHttp__MessageBodyTypes::HttpMessageBody& body = static_cast<const LibItsHttp__MessageBodyTypes::HttpMessageBody&>(*v.get_opt_value());
loggers::get_instance().log_msg("http_codec::encode_request: body: ", body);
if (encode_body(body, os) == -1) {
_ec.length = 0;
}
}
// Encode generic part
p_encoding_buffer.put_cs(p_request.method());
p_encoding_buffer.put_c(' ');
p_encoding_buffer.put_cs(p_request.uri());
p_encoding_buffer.put_cs(" HTTP/");
p_encoding_buffer.put_cs(int2str(p_request.version__major()));
p_encoding_buffer.put_c('.');
p_encoding_buffer.put_cs(int2str(p_request.version__minor()));
p_encoding_buffer.put_cs("\r\n");
// Encode headers
const LibItsHttp__TypesAndValues::HeaderLines& headers = p_request.header();
for (int i = 0; i < headers.size_of(); i++) {
const LibItsHttp__TypesAndValues::HeaderLine& header = headers[i];
loggers::get_instance().log_msg("http_codec::encode_request: Processing header ", header.header__name());
p_encoding_buffer.put_cs(header.header__name());
p_encoding_buffer.put_cs(": ");
if (std::string(static_cast<const char*>(header.header__name())).compare("Content-Length") == 0) {
if (_ec.length != 0) {
p_encoding_buffer.put_cs(int2str(_ec.length + 2/*Stand for the last CRLF*/));
} else {
p_encoding_buffer.put_cs("0");
}
_ec.is_content_length_present = 0x01;
} else {
const OPTIONAL<LibItsHttp__TypesAndValues::charstring__list>& o = header.header__value();
if (o.ispresent()) {
const LibItsHttp__TypesAndValues::charstring__list& v = dynamic_cast<const OPTIONAL<LibItsHttp__TypesAndValues::charstring__list> &>(o);
if (v.size_of() > 0) {
loggers::get_instance().log_msg("http_codec::encode_request: Processing value ", v[0]);
p_encoding_buffer.put_cs(v[0]);
int j = 1;
while (j < v.size_of()) {
p_encoding_buffer.put_cs(", ");
loggers::get_instance().log_msg("http_codec::encode_request: Processing value ", v[j]);
p_encoding_buffer.put_cs(v[j]);
j += 1;
} // End of 'while' statement
}
} // else, do not include it
}
p_encoding_buffer.put_cs("\r\n");
} // End of 'for' statement
p_encoding_buffer.put_cs("\r\n");
if (_ec.length != 0) {
p_encoding_buffer.put_os(os);
p_encoding_buffer.put_cs("\r\n");
}
return 0;
}
int http_codec::encode_response (const LibItsHttp__TypesAndValues::Response& p_response, TTCN_Buffer& p_encoding_buffer) {
loggers::get_instance().log_msg(">>> http_codec::encode_response: ", (const Base_Type&)p_response);
const OPTIONAL<LibItsHttp__MessageBodyTypes::HttpMessageBody>& v = p_response.body();
OCTETSTRING os;
if (v.ispresent()) {
const LibItsHttp__MessageBodyTypes::HttpMessageBody& body = static_cast<const LibItsHttp__MessageBodyTypes::HttpMessageBody&>(*v.get_opt_value());
loggers::get_instance().log_msg("http_codec::encode_response: body: ", body);
if (encode_body(body, os) == -1) {
_ec.length = 0;
}
}
// Encode generic part
p_encoding_buffer.put_cs("HTTP/");
p_encoding_buffer.put_cs(int2str(p_response.version__major()));
p_encoding_buffer.put_c('.');
p_encoding_buffer.put_cs(int2str(p_response.version__minor()));
p_encoding_buffer.put_cs(" ");
p_encoding_buffer.put_cs(int2str(p_response.statuscode()));
p_encoding_buffer.put_cs(" ");
if (p_response.statustext().lengthof() != 0) {
p_encoding_buffer.put_cs(p_response.statustext());
}
p_encoding_buffer.put_cs("\r\n");
// Encode headers
