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/*
* Ricochet - A minimalist CLI web browser for fast, distraction-free navigation.
* Copyright (C) 2026 Richard Qin
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#include "ricochet/net/http_client.hh"
#include "ricochet/net/config.hh"
#include "ricochet/net/cookie_jar.hh"
#include "ricochet/net/http_utils.hh"
#include "ricochet/net/ssl_socket.hh"
#include "ricochet/net/sys/address.hh"
#include "ricochet/net/sys/socket.hh"
#include "ricochet/net/url_parser.hh"
#include <cstddef>
#include <format>
#include <string>
#include <string_view>
namespace ricochet::net {
namespace {
struct FetchResult
{
std::string raw_response {};
std::string error {};
};
FetchResult do_network_request( const std::string& host,
const std::string& service, // NOLINT(bugprone-easily-swappable-parameters)
const std::string& path, // NOLINT(bugprone-easily-swappable-parameters)
bool is_https,
const std::string& method, // NOLINT(bugprone-easily-swappable-parameters)
const std::string& body,
const std::string& cookie_header ) // NOLINT(bugprone-easily-swappable-parameters)
{
FetchResult res;
try {
const Address server_addr( host, service );
std::string request = std::format( "{} {} HTTP/1.1\r\n"
"Host: {}\r\n"
"User-Agent: {}\r\n"
"Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8\r\n"
"Accept-Language: en-US,en;q=0.9\r\n"
"DNT: 1\r\n"
"{}"
"Connection: close\r\n",
method,
path,
host,
get_browser_config().user_agent,
cookie_header );
if ( !body.empty() ) {
request += std::format( "Content-Length: {}\r\n"
"Content-Type: application/x-www-form-urlencoded\r\n",
body.length() );
}
request += "\r\n" + body;
if ( is_https ) {
SSLSocket ssl_socket;
ssl_socket.connect( server_addr, host );
for ( size_t bw = 0; bw < request.size(); ) {
bw += ssl_socket.write( request.substr( bw ) );
}
while ( !ssl_socket.eof() ) {
std::string buffer;
ssl_socket.read( buffer );
res.raw_response += buffer;
}
} else {
TCPSocket tcp_socket;
tcp_socket.connect( server_addr );
for ( size_t bw = 0; bw < request.size(); ) {
bw += tcp_socket.write( request.substr( bw ) );
}
while ( !tcp_socket.eof() ) {
std::string buffer;
tcp_socket.read( buffer );
res.raw_response += buffer;
}
}
} catch ( const std::exception& e ) {
res.error = std::string( "Network Error: " ) + e.what();
}
return res;
}
void parse_response_headers( const std::string& raw_response, // NOLINT(bugprone-easily-swappable-parameters)
const std::string& host, // NOLINT(bugprone-easily-swappable-parameters)
HttpResponse& response,
std::string& headers )
{
const auto header_end = raw_response.find( "\r\n\r\n" );
headers = ( header_end != std::string::npos ) ? raw_response.substr( 0, header_end ) : raw_response;
update_cookies( headers, host );
if ( header_end != std::string::npos ) {
response.body = raw_response.substr( header_end + 4 );
std::size_t ct_pos = headers.find( "Content-Type: " );
if ( ct_pos == std::string::npos ) {
ct_pos = headers.find( "content-type: " );
}
if ( ct_pos != std::string::npos ) {
ct_pos += 14;
const std::size_t end_pos = headers.find( '\r', ct_pos );
if ( end_pos != std::string::npos ) {
response.content_type = headers.substr( ct_pos, end_pos - ct_pos );
}
}
if ( raw_response.size() >= 12 ) {
try {
response.status_code = std::stoi( raw_response.substr( 9, 3 ) );
} catch ( ... ) {
response.status_code = 0;
}
}
} else {
response.body = raw_response;
response.status_code = 0;
}
}
void sanitize_response_body( HttpResponse& response, const std::string& raw_response )
{
if ( raw_response.contains( "Transfer-Encoding: chunked" ) ) {
response.body = dechunk( response.body );
}
std::string ct_lower = response.content_type;
for ( char& c : ct_lower ) {
if ( c >= 'A' && c <= 'Z' ) {
c = static_cast<char>( c + 32 );
}
}
if ( ct_lower.starts_with( "text/" ) || ct_lower.contains( "xml" ) ) {
response.body = remove_html_comments( response.body );
response.body = remove_tag_blocks( response.body, "script" );
response.body = remove_tag_blocks( response.body, "style" );
}
}
} // namespace
std::expected<HttpResponse, std::string>
HttpClient::fetch( // NOLINT(readability-convert-member-functions-to-static)
std::string_view url, // NOLINT(bugprone-easily-swappable-parameters)
std::string_view method, // NOLINT(bugprone-easily-swappable-parameters)
std::string_view body ) const // NOLINT(bugprone-easily-swappable-parameters)
{
std::string current_url( url );
std::string current_method( method );
std::string current_body( body );
for ( int redirect_count = 0; redirect_count < 5; ++redirect_count ) {
const auto parsed_url = parse_url( current_url );
if ( !parsed_url.has_value() ) {
return std::unexpected( parsed_url.error() );
}
const auto [host, path] = parsed_url.value();
const bool is_https = current_url.starts_with( "https://" );
const std::string service = is_https ? "https" : "http";
const std::string cookie_header = build_cookie_header( host );
const FetchResult net_res
= do_network_request( host, service, path, is_https, current_method, current_body, cookie_header );
if ( !net_res.error.empty() ) {
return std::unexpected( net_res.error );
}
const std::string& raw_response = net_res.raw_response;
HttpResponse response;
std::string headers;
parse_response_headers( raw_response, host, response, headers );
if ( response.status_code >= 300 && response.status_code < 400 ) {
const std::string next_url = extract_redirect_url( headers, is_https, host );
if ( !next_url.empty() ) {
current_url = next_url;
if ( response.status_code == 301 || response.status_code == 302 || response.status_code == 303 ) {
current_method = "GET";
current_body.clear();
}
continue;
}
}
sanitize_response_body( response, raw_response );
return response;
}
return std::unexpected( "Too many redirects" );
}
} // namespace ricochet::net
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