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#include <stdexcept>
#include <regex>
#include <string>
//#include <typeinfo>
#include "HttpCodec.hh"
#include "loggers.hh"
#include "LibItsHttp_TypesAndValues.hh"
int HttpCodec::encode (const LibItsHttp__TypesAndValues::HttpMessage& msg, OCTETSTRING& data)
{
loggers::get_instance().log_msg(">>> HttpCodec::encode: ", (const Base_Type&)msg);
TTCN_EncDec::clear_error();
TTCN_Buffer encoding_buffer;
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("HttpCodec::encode: Unbound HttpMessage");
return -1;
}
data = OCTETSTRING(encoding_buffer.get_len(), encoding_buffer.get_data());
loggers::get_instance().log_msg("<<< HttpCodec::encode: data=", data);
return result;
}
int HttpCodec::decode (const OCTETSTRING& data, LibItsHttp__TypesAndValues::HttpMessage& msg, Params* params)
{
loggers::get_instance().log_msg(">>> HttpCodec::decode: data=", data);
TTCN_EncDec::clear_error();
TTCN_Buffer decoding_buffer(data);
loggers::get_instance().log_to_hexa("HttpCodec::decode: decoding_buffer=", decoding_buffer);
_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("HttpCodec::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("HttpCodec::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;
if (m.size() != 5) {
loggers::get_instance().error("HttpCodec::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);
CHARSTRING body("");
if (decode_body(decoding_buffer, body) == -1) {
response.body().set_to_omit();
} else if (body.lengthof() == 0) {
response.body().set_to_omit();
} else {
// TODO
}
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("HttpCodec::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;
loggers::get_instance().log_to_hexa("Before decoding Body: ", decoding_buffer);
CHARSTRING body("");
if (decode_body(decoding_buffer, body) == -1) {
request.body().set_to_omit();
} else if (body.lengthof() == 0) {
request.body().set_to_omit();
} else {
// TODO
}
msg.request() = request;
}
loggers::get_instance().log_msg("<<< HttpCodec::decode: ", (const Base_Type&)msg);
return 0;
}
catch(const std::logic_error& e) {
return -1;
}
}
int HttpCodec::encode_request(const LibItsHttp__TypesAndValues::Request& p_request, TTCN_Buffer& p_encoding_buffer)
{
loggers::get_instance().log_msg(">>> HttpCodec::encode_request: ", (const Base_Type&)p_request);
const OPTIONAL<CHARSTRING>& v = p_request.body();
CHARSTRING body("");
if (v.ispresent()) {
body = static_cast<const CHARSTRING&>(*v.get_opt_value());
loggers::get_instance().log_msg("HttpCodec::encode_request: body: ", body);
}
// 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("HttpCodec::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) {
loggers::get_instance().log("HttpCodec::encode_request: body length: %d", body.lengthof());
p_encoding_buffer.put_cs(int2str(body.lengthof()));
} else {
if (header.header__value().size_of() > 0) {
loggers::get_instance().log_msg("HttpCodec::encode_request: Processing value ", header.header__value()[0]);
p_encoding_buffer.put_cs(header.header__value()[0]);
int j = 1;
while (j < header.header__value().size_of()) {
p_encoding_buffer.put_cs("; ");
loggers::get_instance().log_msg("HttpCodec::encode_request: Processing value ", header.header__value()[j]);
p_encoding_buffer.put_cs(header.header__value()[j]);
j += 1;
} // End of 'while' statement
}
}
p_encoding_buffer.put_cs("\r\n");
} // End of 'for' statement
if (body.lengthof() != 0) {
p_encoding_buffer.put_cs(body);
}
p_encoding_buffer.put_cs("\r\n");
return 0;
}
int HttpCodec::decode_headers(TTCN_Buffer& decoding_buffer, LibItsHttp__TypesAndValues::HeaderLines& headers) {
loggers::get_instance().log(">>> HttpCodec::decode_headers");
loggers::get_instance().log_to_hexa("HttpCodec::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("HttpCodec::decode_headers: ", cstr);
LibItsHttp__TypesAndValues::HeaderLine header;
if (decode_header(cstr, header) == -1) {
loggers::get_instance().warning("HttpCodec::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("<<< HttpCodec::decode_headers: ", headers);
return 0;
case -1:
loggers::get_instance().warning("HttpCodec::decode_headers: Failed to decode headers");
return -1;
} // End of 'switch' statement
} // End of 'while' statement
}
int HttpCodec::decode_header(CHARSTRING& header_line, LibItsHttp__TypesAndValues::HeaderLine& header) {
loggers::get_instance().log_msg(">>> HttpCodec::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) {
return -1;
}
header.header__name() = CHARSTRING(m[1].str().c_str());
for (unsigned int j = 0; j < m.size(); j++) {
if (m[j + 2].str().length() == 0) {
break;
}
header.header__value()[j] = CHARSTRING(m[j + 2].str().c_str());
}
return 0;
}
catch(const std::logic_error& e) {
return -1;
}
}
int HttpCodec::decode_body(TTCN_Buffer& decoding_buffer, CHARSTRING& body) {
loggers::get_instance().log(">>> HttpCodec::decode_body");
loggers::get_instance().log_to_hexa("HttpCodec::decode_body", decoding_buffer);
loggers::get_instance().log_msg("<<< HttpCodec::decode_body: ", body);
return -1;
}
int HttpCodec::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 emplty 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
}