const LibItsHttp__TypesAndValues::HeaderLines& headers = p_response.header();
for (int i = 0; i < headers.size_of(); i++) {
const LibItsHttp__TypesAndValues::HeaderLine& header = headers[i];
loggers::get_instance().log_msg("http_codec::encode_response: Processing header ", header.header__name());
p_encoding_buffer.put_cs(header.header__name());
p_encoding_buffer.put_cs(": ");
if (std::string(static_cast<const char*>(header.header__name())).compare("Content-Length") == 0) {
if (_ec.length != 0) {
p_encoding_buffer.put_cs(int2str(_ec.length + 2/*Stand for the last CRLF*/));
} else {
p_encoding_buffer.put_cs("0");
}
_ec.is_content_length_present = 0x01;
} else {
const OPTIONAL<LibItsHttp__TypesAndValues::charstring__list>& o = header.header__value();
if (o.ispresent()) {
const LibItsHttp__TypesAndValues::charstring__list& v = dynamic_cast<const OPTIONAL<LibItsHttp__TypesAndValues::charstring__list> &>(o);
if (v.size_of() > 0) {
loggers::get_instance().log_msg("http_codec::encode_response: Processing value ", v[0]);
p_encoding_buffer.put_cs(v[0]);
int j = 1;
while (j < v.size_of()) {
p_encoding_buffer.put_cs(", ");
loggers::get_instance().log_msg("http_codec::encode_response: Processing value ", v[j]);
p_encoding_buffer.put_cs(v[j]);
j += 1;
} // End of 'while' statement
}
} // else, do not include it
}
p_encoding_buffer.put_cs("\r\n");
} // End of 'for' statement
p_encoding_buffer.put_cs("\r\n");
if (_ec.length != 0) {
p_encoding_buffer.put_os(os);
p_encoding_buffer.put_cs("\r\n");
}
return 0;
}
int http_codec::decode_headers(TTCN_Buffer& decoding_buffer, LibItsHttp__TypesAndValues::HeaderLines& headers) {
loggers::get_instance().log(">>> http_codec::decode_headers");
loggers::get_instance().log_to_hexa("http_codec::decode_headers", decoding_buffer);
CHARSTRING cstr;
int i = 0;
while (true) {
switch(get_line(decoding_buffer, cstr, true)) {
case 0: {
loggers::get_instance().log_msg("http_codec::decode_headers: ", cstr);
LibItsHttp__TypesAndValues::HeaderLine header;
if (decode_header(cstr, header) == -1) {
loggers::get_instance().warning("http_codec::decode_headers: Failed to decode header %s", static_cast<const char*>(cstr));
return -1;
}
headers[i++] = header;
}
break;
case 1:
loggers::get_instance().log_msg("<<< http_codec::decode_headers: ", headers);
return 0;
case -1:
loggers::get_instance().warning("http_codec::decode_headers: Failed to decode headers");
return -1;
} // End of 'switch' statement
} // End of 'while' statement
}
int http_codec::decode_header(CHARSTRING& header_line, LibItsHttp__TypesAndValues::HeaderLine& header) {
loggers::get_instance().log_msg(">>> http_codec::decode_header", header_line);
try {
std::string str(static_cast<const char*>(header_line));
std::regex rgx ("([0-9a-zA-Z-]+)\\:\\s+(.+)(,(.+))*");
std::sregex_iterator begin(str.cbegin(), str.cend(), rgx);
std::smatch m = *begin;
if (m.size() < 5) {
loggers::get_instance().warning("http_codec::decode_header: Failed to decode header %s", str.c_str());
return -1;
}
loggers::get_instance().log("http_codec::decode_header: %d", m.size());
header.header__name() = CHARSTRING(m[1].str().c_str());
LibItsHttp__TypesAndValues::charstring__list v;
for (unsigned int j = 0; j < m.size(); j++) {
if (m[j + 2].str().length() == 0) {
break;
}
v[j] = CHARSTRING(m[j + 2].str().c_str());
} // End of 'for' statement
header.header__value() = OPTIONAL<LibItsHttp__TypesAndValues::charstring__list>(v);
if (m[1].str().compare("Content-Length") == 0) {
// Save the the body length
loggers::get_instance().log("http_codec::decode_header: decoded Content-Length %s", m[2].str().c_str());
_dc.length = std::stoi(m[2].str());
}
return 0;
}
catch(const std::logic_error& e) {
return -1;
}
}
int http_codec::encode_body(const LibItsHttp__MessageBodyTypes::HttpMessageBody& p_message_body, OCTETSTRING& p_encoding_buffer) {
loggers::get_instance().log_msg(">>> http_codec::encode_body: ", (const Base_Type&)p_message_body);
loggers::get_instance().log("http_codec::encode_body: # of codecs=%d", _codecs.size());
if (p_message_body.ischosen(LibItsHttp__MessageBodyTypes::HttpMessageBody::ALT_ms__body)) {
p_encoding_buffer = p_message_body.ms__body();
} else if (p_message_body.ischosen(LibItsHttp__MessageBodyTypes::HttpMessageBody::ALT_html__body)) {
p_encoding_buffer = OCTETSTRING(p_message_body.html__body().lengthof(), (unsigned char*)static_cast<const char*>(p_message_body.html__body()));
} else if (p_message_body.ischosen(LibItsHttp__MessageBodyTypes::HttpMessageBody::ALT_text__body)) {
p_encoding_buffer = OCTETSTRING(p_message_body.text__body().lengthof(), (unsigned char*)static_cast<const char*>(p_message_body.text__body()));
} else if (p_message_body.ischosen(LibItsHttp__MessageBodyTypes::HttpMessageBody::ALT_xml__body)) {
loggers::get_instance().error("http_codec::encode_body: Failed to encode HTTP message body");
const LibItsHttp__XmlMessageBodyTypes::XmlBody& xml_body = p_message_body.xml__body();
if (xml_body.ischosen(LibItsHttp__XmlMessageBodyTypes::XmlBody::ALT_raw)) {
p_encoding_buffer = OCTETSTRING(xml_body.raw().lengthof(), (unsigned char*)static_cast<const char*>(xml_body.raw()));
} else {
std::map<std::string, std::unique_ptr<codec<Record_Type, Record_Type> > >::const_iterator it = _codecs.find("held");
if (it != _codecs.cend()) {
loggers::get_instance().log("http_codec::encode_body: Call 'held_codec'");
_codecs["held"]->encode((Record_Type&)xml_body, p_encoding_buffer);
} else {
loggers::get_instance().warning("http_codec::encode_body: Unsupported HTTP codec, use raw field as default");
p_encoding_buffer = OCTETSTRING(xml_body.raw().lengthof(), (unsigned char*)static_cast<const char*>(xml_body.raw()));
// TODO Add new HTTP message codec here
}
}
} else {
loggers::get_instance().log("http_codec::encode_body: Failed to encode HTTP message body");
return -1;
}
loggers::get_instance().log_msg("http_codec::encode_body: HTTP message ", p_encoding_buffer);
_ec.length = p_encoding_buffer.lengthof();
loggers::get_instance().log("http_codec::encode_body: HTTP message length: %d", _ec.length);
return 0;
}
int http_codec::decode_body(TTCN_Buffer& decoding_buffer, LibItsHttp__MessageBodyTypes::HttpMessageBody& message_body) {
loggers::get_instance().log(">>> http_codec::decode_body");
loggers::get_instance().log_to_hexa("http_codec::decode_body", decoding_buffer);
loggers::get_instance().log("http_codec::decode_body: # of codecs=%d", _codecs.size());
// Sanity check
if (decoding_buffer.get_len() - decoding_buffer.get_pos() <= 0) {
return -1;
}
OCTETSTRING s(decoding_buffer.get_len() - decoding_buffer.get_pos(), decoding_buffer.get_data() + decoding_buffer.get_pos());
loggers::get_instance().log_msg("http_codec::decode_body: raw body=", s);
// Align the payload length with the specified Content-lenght value
loggers::get_instance().log("http_codec::decode_body: _dc.length=%d - body length=%d", _dc.length, s.lengthof());
OCTETSTRING body;
if (_dc.length != 0) {
const unsigned char* p = static_cast<const unsigned char *>(s);
if ((unsigned int)s.lengthof() <= _dc.length) {
body = OCTETSTRING(s.lengthof(), p);
} else {
body = OCTETSTRING(_dc.length, p);
}
} else {
loggers::get_instance().warning("http_codec::decode_body: No Conten-Length header, process all remaining bytes");
body = s;
}
loggers::get_instance().log_msg("http_codec::decode_body: Aligned body=", body);
// Remove CRLF if any
int counter = 0;
if ((body[body.lengthof() - 1].get_octet() == 0x0d) || (body[body.lengthof() - 1].get_octet() == 0x0a)) {
counter += 1;
if ((body[body.lengthof() - 2].get_octet() == 0x0d) || (body[body.lengthof() - 2].get_octet() == 0x0a)) {
counter += 1;
}
}
loggers::get_instance().log("http_codec::decode_body: Counter=%d", counter);
body = OCTETSTRING(body.lengthof() - counter, static_cast<const unsigned char*>(body));
loggers::get_instance().log_msg("http_codec::decode_body: Finalised body=", body);
// Check if HTTP message body contains binary characters
for (int i = 0; i < body.lengthof(); i++) {
unsigned char c = body[i].get_octet();
if (!std::isprint(c) && !std::isspace(c) && !std::ispunct(c)) {
loggers::get_instance().log("http_codec::decode_body: Byte #%d is not printable: 0x%02x", i, body[i].get_octet());
_dc.is_binary = 0x01;
break;
}
} // End of 'for' statement
loggers::get_instance().log("http_codec::decode_body: Binary mode: %x", _dc.is_binary);
LibItsHttp__MessageBodyTypes::HttpMessageBody v;
if (_dc.is_binary == 0x01) {
message_body.ms__body() = body;
} else {
// Convert into string
params p;
p["decode_str"] = std::string(static_cast<const unsigned char*>(body), body.lengthof() + static_cast<const unsigned char*>(body));
// Try to identify xml
if (p["decode_str"].find("<?xml version=") != std::string::npos) {
loggers::get_instance().log("http_codec::decode_body: Find xml message");
LibItsHttp__XmlMessageBodyTypes::XmlBody xml_body;
// TODO To be refined adding a string identifier to check which codec to use. E.g. held_code.id() returns "xmlns=\"urn:ietf:params:xml:ns:geopriv:held\">"
if (p["decode_str"].find("xmlns=\"urn:ietf:params:xml:ns:geopriv:held\">") != std::string::npos) {
loggers::get_instance().log("http_codec::decode_body: Find 'urn:ietf:params:xml:ns:geopriv:held'");
if (_codecs["held"].get() != nullptr) {
loggers::get_instance().log("http_codec::decode_body: Call 'held_codec'");
if (_codecs["held"]->decode(body, (Record_Type&)xml_body, &p) == -1) {
loggers::get_instance().warning("http_codec::decode_body: Failed to decode HELD message");
xml_body.raw() = CHARSTRING(body.lengthof(), (char*)static_cast<const unsigned char*>(body));
} else {
loggers::get_instance().log_msg("http_codec::decode_body: Decoded message:", xml_body);
message_body.xml__body() = xml_body;
}
} else {
loggers::get_instance().warning("http_codec::decode_body: No codec for HELD");
xml_body.raw() = CHARSTRING(body.lengthof(), (char*)static_cast<const unsigned char*>(body));
}
message_body.xml__body() = xml_body;
}
} else if (p["decode_str"].find("<html>") != std::string::npos) { // Try to identify HTML
loggers::get_instance().log("http_codec::decode_body: Find html message");
LibItsHttp__MessageBodyTypes::HtmlBody html_body;
loggers::get_instance().error("http_codec::decode_body: Not supported");
} else {
loggers::get_instance().log("http_codec::decode_body: Use textBdy as default");
LibItsHttp__MessageBodyTypes::TextBody text_body;
message_body.text__body() = CHARSTRING(body.lengthof(), (char*)static_cast<const unsigned char*>(body));
}
}
return 0;
}
int http_codec::get_line(TTCN_Buffer& buffer, CHARSTRING& to, const bool concatenate_header_lines) {
unsigned int i = 0;
const unsigned char *cc_to = buffer.get_read_data();
// Sanity checks
if(buffer.get_read_len() == 0) {
return -1;
}
while (true) {
// Skip spaces, and empty lines
for( ; i < buffer.get_read_len() && cc_to[i] != '\0' && cc_to[i] != '\r' && cc_to[i] != '\n'; i++);
if(i >= buffer.get_read_len()) { // No more characters to process
to = CHARSTRING("");
return -1;
} else if(cc_to[i] == '\n') { // New line found, we don't care is '\r' is missing
if ((i > 0) && ((i + 1) < buffer.get_read_len()) && concatenate_header_lines && ((cc_to[i + 1] == ' ') || (cc_to[i + 1] == '\t'))) {
i += 1; // Skip it
} else {
to = CHARSTRING(i, (const char*)cc_to);
buffer.set_pos(buffer.get_pos() + i + 1);
return i == 0 ? 1 : 0;
}
} else {
if ((i + 1) < buffer.get_read_len() && cc_to[i + 1] != '\n') {
return -1;
} else if(i > 0 && (i + 2) < buffer.get_read_len() && concatenate_header_lines && (cc_to[i+2] == ' ' || cc_to[i+2] == '\t')) {
i += 2;
} else {
to = CHARSTRING(i, (const char*)cc_to);
buffer.set_pos(buffer.get_pos() + i + 2);
return i == 0 ? 1 : 0;
}
}
} // End of 'while' statement
}
void http_codec::set_payload_codecs(const std::string& p_codecs) {
loggers::get_instance().log(">>> http_codec::set_payload_codecs: %s", p_codecs.c_str());
// Sanity check
if (p_codecs.length() == 0) {
return;
}
// Extract codecs
try {
std::regex rgx("(\\w+)(:(\\w+))*(;((\\w+)(:(\\w+))*))*");
std::sregex_iterator begin(p_codecs.cbegin(), p_codecs.cend(), rgx);
std::sregex_iterator end = std::sregex_iterator();
// E.g. 9 - xml - :held_codec - held_codec - ;html:html_codec - html:html_codec - html - :html_codec - html_codec
for (std::sregex_iterator it = begin; it != end; ++it) {
std::smatch m = *it;
loggers::get_instance().log("http_codec::set_payload_codecs: %d - %s - %s - %s - %s - %s - %s - %s - %s", m.size(), m[1].str().c_str(), m[2].str().c_str(), m[3].str().c_str(), m[4].str().c_str(), m[5].str().c_str(), m[6].str().c_str(), m[7].str().c_str(), m[8].str().c_str());
for (unsigned int j = 1; j < m.size() - 1; j += 5) { // Exclude m[0]
loggers::get_instance().log("http_codec::set_payload_codecs: insert (%s, %s), j = %d", m[j].str().c_str(), m[j + 2].str().c_str(), j);
std::string key(m[j].str());
_codecs.insert(std::make_pair(key, std::unique_ptr<codec<Record_Type, Record_Type> >(codec_stack_builder::get_instance()->get_codec(m[j + 2].str().c_str()))));
} // End of 'for' statement
} // End of 'for' statement
//loggers::get_instance().log("http_codec::set_payload_codecs: _codecs length=%d", _codecs.size());
}
catch(const std::logic_error& e){
loggers::get_instance().warning("http_codec::set_payload_codecs: std::logic_error: %s", e.what());
_codecs.clear();
}
}